Chronology

Louis Renault Patent No. 392,320 (1908): progressive hydraulic gear change

15 July 1908

Louis Renault Patent No. 397,607: liquid speed change (1908)

18 December 1908

Comparative sketches of mechanisms dated 1921 and 1931

1920s-1930s

Souvenir of Charles A. Lindbergh's visit to the Citroën factories (27 May 1927)

27 May 1927

German Patent No. 502623 (1930) — Elastic chassis suspension by Georges Messier

16 July 1930

Blank form K 39-31 "Statement of Standard Components Retouched during Assembly"

1930s

1930s Citroën internal memo repurposed as a draft for dimensioned mechanical sketches

1930s

Handwritten graph of Citroën car deliveries to the commercial department (1927-1936)

1930s

Citroën printed form with numbered grid (B 354-7-33)

undated

Sheet 1: first mechanical sketch dated 8 January 1933

8 January 1933

Sheet 9: three pencil sketches of a mechanical part in section (10 March 1933)

10 March 1933

Sheet 11 bis: current clutch/accelerator control solution (11 March 1933)

11 March 1933

Sheet 10: comparison of solutions A and B (engine/gearbox speed), 11 March 1933

11 March 1933

Sheet 11 — Solution A: pedal, lever and accelerator coordination (11 March 1933)

11 March 1933

Handwritten sketch no. 12 (12 March 1933) — study of a mechanism in section

12 March 1933

Sheet dated 10 May 1933: study of the differential mechanism and the planet gears

10 May 1933

Bowden cable gearbox control sketches (19-20 August 1933)

19 August 1933

Graphic records of clutch time as a function of control speed (17 September 1933)

17 September 1933

Graph of Citroën car deliveries to the Commercial Department (1927-1933)

1933

“1933” folder: handwritten list of technical studies by Paul Magès

1933

Constant depression carburettor: patent application plates (1935)

1935

Citroën Standards "Mechanical Manufacturing": steel treatments and hardness (March 1935)

March 1935

Proposal for modifying the gearbox fork control (3 March 1935)

3 March 1935

Direct gear control project for the PV 11 cv (1935)

3 March 1935

Magès' proposal to simplify the gearbox fork control (1935)

3 March 1935

Descriptive memorandum of the "Constant depression carburettor" by P. Magès (May 1935)

May 1935

German Patent No. 612843 (1935) — Hermine Lobinger's adjustable hydraulic suspension

6 May 1935

Patent No. 791.262: grant certificate for the Magès constant vacuum carburettor

23 September 1935

1936 Communist leaflet against "Monsieur Longeot" at the Citroën-Lecourbe workshop

1936

Handwritten proposal for a constant oil level system for engine crankcases (3 December 1936)

3 December 1936

Constant oil level system for engine crankcase — fair copy of 3 December 1936

3 December 1936

Technical Notebook No. I of the Association Amicale Citroën on belt transmissions (P. Pusard, January 1937)

January 1937

Sheet 7 of 15 January 1939: sketch of a cam and lever mechanism

15 January 1939

Pedal car project — sketches and dimensions (1940)

1940

Direct-acting brake master cylinder, study of 24 April 1940

24 April 1940

Industrial accounting note: alert of 21 May 1940

21 May 1940

Cover page "Documentation" — handwritten folder summary (6 June 1940)

6 June 1940

Test report for the Hotchkiss-Laffly 6-wheel vehicle (Super Contrôle, 6 June 1940)

6 June 1940

Paul Magès' bicycle circulation certificate issued by Citroën (1940)

16 September 1940

Note from P.-J. Boulanger on the role of the quality engineer (25 September 1940)

25 September 1940

1940 file cover: front-wheel drive pedal car and "explosive watch"

1940

Handwritten calculation notes: pedal car, cable and propeller (1940)

1940

Eight pencil sketches: body silhouettes and linkage mechanisms (1940)

1940

Dimensioned sketches of general layout: wheels, dimensions and driving position

1940

Unlabelled supplementary sketches — two automotive silhouette studies (1940)

1940

Distribution note for ancillary manufacturing (Quality), 28 January 1941

28 January 1941

Plan and note on the synchronism indicator (electrical "top" mechanism)

1943

Note from Paul Magès to Mr. Cadiou: "I need a draughtsman" (10 December 1943)

10 December 1943

Comparative table "For equal displacement": conventional engine vs. under-fed engine (1944)

1944

Suspension cylinder project — technical sketch sheet (1944)

1944

Hydropneumatic suspension cylinder drawing — stroke 100, S = 8 cm²

5 January 1944

Ride height correction project: parallel-to-road and pendulum diagrams (1944)

11 January 1944

Front-Rear Interaction Suspension Project (technical note, 13 January 1944)

13 January 1944

Hydropneumatic suspension plans with differential interaction (17 February 1944)

17 February 1944

Hydropneumatic suspension with automatic levelling (1944)

17 February 1944

List of problems under study as of 22 February 1944 (Citroën Design Office)

22 February 1944

Technical Notice E.42401 G — Double switch and bimetallic relay (February 1944)

24 February 1944

Technical note by P. Magès on the influence of the filling ratio (Sheet No. 1, 1944)

June-July 1944

Chart No. 1: Compression ratio and filling to equalise compression pressures (1944)

July 1944

Technical monitoring note: the manufacture of oxygen cylinders for aviation (1944)

1944

Patent project "Starting device for engines" with rubber rings (8 February 1945)

8 February 1945

Plate no. 12 — Diagrams of the rubber starter and its locking mechanism (8 February 1945)

8 February 1945

Plate No. 13 — Electric and automatic unlocking of the "rubber starter"

8 February 1945

1945 manufacturing schedules: Citroën suspension, starter-actuators and brakes

1945

Citroën Design Office work programmes (1945): suspension, starters and Fressard works

1945

Figure plates 1 to 5 of the automatic height adjustment device (1946)

1946

Anti-roll control by a pendulum — technical diagrams (1946)

1946

Paul Magès' notes on the Dowty hydraulic suspension (February 1946)

February 1946

Note by Paul Magès criticising the Bourcier de Carbon patent on the relaxation shock absorber

18 February 1946

Cover of the folder "Theoretical study – hydropneumatic suspension 1943/44"

May 1946

Notebook of the first 2 CV hydropneumatic suspension tests (May-July 1946)

May-July 1946

1946 technical note on the automatic height adjustment and stabilisation device

16 October 1946

Rubber Bibax vs hydraulic suspension: the 1946 Citroën-Michelin correspondence

October-November 1946

Magès' note on the safety of Bibax rubber silentblocks (8 January 1947)

8 January 1947

Citroën road tests: Auvergne (1948), Verdon (1949) and Algeria (1954)

1948-1954

Magès' technical note on high-pressure hydraulic transmission (3 January 1948)

3 January 1948

Chataigner Report: comparative technical analysis of the Renault 4 CV (1948)

15 March 1948

Citroën–Michelin correspondence on rubber suspensions (May 1948)

May 1948

Report on TPV suspension comparative tests — 4 and 8 May 1948

4 and 8 May 1948

Comparative test of TPV suspension, 10 May 1948: A6, A 11 bis and PV

10 May 1948

Hydraulic suspension test on PV — Christ de Saclay, 19 October 1948

19 October 1948

T.P.V. test report at La Ferté, 4 November 1948

4 November 1948

Comparative tests of the Lavoix suspension against the Citroën A.6 (5 Nov. 1948)

5 November 1948

Test no. 218.777: endurance of the rubber suspension on car ELV 230 (14 Dec. 1948)

14 December 1948

Oleopneumatic suspension of the Panther 100 motorcycle (Phelon & Moore) — translated notice, 1949

1949

Cold weather testing: Lapland (1949) and Alps (1952)

1949 and 1952

Hydraulic suspension test report of 12 May 1949 (Mr. Magès)

12 May 1949

Hydraulic suspension tests from 18 May 1949 at Petit Clamart

18 May 1949

Hydraulic suspension test report of 19 May 1949 at La Ferté

19 May 1949

Paris–Clermont road test of 20 May 1949 — suspension setting J

20 May 1949

Citroën dimensioned drawing of a cylinder body / suspension shock absorber (15-16 June 1949)

15-16 June 1949

Test no. 219.084 (1949): comparison of Vacuum 45 and VP 100 oils for Citroën shock absorbers

19 July 1949

Technical note and plan: self-regulating pump with accumulator (21 November 1949)

21 November 1949

Comparative viscosity and distillation curves of a silicone versus Lockheed fluid (1949)

1949

Schematic diagram of the DS 19 hydraulic circuit (1949)

1949

Motorhome on Citroën Type H van — photographic report (1950-1955)

1950s

Citroën Plan No. E.795.050 — Brake stop contacts (March 1951)

March 1951

Folder annotated "Self-regulating mono pump" (23-10-51)

23 October 1951

Pump drawing QM.399 D / E42.401 T: nomenclature and machining critique (29 October 1951)

29 October 1951

Plan E401.144c-147c with handwritten observations by Magès on the machining of the pump

29 October 1951

Handwritten note by Magès on the replacement of the pump design and its machining defects (15/11/51)

15 November 1951

Pump plan: nomenclature, position reference and Magès' machining critique (15/11/1951)

15 November 1951

Incident on the ELV.238 test car with hydraulic suspension (23 November 1951)

23 November 1951

1951 calculation sheet: DS rear hydropneumatic suspension curves

1951

Graphic test record "Acceleration - braking in 1st gear" (1951)

1951

Assembly sheets for test cars with hydraulic suspension (Dec. 1951 – Feb. 1952)

1951-1952

First handwritten sketch of a hydraulically operated gear change (1952)

1952

Hydraulic circuit sketch with pipe markings (R, PV, Acc, PM) — 1952

1952

Plates P 1214_1 and P 1214_2: diagrams of the hydraulic gear shift

1952

Laboratory Report No. 220.620: incidents on the ELV.230 after 12,000 km

8 February 1952

Citroën Laboratory Report No. 220.629 on incidents with the ELV.238 prototype

14 February 1952

Endurance test report for the PVL ELV.324 hydraulic suspension (6 March 1952)

6 March 1952

Test No. 220.657: dismantling of the ELV.230 hydraulic rear axle after 20,000 km

11 March 1952

Citroën Laboratory report on shock absorber and reservoir (14 March 1952)

14 March 1952

Torsion tests of PVS and PVL rear axles (Citroën Laboratory, 14 March 1952)

14 March 1952

Test report no. 220.692: dismantling of the rear axle of the PVL6 ELV.136

21 March 1952

Failure of a rear suspension arm on the PVS ELV.280 after 24,000 km (1952)

25 March 1952

Test report no. 220.769: dismantling of the rear suspension of the ELV.238 (25 April 1952)

25 April 1952

Test report no. 220.777: endurance of H suspension cylinder seals

30 April 1952

L'Auto-Journal No. 55 (1 June 1952): first scoop on the future Citroën 10 CV

1 June 1952

Manuscript study of the "garage position" of the hydraulic gear shift (29.9.52)

29 Sept. 1952

Citroën shock absorber nomenclature sheet (ref. E.401.9xx) — 22 October 1952

22 October 1952

Wales “Hydra Springs” Bulletin (1952): hydraulic cylinders and Comproil fluids

1952

Photographs of worn suspension parts — shots no. 39636 to 39640

1952

Wales « Hydra News » No. 1 (1953): tension spring with dampened return

1953

Wales “Hydra News” No. 3: the flexibility of identical Hydra Springs (1953)

1953

Calculation note: wall thickness of the hydropneumatic accumulator (1953)

1953

German Patent No. 867 057 (Deveson) — rotating shaft suspension for trucks

16 February 1953

Citroën letter to the Mines Department (12 March 1953) regarding the hydropneumatic accumulator

12 March 1953

Note on the safety of the hydraulic unit (12 March 1953)

12 March 1953

Michelin note no. 1377: D 434-94 seals and replacement of Vulkacit AZ with Santocure (10 Sept. 1953)

10 September 1953

Note No. 1380: Michelin formula validated for D 434-94 seals (1953)

22 September 1953

Swiss Patent No. 291970 (Daimler-Benz) — automatic height corrector, 1953

1 October 1953

Principle of the hydraulic pressure regulator (7 October 1953)

7 October 1953

Wales Hydra News No. 2 (1953): Hydra Springs compression spring catalogue

© 1953

Wales Hydra News No. 5: an Hydra Spring for an explosive military device

1953

Regulatory descriptive statement of the Citroën hydropneumatic sphere (1953)

1953

Handwritten note: 'at the limit' test of the 15 H at La Ferté-Vidame (1954)

1954

Patent drawing sheets “Power steering” — figures 1 to 3 (1954)

1954

Diagram of the hydraulic installation of the 6 H vehicle (Citroën 15 Six-H)

1954

Technical plates of the hydraulic components of the Citroën 15 Six-H (1954)

1954

Plan D314-02: clutch control cylinder and piston (Citroën, 1954)

20 January 1954

Gearbox piston plan D334-26 — hydraulic fork control

15 March 1954

Road test of the 15 Six H (ELV 412) by Paul Magès, 3-5 April 1954

3 April 1954

Test drive report of the 15-Six H with power steering (3-5 April 1954)

3-5 April 1954

1954 Citroën Patent: hydraulic servo-steering with rotary distributor

1 May 1954

Dealer Note No. 600: repairing the hydropneumatic suspension of the 15 Six-H

6 May 1954

Handwritten sketch: first diagram of a power steering system (May 1954)

15 May 1954

Dimensioned drawing of the clutch control piston D 314-12 (Citroën, 1954)

29 July 1954

Technical note "Variable geometry steering" (ref. D 12 54, 26 Dec. 1954)

26 December 1954

Handwritten divider "54 to 57 — Piston, clutch release cylinder"

1950s

Hydra News No. 4 (1954): The compressibility of Comproil oils, annotated by Magès

1954

Draft commercial notice: comfort and road holding of the 15 H

1954

Photographic report: construction and sailing of a catamaran (1955)

1955

Brake distributor and its control — Citroën technical sheet (P.M. 12.1.42)

1955

Sketch of the disc brake block (HP inlet / return) — DS19 file, 1955

1955

Technical note of 20 February 1955 on the hydraulic brakes of the type 55-B truck

20 February 1955

Note "Reflections on braking" by Paul Magès (20 February 1955)

20 February 1955

Thaon-Cadiou memorandum (18 March 1955): transmission of documentation on "Hydra-Springs"

18 March 1955

Drawing of cylinder D334-25a — hydraulic control for fork shafts (1955)

8 April 1955

Specifications D334-07 — Leak and oil pressure tests (15 April 1955)

15 April 1955

German Patent No. 929 465 (Fox & Rice, GM) — bellows-type pneumatic suspension

27 June 1955

Body plan D314-11 — Clutch control cylinder (specifications, 1955)

1 July 1955

L'Auto-Journal No. 134: "Here is the Citroën bombshell" — revelation of the future DS

15 September 1955

Citroën DS Plan 314.04 — Re-clutching corrector, sections A and B (22 September 1955)

22 September 1955

Drawing of finger D334-147 — Citroën DS selector body (28 October 1955)

28 October 1955

Citroën Plan E833 2704 — Hydraulic gear and clutch control (17 Nov. 1955)

17 November 1955

Plan DS334-07a (25 November 1955) — Piston-liner assembly and matching

25 November 1955

Citroën technical note: adoption of VF10 brake fluid (1 December 1955)

1 December 1955

Standardisation note no. 128: designation of liquids VF 10 A and VF 10 B

1 December 1955

Citroën technical note: arbitration on the DS hydraulic fluid (5 December 1955)

5 December 1955

DS mountain test report — André Citroën Laboratory, 5 December 1955

5 December 1955

Citroën Laboratory report on piping defects of a production DS (22 December 1955)

22 December 1955

Handwritten chronology of hydraulic transmission and suspension tests (1955-1960)

1955 to 1960

P. Magès note no. 570108: transmitting movement via hydraulic channels

1956

Paul Magès' note on the engine-transmission problem (1956)

1956

Cold weather test on DS (Dec. 1955) — Citroën Laboratory report no. 222 995

4 January 1956

2nd addition to patent P.685.691: a flow regulator with perforated discs (1956)

20 January 1956

Laboratory Report No. 223 080: DS cold weather tests (8 February 1956)

8 February 1956

Plan D 334-014 — Flow regulator: piston-body matching and test (10.2.1956)

10 February 1956

B.E.A. conference notes of 13 February 1956: DS incidents related to cold weather

13 February 1956

Summary of the folder "SAGA air suspension" (14 February 1956)

14 February 1956

Citroën Bulletin No. 524 (15 February 1956): the DS 19 triumphs at the Monte-Carlo Rally

15 February 1956

Citroën Bulletin No. 524 (15 February 1956) — The DS 19 at the Monte Carlo Rally

15 February 1956

Citroën note of 23 February 1956 on the Citroën–Simca trial (road holding)

23 February 1956

Citroën-Simca lawsuit regarding 'road holding': the full judgment (L'Argus, 23 February 1956)

23 February 1956

The Citroën-Simca affair: the Commercial Court judgment (20 February 1956)

23 February 1956

Citroën DS 142-09 Drawing — Idle control device (2nd speed), 28 March 1956

28 March 1956

Magès Note no. 560.108: reasoning on a continuously variable transmission (1956)

4 April 1956

Note No. 560.122 by Paul Magès: principle of a hydraulic transmission (4 April 1956)

4 April 1956

Magès Note no. 560.331: first hydraulic transmission diagram (4 April 1956)

4 April 1956

Note No. 560.108 — Reasoning on the use of the engine with a continuously variable transmission (1956)

4 April 1956

Note No. 560.122 — Hydraulic transmission with generator and wheel receivers (1956)

4 April 1956

Note No. 560.331 — Hydraulic transmission: general diagram and controls

4 April 1956

BEA inspection of the D 314-02 clutch release cylinder — groove volume (test 42.80G)

3 October 1956

Technical drawing of the DS 334-26 piston — hydraulic control of the selector forks (6 October 1956)

6 October 1956

Technical drawing of cylinder DS 334-25 — Hydraulic control for fork shafts (1956)

6 October 1956

Assembly diagram of gearbox control pistons — plan E806-2.200 (Védie, 6 Nov. 1956)

6 November 1956

Technical drawing DS 314-11 — Clutch control cylinder, type T detail

27 December 1956

1956 Citroën Patent “Improvement to vehicle suspension” — constant attitude via radar and magnetic memory

1956

Patent diagram 1000/56 — constant-level suspension mechanism

1956

Summary of the folder "Hydrostatic Transmission (H.T.)" — Box No. 3 (1956-1974)

1956-1974

Article by Maurice A. Julien on compensated pneumatic suspensions (1956)

1956

Citroën technical brochure: the hydraulics of the DS 19, ID 19 and Break

1956

Photographs of Citroën vehicles: public presentation and sedan registered 1956

1950s

DS 314-02 clutch release cylinder plan and leak tester tightness test (1957)

4 January 1957

DS 314-12 clutch control piston drawing (Citroën, 1957)

4 January 1957

Drawing of the DS 314-35 clutch control piston stop nut

4 January 1957

Distribution of work at the Citroën BEA as of 15 January 1957

15 Jan. 1957

Note from Mr. Delerive to Paul Magès regarding grievances against the Dowty company (21 February 1957)

21 February 1957

Internal memo from Paul Magès (1 March 1957) on the failure of 'Dowty' seals

1 March 1957

Paul Magès' reflections on SAE report 28: Cadillac Eldorado air suspension

5 March 1957

Assembly diagram of the gear control pistons on gearbox — plan E806-2309 (Védie, 1957)

8 March 1957

Type approval report for the Citroën ID 19 P (16 April 1957)

16 April 1957

Assembly plan for the front/rear cylinders of the hydraulic gear control (E806-2336/2337)

5 May 1957

Front/Rear cylinder assembly E806-2346/2347 — hydraulic gear control (Védie, 1957)

5 May 1957

“Air suspension and its problems” — American Automobile press note, Sept. 1957

September 1957

Citroën Bulletin No. 544 (Sept. 1957): end of the Traction and Milan Grand Prix for the DS 19

September 1957

DS and ID cost price improvement programme — meeting of 9 September 1957

10 September 1957

Handwritten note (1957): project for a "luminous map" for car navigation

15 September 1957

Paul Magès' internal memo regarding defective balls in DS HP pumps (2 December 1957)

2 December 1957

SKF letter of 2 December 1957 regarding defective balls for the DS 19 HP pump

2 December 1957

Pressure readings for suspension pneumatic blocks (P 1662), 9 December 1957

9 December 1957

Handwritten note from Paul Magès to Mr. Cadron on pneumatic suspension classes (1957)

1957

Handwritten comparative study: DS hydropneumatic suspension vs Cadillac Eldorado pneumatic suspension

1957

Translated note: air suspension and its problems on 1958 American models

1957

DS/ID hydraulic defect reports and 100,000 km quality schedules (1957)

1957

B.E.A. Meeting no. 584 of 7 January 1958: Paul Magès' work schedule

7 January 1958

Magès patent project (1958): automatic regulation for continuously variable transmission

10 February 1958

Magès calculation note: P55 suspension, leaf spring and 6 spheres (4 March 1958)

4 March 1958

Paul Magès' note on the braking of the DS 19 (2 April 1958)

2 April 1958

Test report of 23 April 1958: friction of front suspension components (Dascotte)

23 April 1958

Modification schedule for the D.391.8 pressure regulator sleeve (DS/ID)

9 June 1958

“Air suspension encounters difficulties in the United States” — The Autocar translation, 1958

20 June 1958

Monitoring of DS technical issues: study notes completed and pending (8 Sept. 1958)

8 September 1958

Bercot-Brueder meeting of 8 October 1958: the DS hydraulic “catastrophe” incidents

8 October 1958

DS HP pump flow curves — Hydraulic Laboratory tests (November 1958)

November 1958

Blueprint of the DS 7-piston high-pressure pump no. E 401.8444 (November 1958)

Nov. 1958

Conference of 21 November 1958: shortage of H.P. pumps at Citroën agents

21 November 1958

Request to the Laboratory for a pre-production run of 100 DS HP pumps (25 November 1958)

25 November 1958

Service Note 11870 (25 Nov. 1958) – DS and 1D engine breather defect

25 November 1958

Conference of 26 November 1958: DS/ID quality points

26 November 1958

Patent No. 659 310 (1958): an elastic ring servo-control for Citroën steering

3 December 1958

B.E.A. Meeting no. 42 (3 December 1958): development of the DS H.P. pump

3 December 1958

Citroën 1958 Patent: servo-control device for vehicle steering

3 December 1958

Patent sheet: figures 1 to 5 of the steering servo-control device (1958)

3 December 1958

Paul Magès note: DS improvement programme – HP pump and pressure regulator (10 December 1958)

10 December 1958

DS hydraulic incident logbook: observations and modifications (1957-1958)

1957-1958

List of technical journals for reading — page 2 (January 1959)

January 1959

Journals for reading (15-31 January 1959) addressed to Mr. Magès at the B.E.A.

15-31 January 1959

Note of 28 January 1959 on the delay of the height corrector sealing cup

28 January 1959

B.E.A. Meeting no. 108: DS hydraulic quality review with Paul Magès (28 January 1959)

28 January 1959

Translation of a Consumer Reports article (June 1959) on the failure of American air suspensions

June 1959

Handwritten note of 24/6/1959: capacity per side or per axle, effects on pitch and roll

24 June 1959

Handwritten note of 24 June 1959 – "Capacity per axle" case: calculation of pressures in a turn

24 June 1959

Handwritten note of 29 June 1959: capacity per side vs capacity per axle

29 June 1959

“New Trends in Using Air Suspension” — British article citing the Citroën cylinder (July 1959)

July 1959

Magès note to Mr. Bongeard: suspension calculations and rubber bump stop (2.7.59)

2 July 1959

Note from Paul Magès proposing the monitoring of 10 DS taxis and 10 ID taxis for hydraulic tests (2 July 1959)

2 July 1959

“Saving Space with the Liquid Spring” — Product Engineering article (17 August 1959)

17 August 1959

Note of 11 September 1959: hydraulic or pneumatic suspension and the Bougeard patent

11 September 1959

Letter from A. Bougeard to Paul Magès regarding 2 CV suspension tests (5 November 1959)

5 November 1959

Magès' supplementary note on spool overlap (10 November 1959)

10 November 1959

Note "Fluid distribution spool" (18 November 1959)

18 November 1959

Adjourned patent: three-way valve with adjustable overlap length (22 Dec. 1959)

22 December 1959

Magès note: replacing hydraulic regulation with a centrifugal governor (DS, 1959)

24 December 1959

Cover of the archive folder "Hydrostatic transmission 59-74"

59-74

Handwritten cover page: "M. Bongrand — Air suspension, 59-61"

1950s

Summary of the "60-74" folder: BEA meetings, projects and decisions (1959-1974)

1959-1974

Manuscript summary of hydrostatic transmission tests (1955-1960)

1960

DS 19 hydraulic circuit diagram with centrifugal regulator and separate brake return (SC 74424)

1960

Diagram of a hydrostatic transmission (ref. E 401 10)

1960

Diagram D.73 — Hydraulic gear control and clutch circuit (DS, 1960)

1960

Conference with Mr. Cadiou (2 February 1960): hydraulic and suspension programme

2 February 1960

Meeting minutes of 17 February 1960 regarding the Bougeard suspension patent

17 February 1960

Handwritten notes from the conference with Mr. Cadiou on 20 May 1960 (gearbox, synchro)

20 May 1960

Tests of the 2 CV with hydrostatic transmission at Mont Ventoux (29 June 1960)

29 June 1960

Annotated photograph "29 June 1960" linked to hydrostatic transmission tests

29 June 1960

Patent No. 832,245 (1960): regulation of hydraulic motors with variable swash plate

6 July 1960

Citroën Patent No. 832,244: electric generator with integrated hydraulic motor (1960)

6 July 1960

Citroën patent of 8 July 1960: regulating device for hydraulic motors (file 4387)

8 July 1960

Citroën Patent No. 833,391 (1960): servo-control of a hydro-electric unit motor

19 July 1960

Draft addition to patent 833.391: thermal compensation using thermistors (26.10.1960)

26 October 1960

BEA note by Paul Magès on hydraulic mini-motors (windscreen wiper, fan, electricity), 1960

8 November 1960

Letter from Paul H. Taylor (Tayco) to Citroën proposing Liquid Spring comparative tests, 12 December 1960

12 December 1960

Distribution of Citroën hydraulic group activities among engineers (1960?)

1960 (uncertain)

Tayco Note: comparing the "Liquid Spring" to the Citroën suspension, "best in the world"

1960

Handwritten note by Magès: installation of a hydrostatic unit on the front axle

1960

Cover of the archive folder "60-74" (box no. 2)

1960s

BBC conferences of 28 Nov. and 13 Dec. 1960: DS suspension, clutch and braking

Nov.-Dec. 1960

Magès patent addendum: anti-roll device for hydraulic steering servo-control

1961

Photographic report of the servo-controlled anti-roll assembly — ELV 569 test (1960-1961)

1961

1961 patent addendum: anti-roll device for motor vehicles

1961

B.E.A. meeting record of 17 January 1961: Bourgard air suspension versus hydropneumatic

17 January 1961

Alternators and electro-hydraulic regulation: status update with C.G.E. (23 February 1961)

23 February 1961

Magès note: numerical comparison of the DS gas spring and the Tayco liquid spring (6 March 1961)

6 March 1961

Magès Minute: why a liquid spring cannot replace hydropneumatics (6 March 1961)

6 March 1961

Paul Magès' notes on the DS clutch and gear control (28 March 1961)

28 March 1961

Patent application file 4.379: the three-way valve with adjustable overlap (20 May 1961)

20 May 1961

Three-way valve with adjustable overlap — Magès patent application (20 May 1961)

20 May 1961

Magès note of 19 June 1961: assessment of the Bongrand affair and comparison of suspensions

19 June 1961

Magès study: 3-way distribution valve with adjustable overlap (26 June 1961)

26 June 1961

Note on "Servo-controlled anti-roll for motor vehicles" by Paul Magès (P 2908)

17 July 1961

BEA Note 43.027: Paul Magès warns about hydraulic safety (19 December 1961)

19 December 1961

Paul Magès' drafts: gas spring versus liquid spring, comparative calculations for the DS

1961

Handwritten note by Paul Magès on the characteristics and technology of the hydropneumatic shock absorber

1961

Los Angeles information on DS incidents (1962)

1962

Inquiry No. 5,719: Paul Magès inventories hydraulic leaks on the DS 19 (25 January 1962)

25 January 1962

Comparative curves manual gearbox / H.T. on DS 100 HP (Prestrelle, February 1962)

February 1962

BBC meeting summary of 22 February 1962: suspension, gearbox and hydrostatic transmission

22 February 1962

Road test from 2 to 5 April 1962: hydraulic anti-roll and 100% power-assisted steering

2 April 1962

Note from Magès to Cadiou: endurance results for 2.2 cm³ hydraulic motors (19.12.1962)

19 December 1962

List of journals for reading — page 2 (November 1962 to January 1963)

Nov. 1962 - Jan. 1963

Paul Magès' note on the AP suspension (22 February 1963)

22 February 1963

BBC conference notes of 28 February 1963: suspension, AFC body, steering and gearbox

28 February 1963

Rolls-Royce / Citroën interview of 18 March 1963 on the hydraulic braking circuit

18 March 1963

Note of 20 March 1963: Citroën/Rolls-Royce meeting regarding a hydropneumatic suspension licence

20 March 1963

“Journals for Reading” bulletin Citroën, 1-15 April 1963, intended for Mr. Magès

April 1963

Paul Magès Note 39 (13 May 1963): alert regarding the reinforcement of rear anti-roll bars

13 May 1963

Letter from the Citroën importer in Bangkok reporting serial failures on DS (31 May 1963)

31 May 1963

SNECMA Note No. 63/667: investigation into a DS 19 steering accident (1963)

20 June 1963

Steering incident on a DS: SNECMA-Citroën correspondence (27 June 1963)

27 June 1963

Steering incident on a DS 19: letter from SNECMA to Citroën (27 June 1963)

27 June 1963

Note from Mr. Clément (Super Control) to Mr. Cadiou regarding Mr. Mahoudeau's accident

3 July 1963

Handwritten note dated 28 August 1963 to Paul Magès regarding stiff gear shifting on a DS

28 August 1963

Note from Paul Magès to Mr. Fabien regarding the testing of the 2 CV AL12 with hydrostatic transmission (11 December 1963)

11 December 1963

Plan E 39.7972 — Comparison of two suspension damper solutions (1963)

25 December 1963

Suspension project plan — VITIER drawing, ref. E 201-294 (27 December 1963)

27 December 1963

Endurance test monitoring of the 2 CV A12 with hydrostatic transmission (1963-1966)

1963 to 1966

Citroën technical press review (1-15 September 1963) sent to Paul Magès

1963 (probable)

Study of a permanent magnet hydraulic pressure regulator (January-April 1964)

Jan-Apr 1964

Paul Magès's argumentation for a derogation from the 1943 decree on pressurized gases (January 1964)

20 January 1964

Photograph referenced EJV 640 — under the bonnet of a hydrostatic 2 CV, 7 February 1964

7 February 1964

Photograph referenced ELV 640 — under the bonnet of a hydrostatic 2 CV, 7 February 1964

7 February 1964

Photograph referenced ELV 724 — under the bonnet of a hydrostatic 2 CV, 7 February 1964

7 February 1964

Prestrelle technical note: regulation of a hydrostatic converter (P.4331)

17 February 1964

Addendum to the automatic regulation device for hydrostatic transmissions (file 4466)

23 March 1964

Minutes of the 'P1 Operation' meeting of 1 April 1964

1 April 1964

Handwritten notes and curves on the power and scavenging of the P1 auxiliary engine (1 April 1964)

1 April 1964

Folder "REA session concerning the 2-stroke engine" (3 April 1964)

3 April 1964

Status report of 15 June 1964 on the work of the Citroën Hydraulic Study Group

15 June 1964

Activity report of 15 June 1964 on the work of the Hydraulic Study Group

15 June 1964

Improvements to pumps: Paul Magès' inertial suction valve (18 July 1964)

18 July 1964

NSU – M4 – DS62 comparison: consumption and acceleration tests (20 July 1964)

20 July 1964

Magès' handwritten notes: "Presentation T.H. 50 CV" at the B.E.A. (15.9.64)

15 September 1964

Note from Paul Magès to Henry-Brabant on the tests of car 1028 (1 November 1964)

1 November 1964

Handwritten comparative calculations for P1 1800/1975 cm³ and 220 SF six-cylinder engines

1964

The Zenith-Stromberg CD carburettor: principle, SU settings and adaptation to the 2 CV

1964

Technical diagram sheet P.5043 — servo-controlled anti-roll circuit (Fig. 1)

8 April 1965

Translation of a South African article (June 1965) on the Citroën-NSU project and its radar suspension

June 1965

Analysis sheet: Citroën-NSU two-engine and radar suspension project (Motorist, June 1965)

June 1965

Patent P 5069 — Automatic headlight orientation in corners (8 June 1965)

8 June 1965

BBC meeting notes (23 Nov. 1965): visit to Rolls-Royce and hydrostatic transmissions

23 November 1965

Périneau Note no. 4: regulation of a hydrostatic converter (29-12-65)

29 December 1965

Study of a multiple connector for fluid piping (17 February 1966)

17 February 1966

Note from Pierre Bercot and Paul Magès's reply regarding AP vibrations (28 February 1966)

28 February 1966

Paul Magès' notes on the Demange study regarding technical documentation for the network (April 1966)

6 April 1966

Paul Magès' note to Bercot on the AP 3: beyond hydropneumatics (May 1966)

18-20 May 1966

ELV 1004 servo-assisted return steering: Magès' note and enthusiastic test (8 July 1966)

8 July 1966

Barthélemy note to Allera and Magès on the reversed DX front axle (14 December 1966)

14 December 1966

Assembly drawing of cylinder and suspension sphere for vehicle Y (1966)

1966

Lachaize note on brakes, the AP, the 3 CV, the FZ, the future DS and the S vehicle (1966-1967)

July 1966

Paul Magès' notes of 30 January 1967: halting of project F and defects of the NSU engine

30 January 1967

Draft letter from Paul Magès to Mr. Grosseau regarding vehicle F (1967)

1967

Handwritten note from 1967: organisation of road tests and vibration research

1967

1968 DS swivelling headlights: Cibié and Citroën press clippings (1967)

1967

Ministerial letter notifying the appointment of Paul Magès as Chevalier of the National Order of Merit (1968)

15 May 1968

Summary of the Citroën hydraulic group for the meeting with FIAT (25 Nov. 1968)

25 November 1968

Assessment of H.T. tests (2 CV, 3 CV) and comparison of the number of parts (26.11.1968)

26 November 1968

1969 DS commercial study: customers who left and customers who came from the competition

February 1969

Draft letter from Paul Magès to Mr. Sarre and interview plan of 11 May 1969

May 1969

Draft letter from Paul Magès to Mr. Grosseau: tensions in the design office and connecting frame of the L car

October 1969

Diploma of the 1970 Grand Prix of Art and Industry awarded to Paul Magès

1970

Note no. 669 by Paul Magès on the Direction à Rappel Asservi (16 February 1970)

16 February 1970

Note No. 868 (7 April 1970): the maintenance cost of hydropneumatic suspension quantified

7 April 1970

Corbel note to Grosseau: aerodynamics and speeds of vehicle G versus D, S and competitors (4 May 1970)

4 May 1970

Cover: Course Aide-Mémoire "Steering" — SM Vehicle (June 1970)

June 1970

DIRAVI manual: assistance, hardening and power-assisted return of the SM steering

June 1970

Handwritten note of 1 June 1970 on limiting rear wheel spin

1 June 1970

Note P. 6912: an anti-slip device for rear-wheel drive cars (1970)

1 June 1970

Citroën internal information note no. 032: "The Citroën-Fiat agreements" (3 June 1970)

3 June 1970

B.E.A. Note no. 859: Citroën's contribution to automotive safety (6 June 1970)

6 June 1970

Study of an electrically controlled progressive valve (15 June 1970)

15 June 1970

Letter from J. Wolgensinger to Paul Magès regarding the SM steering (25 September 1970)

25 September 1970

Note from J. Wolgensinger to Paul Magès on the first SM trials (1970)

25 September 1970

Technical response from Paul Magès to Maître Falque — Delmont Case (28 October 1970)

28 October 1970

Magès's response to the Mines department regarding road-holding tests (7 Nov. 1970)

7 November 1970

Detailed note from Magès to engineer Gauvin on road-holding regulations

7 November 1970

SM pricing: the report by insurer Rosset and Paul Magès's response (February 1971)

February 1971

Dimensioned drawing of a "Calorstat" hydraulic part — Vedie drawing, ref. E1004-7843

10 February 1971

Barthélemy note: impact of a 5 cm front track variation on weight (vehicle L, March 1971)

March 1971

Draft letter from Paul Magès to Mr. Grosseau regarding the specifications for vehicle L (11 March 1971)

11 March 1971

Paul Magès' note on the feasibility of an L vehicle at 16,000 F (11 April 1971)

11 April 1971

BEA Allera-Magès note: weight distribution of vehicle G and price estimate for the 1971 L

14 April 1971

Preliminary design of hydropneumatic suspension for a FIAT vehicle (Mr. Petitdidier, 12 May 1971)

12 May 1971

Note from Paul Magès to Mr. Grosseau claiming his rights as an inventor (21 November 1971)

21 November 1971

Letter from Paul Magès to Mr. Grosseau regarding the "Apollo Innovation" Grand Prix (1971)

22 November 1971

Handwritten notes by Paul Magès: weight distribution and price of vehicle G and L (1971)

1971

Note from Magès to Grosseau: refusal to join the BHRA (22 February 1972)

22 February 1972

“Lean mixtures are clue to cleaning up motor exhausts” — The Engineer, 30 March 1972

30 March 1972

Road Test, April 1972: complete test and technical report of the Citroën SM

April 1972

Article "How Much Shake Can Bolted Joints Take?", Machine Design, 5 October 1972

5 October 1972

Paul Magès note: the unfavourable price/quality ratio of the rotary engine (Nov. 1972)

November 1972

Barthélemy's note on the advantages of the frame for the "L vehicle" (8 November 1972)

8 November 1972

Temperature test report on GS 1015 engine in winter conditions (1972)

1972

1972. Power-assisted steering with self-centering on the SM Maserati.

1972

Citroën brochure "Main technical characteristics of 1973 saloons"

January 1973

Translation SAE 730154 (1973): combustion chamber, spark plug and NOx emissions (Nissan)

8-12 January 1973

Handwritten note from Paul Magès to Mr. Rollier announcing his retirement (1973)

22 February 1973

Citroën Sales Argumentary "Face to Face" No. 2: R4 Luxe vs 2 CV6 (March 1973)

March 1973

“Method for not breaking eggs” — handwritten note by Paul Magès on kinetic energy (24 March 1973)

24 March 1973

Handwritten note “Method for not breaking eggs”

24 March 1973

“Method for breaking or not breaking eggs” — kinetic energy explained (April 1973)

April 1973

“Passive safety — The motorist and the technician”: educational dialogue on the formula F = P·V²/D·0.394

25 April 1973

Handwritten calculation notes: establishment of the force formula F = 0.394 V²P/e

25 April 1973

Collective agreement for Citroën establishments in the Paris region (27 April 1973)

27 April 1973

Translation 73-139: an Italian device to improve the "pick-up" of carburettor engines (1973)

June 1973

Citroën S.A. Annual Report — 1972 financial year, general meeting of 27 June 1973

27 June 1973

Speech by François Rollier at the Citroën S.A. AGM (27 June 1973)

27 June 1973

Bernard's note to Jouny on Asnières hydraulic manufacturing (5 July 1973)

5 July 1973

Citroën internal information: launch of the GS Birotor (25 July 1973)

25 July 1973

Schwarz, Stumpp, Knapp: "K-Jetronic", original German article, ATZ No. 11 (November 1973)

November 1973

Magès note of 25 November 1973: plea for the hydrostatic variator of the “L” vehicle

25 November 1973

Summary of hydrostatic transmission vehicle tests (1960-1973)

5 December 1973

Note by P. Magès: adapting the engine to the automatic ratio variator (P.7994, 16.12.1973)

16 December 1973

Record of mileages for Hydrostatic Transmission test vehicles (1960-1973)

1973

Paul Magès' presentation on hydrostatic transmission and the choice for the “L” vehicle

Nov. 1973 - Jan. 1974

Revue Automobile clippings on the Bosch K-Jetronic injection system annotated "M. MAGES" (1972-1973)

1972-1973

Translation of the 1973 ATZ article on the K-Jetronic, Bosch continuous injection system

1973

Press clippings: "Two new successes" — the launch of the CX 2000 and 2200 (1974)

1974

Photographs of Paul Magès' retirement (1974)

1974

Retirement party photograph: the group in front of the Citroën C35 poster

1974

Tribute to Gabriel Voisin and unpublished text "Radotages" — Ingénieurs et Techniciens, January 1974

January 1974

Anonymous clinical presentation of the “L” against the DS and its rivals (March 1974)

March 1974

Ancillary uses of hydrostatic transmission: alternator, fan, air conditioning (3 April 1974)

3 April 1974

J. Hondet note: compressed air as buffer energy for the 2 CV (May 1974)

May 1974

Citroën Internal Information No. 078 of 7 May 1974: the French automobile industry in the 1st quarter of 1974

7 May 1974

Citroën Internal Information No. 079 of 11 June 1974: market and sales promotion

11 June 1974

Message from François Rollier (24 June 1974) announcing the Citroën-Peugeot-Michelin merger

24 June 1974

Citroën Internal Information No. 080 (15 July 1974): June production and Peugeot agreement

15 July 1974

Press clippings of 19 July 1974: the takeover of Citroën by Peugeot and the anger of the executives

19 July 1974

Citroën internal bulletin no. 081 (August 1974): launch of the CX 2000 and 2200

August 1974

Press clippings: Zénith CL petrol injection analysed by the Revue Automobile (1974)

22 August 1974

Letter from Roland Meignan to Paul Magès on his retirement (1974)

20 September 1974

Farewell speech by A. Grosseau for the retirement of Paul Magès (1974)

26 September 1974

Citroën internal bulletin no. 082 (27 Sept. 1974): production, markets and CX advertising launch

27 September 1974

Le Figaro, 3 December 1974: imminent Citroën-Peugeot and Berliet-Saviem mergers

3 December 1974

Le Figaro, 4 December 1974: the Peugeot-Citroën agreement under the aegis of the State

4 December 1974

Citroën technical plates — GS hydrostatic transmission, series E106B (P.7245)

1974

Handwritten cover page: "carburation and injection" file on a Roussillon article (1974)

1974

Roussillon (1974): measuring engine air flow using sonic nozzles

1974

Chapoux (UTAC), "Anti-pollution action and fuel economy", Pollution Atmosphérique No. 61, 1974

Jan-Mar 1974

Anti-pollution positive-displacement turbocharger: test on a Renault R4 engine (1974)

1974

France-Soir, 9 May 1975: the end of the DS and the suspension of the Mercedes 450 SEL 6.9

9 May 1975

“Homage to the Goddess” — Testimonies from the Veterans on the birth of the DS (Citroën Information No. 740, 1975)

September 1975

1975. His career at Citroën.

1975

1975. Letter from a DS 19 enthusiast and Paul MAGÈS's reply.

1975

Citroën Plan E 3091 — Hydrostatic transmission of vehicle L, 2nd generation

1976 (uncertain)

Commemoration programme for the submarine Eurydice, Ramatuelle, 9 March 1980

9 March 1980

Letter from Roger Brioult to Paul Magès (23 November 1981)

23 November 1981

Deliberation of the municipal ballot in Ramatuelle: Paul Magès elected in the lead (636 votes)

1983

Ramatuelle Municipal Council (1983): Paul Magès, 2nd Deputy Mayor

6 March 1983

Municipal decree of Ramatuelle delegating civil registry functions to Paul Magès (1983)

25 August 1983

“The DS: 30 years later” — Interview with Paul Magès in L'Est Républicain (1985)

10 November 1985

Summary table of the number of Citroën cars with hydropneumatic suspension (end of 1988)

2 April 1989

Auto Plus article no. 32 on "L'album de la DS" and Paul Magès

19 April 1989

Portrait of Paul Magès in Ramatuelle, "the Professor" and "saviour of De Gaulle"

29 June 1989

Portrait of Paul Magès "the Professor" in the Ramatuelle newspaper (1989)

29 June 1989

Letter from Roger Brioult to Paul Magès denouncing the ingratitude of PSA (20 July 1989)

20 July 1989

Presentation of the "Cahiers Experts de l'Hydraulique" — CIFC distance learning

1990s

Welcome booklet "Welcome... The keys to your success" — Hydraulic Expert Notebooks

1990s

Hydraulics Quiz No. 5 — DIRASS, DIRAVI and pressure regulator

1990s

Hydraulics Quiz No. 5 (second copy) — DIRASS, DIRAVI and flow rates

1990s

Hydraulics Quiz No. 6 — the ABS braking circuit (copy 1)

1990s

Hydraulics Quiz No. 6 (second annotated copy) — power braking and ABS

1990s

Hydraulics Quiz No. 1 — pressure, force and braking circuit

1990s

Hydraulics Quiz No. 2 — high-pressure pump, pressure regulator and accumulator

1990s

Hydraulics Quiz No. 2 (second copy): pressure source and accumulator

1990s

Hydraulics Quiz No. 3 — hydropneumatic suspension and frequency calculation

1990s

Hydraulics Quiz No. 3 (second copy): suspension and frequency calculation

1990s

Hydraulics Quiz No. 4: Hydractive suspension and circuit diagram (ex. 1)

1990s

Family photos in Pampelonne-Ramatuelle (1990)

1990

Hydraulics Quiz No. 4 (second copy) — Hydractive I and II suspension

1990s

CTV Information Note (1997) announcing "Rue Magès" among 8 street names

1997

Photographs of the "Rue Paul Magès" sign at the Vélizy Technical Centre

1997

Letter from the CTV Communication Department to Paul Magès, 31 July 1997

31 July 1997

Paul Magès' reply to the CTV Communication Department, 12 August 1997

12 August 1997

Obituary article: "Paul Magès is no more" (1999)

1999

Tribute to Paul Magès: the unpublished testimony of the inventor, collected before his death

1999

Photographs of the tribute to Paul Magès: gathering of DS and procession (1999)

1999

August 1999: last filmed interview with Paul Magès, one month before his death

August 1999

Internal AC COMINT "Hydraulics" memo distributed to regional directors (1999)

30 September 1999

Speech by the Mayor of Ramatuelle in tribute to Paul Magès (1999)

30 October 1999

Letter from Roger Brioult to Michel Magès regarding publication authorisation (2000)

10 October 2000

“Birth of a myth”: the DS 19 as seen by L'Auto-Journal (2013)

2013

“The prophecy of Paul Magès”: PSA's Hybrid Air as seen by Le Progrès de Lyon (2013)

2013

Letter from Éditions LVA authorising the reproduction of the Brioult chapter on Paul Magès

3 April 2013

Paul Magès (1908-1999): biographical notice of the inventor of the hydropneumatic suspension

2019