Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
Letter to The Adamant Engineering Co. regarding the specifications and testing of a new steering cam.2nd Nov 1934Box 28 \ 3  Scan036
Letter from Adamant Engineering Company acknowledging receipt of a letter and awaiting a gear.3rd Nov 1934Box 28 \ 3  Scan037
Letter from Adamant Engineering Company regarding a meeting to discuss a change in steering gear ratio.7th Nov 1934Box 28 \ 3  Scan038
Letter to Adamant Engineering Co. Ltd. arranging a meeting to discuss altering a steering ratio and the manufacture of Marles steering.6th Nov 1934Box 28 \ 3  Scan039
General arrangement of a Marles Steering Gear, RH 1 7/8 type.16th Mar 1934Box 28 \ 3  Scan040
Letter from The Rover Company Ltd regarding steering gear particulars.10th Nov 1934Box 28 \ 3  Scan041
Letter from Burman & Sons Ltd. regarding the technical particulars of the Burman-Douglas Steering Gear.9th Nov 1934Box 28 \ 3  Scan042
Manual for the Burman Douglas Steering Gear.10th Nov 1934Box 28 \ 3  Scan043
The reversal rig test of a Marles Steering Column Ex.16005.10th Nov 1934Box 28 \ 3  Scan044
Arrangement drawing for a Rover 1 inch steering gear.15th Oct 1934Box 28 \ 3  Scan045
Letter to Messrs. Burman & Sons Ltd. requesting further details about their steering gear, specifically its efficiency and helix angle.12th Nov 1934Box 28 \ 3  Scan046
Letter to The Rover Co. Ltd. regarding details of Burman-Douglas steering.12th Nov 1934Box 28 \ 3  Scan047
Letter to The Adamant Engineering Co. Ltd. regarding the testing and efficiency of a Marles type L.7 steering gear on a 25 HP chassis.13th Nov 1934Box 28 \ 3  Scan048
Letter from Adamant Engineering Company discussing the gear ratio and efficiency of the L7 Gear for Marles-Weller steering gears.14th Nov 1934Box 28 \ 3  Scan049
Letter from Adamant Engineering discussing steering gear ratios and helix angles.14th Nov 1934Box 28 \ 3  Scan050
The modification of a Marles Type L.7 Steering Gear by the Adamant Engineering Co.14th Nov 1934Box 28 \ 3  Scan051
Request to manufacture a new, shorter pendulum lever for the Marles Steering Gear on Chassis 21-G-IV.15th Nov 1934Box 28 \ 3  Scan052
Research into Marles steering for the Spectre project, comparing it with La Salle steering.16th Nov 1934Box 28 \ 3  Scan053
Comparing steering gear efficiency, discussing component manufacturing, and proposing tests for the Spectre model.16th Nov 1934Box 28 \ 3  Scan054
The mechanical efficiency of a Marles Type L.7 Steering Gear for 25 HP.15th Nov 1934Box 28 \ 3  Scan055
The mechanical efficiency tests of the Marles Type L.7 steering gear on chassis 21-G-IV.18th Nov 1934Box 28 \ 3  Scan056
The necessity of a long pendulum lever for the Marles type steering gear.15th Nov 1934Box 28 \ 3  Scan057
Calculations for the approximate helix angle of 'La Salle' and 'Marles Type L.7' steering gears.15th Nov 1934Box 28 \ 3  Scan058
Blank page with a 'PRINT ROOM' stamp from Derby.15th Nov 1934Box 28 \ 3  Scan059
Graph showing the mechanical efficiency of a La Salle steering system against load.16th Nov 1934Box 28 \ 3  Scan060
Blank page with a purple stamp from the Print Room in Derby.16th Nov 1934Box 28 \ 3  Scan061
Graph showing the mechanical efficiency of a Marles Type L.7 steering gear.13th Nov 1934Box 28 \ 3  Scan062
Cover or backing sheet stamped by the Print Room.15th Nov 1934Box 28 \ 3  Scan063
Comparison of the outlines of Marles Type L.7 and Gemmer Model 330 steering gears.18th Nov 1924Box 28 \ 3  Scan064
Blueprint of a left-hand steering assembly with a ratio of 20.25 to 1.1st May 1939Box 28 \ 3  Scan065
Letter from Burman & Sons Ltd. discussing the specifications of a Burman-Douglas steering gear.14th Nov 1934Box 28 \ 3  Scan066
Letter from Burman & Sons, Ltd. regarding comparative gear efficiency.14th Dec 1934Box 28 \ 3  Scan067
Internal request to place an order with Adamant Engineering Co. for a modified experimental steering gear.16th Nov 1934Box 28 \ 3  Scan068
Letter to Adamant Engineering Co. Ltd. detailing the specifications for a new Type L.7 R.H. steering gear for a 25 HP chassis.16th Nov 1934Box 28 \ 3  Scan069
Letter discussing the use of a special oil for testing and running in an L.7 gear.19th Nov 1934Box 28 \ 3  Scan070
Letter from Adamant Engineering Company regarding the production of an L7 Gear, a drop arm, and gear oil.19th Nov 1934Box 28 \ 3  Scan071
Page two of a letter from Adamant Engineering Company Limited.19th Nov 1934Box 28 \ 3  Scan072
Letter to Cadillac Motor Car Co. inquiring about the advantages of American-style steering gears.19th Nov 1934Box 28 \ 3  Scan073
Capacity of a Saginaw steering gear and requesting specifications for Cadillac and La Salle steering cams.19th Nov 1934Box 28 \ 3  Scan074
Ordering and fitting of a Marles Steering Gear and the fabrication of pendulum levers for chassis GUB-V.19th Nov 1934Box 28 \ 3  Scan075
Helix angle of Cadillac steering and comparing its shock immunity to La Salle steering.22th Nov 1934Box 28 \ 3  Scan076
Urgent request via telegram to Adamant in Luton for a second L.7 gear.28th Nov 1934Box 28 \ 3  Scan077
Telegram received by telephone regarding the dispatch of a 'second LY gear'.28th Nov 1934Box 28 \ 3  Scan078
Development of the Spectre steering system, referencing Cadillac and La Salle steering.3rd Dec 1934Box 28 \ 3  Scan079
Comparison table of data for various types of 25 HP steering gear.7th Jan 1935Box 28 \ 3  Scan080
Comparison table of specifications for various types of steering gear.7th Jan 1935Box 28 \ 3  Scan081
Mechanical efficiency test results for a Marles Weller Q Type Steering Gear.11th Dec 1934Box 28 \ 3  Scan082
Note on the efficiency of steering gears and the time taken for an oil film to squash out under load.11th Dec 1934Box 28 \ 3  Scan083
Modifications for the Spectre Marles type steering column and a related clearance issue.14th Dec 1934Box 28 \ 3  Scan084
Follow-up letter to Adamant Engineering Co. Ltd. regarding the progress on a double tooth type steering for a Bentley and a new large hourglass worm steering gear.31th Dec 1934Box 28 \ 3  Scan085
Letter from Adamant Engineering Company acknowledging a letter concerning steerings.4th Jan 1935Box 28 \ 3  Scan086
Despatch of a Pendulum Lever to the Adamant Engineering Co. for splining.1st Jan 1935Box 28 \ 3  Scan087
Data table comparing different types of 25 HP steering gear.7th Jan 1935Box 28 \ 3  Scan088
Comparison table of specifications for different types of steering gear.7th Jan 1935Box 28 \ 3  Scan089
Request to fit a side steering tube with limited movement and increased set up load on Wor's car.18th Jan 1935Box 28 \ 3  Scan090
The lower ratio Marles type steering on Wor's car.2nd Feb 1935Box 28 \ 3  Scan091
Letter to The Adamant Engineering Co. Ltd. regarding the modification of a steering part.4th Feb 1935Box 28 \ 3  Scan092
Letter from Adamant Engineering Company regarding arrangements for gear parts.5th Feb 1935Box 28 \ 3  Scan093
Letter to Adamant Engineering Co. Ltd. confirming arrangements for steering parts.6th Feb 1935Box 28 \ 3  Scan094
Taking a steering gear from car 21-G-IV to the Marles Company to have the ratio changed.7th Feb 1935Box 28 \ 3  Scan095
Letter from Adamant Engineering Company regarding the supply of Cams and Rollers for order 75967, and a note on a centre bore issue.8th Feb 1935Box 28 \ 3  Scan096
Letter from Adamant Engineering Company confirming a meeting with Mr. Robotham.7th Feb 1935Box 28 \ 3  Scan097
Copy of a telegram confirming despatch of parts for order 75967.7th Feb 1935Box 28 \ 3  Scan098
Letter to The Adamant Engineering Co. Ltd. outlining decisions on a double tooth gear for a Bentley.11th Feb 1935Box 28 \ 3  Scan099
Typed letter clarifying specifications for a steering gear part and confirming an upcoming order.11th Feb 1935Box 28 \ 3  Scan100
Request to pass an official order to The Adamant Engineering Co. Ltd. for a Double Tooth Steering Gear for a Bentley.12th Feb 1935Box 28 \ 3  Scan101
The requirements for fitting a Marles steering gear to a Bentley chassis.12th Feb 1935Box 28 \ 3  Scan102
Modifications required for Marles and Peregrine steering tubes.12th Feb 1935Box 28 \ 3  Scan103
Letter from Adamant Engineering Company regarding L7 Gears, related drawings, and an upcoming meeting.16th Feb 1935Box 28 \ 3  Scan104
Letter from Adamant Engineering Company confirming an appointment to discuss L.7 Steering parts.15th Feb 1935Box 28 \ 3  Scan105
Letter from Adamant Engineering Company regarding specifications and arrangements for a steering gear order.12th Feb 1935Box 28 \ 3  Scan106
Letter from Adamant Engineering Company Limited concerning 3 special Cams and Rollers they supplied.12th Feb 1935Box 28 \ 3  Scan107
Letter to Adamant Engineering Co. Ltd. requesting an L.7 type Steering Gear for examination and potential standardisation on the 25 HP chassis.15th Feb 1935Box 28 \ 3  Scan108
Letter requesting the production of a third L.7 type R.H. Gear with four specific modifications.15th Feb 1935Box 28 \ 3  Scan109
Requesting an official order be sent for L.7 type R.H. Steering Gear for Sg's car.15th Feb 1935Box 28 \ 3  Scan110
Requesting the fitment of a Marles L.7 steering gear to a 25 HP car, chassis GLG-5, with modification details.15th Feb 1935Box 28 \ 3  Scan111
Letter to Adamant Engineering concerning the standardisation and modification of L.7 type steering gear for a 25 HP chassis.15th Feb 1935Box 28 \ 3  Scan112
Page 2 of a letter detailing requirements for an improvised oil filler and column projection.15th Feb 1935Box 28 \ 3  Scan113
Experimental fitting and proposed standardisation of Marles steering gear on a 25 HP model.16th Feb 1935Box 28 \ 3  Scan114
General arrangement of Marles Steering Gear L7 Type RH.24th Apr 1930Box 28 \ 3  Scan115
General arrangement of Marles Steering Gear, L.7. Type R.H.3rd Jul 1934Box 28 \ 3  Scan116
Standardising the Marles steering on the 20/25 chassis.15th Feb 1935Box 28 \ 3  Scan117
Comparison and proposal for standardizing Marles steering on the 20/25 model.20th Feb 1935Box 28 \ 3  Scan118
Comparison of a standard steering column with a proposed Marles column, detailing design, materials, and weight.20th Feb 1935Box 28 \ 3  Scan119
Comparison table of specifications for two different steering gear systems, the Standard 20/25 and the 20/25 Marles.21th Feb 1935Box 28 \ 3  Scan120
Disappointing mechanical efficiency results of the Marles steering gear on the 21-G-IV chassis.21th Feb 1935Box 28 \ 3  Scan121
Graph showing the mechanical efficiency of a Marles Type L7 steering gear under forward and reverse drive.27th Feb 1935Box 28 \ 3  Scan122
Blank document page with a purple ink stamp from the Print Room in Derby.28th Feb 1935Box 28 \ 3  Scan123
Graph showing the mechanical efficiency of a Marles Type L.T steering gear after a 7-hour test run.13th Nov 1934Box 28 \ 3  Scan124
Graph showing the mechanical efficiency of a Marles Type L7 steering column under different loads.12th Oct 1934Box 28 \ 3  Scan125
Updating the outside diameter dimension for the Double Tooth Marles Steering box cover on a Bentley chassis.21th Feb 1935Box 28 \ 3  Scan126
Mechanical efficiency of the Marles steering gear on the 21-G-IV model.21th Feb 1935Box 28 \ 3  Scan127
Letter to Adamant Engineering Co. Ltd. requesting a detail print for a steering gear top cover part M.20718 for a Bentley.28th Feb 1935Box 28 \ 3  Scan128
Invoice received from Adamant Engineering Co. Ltd. for steering gear components.1st Mar 1935Box 28 \ 3  Scan129
Letter from Adamant Engineering Company, Limited regarding blueprints M.20718 and MGA.20620B for a special Top Cover and gear assembly.1st Mar 1935Box 28 \ 3  Scan130
Modifications to the Marles type steering for the 20/25 HP chassis, intended for Adamant Engineering Co.4th Mar 1935Box 28 \ 3  Scan131
Stop-work order concerning alterations to Marles type steering parts for the 20/25 HP Chassis.6th Mar 1935Box 28 \ 3  Scan132
Authorising payment for an invoice from the Adamant Engineering Co.8th Mar 1935Box 28 \ 3  Scan133
Note concerning letters and booklets for Marles Steering Gear received from Adamant Engineering Co. Ltd.9th Mar 1935Box 28 \ 3  Scan134
Letter from Adamant Engineering Company regarding the supply and distribution of instruction booklets for steering gears.7th Mar 1935Box 28 \ 3  Scan135


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