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
Further tests on a Bishop steering gear with an altered velocity ratio, detailing forward and reverse efficiency.17th May 1933Box 28 \ 2  Scan178
Follow-up letter from Adamant Engineering Company regarding suggestions for a Sports Bentley.17th May 1933Box 28 \ 2  Scan179
Dimensions and requirements for fitting a Marles Weller steering box and pendulum lever to a Bentley chassis.18th May 1933Box 28 \ 2  Scan180
Letter to Adamant Engineering Co Ltd discussing the feasibility and gear ratios for fitting a J.2. type steering to a Bentley vehicle.18th May 1933Box 28 \ 2  Scan181
Page 2 of a letter to The Adamant Eng. Co. Ltd. regarding pendulum levers and steering box options.19th May 1933Box 28 \ 2  Scan182
Letter from Adamant Engineering Co. Ltd. regarding the receipt of a Drop Arm for which no instructions were received.19th May 1933Box 28 \ 2  Scan183
Letter from Adamant Engineering Company discussing the feasibility and characteristics of manufacturing a special steering gear cam.20th May 1933Box 28 \ 2  Scan184
Letter discussing gear design alternatives, including helix angles, gear ratios, and rockershaft dimensions.20th May 1933Box 28 \ 2  Scan185
Letter from Adamant Engineering Company Limited regarding a 6¾' drop arm and a proposed meeting at the Derby works.20th May 1933Box 28 \ 2  Scan186
Letter to The Adamant Engineering Co. arranging a visit.22th May 1933Box 28 \ 2  Scan187
Letter from Adamant Engineering Company, Ltd. to arrange a meeting at the Rolls-Royce works.23th May 1933Box 28 \ 2  Scan188
Internal memorandum discussing the performance and cost issues of a new steering design and recommending alternatives.23th May 1933Box 28 \ 2  Scan189
Letter to The Adamant Engineering Co. Ltd confirming an appointment with Commander Matravers.24th May 1933Box 28 \ 2  Scan190
Drawing of a Marles-Weller J Type steering box, drawing GA 2450, adapted for a Bentley chassis.19th May 1935Box 28 \ 2  Scan191
Diagram illustrating the angular movement of a drop arm for a Marles steering box on a Bentley.18th May 1933Box 28 \ 2  Scan192
Efficiency tests on a Marles Weller type steering worm and nut using different lubricants.24th May 1933Box 28 \ 2  Scan193
Technical memorandum discussing issues with fitting Marles Weller steering components and proposing alternative damping solutions.24th May 1933Box 28 \ 2  Scan194
Note on American self-damping steering boxes and the potential for axle flutter at Brooklands.24th May 1933Box 28 \ 2  Scan195
Letter from Adamant Engineering Company, Limited confirming an appointment.25th May 1933Box 28 \ 2  Scan196
General arrangement of Marles Steering Gear L7 type RH.24th Apr 1930Box 28 \ 2  Scan197
Letter from Adamant Engineering Company regarding a 'J' Type Marles-Weller Steering Gear order.13th Jun 1933Box 28 \ 2  Scan198
Letter from CAM GEARS LTD. concerning the cost and invoicing of a special Bishop Steering Gear sample.15th Jun 1933Box 28 \ 2  Scan199
Letter to The Adamant Engineering Co. discussing steering gear for Bentley and Phantom models.15th Jun 1933Box 28 \ 2  Scan200
Letter to The Adamant Eng. Co. regarding the fitting of a Marles steering gear to a Bentley chassis.15th Jun 1933Box 28 \ 2  Scan201
Report on a Marles Weller steering gear before installation.15th Jun 1933Box 28 \ 2  Scan202
Letter to Cam Gears Ltd. regarding a Bishop Steering Gear, agreeing to a price and mentioning upcoming road tests.16th Jun 1933Box 28 \ 2  Scan203
Letter from Adamant Engineering Company regarding the supply and specifications of Marles steering gear components for a Bentley car.16th Jun 1933Box 28 \ 2  Scan204
Letter from Adamant Engineering Company suggesting a rockershaft movement for fitting a Marles Gear.16th Jun 1933Box 28 \ 2  Scan205
The acquisition of a 'Bishop' steering system for improvement purposes.20th Jun 1933Box 28 \ 2  Scan206
Issues with the Marles Weller steering system and considering it the worst feature on the big car.19th Jun 1933Box 28 \ 2  Scan207
Letter from Cam Gears Ltd. regarding an invoice for a sample steering gear and upcoming road tests.19th Jun 1933Box 28 \ 2  Scan208
The condition of a Marles Weller steering system after a 50-hour bumper test, noting a slight crack but continued functionality.21th Jun 1933Box 28 \ 2  Scan209
Letter from Adamant Engineering Company regarding a delay in dispatching a steering gear and a missing Drop Arm.22th Jun 1933Box 28 \ 2  Scan210
Requesting the dismantling of a Marles Weller steering unit from car 20-EX for inspection and return.23th Jun 1933Box 28 \ 2  Scan211
Letter to Adamant Engineering Co Ltd. regarding the modification and issues with steering components.23th Jun 1933Box 28 \ 2  Scan212
Letter from Adamant Engineering Company regarding modifications and parts for steering gears, including a bent back plate.26th Jun 1933Box 28 \ 2  Scan213
Letter to Adamant Engineering Co. Ltd. thanking them for the prompt dispatch of a shorter drop arm.27th Jun 1933Box 28 \ 2  Scan214
Letter from Adamant Engineering confirming the dispatch of drop arms for a Bentley car.29th Jun 1933Box 28 \ 2  Scan215
Examination report on the poor finish of a Marles-Weller 20-EX steering component, suggesting alternative manufacturing methods.6th Jul 1933Box 28 \ 2  Scan216
Diagram showing cracks and chipping in contact pads on a Marles Weller steering system.28th Jun 1933Box 28 \ 2  Scan217
Two invoices received from Adamant Engineering Co. without a corresponding purchase order.6th Jul 1933Box 28 \ 2  Scan218
Letter to Adamant Engineering concerning a steering conversion for a Phantom and issues with cracked hemispheres.6th Jul 1933Box 28 \ 2  Scan219
Examination report on the poor finish and manufacturing method of a Marles-Weller steering system.6th Jul 1933Box 28 \ 2  Scan220
Diagram illustrating cracks and chipping on contact pads for a Maples Weller steering system on a 20 Ex Chassis.28th Jun 1933Box 28 \ 2  Scan221
Letter from Adamant Engineering Company acknowledging receipt of a letter and an Inspector's report, and awaiting a gear for examination.7th Jul 1933Box 28 \ 2  Scan222
Confirming the satisfactory fitting of a 'J' type steering gear and authorising invoice payment.11th Jul 1933Box 28 \ 2  Scan223
Dispatch instructions for sending a Marles Weller Steering part for examination to Adamant Engineering Co. Ltd.15th Jul 1933Box 28 \ 2  Scan224
Advice note from Adamant Engineering Company, Ltd. acknowledging receipt of a returned steering gear.18th Jul 1933Box 28 \ 2  Scan225
Letter from Adamant Engineering Company regarding alterations to a steering gear cam ratio and a smaller steering sample for a Bentley.23th Aug 1933Box 28 \ 2  Scan226
Letter from the Experimental Department to Adamant Engineering regarding steering performance on Bentley and Phantom models.2nd Sep 1933Box 28 \ 2  Scan227
Letter from Cam Gears Ltd. requesting a report on the testing of a sample Bishop Steering Gear.8th Sep 1933Box 28 \ 2  Scan228
Letter from Adamant Engineering Company regarding a sample of Vacuum Mobiloil lubricant for steering gears.7th Sep 1933Box 28 \ 2  Scan229
Letter from Adamant Engineering Company discussing the suitability of Marles vs. Marles-Weller steering gears for Bentley and Phantom cars.8th Sep 1933Box 28 \ 2  Scan230
Letter from Adamant Engineering Company regarding steering box oil viscosity and hemisphere cracking on a Bentley car.8th Sep 1933Box 28 \ 2  Scan231
General arrangement of Marles steering gear L7 type RH.24th Apr 1930Box 28 \ 2  Scan232
Letter to Adamant Engineering Co. Ltd. discussing steering gear tests for Bentley and Phantom models.20th Sep 1933Box 28 \ 2  Scan233
Letter from Adamant Engineering Company regarding steering gears for Bentley and Phantom models.27th Sep 1933Box 28 \ 2  Scan234
Letter from the Experimental Department inviting an engineer to test drive a Bentley to demonstrate its worm and nut steering system.29th Sep 1933Box 28 \ 2  Scan235
Letter from Adamant Engineering Company to W. A. Robotham regarding an invitation to drive a Bentley car.30th Sep 1933Box 28 \ 2  Scan236
Letter from Cam Gears Ltd. regarding a visit to discuss a sample steering gear.24th Nov 1933Box 28 \ 2  Scan237
Letter from Adamant Engineering Company requesting the date of first use of an oscillating ball bearing assembly for patent negotiations.15th Dec 1933Box 28 \ 2  Scan238
Letter to The Adamant Engineering Co. regarding a query on a steering column thrust race.20th Dec 1933Box 28 \ 2  Scan239
Three blueprints for a spherical ball bearing in the steering gear unit.21th Dec 1933Box 28 \ 2  Scan240
Letter to Adamant Engineering Co. Ltd. providing blueprints and details for early steering components.22th Dec 1933Box 28 \ 2  Scan241
Letter from Adamant Engineering Company acknowledging receipt of a letter and enclosures from W.A. Robotham.27th Dec 1933Box 28 \ 2  Scan242
Letter from Adamant Engineering Company Ltd. to W.A. Robotham regarding the receipt of letters and drawings.9th Jan 1934Box 28 \ 3  Scan001
Letter from Cam Gears Ltd. following up on the testing of a Bishop Patent Steering Gear.1st May 1934Box 28 \ 3  Scan002
Letter to The Adamant Engineering Co. Ltd. requesting a drawing for a smaller 'Marles' type steering box for an Experimental 25 HP car.12th Sep 1934Box 28 \ 3  Scan003
Letter from Adamant Engineering Company regarding the suitability of a D.7 Marles steering gear for an experimental 25-HP car.13th Sep 1934Box 28 \ 3  Scan004
General arrangement of a Marles D7 Type PH steering gear assembly.15th Jul 1930Box 28 \ 3  Scan005
Order to be placed with Adamant Engineering Co. for a Marles Steering component.17th Sep 1934Box 28 \ 3  Scan006
Instructions for fitting a Marles steering column to a 20/25 HP chassis and an urgent request for a pendulum lever.17th Sep 1934Box 28 \ 3  Scan007
Decision to replace an unsatisfactory La Salle steering with a Marles gear and a request for sketches of adapting pieces.17th Sep 1934Box 28 \ 3  Scan008
Letter to Adamant Engineering Co. Ltd. regarding the replacement of a D.7 size steering column with a larger L.7 size on a 25 HP chassis.17th Sep 1934Box 28 \ 3  Scan009
Letter discussing requirements for attaching a steering column to a Marles box and requesting further prints.17th Sep 1934Box 28 \ 3  Scan010
Letter from Adamant Engineering Company confirming a verbal order for a Marles Steering Gear for an experimental 25-HP chassis.17th Sep 1934Box 28 \ 3  Scan011
To Roy regarding a price correction on an invoice for Adamant Steering.18th Sep 1934Box 28 \ 3  Scan012
Letter from Adamant Engineering Company regarding the fitment of a steering box to a 25-HP chassis.18th Sep 1934Box 28 \ 3  Scan013
Page two of a letter from Adamant Engineering Company Limited regarding a standard L7 R.H. Steering Column print.18th Sep 1934Box 28 \ 3  Scan014
General arrangement of Marles Steering Gear L7 Type RH.24th Apr 1930Box 28 \ 3  Scan015
Telegram from Robotham to Carlton-Smith enquiring about the dispatch of a Marles steering component.21th Sep 1934Box 28 \ 3  Scan016
Telegram advising of a delayed delivery for a special box due to alterations.21th Sep 1934Box 28 \ 3  Scan017
Telegram to Adamant, Luton, regarding the dispatch of a Marles steering box.27th Sep 1934Box 28 \ 3  Scan018
Telegram received by telephone regarding a consultation with Mr. H. Royce.27th Sep 1934Box 28 \ 3  Scan019
Despatch request for a Pendulum Lever to be sent to Adamant Engineering Co.28th Sep 1934Box 28 \ 3  Scan020
Letter to Adamant Engineering Co. Ltd. regarding the dispatch of a Drop Arm for a steering box.28th Sep 1934Box 28 \ 3  Scan021
Letter from Adamant Engineering Company confirming receipt of a Drop Arm and advising it will be returned by post.29th Sep 1934Box 28 \ 3  Scan022
The mechanical efficiency of a Marles Type L.7. R.H. Steering Box.11th Oct 1934Box 28 \ 3  Scan023
Data table showing pendulum lever load, torque, wheel torque, and efficiency for forward and reverse drive.11th Jun 1934Box 28 \ 3  Scan024
Mechanical efficiency of a La Salle steering box under static conditions.11th Jun 1934Box 28 \ 3  Scan025
Letter to Adamant Engineering Co. Ltd. discussing efficiency tests on a Marles steering gear compared to an American 'Saginaw' gear.18th Oct 1934Box 28 \ 3  Scan026
Addition of friction to a steering column via a spring-loaded gland to reduce road shocks.12th Oct 1934Box 28 \ 3  Scan027
Letter from Adamant Engineering Company discussing the efficiency of the L7 steering gear and the use of needle bearings.13th Oct 1934Box 28 \ 3  Scan028
Letter from Adamant Engineering regarding the design of a steering column, specifically the addition of friction using multi-shims.13th Oct 1934Box 28 \ 3  Scan029
Letter to The Adamant Engineering Co. Ltd. regarding the efficiency testing of a gear.15th Oct 1934Box 28 \ 3  Scan030
Double-toothed Marles Steering system with Adamant Engineering Co.17th Oct 1934Box 28 \ 3  Scan031
Letter from Adamant Engineering Company regarding the 'L7' gear and efficiency tests.17th Oct 1934Box 28 \ 3  Scan032
Letter to the Adamant Engineering Co. Ltd. regarding the heavy steering of an L.7 Type Steering Gear and requesting modifications.31th Oct 1934Box 28 \ 3  Scan033
Letter from Adamant Engineering Company discussing the specifications and efficiency of L7 Marles Steering gears.1st Nov 1934Box 28 \ 3  Scan034
Letter from Adamant Engineering comparing the features and potential efficiency of Marles Gear versus Worm and Nut steering.1st Nov 1934Box 28 \ 3  Scan035


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