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
Authorizing the withdrawal of 12 sets of Dynamo Brushes from production stock.3rd Feb 1939Box 166 \ 2  img248
Regulator part sent to the makers for examination.24th Feb 1939Box 166 \ 2  img249
Correspondence regarding a dynamo fault and potential solder melting point issue on Chassis No. 3.BT-65 for a Mr. Denis Becker.5th Apr 1939Box 166 \ 2  img250
Letter to Joseph Lucas Ltd. detailing the results of tests on six RR1 type regulators.12th May 1939Box 166 \ 2  img251
Page two of a letter to Joseph Lucas Ltd. regarding issues with unit performance during a heating run.12th May 1939Box 166 \ 2  img252
Test results for six Lucas RR.1 type regulators, tested against a specific specification.18th Jan 1939Box 166 \ 2  img253
Sourcing C.A.V. type regulators for the last 40 Wraith cars.22th Aug 1939Box 166 \ 2  img254
The Lucas regulator on the Dash Ripplet.12th Mar 1940Box 166 \ 2  img255
Technical description and diagram of the 'Newtons' voltage regulator, with comparisons to other types.15th Apr 1941Box 166 \ 2  img256
Cover note for the attached production test specification for a 20/25 Switchbox.20th Oct 1931Box 166 \ 3  img001
Specification of test for a 20/25 switchbox.16th Oct 1931Box 166 \ 3  img002
Set of instructions for testing electrical circuits and connections using switches and terminals.26th Oct 1932Box 166 \ 3  img003
Parts list and instructions for modifying the switchbox to isolate the ignition on 20/25 HP and Peregrine II models.26th Oct 1932Box 166 \ 3  img004
Alteration 737/Dss for the 20/25 and Peregrine II switchbox.15th Nov 1932Box 166 \ 3  img005
Alteration notice for the Peregrine II and 20/25 HP switchbox used with a C.A.V. Regulator.18th Nov 1932Box 166 \ 3  img006
Difficulties and potential solutions for isolating starter motor circuits on Phantom II and 20/25 models.1st Dec 1932Box 166 \ 3  img007
Confirming the proposed design for the Peregrine switchbox and instrument patch.16th Dec 1932Box 166 \ 3  img008
The design of a new switch-box to prevent battery discharge on various models.28th Dec 1932Box 166 \ 3  img009
Outlining five points of concern regarding a vehicle's wiring diagram.28th Dec 1932Box 166 \ 3  img010
Suggestion for the operation of the ignition switch to include a warning lamp indicating the key has not been turned off.28th Dec 1932Box 166 \ 3  img011
Features and development of a grouped instrument panel for the Peregrine.11th Jan 1933Box 166 \ 3  img012
Suggestion to use an improved scheme on both the Peregrine and 20/25 car models.8th Dec 1933Box 166 \ 3  img013
Request to overhaul a switchbox on vehicle 20-EX due to a faulty dynamo contact.8th Dec 1933Box 166 \ 3  img014
Design and functionality of a new switchbox, including alterations for dual ignition.16th Feb 1934Box 166 \ 3  img015
Estimated cost saving of 30 shillings for a new switchbox design.19th Feb 1934Box 166 \ 3  img016
Confirming a cost saving of 30 shillings per chassis resulting from a new switchbox design.20th Feb 1934Box 166 \ 3  img017
Querying contradictions in the operation of a switchbox, specifically regarding the starter circuit, parking lights, and instrument board lights.22th Feb 1934Box 166 \ 3  img018
Follow-up request for a reply to queries regarding a switchbox.5th Mar 1934Box 166 \ 3  img019
Technical memorandum replying to queries about the functionality of a vehicle's switchbox.7th Mar 1934Box 166 \ 3  img020
Concluding that a scheme to reduce illumination by halving the current is not justified by the result.7th Mar 1934Box 166 \ 3  img021
Design of the instrument panel switchbox and a new walnut panel layout.14th Mar 1934Box 166 \ 3  img022
Progress and model availability of the Spectre Switchbox.18th Jul 1934Box 166 \ 3  img023
Examination and test report on the first Spectre Switchbox, providing suggestions for improvement.31th Jul 1934Box 166 \ 3  img024
Technical report on observed weaknesses and proposed modifications to electrical contacts, including a dynamo circuit sparking test.31th Jul 1934Box 166 \ 3  img025
Recommendations for improvements to starter switch contacts and ignition switch levers.31th Jul 1934Box 166 \ 3  img026
Standardisation of parts report for a Switchbox to D.54325.21th Aug 1934Box 166 \ 3  img027
The deterioration of rubber sleeves on switchbox terminals with a suggestion for a replacement material.7th Sep 1934Box 166 \ 3  img028
Requesting the construction of a switchbox for the 'Spectre' chassis, listing required parts.17th Sep 1934Box 166 \ 3  img029
Continuation page of a parts list detailing drawing numbers, part names, and a note for the Pattern Shop.17th Sep 1934Box 166 \ 3  img030
Parts list for the 'Spectre' 31.EX Switchbox, section 8160, detailing components and their drawing numbers.13th Dec 1934Box 166 \ 3  img031
Continuation list of drawing numbers and their corresponding part names.13th Dec 1934Box 166 \ 3  img032
Listing part numbers for the 'Spectre' 31.EX switchbox, section 8160.13th Dec 1934Box 166 \ 3  img033
List of parts for Switchbox Section 8160, 'Spectre' 31.EX, R.R.Scheme 781.18th Dec 1934Box 166 \ 3  img034
Listing additional parts required for the 'Spectre' 21.EX Switchbox.27th Dec 1934Box 166 \ 3  img035
Confirmation of required parts for the 'Spectre' 31.EX Switchbox, specifically a Brush Stamping, and a note regarding blueprints.2nd Jan 1935Box 166 \ 3  img036
Request to put in hand a Switchbox Flex Flange for a 'Spectre' III to match new dashboard castings.27th Mar 1935Box 166 \ 3  img037
Experimental department report on bench tests of a Spectre switchbox.2nd May 1935Box 166 \ 3  img038
Bench test report on a modified Spectre switchbox to assess current carrying capacity and volt drop.2nd May 1935Box 166 \ 3  img039
The production specification for inspection and test of the Phantom III switchbox.29th Nov 1935Box 166 \ 3  img040
Specification for the inspection, adjustment, and testing of the switchbox for the Phantom III model.26th Nov 1935Box 166 \ 3  img041
Procedure for testing the correctness of switching operations.16th Feb 1937Box 166 \ 3  img042
Instruction to trial rubber tubing as a substitute for flexible metal tubing for the switchbox wiring conduit on Chassis 36 Ex.16th Feb 1937Box 166 \ 3  img043
The replacement of metallic flexible tubing with a rubber tube for the switchbox on Phantom III & 25/30 HP models.18th Feb 1937Box 166 \ 3  img044
Requesting the fitting of a new switchbox to Chassis 35-EX.2nd Jul 1937Box 166 \ 3  img045
Request for parts to be made for a modification to a PH.III switchbox push button.2nd Jul 1937Box 166 \ 3  img046
Notification about new blueprints for Wraith III switchbox parts suitable for the Lucas L.R.7.T. Regulator.15th Jul 1937Box 166 \ 3  img047
Request for carbon contacts for 'Phantom III' switchbox experiments to prevent breakages.14th Aug 1937Box 166 \ 3  img048
Modification to a Phantom III starter switch, including a list of new parts required for testing.24th Aug 1937Box 166 \ 3  img049
Modification to the Starter Switch for Phantom III and 25/30 HP models to improve the connection of the carbon contacts.26th Aug 1937Box 166 \ 3  img050
Request for a new experimental switchbox for a Bentley chassis, detailing the parts and intended chassis.8th Sep 1937Box 166 \ 3  img051
Requesting a slight modification to the switchbox on car 36.EX.11th Sep 1937Box 166 \ 3  img052
Switchbox modification for the Wraith and other models, adding a short-circuiting device for the ballast resistance.4th May 1938Box 166 \ 3  img053
The replacement of switchbox components with new parts and associated blueprints.19th Apr 1939Box 166 \ 3  img054
List of modifications required to improve the action of the lighting and ignition switches for specific Bentley chassis.20th Apr 1939Box 166 \ 3  img055
Instructions detailing a change of lever type, cancellation of a previous memo, and distribution of switches for testing.20th Apr 1939Box 166 \ 3  img056
Confirmation memo regarding the handover of blueprints for a Bentley V Lighting Switch Lever.25th Apr 1939Box 166 \ 3  img057
10,000 miles test for the New Phantom, addressing oil damage to a cable.25th Jan 1925Box 166 \ 4  img001
Requesting an update on electrical failures during a 10,000-mile test.20th Nov 1925Box 166 \ 4  img002
Correct lamp bulbs for the 40/50 New Phantom, 20 HP, and Silver Ghost models.9th Dec 1925Box 166 \ 4  img003
Chassis 10-GIII after 2948 miles, detailing issues and performance of the electrical fittings.12th Apr 1926Box 166 \ 4  img004
Letter from coachbuilder Hooper & Co. regarding the supply of lamps and a horn for a Saloon Cabriolet on chassis No.10-G3.15th Jul 1927Box 166 \ 4  img005
Request to coachbuilders Messrs. Hoopers to supply headlamps and wing lamps for a 30 HP car.19th Jul 1927Box 166 \ 4  img006
Compromise for the position of headlamps on the 20 HP model due to a higher radiator.19th Jun 1928Box 166 \ 4  img007
The front and rear wheel clearances for the India 3 model.26th Jun 1923Box 166 \ 4  img008
New headlamp supports for the 20 HP chassis due to a higher radiator.10th Jul 1928Box 166 \ 4  img009
Fitting a Stephan Grebal spot light, a smaller headlamp, and Chrysler type wing lamps.16th Jul 1928Box 166 \ 4  img010
Standardisation of headlamp positions on the 20 HP Chassis.16th Jul 1928Box 166 \ 4  img011
Height and appearance of headlamps on a 20 HP Chassis.9th Jul 1928Box 166 \ 4  img012
Arrangement, types, and switching of lamps for the 12-G-4 model.17th Jul 1928Box 166 \ 4  img013
Proposal to use a Bosch changeover foot switch for headlight control on a Barkerlite Coupe.19th Jul 1928Box 166 \ 4  img014
Correspondence approving the improved headlamp position for the 20 HP Chassis.31th Jul 1928Box 166 \ 4  img015
Correspondence regarding the supply of suitable headlamps for the 20 HP chassis from Joseph Lucas Ltd.18th Sep 1928Box 166 \ 4  img016
Letter from Joseph Lucas Ltd regarding the supply and testing of Lucas R.160.S lamps for the 20 HP Chassis.17th Sep 1928Box 166 \ 4  img017
Standardisation of chassis parts concerning the raising of 20 HP headlamps.3rd Sep 1928Box 166 \ 4  img018
Form for tracking the introduction and costs of a new standardized chassis part.2nd Sep 1928Box 166 \ 4  img019
Potential standardisation of the new large Lucas headlamp, type RB.160, for the 20 HP car.1st Oct 1928Box 166 \ 4  img020
Requesting a report on the testing of Lucas R.160.S type headlamps for the 20 HP chassis.1st Oct 1928Box 166 \ 4  img021
Choice of lamps for the 20 HP and 40/50 models.4th Oct 1928Box 166 \ 4  img022
Standardisation of headlamps, comparing Lucas P.100 and RB-160 models.1st Oct 1928Box 166 \ 4  img023
Typed memo concerning the standardisation of a new R.160.S headlamp for the 20 HP car.10th Oct 1928Box 166 \ 4  img024
Communication regarding Joseph Lucas Limited's development of smaller P.100 headlamps for the 20 HP chassis.25th Oct 1928Box 166 \ 4  img025
Standardization of headlamps for the 20 HP chassis.26th Oct 1928Box 166 \ 4  img026
Letter to Messrs. Lucas inquiring about modifications made to the 160.S. lamp for the 20 HP car.29th Oct 1928Box 166 \ 4  img027
Instructions regarding the fitting of lamps for a Barkerlite Coupe and a Hooper Sedanca.7th Nov 1928Box 166 \ 4  img028
Extract detailing the specifications for headlamp brackets and Lucas headlamps with electrical dipping reflectors for chassis 12-G4.30th Nov 1928Box 166 \ 4  img029
Design and fitting of a single wheel carrier for the rear of a vehicle.3rd Dec 1928Box 166 \ 4  img030
Responding to a telegram about a delay in sending a Bosch two-way switch for an experimental car.8th Dec 1928Box 166 \ 4  img031
List of accessories for a Closed Coupled All Weather Barker, model 16-G-4.8th Dec 1928Box 166 \ 4  img032
Reporting the breaking of front wing stays on a 20 HP car due to the weight of the headlamps.3rd Jan 1929Box 166 \ 4  img033
Design specifications for a G.4. close coupled four-seater allweather car, covering aspects from body dimensions to colour schemes.1st Feb 1929Box 166 \ 4  img034


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