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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Letter from an electrical engineer regarding an 'Electric Car Traffic Indicator'.14th Jun 1934Box 166 \ 6  img019
New traffic indicator design from Messrs. Lucas.30th Aug 1934Box 166 \ 6  img020
New traffic indicator sample from Lucas, its robust construction, and issues with its non-standard bulb.31th Aug 1934Box 166 \ 6  img021
Suitability of a new traffic indicator design by Messrs. Lucas for centre pillar application.1st Sep 1934Box 166 \ 6  img022
Fitting of new Lucas direction indicators to the second Spectre vehicle.1st Nov 1934Box 166 \ 6  img023
Chasing a reply regarding improved direction indicators for the Spectre model.7th Nov 1934Box 166 \ 6  img024
The despatch of new type Lucas Direction Indicators to the Sales department.13th Nov 1934Box 166 \ 6  img025
The fitting of new Lucas Direction Indicators onto chassis 31 EX.12th Nov 1934Box 166 \ 6  img026
The despatch of new type direction indicators for experimental chassis 31-EX.17th Nov 1934Box 166 \ 6  img027
Proposal for a tell-tale light for direction indicators on the new Spectres model.30th May 1935Box 166 \ 6  img028
Optimal positioning of direction indicators on cars.20th Sep 1937Box 166 \ 6  img029
Disadvantages of a Lucas system and considering alternative controls for the steering column.20th Sep 1937Box 166 \ 6  img030
Placement and feasibility of controls for direction indicators on the steering column.6th Oct 1937Box 166 \ 6  img031
Difficulty of fitting the direction indicator control switch and sending a sample.18th Oct 1937Box 166 \ 6  img032
Alterations to the fixing plates for the Lucas Trafficator switch on the steering column for Wraith 80 and Bentley models.7th Mar 1939Box 166 \ 6  img033
Highlighting the poor performance of direction indicators and proposing a project to improve their design.10th Oct 1940Box 166 \ 6  img034
Request to determine the material of a corroding pivot bush and bearing bracket and to advise on a chromium coating.29th Jan 1941Box 166 \ 6  img035
Failures and proposed solutions for trafficator indicator arms.3rd Feb 1941Box 166 \ 6  img036
Failures and proposed solutions for trafficator indicators.3rd Feb 1941Box 166 \ 6  img037
Modifications to resolve a fault in trafficators not retracting at high speeds.4th Mar 1941Box 166 \ 6  img038
Internal memorandum requesting the purchase of Trafficator lamp bulbs for the Clan Foundry.22th May 1941Box 166 \ 6  img039
Order for two pairs of Trafficators from Joseph Lucas Ltd.19th Jun 1941Box 166 \ 6  img040
Letter to Joseph Lucas, Ltd. regarding blueprints and dimensions for a trafficator fixing plate.19th Jun 1941Box 166 \ 6  img041
Letter to Joseph Lucas, Ltd. regarding a revised drawing for a trafficator.10th Jul 1941Box 166 \ 6  img042
Unreliability of trafficators and proposed design improvements for post-war models.22th Dec 1943Box 166 \ 6  img043
Blinking light direction indicators as an alternative to the swinging arm 'trafficator' type.5th Jan 1944Box 166 \ 6  img044
The wiring and required strength of Fuse No. 6 in the Phantom II model to prevent it from burning out.1st Feb 1930Box 166 \ 7  img001
Requesting clarification on the fusing current of the supplied tinned-copper fuse-wire.12th Feb 1930Box 166 \ 7  img002
The design and operating characteristics of fuses for the Phantom II model.4th Feb 1930Box 166 \ 7  img003
Page discussing omitted headlamp arrangements on a new accessory distribution board diagram.4th Feb 1930Box 166 \ 7  img004
Reference note regarding a Cartridge type field fuse.1st Jan 1931Box 166 \ 7  img005
Test report on a tin-lead cartridge fuse to determine a suitable gauge and volt drop.6th Jun 1931Box 166 \ 7  img006
Test on a copper fuse wire, recording current, time, and voltage drop.8th Dec 1924Box 166 \ 7  img007
Request to obtain specific gauges of tin lead fuse wire for cartridge type dynamo field fuse tests.7th Jan 1931Box 166 \ 7  img008
Note on the different gauges of marked and unmarked cartridge type field fuses from experimental stock.4th Feb 1931Box 166 \ 7  img009
Use of conventional cartridge fuses in standard production.30th May 1933Box 166 \ 7  img010
Proposal to change from open type to cartridge type fuses and reduce the fuse wire gauge.31th May 1933Box 166 \ 7  img011
Problems with electrical system fuses and recommending a change to cartridge-type fuses.26th May 1933Box 166 \ 7  img012
Advantages of cartridge fuses and recommending altering the standard fuse wire gauge.26th May 1933Box 166 \ 7  img013
Details and definitions for Bakelite and Lucas cartridge type fuses.27th May 1933Box 166 \ 7  img014
Comparison of different cartridge fuse types, detailing their performance characteristics and failures.27th May 1933Box 166 \ 7  img015
Experimental results on the current carrying capacity of various cables and fuse wires.27th May 1933Box 166 \ 7  img016
Test results for wire and cartridge type fuse burnout currents at various gauges.27th May 1933Box 166 \ 7  img017
Test report on the fusing currents for various Standard Wire Gauges (S.W.G.).1st Jun 1933Box 166 \ 7  img018
Standardisation of cartridge type fuses for the electrical system.1st Jun 1933Box 166 \ 7  img019
Requesting an order for different amperage cartridge fuses from Messrs. Lucas.2nd Jun 1933Box 166 \ 7  img020
Experiments and assembly instructions for cartridge type electrical system fuses.5th Sep 1933Box 166 \ 7  img021
Technical report on the fusing and oxidizing currents of various sizes of copper fuse wire.5th Sep 1933Box 166 \ 7  img022
Comparison of R.R. and Lucas cartridge fuse types, detailing fusing currents and disadvantages.5th Sep 1933Box 166 \ 7  img023
Increasing the number of fuses in the chassis electrical system for improved safety.13th Jun 1934Box 166 \ 7  img024
Technical memorandum discussing improvements to the vehicle's fuse box and electrical cutout system.13th Jun 1934Box 166 \ 7  img025
Instructions for changes to fuse boards and circuits for cigar lighters on Phantom, Bentley, and 20/25 chassis.13th Jun 1934Box 166 \ 7  img026
Weakness of the current main fuse and considering strip type and bottle type alternatives.19th Nov 1934Box 166 \ 7  img027
Arrangement of main fuses on Bentley chassis, arguing against changing from ordinary fuse wire.21th Nov 1934Box 166 \ 7  img028
Letter from L. Weekes (Luton) Limited enquiring about the specifications for fuses requested for testing.4th Dec 1934Box 166 \ 7  img029
Letter from L. Weekes (Luton) Ltd. requesting further information in order to make a suitable offer.4th Dec 1934Box 166 \ 7  img030
Letter to Messrs. L. Weekes (Luton) Limited regarding queries on fuse currents and specifications.6th Dec 1934Box 166 \ 7  img031
Sectional drawing of a Bentley distribution board showing the position of an emergency fuse.5th Dec 1934Box 166 \ 7  img032
Blueprint for a bakelite partition and fuse assembly.5th Dec 1934Box 166 \ 7  img033
Confirming an arrangement to modify fuse caps on a distribution board.10th Dec 1934Box 166 \ 7  img034
Order to be placed with Messrs. Weekes Ltd. for one dozen glass fuses.15th Jan 1935Box 166 \ 7  img035
Letter to L. Weekes (Luton) Ltd. discussing the results of fuse testing and requesting a new batch with different specifications.15th Jan 1935Box 166 \ 7  img036
Letter from L. Weekes (Luton) Ltd. confirming the dispatch of type 45 Glass Fuses and Fuse Links for inspection and testing.15th Dec 1934Box 166 \ 7  img037
Letter from L. Weekes (Luton) Ltd confirming the preparation of an order for 12 glass type fuses.16th Jan 1935Box 166 \ 7  img038
Experimental department report on tests to determine the best type of main fuse for cars to avoid 'black outs'.14th Jan 1935Box 166 \ 7  img039
Investigation into main fuse failures on Bentley chassis and a recommendation for a new glass cartridge type fuse.18th Jan 1935Box 166 \ 7  img040
Fuse testing, comparing fuse links with cartridge types and recommending the adoption of a tinned copper glass cartridge fuse.18th Jan 1935Box 166 \ 7  img041
The testing of different types of fuses, detailing fusing currents and material performance.18th Jan 1935Box 166 \ 7  img042
Comparison of the electrical and mechanical properties of cartridge fuses versus other link types.18th Jan 1935Box 166 \ 7  img043
Requesting the fitment of a modified main fuse to several chassis and ordering the necessary parts.30th Jan 1935Box 166 \ 7  img044
Blueprint for a pillar to adapt a cartridge-type main fuse to a standard disk board.31th Jan 1935Box 166 \ 7  img045
Internal order request for replacement switchboard fuses and switches due to an overload.13th Feb 1935Box 166 \ 7  img046
Instruction on how fuses should be loaded with a specific gauge of tinned copper wire.21th Feb 1935Box 166 \ 7  img047
Standard instruction regarding the loading of all fuses, except the field main emergency fuse, with 30 S.W.G. wire.22th Feb 1935Box 166 \ 7  img048
Telephone communication regarding battery fluctuation issues on chassis 72-SK for a client named Myers.27th Feb 1935Box 166 \ 7  img049
Experimental department report on tests of a new fuse board with glass cartridge fuses.27th Mar 1935Box 166 \ 7  img050
Tests and recommendations for a distribution fuse board with glass cartridge type fuses, specifically for the Spectre model.24th Oct 1935Box 166 \ 7  img051
Request to obtain 'Pol' permanent fuses from a supplier in London.24th Oct 1935Box 166 \ 7  img052
Request to order six small 2 amp cartridge type fuses from Messrs. Weekes Co.Ltd.27th Nov 1935Box 166 \ 7  img053
Directive to fit separate headlamp fuses on specific Bentley car models.10th Mar 1936Box 166 \ 7  img054
Letter from S. Guiterman & Co. Ltd. regarding the supply of Pol Mercury Fuses.28th Oct 1936Box 166 \ 7  img055
Advertisement for the 'POL' permanent, self-resetting mercury fuse.3rd Nov 1936Box 166 \ 7  img056
Investigation of faulty fuses and a shorting foot switch.3rd Nov 1936Box 166 \ 7  img057
Issues with glass-enclosed fuses and a foot-switch for dimming.5th Nov 1936Box 166 \ 7  img058
Order for one dozen Electric Clock fuses.12th Nov 1936Box 166 \ 7  img059
Issue with Phantom III fuses and a request to add a preventative feature to the moulding.11th Feb 1937Box 166 \ 7  img060
Letter from Hooper & Co (Coachbuilders) criticising the fuse and fuse box design on the Phantom III chassis.4th Feb 1937Box 166 \ 7  img061
Suggestion for a modification to a bakelite casing to make fuse replacement easier and prevent recurrence of a problem.20th Apr 1937Box 166 \ 7  img062
Inaccessibility of the distribution board and problems with the cartridge type fuse on the Phantom III chassis.20th Apr 1937Box 166 \ 7  img063
Report regarding an accessories fuse blowing when the traffic indicator is used on a 25.0.6. Chassis.22th Apr 1937Box 166 \ 7  img064
Letter to L. Weekes (Luton) Ltd. requesting a meeting to discuss modifications to a fuse design.23th Apr 1937Box 166 \ 7  img065
Letter from L. Weekes (Luton) Limited confirming a meeting appointment for Mr. C. H. Dryden.24th Apr 1937Box 166 \ 7  img066
Letter from L. Weekes (Luton) Limited discussing suggestions and recommendations for 30 amperes fuses.3rd May 1937Box 166 \ 7  img067
Letter from L. Weekes (Luton) Ltd. regarding the supply and testing of various types of fuses.3rd May 1937Box 166 \ 7  img068
Letter to L.Weekes (Luton) Ltd. discussing the design and supply of fuses.4th May 1937Box 166 \ 7  img069
Letter from L. Weekes (Luton) Ltd. concerning the provision of 18 experimental 30 ampere fuses.28th May 1937Box 166 \ 7  img070
Proposed improvements to electrical system fuses with a supplier.1st May 1937Box 166 \ 7  img071
Letter to a supplier regarding an unsuccessful experimental scheme for producing a tight coil in fuse wire.4th May 1937Box 166 \ 7  img072
Comparing different types of electrical system fuses and their fastening methods.13th May 1937Box 166 \ 7  img073
Design and cost of electrical system fuses.13th May 1937Box 166 \ 7  img074


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