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