| Description | Date | Identifier | |
| Requesting the manufacture and testing of three fuses for all chassis models. | 1st Jun 1937 | Box 166 \ 7 img075 | |
| Letter to Mr. Wyborn postponing a visit due to a company holiday. | 16th Jul 1937 | Box 166 \ 7 img076 | |
| Requesting the production of two sample fuse units for inspection and testing. | 6th Jul 1937 | Box 166 \ 7 img077 | |
| Internal memorandum regarding a new design of open-type fuses, instructing for production and testing. | 1st Sep 1937 | Box 166 \ 7 img078 | |
| Bench tests of open type fuses, comparing their disadvantages with those of cartridge type fuses. | 15th Sep 1937 | Box 166 \ 7 img079 | |
| The design and testing of a new open type fuse compared to the cartridge type. | 15th Sep 1937 | Box 166 \ 7 img080 | |
| Recommending the deletion of the dynamo armature fuse. | 5th Nov 1937 | Box 166 \ 7 img081 | |
| Failure modes of a regulator concerning the armature fuse and second stage contacts. | 18th Nov 1937 | Box 166 \ 7 img082 | |
| Potential removal of dynamo armature fuses, weighing fault rates against fire risks. | 15th Nov 1937 | Box 166 \ 7 img083 | |
| Fault diagnosis table for a C.A.V. regulator, detailing the effects with and without an armature fuse. | 13th Nov 1937 | Box 166 \ 7 img084 | |
| Arguing for the deletion of the dynamo armature fuse from various chassis. | 5th Nov 1937 | Box 166 \ 7 img085 | |
| Adoption of a Lucas single contact regulator over the C.A.V. type for better performance and cost reduction. | 9th Nov 1937 | Box 166 \ 7 img086 | |
| Instruction to despatch 12 fuses to be re-loaded by Messrs. L. Weekes Ltd. | 18th Nov 1937 | Box 166 \ 7 img087 | |
| New position of the distribution board with open type fuses for the Wraith and Phantom models. | 15th Dec 1937 | Box 166 \ 7 img088 | |
| The Wraith fuse box position and a new diagram of connections. | 30th Dec 1937 | Box 166 \ 7 img089 | |
| Requesting the fitting of open type fuses and holders to a 6.B.IV chassis. | 14th Jan 1938 | Box 166 \ 7 img090 | |
| Depot sheet investigating issues with the armature fuse, identifying flimsy clips as the cause of non-charging dynamos. | 24th Jan 1938 | Box 166 \ 7 img091 | |
| The increased capacity of open-type fuses. | 27th Jan 1938 | Box 166 \ 7 img092 | |
| The fitting of new open type fuses to specific cars. | 28th Jan 1938 | Box 166 \ 7 img093 | |
| Test report and recommendation for an Open Type Armature Fuse for Phantom III. | 22th Feb 1938 | Box 166 \ 7 img094 | |
| Recommending the fitment of an Open Type Armature Fuse after satisfactory road testing. | 22th Feb 1938 | Box 166 \ 7 img095 | |
| Overheating of 'Open' type fuses and outlining tests on different clip and carrier combinations. | 18th Oct 1938 | Box 166 \ 7 img096 | |
| Test report comparing the temperature performance of different fuse types and carriers over time. | 18th Oct 1938 | Box 166 \ 7 img097 | |
| Analysis and recommendations for improving fuse holder and clip design based on heating and handling tests. | 18th Oct 1938 | Box 166 \ 7 img098 | |
| Requesting the fitting of standard steel fuse clips for the armature fuse on a car. | 1st Nov 1938 | Box 166 \ 7 img099 | |
| Increasing the fuse element gauge from 30 S.W.G. to 28 S.W.G. on certain models. | 3rd Nov 1938 | Box 166 \ 7 img100 | |
| Confirming the dispatch of a complete set of fuses with a spare bobbin. | 3rd Nov 1938 | Box 166 \ 7 img101 | |
| Dispatch of replacement fuses and fuse wire for Wraith car 26.G.VI. | 4th Nov 1938 | Box 166 \ 7 img102 | |
| Confirming the return of a set of fuses and one bobbin removed from Chassis No. 26 G V1. | 7th Nov 1938 | Box 166 \ 7 img103 | |
| Advice memo detailing the dispatch of fuses and fuse wire for a specific chassis. | 7th Nov 1938 | Box 166 \ 7 img104 | |
| Scheme for an accessory fuse unit on the dashboard for a Bentley 5. | 8th Jun 1939 | Box 166 \ 7 img105 | |
| Proposal to add a junction box and fuse unit for coachbuilders, specifying fuse ratings for the rear blind and centre division. | 16th May 1939 | Box 166 \ 7 img106 | |
| Fuse wire specifications and recommending cartridge fuses over open-type fuses for certain circuits. | 23th Jun 1939 | Box 166 \ 7 img107 | |
| Investigation into a fuse failure after a short circuit incident in a car. | 8th Mar 1940 | Box 166 \ 7 img108 | |
| Fuse wire testing, with observations on 30 SWG wire and a recommendation to replace the existing 28 SWG wire. | 8th Mar 1940 | Box 166 \ 7 img109 | |
| Secret memo instructing a change to the fuse for the tail lamp circuit on B.V. and Senior Range cars. | 14th Mar 1940 | Box 166 \ 7 img110 | |
| Recommending the type of wire for fuse carriers and the main fuse. | 15th Mar 1940 | Box 166 \ 7 img111 | |
| Recommending 30 SWG wire for fuse carriers and the main fuse. | 15th Mar 1940 | Box 166 \ 7 img112 | |
| Extract from a report on the condition of the distribution box and cut-out on vehicle 18-CIV after 10,000 miles. | 30th Jan 1931 | Box 166 \ 8 img001 | |
| Reference sheet for previous information regarding the 40/50 distribution box and cut-out. | 1st Jan 1931 | Box 166 \ 8 img002 | |
| Cover letter for specification pages regarding the R.R. Distribution Box and Cutout for Phantom II and 20/25 models. | 6th Oct 1931 | Box 166 \ 8 img003 | |
| Specification for production inspection, adjustment, and testing of a distribution box and cutout for 40/50 and 20/25 HP cars. | 16th Oct 1931 | Box 166 \ 8 img004 | |
| Test procedure for a dynamo and distribution box, detailing voltage, amperage, and resistance limits. | 16th Oct 1931 | Box 166 \ 8 img005 | |
| Instructions for testing the point at which dynamo cutout contacts separate. | 16th Oct 1931 | Box 166 \ 8 img006 | |
| Wiring diagram for a 40/50 distribution box and cutout test. | 4th Nov 1931 | Box 166 \ 8 img007 | |
| Redesign of the distribution board and cut-out unit for various chassis models. | 4th Nov 1931 | Box 166 \ 8 img008 | |
| Recommendation to relocate the dynamo cut-out and consolidate the electrical circuit distribution for the 20/25 chassis. | 4th Nov 1931 | Box 166 \ 8 img009 | |
| Electrical experimental record sheet for a 20/25 Switchbox. | 24th Nov 1931 | Box 166 \ 8 img010 | |
| Consolidation of the electrical distribution system and the provision of an accessory distribution box for body wiring. | 9th Jan 1932 | Box 166 \ 8 img011 | |
| Body wiring and accessory box for the Phantom II chassis. | 22th Jan 1932 | Box 166 \ 8 img012 | |
| The body wiring for the Phantom II chassis, specifically regarding the high prevalence of electric cigar lighters. | 29th Jan 1932 | Box 166 \ 8 img013 | |
| The update of the instrument board on chassis 18-G-IV and 19-G-IV. | 4th Feb 1932 | Box 166 \ 8 img014 | |
| Standardisation of a distribution board and cutout to D.54343. | 21th Aug 1934 | Box 166 \ 8 img015 | |
| List of blueprints for new parts related to the 'Spectre' Distribution Board, R.R.Sch.723. | 23th Nov 1934 | Box 166 \ 8 img016 | |
| Modifications to fuse clip holders for the 'Spectre' Distribution Board, R.R. Scheme 723. | 2nd Jan 1935 | Box 166 \ 8 img017 | |
| Request to detail the Phantom III distribution box D.CD.59 for trial, with a note about fitting new type fuses. | 10th Sep 1937 | Box 166 \ 8 img018 | |
| The Bentley Chassis Distribution Board in relation to a revised instrument board for chassis B.56.BN. | 14th Sep 1937 | Box 166 \ 8 img019 | |
| Approval for detailing the Wraith III electrical system's 5 fuse distribution box and regulator unit. | 16th Sep 1937 | Box 166 \ 8 img020 | |
| Production and mounting of a Phantom III Distribution Board. | 21th Sep 1937 | Box 166 \ 8 img021 | |
| Technical memo detailing the revised position of the distribution board for the 'Phantom III'. | 1st Oct 1937 | Box 166 \ 8 img022 | |
| Continued list of standard parts, quantities, and their alternatives. | 1st Oct 1937 | Box 166 \ 8 img023 | |
| Instruction to issue a new open type fuse and base for the Wraith III distribution board on the experimental chassis. | 22th Oct 1937 | Box 166 \ 8 img024 | |
| Proposal for an alternative fuse design to replace unreliable cartridge fuses on the Phantom III and Bentley Chassis distribution board. | 10th Dec 1937 | Box 166 \ 8 img025 | |
| Requesting the production of a 5-fuse distribution board for Wraith Experimental cars. | 5th Jan 1938 | Box 166 \ 8 img026 | |
| Modification to a 5-fuse distribution board. | 5th Jan 1938 | Box 166 \ 8 img027 | |
| Modifications to the Wraith III distribution board and associated blueprints. | 11th Feb 1938 | Box 166 \ 8 img028 | |
| Modification to the fuse contact on the distribution board for all chassis. | 21th Mar 1939 | Box 166 \ 8 img029 | |
| The production and experimental fitting of 24 newly designed DB.2342 Fuse Contacts for distribution boards. | 21th Apr 1939 | Box 166 \ 8 img030 | |
| The issue of a covering order to Messrs. Lucas Ltd. for one DKH4.0 Distributor. | 12th Mar 1941 | Box 166 \ 8 img031 | |
| Letter from Joseph Lucas Ltd. regarding a sample 5-way Fuse Box of the 5ML Model and an enclosed drawing. | 20th Oct 1941 | Box 166 \ 8 img032 | |
| Letter from Joseph Lucas Ltd. about a previously omitted drawing for a C.A.V. 5ML Model Fuse Box. | 21th Oct 1941 | Box 166 \ 8 img033 | |
| Covering order for a UF62/1160 type fuse box from Messrs. Lucas. | 24th Oct 1941 | Box 166 \ 8 img034 | |
| Covering order for one Lucas type fuse box. | 24th Oct 1941 | Box 166 \ 8 img035 | |
| Letter to Joseph Lucas, Ltd. concerning a fuse box and requesting three pairs of standard Bentley type headlamps. | 24th Oct 1941 | Box 166 \ 8 img036 | |
| Request to replace the old-type wind-horn relay on car 37-EX with a standard type. | 5th Jun 1936 | Box 166 \ 9 img001 | |
| Investigation into the temporary failure of Lucas Wind Tone Horns due to moisture and dirt. | 10th May 1936 | Box 166 \ 9 img002 | |
| Horn failure due to blockage from rain or snow, suggesting a flexible mounting as a solution. | 12th Jun 1936 | Box 166 \ 9 img003 | |
| Alternative modification for a quieter horn button operation. | 12th Jun 1936 | Box 166 \ 9 img004 | |
| Unsuitability and objections to standardizing Lucas Wind Tone Horns. | 15th Jun 1936 | Box 166 \ 9 img005 | |
| Investigation into the failure of Lucas Wind Tone Horns due to moisture and dirt build-up. | 10th Jun 1936 | Box 166 \ 9 img006 | |
| Horn failure due to blockage from rain or snow and a suggestion for flexible mounting. | 18th Jun 1936 | Box 166 \ 9 img007 | |
| Requesting the overhaul and readjustment of a pair of Lucas Wind Tone Horns from a 25/30 HP car. | 18th Jun 1936 | Box 166 \ 9 img008 | |
| Letter to Joseph Lucas Ltd. concerning issues with Wind Tone Horns, requesting comments on a report from testers in France. | 17th Jun 1936 | Box 166 \ 9 img009 | |
| Tests conducted on Lucas Wind Tone Horns to investigate failures caused by moisture. | 10th Jun 1936 | Box 166 \ 9 img010 | |
| The causes of car horn failure in adverse weather conditions like rain and snow. | 19th Jun 1936 | Box 166 \ 9 img011 | |
| Requesting the modification of two old Lucas Wind-Horn relay switches. | 19th Jun 1936 | Box 166 \ 9 img012 | |
| Repair and upgrade of damaged Lucas wind horns from car 21-G-IV. | 25th Jun 1936 | Box 166 \ 9 img013 | |
| Dispatch order for a pair of Wind Horns to be sent to J. Lucas Ltd. for overhaul, repair, and modification. | 29th Jun 1936 | Box 166 \ 9 img014 | |
| Failure and repair of Lucas Wind Horns from car 37-EX. | 2nd Aug 1936 | Box 166 \ 9 img015 | |
| Letter to Joseph Lucas Ltd. following up on issues found during tests of their Wind Tone Horns. | 7th Aug 1936 | Box 166 \ 9 img016 | |
| Letter from Joseph Lucas Limited regarding a delay in providing a report on tests for wind tone horns. | 11th Aug 1936 | Box 166 \ 9 img017 | |
| Requesting the return of Lucas Wind Horns from Car 35-EX for modification. | 27th Aug 1936 | Box 166 \ 9 img018 | |
| Request to fit Delco Remy horns to a Chevrolet car for trials to compare with problematic Lucas horns. | 29th Aug 1936 | Box 166 \ 9 img019 | |
| Standardisation of parts request for Lucas Wind Tone Horns. | 24th Aug 1936 | Box 166 \ 9 img020 | |
| Estimated cost calculation for extra Jigs, Tools, and Equipment for the 'M' series chassis. | 9th Jul 1936 | Box 166 \ 9 img021 | |
| Request for the return, repair and modification of Lucas Wind Horns from car 36-EX due to a sparking issue. | 17th Sep 1936 | Box 166 \ 9 img022 | |
| Incorrect repair and return of Lucas wind horns from car 36-EX. | 2nd Oct 1936 | Box 166 \ 9 img023 | |
| The incorrect repair and modification of Lucas Wind Horns. | 22th Oct 1936 | Box 166 \ 9 img024 | |
| Request for an update on the present position of electric horns made from Bakelite. | 27th Oct 1936 | Box 166 \ 9 img025 | |
| New single-note electric horns from Lucas Co., highlighting their reduced current consumption. | 28th Oct 1936 | Box 166 \ 9 img026 | |
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