| Description | Date | Identifier | |
| Letter from S. Smith & Sons regarding the layout and switch for an oil sump gauge. | 20th Mar 1940 | Box 168a \ 1 img161 | |
| Letter concerning a failure in an experimental speedometer and a postscript on the accuracy of electric clocks. | 27th Mar 1940 | Box 168a \ 1 img162 | |
| Covering note for blueprints related to the 'RIPPLET' instrument board, sections PL. 149 and RD. 718. | 1st Apr 1940 | Box 168a \ 1 img163 | |
| Letter from S. Smith & Sons chasing the return of an instrument that has not yet arrived. | 18th Apr 1940 | Box 168a \ 1 img164 | |
| Letter to S. Smith & Sons regarding conventional and futuristic instrument designs and a request for drawings. | 22th Apr 1940 | Box 168a \ 1 img165 | |
| Letter to Park Ward & Co. Ltd. providing final details for the Bentley V instrument board design. | 20th May 1940 | Box 168a \ 1 img166 | |
| Necessary adjustments to the steering wheel, instrument visibility, and wiring. | 20th Sep 1934 | Box 168a \ 1 img167 | |
| Letter from S. Smith & Sons regarding instrument chassis drawings and American car facia specimens. | 25th Apr 1940 | Box 168a \ 1 img168 | |
| Request for the production of an Auxiliary and Main Coil assembly for an automatic switch, using a finer wire than standard, with a detailed parts list for each. | 29th Nov 1929 | Box 168a \ 2 img001 | |
| Instruction to fit coils of reduced wire gauge to the starter switch on an experimental laboratory rig. | 28th Jan 1930 | Box 168a \ 2 img002 | |
| Request to order one pound of 27 SWG D.C.C. copper wire for an S.S. starter. | 6th Feb 1930 | Box 168a \ 2 img003 | |
| Request to order experimental silk-covered copper wire for a Phantom II starter switch with reduced gauge windings. | 2nd Mar 1930 | Box 168a \ 2 img004 | |
| List of parts required for a backing light switch, scheme 3029. | 28th Feb 1930 | Box 168a \ 2 img005 | |
| Instructing a hold on work for the backing light switch due to it fouling the new gearbox suspension. | 3rd Mar 1930 | Box 168a \ 2 img006 | |
| The addition of tungsten contacts to the L.H. chassis backing light switch. | 29th May 1930 | Box 168a \ 2 img007 | |
| Adapting a backing light switch to serve as a stop light switch for the L.H. P.2. chassis. | 6th Jun 1930 | Box 168a \ 2 img008 | |
| New scheme for a stop light switch, referencing previous designs. | 1st Jul 1930 | Box 168a \ 2 img009 | |
| New parts for a Stop Light Switch on the L.H.S.S. Chassis under 'N' schemes 3120 & 3128. | 19th Jul 1930 | Box 168a \ 2 img010 | |
| Leaking braking light switch on a test car and potential design modifications to fix it. | 14th Aug 1930 | Box 168a \ 2 img011 | |
| Slight oil leak from a backing light switch and the proposed corrective action. | 18th Aug 1930 | Box 168a \ 2 img012 | |
| Test report on using finer gauge wire on solenoid coils for a starter main and relay switch. | 4th Sep 1930 | Box 168a \ 2 img013 | |
| Test report comparing the electrical characteristics of standard and experimental coils and switches. | 4th Sep 1930 | Box 168a \ 2 img014 | |
| Recommendation to fit a switch to an experimental chassis following a successful endurance test. | 13th Sep 1930 | Box 168a \ 2 img015 | |
| Experimental starter motor main and auxiliary switch with finer gauge windings for its coils. | 13th Sep 1930 | Box 168a \ 2 img016 | |
| Notice urging the fitting of a specific starter motor switch with finer windings to certain car models. | 1st Oct 1930 | Box 168a \ 2 img017 | |
| Standardisation report for a backing light and switch. | 26th Aug 1930 | Box 168a \ 2 img018 | |
| Directive to modify the starter main and auxiliary switch unit for an experimental Phantom II chassis to a new design. | 6th Dec 1930 | Box 168a \ 2 img019 | |
| Request to obtain specific gauges of copper wire for a starter main and auxiliary switch unit. | 23th Dec 1930 | Box 168a \ 2 img020 | |
| Faulty backing light switch from a L.H.SS. chassis with badly oxidized points. | 9th Feb 1931 | Box 168a \ 2 img021 | |
| Investigation into a returned switch with a contact failure, its subsequent cleaning, testing, and approval for production use. | 11th Jul 1911 | Box 168a \ 2 img022 | |
| Instructions regarding a less expensive component and its production implications. | 12th Sep 1924 | Box 168a \ 2 img023 | |
| Investigation report into the failure of an L.H. Chassis Backing Light Switch, recommending silver or gold silver contact points over tungsten. | 2nd Feb 1931 | Box 168a \ 2 img024 | |
| Phantom II starter motor failure caused by oily sand, exacerbated by an incorrect repair attempt by a French mechanic. | 25th Feb 1931 | Box 168a \ 2 img025 | |
| Examination report on starter motor and auto switch failures on chassis 70.XJ. | 20th Feb 1931 | Box 168a \ 2 img026 | |
| Suggestion to fix a starter circuit diagram on the main switch cover for the Phantom II starter motor. | 4th Mar 1931 | Box 168a \ 2 img027 | |
| Starter motor issues with a Phantom II in cold weather. | 5th Mar 1931 | Box 168a \ 2 img028 | |
| Phantom II sequence starter engagement, suggesting an experiment using slightly helical teeth to solve insufficient teazer engaging force. | 18th Mar 1931 | Box 168a \ 2 img029 | |
| Experiment with slightly spiral pinion and gear wheel teeth for the Phantom II sequence starter gear. | 9th Mar 1931 | Box 168a \ 2 img030 | |
| Specification of inspection and test procedures for a sequence starter motor with a longitudinal damper, version 2. | 20th Mar 1931 | Box 168a \ 2 img031 | |
| Testing procedures for a motor's armature, pinion, insulation, and brushes. | 20th Mar 1931 | Box 168a \ 2 img032 | |
| Page detailing motor testing procedures, including light, armature return, and damping tests. | 20th Mar 1931 | Box 168a \ 2 img033 | |
| Circuit diagram showing the arrangement of apparatus and connections for a starter motor test. | 20th Mar 1931 | Box 168a \ 2 img034 | |
| Test procedure for a longitudinal motion system involving motor engagement and load application. | 20th Mar 1931 | Box 168a \ 2 img035 | |
| Specification document page detailing Teazer Torque and Load tests for a motor component. | 20th Mar 1931 | Box 168a \ 2 img036 | |
| Page 6 of a document detailing motor load and brush distress testing procedures. | 20th Mar 1931 | Box 168a \ 2 img037 | |
| Page detailing motor testing procedures including intermittent load, torque, pinion, and insulation breakdown tests. | 9th Apr 1931 | Box 168a \ 2 img038 | |
| Cost and necessity of adding a starter circuit diagram to the Phantom II starter motor switch cover. | 9th Apr 1931 | Box 168a \ 2 img039 | |
| Endurance test report on a 20/25 HP starter switch to investigate contact burning. | 4th Apr 1931 | Box 168a \ 2 img040 | |
| Proposal for a new relay-operated starting switch design for the 20/25 HP chassis. | 1st May 1931 | Box 168a \ 2 img041 | |
| Proposing a new design for a relay-operated starter switch. | 11th May 1931 | Box 168a \ 2 img042 | |
| Faulty starter motor plunger switch that activated spontaneously while the car was on the wash. | 29th Jul 1931 | Box 168a \ 2 img043 | |
| The cause of a short circuit failure in a starter motor switch, likely due to a flaw in the bakelite moulding. | 7th Aug 1931 | Box 168a \ 2 img044 | |
| Report regarding a starter motor switch, referencing battery discharge and potential leaks through faulty Bakelite moulding. | 14th Aug 1931 | Box 168a \ 2 img045 | |
| Query regarding the repair of a starter motor switch GNS-5. | 20th Aug 1931 | Box 168a \ 2 img046 | |
| Suggesting the repair and stocking of a Starter Motor Switch from GNS-5. | 27th Aug 1931 | Box 168a \ 2 img047 | |
| Starter motor switch from trials chassis GNS-5 sent for repair. | 28th Aug 1931 | Box 168a \ 2 img048 | |
| Optimal placement of the starter switch press button on the dashboard. | 23th Oct 1931 | Box 168a \ 2 img049 | |
| Selection of an Armature Spring for the Automatic Switch on a 40-50 HP Chassis. | 4th Nov 1931 | Box 168a \ 2 img050 | |
| Recommending spring D.72922 for use in the 40/50 automatic switch on production models. | 7th Nov 1931 | Box 168a \ 2 img051 | |
| The testing of an aluminium bronze starter motor pinion compared to a standard steel pinion. | 10th Nov 1931 | Box 168a \ 2 img052 | |
| Customer complaint about a defective starter switch for chassis GOS.60. | 30th Nov 1931 | Box 168a \ 2 img053 | |
| Query about whether the backing light switch is a standard fitment on the J. 3. gearbox. | 1st Dec 1931 | Box 168a \ 2 img054 | |
| Not to make provisions for a backing light switch on the J.111 gearbox due to low customer demand. | 9th Dec 1931 | Box 168a \ 2 img055 | |
| Confusing placement of the centre light switch relative to the engine starter lever on a 20/25HP car. | 11th Jul 1932 | Box 168a \ 2 img056 | |
| Potential driver confusion between the starter lever and the light switch on the 20/25 HP car, proposing a modification. | 1st Jan 1932 | Box 168a \ 2 img057 | |
| Modification of the starter automatic switch to prevent sparking and simplify assembly by deleting carbon contacts. | 16th Oct 1931 | Box 168a \ 2 img058 | |
| Fitting of a new part to an 'O' Series chassis, including costs for materials and tools. | 1st Mar 1932 | Box 168a \ 2 img059 | |
| Cost and functionality of the J.III and Peregrine starter motor main and relay switch. | 1st Mar 1932 | Box 168a \ 2 img060 | |
| Operation and testing of a starter motor engagement and automatic hold-off feature. | 1st Mar 1932 | Box 168a \ 2 img061 | |
| Confirming a blueprint for the Delage Master Switch has been obtained and attached. | 21th Mar 1932 | Box 168a \ 2 img062 | |
| Outlining reasons against mounting the lighting switch on the top of the steering column. | 2nd Mar 1932 | Box 168a \ 2 img063 | |
| Recommendation for a new R.R. switchbox, comparing its functionality to a simpler Bosch switch. | 22th Mar 1932 | Box 168a \ 2 img064 | |
| Modification instructions for automatic starter switches on specific exceptional chassis models. | 23th Mar 1932 | Box 168a \ 2 img065 | |
| Optimal placement of the dimming control switch, arguing for the steering column over a foot control. | 22th Jul 1932 | Box 168a \ 2 img066 | |
| Request for pricing information on Bosch lighting switches and head lamp dimming switches. | 1st Mar 1932 | Box 168a \ 2 img067 | |
| Clarifying the placement of the chassis lighting switch on the steering column. | 30th Mar 1932 | Box 168a \ 2 img068 | |
| Design and modification of the J.III Headlamp Control Switch, noting issues with the original knife switch design. | 31th Mar 1932 | Box 168a \ 2 img069 | |
| Potential changes to car electrical switches and the starter system. | 12th Apr 1932 | Box 168a \ 2 img070 | |
| Request to place a link across the automatic starter switch for chassis 58-GN - 3G. | 4th Apr 1932 | Box 168a \ 2 img071 | |
| Electrical units, specifically a Lucas horn and starter switch, for chassis 58-GW. | 3rd Apr 1932 | Box 168a \ 2 img072 | |
| Comparative cost analysis for chassis switchboxes, detailing a Bosch model versus an in-house model with a separate push starter button. | 1st Apr 1932 | Box 168a \ 2 img073 | |
| On the testing and design of a simplified automatic starter switch for 40/50, J.3, and Peregrine models. | 6th Jun 1932 | Box 168a \ 2 img074 | |
| New automatic starter from Lucas called 'Startix'. | 18th Jul 1932 | Box 168a \ 2 img075 | |
| Replying to an inquiry about 'Startix' automatic switches, confirming possession and upcoming testing. | 18th Jul 1932 | Box 168a \ 2 img076 | |
| Description and operational overview of the 'Startix' automatic starting switch. | 9th Aug 1932 | Box 168a \ 2 img077 | |
| Continued report on the operation and potential disadvantages of the Startix automatic starting system. | 1st Jun 1932 | Box 168a \ 2 img078 | |
| Letter from Bendix-Perrot Brakes regarding the manufacturing rights for a 'Startix' component and referring a request for a 12-volt unit to Joseph Lucas Ltd. | 9th Aug 1932 | Box 168a \ 2 img079 | |
| Letter to Bendix-Perrot Brakes Ltd. concerning the return of a 'Startix' starter motor switch unit with a bent terminal. | 16th Aug 1932 | Box 168a \ 2 img080 | |
| Return of a loaned 'Startix' starter motor switch unit to Bendix-Perrot Brakes Ltd. | 17th Aug 1932 | Box 168a \ 2 img081 | |
| Letter from Bendix-Perrot Brakes Ltd. concerning the return of a loaned Startix unit and future enquiries. | 18th Aug 1932 | Box 168a \ 2 img082 | |
| Confirming a diagram for isolating a starter button and requesting a test rig on a chassis. | 7th Dec 1932 | Box 168a \ 2 img083 | |
| Wiring diagram to feed the ignition, petrol gauge, and starter push through the master switch. | 3rd Dec 1932 | Box 168a \ 2 img084 | |
| Suggesting a design alteration for a new main switch, involving a change in coil wire gauge to avoid scrap. | 3rd Dec 1932 | Box 168a \ 2 img085 | |
| Request to produce three electro-magnetic main switch coils for an experiment on the Peregrine II, 20/25 HP and 40/50 HP models. | 16th Jan 1933 | Box 168a \ 2 img086 | |
| Specification for production inspection and testing of a new sequence starter main switch. | 18th Jan 1933 | Box 168a \ 2 img087 | |
| Inspection and test specification for a sequence starter main switch unit. | 20th Mar 1941 | Box 168a \ 2 img088 | |
| Gap checks and electrical test procedures for a switch component. | 20th Mar 1941 | Box 168a \ 2 img089 | |
| Test procedure for an electrical switch, detailing pressure, current, and voltage application. | 1st Feb 1931 | Box 168a \ 2 img090 | |
| Table of gap measurements and limits for a main switch unit in various positions. | 1st Feb 1931 | Box 168a \ 2 img091 | |
| Confirming a conversation about the weakness of a starter switch's duralumin arm and a possible modification. | 23th Jan 1933 | Box 168a \ 2 img092 | |
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