| Description | Date | Identifier | |
| The petrol gauge wire for Bentley cars and the availability of replacements. | 5th Jul 1937 | Box 167 \ 4 img167 | |
| The production of a replacement oil-resisting Bentley petrol gauge wire. | 8th Jul 1937 | Box 167 \ 4 img168 | |
| Letter to S.Smith & Sons regarding a petrol gauge meter with special bakelite varnished windings. | 11th Jun 1937 | Box 167 \ 4 img169 | |
| Concerning cost comparisons and potential savings. | 14th Jul 1937 | Box 167 \ 4 img170 | |
| Investigation into the suitability of a Smiths single wire electric petrol gauge, focusing on the effects of voltage variation. | 14th Jul 1937 | Box 167 \ 4 img171 | |
| Needle oscillation in a single wire petrol gauge, concluding with a recommendation against its adoption. | 14th Jul 1937 | Box 167 \ 4 img172 | |
| Investigation into the performance of a Smiths single wire electric petrol gauge. | 14th Jul 1937 | Box 167 \ 4 img173 | |
| Report concluding against the adoption of a single wire petrol gauge due to issues with needle oscillation. | 14th Jul 1937 | Box 167 \ 4 img174 | |
| Letter to Smith & Sons Ltd requesting an updated cost comparison for a single wire petrol gauge. | 15th Jul 1937 | Box 167 \ 4 img175 | |
| Letter from S. Smith & Sons regarding a quotation for 1,000 single wire type gauges. | 16th Jul 1937 | Box 167 \ 4 img176 | |
| Softening of the Bentley 3½ Litre petrol gauge wire and the recommended solution. | 16th Jul 1937 | Box 167 \ 4 img177 | |
| Letter from S. Smith & Sons (Motor Accessories) Ltd regarding a single wire petrol gauge. | 27th Jul 1937 | Box 167 \ 4 img178 | |
| Letter from S. Smith & Sons regarding test results on a petrol gauge meter and experiments with an improved control coil. | 17th Jun 1937 | Box 167 \ 4 img179 | |
| Letter from H.M. Hobson Components Ltd. enclosing literature for K-S Electric Telegages. | 23th Oct 1937 | Box 167 \ 4 img180 | |
| Damaged petrol gauge for a Bentley car, requesting its return to the makers for repair. | 14th Nov 1938 | Box 167 \ 4 img181 | |
| Despatch note for a petrol gauge sent to Messrs. S. Smith & Sons Ltd. for repair. | 15th Nov 1938 | Box 167 \ 4 img182 | |
| Requesting the replacement of a faulty petrol gauge on car 3.B.50. | 15th Jul 1939 | Box 167 \ 4 img183 | |
| Inquiry to H.M. Hobson Components Ltd. regarding a Water Temperature Telegauge and an oil pressure warning unit. | 17th Oct 1940 | Box 167 \ 4 img184 | |
| Letter from H.M. Hobson regarding the discontinuation of manufacturing water temperature gauges. | 23th Oct 1940 | Box 167 \ 4 img185 | |
| Cross-reference note for previous information relating to Lucas and other windscreen wipers. | 1st Jan 1931 | Box 167 \ 5 img001 | |
| Faults with the GLR-31 Propaganda Car, including water leaks, rattles, and unreliable windscreen wipers. | 9th Jan 1931 | Box 167 \ 5 img002 | |
| Complaint about windscreen wipers and the provision of improved samples for testing. | 14th Jan 1931 | Box 167 \ 5 img003 | |
| Unsatisfactory performance and failures of the Lucas windscreen wiper. | 19th Jan 1931 | Box 167 \ 5 img004 | |
| Dissatisfaction with the Lucas windscreen wiper and the suggestion to design a new one. | 22th Jan 1931 | Box 167 \ 5 img005 | |
| Extract from a 10,000-mile test report on vehicle 18-GIV, detailing issues with a Lucas windscreen wiper. | 30th Jan 1931 | Box 167 \ 5 img006 | |
| From EFC to Ev detailing the known failings of the Lucas windscreen wiper. | 8th Feb 1931 | Box 167 \ 5 img007 | |
| Follow-up request for an answer regarding a Lucas windscreen wiper. | 10th Mar 1931 | Box 167 \ 5 img008 | |
| Letter to Lucas Ltd. regarding an unsatisfactory electric windscreen wiper and a request to test an improved model. | 8th Jun 1931 | Box 167 \ 5 img009 | |
| Letter chasing Lucas Electrical Co. Ltd. for replies to previous queries regarding windscreen wipers and horns. | 26th Jun 1931 | Box 167 \ 5 img010 | |
| Complaining about the failure of a Lucas windscreen wiper on car 18-G-IV. | 8th Oct 1931 | Box 167 \ 5 img011 | |
| Urgent telegram to Robinson, Lucas in Birmingham requesting a new windscreen wiper for a test car. | 23th Oct 1931 | Box 167 \ 5 img012 | |
| Telegram received by telephone regarding a promised test car. | 23th Oct 1931 | Box 167 \ 5 img013 | |
| Letter from Joseph Lucas Limited regarding a new Dual Arm Windscreen Wiper for a test car. | 23th Oct 1931 | Box 167 \ 5 img014 | |
| Continuation page of a letter from Joseph Lucas Limited. | 23th Oct 1931 | Box 167 \ 5 img015 | |
| Correspondence with Jos. Lucas Research Laboratories regarding a delay in testing a new dual-arm windscreen wiper. | 24th Oct 1931 | Box 167 \ 5 img016 | |
| The testing and features of a new Lucas electric windscreen wiper. | 4th Nov 1931 | Box 167 \ 5 img017 | |
| Technical report on the failure and inefficiency of a Lucas windscreen wiper. | 23th Nov 1931 | Box 167 \ 5 img018 | |
| Letter detailing test results and issues with a new Lucas windscreen wiper. | 30th Nov 1931 | Box 167 \ 5 img019 | |
| Letter from Joseph Lucas Research Laboratories discussing test results and design issues of a new type rack screenwiper. | 4th Dec 1931 | Box 167 \ 5 img020 | |
| Correspondence regarding a Lucas windscreen wiper failure on vehicle 18-GIV and arranging for replacement arms. | 9th Dec 1931 | Box 167 \ 5 img021 | |
| Letter from Joseph Lucas Research Laboratories regarding the measured spring pressures for two windscreen wiper arms for a Continental test car. | 22th Dec 1931 | Box 167 \ 5 img022 | |
| Lucas representative taking a high frequency alto horn and a windscreen wiper for repair. | 6th Jan 1932 | Box 167 \ 5 img023 | |
| Poor performance of a windscreen wiper system after a 10,000-mile trial and requesting proposals from Lucas for a better machine. | 18th Jan 1932 | Box 167 \ 5 img024 | |
| Letter to Joseph Lucas Ltd. regarding the return of a high-frequency horn and criticism of a slow windscreen wiper. | 19th Jan 1932 | Box 167 \ 5 img025 | |
| Letter from Joseph Lucas Ltd. regarding examination results of a broken Alto Horn and diaphragm. | 21th Jan 1932 | Box 167 \ 5 img026 | |
| Letter from Joseph Lucas Ltd regarding modifications and speed of a screen wiper following a 10,000-mile test. | 22th Jan 1932 | Box 167 \ 5 img027 | |
| Response from Lucas regarding a complaint about the windscreen wiper speed. | 25th Jan 1932 | Box 167 \ 5 img028 | |
| Letter to Joseph Lucas Ltd. regarding the performance of windscreen wipers at high speeds. | 27th Jan 1932 | Box 167 \ 5 img029 | |
| Letter urgently requesting the return of a wiper tested on a 20/25 chassis. | 27th Jan 1932 | Box 167 \ 5 img030 | |
| Modifications to Lucas windscreen wipers for better performance and a forthcoming 10,000-mile test. | 27th Jan 1932 | Box 167 \ 5 img031 | |
| Critiquing the proposed speed of Lucas windscreen wipers and advocating for a faster, more robust design. | 26th Jan 1932 | Box 167 \ 5 img032 | |
| Letter from Joseph Lucas Ltd discussing the performance and limitations of a new dual-arm screen wiper. | 29th Jan 1932 | Box 167 \ 5 img033 | |
| Letter from Joseph Lucas Limited discussing modifications and improvements to a sample windscreen wiper. | 29th Jan 1935 | Box 167 \ 5 img034 | |
| Attaching a letter from Messrs Lucas regarding an improved pattern windscreen wiper being tested. | 30th Jan 1932 | Box 167 \ 5 img035 | |
| Letter to Joseph Lucas Ltd regarding testing the effect of wind pressure on windscreen wipers at high speeds. | 30th Jan 1932 | Box 167 \ 5 img036 | |
| Letter from Joseph Lucas Ltd confirming the alteration and dispatch of a No.51 RW Electric Wiper. | 19th Feb 1932 | Box 167 \ 5 img037 | |
| Letter from Scintilla Limited regarding the dispatch of windscreen wipers and horns for testing. | 2nd Apr 1932 | Box 167 \ 5 img038 | |
| Confirmation of an order to Lucas's for a new pattern RW dual arm windscreen wiper for car 17-GIV. | 12th May 1932 | Box 167 \ 5 img039 | |
| The specifications and testing of a Scintilla windscreen wiper. | 14th May 1932 | Box 167 \ 5 img040 | |
| Payment for an electric screen wiper from Joseph Lucas Ltd. which was fitted to car 18-GIV for testing. | 6th Jun 1932 | Box 167 \ 5 img041 | |
| Double invoicing error by Lucas for a windscreen wiper alteration. | 8th Jun 1932 | Box 167 \ 5 img042 | |
| From Joseph Lucas Research Laboratories detailing the proposal and installation points for a new De Luxe Model S.W.R. type wiper system. | 18th Jan 1933 | Box 167 \ 5 img043 | |
| Return of a damaged Klaxon electric windscreen wiper motor for repair due to bad fitting. | 11th Feb 1933 | Box 167 \ 5 img044 | |
| Failures of electric windscreen wipers and a proposal to switch to a new Lucas model. | 22th Feb 1933 | Box 167 \ 5 img045 | |
| Performance and fitting of various electric screen wipers, comparing Klaxon and Lucas models. | 23th Feb 1933 | Box 167 \ 5 img046 | |
| Letter discussing the suitability of Lucas and Klaxon windscreen wipers for an experimental 'Bensport' car body. | 24th Feb 1933 | Box 167 \ 5 img047 | |
| Failures experienced with Klaxon electric screen wipers and plans for further endurance testing. | 24th Feb 1933 | Box 167 \ 5 img048 | |
| Reliability of Lucas RW.1 type wipers and mentioning upcoming tests on a Klaxon wiper. | 24th Feb 1933 | Box 167 \ 5 img049 | |
| The current consumption of screen wipers. | 28th Feb 1933 | Box 167 \ 5 img050 | |
| Current consumption figures for various types of Lucas 12-volt screenwipers. | 13th Feb 1933 | Box 167 \ 5 img051 | |
| Comparative tests on windscreen wipers from Lucas and Klaxon, noting excessive current draw. | 1st Mar 1933 | Box 167 \ 5 img052 | |
| Test report on a Klaxon TW082-12V windscreen wiper detailing overheating issues and component failure. | 3rd Mar 1933 | Box 167 \ 5 img053 | |
| Bench tests and the suitability of Lucas and Klaxon windscreen wipers for fitting behind the scuttle rail. | 3rd Mar 1933 | Box 167 \ 5 img054 | |
| Supplier issues with Messrs Lucas regarding the production of lamps. | 4th Mar 1933 | Box 167 \ 5 img055 | |
| Internal request to return a faulty Klaxon windscreen wiper for replacement after a bench test failure. | 4th Mar 1933 | Box 167 \ 5 img056 | |
| Performance comparison of Klaxon and Lucas dual windscreen wipers. | 14th Mar 1933 | Box 167 \ 5 img057 | |
| Requesting the despatch of a Lucas type RW windscreen wiper back to the manufacturer for inspection and testing. | 14th Mar 1933 | Box 167 \ 5 img058 | |
| Testing of windscreen wipers from suppliers Lucas and Klaxon. | 15th Mar 1933 | Box 167 \ 5 img059 | |
| Correspondence regarding the failure and testing of a Klaxon 12-volt electric windscreen wiper. | 17th Mar 1933 | Box 167 \ 5 img060 | |
| Comparing experimental electric windscreen wipers from Klaxon Ltd, one with a shunt wound motor and the other with a modified series wound motor. | 28th Mar 1933 | Box 167 \ 5 img061 | |
| Dispatch request for a windscreen wiper motor to Klaxon Ltd. | 28th Mar 1933 | Box 167 \ 5 img062 | |
| Requesting a further report on advance tests of two experimental Klaxon screen wipers. | 29th Mar 1933 | Box 167 \ 5 img063 | |
| Letter from Klaxon Ltd regarding the testing of motors and a query about gearbox mounting methods. | 31th Mar 1933 | Box 167 \ 5 img064 | |
| Letter to Klaxon Limited discussing the design of fixing lugs on a wiper gearbox. | 5th Apr 1933 | Box 167 \ 5 img065 | |
| The return of a Klaxon windscreen wiper motor for modification to an updated type. | 19th Apr 1933 | Box 167 \ 5 img066 | |
| Instructions for modifications to a Klaxon windscreen wiper gearbox. | 17th May 1933 | Box 167 \ 5 img067 | |
| Following up on an outstanding invoice from Klaxon Ltd. for windscreen wipers. | 7th Jun 1933 | Box 167 \ 5 img068 | |
| Invoice for two Klaxon Windscreen Wipers that have been fitted to a chassis. | 9th Jun 1933 | Box 167 \ 5 img069 | |
| Letter from TRICO-FOLBERTH LTD regarding the success of their wiper equipment in the Scottish Motor Rally. | 26th Jun 1933 | Box 167 \ 5 img070 | |
| Fitting instructions for the TRICO RESERVAC vacuum reservoir. | 1st Jan 1933 | Box 167 \ 5 img071 | |
| Installation and operation instructions for a Trico-Folberth RESERVAC wiper system. | 1st Jan 1933 | Box 167 \ 5 img072 | |
| Trico catalogue for windscreen wipers and components. | 1st Jan 1933 | Box 167 \ 5 img073 | |
| Advertisement leaflet for TRICO windscreen wipers, blades, and arms. | 1st Jan 1933 | Box 167 \ 5 img074 | |
| Leaflet advertising the Trico Tandem Attachment, a secondary windscreen wiper system. | 1st Jan 1933 | Box 167 \ 5 img075 | |
| Product information or packaging for a Trico Violite Non-Glare Mirror. | 1st Jan 1933 | Box 167 \ 5 img076 | |
| Advertisement leaflet for new non-glare improved interior and exterior driving mirrors. | 1st Jan 1933 | Box 167 \ 5 img077 | |
| Product information leaflet for a theft-proof, spare tyre-mounted mirror. | 14th Jul 1933 | Box 167 \ 5 img078 | |
| The modification and fitting of a Klaxon windscreen wiper to Bentley chassis No.I.B.4. | 14th Jul 1933 | Box 167 \ 5 img079 | |
| Letter from Klaxon Limited regarding issues with fitting a windscreen wiper W.9 to chassis 1 B/4. | 18th Jul 1933 | Box 167 \ 5 img080 | |
| Letter from Klaxon Limited regarding an enquiry for a Synchronous Motor. | 18th Jul 1933 | Box 167 \ 5 img081 | |
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