| Description | Date | Identifier | |
| Test results for intensive heating, preliminary breakdown, and primary current consumption of a coil. | 17th Aug 1931 | Box 164 \ 5 img074 | |
| Results of various electrical component tests including voltage and coil temperature. | 17th Aug 1931 | Box 164 \ 5 img075 | |
| Page from a report listing a breakdown test and the examination of windings. | 18th Aug 1931 | Box 164 \ 5 img076 | |
| Letter from Joseph Lucas detailing the turn ratio of an ignition coil and the availability of a new windscreen wiper. | 18th Aug 1931 | Box 164 \ 5 img077 | |
| Letter to The Joseph Lucas Research Laboratories acknowledging receipt of their letter and information. | 21th Aug 1931 | Box 164 \ 5 img078 | |
| Improved performance ignition coil and a new experimental outside primary coil design for a 25 HP car. | 11th Sep 1931 | Box 164 \ 5 img079 | |
| Requesting a follow-up on a proposal concerning coil ignition design for the 20/25 HP Chassis. | 2nd Sep 1931 | Box 164 \ 5 img080 | |
| Coil ignition for the 20/25 HP chassis, discussing the redesign of old electrical equipment and experimentation with a new coil. | 3rd Sep 1931 | Box 164 \ 5 img081 | |
| Letter to Joseph Lucas Research Laboratories requesting additional distributor contact points for testing ignition units. | 4th Sep 1931 | Box 164 \ 5 img082 | |
| Letter from Joseph Lucas Research Laboratories regarding the supply of distributor contacts for testing. | 8th Sep 1931 | Box 164 \ 5 img083 | |
| Letter to Joseph Lucas Research Laboratories questioning the design of a distributor's contact lever. | 29th Sep 1931 | Box 164 \ 5 img084 | |
| Letter from Joseph Lucas Limited regarding the insulation of a distributor's contact lever or screw. | 3rd Oct 1931 | Box 164 \ 5 img085 | |
| Requesting the removal of an ignition coil and ballast from chassis 19-CIV to investigate a mysterious fault. | 21th Oct 1931 | Box 164 \ 5 img086 | |
| Design of an ignition system and a cheaper sequence starter, mentioning the 'Peregrine' starter. | 27th Oct 1931 | Box 164 \ 5 img087 | |
| Requesting the production of two ignition coils with modified specifications. | 30th Oct 1931 | Box 164 \ 5 img088 | |
| The examination of competitor ignition coils and testing a new type of starter motor. | 30th Oct 1931 | Box 164 \ 5 img089 | |
| Sending two different ignition coils to Sir Henry Royce for examination. | 30th Oct 1931 | Box 164 \ 5 img090 | |
| Arranging for two foreign ignition coils to be sent to Sir Henry Royce for examination. | 3rd Nov 1931 | Box 164 \ 5 img091 | |
| Examination of various ignition coils to inform the design of a new coil. | 3rd Nov 1931 | Box 164 \ 5 img092 | |
| Design and construction details for the Delco-Remy ignition coil. | 3rd Nov 1931 | Box 164 \ 5 img093 | |
| Design and construction details for a De Jon ignition coil. | 3rd Nov 1931 | Box 164 \ 5 img094 | |
| Suggested scheme of windings for an outside primary ignition coil design. | 10th Nov 1931 | Box 164 \ 5 img095 | |
| Design and production requirements for an ignition coil for the 'Peregrine' car model. | 10th Nov 1931 | Box 164 \ 5 img096 | |
| Letter to Joseph Lucas Research Laboratories detailing test results and criticisms of a Lucas battery ignition system. | 20th Nov 1931 | Box 164 \ 5 img097 | |
| The disappointing electrical performance of an ignition coil, with results from laboratory tests. | 20th Nov 1931 | Box 164 \ 5 img098 | |
| Results of secondary voltage and endurance tests performed on an electrical coil. | 21th Nov 1931 | Box 164 \ 5 img099 | |
| Dispatch of a Lucas ignition distributor and coil to the stores for return to the Joseph Lucas Research Laboratories. | 21th Nov 1931 | Box 164 \ 5 img100 | |
| Despatch of two sets of Lucas battery ignition contact breaker points for Sir Henry Royce. | 21th Nov 1931 | Box 164 \ 5 img101 | |
| Test report summarizing the results and particulars of a Lucas battery ignition distributor and coil. | 23th Nov 1931 | Box 164 \ 5 img102 | |
| Ignition coil performance, comparing a Lucas coil with a ballast to other competitor models and noting its inferiority when hot. | 23th Nov 1931 | Box 164 \ 5 img103 | |
| Report comparing the performance of a Lucas ignition coil against other manufacturers' coils under various test conditions. | 23th Nov 1931 | Box 164 \ 5 img104 | |
| Change in design for electrical ignition coils and L.T. contact makers. | 28th Nov 1931 | Box 164 \ 5 img105 | |
| Letter from Joseph Lucas Ltd. regarding ignition system tests and a future meeting. | 3rd Dec 1931 | Box 164 \ 5 img106 | |
| Page 2 of a letter from Joseph Lucas Ltd. to Messrs. Rolls-Royce Ltd. | 3rd Dec 1931 | Box 164 \ 5 img107 | |
| The results of an endurance test on a Type VL.45 distributor and coil. | 3rd Dec 1931 | Box 164 \ 5 img108 | |
| 6-cylinder ignition equipment manufactured by Messrs Rolls Royce Ltd. | 3rd Dec 1931 | Box 164 \ 5 img109 | |
| The design and performance of distributor and ignition system components. | 3rd Dec 1931 | Box 164 \ 5 img110 | |
| Coil performance with details on current, inductance, and ballast design. | 3rd Dec 1931 | Box 164 \ 5 img111 | |
| Comparison of specifications for distributors and ignition coils. | 3rd Dec 1931 | Box 164 \ 5 img112 | |
| Note on distributor RPM performance figures and poor hot starting factors with a large condenser. | 3rd Dec 1931 | Box 164 \ 5 img113 | |
| Ignition coil analysis sheet. | 16th Dec 1931 | Box 164 \ 5 img114 | |
| Letter to Joseph Lucas Research Laboratories asking why coils are filled with pitch or bitumen, making them irreparable. | 16th Dec 1931 | Box 164 \ 5 img115 | |
| Letter from Joseph Lucas Limited discussing the use of bitumen for filling coils. | 21th Dec 1931 | Box 164 \ 5 img116 | |
| Letter from Joseph Lucas Limited discussing the technical specifications of a Q12 type non-ballasted coil. | 30th Dec 1931 | Box 164 \ 5 img117 | |
| Letter to Joseph Lucas Ltd. regarding ignition coils, ignition sets, and starter motor production tests. | 1st Jan 1932 | Box 164 \ 5 img118 | |
| Letter from Joseph Lucas Limited acknowledging receipt of a letter. | 4th Jan 1932 | Box 164 \ 5 img119 | |
| Comparison report between a 21000 turn secondary coil and a standard 18000 turn secondary coil. | 18th Jan 1932 | Box 164 \ 5 img120 | |
| Technical memorandum discussing alternative construction methods for an ignition coil core and windings. | 28th Jan 1932 | Box 164 \ 5 img121 | |
| Letter to Joseph Lucas Ltd. inquiring about the supplier and specifications of flat iron strips for ignition coil cores. | 1st Feb 1932 | Box 164 \ 5 img122 | |
| Letter from Joseph Lucas Limited identifying their supplier, Joseph Sankey & Sons Ltd, for 'Stalloy Iron' used in flat strips for ignition cores. | 3rd Feb 1932 | Box 164 \ 5 img123 | |
| The experimental construction of ignition coil cores using Stalloy iron strips. | 4th Feb 1932 | Box 164 \ 5 img124 | |
| Request for Stalloy iron strips from Joseph Sankey & Sons Ltd for ignition coil core experiments. | 1st Feb 1932 | Box 164 \ 5 img125 | |
| Proposal for a visit to Lucas Research Laboratories to discuss winding coils and making up condensers for automobile electrical equipment. | 5th Feb 1932 | Box 164 \ 5 img126 | |
| Letter to Joseph Lucas Ltd. proposing a collaborative visit to their research laboratories. | 9th Feb 1932 | Box 164 \ 5 img127 | |
| Letter from Joseph Lucas Research Laboratories arranging a visit to their works. | 10th Feb 1932 | Box 164 \ 5 img128 | |
| Standardisation of an ignition coil with 21,000 turns of 44 S.W.G. wire on the secondary to improve performance. | 5th Jan 1932 | Box 164 \ 5 img129 | |
| Letter to Joseph Lucas Research Laboratories discussing a Scintilla dynamo, Bijur system drive patents, and rubber for windscreen wiper blades. | 19th Feb 1932 | Box 164 \ 5 img130 | |
| Lucas high-frequency horns for a Phantom chassis and the acquisition of a condenser winding machine. | 19th Feb 1932 | Box 164 \ 5 img131 | |
| Visit to Messrs. Lucas to discuss automotive electrical components. | 20th Feb 1932 | Box 164 \ 5 img132 | |
| Letter from The Joseph Lucas Research Laboratories regarding various components including a dynamo, horns, and windscreen wipers. | 25th Feb 1932 | Box 164 \ 5 img133 | |
| Letter from Joseph Lucas Ltd. regarding the correct dimensions for spark gaps and enclosing a related paper. | 25th Feb 1931 | Box 164 \ 5 img134 | |
| The type and rotation of distributors required for condensers. | 29th Feb 1932 | Box 164 \ 5 img135 | |
| Request to obtain two standard Lucas ignition distributor condensers. | 25th Feb 1932 | Box 164 \ 5 img136 | |
| Technical memo discussing the design and positioning of the ignition wiring and coil. | 14th Mar 1932 | Box 164 \ 5 img137 | |
| Design proposals and challenges for an inside secondary ignition coil. | 17th Mar 1932 | Box 164 \ 5 img139 | |
| Design proposals for the Japan 3 and Peregrine ignition coil, focusing on the iron core and magnetic circuit. | 8th Mar 1932 | Box 164 \ 5 img140 | |
| Letter from Joseph Lucas Research Laboratories regarding the rescheduling of a conference. | 25th Mar 1932 | Box 164 \ 5 img141 | |
| Letter to Joseph Lucas Ltd. arranging a meeting for the 6th of April. | 30th Mar 1932 | Box 164 \ 5 img142 | |
| Ignition system issues, including coil design, spark plug gaps, and slow-speed failures. | 2nd Apr 1932 | Box 164 \ 5 img143 | |
| Requesting the production of two ignition coils, listing the required parts and materials. | 11th Apr 1932 | Box 164 \ 5 img144 | |
| Query regarding the effectiveness of a modified ignition coil for high compression engines. | 11th Apr 1932 | Box 164 \ 5 img145 | |
| Poor quality of Parafin Wax for ignition coils and a proposal to test samples from a new supplier. | 14th Apr 1932 | Box 164 \ 5 img146 | |
| Clarifying a discrepancy and communication breakdown regarding the number of turns specified for an ignition coil. | 14th Apr 1932 | Box 164 \ 5 img147 | |
| Clarifying a misunderstanding about the number of turns in an ignition coil's secondary winding. | 16th Apr 1932 | Box 164 \ 5 img148 | |
| Comparative test on two paraffin wax samples for ignition coil impregnation. | 20th Apr 1932 | Box 164 \ 5 img149 | |
| The comparative insulation tests of two different paraffin wax samples. | 26th Aug 1932 | Box 164 \ 5 img150 | |
| Order request for enamelled copper wire for an experimental ignition coil. | 26th Aug 1932 | Box 164 \ 5 img151 | |
| Increased insulation for the standard ignition coil D.72503. | 9th Jun 1932 | Box 164 \ 5 img152 | |
| To Roy stating a lack of interest in coils, with an attached letter from Enfield Equipment Co.Ltd. | 23th Jun 1932 | Box 164 \ 5 img153 | |
| Letter to Joseph Lucas Ltd. about receiving an incorrect ignition coil and distributor, and requesting an exchange. | 6th Jul 1932 | Box 164 \ 5 img154 | |
| Letter from Joseph Lucas Ltd. concerning an ignition coil and distributor. | 7th Jul 1932 | Box 164 \ 5 img155 | |
| Preliminary tests on the new type J.3 and Peregrine ignition coil. | 1st Sep 1932 | Box 164 \ 5 img156 | |
| Requesting further J.3 and Peregrine ignition coils and suggesting a modification to the magnetic circuit. | 1st Sep 1932 | Box 164 \ 5 img157 | |
| Inspection and test report for a Lucas Ignition Distributor Type X3-1. | 5th Oct 1932 | Box 164 \ 5 img158 | |
| Instructions regarding spring trouble in a Derby connection, detailing the construction and adjustment of the distributor lever mechanism. | 8th Dec 1944 | Box 164 \ 5 img159 | |
| Inspection report on a distributor's machined iron casting, detailing ventilation, lubrication, contact gap, and make-ratio. | 8th Dec 1924 | Box 164 \ 5 img160 | |
| Report detailing the construction and specifications of a condenser and distributor rotor. | 8th Dec 1924 | Box 164 \ 5 img161 | |
| Instructions and a diagram showing the relative position of rotor and distributor segments when the points are just breaking. | 22th Oct 1932 | Box 164 \ 5 img162 | |
| Request to return a faulty Lucas M3/O ignition coil that broke down during experimental testing. | 22th Oct 1932 | Box 164 \ 5 img163 | |
| Letter to Messrs Lucas Ltd regarding a faulty six-cylinder ignition coil that broke down during testing. | 22th Oct 1932 | Box 164 \ 5 img164 | |
| 500-hour endurance test for a Lucas Distributor Type X3-1. | 4th Nov 1932 | Box 164 \ 5 img165 | |
| The condition of a distributor, comparing it to the Peregrine and a new double-breaker model. | 8th Dec 1924 | Box 164 \ 5 img166 | |
| Continued report on the condition of distributor components, including the rotor blade and rubbing blocks. | 8th Dec 1924 | Box 164 \ 5 img167 | |
| Letter from Joseph Lucas Ltd. arranging a meeting to discuss a paper on ignition coil discharge. | 22th Mar 1933 | Box 164 \ 5 img168 | |
| Request for three iron cores of Stalloy strip for testing a new type R.R. ignition coil. | 22th Mar 1933 | Box 164 \ 5 img169 | |
| Recommended modifications for a new universal standard ignition coil following laboratory testing. | 4th Apr 1933 | Box 164 \ 5 img170 | |
| Coil design, discussing primary winding temperature, resistance, and suggestions for improvement. | 4th Apr 1933 | Box 164 \ 5 img171 | |
| Requesting a design review for an external primary ignition coil. | 5th Apr 1933 | Box 164 \ 5 img172 | |
| Results of high-temperature tests on a Bosch porcelain insulator versus a Bakelite insulator for a new ignition coil. | 10th Apr 1933 | Box 164 \ 5 img173 | |
| Correct terminal markings for a spare ignition coil for Bensport. | 20th Apr 1933 | Box 164 \ 5 img174 | |
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