| Description | Date | Identifier | |
| Performance and issues of various battery ignition systems, specifically Delco, in comparison to magnetos. | 16th May 1921 | Box 37 \ 1 scan 112 | |
| The utility test of a slate slab used to simulate leakage on magneto and battery ignition systems. | 2nd Jun 1922 | Box 37 \ 1 scan 113 | |
| Extract from a report on ignition system leakage and spark gap performance. | 14th Nov 1921 | Box 37 \ 1 scan 114 | |
| Test report on slate resistance and its effect on ignition spark gaps for a utility test. | 14th Nov 1921 | Box 37 \ 1 scan 115 | |
| Continued page on comparative utility tests for battery and magneto ignition systems, and the difficulty of measuring resistance. | 1st Aug 1921 | Box 37 \ 1 scan 116 | |
| Inquiry about the performance and market resistance of cars fitted with only battery ignition in India. | 1st Aug 1921 | Box 37 \ 1 scan 117 | |
| Letter to Mr. Peat in Australia requesting feedback on cars fitted with battery-only ignition. | 1st Aug 1921 | Box 37 \ 1 scan 118 | |
| Letter discussing magneto ignition issues, spark plug oxidisation, and a proposed solution using a Delco switch. | 4th Aug 1921 | Box 37 \ 1 scan 119 | |
| Letter discussing the benefits of the Benjamin Klaxon switch over the existing starter button. | 18th Aug 1921 | Box 37 \ 1 scan 120 | |
| Fire risk and usability of the ignition switch position on the steering column. | 10th Oct 1921 | Box 37 \ 1 scan 121 | |
| Forwarding a letter from the representative in India regarding cars fitted only with battery ignition. | 10th Oct 1921 | Box 37 \ 1 scan 122 | |
| Report from the Delhi service depot on the market preference for magneto ignition over battery ignition in India. | 15th Sep 1921 | Box 37 \ 1 scan 123 | |
| Arguing against battery-only ignition systems, citing the lack of charging facilities and frequent battery failures. | 15th Sep 1921 | Box 37 \ 1 scan 124 | |
| Letter advising against battery ignition for cars in Australia, contrasting the conditions with America. | 9th Sep 1921 | Box 37 \ 1 scan 125 | |
| Technical report discussing the advantages and disadvantages of magneto versus battery ignition systems. | 9th Sep 1921 | Box 37 \ 1 scan 126 | |
| Letter discussing reasons for battery failure and proposing alternative starting mechanisms for vehicles. | 19th Sep 1921 | Box 37 \ 1 scan 127 | |
| Invitation from Automotive Products Company to visit their stand at the Motor Exhibition. | 2nd Nov 1921 | Box 37 \ 1 scan 128 | |
| Investigation into engine starting difficulties in cold weather and a request for a new battery. | 15th Nov 1921 | Box 37 \ 1 scan 129 | |
| Continued report on the ignition efficiency of a small pump engine, comparing magneto and battery systems. | 15th Nov 1921 | Box 37 \ 1 scan 130 | |
| List of effects to be considered for battery ignition systems. | 17th Jan 1922 | Box 37 \ 1 scan 131 | |
| Technical description and performance analysis of an annular spark gap. | 26th Jan 1922 | Box 37 \ 1 scan 132 | |
| Report page detailing issues with obtaining regular sparking and the unsuitability of a specific spark gap for general use. | 23th Nov 1921 | Box 37 \ 1 scan 133 | |
| Outlining the requirements for a battery ignition system on the Goshawk engine. | 14th Feb 1922 | Box 37 \ 1 scan 134 | |
| Analysis of the Delage car's ignition system, comparing magneto and battery ignition options. | 26th Jun 1922 | Box 37 \ 1 scan 135 | |
| Philbrin battery ignition system and an attached pamphlet. | 8th Nov 1922 | Box 37 \ 1 scan 136 | |
| Brochure for Philbrin coil ignition systems detailing available types, prices, and the sole concessionnaires. | 8th Nov 1922 | Box 37 \ 1 scan 137 | |
| Technical overview of the Philbrin Coil Ignition system, detailing its components, features, and operation. | 8th Nov 1922 | Box 37 \ 1 scan 138 | |
| Family tree diagram of battery ignition and coil part numbers. | 13th Nov 1922 | Box 37 \ 1 scan 139 | |
| Series of design suggestions for the Goshawk and other battery ignition systems to mitigate H.T. losses. | 13th Nov 1922 | Box 37 \ 1 scan 140 | |
| Letter discussing testing condenser materials, coil construction modifications, and issues with ignition at slow speeds. | 13th Nov 1922 | Box 37 \ 1 scan 141 | |
| Coil performance, testing methods, and standardisation for the Goshawk engine. | 3rd Nov 1922 | Box 37 \ 1 scan 142 | |
| Trial report on a standard test gap for magnetos and coil ignition systems. | 8th Feb 1923 | Box 37 \ 1 scan 143 | |
| Experimental work testing the effect of an external gap on magneto and coil sparking performance. | 8th Mar 1923 | Box 37 \ 1 scan 144 | |
| Tests on a chemical leak for a standard gap, analyzing the variation of its conductance with temperature. | 8th Mar 1923 | Box 37 \ 1 scan 145 | |
| The conductance of a chemical leak, detailing measurements at various temperatures. | 14th Mar 1923 | Box 37 \ 1 scan 146 | |
| American battery ignition systems, discussing power consumption, components, materials, and comparison to magnetos. | 4th Mar 1924 | Box 37 \ 1 scan 147 | |
| Short lifespan of platinum points in the electrical system and suggesting design improvements. | 11th May 1925 | Box 37 \ 1 scan 148 | |
| Mr. Royce's remarks on corrosion and H.T. tracking issues in EAC battery ignition distributor mouldings. | 1st Aug 1925 | Box 37 \ 1 scan 149 | |
| Electrical troubles regarding magneto platinum points and battery ignition points. | 14th Feb 1927 | Box 37 \ 1 scan 150 | |
| Report concerning the usage of high tension distributor points and dynamo brushes for the 20 HP model. | 28th Jun 1927 | Box 37 \ 1 scan 151 | |
| Responding to a query on the electrical system's capacity and dynamo output for a 20 HP car, GLK-46. | 28th Jun 1927 | Box 37 \ 1 scan 152 | |
| Letter to The Lucas Electrical Co. discussing the reasons for the continued manufacture of battery ignition systems. | 26th Jun 1927 | Box 37 \ 1 scan 153 | |
| Page 2 of a letter discussing experiments and issues with battery ignition systems and dynamo armatures. | 1st Jul 1927 | Box 37 \ 1 scan 154 | |
| Letter from Joseph Lucas Research Laboratories discussing investigations into battery and coil ignition systems. | 1st Jul 1927 | Box 37 \ 1 scan 155 | |
| Letter from Joseph Lucas Ltd. discussing developments in battery ignition systems and quiet running dynamos. | 1st Jul 1927 | Box 37 \ 1 scan 156 | |
| Letter to Joseph Lucas Ltd. concerning battery ignition system contact points and the 'make' vs 'break' period. | 6th Jul 1927 | Box 37 \ 1 scan 157 | |
| Article on recent developments and requirements for aircraft ignition-systems. | 1st Jul 1927 | Box 37 \ 1 scan 158 | |
| Page discussing headlighting performance on wet roads and the development of transcontinental highways. | 1st Jul 1927 | Box 37 \ 1 scan 159 | |
| Paper on recent aircraft-ignition developments, discussing design and electrical requirements. | 1st Jul 1927 | Box 37 \ 1 scan 160 | |
| Journal page discussing ignition systems, insulation for supercharged engines, and radio shielding. | 1st Jul 1927 | Box 37 \ 1 scan 161 | |
| Recent developments in aircraft ignition systems and radio-shielding principles. | 1st Jul 1927 | Box 37 \ 1 scan 162 | |
| Investigation into fire hazards from airplane ignition systems and the development of fire-proofing methods for magnetos. | 1st Jul 1927 | Box 37 \ 1 scan 163 | |
| Page from a publication discussing recent developments in aircraft engine ignition systems, including double magnetos and spark plug terminals. | 1st Jul 1927 | Box 37 \ 1 scan 164 | |
| Page from a journal detailing Splitdorf and Scintilla double magnetos for aircraft engines. | 1st Jul 1927 | Box 37 \ 1 scan 165 | |
| Recent developments in aircraft ignition systems and high-speed breaker mechanisms. | 1st Jul 1927 | Box 37 \ 1 scan 166 | |
| Page from an engineering journal discussing the development and timing method for a pivotless breaker in high-speed engines. | 1st Jul 1927 | Box 37 \ 1 scan 167 | |
| Technical bulletin on recent aircraft ignition developments, focusing on magnetos and the Liberty-12 Delco ignition-distributor. | 1st Jul 1927 | Box 37 \ 1 scan 168 | |
| Page from an automotive engineering journal comparing battery versus magneto ignition systems, and detailing distributor designs. | 1st Jul 1927 | Box 37 \ 1 scan 169 | |
| Recent aircraft ignition developments, including weight comparisons of various systems and specifications for an ideal system. | 1st Jul 1927 | Box 37 \ 1 scan 170 | |
| Page from The Journal of the Society of Automotive Engineers discussing ignition systems and foremanship courses. | 1st Jul 1927 | Box 37 \ 1 scan 171 | |
| Quoting a letter from Mr. Olley regarding the performance of ignition coils, with and without ballast resistance. | 9th Nov 1927 | Box 37 \ 1 scan 172 | |
| Improvements to a battery ignition system, including contacts, distributor, and coil construction. | 12th Dec 1927 | Box 37 \ 1 scan 173 | |
| Current experiments on ignition system components including ballast resistance, coils, condensers, contact breakers, distributors, and magnetos. | 6th Mar 1928 | Box 37 \ 1 scan 174 | |
| Continued document outlining comparative tests on High Tension (H.T.) wiring for chassis and aero applications. | 21th Oct 1929 | Box 37 \ 1 scan 175 | |
| Extract from H.E. West's report on the 1929 Motor Show at Olympia, detailing a dual ignition device from S.E.V. Co. | 21th Oct 1929 | Box 37 \ 1 scan 176 | |
| Family tree diagram of battery ignition and coil part numbers. | 17th Feb 1930 | Box 37 \ 1 scan 177 | |
| Letter from W. D. Foster & Co. regarding a new ALCO Combined Magneto and Battery Ignition Unit. | 17th Feb 1930 | Box 37 \ 1 scan 178 | |
| Business letter from W. D. Foster & Co. discussing aeroplane magneto failures and proposing a new instrument. | 17th Feb 1930 | Box 37 \ 1 scan 179 | |
| Product specification sheet for the S.E.V. 'ALCO' ignition apparatus. | 17th Feb 1930 | Box 37 \ 1 scan 180 | |
| Dimensional drawing for an ALCO distributor for 4 and 6 cylinder engines. | 18th Feb 1930 | Box 37 \ 1 scan 181 | |
| Letter to Messrs. W.D. Foster & Co. declining interest in the ALCO Combined Magneto and Battery Ignition Unit. | 18th Feb 1930 | Box 37 \ 1 scan 182 | |
| Design and potential benefits of the 'Mallory' battery igniter. | 25th Jun 1930 | Box 37 \ 1 scan 183 | |
| Requesting a Mallory igniter for comparative laboratory testing. | 23th Jul 1930 | Box 37 \ 1 scan 184 | |
| Battery ignition sparking plug voltage tests carried out on 20/25 and 40/50 chassis. | 5th Dec 1930 | Box 37 \ 1 scan 185 | |
| Test report on sparking plug performance on experimental Phantom II and production 20/25 chassis. | 5th Dec 1930 | Box 37 \ 1 scan 186 | |
| Test results comparing plug voltage at different plug gaps and water temperatures. | 5th Dec 1930 | Box 37 \ 1 scan 187 | |
| Test results for sparking plug voltages on a 20/25 HP chassis at different plug gaps. | 5th Dec 1930 | Box 37 \ 1 scan 188 | |
| Ignition coil performance, voltage output, and spark plug gap settings for battery ignition engines. | 5th Dec 1930 | Box 37 \ 1 scan 189 | |
| Recommendation to experiment with a higher voltage ignition coil to address engine missing issues on various chassis. | 8th May 1931 | Box 37 \ 1 scan 190 | |
| Arranging for a visit to Cricklewood to improve electrical fault diagnosis procedures. | 8th May 1931 | Box 37 \ 1 scan 191 | |
| Ignition faults on customer chassis and the issue of non-faulty components being returned for repair. | 8th May 1931 | Box 37 \ 1 scan 192 | |
| Instructing repair depots on the preliminary checks to perform for ignition troubles before removing units. | 8th May 1931 | Box 37 \ 1 scan 193 | |
| New procedure for diagnosing battery ignition troubles on customer chassis, particularly for the 20/25 HP model. | 20th May 1931 | Box 37 \ 1 scan 194 | |
| Battery ignition troubles and the possibility of issuing volt meters to engineers and testers. | 23th May 1931 | Box 37 \ 1 scan 195 | |
| New suggested method for diagnosing battery ignition troubles on customer chassis. | 23th May 1931 | Box 37 \ 1 scan 196 | |
| Suggested procedure for tracing ignition troubles on a customer's chassis. | 23th May 1931 | Box 37 \ 1 scan 197 | |
| Visit to Cricklewood to resolve misunderstandings regarding the diagnosis of faulty electrical ignition components. | 23th May 1931 | Box 37 \ 1 scan 198 | |
| Continued discussion on customer complaints regarding a starter, switchbox repairs, and ignition failures. | 23th May 1931 | Box 37 \ 1 scan 199 | |
| Confirming the provision of a free set of H.T. spark gaps and an old 20 HP battery ignition distributor to a Mr. Kemp. | 2nd Jun 1931 | Box 37 \ 1 scan 200 | |
| Visit to Messrs. Lucas to discuss technical collaboration, testing facilities, and components. | 5th Jun 1931 | Box 37 \ 1 scan 201 | |
| The design and performance of horns, battery ignition, headlamps, and windscreen wipers. | 5th Jun 1931 | Box 37 \ 1 scan 202 | |
| Re-arranged proportions for a Battery Ignition H.T. Rotor Drive to facilitate production. | 8th Jun 1931 | Box 37 \ 1 scan 203 | |
| Letter to the British Thomson-Houston Co. Ltd. regarding the ignition system of a Daimler double six. | 18th Aug 1931 | Box 37 \ 1 scan 204 | |
| Design modification for the Peregrine engine's battery ignition system. | 12th Jan 1932 | Box 37 \ 1 scan 205 | |
| Causes and potential remedies for ignition missing fire at slow speed. | 16th Apr 1932 | Box 37 \ 1 scan 206 | |
| Potential advantages of a suction-operated ignition control switch for cars and aircraft. | 20th Sep 1932 | Box 37 \ 1 scan 207 | |
| Advertising leaflet for the UTEX Ignition Switch, a safety device for vehicles. | 20th Sep 1932 | Box 37 \ 1 scan 208 | |
| Advertisement leaflet for a UTEX suction-operated ignition switch, detailing its benefits and installation. | 21th Sep 1932 | Box 37 \ 1 scan 209 | |
| Arguing against the fitting of a suction-operated ignition control switch, citing modern alternatives and increased unreliability. | 21th Sep 1932 | Box 37 \ 1 scan 210 | |
| Advantages of implementing an automatic ignition advance and retard system. | 28th Feb 1920 | Box 37 \ 1 scan 211 | |
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