| Description | Date | Identifier | |
| Letter discussing the design and advantages of the Benjamin Co. Klaxon switch used in American cars. | 18th Aug 1921 | Box 48 \ 3 Scan022 | |
| Suggestion to modify the ignition switch to enforce the use of both ignition systems to avoid complaints of slow running. | 2nd Dec 1919 | Box 48 \ 3 Scan023 | |
| Proposal document outlining alterations for the American chassis, covering lubrication, battery, braking, and starter motor. | 2nd Dec 1919 | Box 48 \ 3 Scan024 | |
| Letter discussing the specifications of Exide batteries, proposing a new form factor, and providing test data. | 7th Oct 1920 | Box 48 \ 3 Scan025 | |
| Test results and specifications for the Model 6LXR-9-1 and Exide batteries. | 7th Oct 1920 | Box 48 \ 3 Scan026 | |
| Letter to Mr. Claude Johnson regarding battery capacity and generator performance issues. | 7th Oct 1920 | Box 48 \ 3 Scan027 | |
| Improvements to Exide batteries, comparing new Tudor and British Exide cells to the current standard. | 7th Mar 1921 | Box 48 \ 3 Scan028 | |
| Battery modifications and an examination of new Tudor batteries. | 17th Mar 1921 | Box 48 \ 3 Scan029 | |
| The construction and features of a received battery, comparing it to previous versions and specifications. | 7th Mar 1921 | Box 48 \ 3 Scan030 | |
| The performance of Exide and De Martis batteries, detailing issues and manufacturer claims. | 7th Mar 1921 | Box 48 \ 3 Scan031 | |
| Evaluation of a Ni-Fe Alkaline battery, detailing its construction and comparing its performance against an Exide battery. | 7th Mar 1921 | Box 48 \ 3 Scan032 | |
| List of battery weights and the capacity of a De Martis battery. | 7th Mar 1921 | Box 48 \ 3 Scan033 | |
| Listing the weights in pounds (lbs) for various types of batteries. | 7th Mar 1921 | Box 48 \ 3 Scan034 | |
| Requesting the cost of five different experimental sample batteries for a report being prepared for Mr. Royce. | 7th Mar 1921 | Box 48 \ 3 Scan035 | |
| Log sheet for the routine treatment and testing of a car battery. | 8th Mar 1921 | Box 48 \ 3 Scan036 | |
| Second charge and subsequent discharge cycle of a battery test. | 22th Mar 1921 | Box 48 \ 3 Scan037 | |
| Test report detailing battery cell densities, charge, and discharge measurements. | 22th Mar 1921 | Box 48 \ 3 Scan038 | |
| Data log recording cell densities before and after a fourth charge cycle. | 10th Mar 1921 | Box 48 \ 3 Scan039 | |
| From EFC to Wd/Ms cancelling a price request for a U.S.A. 6-LXR-9-1 Exide battery. | 10th Mar 1921 | Box 48 \ 3 Scan040 | |
| Assessment of the good and bad points of a U.S.A. Exide battery. | 4th Apr 1921 | Box 48 \ 3 Scan041 | |
| Cover letter forwarding a copy of a letter from America regarding batteries. | 11th May 1921 | Box 48 \ 3 Scan042 | |
| Letter from Rolls-Royce of America discussing the cost of an Exide battery and recommending a change to a Willard battery. | 26th Apr 1921 | Box 48 \ 3 Scan043 | |
| Test report on a U.S.A. Exide 6 LXR/9/1 battery, noting issues with burnt connections and high internal resistance. | 1st Jun 1921 | Box 48 \ 3 Scan044 | |
| Letter from The Electric Storage Battery Co. proposing a new type XXC battery for Rolls Royce of America cars. | 2nd Jun 1921 | Box 48 \ 3 Scan045 | |
| Letter from a battery supplier comparing the specifications and pricing of different battery models. | 7th Jun 1921 | Box 48 \ 3 Scan046 | |
| Graph showing terminal volts at the motor using various batteries and starter cables. | 7th Jun 1921 | Box 48 \ 3 Scan047 | |
| Letter to the Managing Director discussing test results of batteries and starter motors from Westinghouse, Exide, and Bijur. | 8th Jun 1921 | Box 48 \ 3 Scan048 | |
| Comparison of Westinghouse and Bijur starting motor and battery performance on the 4-EX model. | 11th Aug 1920 | Box 48 \ 3 Scan049 | |
| Page discussing starting motor characteristics, voltage curves, and Willard battery specifications. | 11th May 1930 | Box 48 \ 3 Scan050 | |
| Comparison of battery specifications, costs, and details of starter cables. | 28th Feb 1911 | Box 48 \ 3 Scan051 | |
| Battery position and starter cable for improved starting performance and weight reduction. | 17th Jul 1921 | Box 48 \ 3 Scan052 | |
| Letter discussing starter motor brake tests, comparing performance curves, efficiencies, and testing methodologies. | 17th Jul 1921 | Box 48 \ 3 Scan053 | |
| Battery and starter cable performance, comparing different models to S.A.E. standards, particularly under winter conditions. | 11th Aug 1920 | Box 48 \ 3 Scan054 | |
| Cold weather starting performance and suggesting further testing procedures. | 11th Aug 1920 | Box 48 \ 3 Scan055 | |
| Battery record log detailing service, testing, and performance from 1921. | 8th Mar 1921 | Box 48 \ 3 Scan056 | |
| Letter from Conner Magneto and Ignition Ltd. offering a sample of their new 6-cylinder magneto for testing. | 27th Oct 1920 | Box 48 \ 3 Scan057 | |
| Proposed meeting with the Managing Director of Conner Magneto Co. to discuss their magneto. | 11th Nov 1920 | Box 48 \ 3 Scan058 | |
| Arranging a meeting for Tuesday 16th to discuss the qualities of the 'Conner' magneto. | 12th Nov 1920 | Box 48 \ 3 Scan059 | |
| Letter to The Conner Magneto & Ignition Ltd. regarding comparative tests on a 6-cylinder magneto. | 16th Nov 1920 | Box 48 \ 3 Scan060 | |
| Forwarding two letters from Conner Magneto & Ignition Ltd. regarding an agreement and an interview. | 18th Nov 1920 | Box 48 \ 3 Scan061 | |
| Letter from Conner Magneto and Ignition Ltd. agreeing to supply magnetos for destructive testing under specific conditions. | 17th Nov 1920 | Box 48 \ 3 Scan062 | |
| Letter from Conner Magneto and Ignition Ltd. regarding a trial of an S.H.6170 type magneto. | 17th Nov 1920 | Box 48 \ 3 Scan063 | |
| The second page of a letter from Conner Magneto & Ignition Limited regarding their testing systems and inviting a visit. | 17th Nov 1920 | Box 48 \ 3 Scan064 | |
| Article from 'The Motor' magazine about a new C.M.I. magneto designed for effective ignition at low engine speeds in luxury cars. | 14th Jun 1920 | Box 48 \ 3 Scan065 | |
| Article discussing the design and performance of a magneto for deluxe cars, including a comparison graph. | 22th Sep 1920 | Box 48 \ 3 Scan066 | |
| From 'The Motor' magazine detailing the mechanism and operation of a new magneto impulse starter. | 22th Sep 1920 | Box 48 \ 3 Scan067 | |
| Page from 'The Motor' magazine illustrating luxurious examples of enclosed drive body designs. | 22th Sep 1920 | Box 48 \ 3 Scan068 | |
| Extract from a report discussing and comparing various types of magnetos from different manufacturers. | 1st Jan 1921 | Box 48 \ 3 Scan069 | |
| Pricing of Watford and Bosch magnetos and considering alternatives from B.T.H. and Conner. | 14th Jan 1921 | Box 48 \ 3 Scan070 | |
| Consideration and prioritisation of the C.M.1 'Conner' magneto. | 18th Jan 1921 | Box 48 \ 3 Scan071 | |
| Follow-up letter enquiring about a report on a C.M.1 Magneto. | 15th Jan 1921 | Box 48 \ 3 Scan072 | |
| Letter regarding the delayed testing of a C.M.1 Magneto and a request to expedite the process. | 26th Jan 1921 | Box 48 \ 3 Scan073 | |
| The preliminary bench testing of a 'Conner' C.M.1 Magneto. | 27th Jan 1921 | Box 48 \ 3 Scan074 | |
| Preliminary report on the Conner C.M.1 magneto. | 27th Jan 1921 | Box 48 \ 3 Scan075 | |
| Preliminary report on the Conner Magneto C.M.I., detailing its construction, weight and features compared to competing models. | 24th Jan 1921 | Box 48 \ 3 Scan076 | |
| Continued description of magneto pole-shoe operation and distributor gear wheel construction. | 4th Feb 1921 | Box 48 \ 3 Scan077 | |
| Failure of a 'Conner' magneto contact breaker lever during endurance testing. | 4th Feb 1921 | Box 48 \ 3 Scan078 | |
| Reply from Conner Magneto & Ignition Ltd. regarding a faulty contact breaker lever. | 8th Feb 1921 | Box 48 \ 3 Scan079 | |
| Test record detailing the design and performance of a Conner magneto. | 7th Mar 1921 | Box 48 \ 3 Scan080 | |
| Specifications for distributor, platinum point gap, and contact breaker timing. | 11th Aug 1940 | Box 48 \ 3 Scan081 | |
| Test results page showing endurance test observations and primary volt/ampere-speed curves. | 11th Aug 1926 | Box 48 \ 3 Scan082 | |
| Test report page detailing circuit tests, an RPM test, and a note about a failed contact-breaker lever. | 15th Jun 1931 | Box 48 \ 3 Scan083 | |
| High and low speed sparking characteristics, resistance values, and milli-ampere readings. | 27th Jul 1930 | Box 48 \ 3 Scan084 | |
| Specifications for platinum point gap and contact breaker timing. | 11th Aug 1930 | Box 48 \ 3 Scan085 | |
| Specifications for platinum point gap, contact breaker timing, and armature core flux. | 6th Jan 1921 | Box 48 \ 3 Scan086 | |
| Experimental bench tests of a Conner Type C.M.1 Magneto. | 19th Mar 1921 | Box 48 \ 3 Scan087 | |
| Results of various electrical tests on a magneto component, page 2. | 19th Mar 1921 | Box 48 \ 3 Scan088 | |
| Test report on the advance, retard, and sparking characteristics of an ignition component. | 19th Mar 1921 | Box 48 \ 3 Scan089 | |
| Experimental bench tests and assessment of three different magnetos. | 21th Mar 1921 | Box 48 \ 3 Scan090 | |
| Continued document discussing ranges and the results of bench tests on magnetos. | 21th Mar 1921 | Box 48 \ 3 Scan091 | |
| The performance curves and characteristics of various magnetos. | 18th May 1921 | Box 48 \ 3 Scan092 | |
| Comparison of low sparking speeds and bench test results for various magnetos, including Watford, Conner, and Bosch types. | 31th Mar 1921 | Box 48 \ 3 Scan093 | |
| Table of lowest speeds in RPM for regular firing of magnetos with 0.5mm gaps in air. | 22th Mar 1921 | Box 48 \ 3 Scan094 | |
| Comparative table of performance data for various magnetos, continued from a previous page. | 10th Dec 1920 | Box 48 \ 3 Scan095 | |
| Table of results detailing magneto performance tests. | 23th Mar 1921 | Box 48 \ 3 Scan096 | |
| Comparative data table for various magneto models and their performance characteristics. | 6th Jun 1919 | Box 48 \ 3 Scan097 | |
| Comparison table of test results for various magnetos, including Watford, Bosch, Dixie, Conner, and B.T.H. | 1st Jan 1919 | Box 48 \ 3 Scan098 | |
| Graph of open circuit volt-speed and short circuit ampere-speed curves for the primary windings of Dixie, B.T.H., and Conner magnetos. | 22th Mar 1920 | Box 48 \ 3 Scan099 | |
| Stamped document page from the Print Room. | 2nd Mar 1912 | Box 48 \ 3 Scan100 | |
| Favourable bench test results of a Conner C.M.1 magneto and the next steps for evaluation. | 4th Apr 1921 | Box 48 \ 3 Scan101 | |
| Letter quoting Conner Magneto & Ignition Ltd. regarding satisfactory tests and pricing for the Conner C.M.1 Magneto. | 7th Apr 1921 | Box 48 \ 3 Scan102 | |
| Comparing the performance and efficiency of various magnetos and suggesting alterations to the standard Watford magneto. | 9th Apr 1921 | Box 48 \ 3 Scan103 | |
| Arranging the return of a Conner C.M.1 Magneto as it was not superior to the current standard. | 18th Dec 1922 | Box 48 \ 3 Scan104 | |
| Instruction to return magneto No. 8263 to The Conner Magneto & Ignition Limited as it is of no use after testing. | 21th Dec 1922 | Box 48 \ 3 Scan105 | |
| Inquiry to Conner Magneto & Ignition Ltd. regarding magnetos with automatic ignition advance. | 4th Jul 1924 | Box 48 \ 3 Scan106 | |
| Letter from Peel-Conner Telephone Works stating they do not produce a magneto with automatic ignition advance. | 7th Jul 1924 | Box 48 \ 3 Scan107 | |
| Arguing against reducing the capacity of accumulators (batteries) due to charging inefficiencies at low speeds. | 10th Jan 1920 | Box 48 \ 3 Scan108 | |
| Importance of ordering custom-shaped accumulator grids from battery manufacturers. | 10th Jan 1920 | Box 48 \ 3 Scan109 | |
| Specifications and suitability of a Lucas Dynamo. | 14th Jan 1920 | Box 48 \ 3 Scan110 | |
| Dynamo performance, particularly weight, cut-in speed, and battery charging capability during town running. | 14th Jan 1920 | Box 48 \ 3 Scan111 | |
| Expressing urgent concern over the specifications of batteries and dynamos for the 40/50 chassis. | 16th Jan 1920 | Box 48 \ 3 Scan112 | |
| Extract discussing the effect of cold temperatures on battery capacity and recommending the use of larger batteries for the US market. | 3rd Jun 1920 | Box 48 \ 3 Scan113 | |
| Extract detailing electrical troubles with imported chassis, specifically a battery drain issue. | 19th Aug 1920 | Box 48 \ 3 Scan114 | |
| Extract detailing troubles experienced with electrical equipment on new chassis. | 19th Aug 1920 | Box 48 \ 3 Scan115 | |
| Letter from Rolls Royce of America regarding batteries running down on imported cars due to the dynamo belt stretching. | 3rd Sep 1920 | Box 48 \ 3 Scan116 | |
| Response to technical queries regarding battery drain, dynamo cut-in speeds, and drive belt adjustments. | 24th Sep 1920 | Box 48 \ 3 Scan117 | |
| Apparent weaknesses in an electrical system and the standardization of an improved dynamo. | 24th Sep 1920 | Box 48 \ 3 Scan118 | |
| Extract from a report from E.P. in the USA, detailing various vehicle faults for discussion. | 7th Oct 1920 | Box 48 \ 3 Scan119 | |
| Dynamo charging issues in post-war car chassis, specifically chassis 8-PP. | 7th Oct 1920 | Box 48 \ 3 Scan120 | |
| Page two of a letter discussing dynamo troubles, identifying the cause as belt issues. | 7th Oct 1920 | Box 48 \ 3 Scan121 | |
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