| Description | Date | Identifier | |
| Letter from Philco's Car Radio Division arranging a meeting to discuss silencing voltage regulators. | 8th Apr 1935 | Box 60 \ 3 Scan347 | |
| Order for a C.A.V. Voltage regulator type CJ1 with modified connections. | 9th Apr 1935 | Box 60 \ 3 Scan348 | |
| Follow-up letter to Joseph Lucas, Ltd. regarding condensers across C.A.V. Voltage regulators. | 10th Apr 1935 | Box 60 \ 3 Scan349 | |
| Covering letter to Joseph Lucas Ltd. enclosing a copy of a previous unanswered letter regarding C.A.V. voltage regulators. | 12th Apr 1935 | Box 60 \ 3 Scan350 | |
| Letter from Scintilla Limited confirming the despatch of a Constant Voltage Regulator. | 3rd May 1935 | Box 60 \ 3 Scan351 | |
| Letter from Scintilla Limited enclosing a diagram for a type XM240-1 1/2-12V regulator. | 4th May 1935 | Box 60 \ 3 Scan352 | |
| Requesting a covering order for a Scintilla dynamo voltage regulator supplied for experimental testing. | 7th May 1935 | Box 60 \ 3 Scan353 | |
| Loan of a Lucas Dynamo for inspection. | 12th Jan 1931 | Box 60 \ 4 Scan001 | |
| Hand-drawn wiring diagram for a Lucas E60 Dynamo. | 16th Jan 1931 | Box 60 \ 4 Scan002 | |
| Changes to the 15,000-mile test to better evaluate dynamo output by using the lamps for six hours daily. | 13th Jan 1931 | Box 60 \ 4 Scan003 | |
| Potential improvements for car dynamos by investigating German 'Bosch' voltage regulators. | 15th Jan 1931 | Box 60 \ 4 Scan004 | |
| Technical memo weighing the pros and cons of magneto ignition versus battery ignition. | 17th Jan 1931 | Box 60 \ 4 Scan005 | |
| Modifications to improve dynamo output at high speeds by altering the armature. | 9th Jan 1931 | Box 60 \ 4 Scan006 | |
| Comparison of inherently and externally regulated dynamo systems, referencing specific manufacturer examples like Bosch and Westinghouse. | 9th Jan 1931 | Box 60 \ 4 Scan007 | |
| Modifications to external regulator controls for dynamo battery systems, comparing dithering contacts with long-period vibrators. | 9th Jan 1931 | Box 60 \ 4 Scan008 | |
| Comparison of the relative heating and output of shunt wound versus battery controlled dynamos. | 9th Jan 1931 | Box 60 \ 4 Scan009 | |
| Dynamo output, charging schemes, and issues with headlamp power consumption. | 20th Jan 1931 | Box 60 \ 4 Scan010 | |
| Graph comparing the shape of dynamo output curves from Rolls-Royce and Lucas, plotted as ampere output versus miles per hour. | 4th Dec 1930 | Box 60 \ 4 Scan011 | |
| Follow-up memo regarding the delivery of a Lucas Dynamo in vehicle 18-G-4. | 21th Jan 1931 | Box 60 \ 4 Scan012 | |
| Acknowledging receipt of a Lucas E.60 Dynamo and apologising for delayed correspondence. | 22th Jan 1931 | Box 60 \ 4 Scan013 | |
| Letter from the American branch to the UK branch detailing generator testing procedures and amperage settings. | 26th Jan 1931 | Box 60 \ 4 Scan014 | |
| Graph of sample generator output curves, plotting Amps and Volts against Speed. | 26th Jan 1931 | Box 60 \ 4 Scan015 | |
| Graph of generator characteristics showing voltage and current against RPM. | 6th Sep 1929 | Box 60 \ 4 Scan016 | |
| The characteristics and output performance of Lucas dynamos, comparing them to existing machines. | 3rd Feb 1931 | Box 60 \ 4 Scan017 | |
| Comparison between the Lucas E.575 dynamo and an in-house design, focusing on winding and switching complexities. | 1st Feb 1931 | Box 60 \ 4 Scan018 | |
| Technical analysis of dynamo output curves, comparing different models and influencing factors. | 1st Feb 1931 | Box 60 \ 4 Scan019 | |
| Comparison of Lucas and in-house machine performance using output curves, weight, and temperature data. | 1st Feb 1931 | Box 60 \ 4 Scan020 | |
| Graph of output speed performance curves for various dynamos at 80°C. | 4th Feb 1931 | Box 60 \ 4 Scan021 | |
| Suggesting the acquisition and testing of a standard Lucas 3rd brush dynamo for comparison against their own. | 7th Feb 1931 | Box 60 \ 4 Scan022 | |
| Methods to improve dynamo output and performance. | 7th Feb 1931 | Box 60 \ 4 Scan023 | |
| Proposed modifications to the dynamo's dimensions and armature to improve performance. | 7th Feb 1931 | Box 60 \ 4 Scan024 | |
| Comparative performance of a Lucas dynamo against the company's own models. | 9th Feb 1931 | Box 60 \ 4 Scan025 | |
| Comparative analysis of various dynamos and outlining desired performance characteristics. | 11th Feb 1931 | Box 60 \ 4 Scan026 | |
| Testing of a Lucas dynamo and the need to obtain a more up-to-date model for analysis. | 12th Feb 1931 | Box 60 \ 4 Scan027 | |
| Standardisation of Lucas dynamo output and lamps for the 20/25 and P.2 chassis. | 3rd Feb 1931 | Box 60 \ 4 Scan028 | |
| Requesting to obtain a Lucas dynamo on loan for observations and tests. | 3rd Feb 1931 | Box 60 \ 4 Scan029 | |
| Letter to Rolls-Royce of America Inc. requesting further technical specifications for a generator. | 21th Feb 1931 | Box 60 \ 4 Scan030 | |
| Specifications and performance requirements for a dynamo, including amperage, voltage, and physical dimensions. | 21th Feb 1931 | Box 60 \ 4 Scan031 | |
| Letter to Mr. Burton of Rolls-Royce America concerning generator output specifications and design improvements. | 21th Feb 1931 | Box 60 \ 4 Scan032 | |
| Postscript to Mr. Burton of Rolls-Royce of America Inc. concerning dynamo output and headlamp consumption. | 21th Feb 1931 | Box 60 \ 4 Scan033 | |
| Car dynamo performance, output control at varying speeds, and potential design improvements. | 9th Mar 1931 | Box 60 \ 4 Scan034 | |
| Instructions regarding two dynamos of improved construction and their main features. | 16th Dec 1921 | Box 60 \ 4 Scan035 | |
| The performance and weight of a second 48 coil medium output machine. | 18th Mar 1931 | Box 60 \ 4 Scan036 | |
| Announcing an agreement between C.A.Vandervell and the Bosch Company to form a new firm, C.A.V.Bosch, and that the plan for Bosch to build a works in London has been dropped. | 18th Mar 1931 | Box 60 \ 4 Scan037 | |
| Two possibilities for series winding on the main poles of car dynamos. | 27th Mar 1931 | Box 60 \ 4 Scan038 | |
| Technical discussion about dynamo output curves, temperature performance, and alternative designs. | 27th Mar 1931 | Box 60 \ 4 Scan039 | |
| Analysis of dynamo and battery charging systems in relation to headlamp current demands. | 27th Mar 1931 | Box 60 \ 4 Scan040 | |
| Comparative analysis of a Lucas Dynamo Model C5-O Type N-O against a similar in-house machine, detailing dimensions and weight. | 30th Mar 1931 | Box 60 \ 4 Scan041 | |
| Technical comparison of electrical specifications between a Lucas machine and a Rolls Royce machine. | 1st Mar 1931 | Box 60 \ 4 Scan042 | |
| Technical comparison of a Lucas machine against a Rolls-Royce machine, detailing differences in construction and performance. | 30th Mar 1931 | Box 60 \ 4 Scan043 | |
| Analysis of dynamo charging rates and resistance stages, comparing different machine settings and associated risks. | 30th Mar 1931 | Box 60 \ 4 Scan044 | |
| Performance comparison of two machines, analysing their respective current output curves at different RPMs. | 30th Mar 1931 | Box 60 \ 4 Scan045 | |
| Illustration of an armature stamping for a Lucas model C5-O type N-O dynamo. | 25th Mar 1931 | Box 60 \ 4 Scan046 | |
| Graph showing output speed performance curves for 20/25 dynamos. | 25th Mar 1931 | Box 60 \ 4 Scan047 | |
| Modifications to a dynamo for a 40-50 HP chassis, including a new series winding. | 21th Apr 1931 | Box 60 \ 4 Scan048 | |
| Letter from Rolls-Royce of America detailing the specifications of a generator. | 28th Apr 1931 | Box 60 \ 4 Scan049 | |
| Letter discussing generator output issues and comparing American and English headlamp specifications. | 29th Apr 1931 | Box 60 \ 4 Scan050 | |
| Letter from the Chief Engineer in Springfield to Mr. Hives in Derby regarding a 'Two Rate Output Switching Scheme'. | 29th Apr 1931 | Box 60 \ 4 Scan051 | |
| Request for detailed specifications on Bosch car lighting dynamos, specifically third brush controlled models. | 7th May 1931 | Box 60 \ 4 Scan052 | |
| Page two of a letter to J.A. Stevens Ltd. requesting information on machine temperature and dimensions. | 9th May 1931 | Box 60 \ 4 Scan053 | |
| Letter from Bosch Limited to Messrs. Rolls-Royce Ltd. acknowledging receipt of a letter dated the 7th instant. | 9th May 1931 | Box 60 \ 4 Scan054 | |
| Letter to Rolls-Royce of America Inc. regarding a 'Two Rate Charge Scheme' for dynamo output. | 9th May 1931 | Box 60 \ 4 Scan055 | |
| Letter to Mr. Burton in Springfield, Mass. detailing a two-rate charging scheme for an N.2. series L.H. chassis. | 6th May 1931 | Box 60 \ 4 Scan056 | |
| The development and improvement of 40/50 and 25 HP dynamos. | 6th May 1931 | Box 60 \ 4 Scan057 | |
| The 40/50 car's electrical load, dynamo output, and battery charging under different driving conditions. | 6th May 1931 | Box 60 \ 4 Scan058 | |
| Improvements to the Lucas charging scheme and a proposal to modify the 20/25 dynamo. | 6th May 1931 | Box 60 \ 4 Scan059 | |
| Graph of output speed curves comparing a standard and an improved 48 coil machine. | 1st Dec 1930 | Box 60 \ 4 Scan060 | |
| Graph comparing the ampere output speed curves of a 56 coil machine versus a proposed 48 coil machine. | 1st Dec 1930 | Box 60 \ 4 Scan061 | |
| General report on dynamo technology, comparing Delco, Bosch, and Lucas models and their features. | 16th May 1931 | Box 60 \ 4 Scan062 | |
| Technical memorandum discussing improvements to the 40/50 & 25HP dynamos and headlamp circuits. | 19th May 1931 | Box 60 \ 4 Scan063 | |
| Letter from Bosch discussing suitable dynamo systems and requesting further vehicle specifications. | 20th May 1931 | Box 60 \ 4 Scan064 | |
| Page 2 of a letter from Bosch Limited regarding a dynamo. | 20th May 1931 | Box 60 \ 4 Scan065 | |
| Testing a dynamo with series winding. | 21th May 1931 | Box 60 \ 4 Scan066 | |
| Tests and solutions for maintaining dynamo output at high speeds. | 21th May 1931 | Box 60 \ 4 Scan067 | |
| Specifications for ordering a Bosch dynamo for a 40/50 car. | 1st Jun 1931 | Box 60 \ 4 Scan068 | |
| Test report on a 40/50 dynamo fitted with a series winding. | 2nd Jun 1931 | Box 60 \ 4 Scan069 | |
| Graph showing the output speed curves of a dynamo, with and without series field winding, for a Phantom II chassis. | 1st Jun 1931 | Box 60 \ 4 Scan070 | |
| Correcting car dynamo performance by adding resistance rather than altering the 3rd brush position. | 6th Apr 1931 | Box 60 \ 4 Scan071 | |
| Request for test results on a 40/50 HP Dynamo series winding with headlights as the load. | 5th Jun 1931 | Box 60 \ 4 Scan072 | |
| Test results for a dynamo with series winding, including attached performance curves. | 5th Jun 1931 | Box 60 \ 4 Scan073 | |
| Graph showing the output speed curves of a dynamo for a PII chassis under various test conditions. | 10th Jun 1931 | Box 60 \ 4 Scan074 | |
| Graph showing the output speed curves of a dynamo for a Phantom II chassis under three different winding configurations. | 1st Aug 1931 | Box 60 \ 4 Scan075 | |
| Confirmation of an order for a Bosch dynamo and the return of related correspondence. | 19th Jun 1931 | Box 60 \ 4 Scan076 | |
| Investigation of a dynamo problem and potential solutions for improving performance. | 24th Jun 1931 | Box 60 \ 4 Scan077 | |
| Experiment with series winding in circuit with lamps for a dynamo system. | 24th Jun 1931 | Box 60 \ 4 Scan078 | |
| Internal memorandum discussing the cost and necessity of suggested tests on experimental dynamo armatures. | 2nd Jul 1931 | Box 60 \ 4 Scan079 | |
| Dynamo performance with regard to field windings and armatures. | 3rd Jul 1931 | Box 60 \ 4 Scan080 | |
| Necessity of further experiments to increase dynamo output. | 3rd Jul 1931 | Box 60 \ 4 Scan081 | |
| Dynamo performance, issues with maintaining full charge at high speeds, and modifications offered to customers. | 7th Jul 1931 | Box 60 \ 4 Scan082 | |
| Proposal to increase the size of the 20/25 dynamo brush flexible due to increased output and mechanical failures. | 7th Jul 1931 | Box 60 \ 4 Scan083 | |
| Dynamo performance, battery overcharging risks, and potential solutions like thermostatic control. | 9th Jul 1931 | Box 60 \ 4 Scan084 | |
| Provisional patent for connecting headlamps via the series winding of a car dynamo. | 4th Aug 1931 | Box 60 \ 4 Scan085 | |
| Using headlamp circuits to assist with generator excitation via a series winding. | 11th Aug 1931 | Box 60 \ 4 Scan086 | |
| The results of three different dynamo armature windings and their performance characteristics. | 28th Aug 1931 | Box 60 \ 4 Scan087 | |
| Investigation into armatures and the use of series winding excited by headlamp current. | 29th Aug 1931 | Box 60 \ 4 Scan088 | |
| Graph showing dynamo output curves with varying armature slot sizes and wire gauges. | 1st Dec 1930 | Box 60 \ 4 Scan089 | |
| Test report on the dynamo auxiliary field winding. | 1st Sep 1931 | Box 60 \ 4 Scan090 | |
| Modifications to a series winding to improve electrical output under different driving conditions. | 1st Sep 1931 | Box 60 \ 4 Scan091 | |
| Graph of dynamo output speed curves showing the effect of series winding excited by headlamp current. | 1st Sep 1931 | Box 60 \ 4 Scan092 | |
| Request to Bosch Ltd for an instruction booklet concerning dynamo and battery ignition units. | 24th Oct 1931 | Box 60 \ 4 Scan093 | |
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