| Description | Date | Identifier | |
| Complaining about the over-oiling of occasionally used experimental motors, which causes a mess, and requests a change in procedure. | 14th Jan 1919 | Box 61 \ 2 scan0017 | |
| Notifying that a D.C. motor is ready and requesting it be moved from the shop. | 11th Nov 1919 | Box 61 \ 2 scan0018 | |
| From EFC to RHC urgently requesting a small motor for magneto bench testing for the Experimental Department. | 28th Apr 1920 | Box 61 \ 2 scan0019 | |
| Confirming a small motor for a Magneto Test has been sent, noting the absence of brush gear. | 1st Jul 1920 | Box 61 \ 2 scan0020 | |
| Order for one dozen Morganite brushes from the Morgan Crucible Company. | 1st Jul 1920 | Box 61 \ 2 scan0021 | |
| Confirmation of a request to design brush gear for a small experimental motor. | 22th Jul 1920 | Box 61 \ 2 scan0022 | |
| Blueprint for the new brush gear of the Royce Motor. | 1st Aug 1920 | Box 61 \ 2 scan0023 | |
| Request for blueprints and parts for a Royce motor's brush gear for experimental use. | 24th Aug 1920 | Box 61 \ 2 scan0024 | |
| RHC to EFC confirming a small Royce Motor is finished and passed to their department. | 13th Jan 1921 | Box 61 \ 2 scan0025 | |
| Confirming arrangements for the repair of a motor for the bench ignition drive and subsequent fitting of a pulley. | 2nd Nov 1923 | Box 61 \ 2 scan0026 | |
| Request to replace wire used for rewinding a driving motor in the Electrical Experimental Laboratory. | 12th Nov 1923 | Box 61 \ 2 scan0027 | |
| Short circuit fault in an experimental driving motor and requesting a re-wind. | 15th Nov 1923 | Box 61 \ 2 scan0028 | |
| Requesting a modification to a dynamo driving motor bearing. | 29th Jun 1925 | Box 61 \ 2 scan0029 | |
| Requesting and detailing two quotations for a 1 HP, 200-volt, three-phase motor for a small charging plant. | 22th Jul 1927 | Box 61 \ 2 scan0030 | |
| 3-pole switch for a starter and the urgent requirement for a motor. | 13th Jun 1928 | Box 61 \ 2 scan0031 | |
| From EFC to Hy. requesting enquiries and quotations for D.C. motors. | 13th Jun 1928 | Box 61 \ 2 scan0032 | |
| Chasing an unanswered enquiry regarding 3 B.HP D.C. motors, with handwritten follow-up notes. | 19th Jul 1928 | Box 61 \ 2 scan0033 | |
| Specifications for a 3 B.HP motor for the Experimental Department. | 20th Jul 1928 | Box 61 \ 2 scan0034 | |
| Request for a revised quotation for a D.C. motor and its associated control equipment. | 20th Jul 1928 | Box 61 \ 2 scan0035 | |
| Wiring diagram for a 110 Volt 3 B.HP D.C. motor control board. | 26th Jul 1928 | Box 61 \ 2 scan0036 | |
| Specifications and suitability of a variable speed 3 B.HP motor from Crypto Electrical Co. Ltd. | 26th Jul 1928 | Box 61 \ 2 scan0037 | |
| The specification and control board for a 3 B.HP D.C. motor for the Experimental Department. | 16th Aug 1928 | Box 61 \ 2 scan0038 | |
| Quotation for a 3 B.HP motor and regulator gear from The Crypto Electrical Co. Ltd. | 25th Jul 1928 | Box 61 \ 2 scan0039 | |
| Specifications and test results for a 3 B.HP D.C. Plant Motor and its regulating resistances. | 9th Nov 1928 | Box 61 \ 2 scan0040 | |
| Test results detailing the ranges of speed obtained on a Crypto D.C. variable speed motor. | 13th Nov 1928 | Box 61 \ 2 scan0041 | |
| The speed ranges of a Crypto D.C. variable speed motor under different regulator settings. | 13th Nov 1928 | Box 61 \ 2 scan0042 | |
| Two types of very small synchronous motors, their specifications, and pricing. | 17th Jul 1929 | Box 61 \ 2 scan0043 | |
| Request to arrange an overhaul for the large dynamo test rig motor, specifically the commutator and bearings. | 18th Sep 1929 | Box 61 \ 2 scan0044 | |
| Article from 'The Electrical Review' about the characteristic features of available types of single-phase motors. | 27th Sep 1929 | Box 61 \ 2 scan0045 | |
| Article from 'The Electrical Review' analysing world electrical exports from a German perspective, with data from 1913 to 1928. | 27th Sep 1929 | Box 61 \ 2 scan0046 | |
| Page from The Electrical Review discussing the theory and operation of various types of electric motors. | 27th Sep 1929 | Box 61 \ 2 scan0047 | |
| Page from The Electrical Review discussing single-phase repulsion motors and a report on lightning and transmission lines. | 27th Sep 1929 | Box 61 \ 2 scan0048 | |
| Test readings and observations for a variable frequency induction motor transformer with a three-phase stator and a single-phase rotor. | 29th Oct 1929 | Box 61 \ 2 scan0049 | |
| Instructions and wiring diagram for a 210 volt DC 'Modern' Motor. | 4th Nov 1929 | Box 61 \ 2 scan0050 | |
| Faulty Rotax armature from a fan motor that needs to be rectified. | 3rd Dec 1929 | Box 61 \ 2 scan0051 | |
| Request to purchase a second variable speed D.C. motor for testing auxiliaries. | 26th Oct 1931 | Box 61 \ 2 scan0052 | |
| Quotation for a 3 B.HP motor and regulator gear from The Crypto Electrical Co. Ltd. | 1st Jul 1928 | Box 61 \ 2 scan0053 | |
| Approval to order a small three HP variable speed D.C. motor for testing auxiliaries. | 27th Oct 1931 | Box 61 \ 2 scan0054 | |
| Internal request to order a protected type shunt wound interpolar motor and accessories from Crypto Electrical Co Ltd. | 2nd Nov 1931 | Box 61 \ 2 scan0055 | |
| Letter to Small Electric Motors Ltd. requesting connection and operational details for a regulating motor. | 13th Nov 1931 | Box 61 \ 2 scan0056 | |
| Letter from Small Electric Motors Ltd. regarding an Air Ministry Regulating Motor, unable to provide a connection diagram. | 16th Nov 1931 | Box 61 \ 2 scan0057 | |
| Request to order enamelled copper wire to rewind a failed field coil on a Crypto electric motor. | 20th Nov 1931 | Box 61 \ 2 scan0058 | |
| Urgent internal order for enamelled copper wire for repairs to a Crypto electric motor. | 21th Nov 1931 | Box 61 \ 2 scan0059 | |
| Request to arrange for the urgent repair of a Crypto Motor with a shorted field coil. | 7th Dec 1931 | Box 61 \ 2 scan0060 | |
| Request to arrange repairs for a Crypto motor for the Electrical Experimental Laboratory. | 7th Dec 1931 | Box 61 \ 2 scan0061 | |
| Difficulties with a new Crypto motor in the Experimental Department, suspecting the wrong type was supplied. | 19th Dec 1931 | Box 61 \ 2 scan0062 | |
| Design options for a lighting battery ignition system for a marine engine. | 23th Jan 1913 | Box 61 \ 2 scan0063 | |
| The testing of a Peto & Radford dynamo and Mr. Royce's displeasure with testing too many lighting sets. | 7th May 1913 | Box 61 \ 2 scan0064 | |
| Requesting a comparison of Edison cells versus lead accumulators for use in a lighting set. | 14th Jun 1913 | Box 61 \ 2 scan0065 | |
| Letter to a customer regarding car repairs and explaining the functionality of the lighting dynamo and battery. | 18th Jun 1913 | Box 61 \ 2 scan0066 | |
| Diagnosis of a vehicle's dynamo and lighting system failure, identifying three potential causes and concluding the dynamo itself is at fault. | 26th Aug 1913 | Box 61 \ 2 scan0067 | |
| Testing batteries with a C.A.V. Dynamo, noting voltage variations when using the horn or switching the dynamo. | 26th Aug 1913 | Box 61 \ 2 scan0068 | |
| Battery performance, comparing Edison and Exide cells for a C.A.V. Dynamo Set. | 8th Sep 1913 | Box 61 \ 2 scan0069 | |
| Letter from Bijur Motor Lighting Co. proposing their self-starting and lighting systems for use in Rolls-Royce cars. | 5th Dec 1913 | Box 61 \ 2 scan0070 | |
| Meeting with Mr. G.J. Scott to discuss fitting the Scott Self Starter to a car. | 6th Dec 1913 | Box 61 \ 2 scan0071 | |
| The mechanics of a starter, epicyclic gear, brake system, and dynamo voltage regulation. | 6th Dec 1913 | Box 61 \ 2 scan0072 | |
| Trial of a starter from Scott, chain dimensions, and sprocket details. | 19th Feb 1920 | Box 61 \ 2 scan0073 | |
| Page two of a letter from Bijur Motor Lighting Co. discussing the installation of their lighting system on a chassis. | 19th Jul 1917 | Box 61 \ 2 scan0074 | |
| Article from 'The Autocar' describing the B.R.C. Dynauto, a car lighting system with several interesting features. | 25th Apr 1914 | Box 61 \ 2 scan0075 | |
| Extract from a visit report discussing a car owner's preference for a battery-only electric lighting system. | 6th Aug 1919 | Box 61 \ 2 scan0076 | |
| Confirming the receipt of a Bijur electric self-starting and lighting outfit and its components. | 2nd Mar 1914 | Box 61 \ 2 scan0077 | |
| Comparing self-starters, dynamos, and lighting systems from the Bijur and Rushmore firms. | 20th Mar 1914 | Box 61 \ 2 scan0078 | |
| The danger of celluloid batteries and a weight comparison of Bijur and Rushmore battery sets. | 22th May 1919 | Box 61 \ 2 scan0079 | |
| Disadvantages of running a 6-volt ignition coil from an earthed lighting battery and objections from suppliers. | 26th Jun 1914 | Box 61 \ 2 scan0080 | |
| The performance of a 6-volt coil after a 10,000-mile test, with recommendations and concerns about wiring and compatibility with C.A.V. and Lucas components. | 27th Jul 1914 | Box 61 \ 2 scan0081 | |
| Note about resolving ignition and battery troubles by manufacturing their own dynamos. | 27th Jul 1914 | Box 61 \ 2 scan0082 | |
| Comparing a C.A.V. cut-out to a Lucas fitting and discussing constant current versus constant voltage electrical systems. | 27th Oct 1914 | Box 61 \ 2 scan0083 | |
| The car's electrical lighting system, voltage regulation, and a proposal for testing a new constant voltage system. | 27th Oct 1914 | Box 61 \ 2 scan0084 | |
| The suitability of various 6-volt and 12-volt electrical self-starter and dynamo systems. | 27th Oct 1914 | Box 61 \ 2 scan0085 | |
| Continuation of a report critiquing the practicality of a C.A.V. fitting and how it is secured. | 27th Oct 1914 | Box 61 \ 2 scan0086 | |
| The change to 12-volt lighting and starting sets for after-the-war chassis. | 24th Oct 1916 | Box 61 \ 2 scan0087 | |
| Requirements and issues with a dynamo for a 4.5' car engine, comparing Bijur and Lucas systems. | 22th Aug 1917 | Box 61 \ 2 scan0088 | |
| Dynamo performance, including cut-in speed, belt ratios, and comparisons with other electrical systems. | 22th Aug 1917 | Box 61 \ 2 scan0089 | |
| Comparing different car dynamo systems and outlining requirements for a new system. | 11th Nov 1918 | Box 61 \ 2 scan0090 | |
| Continued memorandum on lamp performance, lighting power, and the weight of electrical accessories. | 11th Nov 1918 | Box 61 \ 2 scan0091 | |
| New car lighting system, inquiring about dynamo output and the candle power of lamps. | 14th Nov 1918 | Box 61 \ 2 scan0092 | |
| The selection of a chassis lighting and ignition system, comparing Bijur, Lucas, and Rotax options. | 14th Nov 1918 | Box 61 \ 2 scan0093 | |
| Continuation of a discussion on battery selection, faulty C.A.V. lamps, and a 12-volt non-trembler ignition system. | 14th Nov 1918 | Box 61 \ 2 scan0094 | |
| Battery ignition system and ordering of batteries for the post-war chassis. | 14th Nov 1918 | Box 61 \ 2 scan0095 | |
| Instruction to order batteries for 12-volt car lighting and starting, and to inquire about Half Watt Lamps. | 15th Nov 1918 | Box 61 \ 2 scan0096 | |
| Request to Newton Bros. for particulars of a small dynamo for aeroplane and car applications. | 16th Nov 1918 | Box 61 \ 2 scan0097 | |
| Requesting contact with the English concessionaires for the Bijur chassis dynamo. | 16th Nov 1918 | Box 61 \ 2 scan0098 | |
| Selection of a suitable dynamo for a chassis, considering American and British options. | 16th Nov 1918 | Box 61 \ 2 scan0099 | |
| Letter to Lucas & Co. Ltd. discussing dynamo blueprints and requesting a trial and performance curves. | 16th Nov 1918 | Box 61 \ 2 scan0100 | |
| Lighting dynamo for chassis, discussing samples from Messrs. Lucas. | 18th Nov 1918 | Box 61 \ 2 scan0101 | |
| From EFC to O.O. requesting an official order be placed with Messrs. Lucas for a starter battery and a dynamo. | 18th Nov 1918 | Box 61 \ 2 scan0102 | |
| Letter discussing car lighting systems, specifically dynamo output speeds and bulb specifications. | 22th Nov 1918 | Box 61 \ 2 scan0103 | |
| Enquiry for experimental batteries for a chassis. | 25th Nov 1918 | Box 61 \ 2 scan0104 | |
| Car lighting system, dynamo output, and the ordering and testing of new half-watt lamps. | 25th Nov 1918 | Box 61 \ 2 scan0105 | |
| Use and viability of half-watt lamps for car lighting, including a reply from C.A.V. | 4th Dec 1918 | Box 61 \ 2 scan0106 | |
| Dynamo for a post-war car, attaching a letter from J. Lucas Ltd. | 5th Dec 1918 | Box 61 \ 2 scan0107 | |
| Letter from Joseph Lucas Ltd. discussing the selection of a dynamo for a post-war car. | 28th Nov 1918 | Box 61 \ 2 scan0108 | |
| Notes from a visit to Mr. Royce discussing component choices for wheels and dynamos. | 16th Dec 1918 | Box 61 \ 2 scan0109 | |
| Stock of C.A.V. lighting sets and dynamos at the Siddals Road Store. | 19th Dec 1918 | Box 61 \ 2 scan0110 | |
| Index page for documentation related to car lighting systems and dynamos. | 14th Jan 1919 | Box 61 \ 2 scan0111 | |
| Scheduling visits from representatives of various firms to discuss post-war chassis equipment. | 14th Jan 1919 | Box 61 \ 2 scan0112 | |
| Issues with the stores system for obtaining lamps required for chassis lighting. | 29th Jan 1919 | Box 61 \ 2 scan0113 | |
| Extract discussing the design and sourcing for battery ignition, lighting systems, and battery placement. | 26th Apr 1917 | Box 61 \ 2 scan0114 | |
| Responding to an inquiry about an order for bulbs, confirming a partial signature and requesting more details. | 25th Oct 1918 | Box 61 \ 2 scan0115 | |
| To Stores regarding the whereabouts of half watt lamps. | 13th Feb 1919 | Box 61 \ 2 scan0116 | |
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