| Description | Date | Identifier | |
| Specification detailing the inspection and tests for a small shunt dynamo. | 2nd Oct 1934 | Box 62 \ 3 scan0454 | |
| Instructions for inspecting and testing a dynamo, covering springs, insulation, and brush bedding. | 2nd Oct 1934 | Box 62 \ 3 scan0455 | |
| Instructions for the final bedding and testing of dynamo brushes. | 2nd Oct 1934 | Box 62 \ 3 scan0456 | |
| Test procedures for a dynamo, covering performance under load, vibration, and insulation integrity. | 26th Oct 1934 | Box 62 \ 3 scan0457 | |
| Proposal to standardise a smaller dynamo on the Bentley chassis, detailing performance comparisons and recommendations. | 26th Oct 1934 | Box 62 \ 3 scan0458 | |
| Work order detailing the new parts required to produce a ventilated dynamo for the 20/25 HP Chassis, scheme 755. | 30th Oct 1934 | Box 62 \ 3 scan0459 | |
| Parts list modification for the Magneto Drive and Fittings on a 20/25 HP Chassis. | 1st Nov 1934 | Box 62 \ 3 scan0460 | |
| Requesting an investigation into crankcase modifications for running a small dynamo on a Bentley at increased speed. | 12th Nov 1934 | Box 62 \ 3 scan0461 | |
| Bentley dynamo to battery charge issues due to customer complaints of discharged batteries. | 26th Nov 1934 | Box 62 \ 3 scan0462 | |
| Examination of the Bentley dynamo and battery charging system in response to customer complaints about discharged batteries. | 26th Nov 1934 | Box 62 \ 3 scan0463 | |
| Page 2 of a report detailing the conclusions and test procedures for a dynamo-battery circuit. | 26th Nov 1914 | Box 62 \ 3 scan0464 | |
| Analysis of volt drop in the dynamo and battery system, with recommendations for improvement. | 26th Nov 1934 | Box 62 \ 3 scan0465 | |
| Continued memorandum regarding improvements to dynamos and regulators for battery charging, particularly for cars fitted with radio sets. | 26th Nov 1934 | Box 62 \ 3 scan0466 | |
| Urgent internal memo regarding the 20/25 HP Dynamo Output. | 4th Dec 1934 | Box 62 \ 3 scan0467 | |
| Epidemic of complaints regarding insufficient battery charging on 20/25 HP models due to low-speed town driving. | 3rd Dec 1934 | Box 62 \ 3 scan0468 | |
| Solutions for improving the dynamo output on a 20/25HP model. | 5th Dec 1934 | Box 62 \ 3 scan0469 | |
| Tests for a 20/25 dynamo with a fan for air cooling, noting sufficient cooling but excessive noise. | 12th Dec 1934 | Box 62 \ 3 scan0470 | |
| Preliminary test report on a 20/25HP dynamo arranged for air cooling, detailing performance and noise issues. | 12th Dec 1934 | Box 62 \ 3 scan0471 | |
| The urgent dispatch of a 20/25 HP Chassis Dynamo Armature to France. | 12th Dec 1934 | Box 62 \ 3 scan0472 | |
| Urgent request to build a special Bentley dynamo for customers who 'potter about' London, requiring a modified set of poles. | 12th Dec 1934 | Box 62 \ 3 scan0473 | |
| Suggesting the modification of a Dynamo D.72906 armature for a Special Bentley Dynamo. | 13th Dec 1934 | Box 62 \ 3 scan0474 | |
| New controller for the dynamo output on a Bentley chassis. | 15th Dec 1934 | Box 62 \ 3 scan0475 | |
| Dynamo performance on Bentley cars, particularly the issue of late cutting in speed and potential solutions. | 18th Dec 1934 | Box 62 \ 3 scan0476 | |
| Listing the blueprints required for a special Bentley dynamo with a ventilated end cover. | 18th Dec 1934 | Box 62 \ 3 scan0477 | |
| The supply of one standard 20/25 shunt dynamo. | 17th Dec 1934 | Box 62 \ 3 scan0478 | |
| Internal request to the Order Office to purchase two No.3 Ideal Rotary Counters for the Experimental Department. | 15th Feb 1916 | Box 63 \ 1 scan0001 | |
| Letter from C. Lindley & Co. Ltd. regarding a quote for a 5-figure Ideal Rotary Counter. | 12th Feb 1917 | Box 63 \ 1 scan0002 | |
| Enquiry to Messrs C. Lindley & Co. Ltd. about the supply of a Harding 'Ideal' Improved Counter. | 7th Feb 1917 | Box 63 \ 1 scan0003 | |
| Request with a dimensional sketch to make a footstool for the Experimental Department Drawing Office. | 27th Mar 1917 | Box 63 \ 1 scan0004 | |
| Request to order two dual-needle stopwatches (chronographs) for the Experimental Department. | 4th May 1917 | Box 63 \ 1 scan0005 | |
| Cancelling an order for a Metre Scale for experimental purposes. | 3rd Jul 1917 | Box 63 \ 1 scan0006 | |
| The purchase of a barometer for the Experiment Department. | 18th Sep 1917 | Box 63 \ 1 scan0007 | |
| Request to order four aluminium cased Aviation Barographs following confirmation of suitable sample sheets. | 5th Nov 1917 | Box 63 \ 1 scan0008 | |
| Request to order a 'double elephant size' Vertical Catena Drawing Table for the Experimental Department's Drawing Office. | 20th Sep 1918 | Box 63 \ 1 scan0009 | |
| Order for two small cans of Anti Sulphuric enamel for the Experimental Department. | 1st Jan 1919 | Box 63 \ 1 scan0010 | |
| Internal request to order materials including washers, wire, and saw blades for the Experimental Department's Electrical Section. | 17th Feb 1919 | Box 63 \ 1 scan0011 | |
| The inability to source a new typewriter and a request for Mr. Hives to return one intended for Mr. Clarke. | 22th May 1919 | Box 63 \ 1 scan0012 | |
| Requesting a typewriter and a telephone for the Experimental Department Drawing Office. | 23th May 1919 | Box 63 \ 1 scan0013 | |
| The urgent necessity of a telephone for communication with Mr. Day and Mr. Barrington. | 23th May 1919 | Box 63 \ 1 scan0014 | |
| Request to order a spring balance for the use of the Experimental Department's Electrical Section. | 27th May 1919 | Box 63 \ 1 scan0015 | |
| Requesting the return of a dropped chronograph to its makers for repair. | 23th Jul 1919 | Box 63 \ 1 scan0016 | |
| Requesting the installation of a gas supply for the experimental shed. | 6th Aug 1919 | Box 63 \ 1 scan0017 | |
| Requesting a telephone and a second typewriter to prevent delays in completing tests on vehicle equipment. | 6th Aug 1919 | Box 63 \ 1 scan0018 | |
| Order for 2 spare diaphragms for standard Klaxon horns. | 17th Aug 1919 | Box 63 \ 1 scan0019 | |
| Instruction note regarding the receipt of unsuitable 10 inch saw blades intended only for cutting brass. | 3rd Oct 1919 | Box 63 \ 1 scan0020 | |
| Request to order three dozen 1/4' brass washers from Messrs. Wallis, Derby. | 1st Dec 1919 | Box 63 \ 1 scan0021 | |
| Request with sketches for the construction of a foot stool. | 12th Mar 1920 | Box 63 \ 1 scan0022 | |
| The order of a Starett Indicator for an 'Eagle' cylinder test. | 24th Mar 1920 | Box 63 \ 1 scan0023 | |
| Request to obtain two motor cycle driving belts and two fasteners for a dynamo bench test. | 20th Apr 1920 | Box 63 \ 1 scan0024 | |
| Order for 1 lb. of copper washers for the Experimental Department. | 4th Aug 1920 | Box 63 \ 1 scan0025 | |
| Request for a leather apron for an assistant working with acid batteries. | 8th Sep 1920 | Box 63 \ 1 scan0026 | |
| Requesting the order of two 0-100° Centigrade thermometers for the Electrical Experimental Department. | 9th Sep 1920 | Box 63 \ 1 scan0027 | |
| The order of two large glass funnels for filling batteries. | 27th Nov 1920 | Box 63 \ 1 scan0028 | |
| Order for one pint of black anti-sulphuric enamel for a battery vibration rig. | 10th Sep 1921 | Box 63 \ 1 scan0029 | |
| Confirming stock availability of anti-sulphuria black enamel and instructing to apply to the Stores. | 12th May 1921 | Box 63 \ 1 scan0030 | |
| Enquiry to source various sizes of sistoflex insulating tubing. | 14th Mar 1922 | Box 63 \ 1 scan0031 | |
| Sales letter from Spicer Brothers Ltd promoting 'Sistoflex' insulating flexible tubes and other electrical insulating materials. | 23th Jan 1922 | Box 63 \ 1 scan0032 | |
| Internal request to order various bores of yellow Sistoflex tubing for the Experimental Department. | 11th Sep 1922 | Box 63 \ 1 scan0033 | |
| Small order request for a Renold bush roller chain for an experimental magneto drive. | 15th Jun 1921 | Box 63 \ 1 scan0034 | |
| Small order request for two Centigrade thermometers and copper washers for the Experimental Electrical Laboratory. | 20th Jun 1921 | Box 63 \ 1 scan0035 | |
| The availability of copper washers and requesting them for the Experimental Department. | 22th Jun 1921 | Box 63 \ 1 scan0036 | |
| Request to order two Centigrade thermometers reading up to 120°C for the Experimental Department. | 17th Sep 1923 | Box 63 \ 1 scan0037 | |
| Internal request to order two centigrade thermometers for the Electrical Experimental Department. | 19th Oct 1923 | Box 63 \ 1 scan0038 | |
| EFC to Mr. Peskett requesting the purchase of workshop flex. | 18th Oct 1923 | Box 63 \ 1 scan0039 | |
| Faulty Benson stopwatch being sent for repair. | 22th Oct 1923 | Box 63 \ 1 scan0040 | |
| Request for an order to purchase various items for the Electrical Experimental Laboratory. | 23th Jan 1924 | Box 63 \ 1 scan0041 | |
| Confirming the dispatch of two bottles of glycerine solutions to the laboratory. | 27th Jun 1924 | Box 63 \ 1 scan0042 | |
| Inquiry about sourcing thermometers suitable for taking the temperature of battery electrolyte. | 27th Jun 1924 | Box 63 \ 1 scan0043 | |
| Letter from Peto & Radford responding to an inquiry about thermometers and providing a catalogue price. | 1st Jul 1924 | Box 63 \ 1 scan0044 | |
| Procurement of a special thermometer for measuring battery electrolyte temperature. | 2nd Jul 1924 | Box 63 \ 1 scan0045 | |
| Order for four cell testing thermometers from Messrs. Peto & Radford. | 4th Jul 1924 | Box 63 \ 1 scan0046 | |
| Request to order two thermometers for the Experimental Department. | 9th Jul 1924 | Box 63 \ 1 scan0047 | |
| Misunderstanding over an order for specialized battery thermometers. | 12th Jul 1924 | Box 63 \ 1 scan0048 | |
| Order for an enamelled steel beaker for the Experimental Department. | 12th Jul 1924 | Box 63 \ 1 scan0049 | |
| The size of battery thermometers supplied by Peto & Radford and a request for feedback before responding. | 28th Jul 1924 | Box 63 \ 1 scan0050 | |
| Clarifying a misunderstanding regarding battery thermometers, specifically the shape of their reservoirs. | 12th Aug 1924 | Box 63 \ 1 scan0051 | |
| Distribution and testing of battery thermometers. | 21th Aug 1924 | Box 63 \ 1 scan0052 | |
| Misunderstanding over the required type of battery thermometers. | 22th Aug 1924 | Box 63 \ 1 scan0053 | |
| Misunderstanding with supplier Peto & Radford over the design of supplied battery thermometers. | 8th Sep 1924 | Box 63 \ 1 scan0054 | |
| The sourcing of a more suitable battery thermometer. | 9th Sep 1924 | Box 63 \ 1 scan0055 | |
| Sample battery thermometer for vehicle battery testing. | 15th Sep 1924 | Box 63 \ 1 scan0056 | |
| Internal instruction memo comparing a new Chloride Battery Thermometer to a previous model from another supplier. | 15th Sep 1924 | Box 63 \ 1 scan0057 | |
| Instructions detailing the specifications for a mercury thermometer, including its range, accuracy, and packaging. | 5th Dec 1922 | Box 63 \ 1 scan0058 | |
| Suitability of a sample battery thermometer and requesting a new one for the Test Department. | 15th Sep 1924 | Box 63 \ 1 scan0059 | |
| Request to order a spring balance from Salters with a circular scale. | 29th Oct 1924 | Box 63 \ 1 scan0060 | |
| EFC to Wd. requesting an order for electrician's staples for the Experimental Department. | 18th Nov 1924 | Box 63 \ 1 scan0061 | |
| Request to order two centigrade thermometers reading up to 120°C for the Experimental Department. | 21th Apr 1925 | Box 63 \ 1 scan0062 | |
| Requesting a piece of ebonite for High Tension (H.T.) ignition experiments. | 22th May 1925 | Box 63 \ 1 scan0063 | |
| The order of three cylindrical metal Lucas lamp bulb cases for experimental cars. | 25th May 1925 | Box 63 \ 1 scan0064 | |
| Internal request to order two glass boxes from G.E.C. for use in battery tests. | 28th Aug 1925 | Box 63 \ 1 scan0065 | |
| Request for a piece of ebonite for a terminal board for testing transformers. | 11th Sep 1925 | Box 63 \ 1 scan0066 | |
| Receipt of four glass boxes from Messrs. Ackroyd & Best Ltd. when only two were ordered. | 22th Sep 1925 | Box 63 \ 1 scan0067 | |
| The purchase of brass battery terminal nuts from The Exide Co. for experimental purposes. | 16th Oct 1925 | Box 63 \ 1 scan0068 | |
| Order for Sistoflex tubing for an experimental transformer. | 21th Oct 1925 | Box 63 \ 1 scan0069 | |
| Request to order Sistoflex flexible tubing for an experimental transformer. | 27th Oct 1925 | Box 63 \ 1 scan0070 | |
| Communication regarding the despatch of Sistoflex Tubing from Spicers Ltd. | 10th Nov 1925 | Box 63 \ 1 scan0071 | |
| Catalogue for a specific Harding Revolution Counter. | 16th Nov 1925 | Box 63 \ 1 scan0072 | |
| Specifying requirements for a custom Harding Revolution Counter with a hand-operated clutch. | 23th Nov 1925 | Box 63 \ 1 scan0073 | |
| Inquiry about sourcing a Harding Revolution Counter with a hand-operated clutch. | 4th Jan 1926 | Box 63 \ 1 scan0074 | |
| Enquiry about a Harding Revolution Counter and the potential need to add an external clutch. | 8th Jan 1925 | Box 63 \ 1 scan0075 | |
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