| Description | Date | Identifier | |
| Cost estimate and production details for standardising a feature on three chassis types. | 22th Jan 1937 | Box 168a \ 3 img338 | |
| Request to overhaul and repair a Phantom III Dynamo L.V.X. for car installation after bench tests. | 22th Jan 1937 | Box 168a \ 3 img339 | |
| Requesting the repair of a damaged Bentley Dynamo S.F.1. | 22th Jan 1937 | Box 168a \ 3 img340 | |
| Requesting the overhaul and repair of a Phantom III Dynamo T.C. following a bench endurance test. | 22th Jan 1937 | Box 168a \ 3 img341 | |
| Requesting arrangements to test a non-standard Delco dynamo that does not fit the standard rig. | 26th Jan 1937 | Box 168a \ 3 img342 | |
| The specifications and requesting a check on the Experimental Dynamo I.C.2. | 29th Jan 1937 | Box 168a \ 3 img343 | |
| Urgent memorandum regarding the overhauling of dynamos for chassis 34 Ex. | 3rd Feb 1937 | Box 168a \ 3 img344 | |
| Letter from Hadfields recommending a specific insulating varnish for the impregnation of electrical windings. | 10th Feb 1937 | Box 168a \ 3 img345 | |
| Confirming a meeting arrangement with Mr. Wagner regarding a Phantom III at Conduit Street. | 22th Feb 1937 | Box 168a \ 3 img346 | |
| Enquiry to British Thomson Houston Co. Ltd. regarding a generator for cinema flood-lighting. | 27th Feb 1937 | Box 168a \ 3 img347 | |
| Clarifying a point about the Phantom III charging system's armature fuse for the instruction book. | 27th Feb 1937 | Box 168a \ 3 img348 | |
| Requesting an alteration to a dynamo's field winding for bench tests with a new Lucas regulator. | 1st Mar 1937 | Box 168a \ 3 img349 | |
| Letter from The British Thomson-Houston Company Ltd declining an enquiry for a generator, citing high workload. | 1st Mar 1937 | Box 168a \ 3 img350 | |
| Inquiry to Newton Bros about supplying a small A.C. or D.C. generator for flood-lighting work for cinema photography. | 2nd Mar 1937 | Box 168a \ 3 img351 | |
| Letter from Newton Brothers (Derby) Ltd. responding to an inquiry for a small generator, quoting a 25-30 week delivery time. | 3rd Mar 1937 | Box 168a \ 3 img352 | |
| The difficulty in sourcing a suitable generator for a customer's car. | 4th Mar 1937 | Box 168a \ 3 img353 | |
| Request to order spare test tackle for 500-watt generators. | 9th Mar 1937 | Box 168a \ 3 img354 | |
| With sketch detailing dynamo charging failures on a 4 1/4-litre Bentley due to a shorting ignition lamp cable. | 9th Mar 1937 | Box 168a \ 3 img355 | |
| The overhaul of a regulator, two dynamos, and a starter motor. | 10th Mar 1937 | Box 168a \ 3 img356 | |
| Query from R. H. Wagner regarding the fitting of a generator to chassis No.3-BT-175. | 17th Mar 1937 | Box 168a \ 3 img357 | |
| Customer's request for a generator on chassis 3.BT.175 and a proposed solution. | 18th Mar 1937 | Box 168a \ 3 img358 | |
| Historical and recent oil leakage issues with the Bentley tachometer drive on dynamos. | 18th Mar 1937 | Box 168a \ 3 img359 | |
| Dynamo issues on Bentley chassis, including oil on commutators and sticky brushes. | 18th Mar 1937 | Box 168a \ 3 img360 | |
| Investigation into oil entering the dynamo from the Bentley tachometer drive and the unauthorized fitting of a breather device. | 16th Mar 1937 | Box 168a \ 3 img361 | |
| Testing irregularities and an oil leak issue concerning the Bentley tachometer drive. | 19th Mar 1937 | Box 168a \ 3 img362 | |
| Delay with the Order Office regarding the overhaul and repair of an A.M. Type Generator. | 23th Mar 1937 | Box 168a \ 3 img363 | |
| Letter from J. Stone & Co. Ltd. regarding the receipt of a generator for overhaul, awaiting instructions before proceeding. | 15th Mar 1937 | Box 168a \ 3 img364 | |
| Complaints of oil on the commutator of Bentley dynamos and suggesting a drain pipe as a solution. | 5th Apr 1937 | Box 168a \ 3 img365 | |
| Notice regarding blueprints for a Dynamo on the Wraith III, detailing a modification to the dowel position on the new Magnet Case. | 6th Apr 1937 | Box 168a \ 3 img366 | |
| Requesting an examination of a dynamo commutator and its brushes. | 9th Apr 1937 | Box 168a \ 3 img367 | |
| Instruction to change the dynamo on the Phantom III engine on test bed No.5 for a standard machine. | 17th Apr 1937 | Box 168a \ 3 img368 | |
| Request for the production of modified Bentley and Wraith dynamos for testing. | 20th Apr 1937 | Box 168a \ 3 img369 | |
| Suggesting modifications to the Dynamo Drive's eccentric sleeve lockwasher and locating dowel arrangement. | 21th Apr 1937 | Box 168a \ 3 img370 | |
| Blueprint diagram illustrating an existing scheme for a dynamo drive assembly. | 21th Apr 1938 | Box 168a \ 3 img371 | |
| Suggested scheme for a double lockwasher assembly, deleting the hand-drilling operation and locating dowel. | 21th Apr 1938 | Box 168a \ 3 img372 | |
| Instruction to alter a dynamo back to standard for Engine Unit C.17. | 22th Apr 1937 | Box 168a \ 3 img373 | |
| Request for three modified P.3 dynamos for testing due to commutating troubles on customer chassis. | 23th Apr 1937 | Box 168a \ 3 img374 | |
| Prints for the Wraith III Chassis dynamo suspension, section 8110. | 28th Apr 1937 | Box 168a \ 3 img375 | |
| List of parts and drawings for the Wraith III Dynamo, scheme 1072. | 28th Apr 1937 | Box 168a \ 3 img376 | |
| Letter from Rotax regarding drawings for a 24 volt 1000 watt generator. | 28th Apr 1927 | Box 168a \ 3 img377 | |
| Blueprint of an Armature Shaft. | 20th Apr 1937 | Box 168a \ 3 img378 | |
| Blueprint of a dynamo component showing dimensions and alterations. | 20th Apr 1937 | Box 168a \ 3 img379 | |
| Instruction to clean and overhaul a Phantom III dynamo for testing in France. | 29th Apr 1937 | Box 168a \ 3 img380 | |
| Instruction to arrange an experimental test on a 25/30-HP dynamo, replacing a ball bearing with a plain bearing to fix a noise issue. | 3rd May 1937 | Box 168a \ 3 img381 | |
| Modifications to the Dynamo Drive lockplate for the Phantom III. | 3rd May 1937 | Box 168a \ 3 img382 | |
| Request to overhaul and clean two dynamos preparatory to fitting to cars. | 3rd May 1937 | Box 168a \ 3 img383 | |
| Request to send a complete set of standard Bentley dynamo brushes to France for fitting. | 11th May 1937 | Box 168a \ 3 img384 | |
| Sending replacement dynamo brushes to France for testing. | 13th May 1937 | Box 168a \ 3 img385 | |
| Request to order 6 condensers from the Philco Radio Co. for suppressing interference noises from chassis dynamos. | 19th May 1937 | Box 168a \ 3 img386 | |
| Production delay pending a new testing specification for 25/30-HP & Bentley Governors. | 19th May 1937 | Box 168a \ 3 img387 | |
| Request for an adaptor to be made to drawing EL.420 to drive a Bosch starter as a generator. | 20th May 1937 | Box 168a \ 3 img388 | |
| Blueprint for a Bosch starter pulley adaptor. | 10th May 1927 | Box 168a \ 3 img389 | |
| Blueprint drawing of a small mechanical component with dimensions. | 20th May 1937 | Box 168a \ 3 img390 | |
| Problems with the rubber coupled dynamo drive on Bentley and Phantom models. | 2nd May 1931 | Box 168a \ 3 img391 | |
| Troubles with the rubber coupled Wraith Dynamo Drive and the lack of a satisfactory solution. | 22th May 1937 | Box 168a \ 3 img392 | |
| Requesting an overhaul for a Bentley dynamo to be used in a 15,000-mile test. | 28th May 1937 | Box 168a \ 3 img393 | |
| Request to fit a Cheapened Wraith Dynamo No.1SPhantom II to chassis 26-G-VI for road tests. | 26th May 1937 | Box 168a \ 3 img394 | |
| Burning of dynamo field resistance and the proposed new blueprints with a larger resistance and fuse. | 1st Jun 1937 | Box 168a \ 3 img395 | |
| Lab tests to investigate the complaint of oil entering Bentley dynamos from the tachometer drive. | 4th Jun 1937 | Box 168a \ 3 img396 | |
| Dynamo breather and lubrication issues, recommending the fitting of Gits oil seals. | 4th Jun 1937 | Box 168a \ 3 img397 | |
| Issue of oil entering Bentley dynamos from the tachometer drive and the potential sources of the problem. | 9th Jun 1937 | Box 168a \ 3 img398 | |
| Complaints related to over-oiling and stiff grease in tachometer tubes. | 9th Jun 1937 | Box 168a \ 3 img399 | |
| Oil entering Bentley dynamos from the tachometer drive and the need for a decision on a vent. | 10th Jun 1937 | Box 168a \ 3 img400 | |
| Troubleshooting an oil issue on the dynamos of a chassis. | 12th Jun 1937 | Box 168a \ 3 img401 | |
| Memo discussing troubles with returned spare parts, listing specific components and observed faults. | 10th Jun 1937 | Box 168a \ 3 img402 | |
| The failure of two Bentley dynamos being returned to the works. | 17th Jun 1937 | Box 168a \ 3 img403 | |
| Oil entering Bentley Dynamos from the Tachometer Drive and the effectiveness of a recent fix. | 18th Jun 1937 | Box 168a \ 3 img404 | |
| Complaint of erratic charging from a Bentley P.6.RR dynamo on chassis 122 JD. | 24th Jun 1937 | Box 168a \ 3 img405 | |
| Investigation report into a faulty Bentley Dynamo W.S.BK, detailing issues with erratic charging and an oil leak. | 24th Jun 1937 | Box 168a \ 3 img406 | |
| Photographic report on a wrongly drilled production moulding for a tachometer drive. | 24th Jun 1937 | Box 168a \ 3 img407 | |
| Letter to Messrs Rotax Ltd. requesting clarification on conflicting generator blueprints and proposing a modification. | 28th Apr 1937 | Box 168a \ 3 img408 | |
| New dynamo received from the Works which was found to be saturated in oil and is being returned. | 28th Jun 1937 | Box 168a \ 3 img409 | |
| Oil leaks and coupling issues with the Bentley Dynamo W-3-HK and proposed solutions. | 30th Jun 1937 | Box 168a \ 3 img410 | |
| Instruction to drain oil from the gearbox of all Bentley Dynamos before despatch. | 30th Jun 1937 | Box 168a \ 3 img411 | |
| Cover letter for a blueprint detailing modifications to the Wraith III Dynamo. | 5th Jul 1937 | Box 168a \ 3 img412 | |
| Modifications to the Wraith III Dynamo to suit the LR.7 Regulator. | 7th Jul 1937 | Box 168a \ 3 img413 | |
| Requesting the cleaning and overhaul of a dynamo after an endurance test. | 10th Jul 1937 | Box 168a \ 3 img414 | |
| Noisy dynamo in a Wraith vehicle requiring a new roller bearing. | 27th Jul 1937 | Box 168a \ 3 img415 | |
| Noisy dynamo on a Wraith model, finding a dry roller bearing and requesting a replacement. | 27th Jul 1937 | Box 168a \ 3 img416 | |
| Request to forward a Hoffmann Roller Race to France for fitment to a Wraith III chassis undergoing testing. | 28th Jul 1937 | Box 168a \ 3 img417 | |
| Request for a replacement 'Hoffmann' roller bearing for a faulty dynamo front bearing on a Wraith Chassis. | 28th Jul 1937 | Box 168a \ 3 img418 | |
| Noisy new roller bearing for a dynamo on a 25/30 HP model, suggesting potential solutions. | 22th Aug 1937 | Box 168a \ 3 img419 | |
| Follow-up memo requesting a governor be made for LOP.EW.1285. | 23th Aug 1937 | Box 168a \ 3 img420 | |
| Experimental detailing of a modification to the lubrication of a Bentley tachometer drive and dynage bearing. | 25th Aug 1937 | Box 168a \ 3 img421 | |
| Defective dynamo fuse from a Bentley B.130.JD, attributing the fault to bad workmanship. | 1st Sep 1937 | Box 168a \ 3 img422 | |
| Request to replace a mock-up dynamo front bearing bracket with the correct type (DB.250). | 3rd Sep 1931 | Box 168a \ 3 img423 | |
| Request to obtain a 1/4 lb. reel of No.26 S.W.G. 'Ferry' wire with an oxide coating. | 7th Jul 1937 | Box 168a \ 3 img424 | |
| Bench test results for a Lucas dynamo compared to an R.R. model for the 25/30 or Bentley car. | 1st Sep 1937 | Box 168a \ 3 img425 | |
| The low-speed heating, output performance, and commutation tests comparing two different electrical machines. | 7th Sep 1937 | Box 168a \ 3 img426 | |
| Comparative endurance test report on machine performance, focusing on brush and commutator wear. | 7th Mar 1937 | Box 168a \ 3 img427 | |
| On the overhaul and testing of a Lucas machine with an odd-number slot armature. | 7th Sep 1937 | Box 168a \ 3 img428 | |
| Requesting the preparation of a Lucas Dynamo for a road test following a 300-hour endurance run. | 8th Sep 1937 | Box 168a \ 3 img429 | |
| The performance of a Lucas dynamo under test for 25/30 and Bentley cars. | 17th Sep 1937 | Box 168a \ 3 img430 | |
| Letter from The Morgan Crucible Company Limited regarding faulty starter control contacts and their replacement. | 14th Sep 1927 | Box 168a \ 3 img431 | |
| The parts list for separating the Bentley Tachometer Drive from the Dynamo to prevent oil leakage. | 26th Sep 1937 | Box 168a \ 3 img432 | |
| List of new and obsolete parts for a dynamo and tachometer drive assembly. | 28th Sep 1937 | Box 168a \ 3 img433 | |
| Analysis of dynamo sparking and brush sticking issues, with a proposed new experimental armature design. | 30th Sep 1937 | Box 168a \ 3 img434 | |
| Conclusions from tests on brush gear, outlining specifications for its components and comparing standard vs experimental machines. | 30th Jan 1937 | Box 168a \ 3 img435 | |
| Bench and road test report comparing a standard machine against an experimental machine. | 30th Sep 1937 | Box 168a \ 3 img436 | |
| Requesting the overhaul of dynamo No.C.C.1 for car 39-EX, prior to testing in France. | 5th Oct 1937 | Box 168a \ 3 img437 | |
| | | | |
