Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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Letter from S. Smith & Sons proposing various thermostat arrangements and referencing specific drawings.16th Sep 1937Box 156 \ 1  scan0256
Visit to Vauxhall Motors Ltd. to discuss the reliability of thermostats supplied by the British Thermostat Co. Ltd.17th Sep 1937Box 156 \ 1  scan0257
Vauxhall's thermostat testing methods and cooling system performance.17th Sep 1937Box 156 \ 1  scan0258
Summary of observations on competitor pump glands and thermostat units, with recommendations for development.17th Sep 1937Box 156 \ 1  scan0259
Diagram showing a modification to the thermostat top plate assembly to prevent leakage.17th Sep 1937Box 156 \ 1  scan0260
Letter to a supplier regarding failures of experimental thermostats and requesting design modifications on future orders.18th Sep 1937Box 156 \ 1  scan0261
Letter to S. Smith & Sons Ltd. regarding the standardisation of a thermostat unit.20th Sep 1937Box 156 \ 1  scan0262
Tests at Brooklands on a 6.B.1V car fitted with a Marston dummy shutter and thermostat for the M. series Bentley.20th Sep 1937Box 156 \ 1  scan0263
Results of a test on the 6.B.1V cooling system on the road and at Brooklands Track.20th Sep 1937Box 156 \ 1  scan0264
Summary report on the cooling system being standardised for the Bentley M. series.20th Sep 1937Box 156 \ 1  scan0265
Letter from The British Thermostat Co. Ltd. regarding an incorrect drawing and the dispatch of two valve stem top plate assemblies for examination.21th Sep 1937Box 156 \ 1  scan0266
Letter from S. Smith & Sons to C.S. Steadman arranging a meeting to discuss two separate matters.21th Sep 1937Box 156 \ 1  scan0267
Letter to S. Smith & Sons Ltd. arranging a meeting to discuss matters from a previous letter.24th Sep 1937Box 156 \ 1  scan0268
Letter from S. Smith & Sons confirming a meeting with Mr. C.S. Steadman.27th Sep 1937Box 156 \ 1  scan0269
Letter to The British Thermostat Co. Ltd. clarifying a dimension on a thermostat drawing.28th Sep 1937Box 156 \ 1  scan0270
Letter from The British Thermostat Co. Ltd. confirming a dimension on Drawing No. EB.3410 is correct.30th Sep 1937Box 156 \ 1  scan0271
Letter to Vauxhall Motors requesting information on their water pump gland design and experience with 'No-Co-Ro' corrosion inhibitor.30th Sep 1937Box 156 \ 1  scan0272
Letter from S. Smith & Sons regarding the testing of a drop-in type thermostat sent on a loan account.1st Oct 1937Box 156 \ 1  scan0273
Letter to a supplier regarding the failure of a thermostat during testing.5th Oct 1937Box 156 \ 1  scan0274
Page 2 of a letter regarding the return of defective parts.5th Oct 1937Box 156 \ 1  scan0275
Return of a failed thermostat to the British Thermostat Co. Ltd.5th Oct 1937Box 156 \ 1  scan0276
Letter to The British Thermostat Co. Ltd. requesting the repair and supply of two thermostats with specific operating temperatures.6th Oct 1937Box 156 \ 1  scan0277
Letter from The British Thermostat Co. Ltd. concerning a faulty thermostat where the valve head became loose due to a melted soldered joint.7th Oct 1937Box 156 \ 1  scan0278
Letter from The British Thermostat Co. Ltd. discussing a ball valve failure and thermostat testing.9th Oct 1937Box 156 \ 1  scan0279
Development of an improved and cheaper thermostat system for the B.III model.9th Oct 1937Box 156 \ 1  scan0280
Letter to The British Thermostat Co. Ltd. discussing soldering methods for a valve head.9th Oct 1937Box 156 \ 1  scan0281
Letter discussing experimental methods for thermostats, including soldering techniques and pressure testing.11th Oct 1937Box 156 \ 1  scan0282
Letter from S. Smith & Sons regarding Advice Notes for a P.V. type Thermostat.11th Oct 1937Box 156 \ 1  scan0283
Letter from The British Thermostat Co., Ltd. concerning the assembly and testing of a thermostat valve head.11th Oct 1937Box 156 \ 1  scan0284
Letter from The British Thermostat Co. Ltd. regarding a bellows unit pressure test.13th Oct 1937Box 156 \ 1  scan0285
Letter from The British Thermostat Co. Ltd. reporting on a thermostat pressure test.13th Oct 1937Box 156 \ 1  scan0286
Thermostat from S. Smith & Sons, Ltd. left for testing purposes on a loan account.14th Oct 1937Box 156 \ 1  scan0287
Instructing modifications to the cooling system of car 1.B.IV due to issues with the thermostat scheme.14th Oct 1937Box 156 \ 1  scan0288
The dispatch of a thermostat to central stores and its subsequent return.16th Oct 1937Box 156 \ 1  scan0289
Letter to The British Thermostat Co. Ltd. regarding a thermostat bellows failure and proposed solutions.16th Oct 1937Box 156 \ 1  scan0290
Following up on an outstanding invoice for Thermostat Assemblies and requesting payment authorization.16th Oct 1937Box 156 \ 1  scan0291
Letter from The British Thermostat Co., Ltd. confirming a meeting with Mr. Steadman.18th Oct 1937Box 156 \ 1  scan0292
Letter from Harrison Radiator Division regarding an outstanding invoice for thermostat assemblies.18th Oct 1937Box 156 \ 1  scan0293
Letter to The British Thermostat Co. Ltd. requesting modifications to two thermostats.20th Oct 1937Box 156 \ 1  scan0294
Letter from The British Thermostat Co. Ltd. regarding the modification, testing, and supply of two thermostat assemblies.21th Oct 1937Box 156 \ 1  scan0295
Letter from The British Thermostat Co. regarding the pressure testing and distortion of Vauxhall pattern thermostats.25th Oct 1937Box 156 \ 1  scan0296
Letter to The British Thermostat Co. Ltd. requesting a pressure test and investigation into thermostat design improvements.26th Oct 1937Box 156 \ 1  scan0297
Recalling a standardisation sheet for a Bentley radiator thermostat scheme due to failures and issuing a revised design.26th Oct 1937Box 156 \ 1  scan0298
Dispatch of two thermostats for examination and their subsequent return.27th Oct 1937Box 156 \ 1  scan0299
Letter to The British Thermostat Co. Ltd. discussing the testing of two thermostats and requesting modified units.27th Oct 1937Box 156 \ 1  scan0300
Letter requesting modified Vauxhall units with specific technical requirements.27th Oct 1937Box 156 \ 1  scan0301
Revised thermostat scheme for a Bentley radiator with dummy shutters.27th Oct 1937Box 156 \ 1  scan0302
Letter from The British Thermostat Co. Ltd. regarding the testing and supply of thermostat components.27th Oct 1937Box 156 \ 1  scan0303
Letter from The British Thermostat Co., Ltd. regarding thermostat testing, design modifications, and pricing.28th Oct 1937Box 156 \ 1  scan0304
Page 2 of a letter from The British Thermostat Co. Ltd. regarding thermostats and modifications.30th Oct 1937Box 156 \ 1  scan0305
Letter from The British Thermostat Co. asking for clarification on which Smith's unit part is being used for experiments on the Bentley.30th Oct 1937Box 156 \ 1  scan0306
List of parts and modifications for the Bentley 11 thermostat system and thermometer bottle.30th Oct 1937Box 156 \ 1  scan0307
Potential standardisation of the Bentley fixed shutter radiator.1st Nov 1937Box 156 \ 1  scan0308
Brief summary of four different thermostat schemes tested, detailing their advantages and disadvantages.1st Nov 1937Box 156 \ 1  scan0309
Summary comparing three different cost-saving schemes involving thermostat units and water pressure.2nd Nov 1937Box 156 \ 1  scan0310
Letter to The British Thermostat Co. Ltd. regarding the postponement of a thermostatic bypass system due to unsatisfactory running experience.2nd Nov 1937Box 156 \ 1  scan0311
Correspondence regarding a drop-in thermostat unit, requesting drawings and a list of supplied units.2nd Nov 1937Box 156 \ 1  scan0312
Invoice for a thermostat and a request for payment instructions.2nd Nov 1937Box 156 \ 1  scan0313
Letter concerning the postponement of thermostat standardisation and enclosing a new drawing for an interchangeable unit.3rd Nov 1937Box 156 \ 1  scan0314
Advice note detailing the cost of thermostats related to drawing BGA.2073.4th Nov 1937Box 156 \ 1  scan0315
Letter to The British Thermostat Co. Ltd. requesting a quotation for small diameter bellows.4th Nov 1937Box 156 \ 1  scan0316
Order for three thermostats from The British Thermostat Co. Ltd.4th Nov 1937Box 156 \ 1  scan0317
Letter requesting a price estimate for a 'drop in' type thermostat from The British Thermostat Co. Ltd.11th Nov 1937Box 156 \ 1  scan0318
Letter to S.Smith & Sons Ltd. regarding a 'Drop In' type thermostat, requesting its opening temperature and a quotation for 200 units.11th Nov 1937Box 156 \ 1  scan0319
Quotation from The British Thermostat Co. Ltd. for 200 Drop-in Type Thermostats.12th Nov 1937Box 156 \ 1  scan0320
Quotation from S. Smith & Sons for Smiths Bellows type Thermostats.12th Nov 1937Box 156 \ 1  scan0321
Confirming the decision to adopt a complete thermostat unit from an external supplier.13th Nov 1937Box 156 \ 1  scan0322
Returning an incorrect thermostat for a replacement from Messrs. S. Smith & Sons.15th Nov 1937Box 156 \ 1  scan0323
Letter to Messrs. S. Smith & Sons Ltd regarding a quotation and the return of a unit.15th Nov 1937Box 156 \ 1  scan0324
Letter from S. Smith & Sons (Motor Accessories) Ltd confirming the despatch of a B.V. Thermostat for testing.16th Nov 1937Box 156 \ 1  scan0325
Arrangement of the thermostat, piping, and other connections for the Bentley 111.17th Nov 1937Box 156 \ 1  scan0326
Letter to Dennis Bros. Ltd. requesting information on thermostat operational issues due to cooling water deposits.23th Nov 1937Box 156 \ 1  scan0327
Costs of various aluminium castings for different vehicle parts.23th Nov 1937Box 156 \ 1  scan0328
Cost comparison for iron castings between outside suppliers and in-house foundry.23th Nov 1937Box 156 \ 1  scan0329
Thermostat assembly failure during endurance testing due to the bellows rubbing on the aluminium casting.25th Nov 1937Box 156 \ 1  scan0330
Sketch showing the cause of thermostat failure due to the casing's actual contour fouling the bellows.23th Nov 1937Box 156 \ 1  scan0331
Letter from Dennis Bros Ltd discussing issues with thermostat bellows caused by hard water and proposing an alternative design.25th Nov 1937Box 156 \ 1  scan0332
Letter from Dennis Brothers Limited discussing the service life and performance of thermostat bellows.27th Nov 1937Box 156 \ 1  scan0333
Letter from Dennis Brothers Ltd. regarding sending a corrected blueprint for a thermostat arrangement.27th Nov 1937Box 156 \ 1  scan0334
Letter to a supplier regarding the production and supply of a thermostat unit for a Bentley.29th Nov 1937Box 156 \ 1  scan0335
Inquiry to AC-Sphinx Sparking Plug Co. Ltd. regarding the potential supply of Harrison thermostats.30th Nov 1937Box 156 \ 1  scan0336
Letter from AC-Sphinx Sparking Plug Co. Ltd. regarding the potential manufacturing of the Harrison thermostat.1st Dec 1937Box 156 \ 1  scan0337
Letter to The British Thermostat Co. Ltd. discussing methods for fixing an internal tube to a bellows plate.3rd Dec 1937Box 156 \ 1  scan0338
Letter regarding the manufacturing process for a tube and bellows plate, advising a delay on drawing alterations.6th Dec 1937Box 156 \ 1  scan0339
Instructions for setting and checking the thermostat unit for the 'M' Series Bentley.8th Dec 1937Box 156 \ 1  scan0340
Instructions for the assembly, testing, and supply of thermostat units and associated components.3rd Dec 1937Box 156 \ 1  scan0341
Letter requesting quotations for three different types of thermostat units from The British Thermostat Co. Ltd.8th Dec 1937Box 156 \ 1  scan0342
Request for a quotation for thermostat units.8th Dec 1937Box 156 \ 1  scan0343
Letter to S. Smith & Sons, Ltd. regarding an American thermostat being sent for inspection.14th Dec 1937Box 156 \ 1  scan0344
Instructing the dispatch of a thermostat made by Harrison Radiator Corporation to Messrs. Smiths for examination.14th Dec 1937Box 156 \ 1  scan0345
Quotation from The British Thermostat Co. Ltd. for various types of thermostats.14th Dec 1937Box 156 \ 1  scan0346
Quotation for thermostats from The British Thermostat Co., Ltd.14th Dec 1937Box 156 \ 1  scan0347
Invoice from S. Smith & Sons (M.A.) Ltd for a thermostat and a request for payment instructions.15th Dec 1937Box 156 \ 1  scan0348
Request to fit a thermostat scheme to a B.23.AE car.16th Dec 1937Box 156 \ 1  scan0349
Design considerations for the Bentley 50 thermostat and fan drive system.17th Dec 1937Box 156 \ 1  scan0350
Water flow arrangement for a project engine with a conventional valve layout.17th Dec 1937Box 156 \ 1  scan0351
Requesting the order of a thermostat unit and related parts for 'M' series Bentley cars.17th Dec 1937Box 156 \ 1  scan0352
Letter to The British Thermostat Co. Ltd. requesting a sample thermostat.17th Dec 1937Box 156 \ 1  scan0353
Letter from The British Thermostat Co. Ltd. enclosing Drawing No. BGA. 3786 for a Bellows Unit.18th Dec 1937Box 156 \ 1  scan0354
Letter from S. Smith & Sons acknowledging correspondence regarding a thermostat.20th Dec 1937Box 156 \ 1  scan0355


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