| Description | Date | Identifier | |
| Design drawing for adaptors and a tap for a Clayton Heater. | 9th Dec 1938 | Box 137 \ 2 scan0261 | |
| Letter from Metalastik Ltd acknowledging a query regarding a car heater drive. | 12th Dec 1938 | Box 137 \ 2 scan0262 | |
| Letter from a rubber manufacturer regarding the vulcanising of a rubber sleeve for a car heater component. | 13th Dec 1938 | Box 137 \ 2 scan0263 | |
| Drawing of an assembly sleeve for a vulcanised connection. | 16th Dec 1938 | Box 137 \ 2 scan0264 | |
| The parts and blueprints required for a Smiths Car Heater assembly. | 15th Dec 1938 | Box 137 \ 2 scan0265 | |
| Letter from Metalastik Ltd regarding a drawing (SDC.1042) and a proposed alteration for a heater drive component. | 15th Dec 1938 | Box 137 \ 2 scan0266 | |
| Requesting the overhaul of one car heater motor and reversing the rotation of another. | 16th Dec 1938 | Box 137 \ 2 scan0267 | |
| Letter from S. Smith & Sons regarding a delayed quotation for an electric motor, providing a quote for an American alternative. | 17th Dec 1938 | Box 137 \ 2 scan0268 | |
| Requesting the production details for Wraith III car heaters. | 17th Dec 1938 | Box 137 \ 2 scan0269 | |
| Cost and feasibility of fitting a car heater to a Phantom III chassis. | 12th Dec 1938 | Box 137 \ 2 scan0270 | |
| Letter from S. Smith & Sons regarding test results and a design recommendation for a sample heater's twin outlet casting. | 20th Dec 1938 | Box 137 \ 2 scan0271 | |
| Revised quotation letter from S. Smith & Sons for De-mister Blowers. | 22th Dec 1938 | Box 137 \ 2 scan0272 | |
| Letter from S. Smith & Sons following up on a quotation for a heater sent for testing. | 22th Dec 1938 | Box 137 \ 2 scan0273 | |
| Suggestion to sell an obsolete Harrison car heater to A.F. Martindale. | 22th Dec 1938 | Box 137 \ 2 scan0274 | |
| Official order to be sent to Metalastik Ltd. for three heater flexible drives. | 22th Dec 1938 | Box 137 \ 2 scan0275 | |
| Letter from the Experimental Dept. to Metalastik Ltd. requesting three modified sample units. | 22th Dec 1938 | Box 137 \ 2 scan0276 | |
| Letter to A.C. Sphinx Sparking Plugs Ltd. altering a telephone order for heater units and defroster parts. | 23th Dec 1938 | Box 137 \ 2 scan0277 | |
| Internal request to place an official order for car heater and defroster parts with AC-Sphinx Sparking Plug Co. Ltd. | 23th Dec 1938 | Box 137 \ 2 scan0278 | |
| Letter to Leyland & Birmingham Rubber Co. Ltd regarding the despatch of adaptor pieces for a car heater drive. | 29th Dec 1938 | Box 137 \ 2 scan0279 | |
| Options and recommendation for a combined car heater and defroster for a new Wraith car. | 29th Dec 1938 | Box 137 \ 2 scan0280 | |
| The design and application of a windscreen defroster. | 29th Dec 1938 | Box 137 \ 2 scan0281 | |
| Requesting an order for three Smiths Hadees car heaters. | 30th Dec 1938 | Box 137 \ 2 scan0282 | |
| Graph comparing the air output of Hadees and Smith fans and blowers at different speeds. | 14th Nov 1938 | Box 137 \ 2 scan0283 | |
| Letter from The Leyland & Birmingham Rubber Co Ltd regarding adaptor pieces for bonding to a rubber sleeve for a car heater. | 31th Dec 1938 | Box 137 \ 2 scan0284 | |
| Follow-up memo requesting a reply about parts for installing a Clayton Heater on the Phantom III chassis. | 12th Dec 1938 | Box 137 \ 3 scan0001 | |
| Letter from Hallam, Sleigh & Cheston regarding their 'Widney Klampon' car heater. | 4th Jan 1939 | Box 137 \ 3 scan0002 | |
| Customer testimonial letter regarding the performance of a Widney Klampon Heater installed in a 20 HP car. | 3rd Jan 1939 | Box 137 \ 3 scan0003 | |
| Specification sheet for the Widney Tritherm low-pressure steam or water heater for motor car interiors. | 4th Jan 1939 | Box 137 \ 3 scan0004 | |
| Letter from The Leyland & Birmingham Rubber Co. Ltd. confirming receipt of 4 adaptor pieces for bonding to a rubber sleeve for a car heater drive. | 4th Jan 1939 | Box 137 \ 3 scan0005 | |
| Modification of a pump casing for car heater connections on chassis 35.EX. | 6th Jan 1939 | Box 137 \ 3 scan0006 | |
| Invoice from AC-Sphinx Sparking Plug Co. for De-Frosters that were supplied without an official order. | 6th Jan 1939 | Box 137 \ 3 scan0007 | |
| Letter to Hallam Sleigh & Cheston requesting cost information for the 'Tritherm' heater and its components. | 6th Jan 1939 | Box 137 \ 3 scan0008 | |
| Letter from a vehicle fittings manufacturer regarding a quotation for heaters. | 10th Jan 1939 | Box 137 \ 3 scan0009 | |
| Recommendation to make the car heater water connections for the Phantom III model identical to those on the Wraith. | 11th Jan 1939 | Box 137 \ 3 scan0010 | |
| Risk of blowing the ignition fuse by connecting car heaters to it and proposing solutions. | 12th Jan 1939 | Box 137 \ 3 scan0011 | |
| Request to trial an external windscreen defrosting scheme on chassis 1.B.50. | 12th Jan 1939 | Box 137 \ 3 scan0012 | |
| Despatch note for the return of two HaDees Car Heaters to S. Smith & Sons Ltd for credit. | 12th Jan 1939 | Box 137 \ 3 scan0013 | |
| Letter from The Leyland & Birmingham Rubber Co. Ltd. confirming the dispatch of rubber bonded couplings. | 13th Jan 1939 | Box 137 \ 3 scan0014 | |
| Instructing to order a further three sets of parts to enable a Smiths Heater to be fitted. | 14th Jan 1939 | Box 137 \ 3 scan0015 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. complaining about faulty car heater connections. | 16th Jan 1939 | Box 137 \ 3 scan0016 | |
| Official order to be sent to A.C.-Sphinx Ltd. for one standard car heater for a Wraith car. | 16th Jan 1939 | Box 137 \ 3 scan0017 | |
| Letter from a supplier regarding manufacturing difficulties and an alternative bonding method for car heater couplings. | 17th Jan 1939 | Box 137 \ 3 scan0018 | |
| Electrical wiring of car heaters, proposing a new scheme to prevent engine failure and provide a warning light. | 19th Jan 1939 | Box 137 \ 3 scan0019 | |
| Letter from Hallam, Sleigh & Cheston confirming a meeting appointment. | 20th Jan 1939 | Box 137 \ 3 scan0020 | |
| Car interior heating, ventilation, and the comparative testing of proprietary heater units. | 23th Jan 1939 | Box 137 \ 3 scan0021 | |
| The ideal principles of car interior air conditioning and methods of heating tested. | 23th Jan 1938 | Box 137 \ 3 scan0022 | |
| Comparison of different car heating and ventilating methods, detailing their respective disadvantages. | 21th Jan 1939 | Box 137 \ 3 scan0023 | |
| The placement of vehicle heating, ventilation, and defrosting system components. | 23th Jan 1939 | Box 137 \ 3 scan0024 | |
| Tests and conclusions regarding various proprietary windscreen demisting and defrosting heater units. | 23th Jan 1939 | Box 137 \ 3 scan0025 | |
| Summary and comparison of different car heating, ventilation, and demisting system options and their costs. | 22th Jan 1939 | Box 137 \ 3 scan0026 | |
| Recommendation on the type of car heating system to be developed and installed in experimental and production vehicles. | 23th Jan 1939 | Box 137 \ 3 scan0027 | |
| Letter from a vehicle fittings manufacturer confirming a telephone conversation and proposing a new appointment. | 25th Jan 1939 | Box 137 \ 3 scan0028 | |
| Inquiry about installing a Stewart-Warner 'South Wind' heater into a Phantom III in Belgium. | 27th Jan 1939 | Box 137 \ 3 scan0029 | |
| Advertising pamphlet for the 'South Wind' car heater developed by Stewart-Warner. | 27th Jan 1939 | Box 137 \ 3 scan0030 | |
| Advertisement for the Stewart-Warner 'South Wind' gasoline car heater, featuring a technical diagram and safety report. | 28th Jan 1939 | Box 137 \ 3 scan0031 | |
| Request to send car heater parts to Messrs. John Marston Ltd. for rebuilding. | 28th Jan 1939 | Box 137 \ 3 scan0032 | |
| Letter from a supplier discussing details of heating equipment and a flash coil boiler. | 30th Jan 1939 | Box 137 \ 3 scan0033 | |
| Letter from Hallam, Sleigh & Cheston regarding a new type of water heating system. | 30th Jan 1939 | Box 137 \ 3 scan0034 | |
| Options for interior heating, ventilation, and defrosting systems. | 3rd Feb 1939 | Box 137 \ 3 scan0035 | |
| Development and testing of car demister and defroster systems using hot air from the bonnet versus dedicated heaters. | 3rd Feb 1939 | Box 137 \ 3 scan0036 | |
| Internal memorandum regarding the design and installation of heaters and defrosters for specific vehicles. | 3rd Feb 1939 | Box 137 \ 3 scan0037 | |
| Confirming the location of the N.Y. World's Fair chassis (3-DL-156) and a coachbuilder's factory move. | 6th Feb 1939 | Box 137 \ 3 scan0038 | |
| Request to modify the defroster louvres for supplying under-bonnet air to the outside of the windscreen. | 7th Feb 1939 | Box 137 \ 3 scan0039 | |
| Letter from a supplier regarding poorly bonded rubber on car heater couplings and the provision of new samples for testing. | 8th Feb 1939 | Box 137 \ 3 scan0040 | |
| Correspondence regarding the final design and demonstration of a new under-seat air conditioner. | 9th Feb 1939 | Box 137 \ 3 scan0041 | |
| Evaluation of a Nash car air conditioning and heating plant offered for sale. | 11th Feb 1939 | Box 137 \ 3 scan0042 | |
| Works order for the supply of a car heater with fittings and defroster parts for chassis WXA.1. | 17th Feb 1939 | Box 137 \ 3 scan0043 | |
| Scheme detailing the features and changes for the car heater and defroster, model D.CD.1204. | 17th Feb 1939 | Box 137 \ 3 scan0044 | |
| Heater fitting hose failures and reverting to the original two-tap system. | 17th Feb 1939 | Box 137 \ 3 scan0045 | |
| Letter to a supplier, Messrs. Rotherham & Sons Ltd., inquiring about a custom brass tap for car heaters. | 17th Feb 1939 | Box 137 \ 3 scan0046 | |
| Letter from Rotherham & Sons Ltd. discussing the production of taps with connections suitable for rubber hoses. | 18th Feb 1939 | Box 137 \ 3 scan0047 | |
| Drawing of a lever-operated valve or drain tap. | 23th Feb 1939 | Box 137 \ 3 scan0048 | |
| Letter to S. Smith & Sons regarding the manufacture of a heater and a petrol tank design. | 23th Feb 1939 | Box 137 \ 3 scan0049 | |
| Requesting the return of a borrowed Nash air conditioning unit submitted for examination. | 24th Feb 1939 | Box 137 \ 3 scan0050 | |
| Letter from S. Smith & Sons regarding a gearless attachment and a heater. | 24th Feb 1939 | Box 137 \ 3 scan0051 | |
| Return of a Nash Air-conditioning Unit because it was too bulky for their cars. | 27th Feb 1939 | Box 137 \ 3 scan0052 | |
| Request to return a Nash Air-Conditioning Unit that was sent for examination. | 27th Feb 1939 | Box 137 \ 3 scan0053 | |
| Internal correspondence regarding the installation of car heaters and an order for rubber tubing for a coachbuilder. | 26th Feb 1939 | Box 137 \ 3 scan0054 | |
| Requesting the despatch of 22 ft. of car heater rubber tube to Messrs. Hoopers. | 1st Mar 1939 | Box 137 \ 3 scan0055 | |
| The sale of an obsolete Clayton car heater to T. Fisher. | 10th Mar 1939 | Box 137 \ 3 scan0056 | |
| Listing blueprints for a car heater and defroster, and requesting an order from a supplier. | 13th Mar 1939 | Box 137 \ 3 scan0057 | |
| Parts list and instructions for securing a heater and motor to the dashboard. | 13th Mar 1939 | Box 137 \ 3 scan0058 | |
| Letter from John Marston Ltd proposing a modification to the R.R. Car Heater DCD.1204. | 14th Mar 1939 | Box 137 \ 3 scan0059 | |
| Proposed modification to a car heater for conversion into a one-piece unit, with alternative mounting methods. | 10th Mar 1939 | Box 137 \ 3 scan0060 | |
| Internal memorandum requesting an order for 6 R.R. type car heaters from Messrs. John Marston Ltd. | 15th Mar 1939 | Box 137 \ 3 scan0061 | |
| The progress on interior heating, ventilation, defrosting, and demisting systems for cars. | 15th Mar 1939 | Box 137 \ 3 scan0062 | |
| Failure of heater motors and a design modification by Joseph Lucas Ltd. | 15th Mar 1939 | Box 137 \ 3 scan0063 | |
| Letter to John Marston Ltd. regarding alterations to a car heater and the B.38 radiator. | 16th Mar 1939 | Box 137 \ 3 scan0064 | |
| Interior heating, ventilation, defrosting, and demisting of cars. | 24th Mar 1939 | Box 137 \ 3 scan0065 | |
| On the development of a fresh air heating scheme, clarifying the distinction from 'Air-conditioning'. | 25th Mar 1939 | Box 137 \ 3 scan0066 | |
| Letter to S. Smith & Sons Ltd. regarding the return of two unused 'Hadees' car heaters. | 28th Mar 1939 | Box 137 \ 3 scan0067 | |
| Letter from S. Smith & Sons regarding the return and credit for two car heaters. | 30th Mar 1939 | Box 137 \ 3 scan0068 | |
| The despatch of two HaDees car heaters to S. Smith & Sons Ltd. | 1st Apr 1939 | Box 137 \ 3 scan0069 | |
| Credit agreement for two car heaters from S. Smith & Sons Ltd. | 3rd Apr 1939 | Box 137 \ 3 scan0070 | |
| Letter from Brooklands of Bond Street following up on an Air Conditioning Unit submitted for testing. | 22th Apr 1939 | Box 137 \ 3 scan0071 | |
| Urgent request for parts for a car heater for chassis 30.G.VII, required by John Marstons Ltd. | 26th Apr 1939 | Box 137 \ 3 scan0072 | |
| Request to order 12 heater motors and 12 rheostat switches for R.R. Marston heaters. | 28th Apr 1939 | Box 137 \ 3 scan0073 | |
| Letter to John Marston Ltd. regarding an order for six car heaters and the return of a borrowed pressure gauge. | 28th Apr 1939 | Box 137 \ 3 scan0074 | |
| Letter from John Marston Ltd regarding the sourcing and supply of parts for car heaters. | 28th Apr 1939 | Box 137 \ 3 scan0075 | |
| Request to draw up a scheme for fitting an AC heater on the dashboard with a separate electric motor and flexible drive. | 29th Apr 1939 | Box 137 \ 3 scan0076 | |
| | | | |
