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).
List of patent-style claims for a vehicle heater and defroster system.
| Identifier | ExFiles\Box 147\2\ scan0230 | |
| Date | 20th February 1940 guessed | |
| - 2 - Continued:- of the rail at the foot of the screen, and so produce a defrosting or demisting effect. CLAIMS. We declare that what we claim is:- 1. Heater devices having only one fan of the impeller type, driven by an electric motor mounted separately from the heating device, and driving the fan by a solid or flexible drive. This heater arranged to draw air either from inside or outside the vehicle and to provide alternatively heat to the interior of the car, to the defroster or to both at once. 2. Maximum efficiency obtained by providing a guide vane whereby air is led from the back of the matrix to the centre of the impeller. 3. Control of heat to car or defrosters or both, arranged by a rotating baffle, mounted either on bearings through the matrix or by other means, and controlled either directly on the heater, or by remote drive from the instrument board, 5. Defrosting ducts arranged non-symmetrically to the distributor pipes to obtain best air flow conditions on the screen, or alternatively no distributor nozzles at all, the air being distributed along the base of the windscreen by small ducts in the scuttle rail. | ||