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).
Page 2 of a patent specification detailing the construction and claims for a vehicle heating and windscreen demisting device.
| Identifier | ExFiles\Box 147\2\ scan0226 | |
| Date | 10th May 1938 | |
| 2 514,566 above-described connection of the blower with the heater ensures a compact, flat design of the entire heating device which requires practically no more space than 5 the vehicle heater alone and which is considerably cheaper than known forms of construction owing to the elimination of a second driving motor. To further simplify installation of the 10 heating device, it is preferable to arrange the blower housing 25 with its tangential outlet 30 pivotally on the heater so that the outlet 30 can easily be brought into the most favourable angular position for 15 conducting to the nozzles 20. This, for instance, can be effected by a screw connection 31 with adjusting slots 32 (Figure 3) or through a clamping connection. It is also advantageous to fasten 20 the blower wheel 23 and the blower housing 25 to motor shaft 24 and casing 26 of the heater 1 respectively so as to be easily detached, in order that these parts can easily be exchanged for a cover plate 25 if the heating device is required without the additional device for the wind-screen heating. If necessary, the impeller 23 can be connected with the motor shaft 24 through 30 a disengagable coupling, e.g. electromagnetic, so that the wind-screen heating can be switched on or off as desired. The distributor nozzles consist in the usual way of the flattened, funnel-shaped 35 nozzle body 20 and a deflecting plate 21, both of which have flanges for fastening to the dash board underneath the windscreen. In contrast to the known forms of construction the nozzle bodies according 40 to the invention are, however, arranged symmetrically to the axis of the inlet pipe 34 so as to prevent excessive lateral dispersion of the hot air. Having now particularly described and 45 ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is:— 1. Heating device for power driven 50 vehicles having a heater for heating the air in the vehicle provided with a propeller blade (fan) driven by an electro-motor and an additional blower for blowing hot air on the wind-screen, both the propeller blade and the blower being 55 adapted to draw air from inside the body of the vehicle characterised in that the additional blower for the wind-screen heating and the propeller blade of the vehicle heater are driven by the same 60 electro-motor. 2. Heating device according to Claim 1, characterised in that the impeller of the additional blower is arranged on the end of the shaft of the electric driving motor 65 directed away from the propeller blade. 3. Heating device according to Claims 1 and 2, characterised in that the impeller of the additional blower and its housing are connected with the motor shaft and the 70 vehicle heater housing respectively so as to be easily detachable and replaceable by a cover plate. 4. Heating device according to Claims 1 to 3, characterised in that the additional 75 blower casing is attached to the heater housing so that it can be pivoted and adjusted. 5. Heating device according to Claims 1 to 4, characterised in that the impeller of 80 the additional blower is connected with the main heater motor shaft through a disengagable coupling. 6. Heating device according to Claims 1 to 5 with flat distributor nozzles for 85 supplying hot air to the wind-screen, characterised in that the distributor nozzles are constructed symmetrically to the central axis of their inlet pipe. 7. Heating device for power driven 90 vehicles adapted for heating the air in the vehicle and for blowing hot air against the wind-screen substantially as herein described and as shown in the accompanying drawing. 95 Dated this 10th day of May, 1938. HERON ROGERS & CO., Agents for Applicants, Bridge House, 181, Queen Victoria Street, London, E.C.4. Leamington Spa: Printed for His Majesty's Stationery Office, by the Courier Press.—1939. | ||