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).
Patent specification for a heating device for power-driven vehicles.
| Identifier | ExFiles\Box 147\2\ scan0225 | |
| Date | 10th May 1938 | |
| PATENT SPECIFICATION Convention Date (Germany) : May 11, 1937. Application Date (In United Kingdom) : May 10, 1938. Complete Specification Accepted : Nov. 13, 1939. 514,566 No. 13943/38. COMPLETE SPECIFICATION Heating Device for Power Driven Vehicles We, CLAYTON DEWANDRE COMPANY LIMITED, a British Company, of Titanic Works, Lincoln, England (assignees of ROBERT BOSCH AKTIENGESELLSCHAFT, a Joint Stock Company organised under the Laws of Germany, of 4, Militarstrasse, Stuttgart, Germany), do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:— This invention relates to a heating device for power driven vehicles with a heater for heating the air inside the vehicle and a device for blowing hot air on to the wind-screen. In order to heat the air in the vehicle there is generally used a heater with a fan, driven by an electric motor which sucks air from the interior of the vehicle and transfers it back into the interior of the vehicle through the heater. This fan has to move a relatively large volume of air but as it has merely to circulate the air in the vehicle it need not develop any considerable air pressure. In order to keep the wind-screen clear, however, it is necessary to blow hot air against the wind-screen with considerable force and small centrifugal blowers (impellers) are therefore used for this purpose, likewise having electro-motor drive, by means of a separate second electro-motor. On account of the use of two electro-motors and the additional housing and supporting parts which are therefore necessary the known heating devices for vehicle and wind-screen heating have many parts and are expensive. In order to simplify these devices and bring them to a price which can be borne with smaller vehicles, according to the invention the blowers for the wind-screen heating and the propeller blade for the vehicle heater are both adapted to draw air from inside the vehicle body and are driven by the same electro-motor. In this way it is possible, moreover, to unite the centrifugal blower, the propeller blade, their drive and the heating element or elements into a unit taking up little space. According to one form of the invention in which the heating device has a motor inside a circular or cylindrical heating body, the blower wheel for the wind-screen heating is connected direct with one end of the motor shaft and the propeller blade for the vehicle heating is connected with the other end of the motor shaft, if necessary, with the interposition of a disengagable coupling. One example of construction according to the invention is shown in the accompanying drawing in which :— Figure 1 is a complete view of the heating device, Figure 2 is a partial section of the heater, Figure 3 is a plan of the heater, Figure 4 is a partial view of heater according to Figure 2 without centrifugal blower, Figure 5 is a section on line V—V of Figure 1. The heater 10 is connected in the known manner by feed pipe 11 and a return pipe 12 to the cooling water circuit of the combustion engine of the power vehicle. By means of a ventilator fan 14, driven by an electro-motor 13, air is sucked in an axial direction from the interior of the vehicle and is forced out again radially through a heating body 16 arranged annularly about the motor 13 and fitted with blades 15. At the rear of the heater 10 there is fitted a centrifugal blower 17 which sucks its air over the heating body 16 and blows the sucked-in hot air through a pipe 18 with branch pipes 19 to nozzles 20 fitted with deflecting plates 21 by which the air is directed against the wind-screen 22. The impeller 23 of the blower is removably attached (e.g. by flat key) directly to the extended rear end of the shaft 24 of the electro-motor 13. The housing 25 of the blower is fitted direct to the rear closure plate 26 of the heater. The latter has an opening 27 which constitutes the air inlet to the blower. The interior of the heater is divided by a baffle plate 28 so that the air currents indicated by arrows in Figure 2 are produced. The baffle plate is a disc surrounding the electric motor annularly and attached to the motor housing by means of a bush-shaped projection 29. As can be seen from the drawing, the [Price 1/-] | ||