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).
Description of a preferred construction for a gear system involving slipping and reversing clutches.
| Identifier | ExFiles\Box 147\4\ scan0193 | |
| Date | 15th May 1941 guessed | |
| keep the vehicle on a straight course, as well as increasing the life of, and reducing the heat to be dissipated from, the slipping clutch. In a preferred construction, the gear comprises 5 a shaft driven by the slipping clutch and having the driving member of one reversing clutch secured on it and the driving member of the other reversing clutch connected to it for common rotation but with freedom for limited axial movement and having the driven members 10 of the two reversing clutches rotatable about the portion of its length between the two said driving members, means for restraining the said driven members from axial move- ment, a spring compressed between abutments on the shaft and the second said driving member to move them axially 15 relatively to one another and engage both clutches, and means for selectively moving axially either the second said clutch member or the shaft to disengage one or other clutch. Conveniently compressed air is employed for the 20 control of the reversing clutch and the slipping clutches. Preferably the driving member of the slipping clutch is driven directly from the engine of the vehicle so that it is rotating at a high speed at all times when the engine is running. This facilitates the dissipation of 25 heat from that clutch. Two embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings in which :- Figure 1 is a diagram showing the invention 30 incorporated in a driving and steering gear of the controlled-epicyclic type. 4. | ||