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 claim for a driving and steering gear for endless-track vehicles.
| Identifier | ExFiles\Box 147\4\ scan0202 | |
| Date | 15th May 1941 guessed | |
| gear rotating at greatly excessive speeds. The locking of the shafts 27a and 27b prevents this and also tends to cause the vehicle to travel straighter along a slope, such as a cambered road, and thus reduces the need for 5 engaging the slipping clutch to correct any tendency for the vehicle to turn. d) The tracks can be driven through the auxiliary drive by disengaging one cone clutch and engaging the slipping clutch when the main gear box 15 is in neutral 10 so that the vehicle can be turned about its own axis when stationary. HAVING NOW particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is :- 15 1. A driving and steering gear of the type described for endless-track vehicles, in which the supplementary drive comprises a single slipping clutch, a pair of reversing clutches driven by the slipping clutch and arranged in parallel to transmit the drive, respec- 20 tively, in opposite directions and means for engaging one or other reversing clutch selectively in accordance with the direction of a turn and for engaging the slipping clutch for a turn in either direction. 2. A gear according to claim 1 in which the 25 means for engaging the reversing clutches selectively comprises, for the purpose described, means normally engaging both reversing clutches and means for disengaging either one of them selectively and then engaging the slipping clutch. 13. | ||