Patent GB-401146-A (GB)
Title: Improvements in change speed devices
IPC: F16H3/70
Filed: 1933-02-08
Abstract: 401,146. Variable - speed gearing; lubricating. JONG, J. DE, 108, Avenue Jan Van Rijswijck, Antwerp, Belgium. Feb. 8, 1933, No. 3895. Convention date, Feb. 10, 1932. [Class 80 (ii).] In a change-speed gear with constant internal mesh, the gears 10-14 and their supports form a fluid-tight conduit into which oil is injected by a pump 42. The gears are pressed together by means such as a spring 44, which permits escape of part of the oil if a certain pressure is exceeded. The cages 19, 20 in which the gears are supported are journalled in rings 21, 22, the oil being admitted from the conduit 43 through passages in the cage 20 and a fixed ring 23. For effecting the speed changes, the cages 19, 20 are adapted to be locked respectively to the driving and the driven shafts, or to the ring 23. The locking is effected by ball clutches 24-27 which are actuated by pivoted levers 38-31 under the action of cams 32a, 32b, 33a, 33b on rods 32 slidable by the usual hand lever 34. For the lowest speed, both cages 19, 20 are locked to the fixed ring 23 so that the reduction of each gear pair is used. For second speed, the cage 19 is locked to the driving-gear 10, so that the gears 11, 12 are solid with the driving-shaft and cage 20 is fixed so that the reduction of the pairs 12, 13 and 13, 14 is used. For third speed, cage 19 is fixed and cage 20 is keyed to the driven shaft, thus using only the reduction of the pairs 10, 11 and 11, 12. For the high speed or solid drive, the cage 19 is clutched to the driving-gear 10 and the cage 20 to the driven gear 14, as shown in Fig. 1. For reverse drive the pinion 39 splined on the driven shaft is slid by a fork 40 and a rod 41 operated by the lever 34 into engagement with the pinion 38 on the countershaft 36 which is constantly driven by a chain 37 from the driving shaft, the gears 11, 12, 13 being simultaneously brought into idling position. The Specification as open to inspection under Sect. 91 describes a reverse gear, Fig. 3 (Cancelled), which may be used instead of the reversing arrangement shown in Fig. 1. An internal gear 14a is mounted on a sleeve 14b concentric with a sleeve 50 splined to the driven shaft 14 and slidable by dogs 56 engaging a peripheral groove in the sleeve 50, passing through slots in the sleeve 14b and rotatably mounted in a non-rotatable ring 55 which may be slid along keys in the casing by a dog 63 connected to an operating-rod 62. A crank 69 engages in a crank 70 in the member 13 of the change-speed gear and carries a gear 15a. When the ring 55 is moved to the right from the position shown, splines 54 on the sleeve 50 engage corresponding splines in the sleeve 14b. The gear 13a thus drives the gear 14a, sleeves 14b and 50, and the shaft 14 at a reduced speed. When the ring 55 is moved to the left, splines 66 thereon engage splines 67 on the sleeve 14b, and the splined end of the sleeve 50 engages the pinion 15a. The sleeve 14b and gear 14a are thus held stationary, and the gear 13a is forced to roll round the gear 14a in a reverse direction, thus driving the crank 69, gear 15a, sleeve 50, and shaft 14 in a reverse direction. This subject-matter does not appear in the Specification as accepted.