Patent GB-190614518-A (GB)
Title: Improvements in Speed Changing Devices
Inventor: PAYNE CALVIN NATHANIEL
Filed: 1906-06-25
Granted: 1907-01-31
Abstract: 14,518. Payne, C. N. June 25. Variable-speed and reversing gearing; clutches. - Relates to variable - speed toothed gearing, applicable to motorcars, characterized by the use of a rotatable ball-actuating device within the countershaft for clutching loose gear-wheels in succession. The driving- shaft B, Fig. 1, is provided with a sleeve - like extension B<1> enveloping the end of the driven shaft C. When the direct speed is required, a cam-ring G is slid to the left and causes balls b<9>, resting in openings b<8> in the sleeve B', to enter recesses b<10> in the shaft C to effect a driving connexion. A pinion B<3>, mounted on a sleeve b<2> loose on the shaft B, meshes with a wheel D<1> secured to the countershaft D. When the countershaft speeds are required, a cam-ring B<4> is slid to the left, causing balls b<5> to enter recesses b<4> in the shaft B. At the same time, the ring G is slid to the right, disconnecting the shafts B, C and connecting to the shaft C, by means of balls c' &c., a sleeve C' which carries a series of fixed gear-wheels C<2>, C<3> C', C<5>. The countershaft D is provided with loose wheels D<2>, D<3>, D<4>, D<5> arranged to produce three intermediate speeds and a reverse, and their bosses have ball sockets d<2>, d<3>, d<4>, d<5>, respectively. Pairs of balls 2<D>, 3<D>, 4<D>, 5<D> are arranged in ball openings 2d, 3d, 4<d>, 5<d> in the shaft D so that they can be thrust out one pair at a time into the sockets d<2>, d<3>, d<4>, d<5> by a longitudinally-sliding actuating-device F. The device F, Figs. 7 and 10, is a cam which may rotate upon a spindle F<1> and is kept from sliding to the left by a shoulder f<9>. A block F<2> slides on a feather F<4> on the spindle F<1> and is pressed to the left by a spring F<3>. The block F<2> has helical teeth engaging helical recesses f<3> in the cam F, and the cam F has circumferentially-sloping inclines f the arrangement being such that if the sockets in a wheel-boss do not coincide with the openings in the shaft D under which the cam F slides, the cam F yields to the balls, which cannot move outwards, and turns on the spindle F<1>, pressing the block F<2> to the right. The cam F may turn so far that the balls enter longitudinal grooves f and allow the cam F to pass or have its longitudinal motion arrested in gear position until the sockets register with the openings when the balls yield, the block F<2> moves to the left, and the cam F turns back to its normal position. The spindle F<1> is operated from a shoulder F<6> by a pin f<11> sliding in a longitudinal slot d<7> in the shaft D and carried by a grooved collar F<7>. When the collar F<7> is in the position shown in Figs. 1 and 5, the reversing-gear which comprises an idler E is in action, as shown in Fig. 3. An operating-rod H is secured to a lug h on a slide H<1> which carries a bracket h<1> and forks engaging the ring F<7>. As the rod H is drawn to the left, Fig. 5, the gears D4, D3, D<2> come successively into action. The bracket h<1> then strikes a roller h<4>, carrying it towards the left of Fig. 5 and to the right of Fig. 1. A lever h<5> extends from the roller h<4> to a sleeve H<2> upon a pivot-pin H<3> and onwards to a fork h<6>, Fig. 3, engaging the ring G. The ring G is thrust to the left, Fig. 1, disengaging the sleeve C' and clutching the shafts B, C together directly. Further movement of the slide H', Fig. 5, causes a projection h<8> to strike a roller h<9>, turning a lever h<10> and fork h<11> about a pivot-pin H<6> and thrusting the ring B<4> to the right of Fig. 1 to disconnect the countershaft D. A suitable casing is provided in two parts A', A', Figs. 3 and 5, there being a removable cover A <4> held in place by a spring-bar a. Lubricating- rings, such as b, c, d, are provided where shown on Fig. 1.