GB190419499A - Improvements in or relating to Friction Driving and Reversing Gear. - Google Patents

Abstract

19,499. Hampson, F. G. Sept. 9. Driving - gear.- Relates to friction reversing - gearing for launches driven by petroleum-spirit motors and the like. The motor shaft A, Fig. 1, projecting into a fixed casing 0, is secured to a direct driving friction member D with conical driving-surface D', and to a second member E with a conical surface E' for reverse driving. A shell F, sliding on a feather on the driven shaft B, is provided with an internal conical surface F<1> for engaging with the surface D<1>, and with an external surface F' for engaging with conical pinions G. The pinions G are mounted upon studs G' carried by a frame G<2> consisting of inner and outer rings connected by spokes as shown in Fig. 2. The frame G<2> has a slight longitudinal play, but is prevented from rotating by lugs G<3> engaging slots in the casing C. A spiral spring B<3> communicates a thrust to the member F through a ball bearing B<2> which normally keeps the surfaces D', F' in contact for the direct speed. A hand-lever F<4> pivoted at C<3> is forked and connected to a ring F<3> engaging the member F through a ball bearing. When the member F is thrust to the left, the pinions G come into engagement with the rotating surface E', causing the surface F<2> and the shaft B to rotate in the reverse direction. By allowing the frame G<3> to slip inside a brake, the reverse speed may be diminished.