| 摘要 |
714,709. Reverse-gear control. CLEVELAND PNEUMATIC TOOL CO. Oct. 30, 1951 [Oct. 30, 1950], No. 25370/51. Class 80 (2) [Also in Groups XXXVII and XXXVIII] The gear changing mechanism of a boat engine is moved to "forward," " neutral or "reverse" under the control of a selector switch 34. Movement of the switch to any position F, N, R, energizes a motor brake release magnet 40 in series with either the " forward " or " reverse " windings of a motor 16 dependent on the direction of movement of the switch. The motor is thereby driven, in the appropriate sense, to rock the gear shift lever 14 to a corresponding position, through gearing 20 and a screw and nut 18, 22, e.g. as disclosed in Specification 569,245. The motor circuit is made through one of the brushes 66, 68, 70 on the arm 64 which reciprocates with the travelling nut 22 and the appropriate fixed contact plate 58 or 60. If the " forward " or " reverse " brush is operative the motor runs until the operative brush passes off the end of the associated contact plate. If the neutral" brush is operative the motor runs until the brush reaches the gap 72. In each case the motor circuit is broken and braked to a standstill by de-energization of the brake release magnet 40 when the gear shift lever 14 has reached the corresponding position. The motor 16, the brake mechanism 40, 48 and the switching means 66, 68, 70, 58, 60 are all mounted on the gear casing 20 which is pivoted at 30 to the framework.
|
