Rotary selector for record player - has motor drive engaged by interlocked rotary selector

摘要

The rotary motion is transmitted to the turntable by a drive wheel (55) and the motor drive shaft (57). The drive is engaged by moving a contact bar (49) that is normally held in the disenqaged mode by the position of a rotary switch (1). The switch has a profiled spring (13) that has contact blocks (25) and (27) that operate against a roller (29) that fixes position. When rotated (43,59) to select the operating speed, a double contact (69) is operated to engage the motor and cause the coupling to be made by moving the contact bar (49).