Sughrue, Mion, Zinn, Macpeak & Seas
Pedal assembly in sewing machine with potentiometer control device
 In the pedal assembly of a sewing machine drive device, a potentiometer operating member is guided by a mounting stand secured to the pedal stand, to control the slide shaft of a direct acting type potentiometer, and a speed changing pedal including a depressing board to depress the potentiometer operating member with its one end portion is coupled to the pedal stand with the other end portion. When the speed changing pedal is stepped on, a signal is outputted to change the speed of rotation of the sewing machine according the movement of the pedal thus stepped on. The pedal stand may have an opening with which the pedal is swingably engaged. In addition, signal pedals may be arranged in alignment with the speed changing pedal with the same mounting means provided at the position of those pedals, so as to allow the pedals to swap in position with one another. 
Mitsubishi Denki K.K.
G Y D
G05G Y10T D05B
inventional additional inventional
Keiichi Tatsuya Hiroshi
Takikoshi Sawato Yamada