초록 ▼

An electro-mechanical oscillator has a DC motor with an output shaft coupled to a ball screw. A ball nut riding on the ball screw is coupled to an output sleeve which moves linearly with the ball nut. When the ball nut reaches one of two extreme positions its direction of movement is reversed by rev

An electro-mechanical oscillator has a DC motor with an output shaft coupled to a ball screw. A ball nut riding on the ball screw is coupled to an output sleeve which moves linearly with the ball nut. When the ball nut reaches one of two extreme positions its direction of movement is reversed by reversing the polarity of the voltage supplied to the motor. A control board is provided for monitoring the position of the ball nut, for reversing the motor and for controlling the speed of the motion.

대표청구항 ▼

An electro-mechanical oscillator for reciprocal movement of at least one shower head, comprising: a DC pancake gear motor having input leads for applying voltage to the motor and an output shaft which rotates in one of two directions in accordance with the polarity of said voltage; a first member co

An electro-mechanical oscillator for reciprocal movement of at least one shower head, comprising: a DC pancake gear motor having input leads for applying voltage to the motor and an output shaft which rotates in one of two directions in accordance with the polarity of said voltage; a first member comprising a ball screw coupled to said output shaft; a second member comprising a ball nut means mounted on said first member for moving said second member linearly in accordance with rotation of said output shaft; a shower head operating shaft coupled to said second member; and reversing means for reversing the polarity of said voltage and accordingly reversing said DC pancake gear motor when said second member reaches predetermined positions so as to reverse the movement of the shower head in a somewhat instantaneous manner to prevent undesired dwell time of said shower head during reversal.