943330-A is referenced by 2 patents.
943,330. Selective signalling systems. CARL DROHMANN G.m.b.H. Oct. 4,1962 [Nov. 24, 1961], No. 37500/62. Heading G4H. A feed screw 3 is controlled to dispense a predetermined volume of a flowable material from a hopper 2 by presetting a counter 10 to an appropriate number. Drive shaft 4 is engaged by clutch plate 7,a perforated or notched disc 11 is sensed photoelectrically, inductively or capacatively and the pulses produced count down counter 10, clutch 7 being disengaged and brake 6 being engaged when the counter reaches zero.