GB917474A - Motor drive unit for electric shavers - Google Patents

Abstract

917,474. Reciprocating motors. SCHICK Inc. June 22, 1961 [March 31, 1961], No. 22614/61. Class 35. An electric-shaver motor-drive unit comprises a U-shaped field magnet 1 the legs of which comprise the pole arms, non-magnetic bridge-pieces 3, 4 uniting the arms, an armature 6 having a shaft 7 mounted in the bridge-pieces, a laterally projecting flange 10 connected with one of the bridge-pieces and overlying the armature, a stub shaft 11 mounted on the flange and extending in a direction perpendicular to the armature shaft 7, a bifurcated drive member 12 mounted for rotation on the stub shaft 11 with its prongs 13 extending in the same direction as and on either side of the stub shaft and being free to oscillate about the axis of the stub shaft, and an actuating lever 16 coupled to the armature for oscillation thereby, the free end of the lever being engaged with the drive member and operative upon movement of the armature to oscillate the prongs. The flange 10 is an integral part of the bridge-piece 3 (Fig. 3, not shown) through an opening 20 of which is passed the vertical extension 19 of a plate portion 17 forming the actuating lever 16 which is secured to the armature by rivets 18. To the upper end 24 of extension 19 is welded a ball 25 which seats in a recess 26 formed in the drive member 12 so that as the armature 6 vibrates against and with springs 30 the lever 16 oscillates the plastic drive member 12 about the stub shaft axis and causes the upper ends of the prongs to reciprocate the inner cutters 14 of the shaver in opposite directions.