GB797649A - Vibrator motor - Google Patents

Abstract

797,649. Reciprocating motors. SCHICK, Inc. Nov. 9, 1956 [July 6, 1956], No. 34357/56. Class 35. In a vibrator motor for reciprocating a driven element, e.g. an electric shaver cutter and comprising a substantially U - shaped field magnetic core 1, part of which is encircled by a field coil 20, an armature magnetic core 10 mounted for pivotal movement relative to the field core 1, and a spring 30 acting on the armature, the armature core is substantially L-shaped and has its vertical leg 11 disposed along the outer side of one field core leg 3 and pivoted at its lower end on the field core, the horizontal leg 12 of the armature extends over the free end of one leg 3 into proximity with the free end of the other field core leg 2, and the spring 30 when the motor is unenergized holds the armature in a median position in its stroke. As shown, the armature is pivoted by a knife edge 15 at its lower end which edge engages a notch 14 in a shoulder 13 in the leg 3, and a further shoulder 21 seats the coil 20 which also encircles the armature leg 11 and is retained in position by a deformable finger 41 on a side plate 40 riveted to the field core 1 and having an upstanding lug 42 to which one end of the spring 30 is riveted; the other end of spring 30 seats in a notch 43 in the armature core. Adjacent faces of the armature and field core legs 11, 3 are complementarily arcuately curved and provide a tapering air gap therebetween when the motor is not energized. At the top of the armature a tip 33 is movable in operation into a complementary recess 32 in the field core leg 2 and either an actuator 31 or an extended core lamination, not shown, projects to connect to the driven element. The motor is for operation by alternating current.