Vibrator motor for wireless silent alerting device

Details Vibrator motor for wireless silent alerting device Vibrator motor for wireless silent alerting device

1991-06-05

1992-04-21

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 3403111, 340407, 384255, H02K 7075, G08B 524, H04M 1102

Patent

active

051071550

ABSTRACT:
A small dc vibrator motor for use in a wireless alerting device includes a housing, a non-rotatable shaft fixed to the housing, a cylindrical magnet fixedly mounted on the shaft, and a rotor which is rotatably mounted on the shaft. The rotor includes a cylindrical coreless winding assembly between the magnet and the housing, and eccentric bearings, or combinations of concentric bearings and eccentric weights, on both ends of the winding assembly. The eccentric bearings, or the combinations of concentric bearings and eccentric weights, cause vibrations when the rotor rotates.

REFERENCES:
patent: 3911416 (1975-10-01), Feder
patent: 4864276 (1989-09-01), Tribbey et al.
patent: 5036239 (1991-07-01), Yamaguchi

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