公开(公告)号：US3652955A

公开(公告)日：1972-03-28

申请号：US3652955D

申请日：1970-07-30

Applicant: GEN TIME CORP

Inventor： CRUGER RICHARD E ,  ANDERSON WILMER C ,  EARLS DAVID ,  WINDEBANK ROBERT W

IPC: G04C3/02 ,  G04C3/08 ,  H03B5/30

CPC classification number: G04C3/08 ,  G04C3/024 ,  H03B5/30

Abstract: An electrically driven oscillator device is provided with one or more electrets for establishing electrostatic coupling between a mechanical oscillating element and an electrical drive. The mechanical oscillating element can comprise a reed, a tuning fork, a pendulum, or a hair-spring balance wheel. The electrical drive can be an AC voltage source or an electronic feedback circuit. In electrically driven devices, electrets can be used in both the pickup and driving circuits to eliminate hysteresis. Alternatively, in order to isolate the pickup circuit from the driving circuit, electrets can be used in only one of these circuits and magnetic arrangements can be used in the other.

公开(公告)号：US3391389A

公开(公告)日：1968-07-02

申请号：US36587164

申请日：1964-05-08

Applicant: GEN TIME CORP

Inventor： CRUGER RICHARD E ,  INGENITO MICHAEL J

IPC: B05B12/02 ,  H03K9/06

CPC classification number: B05B12/02 ,  H03K9/06