Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1998-08-27
2000-02-01
Fleming, Fritz
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
361155, 361160, H01H 4700
Patent
active
060210389
ABSTRACT:
A control circuit for a latching solenoid incorporated in an electric door strike, the latching solenoid permitting the use of low power control pulses and the control circuit insuring reliable fail safe or fail secure operation with ready conversion between the two operating modes.
REFERENCES:
patent: 4257081 (1981-03-01), Sauer et al.
patent: 5347421 (1994-09-01), Alexanian
patent: 5654865 (1997-08-01), Ryan
patent: 5876073 (1999-03-01), Geringer et al.
patent: 5933067 (1999-08-01), Frolov
Fleming Fritz
Hanchett Entry Systems, Inc.
Lindsley Warren F. B.
McGue Frank J.
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