Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1991-03-25
1994-02-15
Williams, Howard L.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
361187, 361205, H01H 4700
Patent
active
052872432
ABSTRACT:
Disclosed is a circuit device enabling an electromagnetic switch to be used with an A.C. power source. And the coil is thereof provided with a more stable electromagnetic field. The circuit device includes a releasing voltage detecting circuit, an engaging voltage detecting circuit, an nonstandard AND gate circuit connected to the detecting circuits, and a coil-holding circuit connected so that when there is an engaging voltage in the circuit device, the electromagnetic switch is energized and the coil is kept in a holding state. When there is a releasing voltage, the switch is de-energized.
REFERENCES:
patent: 4452210 (1984-06-01), Sasayama et al.
patent: 4650052 (1987-03-01), Okada
patent: 4878147 (1989-10-01), Oyama et al.
patent: 4925156 (1990-05-01), Stoll et al.
Elms Richard
Industrial Technology Research Institute
Liauh W. Wayne
Williams Howard L.
LandOfFree
Circuit device for electromagnetic switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit device for electromagnetic switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit device for electromagnetic switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1211878