Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1993-05-03
1997-01-21
Shoop, Jr., William M.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
361173, 361174, 361176, 340328, 3403881, 3403885, G10K 1063, H04M 1104, G08B 300
Patent
active
055964770
ABSTRACT:
A contactless signaling device for operating a horn or bell is disclosed. The signaling device has an electro-magnetic coil which drives an armature. A light source is positioned opposite a light sensor and a shutter portion of the armature moves between the source and the sensor periodically blocking the light flow. The light sensor is in electrical communication with the electro-magnetic coil. A spring connected to the armature moves the shutter portion when current is not supplied to the coil thereby supplying the desired pulsing as the armature striker engages a horn diaphragm or bell gong.
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Brochure reference, Fire Alarm Signaling Devices--6100/5500 Series, Faraday, Inc., 1990.
Brochure reference, Fire Alarm Signaling Devices--44/4700 Series, Faraday, Inc., 1990.
Faraday, Inc.
Ganjoo Peter
Shoop Jr. William M.
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