Circuit for controlling operation of a load after a predetermine

Details Circuit for controlling operation of a load after a predetermine Circuit for controlling operation of a load after a predetermine

1996-01-22

1998-01-06

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

Specific condition

327457, 340530, G08B 2100

Patent

active

057059870

ABSTRACT:
A circuit for controlling operation of a load, such as an alarm circuit in a fire protection system, in which operation of the load is delayed for an adjustable time period. The load control circuit includes a DIAC for generating a first trigger signal, an SCR which generates a second trigger signal, and a switch, preferably a TRIAC, which provides a supply voltage to the load upon receipt of the second trigger signal. A variable resistor is provided to adjust the time required to generate the first trigger signal.

REFERENCES:
patent: 3176284 (1965-03-01), Jones et al.
patent: 3597632 (1971-08-01), Vandemore et al.
patent: 3623088 (1971-11-01), Peterson
patent: 3688130 (1972-08-01), Granieri
patent: 3713126 (1973-01-01), Stettner
patent: 3715623 (1973-02-01), Szabo
patent: 3740585 (1973-06-01), Squiers
patent: 3742337 (1973-06-01), Digneffe
patent: 3745382 (1973-07-01), Hoge et al.
patent: 3746887 (1973-07-01), Lorenz
patent: 3749864 (1973-07-01), Tice
patent: 3764832 (1973-10-01), Stettner
patent: 3794858 (1974-02-01), Squiers
patent: 3846648 (1974-11-01), Scott
patent: 3940634 (1976-02-01), Grogan
patent: 4103294 (1978-07-01), Stettner et al.
patent: 4152608 (1979-05-01), Nakasone et al.
patent: 4331914 (1982-05-01), Huber
patent: 4382192 (1983-05-01), Mendelson
patent: 4458239 (1984-07-01), Willey et al.
patent: 4745311 (1988-05-01), Iwasaki
patent: 4791254 (1988-12-01), Polverari
patent: 5036234 (1991-07-01), Friedrich et al.
patent: 5323062 (1994-06-01), Crawford et al.

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