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United States Patent | 3,978,479 |
Schmitz | August 31, 1976 |
A security system adapted for monitoring fire, intrusion, and other alarm conditions employs solid state technology to appropriately identify the monitored alarm conditions and initiate appropriate responses. A "one chip" integrated semiconductor circuit functions as the primary electronics of a master control console to accept both remotely initiated as well as locally initiated input signals and to process the signals and initiate appropriate control and alarm signals. Included on the integrated semiconductor circuit are a digital noise generator circuit, input comparator and latch circuits, system test and reset circuits, and logic circuits for developing digital output signals to both activate monitoring channels and identify the type of alarm condition present.
Inventors: | Schmitz; Lawrence S. (Costa Mesa, CA) |
Assignee: |
Westinghouse Electric Corporation
(Pittsburgh,
PA)
|
Appl. No.: | 05/582,553 |
Filed: | May 29, 1975 |
Current U.S. Class: | 340/502 ; 340/511; 340/515; 340/519; 340/521; 340/529; 340/541; 340/593; 379/42 |
Current International Class: | G08B 19/00 (20060101); G08B 29/08 (20060101); G08B 29/14 (20060101); G08B 25/01 (20060101); G08B 29/06 (20060101); G08B 29/00 (20060101); G08B 019/00 (); G08B 029/00 () |
Field of Search: | 340/420,416,410,414,226,213R,253C,384E,409,312,279,276 |
3188392 | June 1965 | Ferrell |
3510863 | May 1970 | McBrian |
3582949 | June 1971 | Forst |
3594788 | July 1971 | Seelig |
3641570 | February 1972 | Thompson |
3678509 | July 1972 | Carlo et al. |
3699569 | October 1972 | Lee |
3750131 | July 1973 | Fletcher et al. |
3803568 | April 1974 | Higashide |
3818433 | June 1974 | Okamoto et al. |