Annunciator

Details Annunciator Annunciator

1983-05-23

1985-02-05

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

337 79, 340644, 340652, 340664, 361 23, G08B 2100

Patent

active

044980779

ABSTRACT:
An indicator is provided for each of a number of preselected conditions and is actuated in response to the occurrence of the corresponding condition. The indicator remains actuated until manually reset even if the triggering condition no longer exists.

REFERENCES:
patent: 2614160 (1952-10-01), Foote et al.
patent: 3548399 (1970-12-01), Monigal et al.
patent: 3611036 (1971-10-01), Edson
patent: 3611364 (1971-10-01), Jones
patent: 3696364 (1972-10-01), Lavelle
patent: 3840780 (1974-10-01), Sons
patent: 3854089 (1974-12-01), Emler
patent: 4247849 (1981-01-01), Morris et al.
patent: 4390870 (1983-06-01), Michael
Devices for Liquid Level Indication and/or Control, FEA Devices, Inc., Santa Cruz, Calif.
Opto Coupler, Photo Triac Driver Output, Motorola, Inc., 1949.

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