Alarm circuit

Details Alarm circuit Alarm circuit

1977-07-11

1978-08-29

Pitts, Harold I.

Communications: electrical

Systems

Timer control

361 29, 3403094, G08B 100

Patent

active

041107420

ABSTRACT:
An alarm circuit is interlocked with the start circuit of power driven industrial machinery such as a coal tipple so that before the machinery can be started, an alarm must be energized for a predetermined time to alert personnel that the machine is about to start. In the event that the machinery is not started within a predetermined time after termination of the alarm, the whole cycle must be repeated.

REFERENCES:
patent: 4044288 (1977-08-01), Godfrey

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