Communications: electrical – Audible indication – Ultrasonic pest control
Patent
1984-05-07
1987-10-06
Caldwell, Sr., John W.
Communications: electrical
Audible indication
Ultrasonic pest control
340384R, 331 51, G08B 300
Patent
active
046986197
ABSTRACT:
An alarm message generation and broadcast system having supervision including an alarm message generation circuit for generating an alarm message, an output for receiving the alarm message so that the alarm message can be broadcast in response to an alarm event; and a supervision circuit connected to the alarm message generation circuit and responsive to the alarm message for providing a trouble signal when the alarm message is not properly received by the supervision circuit.
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Caldwell Sr. John W.
Fatahi-Yar Mahmoud
Honeywell Inc.
Lenkszus Donald J.
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