Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1989-12-21
1991-04-02
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340506, 340531, 455 67, 455 91, 455134, G08B 108
Patent
active
050049992
ABSTRACT:
A wireless alarm system utilizes pulsed FM transmissions to increase the effective range of the system while meeting FCC requirements for radiated signal strength. The effective range of the system is increased by shortening the duty cycle and increasing the signal strength during the on-time. This results in a low average RF signal strength, however, an increased transmission distance is achieved.
REFERENCES:
patent: 3848231 (1974-11-01), Wootton
patent: 4095211 (1978-06-01), Shaughnessy
patent: 4462022 (1984-07-01), Stolarczyk
patent: 4523184 (1985-06-01), Abel
patent: 4603325 (1986-07-01), Marino et al.
Glasener Ted W.
Hartmann Jon P.
Crosland Donnie L.
Honeywell Inc.
Lenkszus Donald J.
Leonard Robert B.
MacKinnon Ian D.
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