Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-07-29
1997-10-21
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
340635, 340539, 455343, G08B 2100
Patent
active
056801122
ABSTRACT:
A wireless audible indication system comprising a transmitter and a receiver. An embodiment of the transmitter includes a modulator formed by a microprocessor and a radio frequency oscillator. The modulation format employed is selectable by the user using severable jumper wires. A battery status circuit is included which verifies the status of a battery within the transmitter. The modulator transmits a low battery bit to the receiver in order to alert the user of a weak transmitter battery. An embodiment of the receiver includes a superregenerative detector which produces an intermediate signal upon receiving a radio frequency signal. A signal processing circuit, which includes an active peak detector stage and a discrete comparator stage, is used to process the intermediate signal. A microprocessor controls a sound generator circuit in response to the processed intermediate signal. The microprocessor, which normally operates in an inactive mode, is awaken using a wake-up circuit upon reception of the radio frequency signal. A battery status circuit is included to verify the status of a battery within the receiver. Embodiments of the transmitter and receiver employ a pulse position modulation scheme.
REFERENCES:
patent: 3833895 (1974-09-01), Fecteau
patent: 4064507 (1977-12-01), Schmitz
patent: 4191948 (1980-03-01), Stockdale
patent: 4278967 (1981-07-01), Tanahashi
patent: 4356481 (1982-10-01), Kuki
patent: 4367458 (1983-01-01), Hackett
patent: 4520349 (1985-05-01), Varano
patent: 4523184 (1985-06-01), Abel
patent: 4523193 (1985-06-01), Levinson et al.
patent: 4560978 (1985-12-01), Lemelson
patent: 4581606 (1986-04-01), Mallory
patent: 4641127 (1987-02-01), Hogan et al.
patent: 4672365 (1987-06-01), Gehman et al.
patent: 4777474 (1988-10-01), Clayton
patent: 4821027 (1989-04-01), Mallory et al.
patent: 4890108 (1989-12-01), Drori et al.
patent: 4970494 (1990-11-01), Keely et al.
patent: 4988980 (1991-01-01), Graham
patent: 5061917 (1991-10-01), Higgs et al.
patent: 5095537 (1992-03-01), Coiller et al.
patent: 5130633 (1992-07-01), Maruichi
patent: 5239694 (1993-08-01), Toyoshima
patent: 5325041 (1994-06-01), Briggs
patent: 5404585 (1995-04-01), Vimpari et al.
patent: 5506571 (1996-04-01), Hille et al.
Fasco Industries Wireless Chime Program, Mar. 15, 1994.
Pamphlet by Dimango Products --Diamango's 1993 Wireless Chime Program.
Graf, "Encyclopedia of Electronic Circuits Volume I", 1985, pp. 120, 121, 123,124.
Dimango Products Corporation
Mannava Ashok
Mullen Thomas
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