Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1994-10-21
1996-10-22
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
3403841, 34082569, 34082572, 341176, G08B 108, G08C 1900
Patent
active
055681220
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: 4236147 (1980-11-01), Calvin
patent: 4278967 (1981-07-01), Tanahashi
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: 4970494 (1990-11-01), Keely et al.
patent: 4988980 (1991-01-01), Graham
patent: 5061917 (1991-10-01), Higgs et al.
Fasco Industries Wireless Chime Program, Mar. 15, 1993.
Pamphlet by Dimango Products-Dimango's Wireless Chime Program Jan. 1993.
Pamphlet by Dimango Products-Dimango's Wireless Chime Program Jan. 1993.
Crosland Donnie L.
Dimango Products
LandOfFree
Wireless audible indication system with low power signal process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wireless audible indication system with low power signal process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wireless audible indication system with low power signal process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2361874