Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1989-02-27
1991-06-11
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
200 6163, 232 37, 340539, G08B 1314, H01H 316, B65D 9100
Patent
active
050235958
ABSTRACT:
A remote solar powered radio frequency transmitter assembly and radio receiving and signalling system to indicate delivery of mail. The transmitter means is powered by a rechargeable battery system which is normally recharged by solar cells located on the transmitter means housing. The transmitter means comprises an FM radio transmitter operating in the 49 Mhz band, with a signal strength sufficient for providing an alarm signal to receive at least 4,200 feet distant over unbroken terrain. Upon opening of the mailbox door approximately 30 degrees (30.degree.), a switch initiates a six (6) second operation of the transmitter means. A receiver is provided to detect the radiated signal, and to energize visual and audible signals in response thereto. Ten position DIP switches are provided at both transmitter means and receiver to vary the frequency of operation so as to minimize or eliminate interfering signals. The transmitter means is secured to the mailbox by a single attachment post. A jack plug and flexible cord are provided to connect the transmitter means and the switch. The switch is provided with a flat backing plate having a double sided adhesive for ease of installation. The audible alarm at the receiver comprises a digitally generated musical tune. The musical tune automatically stops after about 20 seconds, unless the receiver is reset sooner. Reset of the receiver turns off both the musical tune audible alarm and the flashing light visual alarm.
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"Operating Instructions for Your New Postronic Electronic Mail Detector," QuesTech, A Division of Creative Technologies, Inc., Bothell, WA 98041-1023; 1987.
Mullen Jr. Thomas J.
Swann III Glen R.
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