Jack Regennitter
General Contractor in Salt Lake City, UT
License number
Utah 233139-5501
Issued Date
Jan 1, 1911
Expiration Date
Jan 1, 1911
Category
Contractor
Type
Contractor With LRF
Address
Address
Salt Lake City, UT
Professional information
Multiple Station Temperature Monitor System
US Patent:
4278841, Jul 14, 1981
Filed:
Oct 22, 1979
Appl. No.:
6/087254
Inventors:
Jack Regennitter - Salt Lake City UT
Ronald C. Ward - Salt Lake City UT
Ronald C. Ward - Salt Lake City UT
International Classification:
H04M 1104
US Classification:
179 5R
Abstract:
A plurality of detector units are positioned to sense the refrigerated air temperature of a refrigerated air supply to a retail frozen food case or counter. The detector units are battery powered and supply a modulated radio frequency output reflecting the existence of a temperature condition integrated over time together with identification codes identifying a particular detector unit. A receiver unit receives the transmitted radio frequency signal, demodulates and decodes the signal, and supplies an output to an alarm unit. The alarm unit develops the alarm signal and supplies it to an indicator, as well as to an external alarm circuit which is a phone dialer which automatically dials a phone number in an external telephone system. In addition, the detector unit periodically generates an operational check signal which is also transmitted to and decoded by the receiver unit and supplied to the alarm unit. The alarm unit indicates the existence of the operational check signal.