Multiple station temperature monitor system

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

340585, H04M 1104

Patent

active

042788412

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. In the absence thereof, it causes generation of an alarm signal to be generated.

REFERENCES:
patent: 3811112 (1974-05-01), Hoven et al.
patent: 3848231 (1974-11-01), Wootton
patent: 4028688 (1977-06-01), Goleman

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Multiple station temperature monitor system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple station temperature monitor system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple station temperature monitor system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2165940

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.