Communications: electrical – Systems – Call station
Patent
1975-05-08
1976-05-25
Caldwell, John W.
Communications: electrical
Systems
Call station
116 4, 116114Y, 62125, G08B 2100, F25B 4900
Patent
active
039597873
ABSTRACT:
An alarm for signalling an improperly high temperature in a refrigerated container such as a freezer includes a thermostat within the container and an alarm unit magnetically mounted on the outside of the container. The alarm unit includes batteries for energizing a lamp and a buzzer within the unit in response to the thermostat. The alarm unit also includes a spring biased flag pivotly mounted thereon which is normally retained in a cocked position by a finger carried by a solenoid. The solenoid is energized by the battery to deploy the flag and thereby provide an enduring indication of alarm after the batteries have died out or the temperature has returned to normal.
REFERENCES:
patent: 2433024 (1947-12-01), Burgess
patent: 2741099 (1956-04-01), Beane
patent: 2923786 (1960-02-01), Jones
patent: 2943308 (1960-06-01), Westphal
patent: 3028586 (1962-04-01), Reba
patent: 3753259 (1973-08-01), Donovan
Messmann Helen
Pfeufer Carl T.
Caldwell John W.
Lawrence Peska Associates Inc.
Slobod Jack D.
Wannisky William M.
LandOfFree
Refrigeration alarm does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Refrigeration alarm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Refrigeration alarm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-909609