Alarm for a refrigerator

Details Alarm for a refrigerator Alarm for a refrigerator

1985-12-18

1987-11-17

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

With particular system function

62131, 340585, 200 6162, G08B 2300, G08B 1700

Patent

active

047076844

ABSTRACT:
An alarm is disclosed herein for providing an indication when a certain condition, such as a door ajar condition of a refrigerator, has existed for a predetermined time. The alarm includes a capacitor, means coupled to the capacitor for charging same while the certain condition is in existence, an indicating device and a voltage sensitive switch coupled to the capacitor and to the indicating device for repetitively partially discharging the capacitor through the indicating device when the charge on the capacitor reaches a particular level. A series of alarm pulses are thereby developed by the indicating device once the certain condition has existed for the predetermined time whereby the alarm pulses are separated by equal intervals substantially shorter than the predetermined time. The alarm of the instant invention is simple in construction and inexpensive.

REFERENCES:
patent: 3971017 (1976-07-01), Sutcliffe et al.
patent: 4160972 (1979-07-01), La Mell et al.
patent: 4387578 (1983-06-01), Paddock
patent: 4468542 (1984-08-01), Pounds
patent: 4515999 (1985-05-01), Harper

Affiliated with

Also associated with

Rating

Alarm for a refrigerator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Alarm for a refrigerator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm for a refrigerator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1452413