Smoke detector with individually stored range of acceptable sens

Details Smoke detector with individually stored range of acceptable sens Smoke detector with individually stored range of acceptable sens

1993-07-12

1996-09-03

Groody, James J.

Communications: electrical

Condition responsive indicating system

With particular system function

340630, G08B 2900, G08B 1710

Patent

active

055527655

ABSTRACT:
A smoke detector is provided with testing apparatus for determining if its sensitivity is within a predetermined acceptable range. The testing apparatus stores in the detector a range representing acceptable sensitivities. When a test is initiated the resulting test output is compared to the sensitivity range, or its representation, and a warning signal is provided when the output is not acceptable. According to one feature, the stored representations of the acceptable range include a maximum acceptable value and a minimum acceptable value, and the warning signal indicates when the output is above the maximum or below the minimum. According to other features, the output signal is periodic at one frequency when above the maximum and at another frequency when below the minimum. The test is initiated by a magnetic reed switch and the results are immediately apparent. Each smoke detector is calibrated on an individual basis that accounts for its particular electrical response, and the calibration information is retained in the detector wherever it goes after installation.

REFERENCES:
patent: 4302753 (1981-11-01), Conforti
patent: 4317113 (1982-02-01), Honma
patent: 4559453 (1985-12-01), Muggli et al.
patent: 4595914 (1986-06-01), Siegel
patent: 4977527 (1990-12-01), Shaw et al.
patent: 5243330 (1993-09-01), Thuillard
patent: 5281810 (1994-01-01), Fooks et al.

Affiliated with

Also associated with

Rating

Smoke detector with individually stored range of acceptable sens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Smoke detector with individually stored range of acceptable sens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Smoke detector with individually stored range of acceptable sens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1953475