Ionization type smoke sensing device

Details Ionization type smoke sensing device Ionization type smoke sensing device

1975-04-28

1977-05-10

Yusko, Donald J.

Communications: electrical

Systems

Call station

250381, G08B 1710

Patent

active

040231526

ABSTRACT:
A smoke sensing device of the type having a single ionization chamber wherein stability and reliability are increased by driving the ionization chamber from a square wave oscillator, and utilizing an A.C. amplifier responsive to the ionization current within the chamber. The A.C. amplifier serves to amplify the current through the ionization chamber and couple the amplified current to a rectifier and detector adapted to respond to decreases in current, such as caused by smoke particles within the ionization chamber, to activate an alarm device.

REFERENCES:
patent: 2761976 (1956-09-01), Obermaier et al.
patent: 3047847 (1962-07-01), Marsh et al.
patent: 3295121 (1966-12-01), Meyer
patent: 3603949 (1971-09-01), Walthard
patent: 3676680 (1972-07-01), Scheidweiler et al.
patent: 3714641 (1973-01-01), Scheidweiler
patent: 3728703 (1973-04-01), Burnett

Affiliated with

Also associated with

Rating

Ionization type smoke sensing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ionization type smoke sensing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionization type smoke sensing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1986734