Combustion product detector

Details Combustion product detector Combustion product detector

1975-06-30

1978-03-28

Borchelt, Archie R.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250252, 340237S, G01T 118, H01J 3928

Patent

active

040816842

ABSTRACT:
A combustion product detector contains a single ionization chamber having a radioactive source therein. It is provided with means to test the function of the device. The means includes an electrically non-conductive member which may be introduced in the ionization chamber to simulate (in effect) the presence of smoke in the chamber. Housing for the chamber is constructed and mounted to shield the components contained therein. An FET and resistors are closely coupled to a radioactive source holder and to a printed circuit board on which the housing is mounted. A metal coil spring electrically connects the non-conductive test member and the housing to discharge static. The test member may be removed readily to permit inspection and cleaning of the radioactive source surface. The device may be powered from a battery or from AC line current with or without a standby battery to automatically power the device in the event of line current failure and may be provided with a circuit to produce a signal in the event of power failure.

REFERENCES:
patent: 2870341 (1959-01-01), Pennock
patent: 3767917 (1973-10-01), Lampart et al.
patent: 3866195 (1975-02-01), Ried, Jr.

Affiliated with

Also associated with

Rating

Combustion product detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-644582