Electrical controls for ionization smoke detector

Details Electrical controls for ionization smoke detector Electrical controls for ionization smoke detector

G - Physics

08

B

358/21

G08B 17/10 (2006.01) G01N 27/64 (2006.01) G08B 17/11 (2006.01)

Patent

CA 1169589

ABSTRACT OF THE DISCLOSURE An ionization smoke detector device including a programmable zener diode which is connected to a voltage dividing resistance network at the output of a field effect transistor, the other end of the zener diode being connected to the input of a silicon controlled rectifier device for insuring that adjustment can be made in the triggering potential for the alarm device so that should circumstances change, an operator can make a simple adjustment to take into account the changed circumstances. One of the advantages of this structure is that the operator may test all of the elements of the detector.

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