Margin test switch for photoelectric intruder detection devices

Details Margin test switch for photoelectric intruder detection devices Margin test switch for photoelectric intruder detection devices

1975-03-14

1976-08-10

Habecker, Thomas B.

Communications: electrical

Systems

Call station

340258D, G08B 1300

Patent

active

039744884

ABSTRACT:
A switch incorporated in a photoelectric intruder detection system provides a simple means for testing the system for a predetermined margin of safety from false alarm producing sources. Upon actuation of the switch, the sensitivity of the system is reduced by a predetermined factor, such factor representing a predesired margin of safety from false alarms. During installation of the system, the switch is actuated to reduce system sensitivity. Upon positioning the system components to provide a desired catch capability, the switch is deactuated, thereby increasing the system sensitivity to a level which provides a margin of safety equal to or greater than the amount of gain reduction effected by the switch.

REFERENCES:
patent: 3838408 (1974-09-01), McMaster

Affiliated with

Also associated with

Rating

Margin test switch for photoelectric intruder detection devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Margin test switch for photoelectric intruder detection devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Margin test switch for photoelectric intruder detection devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1745123