Devices for detecting the presence of an object in a monitored r

Details Devices for detecting the presence of an object in a monitored r Devices for detecting the presence of an object in a monitored r

1975-10-20

1977-08-23

Borchelt, Archie R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250560, 350193, 350107, 250571, H01J 314, H01J 516, H01J 3912

Patent

active

040442500

ABSTRACT:
A device for detecting the presence of an object in a region to be monitored of the kind comprising light emitting means, electronic light receiving means, and an optical system having means for focussing the light emitted by the light emitting means and means for focussing any light reflected by an object in the monitored region and passing to the light receiving means. The respective focussing means, which are preferably incorporated in a common block moulded from a light permeable material such as glass or plastics material, are so arranged relative to one another that the path of the light rays from the light emitting means and the path of any light rays passed to the light receiving means meet at an angle to one another in the region to be monitored.

REFERENCES:
patent: 2866279 (1958-12-01), Surber
patent: 2923827 (1960-02-01), Dessauer et al.
patent: 2973686 (1961-03-01), Dreyfus et al.
patent: 3421013 (1969-01-01), Angelari
patent: 3509353 (1970-04-01), Sundblad et al.
patent: 3519833 (1970-07-01), Arch et al.
patent: 3553470 (1971-01-01), Dench
patent: 3639770 (1972-01-01), Zizelmann
patent: 3667846 (1972-06-01), Nater et al.
patent: 3880528 (1975-04-01), Petersen et al.

Affiliated with

Also associated with

Rating

Devices for detecting the presence of an object in a monitored r does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Devices for detecting the presence of an object in a monitored r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Devices for detecting the presence of an object in a monitored r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2317213