Light barrier apparatus

Details Light barrier apparatus Light barrier apparatus

1980-03-03

1982-10-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Housings

250221, G01D 2104

Patent

active

043541062

ABSTRACT:
Light barrier apparatus generally features a light transmitter for projecting light across a region to be monitored to a light receiver. The light transmitter and receiver units can either be separate or can be combined in a single housing and used in conjunction with a retro-reflector for returning light from the sender to the receiver.
In any of these arrangements the light transmitter and/or sender units incorporate photoelectric converter components 11, 12 and optical projection components 13, 14 together with electronic processing elements which enable interruption of the light barrier to be detected. The present arrangement features a housing 17 including at least one sealed chamber 15, 15', 15" containing solely the optical and photoelectric converter elements. These chambers are thus sealed against the ingress of contamination and moisture. The remaining elements of the electronic processing circuit are housed separately in a further chamber 16. The housing together with the fixed walls 18, 18', 18" of the sealed chambers 15, 15', 15" is usefully injection molded in one piece and preferably together with sighting aids 22.

REFERENCES:
patent: 3412257 (1968-11-01), Miller et al.
patent: 4012635 (1977-03-01), Walter et al.
patent: 4029957 (1977-06-01), Betz et al.

Affiliated with

Also associated with

Rating

Light barrier apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-224982