Self-contained fork sensor having a wide effective beam

Details Self-contained fork sensor having a wide effective beam Self-contained fork sensor having a wide effective beam

2008-05-06

2008-05-06

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S222100

Reexamination Certificate

active

07368704

ABSTRACT:
A system and method for providing a fork sensor including an emitter, a receiver, and at least one lens assembly wherein the width of the effective beam does not depend upon the size of the emitter or the receiver. One aspect of the present invention is a method for detecting or counting the number of objects interrupting the effective beam of the fork sensor. Another aspect of the present invention is a method for measuring the dimensions of objects using the fork sensor.

REFERENCES:
patent: 4253020 (1981-02-01), Michel et al.
patent: 4649270 (1987-03-01), Goldenberg
patent: 5180910 (1993-01-01), Spratte et al.
patent: 5187361 (1993-02-01), Ishii
patent: 5793037 (1998-08-01), Guillot et al.
patent: 6903327 (2005-06-01), Appleyard
patent: 7034284 (2006-04-01), Torii
patent: 7176444 (2007-02-01), Bergbach

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