Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-06-05
2007-06-05
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S221000, C250S239000, C327S514000, C340S555000
Reexamination Certificate
active
11236862
ABSTRACT:
A multi-beam photoelectric sensor is disclosed which can be fabricated by selecting the length of a light projection/light-receiving columnar member and the number and pitches of optical axes in accordance with the width of a hazardous area of an object or the diameter of the minimum object to be detected. A projector string or a photo-detector string includes an optical module string having an alignment of a plurality of optical modules with an optical system for one optical axis, a light projection circuit for one optical axis and a plurality of flip-flops corresponding to one stage of a shift register, integrated with each other, and a flat cable. The flip-flops in the adjacent optical modules are connected in cascade by the adjacent module conduction wires thereby to make up a shift register. The optical modules making the optical module string are sequentially activated by the data sequentially sent by the shift register.
REFERENCES:
patent: 6504140 (2003-01-01), Ueno et al.
patent: 04-213915 (1992-08-01), None
patent: 08-148981 (1996-06-01), None
patent: 2002-124170 (2002-04-01), None
Akagi Tetsuya
Ito Shunsuke
Miyake Yasushi
Sato Toshinori
Shimokawa Satoru
Epps Georgia
Lee Patrick J.
Omron Corporation
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