Title: Photoelectric detector having an indicator for indicating the operating condition thereof

Abstract: A photoelectric detector for detecting the presence of an object which comprises at least a light ray projecting element, for example, of a luminescent diode and a light ray receiving photoelectric element, for example, of a photo transistor. The two elements are respectively received in bores formed in a housing in such a manner that only the light rays emitted by the projecting elements is received by the receiving element with any lights due to irregular reflection prevented from reaching the receiving element so as to avoid erroneous functioning of the detector.

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Inventors: Fukuyama, Toshifumi (Nagaokakyo, JA)
Asakura, Yasunori (Nagaokakyo, JA)
Onji, Norio (Nagaokakyo, JA)

Application Number: 692148
Filing Date: 1976-06-02
Publication_date: 1977-09-27
Assignee: Omron Tateisi Electronics Co. (JA)
Primary Class(es): 250/222.1 250/239, 250/552
Other Classes:
US Patent Ref:

3444544	May, 1969	Pearson et al.	340/258.
3576277	Apr, 1971	Blackmon	250/221.
3654477	Apr, 1972	Benjamin	250/239.
3737685	Jun, 1973	Sharp	250/221.
3816745	Jun, 1974	Primm et al.	250/221.
3842263	Oct, 1974	Kornrumpf et al.	250/552.
3862415	Jan, 1975	Harnden et al.	250/239.

Other Refs:
Primary Examiner: Nelms, David C.
Assistant Examiner:
Attorney: Craig & Antonelli