US4381446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric switch
Assignee: Omron Corp
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Filing: 1981-06-29
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Granted: 1983-04-26
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Expires: 2001-06-29
Abstract
Abstract There is provided a photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of the pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate the light reception signal according to the output pulse of the pulse oscillator and an integration circuit for integrating outputs of the gate circuit, and a control circuit for varying the pulse frequency by controlling the pulse oscillator on generation of a light reception signal from the light reception element.
Inventors
- 👤 Toshifumi Fukuyama
- 👤 Norio Onji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:29
CPC Classifications
G; G01; G01V; G01V8/00; G01V8/10; G01V8/12; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; H; H03; H03K; H03K17/00; H03K17/94; H03K17/941
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and an integration circuit for integrating outputs of said gate circuit, and a control circuit for varying the pulse frequency by controlling said pulse oscillator on generation of a light reception signal from said light reception element.
Claim 2
Dependent Claim
109 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and an integration circuit for integrating outputs of said gate circuit, and a control circuit for varying the pulse frequency by controlling said pulse oscillator on generation of a light reception signal from said light reception element.
Claim 3
Dependent Claim
116 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for delaying a next pulse by stopping temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception element during a period where there is no pulse output from said pulse oscillator.
Claim 4
Dependent Claim
116 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for delaying a next pulse by stopping temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception element during a period where there is no pulse output from said pulse oscillator.
Claim 5
Dependent Claim
116 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for delaying a next pulse by stopping temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception signal during a period immediately before generation of a pulse from said pulse oscillator.
Claim 6
Dependent Claim
116 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for delaying a next pulse by stopping temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception signal during a period immediately before generation of a pulse from said pulse oscillator.
Claim 7
Dependent Claim
121 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse socillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for advancing the timing of generation of a next pulse by quickening temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception element during a period immediately following generation of a pulse from said pulse oscillator.
Claim 8
Dependent Claim
121 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse socillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for advancing the timing of generation of a next pulse by quickening temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception element during a period immediately following generation of a pulse from said pulse oscillator.
Claim 9
Dependent Claim
94 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for shortening the pulse frequency of said pulse generator in response to the output of said gate circuit.
Claim 10
Dependent Claim
94 words
A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for shortening the pulse frequency of said pulse generator in response to the output of said gate circuit.
References Cited (Backward Citations)
US4207466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |