Patent US3678281A successfully refreshed from Google Patents.
US3678281A
Expired / Lapsed
US
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Photoelectric sensing device
Assignee: Erwin Sick GmbH Optik Elektronik
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Filing: 1970-03-31
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Granted: 1972-07-18
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Expires: 1990-03-31
Abstract
Abstract In a photoelectric sensing device a first lens is affixed to a machine at a distance equal to its focal length from an object under observation. A detector unit, including a second lens and a photoelectric detector in the focal point thereof is resiliently mounted on a machine, the second lens being aligned with the first lens. Thereby the object is imaged on the detector regardless of vibrations of the machine and, on the other hand, the detector unit is protected from such vibrations.
Inventors
- 👤 Franz Gleixner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:14
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/127; B23Q35/128; B23Q15/00; B23Q35/24; B23Q35/38; B23Q35/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A photoelectronic sensing device adapted to be affixed to a machine comprising: a member susceptible to vibrations and an imaging optical system for mutually imaging the said member and an object to be observed on each other, wherein the said optical system comprises a first imaging optical element having an optical axis and a second imaging optical element having an optical axis, said first optical element being mounted in fixed spatial relation to said machine at a distance from the location of said object equal to the focal length of said first optical element, and wherein part of the sensing device including said second optical element of the imaging optical system and said member are resiliently suspended with respect to said machine, the optical axes of said first and second optical elements being at least parallel to each other and the said member being held in the focal point of said second optical element in fixed positional relation thereto.
Claim 2
Dependent Claim
159 words
A photoelectronic sensing device adapted to be affixed to a machine comprising: a member susceptible to vibrations and an imaging optical system for mutually imaging the said member and an object to be observed on each other, wherein the said optical system comprises a first imaging optical element having an optical axis and a second imaging optical element having an optical axis, said first optical element being mounted in fixed spatial relation to said machine at a distance from the location of said object equal to the focal length of said first optical element, and wherein part of the sensing device including said second optical element of the imaging optical system and said member are resiliently suspended with respect to said machine, the optical axes of said first and second optical elements being at least parallel to each other and the said member being held in the focal point of said second optical element in fixed positional relation thereto.
Claim 3
Dependent Claim
19 words
A photoelectronic sensing device as claimed in claim 1 wherein said member susceptible to vibrations is a photoelectronic detector.
Claim 4
Dependent Claim
23 words
A photoelectronic sensing device as claimed in claim 2 wherein said second optical element has a larger aperture than said first optical element.
Claim 5
Dependent Claim
99 words
In an apparatus for a machine subject to vibration and employed in conjunction with an object spaced from the machine wherein the apparatus comprises a photoelectronic element and light transmission means for conducting light along a path extending between the element and the object, the improvement comprising: a holder resiliently mounted on said machine, said element being attached to said holder; and said means including a first lens fixedly connected to said machine and positioned with its focal point on said object, and a second lens attached to said holder and positioned with its focal point on said element.
Claim 6
Dependent Claim
99 words
In an apparatus for a machine subject to vibration and employed in conjunction with an object spaced from the machine wherein the apparatus comprises a photoelectronic element and light transmission means for conducting light along a path extending between the element and the object, the improvement comprising: a holder resiliently mounted on said machine, said element being attached to said holder; and said means including a first lens fixedly connected to said machine and positioned with its focal point on said object, and a second lens attached to said holder and positioned with its focal point on said element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |