US3100847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light curtain apparatus for photosensitive detector
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1961-01-18
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Granted: 1963-08-13
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Expires: 1981-01-18
Abstract
No abstract record available.
Inventors
- 👤 Hacht Gerhard Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:41
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
AN ARRANGEMENT FOR PRODUCING A PROTECTIVE LIGHT CURTAIN, THE COMBINATION COMPRISING: A FIRST CASING HAVING A STRAIGHT SLOT; A CYLINDRICAL LENS IN FRONT OF SAID SLOT; A SECOND CYLINDRICAL CASING INSIDE SAID FIRST CASING AND HAVING AT LEAST ONE HELICAL SHAPED SLOT; AN ELONGATED LIGHT SOURCE AXIALLY AND CENTRALLY DISPOSED IN SAID SECOND CASING AND ALIGNED WITH SAID CYLINDER LENS AND SAID STRAIGHT SLOT AND DEFINING THEREWITH THE PLANE OF EXTENSION OF THE LIGHT CURTAIN; MEANS FOR ROTATING SAID SECOND CASING; A THIRD CASING DISPOSED SPATIALLY APART FROM SAID FIRST CASING AND HAVING A STRAIGHT SLOT ALIGNED WITH SAID CURTAIN; A PHOTOELECTRIC RECEIVER IN SAID THIRD CASING; AN OPTICAL SYSTEM IN SAID THIRD CASING OPTICALLY ALIGNED WITH THE SLOT THEREOF AND INCLUDING A CYLINDRICAL LENS AND A COLLIMATOR MIRROR CURVED IN TWO PLANES AND REFLECTING ANY LIGHT BEAM ENTERING SAID THIRD CASING FROM SAID LIGHT SOURCE ONTO SAID PHOTOELECTRIC RECEIVER.
Claim 2
Dependent Claim
150 words
AN ARRANGEMENT FOR PRODUCING A PROTECTIVE LIGHT CURTAIN, THE COMBINATION COMPRISING: A FIRST CASING HAVING A STRAIGHT SLOT; A CYLINDRICAL LENS IN FRONT OF SAID SLOT; A SECOND CYLINDRICAL CASING INSIDE SAID FIRST CASING AND HAVING AT LEAST ONE HELICAL SHAPED SLOT; AN ELONGATED LIGHT SOURCE AXIALLY AND CENTRALLY DISPOSED IN SAID SECOND CASING AND ALIGNED WITH SAID CYLINDER LENS AND SAID STRAIGHT SLOT AND DEFINING THEREWITH THE PLANE OF EXTENSION OF THE LIGHT CURTAIN; MEANS FOR ROTATING SAID SECOND CASING; A THIRD CASING DISPOSED SPATIALLY APART FROM SAID FIRST CASING AND HAVING A STRAIGHT SLOT ALIGNED WITH SAID CURTAIN; A PHOTOELECTRIC RECEIVER IN SAID THIRD CASING; AN OPTICAL SYSTEM IN SAID THIRD CASING OPTICALLY ALIGNED WITH THE SLOT THEREOF AND INCLUDING A CYLINDRICAL LENS AND A COLLIMATOR MIRROR CURVED IN TWO PLANES AND REFLECTING ANY LIGHT BEAM ENTERING SAID THIRD CASING FROM SAID LIGHT SOURCE ONTO SAID PHOTOELECTRIC RECEIVER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |