Patent US3269017A successfully refreshed from Google Patents.
US3269017A
Expired / Lapsed
US
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Peaking shadow board
Assignee: Individual
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Filing: 1964-06-05
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Granted: 1966-08-30
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Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Stewart John Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:11
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16; E01B27/17; B; B61; B61K; B61K9/00; B61K9/08; B61L; B61L1/00; B61L1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A SHADOW DEVICE ADAPTED FOR CONTACT WITH THE RAILS OF A RAILROAD TRACK FOR USE IN A RAILROAD SURVEYING SYSTEM BETWEEN A HIGH FREQUENCY BEAM TRANSMITTER AND A HIGH FREQUENCY BEAM RECEIVER, WHICH SHADOW DEVICE COMPRISES A MOUNTING MEMBER INCLUDING A BOARD-LIKE EXTENSION ELEMENT ADAPTED FOR LOCATION SUBSTANTIALLY ABOVE A RAIL OF THE TRACK, A BEAM INTERFERENCE MEMBER HINGEDLY MOUNTED BY A PIANO HINGE TO THE EXTENSION ELEMENT FOR VERTICAL ADJUSTMENT RELATIVE THERETO AND MEANS FOR MOVING THE BEAM INTERFERENCE MEMBER IN MEASURED INCREMENTS WHEREBY TO ALTER THE HEIGHT OF THE BEAM INTERFERENCE MEMBER THE RAILS.
Claim 2
Dependent Claim
96 words
A SHADOW DEVICE ADAPTED FOR CONTACT WITH THE RAILS OF A RAILROAD TRACK FOR USE IN A RAILROAD SURVEYING SYSTEM BETWEEN A HIGH FREQUENCY BEAM TRANSMITTER AND A HIGH FREQUENCY BEAM RECEIVER, WHICH SHADOW DEVICE COMPRISES A MOUNTING MEMBER INCLUDING A BOARD-LIKE EXTENSION ELEMENT ADAPTED FOR LOCATION SUBSTANTIALLY ABOVE A RAIL OF THE TRACK, A BEAM INTERFERENCE MEMBER HINGEDLY MOUNTED BY A PIANO HINGE TO THE EXTENSION ELEMENT FOR VERTICAL ADJUSTMENT RELATIVE THERETO AND MEANS FOR MOVING THE BEAM INTERFERENCE MEMBER IN MEASURED INCREMENTS WHEREBY TO ALTER THE HEIGHT OF THE BEAM INTERFERENCE MEMBER THE RAILS.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |