US3107168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Track maintenance apparatus
Assignee: DONALD J HOGAN
•
Filing: 1959-03-19
•
Granted: 1963-10-15
•
Expires: 1979-03-19
Abstract
No abstract record available.
Inventors
- 👤 Donald J Hogan
- 👤 Warren J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
E; E01; E01B; E01B35/00; E01B2203/00; E01B2203/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A SYSTEM FOR FACILITATING THE REALIGNMENT OF A RAILROAD TRUCK INSTALLATION WHICH COMPRISES A FORWARD TARGET STATION AND A REAR TARGET STATION ADAPTED TO BE POSITIONED ON SAID TRACK INSTALLATION IN SPACED RELATION, EACH OF SAID TARGET STATIONS HAVING A LINEAL TARGET NORMAL TO SAID TRACK INSTALLATION, THE LINEAL TARGETS COOPERATING TO PROVIDE A DATUM PLANE SUBSTANTIALLY PARALLEL TO AN ALIGNED GRADE RAIL; AN OBSERVATION STATION INTERMEDIATE SAID TARGET STATIONS AND CLOSER TO REAR TARGET STATION AND MEANS FOR COUPLING SAID FORWARD TARGET STATION, OBSERVATION STATION AND REAR TARGET STATION A FIXED DISTANCE APART TO EACH OTHER, SAID OBSERVATION STATION INCLUDING A TELESCOPIC SIGHTING DEVICE COMPRISING A FIRST OPTICAL SYSTEM SIGHTING ALONG AN AXIS ON SAID FORWARD TARGET, A SECOND OPTICAL SYSTEM SIGHTING ALONG AN AXIS ON SAID REAR TARGET, THE SIGHTING AXES OF SAID OPTICAL SYSTEMS BEING SUBSTANTIALLY 180* APART IN SUBSTANTIAL ALIGNMENT AND LYING IN AN OPTICAL PLANE, A REFLECTING COINCIDENCE MEANS COOPERATING WITH SAID OPITCAL SYSTEMS TO BRING THE IMAGES OF SAID LINEAL TARGETS TOGETHER AND COINCIDENT TO PROVIDE A TARGET IMAGE, AND AN OPTICAL
Claim 2
Independent Claim
178 words
A SYSTEM FOR FACILITATING THE REALIGNMENT OF A RAILROAD TRUCK INSTALLATION WHICH COMPRISES A FORWARD TARGET STATION AND A REAR TARGET STATION ADAPTED TO BE POSITIONED ON SAID TRACK INSTALLATION IN SPACED RELATION, EACH OF SAID TARGET STATIONS HAVING A LINEAL TARGET NORMAL TO SAID TRACK INSTALLATION, THE LINEAL TARGETS COOPERATING TO PROVIDE A DATUM PLANE SUBSTANTIALLY PARALLEL TO AN ALIGNED GRADE RAIL; AN OBSERVATION STATION INTERMEDIATE SAID TARGET STATIONS AND CLOSER TO REAR TARGET STATION AND MEANS FOR COUPLING SAID FORWARD TARGET STATION, OBSERVATION STATION AND REAR TARGET STATION A FIXED DISTANCE APART TO EACH OTHER, SAID OBSERVATION STATION INCLUDING A TELESCOPIC SIGHTING DEVICE COMPRISING A FIRST OPTICAL SYSTEM SIGHTING ALONG AN AXIS ON SAID FORWARD TARGET, A SECOND OPTICAL SYSTEM SIGHTING ALONG AN AXIS ON SAID REAR TARGET, THE SIGHTING AXES OF SAID OPTICAL SYSTEMS BEING SUBSTANTIALLY 180* APART IN SUBSTANTIAL ALIGNMENT AND LYING IN AN OPTICAL PLANE, A REFLECTING COINCIDENCE MEANS COOPERATING WITH SAID OPITCAL SYSTEMS TO BRING THE IMAGES OF SAID LINEAL TARGETS TOGETHER AND COINCIDENT TO PROVIDE A TARGET IMAGE, AND AN OPTICAL
References Cited (Backward Citations)
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Cited
US2945416A
Cited
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Cited
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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) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |