US3205478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highway crossing warning lamp
Assignee: SPX Technologies Inc
•
Filing: 1961-12-11
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Granted: 1965-09-07
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Marcian A Scheg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
B; B61; B61L; B61L29/00; B61L29/24; F; F21; F21W; F21W2111/00; F21W2111/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A WARNING LAMP UNIT ADAPTED FOR PROVIDING OPTICAL WARNING OF THE PRESENCE OF RAILWEAY TRAINS AT A HIGHWAY CROSSING COMPRISING: (A) A LIGHT SOURCE ENERGIZED IN RESPONSE TO THE PRESENCE OF A RAILWAY TRAIN AT SAID HIGHWAY CROSSING, (B) A MOVABLE REFLECTOR EFFECTIVE TO RECEIVE AND REFLECT THE LIGHT FROM SAID ENERGIZED LIGHT SOURCE AS A WARNING LIGHT BEAM TOWARD SAID HIGHWAY, (C) DRIVING MEANS COMPRISING ELECTRIC DRIVING MOTOR CIRCUITRY ADAPTED TO BE STARTED WHEN ENERGIZED IN RESPONSE TO THE PRESENCE OF SAID RAILWAY TRAIN AND OPERABLY CONNECTED TO ROTATE SAID REFLECTOR, WHEREBY SAID WARNING LIGHT BEAM IS RECURRENTLY REFLECTED TOWARDS SAID HIGHWAY AS A DISTINCTIVE WARNING THAT SAID RAILWAY TRAIN IS PRESENT, AND (D) CONTROL MEANS FOR STOPPING THE ROTATION OF SAID REFLECTOR WHEN A RAILWAY TRAIN CLEARS SAID HIGHWAY CROSSING, SAID CONTROL MEANS COMPRISING A CONTACT
Claim 2
Dependent Claim
138 words
A WARNING LAMP UNIT ADAPTED FOR PROVIDING OPTICAL WARNING OF THE PRESENCE OF RAILWEAY TRAINS AT A HIGHWAY CROSSING COMPRISING: (A) A LIGHT SOURCE ENERGIZED IN RESPONSE TO THE PRESENCE OF A RAILWAY TRAIN AT SAID HIGHWAY CROSSING, (B) A MOVABLE REFLECTOR EFFECTIVE TO RECEIVE AND REFLECT THE LIGHT FROM SAID ENERGIZED LIGHT SOURCE AS A WARNING LIGHT BEAM TOWARD SAID HIGHWAY, (C) DRIVING MEANS COMPRISING ELECTRIC DRIVING MOTOR CIRCUITRY ADAPTED TO BE STARTED WHEN ENERGIZED IN RESPONSE TO THE PRESENCE OF SAID RAILWAY TRAIN AND OPERABLY CONNECTED TO ROTATE SAID REFLECTOR, WHEREBY SAID WARNING LIGHT BEAM IS RECURRENTLY REFLECTED TOWARDS SAID HIGHWAY AS A DISTINCTIVE WARNING THAT SAID RAILWAY TRAIN IS PRESENT, AND (D) CONTROL MEANS FOR STOPPING THE ROTATION OF SAID REFLECTOR WHEN A RAILWAY TRAIN CLEARS SAID HIGHWAY CROSSING, SAID CONTROL MEANS COMPRISING A CONTACT
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |