US3273145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Train slack measuring apparatus
Assignee: Individual
•
Filing: 1965-02-16
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Granted: 1966-09-13
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Expires: 1985-02-16
Abstract
No abstract record available.
Inventors
- 👤 Ivan L Joy
- 👤 James W Luehring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
B; B61; B61L; B61L15/00; B61L15/0018; B61L15/0027; B61L15/0054; B61L15/0072; G; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
APPARATUS FOR MEASURING POSITION VARIATIONS BETWEEN FRONT AND REAR ENDS OF A TRAIN, AND COMPRISING MEANS AT ONE END OF SAID TRAIN FOR GENERATING A FIXED FREQUENCY REFERENCE SIGNAL, MEANS AT SAID ONE END FOR TRANSMITTING A RADIATED CARRIER SIGNAL HAVING AN FM MODULATION COMPONENT DERIVED FROM SAID REFERENCE SIGNAL, MEANS AT THE OTHER END OF SAID TRAIN FOR RECEIVING AND DEMODULATING SAID CARRIER SIGNAL TO PROVIDE OUTPUT CONSISTING OF SAID REFERENCE SIGNAL, MEANS AT THE REAR END FOR TRANSMITTING A RADIATED CONTINUOUS WAVE SIGNAL DERIVED FROM AND CONSISTING OF A CERTAIN FREQUENCY MULTIPLE OF THE REFERENCE SIGNAL THEREAT, MEANS AT THE FRONT END FOR RECEIVING SAID CONTINUOUS WAVE SIGNAL AT A DOPPLER SHIFTED FREQUENCY, AND MEANS AT THE FRONT END CONNECTED TO RESPOND TO ANY FREQUENCY DIFFERENCE BETWEEN SAID CERTAIN FREQUENCY MULTIPLE OF THE REFERENCE SIGNAL AT THE FRONT END AND THE RECEIVED DOPPLER SHIFTED FREQUENCY FOR PRODUCING A SIGNAL REPRESENTATIVE OF POSITION VARIATIONS BETWEEN SAID FRONT AND REAR ENDS OF THE TRAIN.
Claim 2
Dependent Claim
164 words
APPARATUS FOR MEASURING POSITION VARIATIONS BETWEEN FRONT AND REAR ENDS OF A TRAIN, AND COMPRISING MEANS AT ONE END OF SAID TRAIN FOR GENERATING A FIXED FREQUENCY REFERENCE SIGNAL, MEANS AT SAID ONE END FOR TRANSMITTING A RADIATED CARRIER SIGNAL HAVING AN FM MODULATION COMPONENT DERIVED FROM SAID REFERENCE SIGNAL, MEANS AT THE OTHER END OF SAID TRAIN FOR RECEIVING AND DEMODULATING SAID CARRIER SIGNAL TO PROVIDE OUTPUT CONSISTING OF SAID REFERENCE SIGNAL, MEANS AT THE REAR END FOR TRANSMITTING A RADIATED CONTINUOUS WAVE SIGNAL DERIVED FROM AND CONSISTING OF A CERTAIN FREQUENCY MULTIPLE OF THE REFERENCE SIGNAL THEREAT, MEANS AT THE FRONT END FOR RECEIVING SAID CONTINUOUS WAVE SIGNAL AT A DOPPLER SHIFTED FREQUENCY, AND MEANS AT THE FRONT END CONNECTED TO RESPOND TO ANY FREQUENCY DIFFERENCE BETWEEN SAID CERTAIN FREQUENCY MULTIPLE OF THE REFERENCE SIGNAL AT THE FRONT END AND THE RECEIVED DOPPLER SHIFTED FREQUENCY FOR PRODUCING A SIGNAL REPRESENTATIVE OF POSITION VARIATIONS BETWEEN SAID FRONT AND REAR ENDS OF THE TRAIN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |