US3835546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring device for checking and/or correcting the transverse slope of railway tracks
Assignee: Canron Inc
•
Filing: 1972-11-06
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Granted: 1974-09-17
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Expires: 1992-11-06
Abstract
Abstract An improved measuring device for checking and/or correcting the local transverse slope of railway tracks is disclosed. The device includes a rigid chassis having sensors positioned to rest on two lines of rails in a transverse vertical plane to the track supports, and a clinometer of the electrolytic spirit level type able to supply an electrical signal proportional to its slope in said plane. The clinometer is mounted to rotate about an axis perpendicular to the plane and is continually returned to the horizontal position by a motor which is supplied with an electrical signal from said clinometer. The motor acts simultaneously on the drive of a movable member of a transducer to supply an electrical signal proportional to the degree of rotation of the clinometer relative to the rigid chassis. This degree of rotation corresponds to the local transverse slope of the track to be measured.
Inventors
- 👤 A Jaquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:35
CPC Classifications
E; E01; E01B; E01B35/00; G; G01; G01C; G01C9/00; G01C9/18; E01B2203/00; E01B2203/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A measuring device for checking or correcting the local transverse slope of railway tracks, comprising: a rigid chassis, sensors connected to said chassis and positioned to rest on two lines of rails in a transverse vertical plane to the railway tracks; a clinometer of the electrolytic spirit level type including means to supply an electrical signal proportional to its slope in said plane and supported by said chassis, said clinometer being mounted to rotate about an axis perpendicular to said plane; a motor operatively connected to said clinometer for continually returning said clinometer to a horizontal position by means of the electrical signal generated by said clinometer and applied to said motor; and a transducer having a movable member coupled to said motor for generating an electrical signal proportional to the degree of rotation of the clinometer relative to the rigid chassis, said degree of rotation corresponding to the local transverse slope of the track to be measured.
Claim 2
Dependent Claim
158 words
A measuring device for checking or correcting the local transverse slope of railway tracks, comprising: a rigid chassis, sensors connected to said chassis and positioned to rest on two lines of rails in a transverse vertical plane to the railway tracks; a clinometer of the electrolytic spirit level type including means to supply an electrical signal proportional to its slope in said plane and supported by said chassis, said clinometer being mounted to rotate about an axis perpendicular to said plane; a motor operatively connected to said clinometer for continually returning said clinometer to a horizontal position by means of the electrical signal generated by said clinometer and applied to said motor; and a transducer having a movable member coupled to said motor for generating an electrical signal proportional to the degree of rotation of the clinometer relative to the rigid chassis, said degree of rotation corresponding to the local transverse slope of the track to be measured.
Claim 3
Dependent Claim
31 words
A device according to claim 1, further comprising a speed reducer coupled to said motor and to said clinometer for obtaining an adequate definition of the rotational measurements on said transducer.
Claim 4
Dependent Claim
46 words
A device according to claim 2 wherein said means to supply an electrical signal proportional to the slope includes an active filter operatively connected thereto and having appropriate characteristics to insure that the motor only reacts to normal variation rates in the slope of the clinometer.
Claim 5
Dependent Claim
117 words
A device according to claim 3 wherein said clinometer comprises an electrolytic spirit level positioned for rotation about said axis, an oscillator coupled to the ends of said level for producing a continual discrete square wave output applied to said level, a phase detector coupled centrally of said level for obtaining information from said level indicative of the slope thereof, an active filter coupled to said phase detector for obtaining a continuous electrical signal indicative of the slope and direction of the spirit level, and amplifier means coupled to said filter and including adjusting means for zeroing the output of said amplifier means when the spirit level is horizontal, said amplifier means being coupled to said motor.
References Cited (Backward Citations)
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |