US4092857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensiometer
Assignee: LAWSON HEMPHILL Inc
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Filing: 1977-07-05
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Granted: 1978-06-06
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Expires: 1997-07-05
Abstract
Abstract A damping mechanism for a rotating-head tensiometer, of the kind with a handle and a measuring head rotatably attached thereto, having an escapement pivoted about its own center of mass, and engaged with a toothed surface, such that, as the measuring head rotates, the escapement oscillates and the desired damping of the measuring head is provided by the inertial resistance of the escapement to oscillation.
Inventors
- 👤 John B. Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:15
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/04; G01L5/06; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1502
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A rotating head tensiometer adapted for measurement of the tension on a running yarn, which comprises: a handle, a measuring head rotatably mounted on said handle and provided with walls surrounding an enclosure facing said handle; a beam carried in said enclosure for rotation with said measuring head relative to said handle, a pair of rollers rotatably mounted on said beam above said walls for rotation of said beam an amount proportional to yarn tension, a toothed wheel carried by said beam therearound for rotation therewith, and a plurality of escapements mounted therearound for oscillation about axes parallel to the axis of relative rotation of said handle and said measuring head, each of the escapement axes being coincident with the center of inertia of the respective escapement, each of said escapements being heavy, elongated, and having a pair of protuberances engaging the toothed surface of said toothed wheel, whereby moment of inertia is high even at low rates of head rotation and no weight bias of the heavy escapements tend to change the tension reading at whatever angle said tensiometer is held.
Claim 2
Dependent Claim
182 words
A rotating head tensiometer adapted for measurement of the tension on a running yarn, which comprises: a handle, a measuring head rotatably mounted on said handle and provided with walls surrounding an enclosure facing said handle; a beam carried in said enclosure for rotation with said measuring head relative to said handle, a pair of rollers rotatably mounted on said beam above said walls for rotation of said beam an amount proportional to yarn tension, a toothed wheel carried by said beam therearound for rotation therewith, and a plurality of escapements mounted therearound for oscillation about axes parallel to the axis of relative rotation of said handle and said measuring head, each of the escapement axes being coincident with the center of inertia of the respective escapement, each of said escapements being heavy, elongated, and having a pair of protuberances engaging the toothed surface of said toothed wheel, whereby moment of inertia is high even at low rates of head rotation and no weight bias of the heavy escapements tend to change the tension reading at whatever angle said tensiometer is held.
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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |