Patent US3658429A successfully refreshed from Google Patents.
US3658429A
Expired / Lapsed
US
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Displacement measuring apparatus
Assignee: Warner and Swasey Co
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Filing: 1970-05-11
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Granted: 1972-04-25
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Expires: 1990-05-11
Abstract
Abstract A displacement measuring device including a tape scribed or etched with a grating and arranged to be pulled out from a constant torque reel means by a telescoping measuring probe past a reading head designed to produce output signals corresponding to the relative movement of the tape grating and reading head to thereby yield output signals in response to the extension of the probe.
Inventors
- 👤 Richard B Zipin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:18
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/02; G01B3/04; G01B3/08; G01B11/00; G01B11/02; G01B11/06; G01B11/0608
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
Measuring apparatus for determining the displacement of a probe comprising: a flexible tape having an optical grating formed thereon; a Moire fringe reading head including means to produce electrical output signals in response to displacement of said grating past said reading head; feed means for producing corresponding movement of said tape past said head in response to displacement of said probe along at least one measuring direction, wherein said feed means includes a connection between said probe and one end of said flexible tape and windup reel means attached to the other end of said flexible tape; and a telescoping support for said probe, whereby output signals are produced by said reading head corresponding to said probe displacement.
Claim 2
Dependent Claim
118 words
Measuring apparatus for determining the displacement of a probe comprising: a flexible tape having an optical grating formed thereon; a Moire fringe reading head including means to produce electrical output signals in response to displacement of said grating past said reading head; feed means for producing corresponding movement of said tape past said head in response to displacement of said probe along at least one measuring direction, wherein said feed means includes a connection between said probe and one end of said flexible tape and windup reel means attached to the other end of said flexible tape; and a telescoping support for said probe, whereby output signals are produced by said reading head corresponding to said probe displacement.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 wherein said reel means includes a constant tension reel member relatively stationary with respect to said probe.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |