US3176507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stressing members such as test specimens and the like
Assignee: Southern Research Institute
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Filing: 1961-12-08
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Granted: 1965-04-06
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Expires: 1981-12-08
Abstract
No abstract record available.
Inventors
- 👤 Frank J Digesu
- 👤 Coultas D Pears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:29
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
AN APPARATUS FOR TESTING THE TENSILE STRENGTH OF SPECIMENS HAVING A LONGITUDINAL AXIS AND A GIVEN CROSS SECTIONAL AREA, (A) MEANS CONNECTED TO ONE END OF THE SPECIMEN AND HOLDING IT AGAINST AXIAL MOVEMENT, (B) A FIRST MEMBER OPERATIVELY SECURED TO THE OTHER END OF THE SPECIMEN AND HAVING A SURFACE EXTENDING GENERALLY SYMMETRICALLY AND GENERALLY PERPENDICULAR TO SAID LONGITUDINAL AXIS, SAID SURFACE HAVING AN AREA LARGER THAN THE CROSS SECTIONAL AREA OF THE SPECIMEN, (C) A SECOND MEMBER HAVING A SURFACE SUBSTANTIALLY COEXTENSIVE WITH AND FACING THE SAID SURFACE OF SAID FIRST MEMBER AND SEPARATED THEREFROM BY A FILM OF GAS CONTINUOUSLY SUPPLIED FROM A SOURCE UNDER PRESSURE, AD (D) MEANS TO APPLY A FORCE TO SAID SECOND MEMBER IN A DIRECTION SO AS TO TEND TO DECREASE THE THICKNESS OF THE FILM OF GAS BETWEEN THE SAID SURFACES OF THE FIRST AND SECOND MEMBERS, THEREBY TO EXERT LONGITUDINAL PULL ON THE SPECIMEN.
Claim 2
Independent Claim
154 words
AN APPARATUS FOR TESTING THE TENSILE STRENGTH OF SPECIMENS HAVING A LONGITUDINAL AXIS AND A GIVEN CROSS SECTIONAL AREA, (A) MEANS CONNECTED TO ONE END OF THE SPECIMEN AND HOLDING IT AGAINST AXIAL MOVEMENT, (B) A FIRST MEMBER OPERATIVELY SECURED TO THE OTHER END OF THE SPECIMEN AND HAVING A SURFACE EXTENDING GENERALLY SYMMETRICALLY AND GENERALLY PERPENDICULAR TO SAID LONGITUDINAL AXIS, SAID SURFACE HAVING AN AREA LARGER THAN THE CROSS SECTIONAL AREA OF THE SPECIMEN, (C) A SECOND MEMBER HAVING A SURFACE SUBSTANTIALLY COEXTENSIVE WITH AND FACING THE SAID SURFACE OF SAID FIRST MEMBER AND SEPARATED THEREFROM BY A FILM OF GAS CONTINUOUSLY SUPPLIED FROM A SOURCE UNDER PRESSURE, AD (D) MEANS TO APPLY A FORCE TO SAID SECOND MEMBER IN A DIRECTION SO AS TO TEND TO DECREASE THE THICKNESS OF THE FILM OF GAS BETWEEN THE SAID SURFACES OF THE FIRST AND SECOND MEMBERS, THEREBY TO EXERT LONGITUDINAL PULL ON THE SPECIMEN.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |