US3138952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensometer device
Assignee: Primerica Inc
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Filing: 1960-11-04
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Granted: 1964-06-30
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Expires: 1980-11-04
Abstract
No abstract record available.
Inventors
- 👤 Dobbins Walter James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:54
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
AN APPARATUS FOR RECORDING LOAD VERSUS ELONGATION CHARACTERISTICS OF A TEST SPECIMEN SECURED BETWEEN UPPER AND LOWER CROSSHEADS OF A TENSILE TESTING MACHINE COMPRISING, A FIRST PINION AND FIRST GEAR ROTATABLY MOUNTED OR THE LOWER CROSSHEAD AND ADAPTED TO ROTATE IN UNISON ABOUT A COMMON AXIS, A FIRST RACK SECURED TOTHE UPPER CROSSHEAD AND MESHING WITH SAID FIRST PINION, MEANS FOR MAINTAINING SAID FIRST RACK IN MESHING ENGAGEMENT WITH SAID FIRST PINION, SAID FIRST RACK PROVIDING A RIGID CONNECTION BETWEEN SAID UPPER CROSSHEAD AND SAID FIRST PINION WHEREBY THE LINEAR DISPLACEMENT OF SAID LOWER CROSSHEAD RELATIVE TO SAID UPPER CROSSHEAD IS POSITIVELY CONVERTED INTO AN EXACT EQUIVALENT ANGULAR DISPLACEMENT OF SAID FIRST PINION AND SAID FIRST GEAR, A FRAME MEMBER HAVING A FIXED RELATIONSHIP TO SAID UPPER CROSSHEAD AND DISPOSED BELOW SAID LOWER CROSSHEAD, A SECOND PINION AND SECOND GEAR ROTATABLY MOUNTED ON SAID FRAME MEMBER AND ADAPTED TO ROTATE IN UNISON ABOUT A COMMON AXIS, A SECOND RANK MESHING WITH SAID FIRST GEAR AND SECOND PINION, MEANS FOR MAINTAINING SAID SECOND RACK IN MESHING ENGAGEMENT WITH SAID FIRST GEAR AND WITH SAID SECOND PINION, SAID SECOND RACK PROVIDING A RIGID CONNECTION BETWEEN SAID FIRST
Claim 2
Independent Claim
195 words
AN APPARATUS FOR RECORDING LOAD VERSUS ELONGATION CHARACTERISTICS OF A TEST SPECIMEN SECURED BETWEEN UPPER AND LOWER CROSSHEADS OF A TENSILE TESTING MACHINE COMPRISING, A FIRST PINION AND FIRST GEAR ROTATABLY MOUNTED OR THE LOWER CROSSHEAD AND ADAPTED TO ROTATE IN UNISON ABOUT A COMMON AXIS, A FIRST RACK SECURED TOTHE UPPER CROSSHEAD AND MESHING WITH SAID FIRST PINION, MEANS FOR MAINTAINING SAID FIRST RACK IN MESHING ENGAGEMENT WITH SAID FIRST PINION, SAID FIRST RACK PROVIDING A RIGID CONNECTION BETWEEN SAID UPPER CROSSHEAD AND SAID FIRST PINION WHEREBY THE LINEAR DISPLACEMENT OF SAID LOWER CROSSHEAD RELATIVE TO SAID UPPER CROSSHEAD IS POSITIVELY CONVERTED INTO AN EXACT EQUIVALENT ANGULAR DISPLACEMENT OF SAID FIRST PINION AND SAID FIRST GEAR, A FRAME MEMBER HAVING A FIXED RELATIONSHIP TO SAID UPPER CROSSHEAD AND DISPOSED BELOW SAID LOWER CROSSHEAD, A SECOND PINION AND SECOND GEAR ROTATABLY MOUNTED ON SAID FRAME MEMBER AND ADAPTED TO ROTATE IN UNISON ABOUT A COMMON AXIS, A SECOND RANK MESHING WITH SAID FIRST GEAR AND SECOND PINION, MEANS FOR MAINTAINING SAID SECOND RACK IN MESHING ENGAGEMENT WITH SAID FIRST GEAR AND WITH SAID SECOND PINION, SAID SECOND RACK PROVIDING A RIGID CONNECTION BETWEEN SAID FIRST
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |