US3138427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-responsive recording
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1959-12-23
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Granted: 1964-06-23
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Expires: 1979-12-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Stein
- 👤 Leonard K Sorgi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:51
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; H04N1/14; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/125; H02H7/127; H04N1/024; H04N1/032; H04N1/0323; H04N1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A RECORDER COMPRISING MEANS FOR SUPPORTING AND FEEDING A RECORDING BLANK, AND MARKING MECHANISM FOR MARKING SAID BLANK, SAID MARKING MECHANISM INCLUDING AN ELONGATED ELECTROMAGNET EXTENDING ACROSS THE WIDTH OF SAID BLANK AND HAVING A MAGNETIZABLE CORE OF SUBSTANTIALLY U-SHAPED CROSS SECTION THROUGHOUT FORMING A MAGNETIC CIRCUIT HAVING A GAP, SAID CORE BEING PROVIDED AT THE TOP WITH A SUBSTANTIALLY FLAT BEARING SURFACE ADJACENT SAID GAP, A SLIDABLE ARMATURE FOR SAID ELECTROMAGNET RESTING ON AND SUPPORTED BY SAID BEARING SURFACE AND BRIDGING THE GAP IN SAID CORE, AND AN ELONGATED RECTILINEAR MARKING EDGE ON SAID ARMATURE AND POSITIONED TO ENGAGE THE SURFACE OF
Claim 2
Dependent Claim
103 words
A RECORDER COMPRISING MEANS FOR SUPPORTING AND FEEDING A RECORDING BLANK, AND MARKING MECHANISM FOR MARKING SAID BLANK, SAID MARKING MECHANISM INCLUDING AN ELONGATED ELECTROMAGNET EXTENDING ACROSS THE WIDTH OF SAID BLANK AND HAVING A MAGNETIZABLE CORE OF SUBSTANTIALLY U-SHAPED CROSS SECTION THROUGHOUT FORMING A MAGNETIC CIRCUIT HAVING A GAP, SAID CORE BEING PROVIDED AT THE TOP WITH A SUBSTANTIALLY FLAT BEARING SURFACE ADJACENT SAID GAP, A SLIDABLE ARMATURE FOR SAID ELECTROMAGNET RESTING ON AND SUPPORTED BY SAID BEARING SURFACE AND BRIDGING THE GAP IN SAID CORE, AND AN ELONGATED RECTILINEAR MARKING EDGE ON SAID ARMATURE AND POSITIONED TO ENGAGE THE SURFACE OF
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |