US3157265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Print interlock for typewriter
Assignee: International Business Machines Corp
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Filing: 1962-03-29
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Granted: 1964-11-17
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Leon E Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/54; B41J29/58; B41J29/64; B41J1/00; B41J1/60; B41J5/00; B41J5/08; B41J5/18; B41J5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A TYPEWRITER HAVING A PRINT HEAD WITH LOWER CASE AND UPPER CASE CHARACTERS FORMED ON DIFFERENT PORTIONS OF ITS SURFACE, FIRST KEY CONTROLLED MEANS OPERABLE TO EFFECT CASE SHIFT BY MOVING SAID HEAD TO PRESENT EITHER OF SAID SURFACE PORTIONS FOR THE SELECTION OF CHARACTERS, SECOND KEY CONTROLLED MEANS FOR MOVING SAID HEAD WITHIN THE AREA OF EITHER OF SAID PORTIONS PRESENTED TO EFFECT THE SELECTION OF CHARACTERS TO BE PRINTED, SAID SECOND KEY CONTROLLED MEANS INCLUDING A CLUTCH WHICH IS OPERABLE WHEN ENGAGED FOR POSITIONING SAID HEAD, A CONTROL MEMBER MOVABLE BETWEEN A FIRST POSITION HOLDING SAID CLUTCH DISENGAGED AND A SECOND POSITION PERMITTING ITS ENGAGEMENTS, A LATCH FOR HOLDING SAID CONTROL MEMBER IN SAID FIRST POSITION,
Claim 2
Dependent Claim
119 words
IN A TYPEWRITER HAVING A PRINT HEAD WITH LOWER CASE AND UPPER CASE CHARACTERS FORMED ON DIFFERENT PORTIONS OF ITS SURFACE, FIRST KEY CONTROLLED MEANS OPERABLE TO EFFECT CASE SHIFT BY MOVING SAID HEAD TO PRESENT EITHER OF SAID SURFACE PORTIONS FOR THE SELECTION OF CHARACTERS, SECOND KEY CONTROLLED MEANS FOR MOVING SAID HEAD WITHIN THE AREA OF EITHER OF SAID PORTIONS PRESENTED TO EFFECT THE SELECTION OF CHARACTERS TO BE PRINTED, SAID SECOND KEY CONTROLLED MEANS INCLUDING A CLUTCH WHICH IS OPERABLE WHEN ENGAGED FOR POSITIONING SAID HEAD, A CONTROL MEMBER MOVABLE BETWEEN A FIRST POSITION HOLDING SAID CLUTCH DISENGAGED AND A SECOND POSITION PERMITTING ITS ENGAGEMENTS, A LATCH FOR HOLDING SAID CONTROL MEMBER IN SAID FIRST POSITION,
References Cited (Backward Citations)
US2847105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |