US3282203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically operated print hammers in high speed printers
Assignee: Unisys Corp
•
Filing: 1964-04-16
•
Granted: 1966-11-01
•
Expires: 1984-04-16
Abstract
No abstract record available.
Inventors
- 👤 Kalbach John Frederick
- 👤 Paige Walter Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:25
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/26; B41J9/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PRINTING DEVICE COMPRISING: A ROTATABLE TYPE DRUM; A PLURALITY OF PARALLELEPIPED SHAPED CERAMIC MAGNETS POSITIONED IN A SUBSTANTIALLY STRAIGHT ROW PARALLEL WITH THE AXIS OF SAID TYPE DRUM, EACH OF SAID MAGNETS COOPERATING WITH THE ADJACENT MAGNET, AT BOTH SIDES, TO DEFINE SLOT-SHAPED GAPS THEREBETWEEN; AND A HAMMER ASSEMBLY FOR EACH GAP COMPRISING AN ELONGATED MEMBER HAVING A HAMMER TIP AT ONE END, A SUBSTANTIALLY FLAT COIL MECHANICALLY CONNECTED INTERMEDIATE THE ENDS OF THE MEMBER WITH THE AXIS OF THE COIL PERPENDICULAR TO THE ELONGATION OF SAID MEMBER AND MEANS INCLUDING A PAIR OF FLATSPRINGS CONNECTED TO THE HAMMER ASSEMBLY AND ADAPTED FOR SUPPORTING EACH HAMMER ASSEMBLY SUCH THAT THE COIL IS FREE TO MOVE IN THE CORRESPONDING GAP TOWARD AND AWAY FROM THE SURFACE OF SAID DRUM, THE SPRINGS COMPRISING AN ELECTRICALLY CONDUCTIVE MATERIAL AND CONNECTED TO THE ENDS OF SAID COIL FOR PROVIDING AN ELECTRICAL CURRENT PATH THERETO, THE MAGNETS BEING MAGNETIZED PARALLEL TO THE AXES OF THE COILS SO THAT CURRENT APPLIED
Claim 2
Dependent Claim
166 words
A PRINTING DEVICE COMPRISING: A ROTATABLE TYPE DRUM; A PLURALITY OF PARALLELEPIPED SHAPED CERAMIC MAGNETS POSITIONED IN A SUBSTANTIALLY STRAIGHT ROW PARALLEL WITH THE AXIS OF SAID TYPE DRUM, EACH OF SAID MAGNETS COOPERATING WITH THE ADJACENT MAGNET, AT BOTH SIDES, TO DEFINE SLOT-SHAPED GAPS THEREBETWEEN; AND A HAMMER ASSEMBLY FOR EACH GAP COMPRISING AN ELONGATED MEMBER HAVING A HAMMER TIP AT ONE END, A SUBSTANTIALLY FLAT COIL MECHANICALLY CONNECTED INTERMEDIATE THE ENDS OF THE MEMBER WITH THE AXIS OF THE COIL PERPENDICULAR TO THE ELONGATION OF SAID MEMBER AND MEANS INCLUDING A PAIR OF FLATSPRINGS CONNECTED TO THE HAMMER ASSEMBLY AND ADAPTED FOR SUPPORTING EACH HAMMER ASSEMBLY SUCH THAT THE COIL IS FREE TO MOVE IN THE CORRESPONDING GAP TOWARD AND AWAY FROM THE SURFACE OF SAID DRUM, THE SPRINGS COMPRISING AN ELECTRICALLY CONDUCTIVE MATERIAL AND CONNECTED TO THE ENDS OF SAID COIL FOR PROVIDING AN ELECTRICAL CURRENT PATH THERETO, THE MAGNETS BEING MAGNETIZED PARALLEL TO THE AXES OF THE COILS SO THAT CURRENT APPLIED
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |