Patent US3629755A successfully refreshed from Google Patents.
US3629755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammer actuator construction for high-speed printers
Assignee: Data Printer Corp
•
Filing: 1970-09-08
•
Granted: 1971-12-21
•
Expires: 1990-09-08
Abstract
Abstract A print hammer actuator for high-speed printers comprising a ferromagnetic core, an armature pivoted to the core, a coil on the core, and a nonmagnetic spacer comprising a strip of flexible insulating material held on the core in position to be struck by the armature when the coil is energized.
Inventors
- 👤 Frank H Schaller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:14
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/26; B41J9/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
A hammer actuator for a high-speed printer, comprising a ferromagnetic core having a central leg portion and a pair of parallel leg portions extending from said central leg portion and terminating in adjacent parallel pole faces, a strip of flexible nonmagnetic material extending along a portion of a first side of of said legs, over the pole face on that leg and down a portion of said first leg on a second side of said first leg opposite said first side, a coil bobbin mounted on said first leg adjacent said pole piece and engaging snugly, surrounding and securing the portions of said strip on the sides of said first leg, an electromagnetic coil wound on said bobbin, a ferromagnetic armature, and means pivotally mounting said armature on said core for pivotal motion into and out of engagement with said strip, whereby current flowing through said coil produces a field attracting said armature into engagement with said strip.
Claim 2
Dependent Claim
158 words
A hammer actuator for a high-speed printer, comprising a ferromagnetic core having a central leg portion and a pair of parallel leg portions extending from said central leg portion and terminating in adjacent parallel pole faces, a strip of flexible nonmagnetic material extending along a portion of a first side of of said legs, over the pole face on that leg and down a portion of said first leg on a second side of said first leg opposite said first side, a coil bobbin mounted on said first leg adjacent said pole piece and engaging snugly, surrounding and securing the portions of said strip on the sides of said first leg, an electromagnetic coil wound on said bobbin, a ferromagnetic armature, and means pivotally mounting said armature on said core for pivotal motion into and out of engagement with said strip, whereby current flowing through said coil produces a field attracting said armature into engagement with said strip.
Claim 3
Independent Claim
21 words
The apparatus of claim l, in which said strip consists of a polyester condensation product of terephthalic acid and ethylene glycol.
Claim 4
Dependent Claim
56 words
The apparatus of claim 2, in which said means pivotally mounting said armature comprises a pair of parallel ears formed on said second leg and extending from said second leg in a direction away from said first leg, a hammer actuator arm pivotally mounted between said ears, and means securing said actuating arm to said armature.
References Cited (Backward Citations)
US1789417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |