US3714892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact hammer for liner printer
Assignee: DATA 100 (WARWICK) Inc
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Filing: 1970-10-20
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Granted: 1973-02-06
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Expires: 1990-10-20
Abstract
Abstract A plastic injection molded hammer for line printers is disclosed. The hammer comprises a tapered body and a hammer head projecting at approximately a right angle from the logitudinal dimension of the hammer body. The hammer body is hollow with an opening in the back of the body. The coil and core of an electromagnet are seated in the hollow portion of the body through the opening in the back of the body and an armature is embedded in the base of the body directly below the coil and core. In operation, the armature is attracted to the coil and the core, when the coil is energized, with such great force that the face of the hammer is whipped against the print anvil.
Inventors
- 👤 R Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:42
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/02; B41J9/133
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
A plastic hammer and electromagnet combination comprising, a molded plastic hammer having a tapered hollow body open in the back and a hammer head projecting from one end of said body; and an electromagnet having an armature embedded in the base of said body and a coil and core combination partially secured inside said hollow body directly above said armature, a pivot member on said core portion received within said hollow body, said hammer having bearing means pivotally mounted on said pivot member, ledges formed inside said hollow body along said armature, a spring having two arms, and means attaching said spring to said core with said two arms slidably resting on said ledges.
Claim 2
Dependent Claim
114 words
A plastic hammer and electromagnet combination comprising, a molded plastic hammer having a tapered hollow body open in the back and a hammer head projecting from one end of said body; and an electromagnet having an armature embedded in the base of said body and a coil and core combination partially secured inside said hollow body directly above said armature, a pivot member on said core portion received within said hollow body, said hammer having bearing means pivotally mounted on said pivot member, ledges formed inside said hollow body along said armature, a spring having two arms, and means attaching said spring to said core with said two arms slidably resting on said ledges.
Claim 3
Dependent Claim
114 words
A plastic hammer and electromagnet combination comprising, a molded plastic hammer having a tapered hollow body open in the back and a hammer head projecting from one end of said body; and an electromagnet having an armature embedded in the base of said body and a coil and core combination partially secured inside said hollow body directly above said armature, a pivot member on said core portion received within said hollow body, said hammer having bearing means pivotally mounted on said pivot member, ledges formed inside said hollow body along said armature, a spring having two arms, and means attaching said spring to said core with said two arms slidably resting on said ledges.
Claim 4
Dependent Claim
114 words
A plastic hammer and electromagnet combination comprising, a molded plastic hammer having a tapered hollow body open in the back and a hammer head projecting from one end of said body; and an electromagnet having an armature embedded in the base of said body and a coil and core combination partially secured inside said hollow body directly above said armature, a pivot member on said core portion received within said hollow body, said hammer having bearing means pivotally mounted on said pivot member, ledges formed inside said hollow body along said armature, a spring having two arms, and means attaching said spring to said core with said two arms slidably resting on said ledges.
Claim 5
Dependent Claim
153 words
A plastic hammer for a line printer comprising, a hollow body open in the back and having a base on one end and a neck portion near the other end, said body tapering downward from said base to said neck portion, a hammer head integrally formed with said neck portion and projecting outward from said body, a hammer face secured to said hammer head, a shelf formed inside said body in said neck portion and a pair of ledges formed inside said hollow body near said base, an armature embedded in said base, a coil and core combination partially secured inside said hollow body above said armature, a pivot member fastened to said core and received within said hollow body, said hammer having bearing means pivotally mounted on said pivot member, a spring having two arms, and means attaching said spring to said core with said two arms slidably resting on said ledges.
Claim 6
Dependent Claim
153 words
A plastic hammer for a line printer comprising, a hollow body open in the back and having a base on one end and a neck portion near the other end, said body tapering downward from said base to said neck portion, a hammer head integrally formed with said neck portion and projecting outward from said body, a hammer face secured to said hammer head, a shelf formed inside said body in said neck portion and a pair of ledges formed inside said hollow body near said base, an armature embedded in said base, a coil and core combination partially secured inside said hollow body above said armature, a pivot member fastened to said core and received within said hollow body, said hammer having bearing means pivotally mounted on said pivot member, a spring having two arms, and means attaching said spring to said core with said two arms slidably resting on said ledges.
References Cited (Backward Citations)
US3001469A
Cited
US3149562A
Cited
US3233540A
Cited
US3301177A
Cited
US3228325A
Cited
US3349696A
Cited
US3513773A
Cited
US3418928A
Cited
US3434413A
Cited
US3447455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |