Patent US4254887A successfully refreshed from Google Patents.
Patent US3848719A successfully refreshed from Google Patents.
US3848719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing device comprising electro-magnets
Assignee: US Philips Corp
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Filing: 1970-07-09
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Granted: 1974-11-19
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Expires: 1990-07-09
Abstract
Abstract Device for printing dots selected from series of dots arranged on a line, comprising a from a of separately energizable electromagnets having movable cores, the pulses of which are transferred to printing styli striking a printing surface. According to the invention said electro-magnets, arranged in a common cage parallel to each other in the direction of striking, have their cores prolonged by pushing members acting upon levers arranged substantially along radii from the striking zone, said levers bearing on the periphery of said cage and holding at their free ends said printing styli and exerting on said cores an elastic pressure in the direction towards their rest positions.
Inventors
- 👤 L Milan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:49
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/22; B41J2/23; B41J2/27; B41J2/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A device for printing dots selected from a series arranged in a line, comprising a plurality of separately energizable elongated electro-magnets having parallel longitudinal axes arranged in a circle, a cylindrical enclosure surrounding the plurality of electro-magnets, each electro-magnet having an axial movable core, a plurality of L-shaped printing levers substantially radially arranged within the enclosure, each printing lever having one end attached to the enclosure and having an opposite end arranged within a line formed by said opposite ends, and a plurality of pushing members attached to the cores of the electro-magnets, each pushing member aligned with a corresponding printing lever, the printing levers exerting a biasing force on the pushing members in a direction corresponding to the rest position of the cores, said levers being formed by tongues punched from an elastic, flat disc fixed to the periphery of said cylindrical enclosure and pointing inwardly into the cylindrical enclosure, the end of each tongue being provided with a printing stylus.
Claim 2
Independent Claim
162 words
A device for printing dots selected from a series arranged in a line, comprising a plurality of separately energizable elongated electro-magnets having parallel longitudinal axes arranged in a circle, a cylindrical enclosure surrounding the plurality of electro-magnets, each electro-magnet having an axial movable core, a plurality of L-shaped printing levers substantially radially arranged within the enclosure, each printing lever having one end attached to the enclosure and having an opposite end arranged within a line formed by said opposite ends, and a plurality of pushing members attached to the cores of the electro-magnets, each pushing member aligned with a corresponding printing lever, the printing levers exerting a biasing force on the pushing members in a direction corresponding to the rest position of the cores, said levers being formed by tongues punched from an elastic, flat disc fixed to the periphery of said cylindrical enclosure and pointing inwardly into the cylindrical enclosure, the end of each tongue being provided with a printing stylus.
References Cited (Backward Citations)
GB537343A
Cited
US3099711A
Cited
US3209681A
Cited
US3254750A
Cited
US3243031A
Cited
US3467232A
Cited
FR1577409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |