US3748613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Print device for a printer
Assignee: Bull SAS
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Filing: 1972-09-05
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Granted: 1973-07-24
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Expires: 1992-09-05
Abstract
Abstract A striking device is provided for a printer in which the print hammer is integral with the free end of a flexible plate, the other end being stationary. The device includes two independent magnetic circuits with mobile armatures which are attached to said flexible plate and are capable of bending this plate in either of two opposite directions.
Inventors
- 👤 H Venker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:16
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/26; B41J9/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
A striking device for a printer, wherein the striking hammer thereof is attached to the free end of an elastic blade whose other end is fixed, wherein a first movable armature is fixed on said elastic blade and is a part of a first magnetic circuit on which is mounted a first electromagnetic winding adapted to act on said first armature whereby said elastic blade is bent in a direction opposite to its direction of striking, characterized in that said device comprises a second magnetic circuit, independent of said first magnetic circuit and on which is mounted a second electromagnetic winding adapted to act on a second movable armature said second movable armature also being borne by said elastic blade and associated with said second magnetic circuit, whereby said elastic blade is attracted in the direction of the striking.
Claim 2
Dependent Claim
139 words
A striking device for a printer, wherein the striking hammer thereof is attached to the free end of an elastic blade whose other end is fixed, wherein a first movable armature is fixed on said elastic blade and is a part of a first magnetic circuit on which is mounted a first electromagnetic winding adapted to act on said first armature whereby said elastic blade is bent in a direction opposite to its direction of striking, characterized in that said device comprises a second magnetic circuit, independent of said first magnetic circuit and on which is mounted a second electromagnetic winding adapted to act on a second movable armature said second movable armature also being borne by said elastic blade and associated with said second magnetic circuit, whereby said elastic blade is attracted in the direction of the striking.
Claim 3
Dependent Claim
26 words
The device of claim 1, wherein the two magnetic circuits thereof and their armatures are identical and disposed symmetrically on each side of said elastic blade.
Claim 4
Dependent Claim
80 words
The device of claim 2, wherein each of said magnetic circuits is formed by a curved branch on which is mounted the corresponding winding, wherein each armature is formed of a flexible magnetic blade attached in magnetic unsulating manner on the elastic blade bearing such striking hammer, each such magnetic blade being magnetically coupled to a respective one of the ends of the corresponding curved branch and adapted to contact, by elastic deformation, the other end of said curved branch.
Claim 5
Dependent Claim
70 words
The device of claim 2, wherein each of said magnetic circuits is formed of a loop, opened by an air gap, on which is mounted a corresponding winding, wherein each of said armatures is formed of a magnetic body, attached in a magnetic insulating manner to the elastic blade bearing the striking hammer and capable of reaching the corresponding air gap to join the oppOsing ends of the corresponding loop.
Claim 6
Dependent Claim
122 words
A striking device for a printer comprising; an elastic blade having a striking hammer attached to one end thereof and the opposite end substantially fixed, a first magnetic circuit including a first movable armature attached to said elastic blade and a first electromagnetic winding disposed in spaced relation with said first armature for moving said elastic blade in a direction opposite to its striking direction when said first circuit is energized, a second magnetic circuit independent of said first magnetic circuit and including a second movable armature attached to said elastic blade and a second electromagnetic winding disposed in spaced relation with said second movable armature for moving said elastic blade in the direction of striking when said second circuit is energized.
Claim 7
Dependent Claim
122 words
A striking device for a printer comprising; an elastic blade having a striking hammer attached to one end thereof and the opposite end substantially fixed, a first magnetic circuit including a first movable armature attached to said elastic blade and a first electromagnetic winding disposed in spaced relation with said first armature for moving said elastic blade in a direction opposite to its striking direction when said first circuit is energized, a second magnetic circuit independent of said first magnetic circuit and including a second movable armature attached to said elastic blade and a second electromagnetic winding disposed in spaced relation with said second movable armature for moving said elastic blade in the direction of striking when said second circuit is energized.
Claim 8
Dependent Claim
94 words
The device of claim 5 wherein each of said magnetic circuits is formed by a curved branch having one of said respective windings mounted therein and wherein each of said armatures is formed of a flexible magnetic blade attached to said elastic blade and magnetically insulated therefrom, each of said magnetic blades being magnetically coupled with a respective one of the ends of said corresponding curved branch and adapted to contact the other end of said curved branch when said elastic blade is moved by energization of one of said first or second circuits.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |