US3952853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical shift mechanism
Assignee: TRIUMPH-ADLER AG A CORP OF GERMANY
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Filing: 1974-10-29
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Granted: 1976-04-27
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Expires: 1994-10-29
Abstract
Abstract A pair of electromagnets, each including pole faces separated by an air gap, cooperate with a permanent bar magnet, the ends of which extend into the electromagnet air gaps. Polarization of the electromagnets causes the bar magnet to shift into four possible positions thereby shifting a coupled print head to bring one of its four type bands into printing position.
Inventors
- 👤 Edward Feldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/50; B41J7/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
A mechanism for shifting a print head containing a plurality of type bands into a number of operative positions comprising: electromagnet means comprising core means and winding means; said winding means being selectively coupled to a source of electrical energy for establishing a magnetic field; actuating means for causing variations in said magnetic field; a shifting element comprising magnet means in operative proximity to said magnetic means and being moved in response to said magnetic field; said electromagnet means comprising a pair of electromagnets each having a core including a gap region defined by a pair of separated opposed pole faces and a winding; said magnet means comprising a member having a first portion with an associated first magnetic polarity extending into the gap region of a first of said electromagnets and a second portion with an associated second magnetic polarity extending into the gap region of a second of said electromagnets; and a print head coupled to said shifting element; said shifting element being movable into any one of a plurality of positions in accordance with variations in said magnetic field; whereby said print head is correspondingly moved into any one of a plurality of positions.
Claim 2
Dependent Claim
197 words
A mechanism for shifting a print head containing a plurality of type bands into a number of operative positions comprising: electromagnet means comprising core means and winding means; said winding means being selectively coupled to a source of electrical energy for establishing a magnetic field; actuating means for causing variations in said magnetic field; a shifting element comprising magnet means in operative proximity to said magnetic means and being moved in response to said magnetic field; said electromagnet means comprising a pair of electromagnets each having a core including a gap region defined by a pair of separated opposed pole faces and a winding; said magnet means comprising a member having a first portion with an associated first magnetic polarity extending into the gap region of a first of said electromagnets and a second portion with an associated second magnetic polarity extending into the gap region of a second of said electromagnets; and a print head coupled to said shifting element; said shifting element being movable into any one of a plurality of positions in accordance with variations in said magnetic field; whereby said print head is correspondingly moved into any one of a plurality of positions.
Claim 3
Dependent Claim
29 words
A mechanism for shifting a print head as set forth in claim 1, wherein: said electromagnet gap regions are opposed to each other and equidistant from a predetermined plane.
Claim 4
Dependent Claim
68 words
A mechanism for shifting a print head as set forth in claim 2, wherein: each of said electromagnet pole faces include a first portion mutually parallel to the corresponding first portions of said other pole faces and a second portion inclined with respect to said first portion; the second portion of one electromagnet pole face being parallel to the second portion of another opposite, alternate electromagnet pole face.
Claim 5
Dependent Claim
48 words
A mechanism for shifting a print head as set forth in claim 3, wherein: said member is movable into a plurality of positions determinable by the respective magnetic polarity of each of said pole faces and the polarity associated with the first and second portions of said member.
Claim 6
Dependent Claim
42 words
A mechanism for shifting a print head as set forth in claim 4, wherein: said member comprises a longitudinally extending bar the end portions thereof being adaptable to make contact with either the first or second portions of said electromagnet pole faces.
Claim 7
Dependent Claim
48 words
A mechanism for shifting a print head as set forth in claim 5, wherein: said bar is permanently magnetized; said source of electrical energy being polarized to thereby control the polarity of said pole faces in accordance with the direction of current flow in each of said windings.
Claim 8
Dependent Claim
98 words
A mechanism for shifting a print head as set forth in claim 6, wherein: said bar is pivotable substantially about its center point for permitting the end portions thereof to contact alternate opposite second portions of said electromagnet pole faces; and said bar is translatable parallel to its longitudinal axis to permitting the end portions thereof to contact alternate opposite first portions of said electromagnet pole faces; linkage means for coupling said print head to said bar; whereby the type bands on said print head are brought into printing position in accordance with the movement of said bar.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |