US3759359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire matrix printer heads
Assignee: Datasaab AB
•
Filing: 1972-02-01
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Granted: 1973-09-18
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Expires: 1992-02-01
Abstract
Abstract A wire matrix printer head has the recording ends of wires positioned to form a matrix of five vertical columns of seven points each. The head is pivotally mounted on a carriage moveable in the direction of printing and an electromagnet on the carriage attracts an armature plate on the printer head to tilt the printer head downwardly to print certain characters so that the vertical range of printing of the recording ends is extended beyond the seven points of the vertical columns of the matrix.
Inventors
- 👤 D Stellmach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:30
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/485; B41J2/505; B41J2/5056; B41J2/22; B41J2/23; B41J2/235; B41J2/24; B41J25/00; B41J25/001
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
In a wire matrix printer, the combination of elongated guide means parallel to a line of printing, a carriage slideably mounted on said guide means for movement in the direction of printing, a printer head pivotally mounted on said carriage and tiltable in a vertical plane, a plurality of elongated characterforming recording elements on said printer head to define a matrix having a predetermined number of horizontal and vertical ends and adapted to be operated selectively for moving their recorded ends into and out of engagement with a record medium, means for selectively extending the vertical range of printing of said recording ends beyond said predetermined number of vertically positioned recording ends consisting of means selectively pivoting said printer head to momentarily lower the recording ends of said recording elements to print a character, said pivoting means comprising an armature plate on said printer head and an electromagnet on said carriage opposed from said armature plate and energized in response to predetermined signals corresponding to the characters to be printed.
Claim 2
Dependent Claim
170 words
In a wire matrix printer, the combination of elongated guide means parallel to a line of printing, a carriage slideably mounted on said guide means for movement in the direction of printing, a printer head pivotally mounted on said carriage and tiltable in a vertical plane, a plurality of elongated characterforming recording elements on said printer head to define a matrix having a predetermined number of horizontal and vertical ends and adapted to be operated selectively for moving their recorded ends into and out of engagement with a record medium, means for selectively extending the vertical range of printing of said recording ends beyond said predetermined number of vertically positioned recording ends consisting of means selectively pivoting said printer head to momentarily lower the recording ends of said recording elements to print a character, said pivoting means comprising an armature plate on said printer head and an electromagnet on said carriage opposed from said armature plate and energized in response to predetermined signals corresponding to the characters to be printed.
Claim 3
Dependent Claim
40 words
In a wire matrix printer as claimed in claim 1 wherein said guide means comprise a pair of parallel guide rods, said printer head pivotally mounted in the vicinity of the guide rod further away from the line of printing.
Claim 4
Dependent Claim
50 words
In a wire matrix printer as claimed in claim 1 and comprising a U-shaped guide rail on the underside of said printer head, means on said carriage defining a horizontal lip, said guide rail contacting the underside of said lip when the printer head is in its normal printing position.
Claim 5
Dependent Claim
38 words
In a wire matrix printer as claimed in claim 3 and comprising spring means between said carriage and said printer head to maintain said printer head in its normal position so that an air gap is formed therebetween.
References Cited (Backward Citations)
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |