US3876050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armature structure for mosaic type printer
Assignee: Digital Equipment Corp
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Filing: 1973-11-01
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Granted: 1975-04-08
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Expires: 1993-11-01
Abstract
Abstract A printing device for printing characters which consist of a mosaic pattern, comprising a number of recording pins which are actuated by a number of electromagnets which are regularly arranged with respect to each other. The electromagnets comprise strip-like armatures having a tunnel profile formed therein in which the recording pins are clamped.
Inventors
- 👤 Ebbe Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:10
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/22; B41J2/23; B41J2/235; B41J2/25; B41J2/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
148 words
A printing device for printing characters which are composed by a mosaic of elements on an information carrier, said device comprising a body portion which includes a plurality of electromagnets a plurality of armatures each respectively disposed opposite an electromagnet of said body portion, said armatures each being formed of a metal strip of magnetic material and having a tubular portion formed in one end thereof and flanged edge portions formed at the other end thereof, a plurality of printing pins each respectively having a first portion secured in said tubular portion of a respective armature and a second portion extending from said tubular portion and substantially arranged transversely of the armature, and a plurality of leaf spring members, each of said spring members having one end secured to an armature at the said flange portion thereof and having the other end thereof secured to said body portion.
Claim 2
Dependent Claim
148 words
A printing device for printing characters which are composed by a mosaic of elements on an information carrier, said device comprising a body portion which includes a plurality of electromagnets a plurality of armatures each respectively disposed opposite an electromagnet of said body portion, said armatures each being formed of a metal strip of magnetic material and having a tubular portion formed in one end thereof and flanged edge portions formed at the other end thereof, a plurality of printing pins each respectively having a first portion secured in said tubular portion of a respective armature and a second portion extending from said tubular portion and substantially arranged transversely of the armature, and a plurality of leaf spring members, each of said spring members having one end secured to an armature at the said flange portion thereof and having the other end thereof secured to said body portion.
Claim 3
Dependent Claim
41 words
A printing device as claimed in claim 1 wherein the tubular portion of each of said strips comprises a narrowed portion of the metal strip, each narrowed portion having a bend about the longitudinal axis thereof to form said tubular portion.
Claim 4
Dependent Claim
41 words
A printing device as claimed in claim 2, wherein each of said armatures is provided with a longitudinally-extending groove at the portion of the armature adjacent said tubular portion and wherein the end of said pin is positioned within said groove.
Claim 5
Dependent Claim
24 words
A printing device as claimed in claim 1, wherein each armature is composed of soft iron and said printing pin is composed of tungsten.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |