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Class Information
Number: 400/124.17
Name: Typewriting machines > Typing by other than type-face or type-die > Character formation by impact (e.g., wire matrix) > Printhead > With actuator > Actuator having electromagnet
Description: Subject matter wherein the means for producing the percussive force includes a looped conductor for conducting electrical current which produces a magnetic* field.










Sub-classes under this class:

Class Number Class Name Patents
400/124.23 Armature structure or mounting 91
400/124.18 Electrical component 44
400/124.21 With biasing means 70


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
7374354 Armature, wire dot printer head and wire dot printer May. 20, 2008
7331726 Armature, wire dot printer head and wire dot printer Feb. 19, 2008
7329059 Wire dot printer head and wire dot printer Feb. 12, 2008
7314323 Wire dot printer head and wire dot printer Jan. 1, 2008
7258499 Wire dot printer head and wire dot printer Aug. 21, 2007
7246960 Print head Jul. 24, 2007
7008126 Wire dot printer head and wire dot printer Mar. 7, 2006
6994482 Wire dot printer head and wire dot printer Feb. 7, 2006
6872016 Impact dot print head and a printer including the same Mar. 29, 2005
6821035 Line printer with staggered magnetics Nov. 23, 2004
5611631 Impact printer with reduced electrocorrosion using Zener diode for static discharge Mar. 18, 1997
5527117 Braille printing solenoid housing Jun. 18, 1996
5435656 Back stop structure for matrix pin print head Jul. 25, 1995
5372437 Print head of wire-dot printer and production method thereof Dec. 13, 1994
5328279 Dot matrix printer head Jul. 12, 1994
5312194 Printing head for printer May. 17, 1994
5312195 Electromagnetic drive mechanism for the printing pin of a print head May. 17, 1994
5295750 Wire-dot impact printer Mar. 22, 1994
5290113 Wire dot printing head Mar. 1, 1994
5281037 Wire dot print head and method for manufacturing same Jan. 25, 1994
5071267 Actuation magnet for a printing stylus of a matrix printer Dec. 10, 1991
4749976 Solenoid Jun. 7, 1988
4611393 Process for producing a dot printer head Sep. 16, 1986
4561790 Wire matrix print head apparatus Dec. 31, 1985
4562446 Ink-dot printer with magnetic ink attracting and retention preventing means Dec. 31, 1985
4513661 Dot matrix line printer Apr. 30, 1985
RE31813 Print wire solenoid Jan. 22, 1985
4490057 Print wire solenoid Dec. 25, 1984
4487515 Multiple action print head control circuit for a dot matrix printer Dec. 11, 1984
4484170 Dot matrix print head solenoid assembly Nov. 20, 1984
4480934 Ballistic print wire actuator using a telescopic armature Nov. 6, 1984
4468142 Pint wire actuator Aug. 28, 1984
4441830 Printing solenoid Apr. 10, 1984
4389126 Serial impact printer having two printing modes Jun. 21, 1983
4377348 Printer head for serial dot printer Mar. 22, 1983
4373438 Dot printer Feb. 15, 1983
4371274 Apparatus for dot-matrix printing with proportional character spacing Feb. 1, 1983
4358795 Graphic scanning and printing device Nov. 9, 1982
4350450 Stylus printing head comprising electromagnets on resilient supports Sep. 21, 1982
4341478 Wire printing device Jul. 27, 1982
4331010 Dot printer May. 25, 1982
4300845 Dot matrix print head Nov. 17, 1981
4285603 Wire printing device Aug. 25, 1981
4272748 Print wire solenoid Jun. 9, 1981
4259653 Electromagnetic reciprocating linear actuator with permanent magnet armature Mar. 31, 1981
4254643 Dot printer Mar. 10, 1981
4236837 Operating mechanism for a dot matrix printer Dec. 2, 1980
4226545 Electromagnetic drive for recording pins in a matrix printer Oct. 7, 1980
4211496 Printing solenoid Jul. 8, 1980
4208138 Dot matrix printer head Jun. 17, 1980

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