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Class Information
Number: 400/124.18
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 > Electrical component
Description: Subject matter including significant structure to an electric circuit or any portion thereof for conducting electric current through the looped conductor.










Sub-classes under this class:

Class Number Class Name Patents
400/124.19 Moving coil 17
400/124.2 Permanent magnet 58


Patents under this class:

Patent Number Title Of Patent Date Issued
7374354 Armature, wire dot printer head and wire dot printer May. 20, 2008
7172351 Method for manufacturing an armature Feb. 6, 2007
6801335 Method of controlling impact printer noise Oct. 5, 2004
6695495 Constant density printer system Feb. 24, 2004
5674015 Arrangement of actuators and tip ends in a wire dot print head Oct. 7, 1997
5674014 Printhead driver circuit for line printers Oct. 7, 1997
5257868 Printer head for printer Nov. 2, 1993
5174663 Wire dot print head and method for manufacturing same Dec. 29, 1992
5150976 Matrix printing head with forward and return articulated-armature magnets Sep. 29, 1992
5080510 Matrix print head with an electromagnetic coil support Jan. 14, 1992
5074687 Armature of an electromagnet-coil/armature system for dot matrix print heads, and method of manufacturing same Dec. 24, 1991
5056942 Dot printer head Oct. 15, 1991
5039235 Printer utilizing improved impact dot print head Aug. 13, 1991
5033885 Dot matrix pin print head Jul. 23, 1991
5024542 Magnetic actuator Jun. 18, 1991
5024543 Impact dot print head Jun. 18, 1991
4979836 Matrix pin print head of the hinged-clapper-armature construction Dec. 25, 1990
4895464 Wire matrix print head assembly Jan. 23, 1990
4840501 Three pole printhead actuator Jun. 20, 1989
4833980 High efficiency coil posts for print hammer actuators May. 30, 1989
4818133 High speed wire matrix print head Apr. 4, 1989
4810112 Dot matrix print head of improved type Mar. 7, 1989
4767227 Print wire driving device for wire type dot printer Aug. 30, 1988
4755068 Dot matrix print head assembly Jul. 5, 1988
4687354 Dot matrix printer head Aug. 18, 1987
4681467 Impact printing applications Jul. 21, 1987
4674897 Actuator for dot matrix printhead Jun. 23, 1987
4661002 Dot matrix printer Apr. 28, 1987
4626115 Dot printer head Dec. 2, 1986
4597680 Dot printer head with alternate magnetic flux paths Jul. 1, 1986
4583871 Dot printer head with magnetic circuit through adjacent armatures Apr. 22, 1986
4572070 Needle-carrying head for a printing machine Feb. 25, 1986
4569605 Wire driving armature for dot printer Feb. 11, 1986
4568207 Magnetic actuator mechanism Feb. 4, 1986
4541745 Print head construction Sep. 17, 1985
4443122 Dot matrix print head Apr. 17, 1984
4273452 Print head for a dot printer Jun. 16, 1981
4244658 Dot printer head Jan. 13, 1981
4222674 Head portion of a dot printer Sep. 16, 1980
4197021 Printing head for a wire-type dot printer Apr. 8, 1980
4080892 Apparatus for driving dotting hammers of a matrix printer Mar. 28, 1978
4049107 Printing devices or heads for printers or the like and a process for making such a printing head Sep. 20, 1977
3973661 Wire-matrix printers, and electromagnetic actuator mechanisms useful in such printers Aug. 10, 1976
3967714 Matrix printer having detachable elements Jul. 6, 1976











 
 
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