B - Operations – Transporting – 41 – B
Patent
B - Operations, Transporting
41
B
101/115
B41B 1/00 (2006.01) B41J 9/127 (2006.01) B41J 9/38 (2006.01) H01F 3/00 (2006.01) H01F 7/13 (2006.01)
Patent
CA 1159715
Abstract This disclosure deals with an electromagnetic ram actuator, the electromagnet of which consists of two symmetrically designed magnet- izable yoke halves. The facing pole ends of the yoke halves are in each case essentially semicircularly recessed, forming two aligned essentially circular operating gaps. Between the operating gaps a ram is arranged which is shiftable in The direction of their line of alignment and whose cross-section is adapted to the area of the operating gaps. The ram comprises two armature disks of magnetizable material and a spacer element arranged therebetween consisting of predominantly non-magnetizable material. One armature disk is associated with each operating gap. The armature disks are geo- metrically designed in such a manner that their volume is of the order of the operating gap volume. In the starting position of the ram the armature disks are positioned in front of the operating gaps of the electromagnet in its non-excited state. Upon excitation of the electromagnet, they are pulled into its operating gaps, being accelerated in the process. The ram actuator is particularly suitable for use in impact printers. GE9-80-014
374288
Bohg Armin
Hartmann Kurt
International Business Machines Corporation
Kerr Alexander
LandOfFree
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