公开(公告)号：CA1130639A

公开(公告)日：1982-08-31

申请号：CA348149

申请日：1980-03-21

Applicant: IBM

Inventor： BOHG ARMIN ,  HARTMANN KURT

IPC: B41J2/425 ,  B41J2/395 ,  B41J3/00 ,  H01J1/88

Abstract: ELECTRODE GUIDE FOR METAL PAPER PRINTERS Guide for electrodes in a metal paper printer in which V-shaped grooves are formed in monocrystalline silicon by crystallographic etching and the guide is thereafter coated with a glass passivation layer. GE979019

公开(公告)号：DE2961451D1

公开(公告)日：1982-01-28

申请号：DE2961451

申请日：1979-08-23

Applicant: IBM

Inventor： HARTMANN KURT ,  MATTHAEI HORST

IPC: G11B17/30 ,  G11B5/016 ,  G11B17/02

Abstract: For producing a transducer access opening in a stack of rotating flexible magnetic record disks, a co-rotating part axially deflects the peripheral edges of selected disks for partially axially separating same. The co-rotating part may take the form of a thin disk, several thin disks, or shaped as a roll. The axis of the roll is obliquely inclined against the disk pack rotational axis. The roll has a resilient surface such that, after the roll has been inserted into the disk pack, the flexible disks move up the outer surface of the roll to be deflected.

公开(公告)号：BR8603482A

公开(公告)日：1987-03-04

申请号：BR8603482

申请日：1986-07-24

Applicant: IBM

Inventor： BOHG ARMIN ,  FISCHER LUDWIG ,  GANTZ BRUNO ,  HARTMANN KURT ,  WOLFERT GERHARD

IPC: B41J2/275 ,  H01F7/08 ,  B41J3/12

公开(公告)号：DE3114834A1

公开(公告)日：1982-11-04

申请号：DE3114834

申请日：1981-04-11

Applicant: IBM DEUTSCHLAND

Inventor： BOHG ARMIN DIPL PHYS ,  HARTMANN KURT

IPC: H02K33/02 ,  B41J9/133 ,  B41J9/38 ,  H01F7/08

Abstract: An electromagnet consists of two essentially symmetrically designed magnetizable E-shaped yoke halves each embraced by a coil. The facing pole ends of the yoke halves form three aligned operating gaps. Between the operating gaps a tongue-shaped ram is arranged which is shiftable in the direction of the line of alignment of the operating gaps. The cross-section of the ram is adapted to the area of the operating gaps. The ram comprises cuboid-shaped armature bars of magnetizable material. The armature bars are geometrically designed in such a manner that their volume is on the order of magnitude of the operating gap volume. In the original position of the ram the armature bars are essentially positioned in front of the operating gaps of the electromagnet. Upon excitation of the electromagnet, the armature bars are pulled into its operating gaps, being accelerated in the process. The windings of the coils exciting the yoke halves are essentially positioned between the E-legs of the yoke halves. By transverse connecting means made of the same material as themselves, the armature bars may be connected to form a continuous part. In view of the operation of the actuator, these transverse connecting means do not have the same material thickness as the armature bars, that is, they take the form of narrow connecting strips between the armature bars.

公开(公告)号：DE3018407A1

公开(公告)日：1981-11-19

申请号：DE3018407

申请日：1980-05-14

Applicant: IBM DEUTSCHLAND

Inventor： BOHG ARMIN DIPL PHYS ,  HARTMANN KURT

IPC: H01F7/16 ,  B41J9/127 ,  B41J9/38 ,  H01F7/13 ,  B41J3/16

公开(公告)号：DE2920569A1

公开(公告)日：1980-12-04

申请号：DE2920569

申请日：1979-05-21

Applicant: IBM DEUTSCHLAND

Inventor： HARTMANN KURT ,  BOHG ARMIN DIPL PHYS

IPC: B41J2/425 ,  B41J2/395 ,  B41J3/18

Abstract: Guide for electrodes in a metal paper printer in which V-shaped grooves are formed in monocrystalline silicon by crystallographic etching and the guide is thereafter coated with a glass passivation layer.

公开(公告)号：DE2758150A1

公开(公告)日：1979-06-28

申请号：DE2758150

申请日：1977-12-27

Applicant: IBM DEUTSCHLAND

Inventor： HARTMANN KURT

IPC: B41J2/425 ,  B41J3/16

公开(公告)号：CA1249625A

公开(公告)日：1989-01-31

申请号：CA503282

申请日：1986-03-04

Applicant: IBM

Inventor： BOHG ARMIN ,  FISCHER LUDWIG ,  GANTZ BRUNO ,  HARTMANN KURT ,  WOLFERT GERHARD

IPC: B41J2/275 ,  H01F7/08 ,  H02K33/16

Abstract: ELECTROMAGNETIC ACTUATOR MECHANISM A clapper armature is pulled into an operating gap of an electromagnet having three pole faces. Two pole faces extend along a length of the clapper armature. The third pole face opposes a major surface of the armature. As the armature is initially pulled into the gap by the magnetic flux extending between the two pole faces the armature becomes increasingly attracted to the third pole face.

公开(公告)号：CA1200831A

公开(公告)日：1986-02-18

申请号：CA454198

申请日：1984-05-11

Applicant: IBM

Inventor： BOHG ARMIN ,  HARTMANN KURT ,  MATTHAEI HORST

IPC: H01F7/16 ,  B41J9/133 ,  H01F7/08 ,  H01F7/122 ,  B41J9/38

Abstract: ELECTROMAGNATIC RAM ACTUATOR An electromagnetic ram actuator, in particular for impact printers, comprises at least one pair of substantially symmetrically designed yoke halves with magnetizable yoke legs, wherein the pole ends of the yoke legs facing each other form aligned operating gaps. A tongue-shaped ram is movable between the operating gaps in a direction coinciding with their line of alignment. The ram comprises armature bars of magnetizable material, each of which is associated with one operating gap. The volume of the armature bars is in each case of the order of the operating gap volume. The armature bars, in the original position of the ram, in the non-excited state of the electromagnet, are positioned external to the operating gaps, being pulled into them upon excitation of the electromagnet. The excitation coil of the electromagnet is slipped on to at least one yoke leg such that a substantial part of its windings extends between two adjacent yoke legs. Inside and/or outside the excitation coil there are several adjacent yoke legs of the same yoke half or adjacent yoke halves. (One such arrangement may be conceived of as being the result of yoke legs having been divided.) At constant external dimensions of the yoke halves, an increase in the force acting on the ram is obtained and a constant force permits reducing the overall height of the ram, respectively.

公开(公告)号：CA1159715A

公开(公告)日：1984-01-03

申请号：CA374288

申请日：1981-03-31

Applicant: IBM

Inventor： BOHG ARMIN ,  HARTMANN KURT

IPC: H01F7/16 ,  B41J9/127 ,  B41J9/38 ,  H01F7/13 ,  B41B1/00 ,  H01F3/00

Abstract: This disclosure deals with an electromagnetic ram actuator, the electromagnet of which consists of two symmetrically designed magnetizable 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 geometrically 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