公开(公告)号：US3465958A

公开(公告)日：1969-09-09

申请号：US3465958D

申请日：1967-09-07

Applicant: IBM

Inventor： GUNDERSON PAUL E ,  KULTERMAN ROBERT W ,  STOCKDALE NORMAN S

IPC: G06K13/077 ,  G06K1/02 ,  G06K1/06 ,  G06K1/08 ,  G06K1/05 ,  B26D5/20 ,  B26F1/04

CPC classification number: G06K1/02 ,  G06K1/06 ,  Y10T83/444 ,  Y10T83/4625 ,  Y10T83/8765

公开(公告)号：CA1136198A

公开(公告)日：1982-11-23

申请号：CA347658

申请日：1980-03-14

Applicant: IBM

Inventor： KULTERMAN ROBERT W ,  LISINSKI JOSEPH E

IPC: B41J2/285 ,  B41J9/38 ,  H01F7/122 ,  H01F7/16 ,  B41J9/02 ,  H01F7/06

Abstract: print wire actuator for use in a dot matrix printer has an armature, connected to the print wire, driven in a forward direction by energizing an electromagnet and driven in the reverse direction to its initial position by a permanent magnet. Both the electromagnet and the permanent magnet are in the shape of hollow cylinders and are aligned with respect to one another. The armature is inserted in the center of the two aligned magnets so that a portion of the armature is adjacent to the permanent magnet and another portion of the armature is adjacent to the electromagnet. Stop means are also inserted into the center portions of the magnets to control the movement of the armature. BC9-78-008

公开(公告)号：CA1023825A

公开(公告)日：1978-01-03

申请号：CA214900

申请日：1974-11-27

Applicant: IBM

Inventor： KULTERMAN ROBERT W

IPC: G01D5/245 ,  G01B7/00 ,  G01D5/20 ,  G01D5/22

Abstract: An improved radio frequency transformer apparatus for detecting positional changes between a moving and a fixed element is disclosed. The system operates in the high frequency range (on the order of 5 megahertz) and utilizes a centered tapped pickup coil in conjunction with an elongated primary serpentine coil for detecting the null points in a signal which is inductively coupled to the pickup coil as it passes along the elongated serpentine transmitter coil or primary. The use of the null point as the sensing or trigger point simplifies the circuitry required and reduces the cost involved in building the position detecting transformer. The use of the high frequency signals reduces the size and complexity of circuits and circuit elements and enables the entire primary oscillator and detector amplifiers to be embodied in integrated circuit chips for positioning directly on circuit board apparatus. In addition, this design allows a fairly wide variation in spacing tolerance between the transmitter and the detector coils without inducing positional error indications between the moving and fixed elements. This further reduces the cost by lowering the precision required in constructing the device.