公开(公告)号：CA1149072A

公开(公告)日：1983-06-28

申请号：CA358604

申请日：1980-08-19

Applicant: IBM

Inventor： BAKER GREGORY N ,  GREENE WILLARD B ,  SIEGL LUDWIG R ,  THOMAS DELBERT C JR ,  WEBER CHARLES J ,  ZIMMERMAN LEE T

IPC: B41J2/255 ,  B41J2/245 ,  B41J19/14 ,  G06K15/00 ,  G06K15/10 ,  G06F3/12

Abstract: A printer is provided with facilities for increasing the printing throughput. This involves a partial line turnaround operation. The printer has means to move a form or document past a print line, a ribbon drive assembly, and a print assembly incorporating a plurality of print wires arranged in print head groups, each group comprising a predetermined number of print wires. If, as an example, the print assembly has two, four, six, or eight print heads, each can accommodate eight wires in the embodiment described. The print wires are arranged in a slanted serrated pattern and provision is made herein to insure that the print heads move at least far enough to print their assigned character locations prior to the performance of any turnaround in individual lines being printed. Routine involves the accessing of tables stored in conjunction with a microprocessor, the tables indicating the optimum turnaround situations for the different print head configurations. In addition, an emitter is provided BC9-78-020 in the printer unit which has character emitters, margin emitters and other emitters as well as turnaround emitters that are used in conjunction with the turnaround decision making process to reverse direction of the print head assembly in order to start printing of a new line. BC9-78-020

公开(公告)号：CA1184050A

公开(公告)日：1985-03-19

申请号：CA413243

申请日：1982-10-12

Applicant: IBM

Inventor： DODGEN DAVID F ,  SIEGL LUDWIG R

IPC: G01P3/49 ,  G01P3/46

Abstract: REAL TIME EDDY CURRENT RESPONSIVE HALL EFFECT DEVICE TACHOMETER A real time tachometer is realized in an electromechanical device having a moving member, for example a disk, of nonmagnetic electrically conductive material driven by a suitable moving device, for example a rotating shaft, the velocity of which is to be determined. An assembly of at least one permanent magnet and at least one Hall effect device is arranged for inducing eddy currents in the moving member or rotating disk and measuring them for indicating the relative velocity. The placement and electric interconnection of the Hall effect devices measure the magnetic field provided by the magnet and in an alternate embodiment incorporate compensation for runout and adverse deflection with a rotating disk.

公开(公告)号：CA1012641A

公开(公告)日：1977-06-21

申请号：CA143831

申请日：1972-06-05

Applicant: IBM

Inventor： DARLING RICHARD H ,  SIEGL LUDWIG R

IPC: G11B17/028 ,  G11B17/32 ,  G11B23/00

Abstract: A disc recorder in which the recording medium is carried on a pliant circular sheet which is held in intimate contact, in the active recording area, with a rotating turntable by a pressure differential established by the configuration of a rotating turntable and the operatively positioned pliant disc.