公开(公告)号：US3078022A

公开(公告)日：1963-02-19

申请号：US7704660

申请日：1960-12-20

Applicant: IBM

Inventor： DURBECK ROBERT C ,  AUYANG RAYMOND P

IPC: B21C47/34 ,  B65G15/60 ,  B65H23/24 ,  F16C32/06 ,  F16H7/18 ,  F16H7/20 ,  G11B15/60

CPC classification number: B65H23/24 ,  B21C47/34 ,  B21C47/3475 ,  B65G15/60 ,  B65G2201/06 ,  B65H2406/111 ,  B65H2406/14 ,  F16C32/06 ,  F16H7/18 ,  F16H7/20 ,  G11B15/60 ,  Y10T137/2663

公开(公告)号：US3569785A

公开(公告)日：1971-03-09

申请号：US3569785D

申请日：1968-07-09

Applicant: IBM

Inventor： DURBECK ROBERT C ,  MANTLEY PATRICK E

IPC: G01R21/133 ,  H02H3/40

CPC classification number: H02H3/40 ,  G01R21/133

Abstract: A method of controlling the operation of a breaker in a transmission line by first monitoring the current and if the current exceeds a prescribed limit, measuring a sampling of the voltage on the line when the current is at zero and dividing this value by the maximum current on the line to obtain a first quantity which is added to a second quantity obtained by measuring a sampling of the voltage when the current is at its maximum value and dividing this voltage by the maximum current. The previous calculations will provide a measure of impedance since the voltage when the current is zero is equal to Vm sin phi while the voltage when the current is at maximum is equal to Vm cosine phi and impedance in a rectangular coordinate representation is: z R jX Vm cosine phi /Im + j(Vmsin phi /Im). This apparent impedance is then compared against relay characteristics which are implemented in a programmed general purpose computer and in the event the apparent impedance lies within the relay characteristic zone, the associated breaker is tripped.

公开(公告)号：CA1122138A

公开(公告)日：1982-04-20

申请号：CA337032

申请日：1979-10-04

Applicant: IBM

Inventor： DURBECK ROBERT C ,  ESWARAN KAPALI P

IPC: B41J3/01 ,  B41J3/51 ,  G06K1/12 ,  G06K1/20 ,  G06K15/08 ,  G06K17/00 ,  B41J3/00

Abstract: Composer apparatus is disclosed in which machine readable representations of characters typed on the first part of a page are thereafter typed on a second part of the page. Key stroke signals generated by the typewriter keyboard are stored in a memory prior to being applied to access corresponding type ball positioning signals within a table to print the characters using a conventional type ball on the fir t portion of the page. Thereafter, the conventional type ball is replaced by a special type ball and the key stroke signals stored in the memory are used to access corresponding ones of a different set of type ball positioning signals within a second memory to enable the special type ball to type optically readable binary coded representations of the characters on the second part of the page. Each character is represented by a string of seven bits plus a parity bit which are typed using either a single strike of a group of eight bits on the special type ball or two different strikes using two different groups of four bits on the special type ball.

公开(公告)号：CA724052A

公开(公告)日：1965-12-21

申请号：CA724052D

Applicant: IBM

Inventor： DURBECK ROBERT C ,  AUYANG RAYMOND P