公开(公告)号：US3566197A

公开(公告)日：1971-02-23

申请号：US3566197D

申请日：1968-10-28

Applicant: ASEA AB

Inventor： NILSSON ERLAND ,  SCHEI ASLE

IPC: H01T4/10 ,  H01T4/16 ,  H02H3/20 ,  H02H7/085 ,  H02H7/24 ,  H02H9/06 ,  H02H3/22

CPC classification number: H02H7/085 ,  H01T4/16 ,  H02H9/06

Abstract: An overvoltage protection device consists of a number of parallel connected columns containing nonlinear resistance stacks between upper and lower spark gap stacks. The spark gap stacks provide arc extension by magnetic effect. Cross-impedances are arranged between the columns for transferring ignition pulses. The spark gaps, nonlinear resistors and connecting members for the cross-impedances are so dimensioned and arranged that the impedance increase of a column after ignition in comparison with the impedance increase of one or more subsequent ignited columns is so great that the current through the first column is less than a value corresponding to its lowest current carrying voltage. The cross-impedances may be connected between the bottom of an upper spark gap stack and the top of a lower spark gap stack.

公开(公告)号：US3562033A

公开(公告)日：1971-02-09

申请号：US3562033D

申请日：1968-02-12

Applicant: ASEA AB

Inventor： JANSEN JURI ,  RYMAN LENNART

IPC: C30B31/06 ,  H01L21/00 ,  H01L21/223 ,  H01L7/36 ,  H01L7/44

CPC classification number: H01L21/00 ,  C30B31/06 ,  H01L21/223 ,  Y10S252/951 ,  Y10S438/909

Abstract: METHOD OF DIFFUSING A DOPING SUBSTANCE FROM GROUP III OF THE PERIODIC SYSTEM INTO SILICON DISCS FOR SEMI-CONDUCTOR DEVICES, IN WHICH THE SILICON DISCS ARE SUBJECTED BOTH TO THE ACTION OF VAPOR FROM THE DOPING SUBSTANCE AND TO THE ACTION OF A HALOGEN.

公开(公告)号：US3560816A

公开(公告)日：1971-02-02

申请号：US3560816D

申请日：1968-10-14

Applicant: ASEA AB

Inventor： FRANZEN SIGFRID

IPC: B60L11/04 ,  H02P7/70

CPC classification number: B60L11/04 ,  B60L2200/26 ,  Y02T10/646 ,  Y02T10/648 ,  Y02T10/70 ,  Y02T10/7077

Abstract: An electrical traction system with parallel-connected groups of series motors is provided with means for switching over to a condition with a constant number of field ampere turns when maximal adhesion is desired.

公开(公告)号：US3551578A

公开(公告)日：1970-12-29

申请号：US3551578D

申请日：1969-08-07

Applicant: ASEA AB

Inventor： HAMMARLUND PER ERIK ,  FREDRIKSON BENGT

IPC: H05B6/20 ,  H05B6/34

CPC classification number: H05B6/20 ,  H05B6/34

公开(公告)号：US3542985A

公开(公告)日：1970-11-24

申请号：US3542985D

申请日：1968-01-25

Applicant: ASEA AB

Inventor： MADSEN KRISTIAN DAHL

IPC: H01H33/00 ,  H01H33/14 ,  H01H33/18 ,  H01H33/59 ,  H01H33/68 ,  H01H9/44

CPC classification number: H01H33/14 ,  H01H33/002 ,  H01H33/18 ,  H01H33/596 ,  H01H33/68

公开(公告)号：US3531965A

公开(公告)日：1970-10-06

申请号：US3531965D

申请日：1968-09-30

Applicant: ASEA AB

Inventor： NILSSON JAN

IPC: B21C23/00 ,  B21C23/08

CPC classification number: B21C23/007

公开(公告)号：US3528269A

公开(公告)日：1970-09-15

申请号：US3528269D

申请日：1968-02-29

Applicant: ASEA AB

Inventor： NILSSON JAN

IPC: B21C23/00 ,  B21C23/08

CPC classification number: B21C23/007

公开(公告)号：US3526287A

公开(公告)日：1970-09-01

申请号：US3526287D

申请日：1968-02-13

Applicant: ASEA AB

Inventor： FLINTH RUNE

IPC: G01G19/02 ,  G01G3/14

CPC classification number: G01G19/028

公开(公告)号：US3513681A

公开(公告)日：1970-05-26

申请号：US3513681D

申请日：1967-10-13

Applicant: ASEA AB

Inventor： MONESTAM ESKIL

IPC: B21C27/00 ,  B21C35/02

CPC classification number: B21C27/00 ,  B21C35/02

公开(公告)号：US3511071A

公开(公告)日：1970-05-12

申请号：US3511071D

申请日：1967-10-23

Applicant: ASEA AB

Inventor： IKAHEIMO AIMO ,  LANDA TORSTEIN

IPC: B21C23/00 ,  B21C23/21

CPC classification number: B21C23/007