公开(公告)号：US3553567A

公开(公告)日：1971-01-05

申请号：US3553567D

申请日：1968-12-20

Applicant: CONTINENTAL CAN CO

Inventor： PESCE CARL A ,  GORE ERNEST M ,  TATHAM JAMES P

IPC: B23K11/25 ,  H02H7/00 ,  H03K3/57 ,  H02H7/14 ,  H02J

CPC classification number: B23K11/252 ,  H02H7/00 ,  H03K3/57

Abstract: A SQUARE WAVE POWER SUPPLY USED IN PRESSURE SEAM WELDING OF AN BODIES. PHOTOELECTRIC CELLS DETECT THE PRESENCE AND LOCATION OF CAN BODIES PASSING BETWEEN PRESSURE ROLLER ELECTRODES TO ACTUATE SOLID STATE SWITCHES. A THREE PHASE A.C. SOURCE IS RECTIFIED AND FILTERED TO PRODUCE A SOURCE OF DIRECT CURRENT. AN OUTPUT TRANSFORMER AND A FIRST SCR ARE CONNECTED IN SERIES ACROSS THE DIRECT CURRENT SOURCE. CONNECTION OF THE OUTPUT TRANSFORMER WITH THE DIRECT CURRENT SOURCE IS CONTROLLED BY TWO TIMING CIRCUITS, ONE OF WHICH CONTROLS THE CONDUCTION DURATION OF THE FIRST SCR AND THE SECOND OF WHICH CONTROLS THE BLOCKING DURATION OF THE SCR. CONDUCTION OF THE SCR IS TERMINATED BY A POSITIVE QUENCHING THEREOF THROUGH THE APPLICATION OF A VOLTAGE ACROSS THE SCR GREATER THAN AND IN OPPOSITION TO THE VOLTAGE OUTPUT FROM THE DIRECT CURRENT SOURCE. A SUBSTANTIALLY WELL DEFINED AND CONSISTENT SQUARE WAVE OUTPUT IS PROVIDED BY PULSE-SHAPING CIRCUIT ELEMENTS IN COOPERATION WITH THE OUTPUT TRANSFORMER AND SCR AND BY ESTABLISHMENT OF A PRELIMINARY FLUX LEVEL IN THE OUTPUT TRANSFORMER PRIOR TO THE INITIATION OF AND UPON TERMINATION OF A TRAIN OF SQUARE WAVE OUTPUT CURRENT SIGNALS. AN OVERLOAD TIMING CIRCUIT PROTECTS THE SUPPLY BY TERMINATING THE INPUT THERETO.

公开(公告)号：US3590209A

公开(公告)日：1971-06-29

申请号：US3590209D

申请日：1968-05-03

Applicant: CONTINENTAL CAN CO

Inventor： TATHAM JAMES P

IPC: B23K11/25 ,  B23K11/24

CPC classification number: B23K11/252

Abstract: Control circuitry is disclosed herein for controlling the flow of direct current through a load. The control circuitry includes a switching circuit for selectively switching the current flowing through the load to ON and OFF conditions at a high repetition rate. One embodiment of the control circuitry is particularly adapted for use with, and forms an integral part of, a direct current electrical resistance welding system for welding metallic blanks which are serially passed between cooperating welding electrodes.

公开(公告)号：US3390769A

公开(公告)日：1968-07-02

申请号：US59664666

申请日：1966-11-23

Applicant: CONTINENTAL CAN CO

Inventor： TATHAM JAMES P ,  GORE ERNEST M

IPC: B07C5/34 ,  G01B15/02

CPC classification number: B07C5/3416 ,  G01B15/025 ,  Y10S209/933