公开(公告)号：US3324276A

公开(公告)日：1967-06-06

申请号：US27307863

申请日：1963-04-15

Applicant: PHILIPS CORP

Inventor： OSENBRUGGEN CORNELIS VAN ,  DORSTEN ADRIANUS CORNELIS VAN

IPC: B23H9/06

CPC classification number: B23H9/06 ,  Y10T29/49004

公开(公告)号：US3627966A

公开(公告)日：1971-12-14

申请号：US3627966D

申请日：1970-03-27

Applicant: PHILIPS CORP

Inventor： OSENBRUGGEN CORNELIS VAN ,  LUIMES GERRIT ,  DIJK ATE VAN

IPC: B23H1/02 ,  B23K9/16

CPC classification number: B23H1/022

Abstract: A spark erosion device including a storage capacitor which is periodically discharged across the gap between the electrode and workpiece. The improvement concerns means for limiting the duration of the arc discharge phase of the operation comprising, a source of constant current for charging the capacitor, means for disconnecting the current source from the capacitor when the gap breakdown voltage is reached, and the addition of an inductor in the capacitor discharge circuit to provide a resonant effect to limit the arc time across the gap.

公开(公告)号：US3610865A

公开(公告)日：1971-10-05

申请号：US3610865D

申请日：1969-06-09

Applicant: PHILIPS CORP

Inventor： OSENBRUGGEN CORNELIS VAN

IPC: B23H9/06 ,  B23K9/16

CPC classification number: B23H9/06

Abstract: An electric discharge machining apparatus utilizing a piezoelectric element having two metal coatings which form a capacitor. A voltage is applied to the coatings which causes the piezoelectric element to oscillate, and by controlling the current to the piezoelectric element, the gap distance can be varied. The oscillation frequency is determined by the current supplied and the gap discharge rate.

公开(公告)号：US3335313A

公开(公告)日：1967-08-08

申请号：US33487963

申请日：1963-12-31

Applicant: PHILIPS CORP

Inventor： GERRIT LUIMES ,  OSENBRUGGEN CORNELIS VAN

IPC: B23H7/18 ,  B23H7/32

CPC classification number: B23H7/32 ,  B23H7/18