FR2027732A1 - - Google Patents

Info

Publication number
FR2027732A1
FR2027732A1 FR6945698A FR6945698A FR2027732A1 FR 2027732 A1 FR2027732 A1 FR 2027732A1 FR 6945698 A FR6945698 A FR 6945698A FR 6945698 A FR6945698 A FR 6945698A FR 2027732 A1 FR2027732 A1 FR 2027732A1
Authority
FR
France
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR6945698A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GKN Group Services Ltd
Original Assignee
GKN Group Services Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GKN Group Services Ltd filed Critical GKN Group Services Ltd
Publication of FR2027732A1 publication Critical patent/FR2027732A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
    • B23H1/024—Detection of, and response to, abnormal gap conditions, e.g. short circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/50—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
FR6945698A 1969-01-03 1969-12-31 Withdrawn FR2027732A1 (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB42569 1969-01-03

Publications (1)

Publication Number Publication Date
FR2027732A1 true FR2027732A1 (zh) 1970-10-02

Family

ID=9704132

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6945698A Withdrawn FR2027732A1 (zh) 1969-01-03 1969-12-31

Country Status (2)

Country Link
DE (1) DE2000143A1 (zh)
FR (1) FR2027732A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009928A1 (en) * 1978-09-26 1980-04-16 National Research Development Corporation Arc monitor for electrical discharge machining

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7008914A (zh) * 1970-06-18 1971-12-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009928A1 (en) * 1978-09-26 1980-04-16 National Research Development Corporation Arc monitor for electrical discharge machining

Also Published As

Publication number Publication date
DE2000143A1 (de) 1970-08-20

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Legal Events

Date Code Title Description
ST Notification of lapse