US3758739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iece apparatus for removing material from an electrically conducting workp
Assignee: US Philips Corp
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Filing: 1972-10-10
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Granted: 1973-09-11
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Expires: 1992-10-10
Abstract
Abstract Spark erosion machine including an electrode holder driven by a motor. A control element in the form of an electromechanical transducer is arranged within the electrode holder, permitting fast fine control of the electrode movement.
Inventors
- 👤 Osenbruggen C Van
- 👤 Jongh J De
- 👤 J Maenhout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:27
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/14; B23H7/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
Apparatus for removing material from an electrically conducting workpiece by means of spark erosion, in which sparks are produced between the workpiece and an electrode, which apparatus includes an electrode holder driven by a motor, characterized in that the electrode holder includes a control element for the electrode in the form of an electromechanical transducer which similarly to the motor is controlled by signal derived from the condition of the spark gap.
Claim 2
Dependent Claim
72 words
Apparatus for removing material from an electrically conducting workpiece by means of spark erosion, in which sparks are produced between the workpiece and an electrode, which apparatus includes an electrode holder driven by a motor, characterized in that the electrode holder includes a control element for the electrode in the form of an electromechanical transducer which similarly to the motor is controlled by signal derived from the condition of the spark gap.
Claim 3
Dependent Claim
55 words
Apparatus as claimed in claim 1, characterized in that the control element is a piezo-electric control element which is clamped at both ends and comprises a plurality of plates made of a piezo-electric material which are provided with electrically conducting coatings and are arranged one above the other in the direction of the electrode movement.
Claim 4
Dependent Claim
26 words
Apparatus as claimed in claim 2, characterized in that a hydraulic amplitude amplifier is provided in the electrode holder between the control element and the electrode.
Claim 5
Dependent Claim
26 words
Apparatus as claimed in claim 1, characterized in that a hydraulic amplitude amplifier is provided in the electrode holder between the control element and the electrode.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |