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Patent US4463298A successfully refreshed from Google Patents.
US4463298A
Expired / Lapsed
US
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Instrument for keeping the distance constant between a tool and a workpiece to be processed
Assignee: Messer Griesheim GmbH
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Filing: 1981-07-15
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Granted: 1984-07-31
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Expires: 2001-07-15
Abstract
Abstract An instrument for maintaining a constant distance between a tool, such as a cutting torch, and a workpiece includes a sensing electrode connected to two different phase control system-building blocks one of which functions as an oscillator having its output connected to the input of the other phase control system-building block.
Inventors
- 👤 Klaus Halbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:06
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/10; B23K7/102; B23Q; B23Q15/00; B23Q15/20; B23Q15/22; B23Q15/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
In an instrument for maintaining a constant distance between a tool and a workpiece to be processed wherein the instrument has a distance change-detection capacitor formed by a sensing electrode and by the workpiece surface and which is connected to a first phase control system-building block with an incorporated set point-actual value comparing device and tool adjusting device, the improvement being said sensing electrode being connected to a second phase control system-building block which functions as an oscillator, and the output of said second phase control system-building block being connected to the input of the first phase control system-building block whereby a temperature-independent height adjustment is achieved by a single capacitor formed by said electrode and the workpiece.
Claim 2
Dependent Claim
118 words
In an instrument for maintaining a constant distance between a tool and a workpiece to be processed wherein the instrument has a distance change-detection capacitor formed by a sensing electrode and by the workpiece surface and which is connected to a first phase control system-building block with an incorporated set point-actual value comparing device and tool adjusting device, the improvement being said sensing electrode being connected to a second phase control system-building block which functions as an oscillator, and the output of said second phase control system-building block being connected to the input of the first phase control system-building block whereby a temperature-independent height adjustment is achieved by a single capacitor formed by said electrode and the workpiece.
Claim 3
Dependent Claim
29 words
In the instrument of claim 1, in combination therewith, said tool being a cutting torch of a flame cutting machine, and said sensing electrode being connected to said torch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |