Patent US1950641A successfully refreshed from Google Patents.
US3753384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the adjustment of the working pressure of a tool
Assignee: Individual
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Filing: 1971-10-12
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Granted: 1973-08-21
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Expires: 1991-10-12
Abstract
Abstract A machining tool is attached to a current carrying annular coil which is mounted for axial movements in an associated annular gap of a magnetic circuit, energized by at least one suitable permanent magnet and/or electromagnet. The terminal leads of the coil are connected to a variable current source. In this arrangement the working pressure of the tool against a workpiece may be very accurately regulated by suitable adjustment of the current supplied to the coil from the variable current source.
Inventors
- 👤 O Anfindsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:31
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/04; B23B29/12; B23Q; B23Q5/00; B23Q5/22; B23Q5/28; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T409/00; Y10T409/50; Y10T409/50082; Y10T409/509348; Y10T82/00; Y10T82/25; Y10T82/2531; Y10T82/2541
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A cutting, planing or scribing apparatus with continuously adjustable cutting tool pressure and comprising: a. a magnetic circuit energized by means of at least one permanent magnet and/or electromagnet and comprising an annular gap; b. an annular electric coil axially movably disposed in said gap in the magnetic circuit; c. a variable current source electrically connected to said coil and operative to supply adjustable electric current to the same, and d. a cutting tool attached to the electric coil and operative to engage a suitably disposed workpiece, the tool pressure against the workpiece being determined by the current supplied from the variable current source to the coil.
Claim 2
Dependent Claim
107 words
A cutting, planing or scribing apparatus with continuously adjustable cutting tool pressure and comprising: a. a magnetic circuit energized by means of at least one permanent magnet and/or electromagnet and comprising an annular gap; b. an annular electric coil axially movably disposed in said gap in the magnetic circuit; c. a variable current source electrically connected to said coil and operative to supply adjustable electric current to the same, and d. a cutting tool attached to the electric coil and operative to engage a suitably disposed workpiece, the tool pressure against the workpiece being determined by the current supplied from the variable current source to the coil.
Claim 3
Dependent Claim
43 words
An apparatus as claimed in claim 1, and further comprising a bias spring disposed to balance the weight of the tool and the coil in such a way that these parts are maintained in a predetermined rest position when the coil is currentlesS.
Claim 4
Dependent Claim
39 words
An apparatus as claimed in claim 1, wherein the variable current source is adjusted to effect a reversal of the polarity of the current supplied to the coil, when the machining operation of the tool is to be terminated.
Claim 5
Independent Claim
113 words
A method of continuously adjusting the working pressure of a cutting tool against a workpiece in a machining operation, comprising: providing a magnetic circuit comprising an annular gap, and energizing said circuit by means of at least one permanent magnet and/or electromagnet; interconnecting an annular electric coil axially with said tool; disposing said coil for axial movement in said gap in the magnetic circuit; supplying an adjustable elect1ric current to said coil through a variable current source electrically connected to said coil to thereby axially move said coil in said gap; and applying current to said coil from said variable current source to thereby regulate the pressure of said tool against the workpiece.
Claim 6
Independent Claim
113 words
A method of continuously adjusting the working pressure of a cutting tool against a workpiece in a machining operation, comprising: providing a magnetic circuit comprising an annular gap, and energizing said circuit by means of at least one permanent magnet and/or electromagnet; interconnecting an annular electric coil axially with said tool; disposing said coil for axial movement in said gap in the magnetic circuit; supplying an adjustable elect1ric current to said coil through a variable current source electrically connected to said coil to thereby axially move said coil in said gap; and applying current to said coil from said variable current source to thereby regulate the pressure of said tool against the workpiece.
Claim 7
Dependent Claim
41 words
The method of claim 4 further comprising the step of spring biasing said connected coil and tool for balancing the weight thereof to maintain said coil and tool in a predetermined rest position when said coil is supplied with no current.
Claim 8
Dependent Claim
37 words
The method of claim 4 wherein said variable current source is adjusted to effect a reversal of the polarity of the current supplied to said coil when the machining operation of said tool is to be terminated.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |