Patent US3752950A successfully refreshed from Google Patents.
US3752950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for slotting a clamping bushing by edm
Assignee: ASTRATRONICS Inc
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Filing: 1971-03-15
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Granted: 1973-08-14
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Expires: 1991-03-15
Abstract
Abstract This invention has to do with an apparatus for slotting and a clamping bushing manufactured with such apparatus and, more particularly, to a machine using the E.D.M. process for slotting workpieces and the slotted work clamping bushing or collet manufactured on said apparatus. The apparatus has a wire electrode which is moved between two rolls, and has a workholder which is relatively movable linearly toward and away from the electrode and rotatable about an axis passing through the electrode. Cam means is provided to synchronize the two modes of motion. The bushing is formed of a right circular cylindrical tube, the sides of which are slotted. The slots are at some points parallel and at some points skewed to the generatrices.
Inventors
- 👤 L Castonguay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:11
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
An apparatus for slotting, comprising a. an elongated flexible elecTrode, b. a first roll on which the electrode is wound and from which the electrode passes, c. a second roll to which the electrode passes for winding thereon, d. a fixture for holding a workpiece in the path of the electrode as it passes from the first roll to the second roll, so that the workpiece may be rotated about an axis which intersects the electrode, e. means connecting the electrode and the workpiece to electrical source of opposite polarity, f. means immersing the workpiece and electrode in working fluid for electric discharge machining, g. means for moving the workpiece and the electrode toward one another, and h. means for rotating the workpiece as a function of of the distance between the workpiece and the electrode; i. said first roll and said second roll being mounted on a vertically movable toolhead.
Claim 2
Independent Claim
151 words
An apparatus for slotting, comprising a. an elongated flexible elecTrode, b. a first roll on which the electrode is wound and from which the electrode passes, c. a second roll to which the electrode passes for winding thereon, d. a fixture for holding a workpiece in the path of the electrode as it passes from the first roll to the second roll, so that the workpiece may be rotated about an axis which intersects the electrode, e. means connecting the electrode and the workpiece to electrical source of opposite polarity, f. means immersing the workpiece and electrode in working fluid for electric discharge machining, g. means for moving the workpiece and the electrode toward one another, and h. means for rotating the workpiece as a function of of the distance between the workpiece and the electrode; i. said first roll and said second roll being mounted on a vertically movable toolhead.
Claim 3
Dependent Claim
42 words
Apparatus as recited in claim 1, wherein the fixture is mounted on a fixed base, and wherein a cam is mounted on the toolhead and engages the fixture to provide the predetermined pattern of movement of the workpiece relative to the electrode.
Claim 4
Dependent Claim
69 words
Apparatus as recited in claim 2, wherein a first protuberance is provided extending from the base, a second protuberance is provided extending from the fixture, means is provided to bias the first protuberance away from the second protuberance and the various elements being positioned so that the cam moves the second protuberance with respect to the second protuberance and the workpiece and electrode are moved relative to one another.
Claim 5
Dependent Claim
24 words
Apparatus as recited in claim 1, wherein means are provided to move the electrode at constant linear velocity from one roll to the other.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |