US3878742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Numerically controlled lathes
Assignee: Index Werke GmbH and Co KG Hahn and Tessky
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Filing: 1973-11-29
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Granted: 1975-04-22
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Expires: 1993-11-29
Abstract
Abstract A numerically controlled lathe having a spindle for holding a workpiece and a carriage for holding a tool comprising compound slides movable in longitudinal and transverse axes. The spindle is connected to the numerical control system so that its rotation is selectively obtained at predetermined indexes or angles corresponding to the path of movement normal for the tool carriage, in one direction, while the carriage itself is held stationary in that direction.
Inventors
- 👤 Heinrich Lahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:46
CPC Classifications
B; B23; B23B; B23B3/00; B23B3/16; B23B3/161; B23B3/162; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/20; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/182; G05B19/186; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41255; G05B2219/41358; G05B2219/42; G05B2219/42186; Y; Y10; Y10T; Y10T82/00; Y10T82/10; Y10T82/20; Y10T82/25; Y10T82/2502
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A numerically controlled lathe having a rotatable spindle for holding a workpiece, a carriage for holding the tool in operation with said spindle, said carriage comprising a compound slide having a longitudinal slide member and a cross slide member movable respectively along axes parallel and transverse to the axis of said spindle, means for independently driving each of said slide members, and a numerical control system providing a predetermined program for each axis to control the means for respectively driving said slide members, drive means for rotating said spindle, means for diverting the predetermined program for controlling the means for driving one of said slide members to said means for driving said spindle to control said means for driving said spindle in accordance with said predetermined program, said spindle rotation being thereby controlled by the predetermined program for driving said carriage in one axis in synchronism with the movement of the carriage in the other axis while said carriage is held stationary against movement in the one axis.
Claim 2
Dependent Claim
168 words
A numerically controlled lathe having a rotatable spindle for holding a workpiece, a carriage for holding the tool in operation with said spindle, said carriage comprising a compound slide having a longitudinal slide member and a cross slide member movable respectively along axes parallel and transverse to the axis of said spindle, means for independently driving each of said slide members, and a numerical control system providing a predetermined program for each axis to control the means for respectively driving said slide members, drive means for rotating said spindle, means for diverting the predetermined program for controlling the means for driving one of said slide members to said means for driving said spindle to control said means for driving said spindle in accordance with said predetermined program, said spindle rotation being thereby controlled by the predetermined program for driving said carriage in one axis in synchronism with the movement of the carriage in the other axis while said carriage is held stationary against movement in the one axis.
Claim 3
Dependent Claim
168 words
A numerically controlled lathe having a rotatable spindle for holding a workpiece, a carriage for holding the tool in operation with said spindle, said carriage comprising a compound slide having a longitudinal slide member and a cross slide member movable respectively along axes parallel and transverse to the axis of said spindle, means for independently driving each of said slide members, and a numerical control system providing a predetermined program for each axis to control the means for respectively driving said slide members, drive means for rotating said spindle, means for diverting the predetermined program for controlling the means for driving one of said slide members to said means for driving said spindle to control said means for driving said spindle in accordance with said predetermined program, said spindle rotation being thereby controlled by the predetermined program for driving said carriage in one axis in synchronism with the movement of the carriage in the other axis while said carriage is held stationary against movement in the one axis.
Claim 4
Dependent Claim
168 words
A numerically controlled lathe having a rotatable spindle for holding a workpiece, a carriage for holding the tool in operation with said spindle, said carriage comprising a compound slide having a longitudinal slide member and a cross slide member movable respectively along axes parallel and transverse to the axis of said spindle, means for independently driving each of said slide members, and a numerical control system providing a predetermined program for each axis to control the means for respectively driving said slide members, drive means for rotating said spindle, means for diverting the predetermined program for controlling the means for driving one of said slide members to said means for driving said spindle to control said means for driving said spindle in accordance with said predetermined program, said spindle rotation being thereby controlled by the predetermined program for driving said carriage in one axis in synchronism with the movement of the carriage in the other axis while said carriage is held stationary against movement in the one axis.
Claim 5
Dependent Claim
147 words
The lathe according to claim 1 wherein said means for driving said slide members includes a pair of motor means for respectively driving each of said longitudinal and cross slide members and said numerical control system includes actuating means coupled to each of said motor means for providing a signal to operate each of said motor means and drive means for rotating said spindle includes a first and second motor and means for selectively coupling one of said first and second means for driving said spindle to said spindle, said first means for driving said spindle being operable independently of the movement of said carriage, and switch means interposed between said coupled actuating means and at least one of said motor means and second means for driving said spindle to selectively feed said signal to either said motor means or said second means for driving said spindle.
Claim 6
Dependent Claim
52 words
The lathe according to claim 2 wherein said switch means is interposed between the actuating means and the motor means for the cross slide and said means for driving said spindle whereby the carriage may be held stationary in the transverse axis and the spindle rotated with respect to said longitudinal axis.
Claim 7
Dependent Claim
49 words
The lathe according to claim 2 wherein said means for driving said spindle comprises a primary motor, an auxiliary motor and transmission means selectively interconnecting said spindle to one of said primary and auxiliary motors, said auxiliary motor being connected via said switch means to said coupled actuating means.
Claim 8
Dependent Claim
42 words
The lathe according to claim 2 including means for sensing the movement of each of said longitudinal and cross slides and said spindle, said sensorS producing a signal indicative of said movement and means returning said signal to said numerical control system.
Claim 9
Dependent Claim
27 words
The lathe according to claim 5 wherein said means for moving said carriage and said spindle comprise respectively rotary motors, and said sensors comprise angular position detectors.
Claim 10
Dependent Claim
25 words
The lathe according to claim 6 wherein said motor for driving said spindle has a speed different from that of the motors driving said carriage.
Claim 11
Dependent Claim
15 words
The lathe according to claim 6 wherein said motors have means for varying their speed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |