US3869946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reproduction lathe
Assignee: Renault SA
•
Filing: 1974-01-10
•
Granted: 1975-03-11
•
Expires: 1994-01-10
Abstract
Abstract A reproduction lathe for the manufacture of articles by means of a tool having associated therewith a sensing device to be guided by means of a reproduction template includes a framework upon which are mounted two rotating parallel spindles carrying respectively the article for manufacture and the reproduction template, a machine carriage including a sheath which surrounds the spindle associated with the reproduction template and which is translatable along its axis and rotatable about such axis. The apparatus can be provided with more than one tool, each of which can be disposed perpendicularly to a plane which includes the spindle axis, for accomplishing different machining operations, and membranes are provided through which the tool members are perpendicularly fixed, laterally supported, and axially guided relative to the sheath while protecting the template from chips and shavings generated as a result of the machining process. Means are also provided for adjusting the relative axes of the article to be machined and the template.
Inventors
- 👤 Jean-Pierre Vignaud
- 👤 Bernard Leguy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:35
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/109; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/141
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
156 words
Reproduction lathe for the machining of articles by tool means having associated therewith sensing means for engaging a reproduction template comprising: a framework upon which are rotatably mounted two parallel spindles for respectively carrying said article to be machined and said reproduction template; a machining sheath carriage disposed about said template spindle, which is translatably movable along and rotatably movable about its longitudinal axis; at least one support means detachably mounted upon said sheath so as to extend perpendicular to the axes of said spindles; and tool means disposed exteriorly of said sheath and sensing means disposed interiorly of said sheath, said tool and sensing means being secured to said support means at opposite ends thereof, whereby said tool means is simultaneously moved in accordance with the translatable movement of said sheath and the relative oscillating movement resulting from the action of said reproduction template upon said sensing means with which said sensing means is engaged.
Claim 2
Dependent Claim
156 words
Reproduction lathe for the machining of articles by tool means having associated therewith sensing means for engaging a reproduction template comprising: a framework upon which are rotatably mounted two parallel spindles for respectively carrying said article to be machined and said reproduction template; a machining sheath carriage disposed about said template spindle, which is translatably movable along and rotatably movable about its longitudinal axis; at least one support means detachably mounted upon said sheath so as to extend perpendicular to the axes of said spindles; and tool means disposed exteriorly of said sheath and sensing means disposed interiorly of said sheath, said tool and sensing means being secured to said support means at opposite ends thereof, whereby said tool means is simultaneously moved in accordance with the translatable movement of said sheath and the relative oscillating movement resulting from the action of said reproduction template upon said sensing means with which said sensing means is engaged.
Claim 3
Dependent Claim
156 words
Reproduction lathe for the machining of articles by tool means having associated therewith sensing means for engaging a reproduction template comprising: a framework upon which are rotatably mounted two parallel spindles for respectively carrying said article to be machined and said reproduction template; a machining sheath carriage disposed about said template spindle, which is translatably movable along and rotatably movable about its longitudinal axis; at least one support means detachably mounted upon said sheath so as to extend perpendicular to the axes of said spindles; and tool means disposed exteriorly of said sheath and sensing means disposed interiorly of said sheath, said tool and sensing means being secured to said support means at opposite ends thereof, whereby said tool means is simultaneously moved in accordance with the translatable movement of said sheath and the relative oscillating movement resulting from the action of said reproduction template upon said sensing means with which said sensing means is engaged.
Claim 4
Dependent Claim
156 words
Reproduction lathe for the machining of articles by tool means having associated therewith sensing means for engaging a reproduction template comprising: a framework upon which are rotatably mounted two parallel spindles for respectively carrying said article to be machined and said reproduction template; a machining sheath carriage disposed about said template spindle, which is translatably movable along and rotatably movable about its longitudinal axis; at least one support means detachably mounted upon said sheath so as to extend perpendicular to the axes of said spindles; and tool means disposed exteriorly of said sheath and sensing means disposed interiorly of said sheath, said tool and sensing means being secured to said support means at opposite ends thereof, whereby said tool means is simultaneously moved in accordance with the translatable movement of said sheath and the relative oscillating movement resulting from the action of said reproduction template upon said sensing means with which said sensing means is engaged.
Claim 5
Dependent Claim
101 words
Reproduction lathe according to claim 1, wherein: said tool and said sensing means are connected by means of a rod; at least one elastic member interposed between said rod and said support means for supporting said rod relative to said support means and for permitting deflection or movement of said rod only in a direction perpendicular to said spindles; and spring means being interposed between said support means and a portion of said rod for biasing said rod and said sensing means in said direction perpendicular to said spindles so as to maintain said sensing means in contact with said template.
Claim 6
Dependent Claim
38 words
Reproduction lathe according to claim 2 wherein said elastic member defines an enclosed area containing a lubricating medium whereby said lathe components and sensing means disposed within said area are able to be maintained within said lubricating medium.
Claim 7
Dependent Claim
14 words
Reporduction lathe according to claim 2 wherein said elastic member comprises a metallic membrane.
Claim 8
Dependent Claim
40 words
Reproduction lathe according to claim 2 wherein said rod carrying said tool means and said sensing means is guided at one end thereof by means of a guide block and the other end thereof is secured to said elastic member.
Claim 9
Dependent Claim
36 words
Reproduction lathe according to claim 2 wherein two tools for semi-finishing and finishing operations respectively, are mounted at one extremity of said rod while said sensing means is carried at the other extremity of said rod.
Claim 10
Dependent Claim
35 words
Reproduction lathe according to claim 2 wherein said sensing means is mounted upon a lever secured to said support means, the position of said sensing means being angularly displaced from the axis of said rod.
Claim 11
Dependent Claim
43 words
Reproduction lathe according to claim 1 wherein a plurality of support means respectively supporting machining tools are angularly disposed about and supported upon said machining sheath whereby rotation of said sheath each of said tools may be selectively moved to a working position.
Claim 12
Dependent Claim
63 words
Reproduction lathe according to claim 1 wherein said machining sheath is secured upon a fixed sheath surrounding said template spindle and is slidably movable upon said fixed sheath through means of a nut and bolt assembly which is rotatably driven by means of a motor, whereby said carriage sheath may be raised or lowered so as to facilitate performance of the maching operations.
Claim 13
Dependent Claim
44 words
Reproduction lathe according to claim 9 wherein said machining sheath further includes at least one key groove within which there is engAged a pivoting crown driven by means of a motor, whereby said machining sheath may be angularly displaced relative to said fixed sheath.
Claim 14
Dependent Claim
33 words
Reproduction lathe according to claim 1 wherein said spindle associated with said article to be machined is eccentically mounted within a sheath which includes means rotatably mounting the same upon the apparatus framework.
Claim 15
Dependent Claim
43 words
Reproduction lathe according to claim 11 wherein said rotatably mounted sheath is secured within an eccentric bushing; whereupon rotation of said bushing permits variations in the angle of the axis of said spindle carrying holder relative to the axis of said template spindle.
Claim 16
Dependent Claim
92 words
Reproduction lathe according to claim 12 wherein said means for rotatably mounting said spindle sheath includes: rotatably driven screw means associated with an end fitting secured to one portion of said sheath for rotating said sheath in a counterclockwise direction, and spring biasing means associated with a portion of said sheath diametrically opposite said end fitting tending to rotate said sheath in a clockwise direction whereby said sheath may be rotated by said driven means against the biasing action of said spring means so as to adjust the spacing between said spindles.
Claim 17
Dependent Claim
33 words
Reproduction lathe according to claim 13 wherein said apparatus further includes piston means connected to said rotatably driven screw means and said sheath; whereby the rapid angular displacement of said sheath is facilitated.
Claim 18
Dependent Claim
16 words
Reproduction lathe according to claim 14 wherein said rotatably driven screw means comprises a screw jack.
Claim 19
Dependent Claim
39 words
Reproduction lathe according to claim 14 wherein said rotatably driven screws means further includes pinion means secured thereon for engaging another pinion secured upon the driven shaft of a motor; whereby the spacing between said spindles may be altered.
Claim 20
Dependent Claim
38 words
Reproduction lathe according to claim 16, wherein said rotatably driven screw means has associated therewith angular displacement indicating means whereby actuation of said motor, automatic correction in accordance with the desired dimensions of the articles may be facilitated.
Claim 21
Dependent Claim
24 words
Reproduction lathe according to claim 1 wherein said apparatus further includes pulley and belt means associated with a drive motor for rotating said spindles.
Claim 22
Dependent Claim
40 words
Reproduction lathe according to claim 1 wherein said tool means are rigidly secured upon said sheath so as to effect machining by a slow stroke operation of said tools as a result of the slow rotatable movement of said sheath.
Claim 23
Dependent Claim
44 words
Reproduction lathe according to claim 1 wherein said apparatus framework has a C-shaped cross-section which is capable of being assembled in a side-by-side relationship with other similarly configured lathes so as to form a multi-spindle machine for accomplishing lathing operations under mass production conditions.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |