US3900971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for producing surfaces of optical lenses, for example toric surfaces
Assignee: WILHELM LOH KG
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Filing: 1973-10-01
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Granted: 1975-08-26
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Expires: 1993-10-01
Abstract
Abstract Machine for forming predetermined surfaces, such as toric surfaces on optical lenses. The machine is of a type in which the surfaces are determined by a base cam and by a transverse cam which is caused to move lengthwise of the base cam. The machine further has a frame, a first holder for a rotatable cup-shaped cutting tool, a second holder for the workpiece and coordinating mechanism for producing predetermined relative movement between said holders. The apparatus is particularly characterized in that the coordinating mechanism so controls the holders that the workpiece axis on the tool axis are always in the same plane or parallel planes and the relative movement between the holders comprises movement along axes which are positioned perpendicularly to one another. A device is provided for effecting automatic operation and for obtaining a wide range of adjustability to permit the manufacture of lenses having a wide range of contours, said latter including convex, concave and variable contours.
Inventors
- 👤 Erhard Brueck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:31
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/02; B24B13/04; B24B13/043
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
203 words
A grinding and polishing machine, comprising: a frame; guide means mounted on said frame; first holder means comprising carriage means mounted on said guide means and adapted to move along a first path relative to said frame and quill means mounted on said carriage means for movement along a second path and in a direction perpendicular to the direction of said first path of movement of said carriage means, said first and second paths of movement defining a theoretical plane; second holder means mounted on said frame for pivotal movement above a fixed pivot axis thereon; cup-shaped tool means mounted on one of said quill means and said second holder means, said cup-shaped tool having a rim thereon; workpiece holding means mounted on the other of said quill means and said second holder and adapted to hold a workpiece so that it will engage said rim of said cup-shaped tool means in response to a movement of said carriage means along said first path; and control means for controlling the movement of said quill means and said second holder means and, consequently, said workpiece holding means and said cup-shaped tool in response to said movement of said carriage means along said first path.
Claim 2
Dependent Claim
203 words
A grinding and polishing machine, comprising: a frame; guide means mounted on said frame; first holder means comprising carriage means mounted on said guide means and adapted to move along a first path relative to said frame and quill means mounted on said carriage means for movement along a second path and in a direction perpendicular to the direction of said first path of movement of said carriage means, said first and second paths of movement defining a theoretical plane; second holder means mounted on said frame for pivotal movement above a fixed pivot axis thereon; cup-shaped tool means mounted on one of said quill means and said second holder means, said cup-shaped tool having a rim thereon; workpiece holding means mounted on the other of said quill means and said second holder and adapted to hold a workpiece so that it will engage said rim of said cup-shaped tool means in response to a movement of said carriage means along said first path; and control means for controlling the movement of said quill means and said second holder means and, consequently, said workpiece holding means and said cup-shaped tool in response to said movement of said carriage means along said first path.
Claim 3
Dependent Claim
31 words
A grinding and polishing machine according to claim 1, wherein said cup-shaped tool is mounted on said second holder means and said workpiece holding means is mounted on said quill means.
Claim 4
Dependent Claim
24 words
A grinding and polishing machine according to claim 1, wherein said control means includes control cams and feelers adapted to engage said control cams.
Claim 5
Dependent Claim
39 words
A grinding and polishing machine according to claim 3, wherein said control means for controlling the pivoting movement of said second holder means includes an exchangeable adjusting piece which corresponds to a certain relative position between workpiece and tool.
Claim 6
Dependent Claim
37 words
A grinding and polishing machine according to claim 3, wherein said control means includes control cams for controlling said first and second holders, said control cams being connected to one of said carriage means and said frame.
Claim 7
Dependent Claim
56 words
A grinding and polishing machine according to claim 5, wherein said control means includes feeler means which cooperate with said control cams, said feeler means including signal generating means for transmitting signals to amplifiers which in turn act onto adjusting members for simultaneously adjusting the relative position between said tool means and said workpiece holding means.
Claim 8
Dependent Claim
39 words
A grinding and polishing machine according to claim 1, wherein said quill means includes a longitudinally movable rod which is guided in said carriage means and which is movable perpendicularly to the direction of movement of said carriage means.
Claim 9
Dependent Claim
27 words
A grinding and polishing machine according to claim 7, wherein said control means includes control cams; and wherein said control cams are mounted on said carriage means.
Claim 10
Dependent Claim
43 words
A grinding and polishing machine according to claim 7, wherein said rod has a piston thereon which is movable in an operating cylinder on said carriage means and is adapted to receive pressure medium on both sides thereof to control the movement thereof.
Claim 11
Dependent Claim
103 words
A grinding and polishing machine according to claim 7, wherein said second holder means is fixedly connected to a pivotal shaft which is supported on said frame; and wherein said control means comprises a pair of relatively movable control cams and feelers, said feelers contacting said control cams and adapted to produce a signal in response to a movement of said feelers relative to said control cam, one of said feelers being coupled for controlling the swinging movement through a mechanical gearing to a pivotal shaft so that a rotary position of said pivotal shaft corresponds to a position of said one feeler.
Claim 12
Dependent Claim
48 words
A grinding and polishing machine accorDing to claim 10, wherein said one feeler is fixedly connected to a feeler shaft and being rotatable therewith, a wind-up disk mounted on said feeler shaft and a band fixedly secured to and extending between said pivotal shaft and said wind-up disk.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |