US3842713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aspheric lens generator
Assignee: McDonnell Douglas Corp
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Filing: 1973-06-04
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Granted: 1974-10-22
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Expires: 1993-06-04
Abstract
Abstract Means and method of generating an aspheric surface on a workpiece which is normally supported horizontally and rotated about a vertical axis, wherein a line cutting element is driven so that its cutting edge is moved along a predetermined locus which is maintained in a plane that intersects with the workpiece at a selected angle with respect to horizontal and the cutting edge cuts the workpiece in following the locus whereby a predetermined surface of revolution is generated on the workpiece by the combined motions of the cutting element and the workpiece. A smoothly faired surface of revolution can be obtained by passing the cutting edge locus exactly through a selected point on the vertical rotation axis of the workpiece.
Inventors
- 👤 V Hamilton
- 👤 E Thorburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:22
CPC Classifications
B; B23; B23D; B23D67/00; B24; B24B; B24B13/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303752; Y10T409/303808; Y10T409/304536; Y10T409/305544; Y10T409/305656; Y10T409/305768; Y10T409/306664; Y10T409/30756; Y10T82/00; Y10T82/12; Y10T82/122
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
131 words
A method of generating an aspheric surface of revolution with a line cutting element operating on a blank that is normally supported horizontally and rotated about a vertical axis, which comprises the steps of: driving said cutting element so that its cutting edge is moved along a noncircular locus including at least a predetermined noncircular portion which is maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal; and adjusting said plane to a selected angle with respect to horizontal so that said cutting edge cuts said blank along at least a part of said predetermined noncircular locus portion which is maintained in said plane whereby said aspheric surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
Claim 2
Independent Claim
131 words
A method of generating an aspheric surface of revolution with a line cutting element operating on a blank that is normally supported horizontally and rotated about a vertical axis, which comprises the steps of: driving said cutting element so that its cutting edge is moved along a noncircular locus including at least a predetermined noncircular portion which is maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal; and adjusting said plane to a selected angle with respect to horizontal so that said cutting edge cuts said blank along at least a part of said predetermined noncircular locus portion which is maintained in said plane whereby said aspheric surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
Claim 3
Dependent Claim
35 words
The invention as defined in claim 1 wherein said part of said predetermined noncircular locus portion matches the intersection of said plane and a predetermined aspheric surface of revolution to be generated on said blank.
Claim 4
Dependent Claim
24 words
The invention as defined in claim 2 wherein the normally uppermost point of said predetermined noncircular locus portion is aligned with said vertical axis.
Claim 5
Dependent Claim
44 words
The invention as defined in claim 2 wherein said part of said predetermined noncircular locus portion is a part of a predetermined ellipse locus portion and said predetermined aspheric surface of revolution to be generated on said blank is a conicoid surface of revolution.
Claim 6
Dependent Claim
24 words
The invention as defined in claim 4 wherein the normally uppermost point of said predetermined ellipse locus portion is aligned with said vertical axis.
Claim 7
Dependent Claim
117 words
Means for generating an aspheric surface of revolution on a blank which is normally supported horizontally and rotated about a vertical axis, said generating means comprising: a line cutting element including a cutting edge which can be moved along a noncircular locus having at least a predetermined noncircular portion maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal; and means for driving said cutting element so that its cutting edge cuts said blank along at least a part of said predetermined noncircular locus portion which is maintained in said plane whereby said aspheric surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
Claim 8
Dependent Claim
117 words
Means for generating an aspheric surface of revolution on a blank which is normally supported horizontally and rotated about a vertical axis, said generating means comprising: a line cutting element including a cutting edge which can be moved along a noncircular locus having at least a predetermined noncircular portion maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal; and means for driving said cutting element so that its cutting edge cuts said blank along at least a part of said predetermined noncircular locus portion which is maintained in said plane whereby said aspheric surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
Claim 9
Dependent Claim
130 words
Means for generating a surface of revolution on a blank which is normally supported horizontally and rotated about a vertical axis, said generating means comprising: a line cutting element including a cutting edge which can be moved along a predetermined locus having at least a portion maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal, said cutting element comprising an ellipsograph-actuated cutting tool having a cutting edge which is moved along said predetermined locus; and means for driving said cutting element so that its cutting edge cuts said blank along at least a part of said locus portion which is maintained in said plane whereby said surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
Claim 10
Dependent Claim
130 words
Means for generating a surface of revolution on a blank which is normally supported horizontally and rotated about a vertical axis, said generating means comprising: a line cutting element including a cutting edge which can be moved along a predetermined locus having at least a portion maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal, said cutting element comprising an ellipsograph-actuated cutting tool having a cutting edge which is moved along said predetermined locus; and means for driving said cutting element so that its cutting edge cuts said blank along at least a part of said locus portion which is maintained in said plane whereby said surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
Claim 11
Dependent Claim
34 words
The invention as defined in claim 6 wherein said cutting element Comprises a strip-like cutting tool having a cutting edge which is moved along at least said part of said predetermined noncircular locus portion.
Claim 12
Dependent Claim
36 words
The invention as defined in claim 8 wherein said strip-like tool includes an endless ribbon type cutting blade having a cutting edge which is moved along at least said part of said predetermined noncircular locus portion.
Claim 13
Dependent Claim
166 words
Means for generating a surface of revolution on a blank which is normally supported horizontally and rotated about a vertical axis, said generating means comprising: a line cutting element including a cutting edge which can be moved along a predetermined locus having at least a portion maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal, said cutting element comprising a strip-like cutting tool including an endless ribbon type cutting blade having a cutting edge which is moved along said predetermined locus; means for adjusting said ribbon blade so that its cutting edge is moved along a path which can be varied to conform with different configurations of said predetermined locus; and means for driving said cutting element so that its cutting edge cuts said blank along at least a part of said locus portion which is maintained in said plane whereby said surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
Claim 14
Dependent Claim
166 words
Means for generating a surface of revolution on a blank which is normally supported horizontally and rotated about a vertical axis, said generating means comprising: a line cutting element including a cutting edge which can be moved along a predetermined locus having at least a portion maintained in a plane that intersects with said blank and is angularly adjustable with respect to horizontal, said cutting element comprising a strip-like cutting tool including an endless ribbon type cutting blade having a cutting edge which is moved along said predetermined locus; means for adjusting said ribbon blade so that its cutting edge is moved along a path which can be varied to conform with different configurations of said predetermined locus; and means for driving said cutting element so that its cutting edge cuts said blank along at least a part of said locus portion which is maintained in said plane whereby said surface of revolution can be generated on said blank with rotation thereof about said vertical axis.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |