US3811230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facet grinding apparatus
Assignee: Individual
•
Filing: 1972-06-16
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Granted: 1974-05-21
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Expires: 1992-06-16
Abstract
Abstract An apparatus for grinding facets in a workpiece has a parallelogram lever arrangement. The workpiece is mounted on one arm of a parallel set of arms of the lever arrangement, while the other arm of the set is pivotally mounted on a stationary support member. Means are provided for selectively adjusting the angular position of the workpiece about its support arm, and further means are provided for selectively adjusting the angular position of the other parallel arm about the pivot on the support member.
Inventors
- 👤 A Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:58
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q16/00; B23Q16/02; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/16
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
148 words
Apparatus for shaping facets in a workpiece comprising a mounting structure; a parallelogram lever arrangement having two sets of parallel movable arms pivotally connected to each other about respective parallel lever pivot axes, one of said sets of arms having first and second arms, said first arm being mounted on said mounting structure pivotably about a first pivot axis substantially parallel to said lever pivot axes; workpiece holding means mounted on said second arm pivotally about a second pivot axis substantially normal to said first pivot axis; first means for fixing the position of said first arm in any selected angular position about said first pivot axis; second means for fixing the position of said workpiece holding means in any selected angular position about said second pivot axis; and shaping means having a shaping face for shaping the workpiece in positions adjusted about said first and second axes.
Claim 2
Dependent Claim
148 words
Apparatus for shaping facets in a workpiece comprising a mounting structure; a parallelogram lever arrangement having two sets of parallel movable arms pivotally connected to each other about respective parallel lever pivot axes, one of said sets of arms having first and second arms, said first arm being mounted on said mounting structure pivotably about a first pivot axis substantially parallel to said lever pivot axes; workpiece holding means mounted on said second arm pivotally about a second pivot axis substantially normal to said first pivot axis; first means for fixing the position of said first arm in any selected angular position about said first pivot axis; second means for fixing the position of said workpiece holding means in any selected angular position about said second pivot axis; and shaping means having a shaping face for shaping the workpiece in positions adjusted about said first and second axes.
Claim 3
Dependent Claim
44 words
An apparatus as defined in claim 1, wherein said first arm has an extended portion which extends beyond a respective lever pivot axis of said first arm, and wherein said extended portion is pivotally mounted on said support member about said first pivot axis.
Claim 4
Dependent Claim
23 words
An apparatus as defined in claim 1, wherein said first pivot axis coincides with the respective lever pivot axis of said first arm.
Claim 5
Dependent Claim
25 words
An apparatus as defined in claim 1, wherein said first point axis is located intermediate the two respective lever pivot axes of said first arm.
Claim 6
Dependent Claim
55 words
An apparatus as defined in claim 1, wherein said second arm has an extended portion which extends beyond a respective lever pivot axis of said second arm, said extended portion being bent towards said first arm to form an angle with a plane passing through the two respective lever pivot axes of said second arm.
Claim 7
Dependent Claim
24 words
An apparatus as defined in claim 5, wherein the angle formed between said extended portion and said plane is between 10* and 80* .
Claim 8
Dependent Claim
18 words
An apparatus as defined in claim 5, wherein said workpiece holding means is mounted on said extended portion.
Claim 9
Dependent Claim
30 words
An apparatus as defined in claim 7, further comprising bearing means on said extended portion for reducing friction during rotation of said workpiece holding means about said second pivot axis.
Claim 10
Dependent Claim
55 words
An apparatus as defined in claim 5, wherein said workpiece holding means is adapted to hold a workpiece, and wherein a plane passing through the lever pivot axes of said second arm and a line passing perpendicularly through said first pivot axis and parallel to the other set of parallel arms intersect within the workpiece.
Claim 11
Dependent Claim
42 words
An apparatus as defined in claim 1, whErein said workpiece holding means is adapted to hold a workpiece, and wherein said second pivot axis and a plane passing through the respective lever pivot axes of said second arm intersect within the workpiece.
Claim 12
Dependent Claim
41 words
An apparatus as defined in claim 1, further comprising a base plate; a rod extending from said base plate and supportingly connected to said stationary mounting structures, said first pivot axis being parallel to a plane defined by said base plate.
Claim 13
Dependent Claim
99 words
An apparatus as defined in claim 11, wherein said workpiece holding means comprises a shaft extending along said second pivot axis, a template firmly mounted on said shaft for sharing the rotation of the latter, and a reference peg adjustably mounted on said base plate for axial movement to a selectable position closer and further from said baseplate, said reference peg having a flat reference surface at the end thereof facing said template for engagement with the latter to thereby prevent movement of said workpiece holding means towards said base plate beyond an amount determined by said reference peg.
Claim 14
Dependent Claim
52 words
An apparatus as defined in claim 1, wherein the other set of said sets of arms has third and fourth parallel arms, said third arm having an extended portion which extends beyond a respective lever pivot axis of said third arm; and further comprising a counter-weight slidably mounted on said extended portion.
Claim 15
Dependent Claim
56 words
An apparatus as defined in claim 13, wherein said fourth arm has an extended portion which extends beyond a respective lever pivot axis of said fourth arm; and further comprising measuring means connected to the last mentioned extended portion for measuring the extent of rotation of said fourth arm about the last mentioned lever pivot axis.
Claim 16
Dependent Claim
53 words
An apparatus as defined in claim 14, wherein said measuring means comprises a pivot on said last mentioned extended portion, a spur gear rotatably mounted on said pivot; and a stationary gear rack extending in a direction substantially normal to that of said shaping face and arranged to mesh with said spur gear.
Claim 17
Dependent Claim
53 words
An apparatus as defined in claim 15, further comprising a rod supported by said stationary mounting structure and extending in a direction substantially parallel to said shaping face, a bushing slidably mounted on said rod, said gear rack being connected to said bushing for sharing the movements of the latter along said rod.
Claim 18
Dependent Claim
38 words
An apparatus as defined in claim 15, wherein said spur gear has a lateral face provided with scale markings, said last mentioned extended portion including pointer means for indicating the extent to which said spur gear has rotated.
Claim 19
Dependent Claim
16 words
An apparatus as defined in claim 1, wherein said first means comprises a locking nut arrangement.
Claim 20
Dependent Claim
67 words
An apparatus as defined in claim 1, wherein said workpiece holding means includes a shaft, and said second means comprises a disc axially mounted on said shaft and having graduated notches in its periphery, and a lever pivotably mounted on said second arm for releasably engaging said disc in one of said notches to prevent rotation of said disc and said shaft about said second pivot axis.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |