US3916574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens surfacing apparatus
Assignee: Aearo Technologies LLC
•
Filing: 1974-11-29
•
Granted: 1975-11-04
•
Expires: 1994-11-29
Abstract
Abstract A lens surfacing machine having a rotatable lower tool supporting spindle and an oscillational work actuating head of minimal mass and weight. Vibration dampeners reducing noise, wear and lens breakage are incorporated in the tool and work actuating components of the machine. A motor driven compound motion imparting system, protected from abrasive contamination, produces oscillation of the work actuating head with a continuous break up of the oscillatory motion and simultaneous rotation of the tool supporting spindle.
Inventors
- 👤 Louis Prunier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:12
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
In lens surfacing apparatus including a rotatable tool supporting structure, means for rotating said structure, work harnessing means rotatable with said tool supporting structure and a workpiece actuating head having a drive pin, the improvement comprising: means for fixedly mounting said drive pin in said head; a tool holder in said tool supporting structure; a drive unit remote from said head for producing a compound cranking motion and means for actuating said unit; rocker means interconnecting said drive unit and head for effecting conversion of said compound cranking motion into a compound oscillational motion and for oscillAting said head accordingly when said drive unit is actuated; whereby rotation of said tool supporting structure and work harness with simultaneous actuation of said drive unit produces a surfacing motion between a workpiece in said harnessing means and a tool on said tool supporting structure which surfacing motion includes oscillation of said workpiece over said tool with a continuous breakup of its oscillational movement.
Claim 2
Dependent Claim
161 words
In lens surfacing apparatus including a rotatable tool supporting structure, means for rotating said structure, work harnessing means rotatable with said tool supporting structure and a workpiece actuating head having a drive pin, the improvement comprising: means for fixedly mounting said drive pin in said head; a tool holder in said tool supporting structure; a drive unit remote from said head for producing a compound cranking motion and means for actuating said unit; rocker means interconnecting said drive unit and head for effecting conversion of said compound cranking motion into a compound oscillational motion and for oscillAting said head accordingly when said drive unit is actuated; whereby rotation of said tool supporting structure and work harness with simultaneous actuation of said drive unit produces a surfacing motion between a workpiece in said harnessing means and a tool on said tool supporting structure which surfacing motion includes oscillation of said workpiece over said tool with a continuous breakup of its oscillational movement.
Claim 3
Dependent Claim
63 words
Apparatus according to claim 1 wherein said means for fixedly mounting said drive pin in said head includes a rod to one end of which said drive pin is immovably attached, said rod extending through and depending from a forward portion of said head; and an immovable but vibration dampening bushing surrounding at least a substantial portion of said rod in said head.
Claim 4
Dependent Claim
30 words
The lens surfacing apparatus according to claim 2 wherein said bushing is externally and internally surrounded by metallic sleeves and the material of said bushing is attached to said sleeves.
Claim 5
Dependent Claim
20 words
The apparatus according to claim 3 wherein said bushing is formed of hard rubber and is vulcanized to said sleeves.
Claim 6
Dependent Claim
20 words
The apparatus according to claim 1 wherein said tool holder includes an annular tool receiving seat formed of resilient material.
Claim 7
Dependent Claim
118 words
Lens surfacing apparatus according to claim 1 wherein said drive unit comprises a main housing, a hollow shaft journaled to rotate concentrically within said housing, means for rotating said hollow shaft, said shaft having an eccentrically disposed opening extending longitudinally therethrough, a second shaft journaled in said eccentric opening of said hollow shaft, opposite ends of said second shaft extending outwardly of said hollow shaft, one of said ends of said second shaft having an eccentric crank and one end of a connecting rod journaled thereon, the opposite end of said second shaft having a drive gear fixed thereto and an internal gear in mesh with said drive gear and said internal gear being fixed to said housing.
Claim 8
Dependent Claim
57 words
Lens surfacing apparatus according to claim 6 wherein said rocker means of claim 1 includes an actuating arm to which the opposite terminal end of said connecting rod is journaled and a shaft carrying said workpiece actuating head wherewith operation of said drive unit effects said conversion of said compound cranking motion into said compound oscillational motion.
Claim 9
Dependent Claim
26 words
Lens surfacing apparatus according to claim 1 wherein said means for rotating said tool supporting structure and for actuating said drive unit comprises a single motor.
Claim 10
Dependent Claim
44 words
Lens surfacing apparatus according to claim 1 wherein said rotatable tool supporting structure includes internal journaling and said apparatus further includes a stationary annular seal for protecting said journaling from external contaminants, said seal normally abutting said rotatable structure with minimal frictional force thereagainst.
Claim 11
Dependent Claim
33 words
Lens surfacing apparatus according to claim 9 further including a stationary annular support for said seal, said seal being adjustable longitudinally along said support and frictionally self-held in preselected positions of adjustment therealong.
References Cited (Backward Citations)
US1272546A
Cited
US2715803A
Cited
US2880556A
Cited
US2916857A
Cited
US2977724A
Cited
US3093939A
Cited
US3383806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |