US3894361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens grinding machine
Assignee: Dimelp Optical Co Inc
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Filing: 1974-09-03
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Granted: 1975-07-15
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Expires: 1994-09-03
Abstract
Abstract A machine for selectively grinding the peripheral edges of both glass lens materials and plastic lens materials to a predetermined size and shape includes an axially shiftable shaft having a rough grinding wheel for rough grinding a glass lens to a rough size and shape corresponding to a first predetermined size and shape, another rough grinding wheel for rough grinding a plastic lens to a rough size and shape corresponding to a second predetermined size and shape and a common bevel edge grinding wheel for finishing either the rough ground plastic lens or the rough ground glass lens. Each of the grinding wheels is coaxially fixedly mounted on the shaft for axial movement therewith and rotational movement thereabout and a work carriage having a rotary lens holder capable of holding either the glass lens or the plastic lens is mounted on a frame for movement toward and away from the grinding wheels with the shaft of the grinding wheels being axially movable to selectively dispose each of the grinding wheels adjacent the held lens for grinding engagement therewith. Alternatively, the plastic lens or glass lens may be selectively disposed to the proper grinding wheel by axially moving the lens in its work carriage and axially fixing the grinding wheels. Movement control means, such as camming means, a linear solenoid in conjunction with camming means, solely linear solenoids, a rotary solenoid in conjunction with camming means or a motor in conjunction with camming means may be utilized for controlling the movement of the lens holder frame and shifting movement of the shaft to bring the edge of the held lens into selective engagement first with the appropriate rough grinding wheel dependent upon whether the held lens is plastic or glass and thereafter with the common bevel edge grinding wheel. A master template controls the engagement of the held lens with the selected grinding wheel selectively adjacent thereto for controlling the shaping of the held lens.
Inventors
- 👤 Jean Georgiadis
- 👤 Donald Leibowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:10
CPC Classifications
B; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/08; B24B9/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
366 words
A machine for selectively grinding the peripheral edges of both glass lens materials and plastic lens materials to a predetermined size and shape comprising a first axial shiftable shaft means having a first rough grinding wheel for rough grinding a glass lens to a rough size and shape corresponding to a first predetermined size and shape, a second rough grinding wheel for rough grinding a plastic lens to a rough size and shape corresponding to a second predetermined size and shape, and a first common bevel edge grinding wheel for finishing either said rough ground plastic lens or said rough ground glass lens, each of said grinding wheels being mounted on said first shaft for axial movement therewith and rotational movement thereabout, a work carriage having a rotary lens holder capable of holding either said glass lens or said plastic lens, said lens holder being mounted on a frame for movement toward and away from said grinding wheels, said first shaft being axially movable to selectively dispose each of said grinding wheels adjacent said held lens for grinding engagement therewith, movement control means for controlling said movement of the lens hOlder frame and shifting movement of said first shaft to bring the edge of the held lens into selective engagement first with the appropriate rough grinding wheel dependent on whether said held lens is plastic or glass and thereafter with said common bevel edge grinding wheel, a master template means for controlling the engagement of the held lens with the selected grinding wheel selectively adjacent thereto for controlling the shaping of said held lens, drive means for rotatably driving said rotary lens holder, and switch means operatively connected to said lens holder drive means and said master template means for causing rotation of said held lens and the operation of said movement control means under control of said master template means primarily as a function of the finishing to the associated predetermined size of successive portions of the edge of said held lens by either said glass lens rough grinding wheel or said plastic lens rough grinding wheel and said common bevel edge grinding wheel dependent on the lens material whose peripheral edge is being ground.
Claim 2
Dependent Claim
366 words
A machine for selectively grinding the peripheral edges of both glass lens materials and plastic lens materials to a predetermined size and shape comprising a first axial shiftable shaft means having a first rough grinding wheel for rough grinding a glass lens to a rough size and shape corresponding to a first predetermined size and shape, a second rough grinding wheel for rough grinding a plastic lens to a rough size and shape corresponding to a second predetermined size and shape, and a first common bevel edge grinding wheel for finishing either said rough ground plastic lens or said rough ground glass lens, each of said grinding wheels being mounted on said first shaft for axial movement therewith and rotational movement thereabout, a work carriage having a rotary lens holder capable of holding either said glass lens or said plastic lens, said lens holder being mounted on a frame for movement toward and away from said grinding wheels, said first shaft being axially movable to selectively dispose each of said grinding wheels adjacent said held lens for grinding engagement therewith, movement control means for controlling said movement of the lens hOlder frame and shifting movement of said first shaft to bring the edge of the held lens into selective engagement first with the appropriate rough grinding wheel dependent on whether said held lens is plastic or glass and thereafter with said common bevel edge grinding wheel, a master template means for controlling the engagement of the held lens with the selected grinding wheel selectively adjacent thereto for controlling the shaping of said held lens, drive means for rotatably driving said rotary lens holder, and switch means operatively connected to said lens holder drive means and said master template means for causing rotation of said held lens and the operation of said movement control means under control of said master template means primarily as a function of the finishing to the associated predetermined size of successive portions of the edge of said held lens by either said glass lens rough grinding wheel or said plastic lens rough grinding wheel and said common bevel edge grinding wheel dependent on the lens material whose peripheral edge is being ground.
Claim 3
Dependent Claim
44 words
A machine in accordance with claim 1, wherein said glass lens rough grinding wheel comprises a diamond impregnated grinding wheel in which impregnated diamonds protrude beyond the surface of said wheel and said plastic lens rough grinding wheel comprises a diamond plated grinding wheel.
Claim 4
Dependent Claim
42 words
A machine in accordance with claim 1, wherein said glass lens rough grinding wheel comprises a diamond impregnated grinding wheel in which impregnated diamonds protrude beyond the surface of the wheel and said plastic lens rough grinding wheel comprises a carborundum wheel.
Claim 5
Dependent Claim
276 words
A machine in accordance with claim 1, wherein said movement control means comprises an axially movable multipositional solenoid means for controlling axial shifting movement of said first shaft, said axially movable first shaft having a first position in which the selected rough grinding wheel is adjacent said held lens for rough grinding thereby and a second position in which the common bevel edge grinding wheel is adjacent said held lens for bevel edge grinding thereby, said solenoid means having an axially movable armature means and a coil means for effecting axial movement of said armature means between an axially selectable starting position and a first position or a second position, said axially movable armature means causing said axial movement of said first shaft from said first position to said second position, said first shaft being in said first position in accordance with the axially selected starting position of said armature means and being axially moved to said second position in response to movement of said armature means to either said first or second position thereof dependent on the lens material being ground and the axial movement required to move said first shaft from alignment of the held lens with the appropriate selected rough grinding wheel to alignment of the held lens with the common bevel edge grinding wheel; and means for moving said lens holder away from engagement of said held lens with said appropriate selected rough grinding wheel prior to said first shaft axial movement to said second position thereof and toward engagement of said held lens with said common bevel edge grinding wheel after said first shaft axial movement to said second position thereof.
Claim 6
Dependent Claim
83 words
A machine in accordance with claim 4, wherein said movement control means further comprises means for selectively axially moving said solenoid means between a first starting position corresponding to alignment of said held lens with said glass rough grinding wheel and a second starting position corresponding to alignment of said held lens with said plastic rough grinding wheel, said armature means being axially movable to said first position from said first starting position and to said second position from said second starting position.
Claim 7
Dependent Claim
15 words
A machine in accordance with claim 4, wherein lens holder moving means comprises camming means.
Claim 8
Dependent Claim
77 words
A machine iN accordance with claim 1, wherein said movement control means comprises first camming means for controlling said movement for grinding a glass lens and second camming means for controlling said movement for grinding a plastic lens, and axially movable solenoid controlled cam follower means axially movable between a first and second axial position for selectively engaging said cam follower means with either said first or second camming means dependent on the lens material being ground.
Claim 9
Dependent Claim
28 words
A machine in accordance with claim 1, wherein said movement control means comprises solenoid means for effecting both said lens holder movement and said first shaft axial movement.
Claim 10
Dependent Claim
234 words
A machine in accordance with claim 1, wherein said movement control means comprises a rotary solenoid means for controlling axial shifting movement of said first shaft said axially movable first shaft having a first position in which the selected rough grinding wheel is adjacent said held lens for rough grinding thereby and a second position in which the common bevel edge grinding wheel is adjacent said held lens for bevel edge grinding thereby, said solenoid means having an angularly movable armature means and a coil means for effecting angular movement of said armature means between an initial starting position and a first angular position or a second angular position, said angularly movable armature means being operatively connected to said first shaft for causing said axial movement of said first shaft from said first position to said second position, said first shaft being moved from said first position to said second position in response to angular movement of said armature means to either said first or second angular position therof dependent on the lens material being ground; and means for moving said lens holder away from engagement of said held lens with said appropriate selected rough grinding wheel prior to said first shaft axial movement to said second position thereof and toward engagement of said held lens with said common bevel edge grinding wheel after said first shaft axial movement to said second position thereof.
Claim 11
Dependent Claim
16 words
A machine in accordance with claim 9, wherein said lens holder moving means comprises camming means.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |