GB1133787A - Improvements in or relating to lens trimming machines - Google Patents
Improvements in or relating to lens trimming machinesInfo
- Publication number
- GB1133787A GB1133787A GB27241/66A GB2724166A GB1133787A GB 1133787 A GB1133787 A GB 1133787A GB 27241/66 A GB27241/66 A GB 27241/66A GB 2724166 A GB2724166 A GB 2724166A GB 1133787 A GB1133787 A GB 1133787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- templet
- follower
- reversal
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000009966 trimming Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
1,133,787. Grinding. SOC. DES LUNETIERS. 17 June, 1966 [28 June, 1965], No. 27241/66. Heading B3D. - A machine for automatically trimming spectacle lenses comprises a lens carrier driven at a relatively slow rotational speed and a grinding wheel driven at a relatively high rotational speed urged against each other, the penetration of the grinding wheel into the lens contour being limited by a fixed follower solid with the grinding wheel mounting and adapted to contact a templet fastened to the lens carrier, and reversing means adapted to reverse the direction of rotation of the lens carrier as a function of the relative positions of the follower and templet. As the lens and templet are rotated, the grinding wheel penetrates the lens V from an initial point O to a point A and an electrical contact is made between the follower and templet to effect reversal of rotation of the lens and templet so that grinding proceeds along an arc AB and thereafter arcs BC and CD. When the time lag between two contact points, say CD is below a predetermined value, reversal is prevented and the lens and templet rotated for grinding of the other side of the lens. In another embodiment, the reversal points A 1 -A 4 , Fig. 5, are controlled by a timer. In a further embodiment, the follower T, Fig. 4, is carried by a resilient blade R from a structure which supports a resilient feeler I and the reversal of the lens carrier and templet is controlled by contact pulses between the feeler and follower, such reversal only being effected when the thickness S of material on the lens to be removed exceeds a predetermined value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR22534A FR1448926A (en) | 1965-06-28 | 1965-06-28 | Improvements to overflow machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1133787A true GB1133787A (en) | 1968-11-20 |
Family
ID=8583213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27241/66A Expired GB1133787A (en) | 1965-06-28 | 1966-06-17 | Improvements in or relating to lens trimming machines |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3452484A (en) |
| DE (1) | DE1577471B2 (en) |
| FR (1) | FR1448926A (en) |
| GB (1) | GB1133787A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2570973B1 (en) * | 1984-10-03 | 1987-01-09 | Briot Int | IMPROVEMENTS IN MACHINES FOR GRINDING GLASSES. |
| JP3893081B2 (en) * | 2002-05-28 | 2007-03-14 | 株式会社ニデック | Eyeglass lens processing equipment |
| FR2850050B1 (en) * | 2003-01-17 | 2006-02-24 | Briot Int | METHOD FOR GRINDING AN OPHTHALMIC LENS AND ASSOCIATED GRINDING MACHINE |
| FR2906486B1 (en) * | 2006-10-03 | 2008-12-12 | Essilor Int | METHOD OF SQUIRING A ROTATION LENS USING A ROTATING WHEEL BY INVERTING THE ROTATION DIRECTIONS OF THE WHEEL AND THE LENS. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1231920A (en) * | 1916-06-07 | 1917-07-03 | Thomas Lumsden | Tool-holder for grinding-machines. |
| US2723501A (en) * | 1953-03-23 | 1955-11-15 | Bausch & Lomb | Controlling means for lens edging machine |
| US2821050A (en) * | 1954-09-29 | 1958-01-28 | Shuron Optical Co Inc | Edge grinding machine for lenses |
| US3210890A (en) * | 1962-08-03 | 1965-10-12 | Edgar J Schroth | Edging machine |
| US3119206A (en) * | 1962-11-14 | 1964-01-28 | American Optical Corp | Lens edging machines |
-
1965
- 1965-06-28 FR FR22534A patent/FR1448926A/en not_active Expired
-
1966
- 1966-06-14 US US557547A patent/US3452484A/en not_active Expired - Lifetime
- 1966-06-17 GB GB27241/66A patent/GB1133787A/en not_active Expired
- 1966-06-25 DE DE19661577471 patent/DE1577471B2/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE1577471A1 (en) | 1969-06-04 |
| US3452484A (en) | 1969-07-01 |
| FR1448926A (en) | 1966-08-12 |
| DE1577471B2 (en) | 1970-10-15 |
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