GB1148138A - Lens block with shield plug and method of application - Google Patents

Lens block with shield plug and method of application

Info

Publication number
GB1148138A
GB1148138A GB51091/67A GB5109167A GB1148138A GB 1148138 A GB1148138 A GB 1148138A GB 51091/67 A GB51091/67 A GB 51091/67A GB 5109167 A GB5109167 A GB 5109167A GB 1148138 A GB1148138 A GB 1148138A
Authority
GB
United Kingdom
Prior art keywords
lens
block
plug
opening
plastic material
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
Application number
GB51091/67A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Textron Inc
Original Assignee
Textron Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Textron Inc filed Critical Textron Inc
Publication of GB1148138A publication Critical patent/GB1148138A/en
Expired legal-status Critical Current

Links

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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices

Abstract

1,148,138. Grinding. TEXTRON Inc. 9 Nov., 1967 [6 Dec., 1966], No. 51091/67. Heading B3D. A lens block for mounting a lens blank comprises a curved surface 4 to which a correspondingly curved surface 5 of a lens blank is adapted to be secured, a central opening 6 opening at one end on the curved surface 4, and a plug 8 sealingly and removably mounted in the opening to shield the surface of the lens blank secured to the block. Removal of the plug permits the power of the lens to be checked during the generating of the lens without necessitating removal of the lens blank from the block. The block may be of a low-melting point metal comprising a mixture of lead, bismuth, tin, indium and cadmium moulded to the surface of the lens which may be coated with plastic material or tape, the lens being of either glass or plastic material. The block has a cylindrical portion 2, on which is a flat acting as a horizontal reference surface, and a conical portion 3 formed with two dome-shaped holes 7 for engagement by a chuck of the optical surface generating machine. The block is moulded around the plug 8 which thereby forms the centre hole for permitting checking of the optical surface when the plug is removed. The plugs may be cylindrical or conical and be of plastic material and on its outer surface is formed with a ring or helical projection to provide an interlock with the hole. A protruding. part provides a finger grip for removing the plug from the hole. In a further embodiment, the plug is of metal or hard thermosetting plastic and is sealed in the opening by a soft rubber 0-ring. The lens block may be moulded in two portions, the inner portion having a lower melting point than the outer.
GB51091/67A 1966-12-06 1967-11-09 Lens block with shield plug and method of application Expired GB1148138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59959166A 1966-12-06 1966-12-06

Publications (1)

Publication Number Publication Date
GB1148138A true GB1148138A (en) 1969-04-10

Family

ID=24400255

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51091/67A Expired GB1148138A (en) 1966-12-06 1967-11-09 Lens block with shield plug and method of application

Country Status (3)

Country Link
US (1) US3499253A (en)
DE (1) DE1652212A1 (en)
GB (1) GB1148138A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2621891C3 (en) * 1976-05-17 1981-03-19 Dollond and Aitchisen (Services) Ltd., Yardley, Birmingham, West Midlands Lens edge grinding machine and associated lens holder
FR2733710B1 (en) * 1995-05-03 1997-07-18 Essilor Int PRE-KNOB FOR GLANTAGE OF AN OPTICAL LENS, AND METHOD FOR IMPLEMENTING SAME
US6110016A (en) * 1998-06-22 2000-08-29 Ppg Industries Ohio, Inc. Lens block and method of processing lenses
CA2571162C (en) * 2004-06-15 2013-08-13 Tipper Tie, Inc. Modular clipping packaging apparatus and associated devices, methods and systems
WO2012069661A1 (en) * 2010-11-26 2012-05-31 Schneider Gmbh & Co. Kg Block piece
LU92191B1 (en) * 2013-05-06 2014-11-07 Satisloh Gmbh Multimaterial block piece

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1911153A (en) * 1929-12-28 1933-05-23 American Optical Corp Process of blocking ophthalmic lenses
GB666179A (en) * 1949-05-31 1952-02-06 American Optical Corp Improvements in or relating to devices for blocking lenses, discs, and like articles
US2595760A (en) * 1949-09-02 1952-05-06 Imp Optical Company Ltd Method of mounting lenses
US2741396A (en) * 1950-06-20 1956-04-10 Faultless Rubber Co Containers and closures therefor
US2748548A (en) * 1954-04-06 1956-06-05 Sadler Bros Inc Pitch block
US2859568A (en) * 1957-10-04 1958-11-11 Dantzic Morris Lens blocking apparatus
AT216921B (en) * 1958-12-12 1961-08-25 Bouchage Mecanique Hollow stopper that can be used as a pouring spout
US3049766A (en) * 1960-01-27 1962-08-21 Textron Inc Process and apparatus for blocking lenses
US3192676A (en) * 1960-01-27 1965-07-06 Textron Inc Lens blocks
US3221378A (en) * 1963-01-02 1965-12-07 Bausch & Lomb Lens blocking method and device
US3277612A (en) * 1964-02-28 1966-10-11 American Optical Corp Lens aligning and blocking apparatus
US3271912A (en) * 1965-03-01 1966-09-13 Textron Inc Lens blocks

Also Published As

Publication number Publication date
US3499253A (en) 1970-03-10
DE1652212A1 (en) 1970-11-05

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