GB847439A - "improvements in and relating to ophthalmic mountings" - Google Patents

"improvements in and relating to ophthalmic mountings"

Info

Publication number
GB847439A
GB847439A GB13822/58A GB1382258A GB847439A GB 847439 A GB847439 A GB 847439A GB 13822/58 A GB13822/58 A GB 13822/58A GB 1382258 A GB1382258 A GB 1382258A GB 847439 A GB847439 A GB 847439A
Authority
GB
United Kingdom
Prior art keywords
bushing
pivot
ear
hinge
shoulder
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
GB13822/58A
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.)
American Optical Corp
Original Assignee
American Optical Corp
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 American Optical Corp filed Critical American Optical Corp
Publication of GB847439A publication Critical patent/GB847439A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C5/00—Constructions of non-optical parts
    • G02C5/22—Hinges
    • G02C5/2281—Special hinge screws
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2200/00—Generic mechanical aspects applicable to one or more of the groups G02C1/00 - G02C5/00 and G02C9/00 - G02C13/00 and their subgroups
    • G02C2200/20—Friction elements

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

847,439. Hinges and pivots. AMERICAN OPTICAL CO. April 30, 1958 [Dec. 11, 1957], No. 13822/58. Class 65(2). In a hinge for an ophthalmic mounting a plastics bushing 24 fitted on the pivot 22 and having an initial outer diameter such as to intimately fit within the aligned apertures in the hinge ears 17, 17a, 18, 18a is compressed endwise when the pivot is screwed into the smaller threaded aperture 25 in the hinge ear 18b and expands into frictional engagement with the inner side walls of the aligned apertures. The bushing is compressed between the upper surface of the ear 18b and the lower surface of a shoulder 21b on the pivot head, and the material of the bushing, which is preferably nylon, is forced inwardly into the adjacent threads 23 of the pivot and outwardly to form a flange 27 between the shoulder and the base of a counterbore 26 formed in the ear 18. The degree of friction obtained can be controlled by adjusting the initial length of the bushing. Specification 781,819 is referred to.
GB13822/58A 1957-12-11 1958-04-30 "improvements in and relating to ophthalmic mountings" Expired GB847439A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US847439XA 1957-12-11 1957-12-11

Publications (1)

Publication Number Publication Date
GB847439A true GB847439A (en) 1960-09-07

Family

ID=22186939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13822/58A Expired GB847439A (en) 1957-12-11 1958-04-30 "improvements in and relating to ophthalmic mountings"

Country Status (1)

Country Link
GB (1) GB847439A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139692A (en) * 1983-05-11 1984-11-14 Suteichi Wakayoshi Hinge mechanism employed to those products such as glasses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139692A (en) * 1983-05-11 1984-11-14 Suteichi Wakayoshi Hinge mechanism employed to those products such as glasses

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