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
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.
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)
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 |
-
1958
- 1958-04-30 GB GB13822/58A patent/GB847439A/en not_active Expired
Cited By (1)
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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