Improvements in the bridges of pince-nez or double eyeglasses / [Frederick Alexander Dyas].
- Dyas, Frederick Alexander.
- Date:
- 1894
Licence: Public Domain Mark
Credit: Improvements in the bridges of pince-nez or double eyeglasses / [Frederick Alexander Dyas]. Source: Wellcome Collection.
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![N° 10,871 A.D. 1898 Date of Application, 26th May, 1893 Complete Specification Left, 13th Feb., 1894—Accepted, 7th Apr., 1894 PROVISIONAL SPECIFICATION. Improvements in the Bridges of Pince-nez or Double Eyeglasses. I, Frederick Alexander Dyas of 52 Queen Street, Glasgow, Lanarkshire, Optician, do hereby declare the nature of my invention to be as follows : — This invention has reference to and comprises improvements in the construction of the bridges of pince-nez or double eyeglasses. These bridges are formed in -5 two main straight parallel parts which slide over or past each other, and are adjustably held on the wearers nose by a helical spring mounted between collars or eyes at the ends of the two bridge parts. Heretofore these two bridge parts have been liable to get loose and oscillate about out of order, and been difficult to repair. ♦10 My improvements are designed to obviate this and to enable the parts to be adjustably tightened up and easily repaired should they get loose. These improvements consist in forming one of the rigid straight parts of the bridge of a hollow7 or shell shape, preferably slit or open on its upper longitudinal edge, and of a triangular, square, or polygonal shape in cross section. The other sliding .] 5 part of bridge wrnuld be formed solid of corresponding shape to fit and slide within the other hollow shaped bridge part. Collars or eyes would be fitted at the free ends of these two bridge parts, and have a helical spring mounted between these collars on the outside of the bridge parts for adjustably securing the plaquets on the nose. :20 By this construction there is little liability of the bridge parts to shake loose from each other, and any slight deviation can be easily and quickly adjusted or repaired. Dated 25th Mav 1893. W. R. M. THOMSON & Co., 25 96, Buchanan Street, Glasgow, Agents. (10MPLETE SPE(TFICATION. Improvements in the Bridges of Pince-nez or Double Eyeglasses. I, Frederick Alexander Dyas, of 52 Queen Street, Glasgow, Lanarkshire, Optician, do hereby declare the nature of my invention, and in what manner the 30 same is to be performed to be particularly described and ascertained in and by the following statement in writing, that is to say :— This invention has reference to and comprises improvements in the construction of the bridges of pince-nez or double eyeglasses. These bridges are formed in two main straight parallel parts which slide over or past each other and are 35 adjustably held on the wearers nose by a helical spring mounted between collars or eyes at the ends of the two bridge paits. Heretofore these two bridge parts have been liable to get loose and oscillate about out of order, and been difficult to repair. My improvements are designed to obviate this and to enable the parts to be 40 adjustably tightened up and easily repaired should they get loose. And in order that my said invention and the manner of performing or carrying the same into effect or practice may be properly understood, I have hereunto appended an explanatory sheet of drawings in which Figure 1 represents an elevation and Figure 2 a plan view of a pince-nez or 45 double eyeglass as fitted with my improvements. [Pric* 8</.]](https://iiif.wellcomecollection.org/image/b30735555_0001.jp2/full/800%2C/0/default.jpg)
