Patent for "spectacle-frames in which the bows are turned into a coil near the points where they are connected to the lens-hoops for the purpose of forming spring-joints, instead of the ordinary pivot-joints." (Lines 6-10) Includes instructions and illustrations.
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Titles
Main Title:
Improvement in Spectacle-Frames.
Added Title:
Spectacle-Frame.
Description
Patent for "spectacle-frames in which the bows are turned into a coil near the points where they are connected to the lens-hoops for the purpose of forming spring-joints, instead of the ordinary pivot-joints." (Lines 6-10) Includes instructions and illustrations.
Physical Description
[1], 1 p. : ill. ; 23 cm.
Notes
Specification forming part of Letters Patent No. 170,644, dated November 30, 1875; application filed July 15, 1875.
Stewart, John W.Improvement in Spectacle-Frames.,
patent,
November 30, 1875;
[Washington D.C.].
(https://texashistory.unt.edu/ark:/67531/metapth166503/:
accessed April 26, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting UNT Libraries Government Documents Department.