Ohio Brass Third Rail Insulator

[Trade Journal]

Publication: The Tramway and Railway World

London, England
p. 13, col. 2


The adoption of the third rail system by a number of overhead railways and several high speed surface lines, has resulted in a demand for insulators specially adapted for the third rail, and the Ohio Brass Company, of Mansfield, Ohio, U.S.A., have now brought out a device similar to the illustration shown herewith. This is of the same general character as many of its predecessors, but presents several new features which give it originality, in fact a patent has recently been allowed the Ohio Brass Company upon it. This insulator consists of a malleable iron standard rigidly secured to an insulating body of vitrified clay, or some similar material, which is of the proper size and design to support the third rail with safety, and also to present sufficient surface leakage of the current over its exterior. Upon this insulating body is fastened a malleable iron cap casting, which supports the third rail, and, by means of lugs on each side, holds it in alignment horizontally, but permits a vertical play or motion to obviate the trouble arising from the breakage of the insulators which has occurred in the past, from the rail being secured too rigidly to the insulator. Catalogue No. 4 recently issued by the Ohio Brass Company, illustrates and describes this insulator in connection with their line of similar materials.





Keywords:Third Rail Insulator : Ohio Brass Company
Researcher notes: 
Supplemental information: Patent: 628,667
Researcher:Bob Stahr
Date completed:June 9, 2009 by: Elton Gish;