[Trade Journal]
Publication: Railway Signaling and Communications
Chicago , IL, United States
vol. 42, no. 7, p. 454, col. 1
New Developments
NEW TRANSPOSITION
INSULATOR
The Hemingray Division of the American Structural Products Company, subsidiary of the Owens-Illinois Glass Company, Muncie, Ind., has developed a new glass communication insulator, designed especially for point-type transpositions. Designated as the No. 56, it is smaller than the company's larger No. 53 insulator. Like the No. 53, however, no special hardware is required, and transpositions can be made on standard pins. The insulator has been tested by methods established by the A.S.T.M. (D-468-42, Standard Methods of Testing Pin-Type, Line-Glass Insulators).
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| The No. 56 is Smaller Than the No. 53 |
Extra deep grooves eliminate the need for tie wires when used in point transpositions on tandem brackets, although its use in certain other types of transpositions does require the use of tie wires. Re-transpositions can be made by rolling in the old lines at transposition points, thus eliminating the necessity of cutting the wires.
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