Publication: The Electrical Engineer
New York, NY, United States
NEW STYLE ANDERSON TROLLEY WIRE HANGERS.
We illustrate two new forms of trolley wire hangers recently brought out by Messrs. A. & J. M. Anderson, and now being sold by the Engineering Equipment Company, of New York and Boston.
Fig. 1 shows a hanger which has met with a very favorable reception from constructing engineers and has the merit of bringing the trolley wire as near to the span wire as possible. Fig. 2 illustrates the second form, which has the much-used high support and permits the hanger to be readily sprung into place upon a tightly drawn span wire. We note a decided tendency, however, among many constructing engineers to bring the strain as much in line with the trolley wire as possible. The form shown in Fig. 2 was designed, therefore, to accomplish this aim and has been adopted by several engineers in their present work, as possessing advantages not to be found in other forms of hangers, in addition to being uncommonly compact and strong, and thoroughly reliable as regards durability.
Both these designs of hangers have the form of an inverted cup, with side arms for attachment to the span wire. The cup is filled with the standard Anderson compound, known as the AEtna, insulating material, with a long petticoat extending beyond the metal, and a threaded brass fixture embedded therein, to which any one of the numerous trolley clips or ears on the market can be readily attached. Brass alone is used for the metallic portion of the hanger, which effectually prevents the creeping over the insulation of the rusty film which sooner or later by oxidation occurs in hangers containing iron, thereby seriously impairing the insulation of the trolley wire. Altogether the new hangers are light, exceedingly strong and made to last, and several orders have already been placed. They have met with a cordial reception among constructing engineers who believe they will stand the test of time and fill the want of substantial materials for permanent overhead construction.
In Fig, 3 is illustrated the standard Anderson AEtna railway bell insulator, well known through the thousands now in use. The AEtna material is an exceptional insulating compound. It is moulded under a pressure of several tons to the square inch, does not crack or split when struck, is entirely unaffected by water, has stood boiling for hours without damage and will stand any amount of ill-treatment on account of its toughness and strength. It is especially adapted, therefore, for use as a reliable bell insulator, or in a similar form, wherein the weight of line and any strains must be borne by the material itself.
The Engineering Equipment Co., 143 Liberty St., New York, and 126 Pearl St., Boston, are the Belling agents for the line materials and the Boston trolley manufactured by the Messrs. Anderson.