Trolley & strain insulator
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[Trade Journal] Publication: The Electrical Engineer New York, NY, United States |
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TRADE NOTES AND NOVELTIES AND MECHANICAL DEPARTMENT. "Put Merit in your goods and Truth in your 'Ads.,' So shall your purse not go lean." · · SOME NEW STYLES OF OVERHEAD INSULATORS.
THE illustrations, Figs. 1, 2 and 3, show a new range of insulators for overhead work, as manufactured by The Electric Construction and Repair Co., 205 and 207 Canal street, Chicago. They are claimed to be exceedingly light and ornamental, and the main feature of utility is that all soldering is done away with. In the insulator for straight line work the insulation is obtained by a rubber piece half an inch thick, which is also made in such shape as to shed moisture, the form of the top or span wire clamp ensuring a perfect hold, and the bottom or trolley wire clamp giving a perfect hold on the trolley wire, yet at the same time not completely covering it. It is claimed that this insulator can be attached in one-tenth the time of those forms where soldering is required. The same recommendations apply to the curve insulator as are made on that for straight line work.
The strain insulator is undoubtedly an excellent device, its strength being very great, and as will be seen, its shape is very neat and attractive. In all these forms the insulation is entirely concealed in the metal globes. The advantage of this feature can be readily appreciated. The cuts show the construction, which is as follows: No. 1 is made in four parts, top and bottom clamps and the two halves of the globe, between which is placed a rubber piece as illustrated. No. 2 is made with the insulation, the eyebolt and the hook, on the inside of the globe.
No. 3 is made with the insulation the same as No. 2. In both No. 2 and No. 3 the iron used ,s made amply strong enough to meet all and more than their requirements. The company have filed an application for a patent. The cuts shown are exactly half the actual size of the devices. · ·
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