Kimble trolley insulators

[Trade Journal]

Publication: The Electrical Engineer

New York, NY, United States
vol. 11, no. 163, p. 690,691, col. 1,1-2



Let your "ads." do the talking this hot weather.



THE wide and constantly increasing field afforded by electric railway work, has led the Mica Asbetite Insulating Co., of Denver, Col., to give special attention to this branch of electrical industry.


This illustration has not been processed yet.


The insulating material used by this company is a compound, of which atomized mica is the foundation, and which, while resisting both fire and water, is claimed to be unexcelled in durability.


This illustration has not been processed yet.


In the accompanying illustrations, Figs. 1 and 2 represent a novel trolley wheel and holder. As will be seen, the pieces E and F screw together, firmly holding the centre wire bearing, B, which is quickly replaced when worn out. The wheel is firmly mounted on the centre shaft C, which runs in the removable bushing, D, and is lubricated by the oil cup seen in Fig. 2. The shape of the holder prevents the span wires from being caught and broken by the trolley, when jumping from the wire. The rubber tires, A, protect the insulated bells from being broken by the wheel. The holder is in two parts, G, G, fastened together by two screws, and holding all the parts securely m place.


This illustration has not been processed yet.


In Figs. 3 and 4 is shown the insulated bell and combination clamp. The insulating compound is hermetically sealed, and electric holds a button into which the clamp is screwed. The trolley wire is firmly gripped between the two pieces of the clamp, which are held together by three keys driven through the lugs. The clamp can be easily attached or removed by an ordinary tack hammer. In connection with the new form of bell, the clamp shown in Fig. 6 is used, and has the advantage of being easily and quickly detachable.


This illustration has not been processed yet.


The combination trolley wire hanger and stay is shown in Fig.6. The insulating hooks and bells are staying wires on single track roads. This method combines the hangers and pull-overs in one arrangement, and also effects a double insulation.


This illustration has not been processed yet.


Fig. 7 shows the insulated pull-over, or curve bracket. By this device the trolley wire is quickly fastened in place by driving a key through the lug. The button is held firmly by the insulating compound completely insulating the trolley wire.


Keywords:Trolley Insulator : Need Image
Researcher notes: 
Supplemental information: 
Researcher:Bob Stahr
Date completed:May 17, 2011 by: Bob Stahr;