Insulating materials : vulcabeston controller parts, field spools, bushings, etc. ... (1894)
H. W. Johns Mfg. Co. · H. W. Johns Mfg. Co. · leaf 23
of electriclight and feeder wires. It is made of Moulded Mica, in halves.and is readily attached to the wire and held in place, as illus-trated in the cut. The insulation of the wire is thus preservedindefinitely and all danger averted. Thousands in use byelectric railway and lighting companies.No.… … waterproof on top, and bv the use of asuitable packing, a water tight joint is easily effected at thelower opening. Sockets furnished either brown or black.Thousands in use m papermills, breweries, laundries, tunnelsand other damp situations. These sockets will be furnishedwith lead covered wires…
Electricity · Electrical utilities · Insulators
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