Insulating materials : vulcabeston controller parts, field spools, bushings, etc. ... (1894)
H. W. Johns Mfg. Co. · H. W. Johns Mfg. Co. · leaf 30
eston is tough g^ i8**^ and strong, neither swells ^ ^_—Jk_ c-Cfc T^ffF Anor shrinks, is exception- jyj^^jp |JHally heat-proof and is very <£S^ durable. For these reasons it is peculiarly valuable forbrush holder and other bushings, washers and other parts indynamos, im >ti <r ~. art V^s^-… … H. W. Johns Manufacturing Co. 29 VULCABESTON CONTROLLER PARTS. One of the most note-worthy acknowledgmentsof the superiority andpractical ability of Vulca-beston to meet the se-verest requirements hasbeen its unanimous adop-of the Street Car Controllers PRICE LIST OF VULCABESTON INSULATING PIECES.…
Electricity · Electrical utilities · Insulators
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