. Electric railway review . <U Cut No. 1 shows a cross section of a Keystone Giant Strain Insulator. The strain shell is of one piece, malleable iron, of extra quality. The very black lines indicate solid mica washers and the light parts malleable iron. <H Cut No. 2 shows the unassembled Insulator, A being the malleable one-piece shell,B the insulated bolts, C the solid mica discs between the two insulated bolts, D the mica washers, and E the strain ring over which the shell is folded. *K For mechanical strength and perfect insulation, Keystone Giant Strain Insulators are unsurpassed. Th
. Electric railway review . <U Cut No. 1 shows a cross section of a Keystone Giant Strain Insulator. The strain shell is of one piece, malleable iron, of extra quality. The very black lines indicate solid mica washers and the light parts malleable iron. <H Cut No. 2 shows the unassembled Insulator, A being the malleable one-piece shell,B the insulated bolts, C the solid mica discs between the two insulated bolts, D the mica washers, and E the strain ring over which the shell is folded. *K For mechanical strength and perfect insulation, Keystone Giant Strain Insulators are unsurpassed. Their approximate breaking strength varies from 3,500 to 10,000 pounds, according to size. Electric Service Supplies Co. Railway Material & Electrical Supplies MiSYER &ENGLUND NEW YORK GABTON-DANIELS DEPT. KEOKUK PITTSBURG SAINT LOUIS PORTER &BERG DEPT CHICAGOATLANTA For Public Utility Corporations
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
