[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 171
RECENT APPLICATIONS. 169 I inch in external diameter and \ inch thick; theymust fit tightly. Insulate the cores between thewashers and bore a ^ inch hole in one washer oneach spool to take out the beginning wire andthen put the spools in a lathe and wind them fullof No. 24 insulated wire. It is… … TELEGRAPH SOUNDER. The yoke is also soft iron | of an inch wide, -ftof an inch thick and i| inches long. Drill a | inchhole in each end, i^ inches distant from each otherand one in the middle tapped for a j% inch screwthread. Screw the spools you have wound to theyoke making a u shaped…
Electricity
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