Winding Solenoid Coils
A DRILL is exceedingly handy for the rapid winding of solenoid coils if the hard wood is tightly fitted into one end of the former used, and in the exact centre of this plug is fixed a short length of 4-in. studding which can be gripped firmly in the jaws of the drill chuck. . When winding is to take place, the horizontal hand-grip of the drill is removed and the stud to which it is attached is firmly held in the jaws of the vice. The drill itself is thus fixed parallel with the ground. The coil former is gripped in the way already described, the..end ‘of the wire is anchored to the folfper in the usual way, and the reel is Cs ed ina holder provided with a ke which can be adjusted to give the right tension. If the crank of the drill is not rotated too quickly, the wire runs on quite evenly, and a 60-turn coil can be made with almost inctedible rapidity.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19300103.2.35
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Radio Record, Volume III, Issue 25, 3 January 1930, Page 12
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170Winding Solenoid Coils Radio Record, Volume III, Issue 25, 3 January 1930, Page 12
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