WIRE STRAIGHTENING. The ordinary method of straightening wire is by means of rolls, between which the wire is drawn, and which are adjusted by means of thumb screws to bear heavily upon the bends, Another device is known as a rotary straightener, in which there are three pairs of dies, the middle pair being set out of line with the end pairs. The wire is carried through the dies, and the dies themselves are rotated, producing a jerking motion. the effect of which is to straighten out kinks, etc. A variety of auto matic machines fur wire straightening is described in a previous volume of this work, and these have not undergone any very material changes of late years.
An entirely new inetlnal of wire straightening, however, has been invented by Mr. John Wool Griswold. of Troy, N. Y.. in which the use of machinery is entirely dispensed with. The wire, as it comes from the draw is placed upon any suitable rotary support, and then led through an annealing; furnace of any suitable construction. Here it is ex
posed to the air, for it considerable interval of space, until it finally reaches a pair of mov ing rolls, through which it passes. The rolls draw the wire from the reel and through the furnace, delivering it upon a tel where it is cut into lengths by a descending knife. ing the passage of the Wire through the furnace, and also through the air space. it is kept under tension by the action of the roll and in this way it is made straight. As the wire is finally cut into lengths, no coiling is necessary. This process has been found exceedingly effective, especially in the manufacture of wire into bale bands at the factory of Messrs. Griswold Bros., in Troy, N. Y.