US 442426 A
Description (OCR text may contain errors)
No. 442,426. Patented Dec. 9, 1890.
UNITED STATES JOHN DONNELLY, OF
SPECIFICATION forming part of Letters Patent No. 12,426, dated December 9, 1890.
Application filed March 21, 1890. Serial No. 344,777. (No model.)
To aZZ 1071 0122 it may concern:
Be it known that 1, JOHN DONNELLY, a subject of the Queen of Great Britain, but have declared my intention of becoming a citizen of the United States, residing at Branford, in the county of New Haven and State of Connecticut, have invented certain new and use ful Improvements in Pliers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
This invention relates to pliers, and most particularly to that class which are provided with wire-cutting edges.
The object of the in ention is to provide a tool which can be cast and readily put together without welding or forging. The gripping-jaws and cutting-edges are drop-forged and of the best tool-steel, being secured to the ends of the levers by screws, so as to be easily replaced at a small cost when broken.
In the drawings, Figure l-is a perspective view of a pair of cutting-pliers embodying my invention. Fig. 2 is a perspective view showing the parts detached and arranged in their relative position. Fig. 3 is a perspec tive view of the detachable steel plate. Fig. at is a side view of the front portion of the pliers, the jaws being closed and the cuttingedges being on the obverse side. Fig. 5 is a reverse view of that portion of the pliers seen in Fig. 4.
A and B represent two levers, which are pivoted together at (J in the usual manner.
D and D are two drop-forged plates of best tool-steel. These plates are properly tempered and have suitable openings cl for the insertion of screws or other fastening devices ffor securing them to the ends or jaws a and Z) of the respective levers. The rear portion E of the plates is cut away to form the cutting-edge e and give clearance for the wire between the jaws. The opposing sides of the jaws a and b are parallel for a short distance and approach near their outer ends, and the plates D and D are of corresponding shape on their outer sides, so as to lie close to the jaws. By this construction of the jaws and the plates a pressure on the said plates, as when gripping a wire or other article, will have a tendency to press the plates in or toward the pivot C of the levers, thereby relieving the fastenings f from lateral strain, as the inner ends of the plates abut against shoulders at the inner ends of the said jaws.
The lever A is composed of two parts, the jaw a and the handle G. The jaw a is provided with tang a, which is inserted through opening I) in the lever B. 'The inner end of the handle G is bifurcated and spans the tang a, to which it is secured by rivets g. By having lever A made in two parts the levers A and B can be cast and quickly put to gether.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s
1. The hereinbefore shown and described cutting-pliers, composed of the cast-metal 1e" ver B, having jaw b and the opening I), the cast-metal jaw a, having the tang a, the latter being thrust through. the opening I), the cast-metal handle A, having its end bifurcated and adapted to receive the tang a, to which it is firmly riveted, the jaws to and. I), having their opposing faces extending parallel for a short distance and converging near the outer ends of the jaws, and the temperedsteel plates D D, fitted to and secured by screws to the jaws a and b and having side cutting-edges e, substantially as and for the purpose described.
2. In cuttingpliers, the combination, with a pair of levers pivoted together and having the opposing faces of their jaws approximately parallel for a short distance and approaching near the outer ends of the jaws, of tempered-steel plates fitted to and secured by screws to the said jaws, the said plates having side cutting-edges e and having their outer portions decreasing in thickness to correspond with the inclination of the said jaws, substantially as set forth.
In testimony whereof I atiix my signature in presence of two witnesses.
JAMES OBRIEN, MICHAEL F. OBRIEN.