US 821183 A
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Description (OCR text may contain errors)
No. 821,188. PATENTED MAY 22, 1906. J, N. NET'I'LBTON.
APPLIOATION FILED mm: 16. 1905.
JOSEPH N. NETTLETCN, OF ROCKFALL, CONNECTICUT.
Specification of Letters Patent.
fatented May 22, 1906.
Application filed June 16,1905. Serial No. 265,583.
To all whom it may concern:
Be it known that I, JOSEPH N. NETTLETON, a citizen of the United States. residing at Rockfall, in the county of Middlesex, State of Connecticut, have invented certain new and useful Improvements in Nippers; 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 whiohit appertains to make and use the same.
This invention relates to cutters such as are employed for cutting wires, bolts, and other metal objects, the object of the invention being to provide a structure wherein the cutting-blades will not only be removable and reversible, but their cutting portions will be so formed and the jaws of the cutters so shaped that the blades will be held securely against movement in operation, while they may be easily and quickly adjusted and shifted when the cutters are not in use.
A further object of the invention is to provide a structure that will be strong and durable under the various conditions of its use.
In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a side elevation showing a pair of cutters or nippers embodying the present invention. Fig. 2 is a detail perspective view of one of the cutters or blades. Fig. 3 is a view similar to Fig. 1, showing the blades held in place by means ofscrews in addition to the sockets.
Referring now to the drawings, and more particularly to Figs. 1 and 2 thereof, there is illustrated a pair of nippers comprising two members 5 and 6, that are crossed and pivoted together and each of which has at one side of the pivot a handle 7 and at the other side of the pivot a jaw 8. In the outer end face of each of the jaws 8'is formed a dovetail transverse groove 9, parallel with the axis of the pivot 10 of the nippers, and the end face of each jaw at the inner side of the dovetail groove is flat, as shown at 11. The end face of each aw at the outer side of the dovetail groove is flat directly adjacent to the groove, as shown at 12, and is in the same plane with the portion 11, while beyond the portion 12 the face of the jaw slants upwardly, as shown at 13, to the outer side face 14 of the jaw, the face 13 forming a shoulder which projects beyond the portions 11 and 12 for a purpose to be presently explained.
In connection with each of the jaws there is employed a bevel-edge blade, including a body portion 15 and a stem 16, the stem 16 being dovetailed in shape, so that it may be slid into the dovetail groove of the corresponding jaw and will fit it snugly. When the blade is in place, its lower faces directly adjacent to the stem fit snugly against the faces 11 and 12 of the jaw. Both longitudinal edges of each blade are beveled above and below, and when the blade is in place one of the lower beveled faces (indicated at 17) lies snugly against the corresponding face 13 of the jaw, while the other lower beveled face projects beyond the inner side face 18 of the jaw, as indicated at 19. The upper beveled face 20 forms a continuation of the face 15 of the jaw, while the upper beveled face 21 meetsthe face 19 and forms the cutting edge in this position of the blade.
When the handles 7 are operated to bring the cutting edges together upon an object to be cut, the faces 13 tend to deflect the blade upwardly from the groove 9, so that there is a pull on the stem of the blade instead of a transverse breaking strain, and the greatest strength of the metalthat is, its tensile strength is utilized.
Both sides of each blade being the same in every particular and the transverse dimensions being constant, either blade may be withdrawn and reinserted in a reverse position, so as to expose its opposite cutting edge.
In Fig. 3 of the drawings the groove 9 in each jaw corresponding to the groove or slot 9, above described, is square instead of dovetail to receive the square stem 16 of the blade to hold the latter against lateral displacement, and to hold the blade against longitudinal displacement and against withdrawal from the groove a headed screw is passed through a perforation 31 in the blade and is engaged in a threaded recess 32 in the bottom of the groove 9, the perforation in the blade being countersunk at its outer end to receive the head of the screw between which and the bottom of the groove the blade is clamped. The contacting beveled faces 17 and 13 of the blade and jaw serve to deflect the blade away from the bottom of the groove in the action of the nippers and against the head of the screw, so that the screw serves in its clamping action to hold the blade constantly against movement in the only direction in which it has a tendency to move.
What is claimed is A pair of nippers comprising pivotally-connected members, each including a jaw, each beveled faces, one of the beveled faces of each of said jaws havin a groove in its end and an adjacent slanting lace at the other side of the groove, and a blade for each jaw having a stem removably engaged in the groove and adapted for reversal to present its longitudinal edges interchangeably at the inner side of the jaw, said edges being disposed in a com mon plane parallel to the outer face of the blade, the cutting edge of each blade being formed of a pair of outwardly-converging blade being disposed to lie in contact with the slanting face of the jaw, and means for holding the said blade against movement out- 1 5 war'dly from said jaw.
In testimony whereof I affix my signature in presence of two witnesses.
' JOSEPH N. NETTLETON. Witnesses:
ALFRED H. AUGUR, ANNA E. AUGUR.