US148954A - Improvement in bolt and rod cutters - Google Patents

Description

l. G. HIRZEL.y

Bult andv Rod-Cutters.

Patented March 24,1874.

UNITED S JOHN GEORGE HIRZEL, OF VILMINGTO, DELAWARE.

IMPROVEMENT EN BGLT AND RD CTTERS.

Speciication forming part of Letters Patent No. 1455,95@ dated lilarch 24,1874; application filed November l, 1873.

To all whom t may concern:

Beit known that I, J oHN GEORGE HrnznL, of the city of Vilmington, in the county of New Castle and State of Delaware, have invented a new and valuable Improvement in Bolt-Cutters; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings making a part of this specification, and to the letters and gures of reference marked thereon.

Figure 1 of the drawings is a representation of a plan view of my bolt-cutter. Fig. 2 is a horizontal section of the same. Fig. 3 is a vertical longitudinal section of the same.

This invention has relation to portable hand bolt-cutters; and it consists in the construetion and arrangement of the parts as will be hereinafter more fully described and claimed.

The following is a description of my improved cutter.

The stock or frame ot' the cutter is composed of two plates, A A', secured together by bolts and nuts, and slotted, as shown iu the drawings. B represents a V-shaped cutter-plate, which is constructed with parallel sides, and with a beveled cuttingedge, b. This cutter-plate is rigidly secured between the contracted ends of the stock-plates A A, by means of bolts and nuts bi, and when so secured its bottom side is flush with the bottom of the plate A. C represents a reciprocating cutter, which is adjusted between the inner parallel edges of the cutter -plate B, and fitted thereto, as shown by the sectional view, Iiig. 4. 4The bottom ot' this cutter C is tlush with the bottom of the frame B, for the purpose of allowing the end of a bolt or' rivet to be cut close to the surface of the object through which it passes. G represents an elliptical yoke, which is applied between the enlarged portions ofthe plates A A', and constructed with a centra-l connecting-bridge, g, through which a screw, E, is tapped. This screw is received loosely into a recess made in the rear end of the cutter C, and is attached to this cutter byk means of a pin or screw, t, entering an annular groove in the screw, or by any other suitable means. D D designate two lever-handles, having cams or eccentrics e e formed on their ends, which are received between the plates A A and into the yoke G on opposite sides of the connecting bridge of this yoke. These lever-handles D D are connected to plates A A by pivots c' t', and they are constructed with stop pins, a rigid tongue, d, and an adjustable screw or abutment, d.

By opening and closing the handles D D the yoke G and the cutter O receive a reciprocating motion.

The screw E allows the cutter O to be adjusted so that the. handles D D when closed, as shown in the drawings, will just bring the cutting-edge of this cutter up to the cuttingedge b, which condition of things can be maintained however much ofthe cutter C be ground away. By removing the bolts and nuts and the pin or screw t the two cutters can be detached from their stock and sharpened.

It will be seen from the above description that the cutter O can be moved with considerable force, that it can be readily adjusted for wearing away ot' its edge by grinding, and

Vthat a very close and clean cut can be made by it and the cutter b acting on both sides ot' a bolt or rivet at one time.

The studs j j abut against the edges of an extension, a, of plate A, before the handles D D are brought too close, and the screw d allows the handles to be adjusted as above described, to prevent injury to the cutting-edges when they are brought quickly together.

I'Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The elliptical yoke G, constructed with the central connecting-bridge g, in combination with the adjusting-screw E and cutter O, as specified.

2. The yoke G, receiving through it the screw E, for adjusting the cutter C, in combination with the lever-handles D D, eccentrics e e thereon, and the plates A A forming the stock of the tool, as and for the purposes set' forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence l of two witnesses.

JOHN GEORGE HIRZEL.

lVitnesses:

' tTimms McCann,

VASHINGTON MASON.

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