US2209751A - Cutting tool - Google Patents

Description

J. F. WULFF CUTTING TOOL" Filed Sept. 11, 1937 FIG. 2.

FIG. 6'.

n N R 0 m L .1 NW 7 W. A mm m J. a Y B M a 3 2 3 3 5 m a v Patented July 30, 1940 UNITED STATES CUTTING TOOL John F. Wulif, Westfield, N. J., assignor to Western Electric Company,- Incorporated, New York, N. Y., a corporation of New 'Y0l'k Application September 11, 1937, Serial No. 163,381

3 Claims.

- This invention relates to a cutting tool and more particularly to a tool for cutting sheet material.

There is an innumerable number of places and conditions, under which it is desired to cut pieces of sheet material, paper, cellulose products, gold leaf, other metallic foils, textiles, films, etc., etc., by hand on a table top, board or other appropriate support.

An object of the present invention is .to produce a simple, handy and reliable device or tool for such use with an interchangeable cutting blade, in which the blade is automatically completely housed except when in use.

With the above and other objects in view one embodiment of the invention may comprise a housing adapted for comfortable manual handling having a chamber within which a sharp edges blade is pivotally mounted to be completely retired within the housing when not in use, and provided with means to cause a portion of the edge of the blade to protrude from the housing while in use only.

Other objects and features of the invention will appear from the following detailed description of one embodiment thereof taken in connection with the accompanying drawing in which the same reference numerals are applied to identical parts in the several figures and in which Fig. l is a broken view in side elevation of a tool constructed in accordance with the invention;

Fig. 2 is an exploded plan view thereof;

Fig. 3 is a detached view in side elevation of the body of the tool;

Fig. 4 is a detached view in end elevation of the blade and its control member;

Fig. 5 is a detached view in side elevation of the cover plate, and

Fig. 6 is a detached view in side elevation of the blade.

The embodiment of the invention herein dis-' closed comprises a body 20 formed with a recess or chamber 2| and an integral handle 22. This body may be made of any suitably rigid material, metal, wood, molded plastic such as Celluloid or artificial resin, or other appropriate substance. The bottom wall of the recess 2| is pierced with a perforation 24 and a slot 25. There is also a bore 28 extending down inside the body from its top surface and substantially parallel to and intersecting longitudinally the slot 25.

A little to the right of the recess 2| is a stop shoulder 21, against which may be abutted the correspondingly formed right hand edge 28 of a. cover plate 29 formed to match the outline of the body 20 and to fit thereon to cover the recess 2|. When in place, this cover plate may be held by a bolt 36 and nut 3|, the bolt passing snugly through the perforation 24 and through a corresponding perforation 32 in the cover plate.

The recess 2| is made to be little deeper than the thickness of an ordinary double edged razor blade 34 of the type shown in Fig. 6 and generally familiar under such trade-marks as Gillette, Probak," etc. Such blades are commonly manufacture and sold to fit various commercial safety razors and have a generally uniform size and shape. Further they are customarily provided with at least two round perforations, or with one perforation 33 having an elongated form whose ends are relatively located in the blade where the two perforations of the other type are. The two opposite longer edges of the roughly rectangular blade are sharpened.

The two ends of the recess 2| are so formed and the perforation 24 is so located that when a razor blade as described is located flat in the recess with the bolt 30 passing through one end of .the perforations 33 as well as through the perforations 24 and 32, the blade 34 may swing pivotally on the'bolt as indicated in Fig. 1 to be either completely contained within the body 26 as a housing or to protrude its left end slightly from the bottom of the housing. The bolt 30 is however made somewhat smaller in diameter than the rounded end portion of the slot 33 so that the blade 34 may slide a little on the bolt as well as pivot thereon.

The stem 35 of a push button 36 is slidable in the bore 26 and so also longitudinally in theslot 25. A screw 31 passes through the left end of a slot 40 and through the slot 25 and is mounted in the lower part of the stem 35. The head of this screw is too large to pass through the slot 33 and so holds the blade 36 pivotably to the stem 35. The button 36 is normally held. in the upper position shown in Fig. 1 by a leaf spring 33 mounted as shown, on the body 20 by screws 39.

By pushing down on the button 36 with the thumb or a finger while holding the body 26 or handle 22 in the hand, the left lower corner of the blade is forced to protrude from the body into operative position as shown in dotted lines in Fig. 1. Although the bore 26 is straight and not arcuate, the blade, pivoted at 30 is free to slide on the bolt 30 as described above, sufliciently to allow the screw 31 to follow the straight line motion of the stem 35 in the bore 26.

The cover plate 29 is formed with the slot 40 located over and parallel to the slot 25 of sumcient width to receive the head of the screw 31.

When a blade 34 is dulled by use at one corner, removal of the plate 29 and screw 31 will permit the blade to be turned end for end or side for side or both to bring a fresh corner into use, or a new blade may then be conveniently substituted.

parted from and modified in many ways without departing from the scope and spirit of the invention as pointed out in and limited solely by the appended claims.

What is claimed is:

1. The combination with an apertured double edged razor blade or the like, of a body having a chamber therein, a fixed pivot and a reciprocable pivot disposed in the chamber and positioned to in the chamber, and a. double edged blade apertured to receive and be removably mounted on both pivots for movement about the fixed pivot by the reciprocable pivot from a safety position entirely within the body to a cutting position with a portion of an edge of the blade protruding beyond the body.

3. A safety cutting tool comprising a body having a chamber therein, a fixed pivot positioned in the chamber, a reciprocable pivot positioned in the chamber, and a blade having a plurality of cutting edges and apertured to receive and be mounted in selective positions on both pivots for movement about the fixed pivot by the reciprocable pivot from a safety position within the body to a cutting position with a portion of one of the edges protruding beyond the body.

JOHN F. WULFF.

Images