US1928187A - Roofer's knife - Google Patents

Description

Sept. 26, 1933. M L RADEL 1,928,187

ROOFER S KNIFE Filed Aug. 25, 1930 3mm/vwo@ MAUR/CE l.. 'AEL Patented Sept. 26, 1933 Maurice L. Rudel, st. Paul, Minn.

`Application Aug-ust V25, 1930. Serial No. 477,677

2 Claims.

This inventionlappertains to tools and more particularly to a tool forfacilitating thelaying of 'asphalt roong material.. v

One of theprimaryobjects of my invention is Vto provide a novel type of knife for cutting and marking'asphaltroong material, the bladefbeing of novelformation, whereby the material canv be readilyand quickly cut with the expenditure of a minimum amount of exertion. j

Another important object of my invention is the provision of novel means for mounting the cutting blade on the operating handle whereby the blade will be so disposed as to readily engage the material and to lodge in a plane below the material whereby the hand of the operator will be positioned above the material and thereby not come into contact with the rough surface thereof.

A further salient object of my invention is the provision of novel means for mounting the blade on the end of the handle whereby the same will be firmly held and whereby the same can be quickly removed for resharpening or renewal of the blade as the case might be.

A further important object of my invention is the provision of novel means for mounting the blade on the handle whereby the blade will be thoroughly braced and whereby a part of the blade holding means can be utilized as a marker or punch to facilitate the initial'starting of the cutting of the asphalt material.

A still further object of my invention is to provide an improved roofers tool of the above character, which will be durable Vand ellicient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts,v as will be hereinafter more specifically described, claimed, and illustrated in-the accompanying drawing, in which drawingz'- Figure 1 is a side elevation of my improved tool.

Figure 2 is a detail section taken on the line 2-2 of Figure 1 looking in the direction of the arrows illustrating the novel means for mounting the blade on the handle shank and the novel marker or punch carried by the handle shank, and

Figure 3 is a detail perspective view of the novel blade utilized in my tool.

Referring to the drawing in detail, wherein similar reference characters designate corresponding partsthroughout the several views, the letter A generally indicates my improved tool, which comprises a shank or handle 10 preferably formed from round metal stock. One end of the shank or handle 10 is provided with a hand grip 11 which can be made of wood, if preferred. The shank or handle 10 is offset as clearly shown in Figure l of the drawing and thus this handle embodies substantially parallel front and,l rear portions l2 and 13 and the downwardly inclined connecting intermediate portion 14. The front Aportion l2 is thus disposedin a planeubelow the rear portion 13 and the handle grip 1l is therefore arranged above said front portion 12. The front portion 12 at its extreme forward end is preferably flattened as at 15 and bifurcated to provide spaced parallel ears or arms 16. These ears or arms 16 are adapted to receive therebetween the cutting blade 17, which forms an important part of my invention. The cutting blade 17 includes a at body 18 having a tang 19 projecting rearwardly from the central portion of its rear edge and the inner or rear edge of the body 18 on opposite sides of the tang 19 are sharpened to provide cutting edges 20 and 21. These cutting edges 2G and 21 preferably incline inwardly toward the tang as clearly shown in Figures 1 and 3 of the drawing. These ears or arms 16 receive the tang 19 and the central portion ofthe body 18 of the cutting blade and the tang and the central portion of the body 18 of the blade is provided with openings 22, which align with openings formed in the arms 16. These aligned openings receive tightening bolts 23 which effectively hold the blade in position between the ears or arms 16 and the arms or ears into intimate contact with the opposite faces of the blade. It thus can be seen that the blade projects above and below the shank or handle 10. One of the ears 16 is made longer than the other ear as indicated by the reference character 24 and this arm or ear projects beyond the outer edge of the blade. The end of the projecting portion 24 of the ear 16 is beveled to provide a sharpened penetrating or marking point 25, as more clearly sown in Figure 2V of the drawing. It should also `be noted that after a cut has beenstarted and the v blade engaged through a slit formed by the extension 24, the tool may be disposed at such an ineline with respect to the sheet material that the extension or blade 24 will engage in the cut and serve as a rudder or guide to direct movement of i the blade as pulling force is exerted. Therefore the blade will be braced against transverse movement and a straight cut will be easily made. This is shown in Figure 1 by dotted lines representing a short section of sheet material with the extension 24 and one blade of the cutter extending through the material.

In use of my improved tool the blade is inserted in the material to be cut and is drawn along said material, the cutting edge 21 effectively severng the same. Owing to the offset formation of the shank or handle 10 the hand grip will be positioned in a plane above` the material and thus the hand of the user will not come into contact with the rough surface thereof. The blade can be reversed so as to bring either the cutting edge 20 or 21 below the handle bar and owing to the construction of the blade the edges can be readily sharpened when necessary or desirable.-

The point 25 is used for marking the roofing material and when a cut is started in the middle of a sheet of roong material, this point 25 can be used as a punch to make an initial opening in the material for permitting the insertion lof one end of the blade therein.

Changes in details may be made without departing from the spirit or the scope of this invention, but:

' What I claim as new' is: 1. A tool for cutting sheet material comprising a shank bent in spaced relation to its ends to form offset front and rear end portions joined by a diagonally extending intermediate portion, the said front portion being'split from its free end to form longitudinally extending arms, one arm being longer than the other and projecting beyond the free lend thereof, a blade extending transversely between said arms with its end portions projecting from opposite side edges thereof and having rearwardly diverging sharpened edges, the intermediate portion of the blade being extended rearwardly to form a tang having its outer end of greater width than the arms to project from opposite sides thereof and having its side edges converging rearwardly, and removable fasteners engaged through the arms and blade to removably secure the blade in place,

the longer arm projecting forwardly from said blade and sharpened to form a penetrating prong adapted to initially penetrate the sheet material to be cut and engage in a cut to guide the blade through material being cut.

2. A tool for cutting sheet material comprising a shank, the said shank being split from its front end to form longitudinally extending arms, one arm being longer than the other and projecting beyond the free end thereof, a blade extending transversely betweenfsaid arms with its end portions projecting from oppositeside edges thereof and having sharpened rear edges, the longer arm projecting forwardly from said blade and sharpened'to form a penetrating vprong adapted to initially penetrate the sheet material to be cut and engage in a cut to guide the blade through material being cut.

Y MAURICE L. RADEL.

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