US1865885A - Mortar hawk - Google Patents

Description

July 5, 1932. BYHRE y 1,865,885

MORTAR HAWK Filed April 2. 1928 Patented July 5, 1932 arras STATES PATENT. oFFlcE JACOB BYHRE, or CHICAGO, ILLINOIS MORTAR HAWK Application sied April 2, 192s. seriai No. 266,759.

which will render it stiff and resistant against pressure and warping strains.

Another object of the invention is to secure in the novel design of the plate a suiicient body with a minimum thickness of material, thereby reducing the weight of the structure. y

A final, but nevertheless important object of the invention is to incorporate in the novel hawk a brace for the plate and a protecting element for the handle.

With the above objects in view and any others that may suggest themselves in the specification and claims to follow, a better understanding of the invention may be gained by reference to the accompanying drawing, in which- 80 and Fig. 2 is a vertical cross section of the same, centrally taken.

Figure 3 is an elevational view showing the 85 hawk deposited on a fiat surface when not in use.

lt has been my observation that hawks of the prevalent type have a tendency toward weight, making the support of the same in 0 the hand tedious and tiresome. Also, the flat nature of the conventional hawk plate subjects it to warping when deposited on a hard surface when the hawk is laid aside, so that in time the edges of the hawk dip at one 4 5 place or another with the effect of hasten' ing the sliding and dropping of material deposited on the hawk plate. Further, hawk plates in the standard structures are not suiiiciently braced to stand rough usage, and

much annoyance is sufered by the worker in Figure 1 is a plan view of the novel hawk;

the use of the implement. It has been my intention to eliminate the deficiencies related above in connection with implements of this nature, and attain the objects above-outlined. to their fullest extent.

Referring specifically to the drawing, 5 denotes the plate of the novel hawk, which is villustrated with a square outline, although the latter need not necessarily be of such form; in other words, the hawk may be round or of any other contour that may be found desirable.

The plate 5 is of pressed or rolled alumi` num for purposes or lightness, although any other suitable metalfmay be used for the' V same. The plate has a slight but easily perceptible concavity, as apparent in Figure 2, and is adapted to rest with its central portion in the concavity of a brace pad 6. This pad is an aluminum casting, and has suii-L cient body to afford a rigid and stable seat to the plate 5. For permanency, the plate and the pad are soldered, point-fused or riveted to one another. In the last connection I have shown the rivets as studs 7 projecting from the pad 6 through holes in the plate 5. These holes may be counter-sunk, and the rivets hammered wide to fill the holes and serve as positive retainers for the plate. The

illustration of the rivets is merely made to` y indicate one positive mode of connecting the plate to the pad; of course, any othersuitl able 'means' may be used to make a positive connection, if found advisable. Y It will be noted that the receptacle plate is provided with a central aperture to receive one of the integral studs or rivets of the supporting pad 6. The provision of this centrally riveted connection is an important feature in that the working forces imposed on the vedges of the plate exert a leverage on the outer edges of the sup-porting pad which tend to cause the central portion of the plate to bulge or pop upwardly when in use. To. prevent thisthe central rivet is provided to resist the stresses caused by the working forces imposed on the edges of the plate.

The pad 6 has a depending reduction 8, which receives the wood handle 9 from be.-`

ylow., Thereduction 8 is tapped tohreceive extent that it may be made thinner without the threaded upper end 10 of a screw 1l, which is directed axially through the handle from below. An aluminum collar 12 is mounted on the screw shank between the 5 head lla of the screw and the bot-tom of the 10 clean and unsoiled by plaster or other material deposited on such surfaces, as shownY in Figure 3 of the drawing.

By constructing the hawk plate concave, I secure first the stiffness of a plate ofthis shape as against a flat plate. The plate is thus protected against warping from striking objects tending to deform it, the resistance being greater against tendencies to warp the plate away from the material. The plate is thus tendency to collect the material or retain the same within it rather than permit it to slide or drop olf at the edges. By designing the plate with the concavo-convex characteristic, it assumes a hard degree of stiifness to the sacrificing its strength, thereby saving 'weight and material. Further, the pad 6 constitutes a reinforcement and rigid sup- 30 port for the hawk. It will be noted that this pad has a tapered outer extremity, as indicated at 6a, such extremity gradually meeting the underside of the plate 5. By means of 'this extremity, the plate is supported a maximum distance from the center of the implement; yet, the pad does not extend in full thickness through this distance, but is chamfered for the extremity 6a to reduce material and weight without sacrificing area of support. Also, the tapered joint of the pad with the plate makes for a smooth connection.

It will thus be seen that I have provided a hawk which combines strength, lightness and eiciency. The device. is durable against keeps its shape at all times. It is carried easily, has not delicate parts or joints to loosen or get out of order, and enables the worker to handle it without discomfort.

I claim l. A plasterers hawk including a receptacle plate sunken inwardly of its marginal edges, a supporting pad interlocked thereto on the side opposite said sunken portion, the latter having its margin extended with a thickness reduction, a handle, and an extension of the pad positioned within the handle.

2. .A plasterers hawk comprising a receptacle plate having a substantially uniform concaved receiving face for the purpose of stiflening the hawk, and a handle projecting from its other face and substantially centered with respect to the concavity.

3. A plasterers hawk comprising a recep- Y 55 tacle plate, a longitudinally extending hanin the nature of a receptacle, which has a` the rough usage to which it is subjected, and

dle secured substantially centrally of said plate, and a reduced extension carried by the end of the handle, said extension being adapted to retain the handle out of contact with surfaces on which the hawk may be deposited.

4:. A plasterers hawk comprising a receptacle plate having a substantially uniform concaved receiving face for the purpose of stiifening the hawk, said receptacle plate having a plurality of spaced apertures therein, one of said apertures being disposed centrally of said concavity, a supporting pad secured to the other face of said receptacle plate, a plurality of projections extending from said pad and riveted within said apertures to supplement the stiffening action of said plate, and a handle secured centrally of said supporting pad. u

In testimony whereof I affix my signature.

JACOB BYHRE.

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