US1031406A - Plasterer's darby. - Google Patents

Description

W. A. WHITMAN.

PLASTEEER'S DARBY.

APPLICATION FILED 11:11.17, 1911.

1;031,406. Patented Ju1 2; 1912.

Inventor:

Witnesses:

M m WEBUR A. IWI/JTMM a Hfi IWWZM,

' A torneys COLUMBIA PLANOGRAPH co., WASHINGTON, D. C.

UNITED STATES PATENT OFFICE.

WILBUR A. WHITMAN, OF WHEATON, ILLINOIS.

PLASTERERS DARBY.

To all whom it may concern Be it known that I, VVILBUR A. WVIIITMAN, a citizen of the United States, and resident of WVheaton, in Dupage county, State of Illinois, have invented certain new and useful Improvements in Plasterers Darbies; and I do hereby declare that the following description of my said invention, taken in connection with the accompanying sheet of drawings, forms a full, clear, and exact specification, which will enable others skilled in the art to make and use the same.

This invention has general reference to improvements in plasterers darbies; and it consists, essentially, in the novel and peculiar combination of parts and details of construction, as hereinafter first fully set forth and described, and then pointed out in the claim.

In the drawings already referred to, which serve to illustrate this invention more fully, Figure 1 is a perspective view of my improved plasterers darby. Fig. 2 is a front-view of a portion of the same, the figure being drawn on a slightly increased scale. Fig. 3 is an end View of the same in section on line 00 w of Fig. 2. Fig. 4: is an edge-view of the same. Fig. 5 is a View of a plasterers straight edge constructed in accord with my invention. Fig. 6 is an endview partly in section, of the device shown in Fig. 5.

Like characters and symbols of reference designate the same parts in all the figures.

A, in these drawings designates the board of a plasterers darby. It is usually about 12, 13, of the working surface 0, thereof, so

that this tool soon becomes useless.

To prolong the life of this tool, and at the same time to enable a workman to produce plastic surfaces of superior quality and smoothness, which is the object of this invention, I provide this darby with inserted metallic working edges which are produced by sawing longitudinal slots in the board A, reaching from the working edges 12, 13, angularly to the working face C, for a dis- Specification of Letters Patent.

Application filed February 17, 1911.

Patented July 2 1912.

Serial No. 609,172.

tance, and placing in these slots metallic strips D, of proper thickness and width, and preferably made from non-ferrous sheet metal, such as brass, copper, and the like material. These strips D are retained in the longitudinal slots by preferably brass nails or so-called escutcheon pins, copper nails, &c., E, which are driven from the working face of the board through the board and the metallic strips, and clenched on the back of the board, as shown at 14, in Figs. 1, 3, and 6, the heads 15 of the nails being buried in the wood, as illustrated in Fig. 3, so that the working face of the tool presents a perfectly smooth surface. By supplying this darby with the metallic working edges, I accomplish the desirable results of increasing the durability of the tool without detracting from its necessary flexibility, and at the same time enable better and smoother work being produced thereby.

In the plastering trade there is also a tool much in use known as a straight edge, which tool is illustrated in Figs. 5 and 6, and which is also used for leveling plastic surfaces by scraping, the same as the darby. In this tool I saw two slots angularly to each other from the working edges 12, 13, and locate therein the two metallic strips D, and fasten these strips by means of the non-ferric nails E, as heretofore described with reference to the darby construction.

It will be observed that by inserting the metallic strip in the body of the board from the corners of the working face, I attain the advantages that the entire working face is of wood while the two Working edges 12, 13, only, are of metal and which metallic edges do not project beyond either the face or the two longitudinal edges which are at right angles to the working face, thereby retaining the desirable qualities of a wooden darby and adding thereto the advantageous feature of preserving the working edges of the darby.

I prefer to employ non-ferric metal for the strips D and the nails E, for the reason that these parts are not subject to corrosion I have heretofore stated that as a means.

for securing the metallic strips in the body of the darby I employ non-ferric nails, but it is evident that other analogous means may be substituted for the nails without depart-in from the scope of this invention. I have a Iso stated that the straight edge is used by lasterers, but it is also employed by concrete workers in laying side walks and for other similar work.

Having fully described this invention, I claim as new and desire to secure to me by Letters Patent of the United States A tool of the type set forth, consisting of a flat wooden board of rectangular cross section said board being formed with a pair of comparatively deep longitudinal slots Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

which incline from the front longitudinal In testimony that I claim the foregoing I as my invention, I have hereunto set my hand in the presence of two subscribing Witnesses.

WV. A. WVI-IITMAN.

WVitnesses I MICHAEL J. STARK, FRIEDA T. LEBERSTEIN.

Washington, D. 0.

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