US1423775A

US1423775A - Spade

Info

Publication number: US1423775A
Application number: US383786A
Authority: US
Inventors: Emil W Mundt
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-05-24
Filing date: 1920-05-24
Publication date: 1922-07-25
Anticipated expiration: 1939-07-25

Description

E. WPMUNDT.

SPADE. APPLICATION FILED MAY 24, 1920.

Patented July 25, 1922.

ATTORNEY STATES earner creme.

EMIL W. MUNDT, OF BERNARDSVILLE, NEW JERSEY.

Application filed May 24,

To all whom it may concern:

Be it known that I, EMIL W. MUNDT, citizen of the United States, residing at Bernardsville, in the county of Somerset and State of New Jersey, have invented certain new and useful Improvements in Spades, of which the following is a specification.

This invention has relation to digging tools and has for an object to provide an improved spade wherein the blade is formed of a single .piece and having as its main characteristic a back reinforced edge which is formed by beveling or bending the material of the blade upon itself, thus decreasing the cost of manufacture of such tool.

In addition to the foregoing this invention com prehends improvements in the details of construction and arrangement on parts to be hereinafter described and particularly set forth in the appended claim.

-In the accompanying drawings in which similar and corresponding parts are desig nated by the same characters of reference throughout the several views in which they appear.

Figure 1 is a View in perspective of a digging tool constructed in accordance with my invention.

Figure 2 is a fragmentary view in edge elevation, and

Figure 3 is a fragmentary view in rear elevation of the blade.

With reference to the drawings, 10 indicates the blade of a digging tool, as illustrated in the drawings preferably in the form of a spade. The material of the back edge is cut away at 11 at a point intermediate the side edges of the blade and the portion of the back edge thus left is bent backward at the point 12, and again forward at the point 13, the point of flexure at both ends being arranged in such a manner that the distance between the point of fleXure 12 and. the point of flexure 13 is equaled to the distance between the point of flexure 12 and the extreme terminal edge of the blade. It is also preferred that the bent edge of the blade be curved transversely as shown in Figure 2. Ameans for connecting the handle to the blade is provided in the nature of a plate 14 which is secured to the rear side of the blade by means of the rivets 15, braz- Specification of Letters Patent.

SPADE.

Patented July 25, 1922.

1920. Serial No. 383,788.

ing, or any other manner and said plate is then formed with a semicircular sleeve 16 by bending the material around a mandrel or other object, permitting said sleeve 16 to project through the cut-away portion 11 of the back edge of the blade. This structure is duplicated at the front of the blade and the edges of the semicircular sleeve 16 are crimped together forming a tubular sleeve. A wooden handle or the like 17 is then inserted in the sleeve 16 and held in any suitable manner. have provided a blade which may be formed primarily in one piece, and by means of a die thus eliminating the necessity of forming the blades in layers or sections in the.

manner heretofore adopted. A considerable saving of labor is effected by the use of the method of forming the blade described above, in addition to the durability ensured by the sleeve arrangement described. strengthening, as it does the point of connection between the blade and handle.

While I have illustrated and described my invention with some degree of particularity, I realize that in practice various alterations therein may be made. I therefore reserve th right and privilege of changing the form or the details of construction or other wise altering the arrangement of the correlated parts without departing from the spirit of the invention or the scope of the appended claim.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is A spade, comprising the blade having its upper edge cut away at a point intermedi ate the side edges of the blade to form a recess, the remaining portions of the upper edge of the blade being curved and bent at right angles, and said bent portion again bent upon itself to define a curved, heel engaging reinforced upper edge for the blade, a pair of concave plates applied, one to each side of the blade with their concave sides directed toward each other and in registration with the recess, and a handle entering said recess and the space between said concave plates.

In testimony whereof I affix my signature.

EMIL W. MUNDT.

Thus, it will be seen that I