US1360892A - Method of making spades - Google Patents

Description

W. H. COWDERY.

METHOD OF MAKING SPADESL APPLICATION FILED IULY31,1918.

Patented Nov. 30, 1920.

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WARREiv if, cowbs t'y' or c r systsppg onio, ssfsiiroitro THE ERICAN FORK AND HOE'COMPANY, F CLEYELAND, oHIo, AooitPoRA'rIoN or OHIO.

mason as massseams.

specification of Lettrs r a tent. Patented N 30 1920 appneauon'aled-rli 31, 1918; Serial 1%. 247,501.

' To all whom it may concern:

Be it known that I, WARREN H. COWDERY, a citizen of the United States, and a resident of Cleveland, county of Cuy'ahog'a, Statof' Ohio, have invented a new and useful Iinprovement in Methods of Making'spades,

of which the following is a specification, the

principle of the invention being herein explained and the best mode in"which"I -have contemplated applying thatprinciple, so as to distinguish it from other inventionsi The present invention, relating, a's'indicated to a method of making spades and similar articles, iscli1-ected "toward an improved method of manufacturing the metal portion of a spade or like article, without the necessity of adding or fastening thereto any such strip as is usually riveted or bolted across the head of the spadeto serve as a foot rest. The common spade is usually provided with a short strip of metal extending transversely across the head of the spade and fastened by riveting or otherwise to the body of the spade proper, andthis of course necessitates a separate formation of these strips and several operations in fastening the same to the spade. Not only is the present method more economical than the ones heretofore in use, but the article as thus manufactured is distinctly superior and has no parts which can become unfastened from the spade proper. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

description set forth in detail one method and one product exemplifying my invention, such disclosed procedure and product constituting, however, but one of the various applications of the principles of my invention.

In said annexed drawing Figure 1 is a plan view of a flat part of stock from which the spade blanks are cut or stamped, the lines of cutting and hence the form of the blanks being indicated in this figure; Fig. 2 is a transverse sectional view of forming rolls in operation upon a previously stamped-out blank; Fig. 3 is a similar view showing slightly different rolls for producing a modified type of spade, both of Figs. 2 and 3 being more or less diagrammatic; and Figs. 4 and 5 are transverse sections througli the head of the spades formed respectively by the roll's of Figs. 2 and 3.

As indicated in Fig. 1 the spade blanks are stamped from a rectangular relatively thin sheet or bar of stock 1, the blanks beingstamped out in an interlocked'relation, and each blank consisting of a rectangular portion 2 and a shank portion 3,-extendin'g' at right angles to'the longest dimensions of the body portion and transversely of the strip of stock.

In my improved method of manufacture I first cut out the blanks and then thin the body portion of the spade from the head end to the lower end or edge of the spade by means of rolls 4 and 5, shown in Fig. 2, which are provided with extending portions 6 and 7, respectively. The outer surfaces of these extending portions are not formed concentrically about the axis of the rolls, but are formed'like cams, so that the ends of the two extensions, which are shown at the right of Fig. 2 are closer together when in contact with the spade 8, than are the two portions 9 and 10, which are shown in this figure as in actual contact with the head portion of the spade. The eccentricity of the extensions 6 and 7 is of course gradual, and is so arranged that the spade 8 is gradually tapered from a relatively slight thickness at the edge 11 to a greaterthickness at the portion 12, while the extensions are formed in unequal lengths, so that the end 9 of the extensionfi will leave the head 12 of the spade before the end 10 of the extension 7 does, and in this way forces the metal Theannexed drawing and the following which has been rolled from the body of the spade to the upper end into a transversely extending shoulder 13 of some width. This shoulder 13 is shown in transverse section in Fig. 4. After the blade of the spade has thus been graduated as to its thickness throughout its length the spade is hammered or otherwise forged into the proper duce oppositely extending shoulders 18, as

better shown in Fig. 5. Otherwise the ac tion of the rolls l4 and is identical in function-with the operation of the rolls a and 5, which I have previously described, and the subsequent treatment of the partially. formed spade blank is also the same.

By thus utilizing the metal which is rolled from one end'of thespade to the other for the formation of a broadened head for the spade body, I have found it possible to make this head edge of sufficient width to serve as afoot rest or support, which is as V satisfactory asthefastened support and is have to be fastened on during-the manufacture and cannot'come loose dur ng the use of the spade, no matter how severe is this use.

Other forms ing the features of my invention instead of the one here explained, change being made in the form or construction, provided the may be employed embodye elements'stated by any of the following claims or the equivalent of such stated elements be employed, whether produced by my preferred' method or by others embodying steps equivalent to those stated in the following claims.

V I therefore particularly point out and dis tinctly claim-as my invention y 1. The method of jmaking spades which consists in rolling a spade blank longitudinally to force the metaltherein to flow to-V ward the head end, and forcing some of such metal laterally to form a'fiange along the head end of such spade blank; r

r 2. The method ofmaking spades which consists inrolling a spade blank longitudinally between eccentric rolls to force the metal thereinito flow toward the head end, and forcing some of such 'displacedmetal laterally to form a flange along the head end of such spade blank. r

VSig'ned by me, this 26 day of July, 1918.

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