US1271287A - Digging-tool. - Google Patents

Description

E. DALY.

DIGGING TOOL.

APPLICATION FILED IULYH. 19x1.

Patented July 2, 1918.

Emma! .2749

EDMUND ruunr, orlirnw MONTEREIY, cALIFonN'iAL V i I eminence} I To all whom it maycomem: 1 1 j Be it known that I, EDMUND Dar/13a citizen of the United States, residing at-New 'Monterey, in" the {county of Monterey. and

. State of California, Y have invented certain new and useful "Improvements in Digging Tools, of whic'hth'e following isa specifica "tion;

This invention has ranians digging tool's, and has for an -object to'provide' a spade, oncombinedspade and shovel, constructed and shapedina manner to permit the digging ofa'narrow' trench to receive water and-gas pipes; electric conduits or the like.

vide means whereby my improved fdigging tool may be mountedon" a-handle, and adjusted r tive y th re oh qr ythe ng e. 'of the tool'as the" depth ofthe'tr ncn im; creases, or according to Whether the tool is" used for digging or for elevatingearth from the bottom of the trench.

In addition to the foregoing, this invention comprehends improvements in the details of construction and arrangement of parts, to be hereinafter described and particularly pointed out in the appended metal. v g t compared to its wldth, a wldthf of approxie claims.

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 s1de elevation of a trench digging tool, constructed and formedin accordance with my invention.

Fig. 2 1s a view thereof In plan.v

Fig. 3 is a view thereof in rear elevation, and

Fig. 4 is a vertical sectional View, taken on the line 44 of Fig. 1. 7

With reference to the drawmgs, 10 1ndicates as an entirety the blade of the tool which may be cast or pressed from sheet The blade. is extremely narrow as mately two inches being suflicient for all practical purposes; the width will however' depend upon the use to which the tool is to be put. A length of approximately five or six times the width affords a proper pro portion in the dimensions. V

The outer end of the tool is formed with a straight edge 11, and the toolis curved retiree-rd from said edge with. a gradual H Spcilicationof Letters Iatent. U

Another object of the invention is pro- Application filed any 17, 1917. Serial mlj s uoi'; 1

curve for about two thirds. of: its length,

whereupon the degree of curvature increases more abruptly 'sothat the inner surface of therear end of the'tool is'at approximately 5 PatentedJuly 2;

right angles to the inner surfacethereof at v the outerend. The depth of thetool increases from nothing at the edge ll' toithe point of greatest; curvature where the depth also reaches its maximum asindicated'atjIQ.

The depth again decreasestoward therear f as indicated.

q The rear a d er areas is 'formed with 14;. which also passes through a longitudin ly, ex n ing. sl t. n ones nd 39f ,a f handle 16." A, wing nut 17 "applied to the threaded end of the bolt serves to retain the bolt against displacement and to bind the ears against the handle. The'said end of the handle is provided with an axially extending pin 18 which is engaged in any one .7 of a series of vertically spaced Openings 19 provided in the rear end of the blade. It will be apparent that by engaging the pin in any one of the openings, the angle of the blade relatively to thehandle may be varied,

and the slot 15 is provided to permit the pin "endwhere thetoolfis very shallow; A: rib f13 .l'sg fo'rmed upon the under" side of the lads and extended longitudinally thereof pa rabfg pw d ou v dl e tend ng e '13, formed with apertures toreceive a bolt to be withdrawn from one opening for insertion in the next. g

The primary object of my invention is to provide a tool for digging trenches in which to lay pipes, conduits or the like. 'In accordance with present practice a trench of about twelve inches is dug in which to receive a pipe of from two to three inches in diameter, thus entailing an extra amount of labor in the removalof the earth. A trench of this width is necessitated in view of the inches. 7 My object therefore is to provide a, tool. which may enable a'trench to be dug which will be no wider than the diameter of -width of the shovelused which is about nine the pipe or other article to be-laid. For this purposethetoolI have disclosed is highly eflective. The straight edge on the outer end serves toipenetratefthe earthfand the sharp corners insure the digging of a trench withfstraight parallel walls. The tool may 7 furthermore be adjusted so that its --1ineal dimension coincides more nearly wlththe axis of the; handle when-the blade is lsed for digging; or the angle may be increased whentheblade is used to elevate earthfrom the bottom of the trench. The long handle,

by engaging the wallsofithe.trenehi'serves' vpart ,Ne -15 U a cla ms.

de r ii r in 1 9- sp el P 10 if 'h i th arpe de h imie .i

i des ib s imy i v et n, what I @ima n i e i t se u ey new man is;

f1. dig fng tool, inelndinga long narrow bladeQhziizifig a .straight 'ehisel edge on t 'emergedhan ade c r eflfe hey rearward, "the curvature increasing toward the, rear,.end nntil I the inner snrfaoe loft; the bl i -l m n Sa kfi l fl ld is i ;@PI 9 i el r a e ow ih iwf ee asl- 2. Adigging tool, including ablade which is'long and narrow, curved slightly toward "tlleirillrendiand ha'ving a straight edge at its outer end, the curvature increasing abruptly at the rear end, the blade being also curved transversely, at a maximum ad- "jacentthe point of greatest longitudinal enrvatnre, becoming shallower toward both ends.

A digging ea i e adies bl d ah .ing a pair of spa-ee'd ears and a series of spew d e en i th ,bla i i e we h e2 12s, .a handle pivoted; between, therearsand ,li'evixi kE. i i 'diea isle i hreu h which the rim e tends, and tel-Ir na 11. th en [of -thihan-dle t ente a e o th ope in of th blade to hold thesalne rigidrelative =..wth. han le theme: b i e me bl in any; sine -tl eqpe ns t a h a gleo ille blede a a n-.-it e m9ny whene filrafii m i at the r enep we W tn s EDMUNDDALY. W itnesses;

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