US833354A - Earth-auger. - Google Patents

Description

PATENTED OCT. 16, 1906.

C. L. TUTTLE. EARTH AUGER.

APPLICATION FILED JAN. 22, 1906.

mm w d MW v UNITED STATES & CHARLES L. TUTTLE, OF ROCHESTER;

NEWV YORK.

EARTH-AUGER.

Specificationof Letters Patent.

Patented Oct. 16, 1906.

Application filedJanuery 22, 1906. Serial No. 297,305.

To all whom it may concern:

Be it known that I, CHARLES L.-TUTTLE,

of Rochester, in the county of Monroe and State of New York, have invented anew and useful Improvement in Earth-Angers, which improvement is fully set forth in the following specification and shown in the accompa- .nying drawings. 1

My present invention is intended as an improvement upon the post-hole augur shown and described in Letters Patent No. 645,222, issued to me March 13, 1900.

The improved earthauger herein shown and set forth is more simple in construction than the one described in said Letters Patent, more durable, and less liable to break or give out at the lower part of the shaft. One object of my present invention is to construct the anger with parts more simple and durable than shown in said Letters Patent.

Another object of the invention is to construct the spiral draw-bit with a quick twist and independent of the shaft and pass it upwardly through the head of the auger and connect it with the shaft above the head.

Other objects and advantages of the invention will be brought out and made to appear in the following specification and the novel construction more particularly pointed out in the appended claims, reference being had to the accompanying drawings, which, with the reference characters marked thereon, form a part of this specification.

Figure 1 is a plan of the auger with the shaft transverselysectioned and a part broken away. Fig. 2 is a view of the auger from beneath. Fig. 3 is a side elevation of the device seen as indicated by arrow 3 in Fig. 1, a part being shown in two positions by full and dotted lines. Fig. 4 is a side elevation seen as indicated'by arrow 4 in Fig. 1, a part being axially sectioned and a part broken away. Fig. 5 shows the gimlet-point or hit and the head-bar, with other parts omitted, parts being broken away and centrally longitudinally sectioned. Fig. 6, drawn to a small scale, shows the upper end ofthe shaft and the handle, parts being broken away and longitudinally sectioned.

Referring to the drawings, G represents the head of the auger, it being substantially circular in plan, comprising a horizontal head-bar A diametrically disposed. To the under flat surface of the head-bar and at the end portions thereof are secured by bolts (1 bar A and has two oppositely-disposed horizontal blades or cutters B3. The bar'A is commonly formed. with a hub b, pierced centrally by the bit C, which is threaded in the bar, so as to be aXial-withthe head G and longitudinally adjustable therein. The bit extends above the upon its upper end an internally-threaded coupling or sleeve d, adapted to receive within its upper end the lower. threaded end of'a stale or shaft D for turning the augur. The shaft D is hollow, as of gas-pipe, and of a length to have'its upper end in convenient reach of the operator, the up er end being provided with a horizontal ho ow handle T, Fig. 6, similar to that shown in said Letters Patent, for turning the auger. The shaft D and the bit O are coa'xial and have their adjacent ends closely abutting within the sleeve d, as clearly shown in Fig. 4, the said threaded parts A, C, d, and D being firmly screwed together or so rigidly turned against one another as to constitute practically a single solid piece.

Above the cutters B B are placed a pair of sectoral quadrantal plates E E, Fig. 3, alternated with the cutters in the plane of the head G, the plates overlapping at their edges the cutting edges of the blades. There are spaces 0 s between the plates and the associated cutters, the plates being straight or flat and held to the upper side of the bar A by hinges e e, Figs. 1 and 4, on opposite sides of the bit 0. The cutters are formed at their extreme outer edges with upturned lips f f, Figs. 1, 3, and 4, upon which the respective plates E 'E rest at their outer edges, as shown.

The bit O is made hollow at its upper threaded end, as clearly shown in Fig. 5, which, with the hollow shaft D, forms a passage for the downflow of air through them, opening out through perforations 9 (see also Fig. 3) in the bit below the head G. This is to assist when withdrawing the loaded auger from the hole formed in the ground. The spiral-pointed end of the bit is also formed thin and fiat and with a quick turn or twist, as shown, which serves better to draw the auger downward when boring than the slow threaded conical point employed in the auger shown and set forth in the Letters Patent above mentioned. This flattened form of the spiraled part of the bit, with rapid lead of twist, causes the bit to hold within its open roomy spirals a large mass of earth and so get a better hold upon the ground when boring.

' What I clairn as my invention, and desire to secure by Letters Patent, is

1. An earth-auger comprising a circular head having a diametral bar with cutters secured thereto, and plates held by the bar overlapping the cutters, the vbar having an axial threaded opening, and a spiral bit with threaded portion projecting upwardthrough the bar, a threaded sleeve on the bit above the bar, and a shaft with threaded end inserted in the sleeve, the ends of the shaftand the bit abutting above saidzbar, and ahandle on the shaft.

2. An earth-auger comprising a circular head havin a diametral bar with axial opening, a spira bit threaded through said opening, a sleeve on the bit and a shaft in the sleeve coaxial with the bit and abutting thereagainst, said bar, the shaft, the sleeve and the bit being joined rigidlyas a single body, apair of sectoral cutters secured to the under side of thebar on either side oft-he bit, and a pair of straightsectoral plates secured movably on the upper side of the bar on either side of the bit and resting upon .portions of the respective cutt'ers,and a handle for the shaft, there being a passage for the flow of air through theshaftand associated parts, leading out'beloWthehead.

3. An earth-auger having a circular head with a diametric bar, a pair of cutters secured to the under surface of said bar, a pair of sectoral quadrantal plates secured to the upper face of saidbarabove the cutters and at their edges overlapping the cutting edges of the cutters with spaces between said plates and cutters, said cutters being formed at their extreine outer edges with which said plates at their outer edges rest, hinges connecting said plates to the bar, a sleeve, a bit having a spiral point and a threaded portion engaged in said bar and sleeve, and ahandle having a threaded shaft engaged in said sleeve.

In witness whereof I. have hereunto set my hand, this 18th day of anuary, 1906, in the presence of two subscribing witnesses.

I CHARLES L. TUTTLE. Witnesses:

.E. B. WHITMORE, A. M. WHITMORE.

upturned lips upon

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