US280585A - Post-hole-digging machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. B. CRAWFORD.

POST HOLEDIGGING MACHINE.

No. 280,585. Patented July 3, 1883.

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(No Model.) 2 SI 1eetsSheet 2.

-B. CRAWFORD. 7 POST HOLE DIGGING MACHINE.

No. 280,585. Patented July 3, 1883.

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proved machine for digging post-holes.

UNITED STATES PATENT OFFICE.

BURTON ORAWVFORD, OF CROSS ROADS, OHIO.

POST-HOLOE-DIGGINLG MACHINE.

SPECIFICATION forming part of Letters Patent No. 280,585, dated July '3, 1883.

Application filed May 9, 1883. (No model.)

To aZZ whom it may concern.-

Be it known that I, BURTON CRAWFORD, of Cross Roads, in the county of Madison and State of Ohio, have invented certain new and useful Improvements in Post-Hole-Digging Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which Figure 1 is a perspective view of my im- Fig. 2 is a front elevation of the same. Fig. 3 is a sectional detail view through a part of the auger shaft with its "collar and collar-catch; and Figs. 4 and 5 are detail views, respectively, of the catch in the top part of the frame, and of the lever and eccentric for operating the rackbar.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to apparatus for digging post-holes; and it consists in the detailed construction and combination of parts of a machine of that class, as hereinafter more fully set forth, having for its object to bore a hole of any desired depth by the exertion of a minimum of power, and also to provide for the easy extraction of the auger from the hole.

In the accompanying two sheets of drawings, A indicates a vertical frame, which has ways a, and is fixed upon a truck, B, having wheels 0 and tongue D. At the lowerend of one of the side pieces of frame A is pivoted upon a bolt, 6, the rack-bar E, which has an enlargement, F, through which is inserted the eccentric G, which is provided with a handle, 9, for turning it. The eccentric G and rackbar E are so arranged relative to each other that by turning the handle 9 the rack-bar may be moved forward or back, so as to throw it into or out of gear with the gear-wheel H of the sliding frame I. The latter is by preference of the shape shown in the drawings, bent at its upper end to form an arch, J, adapted to engage the spring-catch K, which is secured in the top cross-bar of the frame A and operated by a handle, k. By moving this handle forward in the direction of the arrow, Fig. 4,

the catch or hook at its lower end is withdrawn from frame I J, so that this is allowed to drop in position for operating the machine. The sides I of the sliding frame I J is provided with lugs or catches a, which fit into the grooved ways a in the sides of frame A.

L is a collar, which turns in bearings Z Z in the cross-bars of the sliding frame. This collar has a springcatch, M, which is adapted to engage holes a in the auger-shaft N, as shown more clearly in Fig. 3 of the drawings, so that by disengaging the catch from the auger-shaft frame I J, with its appurtenances, may be moved up or down upon shaft N.

The mechanism for rotating the auger-shaft consists of the drive-wheel H, which is operated by a crank, h, and meshes with the bevelpinion O, fixed upon the top of collar L. To facilitate the operation of the machine I use a fly-wheel, P, having a bevel-wheel, p, which also meshes with pinion O.

From the foregoing description, taken in connection with the drawings, the operation of my machine will readily be understood .with out requiring extended explanation.

In moving the machine from place to place, the sliding frame I J is suspended upon the spring-catch K at the upper end of the fixed frame A.

WVhen it is desired to use the machine, the auger-shaft N (which may be provided with an anger of any approved construction) isinserted into collar L, and held in place therein by means of the spring-catch M. The frame is then lowered by releasing it from the catch orhook K, when of its own weight it will fall down, so as to bring the auger in contact with the ground, when the hole is started by turning crank h. After a hole about one foot in depth has been bored, collar L is released to engage the teeth of the drive-wheel H, when,

by turning crank 71, the anger is lifted out of the hole.

Having thus described my invention, 1 claim and desire to secure by Letters Patent of the United States- The combination, in a machine for digging post-holes, of the fixed frame A, mounted upon the truck 13, and having grooved ways a, rack-bar E, pivoted at the lower end of the frame, eccentric G, adapted to throw the rackbar forward and back, spring-catch K, secured in the upper part of the fixed frame, sliding frame I J, having guide-lugs i and bearings I I, collar L, having spring-catch M and bevel-pinion O, drive-wheel H, having crank 71, baianee-whec1 P, having beve1-pinion 1), and auger-shaft N, provided with a se ries of apertures, n, the whole constructed and combined to operate substantially in the manner and for the purpose herein shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

BURTON CRAWFORD.

Witnesses:

\VILLLUI WILLLuIsoN, dnNJ'AMIN CARSON.

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