US1241665A - Earth-boring machine. - Google Patents

Description

J. F. SAUERMAN.

EARTH BORING MACHINE.

APPLICATION FILED JUNE 8.1917.

1,241,665. Patented Oct. 2,1917.

53' LFM IV flg g e TH. lf'iil) Z1 i 5 IE1 J 3% @K1CPM JOHN F. SAUERMAN, 01? LITTLE ROCK, ARKANSAS, ASSIGNOR OF FORTYv-EIGHT ONE- HUNDREDTI-IS TO BEN D. SCHAAD, OF LITTLE ROCK, ARKANSAS.

EARTH-BORING MACHINE.

Specification of Letters Patent.

Patented Oct. 2, 191 '7.

Application filed. June 8, 1917. Serial No. 173,454.

I To all whom it may concern:

Be it known that 1, JOHN F. SAUERMAN, a citizen of the United States, residing at Little Rock, in the county of Pulaski and State of Arkansas, have invented a new and useful Improvement in Earth-Boring Machines, of which the following is a specifioation.

This invention relates to earth boring machines especially designed for digging post holes, and has for its object to provide an improved light portable machine of this kind in which the boring tool may be ro tated by motor and moved axially by hand, whereby the feeding of said tool down into the earth may be easily regulated according to the hardness of the strata through which it is passing, and the danger of choking or injuring the tool is avoided.

Another object is to provide for taking up slack in the hand operated means for moving the tool axially, and a further object is to automatically lock said means against reverse movement while the tool is being fed into the ground.

The invention will be first hereinafter described in connection with the accompanying drawings, which constitute part of this specification, and then more specifically defined in the claims at the end of the descrip tion.

In the accompanying drawings, wherein similar reference characters are used to designate corresponding parts throughout the several views:

Figure 1 is a broken front elevation of a boring machine constructed substantially in accordance with this invention, the sprocket chain for moving the tool axially being omitted.

Fig. 2 is a broken side elevation of the machine.

Fig. 3 is a section on the line IIL-III of Fig. 1, showing the squared tool feeding rod engaging a similarly shaped passage through the horizontal gear.

Fig. 4 is a section on the line IV-IV of Fig. 1, drawn to a larger scale, and Fig. 5 is a detailed rear face view of the cross head and guide track therefor, also drawn to a larger scale.

The boring mechanism is mounted on a pair of parallel beams 1 supported on axles 2 carrying wheels 3, and constituting a light portable truck on which said mechanism may be readily moved about. At one end of the truck a transverse frame 4 is fastened to the beams 1 and providcdwith a vertical journal bearing in which is fitted the hub 5 of a horizontal bevel gear 6. Said hub projects below the journal bearing and is fitted with a collar 7 secured by a bolt 8 for retaining the hub and gear in proper position.

The frame 4 is further provided with a horizontal journal bearing for a shaft 10 carrying a bevel pinion 9 and pulley 11. The pinion 9 meshes with the gear 6, and the pulley 11 is connected by a belt 12 with any suitable motor conventionally indicated at 13, Fig. 2. The gear 6 and hub 5 have an angular, preferably square, passage extending centrally and vertically therethrough, and in this passage is fitted to slide a rod 14 angular or square in cross section and having a socket 15 at its lower end in which a boring tool 17 may be detachably fastened by a clamping bolt 16. From the foregoing it will be seen that the boring tool 17 rod 14 and gear 6 may be rotated by the motor 13 through the belt 12, pulley 11, shaft 10 and pinion 9.

The upper end of the rod 14 is rounded, as at 18, and said rounded portion is fitted to turn in a cross-head consisting of a metal central portion 19 and wooden endportions 20, best shown in Fig. 4. The Wooden end portions of the cross-head are adapted to slide in vertical parallel angular guide rails 21 which may be made of a single piece of channel iron bent at the middle and having its ends suitably fastened to the top of the frame 4, as illustrated in Fig. 1. Collars 22 and 23, respectively, are placed on the round portion 18 of the rod 14 below and above the cross-head, and they and the crosshead are held in position by a lock nut 24 on the upper extremity of the rod.

To manually move the rod 14 axially in its bearing in the gear 6 and hub 5, a shaft 25 is journalcd horizontally in bearings 26 on the frame 4 and provided with a hand crank 27 at one end and a sprocket wheel 28 at an intermediate point in line with the rod 14. A sprocket chain 29, Fig. 2 is passed around said sprocket wheel 28 and has one end fastened to the cross-head 19 by a bolt 30. The other end of the sprocket chain is passed over a sheave 31, mounted between the upper ends of the guide rails 21 above the cross-head, and attached to a hook 33 on The shaft 25 alsocarries a ratchet wheel- 88 which may be engaged by a gravity pawl 37 pivoted between ears or lugs 36 on the frame 4 for retaining the rod 14 and tool '1 7' inelevated' position and preventing the feeding thereof into the ground== Then it is desired to feed said rod and tool clownwardly, as during the boringoperation, the pawl37 maybe swung back away from the ratchet wheel, as willbe readily understood. Having thus described my invention, what I claim as new and desireto' secure by Let ters Patent ofthe United States is: y

1. In an earth boring machine, the combination with a rotatable and axially movable boring tool,of means for rotating said tool, a cross-headoperatively connected to said tool, guide rails'for the cross-head, means for moving the tool. axially including a sprocket whe eland chain, and a sheave supported by said guide rails above the cross head, said chain being fastened at its ends to the cross-head and having one end portion passed over said sheave. 1 2.111 an earthboring machine, the coinbination with a rotatable and axially mov able, boring tool, of means for rotating said tool, a cross-headoperati'vely connected to the tool, guide rails for the cross-head, a

sheave supported by said guide rails above the vcross-ll'ead, a rotatable sproclret' wheel, a sprocket chain engaging said sprocket wheel and passed over said sheave, the ends of saidchain being fastened to said cross-head,

and plate" adjustable on the cross-head,

and connected to one end of the sprocket chain, whereby slack may be taken up in said chain.

above the cross-head, a rotatable sprocket wheel, a sprocket chain engaging said wheel and passed oversaid shca-ve,:the ends of said chain being fastened to said cross.- head', a plate adjustable on the cross-head,

passage therethrough, a rod angular in cross secti'on fitted in saidpassage in the gear, means for rotating. theagear, a cross head; operatlvely connected to the tool,

.meansffor guiding the cross-head, a sheave supported by said guiding means above the cross head, a shaft alsojournaled in the frame v means for rotating, said shaft, a sprocket wheel on said shaft, a sprocket chain engag1ng sa d sprocket. wheel and passed over said sheave, the ends of said' chain beingconnected to the rod for moving the same axially, aratchet wheel'also mounted "on saidshaft, and a pivoted pawl normally held by gravity in engagement with,

said ratchet wheel for the purpose specified.

JOHN F." SAUERMAN.

, and a hook on said plate adapted to -engage V states of u'fistmhfi may be obtained for fi've cents earn, 5/ add'r'ssizig' the Commissioner at time,

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