US927723A - Stone-drill. - Google Patents

Description

,0. E. HALL.

I STONE DRILL. APPLIUATIQN FILED APR. a, 1908.

927,723. Patented July 13, 1909.

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5 a Q: 3 G 60 57 42 JIE JQI I \Q 8 l J wvenip'c 1 Hail. wihwoozo 20 2 attozmag CARL E. HALL, OF ATWATER, MINNESOTA.

STONE-DRILL.

Specification of Letters Patent.

Patented July 18, 1909.

Application filed April 8, 1908. Serial No. 425,943.

T 0 all whom it may concern:

Be it known that l, CARL ll. T'TALL, a citizen of the United Ht ates, residing at .\twater, in the county of Kandiyohi and State of lilinnesota, have invented certain new and useful improvements in Stone-Drills, of which the t't'illmving is a specification.

This invention relates to drills and more particularly to stone drills and has for an object to provide a drill especially adapted for use upon farms and which may be operated manually.

A further object of this invention is to provide a drill with revoluble hammers operable against the upper end of an oscillating drill shank.

A further object of this invention is to provide means for adjusting the bed plate of the drill whereby the drill bit may be driven at the desired angle into the ground.

Other objects and advantages will be apparent from the following description and it will be understood that changes in the soecific structure shown and described may be made within the scope of the claims without departing from the spiritof the invention.

In the drawings forming a portion of this specification, and in which like characters of reference indicate similar parts in the several views, Figure 1 is a side view of the present drill, Fig. 2 is a top plan view, Fig. 3 is an end view, Fig. 4 is a detail horiyontal sectional view on the line '4 oil Fig. 1, Fig. 5 is a horizontal sectional view on the line 5-5 of F 1, Fig. 6 is a transverse sectional view on the line 6 6 of Fig. 2, Fig. 7 is a perspective view of the bit holder.

Referring now more particularly to the drawings, there is shown a drill 1O comprising a bed plate 11 having transversely extending rods 12 and 13 respectively adjacent its ends. Each rod is provided at each side of the bed plate with a circular plate 14 having a corrugated outer face 15. The ends of the rods outwardly of each plate 14 are provided with similar revoluble plates 16 having corrugated inner faces 17 for adjustable coengagement with the corrugations ot the plate 14. The rods are threaded at their outer ends, and these threaded portions receive thumb nuts 18 for holding the plates engaged with each other.

The plates 16 are provided with socket members 19 arranged to receive legs 20 pro vided with usual slidablc extensions 20 and having toothed edges 21 engaged with pawls 22 carried by the bed plate ll. The legs are thus adjustable vertically and by means of the plates it and 16 respectively it is obvious that the bed plate may be adjusted angularly with relation to the legs.

The bed plate 1.1 is provided with brackets 23 and Q-l: respectively, and journaled in the upper ends oi these brackets there is shown a transversely extending shaft 25 provided at its end outwardly o'l. the bracket 22-) with a gear wheel 26 in mesh with an idler gear 2?, and this gear 27 is in mesh with a drive gear 28 provided with a crank handle 25), as shown.

The shaft 25 is provided at its center with a fixed arm 30 provided at each end with a hammer 31 pivoted to the arm 30 as shown at 32. Stops 33 are carried by the arm 30 and are arranged to limit the inward movement of the hammers 31.

The bracket 23 is provided with an outwardly extending arm 34, and located at the outer end of this arni there is shown a plate 35 arranged in parallel relation to one end of the bed plate. The plate 35 is provided adjacent its outer end with a vertically dis- ]posed passage arranged to receive senilcircular depending portions 37 and 38 respcctivcly of bit holding sections 39 and 40 respectively which are hingedly connected as shown at 41. The sections 39 and 40 when closed, form a circular head 42. The sections 39 and 40 respectively are provided with angular notches 43 which forming a passage receive a vertically disposed bit 44. The head 42 of the bit holder is provided with a peripheral series of ratchet teeth 45, above which there is shown a circular groove 46 arranged to receive a spring pressed finger 47, carried by a guide plate 48 secured to the plate 35, serving to prevent upward move ment of the bit holder. The section 39 carries a resilient toothed catch D, detachably engaged with a suitable recess in the opposite section, and arranged to lie flush with the peripheral face of the head, as shown in Figs. 4 and 7.

An oscillating band 49 is arranged to encircle the bit holder, and this band is movable in the guide 48 and in similar guides 49 which are also carried by the plate 35. The

band is provided with a spring pressed dog- 50 engaged with the ratchet teeth 46 of the holder. The band is also provided with an outwardly extending arm 51 which carries at its outer end a plate 52 having an inwardly directed reduced portion 53, and formed upon the outer end of this reduced portion there is shown a spherical member 5% which receives the socket 55 carried by a reciprocating arm 56. The arm 56 is thus universally connected at its lower end and at the upper end, this arm is connected in a like manner to a crank wheel 57 mounted upon a stub shaft 58 carried by the bracket 24. The stub shaft 58 is provided with a gear wheel 59 in mesh with a gear wheel 60 carried by the shaft 25. The bit 44 is disposed in a passage formed in the outer end of a plate 61, which is slidable in guides 62 carried by the bed plate 11. The plate 61 is provided with a set screw 63 engaged with the upper surface of the bed plate.

It will thus be seen that a simple, efficient and inexpensive drill is provided which may be conveniently driven by manual power, and by the connections shown and described it will be seen that during the oscillating movement of the bit the arms 30 will be re volved, carrying therewith, the hammers 31 which will in turn strike the upper end of the bit and thereby facilitate its movement into the ground.

What is claimed is:

1. A drill of the class described comprising a frame, including a bed plate, circular plates secured to the sides of the bed plate, and having corrugated outer faces, transversely disposed rods carried by the bed plate and having their inner ends disposed through the circular plates, plates carried by the rods and having corrugated faces adapted for clamping engagement with the first named corrugated faces, adjustable legs carried by the last named plates, said plates and legs being adapted for adjustment of the bed plates at various angles with respect to the perpendicular, while retaining the legs in perpendicular position, revoluble hammers carried by the frame, a bit holder revolubly mounted on the frame, means for operating said hammers, and operative connections between said hammers and bit holder.

2. In a drill of the class described, a support having a circular opening therethrough, a collar secured revolubly over said opening, and having a laterally extending portion carrying a ball and socket joint, and adapted for connection with a source of power for oscillation of the collar, a bit holder engaged revolubly and detachably in said collar, said holder comprising opposite hinged sections having angular notches in their adjacentportions forming a passage adapted to hold a bit slidably therein against relative rotation, said head having peripheral ratchet teeth therein and a peripheral groove adjacent to the teeth, and having also a spaced top member adapted to secure the opposite sections in coengaged position, a finger carried by the collar and disposed slidably in said groove, to retain said head against disengagement from the collar, and a spring pressed dog carried by the collar and adapted for engagement with said ratchet teeth, for rotation of the head upon oscillation of the collar.

In testimony whereof I affix my signature, in presence of two witnesses.

NELs A. NELSON, OLIVER HALL.

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