US397383A

US397383A - Post-hole machine

Info

Publication number: US397383A
Authority: US
Publication date: 1889-02-05
Anticipated expiration: 1906-02-05

Description

(No Model.)

W. W. & G. F. NIVISON.

V POST HOLE MACHINE. No. 397,383. Patented Fe`b.-5, 1889.v

N PEYERS. hnlo-Lnhognpher, wanhngton, D. c.

IIBD STATES IVILLIAM lV. NIVISON ANI) GEORGE F. NIVISON, OF I/ESIER, MICHIGAN.

POSTHHOLE lVlAClllN.

SPECIFICATION forming part of Letters Patent No. 397,383, dated February 5, 1889.

Y d .Application filed September 3, l 88S. Serial No. 284,443. (No model.)

Be it known that we, lVILLIAM ll". NilvlsoN and GEORGE 11. NIvil'sON, citizens olithe United States, residing at Lester, in t-he county ol Branch and State ot' Michigan, .have :invented certain new and useful Improvements in Iost-llole llilachincs; and wedo declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to improvements in post-hole diggers; and it consists, essentially, of two bars of angular form pivotally connected together by means of a long` plate, or two plates secured parallel tothe said bars and on opposite sides thereof, so that one et" the bars may move with :respect to the plates, while the other one moves therewith, a loop secured to one ot' the hars above angular points thereon, auger-pods secured to the lower ends oll the bars or levers, a pivoted gravitating latch having a notch, and a stud on one ol the levers to engage the said notch, as will be hereinafter set lorth, and particularly pointed out in the elainl ap pended.

Before describing the details et' const ruction we desire to say that we are well aware that it is not new to provide a pest-hole digger composed of two angular levers pivoted together and each carrying a stop, and to employ a pivoted gravitating latch for loelc ing the levers in an operative position.

lVe are also aware o'l the patent graiited to J. J. Armstrong, November 21,1982, in which a post-hole digger shown as composed of two bent bars preferably 'formed Yfrom wood, and provided with spade-blades, so that they may be used separately as spades, or in coinbination as a post-hole digger; but in such device the levers are conneetwl together by blades which `inoieetsullieienlly from the lei vers to forni cutters.

In the accompanying drawings, Figure 'l is a side elevation ot' a post-hole-boring machine constructed according to our invention. Fig. 2 a longitudinal sectional view olf the saine, and Fig. 3 is a transverse sectional view taken on the line of Fig. l.

Referringl by letter to the said drawings,

A B ind ical e two levers, which are et a l'orni substantially as shown, having their upper ends bent laterally to `forni handles a, from which point to the point o they are approxi mately straight, and from the latter point `for the portion ol' their length are bent at an obtuse angle laterally.

(l iiulicates a broad llat loop, which has its ends secured to the lever B, and recen es through it the leve A, so that the saine may move treel y therein.

I) I) indicate two elongated plates, which are ot a rectangular forni. These plates are pivoted at their upper corners to the levers A A and B, respectively, as shown at d, and the lever B is secured tothe lower contiguous corners of the said plate, as shown at e.

It should be here observed that the levers are not directly pivoted together, but that the plates D connect them. It should also be observed that these plates are very long, and that they extend down the sides ol' the levers connecting' them, and` will 1n'event any torsional strain durin operation. VlVe attach iniportanee to the employment of these plates and to the fact that the levers are not pivoted together.

E indicates the pods or blades, which may be ot' any suitable construction, and are se cured to the lower outwardly-eurved ends ot' the levers A B.

l' indicates a gravitating latch, which pivoted to the lever A, adjacent to the handles, and provided with a notch near its opposite end, as shown, to engage a stud, f, on the lever B. It will be seen that this latch by its gravity will normally bear against the said stud F and lock therewith, when, by siniply lifting its outer or weighted end, the same will be disengaged from the said stud and the levers and pods tree to move.

Having lcscribe'd our invention, what we claim is-- The limproved post-lade digger herein described, consisting, essentially, ot' the two angular levers A B, having their upper ends bent laterally to l'orin handles, and their lower ends curved outwardly and inwardly to receive pods, the loop (l, secured to one of the levers and receiving through it the other lever, the long plates D, pivoted at their upper cor- IOO ners to the respective levers, and also pivoted In testimony whereof We affix our signatures at their lower Corners to the lever l5 only, in presence of two witnesses. whereby stability will be rendered in the op- VILLIA'A'I XV. NIVISON. eration, the pivoted gl'z'witatillg lever F, l1zw- GEORGE F. NIVISON.

5 ing a notch, as shown, and the Stud on the 'tnesses:

lever B, adapted lo receive the said notch, T. J N IXON,

Substantially as Speoied. M. O. NWISON.