US771827A - Sectional coal-auger nut. - Google Patents

Description

PATENTED OCT. 11, 1904.

J. H. MASON. SEGTIONAL GOAL AUGER NUT.

APPLICATION FILED MAR. 5. 1904.

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BY QWq Qm.

ATTORNEY8 UNTTEE STATES JULIUS H. MASON, OF DUNCAN FALLS, OHIO, ASSIGNOR OF ONE-HALF Patented October 11, 1904.

PATENT ()FFICE; I

TO SPENCER M. GARRETT, OF PHILO, OHIO.

SECTIONAL COA L-AUGER NUT.

SPECIFICATION forming part of Letters Patent N0. 771,827, dated October 11, 1904:.

Application filed March 5, 1904.

To all whmn it may concern:

Be it known that I, J ULIUs H. MAsoN, a citizen of the United States, residing at Duncan Falls, in the county of Muskingum and State of Ohio, have invented a certain new and useful Improvement in Sectional OoahAuger Nuts, of which the following is a specification.

My invention relates to the improvement of open nuts or boxings for coal-angers or augers of that class which are adapted for use in boring into coal or similar minerals.

The objects of my invention are to provide an improved construction of auger-nut of this class wherein means are provided for compensating for thewear on the nut and whereby a strong and durable nut is provided which obviates the employment of separately-formed keys or other loose fastening devices and to produce other improvements the details of construction of which will be more fully pointed out hereinafter.

These objects I accomplish in the manner, illustrated in the accompanying drawings, in Which Figure 1 is a view in elevation of my improved nut, showing a portion of an-auger screw-shank therein. Fig. 2 is a plan view of the nut, showing the same in its locked or closed position. Fig. 3 is a detail sectional view on line at m of Fig. 1. Fig. 4 is a side elevation of the nut with the locking-lever removed. Fig. 5 is a sectional view on line yg of Fig. 2, and Fig. 6 is a similar sectional view showing the position of the locking-lever when the parts are in the unlocked positions.

Similar numerals refer to similar parts throughout the several views.

1 and 2 represent, respectively, the two halfcylindrical opposing internally-threaded sections which form the nut-body, these sections being hinged or jointedly connected through the medium of pivoted or hinged arms 3 and 4:, which project from corresponding sides of said nut-sections. W'th the hinge-arm 4 of the section 2 is formed one of the outwardlyextending nut-supporting trunnions 5, and from theopposite side of the section 2 projects the opposing trunnion 6. As indicated in the drawings, and more clearly in Fig. 4, the

Serial No. 196,656. (No model.)

base or inner end portion of the trunnion 6 is enlarged to form a partially circular external shoulder 7 and adjacent to the latter said trunnion is provided with a desirable number of screw-threads 8.

In producing the nut-section 1 the latter has formed therewith at the center of its length, on what we will term its forward side, an outwardly-projecting lug 9, which, as shown, is in the nature of acam projection and which has one of its side faces formed substantially vertical, as shown. The opposing side face and top of the lug presents a suitablycurved surface, as shown.

11 represents a cam-lever which I employ in the manner hereinafter described in adjustably locking said nut-sections in proper engagement with each other. This lever, which is in the nature of an elongated linkbody, as shown, is formed with an enlarged cam-head portion 11, the center of which is out of longitudinal alinement with the center of the elongated handle portion 11 thereof. The head portion 11 is formed with an opening 12, which is central of said head, although the mouth of said opening or the inner face recess leading to said month, which is indicated at 11", has its wall in the form of a spiral curve, as shown more clearly in Figs. 5 and 6. As indicated in the drawings, the trunnion 0r pin 6 is adapted to have its shoulder portion 7 contained within the spiral-walled recess of the lever-head, said lever being maintained in its position on the trunnion enlargement or shoulder by means of a suitably-formed nut 13, which engages the threads 8 of the inner portion of the trunnion. When thus mounted and the handle portion of the lever is raised to the vertical or substantially vertical position, it is obvious that the member or section 1 of the nut is adapted to be raised or moved outward from the section 2 on its hinge, the cam projection 9 in this operation being free to move outward through the mouth of the recess 11 which leads into the handle portion or yoke 11. It will be observed, however, that when the nut-sections are together and are made to embrace the screw-threaded shank 15 of the boring-auger said nut-sections may be locked in engagement one with the other by turning downward the lever 11, which will result, as will readily be understood, in a gradually-increased binding of the inner spirally-curved wall of the recess 11 and the curved surfaces of the lug 9 and shoulder 7, this binding or frictional locking of the parts serving to insure the clamping of the nut-sections in proper engagement with the threaded auger stem or shank. As the nut or the internal threads of the sections thereof become worn such wear may be compensated for, as will be readily understood, by a further turning of the lever and whereby said nu t-sections are again moved into desirable contact with the threads of the auger-stem.

Heretofore it has been customary to provide various means for locking the sections of an open nut or boxing of the character described in which separately-formed keys and other similar devices have been utilized; but by the construction herein shown and described it will be understood that a comparatively simple locking means is provided which obviates the necessity of employing any loose keys or other disconnected parts and which provides a ready means for adjusting the relative positions of the nut-sections, and thereby compensating for such wear as said sections may be subjected to.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a sectional coal-auger nut, the combination with the hinged nut- sections 1 and 2, one of said sections having opposing trunnions and the other a cam-lug, of a lever rotatably mounted on one of said trunnions and recessed to embrace the base of the trunnion and said cam-lug.

2. In a sectional coal-auger nut, the combination with the hinged nut- sections 1 and 2, said sections having opposing trunnions and the remaining section having a cam-lug projection, of a lever comprising handle and head portions, said head having an opening therethrough adapted to receive one of the trunnions, and having its inner face recessed, the wall of said recess describing a spiral curve.

JULIUS H. MASON.

In presence of FRED BURNS, ANns L. FORAKER.

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