US1357451A - Pick - Google Patents

Description

J. N. GROOVEIL PICK.

APPLICATION FILED MAY 7, 1919.

Pa tented Nov. 2, 1920.

muan'roz UNITED STATES JOHN NORMAN GROOVER, 0F BIRMINGHAM, ALABAMA.

PICK.

Specification of Letters Patent.

Patented Nov. 2, 1920.

Application filed May 7, 1919. Serial No. 295,317.

To aZZ whom it may concern:

Be it known that 1, JOHN N. GRoovER, a citizen of the United States, residing at Birmingham, in the county of Jefferson and State of Alabama, have invented a new and useful Pick, of which the following is a specification.

This invention relates to improvements in tools of the character known as picks, the object of the invention being to provide an improved tool wherein the points can be renewed or differently shaped points substituted for those originally furnished with the tool.

A further object of the invention is to provide a body or head adapted to interchangeably carry a plurality of diiferent implements and in which the use of screws for holding the implement in place is entirely eliminated.

A further object of the invention is the provision of a tool of the character set forth which is comparatively simple in construction, inexpensive to manufacture and very durable in use.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention consists in the novel features of construction and combination of parts which will be more fully described hereinafter and particularly pointed out in the claims.

In the drawings accompanying and forming part of this specification,

Figure l is a side elevation, partly in sec tion, of my improved pick, showing a portion of a handle attached thereto;

Fig. 2 is an end elevation, broken away at its lower end;

Fig. 3 is a cross section taken on the line 3-3 of Fig. 1; and

Fig. 4 is an enlarged detail perspective view of one end of an implement adapted for use in my improved construction.

The same characters of reference designate the same parts in the different figures of the drawings. Y

As is well known, the ordinary pick is used until the points thereof are worn off so short that the tool is of no service, where upon it is'thrown away, since the cost of steel and labor is so high that it is more expensive to buy the steel and hire a blacksmith to re-point the tool than a new one would cost. The object of this invention, therefore, is to provide a pick that is so formed that the working points are detachably secured thereto, so that when a point becomes worn, or it is desired to use a point of different formation, all that is necessary is to remove the discarded point and substitute the one desired.

Referring to the drawings, 2 designates a body or head having the usual opening 3 therein for the reception of the end of a handle 4-, the opening and handle being slightly tapered toward the outer end thereof to prevent separation of the head from the handle when in use. The head 2 shown herein comprises a pair of oppositely extending arms 5, the ends of which are sawed off square. Each of these arms is provided with a longitudinally extending opening 6 communicating at its extreme inner end with a small laterally extending recess 7. V'Fithin the opening 3 at the outer end thereof is formed in each of the arms 5 a recess 8, which communicates through a channel 9 with the opening 6 in the arm.

An implement 10 having any suitable form of point is provided with a stem 11, the size of which immediately adjacent to its point of juncture with the implement is such as to snugly lit the outer end of the opening 6 and tapered down on one side thereof to a smaller size at its end, as clearly shown in Figs. 1 and 4. The end of the implement on which the stem 11 is formed is of approximately the same size as the sawed off ends of the arms 5, whereby the implement is provided with a shoulder 12 surrounding the stem. The stem 11 is provided at its end, on the side opposite the tapered side with a laterally projecting lug 13 adapted to seat within the recess 7 of the arm 5. For securing the stem in the opening 6 with its lug in engagement with the recess 7, I provide a wedge-shaped member 14 adapted to pass through the channel 9 and form a wedge between the tapered side of the stem and one of the side walls of the opening 6, the wedge 14 having a laterally extending head or lug 15 adapted to seat in the recess 8 within the opening 6 of the body.

In assembling the tool, the stem 11 is in serted in the opening 6 by tilting the implement so that the tapered side of the stem rests against the side of the opening oppo-' site the side havingtheyrecess 7, and-the stem slid in until its lug 13 reaches the recess 7, whereupon the implement is tilted in the opposite direction so as to cause said lug-to seat within the recess. The shoulder 12; of the implement is thus firmly seated on the end of the arm 5, whereupon thewe'dge 14 is insertedofrom the end of the handle-opening 81 throughthe communicating channel 9 and pushed'down until its lug 15 is seated within the recess 8 of the head. The handle is then inserted through the opening 3, and owing to thetapered formation-of the opening 3 and ofthe handle the sides of the handle will lie against the ends "of 'the wedges 1a and hold them firmlyseated in the arms, whereby the implement is positively lockedagainst' withdrawal from the opening6.

Fromthe foregoing it-will be seenthat when a jobis to be done'that requires the use of a'n'umber of'implements having differently formed cutting ends, such as picks, mattocks, axes and the like, it is necessary to have only one head, andall of the: implements required having the same formation of stem maybe interchangeably secured in said'head in the manner 'abovedescribed.

It should also be noted'that therecess 8 or slotformed'thereby, communicates with the convex side of'the head, asdistinguished fronrthe inneror concaved side thereof, andthat the outer wall of the longitudinally extendingopening 6 in each arm, e2;- tends in a pla-ne,'to clear the convex face at the outer side and at a point diametrically opposite thereto, at the sleeve orbody portion 2, thus permitting the wedge'keys 14L to'be engaged in position'or disengaged therefrom, longitudinally, to clear the outer face of thehead, thus greatly facilitating the application thereof and the securing of the parts in position.

While I have described in detail the structure herein illustrated, it is to be understood that I do not thereby limit my invention to the precise'features of construction shown, as I am aware that many mechanical changes and modifications may be made therein without departing from-the spirit and scope of the invention as set forth in the claims appended hereto.

Having thus described my invention, what I claim is: V

1. A tool of the class described having a and provided with a communicating slot having an opening extending laterally through the head, a stem adapted to be secured tosaidhead and provided with'a lugprojecting laterally therefrom at its inner 'endto'enter said recess from the opposite side ofthe opening and an elongated wedge key adapted to engage the slot through the opening thereof in a plane clear of the outer end of the head and into the space between theT stem and the wall of-the longitudinal opening to hold the lug in' the recess,said'stem'having an implement formed 'ing therefrom,- the outer face being convex and the inner face concave, each of said arms being provided with a longitudinal opening forming an end wall at thefree end of'each arm and having a recess in one side thereof atits inner. end, said openings each communicating with the outer face of the head throughva slot therein, said recess being disposed oppositethe slot'ofeach opening, an implement for each arm" having a reduced portion forming a shoulder adapted to engage the outer end of each arm and conform thereto, said reduced'portion" being tapered to provide a stem having a lateral projection at -one side *a'daptedto engage said recess and leave a space of' tapei'ed formation betweenitsopposite side and the adj acent wall ofv the opening, and a wedge key engaged through the slot ofeach recess and in said space throughout the length of the arms and-stems'and adapted to be engaged in position longitudinally or disengaged in a plane clear of the convex face of the head.

3. A tool of the classdescr'ibed comprising ahead provided with an opening for the reception of ahandle and having a pair of arms projecting therefrom, each of said arms being provided with a longitudinal opening,athe outer wall of each of which 6Xt611ClS'lIl a plane to clearthe outer face of the head the diametrically opposite side or pointand a'laterally extendmg recess communicating with said opening at itsinner end, the front of the head having 7 a right angularly formed slot communicating with said opening first-named and with thefront surface of the head at the convex side thereof, an implement conformingin cross section to each arm and provided with a tapered stem projecting therefrom forming a shoulder adapted to engage'the ends'of the arms around the longitudinal openings therein, said stems being beveled at one side and having a lug projecting from the opposite side adaptedito enter a lateral recessby angular engagement of the stems in the openings of the arms, and a In testimony that I claim the foregoing wedge shaped member adapted to engage as my own, I have hereto aflixed my signain said longitudinal openings between the ture in the presence of two Witnesses.

stems and opposite Walls in and through JOHN NORMAN GROOVER. said right angularly formed slot whereby Witnesses: 1 a handle disposed in the opening of the T. P. STOVALL,

head will retain the same in position. E. H. NALL.

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