US1111277A - Detachable-point pick. - Google Patents

Description

P. P. TRAINOR. DETACHABLE POINT PICK.

APPLICATION FILED JAN.22.1913.

Patented Sept. 22, 1914.

SHINCTON U TED STATE s PATENT OFFICE.

" rmivx r. union, or umoN'rowN, rENNsYLvANIA.

1 Specification of Letters Patent.

' nErAonABLE-ro-m'r rrox.

Patented Sept. 22, 1914..

ima s; filed may 22, 1913. Serial No. 743,446.

To all whom it may concern:

Be it known that I, FRANK P. TRAINOR, citizen of the United States, residing at Uniontown, in the county of Fayette and State of Pennsylvania, have invented certain new ,and.useful Improvements in Detachable-Point Picks, of whichthe following is aspecification. j

invention relates to picks, and pary ticularly to picks provided with detachable points.

1 The primary object of my invention is the points are provision of a very simple, readily repaired and readily: assembled pick, particularly adapted for min'ers use, in which the pick detachable from the head of the pick, and in whichthe handle. of thepick is held the pick and with the pick points but permitted to be readilyremoved from the head of the pick when desired.

i A further object .of the invention isto so connect the pick points to thehead of the pick'that they will be held firmly in place to withstand the shocks to which the pick points are subjected. l A still furtherobject is to so connect the pick points to the handle and to the head that the handlewill not becomeloose within the head Of'the pick but will be clamped firmly in engagement therewith attall times.

Other objects will appear in the course of the. following description. For a full understanding of the invention,

reference is to be had to theifollowing description. and accompanying drawing, in which: 1 i

r Figure 1 isaperspective view of a pick constructed in accordance with my invention; Fig. 21s a longitudlnal section of my improved pickhead with detachable points Fig. 3 is an under sideplan view of the'head, the points being removed; Fig. 4: is a section on the lined- 1 of Fig.2; Fig.5 is aperspective detail view of the wrench'whereby the collar may be removed; Fig. 6 is-a perspective detail view of the :liner which is disposed bet-ween each tang and the handle.

- Gorrespondingand like parts are referred to inthe following description and indicated in all the views of the drawing'by the same reference characters. I It In the drawings, 2 designates the head of, the pick. Thishead is preferably cast and is provided with the two: laterally-project- -.ing' oppositely disposed portions 3. The

firmly in engagement with the head of head of the pick is formed with an eye 4:, oval in shape,an'd into which the large end of the handle is received, and is also formed with opposed downwardly extending handle engaging spaced socket members 5. The interior faces-of these socket members are slightly concave to engage with the rounded faces of the handle, while the outer faces of these downwardly projecting socket members are screw-threaded, as at 6, to engage with an interiorly screw-threaded clamping collar or nut designated 7 The under faces of the arms or extensions 3 of the head are longitudinally grooved or cut-away as at 8. Theirside walls 9 of this groove are under-cut or downwardly and inwardly beveled as at 9 so that the groove is dovetailed in shape. Projecting from the ends of the arms 3 ,and formed integral therewith, and therefore integral with the head, 'are the tenons 10 which are preferably rounded or circular in section, the lower faces of these tenons being co-incident with the inner. faces of therecessed portions 8 of the head: The head is preferably cutaway at opposite points, as at 11, leaving openings which extend through thewalls of theheadf There are two pick points, one for each end of the head, both of. these pickpoints' being alike. Each point is tapered from its basal end to its apex, and each point is preferably square in section; The Points are designated 12. The base of eachpoint is formed with a mortise 13, to receive the tenon 9, and from the base at the under side thereof projects a tang or extension 14 which has beveled side edges 15 adapted to engage with the beveledside walls 10;of the recess 8. The tangis then narrowed and curved downward, as at 16, so as to conform to the curvature'1of thehead of the pick handle,

and then extended vertically downward, as at 17 this vertical portion of the tang being laterally curved to conform to the curvature of the handle. The curved portion 16 and the straight portion 17 of the tang 1 1 are formed with inwardly projecting pointed studs 'or prongs 18 adapted to engage with the wood of the handle. These studs are preferably screwed into the tang 14, but I do not wish to be limited to this particular ,manner. of mounting the studs upon the tang. I

It will be noted that the curved portion 16 and the straight portlon 17 of each tang Y hammer and shank of the handle, so that the 14 is adapted to fit between the of the walls of said socket members. outer face of each tang screw-threaded, as at 19,.to

nut or collar 7.

a The handle 20 has any ordinary or usual} form and is approximately oval in cross sec-f tion, and at its upper end is formed withani enlarged head 2-1 which :fits within :the eye, of the tangs 1,4; of each:

4:. The portions 16 pick point corresponds in curvature to the curvature of the opposite edges of this head 21, and when the pickpoints are in place the studs or prongs the handle. handle is bored at proper points to recelve these prongs or studs.

It is to be particularly noted that as the collar oronut 7 is screwed home, it will force the curved tangs of the pick pointsfirmly against the curved edges of the head 21 and force the prongs or studs 18 into firm en-- gagement with the wood of the head, and furthermore,that the nut or collar as it is screwed home will cause the portions 16 and 17 of the tang 14: to clamp firmly against the handle will be held rigidly in position against anymovement, thus preventing any loosening of the head upon the handle. Furthermore, the tightening of the collar or nut 19 upon the head will draw the pick points into snug engagement with thetenons 13 and cause the base of the-pick points to abutfirm'ly against the ends of the arms or extensions 3 of thehead, so that when the nut 7 is fully tightened up the-pick points will be nearly as rigid with the head as if they were'cast in one piece therewith. It is to be further noted that the strain on the -pick points incident to use'is resisted not only by the tenon 13 fitting into the mortise in the pick points but by the tang 14: which bears against the under face oft-he head of the pick and that portion of the 50 tang which extends down along'the handle 20. And furthermore, this-wrenching strain upon the pick point caused by the impact of the point against a solid body is resisted by the co-acting clove-tailed faces of the tang 14 and the side Walls -9 of the arms 3. This dove-tailed engagement bet-ween the tang 14 and the portions 3 of the head also prevents any downwardmovement of the pick point relative to the head. f For thepurpose of assembling and disas- I provide an ordinary form of wrench, illustrated in Fig. 5, comprising a shank 22 having a semi-circular curved portion- 23 at one 'end, this curved portion "being provided with an inwardly downwardly extending laterally disposed socket membersv 5 so as to form, when in place, a continuation The 16 is exteriorly. correspond with the exteriorly screw-threaded portion 6 of the socket members 5 and to engage with the opening 25 in.the,nut,or collar.

der to disassemble the removed. In

18 project into the wood of. Preferably the wood of the "in actual use.

engage in an In order to provide an implement which may be used not only for removing and replacing the nut 7, but also for forming recesses in the head 21 ;of;the handle for the reception of the studs 18,1 preferably provide the shank 22. with a gimlet end'26.

The operation of'my invention will be obvious from what has gone before. In orpick, it is only necessary to remove the nut :or collar 7 and withdraw the points from engagement with the handle, after which the handle may be also assembling the members, the handle is first inserted in :the head and the points are then slid' into place and the nut 7 is engaged to draw the parts into operati've position.

My invention is simple, may be readily manufactured, and is thoroughly effective The chief objection topicks heretofore v:used for the same purpose as mine is designed for has been that the points were- J too readily disengaged from the head, and that the points shortly 'become :loose so that a ful'l-strong'stroke could not bestruck. This is not thecase with my pick. The poinfts are held in so lidengagement'w ith the head and 1 cannot become detached while "in use. Furthermore, the handle is also held in rigid engagement with the head and the inconvenience incident to a loosened handleis enprojecting stud 24 adapted to tirely obviated.

In Fig. 6, I have shown'a liner designated 27 consisting of a strip-of metal curved to conform :to the curvature of the side edge of the pick handle and disposed between the end of the .tang and the handle. This *liner'. is perforated for the passage of the ,ccrrespending stud 18. p

Having thus described my invention, what I claim as new and desire to secure by Lettors Patent isz- Y, 1. A pick comprising ahead having gop- 11o positely'disposed .ears constituting a handle 1 soQket and oppositely projecting arms each longitudinally recessed on its under face, pick points abutting against the ends of the -aI'I11S, 't he adjacent faces of thepoi'n'ts and of the arms having onejatenon and the; other a mortise for receiving said tenon and each pick point having a tang or extension engaging in said recess, said tang being down- T41 wardly extended, and means-engaging the downward extensions of the tangsandsaid ears. I r I 2. A pick comprising ahead having oppositely disposed ears constituting a handle socket, the exterior faces of said earsbeing screw-threaded, said head having oppositely disposed arms, each longitudinally recessed on its under face, the side walls offeachre cess being under-cut, and each arm formed with a tenon' at itsend, pick points'abut'ti'ng v socket, each downwardly turned portion of a the tang being exteriorly screw-threaded,

and a nut engageablewith the screw-threads of the tang and the ears.

3. A pick comprising a head having oppositely projecting arms, pick points abutting against the ends of the arms, the adj acent end faces of each pick point and the corresponding arm being formed one with a tenon andthe other with a mortise receiving the tenon and each pick point having an extension or tang provided with a plurality of studs or prongs, a handle with which said studs or prongs engage, and means engaging the tangs of the pick points and holding the tangs in engagement with the handle and 7 pick points abutting against the head.

' 4. A pick comprising a head having oppositely disposed segmental ears surrounding an eye and being exteriorly screwthreaded, the ears being spaced from each other, said head being formed with oppositely rojecting arms each longitudinally recessed on its under face, the walls of each recess being under-cut, pick points abutting against the ends ofsaid arms, the abutting ends of the arms and points, one having a tenon and the other a mortise to receive the tenon and each pick' point having a-tang provided for a portion of its length, with beveled side edges engaging the under-cut walls of the corresponding recess, the end of the tang being downwardly bent to lie between the said ears and being exteriorly I screw-threaded, said end being provided on its inner face with inwardly projecting studs to engage the handle, a handle having its head disposed within the eye of the pick head and embraced by said ears and said tangs, and an interiorly screw-threaded nut engaging the ears of the tangs.

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

' FRANK P. TRAINOR. [1. s.] Witnesses:

LUTHER MOMILLEN, Lon. MORLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Intent-1,

Washington, .D. 0.

Images