US903428A - Pick. - Google Patents

Description

G. B. YEANEY.

` PICK. APLIGATION FILED APR,10,1908.

GILLESPIE B. YEANEY, OF GLEARFIELD, PENNSYLVAYI.

PICK.

Specification oi' Letters Patent.

Patented Nov. 10, 1908.

Application filed April l0, 1908.- Serial No. 426,324.

To (LLL whom di may concern Be it known that l, Girnnsrm E. YEANEY, a citizen of the United States. residing at Gleartielth in' the county oi: Clearfield and citate ot' i'gemtsylvania, have invented a new and useful Pick, ot which the following is' a specific-ation.

This inventitm relates to picks designed more especially for Ithe use of miners although applicable to picks of other types, and has ior its object: to provide a tool of this character with removable points which may be easily and quickly changed for pointsI of different shape, or tor sharp points when those in use have become dulled. To thisI end the arms of the pick have their ends socketed for the insertion of cur-ved or tapering shankeI on the removable points each shank provided with a threaded end for a nut seated in a depression formed in the inner Iside of the arm near its end.

With this object in view the invention consists oi) the const rnction and arrangement ot partshereinafter described and claimed and illustratedl in the accompanying drawing,v forming a part ot this specification in whichf- Figure 1 is a side elevation of a.. portion ot a pick partly broken away; F 1g. 2,1m ele 'ation oi. the inner side of one of the pick arms showing the point attached; and Fig. 3 a perspective view ot' the point detached.

Similar reference numerals are used fo the same partsl in all the Iigures.

The numeral 1 indicates the pick head having the usual eye l for the handle 3 and oppositely extending arms 4, one arm only, however. being sho'ywn as the other arm is a mere duplication thereot'. The end 5 of each arm 4 is made t'latl and perpendicularly disposed with relation to the axis of said arm.

llxtcnding inwardly from the end 5 o'i" the arm is a socket. tor the Shank 7 on the inner end ot' a removable point or bit S which may have a pointed, chisel-shaped or other t'orm ot working end 9. The shank 7 is preferably rectangu'lar or other polygonal torni in cross section and wider from within out 'ardly where it joins the point S than at its free end, its tapering shape being produced by curving the outer side 10. rlhe lateral sides of the shank are .substantially parallel from end to end as showny while the inner side 11 is straight t'or about one half its length and slightly concave for the other or upper half to make more easy the insertion and removal of the Shank into and from the Socket. Projecting at a. right angle from the straight portion oit the inner Side oi? the Shank 7 and at the end of Said Shank is a shortstad 12 exteriorly threaded for a nut 13 by means of which the point 8 is made fast to the arm of the piek.

ored or otherwise formed. in the inner side of the pick arm 4 .near its end G is a circular or other shaped depression lat coinmunicating with the bot-tom of the socket 6, into which deln'ession the threaded Stud 12 projects when the pick point 8 is in place. 70 As thus seated, the axis of the threaded stud is coincident with the axis of the depression 11 and perpendicular to the inner side of the arm 14. lt' the nut 13 be now screwed on the stem 12 until it is seated against the 75 hase ot thedepression, the point 8 will be rigidly held in place. The inner side of the pick will present a smooth practically unbroken surface as the nut is preferably made circular. of the same diameter ae the depression and its outer face as well as the end of the stud 12 are iush with the side of the arm. 'l-he outer face of the nut 13 may be slotted as shown or provided with perforations for a screw driver or wrench to rotate the nut.

A piek thus constructed is simple cheap and serviceable .as one pick only need be carried by a workman who7 with a number of points which can be quickly attached to the piek arms when necessary is ready at all times to operate on any class of material that may be encountered.

What is claimed is 1. A pick having a separable point provided with a shank of angular cross Sectionf a curved side and an opposite side partly concave and partly straight with a tl'neaded' projection at'. a right; angle therefrom, said 'shank being adapted to 100 he tted in a. socket of similar shape formed in A the end of one of the arms of said pick and Said threaded shank axially disposed in a depression in the side of said arm comn'ninieating with the socket .105 by an elongated opening, and. a nut for said stud fitting said depression for securing the point on the pick, said outer face of the nut lying flush with the side of the pick arm.

Q. pick having a separable point pro-Q10 videdwith a shank of angular cross section, said shan: having a convexly curved forward side' and an oppositel side partly concave and partlystraight, with a threaded stud projecting from the extreme end thereof at right angles to said straight portion, an

' arm on said pick provided with a socket of a shape similar to said shank 'and having a recess on the rear thereof, extending over the sides and ends o f the socket to form a shoulder and receive said threaded stud, and a nut for said stud tting said recess for securing 1c the point on the` pick.

In testimony that I claim the foregoing as my own, Ivhave hereto aixed my signature in thevpresence of two witnesses.

GILLESPIE B. YEANEY. Witnesses:

A. SoDERLUN, VICTOR SODERLUND.

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