US859811A - Pick. - Google Patents

Description

' PATENTED ULY 9, 1907 J. w. HARRINGTON.

PICK

APPLIOATION FILED APB.- a, 1905.

James/K1291 un- 11 E19 s'r Es-PATENr OFFIC V JAMES w. HARRINGTOlI. or BOSTON, MASSACHUSETTS, Assrenon or ONE-HALF TO Al BERT H.-HARRINGTON, OF BOSTON,- MASSACHUSETTS. j I

Specification of Letters Patent.

Patented July 9, 19oz Application filed April 3, 1905. Serial No. 253,481.

- To all :whom it may concern."- I

Be it,known that I, J AMES W. HARRINGTON, a.subject of Great Britain, residing at Boston, in the county of Suffolk and :State of Massachusetts, have invented new and useful Improvements in Picks, of which the followingisaspecification, i v r The invention relates to an improvement in picks, and particularly to a construction wherebythe point or operativeend of the pick is removable from the pick body for sharpening. or renewal.

The main object or the invention is the production of a pick head having one member arranged for use as a hammer, the other member being suitably i ormcd to receive and removably hold a pick point.

The invention will be described in detail in the'following specification, reference being had to the accompanying drawing, in which,

Figure 1 is a plan view of a pick'head'constructed in accordance with my inventionf :Fig. 2 is-a s ide eler vation of the same. Fig. 3 is apers'pective view of the .pick point removed. v

Referring to the drawing, wherein like reference numerals indicate-like parts throughout the several: views, my improved pick comprises a head 1 having 5 the usual eye 2-for the reception ofthe handle, and

arms or members 3 and 4 projecting from said eye memher in about the form of the usual pick head.

The member 3 terminates a short distance-from the eye -2 and has a squared'end5 .to serve as a hammer, for

use in stone breaking or other desired purposes. The

member 4 of the pickhead is cutaway-longitudinally to provide a reduced portion '6 having an end shoulder 7-, and a longitudinal projection 8,-projecting beyond the shoulder 7. .The free' end'of the projection 8 is formed with a lug 9, coextensive in width with the width of the projoction, but of less height than the height of the-projection, the lugbeing preferably arranged about centrally oi the end of the projection 8.

10 represents the point, having the usual sharpened end 11; The opposite endof the point is reduced at 12 to provide a shoulder 13 and a projection 14, the

projection being l'ormed at its free end with a lug' 15 similar in size and shape to the lug 9 previously described. in assembling the parts the projection 14 of the point rests within the cut-away-portion 6 of tlic' bead member 4, the lug 150i the projection 14 seating in a recess 16 formed in thcwall of shoulder 7; and the projection S of tlu mcinbcrd seats in the reduced portion 12 of the pick point, withthe lug' 9 fitting arccoss 5O 17 formed in the wall of the shoulder 13. A bolt 18 passing transversely through the projections 8 and 14,

secure the parts against accidental disconnection.

thickness to the respective projections 8 and 14, but 'of the pick is-borne by the free ends of the projectionsfl .point, and dispenses with the usualadditional pick of two witnesses.

The pick point maybe readily disconnected from the pick head when desired for sharpening, .or when the pick isdesigned for other uses which require a peculiarly shaped point, it. being understood that I contemplate the construction of :points-of various formation and arranged at their rear ends for cooperative engagement with the end of member 4: of the pick head. The lugs 9 and 15 when seated within their respective recesses 17 and 16 operate to prevent any lateral strain on the pick point from breaking the connection between said point and the pick head. I I I It will be noted that-the lu'gs 9 and 15 are equal in less height than the similar dimension of said projctions, whereby the lugs provide squared extensions projecting centrally from the ends of the parts'8 and 14.

By this construction the, strain incident to the use of and 14, and the locking lugs 9 and 15 are thereby w effectively protected against liability of breaking when thepickisinuse. Q i v The structure provided is especially adapted for a mining pick,a s it provides for the renewal of the pick point of ordinary picks, which extra point has been iound very awkward in use in the confined spaces in which miners usually work. Furthermore, another advantage'due to my structure is that I am enabled to put practically all of the weigh-t of the pick head in one end, whereby the joint may be made verystrong.

Having thus described the inventionwhat is claimed as new, is:

A pick comprising a head wlth' an eye therein, art arm projecting laterally beyond one end 4 'the eye, having a .vertlcal squared faced, termlna-Lto prvlde a hammerhead, an extended arm onthe other endf f the eye having :1- right angular flat slded cut-away -prtlou to provide a vertical shoulder having a central squared recess there1n, 90.

a squared lug on the free end of the extension, a pick point having a right angular cut-away portion constructed to conform to the configuration-of the-cut-awuy portion of the extension-and having a similar shoulder with a squared recess therein to inclose the lug on the freefend of the extension; a central squalreddug' on theinner vertical face of the pick point servlng. tp be lnclosed within the squared recessof theextenslon, openings extending entirely .tln-ough the cut-away vertical race portions 011 the-extension and theplck point, shelf: for engaglng saldopenlngs and a nut on said bolt, substantially as specified. In testimony whereof, I am: my slgnature ln'presence Ibis JAMES W. X HARRINGTON. n'iark Witnesses I Purina A. Fnnnmuckson, Enwann (.oNNnLL.

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