US1388872A - Pick - Google Patents

Description

L. 0. McELHANEY.

`PlCK.

APPLICATION F ILED JUNE 4, 1920.

1,388,872. Patented Aug. 30, 1921.

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g UNITED srArEs PATENT OFFICE.

LEWIS O. MCELHANEY, OF GLASFOED, ILLINOIS.

PICK.

A lication filed .Tune 4, 1920. Serial No. 386594;

To aZZ whom it may concem:

Be it known that I, LEWIS O. MCELHANEY, a citizen of the United States, residing at Glasford, in thecounty of Peoria and State of Illinois, have invented certain new and useful Improvements in Picks; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertans to make and use the Same.

This invention relates to that type of tool known as a pick, being' directed more particularly to a miner s pick. i

The object of the invention is to furnish a construction in a pick wherein the pick 'ends or points maybe removed from the body of the tool for the purpose ofbeing re-shaped. e

Another object of the invention is the provsion of a Construction in a pick wherein the points are made removable but secured firmly in place against any chance offallin out. i

icks as usually employed comprise a solid head of which the two points are integral parts, requiring that the whole tool be transported to the designated place of repairs for re-shaping. Often the workman 'is compelled to carry a heavy load of these tools at intervals, besides which the pick is out of commission until repared.

It is my purpose toprovide a pick construction, therefore, that will admit of removing the dulled points and replacing y them with others so that the work of mining may proceed without nterruptionand without requiring an excessive number of the tools, merely having on hand a plentitul supply of the points which may be readily carried in considerable numbers if need be, because they are small and light, which may be changed as often as desired. Furthermo-e, because of the small size or bulk of the individual points theymay be more readily and quickly shaped for further use.

In the appended drawing- Figure 1 is a side elevation of a complete pick involving my invention.

Fig. 2 is a longitudinal section of a part of the same shown on a little larger scale.

Fig. 3 is similar to Fig. 2 showing a slightly different position ofsome of the parts. i

Fig. 4 is an end the pick.

Fig. 5 shows one of the points in perspectve, and

Fig. (ishows a looking-bar for the points; The body or head of the pick is denoted by elevation of thebody of l, while 2 is the handle thereof Secured there in in any suitable or customary manner.

The said head or body isfurnished with a bore 3 extending longitudinally therethrough which in the present i instance is square in form, Fig. t, the extremities of the head having a square taper l communi cating with said bore 3.

In Fig. 5 is shown one of the points, one of which is adapted to seat in each end of the head. i

Sad point includes a comparatively' long tapered working end`5 shouldered at G'and having a shank 7 tapered in an opposite direction from said tapered end, such shank 7 adapted to seat snugly in the tapered socket 4: described. The shank 7 terminates in a square portion 8 filling the bore 3, having a book-portion 9. 4

10 is a' looking-bar having a hooked end ll to engage the hook-portion 9, as clearly shown in Fig. 2.

Preferably the looking-bar is so placed that its hooks, but one of which is shown, Fig. 2, face in the'direction of the handle 2, the back of the bar being engaged by a set screw 12 in the' outer side of the head.

13 is a recess in the side of the head nearest the handle in which is stationed a spring 14 placed under compression by the bar as the set screw 12 is tightened down upon that member, the bore 3 being larger in extent.

Specification of Letters TEatent. i Patented Aug. 30, 1921. i

than the bar so that the latter may rise and fall therein to permit looking and unlocking of the pick points. When the screw is loosened the spring will raise the bar to release the hook 9 while a reverse action Will positively hold the point in place.

Since the tapered shank 7 of the pick-point fits the tapered socket 4 and the shoulder 6 may bear upon the end of the head l there is a solid, firm hearing for said point with no looseness whatever and yet easy removal of the point is assured.

Changes may be made in the device With-` out sacrificing the spirit and intent of .the invention.

I claim z l. A pick including a one-piece head having a longitudinal bore terminating at one end of the head in an outwai'dly flared angula' recess, a pick-point having a tapered shank corresponding to and adapted to fit into the recess, said shank including a hook to extend into the said bore inward from the recess, said hook lying nearest one of the Walls of the bore, a looking bar lying in and having' a diameter less than that of the said bore and having a hook to lie opposite and engage the said hook of the shank,` means at one side of the bar to positively move its hook into engagement With the shank-hook, and a device placed under tension by the bar in the movement thereof to engage the hook, the same adapted to separate the two said hooks When said means is actuated to 'elease the bar.

2. A pick including a one-piece head having a longitudinal bore terminating at each end of the head in an outwardly fiared recess, a pick-point having a tapered shank corresponding to and adapted to fit into each recess, the shanks each including a hook to extend into said bore inWard from each recess, the same lying nearest one of the Walls of the bore, a looking-bar lying in the bore having a diameter less than that of the bore and having a hook at each end to engage the hook of each pick-point, means to move the hai' laterally to engage the hooks, and a device placed under tension in such movement adapted when said means is 'etracted to move the bar and disengage the hooks.

3. A pick including a one-piece head having a longitudinal bore terminating at each end of the head in an outwardly flai'ed i'e cess a pick-point having a tapered shank corresponding to and adapted to fit into each recess, the shanks each including a hook to extend into said bore inward from each recess, the same lying nea'est one of the Walls of the bore, a looking-har lying in the bore having a diameter less than that of the bore and having a hook at each end each to cngage one of the hooks of the pick-point, means to move the bar laterally to engage the hooks, a spring' at the opgoste side of the looking-bar adapted to be comp'essed hen said means is moved to engage said hools and adapted When the means is i-etracted to move the bar for disengaging the hooks.

- 4. A pick including a head having a longitudinal bore terminating at the end of the head in an outivardly fiared i'ecess, a pickpoint having a shank corresponding inform to. and adapted to seat in the recess, said shank including a straight extension fitting the bore terminating in a hook lying neai'est one of the'walls of the bore leaving a space between it and the other wall of said bore, a looking-har in said bore less in diameter in one oi its measurements than the bore and having a hook to lie permanently in the said space, means to move the locking-bar laterally to cai'ry its hook into engagement With the hook of the shank, and a spring in the path of the said looking-bar compressed by the latter in its movement, said spring' adapted to disengage the har from the hook of the shank when the said means is retracted.

in testimony Whereof I affix my signature in presence of tive witnesses. i

LEWVIS O. MCELHANEY.

lVitnesses a CHAS. A. DUFFIELD A, L, MAPLE,

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