US48080A

US48080A - Improved mining-pick

Info

Publication number: US48080A
Authority: US
Publication date: 1865-06-06
Anticipated expiration: 1882-06-06

Description

UNITED STATES PATENT GFFICn.

` HARVEY L. LOWMAN, OF VIRGINIA CITY, NEVADA.

IMPROVED MINING-PICK.

Specification forming part of Letters Patent No. 48,080, dated June 6, 1865.

` To tZZ whom, it 11i/ttt! concern:

, 2 is a transverse central section across the eye of the pick.

. The same letters refer to like parts in the different figures; and to enable one skilled in the branch of industryappertaining to my invention to construct and use the same, I will proceed to describe it.

The objects of my improvement do not distinguish it from other inventions ofthe same class which have preceded it. These are strength and stability. The first is due to the proportion of the parts, and the second to the method of attachment ot the helve or handle. It is practically useless to endeavor to attain one without the other, for both are necessary to a satisfactory result, and I shall therefore consider myself justilied in treating the two features as combined to produce as near a perv feet result as the nature of the case will permit.

I shall state both of the features above alluded to, and While treating of them separately I explicitly state that my claim is and will be based upon their combination in one tool as a new article of manufacture, the tool thus 'constructed being better, stronger, and more stable than any other.

I make the eye ofthe pick of elliptical form of an even size during its whole length, and the latter is increased, as shown in the draw' ings, making a raised eye, which, in addition to prolonging the grasp upon the helve, has two other effects, each in itself desirablenamely, rst, increasing` the weight of metal at the middle of the tool; and, second, forming an elongation transversely to the general trending line. of the pick, so as to receive the junction of each bit or end of the pick by A pated or provoked, as is the case in the squareshouldered bit, which distinctly vibra-tes upon the line of j unction with the central boss. The

end of the helve is not split, wedged, `or other- X wise spread, but is intended to'tit and fill the hole per se, as does the whole length ofthe portion embraced by the eye. In this connection it can be readily withdrawn by a direct blow, suitably applied upon the helve, but with` stands in a surprising and highly satisfactory manner the jar incident to the blow received transversely to the axis of the helve.

Having thus described my invention, what I claim therein as new, and desire to secure by Letters Patent, is-

As a new article of manufacture, the pick constructed as herein described-that is to say, with an elliptical socket-the opposite sides of which are parallel to each other-and elongated Vin the line of its axis, in combination with bits merging by curved lines into the central socketed head, as described and represented.

H. L. LOWMAN.

Witnesses:

C. D. SMITH, OcrAvIUs KNIGHT.