US599717A - James h - Google Patents

Description

w (No Model.)

J.QH.MADDUX.

PICK.

No. 599,717." Patented Mar. 1, 1898.

to be a full, clear, and exact description of similarmaterials and known as picks.

terlocking and holding mechanism.

" exactly upon the halved ends of A..- The line means for locking them securely to the main the stock or body A is made with a central the central portion and have theends formed made of any suitable or desired shape for the Y UNITED STATES" PATENT OFFICE.

JAMES H. MADDUX, OF SAN LUIS OBISPO, CALIFORNIA.

SPECIFICATION forming part of Letters Patent No. 599,717, dated March 1, 1898.

Application filed October 18, 1897- .To all whom it may concern.-

Be it known that I,.JAM-Es H.-MADDUX, a citizen of the United States, residing at San Luis Obispo, county of San Luis Obispo, State of California, have invented an Improvement in Picks; and I hereby declare the following the same.

.My invention relates to that class of implements for working rocks, hard earth, and other The object of my invention is to provide easily detachable and removable points, with portion or stock, so that they cannot become disengaged'or loosened by use, whilebeing easily removable and replaceable when worn out.

Referring to the accompanying drawings, Figure 1 is a view showing the parts united. Fig. 2 shows the parts separated and the in- In the construction of my improved pick eye or means for, securing the handle. The arms extend a short distance to each side of or halved asshown at O. The points D are work to bedone,and the inner ends of the part carrying the points are also halved or cut away, as shown at D, so as to overlap and fit of division between the two halves is vertical'-that is, the plane in which the two halves fit together is from the outer to'the inner face while the abutting shoulders extend transversely across the sides, one side upon one end of the plane and the other upon the opposite side at the other end of the plane. The depth of the implement from the outer to the inner side is such that these shoulders in themselves, being at some distance apart, form a very complete lock and resistance to prevent the two parts being separated by reason of blows or strains, the two parts being held together by means of a bolt or rivet E, passing through a hole which is formed ap proximately central through the meeting faces of the two parts. The bolt may havea head Serial No. 655,641. (No model.)

upon one end and a suitable locking-nut upon the other.

' In order to increase the strength of the lock and to prevent any possibility of the loosening of the parts when strain is brought upon the implement, I have shown projecting ribs or lugs G formed in the face of one of the meeting halves and corresponding depressions H formed in the other half, of such shape and size as to exactly receive the lugs or projections when the two parts are fitted together. Theselugs orprojections may extend transversely, diagonally, or longitudinally, or in any other similar form, or they may be made in the form of parallel teeth or bars adapted to interlock with each other. In the and the corresponding depressions H arranged longitudinally with reference tothe head of the pick, so that when the parts are bolted together these ribsand depressions interlock and when the bolt which holds the parts together has been introduced the strength is greatly increased. I have also still further shownan arrangement of dowelpins I, which project from one of the faces and are adapted to enter holes in the opposite face at points sufficiently distant from the central bolt to greatly increase the interlocking strength and prevent any loosening of the parts from work. With this'construction it will be seen that it is only necessary to remove the bolt, when the parts may be disengaged, and if 'a point is broken or worn out a new one can always be attached in short time. The more expensive central portion of the head having the eye or fastening and the handle are always saved, while the points are the only parts necessary to renew.

It will be understood that these parts may be formed in any usual or suitable manner, such as by drop-forging or other well-known plan, so as to reduce the expense to the minimum.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- As an article of manufacture, a pick having a centraleye or socket and outwardlyprojecting arms with separable points, the

meeting ends of the arms and points being and corresponding holes in the other face, to IO halved together in planes parallel with the receive said pins, substantially as herein dehandle and united by a bolt which passes scribed.

through them in a plane transverse to said In Witness whereof I have hereunto set my handle, longitudinal ribs projecting from one hand.

of the meeting faces of the halved portion and JAMES H. MADDUX. corresponding channels in the other meeting Witnesses:

face, to receive said ribs, and dowel-pins near. S. H. NOURSE,

the outer angles of one of said meeting faces JESSIE O. BRODIE.

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