US1266282A - Stone-splitting tool. - Google Patents

Description

v T. LARNEY.

SI ONE SPLITTING TOOL.

APPLICATION 'FILED AUG.23. 19H- Patented May'14,1918.

UNITED %TATE% PATENT QFFIGE,

THOMAS LARNEY, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

STONE-SPLITTING TOOL.

Application filed August 23, 1917.

'1 b all whom it may concern:

Be it known that I, THOMAS Lsnnnr, a citizen of the Dominion of Canada, residing at Vancouver, British Columbia, Dominion of Canada, have invented certain new and useful Improvements in Stone- Splitting Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in stone splitting tools.

One object of the present invent-ion is to provide a novel and eiiicien-t device whereby the stone can be efiectively and evenly split without destroying the uniformity of the splitting line at the outer ends of the holes bored therein.

Another object is to provide a feather for use in connection with the splitting Wedge of such construction that the splitting strain will be brought to hear at a distance down inside of the hole rather than at the mouth of the hole as is the usual result with devices of this character heretofore.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanyii'ig drawing.

In the drawing:

Figure l is an elevation of one of the feathers and the splitting wedge in position Within an opening in a stone, the stone being shown in section.

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1. the wedge being shown in elevation.

Fig. 3 is a perspective view of one of the feathers removed from the stone.

Referring particularly to the accompany ing drawing there is shown a portion of a stone 1 3 in which is formed an opening or recess 12, which is one of a number arranged in a row in the manner usually adopted in splitting stone.

Disposed in the opening are the feathers 10 each of which is formed with a semi- Copies of this patent may be obtained for Specification of Letters Patent.

Patented May 14, 1918. Serial No. 187,839.

cylindrical exterior contour, and has a channel or groove formed longitudinally throughout the entire length of the fiat face thereof. This channel or bore tapers from a point 16, toward both ends of the feather, the longer portion being represented by the character A while the shorter portion is represented by the character B. The point 16 is, in effect, a shoulder, and as these shoulders are disposed in the same plane, when the two feathers are disposed in the recess 12, they form a circular shoulder or rib.

A tapering pin 19 is adapted to be inserted between the feathers and in the larger end of the longer bore thereof. The outer or upper end of the wedge is then struck with a hammer, or other suitable impact tool, whereby the smaller end of the pin is driven downwardly between the shoulders 16, with the result that the stone will be split at a point inwardly of the recess and on a straight line on which the roW of recesses are formed. This will obviate the usual undesirable jagged edges around the mouths of the recesses.

In the feathers now in use, the bore therethrough is tapered constantly from one end to the other, whereby when the wedge pin is driven into the bore between the feathers, the spreading action takes place at the mouth of the recess, with the result that the mouth of the recess is jagged.

l/Vhat is claimed is:

In a stone splitting device, the combination with a tapering wedge member, of a pair of semicylindrical feathers each having a longitudinal channel formed in the flattened face thereof, said channel Widening toward both ends of the feather from an intermediate point near one end of the feather.

In testimony whereof, I atfix my signature in the presence of two Witnesses.

THOMAS LARNEY. Witnesses:

F. J. BAYFIELD, MADELEINE TATTERSALL.

Washington, D. C.

Images