US66267A - Buffs tkowbbidge - Google Patents

Description

R. TROWBRIDGE.

Shovel Plow.

Patented July 2, 1867.

lnventon @[aitzh tetra igatmtt @ffine RUFUS TROWB'RIDGE, OF WATERLOO, IOWA.

I Letters Patent No. 66,267, dated July 2, 1867.

SHOVBL-ILOUGH.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, RUFUS TROWBRIDGE, of Waterloo, in the county of Blackliawk, in the State of Iowa, have invented a new and useful Improvement on a Shovel-Plough; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings. v

I construct my shovel-plough in any of the known forms, and attach thereto as many shovels as desired. I make my shovel for double-shovel ploughs about eleven inches long, seven inches wide at the top, and six and three-quarter inches wide at a point about two-thirds of the distance from the top downward, at which latter point I make each edge of a gentle and uniform curve until these curves meet at the lower extremity forming the point of the shovel. This point I curve slightly forward in the form of many shovels now in use. I make my shovel. of two plates, the face of cast-steel three-eighths of an inch thick in the main. I weld-to this on the back side an iron plate one-quarter.of an inch thick, and make vboth to come to a sharp edge about one-third of the distance from the lower end upward. I then make'agroove in the face three-eighths of an inch deep, and extending about two-thirds of the length of the shovel from the top, and within about one-fourth of an inch on each side, leaving the steel on three sides of the groove projecting three-eighths of aninch above the iron plate. These steel projections I groove under a little from the inside. I next make two holes in the iron plate for bolting the shovel to the standard, andcountersink these holes in the common manner to receive the heads of bolts on a plane surface with the plate, and fit these bolts in their places. I then fit a plate of glass three-eighths of an inch thick into the grooves spoken of, leaving it on a plane surface with the steel plate. I make my standard in the ordinary manner, except at the upper extremity of the shovel I make it to project out so as to be on a plane surface with the face of a shovel, which projection serves to keep the glass plate in its place. The glass and the form of the standard have a great tendency to prevent the dirt from adhering to the shovel, and the glass prevent the wear to a great extent.

What I claim as my invention, and desire to secure by Letters Patent, isr The combination of a flat-glass plate to the face of the share of shovel-ploughs, substantially as specified.

RUFUS TROWBRIDGE. Witnesses:

W. N. SMITH, H. B. ALLEN;

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