US115092A - Improvement in sawing machines - Google Patents

Description

HENRY- P. OHM.

Improvement in Sawing-Machines. N0. 115,092. Patented May 23,1871.

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HENRY P. OHM, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN SAWINGMACHINES.

Specification forming part of Letters Patent No. 115,092, dated May 23, 1871.

To all whom it may concern:

vBe it known that I, HENRY P. OHM, of Baltimore, in the county of Baltimore and State of Maryland, have invented a new and useful Improvement in Sawing-Machines and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing making a part of this specification, in which Figure 1 is a topview, and Fig. 2 is a side elevation.

This invention relates to a portable sawingmachine for the use of farmers, mechanics, and all persons to whom the sawing of wood in any way is an object; the invention consisting principally in the mechanism whereby the feeding of the carriage that supports the wood to be sawn is effected from the same shaft that operates the saw.

Referring to the drawing, a a are two parallel bars, which are connected by cross-bars and form the supporting-frame of the machine, said bars being provided with legs b and with handles 0 at their rear ends, and being connected at their front ends by an axle, d, which bears a wheel, 6, that forms, with the supporting-frame, a wheel-barrow, on which the rest of the apparatus can be transported from place to place. On four standards, f, which rise two from each bar a, is supported a grooved frame, g, in which plays the carriage It. As shaft 2', mounted crosswise of the bars a, bears a fly-wheel, j, and a spur-gear, 7c, the latter engages with a pinion, l, on a shaft, m. A crankon the shaft m is connected by a pitman, a, with the lower end of the reciprocating saw-frame 0. Arm 1), extending-horizontally from the upper cross-piece of the sawframe, is connected by a rod, q, with the upper end of an arm, 1, that projects upward from a rock-shaft, s, which is supported in .oted-at different heights.

standards t t that spring from the frame g. An arm, a, extending downward from the rock-shaft s, has pivoted to it one end of a pawl, o, that passes through a slotted stand ard, to, that rises from one side of the frame g. The pawl 21 engages with a rack, 20, attached to one side of the carriage h. The rock-shaft s is vibrated by the saw-frame, and by its vibrations it operates the pawl 12, and thus causes the carriage to feed forward. The carriage is slid back by hand after raising the pawl. A lever, 20, is passed through a slotted standard, a, that rises from one side of the carriage, said standard having a series of holes to the end that the lever may be piv- The lever has teeth near its front end to hold the piece of wood, and it is clamped on the wood by a block, as, placed between the rear end of the lever and the carriage g. The block as is provided with shoulders of diiferent heights, which adapt it to the clamping of pieces of Wood of varying SIZES- The machine is intended to be driven by hand-power applied to the crank 1.

The saw 9 has a cutting-edge inclined backward from top to bottom. The saw will not work when its cutting-edge is either vertical or too much inclined. It order to work to the best advantage the cutting-edge must be just enough inclined, as shown in the drawing.

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

The combination of the reciprocating sawframe, rock-shaft s, connecting-rod q, pawl e, and carriage h, carrying the standard at, lever w, and block 00, as specified. 4

II. P. OHM.

Witnesses SoLoN G. KEMoN, CHAS. A. Pnr'rrr.

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