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United States Patent Office.


Specification forming part of Letters Patent No. 692, dated April 
14, 1838.

To all whom it may concern:

Be it known that I, David Lewis, Jr., of the town of Bern, in the 
county of Albany and State of New York, have invented a new and 
Improved Mode of Mowing Grass and Cutting Grain by Animal Power, 
of which the following is a full and accurate description.

My said invention consists in the construction and use of a 
machine of the following form and principle: The frame which 
sustains the machinery is of timber, and is of an oblong form in 
size—say ten by eight feet—and the timbers three inches thick by 
seven inches deep, and is marked in the Drawing No. 1 A A A A. 
This frame is sustained at the forward end by two strong wheels, 
marked B B, which are about four feet six inches (more or less) 
in diameter. Under the center of the hind end is a steering or 
caster wheel, which is marked
C in both drawings, which wheel revolves between two straps of 
iron turning in form of a crank at the upper end, and terminating 
in a strong swivel, which traverses on a screw-bolt, which passes 
up through the frame with a nut on the under side and another on 
the top of the frame, by which the said end of the frame can be 
raised or lowered as occasion may require. On one of the forward 
wheels—say that on the right baud—is a segment spur-wheel on the 
side next the frame, the edge of which is seen in No. 1, marked 
D, which segment-wheel may be about — feet diameter, and the 
fellies of the supporting-wheel on that side are of sufficient 
depth to receive and support it. Immediately behind this wheel is 
another spur-wheel — corresponding gear, and about two feet 
diameter, marked E in Drawing No. 2, which wheel operates a 
pinion on its opposite or back side of about nine inches 
diameter, which pinion is marked F. The pinion last specified is 
on the outer end of the shaft or axle of the cylinder-rake G, 
which is thereby made to revolve with said pinion. On the same 
shaft and on the outer side of said pinion is a bevel-wheel of 
three feet six inches (more or less) in diameter, facing inward 
toward the frame marked H in both drawings. This wheel operates a 
bevel-pinion, (marked L in Drawing No. —,were which pinion is on 
the crank-shaft. J. This crank has a sweep six inches each way, 
and carries with it the outer end of the pitman L, the other end 
of which is attached to the upper traverse-bar M, which operates 
the scythe. The scythe marked O is underneath the traverse-bar, 
at a proper distance from the ground, and is attached to said 
bars by two bars or rods of iron projecting downward, as seen at 
P, No. 2, the bottoms of which bars turn forward at the proper 
angle to receive the ends of the scythe thereon, where it is 
fastened with proper bolts, and the upper ends of said rods pass 
upward through the traverse-bars, and having a nut screwed on the 
top of said bars, another on the bottom, the scythe is by means 
of said nuts raised or lowered as occasion may require. On the 
periphery of the right-hand forward wheel are spikes or corks 
which enter the ground as the machine is drawn forward and 
prevent its slipping, and the segment-wheel attached to it turns 
the center wheel, E, which turns the pinion F, and with it the 
cylinder rake or comb, the teeth of which, passing backward 
through the grass toward the scythe, not only straighten and 
clear it preparatory to its meeting the scythe, but incline it 
backward so that the scythe can take better hold of it The 
bevel-wheel, at the same time turning the bevel-pinion, as 
already specified, carries the scythe; horizontally each way with 
a quick action and reaction, and produces the effect required of 
cutting the grass and leaving it spread behind. The scythe may be 
made in the following form—say seven feet in length, about four 
inches wide, smooth on the upper and lower side, with the back of 
the under side rounded off a little, crowning in front, each end 
turning back, and the edge or the crowning or front to continue 
round each end, with two holes through near each end to receive 
the small bolts that pass through the feet of the bolts that 
proceed down through the traverse-bars, as seen at P, Drawing No. 
2, the hind wheel traversing in the manner already described. 
Like the caster on the foot of a piece of furniture, the machine 
will be at liberty to turn in any direction. The traverse-bars 
are coupled together at the proper distance by any suitable 
contrivance, one resting in a proper score, another on the top of 
the frame at each side, and the other under it, as shown, by the 
ends at R in No. 2. It may have friction-rollers to ease and 
facilitate its motion. When the scythe is to be sharpened, the 
lower traverse-bar is carried back, as shown by the dotted lines 
at Q in Drawing No. 2, the top bar serving as pivot, and when so 
carried back is whetted from the back side, and when carried 
forward again to the place of operation it is kept there by a 
button, pin, or any suitable application.

The points I claim as my invention are—

1. The particular structure of the traverse-bars and manner of 
sustaining and operating the scythe in the manner herein 

2. The revolving comb or straightener preceding the scythe and 
preparing the grass for its operation, in combination with the 
scythe, constructed and operating as herein described.

3. The hinder caster wheel, in combination, as herein described, 
by which the hinder end of the machine can be raised or lowered 
at pleasure.

In testimony whereof I, the said David Lewis, have subscribed my 
name, in presence of the witnesses whose names are hereunto 
subscribed, on the 12th day of March, A. D. 1838.


In presence of Moses Patten, Benjamin V. Pakunee.