IMPROVEMENTS IN MACHINES FOR CUTTING GRASS, CORN, OR OTHER PRODUCE
Year: 1885

page_text: I, 'GEORGE TANKARD, of Wood Lane Cottage, Skircoat, Halifax, in the county
of York, Mechanic, do hereby declare the nature of my said invention for
IMPROVEMENTS IN MACHINES FOR CUTTING GRASS, CORN, OR OTHER PRODUCE, to
be as follows
-
My Improvements consist in applying cams for driving the knives of mowing
and reaping machines, instead of toothed gearing as used in other machines, thereby
dispensing with a great amount of friction and at the same time simplifying the
machine
In my Improvements, I purpose placing the cams on the inside of the arm of
driving wheel, and of sufficient number to obtain the requisite number of cuts per
revolution of the wheels On the frame work of the machine I place a suitable
boss to carry the lever (for working the knives) which is of ordinary form with a
stud and runner fixed on short end to work in the groove of the cam
The long
end of lever I connect by means of a rod and universal joints to a bell crank lever,
the opposite end of which is connected to the cutter bar by rod and universal
Joints
The knives can be stopped by drawing the lever with the runner out of the
groove of cam, by means of the borizontal lever on the back of machine When
the knives are not in use the front part of frame can be raised clear of the ground
by lever placed on horse shafts
The the details of the machina now of and.

page_text: Produce.
GEORGE TANKARD of Wood Lane Cottage Skircoat Halifax in the County of
York, Mechanic, do hereby declare the nature of my invention for IMPROVEMENTS
IN MACHINES FOR CUTTING GRASS, CORN OR OTHER PRODUCE and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement
-
My Improvements consists in applying cams for driving the knifes of mowing
and reaping machines, thereby dispensing with a great amount of friction and
simplyfying the machines
In my Improvements I place a grooved cam inside the rim of the driving wheel
with sufficient rises to obtain the requisite number of cuts per revolution of the
wheel, within the groove of the cam is an antifriction bowl, free to revolve on a
stud in the upper end of a vertical lever the latter is mounted on a stud on the
frame, to the lower end of the vertical lever is a universall joint and connecting
rod attached which communicates with and is connected by universall joint to
the arm of a bell-crank lever, the other arm of the lever is by rod connected
to the cutter bar, and knifes, the latter can be stopped when required by with-
drawing the runner from the cam groove by means of a horizontal lever on the
frame
In order that my Invention may be fully understood I have hereunto annexed
1 sheet of Drawings illustrating my Improvements applied to a mowing machine
Fig 1 18 side elevation of part of machine sufficient to show my Improvements
applied thereto
Fig 2 18 plan with part of driving wheel in section shewing cam groove
The driving wheel 1 has a cam groove 2 to receive the antifriction bowl 3 the
latter being mounted on a stud in the vertical lever 4 which is free to osscilate on
the stud 5 in the boss of the frame 6 the lower end of vertical lever 4 is connected
by universall joint 7 connecting rod 8 bell crank lever 9 and connecting rod 10
to the ordinary knife bar, the lever 11 is for withdrawing the antifuction bowl 3
from the cam groove when the knifes are to be stopped
The action is as follows, as the wheel 1 revolves, the cum groove 2 will by the
antifriction bowl 3 cause the vertical lover 4 to oscillate on its fulcrum stud 5 the
lower end of the lever 4 will by connecting rod 8 bell crank lever 9 connecting
rod 10 give reciprocating motion to the ordinary knife bar
Having now particularly described and ascertained the nature of this my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1 The combination of the wheel 1 having cam groove 2 with bowl 3 lever 4
connecting rod 8 lever 9 connecting rod 10 as and for the purpose herein fully
described and illustrated
Dated this 25th day of February 1988