IMPROVED LIFTING AND STEERING GEAR FOR DOUBLE FURROW AND OTHER PLOUGHS
Year: 1872

page_text: LETTERS PATENT to John Potterton Fison, of Teversham, in the
County of Cambridge, for the Invention of "IMPROVED LIFTING AND
STEERING GEAR FOR DOUBLE FURROW AND OTHER PLOUGHS,"
PROVISIONAL SPECIFICATION left by the said John Potterton Fison
at the Office of the Commissioners of Patents, with his Petition, on
the 4th May 1872.
"
I, JOHN POTTERTON FISON, of Teversham, in the County of Cam-
bridge, do hereby declare the nature of the said Invention for "IMPROVED
LIFTING AND STEERING GEAR FOR DOUBLE FURROW AND OTHER PLOUGHS," to be
as follows:-
My Invention relates to an improved combined lifting and steering
apparatus for ploughs which make two or more furrows at one time.
To the fore part of the framing is attached a bracket carrying a socket
through which passes a round rack rod jointed at its lower end to the
axletree of the wheels. A pinion is mounted to work in the side of the

page_text: socket and gear with the rack rod, which is made round, so that the
wheels may be turned in any direction, as hereafter described, without
disconnecting the pinion and rack. The spindle of said pinion is con-
. nected by a universal joint to a rod extending back to the handles of the
plough and provided with a handle by which it is operated to regulate
the depth of the furrows or to raise the plough entirely out of work if
desired. Adjusting screws at the lower end of the rack rod bear on the
wheel axletree and serve to regulate the breast of the plough on
uneven land. The socket also carries a worm which gears with a wheel
mounted on the said socket and keyed on the rack rod, a key groove in:
the latter permitting the wheel to move freely up and down thereon
with the socket when regulating the depth of the furrows as above
described. By rotating the worm the wheel and rack rod may be
partially rotated to turn or guide the wheels in any direction desired.
The worm is operated by a long rod and handle at the rear of the
plough, a universal joint or coupling being also provided in said rod.
Instead of a worm and worm wheel the latter may be a bevel wheel
gearing with a bevel pinion operated in a similar manner.
SPECIFICATION in pursuanco of the conditions of the Letters Patent,
filed by the said John Potterton Fison in the Great Scal Patent ?
Office on the 4th November 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
POTTERTON FISON, of Teversham, in the County of Cambridge, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of May, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did for Herself, Her beirs and successors, give
and grant unto me, the said John Potterton Fison, Her special licence
that I, the said John Potterton Fison, my executors, administrators,
and assigns, or such others as I, the said John Potterton Fison, my
executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, excrcise,

page_text: a is the framing of the plough, and b is a cast-iron socket and bracket
bolted to the framing a. In Figures 1 and 2 it is shown attached to
the front, and in Figures 4 and 5 to the centre of the plough; c is a
round rack rod jointed by a bolt or pin d to the axletree e of the guiding
wheels. Set screws & passing through shoulders formed at the lower
end of rack c on either side bear on the axletree e to enable the breasts
of the plough to be regulated on uneven land; g is a pinion mounted
in bearings 6' on the socket b, and gearing with the rack rod c which
is made round to serve as pivot for the wheels f, and so that they may
be guided in any direction without disconnecting the pinion g from the
rack. On the axis of the pinion g is keyed a worm wheel h, with which
gears a worm i on a short spindle mounted to turn in eyes cast on the
socket 6. This spindle is connected by a universal joint or coupling j
with a rod or shaft k extending back to the handles of the plough and
mounted in bearings and provided with a winch handle k¹ as shown.
The rack c passes through the socket 6 which may be moved freely up
and down thereon and gears with pinion g, whereby the framing of the
plough is supported and adjusted in any desired position for regulating
the depth of the furrow or raising the plough entirely out of work by
turning the handle k'; 7 is a worm wheel through which the rack rod c
passes, said wheel being also carried on the socket 6 which is enlarged
at the upper part, as shown in Figure 3, to receive the boss of the wheel
and provided with screws & working in a groove, as shown, to retain
the wheel in place and permit of its being rotated independently of the
socket b¹. The worm wheel is fitted with a gib key m received in a
corresponding key groove formed longitudinally in the rack c to cause
the latter to turn with the wheel and yet permit the wheel to move
with the socket freely up and down on the rack. A worm n mounted
in bearings at the side of the socket b, gears with and operates wheel /
for guiding the wheels in the direction desired. The worm spindle is
also connected by a double or universal joint with a rod or shaft o
extending back like the shaft & to near the handles of the plough and
provided with a winch handle o'. Instead of a worm wheel / may be a
bevel wheel, and the worm n a bevel pinion similarly operated and
mounted except that the bevel pinion would be placed at the rear instead
of beside socket b.