IMPROVE- MENTS APPLICABLE TO DOUBLE FURROW PLOUGHS
Year: 1873

page_text: LETTERS PATENT to Jonas Walpole, of Antingham, near North
Walsham, in the County of Norfolk, for the Invention of "IMPROVE-
MENTS APPLICABLE TO DOUBLE FURROW PLOUGHS."
Sealed the 4th July 1873, and dated the 11th January 1873.
PROVISIONAL SPECIFICATION left by the said Jonas Walpole at the
Office of the Commissioners of Patents, with his Petition, on the
11th January 1873.
I, JONAS WALPOLE, of Antingham, near North Walsham, in the
County of Norfolk, do hereby declare the nature of the said Invention
for "IMPROVEMENTS APPLICABLE TO DOUBLE FURROW PLOUGHS," to be as
follows:-
This Invention consists in so forming the beams of double furrow
ploughs, and applying thereto certain mechanism as to enable the shares
of such said ploughs to be lifted and held up free of the surface of the
ground when the plough is out of work.
I propose to accomplish the above objects by the following means:-
I form the beams in two parts which I hinge together underneath, and I
affix a forked iron stay to the foremost divided parts of the said beams at

page_text: or near the aforesaid hinges. To the bottom end of the aforesaid fork I
affix one end of a chain, and lead the other end of the said chain between
the hindermost beams to an upright hand lever hinged to that beam
which carries the guiding handles of the plough, and I hinge the
aforesaid lever handle near to the guiding handles in order that the said
lever may be within reach of the ploughman, so that upon his pulling
the said lever towards him the hinged parts of the beams of the plough
will be opened and the beams moved out of the straight line they
previously occupied, and by these means the ploughshares will be lifted
from the surface of the ground, and may be held in that position by the
wheels of the plough, and a hook or catch for holding down the aforesaid
lever, the said hook being placed on the tie bar that connects the
guiding handles of the plough together.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Jonas Walpole in the Great Seal Patent Office
on the 11th July 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JONAS
WALPOLE, of Antingham, near North Walsham, in the County of
Norfolk, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of January, in the year of
our Lord one thousand eight hundred and seventy-three, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Jonas Walpole, Her special licence that I, the
said Jonas Walpole, my executors, administrators, and assigns, or such
others as I, the said Jonas Walpole, 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, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS APPLICABLE TO DOUBLE FURROW
PLOUGHS," upon the condition (amongst others) that I, the said Jonas
Walpole, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what

page_text: manner the same was to be performed, and cause the same to be filed
in the Great Scal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Jonas Walpole, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, that is to say :-
This Invention consists in so forming the beams of double furrow
ploughs, and applying thereto certain mechanism as to enable the shares
of such said ploughs to be lifted and held up free of the surface of the
ground when the plough is out of work.
I propose to accomplish the above objects by the following means:— _I
form the beams in two parts which I hinge together underneath, and I
affix a forked iron stay to the foremost divided parts of the said beams at
or near the aforesaid hinges. To the bottom end of the aforesaid fork I
affix one end of a chain, and lead the other end of the said chain between
the hindermost beams to an upright hand lever hinged to that beam
which carries the guiding handles of the plough, and I hinge the
aforesaid lever handle near to the guiding handles in order that the said
lever may be within reach of the ploughman, so that upon his pulling
the said lever towards him the hinged parts of the beams of the plough
will be opened, and the beams moved out of the straight line they
previously occupied; and by these means the ploughshares will be lifted
from the surface of the surface of the ground, and may be held in that
position by the wheels of the plough, and a hook or catch for holding
down the aforesaid lever, the said hook being placed on the tie bar that
connects the guiding handles of the plough together.
And in order to explain my said Invention more completely, I will
now proceed to describe the means by which it may be carried into
practical effect, reference being had to the illustrative Sheet of Drawings
accompanying theso Presents, and to the numeral figures and letters of
reference marked thereon respectively as follows:-
DESCRIPTION OF THE DRAWING.
afdanhla froow nlawah

page_text: these Figures similar letters of reference are employed to denote corres-
ponding parts.
A, A¹, mark the beams which are jointed at a; B is a wrought-iron
stay or lever fixed by its upper end to the short end A¹ of the beam A;
C is a lever pivotted at 6 to the beam A, as shewn; and D is a chain
connected by one end to the lever C, and by its other end to the stay or
lever B, the said chain passing between the beams of the plough; c is a
catch for holding down the lever C after it has been pulled down, as
represented at Figure 1.
Having now described the nature of my said Invention for "Improve- 1
ments applicable to Double Furrow Ploughs," and the means by which
it may be effected, I would remark in conclusion that I do not claim
the exclusive use of any of the separate parts above mentioned and
referred to, except in so far as the same may be employed in combination,
and for the purposes of my said Invention; and I hereby declare my 1
Invention to consist in and I claim the adaptation to double furrow
ploughs of the lever C, chain D, stay B, and catch c, in combination
with the jointed beams A, A', for the purpose above stated.
In witness whereof, I, the said Jonas Walpole, have hereunto set
my hand and seal, this Twenty-fifth day of June, in the year of 2
our Lord One thousand eight hundred and seventy-three.
JONAS WALPOLE. (L.S.)