AN IMPROVED CONSTRUCTION OF HORSE-HOE."
Year: 1857

page_text: LETTERS PATENT to John Dunnell Garrett, of Saxmundham, in the
County of Suffolk, Agricultural Implement Maker, for the Invention of
"AN IMPROVED CONSTRUCTION OF HORSE-HOE."
PROVISIONAL SPECIFICATION left by the said John Dunnell. Garrett at
the Office of the Commissioners of Patents, with his Petition, on the
19th June 1857.
I, JOHN DUNNELL GARRETT, of Saxmundham, in the County of Suffolk,
Agricultural Implement Maker, do hereby declare the nature of the said
Invention for "AN IMPROVED CONSTRUCTION OF HORSE-HOE," to be as follows:
The chief object of this Invention is to facilitate the adjustment of the
mortice bar of horse-hocs to which the hoe levers are connected, the raising or
lowering of which bar regulates (as is well understood) the angle at which the
hoes are presented to the ground. Instead of effecting the adjustment by
hand, I support the mortice bar at its opposite ends by pairs of pendent rods;
which are severally jointed to travelling nuts carried by a pair of screw shafts
mounted at opposite ends of the framing. These shafts are each provided
with right and left-handed screw threads, and they are turned by means of
winch handles. Jointed to each end of the mortice bar is a guide bar, which
works in a guide or socket piece bolted to the framing. These guide bars

page_text: and sockets are intended to guide the mortice bar in its upward and downward
movements. The rise or fall of the mortice bar (at either end) is effected by
turning the screw shafts, which will cause the huts of each pair of pendent
rods to approach to or recede from each other, and thereby increase or diminish
the space between the mortice bar, and the framing of the implement, according
to the direction of rotation imparted to the screw shafts.
"Another improvement which I propose to effect is to connect the steering
iron directly to the mortice bar, which arrangement gives the attendant
increased command over the implement.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Dunnell Garrett in the Great Seal Patent Office on
the 19th December 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
DUNNELL GARRETT, of Saxmundham, in the County of Suffolk, Agricultural
Implement Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of June, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Dunnell Garrett, Her special license that I, the said John
Dunnell Garrett, my executors, administrators, and assigns, or such others as
I, the said John Dunnell Garrett, 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 IN HORSE-ZOES," upon the condition (amongst others) that I,
the said John Dunnell Garrett, by an instrument in writing under my
hand and seal, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said John Dunnell Garrett, 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 follow-

page_text: ing statement, reference being had to the Drawing hereunto annexed, and to
the letters and figures marked thereon (that is to say):
This Invention consists in an improved mode of suspending the mortice bar
of horse-hoes, or that bar to which the hoe levers are connected, the object
being to facilitate the raising and lowering of that bar for the purpose of
adjusting the hoes to the proper angle for working, according to the nature of
the ground to which the implement is to be applied.
:
In the accompanying Drawing, Fig. 1 is a plan view of so much of a horse-
hoe with my improvements attached as will serve to explain the nature and
operation of the Invention; Fig. 2, a longitudinal sectional elevation of the
same, taken in the line 1, 2, of Fig. 1; and Fig. 3 is a cross section, taken in
the line 3, 4, of the same Figure. In these Figures, instead of effecting the
adjustment of the mortice bar by hand or by hand levers, as hitherto, it will
be seen that I support it at its opposite ends by jointing thereto pairs of
pendent rods or levers, which, in proportion as they are opened out or brought
nearer together, will raise or depress the mortice bar, and effect the desired
change in the angle of inclination of the hoes. a, a, is the ordinary framing
of the implement, at the opposite sides of which one of a pair of screw.
shafts b, b, is mounted, so as to be capable of being turned in their bearings
without receiving an endway motion; they are each provided with a right and
Jeft-handed screw thread, to which are fitted travelling nuts c, c, tapped to
work on the screw threads and move (as the shafts are turned) towards or
from each other, according to the direction of rotation of the screw shafts.
Jointed to and pendent from these nuts are rods or levers d, d, which are
jointed in pairs, at their lower ends, to the extremities of the mortice bar e,
and serve to support that bar in a horizontal or other desired position. The
rotation of the screw shafts is effected by means of winch handles applied to
their squared heads, which project beyond and in rear of the framing.
Mounted loosely upon a plain portion of each of the shafts b, and at about the
middle of their length, is a swinging guide f, intended to receive one of a pair
of guide bars or rods g, which are jointed to the opposite ends of the mortice
bar e.
These swinging guides and guide bars are employed to steady the
mortice bar in its upward and downward movements, but it should be stated
that they are not absolutely necessary for the efficient action of the implement.
h, h, are the hoe levers, which are connected, as usual, to the mortice bar e,
and are supported and raised in any ordinary manner at their hinder ends;
and i, i, are the hoes, secured in slots in their respective levers. From the
above explanation it will be understood that when it is required to raise or
lower the mortice bar, it is only necessary to turn the screw shafts, the

page_text: rotation of which will cause the nuts of each pair of pendent rods or levers to
approach to or recede from each other, and thereby increase or diminish the
space between the mortice bar and the framing of the implement, according to
the direction of rotation imparted to the screw shafts; by which means (the
level of the hind ends of the hoe levers being at the same time unaltered) the
angle of inclination of the hoes to the ground will be changed, as desired. In
order to effect the endway movement of the mortice bar, which movement is
requisite to bring the hoes into a line with their work, I connect the steering
iron (see Fig. 3) to the mortice bar without any intermediate line or other
contrivance, which arrangement gives the attendant increased command over
the implement.
Having now set forth the nature of my. Invention of "Improvements in
Horse-hoes," and explained the manner of carrying the same into effect,
I wish it to be understood that, under the above in part recited Letters Patent,
I claim suspending the mortice bar of such implements by means of pendent
rods or expanding levers, which, as their angle of inclination is changed by the
rotation of screws or their equivalent, will raise or lower the bar, and thereby
adjust the hoes to the required angle for entering the ground. "
In witness whereof, I, the said John Dunnell Garrett, have hereunto set
hand and seal, the Seventeenth day of December, in the year of
our Lord One thousand eight hundred and fifty-seven.
my
JNO. D. GARRETT. (L.S.)
Witness,
WILLIAM HEARD,
Clerk to Messrs. R. Garrett & Sons,
Leiston, Suffolk.