IMPROVEMENTS IN HARROWS
Year: 1881

page_text: LETTERS PATENT to Hugh Gearing Grant, of the Firm of Messrs. Bosshardt
and Grant, Patent Agents, of 24, Bull's Head Chambers, Hopwood Avenue,
Market Place, Manchester, in the County of Lancaster, for an Invention of
"IMPROVEMENTS IN HARROWS." A communication from abroad by Charles
Moulin, of Rouceux, in the Republic of France.
PROVISIONAL SPECIFICATION left by the said Hugh Gearing Grant at
..the Office of the Commissioners of Patents on the 12th February 1881.
HUGH GEARING GRANT, of the Firm of Messrs. Bosshardt and Grant, Patent
Agents, of 24, Bull's Head Chambers, Hopwood Avenue, Market Place, Manchester,
in the County of Lancaster.. "IMPROVEMENTS IN HARROWS." A communication
from abroad by Charles Moulin, of Rouceux, in the Republic of France.
The Invention relates to improvements in harrows employed for agricultural
purposes, and has for its object to make the teeth of such machines moveable when
obstructions present themselves. The teeth are made fixed and movable at suitable
times by means of a lever under the control of the operator. A number of cross
bars are fixed by means of wedges, and so arranged that one set of bars turns on
the said wedges as pivots.. The teeth of the arrow are fixed to turn with one
series of bars. To make the said teeth movable or fixed when required a hand
lever under the control of the operator is carried by an upright frame. A curved
rack is mounted on one set of cross bars, and a spring catch on the lower end of
the said lever gears therewith when it is desired to fix the teeth for harrowing,
and is raised therefrom when the teeth are lifted to clear obstructions thereto.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Hugh Gearing Grant in the Great Seal Patent Office on the 12th
August 1881.
HUGH GEARING GRANT, of the Firm of Messrs. Bosshardt and Grant, Patent
Agents, of 24, Bull's Head Chambers, Hopwood Avenue, Market Place, Manchester,
in the County of Lancaster. "IMPROVEMENTS IN HARROWS." A communication
from abroad by Charles Moulin, of Rouceux, in the Republic of France.
The Invention relates to improvements in harrows employed for agricultural
purposes, and has for its object the employment of means for lifting the teeth of
such machines when obstructions present themselves when harrowing. The harrow
may be forined with moveable or fixed teeth, as desired, and consists of a number
of cross bars fixed by means of wedges, and so arranged that one set of cross bars
turn on the said wedges as on pivots. The teeth turn with one series of bars.
To make the said teeth moveable or fixed when required a hand lever under the
control of the operator is carried by an upright frame. A curved rack or disc is
mounted on the bars, and a spring latch on the lower end of the lever enters in
one or the other notche in the curved rack and fix the teeth.
And in order that the Invention may be better understood I have attached
hereto a Sheet of Drawings, in which Fig. 1 is a plan, and Figs. 2 and 3 end views
of the improved harrow. The harrow is constructed of square bars B, B, being
suitably rounded off at their junctions with the cross bars T, T, being connected to
the same by means of iron wedges on which the bars B, B, are arranged to turn or
swivel, and on which bars the teeth D are fixed and turn therewith. To make
the said teeth moveable or fixed a lever L is employed on one of the bars B, and
and a disc O which is fixed on the cross bars T, T. This disc is provided with
rack teeth, into one of which the end of the lever P enters when it is required to
fix the teeth for harrowing. When the teeth are to become movable the short
lever M is turned into an upright position which removes the lever L out of
contact with the teeth on the disc O, and the teeth are thus rendered movable.
When the teeth are in an inclined position they are clear of obstructions. The
bars B are connected by means of bolts N to the bars H.
Having now described and indicated the nature of the Invention and means for
carrying the same into effect, I would have it understood that I claim,---
First. The form, construction, and arrangement of harrow, substantially as
described and indicated in the Drawing.
Secondly. Providing the barrow with fixed and moveable teeth for the purpose
of clearing obstructions.
In witness whereof, I, the said Hugh Gearing Grant, have hereunto set my
band and seal, this Tenth day of August, in the year of our Lord One
thousand eight hundred and eighty one.
HUGH G. GRANT. (L.S.)