An Improved Machine for Cutting Thistles on Grass and Pasture Land.
Year: 1892

page_text: Date of Application, 6th Apr., 1892
Complete Specification Left, 5th Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
An Improved Machine for Cutting Thistles on Grass and Pasture
Land.
We,
ERRINGTON THOMPSON, of Sewing Shields, Haydon Bridge, Northumber-
land, JOHN SYMM, of Newton, Stocksfield-on-Tyne, Northumberland, and JAMES
SYMM, of Newton, Stocksfield-on-Tyne, Northumberland, do hereby declare the
nature of this invention to be as follows:-
This invention relates to a machine for cutting thistles on grass or pasture land.
The machine consists of a set or sets of revolving knives, which are suitably
secured to an axle, carried in bearings on a frame. The frame is mounted upon
wheels and has shafts, so as to be drawn by a horse. The frame carrying the
knives may be raised and lowered by means of a suitable lever attachment, provided
with a handle or handle-bar.
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PROVISIONAL SPECIFICATION.
An Improved Machine for Cutting Thistles on Grass and Pasture
Land.
We, ERRINGTON THOMPSON, of Sewing Shields, Haydon Bridge, Northumber-
land, JOHN SYMM, of Newton, Stocksfield-on-Tyne, Northumberland, and JAMES
SYMM, of Newton, Stocksfield-on-Tyne, Northumberland, do hereby declare the
nature of this invention to be as follows:-
This invention relates to a machine for cutting thistles on grass or pasture land.
The machine consists of a set or sets of revolving knives, which are suitably
secured to an axle, carried in bearings on a frame. The frame is mounted upon
wheels and has shafts, so as to be drawn by a horse. The frame carrying the
knives may be raised and lowered by means of a suitable lever attachment, provided
with a handle or handle-bar.
The knives may be so fitted to the nate as to be parallel therete, or they may
arranged spirally.
The knives may have single or double action.
The frame may have a fixed bar for the knives to cut over.
The knives may be driven by any suitable arrangement from the wheels.
A cover may be fitted over the top of the knives.
ho
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.
COMPLETE SPECIFICATION.
An Improved Machine for Cutting Thistles on Grass and Pasture
We,
Land.
ERRINGTON THOMPSON, of Sewing Shields, Haydon Bridge, Northumber-
land, JOHN SYMм, of Newton, Stocksfield-on-Tyne, Northumberland, and JAMES
SYMM, of Newton, Stocksfield-on-Tyne, Northumberland, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention relates to a machine for cutting thistles on grass or pasture land.
The machine consists of a set or sets of revolving knives, which are suitably
secured to an axle carried in bearings on a frame. The frame is mounted upon
wheels and has shafts, so as to be drawn by a horse. The frame carrying the
knives may be raised and lowered by means of a suitable lever attachment, provided
with a handle or handle-bar.
The knives may be so fitted to the axle as to be parallel thereto, or they may be
arranged spirally.
The knives may have single or double action.
The frame may have a fixed bar for the knives to cut over.
The knives may be driven by any suitable arrangement from the wheels.
A cover may may be fitted over the top of the knives.
And in order that our said invention may be properly understood, we have here-
unto appended an explanatory sheet of drawings, whereon:-
Fig. 1 is a side elevation of our thistle cutter.
Fig. 2 is a plan.
Ri
2 to finalucing a onlaod detail viame

page_text: Referring to the drawings, whereon the same reference letters, wherever repeated,
indicate similar or like parts.
The machine consists of a frame a, which is carried in bearings on the short
inwardly projecting axles f¹ of the two side wheels . The shafts b for the horse
are connected to the frame by the bars p, which are pinned to the frame at pl.
The cross bar s connects the two bars p together.
Carried in bearings won the frame is a cross shaft f, from which arms project.
out radially. These arms carry, at their extremities, the cutters or knives g.
The axles of the wheels c have fitted loosely on them internally-toothed
wheels d, and, into the teeth of these wheels, toothed sliding-clutches j, on the
shaft, are capable of being slid, when desired, by means of the levers i, which are
fulcrumed on the frame at . The fulcruming nuts may have spiral springs on
them, as shown at Fig. 1. The hubs r, (see Figs. 5 & 6), of the wheels d, are
hollow, and have internal ratchet teeth in them, into which the pawls t of the
"trod" wheels 24, which are fitted to the axles f', catch, when the machine is going
forward, but which, when the machine is going backward, slide over said teeth and,
as a consequence, do not turn the wheels d.
is the cutting bar, which is suspended from the frame a.
The action of the machine is as follows:-When the machine is pulled forward,
the pawls & turn with the wheels c, and, as they catch in the ratchet teeth t' of the
hubs r, they drive the wheels d, pinion clutches j and the shaft f. The turning of
the shaft revolves the knives 9, so as to cut the thistles against the cutting bar q..
Should the machine be' backed, or be turning a corner, the pawls t simply slide
over the ratchet teeth, and do not turn the hubs or revolve the shaft ƒ and
knives.
If it is desired to stop the revolutions of the knives at any time, the clutches; are
moved out of gear, by means of the levers i.
When it is desired to lift or lower the frame, this can be done by pulling the
lever handle backwards or forwards. The lever operates the shaft e™ and
cranks e, which, in their turn, move the links k, so as to raise or lower the frame a.
m is a guard with holes in it, and into any one of these holes the spring pin n, on
lever handle, can be forced or locked at any time, so as to retain the handle and
frame in position.
o is a shield or cover.
The machine may be modified in its construction without departing from the
'principle of the invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The general arrangement and combination of parts of the thistle cutting
'machine, substantially as hereinbefore described and shown on the drawings
annexed..
2. A thistle cutting machine having revolving knives, arranged and operating,
substantially as hereinbefore described with reference to the drawings annexed.
Dated this 4th day of January 1893.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.