Improvements in or relating to Chaff Cutting Machines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Chaff Cutting Machines.
I, GEORGE KELSEY, 13, Clarke Square, Highfield, City of Sheffield, Implement
Maker, do hereby declare the nature of my invention to be as follows:-
My invention relates to an appliance to be used in combination with chaff
cutting machines with the object of preventing any injury to the hands of the
attendant who is feeding it with straw or the like.
My object is not to provide a means or appliance which requires a distinct
operation by either the foot or other part of the body, if the hand or fingers of
the attendant are accidentally caught by the feed wheels or rollers, but to supply
an appliance that the arm of the hand so caught would put in action automatically
and at once cause the stoppage of the feed rollers.
I therefore fix upon the back of the rising mouth piece, at opposite sides,
suitable brackets to carry a roller or bar, which would extend across the straw
box about twelve inches or thereabouts behind the rollers.
One of the brackets has a bearing for the axle of the safety roller extending
in the form of the letter L, towards the feed rollers, the bearing in the opposite
bracket permits the roller axle to move sufficiently to accomplish its purpose.
The roller axle projects through the bracket with the elongated slot to the
back of the starting and stopping lever, and is connected with a spring, the
tendency of which is to pull that end of the roller to the far end of the slot in
the bracket.
The action is as follows: The safety roller being in its bearings, extends across
the straw box just above the straw, with the spring in tension, and to start the
machine the lever is pulled back to a position nearly close to the projecting
end of the roller axle: supposing the attendants hand is caught by the feed
rollers and is being drawn in, the arm just above the wrist comes in contact
with the safety roller or bar, causing it to rise out of its bearing and by the
action of the spring to be drawn along the slot in the bracket.
In doing this the axle catches against the starting lever and reverses its
position thus stopping the feed rollers.
The apparatus may act on either side of the straw box as the case may be,
and if preferred both brackets may be slotted.
Instead of a roller I may use a bar which would not revolve.
Dated the 25th day of March 1898.
ROBT. F. DRURY, C.P.A.,
Agent for Applicant.

page_text: Improvements in or relating to Chaff Cutting Machines.
I, GEORGE KELSEY, 13, Clarke Square, Highfield, City of Sheffield, Implement
Maker, do hereby declare the nature of this invention and in what manner the
sanie is to be performed, to be particularly described and ascertained in and by
the following statement:-
-
My invention relates to an appliance or an arrangement of mechanism to be
used in combination with chaff cutting machines, the object being to prevent
injury to the hands of the attendant who feeds the straw or the like material
to the toothed rollers.
My invention does not refer to or depend upon treadles or levers to be set in
motion by the foot, or pulled out of gear by a distinct movement requiring
thought and presence of mind to accomplish, but is a simple arrangement of
mechanism which is put into action at once and automatically if the hand is
caught and drawn forward, causing the instant stoppage of the feed rolls.
It is illustrated in the accompanying sheet of drawings, in which
Fig. 1, is a side view of a portion of a chaff cutting machine, showing the
position of the appliance.
Fig. 2, the bracket G.
Fig. 3. plan of a portion of same machine with appliance ready to act.
Fig. 4, similar plan with the appliance after action.
In carrying out my invention as shown in the drawings I fix to the back of
the rising mouth piece M, at each side, a suitable bracket G and G2, extending
backwards to the required distance say for example 12 inches or thereabouts
from the feed rolls 1 and D2.
These brackets carry the guard roller or bar F; the bracket G2, being provided
with a hole to receiver the short end of the roller axle, and to permit it con-
siderable freedom of movement, and the bracket G, see Fig. 2 having a
"bayonet" slot, that is a long horizontal slot G3, terminating with a short down-
ward slot G, within which part the long end of the roller axle is held out of
action. when the machine is at work. This end of the axle is long enough to
pass at the back of the starting and stopping lever E, when the machine is
working and the lever is in the position shown in Figs. 1 and 3.
A strong spring S, is secured at one end in any suitable position such as that
shown, and the other end is secured to the long end of the roller axle and is in
extension, or drawn out, when the roller is in position, its tendency therefore
is to pull the axle of the roller to the front end of the slot.
J
The action of the appliance so constructed is as follows:
The safety roller or bar being in its bearings, extends across the straw box
just above the straw and the spring is in tension.
The feed rollers are started by pulling back the lever E, to the position shown
in Fig. 1, nearly close to the projecting end of the roller axle.
Supposing the attendant pushes his hand too far into the straw so that it is
caught and dragged forward by the feed rollers, the part of his arm just above
the wrist must come in contact with the safety roller or bar and cause it to rise.
and the axle to be released from the downward slot G4, and to enter the hori-
zontal slot G³, when the spring S at once contracts and pulls the roller axle to
the forward end of the slot.
In performing this movement the axle strikes against and reverses the position
of the lever E. and instantly stops the feed rollers.
If preferred, both brackets may be slotted and a spring applied to each end
of the roller axle or bar.

page_text: As the movable roller or bar and its forward movement and action upon the
stopping lever, is the chief feature of my invention I may employ various modified
devices by which the roller may be set at liberty so as to move the lever and stop
the rolls, and equivalents for the spring, and other details may be used without
departing from the spirit of the invention, but:
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim, is;-
1-As a means for preventing accidents in chaff cutting machines, a safety
roller or bar F, held in brackets G and G³, and extending across the straw box C,
the axle of which is capable of being moved along a slot G³ by the reaction of a
coiled spring S (or its equivalent) so as to strike against and reverse the starting
lever E, as herein before described and shown.
2-The combination with a chaff cutting machine, a safety roller or bar passing
across the straw box, at one or both ends in a horizontal slot or slots when
released from a retainer supporting brackets to carry roller, and a spring to draw
back the said roller-and cause it to reverse the starting lever, as hereinbefore
described and set forth.
P T
1000
ROBT. F. DRURY, C.P.A.,
Agent for Applicant.
Bank Buildings, George Street, Sheffield.