An Improvement in Self Binding and other Reapers.
Year: 1891

page_text: Date of Application, 7th Nov., 1891
Complete Specification Left, 2nd Dec., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
An Improvement in Self Binding and other Reapers.
I JOHN DRURY of Laceby near Grimsby in the County of Lincoln, Machinist
do hereby declare the nature of this invention to be as follows:-
My invention consists of an arrangement of levers and weights for the purpose of
keeping the elevating platform and other travelling endless canvas of reapers
always at an equal tension counteracting the contraction, expansion and other
variations of the canvas thus requiring less driving power and ensuring its
regular and even working. To effect this I run the non-driving canvas rollers
in loose carriages which are so guided that they can only move in a direction
at right angles to the rollers and in a plane parallel to the platform canvas.
On these roller carriages I fix an attachment eye. At any convenient place on the
frame or other suitable part of the reaper I fix a centre or fulcrum pin on which is
placed a lever with an adjustable weight on one arm so as to give the required
power to the other or short arm of the lever. At the end of the short arm I form a
hook and attach this hook to the eye on the loose roller carriage by a wire rope or
chain and conduct the rope or chain in the required direction by passing it over of
round grooved rollers. also divide this wire or chain at a convenient point and
attach the ends to a spiral spring to provide against and ease any sudden strain or
jerk. By using the lever I gain the greatest constant power with the least increase
of weight to the reaper.
For the inside elevating canvas I provide a second nondriving roller running in
loose carriages or blocks which slide in guides fixed at such an angle as to allow the
weight of the roller to press on the canvas the weight of the roller is such that the
canvas is kept at an equal tension.
Dated this Sixth day of November 1801
JOHN DRURY.
COMPLETE SPECIFICATION.
An Improvement in Self Binding and other Reapers.
I JOHN DRURY of Laceby near Grimsby in the County of Lincoln Machinist,
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:-
My invention consists of an arrangement of levers and weights for the purpose of
keeping the elevating platform and other travelling endless canvas of reapers always
at an equal tension counteracting the contraction. expansion and other variations of
the canvas thus requiring less driving power and ensuring its regular and even
working. To effect this I run the non-driving canvas rollers in loose carriages
which are so guided that they can only move in a direction at right angles to the
rollers and in a plane parallel to the platform canvas. On these roller carriages I
fix an attachment eye. At any convenient place on the frame or other suitable
part of the
reaper Í fix a centre or fulcrum pin on which is placed a lever with an
adjustable weight on one arm so as to give the required power to the other or short
arm of the lever. At the end of the short arm I form a hook and attach this hook
to the eye on the loose roller carriage by a wire cord or chain and conduct the cord
or chain in the required direction by passing it over and around grooved rollers.
I also divide this wire cord or chain at a convenient point, and attach the ends to a
spiral spring, to provide against and ease any sudden strain or jerk. By using the
[Price 6d.

page_text: lever I gain the greatest constant power with the least increase of weight to the
reaper. For the inside elevating canvas I provide a second non-driving roller
running in loose carriages or blocks which slide in guides fixed at such an angle as
to allow the weight of the roller to press on the canvas, the weight of the roller is
such that the canvas is kept at an equal tension.
In the accompanying drawings, a, Fig. 1, represents the travelling or endless
canvas apron; b, the non-driving roller; c, the loose carriages; d, attachment eyes;
the pins or fulcrums; f, the levers; g, adjustable weights on said levers; ", hooks
on the short ends of levers; h, wire cords or chaius; i, grooved rollers for guiding
same and spiral springs for easing any sudden strain or jerk.
e,
Fig. 2 is a view of one end of the elevating canvasses k being the outside one,
kept in tension by means of the weighted lever 1, acting on the wire cord or chain m,
in a similar manner to that previously described, but with the difference that the
fulcrum of the lever is placed at the end of same.
"
n represents the inside canvas, o being the second or additional non-driving
roller, the loose carriage or block working in the guides, which are fixed at a
sufficient angle to allow the weight of the roller to give the necessary pressure on
the canvas. Of course it will be understood that the same arrangement is carried
out at each end of the elevator canvasses, although one end only is shown in the
drawing.
I would wish it to be particularly understood that I do not confine myself to the
exact form or arrangement of levers and weights shown in the drawings; and
though I have described the weights as being adjustable, they may be fixed
permanently on the levers; or the levers themselves may be made of sufficient
weight to give the necessary pressure. Or the guides and s may be formed with a
series of holes, and a pin or bolt inserted in one of the same at any desired point, so
that the spiral spring may be made to give the necessary pressure.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
First The application of weights, adjustable or otherwise, acting on the non-
driving rollers of the endless travelling canvasses of reaping machines substantially
as shown and described.
Second-The arrangement of levers, with or without weights, adjustable or
otherwise, in combination with the springs placed in the divisions of the cords or
chains, as shown and described.
Third The arrangement of the second, or additional non-driving roller to the
inside elevating canvas, in combination with the guides placed at an angle, as shown
and described.
Dated this 19th day of December 1891.