Improvements in Sheaf-binding and Trussing Machines.
Year: 1889

page_text: Date of Application, 19th Aug., 1889
Complete Specification Left, 7th May, 1890-Accepted, 14th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Sheaf-binding and Trussing Machines.
We, JAMES HAROLD HOWARD and GEORGE GIBBS, both of Bedford in the County
of Bedford, Engineers do hereby declare the nature of this invention to be as
follows:-
Our invention relates to sheaf-binding and trussing machines and more particularly
to the ejectors or devices for throwing out or discharging the bound sheaves or
trusses.
In sheaf-binding or trussing machines as hitherto constructed wherein the so called
Appleby knotting-mechanism is employed, for example as described in the Speci-
fication of former Letters Patent dated 25th August A.D. 1885 No. 10,060, the
device for ejecting the bound sheaves or trusses consists of arms or prongs which are
at all times rigid throughout their entire length, and which are firmly attached to
the cam shaft or to the cam-dise which operates the knotting-mechanism. It has
been found in practice that, in operating upon interlaced or tangled crops there is
liability to accident by the outgoing sheaf or truss becoming entangled with the
said rigid arms or prongs and being carried over into the knotting mechanism, with
consequent risk of injury to the machine.
To obviate this defect, we construct the ejector with arms or prongs which will
be rigid during that portion of the revolution of the cam-shaft in which the ejection
of the sheaf or truss is effected, but which, on arriving at the position where the
sheaf or truss should fall from them, will bend or yield so that they will offer no
impediment to the falling of the sheaf or truss from the machine.
For this purpose, we prefer to use jointed arms, one part of each arm being fixed
on the cam-shaft and having the other part suitably jointed or pivoted to it. The
said arm is arranged in combination with a fixed or stationary cam or other suitable
device whereby the pivoted portion of the said arm will be operated in such a
manner as to cause the bending of the arm at the proper time to effectually release
the sheaf or truss. We sometimes form or fix on the bracket which carries the
knotting mechanism, a cam having a groove in which is arranged to work a roller
fitted to rotate upon a stud fixed in the pivoted portion of the arm or prong. This
cam-groove is so shaped that, in the rotation of the cam-shaft, the said arm or prong
will be alternately bent or withdrawn from the sheaf or truss and straightened or
extended as required.
It is obvious that the said arms or prongs may be arranged in combination with
other suitable means for operating them so as to ensure the release of one sheaf or
truss before the said arms or prongs return for the purpose of ejecting another sheaf
or truss.
DL: fol 1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Sheaf-binding and Trussing Machines.
We, JAMES HAROLD HOWARD and GEORGE GIBBS, both of Bedford, in the County
of Bedford, Engineers, 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:—
Our invention relates to sheaf-binding and trussing machines and more particularly

page_text: to the ejectors or devices for throwing out or discharging the bound sheaves or
trusses.
In sheaf-binding or trussing machines as hitherto constructed wherein the so called
Appleby knotting-mechanism is employed, for example as described in the speci-
fication of former Letters Patent dated 25th August A.D. 1885, No. 10,060, a device
for ejecting the bound sheaves or trusses consists of arms or prongs which are at all
times rigid throughout their entire length, and which are firmly attached to the
cam-shaft or to the cam-disc which operates the knotting-mechanism. It has been
found in practice that, in operating upon interlaced or tangled crops, there is a
liability to accident by the out-going sheaf or truss becoming entangled with the said.
rigid arms or prongs and being carried over into the knotting-mechanism, with
consequent risk of injury to the machine.
To obviate this defect, we construct the ejector with arms or prongs which will be
rigid during that portion of the revolution of the cam-shaft in which the ejection of
the sheaf or truss is effected, but which, on arriving at the position where the sheaf
or truss should fall from them, will yield so that they will offer no impediment to the
falling of the sheaf or truss from the machine.
For this purpose, we prefer to use jointed arms, one part of each arm being fixed
on the cam-shait and having the other part suitably jointed or pivoted to it. The
said arms are arranged in combination with a fixed or stationary can or other
suitable device whereby the pivoted portion of each arm will be operated in such a
manner as to ensure its yielding at the proper time to effectually release the sheaf
or truss.
In the accompanying drawings, we have shown how our said invention may be
conveniently and advantageously carried into practice.
Figure 1 is a front elevation showing a portion of a sheaf-binding and trussing
machine with our improvements applied thereto.
Figure 2 is a side elevation thereof.
Figure 3 is a front elevation, and,
Figure 4 a side elevation, partly in vertical section, both drawn to an enlarged
scale, showing details of construction.
Liko letters indicate corresponding parts throughout the drawings.
A is the frame of the machine. A is a bracket secured to the said frame in any
convenient manner, and supporting in suitable bearings, a shaft or spindle B which,
carries at one extremity the tying and delivery mechanism, and which is driven by
spur or toothed gearing B'. C is an arm fitted upon the shaft B and firmly secured
thereon by means of a set-screw C¹ or in any other suitable manner.
D is an arm or
lever coupled at D' to the said arm C, and having a pin or stud D², upon which is
fitted to rotate an anti-friction roller D³. E is a cam formed or fixed on the
bracket A¹.
In the revolution of the shaft or spindle B, the arms C, D, turn with the said shaft,
and the anti-friction roller D³ moves around the cam E. The operative surface of.
this cam is so shaped that the arms C, D are kept extended (as shown in full lines in
Figures 2 and 4) during that part of the revolution necessary for the delivery of the,
bound sheaf, and the arm D is permitted to yield (as shown in dotted lines in
Figures 2 and 4) during that portion of such revolution in which the sheaf is liable
to be threaded upon, or become entangled with the said arm or lever D and carried
over by the same in the next revolution thereof.
We have herein before described and illustrated our improvements as applied to
only one of the delivery-arms or ejectors of the machine, that is to say, to that
nearest to the butt of the sheaf, which is most liable to become entangled with the
straw or the undergrowth that may be contained in the said sheaf.
Our said improvements are, however, also advantageously applicable to the other
delivery-arms or ejectors.
In applying our improvements to the other ejectors, we provide each of them with
a cam similar to the cam E and attached to the knotter-bracket or to some other
convenient part of the machine, the ejectors being jointed substantially as herein-
before described.

page_text: We sometimes form or fix on the bracket which carries the knotting-mechanism,
a cam having a groove in which is arranged to work the anti-friction roller on the
pivoted portion of the arm or prong. This cam-groove is so shaped that, in the
rotation of the cam-shaft, the said arm or prong will alternately yield or be withdrawn
from the sheaf or truss and straightened or extended as required.
It is obvious that the said arms or prongs may be arranged in combination with
other suitable means for operating them so as to ensure the release of one sheaf or
truss before the said arms or prongs move into the required position for ejecting
another sheaf or truss.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we wish it understood that
we claim :-
First. In a sheaf-binding or trussing machine, a revolving ejector or sheaf-delivery
arm which is kept extended during a portion of its revolution and is allowed to yield
during another portion thereof, for the purposes above specified.
Second. The improved sheaf-ejecting mechanism comprising the jointed revolving
arm, and the fixed cam constracted substantially as described with reference to the
accompanying drawing and operating as, and for the purposes, above specified.
Dated this 7th day of May 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.