Improvements in Sheaf Binding Harvesters.
Year: 1895

page_text: Date of Application, 24th Sept., 1895
Complete Specification Left, 24th June, 1896--Accepted, 15th Aug., 1896
PROVISIONAL SPECIFICATION.
Improvements in Sheaf Binding Harvesters.
I ALEXANDER MCGREGOR, of Albion Iron Works, Leigh in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows
The first part of this invention relates to the manner of adjusting and keeping
the main driving chain at a uniform degree of tightness, and so as to be unaffected
by the raising or lowering of the machine.
According to this arrangement, a radius bar is supported at one end by a link
which hangs loosely on the main driving wheel shaft and at the other end by a pin
which is placed directly under the second motion shaft and fixed by preference to
the bracket which carries the bearing of that shaft, and which is secured to the side
of the gear frame of the machine.
At the side of the radius bar, and carried by the same fixed pin, I place a
vibrating arm or carrier on which is mounted the chain tightening wheel. The
forward end of this arm or carrier is free to move radially up and down, and is
guided in position at the side of the radius bar by means of a rebated slip which is
rivetted or otherwise secured to the bar; while the radial, movement of the arm or
carrier is controlled by means of an adjusting screw, so as to give the desired
degree of tightness to the chain; a spiral spring being placed on this adjusting
screw so as to admit of the arm or carrier, and with it the chain tightening wheel,
yielding to any sudden jerk or extra strain.
The next part of my improvement relates to the manner of actuating the
compressor arm without having recourse to the usual cam on the side of the wheel
which drives the knotter shaft.
The compressor arm is secured to a spindle in the ordinary manner, and on the
forward end of this spindle I fix a crank or lever, having a roller arranged in a
position to be acted upon by cams or arms which are formed in one with, or
secured to, the crank which is fixed to the forward end of the needle shaft and
actuates the same.
According to this arrangement, when the needle is at rest one of the before-
mentioned arms presses against the roller and keeps the compressor arm in position
for the grain to be packed against it in the usual manner. On the binding
apparatus coming into gear and the needle commencing to rise, the armn leaves the
roller, but at the same time the crank which carries the roller is kept in position
by means of a spring catch which gears into the end of the same until such time as
the needle has nearly completed its outward travel, when the eccentric end of
another arm on the needle crank comes in contact with the roller and causes the
compressor arm to rise still further, meeting the needle, and giving the final
compression to the sheaf; the before-mentioned spring catch being provided with.
an extension which comes into gear with the end of the roller crank so as to
maintain the compressor arm in its highest position.
On the needle receding from the sheaf and arriving at the point corresponding to
that at which the binding is finished and the discharge arms are about to deliver
the sheaf, a tooth on the back of the needle crank gears into a spring pawl which
is jointed to the spring catch, and forces the latter out of gear with the end of the
roller crank and consequently allows the compressor arm to fall so as to admit of

page_text: the sheaf being discharged. At a point before the needle, comes to rest, the first
mentioned arm comes in contact with the roller, and raises the compressor arm to
the position for the grain to be packed against it; at the same time the catch has,
by means of its spring, been forced into its first position, ready to gear into the end
of the roller crank immediately the needle commences to rise.
As a modification of the arrangement for giving the final compression to the
sheaf, in lieu of the arm having the eccentric end, the roller crank may be formed
with a tooth, which, at the finish of the needle's outward travel, engages with a
corresponding tooth on the back of the needle crank, which operates the roller
crank sufficiently to raise the compressor arm to its highest point; the teeth being
so formed as to escape each other when the needle crank arrives at the position
where the compressor arm has to fall before the outgoing sheaf.
A similar result may be arrived at by having a tooth on the boss of the needle
gearing into a tooth on the boss of the bracket which carries the compressor arm,
but I prefer the previously described arrangement, as the torsion of the spindle
between the roller crank and the compressor arm admits of the latter slightly
yielding in the event of any extra severe strain.
Although I have described the arms and teeth as being formed in one with the
needle crank, 1 do not confine myself to that particular manner of construction
and the same object may be accomplished if the arms or teeth are formed separate,
and adjustably or otherwise secured to the needle crank.
The next part of my improvement relates to the manner of putting the
binding apparatus into gear immediately on sufficient grain being accumulated to
form a sheaf.
A trip lever is adjustably secured to a bracket baving an arın or extension which
carries a roller controlled by a cam on the buss of the needle in the usual-manner;
the trip lever bracket being secured to a spindle which is carried in a bearing
formed in, or secured to the packer shaft bracket; the said spindle being formed
with a crank at its forward end having a pin which gears into a slot formed in the
stop arm; the latter being carried on a pin centred at a point below the spindle of
the trip lever bracket. Carried by the same pin is a lock pawl which placed by
the side of the stop arm and has a movement in unison with it, but is also capable
of the additional lift governed by a spring necessary to admit of its rising over the
ratchet teeth in the pawl plate when the stop arm has forced the driving dog out of
gear with the driving rollers.
The packer crank shaft is actuated by the square shaft driven by a chain wheel
at the back of the machine in the ordinary manner, but instead of attaching the
driving rollers to the forward arm of the crank shaft, as is usual a journal is formed
between the forward crank arm and the driving plate which carries the rollers.
This journal is carried in a bearing attached to the binder frame; and the driving
plate together with the journal are bored out or formed with a central hole or
bearing to receive the end of the binder driving shaft, which at this part is reduced
in size to fit the hole in the driving plate and the journal, so as to leave a shoulder
to bear against the face of the driving plate and thereby dispense with a boss on
that side of the dog carrier which is next to the driving plate; the shaft forming
an abutment for the driving dog in either its locked or unlocked positions, and the
dog carrier being secured to the shaft at the necessary distance from the driving
plate to admit of the rollers clearing the side of the driving dog. The driving dog
is attached to the carrier by means of a pin or bolt which is carried through the
entire length of the boss of the carrier and secured by a nut, for convenience of
removal.
Dated this 23rd day of September 1895

page_text: Improvements in Shear Binding Harvesters.
I ALEXANDER MCGREGOR, of Albion Iron Works, Leigh, in the County of
Lancaster, Engineer, 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 :-
The first part of the invention relates to the manner of adjusting and keeping
the main driving chain at a uniform degree of tightness, and so as to be unaffected
by the raising or lowering of the machine.
+
According to this arrangement, a radius bar (see Fig. 1 of the annexed
drawings) is pin jointed to and supported at one end by a link h' which hangs
loosely on the main driving wheel boss or shaft i and at the other end by a pin h³
which is placed directly under the second motion shaft and fixed by preference
to the bracket which carries the bearing of that shaft, and which is secured to
the side of the gear frame 3 of the machine.
At the side of the radius bar, and carried by the same fixed pin ² I place a
vibrating arm or carrier on which is mounted the chain tightening wheel shown
in dotted lines around the pin h. The forward end of this arm or carrier is free
to move radially up and down, and is guided in position at the side of the radius bar
by means of a rebated clip which is rivetted or otherwise secured to the bar;
while the radial up and down movement of the arın or carrier and with it the chain
tightening wheel is controlled by means of an adjusting screw 4° and finger nut so
as to give any desired degree of tightness to the main driving chain; a spiral
spring h' being placed on this adjusting screw so as to admit of the arm or carrier,
and with it the chain tightening wheel yielding to any sudden jerk or extra
strain.
The next part of my improvement relates to the manner of actuating the
compressor arm without having recourse to the usual cam on the side of the wheel
which drives the knotter shaft, the particular arrangement of which is shown in
Figs. 2, 3 and 4.
The compressor arm k is secured to a spindle in the ordinary manner, and on the
forward end of this spindle 1 fix a crank or lever k¹ having a roller arranged in
a position to be actuated upon by cams or arms which are formed in one with,
or secured to, the crank which is fixed to the forward end of the needle shaft ³
and actuates the same.
According to this arrangement, when the needle is at rest as shown in Fig. 2,
one of the before mentioned arms presses against the roller and keeps the
compressor arm in position for the grain to be packed against it in the usual
manner. On the binding apparatus coming into gear and the needle commencing
to rise, the arm leaves the roller k², but at the same time the crank k¹ which
carries the roller is kept in position by means of a spring catch m which gears into
the end of the same until such time as the needle has nearly completed its outward
travel, when the eccentric end of another arın 2 on the needle crank comes in contact
with the roller k² and causes the compressor arm to rise still further as shewn at
Fig. 3, meeting the needle, and giving the final compression to the sheaf; the
before-mentioned spring catch being provided with an extension m¹ which comes
into gear with the end of the roller crank so as to maintain the compressor arm in
its highest position.
On the needle receding from the sheaf and arriving at the point corresponding
to that at which the binding is finished and the discharge arms are about to deliver
the sheaf a tooth on the back of the needle crank gears into a spring pawl n

page_text: which is jointed to the spring catch m, and forces the latter out of gear with the end
of the roller crank k¹ and consequently allows the compressor arm to fall as shown
in Fig. 4, so as to admit of the sheaf being discharged. At a point before the
needle comes to rest, the first mentioned arm comes in contact with the roller and
raises the compressor arm to the position for the grain to be packed against it; at
the same time the catch m has, by means of its spring m been forced into its first
position, ready to gear into the end of the roller crank immediately the needle
commences to rise.
As a modification of the arrangement shown in Fig. 3 for giving the final
compression to the sheaf, in lieu of the arm & having the eccentric end, the roller
crank may be formed as shown in Fig. 5, with a tooth k' which, at the finish of the
needle's outward travel, engages with a corresponding tooth on the back of the
needle crank, which operates the roller crank sufficient to raise the compressor
arm to its highest point; the teeth being so formed as to escape each other when
the needle crank arrives at the position where the compressor arm has to fall before
the outgoing sheath.
A similar result may be arrived at by having a tooth on the boss of the needle,
gearing into a tooth on the boss of the bracket which carries the compressor arm,
but I prefer the previously described arrangement shown in Fig. 5, as the torsion
of the spindle between the roller crank and the compressor arm admits of the latter
slightly yielding in the event of any extra severe strain.
Although I have described the arms and teeth as being formed in one with the
needle crank, I do not confine myself to that particular manner of construction and
the same object may be accomplished if the arms or teeth are formed separate,
and adjustably or otherwise secured to the needle crank.
The next part of my improvement relates to the manner of putting the binding
apparatus into gear immediately on sufficient grain being accumulated to form a
sheaf.
A trip lever o Figs. 6 and 7, is adjustably secured to a bracket o¹ having an arm
or extension as shown in dotted lines o' which carries a roller controlled by a cam
on the boss of the needle in the usual manner; the trip lever bracket being secured
to the spindle p which is carried in a bearing p¹ formed in, or secured to the packer
shaft bracket p; the said spindle being formed with a crank at its forward end
having a pin which gears into a slot q formed in the stop army; the latter being
carried on a pin q' centred at a point below the spindle of the trip lever bracket.
Carried by the same pin is a lock pawl q which is placed by the side of the stop
arm and has a movement in unison with it, but is also capable of the additional
lift governed by a spring 9' necessary to admit of its rising over the ratchet
teeth q in the pawl plate 9 when the stop arm has forced the driving dog q' out
of gear with the driving rollers q³.
The packer crank shaft is actuated by the square shaft r' driven by a chain
wheel at the back of the machine in the ordinary manner, but instead of attaching
the driving rollers to the forward arm of the crank shaft, as is usual, a journal
(Fig. 8) is formed between the forward crank arm and the driving plate which
carries the rollers 98. This journal is carried in a bearing attached to the binder
frame ; and the driving plate together with the journal are bored out or formed
with a central hole or bearing to receive the end of the binder driving shaft q°,
which at this part is reduced in size to fit the hole in the driving plate and the
journal, as shown in Fig. 8, so as to leave a shoulder to bear against the face of the
driving plate, and thereby dispense with a boss on that side of the dog carrier s
which is next to the driving plate; the shaft forming an abutment for the driving
dog in either its locked or unlocked positions, and the dog carrier being secured to
the shaft at the necessary distance from the driving plate to admit of the rollers q
clearing the side of the driving dogs. The driving dog is attached to the carrier
by means of a pin or bolt 3 which is carried through the entire length of the boss
of the carrier and secured by a nut, for convenience of removal.

page_text: 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 :-
1. In sheaf binding harvesters the arrangement for adjusting the main driving.
chain to a uniform degree of tightness, as shown and described in reference to
Fig. 1.
2. In sheaf binding harvesters, the manner of actuating the compressor as shown.
and described in reference to Figs. 2, 3, and 4.
3. In sheaf binding harvesters, the manuer of actuating the compressor in
combination with the extension on the spring catch and the eccentric end on the
arm of the needle crank for giving the final compression to the sheaf.
4. In sheaf binding harvesters, the manner of actuating the compressor in
combination with the tooth on the roller crank and the corresponding tooth on the
needle crank for giving the final compression to the sheaf as described in reference
to Fig. 5.
5. In sheaf binding harvesters the arrangement for putting the binding apparatus
into gear as shown and described in reference to Figs. 6 and 7.
6. In sheaf binding harvesters, forming a journal between the forward packer
crank and the driving plate, the same forming a bearing for the end of the binder
driving shaft as shown and described in reference to Fig. 8.
7. In sheaf binding harvesters, the driving dog and carrier formed in the manner
shown and described.
Dated this 23rd day of June 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.

page_text: Date of Application, 24th Sept., 1995
Complete Specification Left, 24th June, 1896-Accepted, 5th Sept. 1896
PROVISIONAL SPECIFICATION.
Improvements in Sheaf Binding Harvesters.
I ALEXANDER MCGREGOR, of Albion Iron Works, Leigh, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
The first part of this invention relates to the manner of actuating that part of
a sheaf binding harvester known as the "Buttor" which is used for arranging the
butt ends of the grain on the binder deck into suitable form for being bound into
sheaves.
"
" Buttors as hitherto in use have usually been either of two descriptions; the
ore a ribbed endless canvas running upon rollers, and the other known as the
"vibrating buttor," usually a piece of board or a sheet iron plate, fitted with
projecting pieces or teeth on its inner side, and actuated at its upper end by a
crank which imparts an equal up and down and in and out movement; while the
lower end is usually carried by a swivel block, sliding to and fro on an adjustable
supporting arm or rod; or in some cases by a single rocking lever, one end of
which is jointed to the "buttor" board and the other to the outer end of the arm
or rod.
These improvements relate to the vibrating type of "buttor," which in this
case is supported and operated by a crank at its upper end in the usual manner.
In order to support the lower end of the "buttor" and give it a more parallel
and free movement than that obtained by either of the before mentioned methods,
I make use of a pair of jointed links, one end of the one being connected to the
buttor board, and one end of the other to the lower or outer end of an arm or
The forward end of these links are jointed together by means of a pin or
bolt, around which I attach one end of a connecting rod the other end being
attached to, and actuated by a crank which is secured in such position and has
the necessary "throw" to move the forward ends of the links one half the distance
that the ordinary crank moves the "buttor" board.
crane.
The crane may be supported at a point on the front of the elevator frame in
the usual manner, or it may be carried in bearings concentric with the spindle or
shaft which carries the main "buttor" crank, so that any adjustment of the crane,
by means of the shifter bar may be effected without detracting from the efficiency.
of the parallel movement.
According to the ordinary manner of construction, the "buttor" crank being
connected to the "buttor" board by means of an arm fixed to the latter, imparts
to it an equal up and down and in and out movement; which latter, more
especially when dealing with straight dry grain, frequently over-does the end
adjustment; butting the grain further end ways than is desired, such excessive
movement being consequent on the long travel necessary to bring the grain down
the deck, being too much for the end adjustment.
The next part of my invention consists in giving the "buttor" board such
movement that it shall have the full length of stroke necessary for bringing the
grain downwards to the knotter, but only a fraction of, or say one half, such stroke
end ways of the grain.
In order to accomplish this object, according to one method of construction
" to the
instead of using the before-mentioned fixed arm for connecting the " buttor
crank, 1 make use of an arrangement in which the up and down movement is

page_text: communicated to the "huttor" by means of a jointed arm or connecting rod driven
by the ordinary crank, while the in and out movement is obtained by means of
another connecting rod driven by a crank having its crank pin or point of
connection midway between that of the ordinary crank and the centre of the crank-
shaft. This same short-throw crank pin is also available for actuating the rod
which controls the motion of the forward ends of the links, as described, in the
first part of this invention.
According to another method of giving the long up-and-down and the short
in-and-out movement to the "buttor," I'make use of an arrangement in which the
"buttor" crank has only sufficient throw for giving the short in-and-out movement,
and in order to give the longer stroke for the up-and-down movement I make use
of a sway beam or rocking lever which is centred on the crank pin and has one
end jointed to the fixed" buttor" arm and the other end held or controlled by a
rod or link which is jointed to some convenient place on the elevator front so that
by holding the outer end of the rocking lever the inner end of the same is
compelled to make a stroke of double the length of that which is imparted to
the rocking lever by the crank, and consequently give the long up-and-down
movement to the "buttor," while the in-and-out movement is only such as is due
to the actual throw of the "buttor" crank. In this case, the crank pin which
carries the rocking lever is also available for actuating the rod which controls
the forward ends of the previously described links, giving them one half the
movement which the rocking lever imparts in an up-and-down direction to the
❝ buttor."
The next part of this invention relates to the manner of applying an automatic
tension to the twine, so that it may be released when the needle is at rest, and
come into operation as each sheaf is being bound. At a convenient position on the
binder frame I mount a bracket, having two string eyes or guides, one on either
side, and having a tension clamp or lever placed between the string eyes, the
clamp being jointed to the bracket and adjustable thereto by means of a thumb
screw and spring; the twine being passed through the string eyes and under the
clamp on its passage from the twine box to the needle in the ordinary manner:
In order to effect the object of this part of the invention 1 form the tension
clamp with an arm or lever in such a position that just as the needle comes to
rest at the end of its return stroke this arm is caught by a projecting tooth
formed upon the needle shaft crank arm, by which means the tension clamp is
lifted from the twine and kept in that position during the period the needle is at
rest; thereby allowing the twine'to pay out freely, while the grain is being packed
into the binding receptacle and the sheaf is forming. Immediately on sufficient
grain being packed to form a sheaf, and the needle commencing its forward travel
the tooth on the needle crank recedes from the arm of the tension clamp; thereby
allowing the clamp to come into operation and press on the tivine' more or less,
according as the spring may have been previously adjusted; the pressure continuing
during 'the time the sheaf is being bound and until the needle again returns to its
position of rest.
A's a' inodification of this arrangement, the action of the tension clamp may be
controlled by means of a rod and lever or other suitable contrivance, actuated 'by
a cum or tooth, formed on the boss of the wheel which drives the knotter shaft.
This cam may be formed, so as to release the tension immediately the sheaf is
bound; or at any other suitable period during the travel of the needle, in 'addition
to that at which the needle is at rest.
According to a further modification, the tension clamp is placed at the back of
the binding apparatus, and actuated by a cam or crank on the back end of the
needle shaft.
Dated the Ruddat
100''
[

page_text: I ALEXANDER MCGREGOR, of Albion Iron Works, Leigh, in the County of
Lancaster, Engineer, 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 :-
The first part of this invention relates to the manner of actuating that part of a
sheaf binding harvester known as the "Buttor" which is used for arranging the
butt ends of the grain on the binder deck into suitable form for being bound into
sheaves.
"
" Buttors as hitherto in use have usually been either of two descriptions; the
one a ribbed endless canvas running upon rollers, and the other known as the
"vibrating buttor," usually a piece of board or a sheet iron plate fitted with
projecting pieces or teeth on its inner side, and actuated at its upper end by a
crank which imparts an equal up and down and in and out movement; while the
lower end is usually carried by a swivel block, sliding to and fro on an adjustable
supporting arm or rod; or in some cases by a single rocking lever, one end of
which is jointed to the "buttor "board and the other to the outer end of the arm
or rod.
These improvements relate to the vibrating type of "buttor," which in this case
is supported and operated by a crank at its upper end in the usual manner.
In order to support the lower end of the "buttor," and give it a more parallel
and free movement than that obtained by either of the before mentioned methods,
I make use of a pair of jointed links, a¹ a² (see Figs. 1 and 2 on the annexed
drawings) one end of the one being connected to the buttor board a, and one end
of the other to the lower or outer end of an arm or crank b. The forward ends of
these links are jointed together by means of a pin or bolt, around which I attach
one end of a connecting rod c the other end being attached to, and actuated by a
crank which is secured in such position and has the necessary "throw to move
the forward ends of the links one half the distance that the ordinary crank & moves
the "buttor" board.
The crane may he supported at a point on the front of the elevator frame in the
usual manner, or it may be carried in bearings concentric with the spindle or shaft d
which carries the main "buttor" crank, so that any adjustment of the crane by
means of the shifter bar 6' may be effected without detracting from the efficiency
of the parallel movement.
According to the ordinary manner of construction, the "buttor" crank d being
connected to the "buttor" board by means of an arm e fixed to the latter, imparts
to it an equal up and down and in and out movement; which latter, more especially
when dealing with straight dry grain, frequently over-does the end adjustment,
butting the grain further end ways than is desired, such excessive movement being
consequent on the long travel, necessary to bring the grain down the deck, being too
much for the end adjustment.
The next part of my invention consists in giving the "buttor" board such move-
ment that it shall have the full length of stroke necessary for bringing the grain
downwards to the knotter, but only a fraction of, or say one half, such stroke
endways of the grain.
In order to accomplish this object, according to one method of construction
instead of using the before-mentioned fixed arm e as shown in Figs. 1 and 2 for
connecting the "buttor" to the crank, I make use of an arrangement as shown in

page_text: Figs. 3 and 4 in which the up and down movement is communicated to the "buttor"
by means of a jointed arm or connecting rod & driven by the ordinary crank d,
while the in and out movement is obtained by means of another connecting rod d
driven by the crank & having its crank pin or point of connection midway between
that of the ordinary crank and the centre of the crank-shaft. This same short-
throw crank pin is also available for actuating the rod c which controls the motion
of the forward ends of the links a¹ a², as described in the first part of this
invention.
9
"
According to another method of giving the long up-and-down and the short
in-and-out movement to the "buttor," I make use of an arrangement shown in
Figs. 5 and 6 in which the "buttor" crank bas only sufficient throw for giving
the short in-and-out movement, and in order to give the longer stroke for the
up-and-down movement I make use of a sway beam or rocking lever which is
centred on the crank pin f¹ and has one end jointed to the fixed "buttor arm g¹
and the other end held or controlled by a rod or link g which is jointed to some
convenient place on the elevator front g³ so that by holding the outer end of the
rocking lever the inner end of the same is compelled to make a stroke of double
the length of that which is imparted to the rocking lever by the crank, and
consequently give the long up-and-down movement to the buttor," while the
in-and-out movement is only such as is due to the actual throw of the "buttor"
crank. Or in place of the rod or link the lever g may be controlled by means
of a pin or friction roller, moving to and fro in a vertical slot. In either case, the
crank pin which carries the rocking lever is also available for actuating the rod e
which controls the forward ends of the previously described links, giving them one
half the movement which the rocking lever imparts in an up-and-down direction to
the "buttor."
The next part of this invention relates to the manner of applying an automatic
tension to the twine, so that it may be released when the needle is at rest, and come
into operation as each sheaf is being bound. At a convenient position on the
binder frame I mount a bracket t Figs. 7 and 8 having two string eyes or
guides t¹ and t, one on either side, and having a tension clamp or lever u placed
between the string eyes t¹ and t2, the clamp being jointed to the bracket at t and
adjustable thereto by means of a thumb screw and spring t; the twine v being
passed through the string eyes and under the clanıp on its passage from the twine
box to the needle & in the ordinary manner.
In order to effect the object of this part of the invention 1 form the tension
clamp u with an arm or lever u¹ in such a position that just as the needle comes to
rest at the end of its return stroke this arm u¹ is caught by a projecting tooth wo¹
formed upon the needle shaft crank arm w, by which means the tension clamp u is
lifted from the twine and kept in that position during the period the needle is at
rest; thereby allowing the twine to pay out freely while the grain is being packed
into the binding receptacle and the sheaf is forming. Immediately on sufficient
grain being packed to form a sheaf and the needle commencing its forward travel
the tooth won the needle crank recedes from the arm u¹ of the tension clamp u,
thereby allowing the clamp to come into operation and press on the twine more or
less, according as the spring may have been previously adjusted; the pressure
continuing during the time the sheaf is being bound and until the needle again
returns to its position of rest.
As a modification of this arrangement see Fig. 74, the action of the tension
clamp u may be controlled by means of a rod and lever us or other equivalent
contrivance, actuated by a cam u or tooth, formed on the boss of the wheel which
drives the knotter shaft. This cam u may be formed so as to release the tension
immediately the sheaf is bound; or at any other suitable period during the travel
of the needle, in addition to that at which the needle is at rest.
According to a further modification, the tension clamp is placed at the back of
the binding apparatus, and actuated by a cam or crank on the back end of the
needle shaft.

page_text: 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
1. In sheaf binding harvesters, the manner of supporting and controlling the
movement of the lower end of the vibrating buttor, by means of the jointed links
the connecting rod, the short throw crank and the arrangement as shown and
described.
2. In sheaf binding harvesters, imparting to a vibrating buttor a differential
motion, that is to say, a long up and down movement and a short in and out
movement.
3. In sheaf binding harvesters, imparting to the vibrating buttor a differential
motion, in combination with the manner of supporting and controlling the move-
ment of the lower end as shown and described.
4. In sheaf binding harvesters, the arrangement for releasing the tension on the
binder twine substantially as shown and described.
Dated this 23rd day of June 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.