Improvements in "Traverse Motions" for the Sliver or Roving Guides used in Machinery for "Preparing" and Spinning Cotton and other Fibrous Materials.
Year: 1890

page_text: Date of Application, 14th Mar., 1890
Complete Specification Left, 15th Dec., 1890-Accepted, 21st Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in "Traverse Motions" for the Sliver or Roving
Guides used in Machinery for "Preparing" and Spinning Cotton
and other Fibrous Materials.
I, JOHN DODD, of Hartford Works, Oldham, in the County of Lancaster,
Machinist, do hereby declare the nature of this invention to be as follows:-
My invention relates to machinery for "preparing" and spinning cotton and
other fibrous materials and relates more particularly to arrangements of mechanism
for communicating motion to the guide rib or rod which carries the guides for the
slivers or rovings. By means of these guides the positions of the slivers or rovings
in relation to the "drawing" rollers are secured and determined.
The guide rib or rod having a to and fro motion end wise, the guides, as is well
understood will cause the slivers or rovings in their passage through the drawing
rollers to be slowly traversed across the face of the rollers in the same direction as
the guide rib or rod is moved. By this means the greater part of the surface of the
covering of the top rollers is successively and alternately brought into action for
drawing the sliver or roving which is passing through them. The more perfectly
this is done the longer the covering of the top rollers will last. When the guide rib
or rod arrives at the end of its traverse in either direction there is always a slight
dwell or stoppage of the traverse of the sliver or roving before it again begins to
follow the movement of the guide rib or rod. This stoppage of the traverse causes
a quicker deterioration of the surface of that part of the top roller at which the
stoppage takes place than at any other part of such roller.
The object of my invention is to cause the place in relation to the top roller at
which this change of direction or stoppage of the traverse of the sliver or roving
takes place to be constantly varied in order to reduce the wear and tear of the
surface of the top rollers.
The apparatus by means of which the motion is communicated to the guide rib or
rod is technically known as a traverse motion."
In the well-known imule traverse motion used by Platt Brothers and Company,
Limited, the face cam by which motion is imparted through a bell-crank-lever to
the guide rib or rod is mounted on and kept in position by a stud secured to a
suitable bracket. The before named stud permits the cam to be revolved on its
axis and keeps the cam always in the same horizontal plane. The connecting rod
which connects the before-named bell-crank-lever to the guide rib or rod is secured
by means of a stud to a bracket which is secured to the guide rib or rod.
t
By this means the bracket and guide rib or rod receive motion from the
traverse motion," the guide rib or rod and the connecting rod always retaining
substantially the same relative positions in regard to one another.
According to one of my improved arrangements I mount upon a stud secured to
the said bracket which is secured to the guide rib an excentric capable of being
rotated on the stud by means of a ratchet wheel which is secured to the excentric or by
means of equivalent mechanism. I cause the end of the before named connecting rod to
embrace the excentric so that the movement of the connecting rod will by means of
the excentric be communicated to the bracket and guide rib. I may provide the
bracket with a detent catch to compel the ratchet wheel to rotate in one direction
only. On a bracket conveniently placed and secured I mount a catch which is
capable of taking into and at times imparting motion to the teeth of the ratchet
wheel so that when the traverse motion causes the connecting rod and ratchet wheel

page_text: connected to it to move towards the catch, this movement will cause the teeth of the
ratchet wheel to be turned more or less by the action of the catch.
By these means at each traverse of the roving guide; a changing of the position
of the axis of the excentric in relation to the connecting rod will be secured, so that
the relative positions of the connecting rod and guide rib are continually changed
until the excentric has made one revolution when the same series of changes again
takes place.
Instead of the excentric a cam may be used by adapting the end of the connecting
rod to the cam.
The greater the throw or excentricity of the excentric or cam and the greater
will be the range of variations in relation to the surface of the roller at which the
change of traverse or "dwell" takes place.
It is obvious that the excentric or cam may be mounted on the bell-crank-lever
connected to the other end of the connecting rod; or the connecting rod may be
made in two parts and the excentric or cam placed between them so as to continually
lengthen and shorten the connecting rod.
According to a further part of my improvements I cause the before named face
cam to have a to and fro motion in the direction of its axis in addition to the
rotation round its axis that is to say it has a motion in the direction of its axis or
at right angles to the plane in which the cam revolves. By this means the relative
position of the guide rib or rod in relation to the drawing rollers is varied.
When the face cam is reciprocated in one direction the effect will be to cause the
guide rib or rod to be moved nearer to the said can and when the face cam is
reciprocated in the other direction the effect will be to cause the guide rib or rod to
be moved further from the said cam.
The greater the throw or excentricity of the excentric or cam by which the
reciprocating movement of the face cam is effected and the greater will be the range.
of variation in relation to the surface of the roller at which-the-change of "traverse'
ordwell" takes place--
I have only referred to the mule traverse motion as made by Platt Brothers-and
Company Limited, in order to illustrate my invention. The arrangements of this
apparatus are equally suitable for "preparing" machinery as well as for spinning
machinery. 1 would have it understood that my hereinbefore described improve-
inents may be used in conjunction with arrangements of "traverse motion " other
than the one hereinbefore referred to.
Dated this Thirteenth I of Manal 1000
COMPLETE SPECIFICATION.
Improvements in "Traverse Motions" for the Sliver or Roving
Guides used in Machinery for "Preparing" and Spinning Cotton
and other Fibrous Materials.
I, JOHN DODD, of Hartford Works, Oldham, in the County of Lancaster,
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 relates to machinery for "preparing" and spinning cotton and
other fibrous materials and relates more particularly to arrangements of mechanism
for communicating motion to the guide rib or rod which carries the guides for the
slivers or rovings. By means of these guides the positions of the slivers or rovings
in relation to the "drawing" rollers are secured and determined.
The guide rib or rod having a to and fro motion end wise, the guides, as is well
understood will cause the slivers or rovings in their passage through the drawing
rollers to be slowly traversed across the face of the rollers in the same direction as
the guide rib or rod is moved.
By this means the greater part of the surface of the covering of the top rollers

page_text: is successively and alternately brought into action for drawing the sliver or roving
which is passing through them. The more perfectly this is done the longer the
covering of the top rollers will last. When the guide rib or rod arrives at the end
of its traverse in either direction there is always a slight dwell" or stoppage of
the traverse of the sliver or roving before it again begins to follow the movement
of the guide rib or rod. This stoppage of the traverse causes a quicker deterioration
of the surface of that part of the top roller at which the stoppage takes place than
at any other part of such roller.
The object of my invention is to cause the place in relation to the top roller at
which this change of direction or stoppage of the traverse of the sliver or roving
takes place to be constantly varied in order to reduce the wear and tear of the
surface of the top rollers.
The apparatus by means of which the motion is communicated to the guide rib
or rod is technically known as a traverse motion."
In the well-known mule traverse motion used by Platt Brothers and Company
Limited the face cam by which motion is imparted through a bell-crank-lever to
the guide rib or rod is mounted on and kept in position by a stud secured to a
suitable bracket. The before named stud permits the cam to be revolved on its
axis and keeps the cam always in the same horizontal plane. The connecting rod
which connects the before named bell-crank-lever to the guide rib or rod is
secured by means of a stud to a bracket which is secured to the guide rib
or rod.
By this means the bracket and guide rib or rod receive motion from the "traverse
motion," the guide rib or rod and the connecting rod always retaining substantially
the same relative positions in regard to one another.
According to one of my improved arrangements I mount upon a stud secured to
the said bracket which is secured to the guide rib an excentric capable of being
rotated on the stud by means of a ratchet wheel which is secured to the excentric or
by means of equivalent mechanism. cause the end of the before named connecting
rod to embrace the excentric so that the movement of the connecting rod will by
means of the excentric be communicated to the bracket and guide rib.
I may
provide the bracket with a detent catch to compel the ratchet wheel to rotate in
one direction only. On a bracket conveniently placed and secured I mount a catch
which is capable of taking into and at times imparting motion to the teeth of the
ratchet wheel so that when the traverse motion causes the connecting rod and
ratchet wheel connected to it to move towards the catch, this movement will cause
the teeth of the ratchet wheel to be turned more or less by the action of the catch.
By these means at each traverse of the roving guide; a changing of the position of
the axis of the excentric in relation to the connecting rod will be secured, so that
the relative positions of the connecting rod and guide rib are continually changed
until the excentric has made one revolution when the same series of changes again
takes place.
Instead of the excentric a cam may be used by adapting the end of the connecting
rod to the cam.
The greater the throw or excentricity of the excentric or cam and the greater
will be the range of variations in relation to the surface of the roller at which the
change of traverse or "dwell" takes place.
It is obvious that the excentric or cam may be mounted on the bell-crank-lever
connected to the other end of the connecting rod; or the connecting rod may be
made in two parts and the excentric or cam placed between them so as to continually
lengthen and shorten the connecting rod.
According to a further part of my improvements I cause the before named face
cam to have a to and fro motion in the direction of its axis, in addition to the
rotation round its axis, that is to say it has a motion in the direction of its axis or
at right angles to the plane in which the cam revolves. By this means the relative
position of the guide rib or rod in relation to the drawing rollers is varied. When
the cam is reciprocated in one direction the effect will be to cause the guide rib or

page_text: rod to be moved nearer to the said cam and when the face cam is reciprocated in
the other direction the effect will be to cause the guide rib or rod to be moved
further from the said cam.
The greater the throw or excentricity of the excentric or cam by which the
reciprocating movement of the face cam is effected and the greater will be the
range of variation in relation to the surface of the roller at which the change of
" traverse or "dwell "takes place.
"
I have only referred to the mule traverse motion as made by Platt Brothers and
Company Limited, in order to illustrate my invention. The arrangements of this
apparatus are equally suitable for preparing machinery as well as for spinning
machinery. I would have it understood that my hereinbefore described improve-
ments may be used in conjunction with arrangements of traverse motion other than
the one herein before referred to.
In the accompanying drawings Figs. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 show
different ways in which my invention may be carried into effect.
Fig. 1 shows an elevation and Fig. 2 shows a plan of a traverse motion which
will serve to make one arrangement of my invention understood and partly serves
to make my other arrangements understood.
At (a) is shown the roller beam which carries the roller stand (6) by which the
rollers are supported. At (c) is the end of the back bottom roller provided at its
outer end with a worn (d) which is secured thereto. The roller stand (b) also
supports the guide ribs (e) to which are secured the roving guides (f) and the
bracket (f). The bracket (g) bolted to the framing (h) supports by means of the
stud (i), the worm wheel () which is free to revolve thereon but is prevented from
rising by the washer and nut (*). The worm wheel (j) is provided with a
cam (j).
The teeth of the worm wheel (j) gear into the worm (d) and receive motion
therefrom. The arm (g) of the bracket (a) by means of the stud (k), carries the
bell-crank-lever (1). One arm of the lever () is provided with an anti-friction
-bowl-(m)-through which the bell crank lever (4) receives motion from the cam (♬³).
The other arm () of the lever () is provided with a slot into which is secured an
adjustable stud (n). (o) is a connecting rod provided at one end with a slot (o¹)
through which passes the stud (n). The other end (0*) of the connecting rod (o) is
connected to and embraces an excentric (p) formed on the boss of the ratchet
wheel (p). The connecting rod (o) is provided with a projection (o) which carries
the adjusting screw (o). The end of the adjusting screw (o) is always kept in
contact with the stud (n) by the spring (1). The connecting rod (o) is also
provided with projections (0%) and (o) which take hold of a brake spring (1).
The excentric (p) is mounted upon à stud (p) which is secured in a slot in the
bracket (f). The ratchet (p) has a groove (p³) formed on its periphery. A
spring clip (p) embraces the groove (). The ends (p*) of the spring clip (p³)
being forced into the space formed between the projections (0°) and (0°) cause the
spring by its compression to grip the ratchet wheel (p) and so act as a break to
prevent its rotating too freely. The bracket (f) is provided with a stud (2) to
which is attached one end of the spring (3), the other end of the spring being
secured to a stud (1) on the beam bracket (a). The spring (3) tends to pull
the bracket (1) in the direction indicated by the arrow (1). Secured to the roller
beam (a) is a bracket (a2) provided with a slot into which is secured an adjustable
stud (a) which carries one end of a detent catch (a) provided with a projection (a)
which takes into the teeth of the ratchet wheel (¹). The bracket (1) slides in a
fork formed in the guide bracket (a) which is secured to the roller beam (a).
Figs. 3 and 4 show on a larger scale some of the parts shown in Figs. 1 and 2;
the same letters of reference refer to the same parts in each case.
The mode of operation is as follows
The rotation of the back roller (c) by means of the worm (d) and worm wheel (j)
causes the cam (j') to be rotated and will at times impart motion through the anti-
friction bowl (m) to the bell crank lever (1) in the direction shown by the arrow (2).

page_text: This movement of the bell crank lever (1) by means of the stud (n) and screw (0*)
will cause the connecting rod (o) to be moved in the direction indicated by the
arrow (3) and with it the bracket ('). This movement of the bracket (1) causes
the guide rib (e) and roving guide (f) to be moved in the direction indicated by
the arrow (3) thus causing the rovings to be traversed slowly across the face of
the rollers. The cam (¹) will gradually bring the highest part of its throw to act
upon the anti-friction bowl (m).
After the highest part of the cam (¹) has passed the anti-friction bowl (m),
the inclination of the cam will be in the opposite direction and instead of forcing
the lever () in the direction indicated by the arrow (2) it will now permit the
lever () to be moved in the opposite direction. The spring (f³) constantly tends
to move the bracket (¹) and connecting rod (o) in the direction indicated by the
arrow (4). The effect of this is to cause the anti-friction bowl (m) of the bell crank
lever (1) to be pressed against the face of the cam (¹) which permits the spring (ƒ³)
to move the guide rib (e) and roving guides (f) in the direction indicated by the
arrow (4). Thus the cam (j') positively imparts motion to the roving guides (ƒ)
in one direction and permissively regulates their motion in the other direction.
The movement of the guide rib (e) and bracket (f) in the direction indicated by
the arrow (4) will cause a tooth of the ratchet wheel (p¹) to come in contact with
the projection (a) on the detent catch (a). The further movement of the plate (¹)
which carries the stud (3) will cause the ratchet wheel (p) to be partially turned
on its axis in the direction indicated by the arrow (5). This movement of the
ratchet wheel (4) and excentric (p) produces a change in the position of the axis
of the excentric () in relation to the connecting rod (0), so that at each traverse of
the roving guide (f) a changing of the position of the axis of the excentric () in
relation to the connecting rod will be secured. Thus the relative position of the
connecting rod (0) and guide rib (e) is constantly changing until the excentric (p)
has made one revolution, when the same series of changes will again take place.
The greater the throw or excentricity of the excentric (p) and the greater will be
the range of variations, in relation to the surface of the roller, at which the change
of direction of traverse or dwell takes place. Thus each revolution of the cam (1)
whilst imparting a uniform amount of motion to the bell crank lever (!) and con-
necting rod (o), will cause the traverse to be reversed at a constantly changing
position in relation to the rollers.
Figs. 5 and 6 show a modification of some of the parts shown in Figs. 1, 2, 3, 4.
The ratchet wheel (pl) is provided with a cam (g). The part (93) of the connecting
rod is a modification of the connecting rod (o) shown in and described with reference
to Figs. 1, 2, 3, and 4. Mounted on the stud (4) is an anti-friction bowl (92). The
part (9) of the rod is provided with a slot through which passes a projection formed
upon the ratchet (1). When by means of the cam (¹) the rod (9³) is moved in the
direction indicated by the arrow (6) the anti-friction bowl (92) will be pressed against
the face of the cam (9) which forms a part of the ratchet wheel (') and by means of a
stud (2) which is secured to the plate (ƒ¹) the cam (1) will cause the plate (1)
to be moved in the direction indicated by the arrow (6). The rotation of the
cam () permits at times the spring (3) to draw the plate (1) in a direction
opposite to that indicated by the arrow (6) as already explained, with reference
to Figs. 1, 2, 3, and 4. This movement of the plate (^"') will cause a tooth of
the ratchet wheel (p¹) to come in contact with the projection (a') on the detent
catch (a) and so cause the ratchet wheel (p') to be partially turned on its axis
in the direction indicated by the arrow (5). Thus a change of the position of
the axis of the cam in relation to the connecting rod (o) will be secured and
the relative position of the connecting rod (o) and guide rib (e) will be continually
changing until the cam (4) has made one revolution, when the same series of
changes will again take place. A break spring such as (p) is to be applied to
the ratchet wheel (p') although such spring is not shown in Figs. 5 and 6 of
the drawings.
It will be obvious that by varying. the form of the, cam (g) a different. rate of

page_text: variation will be produced and by making the cam with more than one throw other
series of variations may be produced.
The slot in the part (1) of the lever (L) and the adjusting screw (01) in the con-
necting rod (o) are for the purpose of regulating and adjusting the guide rib (e) and
roving guides (f) to their proper positions in relation to the rollers and also to
adjust the amount of traverse required.
It is obvious that the ratchet wheel (p') and excentric (p) or the ratchet wheel (p')
and cam (9) may be mounted on the bell-crank-lever () to which one end of the
connecting rod (o) is attached. When so placed the effect would be just the same
as when placed as shown in Figs. 1, 2, 3, 4, 5, and 6 and the relative positions of
the lever () and guide rib (e) would be continually changing until the excentric (p)
or cam (9) had made one revolution, and substantially the same results would be
obtained as by the arrangement shown in Figs. 1, 2, 3, 4, 5, and 6.
According to another arrangement the connecting rod (0) may be made in two
parts and the ratchet wheel and excentric (p) or the ratchet wheel and cam (q) may be
mounted on one of the two parts of the connecting rod and connected to the other,
so as to continually lengthen and shorten the distance between the two ends of the
connecting rod.
Figs. 7 and 8 show so much of a traverse motion as is necessary to illustrate
another arrangement of my invention.
At (a) is shown the roller beam. (c) is a portion of the back bottom roller
provided at its outer end with the worm (d) which is secured thereto. The
bracket (2) bolted to the framing (h) is provided with a boss (*). The boss (*)
by means of the spindle (1) supports the worm wheel which is secured to such
spindle. The worm wheel () is provided with a cam
The teeth of the worm
wheel () gear into the worm (d) and receive motion therefrom. The arm (9) of
the bracket (2) by means of the stud (4) carries the bell-crank-lever (!). One arm
of the lever () is provided with an anti-friction bowl (m) through which the bell-
crank-lever (i) receives motion from the cam ("). The other arm (1) of the
lever ()-is provided-with-a-slot-into-which-is-secured_an_adjustable stud (n) to
which an ordinary traverse motion connecting rod is intended to be attached. The
cam () as already explained in the description of the first part of my invention
with reference to Figs. 1, 2, 3, and 4 positively imparts motion to the roving
guides () in one direction and permissively regulates their motion in the other
direction.
The lower end of the boss *) has formed upon it a bearing and shoulder (91)
which supports the wheel (95) which is mounted upon it. The wheel (g) has
formed upon the side which faces the internal wheel (9) a projection (g').
The centre of the bearing (g) is excentric to the centre of the spindle (1).
Mounted upon and secured to the lower end of the spindle (i) is an internal
wheel (g) which gears into the wheel (g) and is capable of imparting motion
thereto. The wheel () is provided with a face cam (9). The wheel (9) being
slightly larger than the wheel (g) will cause the wheel (9) to make a revolution
in less time than the wheel (g) and so constantly bring the projection (9) which is
in contact with the face of the cam (97) upon a different part of the cam (g). The
part (g) shows that part of the cam which has the greatest elevation and the
part (9) shows that part of the cam which has the least elevation.
As previously explained in the preceding description of other parts of my invention
the anti-friction bowl (m) is always pressed against the face of the cam (1)
consequently the spindle () and wheel (9) will have a constant tendency to be
forced in the direction indicated by the arrow (7). This upward pressure upon
the wheel (9) will cause its face cam (7) to press against the projection (g) on
the wheel (9). The shoulder (g) against which the wheel (9) revolves will
however prevent the wheel (9) from being pushed upwards by the wheel (y).
The mode of operation is as follows:-
The rotation of the back roller (c) by means of the worm (d) and worm wheel (j)
will cause the cam (¹) to be rotated and will at times impart motion through the

page_text: Thus after a
anti-friction bowl (m) to the bell-crank-lever (l) in the direction shown by the
arrow (8). Each revolution of the cam (") will impart a corresponding revolution
to the internal wheel () which in turn causes the wheel (y) to revolve, but
inasmuch as the wheel" (7") revolves at a slightly greater velocity than the
wheel () it will gradually bring the projection () in contact with a different
part of the face cam (9') in relation to its original position at the beginning of
each revolution. The face of the cam (7) is made sufficiently wide to permit of
the excentricity of the orbit of the projection (2) on its face.
sufficient number of revolutions of the cam (j') and wheel (7) the projection (gº)
instead of being opposite the part (*) as shown in Fig. 7, will arrive against the
least elevation (5) of the face cam (9) and during the time that this is taking place
the cam (), spindle () and wheel (y) will be moved in the direction indicated
by the arrow (7). The further rotation of the cam (1) will cause the projection (8)
gradually to ascend the face of the cam in the wheel (7) and during the time this
is taking place the cam (j') spindle (4) and wheel () will be forced downwards, that
is to say, in a direction opposite to that indicated by the arrow (7). This vertical
movement of the cam (1) will necessarily change the position occupied by the
anti-friction bowl (m) and the stud (n) at the time the change of direction of traverse
takes place. Thus during the period in which the cam (i) receives a vertical move-
ment in the direction indicated by the arrow (7) the position occupied by the anti-
friction bowl (m) and the stud (n) at the time the change of direction of the traverse
takes place will gradually be moved in the direction opposite to that indicated by
the arrow (8). When the action of the wheels (6) and (9) permits the cam (1),
spindle () and wheel (g) to be moved vertically in a direction opposite to that
indicated by the arrow (7) the position occupied by the anti-friction bowl (m) and
the stud (n) at the time the change of direction of traverse takes place will gradually
be moved in the direction indicated by the arrow (8).
In this arrangement the variation of position which causes the traverse to be
reversed at a constantly changing position in relation to the rollers, takes place in
the movement of the bell-crank lever (1) so that when the lever (!) is connected in
the ordinary manner with the guide rib (e) the variation imparted to the lever (2)
will be communicated by it to the guide rib (e) and the roving guides (f) as
previously explained.
It will be obvious that by varying the form of the face cam (7) a different rate
of variation will be produced and by making the cam with more than one throw,
other series of variations may be produced.
Figs. 9 and 10 show another arrangement of my invention. At (a) is the roller
beam. At (c) is a portion of the back bottom roller provided at its outer end
with the worm (d) which is secured thereto. The bracket (") which is bolted to
the framing (4) is provided with bearings (1) and (3) which support the spindle (2).
The spindle () at its upper end supports the worm wheel (j) which is secured to
to it. The worm wheel (j) is provided with a cam (j'). The teeth of the worm
wheel () gear into the worm (d) and receive motion therefrom. Secured to the
lower part of the spindle (7) is a worn (3) gearing into a worm wheel (4) which
is mounted upon the stud () which is secured to the bracket (). The bracket (r)
is also provided with an arm (7). The arm (7) by means of the stud (k) carries
the bell-crank-lever (l). One arm of the lever () is provided with an anti-
friction bowl (m) through which the bell-crank-lever (4) receives motion from the
cam (). The other arm (') of the lever (4) is provided with a slot into which
is secured an adjustable stud (n) to which an ordinary traverse motion connecting
rod is intended to be attached. The cam () as already explained in the first
part of my invention with reference to Figs. 1. 2. 3 and 4 positively imparts motion
to the roving guides () in one direction and permissively regulates their motion
in the other direction. The bracket (7) is mounted upon the bracket (r) upon
which it is free to slide; and is secured in position thereon by means of a bolt (1)
and slide block ("). The bracket (6) is capable of moving either in the direction

page_text: indicated by the arrow (9) or in the opposite direction. Secured to the worm
wheel (1) and revolving with it is the cam (8).
The face of this cam (8) is pressed against the bowl (°) which is mounted upon
the stud (s) secured to the bracket () so that when the cam (8) is rotated it
will cause the stud (*) and bracket (6) to be moved either in the direction
indicated by the arrow (9) or in the opposite direction, the character of the
motion being dependent upon the form of the cam (78). The worm (7) is provided
with a boss in which is formed a groove (*) into which fits and engages the
arm (1) formed upon the bracket (), so that when the bracket (6) moves either
in the direction indicated by the arrow (9) or in the opposite direction it
carries with it the spindle (*) and cam (¹).
The mode of operation is as follows:-
The rotation of the back roller (c) by means of the worm (d) and worm
wheel (5) will cause the cam (1) to be rotated and will at times impart motion
through the anti-friction bowl (m) to the bell-crank-lever (1) in the direction
shown by the arrow (10).
Each revolution of the cam (j') will impart a corresponding revolution to the
worm () which in turn causes the worn wheel () to revolve and with it the
cam (which will cause the bracket (1) to be moved either in the direction
indicated by the arrow (9) or in the contrary direction. The movement of the
bracket () in the direction opposite to that indicated by the arrow (9) will cause
the spindle (*) and cam (¹) to be forced downwards, that is to say in a direction
opposite to that indicated by the arrow (9). This vertical movement of the
cam (2) will necessarily change the position occupied by the anti-friction bowl (m)
and the stud (n), at the time the change of direction of traverse takes place. Thus
during the period in which the cam (¹) receives a vertical movement in a
direction opposite to that indicated by the arrow (9), the position occupied by the
anti-friction bowl (m) and the stud () at the time the change of direction of
the traverse takes place will-gradually be moved in the direction indicated by the
arrow (10). When the action of the cam () permits the cam (7) and spindle ()
to be moved vertically in the direction indicated by the arrow (9) the position
occupied by the anti-friction bowl (m) and the stud (n), at the time the change of
direction of traverse takes place, will gradually be moved in a direction opposite to
that indicated by the arrow (10). In this arrangement the variation of position which
causes the traverse to be reversed at a constantly changing position in relation to
the roller, takes place in the movement of the bell-crank-lever (1) itself, so that
when the lever (4) is connected in the ordinary manner with the guide rib (e) the
variation imparted to the lever (4) will be cominunicated by it to the guide rib (e)
and the roving guides () as previously explained. It will be obvious that by
varying the form of the cam (8) a different rate of variation will be produced
and by making the cam with more than one throw other series of variations may be
produced.
Fig. 11 shows partly in section so much of a traverse motion as is necessary to
illustrate another arrangement of my invention. At (c) is a portion of the back
bottom roller provided at its outer end with a worm (d) which is secured thereto.
The bracket (9) bolted to the framing (4), by means of the stud (i) supports the
worm wheel () which is free to revolve thereon, but is prevented from rising by
the washer and nut (*).
Mounted on the boss of the worm wheel (3) is the worm wheel (j³) free to
revolve and to slide laterally thereon. On the lower face of the worm wheel (³)
is a projection (^). Formed upon the upper surface of the worm wheel (³) is a
face cam (). The path of the cam (1) coincides with the circle described by the
projection (1) on the cam (2). On its lower face the worm wheel (³) is also
provided with a face cam (1) which acts upon the anti-friction bowl (m) and the
lever (1). The teeth of the worm wheels (3) and (3) gear into the worm (d) and
receive motion therefrom. The worm wheel (2) although the same diameter as

page_text: the worm wheel (") has a less number of teeth in it than the worm wheel (j³)
consequently the worm wheel (2) will have a slightly greater angular velocity
than the worm wheel (³) and so constantly brings the projection (*) which is in
contact with the cam face () of the worm wheel (3) upon a different part of the
face cam (). The part () which is opposite to the projection (j) shows that
part of the cam (³) which has the least elevation. As previously explained the
anti-friction bowl (m) is always pressed against the face of the cam which
operates it, consequently the cam (e) will have a constant tendency to be forced
in the direction indicated by the arrow (11). This upward pressure upon the
cam () will cause its upper face (j') to press against the projection (1) on the
worm wheel (2). The nut and washer (*) will however prevent the worm
wheel (2) from being pushed upwards by the worm wheel (³).
The mode of operation is as follows:-
The rotation of the back roller (c) by means of the worm (d) and worm wheels (³)
and (3) will cause the cam (j) to be rotated and will at times impart motion
through the anti-friction bowl (m) to the bell-crank-lever (7) in the direction shown
by the arrow (12). In consequence of the wheel (*) having a slightly greater
angular velocity than the worm wheel (3) it will gradually bring the projection ();")
in contact with a different part of the face cam (°) in relation to its original
position at the beginning of each revolution. Thus after a sufficient number of
revolutions of the cam (6) the projection (*) instead of being opposite the lowest
part of the face cam () as shown in Fig. 11 will arrive against the greatest
elevation of the cam (5), and during the time that this is taking place the cam (1º)
will be moved in a direction opposite to that indicated by the arrow (11). The
further rotation of the worm wheel (*) will cause the projection (1) gradually to
descend the face cam (*) and during the time this is taking place the cam (7) will
be forced upwards, that is to say, in the direction indicated by the arrow (11).
This vertical movement of the cam (*) will necessarily change the position occupied
by the antifriction bowl (m) and stud (n) at the time the change of direction of
traverse takes place. Thus during the period in which the cam (✓6) receives a
vertical movement in the direction indicated by the arrow (11) the position occupied
by the antifriction bowl (m) and the stud () at the time the change of direction
of traverse takes place will gradually be moved in a direction opposite to that
indicated by the arrow (12). When the action of the worm wheels (*) and (j')
permits the cam (*) to be moved vertically in a direction opposite to that indicated
by the arrow (11) the position occupied by the antifriction bowl (m) and the
stud (n) at the time the change of direction of traverse takes place will gradually
be moved in the direction indicated by the arrow (12). In this arrangement the
variation of position which causes the traverse to be reversed at a constantly
changing position in relation to the rollers, takes place in the position of the bell-
crank-lever (1), so that when the lever (!) is connected in the ordinary manner with
the guide rib the variation imparted to the lever will be communicated by it to the
guide rib (e) and roving guides as previously explained. It will be obvious that
by varying the form of the face cam (³) a different rate of variation will be
produced, and by making the face can with more than one throw other series of
variations may be produced.
In the foregoing description of my invention I have indicated that the cam
which operates on the bowl (m) is a cam which acts positively on the bowl (m) and
lever () in one direction only. The spring (3) forces it in the opposite direction.
I would have it understood that I do not confine myself to this arrangement as a
cam which operates on the bowl (m) and through it on the bell-crank-lever (1)
may be what is known as an internal cam, that is to say, a cam in which the
bowl (a) would work in an annular groove. Consequently one face of the cam
would cause the bowl (m) to be forced in a direction opposite to that indicated by
the arrow (1) as already described with reference to the cam (¹). The other face
of the cam acting on the opposite side of the bowl (m) would cause the bowl (m)
and bell-crank-lever (1) to be moved in the direction indicated by the arrow (1).
B

page_text: It will be obvious that motion may be imparted to the herein before described
arrangements of traverse motions from any other convenient place without departing
from the spirit of my invention.
I do not confine myself to the arrangements as described and illustrated as it
will be obvious that other modifications may be made without departing from the
spirit of my invention.
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. The application to traverse motions of an excentric such as (p) or of a
cam such as (g) for the purpose of varying the place at which, the change of
direction of traverse takes place in relation to the drawing rollers as hereinbefore
described and illustrated in and by the accompanying drawings.
2. The arrangement and construction of traverse motions in which the cam which
communicates the traversing movement to the roving guides has in addition to its
rotary motion a motion in a direction parallel to its axis imparted to it, for the
purposes and substantially as hereinbefore described and illustrated in-and by the
accompanying drawings.
Dated this Thirteenth day of December 1890.
W. T. CHEETHAM,
Manchester, Agent to the Applicant.