IMPROVEMENTS IN OR APPLICABLE TO JACK FRAMES AND INTERMEDIATE FRAMES
Year: 1878

page_text: LETTERS PATENT to Benjamin Walter Scott, of Levenshulme, near Manchester,
in the County of Lancaster, Millwright, for the Invention of "IMPROVEMENTS
IN OR APPLICABLE TO JACK FRAMES AND INTERMEDIATE FRAMES."
PROVISIONAL SPECIFICATION left by the said Benjamin Walter Scott at
the Office of the Commissioners of Patents on the 6th April 1878.
BENJAMIN WALTER SCOTT, of Levenshulme, near Manchester, in the County of
Lancaster, Millwright. "IMPROVEMENTS IN OR APPLICABLE TO JACK FRAMES AND
INTERMEDIATE FRAMES."
This Invention relates to an arrangement of mechanism for preventing the
operative tampering with the change motion of jack and intermediate frames by
winding back the rack, so as to put more laps upon the bobbins than they are
intended to bear; and, further, to the use and application of suitable locking
mechanism, which acts as a tell-tale if more than one extra lap has been so
put on.
Now this Invention consists of a ratchet wheel mounted upon the change motion
spindle, in which gears a pawl which can only become disengaged at the instant
that the rack has traversed its full distance, when it is released, and so permits the
rack to be wound back to the starting point, when such pawl instantly re-engages
with the ratches wheel. The change motion spindle also carries a toothed pinion
gearing with a spur wheel, the upper surface of which is provided with two pins,
which enter into a concentric slot formed in a disc plate mounted above and con-
centrically with such spur wheel. This disc plate on its upper surface also carries a
pin, which alternately comes in contact with one or the other of two arms, each
connected to a locking bolt, and so withdraws such bolt from locking contact with
a sliding bar, the extremity of which is arranged to lock into an extension of the
ston rod.

page_text: The pawl herein-before mentioned is connected to the sliding bar, which being
thus released by the action of the locking bolt so pushes such pawl in or out of
gear with the ratchet wheel, and which can only happen at the instant that the
rack has traversed its full distance, as herein-before mentioned.
One of the two arms before mentioned is provided with a suitable finger, which
in case of more than one extra lap being put upon the bobbins engages with a bell-
crank lever, and so causes a pawl upon the same to lock into the ratchet wheel, and
prevent the machine becoming started again without the overlooker's knowledge.
The mechanism constituting this Invention is all enclosed within a box under
lock and key.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Benjamin Walter Scott in the Great Seal Patent Office on the
5th October 1878.
BENJAMIN WALTER SCOTT, of Levenshulme, near Manchester, in the County of
Lancaster. "IMPROVEMENTS IN OR APPLICABLE TO JACK FRAMES AND INTERMEDIATE
FRAMES."
This Invention relates to an arrangement of mechanism for preventing the
operative tampering with the change motion of jack and intermediate frames by
winding back the rack, so as to put more laps upon the bobbins than they are
intended to bear; and, further, to the use and application of suitable locking
mechanisin, which acts as a tell-tale if more than one extra lap has been so
put on.
Now this Invention consists of a ratchet wheel inounted upon the change motion
spindle, in which gears a pawl or catch which can only become disengaged at the
instant that the rack has traversed its full distance, when it is released, and so
permits the rack to be wound back to the starting point, when such pawl or catch
instantly re-engages with the ratchet wheel. The change motion spindle also carries
a toothed pinion gearing through an intermediate wheel with a spur wheel, the
upper surface of which is provided with two pins, which enter into a concentric
slot formed in a disc plate mounted above and concentrically with such spur wheel.
This disc plate on its upper surface also carries a pin, which alternately comes in
contact with one or the other of two arms each connected to a locking bolt, and so
withdraws such bolt from locking contact with a sliding bar, the extremity of which
latter is arranged to lock into an extension of the stop rod.
The pawl or catch herein-before mentioned is connected to the sliding bar, which
being thus released by the action of the locking bolt so pushes such pawl or catch
in or out of gear with the ratchet wheel, and which can only happen at the instant
that the rack has traversed its full distance, as herein-before mentioned.
One of the two arms before mentioned is provided with a suitable finger, which
in case of more than one extra lap being put upon the bobbins engages with the

page_text: pawi or caten, and by releasing one sime
wheel, and so prevents the machine being started again without the overlooker's
knowledge.
The mechanism constituting this Invention is all enclosed within a box under
lock and key.
And in order that this my said Invention may be more clearly understood, and
more readily carried into effect, I have hereunto annexed a Sheet of Drawings illus-
trative of the same, and will now proceed to describe my Invention, reference being
had to such Drawing, and to the letters of reference marked thereon.
Fig. 1 is a back elevation of so much of the stop and changing mechanism of a
jack frame of "Hetherington's" construction as will show the application of my
improvements thereto.
Fig. 2 is a front view, with the cover removed, of the box and mechanism cou-
tained therein for effecting the purposes of this Invention.
Fig. 3 is a vertical side section of Fig. 2 on the line a-b.
Figs. 4 and 5 are views similar to Fig. 1, shewing the mechanism in various stages
of its action.
Fig. 6 is a front view of the box, with cover removed, shewing an improved
arrangement of mechanism for stopping the jack or intermediate frame when the
'copping beam" is at the middle of its traverse.
"
Fig. 7 is a front elevation of a positive motion for driving the upright spindle
which actuates the rack.
Fig. 1 is drawn to a scale of about one inch to the foot, the remaining Figs. about
half size.
Referring to Fig. 1, A is the vertical spindle carrying the pinion A', barrel A²,
and hand wheel A³ for actuating the rack A in the well-known manner. The box
B, seen in Fig. 1, which contains the mechanism for effecting the purposses of this
Invention, is crected in front of the horizontal spindle, which by means of the well-
known intermittent action drives the vertical spindle A at each change. An
extension of this horizontal spindle is carried into the box B, and is marked C in
Fig. 3. This spindle C has a ratchet wheel Caffixed upon it, controlled by a
pawl or catch C pressed into gear with it by the spring C³, and a spur wheel C is
also affixed upon the same spindle, and gears through an idle wheel C with a spur
wheel C, mounted upon the stud C7 affixed to the box B, as illustrated more
clearly in Fig. 3. D is a cam plate driven by the spur whool C³ upon the spindle
C, and carries or has formed upon it a cam D. E is a lever working upon the
stud E' fixed to the box B, which follows the cam D₁ under the pull of the strong
spring EF is a sliding bolt working in the fixing F' affixed to the back of the
box B, and which has a tendency to shoot to the right or left under the tension of
a band spring F² fixed to the lever E controlled, as before described, by the
cam DI
The sliding bolt F is alternately held to the extreme right or left by two latches
G and H, mounted upon the levers G and H, and pulled upwards by springs G
and H, suitable notches G³ and H³ being formed to receive the extremity of such
latches in the bolt F.
Upon the latch G I mount a finger I, which passes in front of the bolt F, and
engages with a slide J (a plan view of this slide is secu in Fig. 2a) connected to the
catch C. K is a pin upon the sliding bolt F, which at the proper time strikes
the finger I, and by pushing such finger and consequently the slide J before it
overcomes the spring C, and draws the catch C out of gear with the ratchet wheel
C; L is a sliding bar passing through the top of the box B, and jointed to one arm
of the tumbler lever L' (see Fig. 1), working in conjunction with the rack A* and
stop-rod S in the well-known manner.
In Fig. 2 the mechanism is shewn in the position which the parts occupy when a
frame has just been doffed, and prepared for starting. As the operative draws back
the stop-rod S in the act of setting on the frame, he draws up the sliding bar L, and

page_text: the same remains up, being held by the latch M of the stop motion in the well-
known manner.
It will be observed that as the catch C2 lies in contact with the ratchet wheel 0¹
it allows such ratchet wheel to slip as each successive change takes place, but the
catch effectually prevents the operative winding back the rack A' in order to get
more weight on to the bobbins. As the ratchet wheel C¹ thus slips under the
catch C at each change, the cam plate D revolves also in the direction of the arrow,
drawing away the cam D' from the lever E, and allowing the spring E³ to exert its
full strength through the band spring F upon the bolt F to shoot it to the right.
A stud N affixed to the face of this cam plate D (which at the commencement lies
in contact with the lever H, as seen in Fig. 2) is also brought round by such cam
plate, the wheels being so timed that the stud N arrives in contact with the lever
G' at or about the last rise and fall of the "copping beam." The position of the
parts at this time is shewn in Fig. 4. The further advance of the stud N depresses
the latch G, thus allowing the bolt F to shoot to the right until it rests against the
flat part of the raised bar L, there being sufficient freedom between the pin K and
the finger I to permit of this lateral movement without moving the slide J. This
action, it will thus be seen, is only preparatory, and takes place at or about the
last rise and fall of the "copping beam." The next change put into the rack A
knocks off the tumbler lever L, causing the sliding bar L to drop to the bottom of
the box B, and bringing the notch L² on such bar opposite to the sliding bolt F.
The bolt F, thus set free, immediately shoots into such notch the pin K carrying
with it the finger I and slide J, thus drawing back the catch C² out of gear with
the ratchet wheel C¹; at this instant also the latch H slips into gear with the notch
H³ formed in the sliding bolt F. The relative positions of the several parts of the
mechanism at this time is illustrated in Fig. 5.
During the whole of the time the catch C is in gear with the wheel C¹ it is
impossible for the operative to tamper with the change motion, in order to put more
laps on his bobbins, the catch C being thrown out of gear at the time of dolling
only. As the operative turns back the hand wheel A³ in the act of re-adjusting the
change mechanism, the cam D¹ and cam plate D are moved back to the position
seen in Fig. 2 and act upon the lever E, overcoming the spring E, and by bending
the band spring F gives the bolt Fa tendency to shoot to the left at the instant
that the stud N depresses the lever G', thus setting the bolt F free to shoot to the
left, and allowing the catch C to drop into gear again with the teeth of the ratchet
wheel C¹, and the latch G to rise and enter the notch G formed in the bolt F, as
the re-adjustment of the changing motion is completed. As the frame is re-started
the sliding bar L is again drawn up, and the mechanism is in the position seen
in Fig. 2.
From the foregoing it will be sufficiently apparent that the only way in which
the operative could put any extra lap upon the bobbins would be by propping up
the sliding bar L, so as to prevent it falling at the proper time. To prevent this is
the object of the finger I. Now as the sliding bolt F drives the slide J, this finger
I, it will be obvious that any extra lap put on to the bobbins by propping up the
sliding bar L would cause such finger to be drawn down by the onward movement
of the stud N, so that when the operator removed the prop, and allowed the sliding
bar to fall, the bolt would shoot into the notch L² as herein-before described, but
the finger I would be drawn down too far to actuate the slide J, and consequently
the catch C would fail to be drawn out of gear. The mechanism is thus locked,
and the operative cannot again start the frame until the overlooker has unlocked
the box and re-adjusted the mechanism, and thus the apparatus act as an efficient
tell-tale of over-winding.
In Fig. 6 is illustrated my improved device for stopping jack or intermediate
frames at the middle of the traverse of the copping rail, which is very desirable.
The mechanism here shewn may be enclosed in the same box as that previously
described, but for the sake of clearness is illustrated separately. Upon the edge of
the cam plate D I form a recess or notch, and I arrange a lever O, centered upon a

page_text: rocking stud at O¹ through a foot piece O³, to rest upon the periphery of such cam
plato. Whilst resting upon the edge proper of the cam D, the lever O is held up in
the position indicated by the dotted lines, and in that position is out of the way of
the poker P, which has a reciprocating motion imparted to it by being connected
eccentrically to one of the shafts of the counter-balancing mechanism of the copping
rail, so that as such copping rail rises and falls it imparts a to-and-fro motion to the
poker P. At or about the last rise and fall of the copping rail, the foot piece 02
falls into the notch in the cam plate D, and the lever O thus falls into the line of
thrust of the poker P, which advancing pushes such lover before it and withdraws
the latch which supports the sliding bar L, thus stopping the frame. The
liberation of this latch is timed to take place just when the copping rail is in the
middle of its traverse, as seen by the position of the counter-balance lever and
weight T in Fig. 1, which is the most convenient position to doff; as the sliding bar
L falls, a pin U strikes a tail picce U', projecting from the lever O, and throws such
lever clear of both the poker and cam, as indicated by the dotted lines.
Fig. 7 illustrates my improved positive notion for driving the upright spindle
which actuates the rack. A cam R centered at R' receives motion from the chang-
ing rod R. A bowl R³ lying upon this cam receives motion therefrom at each
change, and which is imparted to the ratchet wheel R' by the ratchet R³, a check
ratchet Re being provided to prevent the wheel running back. By connecting the
ratchet Re, by the rod R', to the sliding plate J, the ratchet wheel C₁ and catch C
may be dispensed with. With this modification, when the slide J strikes, tho check
ratchet Ro would be pushed out of gear, in turn pushing the driving ratchet R³ out
of gear, so sotting free the ratchet wheel R to allow it to be turned back, as
described in relation to ratchet wheel C¹.
»
Although I have only shewn the application of my Invention to a " Hetherington
jack frame, it will be readily apparent that the same is applicable, with slight
modification, to other constructions of jack and intermediate frames.
Having thus particularly described and ascertained the nature of this my said
Invention, together with the best methods with which I am acquainted for
carrying the same into practical effect, I wish it to be distinctly understood that
I do not confine myself to the precise details, relative proportions, or dimensions
of the several parts of the apparatus herein-before described, and illustrated on the
accompanying Drawing, as the same may be considerably varied without departing
from the Invention; but what I claim is,―
The combination and arrangement of mechanism substantially as and for the pur-
poses herein-before described, and illustrated on the accompanying Drawing, or
any mere modification of the saine.
In witness whereof, I, the said Benjamin Walter Scott, have hereunto set
my hand and seal, this Third day of October, in the year of our Lord
One thousand eight hundred and seventy-eight.