Improvements in Stop Motions for Carding Machines.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Stop Motions for Carding Machines.
A communication by HENRY MCDERMOTT, of Norwich, in the County of New
London and State of Connecticut, United States of America, Mechanic.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6 Bank Street,
Manchester both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil 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 :-
This invention has for its object the production of simple mechanism for use
with ordinary carding machinery, by means of which the doffer-roll may be
automatically stopped upon the breaking of the sliver.
To this end the mechanism illustrated in the annexed drawings is provided,
Figures 1 and 2 being elevations of the two sides of a top-flat carding machine
embodying the hereinafter described invention.
Figure 3 is an elevation (considerably enlarged) of the condensing rolls and their
supporting frame, as viewed from the rear end of the machine.
Figure 4 is a view of the same from the left hand end with the journal bearing 37
removed, showing the parts that connect the condensing rolls with the doffer
driving gear in the positions which they occupy when the machine is in use.
In Figure 5 are illustrated the said connections as they appear when the stop-
motion has been brought into service to stop the doffer and feed-rolls, as fully
described hereinafter.
Figure 6 is a view of the condensing rolls and their supporting frame, similar to
Figure 4, and
Figure 7 is a rear side elevation of the cam 48 and the hanger in which it is
pivoted.
In these drawings the letter A indicates the carding machine as a whole; the
elements thereof that are shown as essential to this invention being the carding
cylinder 10, its shaft 11 and driving pulley 12, the feed roll 13, the doffer roll 14,
condensing rolls 15-16, licker-in roll 17 and driving mechanism for said elements.
18 denotes the main driving belt of the machine and 19 a belt by means of which
motion is transmitted from the card-cylinder shaft 11 to the pulley of the licker-in.
Upon the opposite end of the licker-in shaft is a pulley 20 which is connected by
a belt 21 with a large pulley 22 journalled on a stud secured to a lever 23 that is
fulcrumed on the machine frame at 24.
Secured to the inner face of pulley 22 is a gear 25 that meshes with and drives
the doffer-roll gear 26 when the lever 23 is elevated sufficiently to hold the
described gears in mesh. Upon the opposite end of the doffer-roll shaft is a bevel
gear 27 that meshes with and drives a similar gear secured to one end of a shaft 28
that extends along the side of the machine as best seen in Figure 2, and is
supported in stands 29. The rear end of shaft 28 bears a bevel gear 30 that
meshes with and drives a large bevel gear 31 secured to the end of the feed-roll 13.
It will thus be seen that motion is communicated by gears 25-26 to the doffer-roll
shaft and from said shaft to the feed-roll through the agency of the described
bevel-gears and shaft. The parts and arrangement of the same, thus far referred
to, are precisely the same as in carding machines now in common use.
32-33 and 34 indicate a train of small gears connected with the doffer gear 26,
the gear 34 being secured to the end of shaft 35 of the lower condensing roll 15.
This shaft 35 has a bearing in a stand 37 near the end that bears gear 34 and is
also supported in standards 38-39 upon each side of the roll 15. Journalled in

page_text: said standards immediately over roll 15 is a companion roll 16 whose shaft bears
upon one end a gear 16' that may mesh with a like gear 15' on the shaft 35 when
the condensing rolls are in contact as in Figure 6. When however the machine is
in service the sliver, passing between said rolls, as seen in Figure 3, forces the
upper one 16 upward thus disengaging the gear-teeth and causing the gear 161 to
revolve idly. Upon the opposite end of the shaft of roll 16 is a gear segment 40
(of approximately one eighth of a circle) whose teeth, when the condensing rolls
are in contact, may engage the teeth of a like segment 41 secured to a tube 42 on
the shaft 35 between the stands 37 and 38.
It should be understood that the lower roll 15 and its gear 15' are driven
positively by the shaft 35 and that the upper roll 16, when the machine is in
operation, is raised by the sliver until its gear 16' is drawn out of meshing contact
with the lower gear 15'. The principle office of gears 15 and 16¹ is to drive
positively the gear-segment 40 when the sliver stops rendering between the rolls.
A stop-screw 43 limits the movement of segment 41 in one direction, the normal
position of said segment being as in Figure 4. Upon the end of tube 42 nearest
the stand 37 is secured an arm 44 to whose free end is hinged a rod 45 that extends
downward and is connected with a lever 46 that is secured to a short shaft or
stud 47 journalled in the lower ends of hangers 48 attached fixedly to the main
frame of the machine. Fastened to shaft 47, between the described hangers, is a
cam 48 upon which rests the free end of the lever 23 which supports the pulley 22
and gear 25 already briefly described. When lever 23 is raised to throw the
gears 25-26, in mesh, the lever-arm 23 rests upon the highest point of the cam
and said lever is at a right angle, or nearly so, to a line drawn through the center of
the length of the cam, as shown in Figure 4 in full lines, but should the cam be
rocked slightly to one side, as in dotted lines in the last named figure, the weight
of the lever and its connected parts immediately force the cam downward to the
position shown in Figure 5. The lower end of the connecting rod or pitman 45 is
formed with a slot 45¹ of sufficient length to permit arm 46 to follow the movements
of the cam.
When it is desired to start a carding machine embodying the hereinafter
described invention, the handle of the cam-lever 46 is grasped and forced
downward. This movement causes the cam to force lever arm 23 upward, thus
throwing into mesh the gears 25 and 26 and starting the doffer-rolls and feed-roll
into action. So long as the sliver continues to pass uninterruptedly from the doffer
through the condensing rolls, the machine runs continuously but should the sliver
break and permit the upper condensing roll 16 to drop and thus bring into mesh
the gears 15-16 the segment 40, as it passes around, engages and moves the
segment 41 on tube 42 and rocks said tube and its connected arm 44 into the
position shown in Figure 6 and in dotted lines in Figure 4. Through the assistance
of the slotted pitman 45 the cam-lever is raised, the cam is rocked to release the
lever-arm 23, the gear 25 is thrown out of mesh with gear 26 and the doffer and
feed-rolls stop instantly. The tube 42 and its segment 41 then rock back to their
normal positions by reason of the excess of weight on that side upon which the
arm 44 and pitman 45 are hung, leaving the parts in the positions shown in
Figure 5. When it is desired to again start the machine it is only necessary to
press down the cam-lever 46 and thus raise the lever arm 23.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. In a carding machine, in combination with the doffer-roll, of a lever arm, a
cam for supporting the free end of said arm, condensing rolls adjacent to the
doffer rolls, segmental gears carried by said rolls and adapted to engage when the
sliver breaks, and connections between said gears and cam, whereby the cam is
operated upon the breaking of the sliver, substantially as set forth.
2. In combination with the doffer-roll of a carding machine, and driving

page_text: mechanism therefor consisting of a lever arm, a gear mounted upon said lever arm
as set forth, a cam for supporting said lever-arm in its operative position,
condensing rolls having gear segments adapted to engage each other only upon the
breaking of the sliver, and a slotted pitman connecting one of said gear segments
with the said cam, substantially as and for the purpose specified.
3. In combination with the doffer-roll, of a carding machine, a lever arm, a gear
mounted upon said lever arm, condensing rolls movable toward and from each other,
one of which is positively driven and its shaft is provided with a sleeve, a segmental
cam upon the sleeve, and a corresponding cam upon the shaft of the other roll, and
a pitman connecting said sleeve to the lever arm, substantially as set forth.
4. In combination with the doffer roll, of a carding machine, a lever arm, a gear
mounted upon said lever arm, condensing rolls movable toward and from each other,
one of which is positively driven and its shaft is provided with a sleeve, a segmental
gear wheel on the sleeve, an adjustable stop for engaging with said segmental gear,
a corresponding gear upon the other roll, and means for connecting said sleeve with
the lever arm, substantially as set forth.
lטו...נ..
T.1 1002
WM. P. THOMPSON & Co.,
Agents for the Applicant.