Improvements in the Method of and Means for Doffing Cops, Bobbins, or the like, in Spinning and like Machines.
Year: 1899

page_text: Date of Application, 25th Oct., 1899
Complete Specification Left, 7th June, 1900-Accepted, 28th July, 1900
Improvements in the Method of and Means for Doffing Cops, Bobbins,
or the like, in Spinning and like Machines.
I, JOHN MIDGLEY, of Lumbutts Mills, Langfield, Todmorden, in the County
of York, Manager, do hereby declare the nature of this invention to be as
follows:-
My said invention relates to improvements in the method of and means for
doffing cops in ring spinning and doubling frames and the like.
As is well known to those connected with the spinning industry when the
pirns or bobbins are filled, or the cops completed, such completed cops are
removed one by one by an attendant-known as a doffer-and empty bobbins
dropped on the spindles for the commencement of a fresh set of cops. This is
at best but a slow and expensive means of removing the completed cops and my
invention has for its object to provide mechanical means for simultaneously
doffing a line of cops and for inserting a line of empty bobbins on the spindles
from which the cops have been removed.
Under one arrangement for carrying my invention into effect with which I
have experimented I mount on the front of the frame a suitable shaft capable
of being revolved, or partially revolved, by a chain worked through worm gear
from a hand wheel suitably disposed say at the end of the frame.
This shaft may however be rotated by any other convenient form of gear.
Upon the said shaft I secure pendent arms or bars which are formed with rack
teeth throughout a part of their length such pendent arms or bars carrying
suitable brackets which are free to slide thereon. The slidable brackets sustain
two cross shafts one of which is provided with spur pinions gearing with the
rack teeth cut on the pendent arms the said shaft also carrying a handle, the
operation of which one way or the other, raises or lowers the brackets by reason
of the pinions gearing with the rack teeth.
This raising and lowering of the brackets may however be effected by any
other suitable form of gearing.
The second shaft supported by the bracket carries the spring or clips which
effect the lifting of the completed cops and also the brackets or sockets which
receive and carry the empty bobbins and is capable of endwise movement.
The springs or clips which take hold of and lift the completed cops are spaced
a certain distance apart on the second shaft according to the gauge of the spindles
such clips being of a double loop formation the first loop being large enough to
pass down over the fully wound cop whilst the second loop is small enough to
embrace and grip the base of the cop or the bobbin the outer ends of the clip
normally meeting each other. The brackets or sockets for the empty bobbins
are arranged on the shaft so as to break joint or be out of line with the springs
or clips.
To describe the action of the apparatus we will suppose the cops to he

page_text: ready for doffing and that the second shaft has been supplied with its full com-
plement of empty bobbins.
To effect doffing the operator first turns the hand wheel which through the gear
revolves the shaft carrying the pendent arms until such arms have moved through
say a semi-circle and are about vertical.
Upon this being effected the handle on the first cross shaft is operated so as
to lower the larger loops down around the cops and this lowering takes place
until the loops reach the base of the cop when the brackets and parts are allowed
to move slightly forward so that the smaller loop now springs over and embraces
the base of each bobbin or cop. With the springs gripping each bobbin the
handle is next operated so as to raise the bobbins clear of the spindles where-
upon the shaft carrying the springs &c. is slid endwise. By moving the shaft
endwise, the full bobbins are moved out of, and the empty bobbins brought
into, line with the spindles so that upon such shaft being turned the empty
bebbins may be next lowered upon the spindles such empty bobbins being re-
leased from their sockets on the forward movement or lowering of the cross
shafts and parts. With the empty bobbins in position a fresh set of cops may
be started the doffed cops being removed from the springs or clips and empties
inserted at leisure.
Before lifting the cops, and with the springs in position, I may slightly raise
the ring rail by the usual means so as to ease the bobbins on the spindles.
In cases where no bobbin is used and the yarn spun on the bare spindle the
brackets or sockets would be dispensed with.
Instead of employing one shaft for the lifting springs and the brackets or
sockets for the empty bobbins, I may have one shaft for the springs and another
for the brackets or sockets with suitable operating means and in this case it
might not be necessary to turn the cop or empty bobbin after or before the
same is removed from or placed on the spindle.
I do not confine myself in respect of details in the carrying of my invention
into effect.
.
By means of my invention cops are doffed in a much more expeditious and
economical manner than heretofore.
قييم
1000
E. K. DUTTON & Co.,
hartered Patent Agents, 5, John Dalton Street, Manchester.
Improvements in the Method of and Means for Doffing Cops, Bobbins,
or the like, in Spinning and like Machines.
I, JOHN MIDGLEY, of Lumbutts Mills, Langfield, Todmorden, in the County
of York, Manager, 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 and accompanying drawings:
My said invention relates to improvements in the method of and means for
doffing cops in ring spinning and doubling frames and the like.
As is well known to those connected with the spinning industry, when the
pirns or bobbins are filled, or the cops completed, such completed cops are re-
moved one by one by an attendant known as a doffer," and empty bobbins
dropped on the spindles for the commencement of a fresh set of cops. This is
at best, but a slow and expensive method of removing the completed cops and

page_text: my invention has for its object to provide mechanical means for simultaneously
doffing a line of cops and thereafter placing a line of empty bobbins on the
spindles from which the cops have been removed.
My said invention will be clearly understood from the following description
when read in conjunction with the annexed sheet of illustrative drawings, in
which:-
Fig. 1 is a diagramatic front view, of part of a ring spinning frame with my
invention applied thereto, only just so much of the frame being indicated as is
necessary for a clear comprehension of the invention.
Fig. 2 is a plan view of part of Fig. 1 taken on the line A B.
Fig. 3 is an end view, of the worm gear and parts, shown in Fig. 1.
Fig. 4 shows a sectional end elevation of Fig. 1.
Figs. 5 to 11 show detail views of various parts.
Under one arrangement for carrying my invention into effect which I havo
found suitable, I mount in a convenient position at the front of the framing. A,
a suitable shaft a, supported in bearings or brackets a¹, carried from fixed parts
of the frame. This shaft, is capable of being revolved, or partially revolved, by
means of a chain or the like b, one end of the chain being connected to a
pulley secured on the end of the shaft a. The other end of the chain b is
connected to a pulley 62, attached to or compounded with a worm-wheel e,
mounted on a stud c carried by the bracket c². Gearing with the worm-wheel c
is a worm & mounted on a spindle supported by the brackets the stud d¹
carrying a hand wheel the operation of which revolves the worm d and con-
sequently the worm-wheel c. Revolution of the worm-wheel c draws the chain b
from the pulley so that a partial revolution of the shaft takes place. The
shaft a is preferably provided with a counter-balance weight a² as shown in
Fig. 1. Instead of using a worm and worm-wheel the shaft a may be rotated
by any other convenient form of gear.
Upon the said shaft a I secure a suitable number of pendent arms or bars e,
which may be square or of other irregular form in cross-section, such pendent
arms or bars being cut with rack teeth throughout the greater part of their
length, as clearly indicated in Fig. 4.
The said pendent arms or bars e carry brackets f which are slidably arranged
thereon. These slidable brackets f, sustain two cross shafts g, h, the shaft g
being provided with spur pinions g gearing with larger pinions g² mounted on
studs carried by the brackets f, the said pinions gearing with the rack
teeth cut on the pendent arms or bars e. The shaft g also carries a handle g',
the operation of which one way or the other, raises or lowers the brackets f by
reason of the pinion g³ gearing with the rack teeth cut on the pendent arms or
bars. In order to lock the slidable brackets f in any desired position upon the
arms or bars e, I provide a spring pressed pawl which is normally forced into
engagement with one or the other of the pinions which effect the movement of
the brackets as above described. I may, if deemed necessary, employ more than
one pawl . To limit the downward movement of the bracket f. when the bars e
hang pendent, I employ suitable stops e as indicated in Figs. 1 and 4.
The second shaft h carried by the brackets f, is supported in bearings h¹,
formed on or attached to the brackets f, and is capable of endwise movement.
This second shaft carries springs or clips which effect the lifting of the
completed cops and also the clips or sockets k which receive and carry the empty
bobbins.
The springs or clips ; which take hold of and lift the completed cops are
spaced a certain distance apart on the second shaft h according to the gauge of
the spindles.
These clips are of a double loop formation, as clearly shown in Figs. 1 and 10,
the first loop j¹ being large enough to pass down over the fully wound cop (see
Fig. 7), whilst the second loop 2 is small enough to embrace and grip the base
of the cop or the bobbin (see Fig. 7b).

page_text: The sockets k for the empty bobbins are preferably formed from thin
spring clips or by bending a piece of sheet metal suitably punched or cut and
are arranged on the shaft h so as to break joint or be out of line with the
springs or clips j. Figs. 11 and 11ª shows separate side and plan views of one
of the sockets formed from sheet metal. Instead of using spring clips or
sheet metal sockets, brackets may be used into which the empty bobbins could
be readily slipped.
To describe the action of the mechanism I will suppose the cops to be ready
for doffing and that the second shaft has been supplied with its complement of
empty bobbins, the position of the shaft h and parts at this period being, say
as indicated in the detail sectional view Fig. 5.
With the whole line of bobbins in position, the shaft his revolved, and slid
endwise, so that a pin m on the shaft h enters a slot m¹ formed in the bracket h¹,
and the bobbins and parts then assume the position indicated in Fig. 6, the
shaft h being now locked and prevented from revolving. The endwise movement
of the shaft h, may be brought about by operating a handle h2 secured to a
boss formed with a screw thread or spiral ³, a pin h³ on the shaft / engaging
the spiral so that by operating the handle the requisite revolution and end-
wise movement of the shaft h results.
To effect doffing, the operator now turns the hand-wheel d³ which, through the
gear, revolves the shaft a carrying the pendent arms e, until such arms have
moved through say a semi-circle and are vertical or thereabouts, as indicated
in dotted lines, Fig. 4.
Upon this being done the handle on the first cross shaft g is operated, so
as to lower the larger loops of the clips down around the cops, and this
lowering takes place until the loops reach the base of the cop, see the dotted
lines Fig. 7, when the brackets are pulled or allowed to move slightly forward,
so that the smaller loop now springs over and embraces the base of each cop or
bobbin, see Fig. 7. With the springs gripping each bobbin the handle is next
operated so as to raise the bobbins clear of the spindles, see the full lines Fig. 7,
whereupon the shaft carrying the springs &c. is slid endwise. By moving the
shaft endwise, the full bobbins are moved out of, and the empty bobbins brought
into, line with the spindles as will be understood. The pendent arms e and
parts carrying the cross shafts are then allowed to move slightly forward to allow
clearance from the frame for the full bobbins when the shaft his turned.
As soon as the turning of the shaft 7 is completed the parts are moved back
into position so that the empty bobbins may be next lowered on the spindles,
as indicated in Fig. 8. The movements of the parts are governed by the slot
formed in the hinged catch n shown in Fig. 9.
The empty bobbins having been lowered sufficiently far on the spindles are
released from their sockets on the forward movement or lowering of the cross
shafts and parts. I may lock the shaft h immediately after turning and before
the bobbins are lowered on the spindles, if thought desirable. With the empty
bobbins in position a fresh set of cops may be started the doffed cops being re-
moved from the springs or clips and empties inserted at leisure.
To hold and secure the pendent arms and parts when elevated I provide a
hinged catch pivotted at n¹ such catch being formed with a slot or opening to
engage a stud or the like o carried by the shaft a.
The slot may be of sufficient length to readily allow of a limited movement of
the shaft to facilitate the lowering and working of the clips and the catch n
may be backed up by a spring p so as to automatically engage the stud pas
the arms e are raised.
The construction of the catch n is indicated in Figs. 1 and 9.
Before lifting the cops, and with the springs in position, I may slightly raise
the ring rail, by the usual means, so as to ease the bobbins on the spindles.
In cases where no bobbin is used and the yarn spun on the bare spindle the
empty bobbin spring clips or sockets would be dispensed with.

page_text: Instead of employing one shaft for the lifting springs and the spring clips
or sockets for the empty bobbins, I may have one shaft for the springs and another
for the brackets or sockets, with suitable operating means, and in this case it
might not be necessary to turn the cop or empty bobbin after or before the same
is removed from or placed on the spindle.
I do not confine myself in respect of details in the carrying of my invention
into effect.
By means of my invention cops are doffed in a much more expeditious and
economical manner than heretofore.
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) In the doffing of cops in spinning machinery the provision of mechanical
means consisting of a revolvable shaft operated by gearing and provided with a
number of bars or arms carrying slidable brackets and having cross shafts for
operating and carrying the parts which effect the lifting of the cops and sus-
tain the empty bobbins, in the manner, and substantially as herein described.
2) In apparatus for doffing cops, the use of sliding Brackets carrying a cross
shaft furnished with springs or clips to engage the cops and-where bobbins are
used with sockets for the reception of empty bobbins, the said shaft having
endwise freedom of movement, substantially as herein described.
3) In apparatus for doffing cops, the employment of clips of a double loop
formation the clips being so formed and carried as that the larger loop shall
pass freely down over the fully wound cop whilst the smaller loop shall engage
and lift the cop, substantially as herein described.
4) The general arrangement, construction, and combination of parts, com-
prising the improved means for mechanically doffing cops in ring spinning and
like machines, substantially as herein described and shown.
Dated this 5th day of June 1900.
For the Applicant,
E. K. DUTTON & Co.,
Chartered Patent Agents,
5, John Dalton Street, Manchester, and 3, Yorkshire Street, Rochdale.