Improvements in Machinery for Winding, Doubling, and Twisting Yarn.
Year: 1886

page_text: Date of Application, 29th Apr., 1886
Complete Left, 28th Jan., 1887.
Complete Accepted, 1st Mar., 1887
Improvements in Machinery for Winding, Doubling, and
Twisting Yarn.
I, JOHN BOYD, of Shettleston Iron Works, Shettleston, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of this Invention to be as
follows, that is to say
My said Invention relates to machinery of the kinds described in my earlier Patent
Specifications, Numbered 2986 of 1872, 790 and 4241 of 1877, and 2404 of 1878, and
comprises improved modifications of detector stop-motions and other parts of such
machinery; and, as in the case of my earlier Inventions my present improvements or
some of them are applicable to machinery arranged or used for single winding by
drums, or for double or inultiple winding by drums, or for double or multiple twisting
combined with winding. In describing my present improvements reference will
hereinafter be made, for convenience and for the sake of clearly defining my improve--
ments, to parts of my earlier Specifications describing devices which have led to or
developed into the devices comprised in my present Invention.
In my Specification No. 4241 of 1877, certain detectors are described as wires
hanging on the yarns or threads and carried on a swinging plate on which is a catch
holding up the front weighted arm of a lever. When a yarn or thread breaks or fails
the corresponding detector wire drops in the way of a rotating wiper shaft which then
through the wire moves the swinging plate so as to release the lever arm, and the
lever arm in descending pushes the swinging plate so as to take its detector wires
clear off the wiper shaft, the practical advantage of which action is now well under-
stood. When the lever arm is released as described the other arm of the lever or a
piece rigidly fixed to it lifts the bobbin slightly upwards, and, thereby preventing
the drum from acting on its under side, stops the winding action. In the same
Specification there is also described a compact arrangement of detector mechanism, of
which a large number have been made both for doubling-winding, and for twisting
machines, and of which all the details for one set of ends, comprising the holder of the
detectors and catch, the combined catch and bobbin-lifting lever, working in concert
with the holder, are carried by a small bracket bolted to a longitudinal rail of the
framing.
According to my present Invention cach detector wire is made with an S-shaped or
double bend serving not only to limit its vertical movements but also by acting in
combination with a covering plate and without touching any other part preventing it
from turning in the holder; in which the several detector wires of a set are held by
the covering plate which is of thin metal and is secured by two rivets on one of which
it can turn whilst it engages under the head of the other rivet when it is closed.

page_text: One modification of my improved detector mechanism is applicable to drum winding
machines such as are described in my Specification No. 2986 of 1872 in which a
horizontal longitudinal shaft is placed centrally and has fixed to it a number of drums
or winding pulleys, each drum acting on two winding hobbins placed one on each side
of the machine. Each bobbin is carried by a bobbin holder consisting as usual of a
pair of connected arms; and there is at cacli side of the machine a rotating or rocking
wiper shaft for acting on detector stop-motion details. The bobbin holder which is
made with curved projections at its inner top corners, for conveniently lifting it by, is
centered on a pair of lugs projecting up from a small bracket which can be bolted to a
longitudinal rail of the framing, and these lugs have one or more projections on the
inner parts of their tops to sustain the bobbin holder in the absence of a bobbin when
lying down or inwards, and they are also formed so as in conjunction with the front
cross bar of the bobbin holder to sustain that holder without the aid of a prop, when it
is required to lift the bobbin away from the drum. When this improved form of
bracket is used for doubling-winding machines, it is formed with a forward projecting
part on which is suspended over the wiper shaft the combined detector holder and
catch, the catch being formed on its inner side, and having the front weighted arm of
a lever resting on it. This lever arm is rigidly fixed by a pinching screw on the
spindle forming the axle of the bobbin holder; and the lever is made with an inner
arm for lifting and braking the bobbin being constructed to extend in as closely as
possible to the touching point of the bobbin when in contact with the drum. Instead
of the lever having its front arm sufficiently weighted for lifting the bobbin, a spring
may be applied in any convenient way to act in the same direction. A small setting
on or starting lever is fixed on the spindle forming the axle of the bobbin holder and
to which the lever is rigidly fixed, and by slightly pressing inwards this starting lever
when the bobbin is resting on the brake lever the winding action is started and the
detector mechanisin put into working position. In some cases the simple dropping of
the bobbin on the brake lever will be sufficient for arranging the detector mechanism
and starting the winding action. The weighted lever may be formed with a part
extending forward under the wiper shaft as described in my Specification No. 4241 of
1877, for starting the action by, instead of the small lever hereinbefore mentioned.
The improved combination of bobbin holder and bracket with the provisions for
sustaining the bobbin holder in its inward and lifted positions without a prop can be
used in single-winding machines; and the improved combination of the bobbin-holder,
the lifting lever, and the detector holder can be used without carrying all the parts on
the same bracket.
Instead of centering the lifting lever with the same axis as the bobbin holder it may
be carried by separate lugs on the carrying bracket so as to have its centre nearer to
the winding drum, and under the bobbin holder and bobbin this arrangement giving
increased leverage to the front arm so that it will not require to be so heavy for the
purpose of lifting the bobbin with its holder. The front projecting part of the
carrying bracket is made with a covered or box like part under which is the front end
of the lifting lever with the catch formed on it for engaging with the swinging
detector holder which is suspended from the said projecting part. In this modification,
also, if the bobbin is allowed to descend quickly on the inner end of the lifting lever
the winding action will be started; but in cases in which it is desired to start the
winding action more gently an arm is extended upwards from the front arm of the
lifting lever by which the parts can be moved into working position as slowly as may
be wished.
Instead of the bobbin holder being centered on fixed parts projecting up from the
carrying bracket it may be centered at the upper ends of a pair of links or short arms
which are centered on the carrying bracket at their lower ends. In one modification
the pair of links or arms are formed in one piece with a forwardly projecting part
having at its front end the catch which engages with the catch of the swinging
detector holder, and when the catch is released the pair of links or arins turn outwards
and the bobbin holder moves with them drawing the bobbin outwards from the
winding drum.
A stationary brake piece as described in my Specification No. 2986

page_text: of 1872 and formed on the carrying bracket projects inwards nearly to the working
position of contact of the bobbin and winding drum, and when the bobbin holder
moves forwards the bobbin rolls upon the stationary brake piece so as to be no longer
acted on by the drum. The bobbin holder is afterwards turned up and outwards and
is then sustained by a catch lever jointed to the carrying bracket and provided for the
purpose and which is released by hand when the bobbin holder is again moved into its
working position. In another modification instead of the part having the catch being
fixed to the pair of links or arms it is jointed to them, and its front catching end
engages with a part of the box like bracket on which the swinging detector holder is
suspended. And the detector holder instead of being formed with a catch is fitted
with a projecting part which when the detector holder is made to swing by the wiper
shaft acts on the catch piece jointed to the pair of links or arms, and releases it
whereupon it moves forwards along the cover and the bobbin holder also moves
forwards and takes the bobbin out of contact from the drum. And the detector
holder, in this case, instead of being pushed away from the wiper shaft, moves away
by its own weight; and is put back into its working position by the weight of the
catch piece when the bobbin holder and its pair of holding arms are moved inwards to
put the bobbin into contact with the drum.
In all the modifications of my improved detector mechanism in which the detector
holder is made with a catch engaging with a catch of the lifting lever or of the pair
of links or arms, the catching parts are formed and arranged so as when engaged to
be relatively to the axis of suspension of the swinging detector holder in such a
position to the other parts that there is no strain tending to move the detector holder
out of position and no separate stop is required to insure its taking or keeping its
position.
Any of the modifications of my improved detector mechanism may be fitted upon a
very narrow double-sided winding machine, having a single central drum shaft, with
a longitudinal rail on each side for the detector mechanism and with a wiper shaft on
each side. The two wiper shafts have to be driven oppositely to each other; and
I effect this with belts and without any crossing of them by driving one of the wiper
shafts by an endless belt passing round it and round a pulley on a fixed stud, whilst
another endless belt passes in contact with the first one on the stud pulley and so
drives it, this second belt being one transmitting motion from a pulley on the drum
shaft to a pulley on the other wiper shaft and also to the pulley which works the
traverse motion mechanism. These pulleys and belts are all arranged in a boxed-in
space at one of the end frames of the machine and are thereby protected and guarded.
The yarns to be wound or doubled may be drawn off cops or bobbins, and when
cops are used the cop skewers are held in wood sockets in a low rail, the yarn passing
from them upwards through clearer guide plates, over drag blocks, through the
detectors, thence up and over very light pulleys or runners, and finally down through
traversing guide eyes to the bobbins, the arrangements being such as are described
and claimed in one or other of my carlier Specifications. When drawing the yarn off
bobbins, however, I prefer to adopt an improved arrangement, in which each bobbin is
held by a spring or springs on the upper part of a free spindle held in an inclined
position with its lower end in an inclined socket. The spindle has bearings at the
bottom and top of the socket, and at a short distance below the top of the socket a
small block of wood or other suitable material is pressed inwards through an opening
in the upper side to apply friction to the spindle so as to give the yarn a suitable
tension. A groove is turned in the spindle for the friction block to act in, and the
block by engaging in the groove keeps the spindle from rising out of the socket. The
friction block is pressed on by a small lever on which a weight can be adjusted.
The socket is filled nearly to the top with lubricating oil, a lip being formed at the
opening for the friction block to prevent the oil from overflowing.
EDMUND HUNT,
Applicant's Agent.

page_text: Twisting Yarn.
I, JOHN BOYD, of Shettleston Iron Works, in the County of Lanark, North Britain,
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, that is to say :-
My said Invention relates to machinery of the kinds described in my earlier Patent
Specifications, Numbered 2986 of 1872, 790 and 4241, of 1877, and 2404 of 1878,
and comprises improved modifications of detector stop-motions and other parts of such
machinery and as in the case of my earlier Inventions my present improvements or
some of them are applicable to machinery arranged or used for single winding by
drums, or for double or multiple winding by drums, or for double or multiple twisting
combined with winding. In describing my present improvements reference will
hereinafter be made, for convenience and for the sake of clearly defining my
improvements, to parts of my earlier Specifications describing devices which have led
to or developed into the devices comprised in my present Invention.
Four sheets of explanatory drawings are hereunto appended to be hereinafter
referred to in describing my present improvements. Figure, 1; on sheet, 1, is a
transverse vertical section of a doubling drum winding machine as made with one
modification of my improved devices. Figures, 2, and 3, are an enlarged section and
an enlarged plan corresponding to part of figure, 1; and figures, 4, and 5, are similar
views of a second modification. Figures, 6, 7, and 8, sheet, 3, are enlarged views of
the detector holder or carrier. Figures, 9, and 10, are a section and plan of a third
modification; and figure, 11; is a section showing the bobbin holders in certain
positions as hereinafter explained. Figures, 12, and 13, sheet, 4, are a section and
plan of a fourth modification; and figures, 14, and 15, are a section and elevation of
an improved device for holding and pacing the bobbins off which the yarns to be
wound are drawn. In these drawings the same reference numerals are used to mark
the same or like parts wherever they are repeated.
In my Specification No. 4241, of 1877, certain detectors are described as wires, 20,
(the reference numerals here given being those used to mark the corresponding parts
in the drawings accompanying my present Specification) hanging on the yarns or
threads, 21, and carried on a swinging plate, 22, on which is a catch, 23, holding up
the front weighted arm, 24, of a lever. When a yarn or thread breaks or fails the
corresponding detector wire, 20, drops in the way of a rotating wiper shaft, 25, which
then through the wire moves the swinging plate, 22, so as to release the lever arm, 24;
and the lever arm in descending pushes the swinging plate so as to take its detector
wires clear of the wiper shaft, the practical advantage of which action is now well
understood. When the lever arm, 24, is released as described, the other arm, 26, of

page_text: the lever or a piece rigidly fixed to it lifts the bobbin, 27, slightly upwards, and,
thereby preventing the drum, 28, from acting on its under side, stops the winding
action. In the same Specification there is also described a compact arrangement of
detector mechanism, of which a large number have been made both for doubling-
winding and for twisting machines, and of which all the details for one set of ends,
comprising the holder, 22, of the detectors, 20, and catch, 23, the combined catch and
bobbin-lifting lever, 24, 26, working in concert with the holder, are carried by a
small bracket, 29, bolted to a longitudinal rail, 30, of the framing.
According to my present Invention each detector wire, 20, is made with an
S-shaped or double bend, as shown in figure, 8, this bend serving not only to limit
its vertical movements, but also by acting in combination with a covering plate, 3.1,
and without touching any other part, preventing it from turning in the holder, 22.
The several detector wires of a set lie in notches in upper and lower projections or
ribs formed on the holder, 22, and are held there by the covering plate, 31, which is
of thin metal and is secured by two rivets on one of which it can turn whilst it
engages under the head of the other when it is closed. The cover plate, 31, is shown
closed in figure, 6, and open in figure, S, whilst figure, 7, is a vertical section as at
right angles to figures, 6, and 8.
One modification of my improved detector mechanism is applicable to drum
winding machines such as are described in my Specification No. 2986 of 1872, in
which a horizontal longitudinal shaft, 32, is placed centrally and has fixed to it a
number of drums, or winding pulleys, 28, each drum acting on two winding
bobbins, 27, placed one on each side of the machine. Each bobbin, 27, is carried by
a bobbin holder, 33, consisting as usual of a pair of connected arms, and there is at
each side of the machine a rotating (or it might be a rocking) wiper shaft, 25, for
acting on detector stop-motion details. The bobbin holder, 33, which is made with
curved projections, 34, at its inner top corners, for conveniently lifting it by, is centered
on a pair of lugs, 35, projecting up from a small bracket, 29, which can be bolted to a
longitudinal rail, 30, of the framing, and these lugs, 35, have one or more projections, 36,
on the inner parts of their tops to sustain the bobbin holder, 33, in the absence of a
bobbin when lying down or inwards, and they are also formed so as in conjunction
with the front cross bar, 37, of the bobbin holder, to sustain that holder without the
aid of a prop when it is required to turn over the bobbin holder, 33, away from the
drum, 28, as shown at the right-hand side of figure, 11. When this improved form of
bracket, 29, is used, as shown in the drawings, for doubling-winding machines, it is
formed with a forward projecting part, 38, on which is suspended, over the wiper
shaft, 25, the combined detector holder, 22, and catch, 23, the catch being formed on
its inner side, and having the front weighted arm, 24, of a lever resting on it. This
lever arm, 24, is, in the modifications shown in figures, 9, and 10, rigidly fixed. by a
pinching screw on the spindle forming the axle of the bobbin holder, 33, and the
lever is made with an inner arm, 26, for lifting and braking the bobbin, 27, being
constructed to extend in as closely as possible to the touching point of the bobbin
when in contact with the drum, 28. Instead of the lever having its front arm, 24,
sufficiently weighted for lifting the bobbin, a spring, 39, as indicated by dotted lines
in figure, 9, may be applied, in any convenient way to act in the same direction. A
small setting-on or starting lever may be fixed on the spindle forming the axle of the
bobbin holder, 33, and to which the fever, 24, 26, is rigidly fixed, or a handle, 40, as
indicated by dotted lines in figure, 9, may be formed on the forward arm, 24, of the
lever and by slightly moving the starting lever or the handle, 40, when the bobbin, 27,
is resting on the brake lever arm, 26, the winding action is started and the detector
mechanism put into working position. In some cases the simple dropping of the
bobbin, 27, on the brake lever arm; 26, will be sufficient for arranging the detector
mechanism and starting the winding action. The handle, 40, extends forward under
the wiper shaft, 25, like the corresponding part described in my Specification No. 4241
of 1877. The improved combination of bobbin holder and bracket with the provisions
for sustaining the bobbin holder in its inward and lifted positions without a prop as
herein before described can be used in single-winding machines; and the improved

page_text: combination of the bobbin holder, the lifting lever, and the detector holder can be used
without carrying all the parts on the same bracket.
Instead of centering the lifting lever, 24, 26, with the same axis as the bobbin
holder, 33, (as shown in figures, 9, and, 10,) it may be carried, as shown in figures, 1, 2, 3,
by separate lugs, 41, on the carrying bracket, 29, so as to liave its centre nearer to the
winding drum, 28, and under the bobbin holder and bobbin, this arrangement giving
increased leverage to the front arm, 24, so that it will not require to be so heavy for
the purpose of lifting the bobbin with its holder. The front projecting part, 38, of
the carrying bracket, 29, is made with a covered or box like part, 42, under which
is the front end, 24, of the lifting lever with the catch, 43, formed on it for engaging
with the catch, 23, of the swinging detector holder, 22, which is suspended from the
said projecting part, 38. In this modification, also, if the bobbin, 27, is allowed to
descend quickly on the inner end, 26, of the lifting lever the winding action will be
started; but in cases in which it is desired to start the winding action more gently an
arm, 44, is extended upwards from the front arm, 24, of the lifting lever, by which
the parts can be moved into working position as slowly as may be wished.
Instead of the bobbin holder, 33, being centered on fixed parts (35, as shown in
figures, 1, 2, 3, 9, 10, 11, and hereinbefore described) projecting up from the carrying
bracket, 29, it may be centered at the upper ends of a pair of links, or short arms, 45,
which are centered on the carrying bracket at their lower ends. In one modification,
shown in figures, 4, and 5, the two links or arms, 45, are formed in one piece with a
forwardly projecting part, 46, having at its front end the catch, 48, which engages
with the catch, 23, of the swinging detector holder, 22, and when the catches are
released, the pair of links or arms, 45, turn outwards as shown at the right-hand side
of figures, 4, and 5, and the bobbin, 33, moves with them drawing the bobbin, 27,
outwards from the winding drum, 28. A stationary brake piece, 47, (as described in
my Specification No. 2986 of 1872, and) formed on the carrying bracket, 29, projects
inwards nearly to the working position of contact of the bobbin, 27, and winding
drum, 28, and when the bobbin holder, 33, moves forwards, the bobbin, 27, rolls on to
the stationary brake piece, 47, so as to be no longer acted on by the drum. When
the bobbin holder, 33, has to be turned up and outwards for the purpose of piccing, it
is sustained by a catch lever, 48, jointed to the carrying bracket, 29, and provided for
the purpose and which is released by hand when the bobbin holder, 33, is again to be
moved into its working position. In another modification, shown in figures, 12, and 13,
instead of the part, 46, having the catch, 43, being fixed to the pair of links or arms, 45;
it is jointed to them, and its front catching end, 43, engages with a part of the box
like bracket, 38, 42, on which the swinging detector holder, 22, is suspended. And
the detector holder, 22, instead of being formed with a catch is provided with a
projecting part, 49, which when the detector holder is made to swing by the wiper
shaft, 25, acts on the catch piece, 46, jointed to the pair of links or arms, 45, and
releases it, whereupon it moves forwards along the cover, 42, and the bobbin holder, 33,
also moves forwards, and takes the bobbin, 27, out of contact from the drum, 28. And
the detector holder, 22, in this case instead of being pushed away from the wiper
shaft, 25, moves by its own weight; and is put back into its working position by the
weight of the catch piece, 46, acting on the projection, 49, when the bobbin holder, 33,
and its pair of holding arms, 45, are moved inwards to put the bobbin, 27, into
contact with the drum, 28. The links or arms, 45, are formed with heels at the
bottoms of their inner sides to prevent them from turning too far inwards.
In all the modifications of my improved detector mechanism in which the detector
holder, 22, is made with a catch, 23, engaging with a catch, 43, of the lifting
lever, 24, 26, or of the pair of links or arms, 45, the catching parts are formed and
arranged so as when engaged, to be relatively to the axis of suspension of the swinging
detector holder, 22, in such a position to the other parts that there is no strain tending
to move the detector holder out of position, and no separate stop is required to insure
its taking or keeping its position. Thus the downward pressure of the front weighted
end, 24, of the lever, is applied to the detector holder, 22, so as to act quite or almost
in a vertical direction down from the axis of suspension of the detector holder upon

page_text: its catching part, 23, which is below that axis; and with this arrangement combined
with the shapes of the catching parts there is no tendency to swing the detector holder
outwards or inwards whilst the catching parts are engaged.
Any of the modifications of my improved detector mechanism may be fitted upon a
very narrow double-sided winding machine, having a single central drum shaft, 32,
with a longitudinal rail, 30, on each side for the detector mechanism, and with a wiper
shaft, 25, on each side. The two wiper shafts, 25, have to be driven oppositely to cach
other; and I effect this with belts and without any crossing of them, in a manner
indicated by dotted lines in figure, 1. The wiper shafts, 25, have pulleys, 51, 52, and
one, 51, is driven by an endless belt, 53, passing round it and round a pulley, 54, on a
fixed stud, whilst another endless belt, 55, passes in contact with the first one, 53, on
the stud pulley, 54, and so drives it, this second belt, 55, being one transmitting
motion from a pulley on the drum shaft, 32, to the pulley, 52, on the other wiper
shaft, 25; and also to the pulley, 56, which works the traverse motion mechanism.
Theso pulleys and belts are all arranged in a boxed-in space at one of the end frames
of the machine and are thereby protected and guarded.
The yarns to be wound or doubled may be drawn off cops or bobbins, and when
cops are used the cop skewers, 57, (figure 1) are held in wood sockets in a low rail, 58,
the yarn passing from them upwards (through clearer guide plates if desired) over
drag blocks, 59, through the detectors, 20, thence up and over very light pulleys or
runners, 60, and finally down through traversing guide eyes, 6.1, to the bobbins, 27,
the arrangements being such as are described and claimed in one or other of my
earlier Specifications. When drawing the yarn off bobbins however, I prefer to adopt
an improved arrangement, shown in figures, 1, 14, and 15, in which each bobbin, 62,
is held by a spring or springs on the upper part of a free spindle, 63, held, by
preference as shown in figure, 1, in an inclined position with its lower end in an
inclined socket, 64. The same construction may also be adopted with a vertical
spindle and socket, as shown in figures, 14, and 15. The spindle, 63, has bearings at
the bottom and top of the socket, 64, and at a short distance below the top of the
socket a small block, 65, of wood or other suitable material is pressed inwards through
an opening in the side to apply friction to the spindle so as to give the yarn a suitable
tension. A groove is turned in the spindle, 63, for the friction block, 65, to act in,
and the block by engaging in the groove keeps the spindle from rising out of the
socket, 64. The friction block, 65, is pressed on by a small lever, 66, on which a
weight can be adjusted, the lever being centered on the socket casting, 64. The
socket, 64, is filled nearly to the top with lubricating oil, a lip, 67, being formed at
the opening for the friction block, 65, and in the inclined arrangement serving to
retain more oil without overflowing.
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 mode of limiting the movements of the detector wires in their holder by
making each with an S-shaped or double bend arranged so as to be guided by the
inside of the covering plate and thereby preventing the wire from turning, substantially
as hereinbefore described.
2 The improved construction, in combination, of the bobbin holder and bobbin-
holder brackets or lugs arranged to sustain the bobbin holder in both its inward and
outward positions substantially as shown in figures, 1, 2, 3, 9, 10, 11, of the
accompanying drawings, and hereinbefore described.
3-The improved construction of the carrying bracket, 29, with parts to carry the
bobbin holder, the swinging detector holder with catch, and the bobbin-lifting lever
centered on the bobbin-holder spindle substantially as shown in figures, 9, 10, of the
accompanying drawings and hereinbefore described.
4-The improved mode of constructing and arranging or combining together the
bobbin holder, the swinging detector holder with catch, the bobbin-lifting lever and
the parts carrying them substantially as shown in figures, 9, 10, of the accompanying

page_text: drawings, and hereinbefore described, whether the said carrying parts are formed on
one or more pieces or brackets.
5 The improved construction of the carrying bracket, 29, with parts to carry the
bobbin holder, the swinging detector holder with catch, and the bobbin-lifting lever
centered on separate lugs under the bobbin holder and bobbin, substantially as shown
in figures, 1, 2, 3, of the accompanying drawings, and herein before described.
6 The improved mode of constructing and arranging or combining the bobbin
holder, the swinging detector holder with catch, the bobbin-lifting lever and parts
carrying them, substantially as shown in figures, 1, 2, 3, of the accompanying
drawings and hereinbefore described, whether the said carrying parts are formed on
one or more pieces or brackets.
7-The improved mode of constructing and arranging or combining the bobbin
holder, the movable links or arms with a forwardly projecting catch piece, the swinging
detector holder with catch, the catch lever and the stationary brake piece, all fitted on
one bracket, substantially as shown in figures, 4, 5, of the accompanying drawings and
herein before described.
8 The improved mode of constructing and arranging or combining the bobbin
holder, the movable links or arms with a jointed catch piece, the swinging detector
holder with catch-lifting piece, and the stationary brake piece, substantially as shown
in figures, 12, 13, of the accompanying drawings, and herein before described, whether
fitted on one or more pieces or brackets.
9-Constructing and combining a swinging detector holder and the catching parts
by which it is held in working position so that the detector holder when released
moves by its own weight to take its detectors out of the way of the wiper shaft
substantially as shown in figures, 12, 13, of the accompanying drawings, and herein-
before described.
10 The improved mode of driving the wiper shafts by means of belts, and pulleys.
substantially as herein before described with reference to figure, 1, of the accompanying
drawings.
11 The improved bobbin holding apparatus hereinbefore described with reference
to figures, 1, 14, 15, of the accompanying drawings.
EDMUND HUNT,
Applicant's Agent.