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Jan. 7, 1947.
‘
J, ROBINSON
2,413,728
COMPENSATOR
Original Filed June 26, 1942
i
I
16'
“12a /
33
34
INVENTOR ’
Jonas Robinson,
'BY'
ATTORNEYS
2,413,728
Patented Jan. 7, 1947
UNITED STATES PATENT OFFICE
2,413,728
COMPENSATOR
v
_ Jonas Robinson, Clarke Summit, Pa.
’ Original application June
26, 71942, Serial No.
448,527, now Patent No. 2,386,574, dated Octo
her 9,, 1945. Divided and this application De
cember 23, 1944, Serial No. 569,558
4 Claims. (01. 87-—14)
2
provision of automatically operable compensat~
‘ This invention relates to pattern-controlling
means and refers, more particularly, to means
connecting a jacquard with heddles, jacks, pick
ers or other thread-controlling elements of a loom
or'textile machine.
v
This application is a division of my co-pending
ing means interposed between the jacquard and
the elements operated thereby.
‘
'
Other objects of the present invention will be
come apparent in the course of the following
- speci?cation.
In accomplishing the objects of the present in
vention, it was found desirable to insert into the
26, 1942.
" ‘
line of each individual connecting string a metal
As iswell known, jacquards are utilized for
element or equalizer which speci?cally com en~
10
the selective operation of heddles carrying the
sates against shrinkage or stretch of the string
warp-threads in the case of a loom or the corre~
occasioned by humidity changes. ri‘he element
sponding' jacks or pickers in case of acurtain
is preferably located fairly close to therlower ex“
machine or Nottingham lace machine, to deter
tremity of the string, namely, close to the
mine the pattern of fabric produced on the loom
loom ,or machine and ‘is so shaped and placed in
patent application, Serial No. 448,527, ?led June
or machine.
For that purpose, the heddles or
jacks are all individually connected by a series of
strings or cords withthe lifters, hooks or needles
of the jacquard. The number of strings‘ is equal
to that of the heddles or jacks and is quite great.
The jacquard is mounted, of necessity, high above
the loom or machine frame, the length of the
such manner as to compensate for and absorb all
expansion and contraction of the string from its
upper extremity at the‘ jacquard to the pointof
contact, with the element. This may be accom—
plished by allowing the element to carry out a
movement which-is different from the movement
of the string actuated by the jacquard. The
strings or cords extending between the jacquard
string movement and said different movement
and the heddles or jacks being often from 20 to
of the element are so combined and/or correlated
25 feet.
that as soon as action is'transmitted by the jac
It was found that these very long strings and 25 quard, the element will be able to manipulate its
cords change in length with each change of the
jack or heddle in the required manner irrespec
weather and its accompanying change of mois
tive ‘of any extensions‘ or contractions of the
ture content in the atmosphere. This change of
length of string shows at its lower extremity
Thus‘, in accordance with the present invention,
which is the jack. A string may extend during 30 one continuous string, the length of which is con
dry weather to such an extent that the opera‘
stant and whose sole function is to exert a pull
tion of the jacquard will not result in the with
on the jack to an extent equal to the amount of
drawal of a jack or heddle, or a string may con‘
lift that the jacquard calls for, is replaced by a
tract during a period of great humidity so much
connection consisting of the top string, an equal35
that the jack or heddle will remain withdrawn
izer and the bottom string. The equalizer per
despite the operations of the jacquard. As the
forms the following two functions:
»
string.
string varies in length the jack moves fromyits ‘
regulated position either to‘ a position too far
forward in a dry atmosphere or too far back in
a moist atmosphere in relation to the spool thread.
In either case, it means a fault in the pattern
v
_
'
Firstly, it serves as a connecting link between
the top and the bottom strings and transforms
the lift of the jacquardinto the pull on the jack,
just as though there ‘were one continuous string.‘
Secondly, it is so constructed that automati~
of the lace. Constant attention and frequent
cally it can neutralize the eifect of humidity on
adjustments are necessary to prevent those faults.
the string, 1. e. the‘ change in the length of the
It is among the important objects of the present
45 top string, and thus still transmit to the jack‘ the
invention to control the effects of changes in
entire pull of the jacquard.
,
weather conditions on the expansion andnon
According to some of the preferred embodi
traction of jacquard harness strings and cords.
Another object is to provide’ acompensating
ments of the'inventive idea,‘th_e element, which
breaks up the continuity of the fabric string, may
device which will insure proper operation of the
have the form of a-‘plate, and may carry out a
heddles and jacks by a=jacquard irrespective of 50 pulling movement, as well as a swinging move
the contraction or extension ofthe connecting _
ment. The swinging movement may be produced
v
strings and cords.
-
'
~
by an external force and may be transmitted to
A‘further object is to eliminate the necessity
the jack or heddle; in that case the pulling move
for constant attention and frequent adjustments
ment is the one received by the elements from
55
of the jacquard connecting means through the
2,413,728
3
the string.
On the other hand, the swinging
movement may be caused by a guide forming a
part of the plate and may constitute a component
4
Thus each jack is controlled separately from
the jacquard by means of a pulling movement
of a string or harness.
of the string movement, while another compo~
nent is transmitted by the plate to the jack or
heddle; this construction may be used for vary
ing the lift of a jack or heddle and/or operat
In operation, bobbins l9 reciprocate in the
direction of the arrow 30 (Fig. 1) by being thrown
between the separated threads, whilethe bars
23 and 24 reciprocate in the direction of their
ing a jack or heddle from a plurality of jac
quards.
lengths.
There is one warp thread for each
gauge of the machine. The warp bar 23 moves
The portion of string below the equalizer, 10 all
of the warp threads 2| in unison and has a
while still being subject to changes in length
side motion to allow the bobbin [9 to pass on
through weather conditions, is soyshort that any
each side of the Warp threads forward and back
slight change in length due to weather changes
and around it to tie it and hold the spool threads
would be negligible and its effects would not be
in position as they are built up to form a pat
noticeable on the woven fabric.
15 tern.. The jack bar 26 carries out a reciproca
The invention will appear more clearly from
tory turning movement and moves the jacks 25
the followingdetailed description when taken
to the withdrawn position shown by broken lines
in connection with the accompanying drawing '
in Figures 1 and 7. At that ‘time some of the
showing, by way of example only, some of the
needles of the jacquard 16 are operated.
preferred embodiments of the inventive idea.
20
The function of the jacks is to hold certain
In the drawing:_
of the spool threads from the side motion. Those
Figure 1 is a diagrammatic side view illustrat
spool threads that are not held make the side
ing the use of pattern-controlling means which
motion, are picked up into position bya set of
are constructed in accordance with the present
points and tied to the warp, and in this manner
invention, in a Nottingham lace curtain ma 25 build
up the pattern motion by motion.
As already stated, in prior art the strings 28
Figure 2 is a partial top view along the line
chine.
'
2—2 of Figure 1.
-
-
'
_
were directly actuated by the jacquard needles,
which pulled-them taut. Therefore, when the
~
Figure 3 shows a compensating plate in side
jack bar 26 moved back to the normal position
indicated by full lines in the drawing, some
of the resilient jacks 25 were maintained in the
withdrawn broken-line position by their taut
strings 28, and remained out of engagement with
the threads 2i and 22 during the movement of
elevation,
Figure 4 is a perspective view of a somewhat
different compensating plate.
Figure 1 of the drawing illustrates diagram
matically a Nottingham lace curtain machine [5,
a jacquard l6 and a compensating or equalizing 35
the bars 23 and 213, until-the jacquard needles
deice I'l.
released the strings and the resilient jacks sprang
While Nottingham lace curtain machines are
back to their normal position.
7 ~
shown‘ in the drawing in conjunction with the
The pattern of a fabric depends upon the posi
tions of the jacks 25 in relation to the threads
compensating devices, such devices maybe con
veniently used with any other type of textile
machine, such as a loom or a curtain machine of
40
21 and 22, said positions being determined by
.
the needles of the jacquard l6 and the strings
The Nottingham lace curtain machine 15 is of
standard construction and is shown merely in
the form of a diagram in Figure l. The machine
comprises carriages l8 carrying disc-like bobbins
I9. Bobbins I9 carry tying threads 28 and are
separately, through the medium of a pattern
made of punched cards. Strings 28 may main
tain the jacks 25 in full lift position, or a half
lift position in which the tip of a jack is located
any type.
thrown between warp threads 2| and spool or
patterning threads 22. There is one bobbin for
every warp thread. Each bobbin I9 is ?at and
contained in a carriage; it travels through the‘
threads at right angles to the line of threads,
forward and back at each motion of the ma
chine, twisting around the threads and holding
them into a lace fabric‘.
Warp threads 2| ex
tend through uniformly spaced openings 'ofa
warp bar or guide bar 23 and form a background
of tightly held threads. Spool threads 22 extend
through similar openings of a spool bar or guide
'bar 26. There is a spool thread for each warp
thread. The bar 24 has a side motion which 0
allows each thread to be built up, motion by mo
tion, into a pattern. Jacks 25 are carried by a
jack bar 26 and are adapted to project between
a pair of warp and spool threads. The jacks con
sist of. steel wires arranged side by side across 65
the mahine, one jack for each warp thread; they
move through the threads from back to front.
The tips of the jacks are regulated in a straight
line directly behind the line ‘of spool threads.
28 operated thereby. Each jack is controlled
between the two bars.
i
The described operation of a Nottingham lace
curtain machine is well known and does not
constitute a part of the present invention which
is concerned with means transmitting the move
ment of the needles of a jacquard [6 through
the strings 2'8 for the purpose of maintaining
some of the jacks 25 in the withdrawn positions.
As already ‘stated, the strings between.v the
jacquard and the jacks may be as long as'f20 or
25 feet, while the full path, of movement of the 2
upper end of a jack for a full lift is about‘ one
inch. It is apparent that variations, in atmos
pherichumidity willcause the strings to contract
or expand.
The variation in the length is prob-_
ably ?ve-eighths of an inch during a change of
weather from complete saturation. of moisture
to complete dryness in the atmosphere. The
change ‘from day to day may be from one-eighth
to one-quarter of an inch.
If the strings con
tract too much,.they may prevent‘ the jacksv from
assuming their normal forward position, so that
the jacks will remain. in the half lift or full lift
positions despite ‘the release of the strings by the
Each jack 25 is provided with a curved portion 70
needles of the jacquard. On the other hand, if
21 to which an end of a string 28 is attached.
the strings expand too‘ much, a jack maybe
In prior art, ‘strings 28 extended over sley ‘bars
returned
to a half lift or forward position despite
directly to a jacquard l6, making a right angle
the movement of the corresponding needle of
turn at a point about two feet from the jack.
75 the jacquard to the full lift position. In either
£413,728
5.
event, the correct transmission of the pattern
from jacquard to cloth is prevented.
- In accordance with the present invention, the
expansion and contraction of the harness strings
is automatically compensated by a compensator
or equalizer ll (Figures 1, 2 and 3). The func
tion of the equalizer is to so control the length of
the strings that a straight ‘line of jackswill be
maintained in the same position in all condij
tions of weather changes. Thus the equalizer
separates the top and bottom strings.
The compensator Ill comprises a plurality of
thinmetal plates 33, the number of the plates
being equal‘ to that of the jacks. For example,
in. the case of a six-point machine; there are six
plates side by side for each inch across the ma
chine. Each plate 33 is attached by a separate
bottom string-28 to a separate jack 25, soas to
make a horizontal pull on the jack.- The plates
33 extend in vertical rows and are separated from
upon the size of the projections 41, and the
latter are so dimensioned, that when a plate 33
is in its lowermost position of rest, the tip 53 of
the bar 46 moves not far from the line 38 of Fig
ure 3 and in its extreme forward position is
situated beyond an extension of the line 553 but
at a distance from the edge 5!.
When a plate 33 is pulled upwardly, by a string
I28, the tip 53 of the bar will move in the vicinity
of the line 39 of Figure 3 and will strike the plate
33 at about the point 54 of the edge as, since
the edge to is further forward than the edge
5 l. The bar ill will swing the plate 33 and at ?rst
one edge of the plate 33 will engage the wall 35.
whereupon the plate 33 will be pressed in its
entirety against the wall 35. Obviously, the strinr
28 will be stretched taut during this movement
of the plate 33 and if, at that time the jack bar
26 swings‘ forward, the'string 28 willretain its
pack 25 in the withdrawn position.
eachother by partitions 35 which are attached
to a wall 3-5.
during which the bar All exerts its pressure
against the edge 50 of a plate 33 coincides ap
proximately with the time period during which
the corresponding needle of the jacquard H3
exerts its pulling force upon the string E28, these
time periods being su?icient to maintain the
jack 25 out of engagement with the threads 2i
and 22 during a back-and-iorth movement of the
forward edge of the plate 33, which ,faces the
machine It, consists of a vertical bottom portion
59 and an upper vertical portion 55 joined by a
horizontal portion 52, the plate being wider atv
-
_
bars 23 and 24.
Each plate 33 is connected at 3? by a separate
top string I28 with a separate actuating needle
stances cause an expansion or extension of the
(not shown) of the jacquard it. The strings I23
long string I28, then this string will be more slaclr
between the jacquard I5 and the plate
and
the plate 33 will hang lower. Then the point of
contact between the tip 53 of the bar 49 and the
edge 59 of the plate 33 in the full lift position
of the loom, such as heddles or dobbies; itis a
part of and controls each individual string and
each individual string must be equipped with
normal
of the plate
location
will be
54 shifted‘upwardly
and toward the from
edge 52.
However, so long as the tip 53 can strike the edge
_
59, the expansion of the string l23 will not in
?uence the action of the plate 33 upon the string
23 and the jack connected therewith.
If the string I28 is contracted by atmospheric
conditions, the plate 33 will move upwardlmbut
- It is thus apparent that according to the pres
ent invention, the single string of prior art con
structions is separated. close to the textile ma?
chine into two strings 23 and ma and a com
pensating plate is connected to both strings.
The jacquard needle exerts an upward pull
upon the string [238 and the plate 33 connected
therewith. When the string l28 is of normal
length, the extent of the upward movement of
the plate 33 is represented by the distance be
tween the lines 38 and 39 in Figure 3. As already
stated, this upward, movement of the string 523
and of the plate 33 is caused by a jacquard needle
when for pattern purposes the corresponding jack
25 should be retained in the rearward or lift
position.
The upward movement of a plate 33 is trans
mitted to the corresponding string 28 by an oscile
' latory
mechanism
comprising
an
elongated
shogging bar 40 which is carried by leversv 4i
mounted upon .a pivot 42.’ The levers M carry
cam followers 43 engaging cams ‘M which are
rotatable along with a driving shaft d5 and which
are provided with circular surfaces 45 and pro
jections él. Springs 48 maintain the cam fol~
'
g If atmospheric conditions or other circum
extend upwardly and are very long, While the
strings 28 are quite short and extend substan
tially horizontally. The plate 33 does not con
trol or come in contact with the machinery parts
one plate.
.
rotation are so selected that the time interval
The strings 28 are attached to ears
3.5 situated at the bottom of the plates 33. The
plates are located on the level with the jacks to
make a right angle turn in the strings. The
the bottom than at the top.
'
The position of the'ca-m M and the speed of its
its operation will not be a?ected so long as the tip
53 of the bar All can swing above the edge 52 in
the non-lifting position of the plate.
50
It is apparent that in accordance with the
present invention, the continuous length of
string, whose single function is to pull and hold
pulling
the jackunit
in composed
its position,
of the
hastop
been
string,
changed
the equal;
to
izer and the bottom string.
The equalizer compensates equally well either
in case of a gradual slow change in weather con»
ditions, or in case of a sudden violent change, and
maintains at all conditions of the weather the
same relative position of the jack at its point of
contact with the lace in the making.
_
Figure 4 showsa plate [33 which may be used
to maintain the jack connected thereto not only
in the non-lifting and full lift positions, but in"
the half lift position as well. - Forthat
urpose,
the front edge of the plate [33 has three vertical
lowers 43in engagement with the cams 45.
portions 56, 63 ‘and 6| and two horizontal pore
It is apparent that when a projection M en
tions 52 and 6:3. The jack remains in the non
gages the cam follower 43, the lever M is swung
toward the plate 33. As soon as theprojection 70 lifting forwardposition so long as the shogging
bar moves above the horizontal edge 64. The jack
4'! is moved’ beyond the cam follower, the spring
is maintained in a half lift position when the
138 pulls back the lever 4!, so that the lever 4!
plate is somewhat moved by the shogging bar
and the bar 40 connected therewith carry out
after the bar engages the edge 63. The jack is
an oscillatory or swinging movement.
The length of movement of the bar 4!] depends 75 maintained in its full lift position when the plate
2,413,728
is moved to its full extent by the shogging bar
which engages the edge 60 of the plate.
' It is apparent that the string I28 may expand
or contract within wide limits without interfer
ing with the action of the plate I33.
It was found that normal atmospheric varia
tions may cause a variation of up to one inch in
the length of a string I28, the operative extent
of which may range between 16 and 20 feet. The
plates 33 and I33 must be constructed so as to be
able to compensate for this variation.
It is apparent that the described equalizers are
designed so that they will work in connection
with the jacquard harness string automatically
and by gravity for the control of the weather con
ditions so far as they a?ect a lace machine or
other jacquard machines in the transferring of
the pattern from the jacquard to the woven
fabric.
The action of the equalizers is not on
some part of the machine or loom, such as heddles '
or dobbies, but is directly on the individual
strings, a?ecting only the strings themselves.
The equalizers are so designed and placed as to
neutralize the variations in length of the long
top strings occasioned by the changes in relative
8.
2. In a device connecting a pulling element of
a jacquard with a thread-actuating element of a,
textile machine, an elongated connecting element
having one end connected to said pulling element,
another connecting element having one end con—
nected to said thread-actuating element, a plate
connected to the two connecting elements and
so located in relation thereto that a raising and
lowering of said pulling element is transmitted
10 by the ?rst-mentioned connecting element to said
plate but is not transformed into a, pulling move
ment of the second-mentioned connecting ele
ment, and means reciprocating in a direction
substantially transverse to the direction of the
raising and lowering of said plate and engaging
said plate when it is in the raised position to
move the raised plate along with the second-men
tioned connecting element, whereby the second-'
mentioned connecting element carries out a pull
ing movement, said means being adapted to en
gage said plate in a plurality of places to com
pensate for an extension or contraction of the
?rst-mentioned connecting element.
3. A device for compensating for the extension
and contraction of an elongated connecting ele
humidity; they do not have any control over the
ment extending between an actuating element
changes in length of the bottom strings occur
and an actuated element, said device comprising
ring from-a similar cause. However, the top string
a plate suspended by its top from said connect
is such a large percentage of the total length and
ing element and having a narrower top portion‘
the bottom string such a small percentage of the 30 and a wider base portion, whereby said plate is
total length that the variations in length of the
raised and lowered by a movement of said actuat
bottom string are not of a serious consequence.
ing element'which is transmitted to said connect
It is apparent that the speci?c illustrations
ing element, reciprocating means engaging the
shown above have been given by way of illus
base portion of said plate when the plate is in
tration and not by way of limitation and that the 35 the raised position and swinging said plate, and
described methods and devices are subject to wide
another connecting element connected to said
variation and modi?cation, without departing
plate and said actuated element and transform
from the scope or intent of the present invention;
ing solely said swinging movement of the plate
all of such variations and modi?cations are to be
into a pulling movement of the second-mentioned
included within the scope of the present inven 40 connecting element, said means being adapted to
tion.
‘
engage said plate in a plurality of places to com
What is claimed is:
pensate for an extension or contraction of the
1. In combination with a textile machine of
the type having a plurality of thread-actuating
elements and a jacquard having pulling elements
for operating said thread-actuating elements, and
elongated connecting elements having ends at
tached to said pulling elements; a device for com
pensating for the expansion and contraction of
said connecting elements, said device comprising '
other connecting elements connected to said
thread-actuating elementsand plates connected
to the ?rst-mentioned connecting ‘elements and
?rst-mentioned connecting element.
4. In textile machinery, a device for compen
sating for the extension and contraction of an
elongated connecting element extending between
an actuating element of a jacquard and an actu
ated thread-operating element of a textile ma
chine, said device comprising a plate suspended
by its top from said connecting element and hav
ing a narrower top portion and a wider base por
tion, whereby said plate is raised and lowered by
a movement of said actuating element which is
the second-mentioned connecting elements, said
transmitted to said connecting element, a shog
plates and said second-mentioned connecting 55 ging bar, and means reciprocating said shogging
elements being so located in relation to the ?rst
bar close to said plate, the tip of said shogging
mentioned connecting elements that a reciproca
bar moving above the base portion of said plate,
tion of a pulling element is transmitted by a ?rst~
said shogging bar being devoid of engagement
mentioned connecting element to a plate, but is
with said plate in the lowered position of the lat-‘
not transformed into a pulling movement of the 60 ter and striking the base portion of said plate
second-mentioned connecting element connected
when the plate is in the raised position and swing
to the plate, and means engaging said plates
ing said plate, and another connecting element
when they are in raised positions to move such
connected to said plate and said actuated ele-v
ment and’ transforming solely said swinging
raised plates along with the second-mentioned
movement of the plate'into a pulling movement
connecting elements, connected to said raised
of the second-mentioned connecting element, said
plates, and thereby to cause such second~men~
shogging bar being adapted to strike said plate
tioned connecting elements to carry out pulling
in a plurality of places to compensate for an ex-,
movements, said means being adapted to engage
said plates in a plurality of places to compensate
tension or contraction of the ?rst-mentioned
for an extension or contraction of the ?rst-men 70 connecting element.
tioned connecting elements.
'
JONAS ROBINSON.
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