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Патент USA US3080904

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March 12, 1963
P. w. MORRISON
3,080,894
MEANS FOR CONTROLLING 1.00M HARNESSES
Filed March 22, 1961
5 Sheets-Sheet 1
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INVENTOR.
PRICE WALTER Mam/s0”
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March 12, 1963
P. w. MORRISON‘
3,080,894
MEANS FOR CONTROLLING LOOM HARNESSES
Filed March 22, l 961
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5 Sheets-Sheet 3
March 12, 1963
_
Filed March 22, 1961
P. w. MORRISON
3,030,894
MEANS FOR CONTROLLING LOOM HARNESSES
5 Sheets-Sheet 4
INVENTOR.
PRICE WALTL‘R MORRISOIY
March 12, 1963
P. w. MORRISON
3,080,894
MEANS FOR CONTROLLING LOOM HARNESSE'S
Filed March 22, 1961
5 Sheets-Sheet 5
'
[12' g. 8
136
INVENIOR.
PF/C'i WALTCI? M08816”!
United States Patent 0'"
1
3,080,894
:MEANS FOR CDNTROLLING LooM HARNESSES
Price Walter Morrison, Chester, S.C., assignor to The
Springs Cotton Mills, ‘a corporation of South Carolina
Filed ‘Mar. 22, 1961, *Ser'. No., 97,544
10 Claims. (0.139e-80)
This invention relates to means for controlling the
‘harnessesof a loom during weaving, and more particular
1y to means for controlling the harnesses by periodically
restraining the harnesses in one'position while more than
one pick are-being laid in the shed.
3,080,894
_ H Patented Mar.v 1 2, w191?.’5
2
the chain travels. In this arrangement‘the chain may
“be of‘ substantial length‘ and yet be compactly arranged to
occupy a relatively small space, and more importantly to
occupy the normally unusedspace above the loo‘m without
requiring additional floor space.
‘The‘pattern chain 'actuates a slida'ble cable that extends‘
from the actuating means to the harness restraining means
for actuation of the latter.
‘In the preferred embodiment the harness restraining
means comprises a-t-rea-dle latch that is movable into the
,path of the ‘harness treadle-to engage the treadle and pre
vent movement thereof so that the treadle cannot move
Heretofcre controlling the ‘shedding operation of 100111
the hamessesfrom one position to another. This treadle
harnesses has required special loom constructions, such
latch is moved into the path of the treadle by a linkage
-"as dob‘by looms and Jacquard looms, or other complex 15 “that is driven from the main cam shaft when actuated
and expensive mechanisms. No simple and easily adapt
by the cable fromwthe actuating means.
‘able apparatus has been developed to control harnesses
of simple looms, such as‘ cam looms. Operation-of these
simple looms has been limited to plain weave patterns
without variations in the shedding motion.
By the present invention, simple, practical and inex
pensive means are provided for controlling loom harnesses
‘so that the harnesses can be restrained in one position
during ‘the insertion of a number of picks in the shed to
thereby-produce a pattern in the cloth being woven, such
vas to produce a cord-like appearance.
The means of the present invention are applicable to
The means for controlling the take-up motion com
prises a linkage for disengaging the gears of the conven~
tional take-up mechanism and is‘operated from a linkage
of the‘harness restraining means so that the harnesses
and thetake-up motion are simultaneously controlled.
The actuation of the harness restraining means and
" take-up control means is timed to occur when the treadle
is at the end of a normal stroke and the harnesses are
holding the warp in one of the open shed positions. When
actuated the treadle latch moves into the path of the
treadle and holds the treadle in this position when it
would normally be moving to the opposite position. The
‘ adapted to simple cam looms. It is easily attachable as
treadle latch is then released while the treadle remains in
' a separate unit to ‘existing looms without disassembling 30 the same position as this is ‘again the normal position.
‘ the'loom and with a minimum of time and 'e?ort.
Thus, the harnesses will be in one position during the lay
As compared with other devices, including loom con
ing of three consecutive picks, i.e., the position immedi
structions such as dobby looms, the present invention is
ately prior to latching, the latching position, and the po
simple and inexpensive to manufacture and ‘attach to a
sition immediately following the latching position, which
loom, is‘ea'sily and inexpensively maintained, andis easy 35 is the position that the harnesses would normally be in
to operate. More signi?cantly, the present invention does
at this point.
not restrict or in any way reduce the Speed of the loom
If desired the actuating means can be designed to ac
operation, but will operate eiiectively at normal operating
tuate the harness restraining means to move the latch
“speeds of cam looms, which produce at a‘much grea‘er
‘into treadle engaging position on two or more alternate
‘number of picks per minute than do dobby looms that 40 strokes of the treadle so that the harnesses will remain
‘are limited in speed due to the complexity of the parts.
in the’ same position for the ?rst three picks and for two The‘con'trol of the ‘harnesses by the present invention
additional picks for’each additional latch engagement, i.e.,
'is accomplished by actuating means operated by the drive
one ‘pick ‘to each additional latch position and another
'motion of the loom, which actuate harness restraining
pick for each subsequent normal position, which-is the
various types of looms and in particular have been
45 same as the latch position.
means ‘and take-up motion control means.
The actuating means includes a pattern device that
During the insertion of picks while the harnesses are
operates in relation to the weaving operation of the
“loom to periodically operate the actuating means, which
in turn operates the harness restraining means that engage
held in'one position it is normally desirable that the warp
be‘taken up slightly to accommodate the ?lling being in
serted. This is accomplished in the preferred embodi
50
and stop the harnesses "in one position to allow 'alnumber
ment by actuating the means for disengaging the take-up
‘or picks ‘to be inserted in a single-shed, and subsequently
motion only on the actual “held stroke of the harness
disengage the harnesses to permit the harnesses ‘to resume I
treadle. Thus ‘with one latch engagement, during which
their regular shedding motion.
three picks are inserted, the take-up will be disengaged for
The .means vfor controlling the take-up motion‘ are
only one pick and for more than‘one latch engagement
also controlled by the actuating means and are actuated
simultaneously/‘with the actuation of the harness re
straining means 'so that when the harnesses are held in‘
one position the take-up motion will be controlled to take
‘up less warp. This is signi?cant as less warp is needed
per pick when the warp is dwelling in one shed position
~ for a‘number of picks.
the take-up will be disengaged'for only the actual latch en
gagements and not the‘preceding'and following normal
positions ‘when the ‘harnesses are normally in the same
.iposition'as when latched.
.
From "the ‘above it is apparent that the present inven
"tion provides a simple ‘and practical-means for control
ling theharnesses of a loom so that the harnesses will be
'In the preferred‘ embodiment of the ‘present .inv‘ention'th'e
positively and directly/restrained in "one position while
actuating means comprises a pattern chain thatis driven
‘laying a ‘plurality of ‘picks. The apparatus is ‘compact,
by the main drive shaft of the loom and is provided with
requiring no additional ?o‘or space, ‘and can easily be
indicator pins or other elements that periodically, in ‘a 65 "adaptedlas an attachm‘ent‘to an existing loom without'dis
i elected pattern, engage and move an actuator arm.‘ This
assembly "or substantial modi?cation of the loom, and
‘actuator arm operates’a slidable cable that extends to the
‘without restricting or slowing the normal production rate
harness restraining means to actuate said restraining
*of the‘loom.
‘means vfor holding the harnesses in one position.
Other and further ‘features and advantages of thepres
70
The pattern chain of the actuating means is uniquely ‘ ~ent inve'ntioncwill be apparent-from thefollowing descrip~
‘arranged in a horizontal position above the loom in :a
@tion ‘and drawings, in which:
'
Etray that 'carriesla tpliira‘lityuot sprockets around ‘which
: ._FIG,;1vis~‘a.fro,nt elevation view'of 1a cam loom‘having '
3,080,894
4
attached thereto the preferred embodiment of the means
for controlling harnesses of the present invention;
FIG. 2 is a vertical sectional view taken along line
.
. .58 which in combination with the one drive sprocket 60
FIG. 3 is, a vertical sectional view taken along line
3—3 of FIG. 2;
‘
FIG. 4 is a top plan view of the pattern chain and
associated elements of the embodiment of FIG. 1; and 1
FIGS. 5 through 8 are diagrammatic views showing
the relative positions of the elements of the harness con 10
trol means during operation thereof.
‘The preferred embodiment of the harness control
means 10 of the present invention, illustrated in they
drawings, is constructed as an attachment to a cam loom
.12 and is attached to the loom, with only minor modi?ca
tions of the loom to drivingly connect the harness con
trol means to the drive motion of the loom. The cam
loom 12 illustrated in the drawings is a model X cam
provide eight longitudinal‘ and one transverse reaches for
the chain. One of the idler sprockets, such as that in
dicated by the numeral 62, can be adjustably mounted
for adjusting the tension of the chain 56.
The drive sprocket 60 is driven by a vertical drive rod
64 that is driven through bevel gears 66 by the main
cam shaft 16. Thus the chain is continuously driven
from the main drive motion of the cam and is timed in
relation to other elements driven from the main cam
shaft16.
- . The pattern chain 56 carries vertically extending in
dicator pins 68 that are spaced along the chain in a se
lected pattern for actuation of the harness control means
10 of the present invention at desired times with respect
to the operation of the loom.
A pivoted follower arm 70 is mounted in the tray 54
‘for pivotal movement in a horizontal plane. This fol
lower arm 70 is located adjacent the drive sprocket 60
loom made by Draper Corporation, Hopedale, Mass. It
is of conventional construction and is illustrated herein 20 and has a follower ?nger 72 that extends into the path
of the pins 68 on the chain 56 so that the pins 68 engage
only as an example of a loom to which the present in
the ?nger 72. As the pins 68 move past the ?nger 72
vention can be attached. The details of the elements of
they displace the ?nger and follower arm 70 causing the
the loom will not be described except as they relate to
-follower arm to pivot about the pivotal connection 74
the present invention, as these details are well known in
at which it is mounted to the tray 54. This displace7
the art.
ment causes the outer end 76 of the follower arm 70 to
As seen in FIG. 1, the loom 12 includes a frame 14
.. move away from a stop bracket 78 and displace a slidable
which supports and carries the other elements of the
pin 80 that is on the end of a slidable cable 86.
loom. The loom is driven by the main cam shaft 16
The slidable pin 80 is carried in a housing 82 and is
which is mounted transversely in the frame 14 and carries
maintained in contact with the outer end 76 of the fol
the harness treadle cam 18 that rotates with the shaft to
lower arm 70 by a coil spring (not shown) in the hous
reciprocate the harness treadle 20 that is pivotally mounted
ing 82 so that movement of the arm 70 displaces the
on the frame 14 and extends transversely wilh respect to
pin 80 and the cable 86. The cable 86 is carried in a
the main cam shaft 16. The harness treadle 20 is con
cable tube 84 that extends from the tray 54 of the actuat
vnected by a strap 22 to the front harness 24. The rear
harness 26 is connected to the front harness 24 by the 35 ing means 46 to the harness restraining means 48 for
actuation thereof.
straps 28 that extend over the pulleys 30 so that recipro
In the preferred embodiment the tray 54 contains an
cation of the harness treadle 20 will reciprocate the
oil bath and is completely sealed to protect the chain 56
harnesses 24 and 26 from one shed position to the other.
from foreign matter so that operation of the actuating
The rear harness 26 is connected by a strap 32 to a coil
means 46 can continue with little or no maintenance
spring 34 that urges the front harness 24 and harness
- problems.
treadle 20 into a raised position thereby maintaining the
The harness restraining means 48 that are actuated by
harness treadle 20 in following contact with the harness
the slidable cable 86 of the actuating means 46 are
treadle cam 18.
mounted beneath the harnesses 24 and 26 and adjacent
Cloth is woven on the loom by the laying of ?lling
the harness treadle 20. The harness restraining means
picks between the warp yarns when the harnesses posi
48 of the embodiment illustrated comprises a shaft 88
tion the warp in open shed positions. The picks are
oscillatably mounted in bearings 90 on the loom frame
laid by a shuttle (not shown) which is thrown across
14 and extending transversely with respect to the main
the loom by actuation of the picker sticks 36.
cam shaft 16. The shaft 88 has ?xed thereon an en
As the cloth is woven it is wound on the take-up roll
38 by means of a take-up mechanism 40 that is driven 50 larged hub 92 which supports a housing 94 connected
to the cable tube 84 and containing a slidable pin 96 at
from the main cam shaft 16 through gears 42 and in
the end of the cable 86. The hub 92 has a lateral exten
cludes an axial clutch 44 that is operable to separate the
sion 98 on which is pivotally mounted an operating pawl
gears 42 to disengage the take-up mechanism 40 and stop
‘100. This pawl 100 has a ?at side 102 in contact with
the take-up of the cloth on the roll 38.
The above described elements of the loom 12 are the 55 the slidable pin 96 so that movement of the cable 86 will
cause the pawl 100 to pivot.
conventional construction of the loom and it is in con
An operating treadle 104 pivotally mounted on the
junction with these elements that the illustrated embodi
loom frame 14 is driven by an operating treadle cam 106
ment of the present invention is operated.
> on the main cam shaft 16 for reciprocation of the operat
The harness control means 10 of the present invention
includes actuating means 46 which actuate harness re 60 ing treadle 104. This operating treadle 104 is engage
able with a lip 108 extending from the pawl 100 on the
straining means 48 that engage the harness treadle 20
side opposite the pin contacting side 102. The pawl is
and hold the harnesses 24 and 26 in one position. This
weighted and balance so that in its normal non-operat
embodiment also includes take-up motion control means
ing position the lip 108 is not in the path of the operat
50 that are actuated by the actuating means 46 upon actua
ing treadle 104, but upon actuation by movement of the
tion of the harness restraining means 48 for disengage
cable 86 and resulting pivoting of the pawl 109 the lip
ment of the take-up mechanism clutch 44 to stop take-up
108 will be in the path of the operating treadle 104 for
of the cloth on the take-up roll 38.
engagement and reciprocation thereby.
The actuating means 46 are e?‘iciently and compactly
mounted above the cam loom 12 on upright supports 52
The pawl 100 is provided with a hub engaging exten
that extend from the loom frame 14 and support a hori
sion 110 at the bottom thereof which in the non-operating
zontally extending tray 54. This tray 54 contains a
position is spaced from a complementary surface 112 on
pattern chain 56 that extends back and forth a number
the hub 92 and upon pivoting of the pawl 100 by the
cable 86 the hub engaging extension 110 will abut the
of times within the tray 54 and extends around ‘a num
hub surface 112 so that reciprocation of the operating
ber of idler sprockets 58 and one drive sprocket 60. In
the embodiment illustrated there are eight idler sprockets 75 treadle 104 will betransmitted through the lip 108and.
5
‘hub extension 110 to cause the'hu'b 9‘2 and therefore the
shaft 88 to oscillate.
The shaft 88 also carries a latch operating ?nger114
that is ?xed on the shaft for'oscillation therewith. This
>?nger 114 is connected by a strap 116 and ‘hooks 118 to
the top end of a latch member 120 that is mounted on ‘a
pivotpin 122 in a latch supporting‘framework 124. This
harnesses are held‘in' the ‘down treadle position ‘for the
normal down treadle'stroke, thelatching ‘stroke, 'which
would ,be- a normally pp-strokefaridthe subsequent nor
mally down stroke,_>During each of ‘thesegstrokes'the
shuttle is laying'the ?lling pick in, theshed and thus three
. picks are laid for each actuation‘ of the’ latch member 120.
Each indicator pin 68 on the pattern chain 56 causes
framework 124 surrounds the harness treadle 20 and is
slotted as at 126 to permit unhindered oscillation of the
treadle 20. The latch member 120 is mounted alongside
the harness treadle 2t) and is pivoted by the latch operat
ing ?nger 114 to position its lower end 128 above the
harness treadle 20 when the harness treadle is in its
lowermost position as seen in FIGS. 6, 7 and 8. The
lower end 128 of the latch member 120 is inclined so
one actuation of the latch member 120 and therefore
‘one pin by ‘itself represents three picks being ilaid in a
single shed. If his vdesired to lay additional picks in the
same shed, more than one pin can be arranged sequen
tially at-points spaced equivalent to alternate strokes of
the harness treadle 20 so that'the latch ‘member v120 will
be actuated on consecutive down ‘strokes Fo'f‘th'e harness
treadle 20. Each additional pm, which results in ‘an
additional holding of the harness treadle,?will cause two
that when it is pivoted into treadle engaging position-it
will be substantiallyiparallel to the top of the treadle.
The elements of the harness restraining means 48 are
additional picks to'be ‘laid in‘the shed in addition/to: the
threepicks laid ‘during actuation by the ?rstpih. _Thus
maintained in the normal non-operating position of FIG.
each subsequent pin will cause the latch member 120 to
3 by a spring 130 having one end v13:2 ‘connected to the 20 hold the harness treadle in the down positienv'for a nor
loom frame 14tand' its other end~134 connected to a lever
mal up stroke, following which the harness treadle will
_ arm 136 extending from and ?xed to the shaft 88.
be in the same .position for its normal down position. In
'the embodiment illustrated ‘the pairs 160 or pins will
The lever arm 136 also serves a‘sthe operating lever
. for the take-up motion control means 50‘that is thereby
cause. ?ve picks to be inserted in one shed.
‘actuated simultaneously through the common shaft 88. 25.
» with the harness restraining means 43 upon‘o‘perating o
the actuating ‘means 46.
‘
A connecting rod 138 has one end 140' connected to
the lever arm 136 and has its'other end 142 connected
to the base 150 of a V-shaped clutch operating member
144 that has one leg 146 pivotally connected to a'?xed
pivot ‘pin 147 on the loom frame 14 and has its other
leg 148 connected to the let-back lever 149 of the con
As the take-up motion control means 50 are operated
from theshaft 88 of the harness restraining means 48 it is
apparent that the clutch 44 disengag'es the gears 42 only
during the single latchingstroke "of the harness treadle
20 and not during the preceding and subsequent strokes.
Thus when'three picks are being laid in one position of
the harnesses the take-up motion isdisengaged only dur
ing‘pone of the three strokes. This permits partial take-up
of ‘the cloth, which is desirable to obtain a corded effect in
ventional take-up motion mechanism 40. The ?rst leg
the cloth. The period of disengagement of the take-up
146 extends beyond the pivotpin 147 to form the yoke 35 motion can be adjusted in any conventional manner as
- 152 of the standard clutch‘44 of the conventional take
desired .for best results‘ for the particular cloth being
up mechanism 40.
. woven and the particular'yarn being’used, orthe take-up
The elements of the take-up motion control means 50
motion control means can. be eliminated and the loom
‘are arranged and adjusted so that when in the normal
operated through the ‘harness restraining operation with
non-operating position the clutch 44 will position the 40 the take-up motion continuing uninterrupted.
gears 42 in driving relation and upon actuation of the
The sequence of operation of the harness controlling
take-up motion control means 50 the yoke 152 will be
means of the preferred embodiment to restrain the har
displaced and cause the clutch 44 ‘to disengage the gears
. nesses in the down-treadle position during two consecutive
‘42 by axial movement of the left hand gear 156 to the
normal up-strokes is illustrated in FIGS. 5—8. These‘two
left out of engagement with the right hand gear v158.
held strokes, .plus the preceding, intermediate, and subse
The operating treadle cam 106 is shaped with relation
‘ quent normal down strokes, result in the harnesses remaih
to the harness treadle cam 18, as seen in FIG. 2, so that
~ing in one position for the ‘insertion of ?ve picks. This
the operating treadle 164 will reach its lowermost posi
, sequence is actuated by the pair of indicator pins 16'0,‘the
tion slightly after the harness treadle 20 has reached its
first 162 of which is shown in displacing engagement with
lowermost position. These are the positions-at which the 50 the follower arm 70in FIG. '5. At this point the cable
- treadles are at vthe extreme points of the cams. This'rela
tionship permits the harness treadle 29 to reach its lower
most position before the latch member 120 is pivoted by
the operating treadle 104. This delay also results in the
latch member 120 remaining in the path of the harness
treadle 20 when the harness treadle begins its return
stroke and is restrained in approximately its lowermost
56 actuates the pawl 100 to move it from its non-operating
‘ position of FIG. 3 into‘thepa'th ‘of the operating treadle
104. In thejposition of ‘FIG. '5 the vlatch member 120 re
mains in the non-'operating ‘position, ‘the harness treadle
20 has moved to its down position, the operating treadle
104 is about to engage the pawl 190, and ‘the take-up
motion control ‘means St] has not ‘been actuated.
FIG. '6 shows the‘?rst pin 162 passing the follower arm
position by the latch member 120, which is prevented
from pivoting further under the force of the harness
treadle 20 by the opposite side of the latch supporting I 60i 70, but the operating treadle 104 has already engaged the
pawl 100, and has rotated the pawl lti?'and shaft 8810
framework 124.
,
.
.
vpivot the‘lat‘ch member 120into the pat-h'of the harness
Although the operating treadle 104 moves through the
treadle 2G and pivot the take-up control lever arm 136'to
return'stroke, the latch member 12% remains in latching
disengage the clutch 44 and stop'the take-tip mechanism
position as it is held in that position by the force of the
40. The ‘harness treadle 20 is no’wiin’the down position
harness treadle 215'. During this period the harness treadle
with the harnesses in one position as a ?rst pick is being
earn 1% is not in vcontact with the harness treadle 20.
When the harness treadle cam 18 again reaches the nor
- laid.
mal down stroke position it again engages the harness
FIG. 7 shows‘the subsequent opposition of the operat
ing treadle :104, which would normally also he theup
position of the'harness treadle20, but the-harness treadle
. treadle 2:73 and forc'eseit to its lowermost position slightly
out of engagement with the latch member 120, which
falls out of its latching position to permit subsequent
reciprocation of the harness treadle 26.
20 is now'restrained inthe down position by the latch
member 120 to hold the harnesses in the ?rst position
As a result of the above construction, the "harnesses 24
While a second pick is being laid. In this position the.
‘and 26 remainin one position during three normal strokes :. "?rstpiu 162<has past the follower arm 70 and the second
’ z-for‘each actuationof the latch member 120. ‘Thus the 175.. pin 1.164 issapproaching the :arm. -.The;.pawl<10t),»shaft;88
3,080,894
a
'and lever 136 have returned to their normal position with
'the gears 42 again engaging to resume take-up.
The pressure of the harness treadle 20 holds the latch
"member 120 in this position until the next normal down
‘stroke of the treadle, which is illustrated in FIG. 8, and
'during which a third pick is laid while the harnesses are
still in the ?rst position. As seen in FIG. 8, the elements
are in the same position as FIG. 5, except that the second
pin 164 is now engaging and displacing the follower arm
70 to actuate the harness restraining means 48 and take-up
Imotion control means 50.
Following the position of FIG. 8 the elements move to
the position of FIG. 6, but with the second pin 164 passing
the arm 70. In this position the harnesses are again re
strained in a down-treadle'position during a normal up
‘stroke for the laying of a fourth pick in the ?rst harness
position.
‘one pick are being laid in the same shed, said cam loom
being of the type wherein the harnesses are operated by
‘a. harness treadle that reciprocates from one position to
‘an opposite position, said means comprising actuating
means having pattern means driven from the main cam
shaft of said cam loom for periodically operating said
actuating means, harness restraining means having an
oscillatable shaft and a treadle latch connected to said
shaft and movable into the path of said harness treadle
upon oscillation of the shaft for engagement with the
harness treadle to latch said treadle in one position and
prevent reciprocation thereof while latched, said actuating
.means actuating said harness restraining means to move
said treadle latch into latching position upon periodic
‘operation of said actuating means by the pattern means,
- and take-up motion control means connected to said shaft
and operable upon oscillation of said shaft to reduce the
amount of take-up when said treadle latch is in latching
position.
their original non-restraining positions with the latch mem
4. Means for controlling the harnesses of a loom dur
ber 120 falling back to its normal position when the 20
ing weaving, said means comprising actuating means, a
treadle 20 moves to the down position to again position
horizontally extending chain support mounted above said
the harnesses in the same position as the ?fth pick is being
\
On the subsequent down stroke the elements return to
loom, a plurality of rotatable sprockets mounted on said
horizontal support in a substantially horizontal plane, at
with the elements remaining in their normal non-restrain 25 least one of said sprockets being driven by the drive
motion of the loom, a pattern chain supported in a sub
‘ing positions of FIG. 3 until subsequently actuated.
stantially horizontal plane on said support and sprockets
In the above description one embodiment of the present
and driven by said at least one sprocket, an actuator arm
application has been described in detail. However, it is to
and a longitudinally movable cable connecting said actu
.be understood that the present invention is not to be
ator arm and the harness restraining means, said pattern
limited to the speci?c constructions described as it has
chain periodically in a selected pattern operating said
laid.
The loom then resumes normal plain weave operation
' application to many variations. The invention could be
‘adapted to various types of looms other than a cam loom
and the actuating means, harness restraining means, and
take-up motion control means could be varied consider
ably in speci?c construction to accomplish substantially
the basic purposes of the present invention. For example,
the harness restraining means 48 need not be a mechani
cal linkage but could be an electrical device, as could the
take-up motion control means. It is intended that the
scope of the present invention not be limited except by the
appended claims.
i
I claim:
1. Means for controlling the harnesses of a loom during
weaving, said means comprising actuating means, harness
restraining means engageable with the harness operating
means of the loom to restrain the harnesses in one position
while more than one pick are being laid in the same shed,
said actuating means comprising pattern means, an actua
actuator arm and cable, harness restraining means actu
ated by said actuating means upon operation thereof by
the pattern chain, said harness restraining means being
engageable with the harness operating means of the loom
to restrain said harnesses upon said actuation for reten
tion of the harnesses in one position while more than one
pick are being laid in the same shed.
5. Means for controlling the harnesses of a loom during
weaving, said means comprising actuating means having
a pattern chain arranged horizontally above said loom
with a plurality of sprockets around which said chain
travels and means for driving said chain from the drive
motion of the loom, indicator pins carried by said chain
45 and spaced thereon in a selected pattern for controlling
the harnesses, a contact member mounted adjacent said
_ chain for engagement with and displacement by said indi
cator pins as they move thereby, a cable tube mounted
adjacent said contact member and extending therefrom,
tor arm, and a longitudinally movable cable extending 50 a slidable cable carried in said cable tube and having one
from said actuator arm to said harness restraining means
end positioned adjacent said contact member for engage
and movable by said actuator arm to engage and actuate
ment thereby upon displacement of the contact member
said harness restraining means, said actuating means pe
to slide the cable in the cable tube, harness restraining
riodically actuating said harness restraining means into
means engageable with the harness operating means of
said harness restraining engagement with the harness op 55 the loom to restrain said harnesses, said cable tube extend
erating means.
ing to said harness restraining means and said cable being
2. Means for controlling the harnesses of a cam loom
engageable with said harness restraining means for actu
to hold the harnesses in one position while more than one
ation thereof upon displacement of the contact member
pick are being laid in the same shed, said means compris
by the indicator pins to cause the harness restraining
ing actuating means having pattern means-driven from
60 means to engage the harness operating means and hold the
the main cam shaft of said cam loom for periodically
harnesses in one position while more than one pick are
being laid in the same shed.
6. Means for controlling the harnesses of a loom dur
engageable with the harness operating means of the loom
ing weaving, said means comprising a latch member
torestrain said harnesses for retention of the harnesses
‘in one position while more than one pick are being laid in 65 mounted on said loom and movable into engagement with
the harness operating mechanism of the loom to restrain
the same shed said actuating means comprising a longi
movement of the harnesses, a reciprocating operating
tudinally movable cable and an actuator arm, said cable
member mounted on said loom and driven by the drive
' extending from the actuator arm to the harness restraining
motion of the loom, a latch operating linkage connected
means and movable by said actuator arm to engage and
~ actuate said harness restraining means into engagement 70 to said latch member and engageable with said operating
member for movement of said latch member into engage
with said harness operating means, said actuator arm
ment with the harness operating mechanism, means for
periodically -moving said cable to actuate said harness
. moving said latch operating linkage periodically into en
restraining means.
-.
~
gagement with said operating member in a selected pattern
3. Means vfor controlling the harnesses of a cam loom
.to. hold the.harnesse's in one position while- morethan 75 for actuation of said linkage to move said latch member
' operating said actuating means, harness restraining means
8,080,894
16
into engagement with the harness operating mechanism
of said harness treadle, said latch operating linkage hav~
to restrain the harnesses.
ing a pawl thereon movable into the path of said operat
ing treadle for engagement thereby to oscillate said latch
operating linkage and move the latch member into the
path of the harness treadle, means for moving said pawl
periodically into the path or" said operating treadle in a
selected pattern, the harness treadle cam and the operating
’
7. Means for controlling the harnesses of a loom dur
ing weaving, said means comprising a latch member
mounted on said loom and movable into engagement with
the harness operating mechanism of the loom to restrain
movement of the harnesses, a reciprocating operating
member mounted on said loom and driven by the drive
motion of the loom, as oscillatable latch operating link
age connected to said latch member and operable upon
oscillation to move said latch member into harness re
treadle cam being related so that the latch member en
gages and restrains the harness treadle as it starts to move
to the opposite position, the harness treadle thereby being
in the same position when latched as in the previous and
straining engagement with the harness operating mech
subsequent normal positions.
anism, said latch operating linkage having a pawl thereon
10. Means for controlling the harnesses of a cam loom
moveable into the path of said reciprocating member for
during weaving, said cam loom having a harness treadle
engagement thereby to oscillate said latch operating link 15 reciprocated by a cam on a ‘main cam shaft to reciprocate
age and move the latch member into harness restraining
position, means for moving said pawl periodically into the
path of said operating member in a selected pattern.
warp harnesses from one open shed position to the oppo
site open shed position, said means comprising a latch
member pivotally mounted on said loom adjacent said
8. Means for controlling the’ harnesses of a loom dur
harness treadle and movable into the path of the harness
ing weaving, said means comprising a latch member 20 treadle to restrain movement of the treadle, a reciprocat~
mounted on said loom and movable into engagement with
ing operating treadle mounted on said loom, an operating
the harness operating mechanism of the loom to restrain
treadle cam on said shaft engaging said operating treadle
movement of the harnesses, a reciprocating operating
for reciprocation thereof, an oscillatable latch operating
member mounted on said loom and driven by the drive
linkage connected to said latch member and operable
motion of the loom, an oscillatable latch operating linkage 25 upon oscillation to move said latch member into the path
connected to said latch member and operable upon oscil
of said harness treadle, said latch operating linkage having
lation to move said latch member into harness restraining
a pawl thereon movable into the path of said operating
engagement with the harness operating mechanism, said
treadle for engagement thereby to oscillate said latch
latch operating linkage having a pawl thereon movable
operating linkage and move the latch member into the
into the path of said reciprocating member for engage 30 path of the harness treadle, means for moving said pawl
ment thereby to oscillate said latch operating linkage and
periodically into the path of said operating» treadle in a
move the latch member into harness restraining position,
selected pattern, the harness treadle cam and the operat~
means for moving said pawl periodically into the path of
ing treadle cam being related so that the latch member
said operating member in a selected pattern, and take-up
engages and restrains the harness treadle as it starts to
motion control means connected to said latch operating 35 move to the opposite position, the harness treadle thereby
linkage for operation therewith, said take~up motion con
being in the same position when latched as in the previous
trol means being engageable with the take-up motion of
and subsequent normal positions, and take-up motion con
the loom to reduce the amount of take-up upon operation
trol means connected to said latch operating linkage for
of the latch operating linkage.
operation therewith, said take-up motion control means
9. Means for controlling ‘the harnesses of a cam loom 40 being engageable with the take-up motion of the loom to
during weaving, said cam loom having a harness treadle
reduce the amount of take-up upon operation of the latch
reciprocated by a cam on a main cam shaft to reciprocate
warp harnesses from one open shed position to the oppo
site open shed position, said means comprising a latch
member pivotally mounted on said loom adjacent said
harness treadle and movable into the path of the harness
treadle to restrain movement of the treadle, a reciprocat
operating linkage.
References Cited in the ?le of this patent
UNITED STATES PATENTS
702,635
Cumnock et a1 _________ __ June 17, 1902
ing operating treadle mounted on said loom, an operating
treadle cam on said shaft engaging said operating treadle
for reciprocation thereof, an oscillatable latch operating 50
1,541,959
1,752,237
Howarth ______________ __ June 16, 1925
Corn ________________ __ Mar. 25, 1930
1,753,840
Thexton et a1 ___________ __ Apr. 8, 1930
linkage connected to said latch member and operable
2,923,324
Johnson _______________ __ Feb. 2, 1960
upon oscillation to move said latch member into the path
2,980,145
Herard et a1 ____________ _, Apr. 18, 1961
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