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Патент USA US2067761

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Jan. 12, 1937.
> w. R. HEWTON
' 2,067,761
WEFT SEVERING MECHANISM FOR L6OMS_
.Filfed July 24, 1935
6 Sheets-Sheet l
I
~90
_
‘
INVENTOR:
mlbiam R. 77211113011
Jan- 12, 1937- ‘
w. R. HEWTON
‘2,067,761
WEFT SEVERING‘MECHANISM FOR LOOMS
Filed July 24, 1935
6 Shéets-Shéet 2
WITNESSES:
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W707”
’
INVENTOR:
WiZiiam R. mwm
‘ BY
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s.
Jan. 12, 1937. ‘
‘
2,067,761
w. R. HEWTON
_ WEFT SEVERING MECHANISM FOR LooMs
Filed July 24, 1935
6 Sheets-Sheet 5
' WITNESSES.
INVENTOR:
"6555mm 1?. TIER/ion.
BY
I’,
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‘Y TORNEYS.
I
Jan. 12, 1937.
'
, w. R. HEWTON
-
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2,067,7'61
WEFT SEVERING MECHANISM FOR LOOMS
Filed July 24, 1955
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6 Sheets-Sheet 4
FIC71 ZIZ
TYiLZJiam RJ-lBWm
_
TTORNEYS.
Jan. 12, 1937.‘
w. R. HEWTON
_
' 2,067,761
WEFT SEVERING MECHANISM FOR LOOMS
Filed July 24, 1935
6 Sheets-Sheet 5
FIG_ m_
10“
hr;
3
WITNESSES ' '
5
_
._
INVENTOR:
' Wr/Umm Emu/Eon,
BY
'
TORNEYS
Jam;v 12, 1937.
w. R. HEWTON
2,067,761
WEFT SEVERING MECHANISM FOR LOOMS
Filed July 24, 1935. '
s Sheets-Sheet é
'
INVENTOR:
Wiiliam R?kwion,
BY
TTORNEYS.
.
Patented Jan. 12, 1937
2,067,761
UNITED STATES PATENT GFFICE
2,067,761
WEFT SEVERING MECHANISM FOR LOOMS
William R. Hewton, Philadelphia, Pa, assignor
to Collins & Aikman Corporation, Philadelphia,
Pa, a corporation of Delaware
Application July 24, 1935, Serial No. 32,823
12 Claims. (01. 139—-263)
This invention relates to weft severing mecha
nism useful in connection with automatic weft
replenishing looms, particularly double fabric
looms ?tted with automatic bobbin change mech
anism.
This invention has to do with the severing of
the trailing ends of the wefts extending from the
selvages of the cloth being woven and the shuttles
of the looms at the times when fresh ?lled bobbins
10 from the magazines of the weft replenishing
Fig. VI is a detail sectional view taken as indi
cated by the arrows VI-VI in Fig. V.
Fig. VII is a fragmentary detail sectional view
in plan taken as indicated by the arrows VII—VII
sible to sever the trailing weft ends with precision
and positiveness and so preclude entanglement
with each other and with the moving parts of the
in Fig. IV, and showing one of the weft clamp- 5
ing and severing devices in its normal position
in relation to the shuttle.
Fig. VIII is a view like Fig. VII showing the
weft clamping and severing devices in operative
position in relation to the shuttle.
10
Fig. IX is a vertical detail sectional view taken
as indicated by the arrows IX-IX in Fig. VIII.
Fig. X is a perspective view showing how the
weft is cut incident to interchange of bobbins in
a shuttle of the loom.
15
Fig. XI is a perspective view of one of the weft
loom.
clamping and severing devices.
mechanism are substituted in the shuttles for
bobbins which are empty or very nearly so.
‘The purpose of my invention is to make it pos
This desideratum I realize in practice as
hereinafter more fully disclosed, through provi
sion of a simple and reliable automatic severing
20 mechanism for single or double fabric looms em
bodying devices, one for each shuttle, which, when
the shuttle is indicated for replenishment, is
thrust laterally into the shuttle box, clamps the
weft at opposite sides of a grated opening in the
25 shuttle, and cuts the portion of the weft overly
ing the bars of the grating.
Another object of my invention is to provide
for the actuation of the clamping and severing
devices above referred to through movement de
rived from the lay of the loom so that the sever
ing is effected just as the lay completes a ?nal
active stroke to beat up the trailing end of the
weft of the exhausted bobbin into the fabric and
while the shuttle is awaiting replenishment in the
shuttle box.
Other objects and attendant advantages of this
invention will appear from the detailed descrip
tion which follows of the attached drawings,
wherein Fig. I is a fragmentary longitudinal sec
40 tional view of a double fabric automatic weft re
plenishing loom conveniently embodying the weft
severing mechanism of my invention.
Fig. II is a fragmentary plan section taken as
indicated by the arrows II—II in Fig. I.
Fig. III is a transverse fragmentary section of
the loom taken as indicated by the arrows III—III
in Figs. I and II.
Fig. IV is a fragmentary detail section on a
larger scale taken as indicated by the arrows
IV—IV in Fig. II and showing the elements where
by the clamping and severing devices are directly
actuated.
Fig. V is a fragmentary detail view correspond
ing to Fig. IV showing the parts in a different
position.
’
Fig. XII is a detail sectional View taken as in
dicated by the arrows XII--XII in Fig. XI.
Fig. XIII is a perspective view of the knife 20
member of one of the clamping and severing de
vices; and
'
Fig. XIV is a perspective View of one of the
shuttles of the loom.
The loom which I have chosen to illustrate my 25
invention is an automatic double pile fabric bob
bin changing loom generally of the construction
disclosed in a pending application No. 750,626
?led by me jointly with Whitworth F. Bird, where
to reference may be had for details herein omit- 30
ted. As shown, the loom has a lay I which is
reciprocated horizontally through coaction of
rollers 2 thereon with rotary cams 3 on a con
stantly driven shaft 4. At opposite sides, the loom
is provided with stationary shuttle boxes whereof 35
one is shown at 5 in Figs. I-IV, said boxes having
top and bottom shuttle compartments 6 and ‘l.
Incident to weaving of double fabric F (Fig. X)
in the loom, two shuttles are concurrently thrown
in opposite directions from the respective shut- 40
tle boxes 5 when the lay l is in the retracted po
sition shown in Fig. I, through the subdivisions
of the double shed S, S’ formed by the warps W,
the shuttle assigned for passage between the up
per compartments of said boxes being shown in 45
full lines at 8 in several of the ?gures, and the
shuttle assigned for passage between the bottom
compartments of said boxes being shown in dot
and dash lines in Fig. IV only where it is desig
nated by the numeral 9. Mounted over the illus- 50
trated shuttle box 5 is a storage magazine l0 for
fresh ?lled bobbins which are to be used to re
place the bobbins in the shuttles by automatic
mechanism actuated from the lay I after the
manner set forth in the pending application 55
2
2,067,761
supra. Insofar as the automatic bobbin changing
mechanism of the loom is illustrated, it comprises
an actuating shaft II which is horizontally sup
ported for oscillation in bearings on the frame of
the bobbin magazine I3. Within the magazine
I0 is a vertical bobbin-ejecting plunger I2 which
is coupled, by means of a link I3 with an arm I4
on the shaft I I, the latter also carrying a pendant
arm I5 with lateral projections I6 and I? adapt
ed to be engaged respectively by hook levers I8
and I9 independently fulcrumed at 20 and 2| on
the lay I. Normally, the hook levers I8 and I3
rest horizontally upon stops 22 and 23 on a ?xed
upright bracket 24 with their hook ends respec
15 tively in the range of lateral stud projections 25
and 26 on the armatures 27 and 28 of vertically
positioned solenoids 29, 30 which are suitably
supported in ?xed relation to the frame of the
loom. When the solenoid 29 is energized and the
20 hook lever I8 thereby lifted into engagement with
the stud I 5, the arm I5 is moved counterclockwise
in Fig. I incident to a beat stroke of the lay I to
effect ejection through the plunger I2, of a ?lled
bobbin B from the magazine I0 and depression
25 of such bobbin into the lower shuttle 9 while the
latter rests temporarily in the bottom compart
ment of the shuttle box 5 with incidental ejection
of a substantially empty bobbinfrom said shuttle.
When the solenoid 33 is energized to couple the
30 hook lever I9 with the stud I‘! of the arm I5, the
plunger I2 is similarly actuated during a beat
movement of the lay through a shorter stroke and
depresses a ?lled bobbin B from the magazine In
into the upper shuttle 3 while the latter rests tem
35 porarily in the top- compartment 6 of the shuttle
box 5, the timing of the excitation of the solenoids
'29, 33 being determined after the manner set forth
in the previous application hereinbefore referred
to. The movements of the shaft I I are yieldingly
40 resisted by a torsion spring 3| which tends to
maintain a ?nger 32 on said shaft in engagement
with a ?xed transverse rod 33 on the magazine III.
The loom is moreover provided with a revolving
spool 35 for collecting the loose ends of the wefts
45 T, T’, Figs. I and X extending from the edge of
the fabric F after severance as later on explained,
said spool being journaled in a ?xed bracket 36
and constantly rotated by a belt 37 in the direc
tion indicated from the drive shaft (not illus
50 trated) of the loom. Projecting from the spool 35
is a pair of radial weft engaging hooks 38 which
move through the slot 39 of a ?xed arcuate guard
43 partly surrounding said spool. A Weighted
de?ector 3i freely pivoted on the bracket 35 and
operated by a solenoid d2, normally keeps the
wefts out of the range of the hooks 38 of the
spool 35. When, for example, the upper shuttle 8
is to be replenished, the de?ector 4! is swung
downward to the position shown in Fig. X to per
mit the trailing end of the weft T between said
shuttle and the selvage of the fabric F, to fall back
against the guard 43 into the range of the hooks
38 on the spool 35, and to be caught by one or the
other of said hooks, torn from the fabric, and col
65 lected upon said spool. To insure engagement of
the wefts T with the guard 40 at the time of the
severance, the upper end of a double ended bristle
brush 43 on the lay I presses said weft forward
as shown in Fig. X as said lay completes its beat
strokes.
The weft severing mechanism with which the
present invention is more especially concerned,
includes a lever 45 pendant from one end of the
cross rod 33 of the bobbin magazine ID, see Figs.
IV and V more particularly. As shown, the lever
45 is free on the cross rod 33 and subject to the
action of a torsion spring 46 (Fig. VI) having one
of its ends secured to a ?xed collar 41 on the rod,
and its other end secured to said lever. As a con
sequence of this arrangement, the lever 45 is
maintained in contact with a roller 48 at the end
of a wiper arm 39 on the shaft II. The portion
45a of the lever 45 with which the roller contacts
is of arcuate con?guration, the curvature being
concentric with the axis of the shaft I I when said
arm is in the normal retracted position indicated
in dot-and-dash lines in Fig. IV. An abutment
member in the form of a gravity in?uenced pin
50 is axially slidable in a vertical aperture 5| in
the top of the lever 45 within the limits imposed,
on the one hand, by a head 52 on said pin, and
on the other hand, by a stop projection 53 on the
fulcrum boss of the lever. The function of the
pin 50 will be later on explained. Pivotally con
nected to the lever 45, at 55 and 56 respectively 20
are horizontal members in the form of slides 51
and 58 having their front ends passing through
guide apertures in the shuttle checks 59 and 60
of the shuttle box 5. Each of the slides 51 and 58
terminates in an open head BI which carries three 25
transversely-aligned plunger; a central plunger
62 with a knife end 52a, and two side plungers 63
With buffers 64 of rubber or the like at their outer
ends. Individual springs 65 urge the plungers 62
and 63 forward so that stop collars 36 on them
normally bear against the cross bars 6'! of the
heads GI on the slides 51 and 58. As shown, the
collar 55 associated with each knife plunger 52-is
square with opposite ?ats bearing against the
sides of the central openings in the corresponding 35
head 3I to prevent rotation of said plunger.
The shuttles 8 and 9 are similar in construction,
and, as exempli?ed in Fig. XIV, each has a cen
tral slot 68 vertically through it to accommodate
a bobbin B. The shuttle 8, moreover, has an
opening or eye 59 near one end thereof and a
longitudinal recess ‘III in one side for the weft T.
According to my present invention, each shuttle 8
and 9 is further provided in its longitudinally re
cessed side adjacent the eye 69 with a grated 45
opening ‘II, the grating being formed in this in
stance by parallel vertical rods or wires ‘I2 ex
tending crosswise of said opening.
The operation of the weft-severing mechanism
is as follows:
50
Let it be assumed in Figs. II and III that the
shuttle 8 has just come to rest in the box 5 in
readiness for weft replenishment.
Immediately
the solenoid 36 is energized and the hook lever I9
engaged with a pin I ‘i on the arm I 5 while the lay 55
is retracted as previously explained. Also at the
same time, the solenoid 42 is energized to move
the weft guard M to the position shown in Fig. X.
Upon the next forward or beat movement of the
lay I, the shaft II is turned counter-clockwise 60
with attendant movement of the wiper arm 49
downward from the position 49a to the position
391) in Fig. IV. As the roller 43 on the arm 49,
engages. the protruding lower end of the pin 50 as
shown in Fig. IV, the lever $5 is given a quick 65
movement from the normal dot and dash line po
sition to the full line position. By this sudden
movement of the lever 4-5, the slides 57 and 58
are thrust laterally into the shuttle box 5, the
thrust of the slide 58 being an idle one since the 70
shuttle 3 at this time is absent from said shuttle
box. As the slide 57 is thrust inward of the shut
tle box 5 in the manner just explained, the buffers
54 on the plungers 33 are the ?rst to encounter
the shuttle 8 and clamp the weft (lying at this 75
2,067,761
time in the longitudinal recess 10 of the shuttle)
.at opposite sides of the grated opening ‘H in
said shuttle, and hold said weft taut across the
grating. As the thrust of the slide 5'! continues,
the knife 62a at the end of the plunger 62 pene
trates the grating of the shuttle 8 and cuts the
weft in the interval between two of the grate bars
as clearly shown in Figs. IV, VIII, IX and X.
Obviously the clamp plungers 63 effectively hold
0 the weft against yielding so that the severing is
effected with precision and positiveness. In prac
tice, the grated openings ‘H in the shuttles are
made su?iciently long to insure registry with the
clamping and severing devices notwithstanding
15 slight variations in the positioning of said shut
tles in the shuttle box. As the lay I completes
its beat stroke, the main portion of the old weft
T is held by crossing of the warps behind it and
as a consequence of being pressed by the reed on
the lay against the fell of the cloth, while the sev
ered end of said weft is caught by one of the
hooks 38 of the spool 35 and torn away at or out
ward of the selvage of the fabric F in the man
ner already understood, the roller on the wiper
arm ‘39 having by this time cleared the pin 50
and the lever 45 pulled back by the spring 1156 to
withdraw the clamp plungers 63 from said weft
end. The severing of the weft end T takes place
of course just before the exhausted bobbin B’
3 0 is displaced from the shuttle 8 by a fresh bobbin
B which in the meantime is ejected from the
bobbin magazine I 0 and carried down into the
shuttle box 5 by the plunger l2. As the wiper
arm 49 moves upward concurrently with retrac
35
tion of the lay ‘I, the roller 48 lifts the abut
ment pin 50 as shown in Fig. V so that no move
ment is imparted to the lever 45 at this time.
The clamping and severing devicesthus remain
withdrawn so as not to interfere with the move
4 O ment of the shuttles 8 and 9.
Severance of the weft of the shuttle 9 takes
place in exactly the same way during a weft re
plenishing cycle when said shuttle is indicated
for replenishment and at a time when the shuttle
4 5 8 is absent from the shuttle box 5.
Having thus described my invention, I claim:
1. The combination in a loom having a shuttle,
a shuttle box, and automatic weft-replenishing
mechanism; of weft severing mechanism includ
ing a grate across an opening at one side of the
shuttle, means for clamping the trailing end of
the weft against the grate on the shuttle when
the latter is indicated for replenishment and rest
ing in the shuttle box, and for penetrating the
grate to sever the weft while so clamped.
2. The combination in a stationary loom hav
ing a shuttle, a shuttle box and automatic weft
replenishing mechanism; of weft severing mech
anism including a member adapted to laterally
6 0 enter the shuttle box when the shuttle is indicated
for replenishment and resting in said box, a pair
of yielding plungers con?ned to axial movement
on the member for clamping the trailing end of.
the weft against the side of the shuttle, a yield
ing knife plunger on the member between the
clamp plungers for severing the weft while so
clamped, and means for moving the member into
3
vmeans on said member for clamping the trailing
end of the weft at opposite sides of the grated
opening in the shuttle, a knife on said member
adapted to penetrate the grating on the shuttle
and sever the weft while so clamped, and means 15
for moving the member into the shuttle box as
aforesaid.
4. The combination in a loom having a lay, a
shuttle, a shuttle box, and automatic weft re
plenishing mechanism; of weft severing mecha
nism including a grate across an opening in one
side of the shuttle, a member deriving movement
from the lay for clamping the trailing end of
the weft against the grate on the shuttle when
the latter is indicated for replenishment and rest ,15
ing in the shuttle box, and a member for con
currently penetrating the grate to sever the weft
while so clamped.
5. The combination in a loom having a lay, a
shuttle, a shuttle box, and automatic weft re 20
plenishing mechanism with a bobbin magazine
and a shaft actuated from the lay to operate
means for ejecting a bobbin from said magazine
when the shuttle is indicated for replenishment
and resting in the shuttle box; of weft severing 25
mechanism including a grate across an opening
in one side of the shuttle, a member operated
from the shaft aforesaid for clamping the trail
ing end of the weft against the grate on the shut
tle, and a concurrently operated member for 30
penetrating the grate to sever the weft while so
clamped.
6. The combination in a loom having a shuttle,
a shuttle box, and automatic weft replenishing
mechanism; of weft severing mechanism includ 35
ing a lever, a member connected to the swinging
end of the lever and adapted to laterally enter
the shuttle box when the shuttle is indicated for
replenishment and resting in said box, clamp the
trailing end of the weft against a surface of the 40
shuttle, and sever the weft while so clamped, at
rock shaft, means for giving the rock shaft one
oscillation incident to each weft replenishment,
an actuating arm on said shaft, and means de
termining actuation of the lever aforesaid by the 45
arm during the swing of said arm in one direction
only.
7. The combination in a loom having a shuttle,
a shuttle box, and automatic weft replenishing
mechanism; of weft severing mechanism includ 50
ing a lever, a member connected to the swinging
end of the lever and adapted to laterally enter
the shuttle box when the shuttle is indicated for
replenishment and resting in said box, clamp the
trailing end of the weft against the side of the 55
shuttle, and sever the weft while so clamped, a
rock shaft, means for giving the rock shaft one
oscillation for each weft replenishment,_an arm
on said shaft wiping an arcuate portion of the
lever concentric with the shaft, and a gravity 60
in?uenced pin with one end projecting radially
inward of said arcuate portion of the lever, said
pin yielding to displacement when the arm moves
in one direction but resisting displacement when
said arm moves in the opposite direction with re 65
sultant impartation of movement to the lever.
anism including a grate across an opening in one
8. The combination in a loom having a lay, a
shuttle, a shuttle box, and automatic weft re
plenishing mechanism with a bobbin magazine
and a rock shaft actuated from the lay to operate 70
means for ejecting a bobbin from said magazine
when the shuttle is indicated for replenishment
side of the shuttle, a member adapted to laterally
enter the shuttle box when the shuttle is indi
mechanism including a lever, means on the
the shuttle box as aforesaid.
3. The combination in a stationary loom hav
ing a shuttle, a shuttle box, and automatic Weft
replenishing mechanism; of weft severing mech
cated for replenishment and resting in said box,
and resting in the shuttle box; of weft severing
swinging end of the lever adapted to laterally en 75
ter the shuttle box when the shuttle is indicated
for replenishment and resting in said box, clamp
the trailing end of the weft against the side of the
shuttle,’ and sever the weft while so clamped, and
an armon the actuating shaft of the’ bobbin
vmagazine adapted to wipe said lever and there
having a lay, two shuttles adapted to be concur
rently picked from opposite sides of the loom, a
shuttle box with separate compartments for the
two shuttles, and automatic Weft replenishing
mechanism with a shaft to actuate means for
ejecting a bobbin from the magazine when one
by effect operation of the clamping and severing
or the other of the shuttles is indicated for re
‘means as aforesaid.
9. The combination in a double fabric loom
plenishment and resting in said box; of weft sev
ering mechanism including» grates across open
ings in the sides of the respective shuttles, means
operated from the shaft aforesaid for clamping
the trailing end of the weft of the indicated shut
tle against the grate on such‘ shuttle, and for
:10 having two shuttles adapted to be concurrently
‘picked from opposite sides of the loom, a shuttle
box with separate compartments for the two
shuttles and automatic weft replenishing mech
anism; of weft severing mechanism including
penetrating the grate to sever the weft while so
grates across openings in the sides of the respec
tive shuttles, means operative when one or the
other shuttle is indicated for replenishment and
clamped.
resting in said box, for clamping‘ the trailing end
of the weft against the grate on such shuttle, and
for penetrating the grate to sever the weft while
so clamped.
10. The combination in a double fabric loom
having a lay, two shuttles adapted to be concur
rently thrown from opposite sides of the loom, a
shuttle box with separate compartments for the
two shuttles, and automatic weft replenishing
‘mechanism; of weft severing mechanism includ
ing grates across openings in the sides of the re
spective shuttles and means deriving movement
Q30 from the lay and operative when one or the other
>
rently picked from opposite sides of the loom, a
stationary shuttle box with separate compart
ments for the two shuttles, and automatic weft 20
replenishing mechanism with a shaft to actuate
means for ejecting a bobbin from the magazine
when one or the other of the shuttles is indicated
for replenishment and resting in said box; of weft
severing mechanism including grates across 25
openings in the sides of the respective shuttles,
a lever operated from the shaft aforesaid, a pair
of members on said lever adapted to laterally en
ter the respective compartments of the shuttle
box, and means on each of said members for 30
shuttle is indicated for replenishment and; resting
clamping the trailing end of the weft of the cor
in said box, for clamping the trailing end of the
weft against the grate on such shuttle, and for
penetrating the grate to sever the weft while so
responding shuttle against the grate on the shut
tle when such shuttle is indicated as aforesaid,
and for penetrating the grate to sever the yarn
clamped.
while so clamped.
11. The combination in a double fabric loom
15
12. The combination in a double fabric loom
having a lay, two shuttles adapted to be concur
‘
WILLIAM R. HEWTON.
35
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