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Патент USA US2138221

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Nov. 29, 1938.
R. G. TURNER
‘2,138,221
SHUTTLE FOR AUTOMATIC LOOMS
I
Filed Jan. 2, 1937
-
Inventor
Richard fl‘rTurner
£44m?!
Attorney
Patented Nov. 29, 1938
.
*
2,138,221
UNITED STATES PATENT OFFICE
2,138,221
SHUTTLE FOR AUTOMATIC LOOMS
Richard G. Turner, Worcester, Mass., assignor to
Crompton & Knowles Loom Works, Worcester,
Mass, a corporation of Massachusetts
Application January 2, 1937, Serial No. 118,787
4 Claims.
(Cl. ‘139—207)
This invention relates to improvements in auto-
the shuttle when the latter is being boxed and
matlc looms and more-particularly for means for
preventing spring clips from spreading due to
momentum of the bobbin when the shuttle is
.5 boxed.
When bobbins oval in transverse section are
used it is necessary to maintain the long trans-
therefore eliminate possibility of the bobbin turn
ing on its axis.
With these and other objects in view which
verse axis horizontal.
If this axis becomes ver-
tical the lower edge of the weft projects below
‘to the bottom of the shuttle and interferes not only
with correct shuttle boxing, but also‘ interferes
with the lower sheet of warp threads during. the
?ight of the shuttle.
‘
It has been discovered that there is a tendency
is on the part of a bobbin to rotate about its longi-
tudinal axis during weaving, particularly when a
bobbin is held by means of spring jaws which en-
gage rings on the head of the bobbin. An angular
motion su?icient to give the bobbin a quarter turn
20 would place the long transverse axis vertical and
interfere very objectionably with the proper picking of the shuttle and result also in damage to
the lower part of the mass of weft,
The shuttle moves at a high rate of speed and
in 5 is brought to rest abruptly by engagement with
will appear as the description proceeds, my in- 5
vention resides in the combination and arrange
ment of parts hereinafter described and set forth.
In the accompanying drawing, wherein a con
Vehieht embodiment of my invention is Set forth,
Fig. 1 is a top plan view of one end of a lay 10
Showing a Shuttle made according to my Dreseh
invention,
'
Fig. 2 is a. vertical section on an enlarged scale
On line 2-2, Fig- 1,
Fig. 3 is a diagrammatic view illustrating the 15
transfer mechanism, and
Fig- 4 is a horizontal Section on line 4——4 of
Fig- 2
Referring more particularly to Fig- l, I have
shown a 100m lay “1 having‘ a Shuttle bOX B to .20
receive a shuttle S provided with a bobbin H.
The bobbin may be of the so—oa11ed oval or flat
type wherein the barrel on which the weft W is
wound has a horizontal transverse dimension
the picker. This stopping or" the shuttle mo~
tion is attended with considerable shock and as a
result there is a tendency on the part of the
bobbin to continue movement in the direction of
39 travel of the shuttle due to its momentum. Because of the shape of the contacting surfaces
between the rings and the spring jaws the latter
spread slightly due to the fact that the bobbin
tends to continue its motion when the shuttle is
abruptly stopped. When the momentum of the
bobbin is spent the jaws move back to their normal position. If at this time the spring forces
acting on the bobbin are not balanced there will
be a slight turning moment tending to rotate the
40 bobbin about its longitudinal axis.
It is an important object of my present invention to prevent the aforesaid slight spreading
of the jaws when the shuttle is boxed. As set
forth hereinafter I accomplish this result by pro45 viding the shuttle with resilient blocks or" rubber
or the like which are suf?ciently strong to resist spreading of the jaws by any force which
greater than the vertical dimension and the weft
takes the gener-alformihdioated in Fig- 2.
The bobbin has a head E15 prdvided'with ‘the
customary metal rings [6 which are received by a
Spring Clip IT having front and real‘ laws l8 and
'9, respectively These laws are grooved in the
usual manner, a Suggested in Fig- 4. to receive
the rings '5- The rings and the Wooden head
of the bobbin on which they'are mountedtogether
With the Spring 011D n are of the usual Construc
tion. The box B has a shuttle binder 28 and a
binder Spring 21 and the Shuttle 15' plhpelled- by
a picker 22 in the usual way.
When the shuttle is boxed it strikes the picker
22 with considerable force and is brought to rest
abruptly, since the picker lies against the box
end 23. As a result the bobbin, because of its
momentum, tends to move toward the picker and
the round rings bearing against the bevels 25
of the sides of the grooves 26 tend by reason of
the force exerted due to momentum to spread
the jaws slightly. This force is not very large
but is su?icient to cause a temporary separation
may be exerted by the rings of the shuttle against
the bevelled grooves of the jaws incident to box-
of the jaws l8 and I9.
The matter thus far described is of known
50 ing.
The blocks, however, are suihciently re-
silient to yield under the positive force exerted
by the transferrer at the time a new bobbin is
being inserted into the shuttle. By provision of
these means I maintain close contact between
55 the rings of the bobbin and the spring jaws of
25
30
v35
40
45
construction and of itself forms no part of my 50
present invention.
In carrying my invention into effect, I pro
vide the shuttle with blocks 30 of slightly resilient
rubber which are interposed between the front
and back shuttle walls 3| and 32, respectively, 55
2
2,138,221
as shown, and the jaws I8 and I9, respectively.
These blocks may be recessed into the shuttle
walls or held therein in any other approved
manner. The blocks 30 bear against the outer
ing from the spirit and scope of the invention and
I do not wish to be limited to the details herein
disclosed, but what I claim is:
1. In a shuttle for an automatic loom, integral
vertical walls of the adjacent jaws and create
sufficient resistance to prevent spreading of the
shuttle by momentum of the bobbin when the
shuttle is boxed.
spaced resilient bobbin holding jaws mounted in
the shuttle, a bobbin having rings held by the jaws
and tending by the momentum thereof to spread
the jaws apart when the shuttle is boxed, and
It is necessary to make provision for trans
IO ferring a new bobbin into the shuttle, and this
result may be accomplished as shown in Fig. 3 by
a transferrer arm 40 movable about a pivot 4|
and is actuated by a latch 42 pivoted to the arm
at 43 and movable by mechanism not shown but
a block of slightly resilient material for each
jaw, each block located between and contacting 10
the corresponding jaw and an adjacent part of
the shuttle adjacent to the rings, said blocks
resisting the tendency of the jaws to spread apart
when the shuttle is boxed.
2. In a shuttle for an automatic loom, in
well understood into the path of the dagger 44 on
the lay. A reserve bobbin 5!] is presented in any
tegral spaced resilient bobbin holding jaws mount
approved manner under the transferrer arm when
ed in the shuttle, a bobbin head with rings held
a transfer is to take place.
The advancing lay
depresses the rear end of the transferrer arm to
force the reserve bobbin 50 against the bobbin
lever. At this time the blocks 30 will not be able
to prevent spreading of the spring jaws under the
action of the positive force exerted by the trans
ferrer arm, and the reserve bobbin 50 will there
fore pass into the shuttle and the depleted bobbin
I I will be expelled downwardly through a slot Si
in the lay. As soon as the transferring action is
completed the blocks 30 will spring back to their
normal condition where they are effective to re
sist a separation of the jaws when the shuttle is
boxed.
It is to be understood that my present inven
tion contemplates a particular relationship be
tween three forces the strongest of which is ex
erted by the transferrer arm through the in
coming bobbin and the weakest of which is ex
erted by the momentum of the bobbin tending
to spread the jaws when the shuttle is boxed.
Lying intermediate these two forces is the re
40 sistance offered by the blocks 30, these blocks
being strong enough to resist compression when
the shuttle is boxed, but yielding sufficiently to
by the jaws and tending by the momentum there
of to spread the jaws apart when the shuttle is
boxed, and a block of slightly resilient rubber for 20
each jaw, each block of rubber engaging the
shuttle and also the corresponding jaw adjacent
to the rings on the head, said blocks resisting the
tendency of the jaws to spread apart when
the shuttle is boxed.
25
3. In a shuttle for an automatic loom, a pair of
integral resilient substantially parallel jaws
mounted in the shuttle and extending along walls
of the shuttle and having grooves therein, a
bobbin having a head provided with rings to 30
enter the grooves of the jaws, said bobbin tend
ing by its momentum to spread the jaws apart
when the shuttle is brought to rest, and a block
of resilient material between each jaw and the
adjacent shuttle wall acting in addition to the 35
resilience of the jaws to prevent separation of the
latter by the momentum of the bobbin, said blocks
being located between the grooves in the jaws and
the adjacent shuttle walls.
4. In a shuttle having spaced vertical walls, a 40
spring member mounted in the shuttle and hav
ing two spaced resilient integral jaws, each jaw
permit a normal transfer when the transfer arm
extending along one of the walls, each jaw hav
40 descends.
From the foregoing it will be seen that I have
provided a shuttle wherein the spring jaws are
ing transverse grooves therein on the sides there
prevented from separation by engagement with
the slightly resilient means interposed between
the jaws and the walls of the shuttle when the
shuttle is boxed. It will also be seen that the
resistance offered by these resilient means rep
resents a force which lies between that exerted
by the transferrer arm and the force of the mo
mentum derived from the bobbin when the shuttle
is boxed.
Having thus described my invention it will be
seen that changes and modi?cations may be made
therein by those skilled in the art without depart
15
of opposite the adjacent wall, a bobbin having 45
a head provided with holding rings which enter
the grooves in the jaws, the momentum of the
bobbin tending by reason of contact between the
rings and the jaws to spread the latter when the
shuttle is brought to rest, and a block of rubber
60
between each jaw and the adjacent shuttle wall,
each block of rubber engaging the corresponding
jaw along the surface opposite the grooves there—
of and acting in addition to the resilience of the
jaws to resist spreading of the latter by the bobbin
when the shuttle comes to rest.
RICHARD G. TURNER.
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