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Патент USA US2075668

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March 30, 1937.
Filed May 15, 1956
2 Sheets-Sheet 1
March 30, 1937.
Filed May 15, 1936
2 Sheets-Sheet 2
Patented Mar. 30, 1937
2,07 5,668
Lincoln N. Silver, Lindale, Ga., assignor to The
I Chapman Manufacturing and Sales Corpora
tion, Fulton County, Ga.
Application May 15, 1936, Serial No. 79,991
1 Claim.
Generically, this invention relates to looms but
it more speci?cally relates to the so called smash
protection mechanism of a loom.
In known types of looms it is customary to pro
‘ 5 vide a dagger or daggers which are mounted on
a protector rod journaled in bearings on the lay
of the loom. Spring means of any suitable form
are usually associated with this protector rod and
so disposed with respect thereto and to the lay of
10 the loom that they always urge the dagger or
daggers in a direction which will cause them to
come in contact with the steels in the frogs or with
other members adapted to stop the motion of the
lay. Sincethe spring means just referred to al
as to carry the spring load above referred to and
allow the shuttle to enter and leave a loose box,
consistently shows a power saving of over nine
per cent (9.0%).
with the steels, it is essential that as long as the
loom is operating in a normal manner that means
The invention which forms the subject matter in
of this application is designed to relieve the
shuttle of practically all of the spring load above
referred to and allow it to enter and leave aloose
box and also, when properly adjusted, the inven
tion either entirely prevents or materially reduces 15
the motion of the daggers, the protector rod, the
binder, the binder ?nger, and associated parts
be provided to prevent‘ such engagement, other
thus further reducing power losses. as well as wear
15 ways tend to throw the daggers into engagement
wise the lay would be arrested by such engage
" 20 ment at every beat.
It is conventional practise, as is well known by
those skilled in the art, to cause the shuttle during
every beat of the lay to force the binder against a
lever or ?nger attached to or associated with the
1-25 protector rod, thus rotating said protector rod
against the action of the spring means aforemen
In this manner the load on the spring
means is carried directly by the shuttle, the binder
?nger, the shuttle box, and associated parts and
30 the daggers are thus prevented from striking the
‘steels in the frogs and stopping‘ the loom. In case,
however, the shuttle should fail to enter either
box it will be seen that there will be nothing to
prevent the spring means aforementioned from
c. Ci rotating the protector rod and the dagger or dag
gers attached thereto into the position of protec
,tion thus stopping the lay and preventing a so
called smash or breakout.
It will also be obvious and, in fact, has long been
~20 obvious to those skilled in the art that the conven
tional form of mechanism which has just been"de-_
'scribed although effective and reliable is far from
being either practical or ef?cient.
In the ?rst place in this particular mechanism
15 we have presented the peculiar’ mechanical situ
ation wherein certain elements which have con
.siderable weight, friction, and inertia are caused
to oscillate 10,000 or more times per hour in’ order
that they may be of use perhaps once a week.
ing unlubricated parts, i. e. the shuttle, the shuttle
box, and the binder. In fact the power loss due
to the present form of operation is so high that
veven the simple mechanism which forms the sub‘
Ject matter of this application and which acts so‘
‘Furthermore in order to overpower the action of
the protector rod spring it'is necessary for the
shuttle to move into and outv of a so called tight
box thus causing a large increase in power con
> esumption not to mention the excessive wear re
,55 sulting from the tight contact between fast mov
and tear on said parts. Although the invention,
which may incidently be attached to any conven?‘
tional form of loom or made an integral part of
a loom, does prevent or reduce the motion of the
various parts of the loom just referred to and also
relieves the shuttle of all spring load except dur
ing that portion of the beat when the shuttle is *
idle and in stationary position, as will be herein
after explained, it should not be assumed that
failure of the shuttle to enter either box will not
instantly allow the spring means aforementioned
to rotate the‘daggers into, the position of protec
tion thus stopping the lay and preventing a smash.
Referring now to the drawings which form a
part of this application and in which like charac
ters of reference refer to like parts throughout
the several views.
Fig. 1 is a broken away perspective view of the
preferred embodiment of the invention showing a
portion of the protector rod and associated units
of a conventional form of loom and showing the
invention which forms the subject matter of this 40
application in place thereon.
Fig. 2 is a sectional elevation of the preferred
embodiment of the invention in place on a loom.
This section is taken along the line 2-2 of Fig. 1.
In this View the position of the daggers and as
sociated parts when the shuttle fails to enter the
box and when the lay is in the forward position
is indicated by the dotted lines.
Fig. 3 is a sectional elevation of the preferred
embodiment of the invention in place on a loom.
This section is taken along the same lines as those
indicated in Fig. 2.
In this view the lay is shown
in its forward position but with the shuttle in the
box and with the daggers clear of the steels.
Fig. 4 is a side view of the preferred embodi 55
ment of the invention showing in this case the
form which the pitman arm ?tting must have
in order to clear certain parts of the lay.
Fig. 5 is a front View of the special form of
pitman arm ?tting which is shown in side View
in Fig. 4.
it is mounted ahead of the pitman arm pivot
axis (|'|). When the roller (2|) is in its low
position it will press down on the protector rod
Fig. 6 is a diagram which shows the motion
of the end of the pitman arm ?tting with re
(3) is carried by the contact member (22), the
special extension lever (l9) the pitman arm (4),
spect to the lay during one beat of the lay.
and its associated ?ttings, in this manner, it
will be obvious that the binder ?nger (9) and 10
10 This diagram is included in order that the op
eration of the device may be more readily un-v
Fig. '7 is a side view of a further modi?ed form
of the invention showing in this case a roller
15 on the end of the protector rod ?tting.
Throughout the several views only so much of
the loom is shown as will enable one skilled in
the art to imderstand the location and opera
tion of the invention.
Referring now to the characters of reference
(I) refers to‘ the lay of the loom, (2) to the
protector rod, (3) to the protector rod spring,
(4) to the pitman arm, (5) to the sword, ((5) to
the dagger, ('I) to the shuttle box, (8) to the
25 shuttle box binder, (9) to the binder ?nger,
(ID) to the picker stick, and (H) to the side
frame of the loom. The frog which is adapted
to be struck by the dagger whenever the shut
tle is not in its box is indicated by the numeral
30 (|2). The crank arm which actuates the lay
is indicated by (l3) , the bearing which supports
the pitman arm is indicated by (M), and the
collar which receives one end of the protector
rod spring and which is fastened onto the pro
35 tector rod is indicated by the numeral (l5).
The pitman arm is mounted in the forked yoke
(l6), which is attached to the back of the lay
(I) just above sword (5), by means of the pin
(II) which is mounted in the bearings (Ill).
40 The various parts which have just been referred
to and indicated by the numerals from | to I‘!
inclusive are conventional in every respect both
as regards their construction and location, but
not in all cases as regards their mode of opera
45 tion as will be hereinafter explained. Mounted
on the pitman arm (4) and attached thereto by
a bolt or other suitable ?tting (l8) which is
preferably so disposed as to permit a longitudi
nal adjustment is an arm or lever (l9). When
50 used on the conventional form of loom it is
usually necessary to bend, form, or otherwise
displace the forward portion of this lever as
shown in Figs. 4 and 5 so that it will pass to
one side of the forked yoke (l6) which is mount
55 ed on the back of the lay and adapted to receive
the forward end of the pitman arm. It is also
desirable, although not always essential, to so
form the member (l9) that its forward portion
is located at a lower level than the top surface
60 of the pitman arm to which it is attached. In
the preferred embodiment of the invention as
illustrated in Figs. 1, 2, 3, 4, and 5, the forward
end of the member (:9) is supplied with a pin
(20) upon which a roller (2|) is mounted in
65 any suitable manner, the pin (26) is so disposed
that its axis is forward of the axis of the pin
(H) which supports the forward end of the
pitman arm.
The operation of the invention can be best
70 understood by referring to Figs. 2, 3, and 6. In
these ?gures it will be seen that during that
portion of the stroke when the crank arm is in
the ?rst and second quadrants, i. e. above the
horizontal, and the lay is moving backward, that
75 the roller (2| ) will be in its lowest position since
contact ?tting (22), which is an important unit
of the invention and thus will carry the load
of the spring (3). When the load of the spring
the binder (8) will be relieved of all load and
the shuttle which normally picks during this
phase of the loom cycle can enter and leave a
so called free box. During the extreme forward
portion of the stroke, however, when the crank
(i3) is just leaving quadrant} and passing into
quadrant 3 and also during the entire forward ,
stroke the roller. (2|) will be elevated slightly
which will allow the spring (3) to rotate the
protector rod (2) and press the binder ?nger 20
(9) against the binder (8). During this phase
of the cycle the load of the spring (3) will be
carried by the shuttle (23), the binder (8), and
the side of the shuttle box (24), as will be seen
be reference to Fig. 3. If the shuttle should, 25
however, for any reason fail to be in its box
during this phase of the loom cycle, a condition
illustrated by the dotted outline shown in Fig.
2, then the spring (3) will be unsupported and
will rotate the protector rod (2) through a small 30
angle thus depressing the dagger (6) which will
strike the frog (l2) and stop the loom through
the medium of the conventional smash pro
tection mechanism (not shown).
In actual practise it is usually desirable to
form a special contour on the surface of the
contact ?tting (22) thus improving the opera
tion of the invention and prolonging the life
of the various parts. It will be obvious to those
skilled in the loom art that the roller (2|) could 40
be mounted on the contact ?tting (22) without
affecting the operation or departing from the
spirit of the invention in any way, and such a
form of construction is illustrated in Fig. 7. In
fact by suitably shaping the parts (l9) and (22) ,
the roller (2|) can be dispensed with entirely
and such a form of construction was actually
used during the early stages of the development
of the invention. In this case, however, a cer
tain amount of sliding friction is bound to occur
even when the parts (I 9) and (22) are very
carefully shaped and for this reason the entire
omission of the roller is not recommended.
It will be seen from the foregoing disclosure
that I have invented a simple and practical de
vice which will materially reduce the wear and
pressure on certain of the major units of a
loom and will also reduce the power required to
operate the loom.
Having therefore fully dis
closed my invention and the best mode of put
ting it into practise, I claim broadly as follows:
In combination with the lay of a loom, a shut
tle, a shuttle box, a dagger, and frogs adapted
to be struck by the dagger to stop the lay, a
binder and a binder ?nger, a protector rod and
a protector rod spring, adapted to operate said
binder ?nger and said dagger, a pitman arm
pivoted to said lay and a crank to impart to
said lay, by means of said pitman arm, a fore
and aft motion, means for holding the binder
?nger clear of the binder, against the action of
the protector rod spring, during the time that
the shuttle is in motion across the lay but not
during the forward stroke of the lay, means
adapted to allow the protector rod spring to
move the dagger into engagement with the frog
for stopping the lay in case a shuttle should fail
to be properly boxed, said means comprising an
extension arm, mounted on the pitman arm, a
contact member mounted on the protector rod
and so disposed with respect thereto that during
a portion of the backward stroke of the lay the
end of the pitman arm extension member will
depress the contact arm against the action of
the protector rod spring thereby relieving the
binder ?nger, the binder, and the shuttle of the
load of the protector rod spring and allowing
the shuttle to enter and leave a free box.
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