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Патент USA US2120199

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June 7,1938.
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‘H. H. BURDETT
‘
-
2,120,199
LOOM
Filed Aug. 20, 1957
2 Sheets-Sheet '1
INVENTOR. .
HoEA CE h’. 505215771
BY
ATTORNEY.
June 7, 1938.
H. H. BURDET'II"
2,120,199
LOOM
Filed Aug. 20, 1937
a “uh-"HT:
2 Sheets-Sheet 2
" %
/
2/
35'
\
ATTORNEY.
_
Patented June 7, 1938
_ 2,120,199
UNlTED STATES PATENT OFFICE
2,120,199
LOOM
Horace H. Burdett, Hopedale, Mass, assignor to
Draper Corporation, Hopedale, Mass., a corpo
ration of Maine
Application August 20, 1937, Serial No. 160,117
1 Claim.
(Cl. 139—162)
The present invention pertains to ?y shuttle
looms, and more particularly to picker checks
for such looms.
Looms of the type to which my invention ap
5 plies include a forwardly and rearwardly recip
rocating lay having a shuttle box, a picker actu
ated to pick a shuttle out of the shuttle box, and
picker check means for checking the picker and
shuttle when the latter returns to the shuttle
10 box. Usually, the picker is ?xed to or engaged
by a picker stick and the check means acts on
such picker stick. In prior looms of this type,
the construction is such that the picker, picker
stick, and check element are stationary (except
15 for forward movement with the lay) when the
returning shuttle strikes the picker, and the shut
tle cannot fully enter the shuttle box unless it
possesses appreciably more kinetic energy than
is necessary to set the picker, picker stick, and
20 check element in motion.
I propose to provide a ?y shuttle loom having
a reciprocating lay, shuttle box, shuttle, and
picker as aforesaid, a picker check element for
checking outward movement of the picker and
25 shuttle when the latter enters the shuttle box,
and means, other than the shuttle, for imparting
outward motion to the picker and check element
just before the picker is engaged by the boxing
shuttle, whereby the shuttle is not required to
30 possess as much kinetic energy as in the afore
said prior construction.
The foregoing and other objects of the inven
tion are accomplished in the construction illus
trated on the accompanying drawings, of which:
Fig. 1 is a perspective view of one side of a
loom having the preferred embodiment of my
invention applied thereto;
Fig. 2 is a side view of the same;
Fig. 3 is a plan View, partly in section, showing
the mechanism of Fig. 1 with the lay forward;
and
Fig. 4 is a view similar to Fig. 3 but showing
the lay in its extreme rearward position.
The drawings show only part of a loom hav
45 ing my invention applied thereto, parts and
mechanisms not shown being of usual construc
tion well known in the art. It is noted, however,
that the complete loom includes a pick motion
and picker stick check at each side of the loom
50 and while both such picker stick checks may be
constructed in accordance with my invention only
one of them is shown and described.
The loom frame includes a right hand loom side
I. The lay includes a lay beam 2 which extends
55 widthwise of the loom and is reciprocated to
ward and from the front of the loom in the usual
A shuttle box is provided at each side
of the loom, of which the drawings show the
right hand shuttle box 3 carried by the lay. A
shuttle 4' is adapted to be picked back and forth 5
along the lay, into and out of the shuttle boxes.
The shuttle is thus picked by suitable pickers
such as the picker 5 which is ?xed on the upper
end of a picker stick 6. The picker stick has a
shoe 1 which rocks on a parallel 8. The picker 10
manner.
stick rocks or moves in an inward, direction,
which is toward the center of the loom to pick
the shuttle out of the shuttle box 3 toward the
other side of the loom. Means for imparting in
ward or picking movement to the picker stick and 15
picker may include a pick arm 9 and lug strap Ill.
The parts as thus far described in detail are of
usual construction and are of the present in
vention only in that they may cooperate with
other parts, hereinafter described, to form a com 20
plete operative combination. A similar or any
suitable picking motion
other side of the loom.
out of the shuttle box
rearwardly and arrives
may be provided at the
The shuttle 4' is picked
3 as the lay is moving
at the other side of the
loom as the lay moves forwardly. In the case of
a single shuttle loom, the shuttle 4 will return to
the shuttle box 3 on the next succeeding forward
beat of the lay, as is well known in the art. The
picker stick is commonly positioned so that the
returning shuttle strikes the picker when the
shuttle is only partly entered into the shuttle
box. Thus, the picker and picker stick are
moved outwardly by the returning shuttle and
picker check means are provided for checking 35
the picker and picker stick and assisting in
checking the shuttle.
The preferred embodiment of the invention in
cludes a novel picker check means constructed
and arranged to position the picker 5 and picker
stick 6 much farther inwardly of the loom, prior
to the boxing of the returning shuttle, than has
been the practice heretofore. Such check means
is further arranged to set the picker stick and
movable parts of the check into motion in an out 45
ward direction just before the returning shuttle
engages the picker.
In the said preferred embodiment, a picker
stick check element II is arranged to be moved
outwardly of the loom by the picker stick 6 in
checking the picker stick and shuttle. To this
end the element ll may comprise an- arm I3
which is pivotally mounted on a stud l2 and
which has a free end extending forwardly and en
gaging the outer side of the picker stick 6.
The
2
2,120,199
stud I2 is ?xed in a bracket I 4 which is bolted to
the lay and extends rearwardly therefrom. A
conventional form of heel spring I5 (Fig. 1) is
connected to the picker stick by a strap I6. The
heel spring and strap comprise means for yield
ingly urging the picker stick outwardly against
the free end of the arm I3.
The element II is extended rearwardly beyond
the stud I2 and the rearwardly extending por
10 tion is provided with an arcuate slot IT.
A cam
follower member I8 is pivotally supported on the
stud I2 below the element II and includes a down
wardly extending cam follower I9. A rod 20 is
?xed in the member I8 and extends upwardly
15 through the slot IT.
A coiled compression spring
2| on the rod 20 pushes the element II down
wardly into frictional engagement with the up
per face of the member I8. The cam follower is
thus frictionally connected with the arm I3. The
20 frictional connection is suf?ciently strong to
cause the arm I3 to be moved by the cam follower
but will permit the arm to move relative to the
cam follower as will hereinafter appear.
The arm I3 is moved by cam means, prefer
25 ably consisting of a stationary cam 22 which has
a cam track in which the follower I9 runs. The
cam 22 is ?xed to a bracket 23 which is carried
by the loom side I. The front portion 24 of the
cam track extends forwardly and rearwardly of
the loom while the back portion 25 thereof curves
rearwardly and outwardly. Since the lay, check
element II and cam follower member I8 recip
rocate forwardly and rearwardly while the cam
22 remains stationary, the cam will cause the arm
I3 to swing inwardly as the lay moves back, and
outwardly as the lay moves forwardly.
In the embodiment shown, the arm I3 swings
’ inwardly and outwardly each time the lay makes
one complete cycle of movement, but is called
40 upon to perform its checking function only upon
alternate forward beats of the lay. Starting with
the lay at its extreme forward position and with
the shuttle 4 in the shuttle box 3, the lay then
moves rearwardly and the picking means 9, II]
operates to move the picker stick 6 inwardly
when the lay is about half way back. Simulta
neously with the inward movement of the picker
stick, and as the lay continues its rearward move
ment, cam 22 moves the cam follower I9 out—
wardly, thereby swinging the arm I3 inwardly
with the picker stick. Then, as the lay moves
forwardly the arm I3 will move outwardly and
the spring means I5, I6 causes the picker stick
to follow the arm, the shuttle being at the other
55 side of the loom.
When the lay next moves rearwardly the shut
tle 4 will still be absent from the shuttle box 3
and the picking means 9, II) will not operate.
The cam 22 will, however, swing the arm I3 in
60 wardly, and the latter will move the picker stick,
as the lay moves rearwardly. This places the
arm and picker stick substantially at their inner
most positions. The shuttle 4 is then due to re
turn to the shuttle box 3 shortly after the lay
starts its next forward movement. At the be
ginning of such forward movement of the lay
the cam 22 imparts outward motion to the arm
I3, and the spring means I5, I6 causes the
picker stick to move outwardly with the arm.
‘Thus, the picker 5, picker stick 6, and arm I3
are set in motion in an outward direction just
prior to or in advance of the time when the re
turning shuttle engages the picker 5. The in
itial speed of these parts is preferably equal to 10
or slightly less than the speed of the returning
shuttle, and is thereafter reduced, to check the
picker stick and shuttle.
The setting of the picker stick 6 and picker
stick check arm I3 in motion in an outward 15
direction prior to the time of engagement of the
returning shuttle with the picker relieves the
shuttle of the burden of setting these parts in
motion.
The results are a more uniform and
reliable checking of the shuttle and picker stick, 20
a reduction in the possibility of “bang-off’” due
to a weak pick, and some saving in the power
required to pick the shuttle across the loom and
into the shuttle box.
It may happen that, because of improper set 25
ting of the pick motion or for other reasons, the
shuttle will enter the shuttle box at much greater
velocity than the velocity of the outward move
ment of the picker permitted by the cam 22. In
this case, the frictional connection between the 30
cam follower member I8 and the arm I3 will
yield, to permit the picker stick 6 and arm I3
to be moved by the picker stick independently
of the cam follower. Outward movement of the
arm I3 is limited by a stop 26 which is formed
integrally with the bracket l4 and projects down
wardly beside the rearward extension on the
arm as shown more clearly on Fig. 3.
After the
arm I3 has been moved outwardly to the posi
tion determined by the stop 26, but on the same 40
forward beat of the lay, the cam 22 will con
tinue to swing the cam follower I9 inwardly,
thereby restoring proper angular relation be
tween the cam follower member I3 and the arm.
An adjusting screw 21 carried by the member I8 45
engages the rearward extension on check ele
ment II to adjust the check element relative to
the cam 22.
I
Having fully disclosed the preferred embodi
ment of my invention, I claim:
50
In a fly shuttle loom, a forwardly and rear
wardly reciprocating lay, a picker stick, means
imparting inward picking movement to said pick
er stick as the lay moves rearwardly, a picker
stick check comprising a pivoted arm having a 55
free end engaging the outer side of said picker
stick, a cam follower, means frictionally connect
ing said arm with said cam follower, and cam
means engaging said cam follower for swinging
said arm inwardly as the lay moves back and 60
outwardly as the lay moves forwardly, said fric
tional connection yielding to permit said arm to
be moved outwardly by said picker stick.
HORACE H. BURDETT.
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