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Патент USA US2407056

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Sept; 3, 1946';
‘ B. w. BROUWER, »
"
PIcKINé SHOE
’
“2,407,056
Filed June‘l5, 1945
FIG.‘ 1.
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I
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IN VEN TOR.»
HWWM
2,407,056
Patented Sept. 3, ‘1946
UNITED STATES PATENT OFFICE
2,407,056
PIQKIN G ‘SHOE
Benjamin W. Brouwer, Auburn, Mass, assignor to
Crompton & KnowleswLoom Works, Worcester,
Mass, a corporation ofiMassachusetts
>
Application June 15, 1945, Serial No. 599,671
5 Claims. (0!. 139-150)
2
This invention relates to improvements in pick- ‘7
IE on which is rotatably mounted a picking roll
ing mechanisms for looms and it is the general .
object of the invention to provide a picking shoe
so constructed as to facilitate checking of the
or ball [6 for engagement with a cam I 1 se
cured to a picking shaft 18. The latter is mount
ed. for rocking movement in bearings secured to
inward stroke of the picker stick and also assist
the loom frame II]. A sweep arm 19 extends up
the stick to return to its normal outward position. ‘r’ wardlyfrom shaft l8 and is attached to a sweep
In certain types of picking mechanism the bot
stick 2B, the outer end of which is connected to
tom end of the picker stick is secured to a shoe
a picker stick 2|. During loom operation shaft
which rests on a rocker iron mounted to swing
13, rotates everyvsecond pick of the loom and the roll I 6 engages the cam I’! to move the picker
stick to the left as viewed in Fig. 1 to pickshuttle
S when the lay is about at top center on its back
ward stroke.
Secured to the rocker shaft I4 is a rocker iron
25 having an upper flat surface 26 and provided
with the lay. As heretofore made the shoe has
been provided with an under surface curved '
throughout its length. As a result of this con—
struction the shoe rolls or rocks along the rocker
iron throughout the picking stroke with no ap
preciable retarding effect on the stick at the
inner end of the picking stroke.
‘
It is an important object of my present in
vention to provide the shoe with an under sur
face part of which is curved and part of which
a'
with a vertical lengthwise slot 21. A lug 28, see
Fig. 3, depends from the rocker iron and car
ries a stud 29 ‘on which is rotatably mounted
a spring drum 30 to which a strap 3! is secured.
is straight, and relate these two parts of the shoe 20 A
torsion spring 32‘ surrounding the drum tends
to the rocker iron in such a way that the straight ‘ "
normally to turn the drum in a clockwise direc
surface of the shoe engages the rocker iron near
tion as viewed in Fig. 3 and resist movement of ~
the end of the picking stroke. As a result of
the strap 3| to the right or outwardly away from
this construction the greater part of the shoe is
the loom frame.
’
lifted away from the rocker iron near the end .25
A
picking
shoe
35
rests
on
the
surface 26 ‘and
of the working stroke of the stick and sets up
has a vslot 36 through which projects a tongue
increased strains in=~the return spring which tend
31 projecting upwardly from the rocker iron 25.
to check the stick.‘ These increased strains also
The right end of’ the strap 3! is secured as at 38
hasten the outward or return movement of the
to the lower outer part of the picker stick.
stick to normal position.
A bolt 40 passes through a cleat 4|, the picker
With these and other objects in View which '5"
stick, and the upright wall 42 of the shoe 35.
will appear as the description proceeds, my in
By means of the bolt and cleat the left edge of
vention resides in the combination and arrange
the
picker stick as viewed in Fig. 3 is forced
ment of parts hereinafter described and set forth.
against an inverted .T-shaped guide 43 which
In the accompanyingdrawing, wherein a con
extends along the inside of wall 42. The lower
venient embodiment of my invention is set forth, M end of the guide 43 extends through the slot 2‘!
Fig. 1 is a front elevation of a part of the loom ' and the bottom of the guide 43 is provided with
having my invention applied thereto, and show
oppositely extending lugs 45 which can engage
ing the picker stick and shoe in the positions
they occupy at the beginning of a picking or work 40 the side walls 46 of the shoe 25 forming the sides
of slot 21. A roll 50 turns on a stud 5| extend
ing stroke,
'
'
ing between the walls 46 and the spring 32 ‘and
Fig. 2 is an enlarged horizontal section on line
strap 3| act to hold the left edge of the guide
2-2 of Fig. 1,
43 against the roll 50, see Fig. 3.
‘
Fig. 3 is an enlarged front elevation, parts in
A second bolt 52 is threaded through the wall
section, of the shoe shown in Fig. 1 but with the 45 42 and bears against the upper end of guide 43
shoe shown in that part of the picker stick stroke ‘ ‘
and,‘ together with the bolt 49, affords means
for effecting slight angular adjustments of the
where the ?at surface of the shoe engages the
rocker iron,
Figs. 4 to 7 are diagrammatic views showing the
manner in which the invention operates, and ‘
Fig. 8 is a vertical section on line 8-8 of Fig. 3.
Referring to Fig; 1, the loom frame l0, lay H,
lay sword i2, bottom shaft l3, and rocker shaft
I 4 may all be of usual construction.
The bot
tom shaft [3 has secured thereto‘a picking arm 55
‘picker stick with respect to the shoe.
'
The matter thus far described except as noted
hereinafter is of the usual construction and op
erates in‘ the usual manner except for an upward
‘movement of the picker stick accompanied by
rolling of the guide 43 along the roll 50 at the
end of the picking stroke, as will be pointed out
hereinafter.
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7
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2,407,056
3
The under surface of the shoe 35 is made in
the general form shown more particularly in
Figs. 3 to 7. The outer part of this surface may
be curved and convex with respect to the sur
face 26, but approximately at the point where
this curve reaches the picker stick or guide 43
the curved surface 6!! ends, and merges with a
4
provided simple means by which a picker stick
can be checked at the end of its inward stroke
and started back with a quick return movement
due to the fact that the under surface of the
shoe is provided with a straight surface 6 I. This
surface merges with the curved surface til at a
point 62 adjacent to the guide 43 and the picker
stick. The straight surface 6| engages the sur
straight flat surface 6|. The point of joining of
face 26 at about the time that the cam I‘! has
these curved surfaces 60 and BI, designated at
received its full motion from the picking roll l5.
10
62, will be located about as indicated in Fig. 3,
Having thus described my invention it will be
that is, at or to the right of the guide 43 and
seen that changes and modi?cations may be made
to the right of a vertical line passed through roll
therein by those skilled in the art without de
50. The straight surface 6| extends toward the
parting from the spirit and scope of the inven
loom along the left end of the surface 26, Fig. 3.
tion and I do not wish to be limited to the details
Under normal conditions preparatory to a 15
herein disclosed, but what I claim is:
picking operation the parts will be in the position
1. In picking mechanism for a loom operating
shown in Figs. 1 and 4 with the picker stick in its
with a picker stick and having a rocker iron
outermost position and with the convex curved
which oscillates with the loom lay and is provided
surface Bil in engagement with and tangent to
the surface 26. Under these conditions all of 20 with a ?at upper surface, a shoe secured to the
picker stick and resting on said ?at surface, said
the straight surface 6| will be above and out of
shoe having an under surface part of which is
contact with the top surface 26 of the rocker iron
convex and part of which is straight, and resil
25, being held in that position by the spring 32
ient means holding the shoe and picker stick
and strap 3!. As the roll l6 engages the cam
l‘! the sweep stick 20 will cause the picker stick 25 normally in such position that the convex surface
of the shoe engages the ?at surface of the rocker
2| to move to the left to propel the shuttle S to
iron and the straight part of the under surface
the opposite side of the loom.
of the shoe is above said flat surface, said ?at
During the picking stroke the shoe 35 rolls
upper surface, convex and straight surfaces being
along the rocker iron 25 and passes through the
intermediate position shown in Fig. 5. The parts 30 so related that the picker stick during the ?rst
part of a working stroke thereof causes the con
of the picking mechanism are so related that
vex surface to rock along said ?at surface and
the cam 11 will be given approximately its full
during a later part of the working stroke causes
motion by the roll it at about the time that point
the straight surface of said shoe to engage said
62 between surfaces 60 and BI engages the sur
face 26, or when the parts reach the position 35 ?at surface prior to the end of the Working
stroke of the stick, the end of said straight sur
shown in Fig. 6. At this time therefore the full
face remote from the convex surface forming a
power of the picking force has been imparted to
temporary pivot with said ?at surface near the
the shuttle and the useful working stroke of the
end of the working stroke of the picker stick to
picker stick has been completed. The picker
stick however continues to move to the left as 40 cause upward movement of the shoe relatively
to the rocker iron against the action of said re
viewed in Fig. 1 due to its momentum, but as it
silient means.
continues to move the point of contact between
2. In picking mechanism for a loom having
the surface 26 and the shoe moves rapidly to the
a picker stick which moves from the normal posi
left, or to the end of the straight surface 6| to
the point designated at a in Fig. 7. This point a 45 tion thereof on a working stroke thereof, the loom
having a rocker iron which oscillates with the
becomes the pivot around which the picker stick
loom lay and is provided with a flat upper surface,
and its shoe rocks in a counterclockwise direc
a picker shoe secured to the picker stick and hav
tion as viewed in Fig. 3 against the action of
ing a convex bottom surface extending from one
spring 32, thereby effecting a sudden applica
tion of restraining force to the picker stick which 50 end thereof toward the stick and having also a
straight surface merging with the convex surface
tends to arrest the latter and overcome its mo
extending from the other end thereof toward
mentum. When the picker stick has come to
the stick, and resilient means normally holding
rest the surfaces 6!] and BI out of contact with
the picker stick and shoe in such position that
the surface 25 except for the left end of the sur
face 6 l , and spring 32 will tend to move the picker 55 said convex surface engages said ?at surface of
the rocker iron and said straight surface is above
stick to the right as viewed in Fig. 1 to return it
said flat surface, the ?at surface of the rocker
to its normal outward position shown in Fig. 1.
iron and said convex and straight surfaces being
Because of the spring and the fact that the inner
so related that the picker stick on a working
or left end only, Fig. 3, of the shoe engages the
rocker iron, the stick tends to return rapidly from 60 stroke thereof causes the convex surface of the
shoe to roll along said flat surface of the rocker
the position shown in Fig. 7 to that shown in Fig.
iron during the ?rst part of the working stroke
6 and then continues to move through the po
of the picker stick and causes the straight part
sition shown in Fig. 5 until it reaches the posi
of said shoe thereafter to engage said flat surface
tion in Fig. 4.
During upward movement of the picker stick 65 during the remainder of the working stroke of
the picker stick and causes that end of said
when the parts move from the position in Fig. 6
straight surface remote from the picker stick to
to that shown in Fig. 7 the guide 43 moves along
form a temporary pivot with the said ?at surface
the roll 58. The guide 43 is held against the roll
to effect upward movement of the shoe relatively
55) by spring 32 throughout the entire, rocking
movement of the shoe, this rolling movement 70 to the rocker iron as the picker stick approaches
the end of its working stroke.
being down with respect to the roll 50 while the
3. In picking mechanism for a loom having a
surface Ell is rocking along the surface 26, and
picker stick which moves from the normal posi
being up when the picker shoe turns around the
tion thereof on a working ‘stroke thereof, the loom
point a as a center. —\
From the foregoing it will be seen that I have 75 having a rocker iron which oscillates with the
5
2,407,056
loom lay and is provided with a flat upper sur
face, a picking shoe secured to the picker stick
and having convex and straight under surfaces
for successive engagement with said ?at surface
during a working stroke of the picker stick, resil
ient means connected to the picker stick and nor
mally holding the shoe with the convex surface
thereof in engagement with said ?at surface, and
6
so related to said ?at surface that the convex
part rolls along said ?at surface during the ?rst
part of the operation of the picking mechanism,
said straight part thereafter engaging said ?at
surface during the latter part of the operation
of the picking mechanism and cooperating with
said resilient means and flat surface to arrest
the momentum of the picker stick.
means causing said resilient means to resistmove
5. In picking mechanism for a loom having
ment of the shoe with respect to the rocker iron 10 picking mechanism operative to move a picker
from the normal position of said shoe to a position
stick toward the center of the loom on a picking
in which the straight surface of said shoe engages
stroke, the picker stick because of the momen
said ?at surface, the picker stick on a working
tum thereof continuing to move toward the cen
stroke thereof causing said convex surface to roll
ter of the loom after completion of operation of
along said ?at surface of the rocker iron and then 15 the picking mechanism, a rocker iron located ad
cause engagement of said straight surface with
jacent to the lower end of the picker stick and
said ?at surface and thereafter causing said shoe
having a ?at upper surface, a picker shoe se
to move about a temporary pivot between the
cured to the lower end of the picker stick and
?at surface and that end of the straight surface
resting on said ?at surface, and resilient means
remote from said convex surface against the ac 20 connected to the picker stick tending to hold the
tion of said resilient means.
latter and the picking shoe in normal position
4. In picking mechanism for a loom having
preparatory to the beginning of a Working stroke
picking mechanism operative to move a picker
of the picker stick, said shoe having a convex
stick toward the center of the loom on a picking
surface which engages said ?at surface of the
stroke, the picker stick because of the momentum 25 rocker iron when the picker stick and shoe are
thereof continuing to move toward the center of
in normal position and said shoe having a
the loom after completion of operation of the
straight surface merging with the convex surface
picking mechanism, a rocker iron located adja
and adapted for engagement with said flat sur
cent to the lower end of the picker stick and hav
face near the end of a picking stroke of the picker
ing a ?at upper surface, a picker shoe secured‘to 30 stick, said picking mechanism operative to give
the picker stick and extending on opposite sides
the picker stick a working stroke and cause said
of the latter with respect to the center of the
convex surface to roll along said flat surface dur
loom, the under side of that part of the picker
ing the ?rst part of a picking stroke of the picker
shoe beyond the picker stick with reference to
stick and thereafter cause engagement of said
the center of the loom being convex and the under 35 straight surface with said flat surface, the picker
part of the picker shoe between the picker stick
stick thereafter upon completion of operation of
and the center of the loom being straight, said
the picking mechanism tending due to the mo
convex and straight parts being adapted for suc
mentum thereof to continue the working stroke,
cessive engagements with said ?at surface, and
that end of the straight surface remote from
resilient means normally holding the picker stick
the convex surface thereupon forming a tempo
and shoe in a position corresponding to the be
rary pivot with the ?at surface around which the
ginning of ‘a working stroke of the picker stick
picker shoe and stick move as a center against
with said convex part engaging said ?at surface,
the action of said resilient means.
said convex and straight parts of the shoe being
'
BENJAMIN W. BROUWER.
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