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Патент USA US2408637

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Oct. 1,1946.
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waHAMm'oN
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__2,408,636'
PICKER STICK CHECKING MECHANISM
Original Filed May 13., 1944
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‘2 Sheéts~Sheet 1
INVENTOR.
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WALLACE HAMILTON
BY'.M%M
ATTORNEY
Oct. 1, 1946.
, w_ HAMlLToN
2,408,636
PICKER STICK CHECKING MECHANISM
Original Filed May 13, 1944
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FIG 6
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BY
4 INVENTOR.
WALLACE HAMILTON
ATTOR NEY
2,408,636
Patented Oct. 1, 1946
UNITED STATES PATENT OFFICE
PICKER STICK CHECKING MECHANISlVfv
Wallace ‘Hamilton, ‘Albany, N. Y., assignor to.
Draper Corporation, Hopedale, Mass, a corpo
ration of Maine
Re?led for abandoned application Serial'No.
535,420, May 13, 1944. This application May
7 31, 1945, Serial No. 596,832
~ reclaims‘. (01. 139-165)"
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struction shown in Fig. 1;
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Fig. 3 is a sectional view taken along the vline
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‘ This. application,.-is re-?led for applicant’s
abandoned application, . Serial No. 535,420, ?led
May 13, 1944.
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. Fig.2,is a view in rear elevation of the ,con
ing-mechanisms for ?y shuttle-looms and, as illus
trated herein, relates more particularly to picker
stick checking mechanisms.v
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sition of the parts when a shuttle is in the box;
, The present invention relates generally to pick
III—.III ofv Fig. 1;
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Fig. 4 is a view similar to Fig. 1 but showing
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, Prioirgpickerstick checking mechanisms gen
erallynincluded a singlerelatively wide looped
check;_strap which passes between spaced offset 10
friction fingers which are effective to retard the
position of the parts as the picker stick is re.
turning to the position shown in Figs. 1 and 2;
Fig. 5 is a view in section taken along the line
V—,V of Fig.4;
and
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Fig. 6.is a section taken along the linev VI-VI
of Fig. 4..
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strapiwhenrthe strap is moved by the picker stick
. The drawings showonlya part, of a loom to
as the?pickerstick approaches the, limit of its
oscillation. The_picker stick moves at-a high I which the present invention may be applied.
rate of speed and thus when it engages the single 15 The parts of the loom, which‘ are neither shown
nor described, are of usualconstruction and they
wide‘ loop of prior vconstructions an excessive
form now partof the present invention. The
drawings show aportion or the left hand end of
braking orrretarding force is applied to the picker
‘stick.’ This is objectionable. since. it produces
excessive wearonthe parts and in some instances
results in Vbreakingof the, picker stick,
the usual laybeam l0 and a picker stick l2. The
usuallshuttle box and shuttle are‘not, shown since
the‘ construction and operation of these parts is
. Flirt . ermore, the sudden strainimposedon the
not necessary to 'a full understandingvof the prese
check strap results ultimately in so weakening the
strap: that iitmayvbreakh ,It is necessary, there
fore, to__provid_e a_relatively heavyand conse
ent invention. The picker stick [2 is swung back
and forth inthe'usual mannerina slot 14 formed
quently expensive strap to provide a strap which 25
will last for a reasonably’ long period of usewith
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'‘ Qn'e object‘ of the present invention is to pro
vide 'a checkby the use of which, the above ob
jectidns will beovercome.__ To this end, and in ac
cordance ‘with one feature .of the invention, a
check‘strap has‘ been provided which is, secured
'be'neath'vthe lay, and which‘ provides. ianplu'rality
of'helically wound loops whichwaresuccessively
intheleylw»
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.The friction devices for supporting and check
ing the movement of a check strap l6 are mount¢
ed ongopposite sidesof the lay H1. The friction
devices include a bracket it having a portion 20
.30 under the: lay and“ ?tting against ‘the, bottom
thereof and an upwardly'hextending ?ange 22
?tting against the rear side of the lay. The
bracket I8'is secured to the lay It by bolts 24
extending through slots (not shown) in the por
engaged by the picker stick thus progressively ape " ‘ tionz?. A The portion 20 of the bracket [8 is pro-_
plying agradually increasing,retardingforce to
the" picker stick. ‘Such a construction avoids the
necessity'for using an excessively thick strap and
'thus reduces the cost thereof; The villustrated
vided with a'dependin‘g friction ?nger 26 ‘which
a‘ plurality ‘of loops ‘about the picker stick, the
ends of the strap being anchored'on' opposite sides
which one end of the check strap I6 is secured'by
particular reference to the accompanying draw- >
gers 42, M which engage the outer face of the
‘check strap l6 and between’ which the friction
?nger 26 is located. The‘ bracket 40 is arranged
to be adjusted forwardly and rearwardly of the
strap is relatively long and narrow andcomprises
is provided with a rounded surface ‘arranged to I
engage'the inner surface of the check strap IS.
The portion 20 is‘also provided with a second de
pending member 28 to the lower end portion of
means of a'capscrew‘3il. The ?ange _22 is pro
vided with a rearwardly extending ledge 32 hav
of the picker stick.‘ By the use of a plurality of
ing a rearwardly extending slot 34 therein.
‘loops, vsubstantially ‘equalforce is applied to each
‘side of the picker stick and'thus ‘causes the‘picker :45 ‘The ledge 32 in its bottom face is provided with
'a forwardly'and rearwardly extending groove _36
"stick to travel in the center of the slot‘in the lay
which ‘forms a way fora rib 38 formed on the
as the picker is being checked. f
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upper surface of a'bracket 40. The bracket 40
With the‘above'andother objects and features
is provide‘d'with a pair of depending‘ friction ?n
in view; the invention'iwill'riow be described" with
.ings which illustrate a ‘preferred embodiment
thereofand in which:'
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-' ~~Figx1 is a‘ view in front elevation of the left
hand’ end of- a lay having a preferred‘emb'odiment
of the invention appliedthereto showing the po
lay ID to increase or decrease'the sinuous course
of the ‘check strap between'the three friction
2,408,636
4
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?ngers 26, 42 and 44. The bracket 40 is provided
with a slot 46 which is aligned with the slot 34
in the ledge 32. A bolt 4d passes through both
slots and permits adjustment of the bracket 60.
A look nut 59 looks the parts in adjusted posi
tion.
portions of the strap. Thus when the strap is
moved when the picker stick approaches the in
ner limit of its movement, the resistance of the
loop 92 will be somewhat less and hence it is
moved more easily. The resistance of the loops
9%] and 94 is substantially greater and hence these
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a similar strap supporting and checking mecha
loops will be moved inwardly a somewhat lesser _
distance.
nism and includes a bracket 52, having a portion
The upper and lower loops 90 and S4, respec
The front side of the lay i0 is also provided with
54 extending beneath and ?tting against the bot ll) tively, are effective to maintain the picker stick
i2 centered in the slot I4. The upper loop 90
tom of the lay and an upwardly extending flange
tends to pull the stick toward the rear while the
56 ?tting against the front side of the lay. The
lower loop tends to pull the stick forwardly.
bracket 52 is provided with a forwardly extend
Since the intermediate loop 92 moves bodily out
ing shelf or ledge 58 having a slot 60 therein for
receiving a clamping bolt 62.
The bracket 52 is 15 wardly and hence imparts no turning movement
securely bolted to the lay Ii] by suitable bolts 64,
66.
to the picker stick, the opposed forces will offset
or equalize each other and the picker stick will
remain centered in the slot I4 in the lay. The
The bracket 52 is provided with a depending
present construction, therefore, presents the ad
friction ?nger 68 having a rounded portion for
engaging the inner surface of the check strap Hi. 20 vantages of a circular check strap without the
necessity of dismantling the picker stick and par
The bracket 52 is also provided with a second de
allel shoe when it is desired to replace a broken
pending member or ?nger it to the upper end
check.
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portion of which the other end of the check strap
Having thus described a preferred embodiment
I6 is secured by a cap screw 12.
of my invention, what I claim as new and desire
The lower surface of the bracket 52 is provided
to secure by Letters Patent of the United States
with a groove ‘M which acts as a way for an up
1s:
standing rib 15 formed on the upper surface of
1. A check for a picker stick including front
a bracket 18. The bracket 18 is provided with a
and rear brackets ?xed to a lay and having de
pair of depending friction ?ngers 8D, 82 which
pending friction ?ngers, and a ?exible strap ?xed
are disposed at either side of the ?nger E8 and
at each end to said brackets and helically thread
are each provided with a rounded surface ar
ed between said ?ngers to form a plurality of
ranged to engage the outer surface of the strap
loops arranged to be progressively engaged by
I6. The bracket 18 is adjustable forwardly and
the picker stick as it approaches each limit of
rearwardly of the lay to change the location of
the ?ngers 80, 82 and thus increase or decrease 35 movement to check said stick.
2. A check for a picker stick including front
the sinuous course of the check strap IE5.
and rear brackets ?xed to a lay, depending fric
The check strap l5, as previously stated, is se
cured at one end to the ?nger 10 of the bracket
tion ?ngers on each of said brackets, and a flex
52 by the cap screw 12. The strap then is passed
ible strap ?xed at one end to said front bracket
rearwardly behind the ?nger 28, forwardly of 40 and at its other end to said rear bracket and heli
the ?ngers 42, M and rearwardly of the ?nger 26.
cally threaded between said ?ngers on said front
The strap then passes forwardly behind the ?n
and rear brackets to form a plurality of integral
gers 82, 80 and in front of the ?ngers 63, ‘Hi.
helical loops about said picker stick to progres
This portion of the strap is marked A--A in Figs. 45 sively check movement of said picker stick as it
1 and 4 of the drawings. The strap then passes
approaches each limit of its movement.
rearwardly behind the ?nger 28, forwardly of the
3. A check for a picker stick including front and
?ngers 42, 44 and rearwardly of the ?nger 25.
rear brackets ?xed to a lay, depending friction
This portion of the strap is marked B—B in Fig.
?ngers on each of said brackets, and a ?exible
2 of the drawings. The strap then passes for 50 strap ?xed at each end to said brackets and
wardly behind the ?ngers B2, 84 and in front of
threaded between said ?ngers helically in succes
the ?ngers 68, ‘m. The strap then passes rear
sive vertical loops in edge-to-edge relationship,
wardly and the end portion is secured to the
said loops being arranged to be progressively en
lower portion of the ?nger 28 by the cap screw
gaged by the picker stick to check said picker
30. Thus, the check strap is is wound helically 55 stick as it approaches either limit of its move
ment.
between the friction ?ngers and about the picker
4. A picker stick check of the type including
It is desirable progressively to increase the
front and rear brackets ?xed to a lay, depending
checking action of the check strap I 5 and the
friction ?ngers on each of said brackets, said
strap is designed to produce this result. Refer an ?ngers being relieved slightly adjacent to their
ring now to Fig. 4, it will be noted that the upper
mid portions, and a long narrow ?exible strap
loop 90 of the check strap [6 is located near the
?xed at one end to said front bracket and at its
outer end of the lay. The loop 92 is located near
other end to said rear bracket and helically
er the picker stick while the lower loop 94 occu
threaded between said ?ngers to form a plurality
pies an intermediate position. Thus when the 65 of loops arranged to be progressively engaged
picker stick I2 is moved outwardly by engagement
by the picker stick as it approaches either limit
with an incoming shuttle, the picker stick will
of its movement.
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successively engage the loops 92, 94 and Bil. thus
5. A picker stick check of the type including
increasing the retarding effect of the strap as
front and rear brackets ?xed to the bottom of
the picker stick approaches the outer limit of its 70 a lay on opposite sides of the picker stick slot,
movement. To insure that the loop 92 will be
stationary and adjustable depending friction ?n
engaged ?rst, the portions of the friction ?ngers
gers on each of said brackets and a long narrow
engaging the portions A~A and 28-13 are slight
flexible strap ?xed at one end to said front
ly relieved so that the friction on these portions
bracket and at its other end to said rear bracket,
of the strap are slightly less than on the other
said strap being helically threaded between said
~ stick l2.
2,408,686
5
?ngers to form a plurality of loops of different
length arranged to be engaged progressively by
the picker stick as it approaches either limit of
its movement to check said stick, said ?ngers
being arranged to offer less frictional resistance
to movement of one of said loops than to move
ment of other of said loops, for the purpose de
?ngers on each of said brackets, said ?ngers hav
ing slightly relieved portions, and a ?exible strap
?xed at one end to said front bracket and at its
other end to said rear bracket, said strap being
helically threaded between said ?ngers to pro
vide a plurality of loops each of di?erent length
and said relieved portions providing different re
sistance to movement of different of said loops by
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said picker stick whereby increasingly greater re
6. A picker stick check of the type including 10 sistance will be applied to said picker stick as it
front and rear brackets ?xed to the bottom of a
reaches either limit of its movement.
lay on opposite sides of a picker stick slot there
WALLACE HAMILTON.
'in, stationary and adjustable depending friction
scribed.
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