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Патент USA US2355540

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Aug- 8, 1944-
LE ROY LAYTON ET AL
2,355,540
PICKER MOTION FOR LOOMS‘
Filed June 4, 19212
2 Sheets-Sheet l
Aug~ 8, 1944-
LE ROY L‘AYTON ET AL
2,355,540
PICKER MOTION FOR LOOMS
Filed June 4, 194.2
2 Sheets-Sheet 2
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Patented Aug. 8, 1944
UNITED STATES ‘PATENT. ‘OFFICE
2,355,540
’
'
PICKER MOTION FOR LOOMS
Le Roy Layton, Lansdowne, and Edward W.
Shertz, Upper Darby, Pa., assignors to Lans
downe Steel & Iron Company, Morton, Pa., a
corporation of Pennsylvania
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Application June'4, 1942, Serial No. 445,799
11 Claims.
This invention relates to the picker mecha
nism of looms, and more particularly to looms
of the wider, heavier types used in the weaving
~of broad-loom carpets and wide rugs, etc.
More speci?cally, the present invention relates
to a new, novel and improved motivating means
(Cl. 139-144)
pet looms, i. e., looms ‘making carpet or rugs
up to 18 feet in width. '
These picker springs are usually of the ten
sion type, made of round spring steel stock about
1/2 to 5/," in diameter, with the coils about 4"
in outside diameter and frequently from six to
eight feet in length.
The springs are normally stretched between
for rapidly driving a weft-carrying shuttle from
a 'shuttle~box at one side of the loom, through
the open warp shed in the loom, and into the
two picker strap levers I, I, to which the picker
shuttle-box at the opposite side of the loom, 10 straps 2,2 are respectively connected at the up
which, prior to the present invention, has been
per end of each, while the second end of each
accomplished, in most cases, by one or more
picker strap is secured to a picker stick 3, which,
heavy metal springs.
,
The heavy steel springs normally employed
for actuating the picker sticks rapidly become
crystallized and break.
These springs arev ex
pensive and at the present time replacements are I
dif?cult, if not impossible, to obtain.
.
The present invention involves the use of
through the usual picker carried thereby, strikes
and drives the shuttle out of the shuttle box 4
at one side of the loom, across the loom through
the open warp shed, into the shuttlebox at the
opposite side of the loom.
The levers, I, I are normally rocked, alter
nately, in one direction by‘ the springs, supra,
pneumatic cylinders and complementary pis 20 and in the opposite direction by setting levers
tons, etc., operable by elastic ?uid trapped in
5, 5 respectively which engage the strap levers
one end of the cylinder, between the cylinder
,I, I, and normally place the picker spring or
head and the side of the piston facing said
springs under tension or compression, as the
head, at all times during the reciprocation of
case may be, depending upon the picker mecha
the piston within the cylinder.
, 25 nism of the particular loom involved.
The trapped elastic ?uid is maintained at a
The setting levers 5, 5 are connected to each
predetermined minimum pressure with the pis
other by a link 6, and to a crank ‘I by a link
ton in, its remotely situated position with respect
8, through which said levers receive their rock
to the cylinder head, attained as a result of the
ing motion. As each setting lever, in turn, com
piston having snapped its associated picker stick 30 pletes its oscillatory motion in one direction and
into action to. throw the shuttle across the loom.
moves the associated strap lever I therewith,
' The pressure of the trapped elastic ?uid is pro
a trigger 9 engages a lug II) on the strap lever I
gressively increased as the piston is reversed in
and holds it “cocked” against the tension of
the picker spring. As each setting lever 5 rocks
in the opposite direction and leaves the asso
the cylinder and approaches the cylinder head,
during the return movement of the picker stick
and the piston to “cocked” position, ready for
the next shuttle-throwing movement of the
ciated strap lever I, an arm II on the setting
lever 5, having an abutment screw I2, engages
' picker stick, at which time the pressure of the
the tail I3 of the trigger 9 and releases the strap
trapped elastic ?uid is a maximum.
lever I. The spring then rocks the strap lever
The construction and operation of the im 40 I and jerks the strap 2 which causes the picker
proved picker mechanismv will be fully disclosed,
stick 3 to hit the shuttle with a sudden hammer
in detail, hereinafter, reference being had to the
blow of su?icient force'to drive the shuttle across
accompanying drawings, of which:
the loom.
‘
'
Fig. 1 is a front elevation of su?icient of a
In the present instance, the heavy picker
45
loom to illustrate the application of the present
spring is supplanted by a ‘pair of pneumatic units
invention thereto;
.
I5,’ I5, each of which includes an air cylinder
Fig. 2 is a piping diagram; and
I
IS with a piston I‘I therein. The piston is conFig. 3 is an enlarged face view of part of the
nected to one end of a rod I8 which slides
mechanism of Fig. 1, with one of the elastic 50 through a head I9 in the irmer end of the cyl
?uid cylinders shown in longitudinal section.
inder IS. The piston rod I8 is connected to a
As previously noted, the invention resides
rear cross head 20,, by a tapered point and socket
broadly in supplanting the heavy springs com
joint 2|. The rear cross head 20 is connected,
monly‘used for operating the picker sticks which
'by rods 22, 22 to a front cross head 23 which is
throw the shuttles across the warps of wide car- 55 connected by a link 24 to the strap lever I.
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9,355,540
constant and the limits of reciprocation thereof
There is one-unit II for each picker’ stick at each
changed within the cylinder I5, it will be seen
side, of the loom. ,
that varying degrees of power may be trans
The rods 2:, .22 are slidably mounted in ‘a pair
mitted to the picker sticks, and the speed and
of brackets 26, N, which are secured to a crow
manner of operation may be ‘changed accord
, beam 2‘ of the frame of the loom and which
ingly.
also support the opposite ends of the cylinder I‘.
_ Any suitable means may be provided for chang
The outer end of each cylinder I6 is closed by
ing the operating locality of the piston within the
a head 21 to whichvis connected a pipe II for
2
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_
l
A
cylinder l5, such, for example, as interchange of
II of‘ greateror lesser lengths or by
threading’ a long piston rod and employing look
ing nuts at opposite sides respectively of the
cross head 20, through which such long threaded
building up a predetermined pressure in the
space a: between the head 21‘ and piston II. The
inner head I! of the‘cylinder II is provided'with
breather ports 29, 2! for obvious reasons.
An initial pressure of 140 pounds per square
inch, for example, is built up in the space a: by
to piston rods
rod wouldpass. ‘
,
,
an extraneous compressor through the pipe 20. I‘ We claim: .
1. A picker motion for looms, comprising a
As each strap lever l is rocked into cocked‘
closed ?uidic system including a cylinder, a pis
position, by rocking of the setting lever I in one
ton reciprocable in said cylinder, means for trap
direction to its maximum extent, the piston [1,
ping elastic ?uid in one end of said cylinder,
moving in the cylinder I‘ toward the head 21,
progressively increases the pressure in the pro 20 means for moving said piston toward said end of
the cylinder to compress said ?uid therein, means
gressively decreasing space a: to about 190 pounds.
As the setting lever B rocks in the opposite, di
rection to its maximum extent, the abutment
screw l2 in the arm ll of said lever, engages the
tail I3 of the latch or trigger 9 and releases said
for retaining said piston in its ?uid compressing '
position, and means for releasing said piston to
effect driving of a shuttle across said loom under
trigger from the lug III of the strap lever -I. This ‘
releases and permits the piston H to move rapidly
toward the head l9, thereby operating the strap
impetus of said compressed ?uid.
2. A picker motion for looms, comprising a
closed ?uidic system including a cylinder, a pis
ton reciprocable in said cylinder, means for trap
ping elastic ?uid in one end of said cylinder, an
30 axial extension on said piston projecting out
wardly beyond the opposite end of said cylinder, ,
Should any of the ?uid in the space a: leak
means engagin the outer end of said extension
around the piston and cause the pressure in the
lever l to throw the shuttle in the manner noted
above.
,
for moving sai piston toward the ?rst said end
of the cylinder to compress said ?uid therein,
space :2: to drop below ‘the initial,140 pounds per
square inch, an automatic pressure regulating
valve 30 in the line 28 will open the line 2' to 85 means for retaining said piston in its ?uid com
pressing position, and means for releasing said
the supply line 3 I, whereby the compressor which
piston to effect driving of a shuttle across said
feeds the line ll will build up the pressure again
loom under impetus of said compressed fluid.
to 140 p. s. i. in the cylinder I‘. A check valve
3. A picker motion for looms, comprising 9. cyl
32 in the line 28, between the regulating valve
Ill and the cylinder l6 holds the ?uid in the space 40 inder, a piston reciprocable in said cylinder,
>means for trapping elastic ?uid in one end of said
:2 against backing up in the line It under the high
cylinder, an axial extension on the piston pro
pressure developed in the space a: when the lever
Jecting through and out the opposite end of the
l is cooked.
cylinder, a cross-head engaged by the outer end
Assuming that the line 3| carries a pressure
greater than the initial 140 p. s. i. and less than 45 of said extension, a second cross-head beyond
the ?rst said end of the cylinder, rods connecting
the developed pressure of 190 p. s. i., it is some
said cross heads, means connected to said sec
times desirable to develop an initial pressure of
ond cross-head for moving said piston toward the
greater than 140 p. s. i. in starting up the loom
?rst said end of the cylinder to compress said
at the beginlng of a working day. This is done 3
by a by-pass 33 under a manually operated con 50 ?uid therein, means for retaining said piston in
its ?uid compressing position, and means for
trol valve to shunt the higher pressure around
releasing said piston to effect driving of a shuttle
across said loom under impetus of said com
the automatic regulating valve "which is normally set to deliver thelower pressure only to
pressed ?uid.
,
4. A picker motion for looms, comprising a
The power stroke of the piston 11, in each in; 56
cylinder, a piston reciprocable in said cylinder,
stance, is arrested, before the piston reaches the
means for trapping elastic ?uid in one end of
rear head I! of the cylinder l6 by a ?at face is
said cylinder, an axial extension on the piston
on the strap lever l engaging a resilient impact
projecting through and beyond the opposite end
dissipator 36, in the form of a rubber plug, housed
of the cylinder, a picker lever operably connected
in a cup 31 carried by a bracket 38 which is se->
the cylinder l6.
cured to the loom beam 26.
1
to the outer end of said extension, means for
The power applied to the picker sticks bytthe'
piston I‘! may be varied, if desired, by changing
the operating positions of pistons in the cylin
moving said piston toward the first said end of
the cylinder‘ to compress said ?uid therein, means
engageable with said lever foriretaining said pis
ders I5 with respect to the heads 21 of said cyl 65 ton in its ?uid compressing position, and means
inders. It will be obvious that the closer the pis
for relasing said lever to permit said piston to
ton approaches the head 21, the higher the com
e?'ect driving of a shuttle across said loom under
pression of the ?uid trapped between the piston
impetus of said compressed ?uid.
and the head, and consequently the greater the
5. A picker motion for looms, comprising a
power applied to the picker stick when the latch 70 cylinder, a piston reciprocable in said cylinder,
9 is released. Conversely, the further the piston
means for trapping elastic ?uid in one end of
is carried away from the head 21, the lower be
said cylinder, an axial extension on said piston
comes the compression of the trapped ?uid and
projecting through and beyond the opposite end
the lesser is the power applied when the latch
ofsaid cylinder, a picker le'ver operatively con
is released. With the stroke of the piston being 75 nected to the outer end of said extension, means
3
2,355,540
engageable with said lever for moving said piston
toward the ?rst said end of the cylinder to com
press said'?uid therein, means engageable with
press said ?uid, a latch engageable with said
picker lever for retaining said piston in said ?uid
compressing position, and an arm on said oscllat
ing lever engageable with said latch for releas
said lever for retaining said piston in its ?uid
compressing position, and means for releasing
ing said piston to permit the compressed ?uid
said lever to permit said piston to effect driving
to effect driving of the piston toward the oppo
of a shuttle across said loom under impetus of
site end of said cylinder and actuate said picker
said compressed ?uid.
6. A picker motion- for looms, comprising a
10. A picker motion for looms, comprising a
picker stick, a cylinder, a piston reciprocable in 10 picker stick, a picker lever connected to said
said cylinder and 'operably connected to said
picker stick, a cylinder, a piston reciprocable in
picker stick, means for trapping elastic ?uid in
said cylinder, a piston rod connected to said pis
one end of said cylinder, means for moving the , tor. ,nd extending beyond one end of said cylin
piston toward said end of said cylinder to com
' der, across-head on the outer end of said piston
press said ?uid, means for retaining said piston 15' rod, a second cross-head beyond the opposite end
in, said ?uid compressing position, and means for
of said cylinder, tie rods connecting said cross-'
releasing said piston to permit the compressed
heads, a link connecting said picker lever to
?uid to e?ect driving of the piston toward the
the second said cross-head, means for trapping
opposite end of said cylinder and actuate said
elastic ?uid in the second said end of said cylin
picker stick.
20 der between said end and said piston, an oscillat
7. A picker motion for looms, comprising a
ing lever engagable with said picker lever for
picker stick, a picker lever connected to said
moving the piston toward said second end of said
picker stick, a cylinder, a piston reciprocable
cylinder to compress said ?uid, 'a latch engage
in said cylinder and operably connected to said
able with said picker lever for retaining said
picker lever, means for trappng elastic ?uid in 25 piston in said ?uid compressing position, and an
one end of said cylinder, means engageable with
arm on said oscillating lever engageable with said
said lever for moving the piston toward said end
latch for releasing said piston to permit the com
of said cylinder to compress‘said ?uid, means en
pressed ?uid to e?ect driving of the piston toward
/ gageable with said lever for retaining said piston
the ?rst said end of said cylinder and actuate
in said ?uid compressing position, and means 30 said picker stick.
for releasing said lever to permit/the compressed
11. A picker motion for looms, comprising a
?uid to effect driving of the piston toward the
picker stick, a cylinder. a supporting bracket for
opposite end of said cylinder and actuate said
the cylinder at each end thereof, a head closing
’ picker stick.
each end of the cylinder, a piston reciprocable in
8. A picker motion for looms, comprising‘ a 35 said cylinder, a piston rod extending axially from.
picker stick, a picker lever connected~ to said
one side of the-piston through and beyond the
picker stick, a cylinder, a piston reciprocable in
head at one‘ end of the cylinder, breathing ports
said cylinder and operably connected to said
in said cylinder at said one end of the cylinder,
picker lever,»means for trapping elastic ?uid in
means for admitting elastic ?uid to said cylinder
40
one end of said cylinder, means engageable with
between the head at the opposite end thereof and
said lever for moving the piston toward said
said piston, a cross head beyond each of said
end of said cylinder to compress said ?uid, means
brackets, a pair of tie rods slidably mounted in
engageable with said lever for retaining said pis-,~
said brackets and rigidly connecting said cross
ton in said ?uid compressing position, and means
heads, means connecting one of said cross-heads,
carried by said lever engageable means for releas- , 45 means'connecting one of said cross-heads to the
ing said lever to permit the compressed ?uid to.
outer end of said piston rod, means connected
e?ect driving of the piston toward the opposite
to the other of said cross-heads for moving the
'end of said cylinder and actuate said picker
piston toward said opposite end of said cylinder,
stick.
‘
to compress said ?uid, means for retaining said
9. A picker motion for looms, comprising a 50 piston in said ?uid compressing position, and
picker stick, a picker lev'er connected to said
means for releasing said piston to permit the com
stick, a cylinder, a piston reciprocable in said
pressed ?uid to e?'ect driving of the piston to
cylinder and operably connected to said picker
ward the opposite end of said cylinder and ac
lever, means for trapping elastic ?uid in one end
_
stick.
LE ROY LAY'I'ON.
of said cylinder, a constantly oscillating lever 55 -tuate saidi picker
engageable with said picker lever for moving the
EDWARD W. SHERTZ.
piston toward said end of said cylinder to'com
stick.
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