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Патент USA US2412768

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Dec.‘ 17, 1946.
J. DASHEW
‘ 2,412,768
THREAD MARKING MACHINE
Fi'led May 22, 1945
2 Sheets-Sheet 1
~* JACOB DFXSHEZW‘
Dec. 17, 1946.
'
J, DASHEW
2,412,768
THREAD MARKING MACHINE
Filed May 22, 1945
2 Sheets-Sheet 2
JACOB DAsHEW'
Patented Dec. 17, 1946
2,412,768
UNITED STATES PATENT OFFICE
2,412,768
THREAD MARKING MACHINE
Jacob Dashew, Baltimore, Md.
Application May 22, 1945, Serial No. 595,104
6 Claims. (01. 112-2)
2
This invention relates to improvements in
thread marking machines.
In the production of clothing, particularly
men’s and ladies’ suits, by the larger tailoring
provide a knotter actuating mechanism which
will insure the formation of a comparatively large
loop in the thread after it has penetrated the
stacked plies of fabric so that it is unnecessary to
reduce the cross-section of the needle to any
establishments a plurality of plies of fabric are
cut or fashioned in one operation and it is the
usual practice to mark these several plies while
material extent such as would weaken the needle
and render it more liable to fracture during the
operation of the machine.
A still further object of the present invention
still stacked one upon another with a thread eX~
tending through them, say at each point where
a button is to be attached or at the corners of 10 is to simplify the operating connections for the
pockets, and other points at which work is to be
performed on each ply after it has been sepa
rated from the others in the stack. In sepa
rating the several plies of a marked stack the
thread, which originally extends in a continuous
length through the stack, is severed between each
two thicknesses of material so that each piece of
fabric carries a short length of marking thread at
each of the points mentioned. Heretofore this
knotter mechanism in that the movements of the
rack bar through which the knotter mechanism is
operated and of the actuator slide for that rack
bar correspond to one another in the sense that
movements of the slide bar cause the rack bar to
move in corresponding directions as distinguished
from that form of operating connections where
in movement of the actuator slide in one direction
causes the rack bar to move in the opposite direc
marking thread has been placed through the 20 tion. As a result of this correspondence in the
several thicknesses of fabric by what is herein
directions of movement of the rack bar and its
termed a thread marking machine and to over
actuator slide, the number of gears used in con
come the tendency of the thread to pull through
necting these parts are reduced to a minimum.
the plies of fabric as they are removed from the
With these and other objects in View, the in- '
machine or while they are being separated from 25 vention consists in certain details of construction
one another for severing the thread between each
and combinations and arrangements of parts, all
two thicknesses, it has been the practice to tie
as will hereinafter be more fully described and
a knot in the thread underneath the lowermost
the novel features thereof particularly pointed out
ply. In some instances the knot has been tied
in the appended claims.
manually which requires the operator to slip his
hand under the stack of fabric and grasp and
tie the thread but as this manual tying of the
knot is rather tedious and increases the time fac
tor involved in the marking operation it has
also been proposed to provide a knot tying mecha
nism in the base of the marking machine which
will be automatically operated to tie the knot
iii in
In the accompanying drawings
Figure 1 is a side elevational view of the pres
ent machine with the base shown in cross-section;
Fig. 2 is a detail view showing the actuator slide
latch in side elevation but with the forward end
of said slide broken away for purposes of illustra
tion;
Fig. 3 is a top plan view of the machine base, the
after the thread-carrying needle has pierced the
base being broken away to illustrate the knotter
several plies and during the return movement of
mechanism and the connection between the rack
that needle. A thread marking machine having 40 bar which actuates the knotter and the actuator
a knotter mechanism in the base thereof oper
slide through which motion is transmitted from
able by the movement of a depressible operating
the operating lever to said rack bar;
lever which advances and retracts the thread
Fig. 4 is a horizontal sectional view on the line
carrying needle through the stack plies of fabric
4—4 of Fig. 1 looking in the direction of the arrows
is fully disclosed in the application of Robert L. 45 appearing on that section line;
Dashew, Serial No. 530,888 ?led April 13, 1944,
to which reference is hereby made for a complete
description of the construction and operation of
Fig. 5 is a horizontal sectional view on the line
5—5 of Fig. 1 looking upward or in the direction
of the arrows appearing in conjunction with that
the knot tying mechanism. In the machine
section line; and
shown in said application, Serial No. 530,888, the 50 Fig. 6 is a detail plan view of what is termed
needle is made with a reduced cross-sectional
area adjacent its point in order to insure the
knotter mechanism properly engaging in the loop
of thread carried by the needle and one of the
the loop shifter of the knotter mechanism.
As the knot tying mechanism, per se, consti~
tutes no part of the present invention it is not
disclosed in detail herein but a full. disclosure is
principal objects of the present invention is to 55 to be found in application, Serial No. 530,888,
’
2,412,768
3
above identi?ed. For the purposes of the present
4
tially withdrawn or retracted before actuator
slide 15 can be moved by spring 22, this partial
case it will su?ice to say that this knot tying
retraction of the operating lever l2 and, conse
mechanism consists essentially of a thread looper
quently, the needle I!) causing a loop to be formed
in the form of a hook H, a loop shifter S, and
a dual-jawed knotter B which normally occupy 5 in the thread in position to be engaged by the knot
tying mechanism elements. In other words, when
the positions illustrated in Fig. 3,- and which are
the operating lever I2 is depressed the needle “I,
adapted to be actuated by a reciprocatory motion
with the thread, is pushed through the fabrics
of a rack bar R which is provided with tWo rows
down into the base of the machine and when the
of rack teeth T, T’, for transmitting motion to
the before-mentioned knot tying instrumentali 10 operating lever 52 is permitted a slight retractive
movement the needle will be withdrawn a short
ties. As will be later explained, the needle I!)
distance but as the thread itself is frictionally
carrying the marking thread M (Fig. 1) is mov
held in the fabrics the thread is not Withdrawn
able by an operating lever l2 from the position
and forms a comparatively large bulge or loop
shown in Fig. 1 downwardly through a needle
opening‘ it in the base M of the marking ma 15 positioned in the path of the thread-engaging
chine, so that the thread ! i can be engaged by the
knot tying devices which are actuated by the
operating handle or lever 12, the actuating con
nections between the handle and the rack bar
R of the knot tying mechanism being that por“
tion of the machine in which the present inven
tion is embodied.
elements of the knotter.
’
To effect this delayed action of the actuator
slide it is retained or releasably held in its nor
mal position, as shown in Fig. 1, by a latch 21
pivoted at one end on a pivot pin 28 in bracket
It with its opposite end positioned in the path of
a lateral abutment 29 on the actuator slide, the
latch being held in this position by a plate spring. _
Essentially, the actuating connectionsbetween
35 secured on the undersurface of the bracket.
rack bar R and the operating lever l2 consist of
an actuator slide l5 slidably mounted on the 25 This latch 21 constitutes essentially a stop en
gageable with the actuator slide and it is
bracket 16 which overhangs the machine base,
adapted to be released by va pin 3! carried on the
this slide 85 having a depending extension l5a
operating lever in a position where, when the
whose lower end carries a rack I? which meshes
lever is depressed, said pin 3| will engage and
with a gear l8 fast on a second gear [9 which
engages the teeth 25 of rack bar R. The gears 30 depress the latch, as shown in Fig. 2. In Fig. 2
the lever 12 is shown fully depressed at which
l3, l9, are rotatable on a shaft 2! mounted in
time the pin 3| is in the path of the abutment
the base of the machine and, as will be apparent,
movement of slide l5 and its rack bar I’! in one
29 on the actuator slide I5 and, while the abut
ment 29 has been permitted a slight movement
direction or the other will, through the gears
so as to clear the end of the latch 21, neverthe
l8, l9, cause the rack bar R to move in corre
less the actuator slide is still unable to com- »
sponding directions. At this point, it should be
pointed out that this provides a comparatively
plete its full movement under the influence of
the spring 22 by reason of the fact that the pin
simple connection between the rack bar I1 and
3! is still interposed in the path of the abutment
rack bar R, only the twogears fast with one an
other being required by reason of the fact that 40 29. In other words, the actuator slide I5 can
not move to shift the knot tying elements from
the two rack bars occupy the same relative posi—
their normal positions to their thread-engaging _
tions with respect to the gears with which they
positions until the operating lever has been re
mesh and the further fact that both rack bars
tracted a slight distance sufficient to free the
' move simultaneously in the same directions.
As stated, the thread‘looper H and the loop ' abutment 29. However, when the operating
lever has moved upwardly this slight distance the
shifter S are shown in their normal positions
in Fig. 3. When so positioned, they are located
spring 22 will snap the actuator slide toward the
left, as viewed in Fig. 1, it being understood that
to one side of the path of the needle whose point
with the operating lever substantially fully de
is adapted to be received in guide G in the base
and to move the parts into thread-engaging posi 50 pressed its arm 25 will be spaced some‘ distance
from the stud 26 on the slide and said arm 25
tion rack bar R has to be moved to the left, or
will not interfere with this movement of the
in the direction of the arrow, as shown in Fig. 3.
slide. This movement of said slide will, through
To accomplish this the slide 15 is ‘movable to- the
its rack bar H, the gears l8, l9, and the rack
left, as viewed in Fig. 1, under the influence of
a spring 22 attached at one end to a pin 23 on 55 bar R, cause the knot tying instrumentalities to
assume their thread-engaging positions. How
the slide and at its opposite end to a pin 24 on
ever, at this time, the large loop will have been
the bracket l6. Reverse movement of the knot
formed in the thread by reason of the slight re
ting mechanism for the purpose of tying the knot
traction of the needle, asv previously described,
is accomplished by a reverse movement of the
rack bar R which, in turn, is effected by means (50 so that, as the operating lever completes its
retractive movement its arm 25 will engage pin
of an arm 25 rigid on the operating lever and
25 and force the actuator slide ‘I5 back to its
whose lower end is adapted to engage a stud 25
normal position with the result that the rack bar
on the actuator slide l5. Normally the actuator
slide I5 occupies the'position in which it is shown
R will, likewise, be moved in a reverse direction
in Fig. 1, so that, when it is free to move under 65 to ‘effect the tying of the knot in the loop of
the influence of spring 22, it will move toward
thread. These movementsv of the actuator slide
and the knot tying devices are all effected
the left and thus cause the knotter elements to
rather rapidly because the spring 22 snapsthe
assume their thread-engaging position but, in
order to permit a comparatively large loop to be
actuator slide I5 to the left, as viewed in Fig. ‘l,
formed in the thread H after the latter has been 70 as soon as the slide ‘abutment 29 is free of the
pin 3| 0n the operating lever andthe return
pushed through the layers of fabric on the base
54 into positiohto be engaged by the knot tying
movement of the slide is also carried out with
more or less of a snap action because the retrac
mechanism, the movements of the actuator slide
are so controlled that the operating lever 12 is ’ 'tive movement of the operating lever 12 is also
permitted to be completely depressed and par ‘75 performed with a spring action as described in
6
the‘ previously identi?ed application. The spring
base toa point below’the base for engagement
for, retracting the operating lever is simply here
of the thread by said knotter mechanism ‘and
shown at 40 in Fig.4. In other words, the oper
ator does little more than depress the operating
lever and then releases it.
-’ rA'fur-ther-detail, and a further advantage ‘of
means operable by said lever for reciprocating
said rack bar, said rack bar reciprocating means
comprising a reciprocatory actuator slide con
nected to said rack bar, a spring for moving said
actuator slide in one direction; a- stop normally
engaging said slide and releasably holding the
the present arrangement‘ for actuating the rack
bar- of the knot tying mechanism is the fact
that‘the pin 31- is‘ adjustable into and out'of
same against movement under the in?uence of
the operating lever, but locked in any desired 10 said spring, a stop actuating-member operable
position by a lock nut 32. Thus the distance
upon advance movement of the needle through
the pin projects from the handle can be length
the fabrics to disengage said stop and permit
enedor shortened to vary the distance the oper
a .limited'movement of said slide by said spring,
ating lever must be initially retracted to free the
said‘ stop actuating member being engageable by
abutment 29 of the actuator slide which, in turn, 15 the slide by said limited movement of the lat
will permit the size of the loop formed in the
ter to ‘prevent further movement thereof while
thread to be varied. In other words, but screw
the needle is advanced and disengageable from
ing the pin 3| into its socket in the lever arm the
said slide upon retraction of said needle to per
pin may be said to be shortened so that it will
mit completion of the movement of the slide
clear the actuator. slide abutment 29 after- a
under the in?uence of said spring whereby said
very slight retractive movement of the operating
rack bar will be reciprocated in one direction,
lever. Under these circumstances, the needle
and means operable by the retraction of said op
will be retracted only a short distance and a
erating lever and needle for reciprocating said
comparatively small loop formed in the thread.
actuator slide and rack bar in the opposite di
On the other hand, by adjusting the pin out 25
wardly from the handle it may be said to be
2. In a thread marking machine having a base
rection.
lengthened so as to require a more extended‘re
~
‘
on which the fabrics to be marked are supported,
a knotter mechanism below said base, a thread
tractive movement before itclears the actuator
slide abutment 29 and,runder these conditions,
a comparatively largerloop will be formed in the '>
thread for engagementby the knot tying devices.
As previously indicated, by forming the bulge
or loop in the thread it is unnecessary to make
the needle of reduced cross-sectional area and
thus Weaken it as is the case where the thread
looper'H'has to more or less pick the thread 01f
the ‘side of the needle; In this connection it
should be added that in'view of vthe fact that the
needle is in its‘depressed position at the time
the loop shifter S moves from its normal posi 40
tion to. itsoathread-engaging position, this loop
shifter is made of two hingedly connected sec
tions S’, $2, the section S2 being mounted on
the shaft 33 and the two sections being pivotally
connected together by a pivot pin 34, as shown
>
is. C,
carrying needle, a depressible operating lever for
moving said needle and thread from a point
above the base through the fabrics to a posi
tion for engagement of the thread by the knotter
below ‘the base, and a reciprocatory slide for
actuating said knotter mechanism, the‘ combi
nation of a spring formoving said slide in one
direction, a stop normally engaged by said slide
and preventing movement thereof under them
?uence‘ of said spring, a trip carried by said lever
for disengaging said stop from said slide and
engageable with said slide to prevent movement
of‘ the ‘latter under the in?uence of the spring
when said lever is fully depressed, said trip be
ing disengageable from said slide upon retraction
0f the: operating lever whereby the slide is moved
in one direction by said spring and means oper
in Fig. 6. Section S’ is provided with an abut
able by said lever during the retraction of the
ment 35 which is held in engagement with a
latter for returning said slide to its normally
pin 36 on section S2 by a spring 31, the arrange
locked position.
i
ment being such that when the loop shifter
3. In a thread marking machine having a base
moves from its normal position to its thread 50
on which the fabrics to be marked are supported,
engaging position the section S’ can turn on its
pivot 34 so as to wipe past the needle 3| but
a knotter mechanism below said base, a thread
carrying needle, a depressible operating lever
upon return of the loop shifter in a knot tying
for moving said needle and thread from a point
operation it constitutes a substantially rigid ele
above the base through the fabrics to a posi
ment, it being understood that during this por
tion of the cycle of operations the needle 3| has
tion for engagement of the thread by the knotter
been elevated. The actuator slide I5 may be
below the base, and a reciprocatory slide for
secured on the bracket It in various ways al
actuating said knotter mechanism, the combi
though in the present instance it is merely
nation of a spring for moving said slide in one
shown as being provided with slots 38 through 60 direction, a releasable latch normally engaging
which studs 39 secured in the bracket 16 extend,
said slide and preventing movement of the lat
the studs 39 forming guides and the slots 38
ter under the in?uence of said spring, means
forming guideways to control the reciprocatory
yieldingly urging said latch into its normal slide
movements of the slide bar. The operating lever,
engaging position, a tripoperated by said lever,
which is pivoted at M on an abutment 42 on the 65 for disengaging said latch from the slide and,
bracket I B, is formed with telescoping sections
permitting limited movement ‘of the slide under
to compensate for the pivotal movement of the
the in?uence of the spring, said trip being posi
lever.
tioned in the path of said slide and limiting the
What is claimed is:
movement of the latter by the spring when the
1. In a thread marking machine having a base 70 lever is fully depressed and said trip being dis
for supporting fabrics to be marked, a knotter
engageable from the slide by retraction of the
mechanism below said base, a reciprocatory rack
operating lever to permit completion of the move
bar for actuating said knotter, a thread-carrying
ment of the slide under the in?uence of the
needle, a depressible operating lever for advancing
spring, and means operable by the operating lever
said needle and thread through fabrics on the~ 75 during the completion of its retracted movement
2,412,768
position,
'
"
mounted for reciprocation on said bracket, the
combination of a spring for moving said slide
-
4. In a thread marking ‘machine having a base
on which the fabrics to be marked are supported,
a knotter mechanism below said base, a thread
8
hanging said base and a ‘knotter actuator slide
for restoring said slide to its normally locked
in one direction and an abutment on said slide, a
5
latch pivoted in the bottom of said armand
yieldingly urged upwardly into engagement with
carrying needle, a depressible operating lever for
said vslide abutment for normally preventing '
moving said needle and thread from a point above
movement of the slide under the in?uence of said
the base through the fabrics to a position for
spring, a pin adjustable in said lever and mov
engagement of the thread by the knotter below
the base, and a reciprocatory slide for actuating ll) able into engagement with said latch upon de
pression of the lever to release said slide abut
said knotter mechanism, the combination of a
ment, said pin being positioned in the path of
spring for moving said slide in one direction, a
said slide abutment when the lever is fully dev
lateral projection on said slide, a latch yieldingly
pressed at a point to permit said abutment to
held in the path of said projection and normally
move out of its latch engaging position while still
preventing movement of the slide under the in
preventing completion of the movement of the
?uence of said spring, a pin movable by the de
slide under the influence of said spring, said pin
pression of the operating lever into engagement
being movable out of the path of said slide abut
with said latch to disengage the latter from en
ment upon the initial retractive movement of the
gagement with the projection on the slide, said
lever, to permit completion of the movement of
pin being positioned in the path of the projection
the slide under the in?uence of the spring,»and
on the slide when the operating lever is fully
means operable by the‘ operating lever during
depressed and said latch is released for permitting
the completion of the retractive movement of the
a limited movement of the slide under the in
latter for restoring said slide and its abutment
?uence of the spring whereby said projection is
moved out of its latch-engaging position and said 25 in latch-engaging position.
6. In a thread marking machine having a base
pin being movable out of engagement with said
slide, projection by the initial return movement
oiithe operating lever whereby the movement
of said slide by said spring‘ is completed, and
on which the fabrics to be marked are supported,
a knotter mechanism below said base, a thread
carrying needle, a depressible operating lever for
means operable by the retraction of said operat 30 moving said needle and thread into and out of
operative association with the knotter mech
ing lever for moving said slide in the opposite
direction and restoring the same with the pro
jection of said slide in latch-engaging position.
5. In a thread marking machine having a base
on which the fabrics to be marked are supported, “
a knotter mechanism below the base, a thread
carrying needle, a depressible operating lever for
moving said needle and thread from a point above
, the base through the fabrics to a position for
anis'm, a reciprocatory rack bar for actuating
said knotter mechanism and a reciprocatory
actuator slide for reciprocating said rackbar,
driving connections between said rack bar and
slide consisting of a pair of gears having a com—
mon center of rotation, one of said gears engag
ing said rack bar and a rack bar formed on said
slide and engaging the other of said gears.
engagement of the thread by the knotter mech
anism below the base, a supporting bracket over
JACOB DASHEW.
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