Improvements in Linking and Analogous Machines.
Year: 1897

page_text: Date of Application, 9th Sept., 1897
Complete Specification Left, 5th Nov., 1897-Accepted, 12th Mar.,
1898
PROVISIONAL SPECIFICATION.
Improvements in Linking and Analogous Machines.
I, FERDINAND JULIUS KÖBLER, of Limbach, Saxony, in the German Empire,
Engineer, do hereby declare the nature of this invention to be as follows:-
-
This invention relates to improvements in linking and analogous machines.
Heretofore provision has only been made on linking machines for a single
thread, the consequence being that what is known as a chain stitch has been
formed, the result being that, the fabrics or materials have been linked or joined
together in a manner subject to unroving.
By this invention I overcome this disadvantage and
materials together with a lockstitch.
secure the fabrics or
instance of the type
In applying the invention to a linking machine for
associated with my name, I preferably use a straight needle carried and actuated
in any convenient manner.
I also provide a hook or equivalent carried and actuated from any suitable part
of the machine. The second or additional thread may be carried from a spool or
bobbin mounted on the machine and is passed through an eye or opening formed
in the said hook.
When in operation the needle (which carries one thread with it) may be projec-
ted forward and pass just over the said hook, receiving in its forward progress a
loop from the latter. The said hook is preferably simultaneously moved and
slightly raised so that the needle in its backward movement may leave another loop
on the hook and at the same time draw or form a lockstitch in the fabrics to be
linked together.
Improvements in Linking and Analogous Machines.
I, FERDINAND JULIUS KÖHLER, of Limbach, Saxony, in the German Empire,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to improvements in linking machines, both circular and
straight.
Heretofore provision has only been made on linking machines for a single thread
which formed a chain-stitch the result being that the fabrics or materials thus
linked together were joined by stitches subject to unroving.
By this invention I overcome the disadvantages accruing from the use of a
Pine Rd 1

page_text: single thread and secure the fabrics or materials together with a double thread link-
ing-stitch. In applying the invention to a linking machine of the ordinary circular
type, I preferably use a straight needle and give it a to-and-fro movement in a
horizontal line. I also provide a hook which acts as a looper, the second or
additional thread being passed through an eye or opening formed therein. When
in operation the needle which carries the usual thread, will travel forward and pass
just over the said looper receiving in its progress a loop from the latter. The looper
is simultaneously moved and slightly elevated so that the needle in its backward
movement will leave another loop on the hook or looper and at the same time
draw or form a double thread linking-stitch in the fabrics or materials to be
linked together.
The adaptation necessary to apply my invention to a straight bar linking
machine also shown in the drawings and hereinafter described.
Referring to the accompanying drawings,
Figure 1 is a perspective view of a circular linking machine, constructed in
accordance with this invention, the main arm of the machine being broken
through to more clearly show certain parts of the mechanism.
Figure 2 is a similar view to Figure 1, but with some of the parts removed to
show the mechanism inside the chamber.
Figures 3 and 4 are sectional elevations showing the mechanism for carrying
the needle and looper, the needle being in its extreme forward and backward
positions respectively.
Figures 5 and 6 are perspective views illustrating the formation of the stitch.
Figures 7 and 8 are elevation and plan respectively of the cam for actuating the
looper.
Figures 9 and 10 are elevation and plan respectively showing the application
of my invention to a straight bar linking machine.
"
Like letters of reference indicate like parts throughout the several figures.
Referring to Figures 1 to 8 inclusive, the fabrics A are pressed upon the points A¹
(Figure 1) fixed in the ring A³, the latter being caused to revolve through the
medium of the ratchet wheel A³ operating on intermediate mechanism (not shown
in the drawings).
The ratchet wheel A³ is operated by the pawl B₁ fixed to the lever B whose
inward end is pivotted at B2, Figure 2, to the vertical lever B³ the lower end of
the latter being pivotted to the inside of the chamber C.
The said vertical lever B³ is provided with a roller B, Figure 2, the latter bear-
ing upon the cam B³ and held in working position by the spring Be one end being
hooked to the said vertical lever B³ and the other end to the inside of the chamber C.
The said cam B5 is secured to the shaft D which may be driven by a belt passing
round the pulley D¹ or by a handle attached to the said pulley.
The needle E is carried in the usual end F1 of the spindle F the latter receiving
its to-and-fro movement from the fork F* engaging the eccentric F³, secured on
the shaft D.
The looper G has a lateral, a horizontal and a vertical movement imparted to it,
the needle receiving only the usual to-and-fro movement.
To impart the necessary vertical movement to the looper G, a cam H (Figures 7
and 8) is secured on the shaft D. The said cam H is provided with a rise or pro-
jection H (shown in dotted lines in Figure 7) upon which rests a nudge J formed
with a plate J which is attached to the horizontal lever K by screw and nuts K³.
The said cam H is also provided with a side projection H upon which the said
nudge J also bears, the lever K through the instrumentality of the springs L L¹
being kept in contact with the cam H which imparts the required movements
thereto.
The looper G is provided with an eye G¹ formed in the finger G through which
passes the additional thread M from the bobbin M³, to form the double thread
linking-stitch as hereinafter described. The looper G is carried in the forward
end of a spindle, K¹ and is regulated in height and fixed in position by the screw K³.

page_text: The end of the spindle K¹ passes into the end of a lever N and is secured in
position by the screws N¹, Figure 1. The lever N is fixed in the end N2 of the
lever K the latter being pivotted at Ns to a fork O, the stalk 03 of which is carried
in a boss or sleeve O₁ formed on the inside of the chamber C.
In the formation of the stitch the needle E and looper G are caused to assume
the relative positions shown in Figures 1 to 6. As before stated Figure 4 shows
the relative positions of the needle and looper after the formation of one com-
plete stitch and prior to the commencement of another.
The next position assumed by the needle and looper is shown in Figure 5, the
needle having pierced the fabrics A comes forward and between the looper G and
its thread M, the looper meanwhile remaining quiescent during the remainder
of the forward movement of the needle and until the eye of the latter in the return
movement has almost reached the looper, by which time the needle thread E¹ will
be forming a loop (see Figure 6) for the looper to penetrate as it rises.
Figures 12 and 3 show the needle in its extreme forward position, the looper
having disposed of or thrown off the needle loop. The needle in its return move-
ment, as before stated, leaves its thread in a loop like form slightly above it, towards
which the looper at once advances (Figure 6) and passes through, the needle con-
tinuing to withdraw leaves its loop on the looper, which rises and moves laterally
and takes the loop, by which time the two threads M and E¹ will have engaged
each other and formed a double thread linking-stitch in the fabrics A.
In Figures 9 and 10 a straight bar linking machine is shown the needle E being
carried in one end P¹ of a lever P the other end P2 of said lever having a slide P³
(shown in dotted lines in Figure 9) moving in a raceway P4 formed in the cam Q.
The looper G is carried in one end of the lever R the latter being provided with
rollers $ S¹ which engage with and are actuated by the peripheral cam Q¹ and side
cam Q respectively. It is obvious that the description before given of the for-
mation of the stitch upon the circular linking machine will also apply to the
straight bar machine and detail drawings of the relative positions assumed by
the needle and looper are unnecessary.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. A linking machine adapted to form a double thread linking stitch substan-
tially in the manner described and illustrated in the accompanying drawings...
2. In linking machines the provision of means for forming a double thread
linking stitch substantially in the manner described and illustrated in the accom-
panying drawings.
3. In linking machines the provision of means for making a double thread
linking stitch by combining with the ordinary needle thread an additional thread
actuated in the manner described and illustrated in the accompanying drawings.
4. In linking machines the combination with the ordinary needle thread of an
additional thread for the purpose described and illustrated in the accompanying
drawings.
5. The improvements in linking machines substantially as
illustrated in the accompanying drawings.
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described and