Improvements in Sewing Machines.
Year: 1893

page_text: Date of Application, 6th Dec., 1893
Complete Specification Left, 3rd Sept., 1894-Accepted, 27th Oct., 1894
PROVISIONAL SPECIFICATION..
Improvements in Sewing Machines.
We, JOHANNES HAAS, of 9, Postplatz, Eibenstock, Engineer, and RICHARD
LINTZ, of 109, Grüner Weg, Berlin, Manufacturer, both in the Empire of Germany,
do hereby declare the nature of this invention to be as follows:-
Our invention relates to sewing machines of that class which is especially
adapted for braiding or cording and in which the fabric is guided by means of a
presser-foot movable in all directions by means of a crank-handle.
According to our invention we make use of a shuttle moving to-and-fro in a
straight path and so construct the machine that any kind of sewing can be
employed for the purpose of sewing on braid, ribbon, strings of pearls, or other
strings consisting of one or several rows lying parallel to one another. Thus, not
only is it possible to execute the simple, ordinary kind of needlework with this
machine, but also zig-zag stitching, and such as is done with several upper threads.
Further, cords can be simultaneously sewn on to both sides of a fabric, which
has not been possible with any other machine.
This versatility is obtained by providing means whereby such a rotation is
imparted to the rectilinear path of the shuttle simultaneously with the needle-bar
that the path traversed by the shuttle remains constantly the same with reference
to the needle-bar. The path of the shuttle and the needle-bar can thus never
rotate independently of, or in a direction opposite to, each other.
The required rotation is obtained by causing both the movably arranged shuttle-
carrier and the needle-bar to be driven by the same crank which serves for guiding
the direction of the presser-foot.
The sewing on of a lower cord simultaneously with an upper cord is effected
by attaching on the support of the guide or race in which the shuttle-carrier slides
a cord-guide which stands vertically below the upper cord-guide. With the same
object a reel-carrier is attached to the said support.
The lower part of the needle-bar is so jointed that it can be shifted laterally
by means of a suitable thruster so that when executing a zig-zag line of sewing
the needle always remains at right angles to the fabric. When, however, it is
desired to sew on simultaneously two cords lying parallel to each other side by
side, each with its special thread, a fixed needle-bar is made use of instead of a
jointed needle-bar, which fixed needle-bar carries two needles.
Dated the 6th day of December 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Sewing Machines.
We, JOHANNES HAAS, of 9, Postplatz, Eibenstock, Engineer, and RICHARD
LINTZ, of 109, Grüner Weg, Berlin, Manufacturer, both in the Empire of Germany,
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 :-
Our invention relates to sewing machines of that class which is especially

page_text: adapted for braiding or cording and in which the fabric is guided by means of a
presser-foot movable in all directions by means of a crank-handle.
According to our invention we make use of a shuttle moving to-and-fro in a
straight path and so construct the machine that any kind of sewing can be employed
for the purpose of sewing on braid, ribbon, strings of pearls, or other strings
consisting of one or several rows lying parallel to one. another. Thus, not only is
it possible to execute the simple, ordinary kind of needlework with this machine,
but also zig-zag stitching, and such as done with several upper threads.
The lower part of the needle-bar is so jointed that it can be shifted laterally by
means of a suitable thruster so that when executing a zig-zag line of sewing the
needle always remains at right angles to the fabric.
To enable our invention to be fully understood we will describe how it can be
carried into practice by reference to the accompanying drawing, in which:-
Figure 1 is a side elevation of a sewing machine constructed according to our
invention.
Figure 2 is a front elevation of the same, and,
Figures 3 to 6 are sectional views of details.
The up and down motion of the needle-bar e is effected from the main spindle a
by means of spindles and , which are in connection with the main spindle
through bevel wheels. On a plate at the end of the spindle which runs
horizontally in the head B is placed a crank pin 2 which works in a groove in a
curved or heart-shaped disc ³ fixed on the thruster, and thus gives an up and
down movement to the thruster 4, to which the needle-bar c is revolubly attached
(Figures 1 and 2).
The needle-bar is not rigidly attached to the thruster 4, but is suspended from a
grooved ferrule 6, Figures 1, 2 and 3, which can rotate in a ring attached to
the thruster . The needle-bar is secured to the ferrule 6 by means of a sleeve.,
which is pivotally connected to the ferrule by means of screws 8, the needle-bar
being secured in the sleeve by means of a clamping screw 6.
The upper end of the needle-bar is firmly held by the sleeve and below this
point is Hattened at the sides at 8 where it passes through the upper part of the
main tube a, or through suitable guides attached to the latter, and is thus forced to
follow the rotation of the tube a. This rotation of the tube a is effected by means
of the crank handle A through the intervention of appropriate mechanism to be
hereafter described. On the tube-a is fixed a hevel wheel p, which engages with a
similar wheel 2 upon the spindle p'. The horizontal spindle p is driven from
the vertical spindle pt by means of a pair of bevel wheels p³, which are rotated by
a similar pair of wheels and spindle p from the crank handle A.
The lower part co of the needle-bar is jointed to the main section of the same c³,
so that the upper part which is connected to the piece acts like a connecting
rod.
The part co moves in a vertical direction in a thrusters provided with a
corresponding bore, which thruster thus acts as a piston tube and its casing s is
secured to the lower end of the tube a and rotates with the latter. By the action
of the thruster s the lateral shifting of the needle-bar is allowed, so that the needle
can execute zig-zag stitching when required.
Above this thrusting mechanism the tube a is surrounded by a casing which is
secured to the head 132 by means of an arm and on this casing is a second one h²
provided with two annular grooves 3 and moveable in a vertical direction.
On an
arm secured to the main tube a a bell crank lever is pivotted at he, one arm 7 of
the said lever engaging with a spindles which has its bearing in the thrusters,
Figures 5 and 6, whilst the other arm engages with the lower groove ³ in the
casing by means of a sliding block 8, so that a vertical movement of the casing
gives rise to a horizontal motion of the thruster s.
The operation of the casing is effected by means of the lever k, which rotates
at i on the head B2, is engaged in the upper groove h³ of the casing h² and connected

page_text: by the removable and adjustable connecting rod k¹ to the cranked lever A³ which
is fulcrumed at i¹.
On the head B2 there are further attached two projecting brackets 4, which carry
a spindle having a cam mounted thereon. This spindle is rotated from the
main spindle a, by means of the pair of wheels 1, Figures 1 and 4, and operates
the cranked lever by means of the cain . The arms of the levers and
which are connected by the connecting rod are slotted at their ends, and in the
slots the pins of the connecting rod can be shifted for the purpose of altering the
throw of the needle. When the regulation has been effected these pins can be fixed
in position on the lever arins & and k² by set screws ³.
In Figures 5 and 6 the extreme positions of the thrusters are shewn. The
change of the position of the thruster takes place at the highest point of the needle.
The frame m which guides the shuttle or the carriage or case of the latter is
secured to a rotating spindle n, which is so carried by the bracket that its
axis of rotation coincides with the axis of rotation of the needle tube a and needle
bar c.
The spindle n has its upper bearing in the table plate at n', and here carries a
lower cord guide a which is fixed, but cannot rotate, in the head of the spindle n,
so that it shares in the movement of rotation of the latter. The hole for the
cord in the lower cord guide n² is located exactly opposite the hole for the cord in
the upper cord guide d. The reel carrier n³ for the lower cord reel n is fastened
on the spindle ». Rotation is imparted to the spindle n and with it to the frame m
simultaneously with the upper members, the tube a and needle-bar c, from the crank
handle A by means of the pair of bevel wheels o¹, the spindle o³, and the pair of
bevel wheels o*.
Motion is imparted to the shuttle from the main spindle a² itself. Upon this
latter is mounted an eccentric, the eccentric rod f of which is jointed to the
end of the arm of the lever, 8, which has its fulcrum at f'. The free forked
end of the arm of the lever engages by means of suitable sliding blocks in the
annular groove n of the casing n which fits loose round the spindle n, so that the
lever arm causes a vertical motion of the casing n independently of the movement of
rotation of the spindle n. On an arm fixed to the spindle n there is pivotted
at n° a cranked lever m','m² the arm m² of which engages with the annular groove n°
by means of suitable sliding blocks and is thus set in motion by the groove n³ of
the casing n. The free end of the other arm m³ is jointed to the carriage m' of
the shuttle by means of the link m³, and effects the to-and-fro movement of the
shuttle. If instead of producing a zig-zag kind of sewing with the machine it is
desired to sew the cord on with straight stitching in the ordinary way, that is to
say, to communicate a simple up and down motion to the needle, the connecting rod k
must be removed by loosening the screws k³, and the thrusters be adjusted in its
mid position, and be secured in this position by means of the set screw s³.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
In a sewing machine a needle-bar jointed in such a manner that the lower part
can be shifted laterally by means of a suitable thruster so that when executing a
zig-zag line of sewing the needle always remains at right angles to the fabric,
substantially as set forth.
Dated the and d
of Saneambar 1904
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.