Improvements in Sewing Machines for Boot Soles.
Year: 1889

page_text: Date of Application, 18th Jan., 1889
Complete Specification Left, 17th Oct., 1889-Accepted, 30th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in Sewing Machines for Boot Soles.
I, HERMANN CARL GROS of Oberursel near Frankfurt-on-the-Main, Germany,
machine maker do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in sewing machines and more especially to
thoso sewing machines that are used for boot sole sewing in the boot manufacturing
trade, and consists in moving the shuttle in a vertical line when adjusting the
machine to take in thick or thin work; the shuttle in the machines as made till now
move in the arc of a circle, the consequence of which was that the shuttle was not
always at the same distance from the needle.
My invention also consists in making the tension roller turn with the horn of the
machine so that the thread does not get twisted round the different parts of the
machine.
In order to make my invention more clear, I refer to the accompanying drawings,
in which similar letters denote similar parts throughout the different figures.
Fig. 1 shows a vertical side view of my improved machine, partly in section.
Fig. 2 shows a front view of the same also partly in section.
Fig. 3 shows a sectional view of the bearing of the horn H on a larger scale showing
at the same time the manner of guiding the tension roller.
Fig. 4 is a horizontal section through the line a ß fig. 3.
Fig. 5 shows a front view of the brake gear for the presser.
Fig. 6 shows the arrangement and working of the presser.
Fig. 7 shows the driving gear for the shuttle on a larger scale.
Fig. 8 is an end view of fig. 7.
The shuttle carrier A is fastened to the vertical rod B by the screws a and b the
rod B is guided at its lower end in the guide C and guides the needle rod D vertically.
The shuttle carrier can be raised so as to allow the work to be placed under the same,
by the hand lever E. The spring 9 gives the cloth presser, which is fastened to
the under side of the shuttle carrier A, the necessary pressure while sewing. Fis a
ring fastened to the rod B against which the lever works, the spring g pressing against
the upper side of the same.
In order that the vertical motion of the shuttle carrier A can have no influence on
the driving gear G of the same; the driving gear G is connected to the main driving
gear by a link J and two universal joints II of ordinary construction; the link J is
in two parts, sliding into each other as shown in fig. 1.
The shuttle is driven from the main driving axle K; on the shaft K is a conical
wheel L which gears in the conical wheel M which is fastened on the shaft d; on the
shaft d is a wheel N below the wheel M which gears in the wheel O which is on the
shaft connected by the universal joints to the shuttle.
The driving gear could be so arranged that the wheel M be left out by making
the wheel L gear direct in the wheel N and the wheel N in the wheel O, but in this
arrangement the teeth in the wheel L must be made very short so that they clear the
wheel O as the space is very limited between the two wheels.
The thread feed lever U is moved up and down by the cam wheel T on the shaft d.
In fig. 1 is to be seen the direction the threads take, from the spool v over the roller r
and through the horn H to the point of the same.
The tension roller r is fastened to the arm k (fig. 3); the arm k is guided in a
groove in the bush to which the horn H is fastened the arm k moves with the
bush z when turned.
The lower end of the arm k is fitted movable over the end of the rod h which is
guided in a vertical direction by the shaft ; the arm k is held on the end of the

page_text: rod by the ring e; the rod is connected to the end of the lever U and communicates
the motion of the lever U to the roller r. By this arrangement the tension roller r
turns with the horn H while the rod / romains in the one position and fastened to the
lever U.
In order to prevent the work rising with the needle when the same is raised, the
nose n of the lever m catches in a tooth in the rack O, which is fastened on the shuttle
carrier A on which the presser is fastened. The presser can be relased by turning the
eccentric u to which is fitted a handle for the purpose but the locking mechanism is
always brought into gear automatically by the spring f
Dated Berlin, this 16th day of January 1889.
By A. KUHNT & R. DIESSLER,
38, Alexander Strasse, Berlin C, Germany, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Sewing Machines for Boot Soles.
I, HERMANN CARL GROS of 'Oberursel near Frankfurt on the Main, Germany,
machine maker 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:-
My invention relates to improvements in sewing machines and more especially to
those sewing machines that are used for boot sole sewing, in the boot manufacturing
trade, and consists in moving the shuttle in a vertical line when adjusting the machine
to take in thick or thin work; the shuttle in-the-machines.as made, till now, moves
in the arc of a circle, the consequence of which is, that the shuttle is not always
at the same distance from the needle.
My invention also consists in making the "take-up" roller turn with the horn of
the machine so that the thread does not get twisted round the different parts of
the machine, and of an arrangement to prevent the stuff from rising with the upward
movement of the needle.
In order to make my invention more clear, I refer to the drawings sent in with
provisional specification, in which similar letters denote similar parts throughout the
different figures.
Fig. 1 shows a vertical side view of my improved machine, partly in section.
Fig. 2 shows a front view of the same also partly in section.
Fig. 3 shows a sectional view of the bearing of the horn H on a larger scale,
showing at the same time the manner of guiding the tension roller.
Fig. 4 is a horizontal section through the line a ẞ fig. 3.
Fig. 5 shows a front view of the brake gear for the presser.
Fig. 6 shows the arrangement and working of the presser.
Fig. 7 shows the driving gear for the shuttle on a larger scale.
Fig. 8 is a side view of fig. 7.
The shuttle carrier A is fastened to the vertical rod B by the screws a and b,
fig., the rod B is guided at its lower end in the guide (which also guides the needle
rod vertically. The shuttle carrier can be raised so as to allow the work to be
placed under the same, by the hand lever E. (Fig. 6). The spring g gives the cloth
presser, which is fastened to the under side of the shuttle carrier A, the necessary
pressure while sewing. F is a ring fastened to the rod B against which the lever
works, the spring g pressing against the upper side of the same.
In order that the vertical motion of the shuttle carrier A can have no influence on
the driving gear G of the same, the driving gear G is connected to the main driving
gear by a link J and two universal joints I, I of ordinary construction; the link J is
in two parts sliding into each other, as shown in fig. 1.
The shuttle is driven from the main driving axle K; on the shaft K. is a conical
wheel L which gears in the conical wheel M which is fastened on the shaft d; on the
shaft d is a wheel N below the wheel M which gears in the wheel O which is on the
shaft connected by the universal joints to the shuttle.

page_text: The driving gear could be so arranged that the wheel M be left out by making the
wheel L gear direct in the wheel N and the wheel N in the wheel O, but in this
rrangement the teeth in the wheel L must be made very short so that they clear the
wheel as the space is very limited between the two wheels.
The thread feed lever U is moved up and down by the cam wheel T on the shaft d.
In fig. 1 is to be seen the direction the thread takes, from the spool » under the
roller and through the horn H to the point of the same.
The "take up" roller r is fastened to the arm k (fig. 3 ;) the arm k is guided in a
groove in the bush z to which the horn H is fastened; the arm & moves with the bush z
when turned. The lower end of the arin k is fitted movably on the end of the rod h
which is guided in a vertical direction by the shaft w; the arm & is held on the end of
the rod by the ringe; the rod h is connected to the end of the lever U and
communicates the motion of the lever U to the roller r. By this arrangement the take
up roller turns with the horn H while the rod remains in the one position and
fastened to the lever U.
the
In order to prevent the work rising with the needle when the same is raised,
nose n of the lover m is adapted to catch in a tooth in the rack o, which is fastened on
the shuttle carrier A, on which the presser is fastened. The locking mechanism is
brought into gear automatically by the spring fand the presser will be released by
the excentric u on the shuttle driving shaft after each stitch.
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:
In sewing machines for boot soles:
1.) The combination of a shuttle carrier, carrying further, the presser and moveable
in a direction parallel to that of the motion of the needle in the manner and for the
purpose substantially as described.
2.) The combination with a shuttle and presser carrier, moveable in the manner
specified, of two universal joints 1 and 1', link J consisting of two parts sliding one
within the other, and of gearing wheels connecting shuttle shaft with main driving
shaft, in the manner substantially as described and shown.
3.) The combination of a take up roller which shall revolve with the horn in the
manner and for the purpose substantially as described.
4.) The combination of a lever m having tooth n working in ratchet o on. shuttle
carrier, and of an excentric u, in the manner as specified and for the purpose stated.
Date], Berlin, this 14th day of October 1829
UDT ADOa
By A. Kuhnt & R. Deissler,
CARL GROS.
38, Alexander Strasse, Berlin C, Germany, Agents for Applicant.