IMPROVEMENTS IN SEWING MACHINES
Year: 1885

page_text: I, HERBERT JOHN HADDAN, of 67 Strand, in the City of Westminster, Civil
Engineer, do hereby declare the nature of said Invention for IMPROVEMENTS IN
SEWING MACHINES, a communication to me from abroad by Albert Wedermann,
Manufacturer, of 17 Marxergasse, Vienna, Austria, to be as follows:-
This invention relates to improvements in Elastic Cylinder Sewing Machines
called "Post Machines" and especially to devices for causing the periodical return
in successive position of the "cloth or "leather feeder" whereby the needle
executes cross-stitches which produce a whipped or overcast seam.
The improvements are as follows:
"
Upon the arbor of the driving wheel, which arbor has its bearing in the main
arm of the machine is mounted a toothed wheel which meshes with a second
toothed wheel of twice as large a diameter than the former.
The arbor of the latter wheel has its bearings in two standards.
This large wheel is provided at its inner surface with a furrow or groove in
which runs a bar which is provided with a yoke and which is capable of turning
around studs having their bearings in the standards. This bar is connected to
a rod or pitman by means of a link shaped in form of a sleeve capable of being
shifted along the bar whilst a simple hinge secures the requisite mobility of
the bar.
At its opposite end the bar or pitman is connected to a toothed segment which
turns around the pivot.
This pivot is arranged on a separate support expressly fixed for the purpose
on the sleeve of the cylinder.
A toothed segment meshes with a toothed wheel which is keyed to the cylinder
proper of the machine to which the "cloth-feeder" or "transporteur" is rigidly
connected. This cylinder has its bearings inside of the sleeve and can turn.
freely.

page_text: 57
I, HERBERT JOHN HADDAN, of 67 Strand, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention a communication to me
from abroad by Albert Wedermann, Manufacturer, of 17 Marxergasse, Vienna,
Austria, 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 Sewing-machines and especially to
a device which effects, that the periodically returning, succeeding positions of the
cloth (or properly leather)-feeder cross each other, in consequence of which fact
the needle executes cross-stitches which are appropriate for producing a whipped
or overcast seam.
The invention shall now be more fully explained with reference to the annexed
drawing,
Fig. 1 is a side view of the upper part of a Sewing Machine provided with these
improvements.
*
For the sake of clearness the foremost standard is omitted, and the main arm of
the machine and the needle-bar-lever are merely indicated.
Fig. 2 is a plan of the same.
Fig. 3, 4 and 5 show details.
Fig. 3 is a front view of the cylinder, its toothed wheel and the toothed
segment.
Figs. 4 and 5 will be explained afterwards.
Upon the arbor a of the driving wheel, which arbor has its bearing in the main
arm of the machine, is mounted a toothed wheel b which meshes with a second
toothed wheel c, having twice as many teeth as the former.
The arbor d of the latter wheel has its bearings in the two standards e.
This upper and larger wheel is provided at its inner surface with a groove f, in
which runs a friction roller g held by a bar i which is provided with the yoke h
(giving room to the wheel c) and which is capable of turning around the studs k
having their bearings in the standards e. This bar is connected to a rod 7 by
means of a link m, forming at m¹ a sleeve capable of being shifted along the bar i,
whilst at m² a simple hinge secures the requisite mobility of the bar l.
At its opposite end the bar is connected to a toothed segment p, which turns
around the pivot o.
This pivot o is arranged on a separate support 7 fixed for the purpose on the
of the cylinder, (Fig. 3).
sleeve
The toothed segment p meshes with a toothed wheel 8, which is keyed to
the cylinder proper t of the machine, to which the cloth-feeder or "transporteur "u
is rigidly connected. This cylinder t has its bearings inside of the sleeve and can
turn freely.
I will now explain the manner of working of the apparatus.
Supposing the driving wheel A and with it the toothed wheel b are turned in the
direction of the arrow 1 (which may be effected by treadle, hand wheel, steam- or
water power etc.) then the upper toothed wheel c will turn in opposite direction

page_text: and by virtue of its groove will act upon the roller g of bar i in such a manner that
this latter bar will turn in the direction of the arrow 2 (that is to say to the right),
and consequently will also move the bar to the right, and that during all the time
it takes for the lower wheel to make a complete revolution (or for the upper one to
make half a revolution); during the second complete revolution of the lower wheel
(or the second half revolution of the upper wheel) the peculiar shape of the groove
effects that the whole mechanism (exclusive of the two toothed wheels b and c) is
moved in opposite direction, that is to say withdrawn in the direction of the
arrow 3.
Consequently, during the revolutions of the driving wheel, the toothed segment p,
which meshes with the toothed wheel 8, will have brought the cloth feeder into two
different positions, which cross each other (as shown in Fig. 4), in consequence
of which the needle executes cross-stitches (Fig. 5), which are appropriate for
producing a whipped or overcast seam.
It is understood, that the angle enclosed by two succeeding positions of the
cloth-feeder may be decreased or increased by adjusting or moving the connecting
link m along the bar i, so that any desirable form of cross-stitches may be produced
(as shown in Fig. 5).
It is also understood that the details of construction may be varied without
departing from the nature and essence of this invention.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare, that what
I claim, is
1.) In Sewing-machines, an apparatus which effects, that the periodically
returning consecutive positions of the cloth (or leather) feeder cross each other,
in consequence of which the needle executes cross-stitches in the cloth or leather,
which cross-stitches are appropriate for producing a whipped or overcast seam,
substantially as and for the purpose described.
2.) In Sewing-machines, an apparatus, which effects, that the periodically
returning consecutive positions of the cloth (or leather) feeder cross each other,
in consequence of which the needle executes cross-stitches in the cloth or leather,
which cross-stitches are appropriate for producing a whipped or overcast seam, the
said apparatus essentially comprising the toothed wheel b, the eccentric or toothed
wheel c provided with groove f, the bar i provided with roll g and yoke h, capable
of turning around the studs k, which bar i, by means of link m, m³, m², is connected
to the rod l, which latter at its other end is connected with the toothed segment p,
which has its pivot at o and meshes with the toothed wheel 8, keyed to the
cylinder t, which is placed and has its bearing inside of the sleeve q, and which
cylinder is rigidly connected to the cloth-feeder or transporteur u, substantially as
and for the purpose described.
3.) The special constructions represented in the annexed drawing, substantially
as and for the purpose described.