Improvements in or applicable to the Feed Rolls of Machinery used for Joining Together Hosiery and the like Fabrics.
Year: 1899

page_text: Date of Application, 21st Mar., 1899-Accepted, 22nd Apr., 1899
COMPLETE SPECIFICATION.
Improvements in or applicable to the Feed Rolls of Machinery used
for Joining Together Hosiery and the like Fabrics.
I, JULIUS KÖHLER, of Limbach, Saxony, Germany, Sewing 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 said invention relates to a positive driving motion for operating the feed
rolls of machines used for joining together hosiery and the like fabrics with the
object of varying the intermittent rotation of the feed rolls.
The fabric to be operated on passes through the rotating feed rolls to the
needle and consequently any variation in the amount of their rotation produces
an alteration in the length of the stitch.
Reference is hereinafter made to the accompanying drawings for the purpose
of describing my said invention. Of these drawings
Figures 1 and 3 are side elevations partly in section (looked at in the direction
of the arrow of Figs. 2 and 4).
Figures 2 and 4 are plans.
As already described in one of my previous patents viz. No. 16776 of A.D.
1898 a worm wheel & (Figs. 2 and 4) is provided which is intermittently rotated
by a worm g deriving continuous motion through the gearing m¹m² and n¹n²
(Fig. 2) from the driving shaft k (Fig. 1).
Besides having an axial rotation the worm g is capable of being slid longi-
tudinally on its shaft g². For effecting the latter motion a bowl h (Fig. 3)
which is mounted on a stud in the bed plate of the machine engages in a cam g¹
(Figs. 2 and 4). If however the worm g makes say half a revolution to rotate
the worm wheel through half a tooth while at the same time it slides a like
distance in the opposite direction to that in which the worm wheel rotates the
latter will remain stationary and the needle can penetrate the cloth. If now
the worm g in its further rotation is slid a like distance in the reverse direction
its proper rectilinear motion added to the effect of rotation on the worm wheel
causes the latter to be rotated a whole tooth.
According to my present invention I use in combination with the before-
mentioned device improved means for varving the length of stitch.
In one form of my present invention as illustrated in Figures 1 and 2 I com-
bine with the worm wheel d a tooth wheel which transmits the rotation through
an intermediate wheels to the shaft e of the feed roll a. The shaft c carries several
connected change wheels 1 2 3 (or more if desired). Each of these change wheels has
a ring or collar q against which a projection of the swing frame 1 bears for the
purpose of determining and maintaining the proper gearing distance between the
acting change wheel on the shaft c and the intermediate wheel s which is mounted
The
on a stud in the swing frame and is kept in gear by the spring 2.
change wheels 23 are capable of vertical displacement on the shaft c to which
In order to change
they are secured by a set screw or other convenient means.
the length of stitch it is only necessary to raise or lower the change wheels on
C

page_text: the shaft c so as to bring the desired wheel into gear with the intermediate
wheels when the projection will set the wheels at the proper gearing depth.
In a modification of my said invention as shown in Figures 3 and 4 the change
wheels are permanently 'secured to the shaft c of the feed roll a with the
largest wheel uppermost. In this case the intermediate wheels is mounted on
a bush s¹ which is vertically adjustable on the stud carried by the swing frame u.
The width of the teeth of the intermediate wheels is equal to that of the com-
bined change wheels 123 on the shaft c. The swing frame is secured in
position by a tightening screw p. To change the length of stitch the screw p
rs slackened and the swing frame is pushed aside as far as may be required to
shift the intermediate wheel to the desired change wheel when the swing frame
is again secured. The increased depth of the intermediate wheels enables it
to remain in gear with wheel t.
Alternatively I may dispense with the compound change wheels 12 and use
only a single change wheel on the shaft c. In this case when it is desired to
alter the length of the stitch this single change wheel is removed from the
shaft and is replaced by another of greater or less diameter which may be pro-
vided with a setting ring or collar for the projection to hear against or it
may be used without a setting ring or collar in which case the swing frame u
is secured by a screw as in Figure 4. In this modification the intermediate
wheel need only be as deep as the change wheel with which it has to gear.
'
'
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
1. In a seaming machine the combination and arrangement with one of the
feed rolls of the rotating and longitudinally displaceable worm g, the worm
wheel d, having on its face a cog wheel t, the intermediate wheels mounted on
a swing frame u, and one or more change wheels mounted on the shaft c
of one of the feed rolls and capable of vertical adjustment for changing the gear
for the purpose of imparting a variable intermittent motion to the feed rolls
and thus altering the length of stitches substantially as set forth and described
with reference to Figures 1 and 2 of the 'accompanying drawings.
1
2. In a seaming machine the combination and arrangement with one of the
feed rolls of the rotating and longitudinally displaceable worm 9, "the worm
wheel d, having on its face a cog wheel t, one or more change wheels
mounted on the shaft c of the feed roll, and the intermediate wheels mounted
on a swing frame so as to be capable of vertical adjustment for changing the
gear for the purpose of imparting a variable intermittent motion to the feed rolls
and thus altering the length of stitches substantially as set forth and described
with reference to Figures 3 and 4 of the accompanying drawings.
3. In a seaming machine the combination and arrangement with one of the
feed rolls of a rotating and longitudinally displaceable worm 9, the worm wheel d
having on its face a cog wheel t, and a change wheel 1, mounted on the shaft
of the feed roll so that it can be taken off to be replaced by another, the inter-
mediate wheels, mounted on a swing frame u, the position of which may, be
altered according to the size of the cog wheel to allow the said interniediate
wheels to gear with the change wheel
intermittent motion to the feed rolls and
stantially as set forth and described.
Dated this 20th day of March 1900
for the purpose of imparting a variable
thus altering the length of stitches sub-
E. T. WHITELOW, A.M. Inst. C.E.,
70, Deansgate, Manchester, Agent for the Applicant.