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Патент USA US2105357

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Jan. 11', 1938.
Original Filed Feb. 10, 1936
3 Sheets-Sheet 1
Paul ‘P. Kessler
Jan. 11, 1938.
Original Filed Feb. 10, 1936
3 Sheets-Sheet 2
Trim vrR.
Jan. 11, 1938.
Original Filed Feb. 10, 1936
3 Sheets-Sheet 3
BY 9
%/z‘ . ‘
Patented Jan. 11, 1938
Paul P. Kessler, Chicago, 111.
Original application February 10, 1936, Serial No.
63,048. Divided and this application May 5,
1936, Serial No. 78,051
4 ‘Claims. (01. 112-214)
This'is-a divisional application from the orig
thickness is to be sewed to another piece of a
inal ?led on February» 10, 1936, Serial-Number different thickness and said pieces are placed
63,048 for Sewing machine.
edge to edge on my feeding mechanism each of
My invention relates to a feeding mechanism
Among the objects of
5 for a sewing. machine.
my invention are the following: To create a sew
ing machine having, dual feed rollers in which
each of said feed rollers is independently and
automatically’ adjustable regardless of the ma
terial of different thicknesses fed simultaneously
my two feed rollers will automatically and sepa
rately yield on their respective ball shaped bear CI
ings to compensate for the different thicknesses
of the material. For example, when a thick piece
of goods is to be sewed to a thin piece of goods
so that the thin piece of goods isfed by one roller
and the-thick piece of goods is fed by. the other 10
roller, one roller will apply pressure to the thin
piece of goods separately from the other roller
to each of said feed rollers, so that said different
thicknesses of material may be sewn simultane
ously together ‘edge to edge. To supply a sewing 'which will move on its bearing to accommodate
machine so constructed that it can be shifted‘ the thick piece of goods so that both pieces are
15 from a ratchet-regulation to a clutch regulation accommodated and receive substantiallythe same
and vice versa, thereby providing a machine
adapted to create various sizes of stitches, and
such other objects, advantages and capabilities as
will later more fully appear and which are inher
ently possessed by my invention.
While I have shown in the accompanying draw
ings a preferred embodmient of my invention, yet
I wish it understood that the same is susceptible
of modi?cation and change without departing
from the spirit of my invention.
Referring to the drawings, Fig. 1 is a front
feed pressure during the sewing operation. With
my device there is even feeding regardless of dif
ferent thicknesses of goods fed to either of the
two rollers. My rollers 24 and 25 furthermore
are movable together against the action of 20
springs 82, so as to accommodate different thick
nesses of material to be sewed.
My invention also comprises two distinct stitch
elevation of the sewing machine embodying the
controls, one is a stitching regulator by ratchet
movement and the other is a stitch regulator by 25
clutch control. My machine is so constructed
that I can shift from the ratchet regulator to the
features of my invention. .Fig. 2 is a vertical sec
clutch regulator and vice versa, thereby providing
tion of my feeding mechanism. Fig. 3 is a frag
mentary side elevation showing my roller clutch
mechanism. Fig. 4 is a front view showing the
feeding plate in position for edge to‘ edge sewing.
Fig. 5 is a side elevation of my sewing machine
embodying the features of my invention. Fig. 6
35 is a detailed view of my feeding mechanism.
In the embodiment selected to illustrate my
invention the lower portion H of the frame ll]
of a sewing machine houses the feeding mecha
nism 31 which comprises the combination of a
roller structure 2 I, a ratchet 35 and a roller clutch
mechanism 23. My roller structure 2| includes a
pair of rollers 24 and 25. An adjustable center
guide 26 is placed between the rollers 24 and 25.
My rollers 24 and 25 are, of course, driven as one
45 unit but they are separately and automatically
adjustable to accommodate different thicknesses
of cloth to be fed by the rollers for the sewing
operation. Eachiof my rollers 24 and 25 has a
hollow portion 21 adapted to receive a ball shaped
50 bearing 28. Each of said rollers has its hollowed
out portion 21 extended to form a pair of oppo
sitely disposed grooves 29 to receive a pair of op
positely disposed driving pins 30 of the ball
shaped bearing 28. It will be noted that in oper
55 ation when a piece of goods having a certain
a machine adapted to ‘create various sizes of
An eccentric 32 is mounted on the upper por
tion l2 of the frame I 0 and has an arm 61 ex
tending downwardly which is pivoted to a ratchet
connection 33 which passes through the lower
bed II and in turn is pivoted to a ratchet mem
ber 34 for operative engagement with a ratchet
wheel 35 of the feeding mechanism 31. The arm
61 at its lower end is provided with a screw 39
which is adjustably secured within a slot 38 in
the ratchet connection 33. Said member 39 40
may be set within slot 38 at certain desired posi
tions for shortening and lengthening the stitch.
Actuated by an eccentric on the drive shaft sup
ported on the upper portion I2 is a member 40
which is connected to a different adjustable con 45
nection 4| which contacts and actuates‘ a clutch
roller 23 attached to the roller mechanism 2|.
With my roller clutch 23 the operator may obtain
any desired length of stitch at his discretion,
within the limits of adjustment of set screw 86 '
within slot 81.
When the ratchet mechanism is used there are
three separate and distinct sizes of stitches, each
one of which may be chosen by the operator.
When the screw 39 is in the outermost position in 55
slot 38, the ratchet carrier feeds to the extent
on its bearing automatically and independently
of one notch of the ratchet; when the screw 39 is
in an intermediate position in slot 38 the ratchet
from the other roller to accommodate material of
a di?erent thickness than that fed simultaneous
carrier feeds to the extent of two notches of the
ratchet; and when the screw 39 is in the inner
1y to the other roller.
most position in slot 38 the ratchet carrier feeds
2. A feeding mechanism for sewing machines
comprising a pair of ?exibly connected and in
to the extent of three notches of the ratchet.
dependently yieldable feed rollers rotatably jour
When the, roller clutch mechanism is employed
naled in vertically movable supports, and yield
the stitch is not set or de?nite but may be regu
able means operatively engaged with said sup
10 lated bythe discretion of the operator from the
smallest up to a maximum point depending upon ), _ . 3. A feeding mechanism for a sewing machine
the adjustment of the adjustable connection 4L1~ comprising rotary drive means, a feed roller
' ‘ driven by and having a universal connection with
The reverse operation is obvious.
The ratchet mechanism is disconnected by said drive means, and a second feed roller driven
manually turning a lever 90 attached to the‘ by said first roller and having a universal con 15
lower bed H adjacent ratchet-arm 34 so that nection therewith.
lever 90 moves said ratchet arm 34 to a posi
tion out of engagement with ratchet wheel 35.
When lever 90 is moved back spring .91 pulls
ratchet arm 34 back to normal position so that
it engages ratchet wheel 35 for operation.
The roller clutch mechanism may be made in
operative by the user by positioning the set screw
86 in the lowermost part of slot 81, which places
it in dead center so that the driving mechanism
88 does not operate.
Having thus described my invention, I claim:
1. In a sewing machine a pair of feed rollers,
each of said feed rollers having a hollow portion,
and a pair of oppositely disposed grooves, a ball
shaped bearing, having a pair of oppositely dis
posed driving pins, saidv bearing and said pins
4. In a sewing machine, a roller feed member,
a ratchet wheel and roller clutch operatively
connected with the roller‘ feed member, a drive
shaft, a pawl for actuating said ratchet wheel,
adjustable means driven by said drive shaft and
operatively connected with said pawl, drive con->
nections between said drive shaft and said roller
clutch, means for throwing said pawl into and
out of driving engagement with said ratchet 25
Wheel and means for throwing said drive con
nections into and out of driving connections with
said roller clutch, said roller feed member ad
vancing the fabric for predetermined length of
stitches when operated by said ratchet wheel and 30
pawl mechanism and advancing the fabric for
lengths of stitches intermediate said predeter
adapted to ?t into the hollow portion and grooves > mined lengths when operated by said roller
of said rollers, said rollers being driven as’ a
unit and each of said rollers adapted to yield
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