A Scalloping Attachment for Sewing Machines.
Year: 1892

page_text: COMPLETE SPECIFICATION.
A Scalloping Attachment for Sewing Machines.
We, ALEXANDER GILBERT FORBES and GEORGE WASHINGTON KEMP,
Merchants, both of Montgomery, in the County of Montgomery and State of
Alabama, United States of America, do hereby declare the nature of this invention
and in what manner the same is to be perforined, to be particularly described and
ascertained in and by the following statement:—
This invention relates to improvements in attachments for sewing machines.
The object of the invention is to provide an improved scalloping device which
may be used with other attachments, preferably rufflers, for scalloping the fabric
as it is being ruffled; and it consists in the construction and combination of the
parts, as will be hereinafter fully set forth and particularly pointed out in the
claims.
In the accompanying drawings, forming part of this Specification:
Figure 1 is a perspective view, showing our improved scalloping device applied
to a sewing-machine to which the ruffler has been attached.
Fig. 2 is a side elevation.
Fig. 3 is a vertical section; and
Fig. 4 is a side elevation of a modification.
A designates the presser-bar of a sewing machine, and B the needle-bar. To
the presser-bar and needle-bar we have shown attached a ruffler C, which may be
of any approved construction.
Our improved scalloper is attached to the bed-plate D of the sewing-machine, so
that the reciprocating bar E thereof will move in front of the ruffler. The frame a
of the scalloper has a portion which lies upon the bed-plate of the sewing-machine
and is provided with an aperture a' through which a set-screw passes for attaching
said plate to the bed-plato. The frame a has an upwardly projecting portion which
forms the bearing for a disk F. This upwardly projecting portion, b, has a rectangular
aperture c in which fits the rectangular portion of a retaining bolt d, said retaining
bolt having a stepped head and a threaded end with which engages the thumb-nut d'
said nut bearing against the arm G between which and the plate 6 is interposed &
washere. The disk F is provided on one side with projections f, or with recesses f
either in the form of ratchets f¹, as shown in Fig. 2, or outwardly projecting pins f
as shown in Fig. 4, and with the same engages a spring actuated dog H or Hi
carried by the arm G, so that when said arm is oscillated the dog will engage with
the detents for f¹ to give the disc F a rotary movement.
The arm G is bent as shown and is provided with a loop g or other equivalent
means for engaging the set-screw or other portion of the needle-bar B.
The opposite side of the disk F from the projections f, or recesses f¹ is provided
with apertures i located at different distances from the center of said disk, and
with these apertures a set-screw i¹ is adapted to engage, said set-screw passing
through a slot in the bar I, which bar is attached at its lower end to the recipro-
cating rod E, which is retained in a horizontal position by lugs or ears 6¹. The
rod E has the end thereof which is located forward of the needle-bar and presser-
foot apertured as shown at e' through which the fabric to be scalloped is passed
and from there fed to the ruffler or other attachment which may be applied to the
machine.
In Figs. 1, 2 and 3 of the drawings I have shown the dog H as consisting of a
single plate having a bent end for engagement with the ratchet-teeth f¹. The dog
or pawl H, as shown in the figures above referred to, is preferably made up of a
Bingle piece of flat spring metal the upper end of which is bent slightly outward or
provided with a projecting portion which engages with the ratchet-teeth, and the

page_text: lower end of this spring plate is bent or looped upon itself to engage with an
arm G, and may be rigidly secured thereto by solder or otherwise. The normal
tendency of this spring is to push the outer end to one side so that it will
engage with the ratchet teeth, and in Fig. 4 the identical results are secured
by the employment of a spring-actuated dog or pawl H', which is pivoted to the
arm G, and adjacent to said pivot is a spring for throwing the same in engagement
with the projecting pins f, the upper free end of this dog has a curved end which
rides upon the outwardly projecting pins which are used when such construction is
employed.
Between the disk F and the vertical portion of the frame is interposed a cushion
or friction disk m, which may be of felt, rubber or other suitable material, and
when the parts are placed together the tension exerted by the set-screw and
cushion should be sufficient to hold the disk against rotary movement caused by the
friction of the dog or pawl against the disk when the arm G is moved upwardly by
the needle-bar of the machine. On the downward movement of the needle-bar of
the machine the dog or pawl carried by the arm G engages with the ratchet teeth
so as to give an intermittent rotary movement to the disk in the direction of the
arrows indicated on Figs. 2 and 4 of the drawings.
In operation the scalloper is attached to the machine as shown and the proper
adjustment made by setting the screw in the desired aperture i of the disk. This
adjustment will determine the throw of the rod E and determine the depth of the
scallop. The fabric to be scalloped is passed through the aperture e¹ in the rod
and from there passed into the attachment, as the ruffler, and as the machine is
operated the disk F will be turned and a reciprocating motion given to the rod E.
A guide may be used in connection with this device for piping or welting.
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:
1. An attachment for sewing-machines, consisting of a supporting frame com-
prising a base-plate, an upwardly projecting portion which is apertured for the
reception of a pivot-bolt and outwardly extending portions through which passes
a reciprocating bar having a slotted end, a disk provided centrally with an aperture
countersunk to receive the head of the pivot-bolt, a friction disk located between
the disk and upwardly projecting portion of the frame, a vertical bar having a slot
through which passes a set-screw for holding the same in engagement with the disk,
an actuating arm upon the bolt which connects the disk to the frame, said arm
being bent and provided with means for engagement with the needle-bar of the
sewing-machine, said arm carrying a pawl which engages with the face of the disk,
whereby the vertical reciprocating motion of the needle-bar horizontally reciprocates
the bar E, said attachment being in combination with a ruffler, the ruffler being carried
by the presser-bar, the parts being combined and organized substantially as shown.
2. In a scalloping attachment for sewing-machines, the combination with a
ruffling blade and means for operating it, of the frame made up of a single piece
and provided with an upwardly projecting portion 6 apertured for the reception of
a pivot-bolt, said frame also having outwardly projecting portions b', a disk F
having a recessed aperture in which the bolt lies and a friction disk m, a slotted
bar I connected to the disk by a set screw ¹, the lower end of said bar being
attached to a reciprocating bar E having a slotted end, an actuating arm pivoted
upon the bolt d, said arm being bent and adapted to engage with the needle-bar,
the parts being organized substantially as shown, and for the purpose set forth.
3. In a scalloping attachment for sewing machines, the combination of a base-
plate having an upwardly projecting portion with a rectangular aperture, a bolt
adapted to engage with said aperture and retain upon the upwardly projecting
portion a rotary disk F, a bent arm mounted upon the pivot-bolt, said arm carrying
a. spring pawl which is adapted to engage with the disk F, washers m and e
interposed between the upwardly projecting portion of the frame and the disk F

page_text: and actuating arm, means for adjusting the tension of the parts, a slotted bar I and
Bet-screw for holding the same in engagement with the plane face of the disk F,
said slotted bar being connected to the reciprocating bar E, said bar having at one
end a slot e¹ through which the fabric to be ruffled passes, the parts being organized,
5 substantially as shown, and for the purpose set forth.
Dated this 27th day of September 1892.
FELL & WILDING,
Agents for the Applicants.