Year: 1887

page_text: Date of Application, 26th Apr., 1887.
Specification Accepted, 27th May, 1887.
I, FREDERICK EGGE, residing at No. 107 Park Avenue, Bridgeport, in the State
of Connecticut one of the United States of America, Manufacturer, do hereby declare
the nature of the said 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 certain novel and useful improvements in button-hole sewing
attachments for sewing machines, but has special reference to the manner of securing
the attachment to the sewing machine in the proper position for operation and has for
its object to do away entirely with the ordinary screw fastening devices and to utilize
the construction itself of the sewing machine to accomplish the result aimed at, and
with these ends in view my invention consists in certain details of construction and
combination of clements, hereinafter fully set forth, and then specifically designated by
the claim.
In order that those skilled in the art to which my invention appertains may more
fully understand the same-I will proceed to describe it in detail referring by letter to
the accompanying drawings forming a part of this specification, in which
Fig. 1, is a bottom perspective of the bed plate of a button hole sewing attachment
provided with my improved construction.
Fig. 2, a plan view of the forward end of a sewing machine bed, the raceway slides
being partially withdrawn.
Fig. 3, a bottom view of the same with the attachment secured thereto after my
improved manner and
Similar letters denote like parts in the several figures of the drawings.
A, is the bed-plate of a sewing machine and B, the shuttle or hook raceway slides.
C, is the throat plate and, D, the needle-holo.
The parts thus denoted by letter are the only parts of a sewing machine with which
my invention is identified, and by the term "raceway slides" I mean the covers which
close the opening or openings through which access is had to the shuttle or hook as the
case may be. Furthermore it makes no difference in the application of my improve-
nent whether a shuttle or hook is employed or whether there are one or two slides.
The bed plate of the attachment is denoted by E, and the needle hole thereof by F.
G, is a step secured to or formed with the bed of the attachment and to this step is

page_text: secured a cross bar, H, the extremities of which are slightly curved upward for the
purpose presently explained. The length of this step is preferably equal to the shortest
distance between the throat plate and the rear wall of the raceway.
In adapting my improvement to a sewing machino the raceway slides are partially
withdrawn as shown in Fig. 2, and the bed of the attachment is simply placed on the
bed plate of the sewing machine in such manner that the two needle holes, D, F, will
coincide. The slides are now pushed inward and during their travel will strike against
the under faces of the curved ends of the cross bar, II, and thereby be readily guided
in their further travel underneath said bar. This bar has a slight spring action, which
facilitates the movement of the slides and at the same time causes said bar to have a
strong frictional bearing on the slides so that the latter cannot become displaced by the
vibration or motion of the various parts of the attachment or the sewing machine.
In order to still further insure the firmness of the attachment, the step, G, may be
made of such length as to have an abutment with the rear wall of the race way and
the inner edge of the throat plate; also pins, I, may project from the forward lower
face of the bed-plate of the attachment in such manner that when the latter is in
proper operative position on the sewing machine said pins will lie snugly against the
inner edge of the throat plate, as shown in Fig. 3. However, both the step and pins
are merely auxiliary, since the slides and the bar, H, by actual experiment have proved
amply sufficient to secure the attachment.
I have shown my improvement in connection with the bedplate of a button-hole-
sewing attachment, but it is equally applicable in securing all other attachments that
are capable of being fastened in operative position directly to the bed-plate of the
sewing machine.
In sewing machines in which a hook is used instead of a shuttle there is usually a
single slide and in this instance the bar need extend but in one direction, as the single
slide is capable of securing the attachment.
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:
The combination with the bed-plate of a sewing machine provided with shuttle race
slides, of a sewing machine attachment having upon the under side of its bed plate a
two-way projecting spring cross-bar, the arms of which extend transversely upon each
side of the center of said attachment plate whereby the slides in closed position may
enter between the said spring-bar and the attachment-plate, thereby securing the
attachment to the sewing machine, as set forth.
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