other Machines
Year: 1887

page_text: other Machines.
CORNELIUS MUNDY 14 College Avenue Leicester Mechanic do hereby declare the
nature of this invention to be as follows:-
-
This Invention, relates primarily to a Scissor Trimming Attachment, for clipping
the edges of fabrics or dividing the same as may be desired, as the fabric is passing
through the Sewing Machine, or other machinery as the case may be; and its main
object is to embody in a Trimming Attachment the Scissor principle in a superior
manner. The Trimming Attachment consists of a scissor like pair of blades having a
central axis in the form of a screw or stud secured to the needle plate of the Sewing
Machine and adjusted so as to cut a given distance from the edge of the fabric, or to
bring the blades into closer contact by means of washers and lock nuts. The said
scissor blades carry at the cutting ends two adjustable knives, which are secured, and
adjusted by screws, and may be removed for regrinding &c. at pleasure without
removing the whole attachment.
These knives may be of any desired form to suit any peculiar fabric for the cutting
of which they may be applied. The power ends of the said scissor blades have forked
cams for receiving the motive power to actuate them, which motive power may be
applied in an angular or a parallel direction, and may or may not be in a true circular
or parallel line with the axis of the scissor blades.
The aforesaid forked cams may be cut in any lines to suit the direction of motive
power applied, or to give such a quantity and proportion of motion to the scissor
blades as may be desirable to cut any particular kind of fabric, that is, the said forked
cams may be cut so as to give motion to one or the other of the blades only, while the
opposite blade is held stationary, or more or less motion may be given to one or the
other of the blades or an equal amount to both as may be desired.
The said scissor blades when attached to a Sewing Machine may be secured to the
needle plate of the same, which needle plate has on the underneath side a lug & which
lug may be solid or attached by screws for the purpose of receiving the aforesaid
screw or stud upon which the ścissor blades act.

page_text: For the purpose of conducting motion to the scissor blades a quadrant, is employed,
secured to a rock shaft, which rock shaft may or may not be apart of the feed mechanism.
The said quadrant carries two anti-friction rollers on a stud secured thereto, which are
placed within the forked cams of the scissor blades, so that when the said rock shaft is
moved, motion is given to the scissor blades simultaneously.
In cases where a suitable rock shaft is not to be found the said quadrant is secured
to the bed plate of the machine on the underside by means of a screw, and is connected
with the feed bar of the machine by means of a link so that when the feed is moving
the fabric onward the scissor blades are opened to receive it, and when the said feed is
returning the blades are closed and thus cut the fabric.
Having now described the several points of this Invention, it being of course
understood that there are other, matters of detail to which 1 have not thought it
necessary to refer, I would now have it understood that what I claim to be new
and novel in this said, invention of a Scissor Trimming Attachment and as applied
thereto is.-
1st. The combination in a Trimming Attachment of two moveable scissor blades
having a central axis and constructed as before described in a manner so that the
quantity and proportion of motion given to each blade may varied through the
medium of the forked cams without altering the principle of the construction.
2nd. The combination in a Trimming Attachment of a needle plate having on
the underside a lug which may or may not be solid and to which the scissor blades
are secured as hefore described and so put into position for working with the needle
plate or removed therewith entirely from the machine.
3rd. The combination in a Trimming Attachment of a quadrant carrying two
Anti-friction rollers for the purpose of conveying motion to the aforesaid scissor blades
as before described.
4th. The combination in a Trimming Attachment of a quadrant and link combined;
the quadrant not acting in this case as the moving power but guiding the said link in
its proper path, the said link being moved by the feed bar.
5th. The combination of a Trimming Attachment fixed, and actuated entirely
beneath the bed plate of the machine, thus obviating all obstruction to the passing of
the fabric.
6th. The combination of a Trimming Attachment having only its upper blade.
rising above the bed plate of the machine, thus enabling tlie said Trimming Attach-
ment to be used for dividing the fabric in froin the edge, that is, dividing the fabrics
not withstanding the width of the same.
The aforesaid Invention of an Improved Scissor Trimming Attachment as a whole,
and as above described 1 claim to be new and novel, and to be invented by me.
Dated this 29th day of September 1887.

page_text: COMPLETE SPECIFICATION.
An Improved Trimming or Cutting Attachment for Sewing and
other Machines.
I, CORNELIUS UNDY, of 14 College Avenue, Leicester, Mechanic, 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:-
This invention relates primarily to a scissor trimming attachment for clipping the
edges of fabrics or dividing the same as may be desired, as the fabric is passing
through the sewing machine, or other machinery as the case may be; and its main
object is to embody in a trimming attachment the scissor principle in a superior
manner.
In the annexed drawings Figure 1 is a plan of the needle plate with the scissor
attachment. Figure 2 is an elevation showing the scissors closed. Figure 3 is an
elevation with the scissors open. Figure 4 is a front elevation and Figure 5 is an end
elevation, Figure 6 is a section of part of the machine showing the scissor attachment
with the driving mechanism. Figure 7 shows a detail and Figure 8 shows a modifi-
cation of the driving mechanism.
The trimming attachment consists of a scissor like pair of blades a and b having a
central axis c in the form of a screw or stud secured to the needle plate d of the
sewing machine and adjusted so as to cut a given distance from the edge of the fabric,
or to bring the blades into closer contact by means of washers and lock nuts. The
said scissor blades carry at the cutting ends two adjustable knives a¹ and b¹ which are
secured, and adjusted by screws, and may be removed for regrinding &c. at pleasure
without removing the whole attachment.
These knives may be of any desired form to suit any peculiar fabric for the cutting
of which they may be applied. The power ends of the said scissor blades have forked
cams a² 62 for receiving the motive power to actuate them, which motive power may
be applied in an angular or a parallel direction, and may or may not be in a true
circular or parallel line with the axis of the scissor blades.
The aforesaid forked cams may be cut in any lines to suit the direction of motive
power applied, or to give such a quantity and proportion of motion to the scissor
blades as may be desirable to cut any particular kind of fabric, that is, the said
forked cams may be cut so as to give motion to one or the other of the blades only,
while the opposite blade is held stationary, or more or less motion may be given to
one or the other of the blades or an equal amount to both as may be desired.
The said scissor blades when attached to a sewing machine may as is here shown be
secured to the needle plate of the same which needle plate has on the underneath side
a lug and which lug may be solid or attached by screws for the purpose of receiving
the aforesaid screw or stud upon which the scissor blades act.
For the purpose of conducting motion to the scissor blades a quadrant e is employed,
secured to a rock shaft which rock shaft may or may not be a part of the feed

page_text: mechanism. The said quadrant carries two anti-friction rollers on a stud g secured
thereto, which are placed within the forked cams of the scissor blades, so that when
the said rock shaft is moved, motion is given to the scissor blades simultaneously.
The rock shaft may receive movement from the main shaft by means of an
eccentric as shown.
In cases where a suitable rock shaft is not to be found the said quadrant e is carried
in bearings secured to the bed plate of the machine on the underside by means of a
screw, and is connected with the feed bar of the machine by means of a link so
that when the feed is moving the fabric onward the scissor blades are opened to
receive it, and when the said feed is returning the blades are closed and thus cut
the fabric.
Figure 8 shows this method of operating the scissor attachment. The feed bar is
indicated by dotted lines.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed I declare that what 1
claim is :-
1st. The combination in a trimming attachment of two move le scissor blades
.having a central axis and constructed as before described in a manner so that each
blade receives motion through the medium of forked cams.
2nd. The combination in a trimming attachment of a needle plate having on the
underside a lug (which may or may not be solid) to which the scissor blades are
secured, as before described so that the said trimming attachment is put into
position for working with the needle plate or removed therewith entirely from the
machine.
3rd. The combination in a trimming attachment of a quadrant carrying two anti-
friction rollers conveying motion to the aforesaid scissor blades as before described.
4th. The combination in a trimming attachment of scissor like blades; a pin or
fulcrum for the blades fixed beneath the bed plate of the machine and actuating
gear also beneath the bed plate thus obviating all obstruction to the passing of
the fabric.
5th. The aforesaid improved scissor trimming attachment as a whole, and as above
described.
Dated this 28th day of June 1888