IMPROVEMENTS IN OPERATING SEWING AND OTHER TREADLE MACHINES
Year: 1874

page_text: LETTERS PATENT to Edmund Wright, of Evesham, in the County of
Worcester, for the Invention of "IMPROVEMENTS IN OPERATING SEWING
AND OTHER TREADLE MACHINES.”
Sealed the 16th October 1874, and dated the 25th August 1874.
COMPLETE SPECIFICATION filed by the said Edmund Wright at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 25th August 1874, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDMUND.
WRIGHT, of Evesham, in the County of Worcester, send greeting..
` WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN OPERATING SEWING AND OTHER TREADLE MACHINES," and have petitioned
Her Majesty to grant unto me, my executors, administrators, and
assigns, Her Royal Letters Patent for the same, and have made solemn
Declaration that. I am the true and first Inventor thereof.
"
NOW KNOW YE, that I, the said Edmund Wright, do hereby declare,
that the following Complete Specification, under my hand and scal,

page_text: Tuny. describes and ascertains the nature
UL UC San
what manner the same is to be performed, in and by the following
statement thereof, that is to say:-
The object of my Invention is to produce continuous rotary motion
of the fly or band wheel by the application of two oscillating clutches
constructed, combined, and operated as hereafter described.
In order that my Invention may be more readily understood I have
illustrated it in the accompanying Drawings in which Figure 1 is an
elevation, also shewing a sectional view of one of the clutches; Figure 2,
a side view with the covering plate removed; Figure 3 is a detail,
and Figure 4 is a plan of the ends of the treadles. The same letters
of reference indicate like parts in all the Figures wherever they occur.
A, A, are two hollow pulleys turned with double grooves in each on
their periphery, and fitted to revolve easily on the hollow, spindle B;
C is the centre spindle attached to the frame of the machine X in the
ordinary manner, as shewn; D is the band or fly wheel revolving on
the spindle C, and connected with the hollow spindle B by means of
the extension crank E, or the hollow spindle B may be extended through
the hub of the band wheel D and fastened by means of a pin or set
screw, which is the most convenient method in new machines.
The internal construction and the method of working are shown
more in detail in Figure 2, in which the outer cover or thin plate
attached at a, a, is removed. A portion of the inner bearing of the
hollow pulley A, A, is removed for about half its length, thus exposing
the surface of the hollow spindle B, B. The roller H revolves loosely
on a pin affixed to the pulley A, A, at K, the lever I also being fixed
in a similar manner at 6, and projecting through the pulley A, A, as
shown. The wedge M is inserted between the hollow spindle B and
the roller H. The belt F is attached to the lever I, the other J being
affixed to the pulley A, A, at c in the adjoining groove, and falling on
the opposite side, and from thence carried to the treadles F¹, J¹, below.
On the downward motion of the belt F the pulley A, A, will be moved
from Y to Z. The wedge M will be imperceptibly moved by the lever I,
the tendency of the roller H at the same time being to run to the larger
end. By this means it is obvious that the hollow spindle B will be
firmly locked and revolve from Y to Z with the pulley A, A, carrying
with it the band wheel D, D. On the downward motion of the belt J,

page_text: and the release of the bolt F (which is accomplished by the reciprocating
motion of the treadles), the roller H being carried by the pulley A, A,
runs towards the small end of the wedge M and instantly unlocks tho
hollow spindle B, leaving it free to revolve in one continuous direction.
To cause it to do this it is necessary that one of the clutches should
always be in engagement while the other is free.
:
The peculiar construction of the ends of the treadles, shewn in
Figure 4, allows the belts to fall into right and left hand treadles
without crossing, the belts operating the left-hand clutch being attached
at F, J, and those working the right-hand clutch being attached
at F, J. Now on raising the right-hand treadle and simultaneously
depressing the left, the clutch connected at F, J, is released and
brought back for re-engagement with the hollow spindle B, while the
one connected at F¹, J', is caused to engage and carrics forward the
hollow spindle B, and consequently the band wheel in the desired
direction. The same result is attained on the raising of the left-hand
treadle and depression of the right, continuous rotary motion being
thus obtained. By the simultaneous depression of both treadles both
clutches are at once brought into engagement, thus instantly stopping
thio machine.
In machines where the fly wheel shaft is carried from side to sido
the shaft takes the place of spindle C, the hollow spindle B being firmly
affixed thereto by a set screw placed between the clutches. The exten-
sion crank E is dispensed with, a washer being placed on either side of
the clutches to keep them in the desired position.
Figure 3 is a side elevation of the extension crank E detached. N is
a collar fixed tight on the ordinary crank pin P, and having an arm
at one side fitted to slide on E, which is fastened to the spindle B by a
set screw, as shown.
Having described the nature of my said Invention, and the manner
of performing the same, I declare that what I claim and desire to secure
by Letters Patent is,―
First. The clutclics, constructed, combined, and operated substantially
as herein described and shewn in the accompanying Drawings for the
purposes substantially as set forth.
Second. The combination of the roller H, the lever I, and the wedge M
acting on the spindle B, substantially as herein described.

page_text: Third. The connection of the belts with the levers I, substantially as
and for the purposes herein described. .
Fourth. The extension crank, Figure 4, constructed and combined as
shown for the purpose specified.
=
In witness whereof, I, the said Edmund Wright, have hereunto
set my hand and seal, this Twenty-fourth day of August, in
the year of our Lord One thousand eight hundred and seventy-
four.