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."
COMPLETE SPECIFICATION filed by the said Edmund Wright at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 10th January 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 first and true Inventor thereof.
NOW KNOW YE, that I, the said Edmund Wright, do hereby declare
that the following Complete Specification, under my hand and seal,

page_text: fully describes and ascertains the nature of the said Invention, and in
what manner the same is to be performed in and by the following
statement, reference being had to the accompanying Sheet of Drawings,
and to the letters and figures marked thereon (that is to say) :-
:-
The object of my Invention is to produce rotary motion of the fly or
band wheel of a sewing or other treadle machine, by the reciprocating
motion of the treadles, through the medium of a double clutch and
appurtenances, constructed and combined as shown in the accompanying
Drawings, like letters corresponding with like parts in each.
Figures 1 and 2 are front and side elevations, and Figure 3 is a
sectional view, also showing the method of attachment to existing
machines. H., Figure 1, represents the frame to which spindle I is
fastended in the ordinary manner, and on which revolves the hollow
socket K, K, connected with which and revolving with it are the circular
friction grooves D, D, into which fall the pivoted pawls B, B, whose
radii from their pivoted centres is sufficient to prevent their passing
through the grooves D, D, but against which they are, held in contact
by the springs C, C, both pawls and springs being attached to the pulleys
A, A, as shown in Figures 1 and 2.
'
The small pulley E, suspended by the hanger F, attached to the
spindle I, carries the cord or belt shown by the dotted line c, c, c,
Figure 2, from one to the other of the pulleys A, A, said belt passing
from these to two treadles below, one end being fastened to each treadle.
As thus constructed and combined it will be seen that on alternately
depressing and raising the treadles the pulleys. A, A, will be made to
revolve alternately backwards and forwards on the hollow sockets K, K,
carrying with them the pawls B, B, which by their peculiar wedge like
form cause the circular grooves D, D, to revolve with them on the
forward motion, while they slide over and fail to engage on the backward
motion, their movement being alternate it is obvious that continual
rotary motion of the circular grooves is thus obtained. These may be
attached to the fly or band wheel, by being cast with it (Figure 1) or in
existing machines, by having an eye L cast on the groove D, and
passing over the original pitman carried as in Figure 3 or by other
methods.
Figure 4 shows the method of applying the Invention where a shaft
N having a bearing at either end is made use of, in which case the

page_text: hollow socket K, K, is dispensed with; the pulleys A, A, revolve on the
shaft, and the circular grooves D, D, are firmly attached thereto by the
set screws b, b, the hanger F being screwed to the table above. By
these means a machinist is enabled to operate a sewing machine with
greater ease and less fatigue than has heretofore been practicable, while
the ordinary injurious heel and toe motion is changed to a graceful and
natural one.
Having described the nature of my Invention and in what manner the
same is to be performed, I declare that what I claim as new and desire
to secure by Letters Patent is,―
1st. The combination of the pawls B, B, the springs C, C, and pulleys
A, A, with the circular grooves D, D, and hollow socket K, K, for the
purposes substantially as described.
2ndly. The combination of the hanger F, pulley E, pulleys A, A, cord
c, c, c, with the treadles for the purposes substantially as described.
3rd. The use of a single belt made common by one or more pulleys to
a double clutch of any description for the purposes herein described.
4th. The connection of the clutches to the fly or band wheel, when
such connection is made by an extension of the clutch itself, sub-
stantially as described.
5th. The attachment of the hanger F to the spindle carrying the band
wheel substantially as described.
6th. The use of a pulley when placed below the clutches, substantially
as described.
In witness whereof, I, the said Edmund Wright, have hereunto set
my hand and seal, this Tenth day of January, in the year of our
Lord One thousand eight hundred and seventy-four.
TAK FTTIT
TDTATT
EDMUND WRIGHT. (L.S.)