Improvements in Edging and Overseaming Machines.
Year: 1893

page_text: Date of Application, 23rd Jan., 1893
Complete Specification Left, 21st Oct., 1893—Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Edging and Overseaming Machines.
We, EMILE CORNELY and ROBERT CORNELY of 87 Faubourg, St. Denis,
Paris, France, Manufacturers of Sewing Machines, do hereby declare the nature
of this invention to be as follows:-
The present invention relates to improvements made on the machine patented
November 21st 1888 No. 16937.
Fig. 1. represents an elevation of the machine.
Fig. 2. represents a plan of the operating parts for producing the seam on the
under side of the material.
Similar parts are designated with the same letters of reference as in patent
No. 16937 of 1888.
It was found that the parts which operate. the oscillating thread carrier F
were too heavy and thus prevented the machine to be operated with the desired
speed. For this reason the arrangement of the parts was modified in such a manner
that the pitman L of lever K drives the small toothed sector N which acts directly
on the small bevel pinion O which operates pinions R, S, T and H on which latter
the oscillating thread carrier F is secured, and thus owing to the small sizes of said
parts and to their particular arrangement the machine can be driven at a high
speed.
To produce the seam on the under side of the material the arrangement of the
operating parts is adopted as described and represented in Patent No. 1705 of
January 30th 1891 at Figs. 6 and 7 of said Patent and the similar parts on the
present drawings are designated by the same letters of reference as in No. 1705
of 1891, and their operation need therefore not be repeated.
The operation of the toothed sector 66 is effected from the main shaft H2 by
means of pinions 11 and 12 which latter is of double the diameter of pinion 11 and
which turns shaft 13, cam P acting on friction roller d and lever Q. Thus the
threads of the looper tubes h, i which are hooked into the needles A, B produce
two rows of chain stitches into which the thread of the oscillating thread carrier
is laid on the under side of the material, thus producing on said under side the seam
represented at Fig. 2 of Patent No. 1705 of 1891, while on the upper side the
seam represented at Fig. 16 of Patent 16937 of 1888 (above mentioned) is
produced.
The lever Q swings on stud 9.
COMPLETE SPECIFICATION.
Improvements in Edging and Overseaming Machines.
We EMILE CORNELY and ROBERT CORNELY, of 87 Faubourg St. Denis,
Paris, in the French Republic, Manufacturers of Sewing Machines, 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:
Our invention relates to improvements made in the machine described in Letters
Patent No. 16,937 of 1888, and has for object to modify the arrangement of the

page_text: parts which operate the oscillating thread-carrier F, in such a manner that the
machine can be driven at a higher speed than is practicable with the existing
arrangement and construction of such parts.
In order that our invention may be clearly understood reference is had to
accompanying 2 sheets of drawings on which
Figure 1 is a sectional elevation shewing an arrangement in which the toothed
sector is operated by means of a cam and levers,
Figure 2 being a plan shewing the general arrangement of above movement.
Figure 3 is a sectional elevation of a machine in which the toothed sector is
operated by means of bevelled pinions and a cam having a spiral groove.
Figure 4 being a plan shewing the general arrangement of the parts.
Figures 5 and 6 are details shewing the general arrangement for operating and
regulating the feed slide.
Similar parts are indicated by the same letters of reference as in the Specification
and drawings relative to Letters Patent No. 16,937 of 1888.
In the arrangement described in the last-named invention it has been found that
the parts which operated the oscillating thread-carrier F, were too heavy to allow
of the machine being driven at the desired speed. To overcome this difficulty we
have in our present invention, modified the arrangement of the parts in such a
manner that the pitman L of lever K, drives the small toothed sector N, which
acts directly on the small bevel pinion O, which in turn operates pinions R, S, T
and H, on which latter the oscillating thread-carrier F is secured, and thus owing
to the small sizes of the said parts and to their particular arrangement the machine
can be driven at a high speed.
To produce the seam on the underside of the material we adopt the arrangement
of the operating parts as described and illustrated in Letters Patent No. 1705 of
January 30th, 1891, in Figures 6 and 7 of the drawings relative thereto, and the
similar parts on the present drawings are indicated by the same letters of reference
as in No. 1705 of 1891, so that their operation need not be again described.
The operation of the toothed sector 66 is effected from the main shaft H* by
means of pinions 11 and 12 which latter is of double the diameter of pinion 11 and
which turns shaft 13, cam P acting on roller d and lever Q. Thus the threads of
the looper tubes h, i, which are hooked into the needles A, B, produce two rows of
chain-stitch into which the thread of the oscillating thread-carrier x is laid on the
underside of the material, thus producing on the said underside the seam
represented on Figure 2 of drawings of Patent No. 1705 of 1891, while on the
upper side the seam represented in Figure 16 of drawings of Patent No. 16,937
of 1888 is produced.
The lever Q swings on stud g.
The toothed sector 66 can also be operated in the manner represented in Figures 3
and 4, where shaft 13 turns pinions 67 and 68, shaft 69 and cam 70. This cam 70
is provided with a groove, into which projects the arm 71 of sector 66.
In Letters Patent No. 16,937 of 1888 an arrangement was described for the
purpose of increasing the length of the stitches of the angles of the arcs of the
edging work and of reducing the length of the stitches in the centre of the arcs.
Figures 3, 5 and 6, of annexed drawings represent an improved arrangement
which works in the following manner :-
The crank-handle of the machine turns pinions 28, 72, shaft 73, pinions 74, 75, 76
and 77. Pinion 77 drives a grooved cam 78 into which projects a stud 80 which is
secured to lever 81. This lever 81 swings on its centre 82 and is provided at its
other end with a screw stud p which acts upon the feed slide as described in Letters
Patent No. 16,937 of 1888.
When a cord or filling is to be sewn into the overseaming work it can be guided
by means of the cording guide D which is secured to the part G of the feed
motion of the machine, and which can be turned by the crank-handle and will
thus be always guided in between the two needles in conformity with the direction
of the feed.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what we
claim is
1. An overseaming machine producing the overseaming stitches on both sides of
the material, substantially as herein illustrated and described in Figures 1 and 2.
2. In an overseaming machine, the manner of operating the parts which produce
the seam on the underside of the material, by means of mechanism substantially*
as herein described in Figures 1 and 2.
T
of October 1802