Improvements in and connected with Picking-motions of Looms for Weaving.
Year: 1895

page_text: Date of Application, 2nd Jan., 1895
Complete Specification Left, 2nd Oct., 1895-Accepted, 2nd Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in and connected with Picking-motions of Looms for
Weaving.
I, JOHN POYSER, of Peck's Hill, Sherwood Road, Mansfield, in the County of
Nottingham, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to looms for weaving and more particularly to looms of the
kind described in the Specification of former Letters Patent granted to me
No. 193 of 1894 wherein I describe a cam for positively moving the shuttle through
the shed.
According to my present invention instead of using a cylindrical cam as described
in the Specification before referred to I make use of a segmental cam.
In carrying my invention into effect when applying it to narrow-ware looms,
I provide a suitable race or guide for the shuttle having a central gap or opening
through which the warp threads pass when they are raised and lowered under the
action of the healds or heddles, and a segmental cam, oscillating upon a central
axis and preferably in two parts having a gap or space between them coinciding
with that in the shuttle-race or guide, and having a groove or grooves in its face
or periphery adapted to engage with a projection or projections or a roller or
rollers upon or in connection with the shuttle in such manner that the said roller
or rollers or projection or projections enters or enter one part of the cam-groove
before leaving the other, the shuttle being thus always in engagement with its
actuating cam.
I may oscillate the actuating cam by means of a crank upon the driving shaft
of the loom, and suitable connecting rods and levers, or in any other convenient
manner.
When adapting my invention to a loom for weaving wide fabrics, I prefer,
instead of forming the shuttle-actuating cam in two parts having a gap or space
between them for the passage of the whole of the warp threads, to build it up
of a number of plates or laminæ having distance pieces between them, the distance
pieces forming spaces, in each of which one or more warp threads pass when moved
up and down under the action of the healds or heddles, the cam groove or grooves
being cut in the edges of the plates, and I form the shuttle guide or race of plates
and distance pieces in the same manner so that the warp spaces in the shuttle-
guide coincide with those in the shuttle-actuating cam, by which means a free
passage is afforded for the opening and closing of the shed, and at the same time
the shuttle is always in positive engagement with its actuating cam.
Dated the 2nd day of January 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.

page_text: Improvements in and connected with Picking-motions of Looms for
Weaving.
I, JOHN POYSER, of Peck's Hill, Sherwood Road, Mansfield, in the County of
Nottingham, Engineer, 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 :-
My invention relates to looms for weaving and more particularly to looms of the
kind described in the Specification of former Letters Patent granted to me
No. 193 of 1894 wherein I describe a cam for positively moving the shuttle through
the shed.
According to my present invention instead of using a rotating cam as described
in the Specification before referred to I make use of an oscillating cam.
To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawings, in which :-
Figure 1 is a side elevation of a narrow-ware loom provided with my
improvements:
Figure 2 is a plan of the same:
Figure 3 is a fongitudinal section of the front part of the loom :
Figure 4 is a transverse section on the line 4-4, Figure 2:
Figure 5 is a development of the cam shewn in Figures 3 and 4 :
Figure 6 is a longitudinal section shewing my improvements in connection with
a loom for weaving wide fabrics; and,
Figure 7 is a front view partly in section of the same.
Similar reference letters indicate corresponding parts throughout the drawings.
I will first describe the narrow-ware loom shewn in Figures 1 to 5.
a is a suitable race or guide for the shuttle having a central gap or opening a
through which the warp threads pass when they are raised and lowered under the
action of the healds or heddles, the said parts being similar to those described in
the Specification of the said former Letters Patent. c is my cam adapted to
oscillate upon a central axis by means of a shaft d and preferably in two parts
having a gap or space e between them coinciding with that in the shuttle race or
guide a, and having grooves f, f in its face or periphery which terminate near the
ends of the cam and are adapted to engage with rollers y, g (or projections) upon or
in connection with the shuttle in such manner that one of the said rollers or the
like enters one of the cam-grooves on one part of the cam before leaving the
groove on the other part in a similar manner to that described in the said former
Specification, the shuttle b being thus always in engagement with the cam.
The cam is advantageously operated from the driving shaft of the loom by
means of a crank i, connecting rod j and lever k attached to the shaft d.
By constructing the cam with terminating grooves of the shape shewn, it will be
understood that, by imparting an oscillating movement to it, the shuttle 6 will
be reciprocated from side to side of the loom through the shed. This construction
also allows the cam to be of a segmental form, as shewn, instead of cylindrical as
in the said former Patent.
In a loom for weaving wide fabrics as shewn in Figures 6 and 7, I build the
came in a similar manner to that described in the said former Patent, that is to
say, of a number of plates or lamina 1, 1 having distance-pieces m, m between them,
the distance pieces forming spaces n, n in each of which one or more warp threads
pass when moved up and down under the action of the healds or heddles, the cam
groove which is of a spiral form [and terminates near the ends of the cam being
cut in the edges of the plates 1, 1. I also form the shuttle guide or race of

page_text: plates o, o and distance-pieces p, p in the same manner and corresponding to that
described in the said former Patent so that the warp spaces in the shuttle-guide
coincide with those in the shuttle-actuating cam c, by which means a free passage
is afforded for the opening and closing of the shed, and at the same time the shuttle
is always in positive engagement with the cam c.
In this arrangement the cam c is driven from the rod ; through the medium of a
toothed quadraut q and pinion r upon the cam shaft d.
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 I
claim is :-
1. In a loom for weaving in which the shuttle is reciprocated positively through
the shed by means of a cam having grooves engaging with rollers or projections
on the shuttle, forming such grooves in such a manner that the said reciprocating
motion is produced by an oscillating motion of the cam, substantially as
described.
2. The improvements in looms for weaving hereinbefore described and illustrated
in Figures 1 to 5 and Figures 6 and 7 of the accompanying drawings.
Dated this 2nd day of October 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.