Improvements appertaining to Shedding-mechanism for Looms.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements appertaining to Shedding-mechanism for Looms.
We, THOMAS TIMOTHY RHODES GREGG, of 18, Bridge Street, Bingley, in the
County of York, Clerk, and WILLIAM CRABTREE, of 11, Dubb Row, Bingley afore-
said, Warp Dresser, do hereby declare the nature of this invention to be as
follows, that is to say:
-
In the production of the many and varied classes of woven fabrics it is often
found desirable that the selvages should be differently woven to the body of the
piece or that they should be of a different design thereto, while it is also often
found desirable to produce a stripe in the centre, near the edges or in some other
position in the piece of a similarly different character to the other parts of same.
To produce mechanism of simple construction and at comparatively little cost
by the application of which these said functions may be effectively performed is
the object of our present invention.
This object we attain by mounting a series of levers in such a part of the loom,
either above or below the warp, as the threads that have to be operated by them
in said warp may require. And to each of these levers we pivotally connect a
wire or needle having an opening or hole at or about its central part for the pas-
sage therethrough of one or several warp threads as it may be desired for it to
demand.
operate or as the design to be produced may
These levers are further formed, preferably by having appropriate protuberances
near their fulcrums, so that they may be operated or raised by a rotary peg-barrel
or prepared cards (metal or otherwise) carried by a barrel having reciprocatory as
well as rotary motion transmitted to it, or any similarly formed pattern surface
may be employed for thus raising said needles and their threads, their return
motion being effected by gravity.
Or in place of said pattern barrel a duplex cam barrel may be employed for
acting upon the needles as described.
Rotary, intermittent and any other movements that are to be transmitted to
said barrels or cams may be derived by ratchet, pawl, eccentric or other mech-
anism operated by or from any prime motor part of said loom
understood.
as will be
When more than one series of levers are used in one and the same loom, as
would be the case provided both selvages or borders of the piece were to be
treated, we may either couple said levers together or otherwise so that one and the
or we may
same pattern barrel, or series of cams may operate them,
employ a separate pattern barrel, or series of cams for every separate
series of levers and these may either have each of them their respective

page_text: operating mechanism, or they may be coupled together or mounted on one shaft
to be moved simultaneously by one set of such operating mechanism.
1
T
er
1900
T. T. R. GREGG.
W. CRABTREE,
Per Samuel Hey,
Agent.
Improvements appertaining to Shedding-mechanism for Looms.
We, THOMAS TIMOTHY RHODES GREGG, of 18, Bridge Street, Bingley, in the
County of York, Clerk, and WILLIAM CRABTREE, of 11, Dubb Row, Bingley afore-
said, Warp Dresser, 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, that is to say:-
In the production of the many and varied classes of woven fabrics it is often
found desirable that the selvage should be differently woven to the body of the
piece or that they should be of a different design thereto, while it is also often
found desirable to produce a strip in the centre, near the edges or in some other
position in the piece of a similarly different character to the other parts of same.
To produce mechanism of simple construction and at comparatively little cost
by the application of which these said functions may be effectively performed, is
the object of our present invention, and in order that our said invention may be
readily understood, we have hereunto appended sheets of drawings illustrative
thereof, in which :-
:-
Fig. 1 is an end elevation of a sufficient portion of a loom to show the applica-
tion thereto of our invention.
Fig. 2 is an elevation of certain of the parts shown by Fig. 1 and as seen in
the direction of the arrow, and may be taken as being in the centre, or near the
ends of the frame of the loom.
Fig. 3 is a sectional end elevation showing a pattern cylinder and our improved
parts in connection therewith.
Figs. 4 and 5 are similar views to Figs. 1 and 3 respectively, but illustrate a
modification of our invention.
Fig. 6 is a similar view to Fig. 3, and shows the form of needle for use when
our improved mechanism is mounted beneath the warp.
Fig. 7 is a view of the parts shown by Fig. 6 as seen from above.
Similar letters and figures indicate similar parts throughout the several views.
The object of our invention is attained by mounting a series of levers a on the
shaft carried by the bracket c fixed to the framework A, and in such a part of
the loom, either above the warp, as shown by Figs. 1, 2, 3, 4 and 5, or below
the warp as illustrated by Figs. 6 and 7, as the threads that have to be operated
in said warp may require. To each of these levers a we pivotally connect, a
wire d (see Figs. 1 and 2) or needle (see Fig. 6) having a hole or opening dat
or about the central part or upper end respectively for the passage therethrough
of one or several warp threads as it may be desired for it to operate or as the
design to be produced may demand.
These levers a are further formed, preferably by having appropriate protuber-
ances a near their fulcrums b, so that they may be operated or raised by a rotary
barrel 1 having lags 2 and pegs 3, or prepared cards 4 (metal or otherwise), in

page_text: which, holes or openings are formed for the pegs a² on the levers a to take into
the same being carried by the barrel 5 having reciprocatory as well as rotary
motion transmitted to it, may be made use of, or any suitably formed pattern
surface may be employed for thus raising said wires d or d¹ and their threads,
their return motion being effected by gravity.
Intermittent rotary motion is transmitted to the barrel 1 by means of the
eccentric e, lever f, pawl g and ratchet wheel, while reciprocatory as well as
intermittent rotary motion is imparted to the barrel 5 through the eccentric e,
lever arm k, rock shaft y, lever arms m (in which is mounted the shaft p¹ carrying
the barrel 5) ratchet g₁ and ratchet wheel h¹, said ratchet g¹ being kept in proper
position for acting on said ratchet wheel h¹ by means of the spring q and stop
piece q¹.
Or these movements of the pattern barrels 1 and 5 may be transmitted thereto
by any ordinary eccentric, ratchet pawl or other mechanism operated by or from
any motor part of said loom as will be understood. The said pattern barrels 1
and 5 are held in proper position on their shafts and p¹ for operating on the
levers a by the well known arrangement of T hammer r, springs and star
wheel t, as shown in Fig. 2.
When more than one series of levers a are used in one and the same loom, as
would be the case provided both selvages or borders of the picce were to be
treated, we may have a separate pattern barrel for every separate series of levers a,
and these may either have each of them their respective operating mechanism, or
they may be coupled together, or mounted on one shaft p or p¹ to be moved
simultaneously by one set of operating mechanism.
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:-
-
Mechanism for operating sections of warp threads in looms the same being con-
structed and arranged to operate substantially as herein specified.
T. T. R. GREGG.
W. CRABTREE,
Per Samuel Hey,
Agent.