Improvement in Shedding Mechanism of Looms for Weaving.
Year: 1898

page_text: Date of Application, 5th July, 1898
Complete Specification Left, 5th Apr., 1899-Accepted, 17th June, 1899
PROVISIONAL SPECIFICATION.
Improvement in Shedding Mechanism of Looms for Weaving.
DAVID DAVIS HAYHURST, Mill Manager, 31, Carter Street, Accrington, JAMES
LEACH, Overlooker, 184, Richmond Hill, Accrington, do hereby declare the
nature of this invention to be as follows:--
My invention consists of a lamb guard or grid which serves the purpose of
keeping the healds in proper position and thereby their is no oscillation in the
working of the healds. The guard or grid is fastened on the cross rails of the
loom and the lambs work in the fork shaped portion of the guard or grid and
always keep an even shed as they are coupled to the healds by strips of leather
in place of string and always keeps the shed in an even distance whether in hot
or cold atmosphere.
Cantanh 19th 1900
DAVID DAVIS HAYHURST,
31, Carter Street, Accrington.
We, DAVID DAVIS HAYHURST, Mill Manager, 31, Carter Street, Accrington, and
JAMES LEACH, Overlooker, 184, Richmond Hill, Accrington, 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:-
This invention consists of an improved guide or grid, which is designed to
keep the healds in proper position, and prevent oscillation in their working.
Under the present conditions of working, the healds have a tendency to bear
against each other, especially in broad looms, chafing the heald bands, which do
not last as long as they otherwise would, and also having a detrimental effect
upon the warp threads, which thereby often break in the course of manufacture
into cloth.
Our lamb guide preferably takes the form of a grid, or forked piece of metal
or other material, the lambs or horizontal wood bars, to which the usual lamb
rods are secured, which connect them to the treadle levers, working in the inter-
stices or spaces betwixt the respective prongs or bars of the grid. In this way,
the lambs are compelled to move perfectly straight in the guide or grid in a direct
or vertical line, and all tendency to oscillate is entirely overcome. By the term
"lamb" we mean the horizontal wood bar, to which each heald or stave is re-
017

page_text: spectively attached, and which is connected to each treadle lever by a rod,
known as the "lamb rod."
The guide or grid is preferably fastened to the cross rail of the loom by bolts
or the like, and for the purpose of keeping an even shed, we dispense with the
usual cord attachments between the lambs and the healds, and in substitution
thereof employ a leather strap, capable of adjustment by having a number of
holes at one end. For securing the leather strap to the lamb, we employ a
spike having a point at each end, one of the points being driven into the timber
of the lamb. One end of the leather strap is formed with a hole, which is passed
over the pointed end of the spike, and the strap is then carried round the lower
stave of the heald, when it is afterwards returned to the lamb, and drawn tight,
and finally secured by one of its adjusting holes at its end on to the aforesaid
spike.
Our invention will be made clear by reference to the accompanying drawings,
in which
Fig. 1 is an elevation of our guide or grid for directing the movement of the
lambs of shedding motions, and
Fig. 2 is a sectional elevation of a lamb and lower stave of a heald, shewing the
method of connecting the same by the adjustable leather strap as described.
Referring to Fig. 1, A is our guide or grid secured to the cross rail B of the
loom by means of the bolt C and nut D, and provided with the slot E, so that
the height of the grid may be adjusted as circumstances require.
The grid or guide is provided with prongs or forked ends F, and in the
interstices between them work the lambs G shewn in section, which are thereby
steadied in their movement.
As will be seen in Fig. 2 in place of the usual cord attachment for securing
the lambs to the lower staves of the healds, we employ the leather band H,
which is secured to the lamb J by means of the spike K, driven or screwed into
the timber or material of the latter. A hole in end of the leather band H is
pushed over the said spike, and the band is then carried round the end of the
lower stave L of the heald, and returned to the lamb, when it is drawn tight,
and secured thereto by its other end, in which a number of holes M are formed
for attachment as shewn.
This provides a ready method of attaching the staves to the lambs.
To prevent confusion, in neither Fig. 1 nor Fig. 2 have we shewn the usual
lamb rod for connecting the lamb to the treadle lever of the tappet motion, this
being of the usual construction.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is :-
1. The guide or grid, or equivalent, for steadying lambs in shedding motions
of looms, and maintaining their movement in a direct or vertical line, substan-
tially as described and illustrated in Fig. 1.
2. The improved means or method of connecting or attaching staves of
shedding motions to the lambs, substantially as described and illustrated in
Fig. 2 for the purpose set forth.
3. In shedding motions of looms, the combination of a lamb guide as shewn
and described, and means for attaching or connecting the lambs to the staves
of healds, substantially as described and illustrated in Figs. 1 and 2.
T
1 1000
RICHMOND Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.