Improvements in Lags and Pegs Used as Pattern-chains in Looms for Weaving.
Year: 1889

page_text: Date of Application, 30th Mar.. 1889
Specification Accept d. 4th May, 183
COMPLETE SPECIFICATION.
Improvements in Lags and Pegs Used as Pattern-chains in Looms
for Weaving.
I, KERSHAW JOWETT of Number 2, Clement Street, Snake-hill Lane, Girlington,
Bradford in the County of York, Machine Maker, 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 it relates to improvements in lags and pegs used as pattern-chains in
looms for weaving and consists of forming and constructing same in such a manner
that the inconvenience and damage in the work and material being produced (as in
the piece of cloth &c. being woven) incident to the failing of said pattern-chain to
perform its proper functions by reason of any of the pegs which are carried by the
lags forming said pattern-chain, becoming detached therefrom or coming out after
having worked loose, is entirely avoided.
Such being the nature and object of my said invention, in order that same may be
more readily understood 1 have hereunto appended a sheet of drawings illustrative
thereof, to which, by figures and letters, reference is made in the following description.
Fig. 1 is a sectional side view of a portion of a lag formed in accordance with this
invention, shewing the pegs in connection therewith. Fig. 2 is a view of the underside
of the lag. Fig. 3 is sectional end elevation of fig. 2.
Figs. 4, 5 and 6 are detail drawings illustrating the formation of the peg in
accordance with this invention. Fig 7 is a similar view to fig. 2 but shews a larger
size of lag and otherwise modified as hereinafter described.
Fig. S. illustrates the application of the lag and peg as hereinafter set forth.
The object of this invention is attained by cutting a groove of dove-tail shape in
cross section lengthwise in the lower side of the lag a and making to fit therein the
strip of metal the outer edges of which are bevelled to suit the bevelled or
angular sides of the dove tail groove.
The holes c made in the lag a for the reception of the pegs d, are countersunk to
receive in an appropriate manner the head d¹ of the peg d (said head a' being either
of the shape shewn by fig. 4 or of that shewn by fig. 5, provided that the countersunk

page_text: part in the lag is made to suit each kind of head d' respectively), so that the strip of
metal after the insertion of these said pegs d, may be slided or made to pass along
the groove, by which means all pegs d thus inserted are securely held from becoming
loose or detached in this direction until the said strip bis removed, while their heads d
prevent them from being detached in the other direction, hence they are retained as
desired.
The strip is made to fit with an appropriate degree of tightness within the groove
so that it will not become loose therein and drop out, however should it be inadvertently
made to fit more loosely than desirable, the action of the pegs d which is one of
continued pressure, is such as will tend always to retain or hold it in position.
To facilitate the removal of the strip b, its outer end 2 is turned or slightly bent so
that it may be laid hold of for that purpose.
The lags a, whether having two rows of small holes c or only one row of either
large or small holes as at c¹, fig. 7, may be made in accordance with this invention
with equal advantage.
When lags a having large holes, as shewn by fig. 7, are employed the pegs to be
used in connection therewith are according to this invention, preferably made hollow
or tubular as shewn by fig. 6, d³, and since the parts e of the machine in contact with
which they said pegs d³ have to operate are of considerable weight, to prevent excessive
wear, the hollow part of the peg d if made of metal may be filled with wood of which
projects sufficiently to come in contact with said part e and so avoid the excessive
wear incident to the action of one piece of metal rubbing or operating against another.
The pegs d whether of the shapes shewn by figs. 4 and 5 or of that shewn by
fig. 6, are made slightly taper or in other words rather larger in diameter at the
part than at d gradually tapering from one to the other, so that they may be
very readily inserted in their respective holes c in the lags and yet when pressed
into their proper positions they will tightly fit within said holes e by which means
the insertion of the strip & is greatly facilitated aad efficiency of the pegs enhanced.
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. A lag a having a groove of the shape described formed therein, a detachable
slide formed as set forth, and a peg d having a head formed thereon and the body
part of said peg being somewhat taper, in combination the same being used as and for
the purpose specified.
2. A lag a having a groove formed therein as shewn, a strip of metal & formed as
described, and a hollow or tubular peg d³ with or without the piece of wood f, in
combination, the same being constructed and arranged to perform, the functions
substantially as herein specified.
TAL: ກ. 1
M
T