Year: 1886

page_text: I JOHN HENRY JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention which has been com-
municated to me from abroad by La Société Smith frères & Cie of Calais in the
Republic of France Button Manufacturers and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This Invention relates to the manufacture of an improved lace fabric and
consists in making the ground of the fabric by a peculiar system of interlocking
and superposing the warp and weft threads without the warp threads being
twisted with the weft or bobbin threads as hereinafter described whereby novel
effects are enabled to be obtained and greater strength is imparted to the fabric than
is possible with the ordinary methods of forming the ground of lace fabrics.
And in order that the said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed Sheet of drawings.
Figures 1. 2 and 3 of the accompanying drawing illustrate three different forms
of ground made according to this invention In these figures the dotted lines
represent the bobbin or weft threads and the full lines represent the warp threads.
This improved ground is made on ordinary bobbin net machines by passing the
warp threads through holes in the perforated metal bars operated by the jacquard
mechanism as usual but in such a manner that the warp threads are always shifted
to the extent of two bobbins at once and are tied by the threads from four bobbins
the warp threads being simply superposed and not twisted-Not less than four of
the perforated bars are employed in the manufacture of this improved fabric but
any desired number above four may be used-When four bars are employed the
warp threads are passed through the perforations in the bars at every two gates or
when eight bars are employed at every four gates and so on-The front or upper
bars according to this invention are caused by the jacquard mechanism always to
shog or shift end wise to the extent of two gates on the front motion, except when
'

page_text: changing the effect in the ground when they shog once to the extent of one gate or
three gates as required-The lower or back bars on the contrary are always
displaced or traversed to the extent of two gates on the back motion with the same
exception that between the different effects they change to one or three gates as in
the case of the front or upper bars.
The new ground produced according to this Invention possesses a strength
equal to that of ordinary woven fabrics which enables it to be advantageously
employed in the place of fancy German fabrics at the same time retaining a lace
like character.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
I claim is
First The manufacture of a lace fabric consisting in forming the ground by
shifting or traversing the warp threads without twisting the same with the weft or
bobbin threads and in such a manner as to effect the interlocking and superposing
or crossing of the threads substantially as hereinbefore described and illustrated in
the accompanying drawings.
Second As a new product of manufacture a lace fabric having a ground formed
by combining the warp and weft threads in the manner herein before described.
Dated this 23rd day of July 1886.