IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1878

page_text: LETTERS PATENT to John Atkin Porter and Richard Thompson, both of
Blackburn, in the County of Lancaster, Cotton Manufacturers, for the Inven-
tion of "IMPROVEMENTS IN LOOMS FOR WEAVING."
PROVISIONAL SPECIFICATION left by the said John Atkin Porter and
Richard Thompson at the Office of the Commissioners of Patents on the 7th
March 1878.
JOHN ATKIN PORTER and RICHARD THOMPSON, both of Blackburn, in the County
of Lancaster, Cotton Manufacturers. "IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention relates to improved apparatus for denoting when sufficient length
of "cloth" has been woven for each "cut," and thereon self-actingly stopping the
loom preparatory to the weaving in of the "headings."
According to this our Invention we employ a worm on the emery roller. The
worm drives a pinion, on the shaft or spindle of which is a small drum or
winding wheel. A cord attached to the latter and to a slide piece draws the
slide (as the drum revolves) forward until reaching an opening in its (the slide's)
guide. A spring is free to expand, and lifts a spindle connected with a cross shaft.
To other end of the latter is attached a finger, and this latter is thereon depressed
so as to engage with the notch of the "hammer head" and stop the loom. Within
the slide guide is an adjusting screw, by means of which the length of traverse of
the slide, and so the distance or length of cloth between the "headings," is
determined.
To re-start the loom, the attendant has simply to push the slide piece back to
the starting end of the slide, and the attendant cannot overlook this duty, because
the loom will "knock off" as often as started, until the slide piece is returned to
the proper position.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Atkin Porter and Richard Thompson in the Great Seal
Patent Office on the 6th September 1878.
JOIN AITKIN PORTER and RICHARD THOMPSON, both of Blackburn, in the County
of Lancaster, Cotton Manufacturers. "IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention relates to improved apparatus for denoting when sufficient length
of "cloth" has been woven for each "cut," and thereon self-actingly stopping the
loom preparatory to the weaving in of the headings.
According to this our Invention we employ a worn on the emery roller. The
said worm drives a pinion, on the shaft or spindle of which is a small drum or
tension winding wheel. A cord attached to the latter and to a slide piece in a slide
draws the slide piece (as the drum revolves) forward until reaching an opening in
the slide. A spring is free to expand and lifts a spindle connected with a cross
shaft. To the other end of the latter is attached a finger, and this finger is
thereon depressed so as to engage with the notch of the "hammer head," and stop
the loom. Within the slide guide is an adjusting screw by means of which the
length of traverse of the slide and the distance or length of cloth between the
"headings" is determined.
To re-start the loom, the attendant has simply to push the slide piece back to
the starting end of the slide, and the attendant cannot overlook this duty, because
the loom will "knock off" as often as started, until the slide piece is returned to
the proper position.
Above the tension roller is a bracket and thumbscrew, which, when the length
of scarf or heading is fixed by the adjusting screw and slide piece, a thumbscrew
is screwed against the tension roller, preventing alteration of length of heading.
Such being the nature and object of this our said Invention, in order that the
same may be fully understood we have hereunto annexed two Sheets of Drawings
illustrative thereof, and marked the same with figures and letters of reference.

page_text: The lower end of the rod K forms a catch, and on the other end a fulcrum or
heavy ended lever M rests, the other end of the lever M being immediately over
the weft fork hammer N. The tension wheel E has a projecting on one side its
periphery, which, as the wheel revolves, comes in contact with and pushes off
the catch end of the rod K, which is lifted by spring and acts upon the fulcrum
lever M, bringing it into contact with the weft fork hammer N. An upright
finger G and adjusting screw P determine length of scarf or heading; the figures
indicating such length are on front of tension wheel E.
Having thus fully described the nature and particulars of this our said Invention,
we would have it understood that what we claim as our Invention is,-
Firstly. The combination of the slide G, slide piece G¹, and spring J, for purpose
described and as illustrated.
Secondly. The combination of the adjusting screw and slide G or finger G as
and for the purpose described.
Thirdly. The combination of the tensional winding wheel E, pin J, spring J,
for operating K, as and for the purpose described and illustrated.
In witness whereof, we, the said John Atkin Porter and Richard Thompson,
have hereunto set our hands and seals, this Twenty-eight day of August,
in the year of our Lord One thousand eight hundred and seventy-eight.