IMPROVEMENTS IN THE "LETTING OFF APPARATUS OF LOOMS FOR WEAVING
Year: 1884

page_text: I HENRY LOMAX of 60 Railway Road, Darwen, in the County of Lancaster
Mechanical Engineer do hereby declare the nature of my said invention for
"IMPROVEMENTS IN THE "LETTING OFF APPARATUS OF LOOMS FOR WEAVING"
to be as follows:-
"
This invention relates to improvements on the invention described in provisional
specification N° 8012 dated 21st May 1884 and comprises improved construction
and arrangement of apparatus to which the weighting chain or rope is attached and
by which such chain or rope is caused to control the action of the beam in giving
off the warp.
I employ an upright arm hinged or pivotted at its foot and to which by means
of an adjustable clip the end of a single, or ends of a doubled weighting chain or
rope is or are fastened.
The upper portion of the arm referred to is continued or extends to the back of
the neck of the beam and such arm is curved, or provided with a projecting or
eccentric part-as to bear upon, and against the weighting chain or rope, and by
forcing the latter, out of its normal line, increases the strain on the part of the
chain or rope, nearest the neck or ruffle of the beam, and the latter is thus caused,
to move, and give off the required quantity of yarn.
Or in some cases the said arm, in lieu of being hinged or pivotted at its foot, is
provided with eyes at its upper end, through which the weighting rope or chain
is passed, and by which it is clamped or gripped, the lower end of the said arm, is
attached to the weighting chain or rope, passing over the "brake hook," a stop
piece being provided, which determines the amount of motion of the said arm, the
yarn being "let off," when the arm comes in contact with the said stop piece, or in
lieu of the arm referred to, being attached at its upper end, to the weight rope, it
may have an independent fulcrum, there being on the bracket of the fulcrum, an
adjusting set screw, which acts as a stop piece, the end of the rope being passed
over the brake book, its loose end carrying the weight, and the other or opposite
end of the rope, being held by an adjustable slide clip.
The principle of action of the mechanism above described, is, that instead of
throwing weight vertically upon the axis of the beam, the neck or ruffle of the
beam is gripped, and so held, that, until through the action of the healds, or pull on
the yarn, the "upright arm" is moved, and on contact with its stop piece, the grip
on the ruffle is released momentarily, and the yarn is let off.
WALTER BRIERLEY,
Crossley Street, Halifax,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION,
I HENRY LOMAX, of 60 Railway Road, Darwen, in the County of Lancaster,
Mechanical Engineer, do hereby declare the nature of my said invention for
"IMPROVEMENTS IN THE "LETTING OFF" APPARATUS OF LOOMS FOR WEAVING"
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 improvements on the invention described in the
specification N° 8012 dated 21st May 1884, and comprises improved construction
and arrangement of apparatus to which the weighting chain and rope are attached
and by which such chain and rope are caused to control the action of the beam in
giving off the warp.
Such being the nature and object of my said invention, the following is a com-
plete description of same, reference being had to the accompanying drawing
forming a part of this specification in which:-
Fig. 1 is an end elevation of part of framing, warp beam and improved weighting
motion,
. Fig. 2 is a detail.
According to this my invention I employ an arm 1 hinged or pivotted as shewn
at 2 and adjustable by means of the slotted carrier 3 and bolt 4-the upper part of
the arm 1 is continued and extends by the adjustable part 5 to the back of the
neck of the beam and such arm is also provided with projecting part 6, so as to
bear upon and against the weighting rope 7 and by forcing the said rope out of its
normal line increases the strain of the part of the latter nearest the neck or ruffle 8
of the beam the amount of motion will be determined by contact of the curved
part or finger 5 of the upright 1 coming in contact with the rope 7-The weight Sa
and weighting lever 9 are carried by the chain 10 passed over the pulley 11 such
pulley being carried and adjustable in the slot 12 of the clip or brake piece 13 through
the eye 14 of which the rope 7 is passed, the part 13 is separate and forms no
part of the present invention being protected by prior patent granted to me
15th January 1884, N° 1461-the other end of the chain 10 being attached to the
upright 1 so that the weight, weighting chain, beam rope, upright, and projecting
part 6 all act in unison and are governed as to the amount of motion and grip by
the finger 5.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is
1. The upright 1 adjustable vertically, and having projecting part 6, and adjust-
able finger 5, combined, and for purpose herein set forth.

page_text: 2. The upright 1, adjustable, the projecting part 6, the finger 5, rope 7, chain 10
―and brake piece 13, all in combination and as described and illustrated by
drawings annexed.