IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1880

page_text: LETTERS PATENT to George Frederick Dawson, Worsted Spinner, John Myers,
Managing Overlooker, and John Smith, Mechanic, all of Bradford, in the
County of York, for an Invention of "IMPROVEMENTS IN LOOMS FOR
WEAVING."
PROVISIONAL SPECIFICATION left by the said George Frederick Dawson,
John Myers, and John Smith at the Office of the Commissioners of Patents on
the 15th March 1880.
GEORGE FREDERICK DAWSON, Worsted Spinner, JOHN MYERS, Managing
Overlooker, and JOHN SMITH, Mechanic, all of Bradford, in the County of York.
"IMPROVEMENTS IN LOOMS FOR WEAVING."
The object of this Invention is to arrange the break apparatus connected with
the warp beams in looms for weaving in such a manner that when the healds are
opening the shed in the warp for the shuttle to pass through the pressure on the
break is relieved, which eases the tension on the warp threads, and prevents
damage to the warp in case the shuttle by any means stops in the shed; also, to
brake the warp beam at each pick of the loom, and hold the warp tight in time for
the going part to beat up the weft just delivered from the shuttle.
We accomplish our object in the following manner :-On to the ordinary collar
at one or both ends of the warp beam we attach a brake clip having two long taper
projections, which are in contact with two small adjustable pullies that are fitted
to a lever, one end of which is secured to the framework of the loom, and the other
end extends to the going part, and is in such a position that when the going part
is about to beat up the weft the lever end is actuated, and the adjustable pullies
before mentioned pass down the taper projections, and.nip-the-brake clip tight on
to the warp beam collar, and thus brakes the beam and locks the warp fast until
the return of the going part when the clip is relieved, and the tension of the warp
eased to such a degree that the healds can open the shed without materially
stretching or damaging the warp threads.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Frederick Dawson, John Myers, and John Smith in the Great
Seal Patent Office on the 13th September 1880.
GEORGE FREDERICK DAWSON, Worsted Spinner, JOHN MYERS, Managing
Overlooker, and JOHN SMITH, Mechanic, all of Bradford, in the County of York. 5
IMPROVEMENTS IN LOOMS FOR WEAVING."
58
The object of this Invention is to arrange the brake apparatus connected with
warp beams in looms for weaving in such a manner that when the healds are
opening the "shed" in the warp for the shuttle to pass through the pressure on
the brake is relieved, and the tension on the warp threads reduced to such a degree 1
that there is no material stretching of the warp threads, and in case the shuttle
should by any means stop in the shed the breakage of warp threads is greatly
reduced; also, to so arrange the brake apparatus that the warp beam is held firm
and rigid at cach and every pick of the loom at such time when what is
technically termed the "going part" is beating up the weft just delivered from the 1
shuttle.
Such being the objects of this our Invention we will describe the particulars thereof
aided by the accompanying Drawings, in which Figure 1 represents a transverse
sectional elevation of a loom, shewing such portions of the loom as are required to
make clear our Invention; Figure 2 is a plan of one end of a loom fitted with our 2
improved brake apparatus; Figure 3 is an enlarged view of the brake clips and end
of brake lever; and Figure 4 is a plan of the same.
Similar letters are used in the several Figures in indicating identical parts.
We will describe our apparatus as applied to one end of the warp beam; at the
same time we wish it to be understood that we apply the apparatus at both ends of 2
the warp beam in wide looms or when weaving heavy goods.
The warp beam A is mounted in the usual manner, and around the ordinary
metal collar near the end of beam A we place brake clasps B, which fit the circum-
ference of the said collar. These clips B are jointed at C, and have long taper
projecting pieces at D, which pass through a hole formed near end of lever G. In
this hole are also mounted two small pullies H, the circumferences of which are in
contact with the projecting pieces D. One end of the lever G is carried by pin J
as fulcrum, and the lever is of such a length that the other end is underneath what
is technically termed the going part K. At the underside of the going part K we
secure a small pulley L, which at each beat up of the weft comes in contact with a
end of lever G, and forces the lever down in the direction of arrow; the small
pullies H pass down the taper projections D, and nip the same together, the brake
clips B holding the warp beam A tight during the beat up and until the return of
the going part, when the lever will rise and reduce the pressure of the brake clips B
on collar at end of warp beam A, reducing the tension of the warp to such a degree
that the healds can open the shed without materially stretching or damaging the
warp threads.
The light spiral spring M is applied to lever G in order to prevent the lever
jumping on the return stroke of the going part.
What we claim as our Invention is,-
The alternate braking and relief of warp beams in looms for weaving accomplished
by means of brake clips applied at one or both ends of the loom, such clips having
long taper projections D, which are nipped towards each other by means of pulley L
acting upon and pressing down end of lever G, thus tightening the clips C and

page_text: holding firm and rigid the warp beam at each and every pick of the shuttle; and
on the return stroke of pulley L relieving the pressure on lever G, which relief eases
the pressure of the clips on the warp beam.
In witness whereof, I, the said George Frederick Dawson, for and on behalf
of myself and the said John Myers and John Smith, have hereunto set my
hand and seal, this Tenth day of September, in the year of our Lord
One thousand eight hundred and eighty.
GEO. F. DAWSON. (LS.)