Im- PROVEMENTS IN LOOMS FOR WEAVING
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by Thomas Tunstill and John
Dodgeon at the Office of the Commissioners of Patents, with their
Petition, on the 19th February 1869.
We, THOMAS TUNSTILL, of Burnley, in the County of Lancaster,
Spinner and Manufacturer, and JOIN DODGEON, of the same Place,
Agent, do hereby declare the nature of the said Invention for "Im-
PROVEMENTS IN LOOMS FOR WEAVING," to be as follows:-
This Invention relates,-
Firstly. To a new combination and arrangement of apparatus or
self-acting means for letting off the warp from the beam regularly,
or so as to maintain uniform tension on the warp at all times from the
commencement of the full beam to its becoming empty, and also in
such manner that sufficient quantity of warp will be let off to prevent
breakage thereof if the shuttle should stop in the shed or not pass
properly into the box when picked. We employ ordinary friction
pullies and chains, belts, or cords to each end of the beam, and also an
ordinary "vibrator" or shaft with a vibratory crank bar, which we
invert, that is, we place the crank underneath or betwixt the shaft
thereof and the warp beam, so that the warp will first pass under the

page_text: crank bar, and thence over the shaft to the healds. The friction chains
or cords are each attached to separate levers, each lever being hinged
at one end to one of the loom ends respectively; the other ends of the
said levers projecting towards each other are connected either by a
T-formed lever bar, or by chain, belt, or cord and pulley attached equi-
distant from the fulcrums of the levers to a weighted lever hinged
at one end to the cross rail of the loom, the other or weighted end of
this lever being connected by a chain, belt, or cord to a pulley or lever
fixed on the vibrator shaft, so that the pull or stretch of the warp will
always lift the weighted lever and release or remove the pressure from
the warp beam, and thereby let off the proper quantity of warp
required.
Secondly. This Invention relates to means of taking up the cloth
or winding it on the cloth beam or roller, whereby weighted levers
are dispensed with for producing the required friction or adhesion of
the cloth thereto, and in some cases also dispensing with sand, emery,
or other means of producing a rough surface on the taking-up
roller.
By one arrangement we place the cloth beam under the taking-up roller
as usual, but in fixed bearings, and we conduct the cloth from the
breast beam under the cloth beam, thence over the taking-up roller,
thence to and around the cloth beam betwixt the first layer or fold
thereon, and an ordinary fixed rod may or may not be used in addition
thereto.
By another arrangement we place the cloth beam in slides above
the taking-up roller, and also place another roller betwixt them in the
said slides; we then conduct the cloth from the breast beam under the
taking-up roller, then partly around the intermediate roller, thence
around the cloth beam; or we may conduct it again under the taking-up
roller, and thence, as before, partly around the intermediate roller,
thence to and around the cloth beam..
By these arrangements the cloth itself becomes a pressure to produce
friction or adhesion thereof for the taking up.