An Improved Loom Brake.
Year: 1890

page_text: Date of Application, 31st May, 1890
Complete Specification Left, 28th Feb., 1891-Accepted, 28th Mar.. 1891
PROVISIONAL SPECIFICATION.
An Improved Loom Brake.
I, ELI FIELDEN, of Grosvenor Square, Ashton-on-Mersey, in the County of
Chester, Weaving Master, do hereby declare the nature of this invention to be as
follows:
My said invention relates to an improved construction of automatic brake for
looms. In combination with the ordinary well known weighted lever and brake
pulley I use a brake in the form of a lever one end of which is curved to corre-
spond to the outer edge of the brake pulley and is faced with leather or other
suitable material for increasing friction. The other end of the brake lever works
on a pivot or stud secured at a convenient place to the loom side. A connecting
link connects the brake lever to the weight lever which occupies its usual position
below the brake pulley and the said connecting link is applied to the brake lever in
such a way that it becomes what is known as a lever of the third kind, that is to
say the pull of the weighted lever is applied between the fulcrum of the brake
lever and the part which hears on the rim of the brake pulley. The fulcrum or
stud on which the brake lever works is placed in front of and preferably slightly
higher than the centre of the brake pulley and the acting end of the brake lever is
placed so that it bears on the front part of the rim of the brake pulley in such a
manner as to leave the top part of the brake pulley uncovered so that the weaver
may have access thereto for the purpose of readily turning the loom backwards by
hand. With a brake constructed and applied in the manner hereinbefore described
the brake pulley can be easily turned backwards by hand even when the brake
is subject to the pull of the weight lever. Considerable resistance is however
offered to the forward rotation of the pulley.
The ordinary weight lever actuated from the starting handle in the usual well
known manner may be employed for applying the necessary power to the brake.
The points of attachment of the connecting link on the weight lever and on the
brake lever are made adjustable and means are also provided for readily adjusting
the length of the said connecting link. The brake lever itself is also constructed so
that its length may be readily adjusted preferably by being made in two pieces one
or both of which are provided with slots through which bolts are passed for securing
the two parts together.
Dated this 30th day of May 1890.
JULIUS ALLMANN & Co.,
70, Deansgate, Manchester, Agents for Applicant.
COMPLETE SPECIFICATION.
An Improved Loom Brake.
1, ELI FIELDEN, of Grosvenor Square, Ashton-on-Mersey, in the County of
Chester, Weaving Master, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
My said invention relates to an improved construction of brake for looms so
arranged as to come automatically into operation when the ordinary spring stopping
and starting handle of the loom is moved by the weft motion for the purpose of
stopping the loom by shifting a strap fork.
In a brake constructed in accordance with my said invention I make use of a
weighted lever of the usual type having its fulcrum at a convenient point under
719

page_text: the brake pulley and attached at the front end by a vertical rod to the usual
tumbler or bell crank lever connected with the weft motion. I also make use of
the ordinary brake pulley on which the brake block is made to bear when brought
into operation. The brake lever works on a pivot or stud at a convenient part of
the frame work of the loom and is curved at the acting end to suit the contour of
the brake pulley and may be provided with a lining of leather, wood or other
suitable material for increasing the friction. The brake is arranged to bear on the
front part of the rim of the brake pulley in such a manner as to leave the top part
thereof uncovered. The weaver has thus immediate access to the top of the pulley
for the purpose of turning the loom backwards by hand.
Referring to the accompanying drawings which illustrate my said invention a is
the brake pulley is the weighted lever with a sliding weight thereon having its
fulerum at c and suspended at the other end by a hooked rod d from the tumbler or
bell crank lever operated by the weft motion. f is the brake lever oscillating on a
pivot or stud at a convenient part of the loom and when in action bearing on the
brake pulley at y at the upper front part of the rim of the brake pulley. The
brake lever is constructed in two parts provided with slots and bolts for the
purpose of adjusting its length. From the underside of the brake lever depends
a connecting rod which is adjustable at its lower end in a bracket i secured to the
weight lever for the purpose of regulating the distance of the brake lever / from
the brake pulley a. The bracket i is also adjustable on the weight lever . The
brake lever thus becomes a lever of the third kind. On the hooked rod a falling
owing to the weft motion coming into operation by the breakage of the weft the
weighted lever will fall and cause the free end of the brake lever to bear on the
brake pulley and to bring the loom to a standstill. Instead of the brake lever g
being rigid and pivoted it may be made elastic for example of spring steel and in
that case one end may be fixed instead of being pivoted at f
A brake constructed as herein before described permits the use of a much smaller
weight on the weight lever than is usually the case and the shock produced when
the brake is applied is thereby minimised. When the brake is constructed and
applied in the manner hereinbefore described considerable resistance is offered to the
forward motion of the brake pulley and it is quickly stopped. When the pulley is
turned backwards the effect of the brake is however very slight and after the loom
has stopped the weaver can easily turn it backwards by hand without having to
release the brake.
I make no claim to the use of a brake pulley and brake generally for the purpose
of stopping a loom nor to the adjustable weight lever and hooked rod for operating
the same since such are well known and at present in use for the same purposes
as my said invention but
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
A loom brake consisting of a brake lever used as a lever of the third kind acting
on the upper front part of a brake pulley substantially as and for the purpose
Lereinbefore described and set forth.
Dated this Twenty-seventh day of February 1801
EDWARD TURNER WHITELOW,
70, Deansgate, Manchester, Agent for the Applicant.