Improvements in Brakes Applicable for Looms and other Machines.
Year: 1889

page_text: Date of Application, 3rd May, 1889
Complete Specification Left, 29th Jan., 1890-Accepted, 1st Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Brakes Applicable for Looms and other
Machines.
I, WILLIAM HARTLEY, of Pendle Mill, Nelson, in the County of Lancaster,
Manufacturer, do hereby declare the nature this invention to be as follows
This invention relates to brakes for stopping or retarding the movement of the
rotating parts of mechanism, and is primarily designed to be applied to looms to stop
the loom when the weft thread breaks.
The power of an ordinary brake block of segmental form, is applied by means
of a lever pressing it directly against a wheel or its equivalent. The object of
my improvements is to arrange the brake so that when released or brought into
action, the movement of that part of the mechanism against which it acts will
assist in quickly applying it against the brake wheel or its equivalent.
It consists essentially of a flexible band or strap secured at one or both ends to a
stationary stud or pivot, working in conjunction with a pivoted lever, by which it is
pressed against the periphery of a wheel or other rotating surface.
As applied to a loom a flexible strap of steel or iron faced with leather or other
suitable material, is secured at one end to a stationary bolt or stud, in front of the
fly wheel, while the other end rests on a block, on the end of a pivoted lever in
the position of the ordinary brake lever, and is operated in a similar manner from the
weft fork motion, when the weft end brakes. When the brake is applied, the block
at the end of the lever forces the end of the strap against the wheel, the friction
between it and the wheel at once draws it tightly against the wheel, thus utilizing
the momentum of the machine as the power to effect the braking, the only
power required on the lever being what is sufficient to hold the brake strap against
the wheel.
This brake may be applied to other classes of mechanism moving in one direction,
or alternately in either direction. In the latter case, the flexible strap should be
made long enough to encompass about half the circumference of the wheel with
which it is to engage, and be secured at both ends, the lever block engaging with it
about midway between the two ends. It may be applied either above or below the
brake wheel according to the construction of the apparatus to which it is applied.
The block on the lever which presses the band or strap against the wheel, may
be of any suitable construction, such as a curved surface, or a roller to allow the
band as it tightens against the wheel to pass between it and the block with as little
friction as practicable, and may be provided with a projection, stud, or other device
to prevent the end slipping over the block and falling away from its work.
I am aware that strap or band brakes, one or both ends of which are secured to a
pivoted lever, have been used, also that brake blocks have been applied by means of
a strap or band attached to a pivoted lever, and such form no part of my invention.
Dated this 2nd day of May 1889.

page_text: Improvements in Brakes Applicable for Looms and other
*Machines.
I, WILLIAM HARTLEY of Pendle Mill, Nelson, in the County of Lancaster, Manu-
facturer, 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
-
This inventior relates to brakes for stopping or retarding the movement of the
rotating parts of mechanism, and is primarily designed to be applied to looms to
stop the loom when the weft thread breaks or is absent
In brakes hitherto in use a brake block of segmental form carried at the end of
a lever has been applied by being pressed directly against or into contact with the
periphery of a wheel or its equivalent, or a curved lined metal brake strap or bar
made fast at one end to a stationary point and secured at the other by a link or
otherwise to a pivoted lever, has been applied by the lever being moved eccentrically
to the periphery of the brake wheel and the strap being thereby drawn tightly
against it.
The object of my invention is to dispense with the use of any link and provide
a brake without any joint connection between the actuating lever and the brake
strap and so arranged that when applied or brought into action the motion of
the wheel will assist in quickly applying it or drawing it against the periphery.
It consists essentially of a flexible band or strap secured at one or both ends to a
stationary stud or pivot in combination with a pivoted lever, by which it is pressed
against the periphery of a wheel or other rotating or moving surface
Referring to the drawings as an example the invention is shown as applied to the
brake wheel of a loom, sufficient parts of the loom to illustrate the invention, only
being shown.
A flexible strap or band A of steel or iron is secured by one end to a stationary stud
or pivot B, attached to the frame. The strap A, of steel or iron, is preferably faced
with leather or other similar material though if desired may be used without any such
material The stud or pivot B, is placed at either side of the brake wheel C according
to the direction of its rotation. A pivoted lever D, extends below the brake wheel C
and the lower end of the strap or band A rests upon it The lever D is of the form
of the ordinary brake lever which carries a brake shoe; and is pivoted at d, in the
position in which the ordinary brake lever is placed, and is operated in a similar
manner from the weft fork motion, when the weft end breaks or is absent A block E
is affixed to the end of the lever D, upon which the loose end of the brake strap A,
rests. The block E is not essential or it may be replaced by a small roller or other
similar device, mounted in the end of the lever
When the brake is applied, the block E at the end of the pivoted lever D forces the
loose end of the strap A against the wheel C, the friction between it and the wheel at
once draws it tightly against the periphery, thus utilizing the momentum of the
machine as the power to effect the braking, the only power required on the lever
being what is sufficient to hold the brake strap against the' wheel.
This brake may be applied to other classes of mechanism moving in one direction,
or alternately in either direction. In the latter case, the flexible strap should be made
long enough to encompass about half the circumference of the wheel with which it is
to engage, and be secured preferably on pivots at both ends, the lever block engaging
with it about midway between the two ends. It may be applied either above or below
the brake wheel according to the construction of the apparatus to which it is applied.
The block E on the lever which presses the band or strap against the wheel, may be
any suitable construction, such as a curved surface, or a roller to allow the band as
it tightens against the wheel to pass between it and the block with as little friction as
practicable, and if desired may be provided with a projection, stud, or other device to
prevent the end slipping over the block and falling away from its work.
of

page_text: I am aware that strap or band brakes, one or both ends of which are secured to a
pivoted lever, have been used, also that brake blocks have been applied by means of a
strap or band attached to a pivoted lever, and such form no part of my invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
•
A brake applicable to looms or other machines having a flexible band or strap A
secured at one or both ends to a stationary stud or pivot in combination with a
separate and independent pivoted lever (D) by which it is pressed against the
periphery of a wheel or other surface substantially as described and shown.
DL 1
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.