A NEW OR IMPROVED BRAKE MECHANISM FOR THE WARP BEAMS OF LOOMS
Year: 1883

page_text: LETTERS PATENT to Jasper Wetter, of. Wimbledon Surrey, for an Invention
of A NEW OR
IMPROVED BRAKE MECHANISM FOR THE WARP BEAMS OF
LOOMS communicated to him from abroad by Carl Syländer jun: of Bolkenhayn,
Gerinany
:
PROVISIONAL SPECIFICATION left by the said Jasper Wetter at the Office
of the Commissioners of Patents on the 24th July 1883.
JASPER WETTER, of Wimbledon, Surrey,
"A NEW OR IMPROVED
MECHANISM FOR THE WARP-BEAMS OF LOOMS a communication to me from abroad
by Carl Syländer jun: of Bolkenhayn, Germany
"
BRAKE
This invention has for its object the uniformn winding off of the warp threads from
the warp-beam in proportion as the manufacture of the fabric proceeds, and to give
to the warp threads the necessary tension.
For this purpose I mount on the shaft of the warp-beam a spurwheel gearing
into a pinion mounted on a shaft on which is fixed a ratchet-wheel.
Outside this ratchet wheel is pivoted an anchor connected by a thin rod with
one end of a double-armed lever carrying at its other arm a weight.
The said lever is mounted on a horizontal shaft placed above the warp-beam
and having secured to it an excentrically curved board or cam over which pass
the warp-threads coming from the warp-b
-beam.
If the tension of the thread increases, the board or cam over which the warp
passes, is drawn downward, in opposition to the counterweight, and thereby the
tooth of the anchor which had prevented the turning of the ratchet wheel, lifted
out, so as to allow the latter to turn until it is again arrested by the anchor..>
This mechanism effects an intermittent winding off of the warp-threads and a
uniform tension of the thread:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Jasper Wetter in the Patent Office on the 24th January 1884.
JASPER WETTER, of Wimbledon, Surrey, "A NEW OR IMPROVED BRAKE
MECHANISM FOR THE WARP BEAMS OF LOOмS," a communication to me from abroad
by Carl Syländer jun:, of Bolkenhayn, Germany,
This invention relates to brake mechanism applicable to the warp beams of
power looms, and has for its object the uniform unwinding of the warp threads
from the warp beam in proportion as the manufacture of the fabric proceeds, and
to give to the warp threads the necessary tension.
In describing this invention reference will be made to the accompanying
drawing, of which Fig 1 is a side elevation and Fig: 2 a front elevation of an
appliance embodying this invention.
The brake chiefly comprises a ratchet mechanism which turns the warp beam
by means of tooth gearing.
On one end of the warp beam A is mounted a tooth wheel a gearing into a
smaller tootwheel b mounted on the same shaft as the ratchet wheel c. This
shaft is mounted in suitable bearings on the frame B of the loom.
The yarn leaving the warp beam A passes over a plate or cam & having a cross
section as represented in Fig. 1 in dotted lines.
The cam d is provided with journals adapted to turn in the frame B, and on
one of these journals is mounted the horizontal double armed lever f having at
one end the weight G, while the other end is connected by means of rod g with
the pawih pivoted at o.
The yarn wound off the warp beam passes over the cam d and is wound on the
cloth beam of the loom after it has been crossed by the pick.
The cam d is maintained in the position, shown in the drawing, by means of the
weight G and lever f, and as the warp beam A is prevented from turning, by
means of the pawl h, the warp thread receives a certain amount of tension.
If now in course of the operation the tension of the warp threads increases
.beyond a certain limit, the cam d follows the pull exerted on its upper edge, and
swings slightly towards the left (see Fig 1), in consequence of which the rod g is
depressed by the lever f, whereby the tooth h¹ of the pawl h is disengaged and the
ratchet wheel together with the warp beam A is permitted to turn until the pawl h
again gears into the wheel c, whereupon the cam d, lever f and pawl h are brought
back into their previous position.
In this manner an intermittent but exceedingly uniform unwinding of the warp
threads is obtained, as well as an equally uniform. tension of the threads, so that
the breaking of the latter through excessive tension is avoided. The backward
motion of the cam d is limited by the adjustable screw i which comes in contact
with the lever f.
Having now described the invention and in what manner the same may be
performed I wish it to be understood, that what I claim is:
A brake for the warp beams of power looms, comprising in its construction a
ratchet wheel c geared together with the warp beam A, a cam or plate d and a
pawl connected with the said cam or plate d by a rod g and lever f, the said

page_text: cam being adapted to transmit its swinging motion to the pawl h through the
lever and rod g, for the purpose of obtaining an intermittent but uniform
unwinding of the warp threads from the warp beam.
In witness whereof I, the said Jasper Wetter have hereunto set my hand and
seal this 24th day of January AD 1884.
T
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