Year: 1887

page_text: Date of Application, 21st Nov., 1887
Complete Left, 13th Dec:, 1887
Complete Accepted, 13th Jan., 1888
I, ALFRED AMBLER, of the firm of Abraham Ambler and Sons, of Prospect Mills,
Wilsden, Yorkshire, Spinners and Manufacturers, do hereby declare the nature of this
invention to be as follows:-
--
This invention has reference to trap twisting frames employed in twisting together
two or more threads. In the ordinary trap twisting frames a vertical roller provided
with a pulley is caused to revolve by a band driven from a tin cylinder. In practice
it is found that through the variations of temperature or humidity in the atmosphere,
such cords vary in length; and when such bands expand or stretch through such
variations in the atmosphere, the speed of the vertical roller is lessened, causing thereby
the production of "hard twist."
To prevent the unequal rotation of the vertical roller above mentioned is the object
of my invention, and this I accomplish by the use of automatic apparatus comprising
a suitably shaped pulley connected to one end of a lever working upon a rod under-
neath the driving bands, the other end of such lever being suitably weighted. This
pulley is placed into contact with the driving band and through the medium of the
weight the said pulley is kept in contact with the said driving band; consequently, if
the band either expands or contracts the weighted lever will so act upon it as to keep
the band at one uniform tension.
By this means a simple automatic apparatus is constructed, which can be readily
applied to existing frames, and which keeps the driving bands at an equal tension,
thereby preventing the unequal rotation of the trap twisting roller.
1
1011
1
L
mbo 1007
TASKER & CROSSLEY,
Halifax, Agents.

page_text: 1
I, ALFRED AMBLER, of the firm of Abram Ambler and Sons, of Prospect Mills,
Wilsden, Yorkshire, Spinners, 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 invention has reference to trap twisting frames employed in twisting together,
two or more threads. In the ordinary trap twisting frame, a vertical roller provided
with a pulley is caused to revolve by a band driven from a tin cylinder. In practice
it is found that through the variations of temperature or humidity in the atmosphere,
such cords vary in length, and when such bands expand or strotch through such varia-
tions in the atmosphere or other causes, the speed of the vertical roller is lessened,
causing thereby the production of "hard twist."
To prevent the unequal rotation of the vertical roller above mentioned is the object
of my invention and this I accomplish by the use of automatic apparatus comprising a
suitably shaped pulley connected to one end of a lever working upon a rod underneath
the driving band, the other end of such lever being suitably weighted. This pulley is
placed into contact with the driving band, and through the medium of the weight the
said pulley is kept in contact with the said driving band; consequently, if the band
either expands or contracts, the weighted pulley will so act upon it as to keep the said
band at one uniform tension.
In order that my invention may be better understood, I herein give reference to the
accompanying sheet of Drawings illustrative thereof, wherein A is the ordinary tin
cylinder and B the trap twisting roller secured to vertical shaft C carrying a wharle D,
which wharle is driven by driving band E from the tin cylinder A, all arranged in the
usual manner.
To put my invention into practice I employ a horizontal rod F placed lengthwise of
the frame, and onto such rod I place a number of levers G, one lever to each driving
band. One end of this lever carries a wharle H, into the groove of which wharle the
driving band enters, whilst the opposite end of the said lever G carries a weight I,
which is sufficiently heavy to keep the wharle H always in contact with the driving band.
If, therefore, the driving band stretches through the variations of temperature or other
causes, the weight 1 will keep and force the wharle into contact with the driving band
so as to keep the tension of the driving band equal, and if the said driving band should
contract, the wharle H will descend in proportion as the band is tightened, whereby
the driving band will remain at one uniform tension notwithstanding any variation
in length of the said band.
By the employment of the apparatus herein set forth and shewn in the Drawings, a
simple automatic apparatus is constructed, which can be readily applied either to new
or existing frames.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
In trap twisting frames, the employment of a weighted lever carrying a wharle
placed in contact with the driving band for the purpose of equalizing the
tension thereof in manner substantially as herein described and shewn in the
Drawings.
Dated this 10th day of Dasamba 1007
TASKER & CROSSLEY,
Halifax, Agents.