AN IMPROVED ARRANGEMENT OF P 35
Year: 1875

page_text: LETTERS PATENT to Johann Julius Schulz, of Coventry, in the County
of Warwick, Engineer, and Thomas Clay, of the same Place,
Manufacturer, for the Invention of "AN IMPROVED ARRANGEMENT OF
P
35
PROVISIONAL SPECIFICATION left by the said Johann Julius Schulz
and Thomas Clay at the Office of the Commissioners of Patents,
with their Petition, on the 25th February 1875.
I, JOHANN JULIUS SCHULZ, of Coventry, in the County of Warwick,
Engineer, and THOMAS CLAY, of the same Place, Manufacturer, do hereby
declare the nature of the said Invention for "AN IMPROVED ÅRRANGEMENT
OF TENSION MECHANISM APPLICABLE TO WARP BEAMS," to be as follows:-
--
The object of this Invention is to obtain an automatic adjustment of
the tension put on warp beams as their diameter decreases. To this end
I connect the friction cord or band which overlies the ordinary friction
pulley on the warp beam to a weighted lever fitted with a traversing
counterweight. This lever may conveniently consist of a screwed

page_text: spindle fitted to and turning freely in a box bearing supported between
pivots carried by a forked bracket piece. On the screw of this spindle
rises the counterweight, and by the rotation of the screw the weight is
traversed along it to increase or diminish the effective drag of the lever
as desired. A slow rotary motion is given to the screwed spindle by
means of gearing set in action by the warp beam as it is caused to give
off its warp. Thus, for example, to the axle of the warp beam I key a
worm which gears into a worm wheel carried by a vertical spindle. At
its lower end this spindle carries a bevil wheel which gears into and
drives a transverse spindle also fitted with a worm, and into the worm
gears a worm wheel keyed to the screwed spindle forming part of the
weighted lever. As therefore the warp is delivered from the beam and
the diameter of the beam consequently decreases, the weight on the lever
will be caused slowly to advance towards the fulcrum of the lever, and
thereby diminish the friction or drag upon the warp beam.
To provide for different rates of adjustment to suit different numbers
of yarn, I change the worm on the warp beam axle, or in place of
screwing the spindle of the lever I may fit it with a coiled spring, which
while serving the purpose of the traversing screw thread, will admit of
being contracted or expanded to change the pitch of the screw, and
thereby alter the rate of progress of the weight towards the fulcrum of
the lever.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Johann Julius Schulz and Thomas Clay in the
Great Seal Patent Office on the 25th August 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHANN
JULIUS SCHULZ, of Coventry, in the County of Warwick, Engineer, and
THOMAS CLAY, of the same Place, Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fifth day of February, in the
year of our Lord One thousand eight hundred and seventy-five, in
the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said Johann Julius Schulz and
Thomas Clay, Her special licence that we, the said Johann Julius Schulz
and Thomas Clay, our executors, administrators, and assigns, or such

page_text: given to the screwed spindle e by means of gearing set in action by the
warp beam a as it is caused to give off its warp. Thus, for example, to
the axle of the warp beam a is keyed a worm g which gears into a worm.
wheel carried by a vertical spindle h'. At its lower end this spindle
carries a bevil wheel * which gears into and drives a similar wheel on
the transverse spindle i, which is also fitted with a worm i¹ which gears
into a pin or crown wheel e² keyed on to the end of the screwed spindle e,
and therefore forms part of the weighted lever. The spindle e turns
freely in the ring of the block d to which the cord c is attached and also
in the box bearing f. As the warp is delivered from the beam a (and
the diameter of the latter consequently decreases), the weight e* on the
levere will (by the rotation of the screwed lever e) be caused slowly to
advance towards the fulcrum of the lever, and thereby diminish the
friction of the cord c on the pulley b, and consequently the drag upon.
the warp beam.
To provide for different rates of adjustment to suit different numbers
of yarn, the worm wheel h may be changed and the worm g on the warp.
beam axle may be changed also. It will not however be necessary to
make this change in the gearing unless the difference in the size of the
yarn is very great, as for slight differences the adjustment of the position
of the weight e* on the lever will be sufficient. In place of screwing
the spindle of the lever e it may be fitted with a coiled spring, which
while serving the purpose of the traversing screw thread will admit of
being contracted or expanded to change the pitch of the screw, and
thereby alter the rate of progress of the weight towards the fulcrum of
the lever as may be required.
Instead of creating tension on the warp by means of the cord c, an
endless chain or band may be employed, as shewn in the diagram, Fig. 3,
in which a is the warp beam or the friction pulley at the end thereof.
The endless friction cord or chain c* passes round this pulley, and also
round a pulley & on the weighted screwed shaft e. The endless cord or
chain c* also passes round a guide or tension pulley k which is drawn
back by means of a strong spring, and keeps the endless chain or cord c*
tight.
Having now described our Invention of "An Improved Arrangement
of Tension Mechanism Applicable to Warp Beams," and having
explained the manner of carrying the same into effect, we claim as the
Invention secured to us by Letters Patent as aforesaid, the adaptation to

page_text: the warp beam of looms for weaving, of a tension cord, band, or chain,
in combination with a weighted lever or arm, on which is mounted a
counterbalance weight which is capable of being automatically moved
towards the fulcrum or point of suspension of the said lever, as and for
the purpose herein set forth.
In witness whereof, I, the said Thomas Clay, have hereunto set my
hand and seal, the Twentieth day of August, in the year of our
Lord One thousand eight hundred and seventy-five.
counterbalance weight which is capable of being automatically moved
towards the fulcrum or point of suspension of the said lever, as and for
the purpose herein set forth.
In witness whereof, I, the said Thomas Clay, have hereunto set my
hand and seal, the Twentieth day of August, in the year of our
Lord One thousand eight hundred and seventy-five.