IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said William Thompson at the
Office of the Commissioners of Patents on the 25th May 1882.
WILLIAM THOMPSON of Blackburn in the County of Lancaster, Manufacturer,
"IMPROVEMENTS IN LOOMS FOR WEAVING "
The improvements relate to what is known as the "taking up" motion in looms
for weaving, and the object thereof is to enable smaller gradations in the numbers
of picks or weft woven in the fabric to be made.
-
The "taking up" motion as constructed at present, usually consists of a toothed
wheel attached to the winding on roller, an intermediate differential-gearing, or as
it is mostly termed, the stud wheel, and a pinion toothed wheel, attached to the
ratchet and pawl motion, which is actuated at every beat of the battern or slay.
To enable a greater or less number of "picks" or weft per given measurement of
cloth to be put into the fabric, the pinion attached to the ratchet and pawl motion
is so arranged as to be capable of change for one of greater or less number of
teeth. But it is obvious that only such changes can be effected as involve a
difference of one complete tooth in the pinion wheel. And as it is now sometimes
required to make an increase or decrease in the amount of weft used of a smaller
extent than is involved in the change of pinion aforesaid it is desirable that
improvements be made to enable this to be done.-To accomplish this and to
effect my improvements I construct the portion of the "taking up" motion which
consists of the geared wheels in such manner that the "stud wheel already.
mentioned shall be caused to be changeable as well as the pinion wheel within the
required limits.-By providing a suitable number of tooth by tooth gradated stud
or intermediate differentially geared tooth wheels for the purpose of change wheels,
a mechanical arrangement is made whereby in combination with the change
pinion wheels aforesaid, very much finer gradations in the number of picks or weft
in a given length of cloth is effected. Various methods of mounting these combined
or compound, change wheels and of adjusting the same into gear may be adopted,
and any suitable combination of numbers of teeth in such may be used.
"

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Thompson in the Great Seal Patent Office on the
25th November 1882.
WILLIAM THOMPSON of Blackburn in the County of Lancaster Manufacturer
"IMPROVEMENTS IN LOOMS FOR WEAVING."
The improvements relate to what is known as the "taking up" motion in looms
for weaving, and the object thereof is to enable smaller gradations in the numbers
of picks or weft woven into the fabric to be made.
The "taking up" motion as constructed at present, usually consists of a toothed
wheel attached to the winding on roller; an intermediate differential gearing, or
as it is mostly termed the "stud" wheel, and a pinion toothed wheel attached to
the ratchet and paul motion, which is actuated at every beat of the battern or
slay. To enable a greater or less number of "picks" or weft per given measure-
ment of cloth to be put into the fabric, the pinion attached to the ratchet and paul
motion is so arranged as to be capable of change for one of greater or less number
of teeth. But it is obvious that only such changes can be effected, as involve a
difference of one complete tooth in the pinnion wheel. And as it is now sometimes
required to make an increase or decrease in the amount of weft used, of a smaller
extent than is involved in the change of pinion aforesaid, it is desirable that
improvements be made to enable this to be done.
$4
To accomplish this and to effect my improvements, I construct the portion of the
taking up" motion which consists of the geared wheels in such manner, that the
"stud" wheel already mentioned shall be caused to be changeable as well as
the pinion wheel within the required limits.
By providing a number of tooth by tooth gradated stud, or intermediate
differentially geared toothed wheels, for the purpose of change wheels, to supplement
the ordinary, a mechanical arrangement is made whereby, in combination with the
change pinion wheels aforesaid, very much finer gradations in the number of
picks" or weft in a given length of cloth may be effected, than if such change is
entirely confined to either the change pinion or stud wheels separately, as com-
binations, of numbers may be obtained in this manner which will enable minute
fractions of a pick to be added to the quarter inch of cloth.
"
Various methods of mounting or fixing these combined or compound change
wheels, and of adjusting the same into gear may be adopted, and any suitable
combination of numbers of teeth in such may be used, which may be found most
convenient for the particular class of loom to which the improvements may be
applied.
Having now described my improvements and means I adopt in carrying the
same into effect, I would have it understood that I do not confine myself to the
precise details described, as variations may be made without departing from the
peculiar character of the invention:―
But what I do claim is —
The employment of a number of tooth by tooth or otherwise gradated stud, or
intermediate differentially geared toothed wheels, for the purpose of using the same
as change wheels, in combination with the ordinary change pinion wheels, in the

page_text: taking up ' " motion of looms for weaving, for the purpose and in manner
substantially as described.
In witness whereof, I the said William Thompson have hereunto set my
hand and seal this Twenty-second day of November in the year of our Lord,.
One thousand, Eight Hundred and Eighty-two.
Witness :-
W. GADD
Consulting Engineer
64 Barton-arcade
Manchester
WILLIAM THOMPSON (L.S.)