IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1871

page_text: LETTERS PATENT to William Pearson, of the Firm of Pearson and
Spurr, of Birstal, in the County of York, Engineers, Millwrights,
and Machine Makers, and Hervey Bradbury, of the same Place,
Loom Tuner, for the Invention of "IMPROVEMENTS IN LOOMS FOR
WEAVING."
Sealed the 29th September 1871, and dated the 3rd April 1871.
PROVISIONAL SPECIFICATION left by the said William Pearson and
Hervey Bradbury at the Office of the Commissioners of Patents,
with their Petition, on the 3rd April 1871.
We, WILLIAM PEARSON, of the Firm of Pearson and Spurr, of Birstal,
in the County of York, Engineers, Millwrights, and Machine Makers,
and HERVEY BRADBURY, of the same Place, Loom Tuner, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN Looms
FOR WEAVING," to be as follows :→
This Invention relates to prior improvements in looms for which
Letters Patent were granted to the said William Pearson, Hervey
Bradbury, and William Spurr, dated August 6th, 1868, in the Specifi-
cation of which certain mechanism or apparatus is shewn and described
for working "rising boxes" or change shuttle boxes, and the present

page_text: distances apart, in that arm of the weighted lever to which the boxes
are connected, are fixed two or more studs, and the hooked rod is
actuated by the jacquard or peg lag apparatus so as to cause one or
other of the hooks to catch or to take hold of one or other of the studs,
according as to whether the boxes are to be lifted one, two, or more i
distances, that is, whether from one to the next box, or to the third box,
and so on.
A catch lover is also provided which is actuated by the
hooked rod, so as to catch and hold the boxes in position after being
raised by the action of the cam, and this catch is also arranged so that
the attendant may place the boxes in any desirable position when 1
required.
In order that this Invention may be fully understood we herein give
reference to an accompanying Sheet of Drawings where similar letters
refer to the same parts in each Figure.
Fig. 1 is an end elevation or so much thereof as is necessary to shew 1
the application of our improvements thereto; Fig. 2 is a portion of the
back elevation; and Fig. 3 is a detail.
5.
A is the ordinary jacquard or peg lag apparatus for indicating the
time for change and putting the working parts into action; B is the
cam fixed on the crank shaft; the cam operates the box lever O, to 2
which is attached a rod D having a hook or notch formed so as to catch
on a stud E, which is fixed in the lever F, ono end of which is attached
by rods & to the shuttle boxes, and on the other end of the said lever
is a balance weight H, as usual. I is a spring catch lever for catching
on the stud J fixed in the said lever F to hold it in position when the 2
boxes are lifted. These levers F and I are shewn at Fig. 3, where
also the rod D is shewn with two hooks D' and D³, so as to act upon
one or other of two studs E¹ and E' when required. At B is shewn.
form of cam for working lever and hooked rod D.
The action of the apparatus is as follows:-A bell-crank lever K is 3
mounted on a stud L fixed on the top of the frame, one arm clipping on
the top of the rod D and the other being hinged to a rod M which is
connected to a lever N of the jacquard apparatus. When a peg in the
chain of lags P comes into contact with the top end of the lever N
it is operated thereby, and pushes (by means of the rod M and lever K) 3
the rod D with its notch under the stud E, as shown at Fig. 1, when by
the action of the cam B the lever F, and consequently the shuttle boxes,
are lifted ono box, and then the spring catch lever takes on the stud J,

page_text: and holds them in that position until the next change is required to
be made.
In looms with three boxes we have a rod and lever, as shewn at
Fig. 3, applied, and when the boxes are required to be lifted from
bottom to top, or two box distances at one lift, we have a longer peg in
the proper lag of the chain to act on the lever N which will place the
hook or notch D³ on the stud E³, and thereby effect the desired object;
but if only one box distance is to be lifted the same short peg will
suffice to place the hook or notch D' in position to catch on the stud E¹
which produce the required effect.
Having thus fully described and ascertained the nature and object of
this our Invention, together with the manner in which the same is to be
or may be performed or carried into practical effect, we would have it
understood that we claim as our Invention the construction, com-
bination, and arrangement of mechanism as and for the purpose herein
fully described and shewn in the Drawings.
In witness whereof, we, the said William Pearson and Hervey
Bradbury, have hereunto set our hands and seals, this Thirtieth
day of September, in the year of our Lord One thousand eight
hundred and seventy-one.
5
W. PEARSON.
HERVEY BRADBURY.
Witness,
WALTER BRIERLEY,
Tasker & Brierley,
Patent Agents,
Halifax & Bradford.
(L.B.)
(L.S.)