IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1875

page_text: LETTERS PATENT to James Denby Lee and James Crabtree, of
Shipley, near Leeds, in the County of York, Machine Makers and
Ironfounders, for the Invention of "IMPROVEMENTS IN LOOMS FOR
WEAVING."
.
PROVISIONAL SPECIFICATION left by the said James Denby Lee
and James Crabtree at the Office of the Commissioners of Patents,
with their Petition, on the 13th November 1875.
•
We, JAMES DENBY LEE and JAMES CRABTREE, of Shipley, near
Leeds, in the County of York, Machine Makers and Ironfounders,
do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN LOOMS FOR WEAVING," to be as follows:---
This Invention relates to that class of looms for which Letters Patent
were granted to us, the said James Denby Lee and James Crabtree,
dated the 19th day of December 1870, No. 3312, and the present
improvements consist in a new construction and arrangement of parts

page_text: .
therein described for effecting the purpose set forth so as to simplify the
mechanism and operations thereof, dispensing with some of the parts
and reducing the first cost of the loom. For this purpose we dispense with
the parts marked G, H, I, J, K, L, M, N, O, P, Q, U, V, W, X, and Y,
and instead of which parts we construct and apply a rotary shaft hori-
zontally across the loom end frame immediately either above or below
the low shaft, mounted in suitable bearings. On this shaft we fix a star
wheel in such position that a finger fixed on the low shaft (by boss) can
give intermittent motion to the horizontal shaft at every rotation. On
this shaft we also fix a cylinder to carry a chain with a tappet or tappets
suitably arranged to operate the bell-crank lever T for sliding or moving
the star wheel E into or out of position to be operated by the peg
wheel D for actuating the tappet F, which lifts, raises, or lowers the
shuttle boxes according to the arrangement in a similar manner as in the
Specification referred to, and the above letters refer to the Specification
before mentioned. On the horizontal shaft we also fix another star
wheel of the same number of points as the other, to which is applied a
spring " hammer or holder for setting and holding the tappet chain in
suitable position at each movement, and there is also a hand wheel on
the said shaft to enable the attendant to turn the cylinder carrying the
tappet chain backward or forward at pleasure.
"
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Denby Lee and James Crabtree in the
Great Seal Patent Office on the 13th May 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES 2
DENBY LEE and JAMES CRABTREE, of Shipley, near Leeds, in the
County of York, Machine Makers and Ironfounders, send greeting.
WHEREAS Her. most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of November, in the
year of our Lord One thousand eight hundred and seventy-five, in the 3
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said James Denby Lee and James
Crabtree, Her special license, that we, the said James Denby Lee and
James Crabtree, our executors, administrators, and assigns, or such
others as we, the said James Denby Lee and James Crabtree, our
741 3 11
18

page_text: executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN LOOMS FOR WEAVING," upon the condition (amongst
others) that we, the said James Denby Lee and James Crabtree, our
executors or administrators, by an instrument in writing under our,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in
the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
. NOW KNOW YE, that we, the said James Denby Lee and James
Crabtree, do hereby declare the nature of the said Invention, and
in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement and
accompanying Drawings, that is to say :-
This Invention relates to further improvements upon a prior Invention
for which Letters Patent were granted to the said James Denby Lee and
James Crabtree, dated December 19th, 1870, No. 3312, and the present
improvements consist in the application of new parts whereby we are
enabled to dispense with much of the mechanism described in the Speci-
fication of the Patent aforesaid and produce the same results in a
simpler and more efficient manner and also effect a reduction in the first
cost of the loom. We dispense with the parts marked G, H, I, J, K,
L, M, N, O, P, Q, U, V, W, X, and Y, and instead of such parts we
apply others, for the fuller explanation of which we hereto annex a
Sheet of Drawings marked with figures and letters of reference.
The Drawings represent such parts of a loom as relate to our
improvements.
Fig. 1 is a side elevation; Fig. 2, back elevation; and Fig. 3, a plan
view.
A is the ordinary lever hinged to the loom end at a, and capable of
adjustment; B, the rod connecting the same with the shuttle boxes.
The other end of the lever is weighted. D is the peg wheel on the
tappet shaft and E the star wheel mounted on short shaft; F is the

page_text: tappet for working the lever A. The action of these parts is well
known, and does not require further description. For moving the star
wheel E into and out of gear with the peg wheel D we employ the
horizontal shaft G, to which intermittent rotary motion is communicated
by means of the pin H, which is attached by boss to the tappet shaft.
This pin at each revolution comes in contact with one of the arms of a
star wheel J mounted on the shaft G, and causes it to perform a partial
revolution. On this shaft is also a cylinder K. carrying a chain of cards
or links L, which act as tappets to operate the bell-crank lever M, on
which is mounted the clutch fork N which moves the star wheel. On
the shaft G is also a star wheel P of the same number of "points'
the wheel J, and as the latter revolves intermittently a spring hammer
or holder sets and holds the tappet chain L in the proper position at each
movement. R is a spring, which may be attached to any suitable point
for effecting the return movement of the lever M. By means of the
hand wheel S the attendant can turn the tappet cylinder backwards or
forwards at pleasure.
"
as
We claim as our Invention the combination and arrangement of parts
substantially as and for the purpose hercin shewn and described.
In witness whereof, I, the said James Denby Lee, for and on
behalf of myself and the said James Crabtree, have hereunto
set my hand and seal, this Eleventh day of May, in the year
of our Lord One thousand eight hundred and seventy-six.
"וחה
רדגו ה