IMPROVEMENTS IN LOOMS FOR WEAVING."
Year: 1874

page_text: LETTERS PATENT to David Taylor and William Taylor, of Blackburn,
in the County of Lancaster, Cotton Manufacturers, for the Inven-
LETTERS PATENT to David Taylor and William Taylor, of Blackburn,
in the County of Lancaster, Cotton Manufacturers, for the Inven-
tion of "IMPROVEMENTS IN LOOMS FOR WEAVING."
tion of IMPROVEMENTS IN LOOMS FOR WEAVING.”
Sealed the 29th December 1874, and dated the 28th August 1874.
PROVISIONAL SPECIFICATION left 'by the said David Taylor and
William Taylor at the Office of the Commissioners of Patents,
with their Petition, on the 28th August 1874.
We, DAVID TAYLOR and WILLIAM TAYLOR, of Blackburn, in the
County of Lancaster, Cotton Manufactures, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN LOOMS FOR WEAVING,"
to be as follows:--
My Invention relates to certain machinery or apparatus for which
Letters Patent were granted to Thomas Longworth and Frances Lloyd
Jones, dated 25th January 1873, No. 298, the Specification of which
describes and illustrates a series of cam plates which are to be employed
for operating levers for raising the healds of the fancy borders of cotton

page_text: fabrics. These cam plates are made the required shape, according to the
number of picks during which it is desired that the heald should be
raised or lowered during one revolution thereof, and as these numbers
vary according to the patterns required to be woven new plates have to
be made. The result is that a great accumulation of plates takes place,
which is attended with considerable expense.
Our improvements consist in using instead of the cam plates a hollow
drum or barrel, upon the face or periphery of which are cut a number
of grooves or slots. In these slots are placed a number of tappits or
projections, which perform the operation of lifting the heald levers.
The tappits can be readily attached to or detached from the barrel, by
having the slots therein made V or dovetail shape with a corresponding
piece on the tappet to fit therein, or any other simple mode of fastening
may be employed.
(
SPECIFICATION in pursuance of the conditions of the Letters Patent
.
filed by the said David Taylor and William Taylor in the Great
Seal Patent Office on the 27th February 1875.
TH
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, DAVID
TAYLOR and WILLIAM TAYLOR, of Blackburn, in the County of Lan-
caster, Cotton Manufacturers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of August, in the
year of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did for Herself, Her heirs, and suc-
cessors, give and grant unto us, the said David Taylor and William
Taylor, Her special licence that we, the said David Taylor, and William
Taylor, our executors, administrators, and assigns, or such others as we,
the said David Taylor and William Taylor, our 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,"
"
い!

page_text: upon the condition (amongst others) that we, the said David Taylor and
William Taylor, 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 David Taylor and William Taylor,
do hereby declare the nature of our said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement, that is to say:-
This Invention relates to certain machinery or apparatus for which
Letters Patent were granted to Thomas Longworth and Frances Lloyd
Jones, dated Twenty-fifth January 1873, Number 298, the Specification
of which describes and illustrates a series of cam plates, which are to
be employed for operating levers, for raising the healds of the fancy.
borders of cotton fabrics. These cam plates are made the required shape,
according to the number of picks during which it is desired that the
heald should be raised or lowered during one revolution thereof, and as
these numbers vary according to the patterns required to be woven new
plates have to be made. The result is that a great accumulation of plates
takes place, which is attended with considerable expense.
Our improvements consist in using instead of the cam plates a hollow
drum or barrel, upon the face or periphery of which are cut a number
of grooves or slots. In these slots are placed a number of tappits or
projections, which perform the operation of lifting the heald levers.
The tappits can be readily attached to or detached from the barrel by
having the slots therein made V or dovetail shape, with a corresponding
piece on the tappit to fit therein, or any other simple mode of fastening
may be employed.
.
Such being the nature and object of this our said Invention, we will
now proceed to describe the same in detail, and in order that the same
may be fully understood, we have hereunto annexed a Sheet of Drawings
illustrative thereof, and have marked the same with figures and letters
of reference, the same letter referring to the same part in the several
views or figures.
.

page_text: Fig. 2 shews drum or barrel and tappets detached, and drawn about
full size; Fig. 3 is a cross section of Fig. 2.
Figs. 4 and 5 are similar views, the tappets being mounted on pins in
lieu of the slots.
A is a cross shaft (driven by the ordinary means) on which the drums
or barrels B, B, are mounted, there being secured to the face or periphery
of such drums or barrels the tappets or projections C, C. The latter are
placed on the barrel or drum by first passing the part D through the
opening E, whereon the neck F will enter the groove or slot G which it
fits and along which it is slid until at the required position, whereon it
is there secured by means of the set screw H, or in lieu of the slots G the
tappits or projections may be received and held on pins K, intervening
block pieces or washers L, L, being employed for the purpose of pre-
venting the tappets moving laterally, and which tappets it will be readily
understood may be changed as to their relative position on the barrel, so
as to act on any particular lever as required.
Having thus fully described the nature and particulars of this our
said 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 under-
stood that we lay no claim to the use of any of the parts herein referred
to or shewn by Drawings, when considered apart from the special
application and use herein described, and what we do claim is, the tappets
or projections constructed and applied to and in combination with a
drum or barrel, as and for the purpose herein fully described and illus-
trated.
In witness whereof, I, the said William Taylor, for and on behalf
of myself and the said David Taylor, have hereunto set my hand
and seal, the Twenty-fourth day of February, in the year of our
Lord One thousand eight hundred and seventy-five.
Witness,
WALTER BRIERLEY,
Patent Agent,
Halifax & Blackburn.
WILLIAM TAYLOR.
(L.S.)