IMPROVEMENTS IN MACHINERY FOR STENTERING OR FINISHING PROVISIONAL SPECIFICATION
Year: 1875

page_text: LETTERS PATENT to William Mather Pollock, of the Lounsdale
Bleach Works, in the County of Renfrew, North Britain, for the
Invention of "IMPROVEMENTS IN MACHINERY FOR STENTERING OR FINISHING
PROVISIONAL SPECIFICATION left by the said William Mather
Pollock at the Office of the Commissioners of Patents, with his
Petition, on the 18th May 1875.
I, WILLIAM MATHER POLLOCK, of the Lounsdale Bleach Works, in
the County of Renfrew, North Britain, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN MACHINERY FOR STENTERING OR
FINISHING WOVEN FABRICS, to be as follows, that is to say:―
This Invention relates to machinery for imparting what is sometimes
termed the "elastic finish" to a woven fabric by stentering apparatus,
arranged to give opposite longitudinal reciprocations to the selvedges of

page_text: the fabric; and the object is to simplify the driving details and to
render the starting and stopping of the reciprocating motions more
convenient.
The longitudinal selvedge bars to which the fabric is fixed are carried
on the opposite arms of horizontal levers, which are made to oscillate
about vertical axes, and the motion is imparted to these by a rod jointed
to one of them, and having its other end jointed to a block fitted to slide
in a grooved or slotted lever fixed on the upper end of a vertical shaft.
This vertical shaft has fast on it in a position, by preference below the
flooring, a lever which is connected by a rod to an eccentric on a con- ]
tinuously revolving or main driving shaft, which may by similar con-
nections drive any convenient number of machines.
' The rod which transmits the movements from the slotted lever is
connected by a link to a bell-crank hand lever, and when the rod is by
this hand lever moved so as to shift its block along the slot to the
centre of the lever the lever vibrates without imparting any movement
to the solvedge bars. Stops or catches are provided for retaining the
hand lever in the desired position, and a stop lever is fitted in con-
nection with the slotted lever to keep the block of the rod in its
outer position when the finishing operation is proceeding.
The punkahs or vibrating fans for hastening the drying of the fabrics
whilst being finished are worked by a similar arrangement of slotted
lever, so that they can be put into or out of action without stopping the
main driving shaft.
SPECIFICATION filed in pursuance of the conditions of the Letters 2
Patent, and of an Order of the Lord Chancellor, by the said William
Mather Pollock in the Great Seal Patent Office on the 27th
• November 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
MATHER POLLOCK, of the Lounsdale Bleach Works, in the County of 3
Renfrew, North Britain, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of May, in the year of
our Lord One thousand eight hundred and seventy-five, in the thirty-

page_text: eighth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Mather Pollock, Her special licence,
that I, the said William Mather Pollock, my executors, administrators,
and assigns, or such others as I, the said William Mather Pollock, my
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 Ircland, tho
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
MACHINERY FOR STENTERING OR FINISHING WOVEN FABRICS," upon the con-
dition (amongst others) that I, the said William Mather Pollock,
my executors or administrators, by an instrument in writing under
my, 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 on or before the Eighth day of December,
One thousand eight hundred and seventy-five.
NOW KNOW YE, that I, the said William Mather Pollock, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement in writing, reference being had to the accom-
panying Drawings, that is to say:-
My said Invention relates to machinery for imparting what is some-
times termed the "elastic finish” to a woven fabric, by means of ston-
tering apparatus arranged to give opposite longitudinal reciprocations to
the selvedges of the fabric whilst it is being dried in a starched or
dressed condition, and my object is to simplify the driving details, and
to render the starting and stopping of the reciprocating motions more
convenient.
With my improved arrangements a number of stentering machines
may be driven from the same main shafting, and each of the machines
can have its motion started and stopped independently of and without
interfering with the other machines. Eccentrics or cranks on the main
or first-motion shaft, arranged by preference below the flooring, carrying
5 the stentering machines are connected to levers on vertical shafts
appertaining one to each machine, and these vertical shafts are by the
revolving eccentrics or cranks made to rock continuously; the motion

page_text: of each being however transmitted to the machinery it operates on
through the intervention of a slotted lever and link, which without con-
necting or disconnecting the parts admits of its being rendered effective
or non-effective when required.
. And in order that my said Invention and the manner of performing
the same may be properly understood, I hereunto append a Sheet of
explanatory Drawings to be herein-after referred to, and representing
parts of a stentering machine as fitted with my improved driving
apparatus. In these Drawings the same reference numerals are used
to mark the same or like parts wherever they are repeated.
. Figure 1 of the Drawings is a plan, and Figure 2 is an end elevation.
The longitudinal selvedge bars 3 to which the fabric is fixed are carried
on the opposite arms of a number of horizontal cross levers, of which
one, 4, is shown in Figure 1 and partly in Figure 2. The cross levers 4
are carried on central pedestals, 5, and aro made to oscillate about
vertical, axes, so as to impart the desired longitudinal reciprocating
motions to the selvedge bars 3 by a rod or link 6 jointed to one of them,
and having its other end jointed to a block 7 fitted to slido in a grooved
or slotted lever 8 fixed on the upper end of a vertical shaft 9, which is
carried in a pedestal 10, and is one of those continuously rocking shafts
herein-before referred to, being driven from a continuously revolving
shaft by an eccentric or crank connected to a lever fast on it below the
flooring. The rod 6 which transmits the movements from the slotted
lever 8 is connected by a link 11 to a bell-crank hand lever 12, 13, by
means of which the block 7 can be shifted along the slot of the lever 8.
When the block 7 at the end of the rod 6 is in the position in which it
is shown in full lines in Figuro 1, namely, over the centre of the vertical
shaft 9, the vibration of the lever 8 imparts no motion to the cross
lever 4; but when the rod 6 and block 7 are shifted into the positions
indicated by the dotted lines, then the full movement is imparted to the
cross lever 4. The hand lever 13 has catches and stops fitted in con-
nection with it to hold it in its different positions; and a stop lever 14,
shown only in Figure 2 is jointed upon the top of the slotted lever 8 to
keep the block 7 of the rod 6 in its outer position whilst the finishing
operation is proceeding, this stop lever 14 being formed with a projection
which enters the slot behind the block 7.
The punkahs or vibrating fans for hastening the drying of the fabrics
whilst being finished are worked by a similar arrangement of slotted

page_text: levers (8) on continuously rocking shafts, so that they can be put into
or out of action without stopping the main driving shaft.
•
Having thus particularly described my said Invention and the
manner of performing the same, I have to state that I do not restrict
myself to the precise details herein described or delineated, but that
what I believe to be novel and original and claim as the Invention
secured to me by the herein-before in part recited Letters Patent is,—
1. The connecting of the cross lever of "elastic finish" stentering
machinery to a continuously vibrating slotted lever, by a rod which can
be shifted to or from the centre of such slotted lever, substantially as´
herein-before described.
2. The actuating of vibrating punkahs connected with stentering
or finishing machinery by means of a continuously vibrating slotted
lever and rod, which can be shifted to or from the centre of such slotted
lover, as herein-before described.
In witness whereof, I, the said William Mather Pollock, have
hereunto set my hand and seal, this Sixteenth day of November,
in the year of our Lord One thousand eight hundred and seventy-
five.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
W. M. POLLOCK. (L.S.)