Improvements in Pressure Apparatus for Cloth-finishing and other Rolling Machines.
Year: 1888

page_text: Date of Application, 13th Feb., 1888
Specification Accepted, 23rd Mar., 1888
COMPLETE SPECIFICATION.
Improvements in Pressure Apparatus for Cloth-finishing and other
Rolling Machines.
We, WILLIAM WALTON URQUHART, JOSEPH LINDSAY, and ROBERT ALLAN, of
Blackness Foundry, Dundee, in the County of Forfar, North Britain, Engineers,
do hereby declare the nature of this 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:-
Our said Invention is applicable to rolling machines of various kinds for treating
various fabrics and materials and especially to machines known as mangles and
calenders for finishing woven fabrics and to machines for rolling or finishing paper;
and it has for its object to improve the disposition or arrangement and combination
of the parts through which pressure is applied to the rollers of the machine, and to
provide for the lifting of the roller or rollers to which the pressure is applied, when
taking off the pressure or when desired. It is also an object of our present Invention
to arrange the parts so as to diminish the floor space required for cach machine as
compared with what is occupied by some existing machines.
In carrying out our Invention according to one modification, the pressure is applied
by means of hydraulic cylinders, from which it is transmitted in a novel manner to
levers arranged at right angles to the vertical plane of the rollers; and these levers
are placed on fulcra at the tops of the housings or gables of the machine such fulcra
being situated between the inner acting ends of the levers and their outer ends to
which latter the hydraulic pressure is applied. The hydraulic cylinders are placed on
the base of the machine, and their rams working vertically, act on vertical bars
connected to the outer ends of the levers and made massive so as to serve as counter-
weights for lifting the roller acted on when the hydraulic pressure is withdrawn.
Metallic or other suitable springs or elastic media are by preference interposed
between the levers and the parts acting on them, in order that the machine may be
slightly elastic in its action and operate without rigidity.
"
five-
And in order that our said Invention and the manner of performing the same may
be properly understood we hereunto append a sheet of explanatory drawings to be
hereinafter referred to, and showing the application of our improvements to a
bowl" (or five-roller) calendering machine. Figure, 1, is an end elevation of the
machine partly in section, and figure, 2, shows a modification of a detail..

page_text: In figure, 1, one of the end housings or gables, G, of the machine is shown with the
five rollers, A, B, C, D, E; and it is to be understood that the other gable has also
on and in connection with it parts like those shown in the figure. The bearing
block, H, of the top roller, A, is raised or lowered by means of a spindle, J, which for
adjusting purposes can be turned by means of a handwheel, K. The spindle, J, is
screwed through a block, indicated by dotted lines, which is pivoted between the
inner ends of two plates forming a lever, L, which is centered or fulcrumed on a pin
fixed in a bracket, M, cast on the top of the gable, G. The outer end of the lever, L
is connected through a spring, N, to. the upper end of a massive vertical bar, O, made
of such a weight as with a similar bar at the other end of the machine to be capable
of lifting the roller, A. The lower end of the bar, O, rests upon the top of the ram, P, of
an hydraulic cylinder, Q, in connection with which pipes and valve gear (not shown)
are provided for admitting and withdrawing water or other liquid under pressure.
The top of the ram, P, is of a spherical form and fits in a spherical cavity in the bottom
of the weight bar, O. The pressure of water or other liquid used in the cylinder, Q,
is sufficient to raise the preponderating weight of the bar, O, and to apply the desired
pressure to the top roller, A, through the lever, L.
The spring, N, shown in figure, I, is of a laminated kind; but a helical spring such
as is shown in figure, 2, may be used, or air confined in a cylinder and acted on by
a piston may be employed as a spring or any other convenient elastic medium.
We prefer to use hydraulic pressure as hereinbefore described but if desired the
pressure may be applied to the weight bars, O, in any other convenient way.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is—
1-Combining and arranging the parts of apparatus for applying pressure in cloth-
finishing and other rolling machines substantially in the improved manner hereinbefore
described and as shown in the accompanying drawings.
2-Combining counterweights with the pressure apparatus of cloth-finishing and
other rolling machines substantially in the manner and for the purposes hereinbefore
described.
3-Interposing springs between the outer ends of the pressure levers and the parts
acting on them in the improved manner hereinbefore described and as shown in the
accompanying drawings.
1 this Elloranth love of Fatima, 1888