Improvements in Cocks.
Year: 1890

page_text: Date of Application, 29th Mar., 1890
Complete Specification Left, 24th Dec., 1890-Accepted, 24th Jan.. 1891
PROVISIONAL SPECIFICATION.
Improvements in Cocks.
We, JOHN DEWRANCE and GEORGE HENRY WALL, both of 158, Great Dover
Street, Lambeth, in the County of Surrey, Engineers, do hereby declare the nature
of this invention to be as follows:-
We construct the cock with surfaces surrounding the waterway upon which the
taper plug forms tight joint. These surfaces we prefer to pack with cemented:
asbestos. In order to reduce friction to a minimum, we allow the pressure free
access to the top and bottom of the plug and provide a spindle only sufficiently large
to turn the plug. In order to insure sufficient strength this spindle may be separate
and of steel. The spindle passes through a cover by a stuffing box and has a shoulder
upon which the packing rests so that the pressure of the plug upon the surfaces
around the waterway is regulated by the gland of this stuffing box.
When it is desired to rotate the plug by gear we provide suitable teeth upon the
large end of the plug and a worm wheel is mounted inside the cover, actuated by a
spindle passing out through a stuffing box, in this case the plug may be pressed down
upon its surfaces by a screw plug having a centre or in any suitable manner but we
prefer to form the plug with a shouldered spindle passing out through a stuffing box
which also serves to indicate the position of the plug.
Dated this 28th day of March 1890
JOHN DEWRANCE.
GEORGE HENRY WALL.
COMPLETE SPECIFICATION.
Improvements in Cocks.
We, JOHN DEWRANCE and GEORGE HENRY WALL, both of 158 Great Dover
Street, Lambeth, in the County of Surrey, 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 :-
We construct the cock with surfaces surrounding the waterway upon which the
taper plug forms a tight joint, these surfaces we prefer to pack with cemented asbestos.
In order to reduce friction to a minimum, we allow the pressure free access to the top
and bottom of the plug and provide a spindle only sufficiently large and strong to
turn the plug, this spindle may be separate and of steel, manganese bronze, or other
suitable tough material. The spindle passes through a cover by a stuffing box and
has a shoulder upon which the packing rests so that the pressure of the plug upon
the surfaces around the waterway is regulated by the gland of this stuffing box.
When it is desired to rotate the plug by gear we provide suitable teeth upon the
large end of the plug and a worm wheel is mounted inside the cover actuated by a
spindle passing out through a stuffing box, in this case the plug may be pressed down
upon its surfaces by a screw plug having a centre or in any suitable manner, but we
prefer to form the plug with a shouldered spindle passing out through a stuffing box
which spindle also serves to indicate the position of the plug.
On the accompanying sheet of drawings,
Fig. 1 is a sectional elevation and Fig. 2 is a cross section with the plug removed.
a is the body, b is the plug, c is the spindle by which the plug is turned d is the cover
and e is the gland. Fig. 2 shews clearly the grooves of packing surrounding the
water-ways and they are also shewn by dotted lines in Fig. 1. The plug is open at
the bottom, and is the hole through which the steam or other fluid pressure is
admitted to the space between the cover d and the top of the plug.

page_text: Fig. 3 is a part sectional elevation and Fig. 4 a sectional plan shewing the enclosed
gear used to rotate the plug more slowly than can be done with a lever, in this case
also a is the body, 6 the plug, c the spindle that indicates the position of the plug,
d the cover, e the gland, the worm engaging in the teeth formed on the plug 6 and
which worm is turned by the handle g.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
I. The improved apparatus and arrangement whereby in a cock having packed
grooves surrounding the water-ways the plug is balanced substantially as illustrated
and described.
II. The improved apparatus and arrangement for turning the plug substantially as
described and as illustrated by Figs. 3 and 4.
Dated this 24th day of December 1890
JOHN DEWRANCE.
GEORGE HENRY WALL.