Improvements in Anti-dip Valves employed in the Manufacture of Gas.
Year: 1893

page_text: Date of Application, 28th Mar., 1893'
Complete Specification Left, 27th Dec., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Anti-dip Valves employed in the Manufacture
of Gas.
I, WILLIAM CROSS, of the Gas Works, Leamington, Warwickshire, Gas
Engineer, do hereby declare the nature of this invention to be as follows:
The improvements relate to anti-dip valves employed in the manufacture of gas,
and have for object the production of an effective anti-dip valve which is capable
of being readily operated from the outside thereof in a special manner to be
hereinafter described.
To accomplish this, and to effect my improvements, I form, as part of the
ascension pipe from the retort, or as an intermediate apparatus between such
ascension pipe and the Hor bridge pipe, or other convenient point, a box or casing
of iron or other suitable material, and, by preference, provided with a hand hole
and lid for purposes of manipulation.
This box is provided at the top with an outlet to the H or bridge pipe, and, at
the bottom, is in communication with the ascension pipe, being also provided with a
seating for the valve to be hereinafter described, by means of which valve, the said
communication may be cut off.
The valve consists of a disc or plug carried at one end of a lever, the other end
of such lever being pivotted or fulcrumed upon a spindle which turns in suitable
bearings in the sides of the box or casing.
One end of this spindle passes through the casing to the outside thereof, where it
has keyed or otherwise attached to it, a wheel, or lever handle, whereby the valve
may be lifted out of operation at will.
As a variation, an exterior wheel attached to the end of the valve spindle may
be geared, by chain or other gearing, to a second wheel upon a lower plane, so as
to be more convenient for operation; and, in either case, the wheel may be provided
with arms, carrying sliding weights thereon, to control the action of the valve,"
whether at its highest or lowest extre.nity.
The valve has given to it sufficient pressure upon the seating, when in its
operative position, to form a seal, which seal is removed by altering the position of
the lever or wheel attached to the valve spindle, upon closing the retort lid, thus
opening the passage for the gas into the box. The gas, after so gaining the interior
of the box or casing, escapes from the top thereof into the H or bridge pipe, and
so to any succeeding apparatus, as will be well understood.
Variations in detail, such as the form of the valve and lever, and the casing, as
well as in the materials of which the different parts are composed, may be made.
without departing from the peculiar character of the invention.
Dated this 27th day of March 1893.
WILLIAM GADD, C.F.,
. 64, Barton Arcade, Manchester, Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Anti-dip Valves employed in the Manufacture
of Gás.
I, WILLIAM CROSS, of the Gas Works, Leamington, Warwickshire, Gas
Engineer; 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 :-
The improvements relate to anti-dip valves employed in the manufacture of gas,
and have for object the production of an effective anti-dip valve which is capable of
being readily operated from the outside thereof in a special manner to be hereinafter
described.
To accomplish this, and to effect my improvements, I form, as part of the
ascension pipe from the retort, or as an intermediate apparatus between such
ascension pipe and the H or bridge pipe, or other convenient point, a box or casing
of iron or other suitable material, and by preference provided with a hand-hole and
lid for purposes of manipulation.
This box is provided at the top with an outlet to the H or bridge pipe, and, at
the bottom, is in communication with the ascension pipe, being also provided with a
seating for the valve to be hereinafter described, by means of which valve, the said
communication may be cut off.
The valve consists of a disc or plug, carried at one end of a lever, the other end
of such lever being pivotted or fulcrumed upon a spindle which turns in suitable
bearings in the sides of the box or casing.
One end of this spindle passes through the casing to the outside thereof, where
it has keyed, or otherwise attached to it, a wheel, or lever handle, whereby the
valve may be lifted out of operation at will.
As a variation, an exterior wheel attached to the end of the valve spindle may
be geared, by chain or other gearing, to a second wheel upon a lower plane, so as
to be more convenient for operation; and, in either case, the wheel may be provided
with arms, carrying sliding weights thereon, to control the action of the valve,
whether at its highest or lowest extremity.
The valve has given to it sufficient pressure upon the seating, when in its
operative position, to form a seal, which seal is removed by altering the position of
the lever or wheel attached to the valve spindle, upon closing the retort lid, thus
opening the passage for the gas into the box.
The gas, after so gaining the interior of the box or casing, escapes from the top
thereof into the H or bridge pipe, and so to any succeeding apparatus, as will be
well understood.
Variations in detail, such as the form of the valve and lever, and the casing, as
well as in the materials of which the different parts are composed, may be made
without departing from the peculiar character of the invention.
But that the improvements may be better understood, I will, with the aid of
the accompanying drawings, proceed more fully to describe means employed
by me.
DESCRIPTION OF DRAWINGS.
Fig. 1. is a vertical section, and Fig. 2. a sectional plan, of apparatus arranged
in accordance with my improvements, while
Fig. 3. is an elevation of the same shewing one form of valve actuating mechanism
attached thereto.
The same letters indicate corresponding parts wherever they occur.
a. a. is the box or casing, having, by preference, a hand-lid a', and flanges a² a³
whereby such casing is connected with the ascension pipe from the retort, and the

page_text: Hor bridge pipe. b. b. is the valve, which, in the case shewn, is a disc, connected.
loosely to the lever c. c., the latter being fulcrumed on the spindle d. When such
valve b. is lifted off. its seating 6', it may assume a position such as is shewn by
dotted lines.
e. is a bell-crank lever, attached, at its centre of motion, to the spindle d, and
provided with a sliding weight ġ. which tends to preserve the extreme positions of
the lever e, and so keep the valve 6 either open or closed, until it is desired to
operate the same, when the bell-crank lever is actuated, for this purpose, by means
of the chain h.
The sliding weight may be designed, as shewn, as a weight sliding on a rod or
bar, but it may also be arranged as a sliding weight within a tube, such weight
either being composed of one piece, or of a number of pieces, such as shot or the
like, or other equivalent.
It will be obvious that, in lieu of the bell-crauk lever and chain, a wheel or
wheels, as already described, geared, or not, in any desirable manner, for convenient
operation, may be employed for the purpose of manipulating the anti-dip valve, as
shewn and indicated.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
In anti-dip valves, used in the manufacture of gas, the employment of a box or
casing, formed as part of the ascension pipe from the retort, or as an intermediate
apparatus between such ascension pipe and the H or bridge pipe, and containing a
levered plug or disc. valve, which valve is actuated from the exterior of the
apparatus, for the purpose and in manner substantially as herein shewn and
described.
Dated this 23rd day of December 1893.
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent.