Improvements in and connected with Gas Heating Apparatus.
Year: 1896

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Gas Heating Apparatus.
We, THOMAS FLETCHER of Thynne Street, Warrington in the County of
Lancaster, Manufacturer of Gas Apparatus, WILLIAM RUSSELL of Scotia
Foundry, Pendleton, in the County of Lancaster, Iron Founder, and FLETCHER
RUSSELL & Co. LIMITED, of Thynne Street, Warrington in the County of
Lancaster, Manufacturers of Gas Apparatus and Iron Founders, 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 :-
This invention relates to gas heating apparatus in, or in connection with which,
it is desirable to reduce the size of the gas flame when the apparatus is temporarily
out of use. For example, in a tailor's gas stove, it is desirable to reduce the flame
employed in heating a particular iron when that iron is removed from the stove,
and to again turn up the flame when the iron is replaced in the stove. The object
of our invention is to provide means whereby the gas is turned down or the flame is
lowered, and is again turned up as may be required. We accomplish this by causing
the opening and closing of a door upon a vertical hinge or pivot to effect the
turning of a tap through which the supply of gas passes, the supply of gas being
reduced when the door is open, and increased when it is closed as hereinafter
described.
The accompanying drawings illustrate our improvements as applied to one com-
partment of a tailor's gas stove, and will be hereinafter referred to, but it will be
understood that our invention is not limited to this particular apparatus but may
be applied to other similar gas heated apparatus in which there is a hinged door
opened when the apparatus is out of use, and closed in use.
In these drawings, Figure 1 represents a diagrammatic plan of the gas
controlling device, and Figures 2 and 3 shew it in side and end elevation
respectively.
G is the gas supply pipe, which generally supplies a number of heating
chambers, each of which is closable by a hinged door D. Each brauch from
the supply pipe G may be provided with a stop cock S which is turned and
remains full on when the apparatus is in use, or the stop cocks may, in some
cases, be dispensed with. Above the stop cock on each branch pipe there is a
control cock C, the plug of which is provided with a bifurcated lever L. J is the
gas jet, and I the burner injection tube.
Each door is provided with a projecting part or arm, constructed and adapted to
engage with the bifurcated lever and to operate it in such a manner that when the
door is opened, the lever is moved and thereby the control cock C is partly closed,
and when the door is closed the lever is moved in the reverse direction and the cock
is re-opened. As shewn by the drawings, the projection employed to actuate the
control cock through the lever L consists of an arm A, secured to the lower end of
the pivot upon which the door is fixed. This pivot protrudes through a hole in the
plate P, below which the arm moves.
In the arrangement illustrated the arm A does not come into contact with either
of the limbs of the biturcated lever L until the door has almost completed its
opening movement. It then comes against the limb and its further movement in
the direction of the arrow, Figure 1, causes the lever L to move over to the required
extent and turn down the gas. The arm A and the ends of the lever L are now in

page_text: the position indicated by the dotted lines in Figure 1. The second limb has now
moved into the path of the arm A so that the action of closing the door also moves
the lever back until the gas has been turned full on. The limb has then moved
out of the path of the arm A and the latter is free to continue its movement with
the closing door. The limb is now in a position to be operated by the arm the
next time the door is opened.
It will of course be understood that the ends of the lever may be differently
formed or the arm and the lever may be differently arranged so as to engage with
or disengage from one another at any desired point during the opening or closing of
the door.
In all the figures the arm is illustrated in the position in which it is beginning to
move the lever L to effect the lowering of the gas.
It will be obvious that we may replace the arm A by a pin or corresponding
projection from the lower edge of the door, which projection would pass through
and work in an arc slot having its centre of curvature perpendicular to the centre
of the hinge.
Thus, when an iron is withdrawn from the stove, the door must be opened and at
the same time the gas is lowered and remains lowered so long as the door is open.
After the iron is replaced the door is again closed and the gas supply is automatically
increased as hereinbefore described.
We are aware that the plug of a gas cock has been directly connected with the
horizontal hinge of a door in gas apparatus, for a similar purpose, but this arrange-
ment has disadvantages which are entirely removed by our invention.
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 :-
In gas heating apparatus the herein before described means for increasing and
reducing the gas supply by the movement of a hinged door, consisting essentially
of a plug cock on the gas supply branch, a bifurcated lever attached to the plug
of the cock and an arm or projection from the door capable of engaging with the
bifurcated lever and moving it in either direction, constructed and arranged
substantially as herein before described and as illustrated by the accompanying
drawings.
Dated this 30th day of April A.D. 1896.
W. E. HEYS & SON,
Agents for the Applicants.