An Improved Valve for Siemens' Gas Furnaces.
Year: 1888

page_text: Date of Application, 29th Oct., 1888
Complete Specification Left, 29th July, 1889-Accepted, 31st Aug., 1889
PROVISIONAL SPECIFICATION.
An Improved Valve for Siemens' Gas Furnaces.
I, JOHN LESTER STEVENSON of Cwm Avon Works Cwm Avon Port Talbot
Glamorganshire Engineer do hereby declare the nature of this invention to be as
follows:-
The improved valve is built in numerous distinct parts any one of which can be
separately replaced should it become broken by the heat or other cause.
Such a valve is represented by the annexed drawings Figures 1. 2 and 3. Self
closing hinged escape lids are provided to open in case of explosion as represented by
Figure 4.
Date
day of October 1888.
COMPLETE SPECIFICATION.
An Improved Valve for Siemens' Gas Furnaces.
I, JOHN LESTER STEVENSON, of Cwm Avon Works, Cwm Avon, Port Talbot,
Glamorganshire, 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 :-
This invention has for its object an improved valve for Siemens gas furnaces.
The improved volvo is built in
up
distinct parts any one of which can
be separately replaced should it become broken by the heat or other cause.
Self closing hinged escape lids are provided to open in case of explosion.
In order that my invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
be separately replaced should it become broken by the heat or other cause.
Self closing hinged escape lids are provided to open in case of explosion.
In order that my invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation of the valve as arranged for the admission of air to the
furnace.
Figure 2 is a longitudinal and vertical section of the valve as arranged for the
admission of gas.
Figure 3 is a plan, one half in section, and
Figure 4 is an end elevation of the valve.
In Figure 1 X is the mouth by which the air enters, it is fitted with a regulating
cone, and in Figures 2 and 4 Y is the trunk by which the gas is led to my improved
valve. The valve is built up of the following parts :-four pieces a, a, b, b, compose
the box in which the flap c works; the side pieces a support the axis c¹ of the flap
in suitable bearings and they have ledges. a upon them for the flap to close against.
The flap to whichever side it may be turned, is held against the ledges by a weight
upon an arm fixed upon the axis c' as the drawings indicate. The end pieces bbare
rectangular frames with passages through them and the air or the gas flows through
the passage in one or other of the frames according to the position in which the
flap c is placed. After passing the flap the air or the gas is led into the furnace by
channels which are each built up of the following parts :-there are two side pieces d d
which fit over the frames 6 and are held up to them by the tie rods d' d¹. There is
a top piece e fixed to the side pieces and connecting them together; this top piece
also fits upon the frame b. The top piece e also is provided with lugs e¹e which
receive a joint pin. There is a cross piece f extending between the side pieces dat
their outer ends and connecting them together at this part. Finally there is the

page_text: lid g connected with the top piece e by the joint pin h. The lid closes by its own
weight against the piece and the top piece e and it fills the space between the side
pieces d so as to confine the air or gas in the channel in which under ordinary circum-
stances it is desired that it should flow; but if from sudden ignition or explosion
there should be pressure within the channel the lid lifts and affords a prompt relief.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declaro that
what I claim is :-
1. A gas furnace valve substantially as described and built up in numerous parts as
herein set forth.
2. In combination with a gas furnace valve substantially as described the self
closing hinged escape lids as herein set forth.
3. A gas furnace valve substantially as represented by the annexed drawings.
Dated this 27th day of T.1., 1990
JNO. STEVENSON.