IMPROVEMENTS IN GAS GOVERNORS
Year: 1879

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for the Invention of "IMPROVEMENTS IN GAS GOVERNORS."
A communication from abroad by Francis David Daly, of Toronto, in the
Dominion of Canada, Gentleman.
Sealed the 10th October 1879, and dated the 7th May 1879.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 7th May 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN GAS GOVERNORS." A communication from abroad by Francis David Daly, of
Toronto, in the Dominion of Canada, Gentleman.
The object of the Invention is to provide a governor for automatically regulating
the supply of gas in proportion to the quantity required for consumption, and
consists of a metallic chamber, the interior of which is divided by a diaphragm
connected to and operating a valve which the gas must pass before gaining access
to the riser or distributing pipe. The chamber beneath this diaphragm has two
openings, one protected by the valve referred to, the other leading into the riser or
distributing pipe. A small orifice connects the chamber above the diaphragm with
the outside atmosphere, the pressure of which is consequently always acting, upon
the upper side of the said diaphragm, causing the valve to operate.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the 5th
November 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
O Patents, of 67, Strand, in the City of Westminster, Civil Engineer, "IMPROVEMENTS
Irina A. 1

page_text: IN GAS GOVERNORS." A communication from abroad by Francis David Daly, of
Toronto, in the Dominion of Canada, Gentleman.
This Invention relates to an improved gas governor, and the object of the Inven-
tion is to produce an automatic gas governor which will be free from unpleasant
odour, will not easily wear out, will be reliable, and which is not susceptible of
being tampered with. To effect these objects the connection between the diaphragm
and the spindle of the cut-off valve is made with cup shaped washers; and a small
passage between the two chambers separated by the diaphragm is provided, which
leads into the riser pipe, and carries off from the upper chamber the disagreeable
odour caused by the deposit of condensed gas settling on the diaphragm. This
passage also admits sufficient gas into the upper chamber to cause the pressure on
the upper face of the diaphragm required to make the valve automatic in its
action.
In the accompanying Drawings Figure 1 is a' sectional elevation on the line x, y,
and Figure 2 is a plan on the lines, w.
A is a metal case, preferably of the shape shewn; B is a diaphragm of leather or
other suitable material fastened to the flange C. The cut-off valve spindle passes
through the diaphragm B, and is secured to it by the check nuts E. Between
these nuts on either side of the diaphragm cup-shaped washers F, made of leather
or any other suitable material are secured. G is a passage leading from the
chamber above the diaphragmn to the riser pipe H, and I is a stop cock to this
passage.
Instead of the passage G being situated in the position shewn, its position could
be altered if desired, the essential point being to connect the chamber above the
diaphragm with the riser pipe H.
In the operation of gas governors it is found that owing to the continual recip-
rocating motion of the diaphragm the material of which it is made is soon cut
through at the point of connection with the valve spindle. To overcome this defect
the cupped washers F are employed, and to further improve the diaphragm the
edges of the flange C are rounded. With this .construction the diaphragm does not
come in contact with any sharp edges as hitherto, and its durability is much increased.
When the gas is passing through the burners and the passage G is open the gas
in the chamber above the diaphragm will naturally flow up the riser, carrying
'with it any moisture caused by condensation of the gas; at the same time the
pressure in the upper chamber to govern the action of the diaphragm and cut-off
valve is maintained without the necessity of using weights, as commonly done.
As the operation of gas governors is now well known it is not necessary to enlarge
further.
What I claim as new and desire to secure by Letters. Patent is,―
1. The cupped washers F on the spindle D, in combination with the diaphragm
B, fastened by the rounded flange C to the body of machine, substantially as shewn
and described, and for the purpose set forth.
2. The passage G connecting the riser H and chamber above diaphragm, in com-
bination with the stop-cock I, substantially as and for the purpose set forth.
3. The riser pipe H extending downward to a point below the diaphragm, and
connecting with the upper chamber by means of the passage G or its equivalent,
substantially as shewn and described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set
my hand and seal, this Fifth day of November, A.D. 1879.