IMPROVEMENTS IN THE FITTINGS FOR GLASS WATER GUAGES.
Year: 1874

page_text: LETTERS PATENT to Samuel Hallam, of West Gorton, near the City
of Manchester, Engineer, and John William Lamb, of Manchester
aforesaid, Brassfounder, for the Invention of "IMPROVEMENTS IN THE
FITTINGS FOR GLASS WATER GUAGES.
زر
Scaled the 12th January 1875, and dated the 17th November 1874.
PROVISIONAL SPECIFICATION left by the said Samuel Hallam and
-
John William Lamb at the Office of the Commissioners of Patents,
with their Petition, on the 17th November 1874.
We, SAMUEL HALLAM, of West Gorton, near the City of Manchester,
Engineer, and JOHN WILLIAM LAMB, of Manchester aforesaid, Brass-
founder, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE FITTINGS FOR GLASS WATER GUAGES," to be as
follows:-
:-
Our improvements in fittings for glass water guages consist in applying
a self-acting valve above and below between the glass tube and the
boiler, so that in case the tube should break the pressure of the water or

page_text: steam in the boiler will instantly close the valve and prevent the escape
of the water and steam; also in applying a spindle to each valve for
opening them after the tube has been repaired.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Samuel Hallam and John William Lamb in the
Great Scal Patent Office on the 15th May 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, SAMUEL
HALLAM, of West Gorton, near the City of Manchester, Engineer, and
JOHN WILLIAM LAMB, of Manchester aforesaid, Brassfounder, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of November, in the
year of our Lord One thousand cight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Samuel Hallam and John
William Lamb, Her special licence that we, the said Samuel Hallam and
John William Lamb, our executors, administrators, and assigns, or such
others as we, the said Samuel Hallam and John William Lamb, our
executors, administrators, and assigns, should at any time agree with
and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "Iм-
PROVEMENTS IN THE FITTINGS FOR GLASS WATER GAUGES," upon the condition
(amongst others) that we, the said Samuel Hallam and John William
Lamb, our executors or administrators, by an instrument in writing under
our, or their, or one of our or their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Samuel Hallam and John
William Lamb, do hereby declaro the nature of our said Invention,
and in what manner the same is to be performed, to be particularly

page_text: described and ascertained in and by the following statement (that is to
| say):-
-
Our improvements in fittings for glass water gauges consist in applying
a self-acting valve above and below between the glass tube and the
boiler, so that in case the tube should break the pressure of the water or
steam in the boiler will instantly close the valve and prevent the escape
of the water and steam; also in applying a spindle to each valve for
opening them after the tube has been repaired.
And in order that our Invention may be fully understood and readily
carried into operation, we will proceed to describe the accompanying Sheet
of Drawings, reference being had to the figures and letters marked thereon.
Fig. 1 represents the lower tap of an ordinary glass water tube to
which our improvements are applied. a is the socket, in which the
bottom of the glass tube is fixed as usual. bis the screw passing
through the end of the boiler, and c the ordinary blow-off cock. d. is a
small ball or other valve, which remains in the position shewn by the
full line as long as the glass water tube remains intact, but the moment
the glass tube is broken the rush of steam and water from the boiler
forces the ball or other valve against the scating e, as shewn by the
dotted line, thereby preventing the escape of the steam and water. When
a fresh glass tube has been put in its place the attendant pushes the
valve off its seating by the spindle f, and the parts are then brought
again into their regular working condition.
Fig. 2 represents the top and bottom taps of a glass water tube con-
structed according to a modification of our Invention. In this arrange-
ment an ordinary mushroom valve d is used; and this valve is provided
with wings to guide it up and down in the seating e, which is formed in
the body of the tap. The spindle f is vertical, and is pressed down to
release the valve from its seating when required. The plug g under the
valve d may be furnished with a blow-off cock when the water contains
much sediment.
Fig. 3 represents the upper tap of a glass water tube constructed
according to another modification of our Invention, and particularly
adapted for high-pressure boilers. In this case the spindle f is provided
with a double valve h, i. The valve h is to close the communication
with the boiler when necessary, and the valve i is to close against the
seating ; when the packing of the stuffing box, through which the

page_text: spindle passes requires packing while the steam is up. The self-acting
valve d acts in the manner described in reference to Fig. 1.
Figs. 4 and 5 represent our improvements as applied to a marine
engine boiler. In this case the self-acting ball valve d is guided between
wings fixed to the plug g, and the tap k is for blowing off salt and other
sediment when required: The spindles ƒ for releasing the valves d are
connected to the cross heads and side rods m, which are raised and
lowered by a hook in the manner now customary in opening and closing
the blow-off cocks.
Having thus stated the nature of our Invention, and described several
convenient modes of carrying the same into operation, we wish to
remark that we do not limit ourselves to the details given, as the same
may be varied or modified, but that we claim, the application of self-
acting valves between the ends of the glass water tubes and the boiler
for the purposes described.
.
In witness whereof, we, the said Samuel Hallam and John William
Lamb, have hereto set our hands and seals, this Fourteenth day
of May One thousand eight hundred and seventy-five.