IMPROVEMENTS IN THE CONSTRUCTION OF WATER GUAGES AND IN THE MODE OF APPLYING OR FITTING THE SAME TO STEAM BOILERS
Year: 1882

page_text: LETTERS PATENT to Harry Slater of Derby in the county of Derby Gentleman
for an invention of IMPROVEMENTS IN THE CONSTRUCTION OF WATER GUAGES
AND IN THE MODE OF APPLYING OR FITTING THE SAME TO STEAM BOILERS
PROVISIONAL SPECIFICATION left by the said Harry Slater at the Office
of the Commissioners of Patents on the 5th June 1882.
HARRY SLATER, of Derby, in the county of Derby, Gentleman, "IMPROVEMENTS
IN THE CONSTRUCTION OF: WATER GUAGES AND IN THE MODE OF APPLYING OR
FITTING THE SAME TO STEAM BOILERS
A common cause of accident in steam boilers is the choking up of the tubes
connecting the water space with the indicating tube of the water guage by the
accumulation of sediment or calcareous deposit, a wrong indication being then often
given and the tube shewing plenty of water in the boiler when it may be nearly
dry.
Now my invention is designed to obviate this evil, and relates principally to the
construction and fitting of water guages so as to prevent the accumulation of
sediment in the same, and accident from extraneous causes.
I fit my guage tube or tubes in valve boxes or cocks having vertical passages
and dispense entirely with horizontal tubes. The cocks or valves screw or are
secured directly into a vertical malleable iron or other box secured inside the front
boiler plate, so that the water in the boiler passes directly and perpendicularly
through the guage instead of having to traverse horizontal tubes before reaching
the same, thereby carrying through all deposit in the water.
This method of fitting also prevents the glass from scurving.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Harry Slater in the Great Seal Patent Office on the 30th November
1882.
HARRY SLATER of Derby in the county of Derby Gentleman IMPROVEMENTS IN
THE CONSTRUCTION OF WATER GUAGES AND IN THE MODE OF APPLYING OR
FITTING THE SAME TO STEAM BOILERS
A common cause of accident in steam boilers is the choking up of the tubes
connecting the water space with the indicating tube of the water guage by the
accumulation of sediment or calcareous deposit a wrong indication being then often
given and the tube shewing plenty of water in the boiler when it may be nearly
dry.
Now my invention is designed to obviate this evil and relates principally to the
construction and fitting of water guages so as to prevent the accumulation of
sediment in the same and accident from extraneous causes.
I fit my guage tube or tubes in valve boxes or cocks having vertical passages
and dispense entirely with horizontal tubes. The cocks or valves screw or are
secured directly into a vertical malleable iron or other box secured inside the front
boiler plate so that the water in the boiler passes directly and perpendicularly
through the guages instead of having to traverse horizontal tubes before reaching
the same thereby carrying through all deposit in the water In some cases the
guage tube and cocks may be placed obliquely or diagonally instead of directly
perpendicular.
Fig 1 represents a front elevation of a guage fitted in the box
Fig 2 a vertical side section of the same.
A is the guage tube fitted into the cocks or valves B B¹ with vertical passages CC'.
The various details of the valves will be readily perceived by the drawing but I do
not bind myself to the exact form shown so long as the axes of the guage tube and
cock passages are coincident. D is the metal box shewn in Fig 2 bolted or rivetted
to the boiler plate E E, or otherwise secured thereto.
If necessary I may make the lower cock or valve with a hollow plug and
construct the body of the tap so as to give an outlet for trial or "blow-off"
purposes as shewn by dotted lines in Fig 2. Through this may be passed steam
water or both at the same time.
It will thus be seen there being no flats or ledges for sediment to deposit on the
normal state of the guage (the valves being open) should be clean as the water
circulates directly through it.
The guage tube can be readily taken out if broken for renewal or other purposes
and its lying beyond the actual face of the boiler should tend to preserve it from
breakage by being knocked against by the attendant or otherwise.
Having now described my invention, and the best mode known to me of
performing the same I would have it understood that I claim
Firstly the construction of water guages with the tube fitted into cocks or valves
having their passages throughout in the same plane as the axis of the tube so that
the water shall have a direct passage through the same as and for the purposes
described.

page_text: Secondly the mode of fitting the guage to steam boilers by securing the said
vertical or straight-passage cocks or valves in a box or case projecting into and
bolted rivetted or secured to the boiler as and for the purposes described.
In witness whereof I the said Harry Slater have hereunto set my hand and
seal this twenty fifth day of November, in the year of our Lord One
thousand eight hundred and eighty two,
HARRY (L.S.) SLATER.