CERTAIN IMPROVEMENTS IN TAPS OR COCKS FOR STEAM, WATER, AND OTHER SIMILAR PURPOSES
Year: 1877

page_text: LETTERS PÅTENT to James Parkes, of Birmingham, in the County of Warwick,
for the Invention of "CERTAIN IMPROVEMENTS IN TAPS OR COCKS FOR STEAM,
WATER, AND OTHER SIMILAR PURPOSES."
Sealed the 30th November 1877, and dated the 1st June 1877.
PROVISIONAL SPECIFICATION left by the said James Parkes at the Office of
the Commissioners of Patents on the 1st June 1877.
JAMES PARKES, of Birmingham, in the County of Warwick. "CERTAIN IM-
PROVEMENTS IN TAPS OR COCKS FOR STEAM, WATER, AND OTHER SIMILAR
PURPOSES."
My Invention consists of the improvements herein-after described in the con-
struction of taps whereby they are rendered sound and secure to steam or water;
hitherto the practice has been to pack them with the ordinary packing, but this
was always liable to leakage.
I construct a tap or cock, dispensing with the packing by adopting a conical valve
inside the tap, at the top or upper part thereof, secured in its place by a spiral
spring and a cap; inside this conical valve I arrange a square plug, screwed
exteriorly at its base; upon this is fed a cross bar which serves to rise and fall
another valve at its base; this valve has a corresponding seat at the lower part of
the tap, so that when screwed down it is steam or water tight; the action reversed
brings on the steam or water.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Parkes in the Great Seal Patent Office on the 1st December
1877.
JAMES PARKES, of Birmingham, in the County of Warwick. "CERTAIN IM-
PROVEMENTS IN TAPS OR COCKS-FOR- STEAM, WATER, AND OTHER SIMILAR
PURPOSES."
My Invention consists of the improvements, herein-after described, in the con-
struction of taps, whereby they are rendered sound, secure to steam or water;
bitherto the practice has been to pack them with the ordinary packing, but this
was always liable to leakage.
I construct a tap or cock, dispensing with the packing by adopting a conical
valve inside the tap, at the top or upper part thereof, secured in its place.by.a.spiral
spring and a cap; inside this conical valve I arrange a square plug, screwed
exteriorly at its base; upon this is fed a cross bar which serves to rise and fall
another valve at its base; this valve has a corresponding seat at the lower part of
the tap, so that when screwed down it is steam or water tight; the action reversed
brings on the steam or water.
..
I will now proceed to describe my Invention more fully in detail, reference being
had to the Drawings hereunto annexed and to the letters marked thereon.
Fig. 1 represents a vertical section of my Invention; Fig. 2, a view in elevation.
" a "is the upper, and b the lower parts, held together by the screws c; d is a conical
valve actuated by the wheele, but held in its position by the spiral spring f: In the
interior of this said conical valve I have arranged a square plug ""g," and screwed
upon its exterior at the base; upon this is fed the cross bár or plate h, and by the
rising or falling of this, a corresponding motion is imparted to the valve i which
works in its base, finding its seat in the dividing section of the body indicated
at j.
Having thus described the nature and object of my said Invention, I would
observe in conclusion that what I claim as new and novel and desire to be secured
to me by the herein-before in part recited Letters Patent is;---
First. The improvements in taps or cocks for steam, water, and other similar
purposes," substantially as herein-before described and shewn on the accompanying
Drawings, or any mere modification thereof.
Secondly. The general arrangement and combination of the several parts, as
shewn on the Drawings in Fig. 1, as and for the purposes herein-before described.
In witness whereof, I, the said James Parkes, have hereunto set my hand
and seal, this Twenty-ninth day of November, in the year of our Lord
One thousand eight hundred and seventy-seven.