PREVENTING WASTE OF WATER, TO BE CALLED A SELF-CLOSING COCK OR WASTE WATER PREVENTER
Year: 1854

page_text: (This Invention received Provisional Protection, but notice to proceed with the
application for Letters Patent was not given within the time prescribed
by the Act.)
PROVISIONAL SPECIFICATION left by Thomas Culpin at the Office
.of the Commissioners of Patents, with his Petition, on the 24th
November 1854.
I, THOMAS CULPIN, of 5, Devonshire Terrace, Blackheath Road, Greenwich,
in the County of Kent, Engineer, do hereby declare the nature of the said
Invention of "PREVENTING WASTE OF WATER, TO BE CALLED A SELF-CLOSING COCK
OR WASTE WATER PREVENTER," as more fully developed in the following descrip-
tion of the Drawings, whereby a continuous flow or waste of water will be
prevented, as the cock will close itself after a certain quantity of water has
passed; and therefore it is termed a self-closing cock or waste water preventer.
DESCRIPTION OF DRAWINGS.
Fig. 1, lever for turning cock; Fig. 2, valve and piston; Fig. 3, section of
plug; Fig. 4, front view of cock; Fig. 5, section of gland t; Fig. 6, cross
section of the cock above the piston; Fig. 7, cross section of ditto, below the
valve; Fig. 8, the whole of the parts when put together in section, making or
forming the complete cock or apparatus, which may be connected to the service
pipe by the screw a, a. In this section the valve c is shewn closed, and is
retained in that position by the pressure of the water coming through the
-service pipe, passing the orifice, and acting against the piston b by a power

page_text: superior to that acting in the contrary direction, to the extent that the area
of the piston b is greater than the valve c; the piston b being made to work
water-tight up and down the hollow of the plug d, and the valve c being
conical, and ground to fit the seat at c, as shewn in position, the rod connecting
the piston of valve being turned and passing loosely through the aperture
as at j.
b
It is evident, as parts are shewn here arranged, that no water could flow
out on account of the water way being closed by the valve at c. If, now, the
plug be turned half a revolution, the pressure will be cut off from b and c by
the solid part of the plug & coming round and closing the water way m and i,
and admitted at d by the passage o; the passage p being closed by the
same movement, and acting now on the top of the piston, will urge it down,
expelling the contents of the space 6 through the passage n, s, thereby closing
the water way by pressing the valve c with its seat at h, when no more water
will flow until the plug has been again turned the other half revolution, when
the passage at i being opened, the pressure is again brought against the under
side of the piston, and it will rise as before, expelling the water from above it
through the orifice r, p, during which time (that is, the passing of the piston
up the tube,) the water will pass the valve c in full flow. If then the size of
the passage or orifice i or j be so regulated to bear a proper proportion to the
water way m and h, this cock can be arranged to draw any quantity of water
at each turning or opening of the plug, say, 1, 2, 3, or any other number of
gallons, and cannot be left running to waste beyond the stated quantity. uis
a little stuffing forced down by the gland t; v, the square of the-plug, to fit
the lever, Fig. 1, at w. By the screwed nozzle x, the cock may be connected
with a pipe leading to a water-closet, or any other apparatus desired.
The Drawing represents a cock, fit for supplying a soil pan; but it is
evident it may be made of any other size, and the parts admit of modification
-and-variation to attain the same end, the principle and chief features remaining
the same; for instance, instead of the piston working up and down the hollow
of the plug, the end may be obtained by a flexible diaphragm-fixed-within-a
cavity, having the spindle or piston rod attached to its centre, &c.