IMPROVEMENTS IN TAPS OR VALVES
Year: 1862

page_text: PROVISIONAL SPECIFICATION left by Pierre Joseph Guyet at the Office-
of the Commissioners of Patents, with his Petition, on the 1st March
1862.
I, PIERRE JOSEPH GUYET, of Paris, in the Empire of France, Civil Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
TAPS OR VALVES," to be as follows:-
The distinctive features of my Invention consist in the arrangements for the
elastic seatings and packings, together with the general arrangement of the
whole apparatus, whereby tightness of the joints and packings, whatever be
the pressure of the water or fluid, is maintained, and whereby the taps or
valves are made to work easy under the most severe pressure.
The accompanying Drawings illustrate the manner in which the taps or
valves are constructed. Figure 1 is a transverse section. The body of the tap
is composed of three parts A, B, C, bolted together, the joints are made tight
with india-rubber ring joints D compressed in a recess as shown. The body A
is composed of a longitudinal box cast with it, and terminating in two pack-
ings, a flange H runs along the box, and inside the body A. The upper
surface of the valve is composed of two semicircular discs I, J, cast with a
longitudinal eye, their surface being formed of two semicircular india-rubber
joint rings M, N, compressed in the recesses O, P, by the semicircular
plates Q, R, bolted on the discs; I, J, S, is a wrought-iron shaft passing.
through the packing T, and the eyes of the two discs. The valve is set in.

page_text: motion through the shaft S secured to the discs. The shaft S receives on one
of its ends a lever U, by which, and by means of the regulating screw V, sup-
ported by cast-iron frames bolted on the flange of the body A of the tap, the
motion is transmitted. The shaft may be worked with equal facility by a
worm wheel and screw, or by any other means of applying motion. It will
be seen that by the disposition of the packings, any loss of water, or any com-
munication between the two compartiments of the tap is prevented. The
valves are equally balanced, for the pressure of the water acts on the upper
surface of one, and upon the under surface of the other, the valves being fixed
upon the same shaft. The dotted lines show the position of the valves when
open.
Figure 2 is a vertical section of a modification of the tap or valve last
described. A is the inner body of the tap, fitted with two cross pipes B, C,
for forming connections with the-water pipes; the pipe C communicates with
the inside A by two openings E, F. The body A is made tight at top by the
cover G fitted with a packing box H, and at bottom by the ribbed cover I.
The flange J cast with the main body A, holds an elastic ring K, kept there
by the bottom flange L of the cylinder M, which has in its top flange N a
second elastic ring O, kept there by the bottom flange P of the cylinder Q.
The compression of the two elastic rings K, O, is maintained by the top
cover G without any other flanges or bolts. These rings form the elastic
seatings for the two valves R, S, which are cast with the hollow shaft T, the
upper part of which passes through the packing H, and the lower part through
a three-armed eye U, cast with a flange J. The bottom of the shaft is stopped
by a stopper u screwed in it. In the upper part of the shaft is fixed a brass
nut V screwed upon a regulating screw X, free to move in the head Y of the
frame Z, bolted upon the cover. This screw is worked by, ordinary means.
The Drawing shows the communication interrupted between the two pipes,
with the water pressing upon the upper surface of the valve, S, and upon the
under surface of R, thus making a perfect balance in the valve shaft, which is
therefore totally independent of the pressure inside the pipes, or the diameters
of the valves. The dotted lines show the tap open.