Improvements in Cocks or Valves.
Year: 1892

page_text: Date of Application (in United Kingdom), 15th June, 1892
Complete Specification Left, 15th June, 1892-Accepted, 13th Aug., 1892
Improvements in Cocks or Valves.
I, ERIK AUGUST BOLINDER, of Stockholm, in the Kingdom of Sweden,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement :-
The object of my invention is to construct a cock so that its opening and closing
is facilitated by the pressure in the conduit and that its closing which is effected
automatically does not produce any shock in the conduit.
The accompanying drawing shows two forms or modifications of the improved
cock.
Figure 1 is a sectional plan on the line v x and
Figure 2 is a vertical section of one form of my improved cock.
Figure 3 is a sectional plan on the line
y z.
Figure 4 is a vertical section of another form of the said cock.
A is the casing of the cock B the valve box which is in communication with the
supply pipe B and C is the usual outlet nozzle.
With the valve plate a which is pressed against its seat b by the water pressure
is, as usual combined a piston c behind which there is a space d in the elongated
part e of the casing A which serves as a cylinder for the piston. The valve plate a
the piston c and the reduced part uniting the same are provided with channels ff
which on the underside of the valve plate a are closed by valves g g the spindles of
which pass through the said channels into the space d. The said valves g g are
closed by the pressure of the water. By pressing the knob i attached to the bar /
the valves are opened by the sliding bar encountering the valve spindles and
displacing them inwards in the valve box. The water then passes into the space d
through the channels ff around the valve-spindles. By the pressure produced in
the space in this way, and by the sliding bar acting finally upon the piston c,
the cock is turned on (opened). The water will then escape through the outlet C
between the valve-plate and the piston. If the knob is released the small
valves as well as the main valve will be closed, the latter however only slowly
as the water in the space d offers resistance. The piston c not being tight the
water contained in the space d can however escape gradually so that the cock
may be turned off or closed.
The modification Figure 4 consists in forming the piston and the main valve
with one channel with a valve the spindle of the latter consisting of the
elongated sliding bar h, which at its lower end is provided with a valve plate g and
can be displaced through the main valve, so as to open the small valve by itself.
It is evident that at the same time there may be such accessory valves as shown
in Figures 2 and 4 and likewise that the spindle h may be arranged as a screw
n lieu of a sliding bar.

page_text: Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. An automatic and shock preventing cock having a space (d) arranged as usual
in the casing behind a piston combined with the valve which by one or more
channels (ff) passing through the same communicates with the supply pipe the
channels (f) being provided with valves (g g) which are held closed by the water
pressure in the conduit but which, when the cock is to be opened are first opened
by the spindle or sliding bar (h) movable with respect to the main valve and by
which the cock is turned on, with the object of creating a pressure in the space (d)
which assists in the opening of the main valve and that the main valve actuated
by the pressure in the conduit may slowly close itself in proportion as the water
contained in the space (d) escapes past the piston.
2. The arrangement of the accessory valve (f) above indicated which consists
of the valve spindle (h) passing with a certain amount of play through the piston
and the valve plate of the main valve-spindle and provided at the end passing
through the valve plate with a separate valve (g) which actuated by the water
pressure, stops the said play around the spindle, when the latter is not actuated
from without.
Dated this 15th day of June 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.