IMPROVEMENTS IN COCKS AND TAPS
Year: 1884

page_text: TRUVIDIONAL SPECIFICATION,
I, CARLOS MANUEL PAULINO LAFIT of Brighton in the County of Sussex,
Engineer, do hereby declare the nature of my said Invention for "IMPROVEMENTS
IN COCKS AND TAPS " to be as follows:-
My improvements refer to the arrangement and construction of taps and cocks
provided with an additional stop or valve for the purpose of shutting off the supply
of water when desired, to avoid the necessity of turning off the water from the
main when repairs to the valve or seating are required.
In the specification of a patent granted to H. Beal No 29941875 the application
of a valve to the lower part of high pressure taps, is described. Said valve is fitted
to a screw spindle working through a stuffing box on under side of tap in such a
manner that the valve can be raised or lowered as required. Much inconvenience
is experienced in getting at the stem or spindle of valve, in this arrangement, to
close or open it when required.
According to this my Invention the inconvenience above mentioned is entirely
obviated and the spindle of regulating or stop valve is so situate as to be readily
accessible and the expense of manufacture is greatly modified as the extra stuffing
box for the additional valve is in my arrangement dispensed with.
In Cocks and Taps constructed according to this my Invention I cause the stem
or spindle of the screw plug or valve for opening the passage, to be made hollow
and in this hollow stem or spindle I cause the stem of the additional stop or
regulating valve, (which is beneath the main valve) to be inserted. The stem of
this additional valve I prefer to make with a square head, and I make it of such a
length that it projects above the top of hollow spindle before mentioned. A
screwed cap may be fitted to top of hollow spindle aforesaid to cover the head of
inner spindle.
When it is desired to remove the main valve for any purpose I unscrew the
aforesaid cap and with a key which fits the head of spindle or with a pair of pliers,
I turn same and draw the stop or regulating plug or valve to its seating and thus
close entirely the passage through the tap or cock. The main valve and spindle
may then be withdrawn and any repairs required effected.
Taps or Cocks constructed according to this my Invention are especially
advantageous for use on main pipes saving great waste of water and plumbers'
time in repairing.

page_text: "
I, CARLOS MANUEL PAULINO LAFIT, of Brighton in the County of Sussex,
Engineer do hereby declare the nature of the said invention for "IMPROVEMENTS
IN COCKS AND TAPS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement, reference
being had to the accompanying sheet of Drawings and to the letters and figures
marked thereon, that is to say :-
My improvements refer to the arrangement and construction of taps and cocks
provided with an additional or supplementary stop valve for the purpose of
shutting off the supply of water from the main valve when desired in order to
avoid the necessity of turning off the supply from the main when repairs to the
valve or its seating are required.
In the Specification of a Patent granted to H. Beach, No 2994 A.D. 1875, tho
application of a valve to the lower part of high pressure taps is described. The
said valve is fitted to a screw spindle working through a stuffing box on the
underside of the tap in such a manner that the valve can be raised or lowered as
required. In this arrangement much inconvenience is experienced in getting at
the stem or spindle of the supplementary valve for the purpose of closing or opening
it when required.
According to my present invention the inconvenience above mentioned is entirely
obviated and the spindle of the supplementary stop, valve is so situated as to be
readily accessible, and the expense of manufacture is greatly modified as the extra
stuffing box for the supplementary valve is in my arrangement dispensed with.
In cocks and taps constructed according to my invention, the stem or spindle A
(see the sheet of Drawings hereto annexed) of the main screw plug or valve B for
opening and closing the passage C, is made hollow, that is to say, is perforated
axially from end to end, and in this hollow stem or spindle A is inserted the stem D
of the supplementary screw stop valve E which is screwed into the body of the tap
beneath the main valve B. The stein D of this supplementary plug or valve E
is made square at the top or of other suitable shape adapted to receive a key or
other instrument by which the said stem D, with its valve E can be turned round.
The stem D is preferably made of such a length that it projects abovo the
top of the beforementioned hollow spindle A which is fitted with a screwed cap F
covering the top of the inner spindle or stem D and making a tight joint by means
of the clastic washer F¹ with the upper part of the spindle A so as to prevent
leakage. The opening at the bottom of the tap through which the supplementary
valve E is inserted is also closed with a screwed plug G to prevent leakage.
When it is desired to remove the main valve B for any purpose, the aforesaid
cap F is unscrewed, and the stein D is turned round with a key or other suitable
instrument applied to the head or top thereof; this causes the stop valve E to be
drawn to its seating H by means of the screw thread I and the passage C through
the tap or cock is thereby closed. The cap may then be removed, and the main
valve B with its hollow spindle withdrawn, and any required repairs to it or to its
seat K effected.
In the annexed Drawings Figures 1 and 2 are respectively longitudinal sectional
elevations of a bib cock and stop cock with my invention applied thereto, and
Figures 3 and 4 corresponding side elevations of the same.
Taps or cocks constructed in accordance with my invention are especially
advantageous for use on water main pipes, as a great saving of water and plumbers
time in repairing is thereby effected; they are also applicable for other liquida
г.

page_text: besides water and for steam, gas, or air. The supplementary stop valve may also
be used for regulating the supply to the main valve, as by closing the supplementary
valve more or less the supply can be reduced to any required limit however much
the main valvo is opened.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that I do
not claim generally the use of an additional or supplementary stop valve in taps or
cocks for the purpose of shutting off the supply from the main valve as I am
aware that the use of such additional or supplementary stop valve is not novel, but
that what I claim is :-
In a tap or cock with a supplementary stop valve for the purpose of shutting off
or regulating the supply to the main valve, the employment of a hollow or
axially perforated spindle or stem for the main valve or plug, with the
spindle or stem of the supplementary stop valve or plug passing through the
said hollow or perforated spindle or stem of the main valve, and with a cap
making a tight joint between the top or outer end of the spindle or stem of
the supplementary stop valve and the upper end of the spindle or stem of
the main valve substantially as herein before described, and illustrated in the
Drawings hereto annexed.