IMPROVEMENTS IN TAPS OR COCKS
Year: 1879

page_text: LETTERS PATENT to Herbert John Allison, of the Firm of Allison Brothers,
A
Patent Agents, of 41, Southampton Buildings, Holborn, in the County of
Middlesex, for the Invention of "IMPROVEMENTS IN TAPS OR COCKS."
communication from abroad by Hector Monchain, of Bouchain, in the Depart-
ment of Nord. France.
Sealed the 11th June 1880, and dated the 17th December 1879.
PROVISIONAL SPECIFICATION left by the said Herbert John Allison at the
Office of the Cominissioners of Patents on the 17th December 1879.
HERBERT JOHN ALLISON, of the Firm of Allison Brothers, Patent Agents, 41,
"IMPROVEMENTS IN
Southampton Buildings, Holborn, in the County of Middlesex.
TAPS OR COCKS." A communication from abroad by Hector Monchain, of Bouchain,
in the Department of Nord, France.
This Invention consists of a tap or cock formed so as to prevent leaking or the
escape of fluids, gases, or vapours. The plug A, as shown in the accompanying
Sheet of Drawings, is of ordinary construction, but the shell or body B differs from
that of ordinary taps or cocks in as much that it is provided,-
1st. At the upper part with a nut E, which by means of the gland F serves to
forin a tight joint; this joint, heing tightened down by means of the washer or
packing and the gland F, pievents leakage from the top of the tap or cock.
2nd. The upper part in the interior is provided with a shoulder which forms &
seat for the washer or packing C, with which the joint is made, thus allowing the
plug A free play in interior of the shell B without the nut E exercising any pressure
thereon.
3rd. At the lower part it is formed with a shoulder K, upon which a screwed
cap J bears, so as to form a joint by means of an india rubber or other suitable
The screwed
washer I, thus hermetically closing the bottom of the tap or cock
cap J, besides preventing leakage from the bottom of the tap or cock, has further
the advantage of allowing in its internal cavity the free working of the nut H and
the washer G, as in ordinary taps or cocks.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, and of
an Order of the Lord Chancellor, filed by the said Herbert John Allison in the
Great Seal Patent Office on the 19th June 1880.
HERBERT JOHN ALLISON, of the Firm of Allison Brothers, Patent Agents, 41,
Southampton Buildings, Holborn, in the County of Middlesex. "IMPROVEMENTS IN
TAPS OR COCKS." A communication from abroad by Hector Monchain, of Bouchain,
in the Department of Nord, France.
This Invention consists of a tap or cock formed so as to prevent leaking or the
escape of fluids, gases, or vapours.
In the accompanying Sheet of Drawings Fig 1 shows an elevation, and Fig. 2 a
vertical section of the tap or cock.
The plug A is of ordinary construction, but the shell or body B differs from that
of ordinary taps or cocks in as much that it is provided,―
First. At the upper part with a nut E, which by means of the gland F serves to
form a tight joint; this joint, being tightened down by means of the washer or
packing C and the gland F, prevents leakage from the top of the tap or cock.
Second. The upper part in the interior is provided with a shoulder D, which
forms a seat for the washer, allowing the plug A free play in the interior of the
shell B without the nut E exercising any pressure thereon.
Third. At the lower part it is formed with an internal shoulder K, upon which a
screwed cap J bears, so as to form a joint by means of an india rubber or other
suitable washer I, thus hermetically closing the bottom of the tap or cock. The
screwed cap J, besides preventing leakage from the bottom of the tap or cock, has
further the advantage of allowing in its internal cavity the free working of the
nut H and the washer G, as in ordinary taps or cocks.
Having now described the nature of the said Invention and the manner of
carrying the same into effect, as communicated to me, I claim,-
First. The combination of the nut E, the gland F, and the washer or packing C,
substantially as herein described and shown in the Drawings..
Second. Providing the upper part in the interior with the shoulder D, which
forms a seat for the washer or packing C, for the purpose described.
Third. The combination of the shoulder K, the screwed cap J, and the washer I,
substantially as herein described and shown in the Drawings.
In witness whereof, I, the said Herbert John Allison, have hereunto set my
hand and seal, this 17th day of June, in the year of our Lord 1880.
HERBERT I ALLISON
(LS)