Year: 1886

page_text: Date of Application, 25th Oct., 1886..
Complete Left, 23rd July, 1887.
Complete Accepted, 30th Aug., 1887.
I, JOHN MITCHELL of 14 Belgrave Street, Glasgow, in the County of Lanark,
Scotland Plumber do hereby declare the nature of this invention to be as follows :—
This Invention relates to a simple and durable construction of tap, the body of
which is fitted with a key capable of being turned. A screw pin projecting through
the body into a groove turned in the key, allows said key to turn easily but not to
rise. The bottom of the key is provided with a screwed part projecting therefrom,
which raises or lowers a metal disc or valve (fitted on bottom with a washer) off or on
to the orifice of the valve seat. The outlet is near the level of the bottom of the key,
and is or may be provided with a channel or tube leading to near the top of key so as
to draw off any water which oozes up past said key. To prevent in certain cases
leaking water from spurting upwards, the key is provided at top with a projecting
ridge or cap all round, against which the water may impinge and fall downwards.
Dated this 23rd day of October 1886.
DAVID MASON,
Applicant's Agent.

page_text: I, JOHN MITCHELL formerly of 14 Belgrave Street, Glasgow in the County of Lanark,
but now of Moss Road, Tillicoultry, in the County of Clackmannan, Scotland, Plumber,
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:-
My Invention relates to a simple and durable Tap or valve for controlling fluids or
liquids generally; but specially applicable for drawing off hot or cold water, and also
as a steam blow-off or pet cock; the leading object being to render stuffing therein
unnecessary.
On the accompanying drawings Figures 1, 2, 3 and 5 represent Taps specially
applicable for drawing off liquids; and Figs. 4 and 6 as steam blow-off or pet cocks.
The body or shell a is accurately fitted with a key or plug b capable of being turned;
and kept in place by the cap c which may have a ridge v fitting close on top of key b
as shown at Figs. 5 and 6; or said cap may be dispensed with by using a pin
projecting through shell a into a groove o in key b as shown at Fig. 2. The bottom
of key b screws into a metal valve ƒ as shown at Fig. 1, or has screwed thereinto the
stem of disc or valvef as shown on Figs. 2 5 and 6, said valve f being fitted on
bottom with a leather or other suitable washer, so that as the key is turned the valve f
is raised or lowered, being kept from turning by sliding on one or more guides i on
inside of body a. In lieu of fitting the key 6 and valve f as hereinbefore described
they may be constructed and fitted as shown at Fig. 3. and Fig. 4 wherein the key b
is screwed into shell a and fitted at bottom with a swivelling conical plug; or as shown
at Figs. 3 and 5 a valve f with washer suitable to withstand the action of the liquid
or fluid acting thereon. The outlet k is provided as shown in all Figs. with a channel
or tube leading into the groove o formed round inside of shell a or periphery of key b.
Said groove or channel o may be above or below level of top of tube n provided it is
in free communication therewith by a channel, as at x Fig. 2. As shown at
Figs. 23 & 4 the key b may be fitted with a projecting or overhanging cap ŕ to keep
escaping liquid or fluid off the handle s.
The Tap is operated by turning the handles, thereby raising or lowering the valve
off or on to its seat. Any liquid or fluid which oozes or escapes between the body a
and key b, collects in the groove o and is drawn or drained off by the passage or
tube n.

page_text: my said Invention,
Having now particularly described and ascertained the nature of
and in what manner the same is to be performed I declare that what I claim is.
1st. The construction of Taps as described and shown with reference to the several
Figures on the Drawings annexed hereto.
2nd. In a liquid or fluid draw-off Tap the overhanging cap r constructed and
combined with the key 6 for the purpose described.
3rd. In a liquid or fluid draw-off Tap or valve, the combination of a passage or tube n
with the outlet k substantially as and for the purpose set forth and shown.
Dated this 22nd day of July 1887.
DAVID MASON,
Glasgow,
Applicant's Agent.