Year: 1887

page_text: Date of Application, 3rd Feb., 1887.
Complete Left, 28th Apr., 1887.
Complete Accepted, 31st May, 1887.
I, ALLAN FULLARTON BAIRD of 147 St. Vincent Street, Glasgow, in the County
of Lanark, North Britain, Writer do hereby declare the nature of this invention to be
as follows:-
This Invention, which relates to improvements in stop cocks, has for its object to
provide a stop cock wherein the tendency to leakage through wear is overcome.
The Invention consists in constructing the plug with an inclined passage therein in
place of a straight passage therethrough as hitherto. The casing of the cock in which
the plug works is constructed with entering and discharge passages on opposite sides
thereof and whose distance apart or difference of level corresponds with the upper and
lower parts of the inclined passage in the plug. The plug may be formed with one,
two or more such inclined passages communicating with one, two or more discharge
openings and one of the discharge openings may be made in the plug itself.
Dated this 2nd day of February 1887
J. H. JOHNSON, DAY & JOHNSON,
115, St. Vincent Street, Glasgow,
Petitioner's Agents.

page_text: I, ALLAN FULLARTON BAIRD of 147 St. Vincent Street, Glasgow, in the County
of Lanark, North Britain, Writer 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, which relates to improvements in stop-cocks, has for its object to
provide a stop-cock wherein the tendency to leakage through wear is overcome.
Much trouble has heretofore been experienced in providing a thoroughly tight stop-
cock, as in grinding the plug more or less emery and oil collects in the mouth of the
passage therein, which by constant manipulation of the plugs wears in the’plug seat,
in the same horizontal plane, with the inlet and outlet apertures, an annular groove
resulting in leakage.
The present Invention consists in constructing the plug with an inclined passage in
place of a straight passage therethrough as hitherto. The casing of the cock in which
the plug works is constructed with entering and discharge passages on opposite sides
thereof and whose distance apart or difference of level corresponds with the upper and
lower parts of the inclined passage in the plug.
In order that my Invention may be properly understood and readily carried into
effect, I will now proceed to describe the drawings hereunto annexed.
Figure 1, is a central vertical section of a stopcock constructed in accordance with
my said Invention.
Figures 2 and 3 are similar sections of modifications of the same.
The plug A, is formed with an inclined passage a, extending through the same form
side to side and the casing B, is formed with the inlet and outlet apertures b, 61, at
different levels to correspond with the incline of the passage a, so that when the plug
is seated in its casing B, the inclined plug passage a, will connect the inlet with the
outlet aperture. Thus while the oil and emery may collect as heretofore in the
extremities of the plug passage and an annular groove may be cut thereby in the plug
seat, I produce two independent grooves, instead of one as heretofore, which, having
no connection, do not result, as in the old style of stop-cock, in producing such wear
as to constitute a leak, by this means it will be seen that a tight and effective stop-
cock is obtained.
In Figure 2, a modification is shewn in which the plug A¹, is provided with two
inclined passages a¹, a², the casing being provided with two apertures 62, 63, upon one
side and one aperture 6, upon the opposite side whereby communication to the
aperture or outlet 4, may be had from either the upper pipe 62, or lower pipe 63.
In Figure 3, a modification is shewn in which the casing B2, is provided with a
single arrangement of inlet and outlet apertures 65, 66, the plug A², being formed with
an inclined passage a³, and in addition to said passage, a second inclined passage at,
is provided which extends upon a similar incline to the centre of the plug, and leads
therefrom through the centre of the plug to the extremity a³, thereof, the said

page_text: extremity extending out from the casing B², thus providing an outlet through the
bottom or extremity of the plug in addition to the usual side outlet and either of
which may be placed in connection with the inlet as desired.
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 what I claim is :-
1. The stop cock having its plug provided with an inclined passage and the casing
with inlet and outlet apertures correspondingly arranged, substantially as and for the
purposes hereinbefore described and shewn in Figure 1, of the accompanying
drawings.
2. The stop-cock having its plug provided with two or more inclined passages and
the casing with inlet and outlet apertures correspondingly arranged substantially
as and for the purposes hereinbefore described and shewn in Figure 2, of the
accompanying drawings.
3. The stop-cock having its plug provided with two or more inclined passages, one
or more of the said passages being led centrally through the said plug substantially
as and for the purposes hereinbefore described and shewn in Figure 3, of the
accompanying drawings.