An Improvement in Steam Taps.
Year: 1891

page_text: Date of Application, 13th July, 1891
Complete Specification Left, 13th Apr., 1892-Accepted, 21st May, 1892
PROVISIONAL SPECIFICATION.
An Improvement in Steam Taps.
We WALTER EASTWOOD Brass Founder aud HENRY HYDE, Commercial
Traveller, both. of Britannia Brass Works Ashton-under-Lyne in the County of
Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improvement in the construction of what are known
as "through-way" steam taps wherein the passage of the steam from the inlet to
the outlet is in a straight line through the couical plug, and the object, of the
invention is to prevent the "jamming" of the plug of such taps which sometimes
occurs owing to the plug through which the steam passes expanding more than.the
body of the tap which is exposed to the air.
For the purposes of our invention instead of making the cylinder or cone in
which the plug works of one solid piece with the body of the tap (as hitherto
always practised in making such taps) we cast the body in the form of a shell
leaving a space between it and the inner cylinder or cone in which the plug turns,
and this space is connected with the inlet opening but there is no way through it to
the outlet opening; and the consequence is that as the steam has access to the
space outside the cylinder or cone and between it and the shell as well as passing
straight through the plug, the latter and the coue in which it turns will both be
exposed to the same degree of heat, and will expand equally and thus all danger of
the "jamming" of the tap will be avoided.
Dated this 11th day of July 1891.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improvement in Steam Taps.
We, WALTER EASTWOOD Brass Founder, and HENRY HYDE Commercial
Traveller, both of Britannia Brass Works, Ashton-under-Lyne, in the County of
Lancaster, 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:-
This invention relates to an improvement in the construction of what are known
as "through-way" steam taps wherein the passage of the steam from the inlet to
the outlet is in a straight line through the conical plug, and the object of the
invention is to prevent the jamming of the plug. of such taps which sometimes occurs
owing to the plug through which the steam passes expanding more than the body of
the tap which is exposed to the air.
The nature of our said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the annexed sheet of illustrative drawings and the following explanation
thereof.
Fig. 1 on the drawings is a vertical section, Fig. 2 a horizontal section of a
"through way" steam tap made according to our invention and
Fig. 3 is a vertical section of a modification of the same wherein the position of
the plug is reversed.
'
For the purposes of our invention, instead of making the cylinder or cone a in
which the plug 6 of the tap works of one solid piece with the body c of the tap (as

page_text: hitherto always practised in making "through-way" taps) we cast the body c in the
form of a shell leaving a space d between it and the inner cylinder or cone a in
which the plug & turns and this space is connected with the inlet opening e but
there is no way through it to the outlet opening f; and the consequence is that as
the steam has access to the space d.outside the cylinder or cone a and between it
and the shell c as well as passing straight through the plug the latter and the
cone a in which it turns will both be exposed to the same degree of heat, and will
expand equally, and thus all danger of "jamming" of the tap will be avoided.
It will be observed that in the arrangement shown at Fig. 1 the bottom of the
shell c is made solid and the "square" of the tap by means of which it is turned
is cast to the thick end of the plug, whilst in the modification shown at Fig. 3 the
position of the plug 6 is reversed and the shell c is bored through both at top and
bottom, the "square" being cast on the small end of the plug.
It will be evident that these taps may also be used with advantage for hot water
or other hot liquid.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is —
The combination with a plug tap having a straight "through-way," of a space or
cavity between the cylinder or cone in which the plug turns and the shell or body
of the tap, such space or cavity being in connection with the inlet opening only of
the tap and having no connection with the outlet opening thereof, wheroby the
expansion of the plug and its conical or cylindrical seating will be equalized and all
jamming" prevented substantially as hereinbefore described.
66
Dated this 12th dex of Anril 1899-
GEO. DAVIES & SON,.
4, St. Ann's Square, Manchester, Agents for the Applicants.