Improved Means for Securing Valve Seats in Steam Chests or Casings.
Year: 1893

page_text: Date of Application, 24th Mar., 1893
Complete Specification Left, 22nd Dec., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improved Means for Securing Valve Seats in Steam Chests or
Casings.
I, ALEXANDER TURNBULL of the Firm of A. Turnbull & Co., Engineers,
Bishopbriggs in the County of Lanark, do hereby declare the nature of this
invention to be as follows:-
The object of this invention is to provide simple and effective means for securing
stop and other valve seats in steam chests or casings and for relieving or with-
drawing them for renewal or repair.
Under the invention the valve seat instead of being driven in tight is fitted
loosely in the steam chest or casing and is held therein by means of screw studs,
pins or bolts fitted into holes tapped or screwed in snugs or projections formed on
the flange of the valve seat, the outer ends of said studs, pins or bolts being fitted
to bear against snugs or projections in the steam chest or casing.
The snugs or projections on the valve seat are fitted to clear those on the steam
chest or casing in dropping the valve seat into position, the valve seat being
subsequently turned round to bring both sets of snugs or projections in line, after
which the screwed studs, pins or bolts in the valve seat are turned until their outer
ends bear hard on the snugs on the casing and thus keep the valve seat down in its
place. The valve seat when fitted in place with red lead or similar jointing
material which tends to cause it to adhere to the casing is loosened or withdrawn
for removal when desired by turning the screwed studs, pins or bolts in the opposite
direction so that their screwed ends pass through the screwed holes in the snugs of
the valve seat and by bearing on the casing relieve it from contact or adhesion
thereto.
Datel this 23rd day of March 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improved Means for Securing Valve Seats in Steam Chests or
Casings.
I, ALEXANDER TURNBULL of the Firm of A. Turnbull & Co., Engineers,
Bishopbriggs in the County of Lanark 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 :-
The object of this invention is to provide simple and effective means for securing
stop and other valve seats in steam chests or casings and for relieving or with-
drawing them for renewal or repair.
Under the invention and as illustrated in vertical section at Figure 1 of the
accompanying drawings the valve seat A instead of being driven in tight is fitted
loosely in the steam chest or casing B and is held therein by means of screw studs
pins or bolts C fitted into holes tapped or screwed in snugs or projections a formed
on the flange of the valve seat, the outer ends of said studs, pins or bolts being
fitted to bear against smugs or projections b, in the steam chest or casing B.

page_text: The snugs or projections a on the valve seat are fitted to clear those 6 on the
steam chest or casing in dropping the valve seat into position, the valve seat A
being subsequently turned round to bring both sets of snugs or projections in line
after which the screwed studs pins or bolts C in the valve seat are turned until
their outer ends bear hard on the snugs b on the casing and thus keep the valve
seat down in its place. The valve seat when fitted in place with red lead or
similar jointing material which tends to cause it to adhere to the casing is loosened
or withdrawn for removal when desired by turning the screwed studs pins or bolts C
in the opposite direction so that their screwed ends pass through the screwed holes
in the snugs of the valve seat and by bearing on the casing B relieve it from
contact or adhesion thereto.
In lieu of passing the bolts C through holes screwed in the flange a of the valve
seat A they may be passed through holes screwed in loose suugs a¹ fitted to engage
a collar a² in the valve seat as represented at Figure 2.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The improved means hereinbefore described with reference to the accompanying
drawings for securing valve seats in steam chests or casings.
Dated this 21st day of December 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.