IMPROVEMENTS IN EXPANSIVE VESSELS OF STEAM TRAPS
Year: 1887

page_text: Date of Application, 27th Aug., 1837
Complete Left, 23rd May, 1888
Complete Accepted, 6th July, 1388
| AARON BRADSHAW Griffin Works Willows Lane Accrington Lancashire
Engineer and Brass founder do hereby declare the nature of my invention for
IMPROVEMENTS IN EXPANSIVE VESSELS OF STEAM TRAPS to be as follows:-
-
The object of this my invention is to so construct the "Expansive vessels" of steam
traps that they may be easily and cheaply repaired when such "expansive vessels "
have become damaged. And these improvements especially relate to the "Adjustable
Expansive Vessel" set forth and described in a patent for "improvements in steam
traps Dated June 13th 1873 No. 2097 and granted to Joshua Kidd and are as
follows, viz. :-
I construct a ring of brass or other suitable metal and upon the outer surface of the
said ring I chase a screw thread and I make each end of the said ring perfectly flat
and at right angles with the outside of ring. The internal diameter of said ring 1
make of a size suitable to the size of inlet pipe of steam trap and so that the sides of
the ring may be of the necessary thickness. Upon each end of the said ring I fit a
ring nut each nut having a lip inside; the inside diameter of the said lip or lips I
make slightly larger than inside Diameter of ring upon which the said nut is fitted
and I make the inner surface of lips of nuts aforesaid perfectly true and flat so that
when they are screwed upon the aforesaid ring the said lips of nuts will bed and fit
perfectly against the ends of the said ring.
To transform the aforesaid ring into a vessel capable of holding and retaining
alcohol or other easily evaporated liquid I place a metal diaphragm of suitable form
and strength on each end of the said ring and I then screw on the aforesaid nuts the
lips of which press the metal diaphragmns aforesaid against the ends of the ring and
make perfectly tight joints.
Expansive vessels
when constructed as described in the aforesaid patent are
liable to become damaged from two causes viz. (1) steam of high pressure will soften

page_text: and cut away the solder which seals the joint in "Expansive vessel" and the volatile
liquid it contains instantly evaporates.
scores
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(2) Steam of High pressure acting on the flat end of "Expansive vessel" "
and cuts away the metal and thus destroys the smooth surface necessary to prevent
the
escape of steam. On the occurance of either of the aforesaid defects the
expansive vessel" requires renewing because from the nature of its construction the
said Expansive Vessel cannot be repaired its renewal is often inconvenient and allways
costly.
<
By my improved method of constructing "Expansive Vessels" the use of solder is
not necessary and a new end may be fitted to Expansive Vessel at a small cost in
money and time.

page_text: Improvements in Expansive Vessels of Steam Traps.
1, AARON BRADSHAW Griffin Works, Willows Lane Accrington, Lancashire
Engineer and Brass founder 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, aided by the annexed drawing :-
--
The object of my invention is to so construct the Expansive vessels of steam traps
that they may be easily and cheaply repaired when such expansive vessels have become
damaged and these improvements especially relate to the adjustable expansion vessel
set forth and described in a patent for improvements in steam traps dated June 13th
1873 No. 2097 and granted to Joshua Kidd.
Expansive vessels when constructed as described in the aforesaid patent are liable to
become damaged from two causes viz.
1.—Steam of high pressure will soften and cut away the solder which seals the joint
in expansive vessel and the volatile liquid it contains instantly evaporates.
2. Steam of high pressure acting on the flat end of expansive vessel scores and cuts
away the metal and thus destroys the smooth surface necessary to prevent the escape
of steam on the occurance of either of the aforesaid defects the expansive vessel
requires renewing because from the nature of its construction the said expansive
vessel cannot be repaired its renewal is often inconvenient and always costly.
By my improved method of constructing expansive vessels the use of solder is not
necessary and a new end may be fitted to expansive vessel at a small cost in money
and time. My improvements are as follows, viz.-I construct a ring of brass or
other suitable metal and upon the outer surface of the said ring I chase a screw thread
and I make each end of the said ring perfectly flat and at right angles with the outside
of ring the internal diameter of said ring I make of a size suitable to the size of inlet
pipe of steam trap and so that the sides of ring may be of the necessary thickness,
upon each end of the said ring I fit a ring nut each nut having a lip inside, the inside
diameter of the said lip or lips I make slightly larger than inside diameter of ring
upon which the said nut is fitted and I make the inner surface of lips of nuts aforesaid
perfectly true and flat so that when they are screwed upon the aforesaid ring the said
lips of nuts will bed and fit perfectly against the ends of the said ring.
To transform the said ring into a vessel capable of holding and retaining alcohol or
other easily evaporated liquid I place a metal diaphragm of suitable form and strength
on each end of the said ring and then I screw on the aforesaid nuts the lips of which
press the metal diaphragms aforesaid against the ends of the ring and make perfectly
tight joints.

page_text: That the construction of these expansive vessels may be clearly understood I will
now proceed to describe the drawing herewith which drawing shows an expansive
vessel full size in section A, A, is the ring having a thread on its outside surface
BBB B, are the two ring nuts having lips bearing on ends of ring A C. C. are the
diaphragms which are pressed against ends of ring A when nuts B are screwed home.
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
The combination of the ring AA the ring nuts BB BB and the seperate diaphragms
C. C. as illustrated and for the purpose herein described.