Improvements in Stays for Steam and other Boilers.
Year: 1896

page_text: Date of Application, 19th May, 1896
Complete Specification Left, 19th Feb., 1897-Accepted. 10th Apr.. 1897
PROVISIONAL SPECIFICATION.
Improvements in Stays for Steam and other Boilers.
We, REUBEN THOMAS PRESTON of the Firm of J. Stone & Co. of Deptford in
the County of Kent, Engineers, and JAMES HOLDEN of Hermon House, Wanstead
in the County of Essex Gentleman do hereby declare the nature of this invention to
be as follows:-
In the specification of our Patent No. 15,547, dated 15th August 1894 we have
described stays which in the portion intermediate between the end parts (which
latter are adapted for fixing in the plates to be stayed together) are provided with
recesses which divide the stay up into sections or provided with through slots which
divide it up into entirely separate parts for the purpose of giving flexibility to the
stay, resisting the racking or bending strain caused by unequal and varying
expansion and contraction of the plates and preventing the formation of grooves in
the plates.
Now in order to counteract any tendency for the said recesses or slots to be
clogged with deposit of sufficient hardness to impair the flexibility of the stay we
fill or close the recesses or slots with suitable plastic material or composition. Or
we cover the recessed or slotted part of the stay with a sleeve or other device of
metal or other suitable material.
Instead of making the stays of the aforesaid, recessed or slotted form we may
make them in the part between the stayed surfaces of an undulating or extended
form and either solid or hollow and we prefer to fill or cover the recessed portions
in the manner. described.
In one form of solid stay we make it of a helical or twisted form the section of
this part being by preference of a flat rectangular form with rounded corners. In
one form of hollow stay we make it with annular extensions at intervals or we make
them helical.
improvements in Stays for
We, REUBEN THOMAS PRESTON of the Firm of J. Stone & Co. of Deptford
in the County of Kent Engineers, and JAMES HOLDEN of Hermon House,
Wanstead in the County of Essex Gentleman, 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 :-
In the specification of our Patent No. 15,547 dated 15th August 1894 we have
described stays which in the portion intermediate between the end parts (which
latter are adapted for fixing in the plates to be stayed together) are provided with

page_text: recesses which divide the stay up into sections, or provided with through slots
which divide it up into entirely separate parts, for the purpose of giving flexibility
to the stay, and thus resisting the racking or bending strain caused by unequal and
varying expansion and contraction of the plates, and for preventing the formation
of grooves in the plates.
Now in order to counteract any tendency for the said recesses or slots to be
clogged with deposit of sufficient hardness to impair the flexibility of the stay we
fill or close the recesses or slots with suitable plastic material or composition. Or
we cover the recessed or slotted part of the stay with a sleeve or other device of
metal or other suitable material.
Fig. 1 is an elevation and Fig. 2 a central cross section of one of the said stays
formed with recesses A, which are covered by means of a sleeve C which may be
of rubber or other elastic material, or of sheet metal in the form of a strip wrapped
round the stay.
Figs. 3 and 4 are similar views of a stay screwed in its middle portion of one
diameter with one end portion.
Instead of making the stays of the aforesaid recessed or slotted form we may
make them in the part between the stayed surfaces of an undulating or extended
form and either solid or hollow, and we prefer to fill or cover the reduced portions in
the manner described.
In one form of solid stay we make it with annular extensions or dwellings, as
shown at B Figs. 5 and 6. Figs. 7 and 8 show a similar form but with a straight
central hole through it. Figs. 9 and 10 show a similar form but having a central
hole following the outer contour of the middle portion of the stay.
Fig. 11 shows a helical or twisted form the section of this part being by preference
of a flat rectangular form with rounded corners as shown in Fig. 12 which is a
section on line A. B.
Fig. 13 shows a similar form but with a hole through which to some extent
follows the outer contour; Fig. 14 is a section on line A. B.
In Fig. 15 is shown a stay first formed with a straight round hole through and
then compressed and reduced in diameter gradually towards the middle, where the
hole disappears; Figs. 16 and 17 are sections on lines A. B. and C. D.
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.
1. In stays of the character described and referred to the filling of the recesses
or slots with suitable plastic material or composition for the purpose of preventing
the deposit of any calcareous or other matter therein whereby the flexibility of
the stay might be impaired.
2. In stays of the character described and referred to the covering of the
recesses or slots with a sleeve or other device for the purpose of preventing the
deposit of any calcareous or other matter therein whereby the flexibility of the stay
might be impaired.
3. Making boiler stays in the part between the plates to be stayed of au
undulating.or extended form and either solid or hollow substantially as described
with reference to Figs. 5 to 17.
Dated this Nineteenth day of February 1897.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.