Improved Screwed Stays and Rivets for Steam-boilers.
Year: 1888

page_text: Date of Application, 1st Nov., 1888
Complete Specification Left, 1st Aug., 1339-Accepted, 7th Sept., 1989
PROVISIONAL SPECIFICATION.
Improved Screwed Stays and Rivets for Steam-boilers.
I, JOHN CHARLES WILSON, of 24 Lincoln's Inn Fields, London, in the County of
Middlesex, Mechanical and Consulting Engineer, do hereby declare the nature of my
said invention to be as follows:
This invention relates to the screwed stays of steam-boilers, which are generally
placed between the firebox and the firebox shell, being made out of solid rods of
iron or copper, screwed into the plates, and the ends riveted over. The objection to
these stays is this, that very much of their strength depends upon the riveting, and
when the heads inside the firebox get burnt off, the stays begin to leak, and ultimately
the screw threads are stripped off, and the stays are drawn through the plate.
My invention, intended to remedy that defect, consists of the following. Instead
of making my stays out of solid rods, I make them hollow-preferably out of rolled
tubes, I screw them into the plates as usual, but I have no heads upon them, I fasten
them by means of conical pins which I drive or press into the hollow parts at each
end of the stay, thus compressing the threads on the stay tight into the threads on
the plates, and I then lay over the ends of the stay very much the same as tubes are
laid over.
No heads are left to be burned off, and the cost of riveting is savod. Tho
stays according to my invention are also lighter than the old solid stays, as the metal
required to form the heads is saved.
In order that when a stay gets broken it should be discovered, I make the
fastening pins at the firebox shell (or outer) end hollow, so that the water & steam
which would be then emitted from the boiler shows the broken stay.
My invention also consists of rivets made and fastened in the same way.
In the cases of both stays and rivets, I sometimes make them with a diaphragm in
the middle, that is, the hollow part is not taken completely through them.
JOHN C. WILSON.
COMPLETE SPECIFICATION.
Improved Screwed Stays and Rivets for Steam-bollers.
I, JOHN CHARLES WILSON, of 24 Lincoln's Inn Fields, London, in the County of
Middlesex, Mechanical and Consulting Engineer, do hereby declare the nature of
my said invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The
My Invention relates to the screwed stays of Steam-Boilers, which are inserted
into the firebox and the firebox-shell, and have hitherto been made out of solid rods
of iron or copper, screwed into the plates, and the ends then riveted over.
objection to these stays is this, that very much of their strength depends upon the
riveting, and when the heads inside the firebox get burnt off, the stays begin to leak,
and ultimately the screw threads are stripped off and the stays are drawn through
the plate.
My Invention, which remedies that defect, consists of the following:-Instead of
making the stays out of solid rods, I make them hollow, preferably out of rolled
tubes, screw them into the plates as usual, but I have no heads upon them, I fasten
them by means of slightly tapered metal plugs which I drive or press into the hollow
ends of each stay, thus compressing the threads on the stay tight into the threads
on the Plates, and I then lay over the ends of the stay very much the same as tubes
are laid over, no heads are left to be burned off, and the cost of riveting is saved.
The stays according to my Invention are lighter than the old solid stays, as the metal
required to form the heads is saved.

page_text: In order that when a stay gets broken it should be discovered, I make the
fastening-plug at the firebox shell (or outer) end hollow, so that the water and steam
which would then be emitted from the Boiler would show the broken stay.
My Invention also consists of rivets made and fastened in the same way.
In the cases of both stays and rivets, I sometimes make them with a diaphragm
in the middle, that is, the hollow part is not taken completely through them.
Fig. 1 represents a longitudinal section and Fig. 2 a cross section of one of my
hollow stays, the diaphragm which I sometimes leave in them being represented by
the dotted lines A. Fig. 3 represents a longitudinal and Fig. 4 a cross section of
one of my hollow rivets."
Having now described the nature of my Invention and in what manner the
same is to be performed, I claim,—
The construction of hollow screwed stays and rivets for steam-boilers fastened by
means of metal plugs driven or pressed into each end, substantially as herein described
and illustrated.
In witness whereof, I, the said John Charlos Wilson, have hereunto set my
hand and seal this Thirty first day of July, in the year of our Lord One
thousand eight hundred and eighty nino.
TOUN
BULL SON
HN C. WILSON
JOHN