IMPROVED FLEXIBLE STAY FOR USE IN STAYING THE FIRE BOXES OF LOCOMOTIVE, MARINE, PORTABLE AND STATIONARY BOILERS
Year: 1885

page_text: COMPLETE
SPECIFICATION,
WILLIAM LEACH Foreman Boiler Maker of the Rajputana Malwa Railway,
Ajmere East India, do hereby declare the nature of my invention for IMPROVED
FLEXIBLE STAY FOR USE IN STAYING THE FIRE BOXES OF LOCOMOTIVE, MARINE,
PORTABLE AND STATIONARY BOILERS and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
On reference to the Drawings it will be seen that the Flexible Stay A Fig 1, is
shown full size. The reduced scale drawings Figs 3 and 4 show the flexible stay A
as fixed in two different types of Locomotive Boiler Fire Boxes.
Fig 1 shows the manner in which the flexible stay is fitted to the outer shell of
the Boiler, and to the top of the copper fire box.
•
The stay is made with a round or swivel head a', which fits into the copper
Beating b. which also fits into the bush C, which is screwed into the outer shell
plate C of the Boiler as set forth and shown on the drawing.
The bottom end of the stay A passes through a plain hole drilled in the top of
the fire box C¹¹.
The nuts d and d' which fit on the bottom of the stay A, are each fitted with a .
vee shaped ring e, which is turned out of the solid..
In fixing the Flexible Stay in position the bottom
against the under side of the top of the fire box until
stay has taken a firm. bearing on the copper seating b.
screwed down firmly onto the top side of the fire box.
nut d¹ is first screwed up
the rounded head of the
The top nut d is then
The bottom nut dis afterwards screwed up tight against the underside of the
fire box top. The vee shaped rings on the nuts d and d, cut their way into the
plate and thus make a steam tight joint, and also secures the end of the stay to
the top of the Fire Box.
After the flexible stay is fixed the bush C is then fitted with the brass plug f.
which has cut thereon a taper thread as shown on the drawing.
The plug falso is fitted with a square hole f¹ for the purpose of receiving the
end of a wrench by which the plug f is screwed up.

page_text: The object of the plug ƒ is to prevent escape of any steam which may blow out
between the copper seating b and the head of the flexible stay A. in the crown arch
stay plate h. The edge of the cup is made to suit the curve of the crown arch
stay plate as shown on drawing.
.
Fig 6 shows the short flexible stay through the water spaces, and is the same
arrangement as shown in Fig 2.
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
First, The octagonal shaped bush C, and the manner the same is constructed and
attached to the outer shell plate.
Second, The copper conical seating also the manner in which it is placed
between the head a¹ of the flexible stay A and the conical seating of the bush C,
and also the purpose for which the copper seating is intended, namely to prevent
corrosion and friction, thus securing a free action of the flexible stay.
Third, The simple construction of the flexible stay complete with nuts and the
mode of securing the end of the flexible stay to the top of the fire box, after passing
it through the plain hole in the top of the fire box.
Fourth, The general arrangement of the flexible stay as shown and described in
the specification and on the Drawings.