A IMPROVED APPARATUS FOR RAISING AND LOWERING ENGINE CHIMNEYS
Year: 1884

page_text: THOMAS WILLIAM AIREY South Parade Gainsborough in the County of Lincoln
Mechanic do hereby declare the nature of my invention for A IMPROVED APPARATUS
FOR RAISING AND LOWERING ENGINE CHIMNEYS, to be as follows:-
Drawing No 1, consists of a bracket, bolted on the top of the front of the
smoke box, through the bracket (A), revolves a fixed screw rod (B), which screw
rod passes through a pin (C) in slot of crank and by turning the screw rod
handle (D), the screw rod when revolving raises and lowers the slot crank (E),
which is connected to a fork link (F), and the motion parts above referred to, move
in brackets (G), and (H), on the back of chimney and base, This improved
invention for Raising and Lowering Chimneys is worked by a hand screw inotion
by the side of chimney from front of smoke box of engine.
Drawing No 2 is much the same idea as the Drawing No 1, It consists of a
bracket bolted on the top of the front of the smoke box, through the bracket (A),
revolves a fixed screw rod (B), which screw rod passes through a stay pin (C),
and by turning the screw rod handle (D), the screw rod when revolving raises and
lowers the side slot cranks (E), which are connected to side links (F), and the
motion parts above referred to, move on centres pins (G) and (H), both sides of
chimney & base.
c

page_text: '
COMPLETE SPECIFICATION.
THOMAS WILLIAM AIREY, South Parade Gainsboro in the county of Lincoln,
mechanic do hereby declare the nature of my invention for RAISING AND
LOWERING ENGINE CHIMNEYS 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 raise and lower engine chimneys and in such
a manner as to minimise the liability to accident caused by the present modo of
raising and lowering chimneys by hand, to firmly fix the chimney when in its
recumbant position, preventing it from jolting or rocking about, and to firmly fix
the chimney when in its upright or working position, thus avoiding. the use of
bolts now used in the flanges of chimneys for their security.
To effect these objects by means of a screw, working through a bracket attached
to the smoke box, and fitted with an handle, a slot crank movable on a pin, in a
bracket bolted or rivetted on chimney base, a screw pin free to move on slot of
crank, and connecting one end of slot crank with screw, and a lifting link attached
to the other end of slot crank and connected to a bracket bolted or rivetted on
chimneys.
In Fig I B is the screw working through the bracket A the said bracket being
either bolted or rivetted in a suitable position on smoke box, D the handle fitted to
end of screw,
E the slot crank movable on a pin in the bracket H the said bracket
either bolted or rivetted on chimney base, C the screw pin free to move in slot of
said crank and connecting one end of slot crank E with the screw B. F the lifting
link attached to the other end of slot crank and connected to the bracket G the
said bracket being either bolted or rivetted on chimney.
I should prefer where practicable to have the brackets G and H on chimney and
base respectively cast in conjunction with joint ring, the said brackets to be at the
back or joint side.
Fig II is a similar arrangement B is the screw working through the bracket A,
the said bracket being either bolted or rivetted in a suitable position on smoke
box D the handle fitted to the end of screw, E the slot cranks movable on centre
side pins H the said centre side pins, either bolted or rivetted on chimney base,
C the screw pin or stay, free to move in slots of said cranks, and connecting one
end of slot cranks E with the screw B, F the lifting links attached to the other
end of slot cranks and connected to the centre side pins G, the said centre side
pins being either bolted or rivetted on chimney.
The action of the complete apparatus is as follows. By turning the handle D
the screw B threads its way through the screw pin C forcing the slot cranks E
backward or forward and thus causing the lifting links F attached to end of slot
cranks to raise or lower the chimney at the will of the operator.
Thus it will be seen that the chimney when in its recumbant or upright position
will be firmly fixed by means of the screw B.
Having now described the nature of my said invention and in what manner the
same is to be performed I wish it to be understood, that I do not limit myself to

page_text: the precise details herein described and illustrated as the same may be varied
without departing from the nature of my invention, but I claim as my invention
of Improved apparatus for Raising and Lowering engine chimneys.
I. The combination of the screw, screw pin, slot cranks and lifting links (shown
in Figs I and II) in the manner and for the purpose set forth.
II. The general, construction of the brackets G and H (shewn in Fig I)
substantially as described and illustrated and for the purposes set forth.
IIL The method of raising and lowering engine chimneys by means of a screw,
and lifting link arrangement.
In witness whereof, I the said Thomas William Airey have hereunto set my
band and seal this 25th day of April in the year of our Lord One thousand
eight hundred and eighty five.
THOMAS WILLIAM AIREY.