Improvements in Chimney Tops or Ventilating Terminals.
Year: 1895

page_text: Date of Application, 19th Nov., 1895-Accepted, 21st Dec., 1895
COMPLETE SPECIFICATION.
Improvements in Chimney Tops or Ventilating Terminals.
I, RICHARD MARSTON, of 106 Price Street, Birkenhead in the County of
Chester, Brazier, 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 :-
This invention has for its object a chimney top or ventilating terminal which
shall discharge smoke or air into the atmosphere without the wind being able to
blow down it, and in which the wind is made an accessory in educting the smoke
and other volatile products of combustion. It is so designed that in the case of
chimneys, it can easily be swept or cleaned with ordinary brushes, there being no
obstruction which will prevent the passage of the brushes, a very desirable thing
in all chimney cleaning as it thereby ensures efficient cleaning.
My invention will be understood from the following description, reference being
had to the accompanying drawings, in which,
Figure 1 is a sectional elevation of my improved chimney top or cowl;
Figure 2, a plan, and
Figure 3, a front elevation of the same.
In these figures, A is the flue or shaft delivering the smoke directly upwards,
B a revolving cowl or hood, open at one side b to eject the smoke and having
wings B' at top and sides of opening b, C a projecting wind vane for revolving the
hood, Dan shaped bridge piece or bracket rivetted to the shaft A, E a footstep
secured to the bracket D and having a tube F above, G a diaphragm supported
in hood B, H an oil reservoir which may be screwed or otherwise fitted to the
tube F, I a pivot secured to the hood B by a nut and adapted to support the said
hood in the footstep, at the same time allowing it to easily revolve with the wind,
a hole admitting oil from the reservoir into the tube F, ' a screw cap for filling
the reservoir with oil, J a hole in the hood above, K a small tube or chimney for
ventilating the chamber L above the diaphragm and oil box, M a counterweight
for counterbalancing the opposing weight of the vane and wings C and B¹ and
keeping the hood plumb. The wind cannot blow down the shaft A as it is stopped
above by the hood B and wings B', the vane causing the hood to rotate and
keeping the orifice on the side opposite to the direction from which the wind is
blowing.
The mode of action is as follows:-
The smoke passing up the flue A impinges against the under side of the
diaphragm G, and then is discharged through the orifice b, the wind assisting in
educting the smoke. The bracket D being bent as shown, there is a passage clear
of all obstruction light up the flue A to the diaphragm G, so that the flue and the
hood can be cleaned with the ordinary brushes right up to the top, a very desirable
thing in all chimney cleaning. To lubricate the hood all that is necessary is to
rotate the hood so that the hole J will come immediately above the screw cap h
in the reservoir. When this is done, the cap is exposed through the hole Jand
can then be unscrewed and the reservoir filled with oil sufficient to last for a long
period. The oil flows from the reservoir into the tube F, where it comes directly
in contact with the pivot and keeps the same automatically lubricated. Any fumes
vapourised by the heating of the oil will escape through the small tube or
chimney K, and moreover, the heat passing up the shaft and the heat o. the
ironwork will prevent the oil getting frozen or solidified during frost.

page_text: The top portion of the hood B may if desired be made removable so that it can
be lifted off the lower part by unscrewing nuts, thus giving access to the oil
chamber H in case of necessity.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is-
1. The improvement in wind rotated chimney tops or ventilating terminals,
which consists in arranging the pivot or centre on which the cowl or hond revolves
near the top of the cowl or hood and some little distance above the top of the
chimney flue, whereby there is formed a passage clear of all obstructions up to the
top or nearly to the top of the hood, a very desirable thing in all chimney cleaning,
substantially as described.
2. In a wind rotated chimney top or ventilating terminal, the combination
therewith of a -shaped bridge, bracket or equivalent secured at bottom to the
top of the chimney flue and at top forming a support for the pivot or centre on
which the hood revolves, substantially as and for the
purpose described.
3. In wind-rotated chimney tops or ventilating terminals, the device substantially
as set forth for automatically lubricating the centre or pivot on which the cowl or
hood rotates.
4. The general combined arrangement or construction of parts forming my
improved chimney top or ventilating terminal substantially as described and
illustrated on the accompanying drawings.
Dated this 18th day of November 1895.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.