CURING DEFECTIVE AND SMOKY HOUSE CHIMNEYS
Year: 1885

page_text: JOHN COCHRANE, Jun' Ironmonger 77 & 78 Kirkgate Leith do hereby declare
the nature of my invention for CURING DEFECTIVE AND SMOKY HOUSE CHIMNEYS
to be as follows:-
The disperser is made on an entirely new principle the ordinary plan being to
solder the sheet iron together while in this invention it is free from solder being
riveted throughout and thoroughly fireproof, It also possesses increased wind
bearance which enables it to revolve at greater rapidity, By the improved construc-
tion of the spindle socket the friction is reduced to a minimum which renders it
silent in action, An improvement is further made in the shape of a self-locking
lubricator which avoids the necessity of putting ones hand into the interior of the
disperser generally a matter of great trouble and annoyance.
The increased wind bearance of the Improved Smoke Cowl is obtained by
keeping the blades of sufficent size to allow of there being reversed back to an
angle of exposure to the wind as shown at "A" in drawing.
The spindle socket and lubricator is cast in one piece of brass the socket being
fitted at the bottom with a steel centre for the spindle to revolve upon as shown
at "B" while the cup is 21" diameter with a small snug cast on the side to act as a
lock for the spindle which is furnished with an iron plate to fit inside of lubri-
cating cup with a slit cut in the plate to allow of its passing down clear of the
snug as shown at "C."
In being furnished with the above described lubricator the cowl has simply to
have the spindle entered into the socket into which it will descend till the iron
plate comes to rest on the snug and then be turned round in the direction the wind
turns it and it will then lock itself securely When occasion arises necessitating
the cleaning of the chimney the top part has simply to be raised slightly upwards
and by turning it round in the opposite direction it will be at once unlocked.
Doted this the 00:1 1
100

page_text: Chimneys:
JOHN COCHRANE Jun Ironmonger 77 & 78 Kirkgate Leith I do hereby declare
the nature of my invention for CURING SMOKY AND DEFECTIVE CHIMNEYS and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The cowl which is of the revolving kind is made of strong galvanized iron being
rivitted throughout and thoroughly fireproof From the improved construction of
the blades it posseses great wind bearance which enables it to revolve at great rapidity
which is further assisted by the improved construction of the spindle socket
⚫ reducing the friction of the spindle to a minimum.
An improvement is further made in the shape of a self locking lubricator which
avoids the necessity of putting ones hand into the interior of the cowl to lock and
unlock it often a matter of trouble and annoyance.
The increased wind bearance is obtained by keeping the blades of sufficent size
to allow of there being reversed back at the top to an angle shown at "A" in
drawing sent with provisional specification.
The spindle socket and lubricator is cast in one piece of brass being fitted at the
bottom with a steel centre for the spindle to revolve on while the lubricator is a
round cup of 24" dia with a small snug cast on the inside at top of cup to act as a
lock to the spindle which is furnished with an iron plate screwed on to spindle
and secured with jam nut the plate fitting inside of lubricator with a notch cut
on the plate to allow of its passing down past the snug as shown at "B" in
drawing.
In being furnished with the above described lubricator the cowl has simply to
have the spindle entered into its socket into which it will descend till it comes to
rest on the snug and then be turned round in the direction the wind turns it and
will immediately be securely locked, when occasion arises necessetiting the cleaning
or oiling of the cowl the top part has simply to be raised slightly upwards and by
turning it round the opposite direction it will at once unlock itself.
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
1st The great value in having the tops of the blades reversed back.
2nd The spindle socket being fitted with a steel centre being durable and
facilitating the rapidity of its revolutions.
3rd The spindle socket being cast with collar at top and bottom reduces the
friction to a minimum.
4th That the self locking lubricator is an improvement which adds much
importance to the value of the cowl.
Dated this the 3rd day of August 1886.