Year: 1895

page_text: I THOMAS HUNGATE PRESTON DENNIS, Chelmsford Essex Engineer do hereby
declare the nature of this invention to be as follows:-
The improvements are in the smoke pipe elbows dampers and fittings for closed
stoves and specially applicable to my patent stove No. 3310 dated 9th March 1886,
and are as follows:
In the place of the ordinary smoke pipe nozzle I first form a flange directly on
to the dome on top of the stove in a convenient position. I make this flange at an
angle of 30 degrees or thereabouts with screwed studs cast in it with which to
attach the elbow or pipe that may be fitted thereto. I also form two bottom
friction bearings in this flange to receive two friction axles which I make on the
spindle of the damper.
The smoke pipe elbow is made with flanges on each end, the under one of which
corresponds with angle of outtake flange of stove; the other or top outtake flange
18 then horizontally placed to receive a vertical smoke pipe.
Upon the elbow being reversed, side for side on the outtake flange of stove its
upper outtake flange is changed from the horizontal to a slight incline from
the vertical line to receive a smoke pipe when it is desired to carry it in this
direction.
I form two top friction bearings (to correspond with the two bottom friction
bearings in the outtake flange of stove) in the under flanged angle of the elbow so
that upon the elbow being placed on the outtake flange of stove in either position
described above two circular friction bearings are formed to receive the two
friction axles which are made on the spindle of damper and on which the damper
revolves and by means of these friction bearings it can be adjusted and will remain
in any desired position.
The damper is made with two friction axles on its spindle to correspond in size
and to fit into the two circular friction bearings which are formed when the elbow
is connected on to the outtake flange of stove as described above.
For the proper adjustment of the damper I form a stop on each end of the top
friction bearing and upon the right bottom friction bearing I also form a stop; the
space between these stops is equal to one quarter of the entire circumference of
the friction bearings. Upon the right friction axle of damper 1 fit a projecting
indicator which limits the turn or movement of the damper 'twixt the two stops
described to the quarter of an entire revolution.
In one extreme position the damper is entirely closed across the smoke pipe area
and in the other extreme position it is fully open. The exact position of the
damper within the smoke pipe elbow at or between the two stops described above
is always shown by the projecting indicator on the right hand friction axle of the
damper.
In some cases I form the before described top bearings at one end of a straight
outtake flanged pipe and in which the damper axles work as in the bearings of
elbow which are formed when it is fitted on to the outtake flange of stove as herein
before described.

page_text: Հայ-ԵԵՈՏ II OLU- ԻՆՆԵ.
I, THOMAS HUNGATE PRESTON DENNIS, Chelmsford Essex Engineer, 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 :-
The improvements are in the form and ready adaptation of certain stove smoke
pipes, their elbows, dampers, and fittings, for use with closed stoves and are
specially applicable and necessary to the perfect performance of my stoves
Patent No. 3310 dated 9th March 1886 and are as follows.
In place of the ordinary smoke pipe nozzle, I first form a flange directly on to
the dome or top of stove in a convenient position.
I make this flange at an angle of 30 degrees or thereabouts preferably with
screwed studs cast in it with which to attach a flanged pipe or elbow that may be
fitted thereto.
I form two bottom friction bearings in this flange to receive two friction axles
which I make on the spindle of the damper.
The smoke pipe elbow which fits immediately on to smoke pipe nozzle of stove
is made with flanges on each end, the under one of which corresponds with the
angle of outtake flange of stove; the other or top outtake flange of elbow is
horizontal when placed upon the angular outtake flange of stove and thus fixed is
adapted to receive a flanged smoke pipe in a vertical position.
Upon the elbow being reversed side for side on the outtake flange of stove its
upper outtake flange changed from the horizontal to a slight incline from the
vertical line and is adapted to receive a flanged smoke pipe when it is desired to
carry it in this direction.
I form two top friction bearings (to correspond with the two bottom friction
bearings in the outtake flange of stove) in the under flanged angle of this elbow,
so that when it is placed on the out-take flange of stove in either position described
above two circular friction bearings are formed to receive two friction axles which
are made on the spindle of damper hereafter described and in which the damper
revolves, and by means of these friction bearings the damper can be adjusted and
will remain in any desired position.
Other elbows are made with like angles and semicircular notches around their
flanges for the purpose of receiving either the screwed studs or the bolts which are
used to attach them. It will be seen that such elbows can be affixed to ordinary
flanged elbows with lugs and bolt holes, to point in any direction from the plane of
their horizontal circular area without previous preparation.
The damper is made with two friction axles on its spindle to correspond in size
and to fit into the two circular friction bearings which are formed when the elbow
or flanged outtake pipe hereafter described is connected on to the outtake flange of
stove as described above.
For the proper adjustment of the damper, I form a stop on each end of the top
friction bearings and upon the right hand bottom friction bearing I also form a
stop the space between these two stops is equal to one quarter of the entire
circumference of the friction bearings.
Upon the right hand friction axle of damper, I fit a projecting indicator which
limits the turn or movement of the damper 'twixt the two stops described to the
quarter of an entire revolution.
In one extreme position the damper is entirely closed across the smoke pipe area
and in the other extreme position it is fully open.
The exact position of the damper within the smoke pipe area at or between the

page_text: two stops before described is always shown by the projecting indicator on the right
hand friction axle of the damper.
In some cases I form the before described top friction bearings at one end of one
of the straight outtake flanged smoke pipes and in the friction bearings thus formed
the damper axles work as in the friction bearings formed by the elbow when
it is fitted on to the outtake flange of stove as before described. I arrange the
flanged smoke pipes to fit either directly on to the outtake flange of store or on
to the upper flange of a smoke pipe elbow.
I am aware that flanged smoke pipe elbows at various angles have been made-
and I have no novelty or invention to lay claim to on these precise lines.
Having now particularly described and ascertained the nature of my said inven-
ion, and in what manner the same is to be performed, I declare that what I
laim is :-
1. The entire arrangement of a flanged pipe or elbow-Figures I. II. and III. in
onnection with the Hanged outtake formed on top of stove with the friction
bearings; also the damper with its friction axles which fits therein and the inter-
changeable position of said elbows from the vertical to the horizontal or other

page_text: incline as described in this Specification and as illustrated in accompanying
drawings.
2. I further claim the use of flanged elbows of certain angles with semicircular
notches around their flanges by the attachment of which to an ordinary flanged
elbow any desired angle may be obtained without further labour or cost of
preparation.
2000
T. H. P. DENNIS.