Improved Damper for Household Stoves.
Year: 1891

page_text: Date of Application, 19th Oct., 1891-Accepted, 21st Nov.,
1891
COMPLETE SPECIFICATION.
Improved Damper for Household Stoves.
I ALBIN FLECHTNER, Upholsterer of 44 Hazellenstr. Metz in the Empire
of Germany do hereby declare the nature of my invention and the manner of
performing the same to be particularly described in and by the following
statement:-
My invention relates to a damper or draught regulator for household stoves and
its object is to provide a device by means of which the temperature may be more
sensitively varied than heretofore, without however allowing the carbonic oxide
produced to escape into the room.
I accomplish this object by means of the apparatus hereinafter more particularly
described and illustrated in the accompanying drawings in which
Fig. 1 shows an elevation of the device with the damper in an open position.
Fig. 2 is the same elevation with the damper closed and
Fig. 3 is a section through the flue with my improved damper arranged therein.
The device which is arranged in the chimney, consists mainly of two discs a
and b, the former of which is pivoted in the chimney at c, and, d, whilst the latter
is centrally pivoted to the disc a at f. The disc b is provided with a pin g which
engages in the slot of an arm arranged on and at right angles to the rod h. The
disc may be partially rotated on the disc a by pulling rod h down or out into the
position shown in Fig. 2.
the same.
The rod is guided in the sleeve m which is attached to the trunnion or hollow
pivot d, said sleeve being provided at its lower end with an arrow n serving as
handle and at the same time pointer, to show the position of the damper a b. A
spring m is arranged round the sleeve m and presses at one end against the
exterior of the flue or chimney and at the other end against the arrow n or collar of
The object of this spring is to retain the damper in any position by
holding it more tightly in one direction against the interior of the chimney.
The discs a and b are furthermore provided with orifices or perforations i, the
perforations of each disc being made to correspond with the other as shown in
Fig. 2.
The disc a is provided with an outer circle of perforations k, which are
always open.
When the damper has been adjusted in position in the chimney the draught may
be more sensitively regulated by adjusting the disc on the disc a by means of
rod h. If the damper is fully closed, the carbonic oxide, which is always being
generated may still escape through the outer ring of perforations.
Besides effecting a considerable saving of fuel, my improved damper enables a
much more sensitive regulation of the draught and consequently a more advantageous
generation of heat.
Having now particularly described and ascertained the nature of my said
invention and the manner of performing the same I declare that what I
claim is :-
1) The combination of a disc a having outer ring of perforations & and interior,
perforations and handle n, with disc b centrally pivoted to disc a at f and
perforated to correspond with the central perforations i of disc a, and means for
revolving disc on the disc a substantially as described.
2) In combination with the disc a pivoted in the chimney at c d and perforated
as described, said disc having operating handle n, and retaining spring m', the
disc having corresponding interior perforations and being centrally pivoted to
the disc a at f, said disc 6 having rod guided in the sleeve m of the handle n and

page_text: having slotted arm adapted to engage with the pin g of disc b substantially as
described.
3) The improved damper for household stoves substantially as hereinbefore
described and illustrated in the accompanying drawings.
Dated this 17th day of October 1891.
RAYNER & CASSELL,
37, Chancery Lane, W.C., Agents for the Applicant.