Improved Valve Apparatus Serving either for Ventilation or for Hot Air Supply and the Combination of Gas Burners therewith.
Year: 1888

page_text: Date of Application, 19th Oct., 1888
Specification Accepted, 22nd Jan., 1889
Improved Valve Apparatus Serving either for Ventilation or for
Hot Air Supply and the Combination of Gas Burners therewith.
I, WILHELM LÖNHOLDT of 1 Schellingstrasse Berlin in the Empire of Germany,
Engineer and Architect 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 relates to a construction of valve apparatus serving either for
ventilation or hot air admission which obviates the defects existing in similar apparatus
as heretofore constructed.
According to the present invention the apparatus can be used indifferently for
ventilating or for hot air supply, without necessitating any change of form, but only
requiring to be inverted, whereas in such apparatus as heretofore employed a change
of form was required for adapting it to the one or the other purpose.
The construction of the apparatus is shewn on the accompanying drawing, in which
Fig. 1 shews a front view of an apparatus with a single flap or valve and Fig. 2 shews
a vertical section of the same; Fig. 3 shews a vertical section of the apparatus with
two flaps or valves, adapted as hot air supply apparatus, and Fig. 4 shews a part front
view of the same. Fig. 5 shews a vertical section of the same apparatus adapted for
ventilation.
Fig. 6 shews a modification of the arrangement at Fig. 2, having a special
burner for the ventilating valve. Fig. 7 shews a front view of the burner with
heating flap.
The apparatus consists of a cast iron casing a in which are one or more louvere
blades or flaps 6 capable of turning on pivots c c. These blades or flaps are weighted
at k or they are otherwise made to preponderate on that side, so that they always tend
to close by bearing against fillets on the framing, so as to effect a perfectly tight
closure.

page_text: In the arrangement with only one blade or flap, this is provided with a chain d
either at the heavy end when it is to serve for ventilation, or at the light end when it
serves for hot air supply, which chain is led over two rollers F F to insure its reliable
action.
In the arrangement with two or more blades or flaps, these are connected together
by a chain.
In the open position the blade (in the case of two or more, the uppermost one) forms
a nozzle-like space h which projects somewhat into the discharge flue i, and thus effects
a suction of the vitiated air."
This apparatus can be used without alteration as a hot air supply valve, or as
ventilating valve. When employing it as ventilating valve (Figs. 2 and 5) the flap
or valve 6 closes as soon as the chain d is freed in consequence of the weight at k, and
it is opened by pulling at the chain. When using the apparatus for hot air supply, in
which case its position is inverted as shewn, the flaps are closed by pulling at the chain,
and open automatically on releasing the chain.
The above described apparatus therefore only differs in its application; when the
chain roller is situated at top it serves as ventilating valve, and when it is at bottom it
serves for hot air admission. In both cases the flaps or blades, when open, lie in the
direction of the air currents. By means of the splayed opening and by arranging
the top m of the hot air chamber somewhat below the opening of the apparatus, the
currents of air are caused to move in an upward direction without disturbance. An
advantage of this apparatus over others of the kind consists in the fact that the casing
is self-contained, and any ornamental grating and perforated plate or casing can be
fixed on it by screws.
In order to increase the efficiency of the apparatus as ventilator, the following
arrangement is employed. As the flue i does not of itself create any draught, and a
difference of temperature requires to be produced in it, the apparatus is supplied with
a simple heating arrangement p. This consists of a Bunsens burner q Fig. 2 which is
attached directly to the bend of a gas supply pipe provided with a cock s.
The burner head is arranged parallel to the inclined part of the casing and is covered
by a heating plate t, which produces a very considerable rarefaction in the casing a
whereby a powerful suction of the air from the room to be ventilated is produced,
which air consequently escapes with considerable energy.
In place of the Bunsen's Burner may be used the special construction of burner.
which I have invented and which is shewn at Figs. 6 and 7.
In this burner the gas supply pipe is led over the burner head in order to heat the
gas supply before issuing by means of its own flame.
This heating and the consequent rarefaction of the issuing gas at once reduces the
consumption of gaz to one half, and consequently the illuminating power is also
reduced by one half without effecting any reduction of the heating power of the
burner.
A heating plate t' is fixed behind this burner for effectually transmitting the heat to
the air current.
The gas heating apparatus is permanently attached to the ventilating apparatus and
only requires attachment to the gas supply pipe.
The advantages of this apparatus are firstly that the parts are all constructed of cast
iron and are therefore very durable; secondly that, one and the same pattern serves
both for ventilating and hot air supply, and thirdly, as the apparatus is fitted complete
in the factory, the cost of installation is considerably less than with other apparatus of
the kind.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
=
1. An apparatus capable of serving both for ventilation and for hot air supply con-
31.

page_text: pivots and weighted on one side, which blades or flaps are moved by chains or other
means so as to be brought in the direction of the air current, the apparatus being so
arranged that when fixed in one position, with the guide rollers at top, it serves as
ventilating apparatus and when fixed in the reverse position with the guide rollers
below, it serves as hot air supply valve, substantially as herein described.
2. The use in combination with valve apparatus such as is referred to in the pre-
ceding claim, when used for ventilation, of one or more Bunsen burners or burners of
the herein described or other construction, with heating plate, for heating and rarifying
the air passing through the apparatus, substantially as herein described.
Dated this 19th day of October 1888.
ABEL & IMRAY,
Agents for the Applicant.