Improvements in Apparatus for the Automatic Extinction of the Flame in Coffee Machines.
Year: 1893

page_text: Date of Application, 27th Oct., 1893-Accepted, 30th Dec., 1893
COMPLETE SPECIFICATION.”
Improvements in Apparatus for the Automatic Extinction of the
Flame in Coffee Machines.
I, CARL STREBLOW of 41 Michaelkirchstrasse Berlin, in the Empire of
Germany, Merchant, 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 automatic extinguishing apparatus of the present invention consists essentially
in the lowering of a float arranged in the boiler when the water has been forced
out of the latter, causing the downward movement of a rod which on its part
effects in any suitable manner the extinction of the flame of a spirit, petroleum, or
gas lamp.
The invention is shown on the annexed drawing carried out in several ways as
examples.
Fig. 1 shows the front view with partial vertical section of a coffee machine
provided with the new apparatus, spirit being used for heating.
Fig. 2 is a plan of the same, and
Fig. 3 is a view of a part of the rod acted upon by the float, together with
guide, on an enlarged scale.
In Figs. 4 and 5 is shown the employment of a gas burner and of a petroleum
lamp respectively.
In a sunken portion a¹ of the boiler a is the float b with the tubular rod 6' which
latter forms an extension of the body of the float and projects outward above the
top of the boiler. The opening through which the tube 6' passes is formed as a
valve seat a into which the conical valve 6 fitted on 6' passes. The float 6 b¹ is so
balanced that when the boiler is full the valve a² 6° is closed. On the boiler a is
also fixed the guide sleeve d which serves for the reception of the rod c. The
latter carries a bend c' at the top by means of which it rests against the side of the
float rod b'. The guide d is provided with a vertical slot d which terminates_at
the top in a slanting curve. On this slanting surface rests the rod c by means of a
small pin c. The lower bent end of the rod e projects from a side opening in the
sleeve d and carries the cover plate for the spirit lamp e. The tubes markedƒƒ'
convey the water from the boiler a to the ground coffee holder g. h is a safety
valve.
The manner of working is as follows:-
When the rod c rests on the slanting slot d¹ of the sleeve d as shown, it has a
tendency to turn in the direction indicated by the arrows in Figs. 1 and 2, but its
movement is prevented so long as the float tube projects out of the boiler. When
steam is produced after lighting the flame, a tight joint is made at a² 62 and on
further production of steam the water is gradually forced from the boiler a through
the open tube f1 (the other tube f is closed and is only used for the effect of
symmetry) into the coffee holder g. As soon as the water has left the boiler the
float 6 sinks to its lowest position, the float tube 6' leaves the rod c free and the
latter falls by its own weight, and, by means of the slanting slot d' is turned round
in the direction shown by the arrows. By this rotating movement the cover c³ is
first brought from its side position vertically over the spirit lamp e, on the further
fall of the rode through the vertical part of the slot d¹ the extinguishing plate
falls on to the lamp and puts the flame out.
The arrangement shown in Fig. 4 serves to automatically extinguish the flame
of a gas burner. In this the lower bend of the rod c with the extinguisher plate c
(Fig. 1) is dispensed with. At the lower end of the rod is a small plunger c* which

page_text: by the fall of the rod drops into a hole bored at right angles to the axis of the gas
tube c³, the inlet of gas is thereby closed and the flame extinguished.
The arrangement shown in Fig. 5 serves for the automatic extinction of the flame
when a petroleum lamp is used. The corresponding bent tube c here is in unbroken
connection with the float so that it rises and falls therewith. The lower end of
the rod c is connected to a double armed lever c' the free fork shaped end of which
acts upon a ring e pushed over the lamp c. If the float and the rod c fall the
lever brings the ring over the flaine and extinguishes it.
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. An arrangement for the automatic extinction of the flame in coffee machines
consisting of a float b in the boiler which by means of an extension 6' projects
through the cover and in its topmost position closes the opening in the latter whilst
by the fall of the float and by means of the extension & the downward movement
of a rod e is effected which then effects the extinction of whatever heating flame
may be employed substantially as described.
2. The arrangement and construction of apparatus for the automatic extinction
of the flame in coffee machines substantially as described with reference to the
drawings.
Dated this 27th day of October 1893.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.