Improvements in Controlling and Lighting Devices for Gas Burners.
Year: 1898

page_text: Date of Application, 12th Dec., 1898-Accepted, 4th Feb., 1899
COMPLETE SPECIFICATION.
Improvements in Controlling and Lighting Devices for Gas
Burners.
I, WILHELM KNOPF, of 198, Oranien Strasse, Berlin, S.O., in the Empire of
Germany, Manufacturer, 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 device by means of which the gas issuing from
gas burners of all kinds may be exactly regulated. This is effected, in accordance
with my said invention, by making the outlet opening of pointed conical form
which can only be opened or closed gradually by means of a thin pointed part
displaceable vertically.
In the accompanying drawing:
Figure 1 is a vertical section of one form of the improved regulator.
Figure 2 is a detail view thereof and
Figure 3 is a vertical section of another form or modification.
In Figure 1 the outlet is closed by means of a pin d the lower extremity of
which forms a sharp point. This pin is guided above by means of a short
cylindrical tube k which is capable of vertical displacement within a tube h
arranged upon the burner a. This displacement is effected by means of an
oblique slot g in which the arm f works; the extremity e of this arm surrounds
the pin d, whilst the outer extremity terminates in a knob f¹.
It will readily be understood that, by means of this simple arrangement, when
the knob f is displaced the point d will either leave the aperture c or enter the
same, as the case may be. According to the extent of the lateral displacement of
the arm in the slot g, the size of the outlet is regulated. In Figure 1 the
aperture is shewn completely closed so that no gas can escape from the burner;
in Figure 2 on the other hand, the aperture c is entirely free so that the full
quantity of gas is able to issue. In the intermediate positions of the knob f¹
the size of the aperture varies.
In the burner illustrated in Figure 1, the tube h serves not only for guiding
the pin and its cylinder k, but also as a cylinder for mixing the gas issuing
from the aperture c with the air entering through the tube in proximity to
the opening of the burner. The mixture of gas and air burns with a blue flame
in the known manner.
In this form of burner the pin point performs a further and very important
office, that is to say, it serves also as a cleansing device for the aperture c. It
is well known that, when the gas manufactured from liquid illuminants, such as
petroleum for example, is employed instead of illuminating gas, a fine deposit,
which usually consists of a sticky coating, is formed upon the outlet or burner
aperture in consequence of the cooling which takes place. This coat may increase
to such an extent as to completely close the outlet, and this outlet should con-
sequently be cleansed from time to time. In the present case this cleansing of
the burner is effected by means of the point d' each time the aperture is closed,
TD 077

page_text: owing to the fact that the point d¹ penetrates and removes any coating which
may have formed.
Other
The vertical displacement of the pin d may also be effected in other ways
(Figure 3). If the tube k is prolonged downwardly upon one side and is there
provided with a cross-piece f through which a set screw i passes and bears against
a projection from the tube h, thus limiting the rise of the pin d, the descent
of the pin d is limited by its encountering the sides of the aperture c.
means for effecting the vertical displacement of the pin d may readily be devised.
The form of burner illustrated in Figure 3 differs from that shown in Figures 1
and 2 mainly owing to the fact that the closing pin d is replaced by a fine
tube. The aperture is thus never completely closed, as even if the point of
the pin d has entirely entered the conical aperture c, gas is still able to escape
upwards through the small tube d. The arrangement is such that the gas issuing
at the upper extremity of the tube d is ignited by the flame burning upon
the aperture between h and at the moment when the supply of gas to the
flame proper is interrupted by the descent of the tube d. The small flame which
is so ignited at the aperture du then serves as an ignition flame, and it continues
to burn until the tube d is caused to rise out of the aperture c, whereupon the
gas naturally follows the most easy path, which is at the side of the point d¹,
and becomes ignited above at the ignition or bye-pass flame.
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:
1. In gas burners, the closing of the outlet aperture (c) by means of the
pointed extremity (7) of a pin (d) displaceable in a vertical direction, such point
serving at the same time as a device for cleansing the aperture (c).
2. In gas burners of the kind described in Claim 1, the use instead of a pin (d)
of a small tube through which the gas is able to escape when the aperture (c) is
closed, and burning upon the upper extremity of such tube serves as an ignition
flame for the burner proper.
Dated this 7th day of December 1898.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.