A Magnetic Water Gauge or Indicator of Level of Liquid.
Year: 1892

page_text: Date of Application, 1st Oct., 1892-Accepted, 19th Nov., 1892
COMPLETE SPECIFICATION.
A Magnetic Water Gauge or Indicator of Level of Liquid.
1, LJUBOMIR KLERITJ, of Milan Street 11, Belgrad, Servia, Professor, 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:-
My improved water gauge or indicator of level of liquid is based upon the
principle of induction of a magnet upon a needle, causing it to follow the movements
of the magnet.
For this purpose I arrange a magnet in such a manner that it changes its position
in accordance with changes of the level of water in a steam boiler or of liquid in
any vessel containing liquid. The needle which is visible following the movements
of the magnet which may be hidden indicates by its position the level.
I may employ several needles and 1 may provide in certain positions electric
contacts by which, when the water or liquid attains its highest or lowest level, an
electric current is made to actuate an alarum.
The accompanying drawings illustrate several arrangements of level indicators
according to my invention.
Figure 1 is a vertical section shewing a floating magnet, actuating a number of
needles, this magnet being arranged in a pipe or vessel communicating with a steam
boiler.
Figure 2 represents a modification in which the magnetic float is arranged within
the boiler.
Figure 3 is a sectional plan through the float and its guide taken on the line xx
of Figure 2.
Figure 4 represents another modification in which the magnet is arranged in a
separate casing and actuated by a non magnetic float.
Figure 5 is a cross section through the magnet and compass casing on the line y y
of Figure 4.
Figure 6 is a detail of the arrangement shewn in Figure 4.
As shewn in Figure 1 I employ a float e situated in a tube or vessel a commu-
nicating by the tubes b and c with the steam and water spaces of a boiler d. This
float carries a magnet n 8.
Outside the vessel a is a casing glazed on one side and containing a number
of needles marked 1 to 9 each mounted free to oscillate about its own axis.
From two insulated electric contacts k₁k two conducting wires lead to an alarm
bell and battery, a return conductor being connected at ³ to the metallic casing f
and so to the axes of the needles.
The closing of the circuit is effected when the needle 2 takes a horizontal
position the water level being then at its highest limit, or by the needle 8 when
the water level has attained its lowest limit giving thus in either case an audible
signal.
As the water level H H varies the float e occupies a higher or lower
position, thereby causing the needles to change their attitudes, as indicated in
Figure 1.
The water level corresponds with the needle which is horizontal, the needles
above the water level being inclined downwards and those below the water level
being inclined upwards.
In the modification, shewn in Figures 2 and 3, the vessel a is dispensed with, the
float e being placed within the boiler, in a guide casing g perforated at the top and
bottom.

page_text: In the modification Figure 4, the float e has no magnet but carries a rod h
guided by rollers r, and extending up into a closed pipe 1.
71
mounted
In the casing i is mounted a disc m (Figures 5 and 6) carrying a magnet.
this disc being caused to revolve by a wire or band n³ (Figure 6), attached at n
to the rod so that as the float e ascends or descends in accordance with variations
of the water level H, the magnet carried by the disc m is more or less turned.
In front of the casing i is situated a compass box o containing a needle
on an axis in line with the axis of m. This needle follows the movements of the
magnet on m and thus indicates the position of the water level upon a dial on, or
visible through, the glass q of the compass casing o. Instead of moving the disc m
by a wire or band, the rod h may be toothed as a rack to gear with teeth on m.
P
In this case alarum bells and batteries may be arranged with suitable
contact for indicating audibly the highest or lowest level.
In order to provide against deposit of boiler scale in the casing which contains
the float or on the float, the casing may be charged with oil or other liquid lighter
than water.
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. A magnetic water gauge or indicator of level of liquid consisting of a magnet,
which changes its position in correspondence with the change of level, in com-
bination with a needle or several needles subject to the inductive influence of the
magnet, so that the positions of the needles indicate the level, substantially as
described.
2. In apparatus such as is above referred to the arrangement of the magnet in a
float, in combination with a number of needles mounted on parallel axes above
each other, substantially as described with reference to Figures 1, 2 and 3.
3. The arrangement of the magnet caused by connection to the float to turn
about its axis, in combination with a needle having its axis in line with that of
the magnet substantially as described with reference to Figures 4, 5 and 6.
4. In combination with level indicators such as are above referred to, a
battery and bell with suitable conductors and contacts so arranged that an
audible alarm is given when the level of the liquid attains its highest or lowest
limit substantially as described.
Dated this 1st day of October 1892.
ABEL & IMRAY,
Agents for the Applicant.