Improvements in and relating to Ventilators.
Year: 1899

page_text: Date of Application, 9th May, 1899-Accepted, 24th June, 1899
☐ Improvements in and relating to Ventilators.
I, MAX GAUL, of 141, Cranachstrasse, Frankfurt a/m Sachsenhausen,
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:-
This invention has reference to improvements in and relating to ventilators and
my invention consists in a ventilator which is automatically actuated the moment
a certain temperature is reached the apparatus being such that it may be set to
operate or actuate the ventilator at any desired temperature.
In the accompanying drawing my improved automatically operated ventilator
is shown adapted to a window.
In carrying my invention into practice I employ a thermometer a which I provide
with two say copper wires b. One of said wires entering the bulb of the ther-
mometer and the other wire being entered in the tube and at a point where the
number indicates the temperature at which the thermometer is to operate.
I also provide an electro-magnet e having a space or opening d into which a
soft iron rode may enter. The ventilator consists of a disc or equivalent f
pivotally supported on a central spindle which disc carries the rod e referred
to said rod, being of considerable weight, serving to normally retain the disc
in the position shown.
The disc f is provided with say four apertures or openings g and the window i
is also provided with four apertures h preferably slightly smaller than the
apertures the arrangement being such that normally the apertures h are closed
by the solid parts of the disc f.
If the temperature rises then the mercury in the thermometer rises until it
reaches the top wire band thereupon electrical connection is made. The wires b
are connected to a battery or equivalent the arrangement of the whole being such
that when the mercury has risen as described & made electrical connection, the
electro-magnet c draws the rod e into the opening d & thus rotates the ventilator
disc to a sufficient extent so that the openings of the ventilator disc and the
openings in the window more or less coincide & the ventilator is thus opened.
If the temperature & thereby the mercury fall, the electrical connection is
broken and the electro-magnet is no longer active & releases the rod e and by
the action of gravity this latter descends into its original position as shown &
the ventilator is again closed. The movement of the ventilator is preferably
limited by pins or stops k, 1.
If desired my improved apparatus may be employed to start an electro-motor
to operate a ventilator or if hot air or other such means for heating say a building
he employed then my improved apparatus may be adapted to operate or regulate
the damper or valve and thereby the temperature is more or less regulated.

page_text: 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. An improved ventilator having in combination a thermometer adapted to
automatically make or break the electrical connection with an electro-magnet
which latter draws or releases a bar or equivalent e on the ventilator disc all for
the purposes and substantially as described and illustrated.
2. The combination with a ventilator of a thermometer having a wire entered
into its bulb and another wire entered at and desired height in its tube so that
electrical connection will be made when the temperature is such as to cause the
mercury to rise into contact with the said wire in the tube all substantially in
the manner and for the purposes set forth.
Dated this 2nd day of May 1899.
By his Agents,
Horn, Son & Co.,
MAX GAUL.
151, Strand, (next to Somerset House), London.