IMPROVE- MENTS IN ELECTRIC BELL AND AUTOMATIC ALARM APPARATUS AND IN THE APPLICATIONS THEREOF
Year: 1882

page_text: LETTERS PATENT to Philip Middleton Justice of Southampton Buildings
in the County of Middlesex, Patent Agent for an Invention of " IMPROVE-
MENTS IN ELECTRIC BELL AND AUTOMATIC ALARM APPARATUS AND IN THE
APPLICATIONS THEREOF." Communicated to him from abroad by Victor
Vankeerberghen of Brussels in the Kingdom of Belgium
PROVISIONAL SPECIFICATION left by the said Philip Middleton Justice
at the Office of the Commissioners of Patents on the 25th August 1882.
PHILIP MIDDLETON JUSTICE of Southampton Buildings in the County of
Middlesex Patent Agent IMPROVEMENTS IN ELECTRIC BELL AND AUTOMATIC
ALARM APPARATUS AND IN THE APPLICATIONS THEREOF A communication to
me from abroad by Victor Vankeerberghen of Brussels in the Kingdom of
Belgium
"
Upon a piece or plate of wood metal or other suitable material I affix by
means of an ordinary terminal and its binding screw, a piece of copper bent at
right angles to its flange upon which is horizontally secured a plate composed of
metals of different expansive powers The free end of said plate is provided with
an insulated button and also with a hole hook or catch to which a cord may be
attached so that the apparatus may be worked directly by the hand or may be placed
above the door or in any convenient position and there worked by a cord or wire
Upon the first mentioned plate is secured the second terminal provided with an
adjusting screw by which the amount of motion necessary to ring the ordinary
electric bell may be regulated The adjusting screw is held in position by means
of a second screw of similar construction
It will be noted that the apparatus serves not only as an ordinary electric call bell
but also as an automatic alarm as in case of excessive heat the plate composed of
metals of different expansive powers will so expand as to touch the lower point of
contact and by completing the circuit cause an ordinary alarm bell to ring This

page_text: automatic system of alarm can evidently be used with advantage for many
purposes such for instance as a fire alarm in which case the expansion of the
sensitive plate may also be caused by means of suitable springs, levers and other
devices to turn on a steam or water supply and thus act as an automatic
extinguisher while in theatres the movement of the sensitive plate may be made
to release an iron or other fire proof curtain which will fall by its own weight
between the stage and auditorium The apparatus may also be employed for
indicating blood or other heat in hospitals As a guage to indicate steam pressure
and as an alarm for Banks and strong rooms as well as for various other useful
purposes The apparatus may also be employed to indicate cold and be employed
in refrigerating apparatus of various kinds especially in breweries or in other places
where fermentation takes place

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Philip Middleton Justice in the Great Seal Patent Office on the
20th December 1882.
"
PHILIP MIDDLETON JUSTICE of Southampton Buildings in the County of
Middlesex Patent Agent "IMPROVEMENTS IN ELECTRIC BELL AND AUTOMATIC
ALARM APPARATUS AND IN THE APPLICATIONS THEREOF A communication to
me from abroad by Victor Vankeerberghen of Brussels in the Kingdom of
Belgium.
This invention relates to apparatus employed for automatically giving notice of
increase or decrease of temperature or the presence of fire in rooms, buildings and
other places The invention being applicable for various other useful purposes all
as hereafter more fully described The invention consists in the arrangement and
combination of the following parts as also in the application thereof for the
purposes set forth and is in part an addition to or improvement on the invention
described by me in specification No. 3791 of 1882. To clearly explain my
invention and how the same may be practically employed, reference is made to the
accompanying drawings in which Figure 1 represents in side elevation the fixed
bottom plate Figure II represents in side elevation the fixed and moveable plates
in position Figure III represents a top view and Figure IV represents the top
plate with its connected flange as being disconnected from the rest of the
apparatus. Upon a piece or plate of wood, metal or other suitable material A
pierced with holes a a¹ a¹ a¹ is affixed by means of an ordinary terminal and
its binding screw, a piece of copper B bent at right angles to its flange b upon
which is horizontally secured a plate C composed of metals of different expansive
powers The free end c of said plate is provided with an insulated button d
and also with a hole hook or catch c' to which a cord may be attached so that
the apparatus may be worked directly by the hand or may be placed above the
door or in any convenient position and there worked by a cord or wire Upon the
first mentioned plate A at the point "a" is secured the second terminal D provided
with an adjusting screw by which the amount of motion necessary to ring the
ordinary electric bell may be regulated The adjusting screw is held in position
by means of a second screw of similar construction The plate A is held to the
wall or other support by means of screws passing through holes a' all while to
the point a is affixed the terminal D' It will be noted that the apparatus serves
not only as an ordinary electric call bell but also as an automatic alarm as in case of
excessive heat the plate C composed of metals of different expansive powers will
50 expand as to touch the lower point of contact, or the adjusting screw which
carries terminal D and by completing the circuit cause an ordinary alarm bell to
ring This automatic system of aların can evidently be used with advantage for
many purposes such for instance as a fire alarm in which case the expansion of
the sensitive plate may also be caused by means of suitable springs, levers and
other devices to turn on a steam or water supply and thus act as an automatic
extinguisher, while in theatres, the movement of the sensitive plate may be made to
release an iron or other fire-proof curtain which will fall by its own weight between
the stage and auditorium The apparatus may also be employed for indicating blood
or other heat in hospitals. As a guage to indicate steam pressure, and as an alarm
for Banks and strong rooms as well as for various other useful purposes. The
apparatus may also be employed to indicate cold and be employed in refrigerating
apparatus of various kinds especially in breweries or in other places where
fermentation takes place. Having thus described the nature of the invention of

page_text: my foreign correspondent and how the same may be practically employed what I
claim and desire to secure by Letters Patent is
The arrangement and combination of parts hereinbefore described forming an
electric call button and fire alarm substantially as and for the purposes set forth
In Witness whereof I the said Philip Middleton Justice have hereunto set
my hand and seal this twentieth day of December in the year of Our Lord
One thousand eight hundred and eighty two
Signed Sealed and Delivered
in presence of
ALLEN P JONES
53 Chancery Lane
London W.C.
PHILIP M. JUSTICE (L.S.)