A New or Improved Electrical Appliance for Sounding an Alarm when any desired Temperature is Reached, also serving as a Fire Alarm.
Year: 1894

page_text: Date of Application, 12th Apr., 1894-Accepted, 12th May, 1894
A New or Improved Electrical Appliance for Sounding an Alarm
when any desired Temperature is Reached, also serving as a
Fire Alarm.
I, CHARLES BALBIANI, of 48, Upper Bedford Place, London, W.C., Gentleman,
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 invention relates to a new or improved electrical appliance for sounding an
alarm when any desired temperature is reached, in conservatories, hot-houses, or in
other places where such an alarm may be necessary, or which may be employed in
ordinary dwelling houses for giving an alarm in case of fire.
In carrying my invention into practical effect, I provide two spring blades
mounted upon suitable standards and connected by means of two strips of copper,
brass, or other good conducting material, to a pair of ordinary electrical terminals,
by means of which the device may be connected to the bell or battery wires. To
each of the aforesaid spring blades is attached a small block of brass, copper, &c.
so that upon coming together a good contact may be formed, these blocks being
placed about midway in the length of the spring blades, whilst the lower ends of
the said blades are furnished with a small point or projection for the purpose of
gripping and securely holding a short length of wax or other suitable material
whereby the said blades are kept apart, the whole device being mounted upon a
base of wood or other material and furnished with a perforated plate at the top
by means of which it may be conveniently suspended in any desired position or
place.
In order that my invention may be more fully understood, I will now proceed to
describe same with reference to the drawing herewith which shows a plan view of
my improved device.
The two spring blades a a' are secured by means of screws, rivets, or in any other
suitable manner to the angle pieces or standards bb, the said standards being con-
nected by the strips of copper, brass &c. c c' to the terminals d d to which the bell
or battery wires may be conveniently attached. The spring blades a a' are furnished
with blocks of brass, copper or other suitable material e ei so as to form a good
electrical connection when they come into contact, while the lower ends of the said
spring blades are furnished with points or projections for securely holding
material. The whole
between them the small block w of wax or other suitable
device is suitably mounted upon the base B furnished with a perforated plate g by
means of which it may be suspended in any desired position, while the greater part
of the device is surrounded by the frame F carrying a bath or tray h arranged so as
to catch and contain the wax or the like w when it is melted.
In some cases the frame F might be covered with glass when it would be
connected to the base B by hooks or catches so as to be capable of easy
removal.
My improved device operates in the following manner -The block w which may
be of wax, or a combination of wax and other materials, prepared so as to melt at
any given temperature, is placed between the blades a a¹ as shown in the drawing,
in such a manner as to keep the blocks e e' well apart, thereby forming a break in
the circuit, but upon the conservatory, room, or the like reaching a temperature at
which the wax will melt, the two arms come together and the circuit is completed
thereby giving warning by ringing the bell.

page_text: 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. The new or improved device for giving audible warning, upon a conservatory,
room, or the like, reaching a certain temperature, arranged, constructed, and
operating, substantially, as herein described and shown.
2. In the device such as above claimed, the spring blades a a', furnished with
blocks eel, mounted to standards and kept apart or out of contact by the bar of
wax or other suitable material w, substantially as described and for the purposes
-specified.
ليمي
1300
F. G. CASSELL,
Of Cassell & Co.,
22, Glasshouse Street, Regent Street, London, W.