AN IMPROVED FIRE ALARM WIRE OR COM- MUNICATOR
Year: 1881

page_text: LETTERS PATENT to Benjamin Joseph Barnard Mills, of tho Firm of Harris
and Mills, of 23, Southampton Buildings, in the County of Middlesex, Patent
Agent, for an Invention of "AN IMPROVED FIRE ALARM WIRE OR COM-
MUNICATOR." A communication from abroad by Paulin Amódée Charpentier,
of Paris, in the Republic of France.
PROVISIONAL SPECIFICATION left by the said Benjamin Joseph Barnard
Mills at the Office of the Commissioners of Patents on the 24th September
1881.
BENJAMIN JOSEPH BARNARD MILLS, of the Firm of Harris and Mills, of
23, Southampton Buildings, in the County of Middlesex, Patent Agent.
"AN IMPROVED FIRE ALARM WIRE OR COMMUNICATOR." A communication from
abroad by Paulin Amédée Charpentier, of Paris, in the Republic of France.
The Invention has for its object the production of an improved fire alarm wire
or communicator, in which the passage of the current is produced by means of a
metallic soldering effected by the rise of temperature.
This wire or communicator is composed of two copper wires, each covered with
silk steeped in paraffine or in any other suitable impermeable material which also
facilitates the soldering.
To these two wires are attached a third of tin or of other metal capable of melting
at a comparatively low temperature, and suitable to solder together the wires
coupled with it.
The three wires thus arranged are enveloped by a thread of cotton or silk also
steeped in paraffine. When the wires aro intended to be placed in very damp
situations they are again further covered with a coating of gutta percha or other
equivalent material.
I would remark that other convenient metals or alloys may be employed
according to the point of fusion it is desired to obtain, and the number may be
varied of the elementary wires composing the alarm wire or communicator.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Benjamin Joseph Barnard Mills in the Great Scal Patent Office
on the 23rd March 1882.
BENJAMIN JOSEPH BARNARD MILLS, of the Firm of Harris and Mills, of
23, Southampton Buildings, in the County of Middlesex, Patent Agent.
"AN IMPROVED FIRE ALARM WIRE OR COMMUNICATOR." A communication from
abroad by Paulin Amédée Charpentier, of Paris, in the Republic of France.
The Invention has for its object the production of an improved fire alarm wire
or communicator, in which the passage of the current is produced by means of a
metallic soldering effected by the rise of temperature.
This wire or communicator is composed of two copper wires, each covered with
silk steeped in paraffine or in any other suitable impermeable material which also
facilitates the soldering. To these two wires are attached a third of tin or of other
metal capable of melting at a comparatively low temperaturo, and suitable to
solder together the wires coupled with it.
The three wires thus arranged are enveloped by a thread of cotton or silk also
steeped in paraffine. When the wires are intended to be placed in very damp
situations they are again further covered with a coating of gutta percha or other
equivalent material.
I would remark that other convenient metals or alloys may be employed
according to the point of fusion it is desired to obtain, and the number may be
varied of the elementary wires composing the alarm wire or communicator.
Having thus described the nature of the said Invention, and the mode in
which the same is carried into effect, I would have it understood that--what I
claim is,―
The peculiar arrangement of fire alarm wire consisting of the combination of
two insulated conducting wires, and of a wire of any fusible material capable of
soldering the two conducting wires, and consequently, of closing the circuit
thereon when tho temperature rises abnormally at any point whatever of the course
of the said fire alarm wire.
In. witness whereof, I, the said Benjamin Joseph Barnard Mills, have here-
unto set my hand and seal, this Twenty third day of March, in the
year of our Lord One thousand eight hundred and eighty two. .