AN IMPROVED BURGLAR AND FIRE ALARM to be as follows
Year: 1884

page_text: I GEORGE LUSH PEARSON of 73 Devonshire Road Holloway in the County of
Middlesex Engineer do hereby declare the nature of my Invention for "AN
IMPROVED BURGLAR AND FIRE ALARM to be as follows:-
"3
The object of this invention is to alarm by means of electric communication
1st with a stationary lamp on the exterior of the house or building, and 2nd with
bells in the interior or exterior of the house or building.
I provide a lamp with three red bull's eyes, and fix it on a bracket on the
exterior of the house or building. This lamp may be lighted either with gas or
electric light. I also provide a lever and balance weight which I attach to the
main tap of the gas pipe which supplies the lamp. I further provide an electric
magnet in front of which is a clutch. To fix the lamp for working, I attach to the
clutch the lever, which is attached to the main tap of the gas pipe as is herein-
before mentioned, and by this means the gas is turned low. Wires from the
magnet communicate with contacts on all the doors and windows of the house or
building and also with a breaker or electric bell in the owner's or housekeeper's
bed-roon, or any other part of the house or building where it may be required.
The lamp being thus fixed the housekeeper reverses the breaker whereupon the
contacts on all the doors and windows become charged with electricity and are
made ready for action by means of a battery. When a door or window is opened
or attempted to be forced the contacts communicate with the electric magnet,
which draws the clutch to itself and releases the lever, which is overpowered by
the weight on its end, and causes the gas to be turned on to its full extent, and
the bell or bells to ring, and the three red bull's eyes to be shown thus giving
warning to the police and inmates of the house or building. When my invention
is to be used as a fire alarm, I fix a thermometer in each room of the house or
building and into the bulb containing the quicksilver I introduce a piece of
platinum wire. I also introduce through the top of the thermometer another piece
of platinum wire, and I then connect said 'respective pieces of platinum wire with
the main wires attached to the outside of the house or building. The said last
mentioned piece of platinum wire can be adjusted or set to any degree on the
index of the thermometer, and when the heat causes the quicksilver to rise to said
degree the quicksilver comes in contact with the said last mentioned piece of
platinum wire and completes the magnetic circuit and causes the lamp on the
outside of the house or building to show the three red bull's eyes.
P. O'HALLORAN,
Patent Agent for the Applicant,
28, Southampton Buildings, W.C.

page_text: I GEORGE LUSI PEARSON of 73 Devonshire Road Holloway in the County of
Middlesex Engineer, do hereby declare the nature of my invention for "AN
and in what manner the same is to be
IMPROVED BURGLAR AND FIRE ALARM
performed, to be particularly described and ascertained in and by the following
statement:
་་
ور
The object of this invention is to alarm by means of Electric Communication
1st with a stationary lamp.on the exterior of the house or building, and 2nd with
bells in the interior or on the exterior of the house or building. In order that my
invention may be clearly understood I refer to the accompanying drawings in
which figure 1 shows the apparatus in the interior of the house or building and
also the lamp as fixed to the exterior thereof. Figure 2 shows in section a
window with an ordinary electric breaker.
The lamp a provided with three red bull's eyes is fixed by means of a bracket to
the exterior of the house or building, and may be lighted with gas, or electric light.
The lever b, and balance weight 61 are attached to the main tap c of the gas pipe.
which supplies the lamp. In front of the electric magnet d is a clutch. e. To fix
'the lamp a for working I attach to the clutch e the lever b, and by this means the
gas is turned low.. Wires from the magnet d communicate with contacts on all
the doors and windows of the house or building and also with a breaker for
electric bell f¹ in the housekeeper's bed-room, or in any other part of the house or
building where it may be desired. The lamp a being thus fixed the housekeeper
reverses the breaker f whereupon the contacts on all the doors and windows
become charged with electricity and are made ready for action by means of the
battery g. When a door or window is opened, or attempted to be forced the
contacts communicate with the magnet & which draws to itself the clutch e, and
releases the lever b which is overpowered by the balance weight 6', and by these
'means the gas is turned on, to the full extent, and the bell or bells are caused to
ring, and the red bull's eyes to be shown thus giving warning to the police and
inmates of the house or building.
When my invention is to be used as a fire-alarm, I fix a thermometer h in each
room of the house or building and into the bulb containing the mercury I introduce
a piece of platinum wire i I also introduce-through the top of the thermometer
another piece of platinum wire and I then connect said respective pieces of
The afore-
platinum wire with the main wires which are attached to the lamp at.
said piece of platinum wire i¹ can be set to any degree on the index of the
thermometer, and when the heat has caused the mercury to rise to said degree,
the mercury comes in contact with said piece of platinum wire and completes the
magnetic circuit, and causes the lamp a to show the three red bull's-eyes.

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
The combination and arrangement of the several parts thereof substantially as
and for the purposes herein before described and illustrated by the accompanying™
drawings.