An Improved Electric Alarm for Railway Trains and other purposes.
Year: 1896

page_text: Date of Application, 28th May, 1896
Complete Specification Left, 26th Feb., 1897-Accepted, 15th May, 1897
PROVISIONAL SPECIFICATION.
An Improved Electric Alarm for Railway Trains and other
purposes.
HENRY BINKO, Electrical Engineer, 34 Leadenhall Street London, E.C. do
hereby declare the nature of this invention to be as follows:-
Electric alarms especially such as used for intercommunication on passenger trains
to give danger signals between passenger & guard, are generally so constructed that
the front cf the alarm box is provided with a glass which, when broken relieves a
contact stud or spring, & thereby closes the circuit by coming in contact with the
terminal parts of the positive & negative wires of the battery, in which circuit a
suitable electric bell is provided for the purpose of sounding the alarm.
It will be easily understood that when the glass is broken in one compartment,
the bell will ring continuously, until the batteries are exhausted, & thereby make
the alarm useless if further required in any other compartment during the
journey.
The object of my invention is not only to prevent the batteries running out, but.
to make the alarm of further utility, after the glass has been broken in one or more
compartments previously, a matter of very great importance on trains going a long
distance.
For that purpose, I provide an alarm box of any kind with a bridge piece which
enables anyone after the front glass is broken & the alarm given to quickly replace
the contact stud or spring.
I claim as the main part of my invention, the bridge piece for pressing the
contact stud, pillar, or spring, made in any shape & material to its normal position,
as before the glass was broken to relieve the same.
Dad oil of M... 1000
COMPLETE SPECIFICATION.
An Improved Electric Alarm for Railway Trains and other
purposes.
HENRY BINKO Electrical Engineer 34 Leadenhall Street London E.C. 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:
Electric alarms especially such as used for intercommunication on passenger
trains to give danger signals between passenger & guard, are generally so
constructed that the front of the alarm box is provided with a glass which, when
broken relieves a contact stud or spring & thereby closes the circuit by coming in
contact with the terminal parts of the positive & negative wires of the battery, in

page_text: which circuit; a suitable electric hell is provided for the purpose of sounding
the alarm.
It will be easily understood that when the glass is broken in one compartment,
the bell will ring continuously until the batteries are exhausted & thereby make
the alarm useless if further required in any other compartment during the
journey.
The object of my invention is, not only to prevent the batteries running out, but
to make the alarm of further utility after the glass has been broken in one or more
compartments previously, a matter of very great importance on trains going a long
distance.
For that purpose I provide an alarm box of any kind with a bridge-piece which
enables anyone after the front glass is broken & the alarm given to quickly replace
the contact stud or spring, and in order that my invention may be more clearly
understood & readily carried into effect, I describe in the accompanying drawings
more fully the same.
Fig. (1) is an elevation of the alarm box with the glass intact.
Fig. (2) is a cross section with the front glass broken.
A is the wood-case containing the electric alarm, H is a sliding lid of the box
having an opal or transparent glass G, which presses the stud C down, & keeps the
-circuit open, F is the bridge-piece, M is the stud guide, E & D are the electric
contact springs, B is the ebonite base carrying the electric contacts.
In Fig. (I) the bridge-piece F is shown when not in use, & in Fig. (2) the
bridge-piece is shown pressing down the stud C after the glass G has been
broken.
Having now particularly described & 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 bridge-piece for pressing the contact stud, or spring, to its normal position
as before the glass was broken to relieve the same.
HENRY BINKO.