An Improved Combined Electric Bell and Indicator.
Year: 1895

page_text: Date of Application, 9th Jan., 1895
.Complete Specification Left, 8th Nov., 1895-Accepted, 28th Dec., 1895
PROVISIONAL SPECIFICATION.
An Improved Combined Electric Bell and Indicator.
AUGUST ECKSTEIN Electrical Engineer 45 Chapel Street Salford, Manchester
and RICHARD PENTNEY EIDSFORTH Electrical Engineer 45 Chapel Street
Salford, Manchester, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to an improved electric indicator & bell combination in
which compactness simplicity of manufacture, and reliability are obtained.
In our invention, the pillar which carries the gong of an electric bell, has fitted
to it a coil of insulated wire, so as to become an electro-magnet, the coil being
placed upon the pillar so that the ends of the pillar form the poles of the electro-
magnet, the pillar forming its core. The base which supports the pillar is
preferably a stamping & so formed that a narrow piece is bent up parallel with
the said core, this piece having knife-edged notches in it upon which is hung au
armature so shaped as to be capable of closing the magnetic circuit of the
aforesaid electro magnet. Attached to this armature is a light rod having an
indicating disc or flag at its end, the whole forming a pendulum, whose centre of
oscillation is upon the aforesaid knife-edges, the flag or disc projecting below the
gong of the bell. The core of this indicating device as aforesaid supports the gong
of the electric bell to which the device is applied.
The coil is preferably connected across the terminals of the bell or may be
connected, if desired in series with the bell coils.
When a current is flowing through the bell circuit, it will be seen that the electro
magnet of the indicator is excited, its armature is attracted, & when the current
is stopped, the armature is released & sets into oscillation the disc or flag it carries,
the swinging continuing for a certain time, so as to indicate that the bell bas been
rung:
Dated this 8th day of January 1895.
AUGUST ECKSTEIN.
R. P. EIDSFORTH.
An Improved Combined Electric Bell and Indicator.
We, AUGUST ECKSTEIN, Electrical Engineer, and RICHARD PENTNEY
EIDSFORTH, Electrical Engineer, both of No. 45 Chapel Street, Salford,
Manchester, in the County of Lancaster, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
Our invention relates to an improved electric indicator and bell combination
in which compactness, simplicity of manufacture, and reliability are obtained.
In order that our invention may be the better understood, we have appended the
accompanying sheet of drawings in which the figure shows a perspective view of a
portion of the base of an electric bell with the gong detached, the circumference of
which, however, is shown by dotted lines.

page_text: In carrying our invention into effect, the pillar P, which supports the "gong has
fitted to it a coil C of insulated wire, so as to vitalise it as an electro magnet when
an electric current flows round the helices from the terminal ends a a", these being
suitably coupled to the interior circuit of the bell itself. The position of the coil C
upon the pillar P is such that the ends thereof form an electro magnet, and the
outer end is screwed or otherwise constructed to secure the gong.
supporting the pillar is preferably a stamping, and so formed that a narrow piece or
arm ó is bent up parallel with said core, this piece or arm 6 having knife edged
notches in it, upon which is hung an armature B, shaped so as to be capable of
closing the magnetic circuit of the electro magnet formed by the pillar P.
The base A
In order to place the armature B in its position upon the arm b, the latter is bent
aside, its structural connection with the base A admitting of this, and the armature B
is then passed over said arm 6 so that the holes therein coincide with the knife
edges on b, and said arm b is then bent back to its normal position, and the
armature B is then in place relatively to the poles of the electro magnet formed by
the pillar P and the coil C.
Attached to the armature B is a rod or strip R having an indicator disc or flag D
at its end, the whole forming a pendulum whose centre of oscillation is upon
the aforesaid knife edges, the flag or disc D projecting below the gong of the bell.
The coil ends a a¹ of the C are preferably connected across the terminals of the
bell, or may be connected if desired in series with the bell coils.
Thus when a current is flowing through the coils of the electro magnet and
interior circuit of the bell itself, the electro magnet of the indicator consisting in
the pillar P is vitalised, and the armature B is attracted and there held until the
current is stopped, when said armature is released and the pendulum carrying the
disc D is set into oscillation, which continues for a sufficient length of time to
indicate that the bell has been rung.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
First. The combination of parts forming a composite electric bell and indicator
substantially as described and shown.
;
Second. In an electric bell, the combination of a gong pillar P, with a coil of
insulated wire C, and a suspended armature B carrying a pendulum and disc D
constructed and operated substantially as and for the purposes herein described with
reference to the drawings.
Dated this with day of October 1905
i.
FREDK. WALKER,
Fellow of the Society of Patent Agents,
88 Queen Victoria Street, London, E.C., Agent for the Applicants.