Improvements in Electric Bells.
Year: 1896

page_text: Date of Application, 3rd Oct., 1896-Accepted, 5th Dec., 1896
Improvements in Electric Bells.
I, JOSEF MOHR, of Hassfurt-on-the-Main, in the Empire of Germany, Solicitor
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 consists of certain improvements in electric bells by means of
which any number of bells can be operated by means of one circuit breaker
thereby obviating, the unpleasant rattling of the circuit breaker as at present
generally noticeable. The invention further embraces means for sounding a bell
without a hammer, thus producing a very clear pure tone..
And in order to render the present specification more easily intelligible reference
is had to the accompanying drawing in which similar letters denote similar parts
throughout the several views :-
Fig. 1 is a plan of an ordinary electric bell having a hammer but no circuit
breakor.
Fig. 2 is a sectional elevation of an electric bell having a moveable bell adapted
to be operated to and from a stationary hammer;
Fig. 3 is a sectional elevation of a bell, having no hammer ;
Fig. 4 is a plan of Fig. 3;
Fig. 5 is a diagram showing the operation of the bell shown in Figs. 3 and 4;
Fig. 6 is a diagram showing the arrangement of several bells operated from one
circuit breaker, and
Fig. 7 is a diagram showing the arrangement of bells and keys to operate
same.
Fig. 1 merely shows an ordinary electric bell without a circuit breaker, several
of which may be arranged in the circuits all operated by one breaker as hereinafter
more particularly described.
In Fig. 2 a bell a is suspended on a spring 6 suitably supported, and operated
by the electric current to and fro between a stationary hammer c. and a striker
pin d. According to Figs. 3 and 4 the bell a', preferably of steel, is mounted
stationary and underneath the same are arranged two horse shoe magnets, c¹. The
operation of this bell takes place in the following manner :-
Referring to Fig. 5-the bell is indicated by the full line, and if the elastic
mantle of the bell is compressed by any exterior influence into the position shown
by the dot and dash ellipse and then released, it will spring to the position shown by
the dotted line ellipse and vibrate, thus ringing in a very clear pure tone. Thus
if the current passes through the electro-magnets c', the run of the bell will be
attracted and released alternately at two diametrically opposite points, thus
vibrating and producing a clear continuous ring. In Fig. 6 the arrangement of
several bells, of the kind shown in Figs. 1, 2 or 3, operated by one circuit breaker
is shown. The battery is connected to the bell over the button I and to h¹ over
the button II, and conductors pass from each bell back to the opposite pole of the
battery over the common circuit breaker g. Obviously on depressing button I
the bell h, and on depressing button II the bell will sound. Fig. 7 shows
the arrangement of a series of bells with keys; said bells would of course
have to be properly tuned and must be connected up in the way shown in
Fig. 6.

page_text: In order to prevent any noise. whatever being made by the single circuit
breaker employed, the same may be provided with a mercury contact, consisting
of a platinum pin which dips in the mercury at the top of which a little vinous
spirit is arranged in the well known manner.
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 :-
1. The combination of a series of electric bells having no circuit breakers, a
battery to operate said bells and a single circuit breaker, electric conductors from
each bell to. one pole of the battery and from each bell to the common circuit
breaker and a. conductor from the latter to the other pole of said battery,
substantially as described and set forth...
2. The combination of a series of electric bells each having a stationary bell
and a double horse shoe magnet mounted thereunder, a battery to operate said
bells and a single circuit breaker, electric conductors from each bell. to one, pole
of the battery and from. each bell to the common circuit breaker and a
conductor from the latter to the other pole of said battery, substantially as
described and set forth. :
3. The combination of a series of electric bells having moveable bells and
stationary hammers, a battery to operate said bells and a single circuit breaker,
electric conductors from each bell to one pole of the battery and from each bell to
the common circuit breaker and a conductor from the latter to the other pole of
said battery substantially as described and set forth:
this 3rd day of
1896
S. S. BROMHEAD,
97, Newgate Street, London, Patent Agent.