An Improved Electric Bell or Gong.
Year: 1889

page_text: Date of Application, 28th Feb., 1889
Complete Specification Left, 28th Nov., 1889-Accepted, 4th Jan., 1890
PROVISIONAL SPECIFICATION.
An Improved Electric Bell or Gong.
I FREDERICK HERBERT BERRY of 18, Percival Street Clerkenwell in the County
of Middlesex Electrician do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to produce a simple cheap and extremely efficient
electric bell or gong.
To carry out this object I mount on a suitable base a coil of insulated wire and at
one end of the framing in which this coil is mounted is secured one end of a thin
sheet of metal which forms a spring and extends along parallel or thereabouts with
the coil the free end thereof touching a contact pillar erected on the base. On the
side of this spring is secured the hammer the end whereof can strike a stud or
projection on the inner side of the bell or gong which in this style covers this whole
apparatus or the hammer can strike any suitable bell or gong in any manner. Two
terminals can be erected on the base from one of which an electrical connection is
made to one end of the coil the other end of the coil being electrically connected with
the spring and the contact pillar is electrically connected with the other terminal.
When therefore an electric current is sent through this apparatus the cheeks of the
coil are magnetized and draw the armature that is to say the hammer and the spring
towards themselves and away from the contact pillar and the hammer strikes the bell
or gong but at the sume time it is obvious that the circuit is broken wherefor the
hammer and the spring are released and the spring again touches the contact pillar
the circuit is restored the hammer and the spring are again as aforesaid drawn towards
the cheeks of the coil and so on in rapid succession the hammer striking the bell or
gong every time as is desired.
COMPLETE SPECIFICATION.
An Improved Electric Bell or Gong.
I FREDERICK HERBERT BERRY of 18 Percival Street Clerkenwell in the county of
Middlesex Electrician 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 :-
The object of this my invention is to produce a simple cheap and yet extremely
effective and efficient electric bell or gong in which while only one electric bobbin and
coil of wire is used the movement of the striking hammer shall be very certain and
rapid.
In order the more clearly to explain this my invention and in what manner the
same is to be performed I refer to the accompanying drawing in which I have shewn
one very convenient form and arrangement of my electric bell or gong whereof
Figure 1 is a plan of the apparatus for striking or sounding the same and Figure 2 is
an elevation of this apparatus in both Figures the bell being shewn in section.
On a suitable base A I erect a convenient frame B of brass or other non-magnetic
material wherein I mount a reel or bobbin C of soft iron or other magnetic material
round which is wound a coil D of insulated wire and at or near one end of this frame B
is secured at the place B¹ one end of a thin strip or bar E of steel or other suitable
conducting material which forms and acts as a spring and extends along the side of
the bobbin C parallel or thereabouts therewith and the free end of this spring bar E
touches a contact pillar F also erected on the base A. On the side of the spring
bar E and preferably between the same and the bobbin C is secured one end of an
D
1

page_text: hammer G at the place G¹ which hammer G also extends along the side of the
bobbin C parallel or thereabouts therewith and the other end the free end of this
hammer G is formed and arranged in such manner as may be necessary to strike the
bell or gong. Preferably as is shewn in the drawing I form a lug or projection H in
the proper position on the inner side of the bell K which the hammer G can strike in
which case this bell K can cover this whole apparatus being mounted on the frame B
and this construction and arrangement as shewn in the drawing is very convenient and
sightly but I do not limit myself thereto for it is obvious that the hammer can be
formed and arranged to strike in any manner any bell or gong mounted or placed in
any position as may be desired in each particular case. Two terminals L are or can
be erected on the base A from one of which terminals L an electrical connection is
made with one end of the coil D of insulated wire the other end whereof is connected
with the spring bar E as shewn at D¹ while the other terminal L' is electrically
connected with the contact pillar F.
When therefore the apparatus is in the position shewn in Figure 1 which is its
normal position and an electric current is sent therethrough the bobbin and the
cheeks or ends thereof are magnetized and are created an electro-magnet which draws
the armature that is to say the hammer G and the spring bar E towards itself and
away from the contact pillar F and the hammer G strikes the bell or gong but at the
same time by this movement of the spring bar E it is obvious that the circuit is broken
wherefor the hammer G and the spring bar E are released and the spring bar E again
touches the contact pillar F when the circuit is restored the hammer and the spring
bar are again drawn towards the electro-magnet and so on in rapid succession the
hammer striking the bell or gong every time the circuit is so restored and broken as
is desired until the electric current is cut off.
As is herein before stated this apparatus is preferably enclosed in and covered by
the bell or gong and mounted on a suitable base and when thus constructed and
arranged this base may be made of any convenient and sightly or ornamental forms
and designs whereof I have shewn a few in the accompanying drawing in which
Figure 3 shews the general arrangement of the apparatus on a base A and
Figures 4. 5. 6 and 7 shew the same as covered by a bell K.
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. In an electric bell or gong the combination with a magnetic bobbin a coil of
insulated wire on the bobbin and a spring bar mounted parallel or thereabouts with
the bobbin and connected with the coil of a contact pillar for the free end of the
spring bar and a striking hammer secured to the spring bar substantially as
herein before described.
2. The combination with a bell or gong K mounted on a base A and provided
with an internal projection H of an hammer G secured to a spring bar E a contact
pillar F and an electro-magnet C by which the spring bar E can be drawn away from
the contact pillar F and the hammer G caused to strike the projection H on the bell
or gong
K substantially as hereinbefore described.
3. The combination with a non-magnetic frame B erected on a base A a magnetic
bobbin C mounted in the frame B a coil D of insulated wire on the bobbin C
and a contact pillar F also erected on the base A of terminals L and L' electrically
connected severally with the coil D and the contact pillar F a spring bar E
electrically connected with the coil D and touching the contact pillar and an
hammer G secured to the spring bar E and capable of striking a bell or gong
substantially as herein before described.
4. The electric bell or gong substantially as hereinbefore described and shewn in
the accompanying drawing.
Dated this 28th day of November 1889.
HART & Co.