An Electric Bell Repeater, applicable as an Electric Bell and Receiver for Electric Signals.
Year: 1891

page_text: Date of Application, 17th Jan., 1891
Complete Specification Left, 22nd Apr., 1891-Accepted, 23rd May, 1891
PROVISIONAL SPECIFICATION.
An Electric Bell Repeater, applicable as an Electric Bell and
Receiver for Electric Signals.
I ARTHUR HENRY BAGNOLD Captain in H.M.'s Corps of Royal Engineers
and a Brevet Major quartered at Chatham and residing at Borstal Cottage
Rochester in the County of Kent do hereby declare the nature of this invention
to be as follows:-
An electro magnet is arranged so that lines of force issuing therefrom pass
through the sound-bow of a gong or bell made of iron steel or of other magnetic
metal. The coils of the electro magnet are placed in the bell circuit.
Whenever this circuit is broken the gong or bell is set into vibration giving out
clear and distinct rings suitable for repeating the rings of an ordinary chattering
electric bell or for repeating the action of any other description of electrical make
and break apparatus, thus acting also as an electric bell and as a receiver for electric
signals.
The L
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1001
ARTHUR HENRY BAGNOLD,
Capt. R. Engineers, and Major, Borstal Cottage, Rochester.
COMPLETE SPECIFICATION.
An Electric Bell Repeater, applicable as an Electric Bell and
Receiver for Electric Signals.
I, ARTHUR HENRY BAGNOLD, Captain in H.M.'s Corps of Royal Engineers,
and Brevet Major quartered at Chatham, residing at Borstal Cottage, Rochester,
in the County of Kent, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
My invention relates to the construction of electric bell apparatus, wherein a
bell or gong made of iron or steel is arranged with its sound bow near the poles of
an electro magnet having its coils in the signalling circuit so that when the circuit
is intermittently closed and opened the bell or gong is caused to sound.
Fig. 1 of the accompanying drawings is a section and Fig. 2 is a front view with
the bell removed of apparatus according to my invention arranged in combination
with a contact maker of the kind described in my Specification No. 12352 of 1890.
A central column A stands up from a base B of insulating material on which are
fixed metallic plates C. D. F with screws for clamping conducting wires. To the
column A. is fixed an electro magnet E with its poles presented towards the sound
bow or edge of a steel bell G which is fixed on the column A by a nut H. To a
bracket projecting up from the plate D is fixed the end of an elastic rod R which
passes freely through a hole of the column A and through a hole larger than itself
in a bracket projecting up from the plate F. The one conductor K of the circuit
is connected to the plate C to which is also connected the one end of the electro
magnet coil. The other end of the coil is connected to the plate F, and the other
conductor L of the circuit is connected to the plate D.
On applying the fingers to a knob M at the end of the rod R and moving the
button to and fro so that the rod touches the side of the hole in the bracket of
the plate F, the coil of the electro magnet E is intermittently brought into circuit,
and the bell G is acted on by the magnet so as to ring. Although I have

page_text: described and shewn in the drawing a contact maker consisting of the elastic
rod R operating in combination with the conducting plates D and F as described
in my former Specification. No., 12352. of 1890,, the intermittent excitement of the
electro magnet E may obviously be effected by any other intermitting contact
maker, either at the magnet itself or at a distance.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
An electric bell apparatus consisting of a bell or gong of magnetic metal
arranged with its sound bow in proximity to the pole of an intermittently excited
electro magnet, substantially as described.
Dated this 22nd dowe of Anvil 1901
ABEL & IMRAY,
Agents for the Applicant.