Improvements in and relating to Electrical Signalling Apparatus or Bells.
Year: 1896

page_text: Date of Application, 24th July, 1896
Complete Specification Left, 17th Oct., 1896--Accepted, 21st Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Electrical Signalling Apparatus
or Bells.
We SAMUEL JEVONS of The Minories Birmingham in the County of Warwick
Electrical Engineer and WILLIAM COLLINS of 138 St. Paul's Road Balsall
Heath also Electrical Engineer, do hereby declare the nature of our said invention
to be as follows:-
Our invention has for its object improvements in and relating to electrical
signalling apparatus or bells by which we are enabled to indicate by sounds various
rooms or positions from which the indication was caused without going to the
indicator register for the purpose which is a great convenience as it saves con-
siderable trouble and expedites communications without complication we will now
explain our improved apparatus or arrangements :-
In the ordinary bell the arinature carrying the hammer is attracted on one side
only by its electro magnet and therefore can only give one type of sound or signal
but I add a second electro magnet on the opposite side of the armature with its
additional contact spring and gong and hammer enabling two signals or distinct
sounds to be produced by the use of circuits on either side through press pushes
in the usual manner and by the employment of a double acting push ringing both
gongs simultaneously we obtain a third distinct sound or signal. It is immaterial
to the principle of this bell whether the armature is pivotted at the end or the
centre and whether the coils are placed on opposite sides or both on the same side
of the armature or whether the shape of the armature is made to embrace the
coils or otherwise to effect the double action on the gongs. Its normal arrange-
ment is a triple signal bell as with both coils connected up, but in making use of
this bell for ordinary signalling the circuit may be completed through either one
or both coils.
Our invention admits of an arrangement of electric bells by which we can
indicate by sounds alone different rooms within certain limits. For instance :-
Assuming the two bells to five different & distinct sounds, we can connect a push
to one magnet or the other, or to both together, which would therefore give three
distinct indications. Then by having a special push which gives two contacts, but
which we do not claim in itself we can multiply the distinctions of sound indica-
tions still further by the two bells as explained. It is however the means for the
production of the first three differences explained which constitutes the special
feature of our invention. We are aware that an alternating current has been used
with two bells but no variation of sounds have been so produced as is possible by
our invention aforesaid.
ديمه
T. 1906
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Electrical Signalling Apparatus.
or Bells.
We, SAMUEL JEVONS of The Minories, Birmingham, in the County of
Warwick, Electrical Engineer, and WILLIAM COLLINS of 138 St. Paul's
Road, Balsall Heath, Birmingham, aforesaid, also Electrical Engineer, do hereby
declare the nature of our said invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
Our invention has for its object improvements in or relating to electrical
signalling apparatus or bells by which we are enabled to indicate by distinctly
different sounds, and by means of one apparatus, various rooms or positions from
which the indication is made without the necessity of going to the indicator
register for the purpose, and which is absolutely necessary with the present
apparatus. We thus greatly expedite communications without complication.
In order that our invention may be clearly understood and more easily carried
into practical effect we have appended hereunto two double-sized sheets of
drawings upon one of which we have given an example of our apparatus in a
compact form, and upon the other a diagram shewing one mode of connections for
the said apparatus as well as examples of such pushes as may be used to answer
the purpose.
Figure 1 is a side elevation of our improved signalling apparatus attached to
the usual bell board E.
Figure 2 is a side elevation of the same apparatus as is shown at Figure 1.
Figure 3 is a diagram view shewing one arrangement of the connections between
the battery and the signalling apparatus and the bell pushes.
Figure 4 is a sectional elevation of a bell push by which the two bells or
gongs A and B may be struck simultaneously.
FL
Figure 5 is a similar view to Figure shewing push which will produce two
repeat signals from one bell, or gong so as to multiply the distinct signals to be
obtained from our new apparatus.
In carrying our invention into practise we mount bells or gongs A and B on
the arms c', e, these arms forming part of the common base C and which is fixed
to the bell board E. We then connect one end of the armature R to the tension
spring S the other end of the spring being connected to the projecting block
which also forms part of the base C. The hammer H for striking the bells or
gongs is fastened or mounted to the other end of the armature R in the usual
manner and the contact springs and are also connected to this end of the
armature. Mounted on either side of the armature in the standards or hollowed
blocks c, c are two electro magnets M and M' coiled upon bobbins which are also
connected to the base and through which the electric current passes when
signalling. The contact pillars T and T¹ are mounted respectively on the
arms and 2 and are in contact with the contact springs, that is to say the contact
pillars T with the contact spring and the contact pillar T' with the contact
springs. The bell wires W and W carried to any different parts of any building
or position in which the signalling apparatus is placed are connected respectively
to the terminals T and T3 fixed at say the top of the bell board and the battery
wire W to the return or battery terminal T.
In order to ring the bell or gong A which is of course made so as to produce a
very distinct sound from the bell B we operate the bell push A¹ which brings the
bell wire W into contact with the battery wire W2 and acts upon the electro
magnet M thus attracting the armature on that side and making and breaking the

page_text: contact between the contact spring aud the contact pillar T' by which mean
the hammer is made to repeatedly strike that particular bell or gong. The return
circuit is through the base C.
The bell B is signalled in a similar manner by operating the bell B push the
electric current passing along the bell wire W and operating through the electro
magnet M thus attracting the armature to that side which makes and breaks the
contact between the contact springs and the contact pillar T.
In order to give a double signal the bell push D is operated which brings both
the bell wires W and W' into contact with the battery wire W2 as clearly shewn at
Figure 4 which brings both the electro magnets into action upon the armature
causing it to act alternately on both sides the making and breaking contact between
the contact springs s' and sand the contact pillars T and T' respectively by which
means the hammer is made to strike both bells or gongs A and B repeatedly which
constitutes the third clearly distinguished sound. Further distinguished sounds
may be produced by bell pushes in other parts of the same building on the
principle shewn in section at Figure 5. By this mode we can obtain three more
distinct signals. For instance, when the button or push F is pressed partly down
it brings the bell wire and the battery wire into contact and when it is pressed to
its full extent the wires separate and when the button is released it brings these
wires into contact again as the push returns to its normal position by the action of
the spring f.
We may pivot the armature at the centre and fix the bells or gongs A and B at
each end of the armature and so produce a similar effect. It will be evident that
two different toned gongs or bells may be mounted on separate bases in various
manners and connected up so that the three main distinguishing signals before
mentioned may be obtained from the instalation but the one we have shown as an
example is both compact and cheap in its construction. It will be evident that
the hammer may be made to strike each bell or gong but once instead of a number
of times from one contact as is well known.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
First. The improvements in and relating to electrical signalling apparatus or
bells cousisting essentially of an apparatus with two gongs or bells giving distinct
sounds operated from a battery through two electro magnets acting upon the
armature and connected in such a manner with the pushes in the various rooms or
positions from which the signals are given so as to produce a number of clearly
distinguishable sounds substantially as herein set forth and shewn upon the
drawings.
Second. In connection with two bell or gong electrical apparatus such as
claimed the push D for operating both bells or gongs together so as to produce
one signal substantially as herein set forth and shewn.
Third. In connection with two bell or gong electrical apparatus such as claimed
the push F for producing two repeat signals in the manner substantially as herein
described and shewn on the accompanying drawings.
Dated this 16th day of October 1896.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent.