Improved Method of Fixing Electric Call Bells.
Year: 1894

page_text: Date of Application, 13th Feb., 1894
Complete Specification Left, 13th Oct., 1894-Accepted, 17th Nov., 1894
PROVISIONAL SPECIFICATION.
Improved Method of Fixing Electric Call Bells.
We WILLIAM PAUL THEERMANN of 11 Great Ducie Street Manchester,
Electrician WALTER CROOKELL of 135 Broughton Road Salford Mechanic,
GEORGE CHRISTOPHER ELLIOTT of 27 Boardman Street Eccles, Gentleman
all in the County of Lancashire, do hereby declare the nature of this invention to
be as follows:-
This improvement relates to a new method of fixing electric call bells, by which
an ordinary trembling bell is made into a continuous action bell for calling servants
or for other purposes. To do this we employ a suitable bell, a battery and two
2-way switches.
The bell, battery and one of the said switches are fixed, say in servant's bed
room and the other switch in a room from where the call is to be made.
The connections are as follows:
Each of the two terminal contacts of the one switch are connected by wires to
the two terminal contacts of the other. The pillar of one switch lever is connected
to one terminal of the hell and the pillar of the other switch lever to one pole of
the battery, the second pole of the battery is connected to the second terminal of
the bell to complete the circuit.
Now if one switch lever is moved onto one contact the circuit is closed and the
bell will ring and continue doing so until the lever of the other switch is moved
to the opposite terminal (when the circuit is broken) and if the lever of the first
switch is moved again to the first contact the bell will continue to ring again until
the lever on the second switch is moved to the first terminal and vice versa; and
by this means the switch in the room from where the call to be made is always
ready for use.
The two terminal contacts on the two said switches are brought near enough so
that the levers are always in contact with either one or the other of the said
terminals.
Dad L
.
n
1001
W. P. THEERMANN,
WALTER CROOKELL,
GEORGE CH. ELLIOTT,
Applicants.
COMPLETE SPECIFICATION.
Improved Method of Fixing Electric Call Bells.
We WILLIAM PAUL THEERMANN, 11 Great Ducie Street, Manchester,
Electrical Engineer, WALTER CROOKELL, 135 Broughton Road, Salford,
Mechanic, and GEORGE CHRISTOPHER ELLIOTT, 44 (late 27) Boardman Street,
Eccles, Gentleman, all in the County of Lancashire, do hereby declare the nature
of this invention and in what manner the saine is to be performed to be particularly
described and ascertained in and by the following statement :-
Our invention relates to an improved method of arranging the circuits and
switches of continuous electric bells and in order to make the same clearly
understood we will describe it with reference to the accompanying drawing.
in

page_text: In the drawing A is an ordinary electric bell provided with terminals ab to
which are attached conducting wires B and C C¹.
One of the wires B is in constant communication with one of the poles of a
battery D. The other wire C C' may be made to communicate with the other
pole of the battery when it is desired to ring the bell. Near the bell is a
switch E provided with terminals e¹ e2 from which extend conducting wires c³ ³
communicating respectively with terminals f¹ f2 of another switch F placed at
the position whence the bell is required to be rung.
The ends of the wires C Cmake metallic contact with the arms or levers es
and respectively of the switches E and F.
As will be seen from the drawing when the switches are placed in the positions
shown there is not a complete circuit from C¹ to C and the bell will not ring until
the arm of the switch F is switched over so as to make contact with its other
terminal whereupon the bell will ring and will continue to do so until the
switch E is reversed when the circuit will be broken again.
In order to ring the bell again from the switch F the position of the lever f³ is
reversed. The make and break positions of the ringing switch thus alternate with
each other after each use of the bell. The same alternation takes place at the
switch E.
The chief advantage of such a combination is that the movement of the switch
near the bell for putting the bell out of action has the effect of setting the parts so
that the bell can immediately be rung again from the ringing switch by simple
reversal and the person desiring to ring may do so as often as may be required.
The battery the electric bell and the construction of the switches may be varied
as desired as these of themselves do not constitute our said invention.
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,―
The arrangement and combination with an electric bell of alternating switches
and connecting wires substantially as and for the purpose hereinbefore described
and shown with reference to the accompanying drawing.
Dated this 12th day of October 1894.
E. T. WHITELOW, A.M. Inst. C.E.,
70, Deansgate, Manchester, Agent for the Applicants.