Improvements in and in connection with Electric Bells.
Year: 1894

page_text: Date of Application, 1st June, 1894-Accepted, 14th July, 1894
COMPLETE SPECIFICATION.
Improvements in and in connection with Electric Bells.
I FREDERICK WILLIAM GOLBY of 36 Chancery Lane, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention as
communicated to me by Albert Neumann of Heilbronn o/ Neckar, Germany,
Engineer, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to improvements in electric chimes and has for its object
to provide a signal or bell telegraph capable of producing more than one tune.
All bell telegraphs or chimes operated by electricity hitherto, have only been able
to produce one single tune, and owing to this circumstance the variety of signals
which may be given is very small and limited to a moderate number of signals
which differ only by the number of strokes, each number having a certain meaning
agreed upon between the transmitter and the receiver of the signal. If the range
of signals was to be extended by a quick succession of closing and opening the
circuit at short intervals, this would require excessive attention, both by the
transmitter and the receiver, and without such extreme attention mistakes will
unavoidably occur.
By the improved apparatus of this invention these inconveniences are obviated
by providing chimes capable of producing more than one tune.
In the accompanying drawings Figure 1 is a plan view of the apparatus
constructed in accordance with this invention, Figure 2 is a central longitudinal
section through the same and Figure 3 is a diagram shewing the connection of the
currents.
On a bed plate A of insulating material is mounted the metal frame B carrying
the pair of electro magnets M₁ and M' and the double bell CD. The binding
screws K K and K³ serve to connect the apparatus to the battery, the positive
pole of which is connected to the screw K² and the negative pole to the posts K¹
and K³.
On a common plate two keys T1 and T2 are provided which keys allow of
transmitting signals by making the bells sound in a variety of modifications.
If for instance the key T¹ is struck, the current from the battery Z passes to
the post K2, then through the bobbins M' to the binding screw E and through the
contact G and post K to the negative pole of the battery Z. If the key T is
struck, the current passes from the battery Z to the post K2 then through the
bobbins M to the binding screw F and through the contact H to the post K³ and
back to the battery.
It will be obvious then that by striking the key T' the bell C, and by striking
the key T the bell D, will be actuated, and further, that on striking both keys T¹
and T2 at the same time, both bells will simultaneously sound.
The apparatus accordingly is capable of producing three different tunes, and by
combining these three tunes and repeating the same in varying succession, an
ample range of short signals may be given.
Having now particularly, described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Electric chimes capable of producing several tunes characterised by the
arrangement of a double bell C D in combination with a double key T¹ T2 in
such a manner that on otriking the 1 TI
11
1
1

page_text: key T, the hell D, will be made to sound, while on simultaneously striking both
keys T1 and T2 the two bells C and D will sound simultaneously, substantially
as described and illustrated.
Dated this 1st day of June 1894.
F. W. GOLBY,
36, Chancery Lane, London, W.C.