Improvements in Electric Bells.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Electric Bells.
I CAESAR VOGT, of 30, Spener Strasse, Berlin, Germany, Electrician, do
hereby declare the nature of this invention to be as follows:-
This invention aims at the construction of an alarm that can not only be constructed
very economically, but which shall require very little current, and is arranged as
follows:
A rolled or cast piece forms the bed-plate as well as the flanges, which together
with an insulated iron core form a three-pole magnet in front of which are an
armature and contact-spring as well as a hammer.
A bell is mounted on a seat, which can turn around a screw, and by means of
other screws can be fixed at will, that is to say, this arrangement of the seat
renders it possible to use the same work for every desired size of bell, by simply
moving the seat in a corresponding manner.
The two flanges aforesaid can be replaced by any desired arrangement.
When making or closing the current, the magnetic power lines will penetrate and
concentrated in the core, so that a dispersion of the magnetic power lines, such as
takes place in the two-pole magnets at present in use is impossible.
The armature in the centre of which a magnetic-pole forms at the two ends
two poles in opposite directions, forms the third, instead of the second pole as at
present.
Dated this 1st day of September 1894.
HUGHES, SON & Co.,
38, Chancery Lane, London, Agents for the Applicant.
Improvements in Electric Bells.
1 CAESAR VOGT, of 30, Spener Strasse, Berlin Germany, Electrician, do
hereby declare the nature of this invention, and in what manner the same is to be
performed, to be particularly described in and by the following statement :-
This invention relates to improvement in electric alarums and has for object so
to construct such alarums at a minimum expense, that they shall work most
economically and require but a very weak electrical current. And in order that
this any invention may be fully understood I will describe same with reference to
the accompanying drawing, and the letters of reference marked thereon.
In the first place I form a three pole magnet consisting of a stamped, rolled, or
cast, metal bed plate formed with flanges c c and supporting an insulated iron
core d.
In front of this I have an armature e and contact spring and also the hammer 9.
The bell is mounted on a seating which can turn around the screw k and by
means of the other screws can be fixed in position as required.

page_text: By this arrangement of the seating it is possible to use the same parts for every
desired size of bell by simply moving the seat in a manner corresponding with
requirements.
The two flanges cc' aforesaid can be replaced by any suitable equivalent if so
desired.
The advantages to be derived from the construction of electric alarum above
described are:-
1. When making or closing the current the magnetic power lines will penetrate
and concentrate in the core so that a dispersion of the magnetic power lines such as
takes place in the two pole magnet hitherto in use is impossible.
2. The armature e the centre of which is a magnetic pole forms the third pole
instead of the second pole as hitherto.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improvenients in electric alarums, substantially as and for the purposes
hereinbefore described and shewn in the drawing.
2. In electric alarums the combination and arrangement of three pole magnet,
with armature, contact spring, hammer, and bell mounted upon an adjustable
seating, all constructed and operating substantially as herein before described and
shewn.
Dated this 4th day of June 1895.
HUGHES, SON & Co.,
38, Chancery Lane, W.C., Agents for the Applicant.