AN ELECTRO-MAGNETIC APPARATUS
Year: 1852

page_text: LETTERS PATENT to John Ignatius Fuchs, Engineer and Watch-
maker, of Zerbst, Dutchy of Anhalt Dessau, for the Invention of
Sealed the 8th January 1853, and dated the 2nd October 1852.
PROVISIONAL SPECIFICATION left by the said John Ignatius
Fuchs at the Office of the Conimissioners of Patents, with his
Petition, on the 2nd October 1852.
I, JOHN IGNATIUS FUCHS, Engineer & Watchmaker, of Zerlest,
Dutchy of Anhalt Dessau, do hereby declare the nature of the said
Invention for "AN ELECTRO-MAGNETIC APPARATUS" to be as follows:-
This Invention has for its object arranging an electro-magnetic
apparatus for alarums and other like uses, wherein the apparatus, so
long as a battery is in operation and in connection with the wires
composing the circuit, will constantly by its own action make & break
the circuit, and by a hammer or other instrument act on a bell or
other surface.
The Invention consists of producing repeated oscillations by means
of a lever so arranged as to break the electric current when acted upon

page_text: by an electro-magnet, and to complete it again when the action of the
electro-magnet has been stopped, so as to cause the action again to take
place; and for arranging apparatus in connection therewith for giving
alarm or notice at a distance, when two surfaces previously in contact
have been separated, such as the opening of a door or window.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Ignatius Fuchs in the Great Seal Patent
Office, on the 31st March 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I
JOHN IGNATIUS FUCHS, Engineer and Watchmaker, of Zerbst, Dutchy
of Anhalt Dessan, send greeting.
WHEREAS 1er most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of October, in the year of
our Lord One thousand eight hundred and fifty-two, in the sixteenth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Ignatius Fuchs, Her special licence
that I, the said John Ignatius l'uchs, my executors, administrators,
and assigns, or such others as I, the said John Ignatius Fuchs, my
executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "AN
ELECTRO-MAGNETIC APPARATUS," upon the condition (amongst others)
that I, the said John Ignatius Fuchs, by an instrument in writing
under my hand and seal, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said John Ignatius Fuchs, do
hereby declare the nature of the said Invention, and in what manner

page_text: the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof (that is to say):
My Invention has for its object arranging electro magnetic apparatus
for alarums and other like uses, wherein the apparatus (so long as a
battery is in operation and in connection with the wires composing the
circuit) will constantly by its own action make and break the circuit,
and by a hammer or other instrument act on a bell or other surface.
The Invention consists of producing repeated oscillation by means of a
lever so arranged as to break the electric current when acted on by an
electro magnet, and to completo it again when the action of the electro
magnet has been stopped, so as to cause the action again to take place;
and for arranging apparatus in connection therewith for giving alarm
or notice at a distance, when the two surfaces previously in contact have
been separated, such as by the opening a door or window. And in
order that
my
said Invention, and the manner of porforming the same,
may be most fully understood and readily carried into effect I will
proceed to describe the means pursued by me.
DESCRIPTION OF THE DRAWING.
Figure 1, is an elevation of the electro magnetic apparatus arranged
according to my Invention; Figure 2, shows a plan thereof, with
connections with the other parts of my apparatus which are shown in
Figures 3, and 4. In each of these l'igures the same letters are used
to indicate the same parts. B, B, is an electro magnet; y, y, are metal
studs for receiving the ends of the wire, from which proceed other wires
to the poles of the battery in order to produce a circuit, within which
circuit apparatus may be introduced, as hereafter explained. II, is
a lever, having towards one end a plate or armature 1), fixed thereon
over the clectro magnet B, so that when an electric current is passing
in the wire coiled on the electro maguet 13, the armature or plate D),
will be attracted, and the hammer N, at the end of the lever will be
caused to strike on the bell. Towards the other end of the lever II, is
affixed a spring E, having a tendency at all times to draw down that
end of the lever; but when the electro magnet attracts its armature D,
the spring will be overcome, and that end of the lever will rise; and in

page_text: order to prevent the spring E, moving the end of the lever too far there
is a set screw c, which, coming against a stop fixed below it, prevents
that end of the lever being further drawn down. f, is a spring blade or
plate under which the end of the lever II, comes, as is shown in the
Drawing. This spring plate or blade rests, (by means of a stud or point
passing through it,) on the plate, which plate is in connection by the
wire with one of the poles of the battery, and the spring f, is in con-
nection by the wire with the other pole, by which combination of parts
it will be evident that each time the electro magnet attracts its arma-
ture or keeper D, the circuit will be broken by the lever II, lifting the
spring plate f, out of contact with the plate a, and the spring E, will
then come into action and draw down its end of the lever II, by which
the plates f, x, will be allowed to come into contact again, and thus
once more complete the electric circuit, when the electro magnet will
again act and break the circuit, and this action will connnence immedi-
ately that the circuit is made complete in that part which is exterior
of the instrument, and a person near will at once know the fact
that the circuit has been made by reason of the alarum apparatus
commencing to sound. Hence it will be readily understood that if
the circuit at any part be made up by two surfaces of metal capa-
ble of being brought into contact, the act of bringing those parts into
contact will be the cause of the electro magnetic apparatus commencing
to act. An apparatus to effect this is shown at Figures 3, and 4; the
two metal plates K, and P, completing the circuit on coming in contact;
and they are so arranged as always to have a tendancy to spring to-
gether and complete the circuit. If, then, this apparatus is so placed
that part of a door or window, when closed, presses upon the pro-
jecting point of the plate K, it will be evident that when this pressure
is removed by the opening of the door or window, the circuit will be
instantly completed and the signal caused to sound.
It will be evident that, if desired, a means of readily detaching the
battery from the instrument, and thus putting the apparatus out of
action, when required, may be attached. It is also evident that my
apparatus may be applied to a great number of uses, where notice of
the removal or alteration in the position of any body is desired to be
communicated,

page_text: IIaving thus described the nature of my Invention, and the manner
of performing the same, I would have it understood that I do not
confine myself to the precise details herein shown and described, so long
as the peculiar character of my Invention be retained; but whit 1 claim
is, the combination or arrangement of apparatus herein described.
In witness whereof, I, the said John Ignatius Fuchs, have
hereunto set my hand and seal, this Twenty-first day of
March, in the year of our Lord One thousand eight hundred
and fifty-three.
0
Witness,
MCE SAUTTEE,
2, Ruc Drouot,
Paris.
J. I. FUEHS. (L.S.)