A New or Improved Electrical Apparatus for Calling or Waking Persons in Different Rooms at Different Determined Times.
Year: 1894

page_text: Date of Application, 21th July, 1894-Accepted, 25th Aug., 1894
COMPLETE SPECIFICATION.
A New or Improved Electrical Apparatus for Calling or Waking
Persons in Different Rooms at Different Determined Times.
I, WALTHER WILKE, of Wermelskirchen, in the Empire of Germany, Merchant,
do hereby declare the nature of this invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement, and accompanying drawing, that is to say :-
The apparatus which forms the subject of the present invention, is intended to
take the place of the night watchman ordinarily employed to wake persons sleeping
in different rooms in hotels and other places of the like kind, the improved
apparatus operating by means of electric bells.
The accompanying drawing is in illustration of my invention.
Figure 1 is a front view of the apparatus. An ordinary clock is provided
having a dial divided into hours and quarters. These divisions correspond with
the ends of forty-eight electrical conducting wires, which pass through the dial
from the back, and are then bent down radially, flat against the dial, as shewn
at P1, Figure 5, which shews the dial in section. H', Figure 1, shews a com-
bination of two strips of wood, in which the conducting wires are held, and upon
which are marked the different times corresponding with the different wires, these
times being one o'clock, a quarter past one, half past one, a quarter to two,
two o'clock, a quarter past two, and so on. The metallic wires end in hooks.
Figure 2 shews a similar combination of strips, and Figure 3 a side view of these
strips, through which the wires pass, and are led to the different bed-rooms, the
several numbers of which are marked upon the strips. These wires also terminate
in hooks.
Figure 4 shews in end view from above, the method of uniting together and
carrying the strips (shewn at H²).
Figure 6 represents an electrical battery of any suitable kind, the positive
current of which passes by the wire P to the clock, and by P¹ to the electrical
bell g', Figure 8, of room No. 1, whence it returns to the negative pole of the
battery by the conducting wire P
Figure 7 shews a length of insulated metallic conducting wire, D, having at its
ends un-insulated eyes, or loops, and serving to make electrical communication
hetween the conducting wires of H', Figure 1, and those of H', Figure 2. In the
drawing, communication is shewn, by way of illustration, made for one o'clock
with the six bedrooms, Number 9, No. 11, No. 20, No. 22, No. 35, and No. 39, and
for half-past one o'clock with No. 1, and so on. To establish these communications,
it is only necessary to hook the ends of the conducting wire into the proper hooks,
cn H' and H².
The small hand k, Figure 5, is mounted by means of a conical socket b upon a
hollow axle w. Between w and b is fitted an insulating piece i. The conducting
wire P is always kept in contact with the socket b, so that the hand k is always
in communication with the positive pole of the battery, and upon its inner surface
is soldered or fixed a spring f which exerts a light pressure upon the ends of the
conducting wires, which pass through the dial z, Figure 1, as it moves over them.
As soon as the spring f comes in contact with one of the conducting wires, the
electrical circuit is completed, if there exists no break or interruption between H¹
and H.
The springfis shewn touching the end of the conducting wire, exactly at half
past one, and the bell g¹ in room No. 1, which is shewn in the drawing, will
instantly begin to ring. As the electricity cannot pass to w, Figure 5, the

page_text: arbor 8,
by it.
the large hand
9,
and the interior movement of the clock, are not traversed
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 electrical apparatus for calling or waking persons in different rooms at
different determined times, consisting of the combination of the hour hand k of a
clock, and the spring f, which constitute, together with the insulator i, a device
operating regularly in an electrical circuit, of which it forms part, so as to make
and break at regular or irregular intervals of time, communication through an
electric battery, with bells in any number of rooms, by means of the movement of
the spring over the ends of the conducting wires, which correspond with the
required divisions of the several hours, in combination with the separate conducting
wires D, Figure 7, by which at the exact time required, the conducting wire
corresponding with such time can be electrically connected with the bells in any
one or more of the rooms, substantially as described and illustrated.
Dated this 24th day of July 1894.
EDWARDS & Co.,
65 & 66, Chancery Lane, London, Agents for the Applicant.