Improvements in and relating to Electric Alarm and Registering Apparatus.
Year: 1897

page_text: Date of Application, 16th Aug., 1897-Accepted, 13th Aug., 1898.
[Communicated from abroad by MAX VESTER, of 24, Schenkendorfstrasse, Leipzig,
in the Empire of Germany, Merchant.]
Improvements in and relating to Electric Alarm and Registering
Apparatus.
I, CHARLES JUNGE, of Lincoln Chambers, 75, Chancery Lane, London, W.C.,
Consulting Engineer, 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 : —
This invention relates to alarm and registering apparatus, and has for its object
to solve the problem of giving alarms from a central station to a number of
receiver stations either singly or simultaneously under complete control, so that at
the commencement of the alarm and also on the interruption of the same at a
receiver station a registration of the corresponding moment takes place, and that
after the closing of the alarm circuit the regular operation of the apparatus may
at any time be ascertained from the central station.
The apparatus employed for the solution of the problem herein before stated is
represented diagrammatically in the accompanying drawings.
Figures 1 to 3 show the arrangement of the circuits with regard to three
different positions of the contact, or armature, whilst
Figures 4 to 7 are views shewing the device which serves for simultaneously
operating all the switches in the alarm circuit.
The lower portion of Figures 1 to 3 represents the central station, and the upper
portion the receiver station. The first mentioned may for instance be the waiting
or servant room of an hotel, and the last-mentioned station may be one of the
rooms of same hotel.
In the alarm circuit II, III, which is closed through the bell push button A at
the central station, are included three electromagnets E E2 and E³. One electro-
magnet E, when the circuit is closed, actuates a needle hammer h forming also an
armature and adapted to effect, both on the closing and on the interruption of the
alarm circuit, the registration of the corresponding moment upon a moving strip
of paper s appertaining to a device to be hereinafter referred to. The other electro-
magnet Es included in the alarm circuit acts by its armature upon a diaphragm p
which through the vibrations of the bell armature (Wagner's hammer) is caused
to sound.
•
The alarm circuit II III is interrupted by the aroused sleeper by means of a
cut out key B provided, at the receiver station, a control circuit I II V being closed
at the same time. In the said control circuit I II V is included the same register-
ing electromagnet E which was previously in the alarm circuit, said electromagnet
effecting now a second registration of the needle hammer h. There is moreover
provided a second electromagnet E' in the control circuit which has for its object to
give a visible return signal by acting upon the signalling plate o which it causes
to fall and to appear in front of an opening.

page_text: To further explain the arrangement and action of the aforesaid circuits I give
the following summary ;-
(a) (Figure 1) position of rest, no current.
(B) (Figure 2) depressing the push button A at the central station.
1st. Registration ringing bell, acoustic signal.
Making contact at a. Source of electricity S, conductor I, contact a, con-
ductor II, electromagnet E, conductor II, key B, stop lever C, Wagner's hammer,
electromagnet E², conductor III, electromagnet E³, conductor III, source of elec
tricity.S.
(y) (Fig. 3) First, releasing the push button A at the central station.
Continued ringing and acoustic signal.
Breaking contact at a, making contact at a¹.
Fresh circuit: source of electricity S, conductor I, conductor IV, contact c¹, stop
lever C, Wagner's hammer, electromagnet E2, conductor III, electromagnet 1,
source of electricity S.
(8) (Figure 3) Second, operating the key B by the aroused sleeper, as indicated.
Interruption of ringing 2nd registration and visible signal.
Making contact at b, breaking contact at c¹.
Fresh circuit; source of electricity S, conductor I, contact b, conductor II,
electromagnet E, conductor II, contact a¹ conductor V, electromagnet E¹, con-
ductor V, source of electricity S, releasing key B, breaking contact at b, locking
Wagner's hammer by the stop lever C mechanically, position of rest.
Figs. 1 and 3 show the locking of the armature of the bell mechanism by the
arm of the locking lever C, said armature being kept locked untill the contact a at
the central station is made, where upon a current flows through the electromag-
nets E of the bell mechanism, causing the armature of the bell to be attracted
despite the locking lever C, which is pulled by its spring to the position shown
in Fig. 2, thereby closing a fresh circuit by making the contact c₁, so that, even
on release of the press button at the central office, the operation of the bell
mechanism continues uninterruptedly.
Only when the locking lever C is moved back again to its locking position by
the person called with the aid of the key B, that is to say, when the contact c¹ is
broken, the current will cease to flow through the electromagnets E2 of the bell
mechanism and the locking lever can therefore maintain the locking of the bell
armature. The position shown in Fig. 1 of the drawings thus represents the
position of rest of the whole arrangement in which no current will flow.
As shewn in Figures 1 to 3, the device used for the registrations of the needle
hammer h consists of a drum t provided with flutes, which moves a strip of paper s.
For this purpose the drum is set in motion by a clockwork (not shown) provided
at the central station. The moving strip s is unwound from the roller t¹ and
is wound upon the roller pressing against the drum t. The two rollers are
connected by a bar, and the tension of the strip s is regulated by a spiral spring t³.
The flutes on the drum t are designed for enabling the registering needle to per-
forate the strip s. For each of the receiver stations there is of course a needle
hammer and a longitudinal column upon the strip of paper. The arrangement
of the transverse columns upon the said strip or the division of time depends on
the rotary velocity of the drum t.
A device represented to Figures 4 to 7, which also forms part of the present inven-
tion, is designed to serve for simultaneously operating all the bell push buttons A
(for instance in case of fire). I provide for this purpose a plate P which covers
the buttons and which may usually be hung up at a suitable place in the waiting
room of the central station. To give an alarm it is only necessary to push the
plate P downwards, said plate working on guide pins f arranged on the push
button tablet. On the two sides are arranged the levers H connected by a link
with the wall. By means of these levers H it is easy to operate the plate P
furnished with projecting pins e, and also the push buttons. In its depressed
position the plate is secured by spring actuated pawls k (Figure 7) which engage

page_text: automatically, thereby ensuring a continuous ringing of all the bells, but preclud-
ing their release by the aid of the keys B. The alarm circuit will always remain
closed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is;
First. An alarm and registering apparatus characterized by the features that
in the alarm circuit II III, which is closed by the push button A at the central
station, are included an electromagnet E actuating a needle hammer h for register-
ing purposes, and a second electromagnet E³, the armature of which causes a
diaphragm p to sound, and that in the control circuit I II V, which is closed on
the interruption of the alarm circuit by the aroused sleeper by means of a cut-out
key B, is included the same registering electromagnet E placed in the alarm circuit
and moreover an electromagnet E' actuating the visible return signal (plate o),
substantially as set forth.
Second. In the alarm and registering apparatus described in the first claim a
device serving for the registrations of the needle hammer, characterized by a
drum t set in rotation by a clockwork and provided with flutes, said drum moving
a strip of paper s which is wound from and on tension rollers 2 and is furnished
with a division of time, substantially as set forth.
Third. In the alarm and registering apparatus described in the first claim a
device for simultaneously operating all the bell push buttons A, characterized by a
movable plate P covering the push buttons and adapted to be operated by means
of one or more levers H, being held in its lowest position by spring actuated pawls h
which engage automatically, thereby ensuring the sounding of all the bells, but
precluding release by means of the keys B, substantially as set forth.
Dated this 16th day of August 1897