Improved Announcing and Recording Apparatus, applicable to Telephones.
Year: 1898

page_text: Date of Application, 4th Feb., 1898-Accepted, 5th Mar., 1898
COMPLETE SPECIFICATION.
Improved Announcing and Recording Apparatus, applicable to
Telephones.
I, FRIEDRICH BERNHARD GBÜNERT, of No. 8, Zollner Strasse, Chemnitz, in the
Kingdom of Saxony and German Empire, 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:-
-
The present invention relates to an announcing apparatus for telephone con-
nections. The apparatus has the object of enabling any caller at times when no
one is present at the telephone called upon to indicate that his call has not been
attended to and denote his number. The person called is then in a position,
after his return, himself to obtain the connection and inform himself of the wishes
of the caller. The novel apparatus may be easily interposed in every telephone
station already existing without rendering necessary for this purpose alterations
of any kind to the telephone itself. The announcing apparatus is illustrated
diagrammatically in the accompanying drawing.
Figure 1 shows an elevation of the apparatus.
Figure 2 is the corresponding plan.
Upon a bedplate a rests on the supports 6 a roller c which carries the paper
strip d. A gear wheel e is attached to the roller c, and the gearing of a clock spring
box capable of being wound up in the usual manner connects with the said
wheel e.
The spring box f is supported revolubly in the frame h. There is
moreover a pallet wheel i attached to the roller c in which wheel engages the
pallet of a double lever k movable on a pivot fixed in the frame h. The arm k
is controlled by a spring k¹ and its end opposite to the pallet is constructed as the
armature of an electromagnet m. This electromagnet is secured upon the bed-
plate a and is interpolated in the signal ourrent circuit. Consequently the
armature is attracted at every current connection, and thereby the pallet ¹ drawn
up so that the spring box f can act, to cause the roller c to revolve in the direction
shown by the arrows. The paper strip d is carried over guide rollers d¹d and
weighted at its free end by means of a gripping weight g so that the strip
released by the turning of the roller is always drawn tight. From the double
arm there proceeds a suitably bent arm n carrying a marker o. At each
attraction of the electromagnet armature the marker o will obviously make an
impression upon the paper strip so that the caller is enabled to indicate his number
to the person called. For instance he may indicate the number 342 thus:-
.
--
To prevent the announcing apparatus acting when anyone is attending to the
telephone it is only requisite to provide a stop lever p which is released when the
office or telephone box is vacated, but which otherwise prevents the roller c from
turning, and consequently the action of the spring. As long as the bolt p holds
the wheel the double lever k and marker o are actuated but the impression
always comes upon the same point of the paper strip. In place of the stopping
mechanism a simple shunt could also be provided by means of which the attendant
on leaving the telephone room interpolates the announcing, apparatus in place of

page_text: the bell signal; or a special current circuit for the announcing apparatus may be
provided which can be closed by means of a contact interpolated in the signal
circuit. By the breaking of this contact the announcing apparatus would then be
easily cut out. In place of the impressions of the colourless marker coloured
impressions could obviously also be employed without thereby in any way altering
the principle of the present invention. The spring box could also obviously be
replaced by a weight. Finally, the spring box or weight instead of acting upon
the paper roll might act upon two carrying rolls as well known in telegraphy.
The announcing apparatus is provided with a suitable cover out of which the
paper strip d passes immediately behind the marker in such a manner that the
impressions or marks can at all times be conveniently examined. The paper strip
is from time to time torn off and the grip weight 9 again hung on near to the
roller d¹.
Having now particularly described and ascertained the nature of my said. in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:-
´1. An announcing apparatus for telephone connections characterised by having an
electromagnet interpolated in the calling circuit which actuates an armature
arranged to act simultaneously as a stopping pallet and as a marker in such a
manner that marks or impressions corresponding to the number of the caller are
produced upon a paper strip passing freely out of the cover of the apparatus under
the influence of a weight or spring mechanism.
2. In announcing apparatus as set forth in Claim 1, the use of the adjustable grip.
weight for stretching the paper strip d.
3. In the announcing apparatus characterised in Claim 1 the application of a
moving mechanism actuated by a weight or spring mechanism for the propelling
of the paper strip.
Dated this 4th day of February 1898.
W. P. THOMPSON & Co.,
Patent Agents for the Applicant, 322, High Holborn, London, W.C.