Improvements in and connected with Telephonic Apparatus.
Year: 1896

page_text: Date of Application, 21st Jan., 1896-Accepted, 22nd Feb., 1896
COMPLETE SPECIFICATION.
Improvements in and connected with Telephonic Apparatus.
I, HUGO MARCUSE LL.D. of An der Spandaeurbrücke 7, Berlin, in the
German Empire, Solicitor, 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 telephonic apparatus and its objects are to render the
use of the receiver more convenient and to provide better means for substituting the
speaking circuit for the signalling circuit and the reverse.
I will describe my said invention with reference to the accompanying drawings
in which Figure 1 represents in side elevation the devices or appliances which
I employ for holding the receiver.
The receiver h is supported upon the end of the arm b upon which it can be
secured by the adjustable strap c or otherwise. It may consist of a single piece of
limited length or of the two parts a b one of which can slide and be adjusted in or
upon the other as indicated by the figure, so that by this means the receiver can be
adjusted at any desired distance from the mouth of the transmitter when in use.
The arm is mounted upon a hinge or pivot, connected by the lugs e¹ to the disc e
which can be rotated around its centre to an extent limited by the stop f. The
receiver arm can thus be moved laterally and vertically. The disc e may
conveniently be pivoted upon the plate o. When the instrument is out of use, the
arm occupies the position indicated in Figure 3.
I employ the motion of this arm according to my invention, for changing the
circuits. Since however it is more convenient to employ the vertical motion I
will limit my description to the means which I may employ for utilizing this
motion.
Referring to Figure 2 which represents a side elevation of the apparatus, the arm
and receiver being omitted for the sake of clearness, it will be seen that the
disc e which is represented in the position occupied by it when the receiver is
in use, has an inclined projection g. In contact with the edge of the disc is
the upper end of an L-shaped lever i k fulcrumed at l. The lower end of the
lever ik rests in the hook m formed on the end of the switch lever by means of
which the circuits are changed. In the position shewn, the hook m is at its highest
point and the speaking circuit is connected. When the conversation is finished
the receiver arm is pushed up into the position indicated by Figure 3. By this
action the projection 9 is brought under the end of the lever ik the lower end
of which is thus depressed and pushes down the hook m thereby correspondingly
moving the switch lever and changing the speaking circuit for the signalling
circuit. A spring may be employed in connection with the switch lever carrying
the hook m in such a manner as to tend to force the lever normally upwards.
A modification is represented in side elevation by Figure 3. Here a weights is
suspended from the end of the lever t, fulcrumed at r and resting in the hook m.
The lever t is connected by a cord or chain p with the disc e at n as indicated.
Thus, when the receiver arm is lowered for use, the chain p will lift the lever t
and weight s permitting the switch lever to be lifted by its spring and changing
he circuits.
Figure 4 represents in side elevation and Figure 6 in vertical cross section,
further modification. The disce has a lug projecting from its edge in which

page_text: is pivoted the upper end of the lever u having u² as a centre of motion. This
centre may consist of the set screw shewn, in the slot . The lower end of the
lever is constructed to engage the arm v pivoted at vl. Thus, when the receiver
arm is lowered, the hook m with its switch lever will be raised and the reverse,
and the circuits will be correspondingly changed.
In the modification represented in side elevation by Figure 5 the rod w is
pivoted at one end w' to the disc e and at the other end to the lever fulcrumed
at z. The end of the lever z opposite to the pin w¹ engages with the hook m and
the result of the movement of the receiver arm is to change the circuits as
hereinbefore described.
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. In telephonic apparatus a receiver arm pivoted or hinged upon a rotary disc
so as to be capable of motion in a vertical plane and in planes perpendicular
thereto, substantially as hereinbefore described and as illustrated by the accom-
panying drawings.
2. In telephonic apparatus the combination with a receiver arm such as is set
forth in the preceding claiming clause, of one or more rods links levers chains
or the like means for communicating motion from the receiver arm to the circuit
changing switch lever, substantially as herein before described with reference to
the accompanying drawings.
3. In telephonic apparatus a receiver arm constructed in two parts one of
which is adjustable longitudinally relatively to the other, substantially as herein-
before described and as illustrated by the accompanying drawings.
Dated this 20th day of January A.D. 1896.
W. E. HEYS & SON,
Agents for the Applicant.