AT136257B

AT136257B - Lighting device for the dial on telephone sets.

Info

Publication number: AT136257B
Authority: AT
Inventors: Armin Kalmar
Original assignee: Armin Kalmar
Priority date: 1931-08-08
Filing date: 1931-08-08
Publication date: 1934-01-25

Description

  

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  Beleuchtungseinrichtung für die Wahlscheibe an Telephonapparaten. 



   Es sind bereits Einrichtungen für die Beleuchtung der Wahlscheibe des Telephonapparates, welche beim Abheben des Handhörers aufleuchten, bekannt. Hiebei wurde entweder der Telephonstromkreis oder eine Batterie bzw. das Lichtnetz zur Speisung der Beleuchtungseinrichtung herangezogen. Alle diese Einrichtungen bedingten jedoch eine besondere Konstruktion der Wahlscheibe, da die Lampen in der Wahlscheibe eingebaut wurden ; falls dies nicht der Fall war, wurde die Lampe unabhängig von der Wahlscheibe auf einem besonderen Ständer angeordnet und dadurch die Lampe räumlich so in Beziehung zur Wahlscheibe gelegt, dass die Lichtstrahlen auf die Wahlscheibe fallen mussten. 



   Gemäss der Erfindung besteht die lediglich eine Zusatzeinrichtung zur Wahlscheibe bildende Beleuchtungseinrichtung aus einer Glocke, in welche die Glühlampe eingeschraubt wird, und weiters aus auf der Achse der Wahlscheibe sowie auf einer besonderen Hülse angeordneten stromführenden Lamellen, auf denen Schleifkontakte gleiten, wodurch auch bei Drehen der Wahlseheibe die Beleuchtung aufrechterhalten wird, sobald der Hörer abgehoben ist. 
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 u. zw. zeigt Fig. 1 den Grundriss, Fig. 2 den Aufriss der beispielsweisen Anordnung. 

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  Lighting device for the dial on telephone sets.



   Devices for illuminating the dial of the telephone set, which light up when the handset is lifted, are already known. Either the telephone circuit or a battery or the lighting network was used to supply the lighting equipment. However, all these devices required a special construction of the dial, since the lamps were built into the dial; If this was not the case, the lamp was placed on a special stand independently of the dial and the lamp was spatially related to the dial in such a way that the light rays had to fall on the dial.



   According to the invention, the lighting device, which is only an additional device to the dial, consists of a bell into which the light bulb is screwed, and also of current-carrying lamellae arranged on the axis of the dial and on a special sleeve, on which sliding contacts slide, which means even when the Wahlseheibe the lighting is maintained as soon as the handset is lifted.
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 u. Between FIG. 1 shows the floor plan, FIG. 2 shows the front view of the exemplary arrangement.

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Claims

The device according to the invention comprises a bell 1, in which an artificial light source 2 is installed, which is fed from one of the telephone circuits, the light network, a battery or the like. The bell 1 is screwed onto the axis J of the dial 4, the axis 3 itself serving as a ground with the bell 1 as a power supply for one pole or possibly also being used to lead through a special wire. At the lower end of the axis 3, which carries the tension spring, a contact ring J is pushed, which rotates with the axis 3 and over which a spring contact 6 slides.

A sleeve 7 is also pushed onto the axle 3, which is provided with a rubber sleeve 8 on the inside for the purpose of isolating it from the axle 5, with a spring contact 9 also sliding on the sleeve 7. This sleeve 7 can be carried along during the rotation by means of a split pin 10 penetrating the axis 3. An insulated wire 11 is led from the sleeve 7 to the bell or to the second contact of the incandescent lamp 2. In order to only put the lighting device into operation when the telephone equipment is being used, the current conduction is arranged in such a way that the circuit is closed only after the receiver is lifted.

PATENT CLAIM: Lighting device for the dial on telephone sets by means of an artificial light source which lights up when the handset is lifted and is structurally connected to the dial device, characterized in that the lighting device, which is merely an additional device to the dial, consists of a bell (1), in which the light bulb (2) is screwed in, further from a contact ring (5) plugged onto the axis (3) of the dial and a further contact sleeve (7) that can be rotated with the axis (3), on which contacts the contact springs (6 to 9) grind, consists. ** WARNING ** End of CLMS field may overlap beginning of DESC **.