AT64377B

AT64377B - Electromagnetic index drive for DC motor meters.

Info

Publication number: AT64377B
Authority: AT
Original assignee: S Elster Fa
Priority date: 1913-03-12
Filing date: 1913-03-12
Publication date: 1914-04-10

Description

  

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 erhält der Zähler genau für diese Kontaktdauer durch den grösseren   Nebenschlussstrom,   der Anker und Kompensationsspule durchfliesst, einen stärkeren Antrieb, wieder vollkommen unabhängig von der Belastung, so dass er diese augenblickliche Reibung zwischen Kontaktspitze und Feder jederzeit und sicher auch bei dem   schwächsten Anlaufsstrom   überwinden kann. Vor allem erfolgt der stärkere Antrieb des Zählers allein durch die Erhöhung des Nebenschlussstromes und das damit verbundene höhere Drehmoment, das auf den von einem grösseren Strome durchflossenen Anker von dem ebenfalls hiedurch   verstärkten   Felde der Kompensationsspule ausgeübt wird. 



   Die Betriebssicherheit der Vorrichtung ist eine vollkommen ausreichende, denn der Kontaktschluss erfolgt unter einer genügend hohen Spannung und an anderen Stellen von   K und   F als die unter wesentlich niedrigerer Spannung, nämlich nur   einigen V ult stattfindende Stromunterbrechung.   



   Die Schaltung ermöglicht es natürlich auch, das Zählwerk unabhängig von dem Zähler an   beliebig ihm entfernten Stellen anzubringen und zu betreiben.  



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 The meter receives a more powerful drive for precisely this contact duration due to the larger shunt current flowing through the armature and compensation coil, again completely independent of the load, so that it can overcome this instantaneous friction between contact tip and spring at any time and safely even with the weakest starting current. Above all, the more powerful drive of the counter occurs solely through the increase in the shunt current and the associated higher torque, which is exerted on the armature through which a larger current flows from the field of the compensation coil, which is also reinforced by this.



   The operational reliability of the device is completely sufficient, because the contact closure takes place under a sufficiently high voltage and at other points of K and F than the current interruption which takes place under a significantly lower voltage, namely only a few V ult.



   The circuit also makes it possible, of course, to attach and operate the counter independently of the counter at any point remote from it.

Claims

PATENT CLAIM: Electromagnetic index drive for DC motor meters with from the mains EMI2.1 which in a certain position slides against a spring (F) arranged outside the armature but close to its axis, which is connected to a point (P) of the series resistor (V) via the electromagnet (M) driving the counter, so that when touched between the segment (K) and the spring (F) due to the connected parallel connection of the electromagnet (M) to a part of the ballast resistor, the greater part of the resulting increased level current flows through the electromagnet (il) and excites it,

then undivided the EMI2.2 With a more powerful drive, the friction that occurs when the contact (K, F) is actuated safely. completely independent of the load to overcome, on the other hand to completely relieve the counter of the counter work during the rest of the revolution.