DE256204C

DE256204C -

Info

Publication number: DE256204C
Application number: DENDAT256204D
Authority: DE
Publication date: 1900-01-01

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- JIg 256204 KLASSE 20/. GRUPPE- JIg 256204 CLASS 20 /. GROUP

Patentiert im Deutschen Reiche vom 28. Juli 1912 ab.Patented in the German Empire on July 28, 1912.

Bei elektrischen Fahrzeugen mit Sicherheitskurbel zum Unterbrechen des Fahrstromes bei Unfällen des Führers (Loslassen der Fahrkurbel), hat man bisher eine von einem Ruhestrom durchflossen Hüpferspule verwendet, um die Luftdruckbremse anzustellen. Diese Einrichtung hat den Nachteil, daß auch beim Befahren spannungsloser Strecken (Streckenunterbrechern usw.) in störender Weise stetsIn electric vehicles with a safety crank to interrupt the traction current Accidents of the driver (letting go of the crank handle), one has so far one of a quiescent current traversed hopper coil used to turn on the air brake. These Facility has the disadvantage that even when driving on voltage-free routes (route interrupters etc.) always in a disturbing way

ίο die Bremse in Tätigkeit tritt.ίο the brake is activated.

Vorliegende Erfindung vermeidet diesen Übelstand dadurch, daß bei Fahrzeugen der vorbeschriebenen Art zum Anstellen der Bremse eine vom Arbeitsstrom durchflossene Hüpferspule verwendet wird, die mittels Hilfskontakte am Fahrstromhüpfer in dessen Ausschaltstellung und mittels Kontakte am Fahrtrichtungsschalter in dessen Einschaltstellungen in den Arbeitsstromkreis eingeschaltet ist. Der Arbeitsstromkreis ist ferner über Kontakte an der Sicherheitsfahrkurbel geerdet.The present invention avoids this drawback in that the vehicles The type described above for applying the brake is a hopper coil through which the working current flows is used, which is switched off by means of auxiliary contacts on the traction current hopper and is switched on by means of contacts on the travel direction switch in its switch-on position in the working circuit. Of the The working circuit is also earthed via contacts on the safety crank.

In der Zeichnung ist eine der Erfindung entsprechende Schaltung schematisch dargestellt. In the drawing, a circuit corresponding to the invention is shown schematically.

Der Fahrstromhüpfer α besitzt einen Kern b, der im angehobenen Zustand einen Schalter c für den Fahrstromkreis schließt und in seiner tiefsten Lage die Kontakte d und e überbrückt. Die Kontakte d und e liegen im Stromkreis des Bremshüpfers f, dessen . Kern im angehobenen Zustand ein an die Hauptleitung der Luftdruckbremse angeschlossenes Ventil g öffnet. In den Stromkreis des Hüpfers f sind ferner Kontaktfinger h und i eingefügt, die von Kontaktstücken am Fahrtrichtungsschalter k in dessen Einschalt st eilungen überbrückt werden. Schließlich ist der Stromkreis über die mit der Fahrkurbel m verbundenen Kontakte n, w an Erde gelegt. Die Fahrkurbel steht unter der Wirkung einer Feder, die bestrebt ist, einen Kontakt zwischen η und w herzustellen.The driving current hopper α has a core b which, when raised, closes a switch c for the driving circuit and bridges contacts d and e in its lowest position. The contacts d and e are in the circuit of the brake hopper f, whose. Core in the raised state, a valve g connected to the main line of the air brake opens. In the circuit of the hopper f contact fingers h and i are also inserted, which are bridged by contact pieces on the direction switch k in the switch-on stelungen. Finally, the circuit is n on the m with the driving crank associated contacts w to ground. The crank is under the action of a spring that tries to establish contact between η and w .

Bei der Bewegung des Fahrschalters 0 aus der Nullstellung in die Stellung I kommt außer dem Kontaktfinger r in einer Zwischenstellung der Kontaktfinger q mit dem Kontaktstück p in Berührung. Damit ist folgender Stromkreis geschlossen: Von der Oberleitung s über den Stromabnehmer t, Leitungen u, v, Kontaktfinger q, Kontaktstück fi, Kontaktfinger r, Fahrstromhüpfer α zur Erde. Der Hüpfer α zieht seinen Kern b an und dieser schließt den Schalter c. Der Strom fließt jetzt von der Oberleitung s über Stromabnehmer t, Leitung u, Schalter c durch die Hüpferspule a zur Erde, so daß auch, nachdem der Kontaktfinger q von dem Kontaktstück p abgeglitten ist, der Fahrstromhüpfer α vom Strom durchflossen wird. Der Fahrstrom wird alsdann in bekannter Weise geregelt.When the travel switch 0 is moved from the zero position to the position I , in addition to the contact finger r, the contact finger q comes into contact with the contact piece p in an intermediate position. This completes the following circuit: From the overhead contact line s via the pantograph t, lines u, v, contact finger q, contact piece fi, contact finger r, traction current hopper α to earth. The hopper α attracts its core b and this closes the switch c. The current now flows from the overhead line s via pantograph t, line u, switch c through the hopper coil a to earth, so that even after the contact finger q has slipped off the contact piece p , the traction current hopper α is traversed by the current. The traction current is then regulated in a known manner.

Claims

If the driver lets go of the crank m while driving, the contacts η and w are pressed against one another under the action of the spring, and the current now flows past the driving current hopper α via n, w directly to earth. Hopper α is short-circuited, core b falls down, opens switch c and bridges contacts d and e. The traction current is as a result

ίο interrupted and the excitation current for the brake hopper f switched on. This current runs from the overhead line s via pantograph t and line u, contacts e, d, brake hopper f, contact finger h, contact piece k, contact finger i, contacts η and w of the safety crank and then to earth. The brake hopper f is excited and its core opens the valve g of the air pressure brake that is coupled to it.

If the vehicle is energized and the traction current hopper α is de-energized as a result of an accident involving the driver, braking takes place.

If, on the other hand, the vehicle arrives on a voltage-free route, the driving current hopper α is also de-energized, and the contacts d and e in the excitation circuit for the brake hopper f are bridged. However, since the contacts η and w on the driving crank do not touch each other due to the loading of the crank by the driver's hand, braking does not occur. After driving on the voltage-free route, the exciter circuit for the brake hopper is interrupted and the drive circuit is closed after the drive roller has been returned to the zero position and the motors started again, as described above.

Sponsors τ-An SPRU c η:

Device for interrupting the traction current and turning on the air pressure brake of electric vehicles when the travel crank is released by means of a switch connected to the travel crank and a hopper coil lying in a closed circuit, which is short-circuited when the travel crank is released and interrupts the travel circuit, characterized in that for turning on the air pressure brake a second actuated by the working current hop coil (f) is used, wherein the coil (f) (d, e) in the operating circuit by means of auxiliary contacts on the driving current hop (a, b) in its open position and by means of contacts (h, i) on the travel direction switch in the Switch-on positions are switched on and the working circuit is connected to earth via the contacts (n, w) connected to the travel crank, for the purpose of avoiding unintentional braking when driving on currentless routes (e.g. route interrupters).

1 sheet of drawings.