DE426788C - Electrical switch - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
MARCH 18, 1926

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21c GROUP

(S 65687 νΐΙΙ \ 2ΐ &)

Electric switch.

Addendum to patent 412764.

Patented in the German Empire on April 1, 1924. The main patent started on August 29, 1923.

In the main patent, an electrical switch with two positions is described; whose shift drum is moved in both directions by one and the same actuator will. Linings are provided on the shift drum, which this actuator, ζ. B. an electromagnetically controlled compressed air cylinder, After switching over, disconnect the power source and the control circuit prepare for the following switching movement.

Fig. 1 of the drawing shows the circuit diagram of the device. V and /? are the power supply lines for forward and reverse travel, ο is the excitation coil for · the valve of the compressed air cylinder, η the connection to the contactors. In the position shown, the switch is on "Forward". If the direction is to be reversed, the supply line /? connected to voltage, and a current flows from R. via contact finger 2, shift drum lining ρ, finger 3 to the coil ο. This actuates the switching cylinder so that the roller rotates. Line II takes the place of line I, and IV takes the place of III. At the end of the switching movement, the contact finger 1 'is separated from the forward line V and the control current line λ via the fingers 1 and coating ρ

*) The patent seeker stated as the inventor:

Carl Vogel in Berlin-Schöneberg.

Claims (1)

connected to the R line. Contacts 2 'and 3' are through. Lining m connected to one another, so that the excitation coil is now on the V line, while its connection to the R line is interrupted. The switch from "backwards" to "forwards" is prepared and takes effect as soon as V receives power again. The switch works perfectly with individually moving motor vehicles. On the other hand, disruptions can occur when several motor vehicles are put together to form a train. During the switchover a connection from V to R is created via the line 3-3 ', and this also gives the valves of the switch in the coupled car power, which were already correctly and now switch to the opposite position, so that, for. B. the first car on "Forward" and the attached car on ("Backwards"). This disadvantage is avoided by the invention, which consists in the fact that the coverings and p, which cause a gradual transition from one position to the other, are replaced by a snap switch which maintains the connection existing at the beginning of the same during most of the switching movement and only interrupts the power supply to the actuator at the last moment and prepares the circuit for the opposite switching movement. Any momentary switch can be used as a switch in the appropriate design, in which the kinetic energy supplied is initially used to tension a spring, which is automatically triggered at the last moment of the switching movement and the switching is carried out abruptly. The circuit diagram of the switching device improved according to the invention is shown in an example in Fig. 2 of the drawing. In the position shown, the switch is on "Forward" and the control current flows from the V line via ¹ the switching element S ₁ to the control current line 2 _r and on to the contactors. If the R line is connected to voltage, a current flows through i _r -3v> the switching _{element S 2 of} the snap switch to contact 2 "and on to the excitation winding ο of the control valve coil. While the contacts of the snap switch remain in their original position, the compressed air cylinder rotates the switch drum and at the same time tensions the spring of the; Snap coupling k until it triggers and throws the snap contacts S ₁ and S ₂ around. The valve coil ο is switched off at 3 "and immediately connected to the V line via contact 3. The following switchover is now prepared. At the same time, the control line 2 _{r is} separated from the V line at i "and connected to the R line at 1, so that the contactors now receive reverse current. Due to the arrangement according to the invention there are faulty circuits, as they may under certain circumstances can arise with the first described arrangement, completely excluded: Fatent claim: Electric changeover switch with two positions, in which the switching drum is moved in both directions by the same actuator, according to patent 412764, characterized by a snap switch, which only ^{breaks the power supply to the actuator under 1} in the last part of the switching movement of the switching drum and which the opposing switching movement controlling circuit prepared. Fig.i. Fig. 2.