DE103652C - - Google Patents

Description

IMPERIAL

PATENT OFFICE

PATENT LETTERING

CLASS 20 ^ Railway operations. IfJ

Patented in the German Empire by al. July 1898.

The present invention forms a new automatic switching device for / Electric trenches with mixed operation, i.e. those tracks which are partly Upper, partly with subordination, partly with collectors.

The innovation consists essentially in the fact that when starting the journey on the upper or Underline or at the beginning of the recharging the collector the latter automatically Resistors are connected upstream. The purpose of this is to determine the charge and discharge conditions for the respective ones coming into operation Compensate for stretches. By adding a resistor, in particular, since the accumulators are charged with a constant voltage, the initial amperage is prevented from rising above a prescribed maximum value, and finally is to be prevented by the upstream connection of the resistors that in the Overhead line unavoidably occurring frequent fluctuations in the voltage cause a discharge the accumulators in the upper resp. Underline takes place. Also is through correct Compensation of the series resistance an excessive gassing of the elements towards the end of the Charge prevented.

The switching device is set up in such a way that the resistors are switched on and off to the extent that it happens automatically, so to speak, as through the process of creating respectively the withdrawal of the pantograph at the same time the switching device in Activity occurs.

The accompanying drawing serves as an illustration. On the same is:

Fig. Ι the side view of a streetcar equipped with the new switching device,

Fig. 2 is a schematic representation of the switching device and the with the same in Connected apparatus and lines.

Figures 3 and 4 are partial views which will be explained below.

Α denotes the pantograph, A the automatic switch, C the control, M the motor, k the line connecting these devices, g the incandescent lamps used for lighting, f incandescent lamps which serve as resistors, JMm ₁ the line connecting the lamps, E the collector, W the series resistor for the collector.

The switching device forming the subject of the invention in particular includes those with U ₁ a. ₂ b and c marked parts. ^ ₁ α, are two metal sectors which are rigidly and conductively connected to the rod α carrying the pantograph bracket or the roller and rotate together with it. In the vicinity of the fulcrum of the contact rod, namely in the plane of rotation of the same, there is a spring b ; it is in communication with the collectors through line h. On this by means of a resilient joint on the

Claims (2)

Spring b attached to the roof of the carriage is in turn rotatably attached to a section of the same a second spring c, which is isolated from the former by an inserted hard rubber frame d and a hard rubber bushing e (Fig. 4). The spring c is connected by a line i to the line m for the incandescent lamps, but in such a way that the incandescent lamps (resistors) ff can be short-circuited through this line i, i.e. switched off. · In the position shown in Fig. 2, the parts abc are separated from each other. The current comes from the overhead line, goes through the pantograph to the automatic cut-off switch ^ !, then branches off into the lines km and jp, of which the first leads to the control unit and the motor, the second to the incandescent lamps g, whereby the current the resistors (incandescent lamps) ff must flow through; the third line n> leads to the accumulators, the current passing through the resistor W. Lines i and h are not included in the circuit at this stage. During the transition from driving with overhead lines to driving with collectors, the current collector rod is pulled down to one side or the other, while one of the sectors ^ r1 or a.2, as shown in FIG. 3, hits against the springs b c. Since the contact surface of the sectors is as wide as the spring b, this creates a conductive connection between the springs b and c and the sector a.2 respectively. al manufactured. The discharge current from the accumulators now takes the following path: it flows through the line h, i.e. with the resistor W short-circuited, to the spring b and branches there into two branches, one of which goes through the sector a.2 to the automatic switch, from there to the Control, goes to the motor and finally to earth, while the second, through the intermediation of sector a.2, leads to spring c through line i and short-circuiting the resistors ff to incandescent lamps g, from where it also goes to earth. The resistors W and ff have thus been switched off by simply flipping the current collector and the line has been set up for the operation of the accumulator, without any special handling being necessary or to be observed for this purpose. Pa te νt-A ν Proverbs: 1. A switching method for streetcars with mixed operation, in which the Collectors are preceded by resistors, characterized in that these resistors automatically switched off when the pantograph is lifted off the line will. 2. An embodiment of the circuit protected by claim ι, characterized by attached to the axis of the current collector rod sectors (a _x a ") and arranged in the plane of rotation of the sectors, insulated from one another slide springs (bc), one of which (b) below The resistor (W) is switched off with the collectors (E), the other (c) is conductively connected to the incandescent lamps (g) with the incandescent lamp resistors (ff) switched off, the resistors being short-circuited by the sector when the current collector rod is turned over U ₁ or a. ₂ with the feathers (b and c) , comes into a conductive connection. 1 sheet of drawings.