DE698067C - Brake circuit for drives of electrically set wing signals with a holding magnet for the stop and drive positions - Google Patents

Description

From the patent 665 929 a brake circuit for drives is made electrically Wing signals with a holding magnet for the stop and drive positions known for the shutdown of the gear parts moved from the travel position to the stop position in two special lines, which are independent of those required for the actuation operation, via route and signal lever contacts are switched on.

Difficulties arise when using this circuit because the provided therein Route contacts are not always available (e.g. for signals at bus stops on continuous line tracks). On the other hand, when using 'route contacts There is also the further disadvantage that the fixing magnets are used each time the route lever is adjusted without a subsequent signal setting needlessly aroused.

These disadvantages are avoided according to the invention in that instead of route contacts to switch off the holding brake current conducted via the holding magnet> a closing only when the armature has dropped out Contact of a stop signal indicator is provided, the anchor through a delay device picks up delayed by the time required for a safe shutdown of the drive when it is reached the holding position is required. This response delay is relatively short-term and therefore to the railway safety operation, particularly with reference to the operation of route block facilities without influence.

An embodiment of the invention is shown in Figs. 1 and 2 with the railway 3 S Security system usual abbreviations shown.

Fig. Ι shows the arrangement of a stop signal indicator in the monitoring circuit for the stop position of the leaf signal,

Fig. 2 shows the arrangement of the contacts required to control the holding magnet in the

Brake circuit for the stop and drive position of the wing signal.

In the circuit shown in Fig. Ι (stop position of the wing signal) is a stop signal meider io via line i, which is only in the stop position closing drive contact 21, line 2 and resistor 13 excited by the monitoring current. When the armature of the stop signal indicator 10 is attracted, its contacts 11, 12 are interrupted. Resistance 13 and a are used as a delay device for armature tightening Capacitor 14 is provided. When the stop position is reached, the stop signal indicator 10 cannot address immediately because the

»5 switched resistor 13 caused a voltage drop too large and the partial current consumption caused by the capacitor 14 connected via contact 11 is also too high. Only when the charge of the capacitor 14 has a certain When the value is reached, the stop signal indicator 10 speaks through the action acting on its winding Capacitor discharge current and the voltage caused by the monitoring part Power on. During this time, however, as Fig. 2 shows, in the dashed line Circuits via the contact 12 on the stop signal indicator 10, line 3, which only with Stop position closing drive contact 22, holding magnet 23, line 4 and the signal lever contact 30 of the holding fix current worked. The extremely parallel to the capacitor 14 The high-ohmic resistor 15 is only used after the feedback unit 10 to destroy any remaining capacitor charge.

From Fig. 2 it can also be seen that the travel stop current to the signal drive over the changed position of the signal control contact '30, line 4, holding magnet 23 and the only when driving position closing drive contact is performed. ■

The purely electrical delay device explained with the exemplary embodiment for Stop signal indicator 10 can also be replaced by any other, e.g. mechanical will. Furthermore, instead of the signal contact 30, a contact of a signal control relay or a wing closer for a main signal can be provided for distant signal systems.

Claims (2)

Patent claims: i. Brake circuit for "electric drives Set wing signals with a holding magnet for the stop and drive positions according to patent 665 929, thereby marked. net that when the stop position is reached switched on via the holding magnet (23) by a drive contact (22) Holding brake current through a contact (12) a delayed response stop signal indicator (10) is switched off. 2. Braking circuit according to .Anspruch i ₍ characterized in that the stop signal indicator (10) attracts its armature by a delay device, e.g. a resistor (13) and a capacitor (14), delayed by the time required for safe stopping - the signal drive is required when the stop position is reached ..- For this purpose ι sheet of drawings ^{; :}