SU73685A1 - The device for the blackout of traffic lights - Google Patents

Description

The object of the present invention is a device for the blackout of traffic lights in signaling systems and the like, by stepwise switching the lamps to a lower voltage. This switching is carried out using two relays; the operation of the latter depends on an alarm relay of the type AP, controlled from the central point by a single or multiple shutdown and subsequent switching on of the mains supply.

A distinctive feature of this device is that in order to provide different degrees of blackening, depending on the natural light, the device uses two resistances. These resistances can be connected in series with the lamp of the traffic light, separately or jointly through the contacts of two mutually interlocked one with the other relay / and //, the common circuit of which is conducted through the rear contact of the alarm relay AR. As a relay / relay is applied with a delay on the disappearance.

The invention is illustrated in the drawing, where in FIG. 1 is a schematic diagram using a CDR or HP-1 type relay in it, and FIG. 2-diagram with the use of the relay type NPR-2. Rear

13 Code Release 4, 1949

the contacts on the diagrams are shown lower, the front contacts - upper.

The diagrams provided allow four different combinations of switching on the light traffic light to be made.

1. Normal position of the circuit

Traffic lights are under full voltage. Relay / and // - without current. Relay AR-under current. The power of the lamps of the traffic light comes from the SOBS transformer on the secondary winding of the transformer, the front contact of the relay AR, the contacts of the relay LR, the lamp (one of them) of the traffic light, the rear contact of the relay /, the secondary winding of the transformer.

Resistance Re and / i-; not included in the circuit.

2. First turn off line 110 fi

Relay / -current. Relays AR and // without current. The power supply of the s-vetofore lamps comes from the battery. In the power supply circuit of the lamps in series with the lamps, the resistance Rc is switched on which reduces the voltage by 30-35%.

The power supply of the lamps occurs along the circuit: battery plus, rear AR contact. LR contacts, light bulbs 193

torus, rear relay contact //, front relay contact /, rear relay contact 11, resistance mipus battery. Resistance Re, not included.

3. The first inclusion of the line 110 in

Relay /, relay // and relay AR are energized. The lamn lamp is supplied from the secondary winding of the SOBS transformer. The price of the power supply of the lamps is connected in series with the lamps sonically Ac, which reduces the power supply voltage .ch.mp by 30 --- 35%.

Luminescence occurs on the following circuits: secondary winding of SBS transformer, front contact of relay AR, contacts of relay LR, lamp C15 of stop, front contact of relay P, matched Re., Front contact of relay /, front contact of relay //, secondary winding of transformer.

4. The second inclusion of the line 110 in

LR relay and relay / without current. Relay current. The power of the lamp traffic lights comes from the akkmultora battery.

At the price of lamp supply, two RC impedances are connected in series with the nanometers and, as a result, the voltage across the lamps is reduced by 60-70%.

The power supply for the lamps is as follows: plus a battery, a rear contact of the AR relay, a LR contact, a traffic light lamp, a front contact of the relay //, resistance Rc, a rear contact of the relay /, resistance Rc, minus the battery. The second time the line 110 is turned on in the relay AR will be energized, the relay / and relay // will be without current. The circuit comes to its original position.

Subject invention

Claims (2)

1. A device for the blackout of traffic lights in signaling systems on a topic similar to that of a step-by-step switching of lamps to undervoltage by inserting a resistance into the lamp circuit by means of several relays, whose operation is dependent on the voltage relay, which is controlled from the central point once or only. .multiple shutdown and subsequent switching on of the power supply network, which is necessary to ensure that, in order to provide different degrees of blackout, depending on natural light, and In the design, two resistances are applied, connected in series with the signal lamp separately or jointly through the contacts of two relays interlocked with each other and and / L of the common circuit through the rear contact of the alarm relay AR. 2. In the device according to claim. 1, use as a relay / relay with a delay to drop. Ho 73685 FIG. one