DE431261C - Automatic regulation device for the supply of coal in projection arc lamps with motor drive - Google Patents

Description

GERMAN EMPIRE

ISSUED JULY 1, 1926

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21 f GROUP 9

(E jos22 VIIIj2 rf ' ¹ J

Company Ernemann-Werke A.-G. in Dresden.

Automatic regulating device for the coal supply for projection arc lamps

with motor drive.

Patented in the German Empire on March 26, 1924.

Automatic regulating devices for the intermittent power supply to the large

Charcoal supplies for arc lamps are important; part that in the event of an unforeseen return

knows. These known devices, '■ set the power supply to the regulator

which probably pulls together coals quickly with burning arcs and so on

Work satisfactorily, but show cause in the event of short circuits. as well

is in some regulating devices the regulating motor, which when burning the The lamp is working with lamp voltage; if the arc is extinguished, it is seriously endangered, because the same then gets the full line voltage. To eliminate these disadvantages, the circuit shown in the figure is used.

According to the invention, the regulation ίο of the coal replenishment by the engine done automatically by voltage relays, so that the motor only works with one within the Arc voltage lying voltage is working.

By turning on the main switch a , the mains voltage is applied to the arc lamp c with the interposition of the lamp resistor b and fed to the magnetic coil d of the relay R II. The armature e of the relay RII is immediately attracted, the contact / opened, so that the solenoid g of the relay RI is de-energized, because both relays have the same lifting height. When the switch α is closed, relay R II receives full mains voltage, and since contact / is initially closed, relay RI also has full mains voltage. So both relay coils d and g are energized for the first time, and both armatures c and h are attracted. Contact f is opened immediately, while contact i is only closed after the end of the stroke. However, this cannot happen because the lifting height is large enough and contact / is opened sooner than contact / can be closed. Should the living force of the armature h actually cause contact i to close, armature Ii will drop out again immediately, since contact f is opened instantly and relay RI is again de-energized. Relay R II is therefore a pilot control for relay R I. The lamp is now ignited by hand, ie the carbon pins are brought closer to their contact and then carefully removed from one another; the resulting arc is then regulated to a voltage of around 48 volts. Since the magnet system of the relay R II is tuned so that it no longer attracts the armature at 55 volts, Anke, r e is withdrawn at about 48 volts arc voltage, whereby the contact f is closed and the magnet system g of the relay RI is energized is, ie the armature h is attracted and the contact i is closed. By this process, the circuit of the motor k is closed, where-; through which he begins to run. By a two- 'times Schneckenvorgjelege Z is the movement; transmission of the motor to the coal feed spindle of the lamp. In order to be able to change the time-ι borrowed forward movement of the coals through the motor, a regulating resistor m is switched on in the motor circuit. The relays RI and R II are tuned so that they leave the motor current switched on as long as the arc voltage; voltage is maintained at 46 to 47 volts. Should the coals come too close due to the motor running too fast, i.e. the arc voltage should drop, the relay j RI releases its armature h and opens the contact i ,! with which the engine comes to a standstill and ^: the coal supply is no longer necessary. If the arc voltage increases when the coal burns, the armature h of the relay RI is pulled out again and the motor k is put into operation again when the contact i is closed. With good adjustment · of the relays RI and R II , it is possible to keep the arc voltage at the specified level within a narrow range and to ensure clean, automatic regulation of the lamp.

Claims (1)

Patent claim: Automatic regulating device for the coal supply in projection arc lamps with motor drive, characterized by two voltage relay (RI and RII), one (RII) with _go of its magnetic winding (d) is located on the light networks and an armature (e) against a spring force energized as long, and thereby the The circuit for the other relay (RI) is interrupted as long as the operating voltage exceeds the desired normal lamp voltage, whereas the armature (e) is released under the action of its spring and thus the circuit of the magnet winding (g) of the relay (RI) is closed and thereby at the same time the supply motor (k) is switched on as soon as the operating voltage has adjusted to the desired normal lamp voltage, while finally the armature (h) is torn loose from the associated magnet under the action of its spring and thus the supply motor (k) is interrupted by the motor circuit (at i ) is shut down as soon as the lamp voltage reaches the required level falls below normal level. 1 sheet of drawings.