US1007211A - Electric-arc lamp. - Google Patents

Description

Patented 001;.31, 1911.

2 BHBETB-BHBET 1.

M. KRTING. ELEGTRIO ABU LAMP.

APPLICATION FILED NOV. B2, 190D.

d? A A A A A A A A A A A H X V I V I V Y 1 Y V I M. KRUNG.

ELECTRIC ARC LAMP.

APPLICATION FILED NOV. 22,1909.

1 1,007,211. Patented 001.31, 1911.

2 BHEETS-SHEBT 2.

UNITED STATES PAgENT oEEicE.

MAX KRTTNG, F LEUTZSCH, NEAR LEIPZIG, GERMANY, ABSIGNOB T0 KRTING c MATHIEBEN AKTIENGESELLSCHAFT, 0F LEUTZSCB, NEAR LEIPZIG,' GERMANY.

nnnc'rnlcnnc LAMP.,

Bpecilcation of Letters Patent.

Patented Oct. 31, 1911.

Application led November 22, 190B. Serial No. 529,440.

l To all whom it may concern:

Be it known that I, MAX Kn'rlNo, a subject of the German Emperor, residing at Leutzsch, near Leipzig, (rermany, have invented a new and useful Electric-Arc Lamp, of which the following is a s ecification.

This invention relates to e ectric arc lamps supplied with an alternating currentrandlts object is to provide improved means Whereby on any lamp being extinguished a compensating impedance shall be switched into the circuit so that the remaining lamps may be una'ected.

Figure 1 of the accompanying drawings shows diagrammatically, one form of lamp made in accordance with this invention while Fig. 2 shows a modified form and Fig. 3 shows another method of carrying out the invention.

1. 2 are the terminals of the main conductor between which is inserted a diiferential arc lamp the carbons of which are shown at 3, i

5 is the winding of the usual series magnet which tends to raise the carbon 3, and 6 t `t of the usual shunt magnet which tenus to lower the carbon 3. Another shunt circuit includes the exciting winding 7 of a switching device and the secondary 8 of a transformer coil, the primary 9 of which acting as a choke coil is inserted in yet another shunt circuit, which can be completed and interrupted by the switch itself shown at 10. The circuit of the choke coil is adapted to cause exactly the same fall of potential as does the lamp when alight.

The diagram shows the parts in the position occupled when the lamp is alight with no current flowing through the choke coil 9 but with a small current, i. e. one insufficient to move the switch, flowing through the exciting winding 7 and the secondary 8. Should however the carbon feed become deranged or either of the carbons nearly consumed, then the current in theexciting winding 7 will increase sufficiently to move the switch 10 so that the circuit of the choke coil 9 Vwill be completed, current will flow through this choke coil and the induced current in the secondary 8 owing through the exciting winding 7 will retain the switch in the required position. It will be seen that this arrangement overcomes the difficulty experienced with this class of apparatus that unless a main current winding is provided if the compensatin resistance is to produce exactly the same all of potential on the main circuit as does the lamp when alight then when such resistance has been switched into circuit in lieu of a lamp, the current in the exciting winding of the switching device resumes its normal state and the switch is accordingly no longer held.

In the modification shown in Fi 2 the winding 6 of the shunt magnet of t e lamp acts also as the exciting winding of the switching device. As before the winding 5 when excited tends to raise the carbon 3 through its solenoid While the winding 6 when excited tends to lower the carbon 3 through its solenoid. When anything goes wrong with the lamp, more current than is usual in the normal working of the lamp will fiow through the winding .6 which becoming hi hly excited draws down its armature fart er than can occur with the normal working of the lamp and causes the switch to close the primary or choke coil circuit.

In place of increasing the voltage of the current in the exciting winding of the switching device by a transformer coil, this may be effected by cutting a resistance out ofthe circuit of such exciting windin as soon as the compensating resistance has een switched in, this cutting out being accomplished by the movement of the switch itself.` This' modification is shown in Fig. 3 in which 1, 2 are the terminals of the main conductor between which is inserted a differential are lamp the carbons of which are shown at 3, 4. 5 is the winding of the usual series magnet which tends to raise the carbon 3 and 6 that of the usual shunt magnet which tends to lower the carbon 3 and also to operate switch contacts V10, 1l, 12, 13. 9 is a choke coil or ohmic resistance situated in a shunt circuit and adapted to cause when switched in exactly the same fall of potential as does the lamp when alight; one terminal of the coil 9 is connected to the switch terminal l0 and through the other switch terminal ll to the lamp terminal 2. 8 is a resistance one terminal of which is connected to the switchterminal l2, the resistance S being in a circuit which normally includes the winding 6; the4 other switch terminal 13 is connected to the line leading to the resistance 8. When the lamp is burning normally current flows through the-resistance 8 and thence through the winding 6 ment of'a main current windin winding 6 which there ore as in the preceding eases has passing through it a current of higher voltage than when the lamp was alight and the switching device will be held fast when the resistance `9 causes exactly the same fall of potential as does the lamp when alight and this without the employ- It will be obvious that any garni of magnetic switching device comprising an ex* citing winding may be employed.

What I claim is 1. In an alternating current arc lamp, the combination with a main circuit, of a switch having a shunt exciting winding, a transformer havin a primar adapted to be switched in said circuit w en the switch is o erated and adapted to cause practically t e same fall of otential in the main circuit as does the amp when alight2 and a secondary of said transformer in serles with the said excited winding.

2. In an alternating current are lamp, the

combination with a main circuit, of a shunt lamp r latmg magnet having a shunt exciting wlnding continuously excitedla switch aving a t controlled thereby, a transformer primary adapted to be switched in said circuit when the switch is operated and adapt-Y ed to cause practically the same fall of potential in the main circuit as does the lamp when alight, and a seconder of the transformer in series with the sai exciting winding.

a set of electrodes and a circuit therefor of an impedance adapted to replace said e ectrodes, an electro-magnetic switch for con- MAX KRTING.

Witnesses: i l i CARL SPmNesrnLo, RUnonrn Fmcxn.

3. In an arc lamp, the combination with i lamp, the combination with-

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