US1191289A - Arc-lamp. - Google Patents

Description

W. DlETZ.

ARC LAMP.

APPLICATION mm APR. 30. 1914.

Patented July 18, 1916 3 SHEETS-SHEET I.

w. DIET Z, ABC LAMP;

APPLICATION FILED APR; 30,I9l4.

Patented July 18, 1916..

3 SHEETS-SHEET 2.

w. DIETZ.' ARC L AMP.

APPLlCATlON FILED APR. 30, 1914. 1,191,289. Patented July 18, 1916.

. 3 SHEETS-SHEET 3,

O 45 l 16 O,

half their usual brillianc WILHELM DIETZ, 0F LiEUTZSCH MATHIESEN AKTIENGESELLSCHAFT, OF LEUTZSCH, IN EAR LEIPZIG, GERMANY.

ARC-LAMP.-

Specification' of Letters Patent.

Patented July 18, 1916.

Application filed April 80, 1914. Serial No. 835,469.

To all whom it may concern:

.Be it known that I, IVILHELM DIETZ, a

subject of the German Emperor, residingat 9 Bismarckstrasse, Leutzsch, near Leipzig, Germany, have invented a new and useful Arc-Lamp, of which the following is a specification.

This invention has for its object to aflect the light (by which is meant either extin-v guishing the lamp or decreasing or increasing the light given by it) given by one or more are lamps connected in series without affecting that of the others. According to this invention this is effected by momentarily changing the strength of the current. For this purpose there may be employed a pair ofmagnets and a movable member adapted to be moved to and-fro under the influence of the magnets, the momentary abnormalcurrent causing the movable member to directly or indirectly close a circuit which permanently affects the strengthof one of the magnets. One magnet is preterably the main lamp magnet, the other the shunt magnet andfthe movable member the carbon feed regulator.

The invention is particularly applicable for street lighting in which it is' desired either to extinguish at a given hour some or all-of the lamps inthe series or to make some or all of the lamps burn with diminished brilliancy.

'lh e;invcntion is illustrated in theaccompanylng drawings in which Figure 1 shows alamp circuit to one or more of whose lamps the invention may be applied; Fig. 2 shows a lamp which can be extinguished by a momentary rush of current and Figs. 3 and 4 show lamps which can be made to 'give less light by the same means. i

In Fig. 1, 1 is the primary winding of a transformer for constant current, 2 its movable secondary anda 7) c d e are lamps in series connected to the secondary winding 2. The lamps a c c for example may be lamps in accordance with this invention so that these can be extinguished while the lamps 7) and (l continue to burn. Or all or some of these lamps may be made to burn with 'ing ,thefshunt magnet against the contact 18.

In the drawings lamps are shown in which the abnormal current is a sudden rush of current and the lamp is either extinguished or made to give a decreased light.

In Fig. 2, 3 is a disk, tis the main lamp magnet, 5 a shunt magnet; the disk 3 is NEAR LEIPZIG, GERMANY, ASSIGNOR T0 KfiRTING 8i.

adapted to move about its axle 6 anticlockwise under the influence of magnet 4 and clockwise under the influence of magnet 5. 7 is a quadrant moving with the disk 3 and operating a chain 8 and thus the clutch 9 of the upper carbon 10 which through a chain 11 passing. over a pulley 12, is connected to the lower carbon. 13 is a contact moved by the disk 3 and 14 is-a small re sistance. 15 and 16 are the main lamp terminals. l7 and 18 are contacts in the path of the movable contact 13.

The disk 3 oscillates under the influence of the magnets 4 and 5 to regulate in the usual manner the carbon feed. l/Vhen however a rush of current is purposely transmitted from the centralstation the magnet 24 moves the contact 13 to an abnormal extent thus causing it to make contact with the contact 18. The lamp is now extinguishedbeingi short circuited upon the resistance 14 thus depriv- 5 of nearly all our- Pent which has for effect that the magnet 4:

when again energized to the normal extent will continue to hold'the contact 13 firmly out the lamp voltage becomes higher than the normal thus causing the magnet 5 to become stronger and the disk?) to move clockwise bringing th contact 13 against the contact 17 thus extinguishing the lamp. The magnet 4 will now receive no current while by arranging that the resistance 14 shall cause a fall in tension about 4 to 6 volts, the magnet 5 is given the necessary strength to hold the contacts 13 and 17 together.

In the'lamp illustrated in Fig. marked Ste 17 are equivalent to those so marked in Fig.2. The magnet 5 is as before normally excited by a Winding indi-. cated in this figure by 24 and can also be excited bya second winding 25 terminating in a contact 22. 26 is a contact arm adapted to move. about a pivot and provided with a tail 27 in'the path of abutments 28 and 29 If acarbon burns 3, the parts moved by the chain 8. Exactly in the same manner as in Fig. 1 a rush of curre t will cause the disk 3-to move anticlockwise thus lifting the ob ain .8 and causing the abutment 5 28 to strike the tailf27 thus moerating the contact arm and moving it against the contact 21- sWitching in the auxiliary \vinib ing 25. The magnet 5 is now energized by its two wini'lin'gs causing the disk 3 to retate clockwise. lVith the normal lamp current the length of the arc Will now be per-.

manently reduced and therefore the lamp will give less light than before. W hen the lamp is switched out the carbon clutch 9 falls and the abutment 29 strikes the tail 27 of the contact arm 26 thus moving it away from the contact \Vhen the carhome are consumed the contact 13 will come against the contact 17 and thus switch out the lamp.

Fig. 42 is a modification oi" the lamp shown in Fig. 3 contacts are avoided. -.Similar figures indicate similar parts. 19 is a lever arm pivoted at 20 and carrying the ,core 21 of a solenoid 23. Vllhen arush of ciixgrent is sent the, disk 3 rotates anticlockwise and the contact arm 13 raises the lever arm 19 about its pivot so making contact between the arm carrying so the core 21 and the Contact Current can now pass through the Winding 25 and the solenoid 23 'inseries ith-it. This has for effect to rotate the disk clockwise and to hold the core 21 in position thus permanently-shortening the arc and diminishing the light.

When in the claims I speak of altering the-light given by the lamp, I mean either extinguishing the lamp or decreasing or in- 40 creasing the light given by it.

' What I- claim is 2- 1. In an arc lamp system, a plurality of lamps in series, certain of said lamps being provided with means operated by the elec- 4-5 trode feeding mechanism for altering the amount of light given by the lamp on a change of current from normal, means for supplying a current of normal strength to the series of lamps and including means for momentarily varying the current from normal to operate said light altering means.

.2. In an arc lamp system, a lamp having electrode ft'eeding means, said means including-a main lamp magnet, means operated by the electrode feeding mechanism'for altering the amount of light given by the lamp on a change of current from normal through said magnet, means for supplying a cuz-"ent .ofnormal strength to the series of lamps and 10 including means for momentarily varying the current from normal to operate said light altering means.

T 3. In'lan arc lamp system, a plurality of series, electrode feeding means for in which mechanically operated lamps, certain of said lamps. being provided said lamps. said means including a pair of magnets and a movable member operated thereby, certain o'l' said lamps being provided with means operated by the electrode feeding mechanism for altering the amount of light given by the lamp on a change of. current from normal, means for supplying a normal current to the series of lamps and including means for momentarily lllyll'lg the current from normal to operate said light altering means. l. In an arc lamp system, a plurality of lamps in series, electrode feeding means for said lamps, said means including a pair of magnets and a movable member operated thereby, certain. of said lamps being provided with means operated by the electrode feeding mechanism for altering the amount of light given by the lamp on a ,change of current from normal, said means comprising a s vitch member operated by said movable member, means for supplyinga normal current to the series. of lamps and including means for moi'nentarily varying the current from normal to operate said light altering means.

In an arolamp systemy'a plu ality of lamps in series, electrode feeding means for said lamps including a pair of magnets, certain of said lamps being provided withmeans operated by the electrode feeding means for changing the strength of current through' one of said magnets for altering the amount of light given by the lamp on a change of current from normal, means for supplying a current of normal strength to the series of lamps and including means for momentarily varying the current from normal to operate said light altering means.

(5. In an arc lamp system, a plurality of with means operated by the electrode feed ing mechanism for altering the amount of light given by the lamp on a change of current from normal, said means comprising a switch, means-for supplying a current of normal strength to the series of lamps and including means for momentarily varying the current from normal to operate said light altering means.

7. In an arc lamp system, a plurality of lamps, certain ot-said lamps being provided with means operated by the electrode feeding mechanism for altering the amount of light given by the lamp on a change of current from normal,'said means comprising, a 1 short circuiting device, means for supplying a current of normal strength to the series of lamps and including means for momentarily varying the current from normal. to operate said light altering means. 125

' 8. In an'arc lamp, electrode feeding mechanism comprising a'series and shunt dnagnet, and a pivoted member movable in one direction by vthe series magnet to e'parate trodes, upon the pasfisl ge of current above the electrbdes; and movable in the other dithat which separates-the electrodes at normal 10 rectio'n by the slgimt magnet to feed the elecd: arcing distance. trodes, a move e switch member operate 6b? said pivoted member, a switch contact in WILHELM DIETZ' position tO be engaged by the movable switch Witnesses: member" on movement of the feeding mech- -R-IGHA2?!) FRETZDORFF, anism in e, (iirection to separate the elec- PAUL HEYGK.

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