US1171193A - Arc-lamp. - Google Patents

Description

C. A. B. HALV0RS0N,1R.&1. BEE-CHLYN.

' ARC LAMP.

APPL'ICATXON' FILED APR. 3. 1912. l

l Patented Feb. 8,1916.

3 SHEETS-SHEET l.

' JohnTBf-zechl'gn, /Z L f be M44, m;

' l Theirfttorneg THE COLUMBIA PLANOGRAPM C0., WASHINGTON. n. c.

C. A.B. HALVORSON, Jn. & J. T. BEECHLYN.

ARC LAMP.

APPLICATION FILED APR.3,1912.

1,171,193. Patented Feb.8,1916.

3 SHEETS-SHEET 2.

I Witnesses: 4 Inventors:

g Qi ,x CromwellfHah/orsonn,

oN, D. c.

JohnTBeec m Their'1 t ornepg.

C. A. B. HALVORSON, Jn. l. T. BEECHLYN.

ARC LAMP.

APPLICATION .FILED APR. 3. 1912. 1,171,193D Patented Feb. 8,1916.

. a SHEETS-SHEET 3.

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Witnesses'. Inventors:

Z vp 4 4 CromvvellfllBHalvor'sonJrt, JohnT Beechlgn,

W@ 5J i THE coLuMm PLANDGRAPH co., WASHING TTTTT c To all whom t may concern:

- gerer erren- CRQMWELL A; B. riALvonsoN, J2e.,or serieus, AND JonN T. BEECHLYN, or LYNN,

MASSACHUSETTS, nssie'Nons To GENERAL nLncTnrC coivrrANY, A conronATroN on NEW YORK.

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Be it known-that we, CROMWELL A. .Bf

IHALVORSCN, Jr., vandvv JOHN T. 'BIENCHLYN, citizens of thel United States, residing, re-

spectively,` at Saugus and'at Lynn, county of Essex, State of Massachusettghave1n- I- vented ycertainV new and useful Improvements in Arc-Lamps, of which ingis a specication. j

- This. inventionjfrelates kto electric arc lamps, and especially to those ofthe luminous'arctype. i

The object of the invention is to .provide a lamp which is simple in construction, durable in service and not liable to' get-out of order.v j The features of novelty will appear from the following 4description andtheappended claims. l ln the accompanying drawings, Figure 1 is a perspective view of our improved lamp, withthe outer Casing removed;rFig.-2 is a the `followe sectional kelevation' of the working parts ofV the lamp on a larger scale; Fig. 3 isajsectionalv elevation Vtaken yat right angles to Fig. 2 Fig. t is a side elevation` of a portion of the regulating mechanism with av diagram of the circuits of the lamp; and Fig. 5 isa sectional detail view.

The frame of the lamp-:comprises a cene tral chimney lwhose lowerf end is somewhat flaring and provided with a circumferential horizontal flangev 2 from which depends a circular wall 3, preferably sloping inward sornewhat,asshown. `A canopy 4 surrounds the lchimney a suitable distance above the flange' 2, and is attached. to said chimney, as by means` of the brackets 5. The canopy extends preferablybeyond the periphery' ofl thek flange 2, to afford a supportfor the casing and globe holder, Awhich are not shown in the drawings. To the up? per end of thechimneyvis secured a spiderV 6, carrying the usual dead-eye 7 by means of which the lamp is suspended. i The upper non-consuming electrode 8 is a massive stick y' of metaLLpreferably of copper, and'is provided iwith laterally-projecting .wingsy 9 which areV secured to :insulated hangersl() depending from the flange'2. In order to give an unobstructed entrance to the chimney above these wings,the flange is pref'- erablyl arched above themon each sideof the chimney, as shown at 11. Thelower con- V sumngpelectrodeis .Suprerted by ered. ..12

l Specification of Letters Patent. if' i Appnanon mea April e, 17912. serial No. 688,180.1

ARC-LAMP.

' Patented Feb. 8,1916.

which isl provided with a nutllocated imi -mediately above a .bushing 15. VThis bushing passes through zin-opening vin a lug 111 which extends inwardly from..l the` lower edge of the circularwall 3, and at its upper end the bushingxis formed'with a flange 13 which rests'upon the lug 14E. A jam screw 16 in the upper lend of the rod 12 bearsV Vagainst a plate 17 of insulating materiall placed against the underside of the iange 2.v

Thelower end of the rod carries a frame 18, which has a guide 19for the lower electrode 2O,l and-comprises also two depending legs 21, having feet 22; The upper end of the electrode .shell is beaded to hold in. position the usual metal disk which prevents the magnetite or other electrode mixture from 22 is fulcrumed a lever 273, preferably L shaped, with its long horizontal arm pivotedY 23, so that said springs tend to lift the long arm of the lever and urge the electrode 20 upwardly. -A .member, which we khave shown as comprising .a rod or bar 26 to the upper end of whicha pin 27 issecured, is

pivoted to the lever23, and abuts, at its rupper end, 4against the electrode 20. The lower bifurcated end of the bar 26 receives the i11- ner end of the'horizontal arm of lever 23 and is piv'otedV thereto.. The upper Aend of the .bar 2,6, which is also bifurcated is connected to the legs 21 by a link 26a, the outer end of which isfpivoted between the prongs formed at the upper end of `the member 26, and the. inner end of which is pivoted betweenthelegs 21. A flat piece 261, provided with two upwardlydirected jaws, as shown in Fig. 5, is secured at the'upper end falling out. Between .theheels of thefeet l soy of the vIne1nber26 between its prongs by a y cotter ypin 28, this member rests upon thev outer end of the linkV 26a. A pin 27 Ofany suitable fusible material such. as iron or of the member 26. and between the. two jaws of the member26b which forms a Vsupport for said pini'lhe upper ends kof the lower electrode20 and of the pin 27 pass through `'steel is received betweenthe upper prongs the opening-in the guide 19,'and as they con- The pin 27 is consumed, together with the lower electrode, but much more slowly, the ratio of consumption of the pin to that of the electrode corresponding to their respective rates of movement, and is renewed with the lower electrode when the lamp is trimmed. `his pin 27 is, therefore,` virtually an auxiliary electrode, although it is not relied upon for giving luminosity to the are. lt will thus be understood that the distance of the lower electrode from the upper one is kept constant, and the arcing face of the upwardly-feeding lower electrode remains stationary.

inasmuch as both electrodes are stationary, so far as their tips are concerned, means must be provided for striking the arc. Moreover, in luminous arc lamps, a crust is `liable to form on the end of the composition electrode when it cools, and as this is of high electrical resistance, means must also beprovided for breaking this crust off when the lamp is started, in order to permit the current to iiow freely. W'e accomplish both thdbreaking of the crust and the striking of the arc by means of a lever 29 fulcrumed at 3() within the wall 3, and preferably on an insulated pin 31 depending` from the -flange 2. The free end of the lever is a ring 32 encircling the upper electrode and carrying a finger 33 which comes in contact with the lower electrode 20 when the lever is dropped to the position shown in Fig. 2, the position it occupies when the lamp is out and when it is freshly trimmed, in which case the pin or auxiliary electrode projects slightly beyond the electrode proper. The arc is, therefore, initially started from the auxiliary electrode, which, however, quickly burns away to the level of the main electrode, so that at the subsequent startings, the lever 29 drops farther down, so that the linger 33 comes in contact with the end face of the main electrode. The lever drops suddenly to this position, and the blow of the finger on the end of the electrode 2O chips olf any crust which may have formed there, so that said finger restsin good electrical contact with said electrode. The lever is electrically connected to the same side of the line as the upper electrode, so'that when the current is turned on the circuit is at once established. The striking of the arc is effected b y the electromagnet 34 whose movable core 35 is attached to one end of a beam 36, pivoted at 37 on the sides of the chimney, which said beam straddles. The other end of said beam is connectedl by 'a pitman 38 with the lever "29 at a point between the fulcrum 30 and the ring 32. l/Vhen the lamp circuit is closed, the electromagnet pulls down its core and this causes the lever 29 to be lifted, drawing the finger 33 away from the lower electrode and establishing the arc, which at once shifts 'from said iinger to the upper electrode. A dash-pot 39 is connected with one end of the beam and serves to retard the movements of the beam and the lever 29 in striking the arc, so that there is no danger of its being snapped out by too quick a motion of the finger. ln the operation of certain types of flaming or luminous arc lamps, particularly the magnetic lamp, copious fumes are emitted from the arc and a flocculent deposit is formed about the upper electrode. The movement of the arm 29 removes substantially all of the deposit from the upper electrodo. rihe beam also serves to operate the automatic cutout of the lamp, which consists of the two contacts 40, 4l located in a short circuit 42 across the lamp, containing suitable resisters 43. The contact 40 is stationary, while the other one is attached to the beam so that when the current is turned on this short circuit will be opened.

By referring to Fig. 4, it will be seen that onek side of the line is connected to the contact 4l and` also to the upper electrode 8 and the lever 29, while the other side of the line is connected to the other contact 40 through the resistors 43, and also to the electromagnet 34 and thence to the lower electrode; preferably by means of an insulated screw 44 passing through the wall 3 and tapped into the rod l2.

ln a copending applica-tion, Serial No. 573,015, filed July 2l, 1910, in the name of Cromwell A. B. l-lalvorson, Jr., is shown and claimed a combination of a lower electrode and an upper electrode with a member which embraces the upper electrode and removes therefrom any deposit that may have formed thereon, which member is provided with a pin which in its descent breaks through any slag that may have formed on the low-er electrode and strikes'the arc when the same is lifted from the lower electrode. le do not in this application claim such a combination, which is the sole invention of one of us, but only the lower electrode and the mechanism associated therewith for impelling the same upwardly.

llt will be seen that this lamp is quite simple in construction, and that the electromagnet, dash-pot and cut-out are protected from the heat and fumes of the arc by the flange 2 and the wall 3; the fumes passing freely up the chimney which is directly above the are whose stationary position is an advantage. The moving parts are few, and all are readily accessible for inspection or repair, and the lamp is compact and attractive in appearance.

l/Vhat we claim as new and desire to secure by Letters Patent of the United States, is:-

l. In an arc lamp, a pivoted lever, an electrode, means for pivotally connecting said electrode to said lever, 'an auxiliary elecsupport to said lever for guiding said electrode and said'auXiliary electrodeinto abutting engagement throughout their consumptlon.v

2. ln an arc lamp, a pivoted leveiyan electrode, means. for pivotally connecting said electrode to saidlever, a member pivoted Y to the lever intermediate the pivot of the lever and the pivotal connection of said electrode, an auxiliary*electrode carried by said member and having adiierent rate of Vconsumption in the arc from the electrode, means fory moving said lever, and means mcluding the pivotal connections of the electrode and of the auxiliary electrode support to said member for guiding said electrode and said auxiliary electrode into abutting engagement throughout their consumption.

3. In an arc lamp, a member pivoted at one end, an electrode, means iror-pivot'allyl connecting saidelectrode to said member, aA

metallic pin, means for pivotally connecting pivoted end and the pivotal connection of the electrode, means for moving said pivoted member, and'means including the pivotal connections ofthe electrode and of the auxiliary electrode support to said member sumption.

4f. In an arc lamp, a lpivoted'member, an electrode, means for pivotally connecting said electrode to said member, a pin, means l:tor connectmgs'aid pm to said member intermediate its pivoted end and the pivotal connection of saidelectrode, means including the pivotal connectionsV of the electrode and of the auxiliary electrode support to said member for guidingsaid electrode and said pin into abutting engagement throughout their consumption, and a spring lfor moving said pivoted member.

. 5. ln an arc lamp, a member pivoted at one end, an electrode, means for pivotally connecting'said electrode to said member,

a pin, means for pivotally connecting said pin to said member intermediate the pivoted end of the member and the pivotal connection ofthe electrode, a guide for maintaining said -pin and said electrode in abutting` engagement, and means for moving Vsaid pivoted member about its pivot, said pin and electrode consumingin the same ratio `as their respectiveV rates ofv movement WherebyV said electrode and said pin are moved in accordance'vvith their consumption and maintained in abuttingy engagement;

6. In an arc lamp, a pivoted member, an electrode, means for pivotally connecting said electrode to said member, a bar pivoted to said member Vintermediate the electrode Vconnection and itsoivn pivot and provided vwith la pin adapted to abut againstsaid electrode, a guide v*for maintaining said pin said pin to said member intermediate its'y and said electrodeii'n abutting engagement, and means for moving said pivoted member about its pivot, said pin and electrode consuming'in the same ratio as their `respective rates of vmovement whereby the electrode and the pin are maintained in abutting engagement throughout their consumption.

ln Witness whereof, We have vhereunto set our hands this twentieth day of March, 1912.

CROMWELL A. B. HALVORSON, JR. JOHN 1. BEEGHLYN. Witnesses:

JoHN A. MGMANUS, Jr., ROBERT SHAND;

Copies ef this patent may be obtained for five cents each, by addressing the Commissioner of lPatents.

' v 'K Washington, D. C.

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