US446109A

US446109A - Arc light

Info

Publication number: US446109A
Authority: US
Publication date: 1891-02-10
Anticipated expiration: 1908-02-10

Description

Gm. 5 Wwf w M M www m @ma S'Sheets-Sheet 1.

Patented Feb. 10,1891.

R. H. MATHHE.

ARG LIGHT.-

(N9 Model.)

(No Model.) 3 Sheets-Sheet 2.

R. H. MATHBR. ARO LIGHT.

N0*l 446,109. Patented Peb. 10, 1891.

2y 28 fa Mmmm @www www (No Model.) 3 Sheets-Sheet 3. R. H. M'ATHBR. ARG LIGHT.

Patented Peb. 10,1891.

ex R run" co., Pu wksuwcrcu, n. c.

UNITED STATES PATENT OEEICE.

RICHARD ll. MATIIER, OF IYIDSOR, CONNECTICUT.

ARC LIGHT.

SPECIFICATION forming part of Letters Patent No. 446,109, dated February 10, 1891. application filed October ll, 1886. Renewed October 27, 1890. Serial No. 369,398. (No model.)

To (//ZZ 07mm 'it 71mg/ concern:

3e it kn own that I, RICHARD H. Mx'rnnr., ot lYindsor, in Hartford county, Connecticut, have invented certain new and useful Improvements in Electric-Arc Lamps, which are described in the following specification and illustrated by the accompanying drawings.

This invention includes a feeding device for the carbous of an electric-arc lamp,and.com prises a reversible electric m otor, a compound switch which controls said motor, and intermediate mechanism whereby positive motion is transmitted from said motor to one of said carbons.

The best mode in which I have contemplated the application of the principle of my invention is shown in said drawings, in which- Figure 1 isa vertical section of my improved lamp. Fig. 2 is a top View of the same, the cap being removed. Figs. 3 to 7, inclusive, are details. Fig. S is a diagram showing the course of current through the various parts of the lamp.

In the views, the numeral 1 denotes a castiron cylindrical

box having ears

2 and 2, by which the box and dependent lamp may be Asuspended in the position shown in Fig. 1.

This box is provided with bind ing-posts 3 and l, which are the positive and negative terminals of the lamp, resjiiectively, and with a removable cap 5, which covers the otherwise open top of the box. 'Project-ing outward and downward from box 1 and skirting its solid i'loor or bottom t5 is an annular 'flange 7, which externally presents the form of a frustum of a conc. This box is also provided with two bosses S and S, which project and open downward from floor (l within `flange 7. IVithin this box is an electric motor, which is pret'- erably of the general description exhibited in my application, No. 200,929, for a patent upon au electro-mechanical movement filed May 3, 1880. The held-magnet of this motor comprises two limbs, which are wound as an electro-magnet in the usual manner with helices 9 and 10, respectively, and two polepieces, which are adjacent to armature 1l. The latter is mounted in the usual manner upon a shaft which is journaled in said fieldmagnet and in a yoke 12, which is bolted thereto. The com mutator 13 is mounted upon said shaft in the usual manner between the limbs of the field-magnet aforesaid. Brushes 1l and 15, which allow commutator 13 to ro tate in either direction, are held in proper positions otl contact therewith by their respect ive brush-holders 1G and 17 ,which are bolted to opposite sides of said field-magnet, but are insulated therefrom. Said armature-shaft terminates in a worm 18. This motor maybe attached to door G by screws, as shown in FiO. l. W'ithin the same box 1 and similarly attached to floor G is a switch, which is shown in Fig. et in a central vertical section on a broken line in Fig. 2. This switchcomprisesan electromagnetof solenoid form, having

helices

19 and 20, which are wound in one and the same direction. The cylindrical core 2l of this magnet is armed at the top with a proj ectinginsulated copper contact-plate 22 and is perforated by a transverse slot Two insulated strips of copper 24. and 25 are mounted upon the switch-magnet within reach of plate 22 and upon opposite sides of the same. Athird insulated strip of copper 26 is similarly mounted just below copper 25. A lever 27, which is centrally pivoted in a standard rising from the top of the switch-magnet, enters slots 23, and being` provided with a terminal spring 28 tends to litt core 21. Similarly attached in box 1 is a similar' solenoid electronnagnet 2), which is shown in Fig. il as a central vertical section upon a broken line of Fig. This magnet has a single helix 30 and a cylindrical core 31, which is perforated by a transverse slot 32, and is armed at the top with a projecting insulated copper contact-plate Upon magnet29, just above and within reach of plate 323, is mounted an insulated strip of copper 3ft. A lever 35, which is centrally pivoted in a standard rising from the top of magnet 20, is provided with a spring 3G, which tends to litt core One end of this lever passes through slot 32, while the other end of the same forks laterally in two branches, between which is pivoted collar 37. In the same box is the upper portion of the feedingrod 3S, which is a straight bar of brass passing loosely through collar 37 and provided with a terminal fixed collar or stop 39. This rod is journaled in the two arms of a double standard 40, which is attached by screws to IOO the field-magnet of said electric motor. A

worm-wheel 41, having a slotted hub 42, is mounted loosely upon rod 38 between the arms of standard 40 in a position of constant 5 engagement with worm 18. A pin 43, projecting radially from rod 38, is radapted to travel from end to end of the slot in hub 42. The electrical continuity'ot rod 38 is `interrupted by an insulating-joint 44, which is xo shown in longitudinal sectioninFig. 5. lThis joint is preferably constructed` inthe .manner exhibited in David lVilliamsons application, Serial No. 195,797, fora patent on insulatingjoints, tiled March 19, 1886. According t that r :manner-.of yconstruction: said rod isy divided irinto two, portions, one ot which iszarmed with a".tixedrterminalcollar .46,while the Yother is reduced to. the; form ot'fatongue 45, which is fpifotlidedwvith afterfminal'screwfthread. vThis zo tonguefpassesl through. collar. V46aand `is sepa- "vratedtherefrom" by. air indefinite .number of 'mica'fdisks'xor washers i and @byan- 'interme- 3 Saper end'of'- each tube 52'is inserted inaboss i8 a at the; bottom-offbox 1,-v and 4is held-therein byia set-screw. The' lowerz end 'of` each tube 152'fissiniilarlv insertedI and'fheld'fin one end otyokei. '.lhe-middle `part of this-yoke 4o' vcontains f, anA insulated 1 carbonholder, which .'is'fshowu'invertical sections in Figs. 1 and 7. Thisl'carboneholder consistsot-a metallic tube 5.4,'1swhich .is.op'enat`-both =ends,is provided V '.wit-hna stopftiange556x211'.y the; top,rv and with; an

4 5 a'insulatedfset-screw 57, andis separated from l.yokev by a: sleeve 155,-which is of-similar "for-ms and of `insulating .,fmaterial. A sliding Ayoke-'60 is 'formed' on tubes 52'by ymeans of two likefmetall-ic sleeves 59 andan "interme- 5o.l diate -cro'ssfpiece 58. This crosspiece is rigidlyl'joined'- to..eachcot`1said sleeves-and isv inf snl'ateditherefrom by the-suse'of V-mica washcrs,applied in, theE manner illustrated in Fig. 1. Thisyoke is providedzwith av central car- 5 5 Vbong-holder:61: for the upper carbon "of the flamp. YokeffGO .-fis f also yprovidedwith adevice"'foreecti.ng an engagement with the vfeeding-rod 38. This L engaging device conzsists of; a ltubular enlargement ofyoke l60 and 6o sliding en gagement-block 62 in closed there-l gagement between said block 62 and rod 38.

This block is hollow and contains a cam 65,

and24 are-alsoheld inmutual contact. It now in this position y .of affairs' a normal. current be supplied from the generator, that current passes from terminal 3 in two principal courses as follows: One portionaof .said curwhich is pivoted in-said yokeand is provided with a finger-piece 66 and a spring 67.

-coarse wire 69 with copper .24.and by coarse wire4 70 with -helix 9. Brush-holder V`16 is connectedwvith helices 9 .and 10 bycoarse wires 71- :and vv 72, respectiyely. Helix l0 is con nectedfby coarse wire 73 with helix 30, and 8 5 that'I helix is-connected bycoarse 7 4 wire with lbrush 50. '-'Helix 10 Ais also connected through wire 73;-andbyfa coarse wire .-75t branching therefromA with helix 1i), -which is, yconnected by. eoarsewire 7 6..with'copper 34. Terminal 9o 4 is connected with holder 86 by wire 7 7and' with contact-plate v33. by wire y7 8. I Copper 25 `is connectedvbywire 79.with-wire 73. Cop- :-per 26 is-connected bywire 80 withbrush 50, and copper 22 by wire l81 Withg'holder 95 17. Helix is connected -with terminals 3 and. 41 byline-wires 82 .and 83, respectively.

Byvmeans'of terminals 3 and 4the lamp is placedfin circuit with a generator in the usual manner.

IOO This invention further presentsl all other features and particularsof construction which yare'necessarilyinvolved in itsfmode ,of` Voperation, which is nowto be explained.

AVthenno current issupplied tothelamp, lever-3-oceupies the positionshown in` Fig. 3, and plates -33-.and 34vare consequently in mutual contact. 4At-the same time leverVA 27 isdefiected to such a position thatplates 22 IOS IIO

rent passes bywire 69 to copper 24, the-nce immediatelypto copper 22; thence bywire 81 to jholder 17, kthence successively through rbrush 15, commutator. and armature 13: and

11,1-,and brush 14 to holderv 16, and thence in the course hereinafterA described. A 4second portion ofsaid current. passes from terminal 3 through wire70, helix 9,-wire 71 to holder 16. The currentso conducted in two courses -toholder 16 goes thence through'wire 7 2and helix 10 towire 73 and there dividesinto two parts, one of which.l goes on through helix '30, wire 74,r brush 50,rod 38, yoke 60,--4carbons 84 Aand-85, and wire 77 to terminal 4, while the r other part ypasses successively vthronghfwire 75, helix,19wire 7 6, coppers 34and 3.3, and 13o vwire78-to the same terminal 4. VAtthesame time `an in'appreciable pai-tof the current which is supplied passes between said terminals by the

wayof wires

82 and 83 and helix 20. lhis distribution ot current, however, is but momentary. For the passage ot current through the motor the switch-magnet and the lifting-magnet energize those devices in the following manner: The action of magnet instantly causes the above-inentioned portion of current passing through helix 19 to be 'interrupted between plates 33 and 3l. Lever 35 of magnet 2) then comes into engagement with stop-collar 39 by means et collar 37, and thereby lifts rod SS, sliding yoke GO and carbon Si u ntiithelatter is separated from carbon S5 by a distance which is slightly greater than their normal separation. Under the action of helix 2O ot the switchmagnet copper 22 is separated from copper la and brought to contactwith eopper25. This interrupts the current which flowed in the above-delineated course through armature ll and allows a current to pass from holder 16, through brush 14E, through armature and

commutator

11 and 13 in a reverse direction, and thence successively through brush 15,liolder 17, wire Sl,coppers2 and 25, and wire 79 to wire 73. Said motor acting upon rod 238, through worm 18, worm-wheel il, slotted hub a2, and pin 43, rotates that rod in such a direction as to move yoke G0 downward, and this down ward motion continues until the separa-tion et' said carbonsis reduced to the normal length oi' the are for which thelam p isadjusted. Through the diminished electro-magnetic eiiiciency ot' the switch-magnet the mutual contact of

coppers

22 and 25 is then in turn interrupted and the motor stops. It the carbons should be at a distance from each other when the lamp is started up, the upper carbon will be carried downward as far as may be necessary, in the manner last described, and with the saine result, and whenever during the operation of the lamp the carbons become unduly separated through the ordinaryconsumption of the same or through any other cause the consequent increase ot' resistance in the ear bon-circuit so increases the current through helix 20 that coppers 22 and 25 are brought together again, and the motor is again brought into operation in the same manner and with same eftect as before; but whenever the carbons approach too near to each other the electro-magnetic etiieiency of the relay-magnet is reduced, contact is made again between coppers 22 nd 2l, current passes again through arma-ture l1 in the course first above described, the motor is reversed, the upper carbon is thereby raised, andthe normal separation of the carbons is thus restored.

It any stoppage occurs during the operation o't the lamp and the carbons consequently remain unduly separated, the energy exerted by the relayanagnet is increased, and copper 22, pressing downward with unusual torce upon the top of copper bends the latter to a position ot' contact with copper 2U. The current from wire 73, through helix and wire 7i to brush 50, is thus short-circuited by the way of wire 79,'coppers 25 and 2U, and wire SO to brush 50, and lifting-magnet 29 is inactive. Copper 33 consequently rises to contact with copper 34, and thus the carbon current is shortecircuited through the armature and the field-magnet helices of the motor and through relay-helix 19. The re lay-magnet then holds

coppers

25 and 22 in mutual contact, as above described, and the carbon current remains short-circuited, as described, so long as the stoppage continues.

It through accidentor heedlessness the upper carbon having run by should be found partly side by side with the lower carbon when current is supplied to the lamp, the motor will feed backward until the carbons are duly separated in the manner already described.

ln this improved lamp carbons ot double length can be used in a frame of ordinary dimensions. At the same time the separation and approach of the carbons are eiiectcd by a positive motion and are controlled with great delicacy and precision.

llaving described the construction and operation ot my invention, l now claim- 1. In an electric-arc lamp, a movable carbon-carrier, a reversible electric motor whose held-magnet is excited by two helices in series and whose armature is located in a derived circuit, and a compound switch having' separate connections with said armature and with the held-magnet circuit upon opposite sides ot the field-magnet, in combination with mechanism for transmitting motion from said armature to said carrier, substantially as and for the purpose specified.

E. In an electric-arc lamp, a carbon-carrying slide, a rotary electric motor whose 'fieldmagnet is excited by two helices arranged in series, a two-point switch having one ot its points connected tothe circuit on one side ot' said helices and having the other ot' said points connected to the circuit on the other side of said helices, and a connection from the switch to the circuit containing said helices at a pointbet-ween the latter, said connection containing the armature ot' said motor,in combination with mechanism which is adapted to convert the rotary motion et said armatureinto rectilinearmotion et said slide, substantially as and lor the purpose spccilied.

ln an electric-arc lamp, a carbon-carrier, a reversible rotary motor having two fieldmagnet helices, and an electro-magnet and an armature thereof provided with suitable contacts and connections whereby the armature of said motor is connected in series with one and in parallel with the other of said helices or in parallel with the former and in series with the latterot' said helices, or is dis connected from both, according as the armature of said electromagnet is moved to a pre` determined limit in one direction or in the other direction, or is not moved to suchlimit,

IOO

in combination with mechanism which is .adapted to convert the rotary Vmotion ot the .armature ofsaid-motor into -rectilinear motion of said carrier, substantially as and for the purpose specied.

4.1111 van ,electric-arc lamp, la vfeeding-rod which is provided Vwith a-screw-thread and an engagement-pin, in combinationwith .a` carybon-carrierwhich engages saidithread, and :0-a wheel having a slotted hubiwhichcengages 'saidj pin, substantially as and for the `purposes specied.

5. Iii-an electric-arc lamp,a sliding yoke whichfhas two4 sleeves joined and held rigidly parallel by anintermediate cross-piece-which is insulated from each of said sleeves and is provided with a carbon-holder and with mechanism for engaging a feeding-rod, substan- .rtially as and for. thepurpose specified.

6.- Inaan .electric-are lamp, a reversible ro- V.tary=motor,;a .feeding-rod which is provided 4with .a screw-thread, :intermediate gearing whereby said. motor constantly engages said feeding rod, anda lifting-magnetwhichis-ap- 2 5 pl-iedtosaid feeding-rod, in;combination-with a sliding-yoke having two sleevesjoined and :held rigidly parallel by-an intermediate cross- .piecc whichfis.insulated lfrom each ot r.said sleeves and is provided witha carbon-holder 3o andwithV a-spring-seated engagement-block foriengagingsaid feeding-rod by means of said screw-thread, substantially as and for the vpurpose specified. .7. Inan electric-arclamp,.a four-contact 3 5 switch --whose actuating` magnet is wound with two helices arranged in parallel with each other and: with vthe -carbons ofthe lamp, substantially as and for-the purpose specified. -8. .In anelectric-arc lamp, a rotary feeding- 4o rod-which is divided into two partsby means otaninsulating-joint, in combination with rotating mechanisnrwhich engages one of lsaid parts-,and carbon-carrying mechanism -andian electric brush Vwhich-are in contact withthe other of saidy parts, substantially.v as

andfor the purpose .specied 9. I-n anelectric-arc lamp, a pair otcarbons, a stationary'carbon-holder, a movable carbonv carrier; a reversible electric motor, a feedin 5o `rod whichhas a screw-thread engaging said carrier, intermediate gearing whereby said motor engages said rod, a four-contactswitch whose actuating-magnet is wound with two ,helices arranged in paral-lel with each other 555and-fwith said carbons, a liftingrmagnet, and .a switch operated thereby, which opens and vcloses the circuit-connection of one of said helices, in Ycombination with a lever engaging said feeding-rod and the armature of said lift- 6o fing-magnet, substantially as and for the purpose -speci-ed.

-10. In an electric-arc 1amp,.carboncarry ingvmechanism, a reversible yelectric lmotor k'actuating said mechanism, and a three-point switchhav'ing two helices which arelocated in-separate shunts about. thecarbons otsaid lamp, in combination with afmainfcircuitlifting-magnet vprovided with `,circuitfbrez'tking mechanism which isapplied' to one v-of lsaid vshun-ts, substantially. as and for the purpose specified.

1l. In an electric-arc lamp, carbon-moving mechanism, a reversible motor working said mechanism, a three-point switch controlllng said motor and having two helices, oneofsaid helices being composed .of fine. wire.. andlorcatedina constantly-closed shunt-circuit yabout the cal-bons ofthe lan1p,.an`d,the other Yof said helices beingcomposed of coarse wire and located in .a shunt-circuit about said carbons, in combination with va liftingfmagnet provided .with circuit closing ,mechanism `which is, applied to the last-m entioned Vshuntcircuit,substantially asv and for the purpose specified.

12. In an electric-arclamp, a movablecarbon-carrieigan electricL motor whose...eld

magnet yis excited by two helices infser-ies andwhose armature 4is located ina-'derived circuit,y and, gear mechanism engagingsaid armature andusaid'carrier, in combination with a vfour-contacty switch l.whose actuating magnet is-wound with two helices. severally arranged in parallelwith the carbonsotthe lamp,.substantially as and -t'orf the purpose specified.

`are located in separate shunts about the carbons of the lamp, in ,combinationwith a ycir-. cuit-breaking mechanism whichy is applied to one of isaid shunts, substantially as and for the purpose specified.

14. In an electric-arc lamp, a. movable carbon-carrier, an r.electric motor whose vrfield.- magnet .helices are yarranged vin seriesv and whose armature is located in. abranch circuit Lconnecting withthe .field-magnet c-ircuitat a pointbetween said.helices, and a compound switch controllingsaid motor and having'two .helices which are located in separately-derived circuits about the car-bons of thelamp, in

i combination vwith a-liftingFmagnet andra circuit-breaking mechanism which is applied to .one of said derived circuits, substantially. as

and for the purpose specified.

In testimony whereof I` have hereunto set mynamelinthe presence ottwo witnesses.

vRICHARD H. AMATHER.

Witnesses: Y

y WILLARD Enma'i W. M. BYORKMAN.

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