US1094745A - Electric incandescent lamp. - Google Patents

Description

J. W. PHELPS. ELECTRIC INCANDESGENT LAMP. APPLICATION EILED PEB.17, 1904. RENEWED HA3. 5. 1914.

Patented Apr. 28, 1914.

2, is screw-thr aded to engage th a UNITE- Ja s WILEY names, or. nnriaorr, monrean, assrcnon, BY MESN-E ASSIGNMENTS,

ro'ennnnar. ELECTRIC COMPANY,

A CORPORATION OF NEW YORK;

nnnornro INCANDESCENT LAMP.

Specification of Letters Patent.

Patented Apr. 28, 11914.

Application flied February 17, lebeflierial No. 193347. Renewed March 5, 1914. Serial No. 822,764.

I '0 ME whom it may concern:

Be it known that 1, JAMES W. Pnnnrs, a citizen of the United States, and a resident of Detroit, county of Vayne, and State of Michigan, have invented certain new and useful Improvements in Electric Incandescent Lamps, of which the following is declared-to be a full, clear, and exact description.

The invention relates more particularly to electric incandescent lamps having two or more incandescing filaments or filament sections arranged to emit light of difi'erent intensity, and the improvement seeks to provide a simple. and eiiective form of such a lamp which requires no special form oflampholder, but may beemployed for those already in use and-having asimple and easily operatedswitch mechanism.

In the drawings, Figure 1 is a longitudinal section of the improved lamp with the switchshownat the extreme end of its shift in one direction. Fig. 2 ,is a similar yiew withthe switch shown at the extreme end of its shift inth opposite direction. Fig. 3 is a iongitiidinal section of the upper part of the lampillustrating a modification. Fig. i is a cross section on line 4- ofFig. 3 with the filaments and terminals diagrammatically illustrated.

The base the. ,lamp may be designed for use in connection withany of the wel known lamp-lnilders. i I the form "show in Fig. l the lamp base is apted ear the dison' t ,pe of holder while the form illustrated in Fig. 3"is arranged for the Ediswan lamp-holder. The base or cap; preferably comprises separatecylindrical metal sections lOand 11 titted one within the other secured together in any suitable manner. The glass globeof vacuum bulb 12 is secured wihhin the outer end of the base, 10 by a suitable composition filling 13, while the upper base section 'ljl, shown inFigs, 1 and ro ies" threads the Be e? l mnh der on forms one" thela np-terminals for the reception of current from the lam holder. A porceiaindislr 1% is secured w thin the outerend of thebase section 11 carries aipcentral terininalio i or the reception oi current from the central terminal oir'the lanip hoider. D

The switch mechanism is preferably mounted within the base of the lamp and for this purpose, a thin insulating plate or supmount 16 by a rivet 19. This switch-arm is conveniently formed of a fiat piece of sheet brass or copper and is provided with an upturned, end 20 to which the flexible operatin' cords 21 are connected.

T e flexible operating cords extend in opposite directions through guide ferrules 22 fixed within diametrically opposed openings in the upper portion of the base section 10; These openings are located as shown, below the pivot point 19 of the switch and opposite the lower arm of the switch to which the operating cords are attached, so that by pulling on the cords the switch may be shifted to one or the other extreme positions shown in Figs. 1 and 2. The flexible cords 21 hang down from the lamp within convenient reach.

Contacts, preferably in the form of flat plates 23 and 2 1, are secured to the face of the'insula'ting support 16 on opposite sides of the pivot of the switch and are adapted to be engaged by the lower and upper arms respectively of the switch 18. These contacts are so disposed with reference to the switch that, as the latter is shifted from the position shown in Fig. 1 to that shown in Fig. 2, it will first engage the contact 23 and subsequently the contact 24. They are however, also so disposed that when the switch engages the contact 24 it will still be in en agement with contact 23. That is to say t -e relation of the parts is such that the bg'WlilClh 18 will only make and break eng'ag'ementwith the contact 24: while it is in engagement with the contact 23.

The lamp is provided with two incandescing filaments or filament sections 25 and 2b which are preferably of diiierent candle power and arra-nged as shown, one above the otherin the vacuum bulb 12. The filaments or filament sections are connected as shown, in series, The endof the high power filament 25 is connected by the leading-in wire tilt '29 with the contact 24. The switch 18 is connected by the conductor 30 with the lamp .terminal 15. The arrangement and connec- -tions ot the filaments may be varied, but that above described is the preferred arrangeinent.

The lamp is designed for use with electric lighting current of constant or fairly constant potential and filament 26 of low candle power has a higher resistance per unit of length than the filament 25 so that when the current is passed through both filaments in series the low power filament 26 will alone glow with small candle power while the high power filament 25 acts asa relatively darh resistance and thereby consid' erably cuts down the amount ct current used. l/Vhen the low power filament 26 is short-circnited by the switch, the

power filament 25 will glow with full candle power 'lt will be seen that, in position shown in Fig, 1, the current to the filaments of the lamp is entirely interrupted and the lamp will remain dark. its the switch is shitted in one direction to the position drown in 2, it will successively engage the contacts 23 and 24.. Assoon as it' engages the contact 23 the current will pass from lamp terminal by leading-in wire 30, to switch 18 by contact 23 and leadingin wire 28,

through the filaments 26 and in series by the leadin -in wire .2? :to the other lamp terminal. the low power filament will then glow with small candle power as above described. Upon further movement of the switch in the same direction, it will engage the contact 241: and the current will pass through. the high power filament alone "Irom terminal 15, by leadin -in wire 30, contactand ca 18 leadi' in wire 22 through the ower filament 25 alone and baclr terminal by the leading-in 'a position the low power filad or short-circnl since when the switch makes and breaks with the contact 24, since this operation merely serves to close and open a short-circuit around the low power filament. In this way, the simple noiseless form or switch shown can be safely employed. Preferably, the switch is provided at its opposite ends wit-h punch marks 31 to form raised portions upon the lace ot the switch which engages the flat contacts 23 and 2%, so that good contact may be made therewith.

' The form of lamp shown in Figs. 3 and lis adapted for use in connect-ion with the Ediswan sockets or lamp-holders. For this purpose the base section 11 is provided with oppositely extending projections 32 adapted to engage with the bayonet slots of the Ediswan lamp-holder and the porcelain disk It at the end of the base, is provided with two terminals 33 and 3% for engagement with the corresponding terminals of that type of lamp-holder. The insulating support for the switch is in the form cat a disk 16 ot' fiber or other. suitable material and rests, as indicated, in horizontal position upon a ledge 17 in the lower basesection 10. The arrangement of the switch 18, cont acts 23 and 2t and filaments 25 and 26 is similar to that shown in Figs. 1 and 2. The

switch 18 is connected by leading-in wire with the lamp-terminal 3t, and leadingin wire 27" extending through an opening the disk 16 connects the end of the high power filament 25 with the other lamp terminal 28.. The end of the low power filament 26 and the oined ends of the filaments are respectively connected by the leading-in wires 22 and 29 with the contacts 23 and 2t,v

as in the form shown in Fig. 1.- it will be noted that the switch -18 is pivoted on the dish 16' to one side of the center and to one side of the diametrical line between the openings through which the operating cords 21 pass so that-the switch may be shifted by the cords to and from the position shown in 4;. As the switch is shifted iiroin such position, itwill first engage with the contact 23 and then with contact 24, so that the lamp will first glow with small candle power and then. with ll candle power. @n the return movement of he switch the lamp will first be turned do: and then out. [is

"he form previously d scribed,

arranged z W 23 and are only in break t eections e rip e :rorm

n a :3 t (which is con memes Having described my invention, what I claim as new and desire to secure by Letters Patent, is z 1. In" constant potential electric lighting,

the combination with an electric incandescent lamp having two incandescing filaments connected in series, the resistance of which being so proportioned that one glows and the other acts as a relatively dark resistance when the current flows through them in contacts being relatively s0 arranged that said switch member will make and break engagement with said second contact only when in engagement with the other of said contacts.

2. An electric incandescent lamp having two filaments in series, a base for said lamp provided withmeans for detachably engaging a lamp holder and with terminals for the reception of current therefrom and a switch carried by said base comprising a movable switch member connected to one of said terminals and .a pair of contacts connected. respectively to the end of one of said filaments and to the joined ends of said filaments, said switch member and switch con tacts being relatively so arranged that said switch member will make and break engagement with said second contact only when in engagement with the other of said contacts.

3. An electric incandescent lamp having a plurality of filaments, a base secured thereto and provided with means for detachably engaging a lamp-holder, an insulating support within said base, a switch arm p voted to said insulating support and connected to one of the lamp-terminals, separate contacts on said insulating support arranged to be successively engaged by said switch arm and connected respectively to the end of one or i said filaments and to the joined endsof said filaments, said switch and switch contacts being relatively so arranged that said switch member will make and break engagement with said second contact only while in engagement with the other of said contacts and flexible operating cords connected to said switch and extending through guide openings in the sides of said base.

a. An electric incandescent lamp having a base provided with means for detachably engaging a lamp-holder, an insulating plate within said base, a switch-arm pivoted between its ends to said insulating plate, separate contacts on opposite sides of said pivot arranged to be. suitably engaged by said switch, operating cords connected to said switch-arm and guide openings for said cords on the sides of said base arranged out of line with said pivot.

5. An electric lamp comprising a bulb having a hollow stem, a base at the neck of the bulb, an insulated post carried by the base and conducting the current from the socket carrying the bulb, a series of insulated leading-in wires extending from the base through the stem, lighting filaments having each one endin electriccircuit with a corresponding leading-in wire, their opposite ends coupled to a common wire in electric connection with the base and a swinging arm or switch mounted about the post and adapted to successively engage the terminals of the leading-in wires. (5.111 an electric incandescent lamp having two filaments, a base secured to said lamp having means for detachably engaging a suitable lamp holder and having terminals for the reception of current therefrom, said base being formed of separate cylindrical metal shells one fitting within the other and permanently secured together, an insulating support within said base, a switch arm and contacts all mounted on said support, connections leading from the lamp terminals to said filaments and to said switch arm and contacts whereby the movement of said arm will control and modify the flow of current through said filaments and flexible operating cords connected to said switch arm and extending through guide openings in the wall of said base, substantially 'as described.

'7. An electric incandescent lamp having a base'provided with means for detachably engaging a suitable lampholder and terminals for the reception of current therefrom. an insulating support within said base, a switch arm pivoted to said insulating support, separate contacts also mounted on said common support arranged to be successively engaged by said switch arm and flexible operatiugcords connected thereto and extend ing outside of said base.

8. inelecti'ioincandescent lamp having a base provided with means for detachably engaging a suitable lamp holder and terminals for the reception of current therefrom, said base being-formed of separate sections permanently secured together, an insulating support within said base, a movable switch member and contacts all mounted on said support, and flexible operatingv cords con nected to said switch member and extending through guide openings in the wall of said base. substantially as described.

9. An electric incandescent lamp comprising a bulb having a hollow stem, a base at the neck of the bulb comprising inner and outer cylindrical metal shells secured to- Elli outer shell a central lamp terminal on said insulating dislr, two filaments Within said bulb, a switch interposed between and electrically connected to said filaments and said lamp terminals and comprising a pivoted switch arm and a pair 01": contacts arranged to be successively engaged by said switch-a1'n1, said. switch-arm and contacts being arranged Within said base upon a corn noon insulating support, and flexible operating cords connected to said switch-arm and extending through openings in the inner portion of said base substantially as do scribed. v

, 10. lln constant potential electric lighting,

the combination. With a suitable lamp holder,

of an electric incandescent lamp having two filaments connected in series, the resistance of which is so proportioned that one glows and the other acts as a relatively dark sistance when'the current tloWs through the filaments in series, a for said lamp having means for detachably engaging the lamp holder and terminals for the reception of current therefrom, the free end of one of said filaments being connected. to one ct said lamp terminals, a switch member mounted on the lamp base and connected by the-other lamp terminal and a pair or? contacts mounted on the lamp base and connected respectively to the tree end of the other filament and to the joined ends of said filaments, said switch member being arranged to successively engage said contacts as it is shifted in one direction, substantially as described.

11. tor electric incandescent lamps comprisingmeans for detacliably engaging lamp holder, an insulating "plate Within said base, a switch-arm pivoted between its ends on said insulating plate, separate contacts on opposite sides, of said pivot to be suital'ily engaged by said switch, operatnoaegree ing members connected to said switch-arm, and guide openings tor said members on the sides of said base arranged out of line With said pivot.

12. A base for electric incandescent lamps comprising means for detachably engaging a suitable lamp holder and terminals for the reception of current therefrom, an insulating support Within said base, a switch-arm pivoted on said insulating support, separate contacts also mounted on said common support arranged to be successively engaged by said switch-arm, and operating members connected to said switch-arm and extending outside oil said base.

13.. rl base tor electric incandescent lamps comprising means for detachably engaging a suitable lamp holder and terminals tor the reception oicurrent theretrom, said base being formed of separate connections perinanently secured together, an insulating support Within said base, a movable switch member and contacts all mounted on said support, and operating members connected rill (iii

to said switch member and extending inside off said base.

it. A base tor electric incandescent lamps carrying terminals and comprising therein an insulating support, a movable conducting switch member connected to one of said terminals and mounted on said support, arate contacts also mounted on said support and arranged. to be successively engaged by said switch member, the aforesaid parts being relatively so arranged that said switch member will make and break engagement With a certain one of said contacts only n'hile in engagement with the other of said contacts. a

and Willi; if renters.

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