US2021758A - Electric lamp - Google Patents
Electric lamp Download PDFInfo
- Publication number
- US2021758A US2021758A US701452A US70145233A US2021758A US 2021758 A US2021758 A US 2021758A US 701452 A US701452 A US 701452A US 70145233 A US70145233 A US 70145233A US 2021758 A US2021758 A US 2021758A
- Authority
- US
- United States
- Prior art keywords
- wire
- fuse
- leading
- bulb
- lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/62—One or more circuit elements structurally associated with the lamp
- H01K1/66—One or more circuit elements structurally associated with the lamp with built-in fuse
Definitions
- My invention relates to electric lamps and similar devices comprising a bulb having an energy translation element, or filament, sealed therein, and more particularly to fuses therefor.
- a fuse in the lamp provides this protection, although, if it is exposed to the atmosphere by disposing it in the base as has been done heretofore, difficulties arise due to deterioration of said fuse.
- An object of my invention is to provide a fuse within the lamp enclosure which will be sufliciently quick acting to break the electrical circuit before the arc has affected the glass parts of the lamp.
- Another object of my invention is to provide a fuse structure which will prevent a second arc from forming after the first arc is cut off. My fuse is also applicable to other similar devices having an electrical energy translation element therein.
- I provide a fuse which is interposed in the inner portion of a leading-in wire and consists of a wire considerably less in cross-sectional area than said leading-in wire.
- the fuse wire size is increased to the point where no premature failures occur, then it becomes insensitive and the arc is not cut off before considerable metal has been thrown off onto the bulb, with a resultant possibility of an explosion.
- the inner end of the leading-in 'wire in which the fuse is built is also preferably supported so it can not drop onto the bulb upon the failure of said fuse.
- Fig. 1 is a. side elevation of an electric incandescent lamp embodying my in- 5 vention
- Fig.2 is an enlarged elevation of the fuse thereof
- Fig. 3 is an enlarged elevation at right angles to Fig. 1 of a heat shield and adjacent parts of the leading-in wires
- Fig. 4 is a side elevation of a mulitple filament lamp em- 10 bodying my invention.
- the incandescent lamp shown in Fig. 1 comprises a bulb l0 into which is sealed a glass stem II in a portion of which are sealed leading-in wires I2 and I3.
- Each of said wires is composed of a section M, usually of copper, connected to respective sections of the base iii, an intermediate section "5 of a special composition which seals into glass and an inner section l1, usually of nickel.
- the filament i8 is attached directly to the inner end of lead wire it but the inner portion of leading-in wire I3 is composed of three sections, l1, l9 and 20, the filament [8 being attached to the end of section 20.
- Sections l1 and 20 are preferably likewise composed of 25 nickel whereas section IS, the fuse, is composed of a wire of much smaller size, nickel or an alloy thereof having more strength being preferred.
- the cross sectional area (see Fig. 2) must be considerably smaller than the remainder of the leading-in wire, as for instance, in the 500 watt lamp shown, the fuse section is of 14 mil diameter and the adjacent sections are each of 35 mil diameter.
- the fuse wire is .709 inch (18 mm.) 35 long.
- a heat shield 23 is 4 preferably provided to reduce the temperature of the base. Said shield is preferably of mica and is held in place as shown in Fig. 3 by portions 24 of the leading-in wires which are bent into sideward extending Us.
- the end section 20 of lead- 45 ing-in wire I3 is also engaged by a support wire 25 which extends from arbor 22 and holds said section so securely that after the blowing of fuse IE it is supported thereby.
- a non-conducting shield comprising a glass tube 26 is preferably 50 located about leading-in wire I3 between the heat shield 23 and support wire 25. The tube 26 serves to quench the are which forms when the fuse is blown and prevents the said are from being transferred to the other leading-in wire. 55
- the lamp shown in Fig. 4 differs from that Just described in that it has two filaments II and II,
- each of the filaments l8. I8 is connected to lead wire i3, while the opposite ends of said filaments are connected respectively to lead wires l2 and II.
- the fuse I0 is incorporated in the common lead wire It.
- An electric device comprising a bulb, an electric energy translation element in said bulb, a leading-in wire extending into said bulb, the inner end of said leading-in wire being connected to said energy translation element, a fuse disposed between sections of said leading-in wire in said bulb, and a non-conductive shield surrounding said fuse.
- An electric device comprising 'a bulb, a electric energy translation element in said bulb, a leading-in'wire extending into said bulb, the
- leading-in wire being connected to said energy translation element, a fuse disposed between sections of said leading-in wire in said bulb, a non-conductive shield surrounding said fuse, and means for-independently supporting the section of leading-in wire between said fuse and energy translation element.
- An electric device comprising a bulb, an electric energy translation element in said bulb, a leading-in wire extending into said bulb, the inner end of said leading-in wire being conaoamse nected to said energy translation element, a fuse disposed between sections "of said leading-in wire in said bulb, a non-conductive shield surrounding said fuse, and means for independently supporting the section of leading-in wire'between I said fuse and energy translation element, said means also supporting said shield.
- An electric device comprising a bulb, a plurality .of electric energy translation elements in said bulb, a leading-in wire extending into said 10 bulb, the inner end of said leading-in wire being connected to said energy translation elements, a fuse disposed between sections of said leadingin wire in said bulb, and a non-conductive shield surrounding said fuse.
- An electric device comprising a bulb, an electric energy translation element in said bulb, a leading-in wire extending into said bulb from one end thereof, the inner end of said leading-in wire being connected'to said energy translation element, a fuse disposed between sections of said leading-in wire in said bulb, an insulating arbor extending axially into said bulb, a support wire extending from said arbor to the, section of leading-in wire between said fuse and energy translation element, a non-conductive apertured disc surrounding said arbor and attached to the section of leading-in wire between said fuse and the end of the bulb, and a non-conductive tubular shield surrounding said fuse and extending between said support wire and disc.
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Fuses (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US701452A US2021758A (en) | 1933-12-08 | 1933-12-08 | Electric lamp |
FR782391D FR782391A (fr) | 1933-12-08 | 1934-12-07 | Lampe électrique |
GB35215/34A GB429886A (en) | 1933-12-08 | 1934-12-07 | Improvements in and relating to electric lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US701452A US2021758A (en) | 1933-12-08 | 1933-12-08 | Electric lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
US2021758A true US2021758A (en) | 1935-11-19 |
Family
ID=24817437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US701452A Expired - Lifetime US2021758A (en) | 1933-12-08 | 1933-12-08 | Electric lamp |
Country Status (3)
Country | Link |
---|---|
US (1) | US2021758A (fr) |
FR (1) | FR782391A (fr) |
GB (1) | GB429886A (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2494917A (en) * | 1942-10-06 | 1950-01-17 | Gen Electric | Fuse lead for electric lamps |
US3345526A (en) * | 1963-04-04 | 1967-10-03 | Ass Elect Ind | Electric incandescent lamps |
US3727091A (en) * | 1971-05-11 | 1973-04-10 | Westinghouse Electric Corp | Halogen-cycle incandescent lamp having a platinized interior fuse |
EP1398821A2 (fr) * | 2002-09-13 | 2004-03-17 | Light Sources, Inc. | Lampe germicide avec dispositif d'extinction d'arc en fin de vie |
-
1933
- 1933-12-08 US US701452A patent/US2021758A/en not_active Expired - Lifetime
-
1934
- 1934-12-07 FR FR782391D patent/FR782391A/fr not_active Expired
- 1934-12-07 GB GB35215/34A patent/GB429886A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2494917A (en) * | 1942-10-06 | 1950-01-17 | Gen Electric | Fuse lead for electric lamps |
US3345526A (en) * | 1963-04-04 | 1967-10-03 | Ass Elect Ind | Electric incandescent lamps |
US3727091A (en) * | 1971-05-11 | 1973-04-10 | Westinghouse Electric Corp | Halogen-cycle incandescent lamp having a platinized interior fuse |
EP1398821A2 (fr) * | 2002-09-13 | 2004-03-17 | Light Sources, Inc. | Lampe germicide avec dispositif d'extinction d'arc en fin de vie |
EP1398821A3 (fr) * | 2002-09-13 | 2006-03-01 | Light Sources, Inc. | Lampe germicide avec dispositif d'extinction d'arc en fin de vie |
Also Published As
Publication number | Publication date |
---|---|
GB429886A (en) | 1935-06-07 |
FR782391A (fr) | 1935-06-04 |
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