US454558A - Thomas a - Google Patents
Thomas a Download PDFInfo
- Publication number
- US454558A US454558A US454558DA US454558A US 454558 A US454558 A US 454558A US 454558D A US454558D A US 454558DA US 454558 A US454558 A US 454558A
- Authority
- US
- United States
- Prior art keywords
- carbon
- lamp
- limbs
- wires
- thomas
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 22
- 229910052799 carbon Inorganic materials 0.000 description 22
- 210000003414 Extremities Anatomy 0.000 description 16
- 238000009713 electroplating Methods 0.000 description 8
- 239000011521 glass Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
Definitions
- the object of my invention is to produce an incandescent electric lamp in which one double-limbed carbon is used made integral throughout its length, such carbon being so arranged and connected that both limbs may be used together in series in the ordinary manner, or both maybe used in multiple arc, or either limb may be used separately without the other.
- the limbs of the carbon (which is the ordinary horseshoe carbon commonly employed by me) are supported in the usual manner by electroplating to leading-in wires sealed in the glass of the inclosing globe. Between these leading-in wires is sealed a third, which extends up between the limbs of the carbon, and is attached at the center of the arch or loop by electroplating thereto. hen all these wires are properly connected to the system, the current passes through the central wire and is divided between the two limbs of the carbon, the latter thus being in multiple arc. If the central wire is disconnected and the two limbs attached to opposite wires of the system, the two are of course in series,or it one limb of the carbon is disconnected the other may be used separately. This may be better understood by reference to the accompanying drawing, in which the figure represents the carbon and connections, the globe of the lamp being omitted.
- A is the interior supporting tube or stem of an incandescent lamp.
- 1 2 are the leadingin wires sealed therein and supporting the limbs C C of the carbon, to which they are secured by electroplating.
- a third leadingin wire 3 is also sealed in the glass stem A, and is attached above at the center of the arch by electroplating the wire to the carbon at b.
- Suitable arrangements of contacts and cir cuit-controllers are made in the base of the lamp or elsewhere, so that the proper connections for the various uses of the lamp may be made, as described.
Landscapes
- Electroplating Methods And Accessories (AREA)
Description
(No Model.)
T. A. EDISON. INGANDESGENT ELEUTRIG LAMP.
No. 454,558. Patented June 23,1891.
WITNESSES INVIINTOR ATTORN UNITED STATES PATENT OFFICE.
THOMAS A. EDISON, OF MENLO PARK, NEIV JERSEY, ASSIGNOR TO THE EDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y.
INCANDESCENT ELECTRIC LAMP.
SPECIFICATION forming part of Letters Patent No. 454,558, dated June 23, 1891.
Application filed August 7, 1882- Serial No. 68,606. (No model.)
To aZZ whom it may concern:
Be it known that I, THOMAS A. EDISON, of Menlo Park, in the county of Middlesex and State of New Jersey, have invented new and useful Improvements in Incandescing Electric Lamps and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.
The object of my invention is to produce an incandescent electric lamp in which one double-limbed carbon is used made integral throughout its length, such carbon being so arranged and connected that both limbs may be used together in series in the ordinary manner, or both maybe used in multiple arc, or either limb may be used separately without the other.
In carrying my invention into effect the limbs of the carbon (which is the ordinary horseshoe carbon commonly employed by me) are supported in the usual manner by electroplating to leading-in wires sealed in the glass of the inclosing globe. Between these leading-in wires is sealed a third, which extends up between the limbs of the carbon, and is attached at the center of the arch or loop by electroplating thereto. hen all these wires are properly connected to the system, the current passes through the central wire and is divided between the two limbs of the carbon, the latter thus being in multiple arc. If the central wire is disconnected and the two limbs attached to opposite wires of the system, the two are of course in series,or it one limb of the carbon is disconnected the other may be used separately. This may be better understood by reference to the accompanying drawing, in which the figure represents the carbon and connections, the globe of the lamp being omitted.
A is the interior supporting tube or stem of an incandescent lamp. 1 2 are the leadingin wires sealed therein and supporting the limbs C C of the carbon, to which they are secured by electroplating. A third leadingin wire 3 is also sealed in the glass stem A, and is attached above at the center of the arch by electroplating the wire to the carbon at b.
Suitable arrangements of contacts and cir cuit-controllers are made in the base of the lamp or elsewhere, so that the proper connections for the various uses of the lamp may be made, as described.
What I claim is- In an incandescent electric lamp, the combination of an inclosing globe, a continuous integral loop'shaped carbon filament therein, conducting-wires attached to the ends of said filament and extending outside the globe for electrical connection with an external circuit, and a third conducting-wire connected with the middle point of the filamentary loop and also extending outside the globe for electrical connection, substantially as set forth.
This specification signed and witnessed this 5th day of December, 1881.
T. A. EDISON.
Witnesses:
H. W. SEELY, WM. II. MEADowoRoFT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US454558A true US454558A (en) | 1891-06-23 |
Family
ID=2523436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US454558D Expired - Lifetime US454558A (en) | Thomas a |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US454558A (en) |
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0
- US US454558D patent/US454558A/en not_active Expired - Lifetime
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