US297581A - edison - Google Patents
edison Download PDFInfo
- Publication number
- US297581A US297581A US297581DA US297581A US 297581 A US297581 A US 297581A US 297581D A US297581D A US 297581DA US 297581 A US297581 A US 297581A
- Authority
- US
- United States
- Prior art keywords
- globe
- tube
- edison
- air
- 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
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 14
- 239000007789 gas Substances 0.000 description 14
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- DLYUQMMRRRQYAE-UHFFFAOYSA-N Phosphorus pentoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 235000011118 potassium hydroxide Nutrition 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- ORXDSIPBTFAEKJ-UHFFFAOYSA-N ferrocyanide Chemical compound N#C[Fe-4](C#N)(C#N)(C#N)(C#N)C#N ORXDSIPBTFAEKJ-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
Definitions
- A represents the inclosing-globe, and a the carbon filament of an incandescing electric lamp.
- Such globe is attached by tube b to the Sprengel vacuum-pump, of which 0 is the supply-tube and d-the fall-tube.
- the B is a glass vessel, closed by an air-tight rubber stopper, c, in which are inserted tubes 0 and D.
- the tube 0 opens in the air, terminating in a rubber tube, f, provided with a pinch-cock, g, so that the opening may be closed.
- the tube D connects the vessel B with the Sprengel pump.
- This tube contains phosphoric anhydride h h, or similar drying agent, and caustic potash i. It is provided with stopcocksj and k, and with a bulb, 1, containing cotton for preventing the substances in the tube from being drawn out when the pump is working.
- the vessel B contains sulphuric acid and ferro-cyanide of potassium, and means 5 (represented at E) are provided for heating the same.
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
(No Model.)
T. A. EDISON.
. INC'ANDESOENT ELECTRIC LAMP. No. 297,581. Patented Apr. 29,1884.
gngsm M670. QJ/IINVENTIOR:
N. PEIERS. m u-um n a". Washington, n. z;
UNITED g STATE PATENT OFFICE.
THOMAS A. EDISON, OF MENLO PARK, NEw JERSEY, ASSIGN E r0 THE EDISON ELECTRIC LIGHT O PANY, OE NEW YORK, N. Y.
INCANDESCENT ELECTRIC LAMP.
SPECIFICATION forming part of Letters Patent No. 297,581, dated April 29, 1884-.
Application filed September 22, 1882. (No model.) I
consistsin providingsuch globes with aresidual atmosphere of carbonic monoxide as nearly as possible free from air. To accomplish this, I first remove the air from the globe as completely as it can be done with a Sprengel vacuum-pump, and then fill the globe with carbonic monoxide in a pure state and free from moisture.
This is in turn pumped out, and the globe is refilled with the gas, this be-- ing repeated until the small amount of residual gas remaining in the globe consists almost entirely of carbonic monoxide, and this of course to the exclusion of the same amount of air.
A convenient apparatus for carrying out my invention is represented in the accompanying drawing.
A represents the inclosing-globe, and a the carbon filament of an incandescing electric lamp. Such globe is attached by tube b to the Sprengel vacuum-pump, of which 0 is the supply-tube and d-the fall-tube.
B is a glass vessel, closed by an air-tight rubber stopper, c, in which are inserted tubes 0 and D. The tube 0 opens in the air, terminating in a rubber tube, f, provided with a pinch-cock, g, so that the opening may be closed. The tube D connects the vessel B with the Sprengel pump. This tube contains phosphoric anhydride h h, or similar drying agent, and caustic potash i. It is provided with stopcocksj and k, and with a bulb, 1, containing cotton for preventing the substances in the tube from being drawn out when the pump is working. The vessel B contains sulphuric acid and ferro-cyanide of potassium, and means 5 (represented at E) are provided for heating the same. Such heating produces carbon monoxide. The stop-cocks j and k are left closed, and the cock 9 open until the vessel B becomes full of this gas, which displaces the air previ- 5o ously contained therein. The gas is then allowed to enter the lamp, from which the air has been exhausted, its moisture being removed by the phosphoric anhydride, and any carbonic acid which may have been given off is taken up by the caustic potash. After the globe is filled with the carbon monoxide the gas is pumped out and a second quantity allowed to enter. This is removed, and these operations are continued until only the smallest possible amount of carbonic monoxide, remains in'the globe. During the latter stages of the operation the carbonfilament of the lamp is heated to high incandescence by an electric current in order that the occluded gases may be driven off. The lamp is sealed off at b, and is then ready for use.
I am aware that British Patent No. 192 of 1879 describes the passing of a stream of carbon gas constantly through openings in a lamp-globe. This, however, forms no part of my invention,which relates only to lamps having sealed globes.
What I claim is The sealed globe of an incandescing electric lamp, provided with a residual atmosphere consisting almost entirely of carbonic monoxide, substantially as set forth.
This specification signed and witnessed this 12th day of September, 1882.
' THOS. A. EDISON.
Witnesses:
WM. A. STERN, H. W. SEELY.
Publications (1)
Publication Number | Publication Date |
---|---|
US297581A true US297581A (en) | 1884-04-29 |
Family
ID=2366764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US297581D Expired - Lifetime US297581A (en) | edison |
Country Status (1)
Country | Link |
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US (1) | US297581A (en) |
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0
- US US297581D patent/US297581A/en not_active Expired - Lifetime
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