US398774A - Incandescent electric lamp - Google Patents
Incandescent electric lamp Download PDFInfo
- Publication number
- US398774A US398774A US398774DA US398774A US 398774 A US398774 A US 398774A US 398774D A US398774D A US 398774DA US 398774 A US398774 A US 398774A
- Authority
- US
- United States
- Prior art keywords
- glass
- electric lamp
- terminals
- lamp
- filament
- 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
- 239000011521 glass Substances 0.000 description 32
- 230000015572 biosynthetic process Effects 0.000 description 14
- 238000005755 formation reaction Methods 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 239000004020 conductor Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 239000010445 mica Substances 0.000 description 6
- 229910052618 mica group Inorganic materials 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 4
- 229920000136 polysorbate Polymers 0.000 description 4
- 230000000630 rising Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/003—Arrangements for eliminating unwanted electromagnetic effects, e.g. demagnetisation arrangements, shielding coils
Definitions
- a short glass tube, F is placed over one end of the filament. This would be placed over the filament before the latter is attached to the lcading-in wires.
- Fig. 4 the disk of insulating material G is placed over the middle of the straight filament, being thus interposed between the terminals thereof.
- the object of this invention is to prevent the formation of an are between the terminals of the conductor within the globe of an incandescing electric lamp. I accomplish this by interposing between the terminals of the conductor an insulating body, preferably of a transparent material, like mica or glass. This of course increases the resistance of the space between the terminals and so prevents the formation of an arc across such space.
- I preferably place a thin plate of glass or mica between the ends of the loop, rising to a su'fiicient height and supported by a metallic or other arm rising from the middle of the inner stem or wire support of the lamp benals, substantially as set forth. tween the leading-in wires; or the edge of the 2.
- the plate may be inserted in the stem, the glass combination, with the arched or looped conbeing softened and split to admit it; or I ductor, of an insulating-plate interposed bemay have one end of the filament inclosed tween the terminals of said conductor and by a glass tube resting upon the glass below.
- a straight carbon is employed, a between said terminals, substantially as set glass or mica disk having an aperture in its forth. center maybe placed around the middle of 23.
- the carbon so that insulatirnl is interposed combination, with the arched or looped conbet ween its terminals. ductor and the glass stem or wire support, of
- terminals of said conductor and supported l igure 1 is a view of an incandescing elec from said wire support and adapted to pretric lamp embodying the preferred form of vent the formation of an arc between said my invention
- Fig. 2 a view of a portion of terminals, substantially as set forth. the lamp with the glass tube inclosing the 4.
- Fig. 3 a view showing the insulating-plate ductor and the glass stem or wire support, of inserted in the glass of the stem, and Fig.
- Rclerring to l ig. l, l) is a plate oi glass or mica interposed between the sides of the filament U and supported by an arm, E, rising from the glass of the stem B.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
(No Model.)
T. A. EDISON.
INGANDESGENT ELECTRIC LAMP. No. 398,774. Patented Feb. 26, 1889 0 3. F/lyl 1 11313.
CED
F Ja J2.
T TE 5 T: rfi INVENT DR:
UNITED STATES PATENT OFFICE.
THOMAS A. EDISON, OE MENLO PARK, NElV JERSEY.
INCANDESCENT ELECTRIC LAMP.
SIECIFICATION forming part of Letters Patent No. 398,774, dated February 26, 1889.
Application filed May 14, 1883. Serial No. 94,891. (No model.)
In Fig. 3 the plate I) is inserted into the glass of the stem B, as before explained.
In Fig. 2 a short glass tube, F, is placed over one end of the filament. This would be placed over the filament before the latter is attached to the lcading-in wires.
In Fig. 4 the disk of insulating material G is placed over the middle of the straight filament, being thus interposed between the terminals thereof.
In my Patent No. 242,896 is shown a glass arm of small diameter extending up between the sides of the carbon loop to support the same. It is evident that this would not accomplish the object of the present invention, as the small glass arm would admit of the formation of the are around said arm.
lia-t I claim is 1. In an incandescing electric lamp, the combination ,with the incandescin g conductor, of solid insulating material interposed between its terminals and adapted to prevent the formation of an are between said termi- To aZZ whom it may concern.-
Be it known that I, THOMAS A. EDISON, of Menlo Park, in the county of Middlescx and State of New Jersey, have invented a new and useful Improvement in Incandescent Electric Lamps, (Case No. 562,) of which the following is a specification.
The object of this invention is to prevent the formation of an are between the terminals of the conductor within the globe of an incandescing electric lamp. I accomplish this by interposing between the terminals of the conductor an insulating body, preferably of a transparent material, like mica or glass. This of course increases the resistance of the space between the terminals and so prevents the formation of an arc across such space.
In applying the invention to a lamp in which an arched or looped carbon filament is used I preferably place a thin plate of glass or mica between the ends of the loop, rising to a su'fiicient height and supported by a metallic or other arm rising from the middle of the inner stem or wire support of the lamp benals, substantially as set forth. tween the leading-in wires; or the edge of the 2. In an incandescing electric lamp, the plate may be inserted in the stem, the glass combination, with the arched or looped conbeing softened and split to admit it; or I ductor, of an insulating-plate interposed bemay have one end of the filament inclosed tween the terminals of said conductor and by a glass tube resting upon the glass below. adapted to prevent the formation of an arc \Vhen a straight carbon is employed, a between said terminals, substantially as set glass or mica disk having an aperture in its forth. center maybe placed around the middle of 23. In an incandescing electric lamp, the the carbon, so that insulatirnl is interposed combination, with the arched or looped conbet ween its terminals. ductor and the glass stem or wire support, of
The invention is illustrated in the accoman insulating-plate interposed between the pany drawings, in which" terminals of said conductor and supported l igure 1 is a view of an incandescing elec from said wire support and adapted to pretric lamp embodying the preferred form of vent the formation of an arc between said my invention; Fig. 2, a view of a portion of terminals, substantially as set forth. the lamp with the glass tube inclosing the 4. In an incandescing electric lamp, the lower portion of one side of the filament; combination, with the arched or looped con- Fig. 3, a view showing the insulating-plate ductor and the glass stem or wire support, of inserted in the glass of the stem, and Fig. 4 an insulating-plate having its edge inserted a view showing the invcntiim applied to a in the glass of said support and extending up st raight carbon lamp. 3 between the terminals of said conductor and .i represents theinclosing-globeof the lamp, l adapted to prevent the formation of an arc and ll isthe inner stem sealed therein. The between the terminals, substantially as set leading-in wires 1. 2 are sealed in the glass forth. and support the tlmible carbon filament C, This specification signed and witnessed this which is securcsl to said wires by electroplat- 8th day of May, 1883.
'L F' I Tnos. A. EDISON.
Rclerring to l ig. l, l) is a plate oi glass or mica interposed between the sides of the filament U and supported by an arm, E, rising from the glass of the stem B.
\Vitnesscs:
WM. H. MEAnowcRoE'r, H. W. SEEL'Y.
Publications (1)
Publication Number | Publication Date |
---|---|
US398774A true US398774A (en) | 1889-02-26 |
Family
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Family Applications (1)
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US398774D Expired - Lifetime US398774A (en) | Incandescent electric lamp |
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- US US398774D patent/US398774A/en not_active Expired - Lifetime
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