US507556A - Incandescent electric lamp - Google Patents
Incandescent electric lamp Download PDFInfo
- Publication number
- US507556A US507556A US507556DA US507556A US 507556 A US507556 A US 507556A US 507556D A US507556D A US 507556DA US 507556 A US507556 A US 507556A
- Authority
- US
- United States
- Prior art keywords
- electric lamp
- incandescent electric
- disk
- plug
- 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
- 239000004568 cement Substances 0.000 description 18
- 239000010445 mica Substances 0.000 description 16
- 229910052618 mica group Inorganic materials 0.000 description 16
- 241001325354 Lamiinae Species 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 238000009877 rendering Methods 0.000 description 4
- 230000036633 rest Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 101710028361 MARVELD2 Proteins 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 2
- 230000001066 destructive Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001651 emery Inorganic materials 0.000 description 2
- 239000011507 gypsum plaster Substances 0.000 description 2
- 230000000630 rising Effects 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/32—Anodes
- H01J19/36—Cooling of anodes
Definitions
- My invention relates to incandescent elec tric lamps of that class in which disks of mica are used, either for supporting a plug of fusible cement by which the neck of the lamp bulb is sealed air-tight, or for the purpose of intercepting and reflecting back, or away, from the said plug, the radiant heat of the filament, which would otherwise tend to soften it.
- A represents the glass bulb of an incandescent electric lamp of the class described
- F the filament
- W W the leading-in wires to which the filament is attached at f f.
- P is a plug of fusible cement which is poured into the lamp neck in a melted state and is supported while soft by the disk E which rests upon the shoulder a formed in the neck of the lamp bulb.
- B is a base or cap of an ordinary type, secured to the lamp neck by plaster of paris in the usual manner, and to the proper parts of which the leading-in wires W W are attached at S S.
- D is a heat-reflecting disk made of mica and rests upon the shoulder a, from which it is prevented from rising by the coils O 0 formed in the leading-in wires W W directly above it.
- My invention relates to a method of rendering the disk D, and also if desired the disk E, more effective in intercepting and throwing back the radiant heat of the incandescent filament.
- This I accomplish by subjecting these mica disks, to a high temperature, such as may be obtained by holding them in the flame of an ordinary Bunsen gas lamp. The result of this treatment is to cause the thin laminae of which the mica is composed, to
- I claim- 1 In an incandescent electric lamp, having a bulb the neck of which is adapted to be closed air-tight by a plug of fusible cement, mica disks located between the cement plug and the filament, said disks having been subjected to a high degree of heat, for the purpose of increasing their capacity to intercept heat rays, substantially as and for the purpose set forth.
Description
(No Model.)
W. E. NICKERSON.
INQANDESGENT ELECTRIC LAMP. N0. 507,556. Patented Oct. 31, 18931 WITHEESYESI- I l l\|- @2 36? art/WM UNITED STATES PATENT OFFI E.
WILLIAM EMERY NIOKERSON, OF CAMBRIDGE, MASSACHUSETTS.
INCANDESCENT ELECTRIC LAMP.
SPECIFICATION forming part of Letters Patent No. 507,556, dated October 31, 1893.
Application filed July 31,1893.
To all whom it may concern.-
Be it known that I, WILLIAM EMERY NICK- ERSON, of Cambridge, in the county of Middlesex and State of Massach usetts, have invented a new and useful Improvement in Incandescent Electric Lamps, of which the following, taken in connection with the accompanying drawing, is a specification.
My invention relates to incandescent elec tric lamps of that class in which disks of mica are used, either for supporting a plug of fusible cement by which the neck of the lamp bulb is sealed air-tight, or for the purpose of intercepting and reflecting back, or away, from the said plug, the radiant heat of the filament, which would otherwise tend to soften it.
It consists in a method of rendering such disks of mica more effective in intercepting such radiant heat.
My invention is illustrated in the accompanying drawing, in which A represents the glass bulb of an incandescent electric lamp of the class described, F the filament, W W the leading-in wires to which the filament is attached at f f.
P is a plug of fusible cement which is poured into the lamp neck in a melted state and is supported while soft by the disk E which rests upon the shoulder a formed in the neck of the lamp bulb.
B is a base or cap of an ordinary type, secured to the lamp neck by plaster of paris in the usual manner, and to the proper parts of which the leading-in wires W W are attached at S S.
D is a heat-reflecting disk made of mica and rests upon the shoulder a, from which it is prevented from rising by the coils O 0 formed in the leading-in wires W W directly above it.
My invention relates to a method of rendering the disk D, and also if desired the disk E, more effective in intercepting and throwing back the radiant heat of the incandescent filament. This I accomplish by subjecting these mica disks, to a high temperature, such as may be obtained by holding them in the flame of an ordinary Bunsen gas lamp. The result of this treatment is to cause the thin laminae of which the mica is composed, to
Serial No. 482,003. (No model.)
separate from each other to such an extent, that the thickness of the disk is much increased, and an extremely large number of narrowly separated surfaces presented, for the backward reflection of the heat rays. So great is the number of these surfaces that the disk becomes opaque, or at least merely translucent, and totally non-diathermatic. Its capacity for transmitting heat by conduction is also reduced to a minimum, and it becomes extremely efficient, in protecting the cement plug P, from the destructive efiects of the radiant heat of the incandescent filament.
I claim- 1. In an incandescent electric lamp, having a bulb the neck of which is adapted to be closed air-tight by a plug of fusible cement, mica disks located between the cement plug and the filament, said disks having been subjected to a high degree of heat, for the purpose of increasing their capacity to intercept heat rays, substantially as and for the purpose set forth.
2. In an incandescent electric. lamp, the combination of the glass bulb A having a neck adapted to be closed air-tight by a plug of fusible cement, the cement plug P, the
leading-in wires W W, and the filament F; with the disk of mica D, said disk being rendered opaque by the separation of its laminae through the effect of heat, substantially as and for the purpose set forth.
3. In an incandescent electric lamp, the combination of the glass bulb A having a neck adapted to be closed air-tight by a plug of fusible cement, the cement plug P, the leading-in wires W W, and the filament F; with the disk of mica E, said disk being reudered opaque by the separation of its laminae through the efiect of heat, substantially as and for the purpose set forth.
In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 28th day of July, A. D. 1893. 7
WILLIAM EMERY .NICKERSON.
Witnesses:
FRANK G. PARKER, FRANK G. HATTIE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US507556A true US507556A (en) | 1893-10-31 |
Family
ID=2576389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US507556D Expired - Lifetime US507556A (en) | Incandescent electric lamp |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US507556A (en) |
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0
- US US507556D patent/US507556A/en not_active Expired - Lifetime
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