US507558A - Incandescent electric lamp - Google Patents

Incandescent electric lamp Download PDF

Info

Publication number
US507558A
US507558A US507558DA US507558A US 507558 A US507558 A US 507558A US 507558D A US507558D A US 507558DA US 507558 A US507558 A US 507558A
Authority
US
United States
Prior art keywords
cement
lamp
incandescent electric
electric lamp
plug
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
Application number
Publication date
Application granted granted Critical
Publication of US507558A publication Critical patent/US507558A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28Non-electron-emitting electrodes; Screens
    • H01J19/32Anodes
    • H01J19/36Cooling of anodes

Definitions

  • My invention relates to incandescent electric lamps of that class in which the neck of the lamp bulb is closed air-tight by a plug of fusible cement, and has especially to do with the composition of the cement of which the plug is made.
  • A is the glass bulb of the lamp
  • C is the plug of fusible cement, which is poured into the lamp neck in the melted state, and which is supported while soft by the disk D, of mica or other suitable material.
  • the disk D rests upon the shoulder a, formed in the neck of the lamp bulb.
  • F is the filament, attached at f and f to the leading-in wires W and W.
  • D is a heat-reflecting disk, located in the lamp neck, between the cement plug and the filament, for the purpose of protecting the former from the radiant heat of the latter, and rests upon the shoulder a, formed in the neck of the lamp bulb, from which it is prevented from rising by the coils w and w, in the leading-in wires W and W.
  • the wires W and W are attached at S and S to the proper parts of an ordinary base or cap B, which surmounts the lamp neck and to which it is secured by plaster in the usual manner.
  • the cement plug C of some resinous substance like ordinary rosin, copal, 850., whose flexibility and adhesiveness have been increased by the addition of a quantity of a suitable oil, as linseed for example.
  • a suitable oil as linseed for example.
  • oils which are liquid at ordinary temperatures
  • a fatty body which is solid at ordinary temperatures for example, below or there is no perceptible softening of the cement until a heat somewhat above the melting point of the fatty body itself is reached.
  • the temperature of the cement plug of a lamp of the class described, if properly constructed, is not above while in operation, the cement thus composed remains entirely unaflected, while one containing an oil, in sufficient quantity to obtain the desired flexibility, softens considerably.
  • stearic acid is well adapted for the purpose. Its melting point is about Fahrenheit, which is considerably above the normal temperature of the cement plug of an operating lamp of the class described. Stearin, paraffine, and other fatty bodies which are solid at ordinary temperatures may be used, but I prefer stearic acid. These solid fats impart to the resinous base, flexibility and adhesiveness in an equal, if not superior degree, as the oils, while they do not tend to lower the melting point of the cement to nearly so great an extent whereby much advantage is gained from their use, since it is very desirable to keep the melting point of the cement as high as is consistent with the necessary flexibility and adhesiveness.
  • the gist of my invention consists, in ren- 5 dering the resinous cement by which the neck of an incandescent lamp is closed air-tight, flexible and adhesive by the addition of a I solid fat or fatty acid, whereby the greatest flexibility and adhesiveness combined with the highest melting point is secured.
  • I claim-- 1 In an incandescent electric lamp, the neck of which is adapted to be olosedair-tight by a plug of fusible cement, a cement plug composed of a resinous body made flexible and adhesive by fat solid at ordinary temperatures, substantially as and for the purpose set forth.

Landscapes

  • Resistance Heating (AREA)

Description

(No Model.)
- I B. NIGKERSON.
INCANDESGEHIT ELECTRIC LAMP;
No. 507,558. Patented 055. 31, I893.
UNrrn WILLIAM EMERY NICKERSON, OF CAMBRIDGE, MASSACHUSETTS.
INCANDESCENT ELECTRIC LAMP.
SPECIFICATION forming part of Letters Patent No. 507,558, dated October 31, 1893.
Application filed August 5, 1893. Serial No. 482,469- (No model.)
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 Massachusetts, 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 electric lamps of that class in which the neck of the lamp bulb is closed air-tight by a plug of fusible cement, and has especially to do with the composition of the cement of which the plug is made.
My invention is illustrated in the accompanying drawing, which represents, partly in vertical section and partly in side elevation, an incandescent electric lamp of the class referred to.
In the drawing, A is the glass bulb of the lamp, and C is the plug of fusible cement, which is poured into the lamp neck in the melted state, and which is supported while soft by the disk D, of mica or other suitable material. The disk D rests upon the shoulder a, formed in the neck of the lamp bulb.
F is the filament, attached at f and f to the leading-in wires W and W.
D is a heat-reflecting disk, located in the lamp neck, between the cement plug and the filament, for the purpose of protecting the former from the radiant heat of the latter, and rests upon the shoulder a, formed in the neck of the lamp bulb, from which it is prevented from rising by the coils w and w, in the leading-in wires W and W. The wires W and W are attached at S and S to the proper parts of an ordinary base or cap B, which surmounts the lamp neck and to which it is secured by plaster in the usual manner.
It has been customary heretofore, to make the cement plug C of some resinous substance like ordinary rosin, copal, 850., whose flexibility and adhesiveness have been increased by the addition of a quantity of a suitable oil, as linseed for example. I prefer to use as the basis of my cement a compound consisting of pine rosin chemically combined with oxide of lime, which has been subjected to the action of a vacuum at a temperature considerably above its melting point, mixed with a quantity of sand, in such proportion that it a little more than fills the spaces between the sand particles, as set forth in my patents No. 501,530, dated July 18,1893; No. 501,531, dated July 18, 1893, and No. 500,075, dated June 20, 1893.
When oils (which are liquid at ordinary temperatures), are used for imparting flexibility and adhesiveness to the cement; there is a gradual softening of the cement as the heat increases from ordinary temperatures upward, so that considerably below the actual melting point of the cement, it becomes too soft to obtain the best results. When, however, a fatty body which is solid at ordinary temperatures, for example, below or there is no perceptible softening of the cement until a heat somewhat above the melting point of the fatty body itself is reached. As the temperature of the cement plug of a lamp of the class described, if properly constructed, is not above while in operation, the cement thus composed remains entirely unaflected, while one containing an oil, in sufficient quantity to obtain the desired flexibility, softens considerably. I have found by experiments, that stearic acid is well adapted for the purpose. Its melting point is about Fahrenheit, which is considerably above the normal temperature of the cement plug of an operating lamp of the class described. Stearin, paraffine, and other fatty bodies which are solid at ordinary temperatures may be used, but I prefer stearic acid. These solid fats impart to the resinous base, flexibility and adhesiveness in an equal, if not superior degree, as the oils, while they do not tend to lower the melting point of the cement to nearly so great an extent whereby much advantage is gained from their use, since it is very desirable to keep the melting point of the cement as high as is consistent with the necessary flexibility and adhesiveness.
The gist of my invention consists, in ren- 5 dering the resinous cement by which the neck of an incandescent lamp is closed air-tight, flexible and adhesive by the addition of a I solid fat or fatty acid, whereby the greatest flexibility and adhesiveness combined with the highest melting point is secured.
I claim-- 1. In an incandescent electric lamp, the neck of which is adapted to be olosedair-tight by a plug of fusible cement, a cement plug composed of a resinous body made flexible and adhesive by fat solid at ordinary temperatures, substantially as and for the purpose set forth.
2. In an incandescent electric lamp, the combination of the glassbulb A having a neck adapted to be closed air-tight by a plug of fusible cement, the filament F, and the lead ing-in wires Wand W; with the cement plug a
US507558D Incandescent electric lamp Expired - Lifetime US507558A (en)

Publications (1)

Publication Number Publication Date
US507558A true US507558A (en) 1893-10-31

Family

ID=2576391

Family Applications (1)

Application Number Title Priority Date Filing Date
US507558D Expired - Lifetime US507558A (en) Incandescent electric lamp

Country Status (1)

Country Link
US (1) US507558A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997809A (en) * 1975-05-16 1976-12-14 Kyp Robert J Decorative lamp having an integral base and envelope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997809A (en) * 1975-05-16 1976-12-14 Kyp Robert J Decorative lamp having an integral base and envelope

Similar Documents

Publication Publication Date Title
US507558A (en) Incandescent electric lamp
US503671A (en) Incandescent electric lamp
US2883352A (en) High temperature resistant molding composition containing phenol formaldehyde condensation product
US503108A (en) Incandescent electric lamp
US501530A (en) Incandescent electric lamp
US500079A (en) Incandescent electric lamp
US503670A (en) Incandescent electric lamp
US305817A (en) Seph p
US1699438A (en) Soldering stick
US1206827A (en) Match-ignition material.
US966927A (en) Filament for incandescent-gas-lamp mantles.
US500670A (en) Incandescent electric lamp
US501531A (en) Incandescent electric lamp
US2407621A (en) Electric lamp base or cap and bonding cement therefor
US467523A (en) Edward p
US998687A (en) Arc-lamp electrode.
US523305A (en) X j john e
US788493A (en) Incandescent electric lamp.
US759506A (en) Means for and method of securing lead-in wires in electric lamps.
US500078A (en) Incandescent electric lamp
US535838A (en) Incandescent electric lamp
US500076A (en) Incandescent electric lamp
US500075A (en) Incandescent electric lamp
US1259806A (en) Plastic compositon.
US29898A (en) Improvement in manufacture of flexible gas-tubes