US1547747A - Incandescent electric lamp - Google Patents
Incandescent electric lamp Download PDFInfo
- Publication number
- US1547747A US1547747A US439372A US43937221A US1547747A US 1547747 A US1547747 A US 1547747A US 439372 A US439372 A US 439372A US 43937221 A US43937221 A US 43937221A US 1547747 A US1547747 A US 1547747A
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- US
- United States
- Prior art keywords
- electric lamp
- incandescent electric
- light
- lamp
- incandescent
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- 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.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
- H01K3/005—Methods for coating the surface of the envelope
Definitions
- My invention relates to improvements in incandescent lamps, particularly of the miniature type.
- Miniature lamps heretofore manufactured for use in the dental and medical professions have not met requirements chiefly because they have given scattered llght of non-uniform intensity. It is an object of this invention to meet such requirements by providin a lamp which will pro3ect a sharply efined circular spot of light of unlform intensity.
- My lamp includes the usual base 2 having a bulb 3 cemented thereto in the usual manner.
- the bulb as illustrated, is substantially of frusto-conical shape, and the larger end thereof is provided with a lens 4, formed as an integral part of the bulb.
- the bulb 3 is composed of two layers of glass, as is usual in lamps of this class, being formed by fusing a tube of so-called opal glass within and to a tube of clear glass.
- My lamp therefore, differs from previous lamps partly in having side walls so formed and disposed as to provide a reflecting surface having such relation to the luminous source that the reflecte? ra s will be directed through the lens I an thereby generally improving the optical system.
- the smaller end of the bulb is secured to the screw plug or base 2.
- a filament 7 is mounted upon supports 8
- An incandescent electric lamp adapted for the projection of a concentrated beam of light comprising a frusto-conical' body having an inner light reflecting layer and an outer transparent layer fused thereto, a concentrated light source disposed within said body, a base at the lower end of the body, a cover for the upper end of said body comprising a continuation of the said transparent layer and a lens integral with said cover.
- An incandescent electric lamp adapted for the projection of a concentrated beam of light comprising a frusto-conical body having a light source mounted on support members within said body, a bead of light reflectin material connecting said supporting mem ers, a layer of light reflecting material upon the surface of said body, a base at the smaller end of said body, a cover for the upper end thereof and a lens integral with said cover.
- An incandescent electric lamp adapted for the projection of a concentrated beam of light comprising a frusto-conical body having alight reflecting inner layer and an outer transparent layer fused thereto, a
- concentrated light source disposed wlthm said body and carried on support members, a bead of light reflecting material connect ing said supporting members, a base at the smaller end of said body and a cover for the larger end of said body comprising a con- 'tinuation of one of said layers and a lens integral with said cover.
Description
July 28, 1925. 1,547,747
J. C. GROGAN INCANDESCENT ELECTRI C LAMP Filed Jan. 24, 1921 4 OPAL GLASS LEARGLASS INVENTOR JACOB GQROQAN ATTORNEY Patented ul 28, 1925.
UNITED STATES PATENT OFFICE "JACOB O. GROGAN, OF NEWARK, NEW JERSEY, ASSIGNOR TO WESTINGHOUSE LAMP COMPANY, A CORPORATION OF PENNSYLVANIA.
INOANDESCENT ELECTRIC LAMP,
Application filed January 24, 1921. Serial No. 489,872.
Tofilkwirom it may concern:
Be it known that I, JAooB G. ,GRocAN, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Incandescent Electrio Lamps, of which the following is a specification.
My invention relates to improvements in incandescent lamps, particularly of the miniature type.
Miniature lamps heretofore manufactured for use in the dental and medical professions have not met requirements chiefly because they have given scattered llght of non-uniform intensity. It is an object of this invention to meet such requirements by providin a lamp which will pro3ect a sharply efined circular spot of light of unlform intensity.
In the accompanying drawmg F g. 1 s a plan or top view of my lam Flg. 1s a side view; and Fig. 3 is an en arged view, partly in section. 0
Like numerals indicate like parts in the several views.
My lamp includes the usual base 2 having a bulb 3 cemented thereto in the usual manner. The bulb, as illustrated, is substantially of frusto-conical shape, and the larger end thereof is provided with a lens 4, formed as an integral part of the bulb.
The bulb 3 is composed of two layers of glass, as is usual in lamps of this class, being formed by fusing a tube of so-called opal glass within and to a tube of clear glass. The clear or transparent tube 1s of such greater length than the opal tube that, when in a plastic state, it may be molded to close the end of the tube and to form a lens thereon.
In practicing my invention, I form the bulb of frusto-conical shape, the side walls of which are rendered opaque or translucent by the layer 5 which is combined with, or fused to, layer 6. My lamp, therefore, differs from previous lamps partly in having side walls so formed and disposed as to provide a reflecting surface having such relation to the luminous source that the reflecte? ra s will be directed through the lens I an thereby generally improving the optical system. The smaller end of the bulb is secured to the screw plug or base 2.
A filament 7 is mounted upon supports 8 The small size of my lamp and the fact that'it produces a sharply defined circular spot of light of uniform intensity make it especially applicable to a variety of uses.
at I claim is: 1. An incandescent electric lamp adapted for the projection of a concentrated beam of light, comprising a frusto-conical' body having an inner light reflecting layer and an outer transparent layer fused thereto, a concentrated light source disposed within said body, a base at the lower end of the body, a cover for the upper end of said body comprising a continuation of the said transparent layer and a lens integral with said cover.
2. An incandescent electric lamp adapted for the projection of a concentrated beam of light comprising a frusto-conical body having a light source mounted on support members within said body, a bead of light reflectin material connecting said supporting mem ers, a layer of light reflecting material upon the surface of said body, a base at the smaller end of said body, a cover for the upper end thereof and a lens integral with said cover.
3. An incandescent electric lamp adapted for the projection of a concentrated beam of light. comprising a frusto-conical body having alight reflecting inner layer and an outer transparent layer fused thereto, a
concentrated light source disposed wlthm said body and carried on support members, a bead of light reflecting material connect ing said supporting members, a base at the smaller end of said body and a cover for the larger end of said body comprising a con- 'tinuation of one of said layers and a lens integral with said cover.
' In testimony whereof, I have hereunto subscribed my name this 22nd day of January, 1921.
' JACOB 0.; GROGAN. I
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US439372A US1547747A (en) | 1921-01-24 | 1921-01-24 | Incandescent electric lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US439372A US1547747A (en) | 1921-01-24 | 1921-01-24 | Incandescent electric lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1547747A true US1547747A (en) | 1925-07-28 |
Family
ID=23744456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US439372A Expired - Lifetime US1547747A (en) | 1921-01-24 | 1921-01-24 | Incandescent electric lamp |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1547747A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2419961A (en) * | 1944-06-09 | 1947-05-06 | Julian A Links | Motion-picture projection apparatus |
| US3188512A (en) * | 1960-12-22 | 1965-06-08 | Welch Allyn Inc | Miniature lamp and method for making it |
| US5508587A (en) * | 1992-11-13 | 1996-04-16 | Williams; Ronald R. | Incandescent lamp use with an optical fiber |
| EP0893818A2 (en) * | 1997-07-23 | 1999-01-27 | Corning Incorporated | Lamp envelope with integrated optics |
| US6198213B1 (en) | 1997-07-23 | 2001-03-06 | Corning Incorporated | Lamp envelope with integrated optics |
-
1921
- 1921-01-24 US US439372A patent/US1547747A/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2419961A (en) * | 1944-06-09 | 1947-05-06 | Julian A Links | Motion-picture projection apparatus |
| US3188512A (en) * | 1960-12-22 | 1965-06-08 | Welch Allyn Inc | Miniature lamp and method for making it |
| US5508587A (en) * | 1992-11-13 | 1996-04-16 | Williams; Ronald R. | Incandescent lamp use with an optical fiber |
| EP0893818A2 (en) * | 1997-07-23 | 1999-01-27 | Corning Incorporated | Lamp envelope with integrated optics |
| EP0893818A3 (en) * | 1997-07-23 | 1999-04-14 | Corning Incorporated | Lamp envelope with integrated optics |
| US6198213B1 (en) | 1997-07-23 | 2001-03-06 | Corning Incorporated | Lamp envelope with integrated optics |
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