IT500078A - - Google Patents
Info
- Publication number
- IT500078A IT500078A IT500078DA IT500078A IT 500078 A IT500078 A IT 500078A IT 500078D A IT500078D A IT 500078DA IT 500078 A IT500078 A IT 500078A
- Authority
- IT
- Italy
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
- H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
- H01K1/325—Reflecting coating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL311971X | 1952-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT500078A true IT500078A (de) |
Family
ID=19783656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT500078D IT500078A (de) | 1952-03-04 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2799791A (de) |
| BE (1) | BE518131A (de) |
| CH (1) | CH311971A (de) |
| DE (1) | DE942341C (de) |
| FR (1) | FR1072116A (de) |
| GB (1) | GB728541A (de) |
| IT (1) | IT500078A (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3256456A (en) * | 1958-01-09 | 1966-06-14 | Sylvania Electric Prod | Reflector incandescent projection lamp |
| US3018403A (en) * | 1958-03-05 | 1962-01-23 | Westinghouse Electric Corp | Reflector lamp |
| US2904714A (en) * | 1958-06-16 | 1959-09-15 | Gen Electric | Electric lamp |
| GB904469A (en) * | 1960-02-11 | 1962-08-29 | Thorn Electrical Ind Ltd | Improvements in and relating to projection lamps |
| US3162785A (en) * | 1960-04-22 | 1964-12-22 | Sylvania Electric Prod | Projection lamp |
| US4280076A (en) * | 1978-10-18 | 1981-07-21 | Duro-Test Corporation | Incandescent lamp with structure for collecting evaporated filament material |
| US4446397A (en) * | 1981-09-28 | 1984-05-01 | General Electric Company | High intensity discharge lamp with infrared reflecting means for improving efficacy |
| FR2516204A1 (fr) * | 1981-11-06 | 1983-05-13 | Lampes Sa | Borne autonome d'eclairage |
| US4992695A (en) * | 1989-10-10 | 1991-02-12 | Daniel Naum | Reflector for high-intensity lamps |
| US5418420A (en) * | 1993-06-22 | 1995-05-23 | Ilc Technology, Inc. | Arc lamp with a triplet reflector including a concave parabolic surface, a concave elliptical surface and a convex parabolic surface |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE94157C (de) * | ||||
| DE339849C (de) * | 1919-03-06 | 1921-08-13 | Siemens & Halske Akt Ges | Lichtbogenbestrahlungslampe, die auf einer zweckmaessig in der Hoehe verstellbaren Saeule angeordnet ist |
| US1676300A (en) * | 1927-02-21 | 1928-07-10 | Sved Alexander | Incandescent electric lamp |
| BE391856A (de) * | 1931-11-16 | |||
| FR784648A (fr) * | 1933-12-01 | 1935-07-22 | Phare à faisceau aplati et élargi pouvant être réalisé par une lampe à incandescence convenablement agencée | |
| US2110590A (en) * | 1936-09-11 | 1938-03-08 | Birdseye Electric Corp | Reflecting incandescent lamp |
| US2272186A (en) * | 1939-07-19 | 1942-02-10 | Edward P Creehan | Radiant energy projector |
| US2362176A (en) * | 1943-03-25 | 1944-11-07 | Swanson Harold | Flashlight full-beam electric lamp |
| US2362172A (en) * | 1943-03-25 | 1944-11-07 | Swanson Harold | Vehicle headlight with integral full-beam electric lamps |
| US2362175A (en) * | 1943-03-25 | 1944-11-07 | Swanson Harold | Piped light full-beam electric lamp |
| NL69920C (de) * | 1948-03-05 |
-
0
- BE BE518131D patent/BE518131A/xx unknown
- IT IT500078D patent/IT500078A/it unknown
-
1953
- 1953-02-27 GB GB5539/53A patent/GB728541A/en not_active Expired
- 1953-03-01 DE DEN6826A patent/DE942341C/de not_active Expired
- 1953-03-02 CH CH311971D patent/CH311971A/de unknown
- 1953-03-02 FR FR1072116D patent/FR1072116A/fr not_active Expired
- 1953-03-03 US US340082A patent/US2799791A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CH311971A (de) | 1955-12-15 |
| US2799791A (en) | 1957-07-16 |
| FR1072116A (fr) | 1954-09-08 |
| DE942341C (de) | 1956-05-03 |
| GB728541A (en) | 1955-04-20 |
| BE518131A (de) |