GB1184704A - Improvements in or relating to Combinations of a Projection Lamp and Elliptical Condenser Mirror and to Projection Lamps for use in such combinations - Google Patents
Improvements in or relating to Combinations of a Projection Lamp and Elliptical Condenser Mirror and to Projection Lamps for use in such combinationsInfo
- Publication number
- GB1184704A GB1184704A GB25267/67A GB2526767A GB1184704A GB 1184704 A GB1184704 A GB 1184704A GB 25267/67 A GB25267/67 A GB 25267/67A GB 2526767 A GB2526767 A GB 2526767A GB 1184704 A GB1184704 A GB 1184704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- combinations
- projection
- bulb
- mirror
- screen
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/26—Screens; Filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K7/00—Lamps for purposes other than general lighting
- H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
1,184,704. Electric incandescent lamps. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 1 June, 1967 [4 June, 1966], No. 25267/67. Heading H1F. A projector lamp is combined with an elliptical mirror and has a filament 6 arranged at the focus of the mirror and surrounded by a wire screen 11. The mirror may be outside or inside the lamp or, as shown, may take the form of a cold-light coating 15 on an ellipsoidal portion 3-4-3 of the bulb 2. The opposite side of the bulb may be of spherical form and have a reflective coating with a window 5-5. The screen, which prevents blackening of the bulb, consists of a plurality of wire loops 12 attached to a pair of stay wires 13 and is supported, through insulating glass beads 14, by the leadin wires 8. The filament 6 is in the form of a flattened coil which is less than 5 mm. from the screen.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL6607798A NL6607798A (en) | 1966-06-04 | 1966-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1184704A true GB1184704A (en) | 1970-03-18 |
Family
ID=19796796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25267/67A Expired GB1184704A (en) | 1966-06-04 | 1967-06-01 | Improvements in or relating to Combinations of a Projection Lamp and Elliptical Condenser Mirror and to Projection Lamps for use in such combinations |
Country Status (5)
Country | Link |
---|---|
US (1) | US3458746A (en) |
DE (1) | DE1572759A1 (en) |
ES (1) | ES341298A1 (en) |
GB (1) | GB1184704A (en) |
NL (1) | NL6607798A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT355200B (en) * | 1978-01-23 | 1980-02-25 | Espe Pharm Praep | RADIATION DEVICE FOR THE CURING OF RADIANT DIMENSIONS |
US4297611A (en) * | 1979-10-02 | 1981-10-27 | Wagner Electric Corporation | Control of tungsten filament erosion in a halogen lamp |
US20060186816A1 (en) * | 2003-07-28 | 2006-08-24 | Koninklijke Philips Electronics N.V. | Electric lamp |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA650355A (en) * | 1962-10-16 | Honing Wilhelm | Electric incandescent lamp | |
BE441281A (en) * | 1940-01-19 | |||
NL80117C (en) * | 1948-02-21 | |||
US3025424A (en) * | 1958-06-16 | 1962-03-13 | Gen Electric | Electric lamp |
US3174067A (en) * | 1960-07-21 | 1965-03-16 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Construction for projection lamps eliminating undesired infrared radiation |
-
1966
- 1966-06-04 NL NL6607798A patent/NL6607798A/xx unknown
-
1967
- 1967-05-15 US US638338A patent/US3458746A/en not_active Expired - Lifetime
- 1967-05-30 DE DE19671572759 patent/DE1572759A1/en active Pending
- 1967-06-01 GB GB25267/67A patent/GB1184704A/en not_active Expired
- 1967-06-02 ES ES341298A patent/ES341298A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES341298A1 (en) | 1968-10-16 |
NL6607798A (en) | 1967-12-05 |
DE1572759A1 (en) | 1970-02-12 |
US3458746A (en) | 1969-07-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |