GB1128189A - Improvements in or relating to devices for centering elements of an optical system - Google Patents
Improvements in or relating to devices for centering elements of an optical systemInfo
- Publication number
- GB1128189A GB1128189A GB1165867A GB1165867A GB1128189A GB 1128189 A GB1128189 A GB 1128189A GB 1165867 A GB1165867 A GB 1165867A GB 1165867 A GB1165867 A GB 1165867A GB 1128189 A GB1128189 A GB 1128189A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holder
- support
- magnets
- contact surface
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2046—Positional adjustment of light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
1,128,189. Lamps. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 13 March, 1967 [16 March, 1966], No. 11658/67. Heading F4R. [Also in Divisions E2 and G2] A projector lamp 4 is mounted in a lamp holder 1 which is slidable on a contact surface of a fixed support 2 carrying a reflector 6, the holder being secured to the support by a magnetic holding action which can be rendered ineffective by sliding the holder to a different position relative to the support. Permanent magnets or electromagnets may be employed. In the embodiment shown three permanent magnets 7 are attached to the holder in an annular pattern and the contact surface of the support is provided with a similar pattern of highly permeable portions 8 separated by depressions 9. When the magnets are opposite the portions 8 the holder adheres tightly to the support and may be slidably adjusted over the contact surface by means of screws 10, but if the holder is rotated to bring the magnets opposite the depressions 9 the securing action becomes ineffective and the holder can be removed from the support. The lamp is carried by a cylindrical body 11 which is slidable axially in the holder 1 under the control of a screw 12 and is restrained from rotation by a pin 14 engaging a groove 13 in the body. Various patterns of magnets, highly permeable regions and unmagnetizable regions may be provided on the holder and support, each pattern permitting the locking action to be broken by rotating the holder. The body 11 may be attached to the holder 1 by a similar magnetic fastening.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL6603393A NL6603393A (en) | 1966-03-16 | 1966-03-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1128189A true GB1128189A (en) | 1968-09-25 |
Family
ID=19795989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1165867A Expired GB1128189A (en) | 1966-03-16 | 1967-03-13 | Improvements in or relating to devices for centering elements of an optical system |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH456188A (en) |
DE (1) | DE1597975A1 (en) |
FR (1) | FR1514722A (en) |
GB (1) | GB1128189A (en) |
NL (1) | NL6603393A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5738437A (en) * | 1996-08-27 | 1998-04-14 | Ilagan; Artemio M. | Attachment for light fixture cover |
-
1966
- 1966-03-16 NL NL6603393A patent/NL6603393A/xx unknown
-
1967
- 1967-03-11 DE DE19671597975 patent/DE1597975A1/en active Pending
- 1967-03-13 GB GB1165867A patent/GB1128189A/en not_active Expired
- 1967-03-13 CH CH362467A patent/CH456188A/en unknown
- 1967-03-16 FR FR99027A patent/FR1514722A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5738437A (en) * | 1996-08-27 | 1998-04-14 | Ilagan; Artemio M. | Attachment for light fixture cover |
Also Published As
Publication number | Publication date |
---|---|
NL6603393A (en) | 1967-09-18 |
FR1514722A (en) | 1968-02-23 |
DE1597975A1 (en) | 1970-10-08 |
CH456188A (en) | 1968-05-15 |
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