GB494480A - Improvements in or relating to moulds for the manufacture of reflectors - Google Patents
Improvements in or relating to moulds for the manufacture of reflectorsInfo
- Publication number
- GB494480A GB494480A GB4593/38A GB459338A GB494480A GB 494480 A GB494480 A GB 494480A GB 4593/38 A GB4593/38 A GB 4593/38A GB 459338 A GB459338 A GB 459338A GB 494480 A GB494480 A GB 494480A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflectors
- faces
- moulding
- glass
- reflector
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
- G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
494,480. Glass manufacture'; moulding synthetic resins ; reflectors. ALTMANN, H. Feb. 14, 1938, No. 4593. Convention date, Feb. 13, 1937. [Class 56] [Also in Groups V and XX] A built-up mould, for use in making reflectors from glass or artificial resin, comprises a number of moulding-units each having an hexagonal cross-section and provided with six moulding- faces a, Fig. 1, which converge towards the longitudinal axis of the unit. The apex d of the unit may be cut off at right-angles to its longitudinal axis to form a flat surface b which forms on the reflector a "window" through which light can pass, thus enabling the reflector to be used as the glass of a rear lamp of a vehicle. At least one bf the units can be fitted with a sliding plunger e, Fig. 3, the top of which constitutes the window-forming area b. The plunger is used to remove the finished article from the mould. The hexagons may be of various dimensions to form faces a of different sizes, and the faces may converge to an edge instead of the point d. Specification 269,760, [Class 56], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL494480X | 1937-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB494480A true GB494480A (en) | 1938-10-26 |
Family
ID=19786714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4593/38A Expired GB494480A (en) | 1937-02-13 | 1938-02-14 | Improvements in or relating to moulds for the manufacture of reflectors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB494480A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2538638A (en) * | 1939-07-17 | 1951-01-16 | Wilson Herbert Frederick | Mold for making reflectors |
US2700219A (en) * | 1951-08-06 | 1955-01-25 | Ross C Lindley | Dental platen |
US3069721A (en) * | 1960-03-04 | 1962-12-25 | Ciba Ltd | Tools for making surface patterns |
US3363875A (en) * | 1963-12-05 | 1968-01-16 | Hedgewick Peter | Molding apparatus for reflectors |
GB2347379A (en) * | 1999-01-22 | 2000-09-06 | Sony Corp | Moulding an optical element |
GB2365142A (en) * | 2000-07-27 | 2002-02-13 | Michael John Downs | Jamin type interferometer, retroreflector and manufacture of beam splitter |
US6552863B1 (en) | 1999-01-22 | 2003-04-22 | Sony Corporation | Optical element, its manufacturing method and optical element manufacture metal die |
-
1938
- 1938-02-14 GB GB4593/38A patent/GB494480A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2538638A (en) * | 1939-07-17 | 1951-01-16 | Wilson Herbert Frederick | Mold for making reflectors |
US2700219A (en) * | 1951-08-06 | 1955-01-25 | Ross C Lindley | Dental platen |
US3069721A (en) * | 1960-03-04 | 1962-12-25 | Ciba Ltd | Tools for making surface patterns |
US3363875A (en) * | 1963-12-05 | 1968-01-16 | Hedgewick Peter | Molding apparatus for reflectors |
GB2347379B (en) * | 1999-01-22 | 2002-10-30 | Sony Corp | Optical element and its manufacture |
GB2347379A (en) * | 1999-01-22 | 2000-09-06 | Sony Corp | Moulding an optical element |
US6721097B2 (en) | 1999-01-22 | 2004-04-13 | Sony Corporation | Optical element, its manufacturing method and optical element manufacturing metal die |
US6552863B1 (en) | 1999-01-22 | 2003-04-22 | Sony Corporation | Optical element, its manufacturing method and optical element manufacture metal die |
EP1180699A2 (en) * | 2000-07-27 | 2002-02-20 | Michael John Downs | Jamin-type interferometers and components therefor |
EP1180699A3 (en) * | 2000-07-27 | 2002-11-06 | Michael John Downs | Jamin-type interferometers and components therefor |
GB2365142B (en) * | 2000-07-27 | 2002-06-19 | Michael John Downs | Jamin-type interferometers and components therefor |
US6678056B2 (en) | 2000-07-27 | 2004-01-13 | Michael John Downs | Jamin-type interferometers and components therefor |
GB2365142A (en) * | 2000-07-27 | 2002-02-13 | Michael John Downs | Jamin type interferometer, retroreflector and manufacture of beam splitter |
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