GB494480A - Improvements in or relating to moulds for the manufacture of reflectors - Google Patents

Improvements in or relating to moulds for the manufacture of reflectors

Info

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
Application number
GB4593/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB494480A publication Critical patent/GB494480A/en
Expired legal-status Critical Current

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.
GB4593/38A 1937-02-13 1938-02-14 Improvements in or relating to moulds for the manufacture of reflectors Expired GB494480A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (13)

* Cited by examiner, † Cited by third party
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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