GB1387589A - Lenses - Google Patents

Lenses

Info

Publication number
GB1387589A
GB1387589A GB3703171A GB3703171A GB1387589A GB 1387589 A GB1387589 A GB 1387589A GB 3703171 A GB3703171 A GB 3703171A GB 3703171 A GB3703171 A GB 3703171A GB 1387589 A GB1387589 A GB 1387589A
Authority
GB
United Kingdom
Prior art keywords
grooves
another
cutter
lenses
recess
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
GB3703171A
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.)
Lucas Electrical Co Ltd
Original Assignee
Lucas Electrical Co Ltd
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 Lucas Electrical Co Ltd filed Critical Lucas Electrical Co Ltd
Priority to GB3703171A priority Critical patent/GB1387589A/en
Priority to AU44713/72A priority patent/AU470060B2/en
Priority to IT27217/72A priority patent/IT974630B/en
Priority to DE2236167A priority patent/DE2236167C2/en
Priority to FR7226882A priority patent/FR2148434B1/fr
Priority to ES405829A priority patent/ES405829A1/en
Publication of GB1387589A publication Critical patent/GB1387589A/en
Expired legal-status Critical Current

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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

1387589 Making moulds for lenses LUCAS ELECTRICAL CO Ltd 12 July 1972 [6 Aug 1971] 37031/71 Heading B3K [Also in Division F4] A method of making a metallic mould for use in the manufacture of synthetic resin lenses for motor vehicle signalling lamps comprises the steps of using a rotating ellipsoidal or spherical cutter to cut a recess in a metal plate, moving the plate and cutter linearly relative to one another so that the cutter extends the recess to form a groove having a right cylindrical mid region 12 and end regions 13 each of which has the form of part of the body of revolution of the transverse cross-section of the mid region, repeating the process to cut further grooves in axial alignment with one another to produce a first row of grooves, and similarly cutting further rows of grooves parallel to the first row. The grooves preferably overlap one another so that, when viewed in plane, each groove appears to have a rectangular periphery the lengths of the sides of which are in the ratio of 2 : 1.
GB3703171A 1971-08-06 1971-08-06 Lenses Expired GB1387589A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB3703171A GB1387589A (en) 1971-08-06 1971-08-06 Lenses
AU44713/72A AU470060B2 (en) 1971-08-06 1972-07-19 Lenses
IT27217/72A IT974630B (en) 1971-08-06 1972-07-20 LENSES PARTICULARLY INTENDED FOR USE ON VEHICLE HEADLIGHTS
DE2236167A DE2236167C2 (en) 1971-08-06 1972-07-24 Diffuser and method for producing a casting mold for the manufacture of the diffuser
FR7226882A FR2148434B1 (en) 1971-08-06 1972-07-26
ES405829A ES405829A1 (en) 1971-08-06 1972-08-03 Lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3703171A GB1387589A (en) 1971-08-06 1971-08-06 Lenses

Publications (1)

Publication Number Publication Date
GB1387589A true GB1387589A (en) 1975-03-19

Family

ID=10393179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3703171A Expired GB1387589A (en) 1971-08-06 1971-08-06 Lenses

Country Status (6)

Country Link
AU (1) AU470060B2 (en)
DE (1) DE2236167C2 (en)
ES (1) ES405829A1 (en)
FR (1) FR2148434B1 (en)
GB (1) GB1387589A (en)
IT (1) IT974630B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198182A (en) * 1975-09-20 1980-04-15 Lucas Industries Limited Method of manufacturing a mould for producing a lamp lens element
EP0017356A1 (en) * 1979-03-23 1980-10-15 LUCAS INDUSTRIES public limited company Lens element

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1546805A (en) * 1975-09-20 1979-05-31 Lucas Industries Ltd Method of manufacturing a mould for producing a lens element and mould manufactured by that method
DE10210780A1 (en) * 2002-03-12 2004-04-08 Hella Kg Hueck & Co. Interior light for vehicles with a lens
DE102004042125B4 (en) * 2004-08-30 2008-05-08 Schefenacker Vision Systems Germany Gmbh & Co. Kg Lighting unit with a large number of curved surface elements
JP6486332B2 (en) * 2014-04-11 2019-03-20 株式会社クラレ Light diffusion pattern design method, light diffusion plate manufacturing method, and light diffusion plate

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137079A (en) * 1935-11-22 1938-11-15 Gen Motors Corp Lens
US2890627A (en) * 1950-03-04 1959-06-16 Gen Motors Corp Method for making lens mold
US2758200A (en) * 1950-07-22 1956-08-07 Holophane Co Inc Light transmitters and diffusers
AT247456B (en) * 1963-07-15 1966-06-10 Austrolux Wiener Elektro Glass, in particular artificial glass for lighting
DE1447102A1 (en) * 1964-11-21 1969-07-10 Vni Swetotechnitscheskij I Diffuser for lights with reflective optics
GB1301659A (en) * 1969-05-12 1973-01-04

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198182A (en) * 1975-09-20 1980-04-15 Lucas Industries Limited Method of manufacturing a mould for producing a lamp lens element
EP0017356A1 (en) * 1979-03-23 1980-10-15 LUCAS INDUSTRIES public limited company Lens element

Also Published As

Publication number Publication date
AU4471372A (en) 1974-02-07
AU470060B2 (en) 1976-03-04
ES405829A1 (en) 1976-01-16
DE2236167C2 (en) 1984-02-09
DE2236167A1 (en) 1973-02-15
FR2148434A1 (en) 1973-03-23
FR2148434B1 (en) 1976-01-16
IT974630B (en) 1974-07-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
732 Registration of transactions, instruments or events in the register (sect. 32/1977)