GB1090888A - Improvements relating to polishing mirrors and reflectors - Google Patents

Improvements relating to polishing mirrors and reflectors

Info

Publication number
GB1090888A
GB1090888A GB4895065A GB4895065A GB1090888A GB 1090888 A GB1090888 A GB 1090888A GB 4895065 A GB4895065 A GB 4895065A GB 4895065 A GB4895065 A GB 4895065A GB 1090888 A GB1090888 A GB 1090888A
Authority
GB
United Kingdom
Prior art keywords
mirror
mirrors
granules
polishing
reciprocated
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
GB4895065A
Inventor
Haydn Wilkinson Littlewood
Kenneth Vyvyan Merricks
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB4895065A priority Critical patent/GB1090888A/en
Publication of GB1090888A publication Critical patent/GB1090888A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

1,090,888. Polishing. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 2, 1966 [Nov. 17, 1965], No. 48950/65. Heading B3D. A process for polishing concave mirrors or reflectors comprises using the mirror or reflector as a container for granular material and rotating and/or vibrating the mirror or reflector so that the granular material acts on the surface thereof. The mirror is initially formed from a sheet 1, Fig. 1, of aluminium which is clamped between members 2a, 2b and stretched over a former 6, the members forming an annular ring 4, Fig. 2, on the mirror. A pair of mirrors are then joined face-to-face with a gasket 10, Fig. 4, between the rings and the space 12 between the mirrors is half-filled with ceramic chippings, cutting compound and water 11. The assembly is rotated about an inclined axis so that a matt surface is formed on the mirrors, a pressure relief valve 10a being provided. After separation, the mirrors are cleaned and degreased which smooths the surface further. The mirror 1a, Fig. 6, is then mounted on a platform 16 which is supported on leaf-springs 15 and reciprocated by an adjustable link 18 driven by an eccentric 19 from an electric motor 17. The platform 16 also carries an electric motor which slowly rotates the mirror as it is reciprocated. The surface of the mirror is treated as it is reciprocated and rotated by coarse coconut granules or hard wood sawdust impregnated with wax and may be further finished by finer coconut granules. A paddle or Archimedean screw may be inserted into the granules to prevent them sticking to the surface of the mirror. A final polishing may be effected by using a small pad of granules with the mirror tilted at an angle of 22¢ degrees. A plastic strippable coat is sprayed on to the mirror and the rim turned off. Finally, the mirror is anodized by immersion in a bath of tri-sodium phosphate and other chemicals, a current of 300 amps. being supplied to the mirror through aluminium studs 7 welded to the back of the mirror.
GB4895065A 1965-11-17 1965-11-17 Improvements relating to polishing mirrors and reflectors Expired GB1090888A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4895065A GB1090888A (en) 1965-11-17 1965-11-17 Improvements relating to polishing mirrors and reflectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4895065A GB1090888A (en) 1965-11-17 1965-11-17 Improvements relating to polishing mirrors and reflectors

Publications (1)

Publication Number Publication Date
GB1090888A true GB1090888A (en) 1967-11-15

Family

ID=10450571

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4895065A Expired GB1090888A (en) 1965-11-17 1965-11-17 Improvements relating to polishing mirrors and reflectors

Country Status (1)

Country Link
GB (1) GB1090888A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487730A1 (en) * 1980-08-01 1982-02-05 Mathia Tadeusz Automated shaping and polishing of large concave reflectors - by moulding, forming, polishing and selective coating of ductile metal or plastics sheet
WO2016129700A1 (en) * 2015-02-15 2016-08-18 弘明 城戸 Polishing method for concave surface in hard object to be polished

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487730A1 (en) * 1980-08-01 1982-02-05 Mathia Tadeusz Automated shaping and polishing of large concave reflectors - by moulding, forming, polishing and selective coating of ductile metal or plastics sheet
WO2016129700A1 (en) * 2015-02-15 2016-08-18 弘明 城戸 Polishing method for concave surface in hard object to be polished
JPWO2016129700A1 (en) * 2015-02-15 2017-06-08 城戸 弘明 Concave surface polishing method for hard polishing object

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