GB587768A - Improved means for grinding polishing or similarly treating surfaces of aspherical form - Google Patents

Improved means for grinding polishing or similarly treating surfaces of aspherical form

Info

Publication number
GB587768A
GB587768A GB142545A GB142545A GB587768A GB 587768 A GB587768 A GB 587768A GB 142545 A GB142545 A GB 142545A GB 142545 A GB142545 A GB 142545A GB 587768 A GB587768 A GB 587768A
Authority
GB
United Kingdom
Prior art keywords
grinding
slide
aspherical
work
wheel
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
GB142545A
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.)
EDWARD WILFRED TAYLOR
Cooke Troughton and Simms Ltd
Original Assignee
EDWARD WILFRED TAYLOR
Cooke Troughton and Simms 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 EDWARD WILFRED TAYLOR, Cooke Troughton and Simms Ltd filed Critical EDWARD WILFRED TAYLOR
Priority to GB142545A priority Critical patent/GB587768A/en
Publication of GB587768A publication Critical patent/GB587768A/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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/06—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes
    • B24B13/065—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes using a template

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

587,768. Grinding aspherical lenses. COOKE, TROUGHTON, & SIMMS, Ltd., and TAYLOR, E. W. Jan. 17, 1945, No. 1425. [Class 60] In a machine for grinding, polishing or similarly treating a work-piece, such as a lens or mould member for plastic lenses, to produce an aspherical surface thereon, the work-piece is rotated about an axis whilst a grinding or like treating means is traversed across the surface to be treated, the traverse movements being determined by the path traced by a tracing element moving over the surface of an aspherical three - dimensional matrix, the adjustment of the aspherical matrix and the restraint of movement imposed on the tracing element being such that the desired aspherical surface is generated by the traverse of the grinding or treating means. The matrix may be a conical body. The work 10 is mounted in a chuck 9 on a spindle 6, carrying a pulley 7A and mounted in a headstock 5, adjustable by lead screw 7. The grinding wheel or lap 11, rotated by a pulley 38, is carried by a slide 30, mounted for transverse movement in a slide 29, mounted for longitudinal movement on the machine frame. The slide 30 also carries followers 42, 43 one of which, according to whether a convex or concave curve is required, is in contact with the surface of a cone 22 attached to a bracket 21 mounted on a tapered pin 20 projecting from a slide block 19, vertically adjustable on post 16 by means of slip gauges inserted between prepared faces 44, 45; the cone is adjustable about the pin 20 by worm and worm-wheel 23, 24 operated by knob 26. The post 16 is carried by a slide 13, movable on a slide 13A which is mounted on part 12 of the machine frame by a pivot 14. By means of a microscope built into the spindle 6 and sighting marks let into the axis of the grinding-wheel, accurate correlation of the work and tool can be obtained.
GB142545A 1945-01-17 1945-01-17 Improved means for grinding polishing or similarly treating surfaces of aspherical form Expired GB587768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB142545A GB587768A (en) 1945-01-17 1945-01-17 Improved means for grinding polishing or similarly treating surfaces of aspherical form

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB142545A GB587768A (en) 1945-01-17 1945-01-17 Improved means for grinding polishing or similarly treating surfaces of aspherical form

Publications (1)

Publication Number Publication Date
GB587768A true GB587768A (en) 1947-05-05

Family

ID=9721797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB142545A Expired GB587768A (en) 1945-01-17 1945-01-17 Improved means for grinding polishing or similarly treating surfaces of aspherical form

Country Status (1)

Country Link
GB (1) GB587768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2365084A1 (en) * 1972-12-29 1974-08-08 Essilor Int DEVICE FOR CREATING CONCAVERED OR CONVEX ASPHAERICAL SURFACES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2365084A1 (en) * 1972-12-29 1974-08-08 Essilor Int DEVICE FOR CREATING CONCAVERED OR CONVEX ASPHAERICAL SURFACES

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