FR494539A - Device for describing parabolas and for polishing parabolic surfaces - Google Patents

Device for describing parabolas and for polishing parabolic surfaces

Info

Publication number
FR494539A
FR494539A FR494539DA FR494539A FR 494539 A FR494539 A FR 494539A FR 494539D A FR494539D A FR 494539DA FR 494539 A FR494539 A FR 494539A
Authority
FR
France
Prior art keywords
parabolas
polishing
describing
parabolic surfaces
parabolic
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
Other languages
French (fr)
Inventor
Knut Emil Teodor Johnsson
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.)
KNUT EMIL TEODOR JOHNSSON
Original Assignee
KNUT EMIL TEODOR JOHNSSON
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 KNUT EMIL TEODOR JOHNSSON filed Critical KNUT EMIL TEODOR JOHNSSON
Application granted granted Critical
Publication of FR494539A publication Critical patent/FR494539A/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
    • B24B13/015—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor of television picture tube viewing panels, headlight reflectors or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR494539D 1919-01-07 1919-01-07 Device for describing parabolas and for polishing parabolic surfaces Expired FR494539A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR494539T 1919-01-07

Publications (1)

Publication Number Publication Date
FR494539A true FR494539A (en) 1919-09-11

Family

ID=1530167

Family Applications (1)

Application Number Title Priority Date Filing Date
FR494539D Expired FR494539A (en) 1919-01-07 1919-01-07 Device for describing parabolas and for polishing parabolic surfaces

Country Status (1)

Country Link
FR (1) FR494539A (en)

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