GB599324A - Improved scale-reading arrangement for machine tools - Google Patents

Improved scale-reading arrangement for machine tools

Info

Publication number
GB599324A
GB599324A GB2378445A GB2378445A GB599324A GB 599324 A GB599324 A GB 599324A GB 2378445 A GB2378445 A GB 2378445A GB 2378445 A GB2378445 A GB 2378445A GB 599324 A GB599324 A GB 599324A
Authority
GB
United Kingdom
Prior art keywords
scale
prism
screen
machine tools
eyepiece
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
GB2378445A
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.)
E R Watts & Son Ltd
VICTOR WILLIAM HENRY TOWNS
Original Assignee
E R Watts & Son Ltd
VICTOR WILLIAM HENRY TOWNS
Filing date
Publication date
Application filed by E R Watts & Son Ltd, VICTOR WILLIAM HENRY TOWNS filed Critical E R Watts & Son Ltd
Publication of GB599324A publication Critical patent/GB599324A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Telescopes (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

599,324. Indexing. WATTS & SON, Ltd., E.R., GODFREY, C. J., and TOWNS, V. W. H. Sept. 14, 1945, No. 23784. [Class 83 (iii)] [Also in Group XX] To eliminate centering and graduation errors in machine tools having a rotary circular table with a divided circle, the latter is read by an optical system which projects images of two diametrically opposite portions of the scale in superposition or juxtaposition on to a screen or into an eyepiece. As shown, a lamp 4 illuminates the scale 2 at diametrically opposite points by means of prism 5, lenses 6 and prism 8, the two images of these points of the scale being projected to the screen 14 via prism 9, lens 10, prism 12 and lens 13. A fine reading arrangement comprises a refractor block 7 pivoted about a vertical axis 15 to deflect one scale image, the fine reading scale 11 carried thereby also being visible on the screen 14 or in the eyepiece.
GB2378445A 1945-09-14 Improved scale-reading arrangement for machine tools Expired GB599324A (en)

Publications (1)

Publication Number Publication Date
GB599324A true GB599324A (en) 1948-03-10

Family

ID=1737924

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2378445A Expired GB599324A (en) 1945-09-14 Improved scale-reading arrangement for machine tools

Country Status (1)

Country Link
GB (1) GB599324A (en)

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