GB693643A - Angle measuring instrument - Google Patents

Angle measuring instrument

Info

Publication number
GB693643A
GB693643A GB29598/50A GB2959850A GB693643A GB 693643 A GB693643 A GB 693643A GB 29598/50 A GB29598/50 A GB 29598/50A GB 2959850 A GB2959850 A GB 2959850A GB 693643 A GB693643 A GB 693643A
Authority
GB
United Kingdom
Prior art keywords
graduation
reading
image
lines
line
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
GB29598/50A
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.)
ZEISS OPTON OPTISCHE WERKE
Original Assignee
ZEISS OPTON OPTISCHE WERKE
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 ZEISS OPTON OPTISCHE WERKE filed Critical ZEISS OPTON OPTISCHE WERKE
Publication of GB693643A publication Critical patent/GB693643A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00—Measuring angles
    • G01C1/02—Theodolites
    • G01C1/06—Arrangements for reading scales
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00—Measuring angles
    • G01C1/02—Theodolites
    • 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
    • G01D5/28—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 deflection of beams of light, e.g. for direct optical indication

Abstract

693,643. Angle measuring instruments; scale reading apparatus. ZEISS - OPTON OPTISCHE WERKE OBERKOCHEN GES. Dec. 4, 1950 [Dec. 8, 1949], No. 29598/50. Classes 97 (i) and 97 (ii) In an angle-measuring instrument such as a theodolite, in which double lines are produced by forming in the plane of a graduation 3, Fig. 1, the image of a diametrically opposed graduation 31, four graduation lines, each separated by a right angle, are combined into double lines so as to obtain the mean of four reading positions simultaneously. The prism 7, which in conjunction with lenses 6 and prism 8 forms an image of graduation 3<SP>1</SP> which may be viewed by microscope 5, has an additional prism 10 cemented thereupon to avoid the numbering 41 of the graduation 3<SP>1</SP> causing a confusing image adjacent the numbering 4. The two sets of double lines are presented in the reading microscope as counter-running images as shown in Fig. 4, the images being displaced into coincidence by plane parallel plates or movable wedges, the corresponding image displacement being read off on accessory scale such as a micrometer screw. In a modification, Fig. 5, two sets of graduations are applied in a single operation by two dividing engines displaced against one another by half a right angle plus or minus half a line interval so that the lines of one graduation lie between those of the other. A line of one graduation, say 0, is then combined with the diametrically-opposed line 150a of the other graduation and presented as a counterrunning image to the double line formed from 100 and 250a. If the reading is repeated in the second telescope position the mean of eight reading places is obtained.
GB29598/50A 1949-12-08 1950-12-04 Angle measuring instrument Expired GB693643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE693643X 1949-12-08

Publications (1)

Publication Number Publication Date
GB693643A true GB693643A (en) 1953-07-01

Family

ID=6605035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29598/50A Expired GB693643A (en) 1949-12-08 1950-12-04 Angle measuring instrument

Country Status (1)

Country Link
GB (1) GB693643A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094469B (en) * 1956-05-15 1960-12-08 Continental Elektro Ind Ag Angle measuring device, especially theodolite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094469B (en) * 1956-05-15 1960-12-08 Continental Elektro Ind Ag Angle measuring device, especially theodolite

Similar Documents

Publication Publication Date Title
GB693643A (en) Angle measuring instrument
GB698800A (en) Improvements in or relating to devices for directly measuring and instantaneously recording the angular displacements of a body
US1544090A (en) Measuring device
GB574295A (en) Improvements in scale-reading means for angle measuring instruments or devices
GB733756A (en) A new and improved device for measuring and/or indicating angles
SU97976A1 (en) Goniometric tool
GB760881A (en) A reading device for scales and the like
Allan The accurate measurement of a short line by Geodimeter model 6
GB715636A (en) Improvements in or relating to instruments for measuring the thickness of transparent materials
SU823853A1 (en) Optical meter of techological values
GB901319A (en) Improvements relating to optical measuring apparatus
Emery Hints to Hydrographic Surveyors: Small Coordinatograph
US892731A (en) Angle-measuring instrument with telescope.
GB1126928A (en) An improvement in or relating to measuring instruments
GB563973A (en) Optical comparators
GB638607A (en) Improvements in and relating to scale reading instruments
GB615183A (en) Improvements in scale reading devices for instruments for measuring angles
SU149886A1 (en) Sampling device for measuring small linear displacements
SU97186A1 (en) Theodolite
GB692617A (en) Improvements in optical instruments
GB688819A (en) Improvements in or relating to electroscopes
GB991873A (en) Equipment for indicating the amount of the displacement of a moving part
Djurle et al. Photoelectric indicator for precision setting in co-ordinate measurements
Wright ART. XLVIII.--A Telemeter with Micrometer Screw Adjustment
GB599708A (en) Improvements in optical magnifying apparatus