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GB218135A - An improved protractor - Google Patents

An improved protractor

Info

Publication number
GB218135A
GB218135A GB2007823A GB2007823A GB218135A GB 218135 A GB218135 A GB 218135A GB 2007823 A GB2007823 A GB 2007823A GB 2007823 A GB2007823 A GB 2007823A GB 218135 A GB218135 A GB 218135A
Authority
GB
United Kingdom
Prior art keywords
marked
improved protractor
protractor
improved
dorsie
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
GB2007823A
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.)
Cameron & Roberton Ltd
JAMES CULROSS DORSIE
Original Assignee
Cameron & Roberton Ltd
JAMES CULROSS DORSIE
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 Cameron & Roberton Ltd, JAMES CULROSS DORSIE filed Critical Cameron & Roberton Ltd
Priority to GB2007823A priority Critical patent/GB218135A/en
Publication of GB218135A publication Critical patent/GB218135A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • Drawing Aids And Blackboards (AREA)

Abstract

218,135. Cameron & Robertson, Ltd., and Dorsie, J. C. Aug. 7, 1923. Protractors.-Two quadrants 1, 2 are pivoted together at their common centre of curvature 3, one being marked with angular graduations while the other is marked with two radial lines 4, 5 at right-angles to each other against one of which the angle to be measured is read off on the graduated quadrant.
GB2007823A 1923-08-07 1923-08-07 An improved protractor Expired GB218135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2007823A GB218135A (en) 1923-08-07 1923-08-07 An improved protractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2007823A GB218135A (en) 1923-08-07 1923-08-07 An improved protractor

Publications (1)

Publication Number Publication Date
GB218135A true GB218135A (en) 1924-07-03

Family

ID=10139986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2007823A Expired GB218135A (en) 1923-08-07 1923-08-07 An improved protractor

Country Status (1)

Country Link
GB (1) GB218135A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562224A (en) * 1945-03-29 1951-07-31 Warren B Weyrick Protractor
US2959861A (en) * 1958-04-17 1960-11-15 Martin G Stromquist Bevel protractor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562224A (en) * 1945-03-29 1951-07-31 Warren B Weyrick Protractor
US2959861A (en) * 1958-04-17 1960-11-15 Martin G Stromquist Bevel protractor

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