GB548114A - Improvements in gauges for measuring internal and external angles or working pieces and the like - Google Patents

Improvements in gauges for measuring internal and external angles or working pieces and the like

Info

Publication number
GB548114A
GB548114A GB393241A GB393241A GB548114A GB 548114 A GB548114 A GB 548114A GB 393241 A GB393241 A GB 393241A GB 393241 A GB393241 A GB 393241A GB 548114 A GB548114 A GB 548114A
Authority
GB
United Kingdom
Prior art keywords
arm
scale
projections
slot
angle
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
GB393241A
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.)
MICHAEL CHAROL PRAWDIN
Original Assignee
MICHAEL CHAROL PRAWDIN
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 MICHAEL CHAROL PRAWDIN filed Critical MICHAEL CHAROL PRAWDIN
Priority to GB393241A priority Critical patent/GB548114A/en
Publication of GB548114A publication Critical patent/GB548114A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00Measuring angles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Measuring instruments characterised by the use of mechanical techniques
    • G01B3/56Gauges for measuring angles or tapers, e.g. conical calipers

Abstract

548,114. Protractors. PRAWDIN, M. CHAROL-. March 24, 1941, No. 3932. [Class 97 (iii)] A protractor for measuring angles comprises a pair of caliper arms 5, 6 combined with a protractor scale 8 in such a manner that the arm 6 is movable and constitutes an indicating arm on the scale, each arm being provided with lateral projections 12 adapted to be brought into contact with the side of the angle to be measured. The arm 6 is guided on the scale 8 by means of a pin engaging in a slot 10 and a vernier 9 is provided. Of each pair of projections one may be fixed and the other slidable in a slot 11 or by means of a slider or both may be slidable and the arrangement is that the projections 12 are brought into contact with the sides of either an internal or an exernal angle. An additional arm 16 is provided the end of which is engaged, by means of a slot, with the rim of the scale so that the arm may pass over the indicating arm and be used for indicating some division of the angle. The projections 12 may, if desired, be carried on prolongations of the arms 5, 6 beyond the pivot 7.
GB393241A 1941-03-24 1941-03-24 Improvements in gauges for measuring internal and external angles or working pieces and the like Expired GB548114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB393241A GB548114A (en) 1941-03-24 1941-03-24 Improvements in gauges for measuring internal and external angles or working pieces and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB393241A GB548114A (en) 1941-03-24 1941-03-24 Improvements in gauges for measuring internal and external angles or working pieces and the like

Publications (1)

Publication Number Publication Date
GB548114A true GB548114A (en) 1942-09-25

Family

ID=9767597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB393241A Expired GB548114A (en) 1941-03-24 1941-03-24 Improvements in gauges for measuring internal and external angles or working pieces and the like

Country Status (1)

Country Link
GB (1) GB548114A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139365A (en) * 1983-04-16 1984-11-07 Timothy Charles Dearman Pipefitter's protractor
EP0332906A2 (en) * 1988-03-15 1989-09-20 Erwin Maier Mitre gauge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139365A (en) * 1983-04-16 1984-11-07 Timothy Charles Dearman Pipefitter's protractor
EP0332906A2 (en) * 1988-03-15 1989-09-20 Erwin Maier Mitre gauge
EP0332906A3 (en) * 1988-03-15 1991-02-06 Erwin Maier Mitre gauge

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