BS 1685:2008
Current
The latest, up-to-date edition.
Bevel protractors (mechanical and optical). Requirements and test methods
Hardcopy , PDF
English
31-08-2009
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Foreword
1 Scope
2 Nomenclature
3 Normative references
4 Material
5 General design and workmanship
6 Body
7 Stock
8 Blade
9 Acute angle attachment
10 Graduations
11 Marking
12 Case
Explains the following types of bevel protractors: a) Mechanical - (i) Type A - With vernier graduated to read to five minutes of arc, and with slow motion device, and acute angle attachment. (ii) Type B - With vernier graduated to read to five minutes of arc, but without slow motion device or acute angle attachment. (iii) Type C - With scale graduated in degrees, without vernier or slow motion device or acute angle attachment. b) Optical - With an internal circular scale which is graduated in divisions of 10 minutes of arc and read against a fixed index line or vernier by means of an optical magnifying system integral with the instrument, enabling readings to be taken, by estimation or otherwise, to approximately two minutes of arc.
| Committee |
TPR/1
|
| DevelopmentNote |
Supersedes BS 1685(1951) & 08/30177880 DC. (11/2008)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This standard relates to the following types of bevel protractors: Mechanical. Type A. With vernier graduated to read to five minutes of arc, and with slow motion device, and acute angle attachment. Type B. With vernier graduated to read to five minutes of arc, but without slow motion device or acute angle attachment. Type C. With scale graduated in degrees, without vernier or slow motion device or acute angle attachment. Optical. With an internal circular scale which is graduated in divisions of 10 minutes of arc1) and read against a fixed index line or vernier by means of an optical magnifying system integral with the instrument, enabling readings to be taken, by estimation or otherwise, to approximately two minutes of arc.
| BS EN 12540:2000 | Corrosion protection of metals. Electrodeposited coatings of nickel, nickel plus chromium, copper plus nickel and copper plus nickel plus chromium |
| BS EN ISO 18265:2013 | Metallic materials. Conversion of hardness values |
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