GB1528473A - Drawing instruments - Google Patents

Drawing instruments

Info

Publication number
GB1528473A
GB1528473A GB4001775A GB4001775A GB1528473A GB 1528473 A GB1528473 A GB 1528473A GB 4001775 A GB4001775 A GB 4001775A GB 4001775 A GB4001775 A GB 4001775A GB 1528473 A GB1528473 A GB 1528473A
Authority
GB
United Kingdom
Prior art keywords
slot
sept
straight edge
protractor
drawing instruments
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
GB4001775A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB4001775A priority Critical patent/GB1528473A/en
Publication of GB1528473A publication Critical patent/GB1528473A/en
Priority to HK37379A priority patent/HK37379A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01B3/563—Protractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00—Straightedges
    • B43L7/027—Plural non-adjustable straightedges fixed at right angles
    • B43L7/0275—Triangles

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Drawing Aids And Blackboards (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

1528473 Protractors H A WING-KWAN 21 Sept 1976 [30 Sept 1975] 40017/75 Heading G1X A transparent substantially triangular drawing instrument comprises protractor markings 18 around an arcuate slot 20, and a slot 14 with a straight edge, the centre point 16 of the protractor lying on the straight edge of the slot.
GB4001775A 1975-09-30 1975-09-30 Drawing instruments Expired GB1528473A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4001775A GB1528473A (en) 1975-09-30 1975-09-30 Drawing instruments
HK37379A HK37379A (en) 1975-09-30 1979-06-14 Improvements in or relating to drawing instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4001775A GB1528473A (en) 1975-09-30 1975-09-30 Drawing instruments

Publications (1)

Publication Number Publication Date
GB1528473A true GB1528473A (en) 1978-10-11

Family

ID=10412754

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4001775A Expired GB1528473A (en) 1975-09-30 1975-09-30 Drawing instruments

Country Status (2)

Country Link
GB (1) GB1528473A (en)
HK (1) HK37379A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103568664A (en) * 2013-11-15 2014-02-12 南丹县大厂镇中心小学 Three-ply teaching aid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103568664A (en) * 2013-11-15 2014-02-12 南丹县大厂镇中心小学 Three-ply teaching aid

Also Published As

Publication number Publication date
HK37379A (en) 1979-06-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee