GB2250959B - Geometrical drawing instrument - Google Patents

Geometrical drawing instrument

Info

Publication number
GB2250959B
GB2250959B GB9027937A GB9027937A GB2250959B GB 2250959 B GB2250959 B GB 2250959B GB 9027937 A GB9027937 A GB 9027937A GB 9027937 A GB9027937 A GB 9027937A GB 2250959 B GB2250959 B GB 2250959B
Authority
GB
United Kingdom
Prior art keywords
drawing instrument
geometrical drawing
geometrical
instrument
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 - Lifetime
Application number
GB9027937A
Other versions
GB9027937D0 (en
GB2250959A (en
Inventor
Timothy Alfred Redding
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.)
Helix Ltd
Original Assignee
Helix Ltd
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 Helix Ltd filed Critical Helix Ltd
Priority to GB9027937A priority Critical patent/GB2250959B/en
Publication of GB9027937D0 publication Critical patent/GB9027937D0/en
Priority to GB9108704A priority patent/GB2249058B/en
Publication of GB2250959A publication Critical patent/GB2250959A/en
Application granted granted Critical
Publication of GB2250959B publication Critical patent/GB2250959B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G01B3/02—Rulers with scales or marks for direct reading
    • G01B3/04—Rulers with scales or marks for direct reading rigid
    • G01B3/06—Rulers with scales or marks for direct reading rigid folding
GB9027937A 1990-09-08 1990-12-21 Geometrical drawing instrument Expired - Lifetime GB2250959B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9027937A GB2250959B (en) 1990-12-21 1990-12-21 Geometrical drawing instrument
GB9108704A GB2249058B (en) 1990-09-08 1991-04-23 Improvements in or relating to mathematical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9027937A GB2250959B (en) 1990-12-21 1990-12-21 Geometrical drawing instrument

Publications (3)

Publication Number Publication Date
GB9027937D0 GB9027937D0 (en) 1991-02-13
GB2250959A GB2250959A (en) 1992-06-24
GB2250959B true GB2250959B (en) 1994-02-23

Family

ID=10687527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9027937A Expired - Lifetime GB2250959B (en) 1990-09-08 1990-12-21 Geometrical drawing instrument

Country Status (1)

Country Link
GB (1) GB2250959B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5509212A (en) * 1994-09-12 1996-04-23 Henricksen; Douglas A. Folding and locking drafting aid apparatus and method
DE19649035C2 (en) * 1996-01-20 2000-06-21 Werner Gumpert Foldable drawing and / or measuring ruler
CZ296691B6 (en) * 2003-10-13 2006-05-17 Metrie Spol. S R.O. Multifunction gauge, particularly for handicraft use
US7171757B1 (en) * 2005-04-21 2007-02-06 Learning Resources, Inc. Folding ruler
GB2443174A (en) * 2006-10-24 2008-04-30 Jeffrey Lee Ormandy Template device

Also Published As

Publication number Publication date
GB9027937D0 (en) 1991-02-13
GB2250959A (en) 1992-06-24

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20101220