GB1296886A - - Google Patents

Info

Publication number
GB1296886A
GB1296886A GB1296886DA GB1296886A GB 1296886 A GB1296886 A GB 1296886A GB 1296886D A GB1296886D A GB 1296886DA GB 1296886 A GB1296886 A GB 1296886A
Authority
GB
United Kingdom
Prior art keywords
ruler
trapezium
march
barros
protractors
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
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 filed Critical
Publication of GB1296886A publication Critical patent/GB1296886A/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
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/20—Instruments for performing navigational calculations

Landscapes

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

Abstract

1296886 Protractors; rulers F DE BARROS 12 March 1970 [13 March 1969] 11866/70 Headings G1M and G1X A measuring device comprises a flat, transparent isosceles trapezium 1 provided with two protractor scales 2, 3, and a ruler 6 attached to the base of the trapezium by a parallel linkage 7. The device which may be of polystyrene may be provided with equidistantly spaced parallel lines 5, 8 marked on the trapezium 1 and ruler 6, the ruler 6 being graduated in units of length. (For figure see next page)
GB1296886D 1969-03-13 1970-03-12 Expired GB1296886A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT5134169 1969-03-13

Publications (1)

Publication Number Publication Date
GB1296886A true GB1296886A (en) 1972-11-22

Family

ID=20081689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296886D Expired GB1296886A (en) 1969-03-13 1970-03-12

Country Status (7)

Country Link
BE (1) BE747359A (en)
CH (1) CH516788A (en)
DE (1) DE2011821B2 (en)
DK (1) DK130371B (en)
FR (1) FR2038929A5 (en)
GB (1) GB1296886A (en)
NL (1) NL7003581A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191290A (en) * 1986-06-06 1987-12-09 Iain Macleod Depth gauge
GB2191593A (en) * 1986-06-13 1987-12-16 Liu Bao Shen Angle measuring instrument
GB2192286A (en) * 1986-06-27 1988-01-06 Smiths Industries Plc Parallel protractor rule
GB2240405A (en) * 1990-01-26 1991-07-31 Forshaw Whittaker Christopher Ophthalmic measures and templates
GB2291717A (en) * 1994-07-15 1996-01-31 John Mary Patrick Broderick Device for measuring and indicating angles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105620126B (en) * 2016-02-22 2017-10-31 桂林航天工业学院 A kind of quick and precisely multipurpose plotter
CN113561683B (en) * 2021-08-27 2022-02-22 中国人民解放军军事科学院国防科技创新研究院 Navigation plotting device and using method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191290A (en) * 1986-06-06 1987-12-09 Iain Macleod Depth gauge
GB2191593A (en) * 1986-06-13 1987-12-16 Liu Bao Shen Angle measuring instrument
GB2191593B (en) * 1986-06-13 1990-04-25 Liu Bao Shen Angle measuring instrument
GB2192286A (en) * 1986-06-27 1988-01-06 Smiths Industries Plc Parallel protractor rule
GB2240405A (en) * 1990-01-26 1991-07-31 Forshaw Whittaker Christopher Ophthalmic measures and templates
GB2240405B (en) * 1990-01-26 1994-09-28 Forshaw Whittaker Christopher Ophthalmic measures and templates
GB2291717A (en) * 1994-07-15 1996-01-31 John Mary Patrick Broderick Device for measuring and indicating angles

Also Published As

Publication number Publication date
CH516788A (en) 1971-12-15
DE2011821A1 (en) 1970-10-08
DE2011821C3 (en) 1974-05-30
DK130371B (en) 1975-02-10
NL7003581A (en) 1970-09-15
DE2011821B2 (en) 1973-10-31
DK130371C (en) 1975-07-07
FR2038929A5 (en) 1971-01-08
BE747359A (en) 1970-08-17

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees