GB493588A - Improvements in plotting instruments for the use of surveyors, draughtsmen and others - Google Patents

Improvements in plotting instruments for the use of surveyors, draughtsmen and others

Info

Publication number
GB493588A
GB493588A GB572/38A GB57238A GB493588A GB 493588 A GB493588 A GB 493588A GB 572/38 A GB572/38 A GB 572/38A GB 57238 A GB57238 A GB 57238A GB 493588 A GB493588 A GB 493588A
Authority
GB
United Kingdom
Prior art keywords
scales
plotting
draughtsmen
surveyors
edge
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
GB572/38A
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.)
GANEGODAGE MARTIN PERERA AMARA
Original Assignee
GANEGODAGE MARTIN PERERA AMARA
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 GANEGODAGE MARTIN PERERA AMARA filed Critical GANEGODAGE MARTIN PERERA AMARA
Publication of GB493588A publication Critical patent/GB493588A/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
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/10—Comparing observed direction with north indication
    • G01C17/12—Comparing observed direction with north indication by sighting means, e.g. for surveyors' compasses

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

493,588. Plotting-scales. AMARASEKERA, G. M. P. Jan. 7, 1938, No. 572. Convention date, Jan. 7, 1937. [Class 97 (iii)] A cursor 18 slides between straight edges 11 which are spaced apart by end pieces 12, scales are provided on a straight edge 11 and on an edge of the cursor 18 perpendicular to the straight edge 11, and a pointer 17 is provided on an end piece 12 with its tip at the intersection of the perpendiculars through the zeros on the two scales. Scales may be provided on both straight edges and pointers 17 on both end pieces 12. The instrument facilitates plotting points offset from a base line. Specificaton 19216/91, [Class 97], is' referred to.
GB572/38A 1937-01-07 1938-01-07 Improvements in plotting instruments for the use of surveyors, draughtsmen and others Expired GB493588A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LK493588X 1937-01-07

Publications (1)

Publication Number Publication Date
GB493588A true GB493588A (en) 1938-10-11

Family

ID=19721009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB572/38A Expired GB493588A (en) 1937-01-07 1938-01-07 Improvements in plotting instruments for the use of surveyors, draughtsmen and others

Country Status (1)

Country Link
GB (1) GB493588A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660295A (en) * 1985-05-13 1987-04-28 Albert Emrich Metric measuring device for postage stamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660295A (en) * 1985-05-13 1987-04-28 Albert Emrich Metric measuring device for postage stamps

Similar Documents

Publication Publication Date Title
GB493588A (en) Improvements in plotting instruments for the use of surveyors, draughtsmen and others
GB599260A (en) An instrument for aiding navigation
GB504651A (en) Improvements in or relating to instruments for indicating bearings on maps
GB674961A (en) Improvements in or relating to measuring instruments and the like
GB462346A (en) Instrument for use in navigation
GB510220A (en) Combined protractor and calculating device for use in navigational problems
GB561817A (en) Improvements in compasses and the like
GB600778A (en) Improvements in or relating to measuring or calculating instruments
GB888698A (en) Improvements in or relating to electrical indicating units
GB489501A (en) Improvements in or relating to calculating slide rules
GB504862A (en) Improvements in calendars
GB548317A (en) Improvements in length measuring instruments
GB581787A (en) Improvements in combination mathematical instruments
GB721444A (en) Improvements in or relating to measuring devices for engine indicator diagrams
GB485097A (en) Draughtsman's combination drawing board, tee-square and set-square
GB365891A (en) Improvements in desk implements
GB584532A (en) Improvements in instruments for calculating variations in the altitude of the sun
GB559636A (en) Improvements in or relating to measuring scales
GB470714A (en) A new or improved goniometer
GB494997A (en) Improvements in nautical course correctors
ES88557U (en) Drawing instrument (Machine-translation by Google Translate, not legally binding)
GB607187A (en) Instrument capable of ascertaining the angle of an inclined surface and the length of such surface and for delineating angles
GB707427A (en) Improvements in or relating to micrometers
GB326720A (en) An improved navigational plotting instrument
GB492184A (en) Improvements in and relating to gyroscopic navigation instruments