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

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