GB493717A - Improvements in compass cards - Google Patents

Improvements in compass cards

Info

Publication number
GB493717A
GB493717A GB1056737A GB1056737A GB493717A GB 493717 A GB493717 A GB 493717A GB 1056737 A GB1056737 A GB 1056737A GB 1056737 A GB1056737 A GB 1056737A GB 493717 A GB493717 A GB 493717A
Authority
GB
United Kingdom
Prior art keywords
pivot
lubricant
pivot cap
cap
compass cards
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
GB1056737A
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 GB1056737A priority Critical patent/GB493717A/en
Publication of GB493717A publication Critical patent/GB493717A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Abstract

493,717. Magnetic compasses. GILLIE, J. W. April 14, 1937, No. 10567. Drawings to Specification. [Class 97 (ii)] Dry compass cards are damped by applying to the pivot a portion of lubricant of such viscosity as to remain in position in the pivot cap. The pivot cap may be provided just below the jewel with a small recess to retain the lubricant. An aluminium rim, carrying an annular paper index, may be attached to the pivot cap by silk threads and may carry hollow steel magnets.
GB1056737A 1937-04-14 1937-04-14 Improvements in compass cards Expired GB493717A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1056737A GB493717A (en) 1937-04-14 1937-04-14 Improvements in compass cards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1056737A GB493717A (en) 1937-04-14 1937-04-14 Improvements in compass cards

Publications (1)

Publication Number Publication Date
GB493717A true GB493717A (en) 1938-10-13

Family

ID=9970225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1056737A Expired GB493717A (en) 1937-04-14 1937-04-14 Improvements in compass cards

Country Status (1)

Country Link
GB (1) GB493717A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5079846A (en) * 1989-05-08 1992-01-14 The Brunton Company Floating disk compass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5079846A (en) * 1989-05-08 1992-01-14 The Brunton Company Floating disk compass

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