FR405252A - Improvements to portable magnetic compasses - Google Patents

Improvements to portable magnetic compasses

Info

Publication number
FR405252A
FR405252A FR405252A FR405252DA FR405252A FR 405252 A FR405252 A FR 405252A FR 405252 A FR405252 A FR 405252A FR 405252D A FR405252D A FR 405252DA FR 405252 A FR405252 A FR 405252A
Authority
FR
France
Prior art keywords
portable magnetic
magnetic compasses
compasses
portable
magnetic
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
FR405252A
Other languages
French (fr)
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.)
Kelvin & James White
Original Assignee
Kelvin & James White
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 Kelvin & James White filed Critical Kelvin & James White
Application granted granted Critical
Publication of FR405252A publication Critical patent/FR405252A/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)
FR405252A 1908-10-13 1909-07-20 Improvements to portable magnetic compasses Expired FR405252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB405252X 1908-10-13

Publications (1)

Publication Number Publication Date
FR405252A true FR405252A (en) 1909-12-24

Family

ID=1449748

Family Applications (1)

Application Number Title Priority Date Filing Date
FR405252A Expired FR405252A (en) 1908-10-13 1909-07-20 Improvements to portable magnetic compasses

Country Status (1)

Country Link
FR (1) FR405252A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738591A (en) * 1952-11-07 1956-03-20 Nye S Spencer Ship's magnetic compass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738591A (en) * 1952-11-07 1956-03-20 Nye S Spencer Ship's magnetic compass

Similar Documents

Publication Publication Date Title
FR385906A (en) Improvements to screws
FR405252A (en) Improvements to portable magnetic compasses
FR388267A (en) Improvements to helico-centrifugal pumps
FR394356A (en) Improvements to registers
FR397433A (en) Improvements to phonographs
FR397532A (en) Improvements to torpedoes
FR394420A (en) Improvements to electric clocks
FR393056A (en) Improvements to portable ovens
FR392599A (en) Improvements made to tarares
FR11932E (en) Improvements to registers
FR401832A (en) Improvements to ships
FR391801A (en) Improvements to perforators
FR395938A (en) Improvements to the rules
FR390699A (en) Improvements to taximeters
FR386217A (en) Improvements to taximeters
FR394908A (en) Improvements to proportional dividers
FR395840A (en) Improvements to airplanes
FR396357A (en) Improvements to crutches
FR388619A (en) Compass watch
FR10630E (en) Compass watch
CH44234A (en) Needle compass
FR11408E (en) Improvements to sundials
FR392196A (en) Improvements to torpedoes
FR404263A (en) Improvements to range finders
FR393783A (en) Improvements to music recorders and replayers