CA2470749A1 - Magnetic compass - Google Patents

Magnetic compass Download PDF

Info

Publication number
CA2470749A1
CA2470749A1 CA 2470749 CA2470749A CA2470749A1 CA 2470749 A1 CA2470749 A1 CA 2470749A1 CA 2470749 CA2470749 CA 2470749 CA 2470749 A CA2470749 A CA 2470749A CA 2470749 A1 CA2470749 A1 CA 2470749A1
Authority
CA
Canada
Prior art keywords
illuminant
terminal
chamber
receiving
battery
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.)
Granted
Application number
CA 2470749
Other languages
French (fr)
Other versions
CA2470749C (en
Inventor
Gin-Sung Chang
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 CA002470749A priority Critical patent/CA2470749C/en
Publication of CA2470749A1 publication Critical patent/CA2470749A1/en
Application granted granted Critical
Publication of CA2470749C publication Critical patent/CA2470749C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01C17/20—Observing the compass card or needle
    • G01C17/24—Illumination

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

A magnetic compass includes a base having a receiving chamber for receiving a compass body, a battery chamber for receiving a battery set, an illuminant chamber for receiving an illuminant, and a locating chamber for receiving an electrically conductive member. The illuminant has a first terminal suspended above the battery set. A push button is supported on the first terminal of the illuminant for pressing by the user to force the first terminal of the illuminant downwards into contact with a first terminal of the battery set. The conductive member has a base frame mounted in the locating chamber, and a contact portion extended from the base frame and inserted into the battery chamber and pressed on a second terminal of the battery set. A second terminal of the illuminant is electrically connected to the base frame of the conductive member.
CA002470749A 2004-06-10 2004-06-10 Magnetic compass Expired - Fee Related CA2470749C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002470749A CA2470749C (en) 2004-06-10 2004-06-10 Magnetic compass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002470749A CA2470749C (en) 2004-06-10 2004-06-10 Magnetic compass

Publications (2)

Publication Number Publication Date
CA2470749A1 true CA2470749A1 (en) 2005-12-10
CA2470749C CA2470749C (en) 2009-03-31

Family

ID=35478518

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002470749A Expired - Fee Related CA2470749C (en) 2004-06-10 2004-06-10 Magnetic compass

Country Status (1)

Country Link
CA (1) CA2470749C (en)

Also Published As

Publication number Publication date
CA2470749C (en) 2009-03-31

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20150610

MKLA Lapsed

Effective date: 20150610