CA2402164A1 - Combination compass - Google Patents

Combination compass Download PDF

Info

Publication number
CA2402164A1
CA2402164A1 CA 2402164 CA2402164A CA2402164A1 CA 2402164 A1 CA2402164 A1 CA 2402164A1 CA 2402164 CA2402164 CA 2402164 CA 2402164 A CA2402164 A CA 2402164A CA 2402164 A1 CA2402164 A1 CA 2402164A1
Authority
CA
Canada
Prior art keywords
compass
mouthpiece
housing
top cover
air passage
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 2402164
Other languages
French (fr)
Other versions
CA2402164C (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 CA002402164A priority Critical patent/CA2402164C/en
Publication of CA2402164A1 publication Critical patent/CA2402164A1/en
Application granted granted Critical
Publication of CA2402164C publication Critical patent/CA2402164C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K5/00—Whistles
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Lenses (AREA)

Abstract

A combination compass is constructed to include a housing, a compass device mounted inside the housing, a top cover pivoted to one end of the housing and being capable of covering over the compass device. The top cover has a mouthpiece, a resonance chamber, an air passage connected between the mouthpiece and the resonance chamber, and a sound producing device disposed in the air passage and adapted to produce sound when the user blowing air into the mouthpiece with the mouth.
CA002402164A 2002-09-10 2002-09-10 Combination compass Expired - Fee Related CA2402164C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002402164A CA2402164C (en) 2002-09-10 2002-09-10 Combination compass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002402164A CA2402164C (en) 2002-09-10 2002-09-10 Combination compass

Publications (2)

Publication Number Publication Date
CA2402164A1 true CA2402164A1 (en) 2004-03-10
CA2402164C CA2402164C (en) 2007-02-13

Family

ID=32046543

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002402164A Expired - Fee Related CA2402164C (en) 2002-09-10 2002-09-10 Combination compass

Country Status (1)

Country Link
CA (1) CA2402164C (en)

Also Published As

Publication number Publication date
CA2402164C (en) 2007-02-13

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20100910