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US 6,578,277 B1Granted
Magnetic compass
OwnerGin-Sung Changinventor
Life of this patent
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Abstract
A magnetic compass comprises a compass body, an illuminant, a battery set, a base, and a top lid. The compass body, the illuminant and the battery set are situated within the interior section of the base and, furthermore, the illuminant is positioned at one side of the compass body and its light is projected towards the peripheral walls of the compass body. As such, the compass body is illuminated at optimal efficiency and the magnetic compass of the present invention is effectively usable under low light conditions.
Claims11
A magnetic compass comprising:
- a compass body having a transparent housing, magnetic needle installed inside said housing and a compass rose fixed to a bottom plate the transparent housing;
- an illuminant;
- a battery set connected electrically to said illuminant;
- a base having:
- a base body provided in the interior thereof with a recessed space receiving said compass body, a tubular partition plate forming a battery compartment on a periphery of said recessed space receiving said battery set, and an illumination component chamber communicated with said recessed space receiving said illuminant formed on said partition plate, said chamber and illuminant being spaced above the compass rose such that emitted light of said illuminant is projected towards the peripheral walls of the compass body and over the compass rose;
- an opening formed at the top section of the base body and communicated with said recessed space admitting said the compass body;
- a cover fixed over said opening of the base body, said cover is provided with a readout window and a push button hole corresponding in location to said compass body and said battery set;
- a push button positioned in said battery compartment and a top portion thereof, protruding through the push button hole of the cover, thereby pressing the push button establishes continuity between the battery set and the illuminant, enabling electrical current from the battery set to be supplied to the illuminant;
- a top lid pivoted to one end of said base and adapted to cover the top surface of said base, said top lid is provided with a built-in magnifying glass.
6 more elements
Dependencies are inferred from the claim text.