Geometrical instruments – Straight-line light ray type – Celestial
Patent
1993-03-19
1993-12-14
Will, Thomas B.
Geometrical instruments
Straight-line light ray type
Celestial
33354, 33361, 368 15, 368 20, G01C 1734
Patent
active
052690652
ABSTRACT:
A compass wherein positional information regarding a predetermined terrestrial location is stored; present time, corresponding to the terrestrial location whose positional information is stored, is measured and displayed; and constellation data is stored. A geomagnetism-detector is provided for detecting the direction of geomagnetism and for deriving azimuthal data therefrom. A constellation data display device is provided for reading out stored constellation data in accordance with the derived azimuthal data, the stored positional information, and the measured present time, and for displaying the readout constellation data. Declination data representing magnetic declination regarding the predetermined terrestrial location may be stored, and the derived azimuthal data may be corrected in accordance with the declination data, to thereby obtain corrected azimuthal data which represents a geographical direction, which corrected azimuthal data is used by the constellation data display device in reading out and displaying the constellation data.
REFERENCES:
patent: 2432958 (1947-12-01), Wenzel
patent: 3169319 (1965-02-01), Hoffmeister
patent: 4024382 (1977-05-01), Fowler
patent: 4031630 (1977-06-01), Fowler
patent: 4055902 (1977-11-01), Jolley
patent: 4091543 (1978-05-01), Lapeyre
patent: 4336596 (1982-06-01), Martin
patent: 4470119 (1984-09-01), Hasebe et al.
patent: 4482255 (1984-11-01), Gygax et al.
patent: 4487511 (1984-12-01), Lucarelli
patent: 4668100 (1987-05-01), Murakami et al.
patent: 4694583 (1987-09-01), Blaney
patent: 4702011 (1987-10-01), Sigley
patent: 4726687 (1988-02-01), Gander
patent: 4731767 (1988-03-01), Uehara
patent: 4791729 (1988-12-01), Suda
patent: 4887081 (1989-12-01), Iihoshi et al.
patent: 5208790 (1993-05-01), Sato
Casio Computer Co. Ltd.
Will Thomas B.
LandOfFree
Compass including means for displaying constellation data does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compass including means for displaying constellation data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compass including means for displaying constellation data will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1695356