Geometrical instruments – Straight-line light ray type – With magnetic compass
Patent
1977-12-02
1983-09-06
Stearns, Richard R.
Geometrical instruments
Straight-line light ray type
With magnetic compass
33334, 33348, 33364, G01C 1718, G01C 1724
Patent
active
044021402
ABSTRACT:
Disclosed is a structure of a telescope with compass which indicates the direction in which the telescope is pointed, at the periphery of the field of vision of the telescope. Referring to the compass used for the telescope: a magnet is provided in a compass direction indicating globe on whose outer circumference directions are indicated. This direction indicating globe is supported so as to float in a case containing a lubricating liquid such as oil, etc. This compass is attached to the body of the telescope (specifically, a pair of hand-held binoculars, etc.). Then, the compass direction indication of the direction indicating globe appears as an image at the same focal point as the focal point of the objective lens of the telescope. Referring to other forms of telescopes: the direction indication is especially applicable to a telescope attached to a stand. A gyrocompass fixed to the arms supporting the body tube is connected to a luminous diode or crystalline liquid indication means, etc. attached inside the body tube of the telescope by a conductor. The gyrocompass, because it is fixed to the arms, pivots with the body tube of the telescope. A signal of the gyrocompass which detects the direction in which the telescope is pointed, is indicated at the luminous diode indication means, etc. in the body tube through the conductor. Finally, this direction indication is perceived by the viewer through the ocular at the periphery of the field of vision of the telescope.
REFERENCES:
patent: Re26109 (1966-11-01), Brown
patent: 2792742 (1957-05-01), Scott et al.
patent: 2941307 (1960-06-01), Frisbie
patent: 3128562 (1964-04-01), Yusa
patent: 3417474 (1968-12-01), Evans et al.
patent: 3448623 (1969-06-01), Fischer
patent: 4020559 (1977-05-01), Sherman
Creighton Wray James
Stearns Richard R.
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