Illumination – Supported by vehicle structure – Condition responsive
Patent
1988-01-25
1989-05-09
Henry, Jon W.
Illumination
Supported by vehicle structure
Condition responsive
350577, 33277, 362187, 362188, G02B 2300, G02B 2720, F21K 100
Patent
active
048283770
ABSTRACT:
A sighting device for aiming an astronomical telescope. The sighting device comprises a tubular housing which is removably mountable in the eyepiece holder of the telescope. A light source is mounted within the tubular housing for projecting light into the eyepiece holder to thereby form a beam of light emergent from the front end of the telescope. This beam of light provides a visual indication of the direction in which the telescope is aimed, and the telescope may be aimed at a desired object or area by reference to the beam of light. After the telescope has been aimed, the sighting device is removed and replaced by a normal eyepiece.
REFERENCES:
patent: 1160615 (1915-11-01), Jacob
patent: 1346580 (1920-07-01), Wood
patent: 1517332 (1924-12-01), Wood
patent: 1526416 (1925-02-01), Frahz
patent: 1728993 (1929-09-01), Gerdes
patent: 2707423 (1955-05-01), Back
patent: 3286584 (1966-11-01), Hermann
patent: 4438567 (1984-03-01), Raiha
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