Multiple function image switching attachment for a telescope or similar article

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Description

FIG. 1 is a top plan view of a multiple function image switching attachment for a telescope or similar article showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof; and

FIG. 6 is a cross-sectional view thereof, taken along line 6--6 of FIG. 2.

Referenced Cited
U.S. Patent Documents
D141692 June 1945 Nemeth
D253476 November 20, 1979 Schneck et al.
D268768 April 26, 1983 Melsheimer et al.
D272915 March 6, 1984 Feinbloom et al.
D275496 September 11, 1984 Condon
D276623 December 4, 1984 Feinbloom
D295871 May 24, 1988 Charles
2428719 October 1947 Nemeth
2753760 July 1956 Braymer
2948189 August 1961 Fischer
3074315 January 1963 Seibel et al.
3468597 September 1969 Jones
3645602 February 1972 Clave et al.
3871741 March 1975 Clave et al.
4143938 March 13, 1979 Feinbloom
4448500 May 15, 1984 Marling
4682091 July 21, 1987 Krewalk et al.
Other references
  • Sky and Telescope Magazine, Feb. 1983, bottom of p. 106, diagonal prism attachment on Questar telescope. Clave Photo-Visual Optical Device. Sky and Telescope Magazine, Oct. 1985, back cover, diagonal micron attachment on Celestron telescope.
Patent History
Patent number: D310381
Type: Grant
Filed: May 8, 1989
Date of Patent: Sep 4, 1990
Inventor: Jeffrey R. Charles (Sun City, AZ)
Primary Examiner: A. Hugo Word
Assistant Examiner: Doris V. Coles
Application Number: 7/348,650