Collapsible binocular telescope with adjustable internal focusin

Details Collapsible binocular telescope with adjustable internal focusin Collapsible binocular telescope with adjustable internal focusin

1977-04-01

1978-03-21

Henry, Jon W.

350 47, 350 76, G02B 2300, G02B 706

Patent

active

040800423

ABSTRACT:
The invention contemplates an improved binocular telescope construction of the variety wherein a bridge provides articulated connection of the two telescope systems, so that by folding at least one of these articulated systems back against a side of the bridge, the instrument may be compacted when not in use. The invention is particularly concerned with provision of a single focusing drive for the focusing optical elements of both telescope systems, the drive being operative regardless of the extent of articulated expansion or contraction of the bridge-connected systems. The invention also features provision of such focusing by movement of optical elements contained within the overall telescope-housing length, so that such length does not change in the course of focusing. Various embodiments are described.

REFERENCES:
patent: 1338241 (1920-04-01), Meling's
patent: 1428478 (1922-09-01), Dunne
patent: 2811895 (1957-11-01), Jensen
patent: 3484149 (1969-12-01), Becker et al.

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