Ships – Building – Canal and ferry boats
Patent
1987-12-08
1989-06-20
Bovernick, Rodney B.
Ships
Building
Canal and ferry boats
350321, 350239, 114 66, G02B 2700
Patent
active
048404586
ABSTRACT:
A split-sphere observatory enclosure wherein the antrum segment is capped with a shutter lid. The rotor which is the active shutter segment sweeps through an elongate curved aperture in the shutter lid to reveal the oculus. The oculus may be completely covered by the shutter lid or completely exposed at any elevation between the horizontal and vertical or zenith positions. The weather resistance of the enclosure is enhanced through the provision of continuous seals between the segments.
REFERENCES:
patent: 4186532 (1980-02-01), Kahn
Letter to Gerald M. Smith from Ethan Wilson Cliffton, Apr. 9, 1986.
Letter to Robert P. Kraft, Ph.D. from Ethan Wilson Cliffton, Apr. 10, 1986.
Letter to Peter Lissamen, Ph.D. from Ethan Wilson Cliffton, Jul. 17, 1986.
Letter to David Halliday from Ethan Wilson Clifton, Aug. 7, 1986.
Handwritten memorandum summarizes a conversation between applicant and Dr. Lissamen, Sep. 11, 1986.
Letter to Peter Lissamen, Ph.D. from Ethan Wilson Cliffton Jan. 6, 1987.
Letter to Ethan Wilson Cliffton from P.B.S. Lissamen, Jan. 29, 1987.
Ethan Wilson Cliffton, "A Vestibulo-Ocular Dome", Feb. 5, 1987.
Ben Loha
Bovernick Rodney B.
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