Horizontally supported planar surfaces – Power driven
Patent
1979-02-26
1980-10-07
Frazier, Roy D.
Horizontally supported planar surfaces
Power driven
33 1M, 248430, 248651, A47B 8500
Patent
active
042261910
ABSTRACT:
A remotely controlled tri-level roller platform assembly including a base portion, an intermediate portion and a top support portion. The intermediate portion is reciprocally operable in a first linear plane, atop and independently of the base member, by means of a first reversible electric motor, with the top support portion disposed thereatop for movement therewith. The top support portion is reciprocally operable in a second linear plane, independent of the intermediate portion, at right angles to the first plane, by means of a second reversible electric motor. Remote control electric switches are provided for the first and second motors whereby the motors may be selectively operated for universal planar positioning of any desired point within a predetermined area of the top surface of the top support portion relative to the lens of a single camera in a visual aid system, including a TV monitor.
REFERENCES:
patent: D241981 (1976-10-01), Miller
patent: 2412017 (1946-12-01), Taylor et al.
patent: 2933022 (1960-04-01), Stark
patent: 3495519 (1970-02-01), Alfsen et al.
patent: 3897659 (1975-08-01), Henry
patent: 3918167 (1975-11-01), Gerber
patent: 4113223 (1978-09-01), Kakizaki
Aschenbrenner Peter A.
Frazier Roy D.
Sparks Meredith P.
University of Miami
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