Elevating apparatus for visual displays

An elevating apparatus for visible displays which is movable in height through the action of a motor, so as to elevate the display to a desired height for its use, as well as to lower the same to a position where the display may be concealed when not in use, the improvement comprising:

• a) a base;
• b) a motor mounted on the base,
• c) an elongate horizontal drive coupled to the motor for rotating the drive about its long axis;
• d) a pair of spaced-apart elongate vertical threaded rods upstanding from the base;
• e) gear means operatively coupling the horizontal drive to each of the threaded rods to rotate them in synchrony;
• f) a threaded nut mounted on each threaded rod;
• g) a vertical smooth rod adjacent each threaded rod;
• h) an elongate slide bushing mounted on each smooth rod for sliding motion thereon;
• i) each threaded nut attached to the elongate slide bushing adjacent thereto for causing the slide bushings to raise and lower at the same rate as the threaded nuts as the threaded rods are rotated in one direction or the other by the motor action;
• and
• j) a horizontal display-supporting platform having a front side and a rear side, the platform connected to the slide bushings on the rear side thereof so that the platform is raised and lowered by the motor action at the same rate as the slide bushings, the rods and bushings all being behind the platform on the rear side thereof to minimize the width of the apparatus.

An elevating apparatus for visible displays which is movable in height through the action of a motor, so as to elevate the display to a desired height for its use, as well as to lower the same to a position where the display may be concealed when not in use, the improvement comprising:

• a) a base;
• b) a motor mounted on the base;
• c) an elongate horizontal drive coupled to the motor for rotating the drive about its long axis;
• d) a pair of spaced-apart elongate vertical threaded rods upstanding from the base;
• e) gear means operatively coupling the horizontal drive to each of the threaded rods to rotate them in synchrony;
• f) a threaded nut mounted on each threaded rod;
• g) a vertical smooth rod adjacent each threaded rod;
• h) an elongate slide bushing mounted on each smooth rod for sliding motion thereon;
• i) each threaded nut connected to the elongate slide bushing adjacent thereto for causing the slide bushings to raise and lower as the threaded rods are rotated in one direction or the other by the motor action;
• j) a vertical bar attached to each slide bushing;
• k) a vertical support rod attached to each bar;
• l) a support bushing slidably mounted on each support rod;
• m) a sprocket rotatably mounted on a horizontal axle attached to each bar at an upper end thereof;
• n) a chain having a first end attached to the base, a second end attached to the support bushing and the chain engaging the sprocket therebetween to cause the support bushing to move at the rate of the threaded bushing plus the rate of the sprocket;
• o) a horizontal display-supporting platform having a front side and a rear side, the platform attached to the support bushings on a rear side thereof, whereby the platform rises at a greater rate than each slide bushing and extends to a greater elevation than the threaded rods, the rods and bushings all being behind the platform on the rear side thereof to minimize the width of the apparatus.