Display cabinet with stabilized rotating shelf mechanism

A display device comprising rotational drive motor means, at least a disc having circumferentially spaced openings drivingly coupled to the motor means, links corresponding in number to said disc openings and coupled with said openings, merchandise display shelves fixed to first terminals of said links adjacent to said disc openings, a circumferential connecting element common to all of said links and having circumferentially spaced openings corresponding in number and spacing to the disc openings, the openings of the circumferential connecting element being coupled with second terminals of the links, the circumferential connecting element being eccentrically located relative to the disc on one orthogonal axis, means engaging the circumferential connecting element and positively restraining it on a second orthogonal axis, and said disc spaced openings comprising slots opening through the periphery of the disc, and stationary means at diametrically opposite points on the disc preventing the escape of said links from said slots at three o'clock and nine o'clock positions.

An orbital drive mechanism comprising support means, a rotational drive motor mounted on the support means, a disc having circumferentially spaced openings drivingly coupled to said motor and being concentric with a drive shaft axis of the motor, a ring spaced axially of the disc and being eccentrically positioned relative thereto and having circumferentially spaced openings corresponding in number and spacing to the openings of the disc, crank links drivingly interconnecting the disc and ring whereby rotation of the disc causes the ring to follow in rotation while maintaining its eccentric relationship to the disc, opposite side locator members for the ring on said support means, circumferentially spaced members spaced from one side of said disc and having corresponding ends fixed to said crank links, and the spaced openings of said disc consisting of radial slots opening through the periphery of the disc, said locator members having opposing parallel grooves receiving peripheral edge portions of said ring, and opposing projecting flanges on said locator members having arcuate retainer edges preventing escape of said crank links from said disc radial slots when said slots are substantially at three o'clock or nine o'clock positions on said disc during rotation of the disc.

An orbital drive mechanism comprising rotational drive motor means, at least a disc having circumferentially spaced openings drivingly coupled to the motor means, links corresponding in number to said disc openings and coupled with said openings, orbital members fixed to first terminals of said links adjacent to said disc openings, a circumferential connecting element common to all of said links and having circumferentially spaced openings corresponding in number and spacing to the disc openings, the openings of the circumferential connecting element being coupled with second terminals of the links, the circumferential connecting element being eccentrically located relative to the disc on a first orthogonal axis, means engaging the circumferential connecting element and positively restraining it on a second orthogonal axis, and said disc spaced openings comprising slots opening through the periphery of the disc, and stationary means at diametrically opposite points on the disc preventing escape of said links from said slots at three o'clock and nine o'clock positions.