Abstract: A drive mechanism for a spiral array of individual film photographs comprising a rotary driving plate having a spiral array of switch operating portions adapted to energize a driving motor for driving the driving plate; rotary axis means coupled to said driving plate; a photographic mount coupled to said rotary axis means and carrying a spiral array of individual photographs. A rectilinear bearing means on said frame adapted to guide said rotary axis means and said rotary driving plate together with said photographic mount in a rectilinear path laterally of the rotary axis of said rotary axis means, and mounting means carrying a track follower adapted to operate said switch and engagable with said switch operating portions. The track follower engaging a spiral track means on the rotary driving plate and serving to index said plate relative to said swith operating portions and also to activate said rotary driving plates in a direction along said rectilinear bearing means.
Abstract: 6. In combination in a system for reproducing .Iadd.video .Iaddend.information from a rotatable medium where the medium has characteristics at progressive positions along a spiral path for modifying energy directed at the medium in representation of .Iadd.video .Iaddend.information previously recorded on the medium where the information recorded on the medium at each successive position along the spiral path represents substantially less than a complete visual image,means operatively coupled to the medium for producing a continuous rotation of the medium,pickup means disposed relative to the medium including,means for directing .[.energy.]. .Iadd.a beam of energy having a radius not greater than approximately one micron to enable the reproduction of the video information .Iaddend.
May 15, 1979
Date of Patent:
June 15, 1982
Minnesota Mining and Manufacturing Company
Dean L. De Moss, David P. Gregg, Wayne R. Johnson