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US 6,926,198 B2Granted
Wheel calculator
OwnerRonald Bromberg, Anthony Wilsoninventors
Life of this patent
Estimating the term…
Abstract
A wheel chart having at least one rigid disk formed by a compact disk which, in addition to having a mirrored or reflective layer capable of carrying reproducible information, has legible matter on an obverse side which cooperates with a member such as a transparent rigid disk which can also bear indicia to enable calculations to be made by relative rotation of the disks.
Claims3
A wheel chart comprising:
- a first rigid disk-shaped member having a hub portion and an obverse surface provided with legible matter extending around at least part of said hub portion;
- a second rigid disk-shaped member having a hub portion aligned with the hub portion of said first rigid disk-shaped member, said second rigid disk-shaped member being transparent over at least part of an area positionable over said legible matter and permitting said legible matter to be viewed through said second rigid disk-shaped member, said second rigid disk-shaped member having legible matter correlating with the legible matter of said first rigid disk-shaped member to provide information as to the correlation to a wheel-chart user, at least one of said rigid disk-shaped members being a compact disk having a metallized region extending over at least part of an area thereof between said hub portion and an outer periphery of the disk;
- and
- an element rotatably connecting said hub portions for relative rotation of said members and selection of said information by said relative rotation.
1 more element
Dependencies are inferred from the claim text.