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US 4,376,346 AGranted
Perpetual calendar
OwnerMilton T. Nelsoninventor
Life of this patent
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OwnerMilton T. Nelsoninventor
Estimating the term…
First and second superposed members are mounted for relative back and forth movement along a predetermined path and one of the members has a generally rectangular window formed therein. The other of the members includes number indicia arranged in seriatim repetitively in coordinates of seven extending along the path with the coordinates spaced transversely of the path. The window is of a dimension transverse to the path to view the six laterally spaced coordinates of indicia therethrough and of a dimension longitudinally of the path to view seven indicia in each coordinate. A view masking panel is disposed intermediate the first and second members and includes a pair of elongated side-by-side indicia masking zones thereof extending along the path and including one pair of corresponding ends facing in one direction along the path and staggered lengthwise relative to the path a distance equivalent to at least seven of the indicia spaces. The view masking panel is shiftable along the path relative to the first and second members and may be utilized to selectively mask portions of two of the coordinates of indicia spaces extending along one side of the aforementioned path.
A perpetual calendar including first and second superposed panel member portions mounted for relative back and forth movement along a predetermined path, one of said panel member portions having a generally rectangular window formed therein, the other of said panel member portions including number indicia arranged thereon in seriatim repetitively in coordinates of seven extending along said path and including rows of indicia spaced transversely of said path, said window being of a dimension transverse to said path to view six laterally spaced rows of spaces therethrough and of a dimension longitudinally of said path to view seven indicia spaces in each row, and a single view masking panel member portion disposed intermediate said first and second panel member portions and including a pair of elongated side-by-side indicia space masking strip portions extending along said path and including one pair of corresponding ends facing in one direction along said path and staggered lengthwise of the latter a distance equivalent to at least seven of said indicia spaces, said view masking strip portions being manually shiftable along said path to selectively mask the two rows of spaces adjacent one longitudinal side of said window.
A perpetual calendar including an upstanding cylindrical body, a first generally cylindrical and upwardly opening cup member rotatably and snugly telescopingly received in the upper end of said body and including an upper end outwardly projecting flange downwardly abutted against an upwardly facing peripherally extending surface defined by said cylindrical body, a second upwardly opening and generally cylindrical cup member rotatably and snugly telescopingly received in the lower end of said body and including a lower end outwardly projecting flange upwardly abutted against a downwardly facing peripherally extending surface defined by said body, spring means operatively associated with and yieldingly resisting upward and downward displacement of said first and second cup members, respectively, relative to said body, said body and cup members including coacting detent means operative to releasably lock said cup members in predetermined rotated positions relative to said body and to allow selective rotation of said cup members relative to said body upon upward and downward displacement of said first and second cup members, respectively, relative to said body, said body having a small area month indicating viewing window formed therein and a large viewing window formed therein, said upper cut members including month indicating indicia formed thereon and spaced thereabout selectively registrable with said small month indicating viewing window, said lower cup member including number indicia arranged thereon in seriatim repetitively in coordinates of seven extending about said cup member and including vertically spaced rows of indicia, said large viewing window being of a vertical dimension to view six vertically spaced rows of spaces therethrough and of an angular dimension to view seven indicia spaces in each row.
A perpetual calendar including first and second relatively telescopingly and rotatably engaged generally cylindrical members mounted for angular oscillation relative to each other, the outer cylindrical member having a generally rectangular window formed therein, the inner cylindrical member including number indicia arranged thereon in seriatim repetitively in coordinates of seven extending about the circumference of said inner cylindrical member and including rows of indicia spaced axially of said inner cylindrical member, said window being of a dimension axially of said outer cylindrical member to view six axially spaced rows of indicia therethrough and of an angular dimension about said outer cylindrical member to view seven indicia spaces in each row, a single generally cylindrical masking panel member disposed intermediate the first and second cylindrical members including a pair of elongated side-by-side indicia space masking strip portions extending peripherally thereabout and including one pair of corresponding ends facing in one direction thereabout and staggered lengthwise therealong a distance equivalent to at least seven of said indicia spaces, said masking panel member being manually angularly displaceable relative to said first and second cylindrical members to selectively mask two rows of spaces adjacent one edge of said window extending about said outer cylindrical member.
Dependencies are inferred from the claim text.