Slide rule - calendar

• US 4,418,274 A
• Filed: 03/20/1981
• Issued: 11/29/1983
• Est. Priority Date: 03/24/1980
• Status: Expired due to Fees

• Current Assignee: Guido Masillo
• Original Assignee: Guido Masillo
• Inventors: Masillo, Guido
• Primary Examiner(s): Fuller, Benjamin R.
• Application Number:
  US06/245,783
• Time in Patent Office: 984 Days
• Field of Search: 235/69-70 D, 235/89 R, 235/116, 235/85 R-88 RC, 40/107, 40/109
• US Class Current: 235/85.00R
• CPC Class Codes: G06C 3/00 Arrangements for table look-up, e.g. menstruation table
• CPC Class Codes: G09D 3/10 with members in band form

Abstract

A slide rule-calendar having a fixed part, two sliding parts and a cursor. On the lower portion of the fixed part, the thirty-one days of the longest month are indicated horizontally. The twelve months of the year are indicated on the left vertical portion of the fixed part and also on the cursor.

By positioning the two sliding parts on predetermined parameters shown on the top and bottom left portion of the fixed part which parameters correspond as a pair to a series of equivalent years and by moving the cursor to the desired day, all the days of the week of the equivalent past and future years corresponding to said pair of parameters can be determined, with only one positioning of the two sliding parts.

Claims

1. An infinite calendar comprising a flat sheath member defining an enclosed space having closed front and rear surfaces, closed top and bottom surfaces, a closed first end, and an open second end;

first and second slide members slidably received within the enclosed space and slideable out said open second end and with respect to each other, said first and second slide members being of a length to abut against said closed first end when fully withdrawn within said enclosed space;

said first slide member having thereon two rows of indicia correlated respectively to the first two months of the year, said second slide member having thereon rows of indicia correlated respectively to the remaining months of the year, each row of indicia including indicia indicative of the days of the week for a plurality of weeks at least equal to the number of weeks in the correlative month;

each of said slide members additionally having an indicator indicium thereon;

said sheath member front surface having thereon two sets of seven correlating indicia, one set of correlating indicia adjacent each of said indicator indicia when said slide members are positioned in said enclosed space;

said sheath member further having along one edge thereof numerical indicia corresponding to the days of the month and having a transparent window overlying said slide members rows of indicia when said slide members are in said enclosed space to make said rows of indicia visible through said transparent window;

a cursor member slidably positioned on said sheath member and having a transparent window overlying said front surface transparent window to make said rows of indicia visible therethrough and a marker adjacent said sheath member one edge;

one of said members having thereon a table correlating the years of the Gregorian calendar with a pair of said correlating indicia, one of said pair of said correlating indicia being from the set adjacent the indicator indicium of said first slide member and the other of said pair of said correlating indicia being from the set adjacent the indicator indicium of said second slide member, the pair of correlating indicia correlated with a selected year of the Gregorian calendar being the correlating indicia to be positioned adjacent said indicator indicia to position said first and second slide members such that said rows of indicia align with said numerical indicia to provide a calendar for the selected year with said cursor member slidable to a selected one of said numerical indicia to show through said transparent windows the day of the week for the day of the month corresponding with the selected numerical indicium for each month of the selected year.