Device for converting values of one unit system into equivalent values in another system

Claim 1

A DEVICE FOR CONVERTING A VALUE OF ONE SYSTEM OF UNITS INTO AN EQUIVALENT VALUE IN ANOTHER SYSTEM OF UNITS REQUIRING THE USE OF A CONVERSION FACTOR, SAID DEVICE INCLUDING A CARD MARKED WITH A VERTICAL TABLE COMPRISING A MATHEMATICAL PROGRESSION OF VERTICALLY ALIGNED NUMBERS STARTING WITH A MULTIPLE DIGIT NUMBER AND WITH EACH NUMBER HORIZONTALLY FOLLOWED BY THE PRODUCT OF THE NUMBER MULTIPLIED BY THE CONVERSION FACTOR AND WITH THESE PRODUCT NUMBERS VERTICALLY ALIGNED, SAID TABLE FURTHER CONTINUED AS COLUMNS WHICH ARE EACH HORIZONTALLY DISPLACED WITH RESPECT TO THE PRECEDING COLUMN, AND A COVER FOR SAID TABLE COMPRISING A TRANSPARENT FLAT SLEEVE IN WHICH SAID CARD IS SLIDABLE AND REMOVABLY INSERTED AND WHICH IS SLIDABLY CONNECTED WITH SAID SUPPORT SO AS TO BE SHIFTABLE IN THE HORIZONTAL DIRECTION OF THE TABLE, SAID COVER HAVING MEANS FORMED BY SUBSTANTIALLY OPAQUE VERTICAL STRIPS ON SAID SLEEVE FOR OSBCURING VISIBILITY OF AT LEAST ONE VERTICAL ROW OF THE VERTICALLY ALIGNED DIGITS OF THE FIRST NAMED NUMBERS AND MEANS FOR SIMULTANEOUSLY OBSCURING THE VERTICALLY ALIGNED DIGITS OF THE PRODUCT NUMBERS WHICH ARE IN EXCESS OF THE PRODUCTS OF THE UNOBSCURED PORTIONS OF THE FIRST-NAMED NUMBERS MULTIPLIED BY SAID CONVERSION FACTOR, SAID SUPPORT HAVING SAID MEANS FOR EACH OF SAID SELECTIONS.

Claim 2

A DEVICE FOR CONVERTING A VALUE OF ONE SYSTEM OF UNITS INTO AN EQUIVALENT VALUE IN ANOTHER SYSTEM OF UNITS REQUIRING THE USE OF A CONVERSION FACTOR, SAID DEVICE INCLUDING A CARD MARKED WITH A VERTICAL TABLE COMPRISING A MATHEMATICAL PROGRESSION OF VERTICALLY ALIGNED NUMBERS STARTING WITH A MULTIPLE DIGIT NUMBER AND WITH EACH NUMBER HORIZONTALLY FOLLOWED BY THE PRODUCT OF THE NUMBER MULTIPLIED BY THE CONVERSION FACTOR AND WITH THESE PRODUCT NUMBERS VERTICALLY ALIGNED, SAID TABLE FURTHER CONTINUED AS COLUMNS WHICH ARE EACH HORIZONTALLY DISPLACED WITH RESPECT TO THE PRECEDING COLUMN, AND A COVER FOR SAID TABLE COMPRISING A TRANSPARENT FLAT SLEEVE IN WHICH SAID CARD IS SLIDABLE AND REMOVABLY INSERTED AND WHICH IS SLIDABLY CONNECTED WITH SAID SUPPORT SO AS TO BE SHIFTABLE IN THE HORIZONTAL DIRECTION OF THE TABLE, SAID COVER HAVING MEANS FORMED BY SUBSTANTIALLY OPAQUE VERTICAL STRIPS ON SAID SLEEVE FOR OSBCURING VISIBILITY OF AT LEAST ONE VERTICAL ROW OF THE VERTICALLY ALIGNED DIGITS OF THE FIRST NAMED NUMBERS AND MEANS FOR SIMULTANEOUSLY OBSCURING THE VERTICALLY ALIGNED DIGITS OF THE PRODUCT NUMBERS WHICH ARE IN EXCESS OF THE PRODUCTS OF THE UNOBSCURED PORTIONS OF THE FIRST-NAMED NUMBERS MULTIPLIED BY SAID CONVERSION FACTOR, SAID SUPPORT HAVING SAID MEANS FOR EACH OF SAID SELECTIONS.