US216975A

US216975A - Improvement in calendars

Info

Publication number: US216975A
Authority: US
Publication date: 1879-07-01
Anticipated expiration: 1896-07-01

Description

J. W. ROBINSON.

Calendars.

No. 216,975. `Patented July 1, |879.

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Inl/'anfora N. PETERS, 'FNnTo-UTHDGRAFHER. WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

JAMES W. ROBINSON, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN CALENDARS..

Specification forming part of Letters Patent N0. 216,975, dated July 1, 1879 application filed v April 9, 1879.

To all lwhom it may concern Be it known that I, JAMEs W. RoBnvsoN, of

Boston, of the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Calendars and do hereby declare the same to be described in the following specification, and represented in the accompanying drawings, of whichyear, the first being to the left and the second to the right. Besides such tables the calendar has a sliding scale,O, of days of the week, such scale being placed Vbetween the two tables, and applied to one of them by clasps a a, so as te be capable of being moved lengthwise between and parallel to them. This scale has the names or abbreviations of the names ofthe days of six weeks arranged on it in their order, as shown, each Sunday being denoted by a letter, S.

At the head of cach table are the names or abbreviations thereof of the months in a year from January to December, inclusive, all being in one line 5 and below each, at equal distances apart corresponding to the distance apart of the names of the days on the sliding scale O, are the numbers of the days of eachI mon th, and against each of said numbers is a smaller number of figures, indicating what day ofthe year the day of such number is.

As Wednesday was the first day of January ofthe year 187 9, the iigure l indicative of such is placed on the third line from the top, the

iirst line being supposed to representMonday. The Viirst days of February, March, and November, being Saturday, come on the sixth line, the rst of April and July on the second line, the :tirst day of May on the fourth line, the rst day of June on the seventh line,'the rst Y day of August on the fifth line, and the iirst lays of September and December on the first From each of said startings of the rst day of each month the other days of such month are numbered downward consecutively, as Shown. f-

The leap-year table is alsoV similarly made; but as it has three hundred and sixty six days, the first day of March becomes the sixty-rst instead of the sixtieth day or the year, as it is in the other table.

The object of having the week-day scale to slide endwise between the two tables is not only toenable it to be properly adapted to either table for any year, but to enable a person to ascertain the day of the week corresponding to any date in this century or in others.

Attached to the first table, A,is whatlterm the Reference-Table,77 which gives the years of this century, and against a number which in the vertical column of days in December of the first table is opposite the first Sunday of that year-as, for instance, the iirst of January 1800-is Wednesday.

, New, the sliding scale being set so as to bring Wednesday of the iirst week opposite January 1, we shall iind the following Sunday opposite the number 7 in the column for December, such number corresponding with the number against 1800 in the referencetable. The other reference-numbers for the other year are obtained in a similar manner.

To find the day of the week of any date in this century, place one S of the sliding scale opposite the date in December column of the left table indicated by the number opposite that year in the reference-table. The weekday sought will be found opposite the given date.

For example, to find what day of the week was June l0, 187 3, place one S of the sliding scale or slip opposite December 7, and it will be found on the left table that Tuesday.

is the day-name sought. So to find the day of the vweek for August 12, 1824, (a leapyear,)

place S opposite December 6 of the left-hand table, and we haveThursday opposite August 12 in the right-han d table.

The rule for finding dates in other centuries is stated at the foot of the left-hand table.

The two tables I usually write or print on separate sheets of pasteboard, or -other suitable material, and hinge or so connect them as to enable either to be folded over upon the other, the hinge connection being shown at h.

What I claim as my invention is i in connection with the reference -tab1e, as The calendar, substantially 'as described, specified. consistinff of the slidinfr slip or scale C, having uponbit the names 5f the days of a series v JAMES W ROBINSON' of Weeks, as represented, and the two com- Witnesses: mon and leap year tables 0r tablets A B of R. H. EDDY,

months and days thereof, arranged as shown, W. W. LUNT.