US1180778A

US1180778A - Calendar slide-rule.

Info

Publication number: US1180778A
Application number: US4346515A
Authority: US
Inventors: Andrew T Lewis
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-08-03
Filing date: 1915-08-03
Publication date: 1916-04-25
Anticipated expiration: 1933-04-25

Description

. LEWIS.

CALENDAR SLIDE RULE.

APPLICATION FILED Aus. 3. I9I5.

Patented Apr. 25, 1916.

STATES PATENT onirica.

'nN'DnnwJi". Lnwis, or' PORTLAND, OREGON.

I CALENDAR SLIDE-'RULE vide an improved construction of calendarslide rule for accurately determining the number of days on which interest and discount is to be calculated, and for general use a simple time saving device for counting `the number of days from any date to a'iliy o accomplish this object the invention pro vides an improved constructionof calendar v in which is included two arts relatively adjustable, oneof 'which Orms a base upon whichis arbitrarily arranged the calendar of two full years with the days of the month arranged in lines of seven days each and iii seven long vertical columns with the smer- Y hereinafter bols or iguresof the seven columns di ently rinted in such a way as to aid the eye in fo owing a column, the month indicator being placed to the left of each set of week day ines that constitute a complete month, the other part of the said calendar being in the-nature of a slide frame which includes right and left vertical members joined at the top and bottom by end members, the vertical members of the said slide frame inside v.the ends having fifty-three lines of figures that indicate the total number of days in a year plus the last week of a preceding year when the frame is placed at the top of the calendar.

With other objects in view that will here-..

inafter appear, my invention is an improved slide rule calendar that embodies the peculiar construction and arrangement of parts fully described, specifically 'pointed out in the `appended claims and illustrated in the accompanying drawings, in which P l Figure 1 is a face view of my improved `'slide rule calendar. Fig. 2 is a transverse section of the same on the line 2-2 of Fig. 1. Fi 3 is'a front view of -the same, the slide ame bein at the position X hereinafter e laine so much of the day and month in icator symbols or igures being yshown'as is necessary to illustrate the operai' tive adjustment of the several parts. Fig.

`Specification of Letters Patent.

PatentedA Apr. 25, 1916.

4 is a' similar view, the slide frame being at the position Y hereinafterparticularly ex lained.

y improved slide rule calendar which is composed of two parts, a main body or base member and a movable frame that is slidably mounted thereon, may be formed of any suitable material and when my improved device is to be put up in a cheap form, particularly adapted for use as an advertising medium, it is preferably made of wood, Celluloid4 or heavy cardboard to provide for conveniently printing the desired advertisement on the blank or back side thereof. Thebase member 1, which is in the nature of a rule, is of sufficient length and width to include a system of lines and columns of figures that indicate the days, weeks and months of at least two full years, it being understood that the said base or rule member 1 may vary in length and width, according to the size of the type in printing the calendar on the face of the rule. At one, or both, edges the rule member 1 is marked oi into inches, as designated by 2, and that portion of face 10 of the member 1 that has the symbols or printed figures is thickenedv to provide opposite undercut edges 3, the purpose of which will presently appear. The days of the months are arranged in lines of seven days each, andthe said lines are hereinafter designated the week lines 4, and the symbols' or figures that indicate the days of the month are, in consequence, shown in seven long vertical columns hereinafter designated the date columns 5, and some of the said columns, preferably the second, fourth and sixth columns are printed in black face type, the others bein in light face type to thereby aid the eye in following such column. For calendar purposes, January first is placed in the column in the first week line 4 under the day of the week that the year begins, as arranged in calendars inY general use; for counting purposes, January first is placed in any ofy the date colunms 5 in the first line. 6 designates a slide frame which consists of an upper and lower end member -61 which extend transversely over the calendar face of the member 1 and .vertical side members 62-62' join with the side-end members 60--61 and which ride upon theouter or flanged edges of the base 1` with their inner Aco edges extended under for engaging-the undercut 3 of the said face portion 10, as shown m Fig. 2, by reference to which it will also be noticed the upper surface of the side members are even with the calendar face 10. The upper edges of the end members --61 of the .slide frame, move over the calendar face 10 parallel with its week lines 4 and the inside length of the sides 62, between the ends 60-61 is such as to include fifty-three week lines on the calen- -dar face to provide for having at all times 365 da s in a vertical column on each of the sai sides 62 when in an position on the calendar, the date from being excluded from the count. Letters '7 indicating the days of the week from the calendar may be placed on the end members 60-61 to ride over the date columns 5, as will be clearly understood from Fig. 1 of the drawings, which also shows the figures on the sides 62 of the slide frame stepped in week totals from 0 ,to 7, 14, 21 and so on.

By reason of the arrangement of the system of figures in transverse lines and vertical columns on the base member 1, and a sliding frame with a system of figures stepped in sums of seven days for each successive line, I have provided a simple and readily manipulated means or device for indicating the number of days of any column down from the top end to any line below, or from the bottom end up any column within the sliding frame. With the sum of the successive seven days indicated on the frame before or following each line it is an easy process to ind the number of days between a certain date in one month and another day in another month counting backward or forward. There are as many sevens down or up a vertical column from a date in a line as dates below or above indicated on the right or left side member 62 of the frame 6.

To count forward, the lower ed of the top end 60 of the sliding frame 1s moved just above a week line in the calendar containin the day from, follow the column down rom the date from to the line containing the date to if more days in the line to the right of the column, add the number of days to the number on the frame to the ri ht of the line; if less days to the left ofg the column, subtract the number of da s fromv the number on the frame to the rig t of the line. In an case the most to add or subtract is six ays. Six of the same days of a month of any line of the calendar under the lower side of the upper end of the sliding frame are found at the bottom of the frame above the upper side of the lower end thereof (see Fig. 1). Counting backward is the reverse of counting forward. The left side member 62 is used for the back count.

not be changed from year to year. When The manner in which my slide rule calendar is used is best ex lamed as follows: To find'the `number of a s from February 22nd to July 4th, forward, move the lower side of the upper end 60 of the slide frame just above the line containing February 22nd so that the lines ofl the calendar and the members of the slide frames sides will register (see position X Fig. 3) and follow the-vertical column of figures of the calendar down 'from February 22nd to the line containing July 4th. The sum 'of the successive sevens to and including July 5th in the same column is 133 days, indicated on the right hand side 62 of the frame 6. July 4th is to the left of the column or one day less, or 132, the number of the days between February 22nd and July 4th counting forward. To count backwardly, set the frame 6 to the position Y, as indicated in Fig. 4, which shows the lower end just below the lowermost line containing February 22nd and reading up the vertical column of figures of the calendar from February 22nd to the line containing July 4th, the sum of the successive seven days to and including July 6th-in the same column with the lowermost February 22nd is 231, indicated on the left side of the frame 6. There are two more days to July 4th counting 95 backward, or 233 days, the number of days between February 22nd and July 4th counting backward.

For counting purposes the calendar need February has 29 days an eXtra day may be added to the count. For calendar and counting purposes the calendar may be used for different years by changing the days of the week on the end members 60-61.

To find when a note matures made March 4 and due in ninet days, move the lower side of the upper end 60 just above March '4th, follow the vertical column of figures on the right hand side 62 of frame 6 to 91 11o on frame. June 3rd in line to the left is 91 days from March 4th; one day less would be June 2nd when note matures.

From the foregoing taken in connection with the accompanying drawing, the complete arrangement and the several uses for which my calendar is adapted will be readily apparent to those skilled in the art. It is obvlous that the device may be used as a foot rule, a ruler, a calendar and means for quickly determining the number of days between two diiierent dates.

The operation ofA my invention is simple, and among other advantages is the ease and efliciency of such operation, the low cost of manufacture so that it may be readily utilized as an advertising medium, the nonliability of the parts becoming inoperative and the coperatlve connection of the calendar carrying base or member and the slide 1.0

frame by which with a minimum amount of labor and time, the information desired is attained.

What l claim is:

l. A calendar of the character described, comprising two members mounted for movement relative to each other, one of the members having a calendar base carrying a series of vertical colums horizontally divided into a series of lines indicating successive week days in a year, a slide frame including upper and lower cross members, the upper one of which is adapted for being set with its lower edge over the horizontal line of gures in which is included the from date, said sliding frame having rows of iigures at the right and left hand edges spaced to form week intervals and adapted for being brought into register with the week lines of the vertical columns that indicate the days of the week.

2. in a device of the character stated, a base member and a slide member mounted thereon, a continuous monthly calendar on the face of the said base member and extending in a vertical column and embracingperiod of two years, said slide member having an opening to expose approximately one-half of the said calendar, said slide member having side columns paralleling the calendar and graduated to indicate successive periods of seven days each, said slide member having two transverse straight edges spaced apart a distance equal to fifty-three week lines or" the calendar.

l. A calendar of the character described, comprising a base member having a central longitudinally extended raised portion having undercut edges, a continuous monthly calendar embracing a period of two years and comprising a series of vertical columns indicating days of the week and transversely divided into horizontal lines indicating weeks of the month on the face of the said raised portion, and a slide frame consisting of upper and lower end members movable over the calendar face of the base member in parallelism with the week lines of the month and sides that slidably engage the undercut edges of the calendar face and which connect with the end members, and said sides each having a column of figures paralleling the horizontal lines of the calendar and graduated to indicate successive periods of seven days each, the column on one of the said sides reading from the top down and the column on the other side reading from the bottom up.

ANDREW T. LEWS.

ln the presence o- E. E. Lnwis, M. FREEMAN.