USRE8334E - Improvement in perpetual time and interest calculators - Google Patents

Description

ash eethsheez 1 J. KAGEELMAN; J1". Perpetual Time and Interest Calculator. No. 8,384;

Reissued MM/16,1878; 121

ifftize so as;

SQheGts -SQLeetL J. KACHBLMAN, Jr. I Perpetual? Time and Interest Calculator.

Np. 8,334; lq fi eiss'rued July I6, 1878.

J.-KACHELMAN ,J1'. Perpetual Timgand'Interest|0a, 10u1a.tor1 No.. 8,334, Rissued July 16, 1,378,

a was Sheet 3.

UNITED STATES PATENT OFFICE.

IMPROVEMENT \N PERPETUAL T .in., or nvaxsvinnn, irony.

ME AND lll-TEREST CALCULATORS.

. pci-ilicai ion forming we... so. 201,617, dated March 26,]

1878 application filed June 25, 1378.

svs; Rk'lsHllP so. 8,334, time To alletchom it may concern:

v ieit-known that 1', Join: Kacnnmmx, Jr, of Evansville, in the county of Yanderburg and State of Indiana, have invented a new and useful Improvement in Perpetual Time and I'lItBIQSiE Calendars, which improvement is fully set forth inthe following specification and accompanyingdrawing, in which latter- Figure 1 is a plan view of my improved calendar. Fig. 2 is a transverse section of the same. Fig. 3 is a detail view of the same. F i .g. 4. is a modification of the-same. Fig. .5 is an edge view of the above modification. Fig. -6 is another modification, shownin transverse section.

The nature of my invention consists in one stationary and one revolving circulartable, the one having the number of days in a common year, the names of the days of the week, the numbers of the years, beginning with 1700 and ending with 1992, or any other suitable series of numbers of that class, with the name of the week-day coming on the 1st of March of each leap-year, and computations of the most popular rates of interest arranged in circular concentric. columns; and the other table containing the dates of the twelve months or a common year, whereby days of the week, monthly dates, and daily and monthly interest may be instantly found and applied to calculations in business.

My invention-also consists in the construction of the two concentric tables of, light material, such as paper, tin; or a suitable combination of such material, having the abovementioned characte s names, computations, and so 011 engraved, stamped, printed, or painted upon their surfaces, and fastened together and to a backing of pasteboard or other suitable material, whereby a light and cheap portable article is produced.

In the drawings, A represents a piece of paper, tin, or other thin and light material, which is provided with a number of concentric circles, a. I) c d c f g h. The said concentric circles are equally divided by 365 radii.

Between the circles to b the numbers 012 3 up to 364 are inscribed, 0 being the beginning number, for the reason that the first day does not bear interest and cannot be counted in computing interest, as will he hereinafter exdisk,

plained. Between the circles l) c the names of the days of the week are inscribed in regu-.

lar succession. Between the circles c and dthe number of the 1992 are inscribed inrcgular order, having the name of the 1st day of Maich inserted after each leap-year. The arrangement of the columns between the circles be and c d is also such that opposite ea *h year the name of the weekly day upon whiclithe 1st of January falls is placed.

Between the circlcsd c fg h the computations of interest are: inscribed-in the following manner: From radius i in 3 to radius j there are the amounts of interest of thirty consecutive days at three per cent., four per cent, and five per cent. per annum. on a capital of $100. Between the radii j. and It is a similar arrangement of interest from thirty-one to sixty day $100, $2M), and $300 at ten per num. I

The above-mentioned computation est are to extend over the entire year, this being sutticientto explain its working. Additional spaces may be added, which may be filled with computationsof a similar character.

' Within the circle a a revolving table, 13, is secured, which has around; its margin the twelve months of the common year and the dates thereof arranged in successive order. p

The tables A 1") may be made of' paper, tin, pasteboard, or any suitable material, and the inner table Dina-y be stiffened by ribs O of stronger material, as shown in Fig. 4, or by a C, as shown in Fig.1.; The table 1-3 is provided with acenter-"knob, D, and a center screw or pivot, (I, whereby it may be attached to aboard, E, as seen. in Fig. 2. To overcome any'objection to the use of the ltnob, a number of holes, I), are provided in the inner table 13, which thus may be revolved with the point hand.

The table A may be cut out around the circle a, so that thesurface of the inner table 1; is flush with its own surface, as scenin Figs. 2 and 6; or it may be made of a solid sheet, and the table I) placed concentrically upon it, as seen in Fig. 5.

'lihe calender may be cent. per an;

s of intery e a-rs'between 1700 and there s for capital sums of of a pencil or with the,

fastened by means of first column of the table A.

. ii'nal date will be seen.

given, the interest positefApril 10 will be found T.

the number of days.

metal clasps (t', or may be glued or otherwise fastened to a piece of 'pasteboard or other suitable backing, as indicated at E, Fig. 2. The characters, names, and computations are either printed, painted, stamped, on engraved upon the surfaces of the tables A B.

Operations: \Yhen the number of days between two given dates is to be ascertz'iined, the earlier date is found on the table B and placed opposite 0 in the first column of the table A. The number opposite the latter date denotes thc'days to be counted.

If a date is given, and a number ot days to succeed it, the final date is found by placing the given date on the table'B opposite 0 in the 0n the table 13, opposite the given'number of the table A, the

If the name of the weekly day of a-given yea-r is to be found, look in the column 0 (l for the year, and in the column I) c, opposite the year,

will be found the weekly day on which J anuary 1 will fall.

If the percentage, capital, and dates are is found by placing vthe -arly date on the table I opposite 0 on table A, and opposite the final date on the correspondinginterest-colunm of table A the amount of interest may be read off.

Examplesto the above-given rules of operation:

How many days from February 12 to April Place February 12 opposite 0, and op- Answer: 57, the number of days, and during a leap-year this would be 58.

How many days from September 8 to February 15 llace September 8 opposite'O, and opposite February l5 will be found 160,

A note is dated June 6, having days to run; when does it becomedue t Place June (iopposite 0, and opposite 60 will then be found A gust 5,sho\ving' the note to be due- August 5-S. w v

' \Vhat day of the week did February 14, 1736, fall on Z First find 17-36 between the circles c d, and opposite it, between the circles b c, we read Sunday. Now place January interest calendar.

1 opposite Sunday, and we find February 14 opposite Tuesday, the desired name.

On what day of the week was June 12, 17.56! Table A shows us that March 1 in 1736 falls on Thursday; we thereiione put March 1. of table B opposite Tl1ursday,and then we look opposite June 12 and find Tuesday, showing the day of the week on which it fell.

13y placing; the months and dates on the ta ble A, and the numbers, the weekly days, and perpetual almanac, I produce the same effect without departing from the principles of my 1nvent1on.

table, A, having arranged between concentric circles a- I) e [i cfg h the number of days in a common year, beginning with and ending; withSGi, the names of days in a whole year in consecutive order, the numbers of years from 1700 to 1992, or equivalent, with the name of each 1st day of March marked after each leap-year, and the computations of interest for capitals of various amounts, as and upward, and for various interests, as 3 per cent.- and upward, whereby calculations of time and interest, or determinations of weekly days for a given time, are pointed out, and can be read off from the table A by meansof one movement each ofthe table-B, substantially as set forth,

'2. In the described time and interest computing calendar, the combination of the stationary columns I) c and c (7, whereby the names of the days for each January 1 are found in columns I) c opposite the corresponding years in column 0 d of the perpetual calendar, sub stantially as setforth."

Witness my hand in the-matter of my application for apatentfor a JOHNKAUIIELMAN, Jn. Witnesses:

JOSIAH Kn: IITLY, THOMAS ltrs'rlx.

perpetual time and

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