Interest Calculator Page: 3 of 5
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UNITED STATESPATENT OFFICE.
JASON B. MOODY, OF DALLAS, TEXAS.
INTEREST-CALCULATOR. .1,060,997.
Specification of Letters Patent.
Patented May 6,1913.
Application filed October 25, 1911. Serial No. 656,724.
To all whom it may concern:
Be it known that I, JASON B. MOODY, a
citizen of the United States, residing at
Dallas, county of Dallas, and State of Texas,
a have invented a new and useful Interest-
Calculator, of which the following is a speci-
fication.
This invention relates to interest calcula-
tors, and it comprises the novel. construc-
10 tion, combination and arrangement of parts
herein shown, described and included within
the scope of the appended claims.
An object of the invention is to provide a
device for calculating interest, and for
15 similar purposes, comprising a calendar and
another part containing.numbers represent-
ing the clays of the year from "1" to "365,"
inclusive; the part containing the calendar
and the part containing the day numbers for
20 the year are relatively adjustable so that the
total number of days between any two dates
within the year may be quickly ascertained;
the part containing the day numbers sup-
ports tables, in the form of cards or plates,
25 on which are printed or shown interest cal-
culations for different sums at various rates
of interest for the period of time represented
by the cards or plates, respectively.
I have not attempted to mention specifi-
30 ally all of the objects and advantages of my
invention and there are many other objects
'nd advantages which do not require specific
mention, but which will appear in the fo-
lowing detailed description, reference being
35 made to the . accompanying drawings in
which I have shown a convenient embodi-
ment of my invention, and in which-
Figure 1 is a plan showing a portion of
the complete interest calculator, the portion
40 illustrated in this view including the months
of October, November, December, and a part
of the month of January and, the calendar.
portion, and illustrating, the clay numbers
for the latter portion of an annual period.
45 Fig. 2 is a reduced view showing the entire
device. Fig. 3 is an enlarged sectional view,
showing a convenient arrangement of the
calendar part and the day number part
whereby they may be readily adjusted for.
50 purposes of calculation.. Fig. 4 is an en-
larged plan view showing the arrangement
of the cards or plates containing the in-
terest calculations or tables. Fig. 5 is a ver-
tical sectional view showing the convenient
55 method of holding the cards or plates inthe proper position and adjustment. Fig. 6
is a sectional view on a line such as a-a of
Fig. 4.
In the embodiment shown the calendar
portion 1 constitutes the outer portion of a 0
stand or support 2 which may, if desired, be
supported upon legs 3. I have illustrated
the calendar portion 1 as annular in form
and having its upper. portion divided into
twelve parts or sections, representing the 65
months of the year. These twelve sections
are of different sizes, being proportioned in
accordance with the number of days in the
various months. For instance, January,
March, May, July, August, October and De- 70
cember each contains - thirty-one days,
whereas April, June, September and Novem-
ber each contains thirty days, while Febru-
ary, in such calculations, is always regarded
as containing twenty-eight days, and these 75-
divisions containing the names of the months
have the same relation to each other as to
size as there are-number of days in the vari-
ous months. That is to say, the spaces for
the months of January, March May, July, 80
August and October are divided into thirty-
one equal parts by equi-distant radial lines,
while the spaces for April, June, September
and November are divided into thirty equal
parts by , radial lines. This arrangement is 85
clearly illustrated in Fig. 1 showing the
radial line for October' and December con-
secutively from " 11"to "31," inclusive, while
the radial lines in the space for November,
for instance, are numbered from "1" to "30," 90
inclusive, and this arrangement, it will be
understood,' is followed throughout. The
name or abbreviation of the name of each
month is printed or stamped or otherwise
represented in its proper space, as clearly 95.
shown in Figs. 1 and 2. The month spaces
are separated by suitable demarcations, as
shown at 4, these demarcations being prac-
tically continuations of the radial lines-rep-
resenting the last day of the month, as may 00
be clearly understood by reference to Fig. 1.
I-n the embodiment shown the member 5
fits within the annular calendar part "1"
and is arranged to revolve therein. A cen-
tral pivot 6 holds the two parts together and 105
permits relative movement and adjustment
for any purpose within the scope or sphere
of uses of the device. The upper surface of
the part 5 near its outer edge or periphery
is divided into three hundred and sixty-five 110
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Moody, Jason B. Interest Calculator, patent, May 6, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853609/m1/3/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.