Interest Calculator Page: 4 of 5
[2], 3 p. : ill. ; 23 cm.View a full description of this patent.
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1,060,997
(365) equal spaces by 'radial lines, which
register with the radial date lines in the cal-
endar spaces, as clearly illustrated in Fig. 1.
These radial lines on the part 5 are num-
5 bered consecutively from "1" to "365," in-
clusive, and the line containing or repre-
senting the number "365" is provided with
a pointer 7 which is' conspicuous so that it
may readily be observed whenever the device
10 is to'be used. When it is desired to ascertain
the number of days between any two dates,
less than one year apart, the part 5 will be
turned to place the pointer 7 at the earlier
date and then by observing- the later date
1a in the calendar portion on the line at the
part 5 which registers 'with the said later
date the total number of days between the
two dates will be known because the total
number of days are contained or represented
20 upon the line at the said part 5.
The part 5 contains- a recess 8 for each of
the radial lines which, as stated previously
and described, are consecutively numbered
from "1" to "365," inclusive. A card or plate
25 9 is arranged to operate in each of the re-
cesses 8, the upper edges of said cards or
plates preferably being flush with the upper
surface of the part 5 containing them. The
said cards or plates may be provided with
30 projecting tabs or ears 10 to be engaged by
the fingers of the user when it is desired to
remove or raise any one thereof to observe
the interest tables and calculations con-
tained or represented on said cards or
36 plates. A preferred arrangement is to have
represented on each of said cards or plates
tables or calculations showing the interest
at different rates of interest and on differ-
ent sums or amounts of money for, a period
40 of time, that is for the number of days, to
which the said card. or plate corresponds.
It will be observed that there is one of these
cards or plates for each of the three hun-
dred and sixty-five radial lines so that there
45. will be an interest table for any number of
days less than a year for various sums of
money and at various rates of interest. As-
suming that it has been found that there
are one hundred and fifty-five (155) days
50 between the earlier and the later date the
card or plate in alinement with the later -
date when the part 5 has been adjusted, as
previously described, may be raised to show
the amount of interest on various sums or
5 amounts of money at the various rates of
interest commercially employed for the one
hundred and fifty-five (155) days ,for which
interest is to be calculated. This arrange-
ment and operation prevails throughout
6 from the first to the last card or plate so
that the amount of interest on any given
amount and at any commercial rate may
quickly be ascertained.
Projections or ears 10 are preferably in
g staggered relation so that they may be en-gaged. The inner ends of the said cards
or plates are preferably held by a pivot
rod 11 which extends through the wall por-
tions separating the recesses in which the
cards or plates are contained. An annular 70
plate 12 secured to the upper surface of the
part 5 is provided with a series of notches
registering with the recesses 8 and forming
extensions which rest upon the walls sepa-
rating the said recesses 8 and constitute
guides or retainers for the cards or plates
when they are raised.
The device may be composed of any suit-
able material and may be of any desired di-
mensions.
I do not restrict myself to specific fea-
lures of construction and arrangement and
am aware that there may be various changes
and alterations and modifications of the
various parts without departure from the 85
spirit and scope of the invention, but what
I claim and desire to secure by Letters-Pat-
ent is-
1. An interest calculator comprising an
annular support, divisions on said annular 90
support representing the months, and desig-
nations of the months and the number of
days of the various months in said divisions,
in combination with a member within said
annular support and having in its upper 95
side a recess' for each day of the year, an
interest table movably mounted in each of
said recesses, designations of the days of
the year opposite said recesses, respectively,
and means preventing removal of said in-100
terest--tables from said member, substan-
tially as specified.
2. An interest calculator comprising an
annular support having on its upper flat
side divisions representing the months, and 105
.designations of the months and the numbers
of the days of the various months in said
divisions, respectively, in.-combination with
another member movably mounted on said
support and having its upper side in the 110
same plane or flush with the upper side of
said support and having in its upper side
a recess for each day of the year, designa-
tions-of the days of the year on said second-
named member opposite said recesses and 115
arranged to register with the divisions of
the days of the months on said support, an
interest table movably supported in each
of said recesses, and means preventing de-
tachment of said interest tables from said 120
member, substantially as specified.
3. An interest calculator comprising two
members adjustable in connection with each
other effectively to make a visual indication
of the number of days between two selected 12s
dates, interest tables containing calculations
of interest on various sums of money for
various selected periods of time at various
rates of interest, compartments in one -of
said members in which said tables areo
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Reference the current page of this Patent.
Moody, Jason B. Interest Calculator, patent, May 6, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853609/m1/4/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.