Year: 1886

page_text: I JULES VICTOR CHARPANTIER of N° 6, Carondelet Street New Orleans Parish
of Orleans State of Louisiana United States of America Notary Public, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This Invention relates to improvements in calculating apparatus, and has for its
object to facilitate the determination of the amount of interest, number of days of
interest and discount, as well as the date of maturity of Bills of Exchange and
other monetary documenta.
Reference is to be had to the accompanying drawing, forming part of this
Specification in which figure 1 is a face view of my apparatus the lid being open,
and figure 2 is a longitudinal section thereof the lid being closed. The same
letters of reference indicate the same parts in both figures.
The apparatus comprises a box or support A an indicator B, an interest table C,
a maturity table D, and a period table E, such terms being employed for con-
venience of description. It is usual to provide the box A with a lid a hinged at
one edge and by closing which the apparatus may be protected from dust etc,
when not being used. In this box I fix the indicator B, formed in the present
instance of a transverse strip divided into a series of spaces 6 marked to indicate
those periods most commonly used in Bills of Exchange such for instance as
shown. The maturity table D is formed of a sheet usually of paper wound at its
ends on rollers F and carried intermediately of such rollers over a guide f by which
its registered or exposed portion is brought close to the indicator B. This sheet' D
is divided transversely into a number of sections d corresponding to the months of
the year, and each of said sections is in turn divided into sections or spaces d¹
corresponding to and in register with the spaces 6 of the indicator B. The month
Bections are also provided with a longitudinal series of spaces d' containing the
number of days in the given month. In the spaces d¹ opposite such days of the
month are marked the days of maturity and grace of a Bill or Note bearing date
with such date of month and of a duration equal to the period marked in the
registered space of the indicator B. In the spaces d' are also marked' reference
letters A, B, C, etc; for the purpose presently described.
Above the indicator section B I arrange the interest table C formed usually of a
sheet of paper wound at its ends on rollers G and passed intermediate of said
rollers over guides 9. This interest table is formed of a series of tables, one for

page_text: each of the usual rates of interest, each of which is provided with a longitudinal
row of spaces c marked with reference letters A B C etc. I also divide these
tables into spaces c' registering with the spaces b of indicator B, in which
spaces opposite A are marked the amount of interest on one dollar or other
monetary unit for the period marked in the registered space 6 while the marks
in spaces opposite B and C indicate the amount of discount, with and without
grace, on one dollar or other monetary unit for such period; while the spaces
marked E, F, G; etc, may indicate the amounts of discount, with or without grace,
under certain circumstances. In the spaces d³ whenever necessary there are five
letters A, B, C, etc, the last two to represent days of discount when the intervening
February has twenty-nine days.
Below the indicator B I arrange the period table E having a row of spaces e
containing reference letters A B etc, and also spaces e¹ registering with the spaces b
and marked with the number of days of interest or of discount, with or without
grace, for the period named in the registering spaces b.
In the maturity section the letter A always applies to interest; thus on a note
at 3 days, 15 days, 45 days, etc the number of days of interest is invariable. In
the spaces d' of the maturity section registering with the spaces b of indicator B
wherein days are enumerated there are only three letters A B C etc, because in
Bills at a stated number of days the dates of maturity may vary but the number
of days for interest or discount is fixed. In the columns where months are
mentioned not only do the days of maturity change but also the number of days
of discount. Thus in a note drawn at any date in January for one month the
interest is invariable represented by letter A but the discount on such a note from
the 1st of January to the 1st of February equals 32 days without grace and 35 days
with grace, as shown by the period table under the proper letter, as indicated in
the space of the maturity section as before described. Thus it will be seen an
accountant can at a glance determine the day of maturity and grace of a bill, and
by simple multiplication can determine the amount of interest or discount. The
rollers F F and G G are journaled in the casing and provided with handles by
which they may be conveniently turned to adjust the interest and maturity table
at will. It will be understood that a note for one month bearing any date from
the 1st to the 28th of January would have 32 or 35 discount days. If dated on
the 29th it would have 31 or 34 discount days. If dated the 30th it would have
80 or 33, and if dated the 31st it would have but 29 or 32 discount days.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed I declare that what
I claim is ;
1. An apparatus for facilitating calculation comprising an indicator section,
interest and maturity sections, and a period section, substantially as set forth.
2. The combination in an apparatus substantially as described, of an indicator
section a maturity section, and an interest section such sections being divided into
spaces registering and marked substantially as set forth.
3. The combination in an apparatus for facilitating calculation, of an indicator
strip divided into spaces, and interest sections having spaces registering with those
of the indicator a maturity section having spaces registering with those of the
indicator, and the period table arranged above the maturity table substantially as
Bet forth.
4. The combination with the indicator section having marked spaces, of the
maturity table having spaces and having references marked therein, and the period
table having spaces corresponding to those of the indicator and provided with
references, substantially as and for the purposes specified.
5. An apparatus for facilitating calculation, comprising a case or support, an
indicator section, and interest, maturity, and period sections, such sections being
divided into spaces and held to the support with the spaces of one registering with
those of the others and inscribed substantially as set forth.

page_text: 6. In an apparatus for facilitating calculation, the combination of a case or
support a fixed indicator section, a fixed period table, the interest and maturity
tables and supports therefor substantially as described whereby said interest and
maturity tables may be moved or adjusted with reference to the fixed indicator
section and period table substantially as set forth.
.
7. In combination with a case or support A, an indicator section, a period
table E arranged below and separated from the indicator section, the maturity
table extended under the period table, and supports and guides for the maturity
table whereby a portion thereof is guided and exposed between the separated edges
of the indicator section and period table substantially as set forth.
8. The herein described apparatus for facilitating calculation consisting of the
case having rollers F F, G G, and guides ƒ ƒ and g g, the interest section C passed
over guides g and wound on rollers GG, the indicator section B secured close
below the lower guide g, the period table fixed below and separated from the
indicator section, and the maturity section passed over guide f and exposed
between the adjacent edges of the period table and indicator section and wound
at its ends on the rollers F F substantially as set forth.
J. V. CHARPANTIER,
'By A. M. & Wm Clark, Agents.