US942579A - Calculating device. - Google Patents

Description

G. H. MLLER.

GALGULATNG DEX/10E.

APPLICATION FILED JAN. 27, 1909. RENEWED OUT. 1G, 1909.

Patented Dec. 7, 1909,

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CHARLES MILLER, F i

CALCUL "f iilClii.

Specification of Letter Application filed January 27, 1909, Serial No. 151,420.2. Renewed Gc'tober 1S, SGS. Serial No. 523,055.

necessary to calculate the accrued intnesrl on bonds and the lil-:o 'for certain periode o? 1 time and thin work nrniahee a notable L in onths.

'hating deacer ucd i invention i rra i lines oi" months are respec` tively lated to the months of the. index colinnw '16a and are consecutively precedent to such latter menthe. For example, the top nien-th o the index column in Fig. is

, t daraarv and the tivo months of the to i 1 I Lc v row in" which correspond to the January nv intli oit the index colunin are December 7, October 7, September and whit'ch months it will be observed tive months preceding the month et 'The inonth of: the index i C February and the months i the :row .1Gb related to the second month of i: colui' i are the tive months imme- C; February.

eren?, table 'l5 is provided with 31 anionnie of interest calculated at a.

10 -arc prepared on a :sheet of paper,

ample of the urses to which nihY niay be adwintageouslv put, atthougjh the 2O use of the invention in in no wise limited tt that particular work.

My invention involves various other tures ot importance and all ot theni will be fully set. i'orth hereinafter and particu- 1 larlv pointed out in the claiine. i

Reference is now had to the accen'ipany ing drawings which illustrate, are an exain- 1 ple, the preferred inanner ot practieallj,Y enibodying` my invention.

Figure 1 is a face vie7 of the device; Fig. 2 is a` view of the month Scale or e, and Fig, 3 is an enlarged section on lines 3-3 of Fig. l.

'The body of. the device coinrn'iecs a Suitable casing 10 the front or upper of which is formed with two paraliei and 14, through the t'oi'incr et which tal e e on a given principal over the pc- I5 corresponding to the months Thiene 3i roi/ve of inten nt Si days and at the end. gares which. desivnate to which the row relater. so oi the case it), between the are indicated certain rates' ch are the saine for each ot cai columns or" months on the here shown, the rates ofin- 35 Loin 3% to 6% including 33% Gbv'iously.Ax however, the rates of may changedi as may be the rinie time without departing rom fein npute. interest. accruing in six months on thousand dollar bonds-the usual ration of municipal and industrial 95 i ies, Assuming now that on the Second day of January interest had been accruing; since September on a thousand dollar bond and the amount of that interest was to l l l l i 'l5 is visible and through the latter of ivhiei .in exposed the month table 1G. ieee tables linen i other fabric, and are wound over rollers it" i and i8 respectively. Said rollers a proi vided at one end ot the casino; l0 with spring l t the invention the instrument will be kept mainder of the surface of the month table adpisted so mat the current month m the is occupied by a number of linee i6" of 'friction devices if) which prevent idie niobe calculat 7 the nionth table Should be 100 tion. The rollers` are also provided with i turned to e pose the month @t January and knurled wheels1 2O which facilitate manually' t the interest table turned 'to expose the row rotating the rollers' in one direction or the l of figures on t ie interest table indexed other to expose through the Slots i2 and lit A fh the operi tor 'then has only 'to refer anv desired portions oi? the tables l5 and it. to part. the interest table under the 105 'The mont-hi. table 1G has at its lett hand l September" to determine the rate cud an index column 1(3"1 on which writ creat, ivhereupini the figure on thginteu. accort'ting` to the embodiment of the in. i i table under Such interest rate will give vention Shown in the drawing@ the tweive the troni September to the consecutive inontheI of the year. The Q d day-oF January. ln the practical use o l index column 1Gn of the month table will be exposed and each day the interest table should be adjusted to expose the day of the month through the slot l5. The accountant has then only to turn to the device Whereupon a mere glance will indicate the interest accrued to date from any period covered by months of the months table. Obviously, the scope of the device may be videly extended beyond that illustrated in the drawings. The example given in the drawings has been made, in the interest of clear-ness, as simple as possible. But in practice the capacity ot' the calculating device may be multiplied to any desired extent as well as may be moditied the mechanical device for n'lountii'ig and exposing or indicating particular parts of the month and interest tables.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent ot' the United States, is:

l. A calculating device having a table ivith the index column of months and rows of months respectively related to the months .of the index column, such rows being conv secutively precedent to the months of the index column to which 'they relate, an interest table calculated to amounts of interest on a given principal at a given rate for periods corresponding to the'months of the trst named table, and arranged to be read in conncction'with the months thereof and means for indicating certain parts of such tables, whereby the accrued interest on said principal from any of the precedent months of the first named table to the date may be exhibited at Will.

2. A calculating device having with openings in the face thereof, pairs of rollers mounted in the casing and adapted to lbe manually operated, a month table mounted on one of such pairs of rollers and visible in part through one of the openings in the face of the casing, such table having the index column of months and rows of months respectively related ,to the months of the index column, such rows being consecutively precedent to thev months of the index column to which they relate, and an interest table Wound over the second pair of rollers and visible in art through the second opening in the casing, the interest table having amounts of interest on a given rate for periods corresponding to the months of the first named table and arranged to be read in connection therewith, whereby the accrued interest on said principal 'from any of the precedent months of the first named table to date may be exhibited at will.

In testimony whereofv I have signed my name to this specification in the presence ot' two subscribing Witnesses.

CHARLES H. MILLER.

a casing lVitnesses ISAAC B. (DWENS, B. Breen.

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