US446753A

US446753A - jewett

Info

Publication number: US446753A
Authority: US
Publication date: 1891-02-17
Anticipated expiration: 1908-02-17

Description

(No Model.)

E. F. JEWETT.

ADDING MACHINE.

10.446,753. Patented Peb. 17,1891.

A TTOHNEYS UNITED STATES PATENT OEEICE.

ERI l". JEWETT, OF Nll\\"l`O\VN, OlllO, ASSIGNOR, DY MESNE ASSTGNMENTS, TO PERCY L. JFVFTT, OF SAME PLACE.

ADDlNG-MACHlNE.

SPECIFICATION forming part of Letters Patent No. 446,753, dated February 17', 1891.

Application filed April 23, 1890. Serial No. 349,068. (No model.)

To @ZZ 2071/071@ if may concern:

De it known that l, ERI F. JEWETT, of Newtown, in the county of Hamilton and State of Ohio, have invented a new andL Improved Adding-lllzichine, of which the following is a full, clear, and exact description.

)ly invention relates to improvements in adding-machines; and the object of my invention is to produce a machine by means of to which numbers niay be rapidly and accurately added or subtracted in a mechanical manner requiring little mental process.

To this end my invention consists in certain features of construction and combinations of parts, which will be hereinafter fully described, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate 2o corresponding parts in all the figures.

Figure lis a front elevation of the machine as arranged for adding, Fig. i), a front elevation, partly in section, with a portion broken away to show the tapes and with the machine arranged for subtracting, and Fig. 3 a vertical cross-section on the line n; of Fig. l.

The hollow case A, which is preferably rectangular in form, constitutes the frame of the machine, and fixed in the upper and lower 3o portions of the case, respectively, are the horizontal shafts i3 and B, having loosely mounted thereon a series ot similar independent pulleys C, with ten pins d projecting from the faces thereof, and with every tenth pin a upon the upper pulleys longer than the rest.

The pins are spaced regularly upon the pulleys C, and each pulley on the shaft D aligns with a corresponding pulley on the shaft i3'.

Fixed 'in the case A below the shaft D is a 4o horizontal bar D, extending across the case, being fixed in position by the screws l), which project through the sides of the case and into the ends of the bar, Fixed to the front side of the bar D is a plate D', which fills the front central portion of the case A, and in the front surface of which are cut ten shallow grooves D2, corresponding in their position and direction with the slots in the plates ll and card .T. The grooves guide the point 5c of the pencil or instrument for moving said parts. The plate D' serves as a table to prevent the numbered tapes from being pressed too far inward when the device is operated. Attached to the back side of the bar D are the upwardly-extending tongues (l, there being as many tongues less one as there are pulleys C on the shaft l. lhe tongues align with the pulleys and extend just near enough thereto to permit the pins c to pass and to engage the longer pins c', which will strike the tongues when the pulleys are revolved, thus producing a ringing sound and warning the operator that there is one to carry, as described below.

Extending over the pulleys O are the endless tapes E, having perforations e to fit the pins of the pulleys, and perforations c', by means of which the tapes are moved, and having'spaced regularly thereon three or more consecutive series of numerals from O to 9. The numerals on the tapes E are only visible one at a time as they appear in the transverse slot F in the face of the case A. A plate ll, having longitudinal slotsf therein, is fixed in the front of the case A, and the slots are arranged to be opposite the perforations c in the tapes E, so that a pointed instrument may be inserted in said perforations and the tapes moved. ln the vertical bars Il' of the plate ll are a series of holes g, spaced regnlarl-y and arranged one above the other, there being ten holes in each bar. The bars Il' are in line with the tapes E, and between the tapes and the plate ll is a card J, having a perforation 7i. in the lower part thereof opposite the slot 7i in the face of the case A, and by means of which the card may be moved vertically. The card has longitudinal slots j therein, corresponding to the slots f in the plate ll, and vertical bars J", between the slots, corresponding to the vertical bars ll of the plate ll. The bars J will thus be concealed by the bars F', except the parts which show through the holes g of the bars H'. The bars J have printed thereon two series of numerals from 0 to El, as shown in Fig. i?, the numbers alternating and one series reading from top to bottom and the other from bottom to top, and two numerals, one of each series, corresponding in position with a numeral on the tapes E, so that by moving the' card .I either series may be brought opposite the holes g. The numerals reading from bottom to top arc displayed when the machine is used for adding and the opposite series when the machine is used for subtracting. The different series l of numerals should be printed in differentcolored ink to make the distinction more noticeable. The right-hand column of numer- IO als represents units, the next tens, the next hundreds, and so on, as in ordinary notation. The machine is operated as follows: If the machine is to be used for adding, a pointed instrumement-such, for instance, as a lead- I5 pencil-is inserted in the perforation h and the card J moved to bring the numerals opposite the holes g in the bars ll in such a manner that they will read from bottom to top, and the tapes E are turned by inserting zo the pencil in the perforations e,so that a row of ciphers will appear in the slot F. We will suppose that the three numbers 223, 179, and 8&5 are to be added. Beginning with the figure in the units-,column of the last number 5 the 2 5 operator places his pencil in a perforation e of the tape E opposite the numeral as displayed in the right-hand or units column on the machine, and moves the pencil and tape to the bottom of the slot f. This causes the 3o numeral 5 to appear in the units-column of the slot F. The pencil is then placed in a perforation of the tape opposite the'numeral 9, that 'being the next numeral to be added, and the tape drawn to the bottom of the slot f,.as before, and this causes the numeral il to appear in the units-column of the slot F; but the right-hand pulley will have completed a revolution during this last movement and the pin a will have struck a tongue d, warning the operator that there is one to carry. The pencil is therefore inserted in a perforation of the tape opposite the Fig.1 in the tens-column and the tape and pencil moved to the bottom of the slot f, and this causes the numeral l to appear'in the tens-column of the slot F. The operator then inserts the pencil opposite the numeral 3 in the units-column of the machine, and the tape and pencil are again carried to the bottom of the slot f,-thus causing the numeral 7 to appear in the unitscolumn of the slot F. The numerals 4f, 7, and .2 being the numerals 'in the tens-column of the numbers to be added, are then added in the tens-column of the machine in the ,man- 5 5 ner described, the amount to carry transferred to the hundreds-column of the machine, and l the hundreds are added in the same way, and the final result 1,247 will appear in the slot F.

It will be readily seen that as each tape and 6o set of pulleys kare independent from the others the operation may be carried on indefinitely, being only limited by .the number of tapes vand corresponding parts in the machine. i To subtract, the above process is reversed, I 6-5 the, card J 1s moved upwardly, so that the.

numeralsin the holes gwill read from top to bottom, and instead of the row of ciphers in als produced thereon, and a slotted-and apg the slot F the minuend is made to appear in the right-hand side of the slot. 'lhe operator then places his pencil in the perforations of 7o the tapes opposite the numerals of the units, tens, &c., corresponding to the numerals in similar columns of the subtrahend, and moves the tapes upwardly, carrying as in addition, but upwardly, and the remainder appears in the slot F. A

Byhaving the parts arranged as described the machine will be perfectly accurate in its work, and with a little practice a person may operate it with great facility. So

I have shown the machine as arranged for a small device; but in larger machines, for school use, projecting buttons maybe substituted for the perforatious e and h, and the tongues d may be substituted by levers and made to-strike a gong or bell.

Having thus described my invention, what I claim as new, and desireto secure by Letters Patent, is

l. An adding-machine consisting, essentially, of a case having a transverse slot therein and having two horizontal shafts fixed therein, pin-pulleys mounted on said shafts so that the pulleys on the upper and lower shafts will align, endless tapes extending over said pulleys, having series of digits and ciphers thereon, a vertically-movable card having longitudinal slots therein, said card being arranged between the tapes and the front plate of the case and having a double series of digits arranged oppositely thereon between each ofthe slots in the card,.and a longitudcally-slotted plate fixed tothe front roc , of the case, so as to cover the card,said plate having ten holes between each pair of slots, through which the digits on the card maybe seen, substantially as described.

2. In an adding-machine, the combination, with a .case having a slot and a series of tapes having numerals vconsecutively produced thereon, of a card having two series .of nue merals oppositely and alternately produced thereon, and an apertured plate, all arranged for operation substantially as set forth.

3. In an adding-machine, the combination, with a case having a slot, a series .of endless tapes having numerals produced consecutively thereon, and a slotted and apertured plate, of a slotted card having two series `of oppositely and alternately arranged numerals produced thereon, all arranged for opera tion substantially as set forth.

4. In an adding-machine, the combination, with a case having a slot, a series of endless tapes having numerals produced consecutively thereon and provided with a series of apertures, and pulleys having projecting pins adapted to engage the tape-apertures, of an adjustable slotted card having two series of oppositely and alternately arranged numer- IIO e-rtured plate, all arranged foi-.operation sub stantially asset forth. 5. In an adding-machine, the combination,

with a case having a slot, a series ot endless tapes having numerals produced eonseeutively thereon and. provided with a series ot apertures, and sets of pulleys having projecting pins, one of which on one pulley of each set is longer than the others, of an adjustable slotted eard having two series ol' oppositely and alternately arranged numerals produced thereon, a slotted and apertured plate, and an alarm in the path of said long pin, all arranged tor operation substantially as set forth.

i5. In an adding-machine, the combination, with a case having a slot, a series et endless tapes having numerals produced consecutively thereon and provided with a series of apertures, and means for operating the tapes, and sets of pulleys having projecting pins, one of which on one pulley of each set is longer than the others, of an adjustable slotted card having two series ot' oppositely and alternately arranged numerals produced thereon, two of whichone ot' each series-occupy the space of a numeral on the tapes, and the slots of which are in line with the operating means of the tapes, a slotted and apertured plate the apertures of which align transversely the operating means of the tapes and the slots ot' which align the slots in the card, and an alarm in the path of the long pin aforesaid, all arranged for operation substantially as set forth.

7. In an adding-machine, the combination, with the tape-carrying pulleys having projecting pinsin their faces, with one pin in one pulley longer than the rest, of metal tongues arranged to engage said long pin at each revolution ot the pulleys, substantially as set forth.

S. The combination, with a longitudinallymovable slotted Card having the nine digits and cipher arranged oppositely thereon between the slots, ot' a slotted plate to cover the card, said plate having holes between the slots, in which each series ol digits on the card may be made to appear, substantially as described, and for the purpose speeitied.

il. An adding-machine consisting, essentially, of a ease A, having aslot F and shafts IE B therein, the pulleys C, mounted on the shafts and having pins a uf, the tapes E,hav ing perforations e and c and having three or more series of digits and eiphers thereon, the card J, having slots j and having opposite series of digits and eiphers, as shown, and the plate Il, having slots f and holes g therein, substantially as described.

IO. The combination, with the ease A,having slots F and h', the shafts B and B', the pulleys C thereon, and the tapes E upon said pulleys, of the card J, having the slots j and oppositely-arranged digits and eiphers, as shown, and having a perforation 7L, by means ot which it is moved, and the plate H, having slots f and holes g therein, substantially as described.

Il. The combination, with the case A and tapes E, arranged within the ease as shown, ot' the bar D and grooved table or plate D substantially as described.

ERI F. JEWETT.

Witnesses:

ISAAC DEAL, S. B. DEAL.