US1787889A

US1787889A - Adding machine

Info

Publication number: US1787889A
Authority: US
Publication date: 1931-01-06
Anticipated expiration: 1948-01-06

Description

Patented Jan. 6, 19131` ,PFATENI".4v r01u-ice JOHN; H. wrrrrn, or DUNCAN; oKLAHonA ADDING MACHINE' Application mea reh'raryii, 1928. lsenin No. 253,758;

f This invention relates to adding machines and more particularly'to'a portable adding .machinehaving the form of a holder for penyC1151. f i

An important object of the invention is to provide a simple and readily manipulatable 'device which may be so constructed that it is very light and therefore not inconvenient to transport and which will be a general imm proyeinent in the art.

These and other objects Construction shown in 'the accompanying drawing, whereinfor the purpose of illus tration is showna preferredfembodiment of my il'ive'ntion and wherein Figure 1 is a side elevation of an addin machine Aconstructed in accordance ,with` my invention; l i

Figure 2 is a vertical sectional 'view there- 2o through on the line 21-2 of Figure 1;

Figure 3 is a section on the line 3-3 of Figure 1\;` Figure 4 is a diagrammatic view of the drum wallshowing the indiciaarrangement thereon.

Referring now more particularly to the drawings, the numeral 10 indicates-an outer drum having at its opposite endsa cap 11 and 'a plug 12. Theplug 12 is constructed to receive a pencil 13 or a 'short portion of a pencil. The drumhas formed in its'periphery a tation within the drum.' This cylinder has o arrang'edl thereon two number series herein after referred'to as the adding series, indi-V cated at 18, and the total series, indicatedat 19; The circumference of the cylinder is provided with ten .equal longitudinal divisions or spaces which, in the present illustration, occupy the entire circumference of the cylinder. The adding series consists of digits arranged in circumferentially vand longitudinally aligned rows in saidfspaces, the digi-ts of these rows beingserially dis- 1 attain by the posed in descending order about the circumference and serially in ascending order longitudinally kof the-cylinder. For convenience in arrangement, a Zero space 20 is `preferably disposedat the upper left hand corner of the adding series with the cylinder 16 developed, as shown `by Figure 4 and from this point in .the upper circumferential row, the numbers read from left to right9, 8, 7, 6,5, 4, 8, 2, 1 and from top to

bottom

1,2, 3, 4, 5, 6, 7, 8, 9,

Vith this as a base, the serial arrangement above vnoted is completed. The zero units are omitted, blank spaces being provided at the points where they would occur in the series andV these blankpoints will, of course, be

disposed iny line "extending: spirally about the cylinder. yAt this point, a spiral slot',in` dicated at21, is formedin the cylinder. The

total series consists of a plurality oftens series with their attendant digits asa zero tens series 22,- v'vhich consists simply of

units

0, 1, 2, 3, 4, 5, 6, 7 ,8, 9, a one tens series including the

numbers

10, 11, 12, 18, 14, 15, 16, 17,18 and 19 which is indicated at 23, etc. Each tens series has its ordinalsso arranged that its units are complementary to the units of vthe rst circumferential units row of the kadding series, with the result that in vertical rows, the numbers of the total series have the same terminal unitsas 1,11. 21, 81, 41, 51, etc. 'Y Mounted in the slot is a slide 24 having a stylus 25 engaging in the groove 21. `This slide has at its upper end a pointer 26 which coacts with a character series 27 formed along one side of the slot 15 and having a.

character forand aligned with each circumferential row of the adding series.

The slide is preferably further provided with an indicator I extending longitudinally of the` drum and longitudinally divided into spaces 28preferably defined by forming these surfaces as ratchet teeth. Each surface has an'identifying characteristic 29 referring to one of the`circumferential rows of the total series 19. 1f desired, the margin of the slot in alignment with the total series may be provided Ywith similar identifying characteristics,` asindicated at 30. The characteristics of the" indicator I are serially arranged.

The operation of the, deviceis as follows:

To begin an adding operation, the operator places his thumb upon the uppermost indicat ing space 28 of the slide indicator and posi-- tions the slide at the upper limit of its travel, at which time opposite the zero graduation of the indicating series 39 a zero will appear in the row 22 of the total series 19 and the machine is cleared. Assuming that the numbers to be added are units 2, 9, Ll, 7, and 8, the operation is as follows: The vertical column appearing in the slot is inspected to find the unit 2 of the vertical row of the adding series which appears therein. This unit is opposite the character C of index 27 with which the pointer of the slide coacts. The pointer is accordingly moved to the character C. At this time, opposite the zero graduation of the index 30 which corresponds to the graduation 29 of the indicator I engaged by the operators thumb, the character 2 will appear in the slot. In adding the next number 9, the slot is again inspected to find the unit 9 of the row of the adding series appearing in thel slot. This is found to be opposite g; the character B. The pointer is accordingly moved upwardly but before moving the pointer upwardly, the operator moves his thumb downwardly one notch on the indicator I. After these movements have been completed, the sum is read opposite the character 1 of the index 30 which corresponds to the vcharacter of the indicator I now engaged by the thumb of the operator and appears as 11. Following the course above indicated, to

rs add the next number, it is found that 4 appears opposite the character F of the index 27, so that the pointer is moved downwardly and no change in the position of the thumb of the operator takes place. Accordingly, when the movement of the pointer is completed, the total is still read in row 1 and appears as 15. For the next number which is found to be Vopposite the character C of the index 27, it is again necesary to move the ,.5 pointer upwardly, so that the thumb of the operator is again shifted and the total read as 22 in the total series opposite the character 2 of the index 30. Adding the next number 8, this condition again occurs, as the pointer must be moved upwardly to the character A, so that the thumb of the operator is again shifted and the total read opposite 3 of the index 30 and appears as 30.

When two-digit numbers are to be added,

Y' such for instance as 12, 10 and 20, the machine is first cleared by moving the pointer 26 to the character A of the index 27. The first vertical column of the adding series 18 and the corresponding columns of total series 19 as viewed in Figure t and counting from left to right, are now in registration with the slot 15 of the drum 10. The index 27 is inspected to ascertain the character thereof appearing opposite the digit 2 of the rst ver- 'F tical column of the adding series 18, this digit corresponding to the second digit of the numeral 12, and this character being the letter C. The pointer 26 is moved to the character C of the index 27 with the thumb on the character 1 of the indicator I, the character 1 corresponding to the first digit of the number 12. The third vertical column of the total series 19 is moved into registration with the slot 15 of the drum 10, as the result of this movement of the pointer 26. The character lof the indicator I, also corresponds to t-he character 1 of the index 30 opposite which character of the index appears the number 12 of the third vertical column of the total series 19. As the first digit of the number 10 is 1, the thumb is moved one space downwardly on the indicator I, the thumb being now on the character 2 of the indicator. This character corresponds to the character 2 of the index 30, and the number 22, representing the total of the

numbers

12 and 10, of the third vertical column of the total series 19 appears opposite this character. As the first digit of the number is 2, the thumb is moved downwardly two spaces on the indicator I, the thumb being now on the character 4C of the indicator I. This character corresponds to the character el of the index 30 opposite which appears the number 42, the total sought, of the third vertical column of the total series 19.

It will be obvious that the device may not only be very cheaply and readily produced, but provides a novel and efficient means for adding small sums. It will also be obvious that the construction hereinbefore set forth is capable of a. certain range of change and modification without materially departing from the spirit of the invention and I accordn ingly do not limit myself to such specific structure except as hereinafter claimed.

I claim 1. In an adding machine, a drum provided with a longitudinal slot and with a longitudinal index at one side of the slot, a cylinder I rotatably mounted in the drum and provided with an adding series of numbers and a total series of numbers, one of said series being arranged above the other and a row of each series registering with the slot of the drum, a slide mounted in said slot for movement in opposite directions longitudinally with respect to the adding series and into registration with the several numbers of said series that are to be added, means connecting the slide to the drum to permit the movement of the slide to turn the drum, and an indicator fixed to the slide and extending longitudinally of the drum, the indicator providing means by which the slide may be moved by the linger and provided with an index similar to said first index, the character at one end of the indicator being covered by the finger during the initial movement of the slide and the finger being moved on the indi- I-Bii for each movement of the slide in one direction, Aand the character of said first index corresponding to the one covered by the finger after the final movement of the slide indicating in the total series the sum of the numbers added.

2. In an adding machine, a drum provided with a longitudinal slotand with a longitudinal index at one side of the slot, a cylinder rotatably mounted in the drum and provided With an adding series of numbers and a total series of numbers, one of said series being arranged above the other and a rovv of each series registering with the slot of the drum, a slide mounted in said slot for movement in opposite directions longitudinally With respect to the adding series and into registration with the several numbers of said series that are to be added, thecylinder being provided With a spiral groove bisecting the adding series, ak stylus carried by the slide of for each movement of the slide in one direction, and the character of said first index corresponding to the one covered by the finger after the final movement of the slide indicating in the total series the sum of the numbers added, the drum being provided with a longitudinal index at one side of the slot, and a pointer carried by the slide, said last index and pointer facilitating the movement of the slide into registration with those movements of theadding seriesto be added.

In testimony whereof I hereunto aix my signature.

JOHN H. WHITE.

and iitting in the groove to permit the movement of the slide to turn the drum, and an indicator fixed to the slide and extending longitudinally of the drum, the indicator providing means by which the slide may be moved by the finger and provided vvithan index similar to said first index, the character at one end of the indicator being covered by the finger during the initial movement of the slide and the nger being moved on the indicator in the direction of the other end thereof for each movement of the slide in one direction, and the character of said first index corresponding to the one covered by the finger after the final movement of the slide indicating in the total series the sum of the numbers added. f

3. In an adding machine, a drum provided With a longitudinal slot and With a longitudinal index at one side of the slot, a cylinder rotatably mounted in the drum and provided vvith an adding series of numbers and a total series of numbers, one of said series being arranged above the other and a rovv of each series registering With the slot of thel drum, a slide mounted in said slot for movement in opposite directionsy longitudinally with respect to the adding series and into registration With the several numbers of said series that are to be added, the cylinder being provided with a spiral groove bisecting the addingseries, a stylus carried by the slide and fitting in the .groove to permit the movement vof the slide to turn the drum, an indicator fixed to the slide and extending longitudinally of the drum, the indicator providing means by which the slide may be moved by the finger and provided With an index simi-v lar to said first index, the character at one end of the indicator being covered by kthe finger during the initial movement of the slide and the linger being moved on the indicator in the direction of the other end there-