US1136797A - Calculating-machine. - Google Patents

Description

y A. DJHAfRMoN.

CALCULATING MACHINE. @APPLICATION FII; EB NOV. 9. I9I4.

1,136,797.' Y Pwnted Apr, 2o, 1915.

6' 'f y' Z o .4( ol/ o Z y 4 @wozu/hoz y aat, l i l 1 To 'all whom may concern ALTON D. HARMON, 0F CilllfBlEl-I)GEy SPRINGS, PENNSYLVANIA.

ALCULATINQMAGHINE.

v specification of Letters Patent.

Application ledNovemberrS, 1914. Serial No. 871,125.

Be it known that I, AL'roN D.'V HARMON, a citizen `of the United States, residing at Cambridge Springs, in the` county of Crawford and State of Pennsylvania, vented certain new and useful Improvements in Calculating-Machines; and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled inthe art to'which it appertains to make and use the same.

" soy This invention'relates to calculating machines, for adding and subtractingnumerals, which are provided with tablets and slides;

andA it conslsts in the novel construction and ycombination of the parts hereinafter fully described'and claimed. p

In the drawings, Figure l is a front view of a calculating machine constructed according'to this invention. Fig. Q'is a cross section through the machine, taken on the line m-w in Fig. 1. F of the back plate ofthe machine. Fig. l is a front view of-one of the slides. Fig. 5 is a Ilongitudinal section through the ma-L chine, taken ,on the line y--y in Fig. 1. Fig.

6 is a detail view of one of the carryingk signals.

The machine has a series of ribs b which project upwardly from it. These ribs are arrangedl parallel to each other, and preferably atequal distancesVY apart, and their. ends. b serve as stops" for the slides.

.The slides C haveslots c in their backs which slide over ltherlbs b with very little* friction, and stops c are formed at the ends of Ltheslots for coming in contact withthe stops b ofthe ribs tto prevent* the slides v4from'being slid 'out of the frame and being lost.

vided, and six' similar slides are shown, an

are numbered from 1 to 6 consecutively from right to leftQY Each slide has a rowof 18 stylus holes ,dA and d A ranged at equal distances 9 holes d are blackened portion D of the slide to distinguish them froml the upper nine `holes al',

- but theV slide `may be' otherwisemarked mi any convenient manner to distinguish beA the two series'of'holes cZVand d.

tween The'holes d and yd are 'arranged on one 'have in-v 'g. 3`is a detail view" tablet or frame vvthe.` back plate B ofwhich is provided with a Any' convenient number of slides (lis'pro-lA formed'in 1t and ar-i apart. 'The ,lowerI formed 1n a" shaded'A or` Patented Apnao, 1915.`

. side portion of the slide, and Aits other-side" i portion is provided with a row- 'of index numerals E, from 0 to 9` inclusive. pThese lnumerals are arranged at'the same distances apart as the stylus holes, the numeral 2 be#v ing' arranged opposite the bottom stylus hole -of the series d.

. is .the faceplate/ ofthe'tabletlor frame A, which is secured to the back plate B inany` approved way, and which extends over vall' the slides. In ,the device illustrated, theback plate has projecting pillars f on its face, and theface vp late is secured to these pillars by screwsfgfv- 'f The face plate has a series ofparallel slots g, corresponding to the slides 1'to6,

. and arranged so as to'A eXpose'. the stylus."`

holes inthe slides.y The ends g of the slots g form stops 'for the stylus or other .similarv instrument which yis inserted in the stylusA holes and is operated so as to movethe slides longitudinally.- The face plate has afseries of sight holes tom ends of its slots, andr arranged in line with the index numerals E ,on the slides.

rThese sight holes are positioned sothat, l 'when the cipher 0 onV each. slideis visible` through the sight [hole pertaining tothe` rslide,vtheA lowest stylus holeof the series d' is oppositefthefknumeral 1 ofaseries of numerals l ymarked fon-,the face plate. Y Eachv slot has `aA series ofnumerals each series are arranged at the `same. dis# tancesk apart as the stylus holesi'nthe slidesand the index' numerals E.

h formed in it below `the bot? ,A

J, 1 tuainelusive, markedon it and the numerals of]` f The upper and lower ends)` of thelface plate i f have flangesc which project forwardly and yform handleswhich are convenient in ,using vthe machine. ,The ffaceplate is formed' of thin resilientsheet "Ine-tal or other material y,

holes `of the slides;

1. f which will spring a little, and indentations n are formed in it for engaging I.with the stylus Theseyindentations are.; preferably pressed in the sheet. metal plate.

at the upper ends lof* theslots, butfany other,l

approved ,means may be provided for checking the free movement ofthe slides interf g mittently, and -obliging small 'amount of ,l force to be 'usedfto manipulate thenisol05 that they vdo notv slide accident-allyA when the machine is tilted, lo'rrymoved about: ,These ections engage I automatically spring g proj jwith 'the stylus lioles.--"\ g A A). ICarrying signals arel provided, and asimif ric lar carryinglsignal is secure-d behind each The upper lever p has teethvlt and t which project .laterally from opposite sides of its top end. rI`-he -lower lever has a tooth w which projectsfro-m the left hand side of its bottom end. Fig. l6 shows the signal its normal position, the tooth t projecting crosswiseof the top of the righthand slot in the path of the stylus, and the teeth t and w being concealed behind the'bar :of the face plate, which is shown in ldotted lines.

The end portion of the st lus is made of a suitable shape to operate t e teeth, aswell as to engage with the stylus holes. The teeth t and fw are signal teeth, and when the stylus is moved to the top of the slot and operates th'e tooth t', it turns the levers on their pivots .and exposes the signal teeth t and 'w at l the top and bottom of the adjacent left hand slot. -When the next slide to the left is moved to register the carrying numerall, the stylus strikes the'tooth-w and restores 'the signal to its normal position'.` v l The machine may be used-both for adding and for subtracting, and as -a sample of its- Ause for adding, suppose the numerals 7, 21, and 508 are to be added together. The slides are first placed `in the zero position, as vshown,

in Fig. 11. The first numeral 7 is registered by inserting a stylus in the stylus hole of slide N o. 1 which is'opposite the numeral 7 adjacent to said slide on the face plate, and moving the slide downwa-rdly'until. the stylus strikes the bottom end of the slot. .Thiswill cause the numeral 7. on the slide tobe eX- `posed at the left hand sighthole.v When the stylus hole to.. be used is in the series'of stylus holes d and in the shaded or blackenedgporton of the slide, the .slide must always be moved downwardly; but when the appropriate stylus hole .is-.in the series d vand inthe white portion of the slide, the

slide is moved upwardly. Each time a slide .is moved upwardly, lmust be added by I. means of the next left hand slide.

. Thenumeral 21 is added byregisterngthe 2 with slide No. 2, and the 1 with'slide- No. l, in a similar manner to the 7, so that 28 appearsatthe sight holes.

The 508 is added by registering the 5 with the slide No. 3. `The cipher 0 `does not re- 1 -quire to be registered, and the 8 is registered A series' of slides movable longitudinally in the frame and provided with stylus vholes lwith slide No. 1. As the appropriate stylus hole for registering 8 isjin series d in the` White part of the slide, the slide is moved .stylus at the other end of .'lihpwardly until the stylus'strikes the tdi-)p lld' ofptheslot and operates the signal. The necessary 1 is added. by moving slide N o. 2 with the'stylus, the stylus being inserted in f the stylus hol'e opposite the numeral 1, and thev slide being moved downwardly, and thereby resetting the signal to its normal .poef 1 .sition. This will cause 586 to appear at the sight holes, which is the correct sum of the numerals 7 21, and 508.

Other numerals are added in `a similar` lmanner, and subtraction can be e'ected by operating'thev machine in .ausomewhat reversely similar way. vThe signals show automatically when carrying numbers are to to be manipulated.

What I claim is:

be added, and valso indicate/the correct slide y 1. In a calculating machine, the combinai l i tion, with a frame provided with a back plate having a seriesA of parallel projecting ribs, and a numbered 'face .plate provided with slots and` sight "hole=; of a series of 'y slidesprovided with slots theirbacks which engage with and slide upon the 'said ribs, said slides being supported upon the said ribs out of contactwith the lsaid baek t also provided with indexnumeralsi arranged behind the bars of the face plate and in line with the sight holes. v

' 2. In a calculating machine, the combina--v vided with parallel slots, and slides. movable in the frame and provided with stylus holes; of a'carrying signal pivoted under the face view at one end portionof one slot when the the other end portion of the other slot. j 3. In a calculating machine, the combination, with aframe provided with a face plate having parallel slots and'bars, .of a series ofl sli des movable longitudinally in the frameA plate and with each other, said slides being y tion, with a frame having a -face plate proios other projection is moved by the stylus at e and provided with stylus holes arranged be- Y hind theslotsf and numerals arranged behind .the said bars, and signal levers arranged in pairs with, their adjacent ends articulated, said signal levers being pivoted behind the said bars and ,provided with teeth at their opposite end vportions adapted to project crosswise of the end' portions of the slots,

a signal-being displayed at one end of one slot eachy time a lever is operated' by the the adjacent right hand slot.

` 4.-. a calculating machine, the combination, with a frame provided with a face plate having parallel slots and bars, of a arranged behind the slots and numerals 'arranged behind the eaid bars, signal levers arranged in pairs and .having their middle parts pivoted behind thesaid bars, the ad jacent ends of eachv pair of levers beingrartieulated to' ther,` and their opposite ends being vprovi ed with teeth adapted to pro? ject crosswise'of the end portions of the slots, asignal being 'displayed in one slot each time a lever is operated bythe stylus 1o -at one end of the adjacent right hand slot.l

In'testimony whereof I have aiixed my signature inY the .presence of two witnesses. ALTON D. HARMON.

Witnesses: C; (Sr` FINNEY,

W. B. SHERMAN.

Images