US1517858A - odhner - Google Patents

Description

Dec, 2 1924. 1,517,858

v. J. ODHNER CALCULATING MACHINE Filed Jan. 22, 1921 5 Sheets-Sheet 1 I121; gna

mac. 2, 1924, 1,51?,858

v. J. ODHNER CALCULATING MACHINE Filed Jan. 22, 1921 3 Sheets-Sheet 3 Patented 5, 319ml.

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oanoons'rine iii-seams Application filed January 22, 1921. Serial No. 339,268.

T all whom it may, concern:

"Be it known that I, Vsnszrrm Janos Onnn'nn, a subject of the King of Sweden, and resident of Rasunda, near Stockholm, in the Kingdom e1 Sweden, have invented certain new and useful Improvements in Calculating Machines, of which the tollowing is a specification, reference being had therein to the accompanying drawings.

T he present invention relates to a mechanism for such calculatingmachines, which are provided with rotary adjusting discs with movable teeth, which may be shifted by means of rotary cam-discs or the like, provided with teeth or the like and which may be brought into engagement with respective movable racks, provided with teeth or the like, and the object of said mechanism is to make such machines as easily managed and. above all as dependable as possible. According to my lnvention the racks may be moved in their longitudinal direction in a guide-way in each arm, which arm, independent of the other arms, is mounted for swinging movement about a suitable pivot, so that each rack may be separately brought into engagement with the corresponding cam-disc or respectively advanced for shifting the cam-disc and the teeth. The mechanism includes also a mechanism for bringing the cam-disc's, etc., back to their initial position and a mechanism by means of which the openingsin the niachinecasing for reading otl the figures indicating the number of the advanced teeth, may be brought near to the openings in which the result is read oil, inorder' quickly to attain a dependable survey. All the mechanisms are, according to my in vention, so combined with each other that the whole arrangen'ient may work in an absolutely reliable way.

ln the accompanying drawings is shown a convenient embodiment of my invention. Univ that much of the calculating machine is shown as is necessary to explain the invention. Fig. 1 is a side view of one of the adjusting discs with its adjustin i' IllQClltUilSlIl. Fig. 2 is a. front view of the machine with a portion of the casing broken away. Figs. 3, 5, 6 and show certain details and Fig. i is a side view of an adjusting disc with its adjusting mechanism in active position.

In the drawings 1 indicates the adjusting discs with their teeth 2. The adjustins discs are fastened to an axle 4c, journalled in the casing 3, said axle being rotated as usually with a crank. 5 indicates the cam-discs for adjusting the teeth, said cam-discsbeing rotatable on the shaft 1 and provided with slots (3. The cam-disc 5 is locked in a known way by means of a spring operated hook, which engages teeth on the cam-disc. This locking mechanism is however not shown inthe drawing. The disc 5 is provided with teeth 7. In front of each adjusting disc is provided an arm 8, which is turnabie on a pivot 9 in the lower portion of the standard. This arm is made of two parallel pieces of the same form, which are kept together at some dis tance alongside each other bv means of a cross-piece 10 and pins 11. in the opening between the two side-pieces of the arm the rack 12 is placed, in such a Way, that it may be moved all along the arm, being; guided by said side pieces and pins 13,

which are driven through the arm. and

which slide in slots 14 in the side pieces. In the upper end of the rack is a slot, corresponding to the crosspiece 10, in order that the rack should be able to occupy its highestv position without being hindered by the crosspiece. The rack is arranged to be brought into engagement with the teeth 7 on the cam-disc.

The rack can be shifted by means ot a crosspiece 15, which extends from the rack through a slot 16 in the casing and the free end of which. is formed as a handle. The rack 12 is held in its inactive position by means of a spring 17, which operates upon the arm 8, and that edge of the rack, which is turned towards the casing is provided with a number oi? equally sp acet notches 18, which are adapted to cooperate with a stop in the form of a pin 19 which is provided in the casing in order to lock the rack after each adjustment, determined by the number of the advanced teeth.

The figures for reading ed the number the advanced teeth are provided on a bio band. of steel which is attached the upper end oithe rack and which runs hetween .two guiding rollers 21 in the arm 3 and through a. slot 23 prouided in a. fixed round or nearly round member 22, the fig; ares 01" the band being visible through an opening in the casing. The band is sufficiently ilexihle to permit it to slide through the slot' 23 at the upward and downward .nient oi the rack, but at the same time :o suliiciently rigid to prevent itfrom {ling or folding between the rollers 21 the point where it enters the said slot, id for this reason the band will uniformfollow the movement of the rack in its itircty. Consequently, just the figure 'l ich (.OIlGSPOlMlS in eacii separate case to g osition oi. the rack ill be visible in ooening Q l. The member which is nari supported in. the upper portion 1. case 3 near to figure-discs (not shown in the drawing) is provided with as many slots as there are set-discs in the machine. Each slot is provided with lateral guide flanges 25 and the portion of the slot lying behind and below the opening 24: is covered by a. cover plate 26. By means oi the above descriltied arrangement for rnoviug the figures the advantage isgained that. the openings in the casing for these figures may be provided near to the openings where result of the calculating operation is d oil, whereby a survey oil all openings r the figures is quickly and roliablyl obtained.

Fi 5 and l show a nioditied arrangetal-cinr up the figure-blunts. Ac cording to this arrangement the one end of the hand is fastened to a disc :37. which is ably placed. on an axle 28. which is it'oi'iarily supported in the casing 33. disc is keptin its given position on in by means of discs 2f) attached to 4 said axle. The hand is rolled the disc against the actioi'i oping 29*, connected with the Jasi-ened to the disc 29. v described adjusting mechanism as .tollows. l i hcn adjusting the i of the disc 1, a. linger is pressed down- .n'ds against the handle 15. Because the .ortic-n 30 which at the. top bounds the lowest notch 18 in the rack 12 is bevelled 0a upwards a wedge, the arm. is swung inwai against the action ol the spring l7, so that the rack will engage the teeth 7 of the canrdisi: and. at the same time the reel:

moved downwards. llvidently the mechanism must he so adjusted that the late a IWVQllQQl'lti oi the rack in the beginning er than its vertical movement. that cajl'enient may not be rendered im- Alter th s is done is only arc to move tb' ,i-a-clt downwards while pressing ightly inwards in order to get the desired number of teeth of the setdisc 1 advanced, which number at the same time is read oil in the opening 2%. To each position of the cam-disc 5 relative to the teeth 2 corresponds a. notch 18 in the rack and a figure on the hand 20. The movement of the rack inwards is limited by a projection 31 on the handle 15 which projection when the rack is shifted slides along the casing at the side of the slot 16. The movement of the rack-up and down is limited by the slots .4 and the pins 123. Evidently the rack cannot be moved unless it is swung forward, so that the pin. 18) is disengaged from the slot which catches the pin and the rack is engaged with the teeth 7. Any movement of the rack when it is disengaged from the teeth, well as its disenghgmnent in a position, which corresponds to a tooth not fully advanced. can not take place. As soon as the desired number of teeth are advanced the handle 15 is disengaged and the 210k is automatically swung; back acted upon by the slums 17 in order not to prevent the successive rotation of the adjusting discs.

In order to prevent any wrong adjustment it is convenient to retract all the adjusting disys l, and the racks 12 to the initial position in'nnediately after each calculating operation. For this purpose a rotatable roll 32 is journallcd under and alongside the adjusting discs and said roll is opposite each cam-disc. 5 provided with a toothed segment around the greatest portion of its periphery. When the roll is rotated these toothed segments will engage the teeth of the corresprmding cam-discs 5 as soon as they do not hold their initial position. The roll is rotated "for example with a winged nut 3%. The number of the teeth of the segments 33 is so chosen, that the engagement between the teeth of the segments and the cam-discs will cease. at the same in stunt the canrdiscs occupy their initial position. Thus the segments will not pre ent the rotation of the adjusting discs. In order that the cam-discs 5 should take along with them respective racks when they return to the initial position the machine is provided with a member, formed as a movable bar 35, which is located alongside the arms, and by automatically operating the latter, when the roll is rotated each rack 12 will be brought into engagement with the corresponding cam-disc 5 before being retracted. Said bar 35 is movable arouid two pivots in the machine 00 standard which are provided in arms 37 19;. 3) pro ecting "from the bar. The bar 1; fi'irthermore provided with another arm "5 tl d f Q on iie opposite side, one lite on 0 which isprovlded with a friction-roller 39. This roller is pressed against the roll 32 by means aspring 40, which is fastened to the bar and to a pin 41 located above the disc 1.

' camdiscs c bar. A smaller arm 42 extends from the arm 8 and the arm 42 is located under the bar and maybe brought to engage a projection 43 located at the underside of the bar. That portion of the roll 32 over which the roller 39 slides when the roll is rotated, is provided with a depression or recess at to partially receive the roller 39 and in which the roller is held by means of the spring when the roll is not operated. This mechanism is so arranged that when the arm 4,-2- rests against the projection 43, the-rack is in inactive position, locked by "the pin 19. As soon as the roll 32 is rotated, which is done by means of the winged not in the direction of the arrow, in order to bring the cam-discs etc. back. to them initial position, the roller 39 is brought out of the recess 44, the bar is swung down, depressing the arm 42 and bringing the rack 12 into engagement with the teeth 7. The roll 32 constitutes a cam which, during r0 'tation operates against the roller 39. Instead of the above mentioned portion of the roll a special cam-disc of the same form and attached to the shaft of the roll-may be used. All the toothed segments 83 occupy such a position relative to'the recess .4 that the bar is completely depressed, and the rack 12 engages the teeth 7 before the toothed segments engage the same. Fig. 4 shows the operation of the adjusting mechanism. The rack is in that position, which corresponds to three advanced teeth.

In order to prevent the shifting or move ment of the racks 12 into, mesh with the gear teeth 7 unless the set-discs l with the are in the zero-position, the machine is provided with. another bar 46, which is jonrnalled between the arms 37 of the bar 35. Said bar 4% is provided with a number of arms at corresponding to the number of adjusting discs, which arms extend for some distance below the bar 35 and end about opposite the respective projections 43, so that the end of each arm 42 will be located between the projection 43 and the arm 47. By means of a spring 48 all the arms 47 are pressed against respective arms 42 Another arm 48 extends from the opposite side of the bar and the end of this arm is bentto form a hook' 49, whichin a certain position is adapted to enter a notch in a round disc 51, 1'0- tatably supported at the side of the one extreme adjusting disc 1. This disc is by means of two'gears 52, 53, which engage each other, connected with the shaft 4, so that this movement is transferred to the the same number of teeth." If the hook 49 is brought into enga 'ement with the cess50 of disc 51, which can be doneonly Both the gears 52 and 53 have' dentiy locked and also the adjusting discs.

This is done either when the rack 12 is brought into engagement with the teeth 7 or when the roll 32 is rotated, because in both cases the arm 42 engages and depresses the bar 16 and swings up the hook 49. discs are not in the zero-position, the circular portion of the disc-51 is presented to the hook 4-9 and the bar d5 locks both the rack 12 and the roll 32 in the inactive position by pressing the arm 42 up and the roller 39 into the recess at.

Thus by the above described adjusting mechanism the accurate operation of the machine is insured. v

Having now described my invention, what I claim as new and, desire to secure by Letters Patent is:

If on the other hand the adjusting 1. In a. computing machine, rotatable adjusting disks, movable teeth carried by said disks, toothed cam disks arranged to shift said teeth, independently movable pivoted arms having gnideways means tending to maintain the pivoted arms in normal position, and rocks movable longitudinally in said guideways and engageabie with the teeth of the cam disks, said racks being separately movable into engagement with the cam disk associated therewith and resdnectively movable for shifting said cam isk.

2 A computing machine as claimed in claim 1 in which the rack is provided with a plurality of notches corresponding tothe respective positions of the can; disk, and a stop member adapted to, enter the notches to lock the rack in inoperative position, the lowermost notch having a beveled. wall adapted to co-act with the stop member to eileot movement of the rack, into operative relation with the cam disc coincident with initial movement of the rack.

3. A computing machine as claimed in na claim 1, characterized by the provision off meansfor returning the rachm'cam discs? and ad usting discs to initial. position, said mechanism comprising a plurality of gear segments arranged adjacent the cam discs,

and means co-acting with said segments to move the racks into engagement with the;

respective cam discs prior to the return of the latter to nitial position.

/ 4. A computing machine-as claimed claim '1, characterized by the provision of";

means actuated by the rack sup orting arms to lock the several adjusting iscs in zero sition.

5. r computing machine as disclosed inclaim 1 characterized by the provision of a flexible indicating element attached to each rack and actuated thereby to indicate the relntirel; stationary roller receiving the indicating elenicnt when the rack is retracted;

and niennt to guide the indicating clement whereby the latter is caused to coil upon the rewiring menus:

In witness whereof I signed my name.

"ALENTIX JAKOB ODHNER.

have hereunto

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