US1983625A

US1983625A - Calculating machine

Info

Publication number: US1983625A
Authority: US
Publication date: 1934-12-11
Anticipated expiration: 1951-12-11

Description

1.1, 1934- c. LUTTROPP CLCULATING MACHINE Filed Oct. 18, 1927 3 Sheets-Sheet 1 m um l /U/ w Dec. 1,1, 1934. c. LuTTRoPP CALCULTVING MACHINE Filed 0G13. 8, 1927 3 Sheets-Sheet 3 /ffATToR 55 secondary key board for setting up an item in that is to say, to amachine in which one key only I Patented Dec. l1, 1934 1 UNITED STATES PATENT OFFICE CALCULATING MACHINE Conrad Luttropp, Stockholm, Sweden, assigner of one-half to Anders Lindahi, Stockholm, Sweden Application October 18, 1927, Serial No. 226,968

54 Claims. (Cl. 235-63) Calculating machines are already known in the secondary selector. In performing multipliwhich multiplication may be effected by registercation one factor is set up in the primary secing the multiplicand in the main counting tion and another factor is set up in the secondary register as many times as the multiplier indisection. I provide novel and improved means 5 Cates, that is to say, by adding the multiplicand for repeated operation of the primary section 5 to itself a number of times equal to that indiunder control of the secondary section to transfer cated by the multiplier. This operation may be an item set up in the primary selector to the facilitated by having the calculating machine totalizer in accordance with the item set up in provided with a so called tabulator, that is to the secondary section. My calculating machine l say, with means for moving the main counting includes means for positively moving the various l0 register or totalizer step by step from one digit mechanisms. The secondary section is zeroized value to another, in which case the multiplicand by positive means, as distinguished, for example, is rst registered in the counting register as many from elastic means, and preferably by the autotlmes as is indicated by the unit figure of the matic operation of power mechanism. In the l multiplier, said register being then displaced one zeroizing operation, transfer from digit to digit l5 step to the left, whereupon the multiplicand is is positively effected. The totalizer is stepped by registered as many times as the ten digit of the positive means. By providing positive drive of multiplier indicates, etc. In order to avoid the the various partsI obtain quicker operation than necessity of setting up the multiplicand on the has heretofore been possible, and I eliminate key board for every actuation of the main countfriction and provide an adequate force at all 20 ing register, calculating machines have been detimes to insure accuracy. signed which are provided with a so called re- In the preferred embodiment of the invention peating key which, when depressed, prevents the said secondary selector comprises a carriage counting members from being returned to their movable step by step in either direction and a starting position so that the number set up will plurality of members, as horizontal racks, slid- 25 be retained in the selector. This provides semiably mounted on said carriage and each engaging automatic multiplication, being automatic for a disk presenting circumferentially disposed nuone digit only, as it is necessary to manually move merals. the carriage one step when passing from one digit The invention further comprises stopping column to the next. means actuated by the keys of said secondary sec- 30 The present invention relates to calculating tion for limiting the movement of said members machines having a selector'. and a plurality of or racks. Such stopping means may comprise a keys for operating said selector and has for its set of pivotallymounted levers each connected principal object to provide means whereby autowith a. member or rack. I also provide means to matic multiplication may be obtained not only effect a horizontal step by step movement of said 35 with multipliers comprising a simple digit but secondary selector during the setting operation yalso with multipliers comprising two or more as well as during the zeroizing operation, means digits, without the necessity of manually operoperated by the secondary series of keys for ating the main counting register in passing from locking said members or racks in zero position,

40 a digit column to the next. and means for rendering the item transfer mecha- 40 In accordance with the invention and my prenism ineffective during the stepping of the ferred embodiment thereof, I provide a calculattotalizer. ing machine having what I term a primary sec- The zeroizing means is preferably operated by tion and a secondary section and means whereby the driving shaft of the machine, Whereas the the primary section is operated under control of step by step movement of the secondary selector 45 the secondary section. The primary section induring the setting operation is preferably concludes a primary key board, a selector operated trolled by springs. by the primary keys of the primary key board, The invention further comprises other novel and in which items may be set up, a totalizer, features as will more fully appear from the foland item transfer mechanism for transferring an lowing detailed description. 50 item set up in the selector to the totalizer one or In the following detailed description the inmore times. The secondary section includes a vention will be described as embodied in a calsecondary key board having secondary keys and culating machine made up in part of a known a secondary selector operated by the keys of the ten-key calculating machine of a special type,

is provided for each gure. It is to be noted, however, that the invention may also be applied to calculating machines of other types including multi-key calculating machines, that is to say, machines in which there is a row of keys for each digit.

The machine described is driven by an electric motor though tlfeinvention is not restricted to motor-drivenmachines but may also be applied to manually operated machines.

In the accompanying drawings:

Fig. 1 is an assembly view, somewhat diagrammatic, showing a calculating machine'provided' with mechanism in accordance the' presentV a part' of the y showing' tabulating or stepping mechanism;

i Fig; fi is aview of part of the mechanism of Figtrl; and l Y Fig. S isa view of another part of the mechanism of' Fig. 1. o

In the following description the secondary key board is consideredas being at the front part of thev machine, and the expressions forwards and backwards as" well as front and rear are used withl regard thereto. The expressions rightkv and left refer to the machine as seen fromA the front. y y

`As will more clearly appear as the' description proceeds, my preferred form of calculating machinel embodying the invention has parts similar to the calculating' machine described in my Patent No. Yincarne, granted lr/rarh 13, 192s. My

' present' calculating machineA incorporates the essential features of the machine set forthV in that patent and Ii have added mechanism for setting upl an independent numerical factorjand cooperating parts for correlating the additional mechanism to the mechanism described in the aforesaid patent. For purposes of ease of definition,`ease of description,- and ease of understanding, I herein classify the present machine as comprising, general, a primary section, a secondary section and operating" mechanism. The primary section is essentially the theY calculating machine of the aforesaid patent and includes primary item yset-up mechanisin; item transfer mechanism anda totalizing mechanism including the usualk tens transfer mechanism. iI "he secondary section includes a secondary set-up mechanism. If two numbers are to be multiplied, one is set up in the primary section, the other in the secondary section, and driven parts perform the multiplication, in the course of which the mechanism of the primary section is controlled in certain respects by the mechanism ofv the Asecondary section and the product is registeredin the totalizaer, all aswill more fully appear.

In' view of the similarity of the primary section of the machine of this' application to the machine of aforesaid patent, it will sufnce to more briefly describe and show the primary section herein than would otherwise be the case, since reference may be had to the aforesaid patent for details of construction, wherefore I will explain the primary mechanism herein only so far as is necessary to an understanding of the invention.

The primary section The primary section comprises primary keys 250 mounted on.y primary key boa-rd 10,y and loperable by means of mechanism including rods 251 to set up digits in an oscillatory primary sector 11. It also comprises spindles 13 and what I term a counting' drum 12. The key board 10 contains ten keys corresponding to the digits 0 to 9, re- Spc-Actively,I and a number of other controlling keys one of which only is Shown, namely the repeating key 15, the'r other controlling keys not being necessary for a clear understanding of the invention.v The primary selector 11 comprises, brieiiy, groups of movable stops or tongues, the tongues of each group being arranged one above the 'other and' corresponding'to the different. digit keys- The tonguesz are set into operative'positions' by depressing theI keys,` the selector 11' being y at the Sametime movedstep by step. Co-operating with said groups of tongues are the count'- ing spindles 13, which are movable vertically into positions determined by the tongues projected in the selector. Each counting spindle 13 carries a pinion 16 adapted to be actuated bythe drum 12 when positioned laterally adjacent the drum and when the latter is rotated by transmission of movement thereto from the main driving shaft 17' of the machine by way of arm 18,` link 19,. gear segment" 20, and gear Wheel 21. The gear 21.1rotates ami'ter gear 252, through a: one-way clutch, which operates mechanism for rotating a vertical shaft on which drum 12 is mounted. 'Pref'- erably a clutch and oppositely rotatable miter gears are used, as disclosed in my aforesaid patent by means of which drum 12 can be rotated in either direction. The drum 12` comprises discs provided with different numbers of teeth and arranged one above the other and whichv cor.- respond in orderto the different unit digits. The upper' end of each counting' spindle 13' is engaged by a rotatable spindle-22 in such a manner that the spindle '13` can move axially but can not rotateY in relation to the spindle 22. At its upper end each spindle 22 carries a bevel gear 23 to transmit the movement to the main counting register or totali'zer 29" which is located in the carriage 3'0" movable" stepby step in either direction. The transfer of digits set up to totalizer 29 takes place by way of the bevel gear 24 engaging the bevel gear 23, the intermediate shaft25 carrying saidv bevel gear 24, the gearing'26, 2'at the opposite endof shaft 25 and the'y intermediate Wheel 28. It wllfbe seen that the primary keys 250, the primary selector ll and the intermediate actuating mechanism constitute set-up -mechanisrn for setting up digits in the selector;

and that gear sector 20, drum 12, the intermediate mechanism between gearsector 20 and drum 12, spindles 13, the mechanism moving the same and the

parts

22, 23, 24, 25, 26, 27 and 28 constitute item transfer mechanism for transferring the items set up inthe primary selector to the totalizer. 'v

" The means for moving the totalizer carriage 3i) rstep 'by step in either direction is of the type shown. in my Patent No. 1,671,537. In the embodiment shown the means for moving the carriage in one direction comprises, as shown, a double rack 31 secured to the carriage 30 on the lower edge thereof and having two series of Vkey will be described in detail.

teeth directed in opposite directions, and a tabulator bar 32 suitably guided in a xed guide way 254 secured in the machine frame. Adjacent the upper end of bar 32 and guided between bar 32 and guide 254 is a pawl 33 adapted to mesh with one row of teeth of the rack 31. Pivotally mounted on the up vr portion of bar 32 by means of the pin 34 is another pawl 35. A tension spring 36 is secured to the machine frame and the lower end of pawl 35. A pin 37 mounted on member 33 engages an elongated slot 38 in the pawl 35. Those ends of the two

pawls

33 and 35 which are adapted to mesh with the rack 31 are so shaped that, when the rod 32 is moved upwards, the pawl 35 is rst brought into engagement with a tooth of one of the rows of teeth to cause a displacement of the rack together with the carriage 30. The movement is restricted to one step only due to the pawl 33 engaging a tooth of the other row of teeth of the rack 31. For further details, reference may be had to my aforesaid Patent No. 1,671,537.

As the repeating key forms an essential part of the device according to the present invention, said In the embodiment shown key 15 comprises a rectangular sheet metal plate carrying two depending rods 40 guided in the plate of key board 10 and each plvoted at its lower end to a. bell crank lever 41, each bell crank lever being pivotally mounted on a fixed shaft. Said bell crank levers are connected to each other at their lower ends by means of a link 42. Loosely mounted on a shaft 43 secured to the machine frame is a fork-shaped arm 44, one leg of which engages a pin 46 on the link 42 and is held thereagainst by means of a spring 45 secured to one of the levers` 41, the other leg o1 the 44 being extended so as to bear against a roller 47 carried at the free end of an arm 48 secured to a shaft 43 journalled in the machine frame for instance, by means of brackets 50. The key rods 40 are each provided with a notch 51 by means of which the key, when depressed, will be retained in depressed position in engagement with the underside of the key board 10. Springs 52 secured at one end to each of the levers 41 and at the other end to the key board 10 tend to return the key into its raised position. When key 15 is depressed and locked in its depressed position by notches 51 under the key board 10, the long arms of the bell-crank levers 41 are moved toward the front of the machine, carrying with them connecting link 42 and its pin 46. This movement releases the short end of lever 44 and permits spring 45 to pull on this lever and cause its long end to depress roller 47 and shift belicrank 48 to connect the motor, as hereafter' described.

As long as the key 15 remains locked lever 44 will follow bell-crank 48 under the influence of spring 45, automatically repeating the connection to the motor drive for multiplication.

The repeating key is in well knowny manner connected to the selector 11 so that upon the depression of the repeating key the selector and the counting spindles will be prevented from returning to their starting position as in .my Patent No. 1,662,526. To illustrate this I have shown bar 56 and rod 257 attached to bell crank 41 and it will be understood that these are connected to the mechanism shown and described in that patent for maintaining items in the primary lector for repeated transfer to the tctalizer.

The secondary key board 100 designates a frame adapted to be applied to the previously described primary section of the calculating machine and what is the calculating machine proper of my aforesaid Patent No. 1,662,526 in front of the primary keyboard 10. Mounted in said frame 100 are ten keys corresponding to the digits to 9 inclusive (see especially Figs. 2 and 4). Each secondary key comprises a rod 101 guided in a corresponding opening in the frame 100. The head 102 of each key carries a figure. At its lower end each rod 101 is pivoted to one end of a bell crank lever 104 journalled in the frame by a pin 103. Journalled on a shaft 106 rigid in the frame is a set of bell crank levers 107 mounted close to each other on said shaft. The number of said levers 107 is equal to the number of the secondary keys. There are, thus, ten levers 107. Such levers 107 will hereinafter be termed stop levers on account of their action. The lever 104 associated with each key rod 101 is connected at its other end to the lower end of corresponding one of said stop levers 107 by means 01' a link 108. By means of springs 109 secured to the frame 100 and to the individual levers 104 the keys are maintained in elevated position. By depressing a key the corresponding stop lever 107 will be turned upwards.

The secondary selector Disposed in the frame 100 of the secondary section of the calculating machine is a horizontal guide plate 112 to guide the secondary selector. This secondary selector comprises a plurality of straight rods or racks 114 reciprocating transversely of the carriage 113 which is slidably mounted on guide plate 112. Near its rear end each rack -114 is provided with ten teeth 115 on its lower edge and at its front portion the rack has another row of teeth 116 on its upper edge of the same pitch as that of the teeth 115. Loosely mounted on a shaft 117 fixed to the carriage 113 are a plurality of pinions 118 adapted to mesh with the teeth 116 of the individual racks 114. Each pinion 118 is rigidly connected to a numeral wheel 121 presenting at its circumference the digits 0 to 9, inclusive. Loosely mounted on another shaft 122 xed to the carriage 113 (see 1) are a plurality of locking levers 123, one each rod or rack 114. A spring 124 connects each lever 123 to the rear end of the corresponding rack 114. Accordingly, the springs 124 tend to move the racks 114 toward the front of the machine. In the zero position of the corresponding rack 114 this tendency is overcome by the engaee- Means for stepping 'the secondary selector to the left Attached to the front side of the guide plate 112 (see Figs. 2 and 4) is an arm 130 carrying at its free end pin 131 in engagement with an elonslct 132 formed in a movable member or bridge 133. Pivotsd to said bridge 133 is one end of a bell crank lever 135 rotatably mounted in the 100 at 134, Fig. 2. This lever 135 due to its function will hereinafter be termed releasing lever. The other or free end of releasing lever is adapted to co-operate with that locking lever123 which for the time being has its front end just under the free end of lever 135. The broad end of bridge 133 terminates in close proximity to the lower arms of the stop levers 107 and is at this place of such a Width as to be moved to the left every time that any of the stop levers 107 are turned upwards due to operation of the corresponding key. Pivotally connected to the bridge 133 is one end of an angularly shaped pawl 136 pivoted to the under side of the guide 112 at 140. It is thus seen that the bridge 133 is guided on the one hand by its engagement with the arm 130 and on the other hand by its engagement with the pawl 136. Loosely mounted on the same pin 140 as the pawl 136 is another angularly shaped p-awl 141 directed in opposite direction to the pawl 136.

Thepawls

136 and 141 co-operate with each other by means of a pin 142 carried by the pawl 141 and held in engagement with the pawl 136 by means of a spring 143 secured to the guide 112. The

pawls

136 and 141 are adapted to engage a rack 144 secured to the secondary selector carriage 113. Normally, the pawl 141 is in mesh with said rack 144, whereas the pawl 136 is out of engagement therewith. A spring 145 connects the secondary selector carriage 113 to the frame 100, as at 146, said spring thus tending to move the secondary selector to the left against the action of the locking means above described.

Means for stepping the secondary selector to the right Pivotally mounted at 156011 the under side of the guide plate 112 is a lever 151 carrying at its free end a pawl 153 which may turn*on the pin 152. Pawl 153 is adapted to mesh with the rack 144 but is normally held out of engagement therewith. Furthermore the arm 151 is provided with a fixed tooth 154 as well as with a stop 155 against which latter the pawl 153 is normally held by means of a spring 156. Furthermore, the arm 151 carries a guiding pin 157 engaging a slot 160 in a link 161 forming part of. the aeroizing means to be hereinafter described and carrying at its foremost end an abutment 162. The link 161 con= stitutes an operating member for stepping the secondary selector and performs a reciprocating movement during the Zeroizing operation in the manner to be hereinafter described and will in this movement slide to and fro guided by the pin 157. An arm 163 likewise belonging to the zeroizing means is pivotally connected to a stop arm 164 the free end 165 of which constitutes a stop. A spring 166 connects the arm 163 to the stop arm 164, and an abutment 167 on the arm 163 limits the angular position of the arm 163 and the stop armk 164 in relation to each other in the one direction. The arm 164 which in the zeroizing operation is normally out of engagement with the guiding pin 157 and the vabutment 162 will be turned upwards when the selector 113 is to be stepped to the right, whereby its free end is lifted in between said guiding pin 157 and said abutment 162 (see Fig. 3), causing the reciprocating link 161 to positively bring with it the arm 151 causing the selector 113 to be moved one step in the manner to be described below.

The driving mechanism VMounted at a suitable point on the base is an electric motor 170 (see Fig. 1) from which motion is transmitted to the driving shaft 17 of the machine, forinstance inthe following manner. Attached to the motor shaft 172 is a Worm 173 and meshing with said worm is a worm wheel 175 secured to a central operating shaft 174 journalled in the base. chosen as to give the shaft 174 a number of revolutions suitable for the operation of the machine. Journalled on a fixed pin 176 in the base yis an arm 177 carrying a rotatable disc 180 whichcooperates with a cam disc 181 eccentrically mounted on the shaft 174. The arm 177 is pulled by a spring 182 in such manner as to keep the disc 180 in permanent engagement with the cam disc 181. On rotation of the motor it will be seen that the free end of the arm 177 will be given a reciprocating movement. Said free end of the arm 177 engages a roller 184 carried by the arm 18 secured to the main driving shaft 17 of the machine, and as a result said shaft 17 will be caused to oscillate when the motor vis running. From the electric motor 170 the motion is also transmitted to the zeroizing means hereinafter described, on the one hand by means of a link 161 pivotally mounted eccentrically on the end of the shaft 174 and, on the other hand, by means of the link 185 pivoted to the arm 177 at a suitable point 186 in relation to the turning axle 176. When the motor is run-- ning, said two

links

185 and 161 will, consequently, aso perform a reciprocating movement, the points of mounting of said linksbeing suitably chosen with regard to the movements which the links are to eect and which will be described hereinbelow.

From the motor 170 the motion is also transmitted to the shaft 49. To this end shaft 49 carries an arm 60 pivotally connected at its free end to a fork 61 extending downwardly tothe shaft 174. The arm 61 `is part vof well-known mechanism for controlling the operation of the motor and its effect on the actuated mechanism. While, for sake of illustration, I have shown one means of motor control in Figs. 1, 7 and 8, vit will b-e understood that various vknown motor control mechanisms may be employed. In the arrangement shown, the motor is started by a switch thrown into electric contact on depression of the repeating key 15. This is done by arranging a linkage 260 to close a switch 261 of known kind mounted on shaft 174. Preferably the starting mechanism of the motor is so constructed that the motor, after having been started, will continue its rotation during a given period of time, for example, 40 to 60 seconds, whether or not the repeating key 15 has been returned to its raised position in the meantime and the contact'controlled by said key has been broken. This can be accomplished by having the motor cut itself out after a given number of revolutions from the time of contact. To stop the actuation of the calculating machine I may use any of various known types of clutches as, for example, a pawl and ratchet clutch in which a ratchet wheel 262 (Fig. 7) carried by the wormwheel 175 cooperates with a pawl 263 carried on the separate driven part of shaft 174, which pawl cooperates with an abutment 264 on arm 61. A roller 265 or other part connectedrtoor forming part of arm 61 is arranged to be contacted by cam disc 62 mounted on the driven part of shaft 174. W'hen the motor is ruiming and repeating keyr15 depressed, the P action of cam 62 in pushing arm 61 upwardly and the action of spring 45 in urging arm 61 downwardly will cause the shaft 49 together with the arm 48, the roller 47 and the fork-shaped arm earing on the latter to move to and fro.

The ratio of the worm gearing is so Cam F 62 moves' abutmentv 264 into position to be contacted by pawl 263 to throw the clutch out of engagement, but so long as the repeating key is depressed, spring 45 urges arm 60 and consequently abutment 264 downwardly before contact therewith of pawl 263 would occur so that the upper part of pawl 263 passes over abutment 264 and disengagement does not take place.

Shifting of the selectors subsequent to zeroizing the racks of the secondary selector Mounted on a loose shaft 190 held in the frame 100 is a member 191e to an arm of which the link 185 is pivoted. Pivotally mounted in 'an arm of a member 191 is a catching hook 192 actuated by a spring 193 secured to the member 191. The members 191 and 191a 'move together and may be said to constitute a double-armed cross-piece to the one arm of which the link 185 is pivoted and to the other arm of which the catching hook 192 is pivoted. 'I'he catching hook 192 is so arranged in relation to the selector 113, that, when the latter in the setting operation is moved its first step to the left, in the manner to be hereinafter described, the catching hook 192 is right below the extreme left hand rack 114 so that the hook 192, during the zeroizing operation, is brought into engagement with the teeth 115 on the under side of said rack 114 due to its reciprocating movement in a manner to be described later on.

'Ihe arm 163 above referred to as forming part of the zeroizing mechanism is loosely journalled on the shaft 190 and extends on the rear side of said shaft in the form of an arm 194 bent upf wards which is located in front of the rack 114 farthest to the left, when the selector 113 is moved its first step to the left. Furthermore, said arm 194 is so located as to be in alignment with the rear ends of the racks 114 when said racks are in their zero positions. Consequently, the arm 194 will be turned backwards when the rack 114 lying right in front of the arm is moved backwards beyond its zero position in the manner to be described below, causing, amongst other things, the

' upward turning of the stop arm 164 referred to above.

Pivotally connected with the arm 194 at 196 is another arm 195 suitably guided as at 197 which co-operates with means for moving the totalizer carriage 30 step by step. Journalled in the frame of the primary section of the calculating machine proper as at 198 is an angularly shaped catching lever 201 carrying at its one end a hook 202. The other end of the said lever 201 is operated by the driving shaft 17 of the machine, for instance by means of a slot 203 formed in said end of the lever 201 and a pin 204 on the arm 18 engaging said slot. Movably connected with the driving bar 32 of the tabulator as at 207 is a ratchet 206 normally held in a forward position by means of a spring 208 and which is adapted to be operated by the arm 195 to be pushed rearwardly through hole 209.

The zeroizing mechanism further comprises means for lifting the repeating key l out of engagement with the plate of key board 10, when the zeroizing operation is completed. The rack 114 farthest to the left is provided with an abutment 210 which, when said rack is in zero position, bears on the end of the lower arm of a. lever 211 journalled in the machine frame at 43. The upper arm of said lever 211 is adapted to engage an abutment 212 disposed on the under side of the repeating key 15, said upper arm lying behind said abutment, when the repeating key is depressed. When, in the zeroizing operation, the rack 114 farthest to the left is moved backwards beyond its zero position, in a manner to be hereinafter described, the abutment 210 of said rack 114-will, as a result, turn the lever 211 whereby the upper end of said lever on account of the engagement with the abutment 212 will move the repeating key forward so as to bring the key rods 40 out of engagement with the key board plate to allow the key to be lifted by `the action of the springs 52.

Furthermore, it is necessary that the counting members of the primary section of the calculating machine are out of operative engagement with the driving shaft when the racks 114 by power transmitted from the motor 170 are moved backwards beyond their zero positions, as during said last-mentioned movement the totalizer must not be operated. To this end the link 19 engages the driving toothed segment 20 by means of a

slot

2,15 in the link and a pin 216 on the segment. 'I'he link 19 extends forwardly and is shaped so that its free end normally engages a pin 217 on the arm 195. It is evident that, when the arm 195 is moved backwards, the link 19 will be lifted out of engagement with the segment 20 and may slide freely on the pin 216 during the next operation of the machine.

The operation of the mechanism is as follows:

On depressing a key on the secondary key board 100 the stop lever 107 connected with said key is turned upwards by means of the corresponding bell crank lever 104 and the link 108. When the stop lever 107 is thus turned upwards the bridge 133 is moved a distance to the left. This will cause the upper arm of the releasing lever 135 to turn downwardly into engagement with that locking lever 123 lying farthest to the left which causes a release of the corresponding rack 114 so that the latter will now be free to move forwardly under the action of the spring 124, until its front end strikes the actuated stop lever 107; that is to say, it will be moved a distance corresponding to the key pressed down. When the rack 114 is moved forwardly the pinion 118 engaging the teeth 116 on said rack and, consequently, also the figure wheel 121 rigidly connected to said pinion are rotated a corresponding number of steps, so that the ligure set up will be visible through a window in the frame. When the bridge 133 is moved to the left the

pawls

136 and 141 are actuated in such manner, that the pawl 141 is first brought out of engagement with the rack 144 whereby the latter together with the entire selector 113 will be free to move to the left under the action of the spring 145. This movement, however, is limited to approximately half a pitch as the pawl 136 which has previously engaged the rack will prevent further movement due to its oblique surface engaging in a tooth space of the rack. When then the key 102 is released the bridge 133 will return to starting position by the action of the spring 143 causing disengagement of the pawl 136 so that the selector 113 becomes free to move to the left the remainder of a pitch by the action of the spring 145, until the pawl 141 engages the next tooth space of the rack 144. 'I'he depression of a key has, therefore, set the first rack 114 and the figure wheel connected thereto in conformity with the key pressed down and has moved the selector 113 as a whole a step to the left so that the next rack 114 with its locking lever 123 has been brought in front of the releasing lever 135. Then the operation may be repeated, until the desired, number has been set u pin the selector 113. 1 y

. ,Assuming that a multiplication is to be performed, for instance, 4.that the number 456 is to be multiplied bythe number' 23. One factor, as 456, is then set up onthe primary key board l0, and the other-factor, that is 23, onthe secondary key boardA 100. Accordingly, the number 456 is set up in the primary selector -11 and the number 23 in the secondary selector 113,V the latter assuming a position in which the two ligure wheels 121 lying farthest to the lett will show, as seen from the left, the figures 2 and 3, respectively, while the second rack 114, as seen from the left, lies in register with the catching hook 192 and exactly in front of the angular arm 194. The repeating key `15is now depressed and locked bythe notches 51 engaging the plate of primary key board 10. This will lock the primary selector 11`in the set position by the mechanism and in the'manner describedin my aforesaid Patent No. 1,662,526 and,furthermore, the circuit of the electric motor is closed so that the latter is started. By means of the worm gearing 173, and the cam device 180, 181 a reciprocating movement is imparted to the arm 177 causing'an oscillation of, the driving shaft 17. Such a movement is also imparted to the catching hook 192 by means of the link 185 and the cross-piece 191 to cause the hook 192 by engagement in the teeth 115 to move the second rack 114 as counted from the left backwardly step by'step. For each backward step of the rack 114 and, consequently, for each oscillation of the driving shaft 17 the number 456 set up in th primary selector 11 will be transferred to the totalizer 29.. When the rack 114 is moved three steps, its rear endwill strike against the arm 194. VThe rockv 114 is then once more actuated by the catching hook 192, before the secondary selector is moved one step tothe right. This additional actuation of the rack to the rear of Zero position, however, kdoes not cause any permanent displacement of the rack, as the tooth 116 that would correspond to the position of the rack after the completion of said last-mentioned actuation, is omitted so that the rackY will be returned to zero position by the action of the spring 124 in which position the locking lever 12.3 engages the foremosttoothllr.

During this `temporary displacement of the rack 114 into engagement withthe arm 194, the latter is swungr backwards causing the following movements.` The armv connectedv to arm 194 is moved backwards causing the pin 21.7 thereon to lift the link 19 out of engagement with the driving gear segment20 thereby disengaging the primary section of the calculating machine during this additional stroke. The backward displacement of the arm 195 also causes the ratchet 206 to be pushed rearwardly and the upper rearwardly extending finger thereof to pass rear,- wardly well through the hole 209 in the bar 32 ofthe tabulator. For each of the preceding three steps of the rack 114 the catching lever 201 has made an oscillation under the action of the driving shaft 17 by means of the slot and pin connection` 203, 204. This movement, however, has not resulted in any actuation of thetabulator, as the ratchet206 has not projected through the hole 209 in the bar 32 and, consequently, hasnot been moved into the path of'movement of the catching lever 201. Now, howevenwhen the upper. nger ofV ratchet 206 is moved rearwardly through hole 209m bar 32, ,the catching. lever 201 will on its return stroke engage the nger of ratchet 206 and carry the bar 32 upwardly thus eiecting a `displacement of thetotalizer carriage 30 one step. During this additional stroke of the rack 114 the secondary selector 113 is also displaced one step to the right which takes place as follows. During the zeroizing. operation the link 161 performs a reciprocating movement sliding on the guiding pin 1,57 of the arm 151. When the arm 194; is swung backwards, the arm 163 rigidly kconnected thereto is turned upwards so` that the stop arm 164 connected to said armV 163 with its end or stop 165 is lifted up between the guiding pin 157 and the abutment 162 of the link 161. When, as a result, the link 161 during said additional stroke of the rack 11.4 is movedbackwards it will bring with it the arm 151 whereby the pawl 153 connected to saidarm 151 will be brought into engagement with the rack 144 to move said rack together with the secondary selector 113 one step to the rig-ht. In this displacement the tooth `154 will act as a brake, and the movement of the arm151 withits pawl 1-53fis so adjusted as toflimit the displacement to one step. It will be seen that the arm 164 may be said to constituter a control member for controlling the stepping of the secondary selector the. control member being actuated by movement of the racks, andthe actual stepping being caused by the operation of link 1-61.

At the end of this additional strokeV of the rack the link 19 again engages the driving segment 20 to again bring the primary section of the. calculating machine into, engagement -withthe driving shaft. It is. thus seen that the rack 114 farthest to the left is just aboveV the catching hook 192, and the operation is continued in the same manner untily also this rack is zeroized. During the additional str-oke of saidextreme left hand.

rack the repeating key 15` willbe released. by the abutment 210on. said rack operating the lever 211, causing it toy move the repeating key 15 forward on account of its engagement with the abutment 212 on. said key, whereby the rods Lio-.win bedisengagedy from the key boardl 10-and the key will: be raised by the action of the springs 52.

On'zeroizing the second rack 114 as seenl from the left product 3f 456 has been obtained in the totalizer and. on zeroizing the rack 114 farthest to the left the product 20 456, is obtained', that is to say, the nal result will be 23 456.

What I claim. is:

1. In. a calculating machine comprising. aprimary selectona primarykey. board having digit keys, means operable by said keys for setting up digits in theprimary selector, a totalizer, primary item. `transfer. mechanismv for transferrir-igv items from the primary selector to the totalizen motor mechanism, and mechanism forming. a. power, transmission connection between said motor mechanism and said primary itemrtransfermechanism, the combination therewith of a. secondary selector, a secondary key board having digitkeys, means operated by the. last-mentioned keys for setting. up digitslin the secondary selector, means operated by saidmotor mechanism to successively Zeroize` the digits .set up-in the-secondary selector unit by unit,.means controlling operation of the primary` item, transfer, mechanismy in. accordance with the Voperation ofthe secondary selector, andA means` controlled by. said. secondary selector. and'.

operated. by. said. motor mechanism tofstep .said 'iaotalizerafterthe zeroizing of each, digitand on transfer from digit to digit in thesecondary selector.

2. In a calculating machine comprising a primary selector, a primary key board having digit keys, means operable by said keys for setting up digits in the primary selector, a totalizer, primary item transfer mechanism for transferrlng items from the primary selector' to the totalizer, motor mechanism, and mechanism forming a power transmission connection between said motor mechanism and said primary item transfer mechanism including separable parts for making or breaking the power transmission connection, the combination therewith of a secondary selector, a seconda-ry key board having digit keys, means operated by the last mentioned keys for setting up digits in the secondary selector, means operated by said motor mechanism to successively zeroize the digits set up in the secondary selectoi` unit by unit, means controlling operation of the primary item transfer mechanism in accordance with the operation of the secondary selector, means controlled by said secondary selector for disconnecting said separable parts and means for stepping said totalizer while said parts are separated.

3. In a calculating machine comprising a primary selector, a primary key board having digit keys, means operable by said keys for setting up digits in the primary selector, a totalizer, primary item transfer mechanism for transferring items from the primary selector to the totalizer, motor mechanism, and mechanism forming a power transmission connection between said motor mechanism and said primary item transfer mechanism including separable parts for making or breaking the power transmission connection, the combination therewith of a secondary selector, a secondary key board having digit keys, means operated by the last-mentioned keys for setting up digits in the secondary selector, means operated by said motor mechanism to successively zeroize the digits set up in the secondary selector unit by unit, means controlling operation of the primary item transfer mechanism in accordance with the operation of the secondary selector, means controlled by said secondary selector for disconnecting said separable parts and means controlled by said secondary selector and operated by said motor mechanism to step said totalizer while said parts are separated.

4. In a calculating machine comprising a primary selector, a primary key board having digit keys, means operable by the keys for setting up digits in the primary selector, a totalizer, and primary item transfer mechanism for transferring items from the primary selector to the totalizer, the combination therewith of a secondary selector, a secondary key board having digit keys, means operable by the last-mentioned keys for setting up digits in the secondary selector, means to successively zeroize the digits set up in said secondary selector imit by unit, and positively operated reciprocating means controlled by said secondary selector to step said totalizer.

5. In a calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; the combination therewith of a secondary section comprising item set-up mechanism including movable elements adapted to be moved and stopped to set up items; means for operating said primary section in cycles under control of said movable elements of the secondary section comprising a motor and power transmitting means operable by said motor to actuate said item transfer mechanism once during a cycle; means for producing one or more extra movements of said movable elements; means for stepping said totalizer during such extra movement under control of said secondary section; and means for rendering the item transfer mechanism inoperative during such extra movement when the totalizer is stepped.

6. In a calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; the combination therewith of a secondary section comprising item set-up mechanism; totalizer stepping mechanism; operating mechanism having revolutions of movement; and means controlled by said secondary section for causing said operating mechanism to operate said item transfer mechanism during certain one or more revolutions and means controlled by said secondary section for connecting said operating mechanism to said totalizer stepping mechanism during certain other one or more revolutions.

7. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising item set-up mechanism; totalizer stepping mechanism; operating mechanism having revolutions of movement; and means controlled by said secondary section for causing said operating mechanism to operate said item transfer mechanism but not said stepping mechanism during certain one or more revolutions; and means controlled by said secondary section to operate said stepping mechanism but not said item transfer mechanism during certain other one or more revolutions.

8. In a calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising item set-up mechanism; and a motor; the combination therewith of a shaft driven by said motor; power transmitting means comprising separable parts operable to actuate said item transfer mechanism once for each revolution of said shaft; means for stepping said totalizer during a revolution of said shaft; means to separate said separable parts for rendering said item transfer mechanism inoperative during said last-mentioned revolution when the totalizer is stepped; means whereby the operation of the power transmitting means is controlled bysaidsecondary section; and means whereby the totalizer stepping means is controlled by said secondary section.

9. In a calculating machine the combination with a primary section comprising a ten-key primary key board, a primary selector, means operated by the keys of said primary key board for setting up an item in said primary selector, a totalizer and item transfer mechanism for transferring the item set up to the totalizer; of a secondary section comprising a ten-key secondary key board, a secondary selector including a movable carriage and means operated by the keys of said secondary key board for moving said carriage and setting up an item in said secondard selector; means for operating said primary section in cycles under control of said secondary section comprising a motor, and power transmitting means operable by said motor to actuate said item transfer mechanism once during a cycle; means for producing an extra movement of said secondary selector; means for stepping said totalizer during such extra movement;

and means for' rendering the item transfer mechanism inoperative during such extra movement When the totalizer is stepped.

1G. In a calculating machine the combination with a primary section Comprising a rten-key primary key board, a primary selector', means operated by the keys of said primary key board for setting up'an item Vin said primary selector, a totalizer and item transfer mechanism for transferring the item set up to the totalizer; of a secondary section comprising a ten-key secondary key board, a secondary selector including a movable carriage and means operated by the keys of said secondary key board for moving said carriage and setting up an item in said secondary selector; totalizer stepping mechanism; operating mechanism having revolutions of movement; and means controlled by said secondary section for causing said operating mechanism -to operate vsaid item transfer mechanism during certain rone or more revolutions and means for connecting said operating mechanism to said totalizer stepping mechanism during certain other one or more revolutions.

11. A calculating machine including a primary section comprising a ten-'key primary key board, a primary selector, means operated by the keys of said primary key board for setting up an item in said primary selector, a totalizer and item transfer mechanism comprising separable parts for transferring the item set up to the tota-liner; a secondary section comprising a ten-key secondary key board, a secondary selector and means operated by the keys of said secondary key board for setting up an item in said secondary selector; totalizer stepping mechanism; operating mechanism having revolutions of movement; and means controlled by said secondary section for connecting and disconnecting said separable parts to cause said operating mechanism to operate said item transfer mechanism but not said stepping mechanism during certain one or more cycles; and means to operate said stepping mechanism but not said item transfer mechanism during certain other one or more cycles.

`12'. In a calculating machine, the combination With a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, and means to longitudinally move said racks to set up digits, of means to return said racks unit by unit and beyond zero position and means for stepping said carriage controlled by movement of a rack on its return stroke beyond zero position.

13. In a calculating machine, the combination with a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plu rality of straight racks mounted in said carriage, and means to successively longitudinally move said racks to set up digits, of means to successively return said racks unit 'by unit and beyond zero position and means for successively stepping said carriage between the zeroizing of digits of adjacent racks actuated by successive movements of the racks on their return strokes beyond zeroposition.

14. In a calculating machine, the combination with a casing, a guide mounted in said casing, a carriageslidably mounted on said guide, a plurality of straight racks mounted in said carriage, and means to longitudinally move said racks to set up digits, of means to return said racks unit by unit and beyond zero position cornprising a rotatable shaft andmeans operated by.

Lsg-sacas said 'shaft to move a rack one unit for a revolution of said shaft and means for stepping said carriage-operated by movement of a rack on its return stroke beyond Zero position.y Y

15. In a calculating machine, the combination With a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, and means to longitudinally move said racks to set up digits, of means to return said racks unit by unit and beyond zero position comprising' a rotatable shaft and means operated by said shaft to move a rack one unit for a revolution of said shaft and means for stepping said carriage operated by revolution oi said shaft and controlled by movement of a rack on its return stroke beyond zero position. v Y

16. In a calculating machine, a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, means to longitudinally move said racks to set up digits, a rotatable shaft, means to return said racks unit by unit operated by said rotatable shaft and means for stepping said carriage comprising a ratchet mounted on said carriage, a pavvlv member mounted on said guide, an operating member, a control member, means operated by said sha-it for reciprocating said operating member and means for interposing said control member between said operating member and said pawl member.

17. In a calculating machine, a casing, a guide mounted in said casing', a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, means to longituclinally move said racks to set up digits, means to return said racks unit by unit and means for stepping said carriage comprising a ratchet mounted on said carriage, a pavvl member mounted on said guide, an operating member, a control member, means for moving said operating member and means for interposing said control member between said operating member and said pawl member.

18. In a calculating machine, a casi-ng, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, means to longitudinally move said racks to set up digits, means to return said racks unit by unit and means for lstepping said carriage comprising a ratchet said carriage, a pawl memberV mounted on mounted on said guide, an operating member, an electric motor connected to reciprocate said operating member, a control member and means operated by` movement of said racks for interposing said control member between said operating member and said pawl member.

i9. In a calculating machine, 'a casing, a guide mounted in said casing, a carriage slidably mounted on saidY guide, a plurality of straight racks mounted in said carriage, means to longitudinally move said racks to set up digits, means to return said racks unit by unit and means for stepping said carriage comprising a ratchet mounted on said carriage, a pavvl member mounted on said guide, an operating member,l

mounted in said casing,- a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, a series of aligned stops mounted in said casing, keys for selectively positioning said stops, means comprising ratchet mechanism operated on depression of the keys to move said racks successively past said stops, spring operated means controlled by depression of the keys to move the racks in alignment with a selected stop, means to return said racks unit by unit and means for returning said carriage comprisingr a pawl member mounted on said guide, an operating member, a control member, means for moving said operating member and means for interposing said control member between said operating member and said pawl member.

21. In a calculating machine comprising a primary selector, a primary key board having digit keys, means operable by the keys for setting up digits in the primary selector, a totalizer including a movable carriage and primary item transfer mechanism for transferring items from the primary selector to the totalizer, the combination therewith of a secondary selector including a movable carriage, the last-mentioned carriage being independently movable with respect to the carriage of the totalizer, a secondary key board having digit keys, means operable by the lastmentioned keys for moving the carriage of the secondary selector and setting up digits in the secondary selector, a rotatable motor shaft, means operated by said shaft to successively zeroize the digits set up in said secondary selector unit by unit and means operated by said shaft and controlled by said secondary selector to step said totalizer on transfer from digit to digit in the secondary selector.

22. In a calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising item set-up mechanism including a plurality of movable members; and adapted to be set to correspond to items a rotatable motor shaft; the combination therewith of means operated by said shaft for actuating said item transfer mechanism under control of said secondary section; and mechanism independent of said item transfer mechanism and operated by said shaft and controlled by said secondary selector by abutting relation with said movable members for stepping said totalizer.

23. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a selector carriage, movable members on said carriage adapted to be set to correspond to items and means for selectively moving and stopping said movable members to set up items in the secondary section; a carriage for said totalizer; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

24. In a calculating machine, a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, a series of aligned stops mounted in said casing, keys for selectively positioning said stops, means comprising ratchet mechanism operated on depression of the keys to move said racks successively past said stops, spring-operated means controlled by depression of the keys to move the racks in alignment each with a selected stop, a rotatable shaft, means operated by said shaft to return said racks unit by unit and means for returning said carriage comprising a ratchet mounted on said carriage, a pawl member mounted on said guide, an operating member operated by said shaft, a control member and means for interposing said control member between said operating member and said pawl member.

25. In a calculating machine, a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, a series of aligned stops mounted in said casing, keys for selectively positioning said stops, means comprising ratchet mechanism operated on depression of the keys to move said racks successively past said stops, spring-operated means controlled by depression of the keys to move the racks in alignment each with a selected stop, a rotatable shaft, means operated by said shaft to return said racks unit by unit and means for returning said carriage comprising a ratchet mounted on said carriage, a pawl member mounted on said guide, an operating member operated by said shaft, a control member and means actuated by abutting contact with one of said racks at a time for interposing said control member between said operating member and said pawl member.

26. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a selector carriage, movable members on said carriage and means for moving said movable members to set up items; a carriage for said totalizer; means for actuating said item transfer mechanism in accordance with the item set up in said secondary section; a rotatable shaft; and means operated by said rotatable shaft and controlled by movement of said movable members for moving said selector carriage and said totalizer carriage in the same direction.

27. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a selector carriage, movable members on said carriage and key-operated means for moving said movable members to set up items; a carriage for said totalizer; a rotatable shaft;

means for actuating said item transfer mechanism in accordance with an item set-up in said secondary section comprising a power connection between said shaft and said item transfer mechanism; means actuated by said shaft for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section; and means controlled by said secondary section for disconnecting said power connection when the carriages are moved.

28. In a calculating machine, a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of straight racks mounted in said carriage, a series of aligned stops mounted in said casing, keys for selectively positioning said stops, means comprising ratchet mechanism operated on depression of the keys to move said racks successively past said stops, spring-operated means controlled by depression of the keys to move the racks in alignment each with a selected stop, a rotatable shaft, means operated by said shaft to return said racks unit by unit and means for returning said carriage comprising a ratchet mounted on said carriage,

Cil

a pawl member mounted on said guide, an operating member operated by said shaft, a control member and means actuated by abutting contact with a rack for moving the control member into contact with the operating member.

29. In a calculating machine comprising a primary selector, a primary key board having digit keys, means operable by said keys for setting up digits in the primary selector, a totalizer, ,primary item transfer mechanism for transfer- -ring items from the primary selector to the to- .talizen motor mechanism, mechanism forming a ,power transmissison connection between said motor mechanism and said item transfer mechanism, the combination therewith of a secondary selector including straight racks, a secondary key board having digit keys, means operated by said keys to successively move said racks to selective positions to setV up digits in said secondary selector, means operated by said motor mechanism to successively zeroize the digits set up in the secondary selector by successively returning said racks unit by unit, means controlling operation of the item transfer mechanism in accordance with the action of the secondary selector, and means for controlling the stepping of the totalizer comprising a member moved by abutting contact therewith of a rack at theV end of the return stroke thereof during the Zeroizing operation on transfer from digit to digit.

30. In a calculating machine comprising a primary selector, a primary key board having digit keys, means operated by said keys for setting up digits in the primary selector, a totalizer, item transfer mechanism for transferring items from the primaryselector to the totalizer, motor mechanism, mechanism forming a power transmission connection between said motor mechanism and said item transfery mechanism, the combination therewith of a secondary selector including straightr racks, a secondary key board having digit keys, means operated by said keys to successively move said racks to selective positions to set up digits in said secondary selector, meansoperated by said motor mechanism to successively zeroize the digits set up in the secondary selector by successively returning said racks unit by unit, means controlling operation of the item transfer mechanism in accordance with the action of the secondary selector, and means for controlling the stepping of the totalizer operated by a rack during the zeroizing operation on transfer from digit to digit at the end of the return stroke of said rack.

3l. A calculating machine including a primary section comprising item set-up mechanism, `a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of racks mounted side by side on said carriage and means for moving and positioning said racks to set up items; amovable carriage for said totalizer; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

32. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of racks mounted side by side on said carriage Vand means for moving and positioning said racksto set up items including a plurality of aligned stops; a movable carriage for said totalizer; means for actuating said item transfer mechanism in accordance with an item set up-in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same I[direction under control of said secondary section.

33. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of lengthened racks mounted side by side on said carriage, means ior moving and positioning said racks to set up items including a plurality of aligned stops and means to align the racks one at a time with the line of stops; a movable carriage for said totalizer; means for `actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

34. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of lengthened racks mounted side by side on said carriage, means for moving and positioning said racks to set up items including spring release mechanism and a plurality of aligned key-operated stops and means to align the racks one at a time with the line of stops; a movable carriage for said tota-liner; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

35. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of parallel racks mounted side by side on said carriage, means for moving said racks transversely to the path oi movement of the selector carriage and for positioning the racks including a plurality of aligned stops; a carriage for said totalizer movable independently of said selector carriage; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage under control of said secondary section.

36. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of parallel racks mounted side by side on said carriage, means for moving said racks transversely to the path of movement of the selector carriage and for positioning the racks including a plurality of aligned stops and means to align the racks one at a time with the line'of stops; a carriage for said totalizer movable independently of said selector carriage; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage under control of said secondary section'.

37. A calculating machine including a primary section comprising item set-up mechanism, a

totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of parallel racks mounted side by side on said carriage, means for moving said racks transversely to the path of movement of the selector carriage and for positioning the racks including spring release mechanism and a plurality of aligned key-operated stops and means to align the racks one at a time with the line of stops; a carriage for said totalizer movable independently of said selector carriage; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage under control of said secondary section.

38. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of straight parallel racks mounted side by side on said carriage, means for moving said racks transversely to the path of movement of the selector carriage and for positioning the racks and a plurality of indicator wheels mounted side by side on a common axis transverse to the racks and movable with the racks; a movable carriage for said totalizer; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

39. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of straight parallel racks mounted side by side on said carriage, means for moving said racks transversely to the path of movement of the selector carriage and positioning the racks including spring release mechanism and a plurality of aligned key-operated stops and means to align the racks one at a time with the line of stops, and a plurality of indicator wheels mounted side by side on a common axis transverse to the racks and movable with the racks; a movable carriage for said totalizer; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

40. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, movable members on said carriage, a plurality of coaxially mounted indicator wheels rotatable by said movable members, means for moving said movable members to set up and indicate items; a movable carriage for said totalizer;

- means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

41. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, a plurality of racks mounted on said carriage, a plurality of coaxially mounted indicator wheels geared to said rack and disposed side by side, means for moving said movable members to set up and indicate items; a movable carriage for said totalizer; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage in the same direction under control of said secondary section.

42. In a calculating machine, a guide, a carriage slidably mounted on said guide, a plurality of calculating members mounted in said carriage, means for automatically moving said members step by step comprising a rotatable shaft, a member continuously reciprocated during movement of said shaft, and means comprising a member movable by the calculating members into the path of movement of the reciprocating member to step the carriage.

43. In a calculating machine, a guide, a carriage slidably mounted on said guide, a plurality of calculating members mounted in said carriage, means for automatically moving said members step by step comprising a rotatable shaft, a member continuously reciprocated during movement of said shaft, and means comprising a pivoted member in the path of movement of said calculating members and movable into the path of movement of said reciprocating member to step the carriage.

44. In a calculating machine, a guide, a carriage slidably mounted on said guide, a plurality of calculating members mounted in said carriage, means for moving said members step by step comprising a rotatable shaft, a member continuously reciprocated during movement of said shaft, a totalizer carriage, means movable when a calculating member has a given position to cause movement of the reciprocating member to step the first-mentioned carriage and means responsive to the last mentioned movable means to move said totalizer carriage.

45. In a calculating machine, a guide, a carriage slidably mounted on said guide, a plurality of calculating members mounted in said carriage, means for moving said members step by step comprising a rotatable shaft, a member continuously reciprocated during movement of said shaft, a totalizer carriage, means for stepping the first mentioned carriage comprising a member movable into the path of movement of the reciprocating member due to movement of the calculating members, and means for stepping the totalizer carriage actuated by movement of the member movable into the path of the reciprocating member.

46. In a calculating machine including a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of racks mounted in said carriage, and means to move said racks to set up digits, the combination therewith of a rotatable shaft, means to return said racks unit by unit operated by said rotatable shaft and means for stepping said carriage comprising a ratchet mounted on said carriage, a pawl member, means operated by said shaft for reciprocating said operating member and means for interposing said control member between said operating member and said pawl member.

47. In a calculating machine including a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of racks mounted in said carriage, means to move said racks to set up digits, and means to return said racks unit by unit, the combination therewith of apparatus'for stepping said carriage comprising a ratchet mounted on said carriage, a pawl member mounted on said guide, an operating member, a control member, means for moving said operating member and means for interposing said control member between said operating member and said pawl member.

48. In a calculating machine including a casing, a guide mounted in said casing, a carriage slidably mounted on said guide, a plurality of racks mounted in said carriage, means to move .said racks to set up digits, and means to return said racks unit by unit, the combination therewith of apparatus for stepping said carriage comprising a ratchet mounted on said carriage, a pawl member mounted on said guide, an operating member, an electric motor connected to reciprocate said operating member, a control member and means operated by movement of said racks for interposing said control member between said operating member and said pawl member. y

49. In a calculating machine including a casing, a guide mounted inv said casing, a carriage slidably mounted on said guide, a plurality of racks mounted in said carriage, means to move said racks to set up digits, and means to return said racks unit by unit, the combination therewith of apparatus for stepping said carriage comprising a ratchet mounted on said carriage, a pawl member mounted on said guide, an operating member, positive acting means to reciprocate said operating member, a control member and means operated by certain one or more of said racks on their return strokes beyond zero position for interposing said control member between said operating member and said pawl member.

50. In a calculating machine comprising a primary selector, a primary key board having a single key for each digit, means operable by said keys for setting up digits in the primary selector, totalizing mechanism including a movable carriage, means for transferring items from the primary selector to the totalizing mechanism, motor mechanism, mechanism forming a power transmission connection between the motor mechanism and said primary item transfer mechanism, the combination therewith of a secondary selector including a movable carriage, said last-mentioned carriage being movable independently of said totalizer carriage, a secondary key board having a single key for each digit, means operated by the last-mentioned keys for moving and setting up digits in the secondary selector, means operated by said motor mechanism to successively zeroize digits set up in the secondary selector, and means controlled by the secondary selector for disconnecting said power transmission connection.

51. In a calculating machine comprising a primary selector, a primary key board having a single key for each digit, means operable by said keys for setting up digits in the primary selector, totalizing mechanism including a movable carriage, means for transferring items from the primary selector to the totalizing mechanism, motor mechanism, mechanism forming a power transmission connection between the motor mechanism and said primary item transfer mechanism, the combination therewith of a secondary selector including a movable carriage, said last-mentioned carriage being movable independently of said totalizer carriage, a secondary key board having a single key for each digit, means operated by the last-mentioned keys for moving and setting up digits in the secondary selector, means operated by said motor mechanism to: successively zeroize digits set up in the secondary selector, and means actuated by the secondary selector for controlling the operation of the primary selector and associated parts.

52. In a calculating machine comprising a primary selector, a primary key board having a single key for each digit, means operable by said keys for setting up digits in the primary selector, totalizing mechanism including a movable carriage, means for` transferring items from the primary selector to the totalizing mechanism, motor mechanism, mechanism forming a power transmission connection between the motor mechanism and said primary item transfer mechanism, the combination therewith of a secondary selector including a movable carriage, said lastmentioned carriage being movable independently of said totalizer carriage, a secondary key board having a single key for each digit, means operated by the last-mentioned keys for moving and setting up digits in the secondary selector, means operated by said motor mechanism to successively Zeroize digits set up in the secondary selector, and means actuated by the secondary selector for controlling said power transmission connection and shifting the totalizer carriage and the secondary selector.

53. In a calculating machine comprising a primary selector, a primary key board having a single key for each digit, means operable by said keys for setting up digits in the primary selector, totalizing mechanism including a movable carriage, means for transferring items from the primary selector to the totalizing mechanism, motor mechanism, mechanism forming a power transmission connection between the motor mechanism and said primary item transfer mechanism, the combination therewith of a secondary selector including a movable carriage, said last-mentioned carriage being movable independently of said totalizer carriage, a secondary key board having a single key for each digit, means including a plurality of racks operated by the last-mentioned keys for moving and setting up digits in the secondary selector, means operated by said motor mechanism to successively zeroize digits set up in the secondary selector, and means abutting against said racks for controlling movement of the totalizer carriage.

54. A calculating machine including a primary section comprising item set-up mechanism, a totalizer and item transfer mechanism; a secondary section comprising a movable selector carriage, aplurality of racks mounted side by side on said carriage and means for moving and positioning said racks to set up items; a carriage for said totalizer movable independently of the firstmentioned carriage; means for actuating said item transfer mechanism in accordance with an item set up in said secondary section; and means for automatically moving said selector carriage and said totalizer carriage under control of said secondary section.

CONRAD LUTTROPP.