US1270471A - Calculating-machine. - Google Patents

Description

J. C. WAHL.

CALCULA-HNG MACHINE.

APPLICAHON F|LED MAR.15.1916A 1,270,471'. Patented June 25, 1918.

11 SHEETS-SHEET l.

l. C. WAHL.

CALCULATING MACHINE.

APPLICATION F1Lz-:Dr'1AR.15,191s.

Patented Jun@l 25, 1918.

1l SHEETS-SHEET 2.

Mii/ 265565 M3 j; Edgy/Z Cv J. C. WAHL.

CALCULATING MACHINE.

APPLICATION FILED MAR. I5. IsII.

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J. C. WAHL.

CALCULATING MACHINE.

APPLICATION FILED MAR. I5. 1916.

Patented June 25, 1918.

1I SHEETS-SHEET 4.

J. C. WAHL. CALCULATING MACHINE. APPLICATION FILED' MAR.I5.1916.

Patented Jun 25, 1918.

J. C. WAHL. CALCULATING MACHINE. APPLICATION FILED MMI. I5. me.

Patented June 25, 1918,

Il' L l.

ll SHEETS-SHEET 6.

J. C. WAHL. CALCULATING MACHINE.

i A`PPL|cAT|oNl FILED MAR. 15. me. Patented Jne 25, 1918.

ll SHEETS-SHEET 7.

J. c. WAHL. CALCULATING MACHINE.v

APPLICATION FILED MAR. I5.' 1946. 1,270,471'. Patented June 25, 1918.

J. C. WAHL. CALCULATING MACHINE. APPLICATION FILED MAR. 15, |916.

Patented June 25, 1918.

l1 SHEETS-SHEET 9.

PatentedJ une 25, 1918.

l1 SHEETS-SHEET IO- ZZZUe/"C-' /f/V Cf J. C. WAHL.

CALCULATING MACHINE.

APPLICATION FILED MAR. |51 1916. 1,270,471 Patented June 25, 1918.

ll SHEETS-SHEET Il.

UNITED sirarns rai-ENT onnion.

JOHN. C; WAI-IL, OF CHICAGO, ILLINOIS, iSSIGNOR, BY MESNE ASSIGNMENTS, TO THE COMPANY, OF ILIVIINGTON, DELAVARE. A CORPORATION OF DELAWARE.

CALCULATING-MACHINE.

Application le March l5, 1916;

To all whom t may concern:

Be itl known that I, JOHN C. WAHL, a

citizenofl the UnitedI States, residing at Chif cago, in the county of Cook and State of Illinois, have invented certain new and use;- iul Improvements in Calcnlatingfldachines, oi which the 'following is a speciicat-ion.`

My invention is an improvement in calculating machines designed to perform verticalandj horizontal additions and subtractions. The object of my invention is the provision oit an improved calculating inacl'iinewliich willV automatically add and subtract numbers as theyv are arranged in hori` zontal lines and siniultaneously add them in vertical columns. Further, the object of my invention is to provide various interloclrs and safeguards of operation to the end' of' guarding against accidental mis-opere` tion ci my improved' machine by the operator. n

Another object of my invention is the provision of improved connecting means between the vertical` and cross totalizers which,

when used in conjunction with my improved tabulating device, will prevent rebounding of the cross totalizer carriage when the same is intermittently connected t0 the typewriter carriage. These and other objects of my invention will be hereinafter described and claimed.

My invention is shown attached to a Reniington typewriter which is provided with the usual set of letter keys, and therefore my machine mayv be used to compute num'- having alphabetic legends associated therewith.

lily invention may be best understood by reference tothe accompanying drawings, ot which- Figure 1 is a front view.

Fig. 2 is a side view.

Fig. 3. is a front view ol the actuator with the covers removed.

Fig. l: is av perspective of the operating mechanism, showing links joining vertical und cross actuators.v

Fig. 5 is a back view of the actuators.

Fig. 6 is a section on line 6-6 oi' Fig.

Fig. 7 is a section on line '7 7 of Fig. o.

Fig. 8 is a view of the left end of the actuator (F ig. l) showing certain levers for Specification of LettersPatent.

Patented J une 25, 1918;. Serial No. 84,340. n

changing the direction of rotation of themaster wheels.

Fig. 9 ie` a plan viewV of actuator partly inv sect-ion, also omitting parts.

Fig. l0 is-'a perspective of ball bearing rack movement.

Fig. ll is a section on line 11-11 of Fig. 6.

Fig. l2 is a back view of the cross truck showing spring'connection.

Fig. 13 is a'bott-om pla-n view of cross truckshowing locking lever, section 13%13 Of 6.

Fig.' le is a section on an enlarged scale tekenen line M l'e of Fig. 3 showing cams operating leversv which differs from Fig.

Fig. l5 is a section on line 14S-15' of Fig. 'i6 is a section on an enlarged scale taken on line It-16 of Fig. 3.

Fig. l? is a perspective of gear shift mechanism.

Fig. 1S is a perspective of a certain part` of Fig. 17', showi'ng'parts disconnected.

FigQ i9 is a perspective of correcting lever.

Fig. 2O is a section on line 20-120 of Fig. 5.

Fig. 21 is a perspective of locking and trigger mechanism.

Fig. 22 is a perspective of pickup beam and its related parts.

Fig. 23 is a perspective of parts shown in Fig. 22, showing their relation to eachA other.

Fig. 2e is a view of the back ofthe typewriter showing the means for preventing rebound of the typewriter carriage when it is advanced by operation of a tabulator key.

Fig. 25 is a detail of parts shown in Fig. 24.

Fig. 26 is a detail oi' the parts shown assembled in Fig. 22.

Fig. 27 is a perspective view oi' the cross gear shift lock.

Since the structure of my improved machine is complicated owing to the great varietyv ol. calculations which may be performed by it, I will divide the description of it into various chapters, dealing with particular portions of the machine in each.

In general my machine may be described as the machine disclosed in my issued Patent No. 893,719, plus a second actuator adapted to enter simultaneously into a second or cross totalizer the number entered into the vertical totalizers shown in said issued patent. This second or cross actuator is controlled by gear shift devices which serve to determine the direction in which a number shall be entered into the cross totalizer. These gear shift devices may be governed either manually by the operator or automatically by the motion of the typewriter carriage, on which are mounted the vertical totalizers, thus determining when each vertical totalizer enters a zone of calculation how the number entered in said vertical totalizer shall be entered in the cross to- ,talizen The typewriter.

The typewriter 30 is an ordinary Remington typewriter and is preferably equipped with a decimal tabulating mechanism of any suitable form. This typewriter is provided with the usual set of letter keys 31 and a set of figure keys 32. All of the keys are connected to suitable type bars 33 which are adapted to print upon a platen 34 in the usual way. This platen is mounted upon a carriage 35 which is given a tendency to travel toward the left by means of the usual spring tension device (not shown), and the travel of this carriage is controlled by reason of the fact that a rack 36 attached to the carriage 35 gears into a pinion 37 rigid with a double escapement wheel 38. The rack 36 is not rigidly attached to the typewriter carriage, but is supported thereon by arms 39 pivoted on the carriage at 40, and held in a position shown in Fig. 2 by a spring not shown. The escapement wheel 38 is given a tendency to rotate by the carriage spring, but such rotation is prevented by the escapement pawl 4l which is operated by a pull rod 42 leading to a pull crank 43 mounted on the frame work. A universal bar 44, which extends beneath all of the typewriter keys 3l and the figure keys 32, is suspended from `the crank 43 and is adapted to be moved by any of said keys. Springs 45, each attached between the keys and the framework 29, serve to hold these keys, which are pivoted on a universal rod 46, in their normal position. Depression of any typewriter key, as for instance, the numeral key 32, will therefore result in printing the character associated with said key on the platen and actuating the escapement, thereby permitting the carriage to escape one step to the left.

The typewriter 30 is equipped with tabulating mechanism of any suitable form. The particular tabulating mechanism which I have illustrated is the form commonly used with the Remington typewriter, but I wish to be understood that any other tabulating mechanism may be substituted for the form shown. The typewriter' is equipped with a set of tabulating keys 47, Figs. l and 2, these keys being on the ends of rods 48, which have their front bearing in the frame work 29 of the machine and their rear ends attached to tabulator stops 49, which are pivotally mounted on a shaft 50 rigid in the frame work 29. Each key 47 is associated with a tabulator stop 49. These stops are adapted to coperate with a series of tabulating lugs 5l which are mounted on a slotted bar 52 mounted on the typewriter carriage. The lugs 5l are placed at a distance apart equal to the ordinary pitch of the typewriter, that is, one-tenth of an inch. |These lugs in their normal positions are so placed on the bar 52 that they will not contact with any of the tabulator stops 49 when it is operated by its associated tabulating key 47. However, in setting up 'the machine, certain of the lugs 51 are displaced to correspond with the particular set-up of the `vertical totalizers. Then manipulation of any tabulator key will release the typewriter carriage from its escapement and said carriage will move to the left until stopped by contact of one of the lugs 5l with a protruding tabulator stop 49.

Each of the tabulator rods 48 is provided with a lug 53 adapted to contact with a bail 54, which is thus actuated by any of the tabulator keys 47. The bail 54 is supported from arms 55 which are pivoted on the framework at 56. The arm 55 is joined by a push rod 57 pivoted on said arm at 58 to a crank arm 59 pivoted on the universal rod 46.

Rigid with the crank arm 59 is an arm 60, which is connected by a pull rod 61 to a rocking frame 62 pivoted in the framework at 63. Rotatably mounted in the framework 62 is a gear 64, which is adapted to be brought into engagement with the typewriter rack 36 when the frame 62 is tilted each time the typewriter carriage 35 is tabulated. Engagement of the gear 64 will raise the typewriter rack from engagement with the escapement pinion 37. This will of course free the carriage from the escapement and said carriage will move to the left until arrested by the protruded tabulator stop. If it is desired to govern the motion of the carriage when the same is tabulated, a governor of any suitable form adapted to be actuated by the gear 64 may be attached to the typewriter. The slotted bar 52 has a tabulator lug 51 in each slot, and coperating with these lugs is a pawl 65, pivotally mounted at 66 in the upright post 67 mounted in the frame work 29. A spring 68 gives the pawl a tendency to engage the lugs 5l. However, a tail 69 on the pawl 65 contacts with an arm of the frame 62, (Fig. 25)

and serves to hold thc pawl 65 out of engagement with said lugs 51 until the typewriter carriage is tabulated. llilting of the frame 62 by means of the rod 61 will permit the pawl (35 to come into engagement with the lugs 51 and to hold the typewriter carriage 35 securely against rebound when it has been arrested by protruded tabulator stop 49. The necessity for preventing the rebound of the typewriter carriage will be apparent from the description of the action of the cross actuator hereinafter to be described.

The oef/'tical actuator.

The functions of the vertical actuator are:

1. Upon depression of any numeral key to operate certain universal members which have functions which are necessary to the operation of any numeral key.

2. To perform certain universal operations in the totalizer.

8. To rotate the master wheel a number of steps corresponding to the particular numeral key which is operated.

l. To lock the master wheel in its new position and return the universal parts to their normal positions.

5. To permit the spacing of the carriage to the next lower decimal place.

Connected to the above enumerated operations of the keys are several other functions, such as the single key mechanism, the object of which is' to preif'ent the operation of more than one key at a time, the full stroke mechanism which compels a full stroke of a numeral key when once a stroke is initiated, the truck lock which serves to lock the typewriter carriage upon which the vertical totalizers are mounted immovably to the frame work during the depression of any key, and other functions hereinafter to be described.

Each of 'the keys has connected to it a pull rod 7 O (Figs. 1 and 2), which leads to a set of fans 71 which are rotatably mounted on a shaft 72 in thev framework of the upper actuator'. There is one of those fans 71 connected to each of the typewriter numeral keys. Each of said fans has on it a concentric cam surface 7 3 having a` nose 7st and a heel 75 (Fig. 14). The nose 'Tft adapted, upon rotation of the fan, to engage with a roller 76 which extends the entire length of the upper actuator and which is adapted to be engaged by any of said fans 71 as they are rotated by their attached pull rods 70. The roller 7 6 is mounted on a rock shaft 77 by arms 78 and 79 (Figs. 4f and 14). and the rock shaft 7 7 is rotatably mounted in the framework 29 of the machine. On the rock shaft 77 is mounted the helical cam 80 serving to operate a shifter 81 slidably mounted in the frame work. The rock shaft operates in the following cycle upon depression of any .key 32. The nose 7i of any of the actuated fans 7l' first. as said fan is rotated in a' counter-clockwise direction on depression of the key 32, contacts with the. roller 7G and thus rotates the rock shaft 7 7 in a clockwise |direction. This continues until the roller'76 has reached the concentric surface 73 of the fan '71. The rock .shaft 77 is therefore held stationary during the travel of the fan through the angle embraced by the nose Tet on one side and the heel 75 on the other. As the rotation of the fan 71 continues, the rock shaft 77 which is under spring tension (in a manner hereinafter to be described) escapes from the heel 75 andl snaps back to its normal position as shown. in Fig. 14. Upon the upst'roke of the key. the heel 75 of the fan '71 engages the roller 76 and rotates the rock shaftv 77 in a counter-clockwise direction. Following this engagement there ensues a period of no niotion of the rock shaft corresponding to the engagement' of the cam 73 with the roller 76, and upon the 'fan reaching its normal position shown in Fig.' 14, the rock sha-ft 77V snaps to its normal position co-incident with the arrival. of the fan 71 to its normal position, which is co-incident with the return of the typewriter numeral key 32 to its normal position.

To sum up this motion of the rock shaft,-on the down stroke of the typewriter key, it is first rotated in a clockwise direction through a certain angle, then follows a period of rest, and then a quick return to its normal' position. On the upstroke of the key the rock shaft is rotated through an angle in the contrary direction. then follows a period of dwell. and then an escapement of the rock shaft to its normal position co-incident with the arrival of the typewriter key in its norma-l position. The object of these various motions of the rock shaft will be hereinafter described.

Rotatably mounted in the framework of the machine is a sector shaft 82 upon which is mounted a` series of arms numbered 91 to 99 both inclusive. by means of which said sector shaft S2 may be rotated. Rotatabll.' mounted on the shaft 72 is a set of goosenecks 83. there being a gooseneck 83 associated with each fan 71. Rigidly mounted in each gooseneck is a pin. S4 which is adapted to be. engaged by the edges of an openingi 85 in each fan 71. As said fan is turned by the depression of a key 32 the rock shaft 77 will first be rotated through an angle by the nose 74 after which a side of the slot 85 will contact with the pin 84 and thereafter rotate the associated gooseneck with the fan 7l during the time when the roller 76 is on the concentric portion of the cani 78. On each gooseneck is a cam surface 8G, which adapted to Contact with and rotate a roller 87 mounted in each of the arms 91 tok 99 inclusive. Engagement of the cam 86 with the roller 87 will therefore rotate the sector `shaft 82 until the roller 87 reaches a concentric slot 88 which' is in each gooseneck. Further rotation of a gooseneck will therefore serve to maintain the sector shaft in its then displaced position. The arms 91 to 99 inclusive are spaced on the sector shaft 82 in spiral arrangement, the arm 91, for instance, being so spaced that when said arm is operated by its associated gooseneck 83, the sector shaft`82 will be rotated the space of one unit. Whenl the roller 87 mounted in the arm 92 is engaged by its sociated gooseneck 83, the sector shaft 82` will be rotated a space of two units, and so on.

To sum up what has gone before, depression of any typewriter key will rst result in the rotation of the rock shaft 77 through a certain angle, then, during the time occupied by the roller 7 6 on the concentric part of the cam 73, the sectorv shaft 82 will be rotated through an angle which is proportional to the number key which has been operated. At the completion of the down stroke of the key, the rock shaft 77 will return to its normal position, due to the fact of the roller 76 escaping from the. heel 75. However, since the fan 71 is still displaced. the sector shaft `82 will remain in its displaced position, the roller 87 being held in the concentric slot 88 of the particular gooseneck operated.

l will now describe the mechanism by means of which this differential motion of theV sector shaft 82 is communicated to a master wheel. Reference, particularly to Figs. 3, 14 and 15, will disclose that a block 89 is rigidly mounted on the sector shaft 82. Pivoted to this block by a bolt 90 is a sector 101, the above described mounting having for its object to render the sector rigid to the shaft 82 as far as rotation is concerned, but transversely movable thereto owing to the fact of the sector being pivoted on the bolt 90. The sector 101 is embraced by a slot 102 in the shifter 81, which is reciprocatingly mounted in the framework. A second slot 103 is engaged by the helical cam 80 rigid on the rock shaft 77. The sector 101 is adapted to mesh with either a gear 104 or a gear 105 according to the position of said gears as determined by a gear shaft arrangement hereinafter to be described. However, the sector when at rest is out of mesh with both said gears, being in a tilted position in respect tothe sector shaft 82. The preliminary motion of the rock shaft ensuing upon the firstpart of the down stroke of the key, by means of the helical cam 80 shifts the shifter 81 to the left. thereby bringing the sector 101 in a position at right angles to the sector shaft 82. When in this position the sector may be in mesh either with the gear 104 or the gea r 105, as determined b y the gear shift device. Upon rotation of the sector shaft 82 by the particular gooseneck which is associated with the operated fan 71, a motion will be communicated by the sector 101 to the gear 104 or 105, which at that time happens to be in mesh therewith, and this rotation will be proportional to the displacement of the sector shaft 82, which in turn is proportional to the particular numeral key which has been operated.

It will be remembered that upon the completion of the down stroke of the key the rock shaft 77 instantly returns to its normal position. This will result in rotation of the helical cam 80 to its normal position, and the return or the shifter 81 and the sector 101 associated therewith to their corresponding normal positions, as shown in Fig. 3. Upon the back stroke of the key the sector shaft 82 will be rotated, owing to the return of the gooseneck in engagement with said sector shaft 82 to its normal position, yet this backward rotation will not be communicated to the gear 104 or 105 since the sector 101 will be out of mesh with either of said gears on its back stroke.

I will now describe the means by which motion of the gears 104 or 105 is communicated to a master wheel. The vertical master wheel 106 is rigidly mounted on a shaft 107 which turns in the framework. Slidably, but non-rotatably, mounted on said shaft is the gear 104 before referred to. 1n the hub of this gear is a groove 108 engaging in which is a stud 109 mounted in a lever 110, which is pivoted at 111, in a post 112 mounted in the frame work 29. The gear 105 is rotatably mounted on a rod 113 which is slidably mounted in the frame work. The gear 105 (Fig. 17 has in it a groove 114. A stud 115 mounted on the lever 110 engages this groove and serves to transmit motion of the gear shift rod 113 (Fig. 17) to the gear 104. In one position of the gear shift rod 113, the gear 104 is in a position to be engaged by the sector 101 when the same is operated by the rock shaft 77. This corresponds to the subtraction position of the vertical actuator, and is theV position shown in Fig. 3. When the gear shift rod 113 is moved to a second position the gears 104 and 105 are in line with each other and the sector 101 will engage neither of them when the sector shaft 82 is operated. This corresponds to a disconnect position of the vertical actuator. When the gear shift rod 113 is in a third position, the gear 104 is moved into the path of the sector and the gear 105 is moved into a position in which the sector will not engage said gear. This position corresponds to the addition position of the vertical actuator. Obviously the system comprising the two gears 104 and 105, the lever 11() which connects these gears, and the rod 113 constitutes a gear shift device and serves to transmit the motion of the sector 101 to the master Wheel 106 in a manner determined by the position of said rod 118.

Having described the gear shift arrangement. l Will nov.T describe universal m0- tions which takc place before and after a rotation of the master gear. 'These universal motions occur upon the actuationof any figure keyY and are therefore motions Which occur er take place each time a digit is put into a totalizer. Y

The first one of these motions is the motion which operates the master dog, this dog` serving in a manner hereinafter to be described to perform certain operations .in the totalizer, and also to lock the truck carrying the totalizer rigid with the frame of the machine during the insertion of a number. The rock shaft 77 has rigid lwith it a crankarm 116 which servesltoactuate a link 117 pivoted at 11S. r1`he upper end of this link has in it a slot 119 Which engages a pin 120 mounted in a master dog cam 121 which is rotatably mounted in the frame work on a shaft 122. A master dog 123 is rotatably mounted inthe frame Work on a shaft 124, and has a horizontally eX- tending portion 125 which serves the purpose of a truck lock, and a vertical arm 126 Which operates upon the swinging arms of the totalizer as hereinafter to be more speciically described.

Mounted on the masten dog 123 is a roller 127 which is engagedby a cam. surface 128 in the master dog cam'121. Rotation of the rock shaft in a clockwise direction, Fig. 14, will result in upwardmotion of the link 117 and consequent rotation of the master dog c am 121m a clockwise direction. The action of the cam surface 128 on the roller 127 will rotate the master dog 123 in a counter-clockwise direction, the vertical arm 126 serving to lift the swinging arms of the tota-lizer in a manner hereinafter to be. described, and the-truck lock to engage between the teeth of a rack 129 rigidly mounted on the vertical truck 130 which serves as a Asupport for the verf tical totaliaers. From the immediately' preceding description..it vwill be apparent that depression of any numeral key 32 will ultimately result in a counter-clockwise rotation of the master, dog and the consequent locking of the truck 130 to the typewriter frame 'during the time When 'the truck lock is between theteethY ofthe rack-129. This motion of the master dog 123 takes place duringthe tirstpart of the down stroke of the key. `Following this motion comes 'the vdifierential rotation of the master wheel 106, and then as the rock shaft escapes from the heel 7 5 of the cam '73, the master dog suddenly returns to its normal position and the carriage 35 4then escapes to the next following decimal place.

Another universal motion is the motion of the master pawvl, this paivl serving'to definitely aline the master Wheel in its position during the time when said Wheel is not'being rotated by a depression ofthe keys.

Inspection of Fig. 4 Will show that the rock shaft 47 7 has on it a crank arm 131,'in Which is mounted a pin 132. As the rockshaft isrrotated in aclockyvise dire'ctionthe pin 132 IWill encounter the cam surface 133 of the master pawl 134, Whichis mounted on a shaft 135 pivoted in the framework. vrIhe pawl 134 is provided Witha nose 136 Which is adapted to enter between and alineV the teeth ofthe master Wheel 106. The vpreliminary motion of the rock shaft Willrotate the master pawl 134 out of engagement with the `master Wheel 106, leaving said Wheel -*free to rotate. Upon the completiony of the down stroke of the keypand coincident with the return4 of the rock shaft 77 to its normal position, -the master paWl 134 Will return to its position of engagementwith the master Wheel 106. A spring 137 (Fig. 14) one end of which is attachedto the master pawl 134, andthe other end to the fran'ieiyvork Reference to Fig. 14 Will disclose that each one of the fans 71 is provided with a set of ratchet teeth138 and 139, these. teethzpointing in opposite directions. vA shaft 140 has mounted on'ita down lfull-stroke paWl 141 extending theentirelength of the Vertical actuator. i This pawlv is adapted 'to` contact with an;v of thev teeth 138 andfthusfprevent the direction of motion of the numeral key ,being reversed upon the downstroke thereof.

Thev paWl 141 has rigidly attached thereto a. piecev142 having a cani 143 adapted to contact With and be rocked by an arm 144 rigidly attached to the rock shaft 77. Vfh'en the rock shaft 77 is in its normalV position, the parts are in the positionshown in4 Fig. 14, and the full stroke paivl is in a position to engage thek ratchet teeth 138 onany one of the fans 71. When the rocksh'aft thrown to its forward position uponthe completion' of the 'don-n 'stroke of the key, the

"armi 144 rotates an armm145 Which is rigi1U??kattached"to 4al shaft 146 on which is inountedtheup full-stroke pau/1147. This `paiyl 147, llike the pawl 141, extends the entire length'of the actuator and is adapt-ed to contact with the teeth 139 upon any of; the fans 71.. 1n consequence, upon the prelimiy nary motion of the rock shaft 77, the pawl 147 is rotated in a counter-clockwise direction, Fig. 14, and therefore does not interfere with the motion of the fan 71, for the reason that the point of the pawl 147 is thrown out beyond the teeth 139. 0n the down stroke of the key, the down full stroke n the key, the heel 75 of the fan 71 engages the lroller 76 as before noted, and rotates the rockshaft 77 in a counter-clockwise direction. This results of course in the rotation of the arm 144 rigid in the rock shaft and its lifting of the down full stroke pawl 141 out ofthe way of the teeth 138 and permits the Spring 148 which extends between `the down full stroke pawl 141 and the up full stroke pawl 147 to bring said pawl 147 into contact with the teeth 139. These teeth prevent the downward motion of the key 32 until the upward motion has been fully completed or until the roller 76 has escaped from the nose 74 ofthe cam 73 on the fan 71. `The rockshaft then returns to its normal position and the parts are in position for a second downstroke of the key.

n It will be apparent that the full stroke mechanism just described is for the purpose of preventing an incomplete stroke of any numeral key 32. When once a motion of any of these keys has been initiated the motion must be completed to the end of the down stroke and then to the end of theupstroke before the motion of any other key may be initiated. This full stroke mechanism is of great value in preventing faulty manipulation of the machine.

Another universal motion which takes place in the vertical actuator is that of the single key mechanism which has for its object the prevention of the operation of more than a single key at one time.

Referring particularly to Figs. 5, 14, and 15, it will be seen that each of the fans 71 has a nose 149 which is adapted to engage the single key cams 150., These cams are rotatably mounted in the frame work on small shafts 151, and each end of the series of cams 150 is constrained against the frame work 29 so that in the whole series there shall be a vacant space the width of any one of the fans 71. Upon rotation of `any fan by reason of depression of a typewriter numeral key 32, the nose 149 will enter between two of the cams 15() and this shaft to its normal position.

will take up all the lost room between the series of cams and the frame work. The operation of a second key while one key is down will be prevented since the nose 149 of the second operated fan 71 will be unable to force its way between its two contracting cams 150.

I will now describe the means b y which the rock shaft 77 is held in its` normal position. Pivoted on the frame work at 152 and 153, (Fig. 16), are the rock shaft locating arms 154 and 155. These arms are held by a spring 156 in contact with the stud 157 mounted in the frame work. The roller 76 attached to the rock shaft 7 contacts with both arms 154 and 155. lNhen the rock shaft is rotated in a clockwise direction, the arm 154 will be displaced and the spring 156 will tend to restore the rock On t-he back stroke of the key when the rock shaft is rotated in a counter-clockwise direction` the arm 155 will contact with the roller 76. and the spring 156 will tend to bring said rock shaft int-o its normal position. It will thus be seen that the rock shaft 77 may be rotated in either direction from its normal position and the spring 156 will always tend to bring said shaft to its normal po sition, as shown in Fig. 16.

In order to bring together all of the various operations given in the previous description of the upper actuator, l shall now describe the cycle of the actuator parts ensuing upon the depression of any numeral key, for instance, the 9 key, assuming that 9 is to be put into the totnlizer in addition.

Upon the iirst part of the depression of the key, the rock shaft 7T is rotated in a clockwise direction by the action of the nose 7 4 of the fan 71 associated with the 9 key. This rotation of the rock shaft 77 is resisted by the spring 156 and results,

1st, in the withdrawing of the nose 136 of the master pawl 134 from the master wheel 106, and l 2nd. In the rotation of the master shaft 124 in a counter-clockwise direction, Fig. 14, thereby locking the truck 130 carrying the Vertical totalizers rigid to the frame work nand by vmeans of the vertical arm 126 perupon the depression of any key is the action of the supplemental aliningpawl 158. Since the action of this4 pawl is exactly like the action of the pawl 56 in Fig. of my issued Patent #1,118,733. v August 31st. 1915. it is umiecessary to describe this action herein. The object of this supplemental alining pawl is to assist in removing; the spiral etl'ect troni the totalizer.

llt thc time the preliminary motion ot the rock shaft has been con'ipleted, that is7 when the roller 76 has reached the dead surface of the cam 73j the slot 85 in the 'fan 71 has contacted with the pin 8s*- in the gooseneck associated with the 9 key.

Further depression of the 9 numeral key results in further rotation ot the fans 71 and the slot Scomes in contact with the .pin 84y thereby operating` the one ot' the goosenecks S3 which. rotates the sector shaft 82 the distance of 9 spaces. This rotation of the sector shaift is communicated by the sector 101 to the gear 105 and by saidl gear to the master wheel 106. lVhen the key reaches the bottom of its down stroke. the roller 76 escapes trom the heel l5 off 'the cam on the tan 71 and the spring` at once snaps the rock shaft back to its noi:- inal position. This results in the shifter Sl withdrawing the sec-tor 101 from theg'ear 105 and the unlocking` of the truck 130 by rea-son of the return of the master dog` 1:23 to its normal position. It also results in the rengageinent of the master: pawl 134 with the master wheel 106. The sector shaft S2, however. remains in its displaced position due to the engagement ot the roller 87 in the concentric slot S8. The 9 key now starts on its return to its norn'ial position yby reason ot the action of one oi the spring-s 115, and the rock shait now rotated in i counter-clockwise direction by reason of the action of the heel 7 5 on therolle'r 7 6j. This results in the withdrawal of the down full stroke pawl 141 from contact with the teeth 138 and the engagement of the upper full stroke pawl 147 with the teeth 130. )is the key returns to its normal position. the l`{rooseneck 83 is returned to its normal position and the sector shaft is returned to its normal position due to the tension roi a, spring' 159 extending` between the traine work and the sector lsha-lit returns said shaft to its no'rinal position.

The cross actuator.

. tuatori's intended to be operated at the same time the 'Vertical actnatorpand by ,the de pression 'of ingle key' s1-nce, as will. be

hereinafter 4pointed out, a large nlnnber ot operations are to be pcrt'orined with my machineinyolying the simultaneous entry of a number into both a vertical and the cross totalizer. lt will not be necessary to go into an extended description ol: the cross actuator since a large number ot its parts are substantially duplicates ot the vertical actuator.

ln Fig. lis shown a perspective View of the connection between the two actuators.

' The crcss actuator is provided with -a rock shaft 160 and a sector shaft 161. thesetwo shafts being similar in function to the rock shaft 77v and the sector shaft 82 of the vertica-l actuator. A parallelograin link connection between the two shafts insures their moving in sync-hronism. This link conncck tion may be rdescribed in detail by noting that (Fig. 4) the sector shaft 82 has rigidly attached thereto a crank arm 162 and the sector sha-ft 161 has rigidly attached thereto a crank arm 163. These crank arins are oit' equal, length andare set parallel to cach other. A link 164 serves to connect the two arms and Since the crankarins 162 and 16? are ,equal and parallel, the motion ot' the yertical sector shaft 82 will he exactly reproduced by the rcross sector shaft 161. The rock shafts 77 and 160 are connected in a similar manner. A crank arni 165 rigid Ato the rock Shaft 77 and the crank arni 166 is rigidpto the-cross rock shaft 160. These crank arms are equal and placed on 'their respective shafts so als to be parallel to each other. A link167 serves to connect the two crank arms y1.065 and 1,66 and theretore the motion of the rock shaft/77 exactly reproducedby the rock shat't 160. The secteb shaft 161 has mounted thereon a sector 168 which is similar to the sector' 101 ot the verA tical actua-tor. The motion of this sector is controlled by thehelical cam 169 which controls a shifter 17 0. these parts bein;y similar to the corresponding' parts ot the/vertical actuator. The sector 16S is adapted to engage either vthe 'gears 171 or 172W. these gears correspondingv in position and 'func- Ation tothe gears 10ft and 105 of the verl ical actuator.

fPivoted in the Atrame work f2.9 on a post 173 (FigswlO and ,lll is a bar l7f-lwhich has the saine :Function in respect to the nears 171 and 179i. as the bar 110 hes to the sears 104i 4and 10S/ot' .the vertical actuator.`V lv means of either the gear 171 or the gear ll.` motion of the sector is communicated to the cross master wheel 175s and this inastei` wheel serres ,to transmit the motion as determined by the numeral key into the cross totalizer.` Y Obviously this motion will be transmitted either in addition or subtraction accordingly ,als the sector 16S Y l1.7".'f3for the gear 1 71 The these gears is determined by the position of the cross gear shift rod 176. The position of this rod is controlled by the gear shift mechanism which will be hereinafter dcscribed in a special chapter. It will suffice for the present to say that the gear shift rod 176 may occupy any one of three posi tions, thereby determining that the master wheel 175 of the cross actuator shall rotate to determine addition or the master wheel 175 shall not rotate at all or shall rotate in a direction to determine subtraction,l these rotations, it is assumed, occurring in consequence of the operation of any of the numeral keys 32. Operation of this rod 176 is precisely similar to that of the gear shift rod 113 of the vertical actuator. Both, by their positions, serve to determine first, whether or not a number should be inserted in their associated totalizers and second, if the number is inserted, whether such nu1n ber should be inserted in addition or subtraction.

The cross actuator is also provided with a master dog 177 (Fig. 9) and a master pawl 17 8, these two members being controlled by the rock shaft 160 in precisely the same way as the master dog 123 and the master pawl 134 of the vertical actuator. These two parts have the same function on their associated master wheels and cross totalizers as the corresponding parts have upon the master wheel and totalizers of the vertical actuator. It. will therefore not be necessary to herein insert an extended description of their operation.

At this point it will possibly be worth Vwhile to recapitulate in a general way the operation of the previously described meclr anisms. fe have started with the numeral rey and traced the action of' said key into producing differential rotation of the `vertical master wheel 1 06 and the cross master wheel 175. We have also seen how depression. of the key produces certain universa] actions, that is, the single key mechanism, the full stroke mechanism, the mas# ter dog, and master pawl actions. The master dog and master pawl actions are repeated in the cross actuator, since they are necessary, the one to operate on the cross totalizer and the other to operate on the cross master wheel 17 5. However, the full stroke and single key actions are not necessary to the cross actuator since controlling the action. of the key in these respects from lthe vertical actuator will be sufficient.

We have also seen that the motion of the vertical master wheel 106 kand the cross vaast-er wheel 175 is controlled by the posi,- tion ofthe gear shift rods 113and 176, these rods determining each for its associated master wheel whether or not said master wheel shall rotate te produce additiointo prednee sribarsetieng es net 'estate all? this latter case corresponding to the operation of a numbers being simply copied out of the totalizer without withdrawing it.

The t0 mlz'eers.

The vertical totalizers 179, 180, 181 and 182 are mounted slidably on a truck 130. This truck is supported by a roller 183 which is mounted on a shaft 184 which rotates in a bearing 185 inserted in the framework 29 of the machine. A roller 186 turning on a stud 187 serves to maintain the section 188 of the truck 130 in contact with the side of the roller 183. Thus, the lower side of the truck 130 is completely constrained by these two rollers. The upper side of the truck 130 has formed on it an upwardly projecting flange 189, which contacts with a roller 190 rotatably mounted in a bearing 191 in the frame work 29. The axes of the rollers 190, 183 and 186 are in the same plane 'pas the master wheel 106. Thus, the truck 130 is supported in practically one line in at the ends and may have some slight motion in respect to its connections to the typewriter carriage, the necessity for maintaining absolute parallelism between the truck bearings and the bearings of the typewriter carriage is avoided.

The truck 130 has mounted thereon arms 192 and 193, Fig. 1, these arms being adjustable by means of screws 194 and 195 respectively. Angled pieces 196 and 197 are attached to the carriage 35 of the typewriter and screws 198 and 199 serve to connect the arm 192 to the piece 196 and the arm 193 to the piece 197. The holes in the arms 192 and 193 are oblong for the purpose of permitting some slight relative motion between the truck 130 and its connection to the typewriter carriage 35. Since the typewriter carriage escapes step by step upon the action of the numeral keys, the truck 130 will by means of the above recited connections be advanced step by step also. The truck 130 has in its forward side, Fig. 14, dove- tail sections 200 and 201, these sections serving to form a sliding support for the vertical totalizers.

Vllhe totalizer wheels are mounted between the two side plates 202 and 203, Figs. 1, 3 and 14, in which are dove tails 204 and 205 to tit with the dove tail sections 200 and 201 of the truck 130. A rack 206 is fastened to the truck and has teeth corresponding to the pitch of thetypewriter escapement rack 36.. is ath of en irren, that is;

ten teeth to the inch, although any other pitch may be used if the spacing of the totalizers is accordingly changed. rlhe totalizer is held in its position by a latch 203, (best shown in lFig. 14) mounted on the shaft 209 -pivoted in the side plates 202 and 203 and is held in contact with the truck 130 by a spring 210 which extends between a stud 211 in the latch 203 and a stud 212 in the plate 202. On the forward end of this latch is a finger piece 213 which serves to operate 'the latch 203. The rear portion of the latch has a hook 214 adapted to engage the dore tail section of the truck 130 and a tooth 21'5 which enters the teeth of the rack 206 and thereby prevents the lateral motion of the totalizer as a whole. The hook 214 serres to locate the dove tail in the bottoni of the totalizer side plates firmly against the dove tail section of the truck 130, and the tooth 215 prevents lateral movement. Thus the totalizer is held securely against motion relative to said truck. The totalizer side plates 202 and 203 serve as supports for shafts 215, 217, 213, 219, 220, 221` and 223. The shaft 219 which is rigidly connected to the side plates serves as a support for the totalizer carrying wheels 2:24 which are rotatably mounted on said shaft. rllhese wheels are provided with 30 gear teeth 225, a lockingv disk 226, having three. passing` scallops 227, and three carrying teeth 228. ln the plane of the teeth 225 is an idler gear 229 rotatably mounted on the shaft 220, and which serves to communicate the motion of the carrying wheel 224 to a gear 230 which is rigid with a totalizer number wheel 231, rotatably mounted upon the shaft 221. rihe carrying` teeth 228 engage the gear 232 which is mounted on a stud 233, carried in a swinging arm 234, which is free to turn upon the shaft 216.

gid with the gea r 232 is a star wheel 235 which is in the same plane as the locking disk the passing scallops 227 permitting one step motion of this star wheel 235 whenever the same shall have been actuated by the engagement of the carrying teeth with the gear 2 At other times the star 0.4. wheel 235 is held locked against motion owing to the engagement of the concave portions of the star wheel with the round surface of the locking disk Rigid with the star wheel and the gear is a third gear 236 which serves to transmit the carri'- ing of the gear to the gear 224 in the next higher decimal place.

The carrying chain just described will be recognized as the well-known locked Geneva gear chain. Since numbers are inserted in the totalizer at any decimal place, it becomes necessary to provide some way of unlocking the chain at the actuated point. rllhis is accomplished by the expedient of mounting the and 236, not on a rigid shaft, but upon the swinging arm 234, which is rotatably mounted on the shaft 216, and held in its position by a spring 231 extending between the arm 234 and the shaft 222, rigid in the frame work.

ln the bottom of the arm 234 is a slot 23S, Fig. 14, on the front part of which is a projection 239, which 4is adapted to be engaged by the surface 240 of the vertical arm 123 of the master dog 123. The angle of throw Iof the master dog 123 is so lproportioned that when said dog is actuated upon the preliminary motion of the keys, the surface 240 comes into approximately a vertical position. The swinging arm 234 is therefore lifted and the gears 232, 235 and 236 are lifted bodily out of engagement with the carrying wheel which is in engagement with the master wheel and the carrying wheel of next lower order. This unlocks the Geneva chain at the actuated point and there then exists in the totalizer a locked counting chain extending from the master wheel to the highest wheel of the totalizer,

Mounted between the totalizer side plates is a bar 241 which enters slots 242 in the star wheel 235 when the latter is lifted by the swinging arm 234. This bar 241 serves to hold the star wheel 235 and its associated gears in a correct position during the disengagement of these gears with their associated carrying wheels 224.

I shall hereinafter term the assemblage of gears 232, 235 and 236 a transfer gear, since the function of this gear is to transfer the tensfrom one denomination to another.

Owing to limitations of space, the carrying wheels 224 being but 1/10 of an inch apart, it is necessary to stagger the transfer gears. There is one set of transfer gears which is mounted on the swinging arms like 234. The alternate transfer gears are simii larly mounted on swinging arms like 243, which are rotatably mounted on the shaft 217, and are held in their correct position by springs 244 extending between said arms and the shaft 218 supported between the totalizer side plates 202 and 203. It is to loe understood of course that there is a plurality of arms 234 and 243 and that have given common numbers to each of the arms in the plurality. Both sets of arms terminate in cam surfaces 245 which serve to actuate a safety bar 246, which is pivotally mounted in the frame work on the shaft 223. This safety bar 246 extends the entire width of the totalizer and is adapted to be turned when any of the arms 234 or 243 are actuated by the master dog. A. portion 247 extends in the path of all the cams 245 and the locking portion 243 is adapted to be brought into the path of the locking surfaces 249, which is present on all of the swinging arms 234 and 243. The function of the safety bar is to securely lock all of

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