US1294157A - Calculating-machine. - Google Patents

Description

A. F. POOLE.

CALCULATING MACHINE.

APPLICATION FILED mu.2,1914.

1,294,157. Patented Feb.11,1919.

4 SHEETSSHEEI A. F. POOLEL,

CALCULATING MACHINE.

APPLICATIDN FILED 1AN.2. I914.

1 ,294, 1 57 Patented. Feb. 11, 1919.

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cncummo MACHINE.

Patented Feb. 11,1919.

4 SHEETS-SHEEI Q.

UNITED STATES PATENT OFFICE.

ARTHUR F. POOLE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE WAHL COMPANY, OF WILMINGTON, DELAWARE, A CORPORATION. OF DELAWARE.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Feb. 11, 1919.

Application filed January 2, 1914. Serial N 0. 809,932.

To all whom it may concern: 4

Be it known that I, ARTHUR F. POOLE, a citizen of the United States, residing at Chlcago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Calculating-Machines, of which the following is a specification.

My invention is an improvement in calculatin machines, particularly in the type of calcu ating machines used with a typewriter, one example of which is the machme described'in Patent 893,719, issued-t0 J. C. VVahl, July 21st, 1908.

My machine has articularly for its object the provision 0? an improved form of actuator and totalizer, for handling tables other than the decimal system and the particular application of my invention disclosed in this application is for the handling of the table below, commonly known as the long ton table: 7

28 pounds :1 quarter.

4 quarters l cwt. 20 cwt. :l'long ton.

Totalizers adapted to compute in the above table are made to be operated by the Wahl machine above referred to, but some difficulty is encountered in writing the numbcrs occurring in the lowest denomination, viz., the numbers of pounds. The actuator which is used for these totalizers and others (those for English money, for instance) has a special key which prints one, but adds ten into the totalizer. Such a construction 1s shown and described in the patent to Gold berg, Number 893,720, in which the key in Figure 3 has the above recited function. This construction answers fairly well for handling numbers in which the figure in the tens order does not exceed one. However, in handling a number such as 27 pounds, for instance, which occurs in computations with the long ton totalizers of the prior art, the

matter may be handled in the following position and actuated. This inserts 10 into the totalizer and prints 2 on the work sheet. the typewriter escaping to the next decimal place after the operatlon. The carriage is then returned either by means of'the back space key, or by hand to its original position, and the special key is again operated.

- This operation will superimpose a second 2 over the one'previously printed, and again insert 10 into the totalizer so that as the result of this series of operations, one has printed a 2 on the work sheet in the tens order and inserted 20 into the lowest denomination of the totalizer. The totalizer has then escaped to the units order ofthe pounds denomination, and the 7 key is manipulated, printing 7 and inserting 7 "into the totalizer. It is obvious that these extra operations are not only complicated, but are extremely liable to error, and it is one of the objects of my present invention to so interlock the totalizer with the typewriter keys that upon initiating the operation necessary to insert 20 into the so interlock the typewriter keys normally printing one and two and inserting one and two into the totalizer respectively that they cannot beused when the totalizer is in a position to receive a number in the tensplace of the pounds denomination.

A. further object of my invention is to provide a structure'certain in operation and easy of manufacture. a

The special embodiment of my invention herein described, is a calculating machine having a totalizer adapted to calculate in the long ton table, having a special key adapted to operate only in a particular decimal place, and having this key so arranged that if one starts to print 20, he must finish this operation before proceedingto the next one,-and also to so interlockthe normal adding machine keys that" they cannot be used in this decimal place.

and part of the actuator, .with the covers I removed, showing particularly the actuator mechanism connected with the special key and a shutter arrangement for a number wheel calculating to 28.

Fig. 6 is a front view of the totalizer with part of the cover removed.

Fig. 7 is a top View of the totalizer, partly in section.

Figs. 8 and 9 are sections of gear wheels taken along the section lines 8+8 and 9-9 of Fig. 6.

Fig. 10 is a development, of the number wheels.

Fig. 11 is a section of the totalizer gears along the'line 1111 of Fig. 6.

' As above stated my invention is particularly designed to be used in connection with the calculating machine described in the cited patent to Wahl. Reference thereto will show a totalizer mounted on a typewriter, a set of numeral keys, any one of which serves to operate a master wheel numbered 49 therein, a master dog 208, and the escapement of the typewriter. Also that the depressing of any numeral key results in the masterwheel 49 and the dog 208 and the typewriter escapement operating in the following'sequence:

(a) Dog 208 moves in a counter clockwlse direction (Fig. 5 of this application),

thus unlocking the chain of totalizer gears at the adtuated gear.

(b) The master wheel rotates an amount depending upon the key depressed.

(c) The master dog returns to its original posltion. 1

(d) The carriage escapes, bringing the totalizer gear of next lower order into engagemenlt with the master wheel.-

A reversing handle is also provided in the Wahl machine whereby direction of motion of the master wheel consequent upon the actuation of any key will be determined, and thus a. number which is in the totalizer may be printed out by putting the reversing handle in its subtracting position and copy-.

ing out the exhibited total, which will thereupon be subtracted, and the toltalizer will be cleared. Since the mechanism and operation of the Wahl machineis very fully described in the patent above referred to,

and the machine shown in this present application is a Wahl machine plus additional features, I shall not now enter into a fur- .ther description of the operation of the or dinary Wahl machine, but shall premise that the actuation of the typewriter numeral key results in the master key, master dog and carriage'movmg in the above recited sequence.

The master wheel numbered 49 and the master dog numbered 208 in this "present application correspond in position and func- First. The special actuator mechanism.

This consists of an additional gooseneck l0, rotaltably mounted on a shaft 11, and c0- operating with a special arm on the sector shaft 12. The function of this special gooseneck is similarjto the gooseneck numbered. 96 in Fig. 4 of the cited patent to Wahl, except that this special gooseneck is so proportioned that the sector 13, and

master wheel 49 actuated thereby are rotated ten spaces by the operation of the gooseneck. The gooseneck is operated by a fan 14, rotatably mounted upon the shaft 11, having an opening 15 adapted to engage a pin 16 rigidly mounted in the gooseneck 10. A pull rod 17 forms the connection between the fan 14:, and the special typewriter key to be hereafter-referred to. With the exception above noted, the calculating machine actuator is substantially similar to that disclosed in the cited patent to Wahl.

Second. T he totalizer.

The totalizer in theory is like that shown in the cited patent to Wahl, but differs from it in some of the details. It will be'remembered that the Wahl totalizer consists of a series of carryinggears 18' (Fig. 5.) provided with suitable carryingteeth, and a set of transfer gears, 19, which are mounted on swinging arms 20 which cooperate serc'afz'm with the master dog 20& The totalizer as a whole is mounted on a truck 21 moving with the typewriter carriage. Numbers are inserted in this totalizer, digit by digit by the master wheel, the typewriter carriage escaping after the operation of each numeral key.

The Wahl totalizer as ordinarily constructed is adapted to calculate with numbers arranged in the decimal system. Consequently. since the carrying gears 18 have 30 teeth, they are provided with three carrying teelth placed ten teeth apart thus carrying at every tenth step. 'In order to calculate in the table at the beginning of this specification, some modifications of the decimal structure are necessary. Referring to Figs. 6 and 8, it will be seen that the three highest orders (tons) are arranged in the decimal system. Consequently the carrying gears 18 for these orders will each be provided with 30 teeth and three carrying teeth.

' 'A set of idle gears 39 loosely mounted on a shaft 38 serve to connect the gears 18 with the number disks of the totalizer.

Coming now to the next order, (cwt.) it is necessary to calculate to the base 20. This is handled by having the carrying gear 18 in the units place ofithis denomination have a carrying tooth every tenth tooth and have the number disk associated with said gear contain the customary ten digits, as shown at 100, Fig. 8. The number disk for the tens order of this denomination has its figures arranged as shown by the development of this disk at 101, Fig. 8. The carrying gear associated with the number disk 101 has 30 teeth and has 15 carrying teeth as shown in Fig. 10. The combination of the two disks 100 and 101 will then show all numbers from 0 up to and including 19 and at the 20th step carry 1 into the next higher denomination.

Coming now to the next denomination that of quarters, the number disk whose development is shown at 102, Fig. 8, has its numbers arranged in the order shown. The carrying gear associated with this disk, as shown in Fig. 9, has 32 teeth, andv 8 carrying .teeth, thus carrying at every 4th tooth.

In the next denomination, that of pounds, we wish to carry every 28th step. Conse quently the carrying gear 25 for this section will have 28 teeth. The number disk for this section shown at 103, Fig.8, must have 28 spaces. Since, however, considerations of room prevent arranging these 28 spaces on the disk 103 in a continuous tine, they are arranged in two lines running from 0 to 13 and from 14 to 27 both inclusive. This numbor disk 103 has 14 teeth; consequently it makes two revolutions for each revolution of its associated carrying gear 25. Owin to the disk 103 having two sets of figures, it is necessary to conceal one or the other set in order that the operator shall know for instance whether she shall read 5 pounds or 19 pounds, 9 OHDLlS or 23 pounds, and so forth. It is necessary to alternately expose the two rows of figures on the disk 103 when the disk makes a complete revolution since reference to the development of this disk as shown in Fig. 8 discloses that the numbers in one row progress from 0 to 13, and in the other row, from 14 to 27. Assume, for instance, that the thimble were so placed as to expose the 12 in the first row, and that 4 were then added into this denomination. The disk 103 is revolved 4 spaces, bringing the 2 opposite the reading line. However, at the time the disk 103 passed the point 13, the

thimble 105 will shift, thereby exposing the right. hand row of figures. The carrying of the thimble would conceal the 2, and expose the 16. which is the proper amount. This is accomplished by a thimble 105, Figs. 6 and 8. which surrounds the disk .103, and has openings 106 and 107 in its surface. These openings are staggered as shown in Fig. 8, and means are provided to advance the thimble 105 one step for each revolution of the number disk 103. This results in exposing first the row headed 0 and next the row headed 11. Means for giving the above recited motion tothe thimble 105 will now be described It has been mentioned that the carrying gear 25 has 28 teetln It is provided with two carrying teeth so that it will carry every 14th step. The gear 26 to the left of the gear 25 which gear corresponds in osition to the blank space in the totalizer Between the pound and quarter denominations is a gear of 30 teeth, provided with 15 carrying the number wheel 103 that the thimble 105 would beunuecessary. However, since there is not room to arrange the 28 figures in a single row, but they must be divided into two rows as is shown, it is necessary that the thimble 105 be shifted from one row to the other, every 14th step., This necessitates the placing of the two carrying points on the gear 25 so that this gear will carry the thimble every fourteenth step. On account of wishing to use the same carrying operation which operates the thimble to carry one unit into the higher denomination every twentyeighth step of the wheel 25, the additional gear 26 is provided, which gear as before noted, has 15 carrying teeth, and carries every second step. Therefore, the combination of the two gears willfirst shift the thimble 105 every fourteenth step, and second, carry one unit into-the next higher denomination every twenty-eighth step.' At the time the thimble 105 is moved, the disk 103 moves also. This will be apparent from inspection of the development of the disk 103 as shown in Fig. 8. It will be noted that in said figure the number 14 heading the righthand row is one step in advance of the number 13. Since the shift of the shutter occurs in progressingfrom 13 to 14 and from 27 to 0, it follows that the disk 103 moves a step at the same time'the shutter is shifted.

. thimble. Consequently every time the 27, both inclusive.

mounted between the side plates of the "totalizer; Rigid to this shaft 28 is a gear 29 of the same size as the gear 28, which gear29 meshes into a'gear 30, having the samenumber of teeth as there are openings in the thimble 105, and rigid with said gear 26 is carried by the gear 25, the thimble 105 will be moved one step thereby shifting the visible row of figures on the number disk 103.- This carry, it will beremembered, occurs every 14th step of the carrying gear 25. Therefore the thimble 105 containing openings 106 and 107 will be moved in the proper manner. Numbers on the disk 103 will progress from 0 to and including 13, as viewed through one opening, and then rotation of the thimble 105 will shift the visible row to that containing the numbers 14 to Another step of the thimble' 105 will render visible the row headed 0 which will complete the cycle.

It is desirable to make the number of openings in the thimble 105 smaller in number than fourteen, thereby giving the thimble I a greater angular throw'at each step than the distance between consecutlve numbers I on the disk 103. The lost motion between thimble 105 and its actuating gear 26 is thereby rendered of no importance-in making visible the proper row of figures On the disk 103.

It is to be noted that numbers as high as 27 may be written in the pounds denomination.- Consequently this denomination has two decimal laces, the tens place and the units place. umbers of two decimal places such as 10 to 27 both inclusive are inserted into the pounds denomination in the following manner:

To the right of the gear 25 is a similar gear 31 containing 28 teeth and no carrying teeth, and connected to the gear 25 by a gear 32 mounted on a swinging arm 20 in the last but one decimal place of the totalizer. This gear 32 acts simply as an idle gear. When the swinging arm 20 is in the position shown in Fig. 5, the two gears 25 and 31 turn as one on account of their connection by the gear 32. This structure of two gears of the same size and an idle gear connecting them is necessary totake care of a feature which is peculiar to the Wahl machine. At the right of the master wheel is an aliner stop (not shown) rigid in the frame work. When operating on the gear'25, the gear 31 would be locked by this stop, consequently it would not answer to have the gears 25 and 31 at-all times rigid with each other. An idle gear 32 mounted on the swinging arm 20 is therefore provided to permit the disengagement of the gear 25 from the gear 31 whenever the gear 25 is operated. A locking stop 38 rigidly mounted in the frame work is adapted to cotiperate with the teeth of the idle gear 32 and lock the same when said gear is thrown out of mesh by the swinging arm v20. The swinging arm 33, shown in the last decimal place of the totalizer, does not have a gear mounted thereon, but is provided with a units lock to lock the lowest wheel 31 of the totalizer, as shown in Fig. 5. This lock is made ineffective when operating in the lowest decimal place by the master dog 208 lifting the arm 33 prior to rotation of the gear 31 by the master wheel 49.

Numbers are inserted in this denomination of the totalizer by the master wheel 49 as pointed out in the beginning of this specification, that is, to insert a number such as 25, for instance, the master wheel is turned 20 spaces while in engagement with the gear 25, then the carriage escapes, and the master wheel is turned 6 steps while in engagement with the gear 31. This will. insert the sum of 20 and 6, or 26, into the pounds denomination of the totalizer.

There is another feature peculiar to this totalizer, that of the action of the cam 35 on the roller 36 to take care of a function connected with the special key inserting 10 in the totalizer, but I will defer explanation of this feature until the key mechanism has been described.

17w special key mechanism.

The mechanism operated by the special key which I have numbered 104, is connected so as to operate the special gooseneck re- First. When this key 104 is operated with 105 the typewriter shift key in its normal position, it will rotate the master wheel 10 steps,

and print 1 upon the worksheet.

Second. When the special key 104 is operated with the shift key depressed, a 2 will be printed on the worksheet, and the special mechanism will be thrown into operation and will serve tr lock both the escapement and the shift key until. the-special key 104 has been operated a second time. On such second operation the carriage will then escape and the shift key return to its normal position. Y

- Third. An interlock is provided for this special key 104 to prevent its being operated except when the totalizer is in a position to receive a number in the tens decimal place of the pounds denomination. At that time all of the other numeral keys connected to'the actuator are locked. The object of these interlocks will be gone into hereafter.

I shall now describe the mechanism by which these various functions of the key 104 are made possible.

The first function has been described in seen (particularly in Fig. 3) that the special key v104 is connected by a link 108 to an arm 109 rigid with a shaft 110, rotatably mounted in the frame work. Rigidly mounted on i the shaft 110 is a disk 111, on which, pivoted at 37, is a pawl 112, having a point 113, adaptedto engage a notch 114 in a plate rigid with an arm 115, loosely mounted on the shaft 110. A spring 116 tends to rotate the pawl 112 to engage the notch 114, but is prevented by the contact of'the pawl 112 with an arm 117 rigid to and turn- 1ng with the shaft 118 to which is connected 4' the typewriter shift key 119. Consequently as long as the arm 117 is in the position shown in F ig. 4, corresponding to the normal position of the shift key, operation of the special key 104 will simply rotate the pawl 112 in a counter clockwise direction without its engaging the arm 115 and rotating the said arm also. The shift key 119 is connected by a rod 120, Figs. 1 and 4, to the typewriter platen, which it elevates in the usual manner. Since this connection of the shift key to the platen is well known in the art being illustrated in the form commonly used on the Remington typewriter, I

' will not further describe it. The only part of the shift mechanism with which we are concerned in this present application is the action of the arm 117 and means for locking the rod 120 in its elevated position.

' The arm 115 is held by a spring 121 against the banking post 122 mounted in the frame work of the machine. A push rod 123 is pivoted to the arm 115 at 124. Piv oted in the frame work at 125 and 126 are two bell cranks 127 and 128, having tension,

springs 129 and 130 holding them in contact with a pin 131 rigidly mounted in the frame work. The push rod 123 has mounted in it a pin 132 adapted to contact with the bell cranks 127 and 128 as shown in Fig. 4, and a second pin 133 which operates the locking cam 135. This arrangement .of the bell cranks 127 and 128 coiiperating with the pin 132 serves to hold the push rod in the normal position shown in Fig. 4, but permit dis clockwise direction moving the push rod 123 to the right, (Fig. 4), until the pin 133 engages the locking earn 135.

The locking cam 135 is pivoted on the frame work at 136. .It has a locking point 137, adapted to lock the typewriter escapement in a manner which will be hereafter described, a locking point 138 for the purpose oflocking the shift key 119, cam shaped surfaces 139 and 140 adapted to co5perate with the pin 133, and a pair of notches 141 and 141 adapted to cooperate with the snap pawl 142 rotatably mounted in the frame work.

The rod 120 which elevates the typewriter platen whenever the shift key 119 is used, has extended from it a plate 143, which is adapted to be locked in its elevated position by the surface 138, Fig. 4. The typewriter escapment (Fig. 1) is operated in the usual manner by a universal rod 144, extending under all the typewriter keys and arranged when depressed to rotate a shaft 145 mounted in the frame work by a link 146, attached to an arm 147, rigidwith the shaft 145. From an arm 14.8 rigid with the shaft 145, the usual pull rod 149 operates the typewriter escapement in the well known manner. The arm 147 is shown on an enlargedscale in Fig. 4,'and it will be seen that this arm is adapted to be locked in its depressed osition by the locking surface 137 of the ocking cam 135. Two banking posts 150 thereby permitting the point of the said pawl to engage the notch 114. The locking plate 143 will also be elevated to the position where it may be locked by the locking surface 138 of the locking cam 135. The special numeral key 104 is now operated. Since the point 113 of the pawl 112 is now in engagement with the notch 114, the arm will be rotated in a counter clockwise direction upon the depression of the special key 104 thereby moving the pin 133 to the right (Fig. 4). This pin will ride on the cam surface 139 until it reaches the notch at the end of said surface, and further motion of the pin 133 will rotate the entire cam 135 in a clockwise direction.

The depression of the special key 104 during this time has been rotating the arm 147, connected with the typewriter escapement. Consequently when the pin 133 has reached the limit of its right hand movement (corresponding to the complete deprcssion of the special key 104) the cam 135 Will-have been rotated to a positionwhere the locking surface 138 will lock the plate 143 in its elevated position, the locking surface 137 will lock the arm'147 in its depressed position, and the snap pawl 142 will have engaged the notch 141.

It will be observed thatthe fact of the bell crank 127 being held against the pin 131 by a spring 129 will permit this motion of the pm 133. The special key 104 is now returned to its normal position thus permitting the spring 121 to return the pin 133 to its normal position. The parts will then be in the position shown in Fig. 4, except that the cam 135 will have been rotated so that its point stands in the position show in dotted lines. Y

In order to avoid confusion, the point the cam 135 only is shown in the dotted position. The dotted position of the other parts such as the surfaces 137 and 138 may be readily seen from the position of the 147, and 10 has been inserted in the pounds v denomination of the totalizer. The locking of the escapement of course prevents the escapement of the typewriter carriage, and a second stroke of the key 104 is necessary to escape it.

On the second stroke of the key 104, the pin 133 in its travel to the right encounters the cam surface 140 on account of the cam 135 'being in its displaced position, and when said pin has reached the end of its travel, it has rotated the cam 135 back to its original position as shown in Fig. 4, The shift key now returns to its normal position, the arm 147 connected-to the typewriter escapement is unlocked, and the carriage escapes. On this second stroke of the key 104, 10 is again inserted into the pounds denomination of the totalizer, making a total of 20 which has been inserted as a result of the two successive strokes.

It will be remembered that this double stroke of the special key 104 is supposed to phave occurred in the tens decimal place of the pounds denomination. Vhen the carriage has escaped to the units place, a num ber corresponding to the units may be put in by any of the numeral keys.

It has been noted before that the type bar connected to this special key 104 is arranged to print 1 when the shift key 119 is in its normal positionfiand print 2 when the shift key 119 is in its depressed position. From the preceding, it is evident that whenever ratchet wheel.

the operation of the special key 104 prints a 2 on the work sheet, a second stroke of this key is necessary to get the carriage to escape, and sincethe shift key is locked in 1ts depressed position during this second stroke, a second 2 will be printed in the tracks of the first one and appear as a single impreslar part of my invention since the main ohject' of this cam 135 is to lock the shift key and the typewriter escapement pending a second stroke of the special key 104. One

equivalent which obviously suggests itself is to have a number of ratchet teeth on the part containing the notch 114, thereby making a ratchet wheel of it, and having two locking pawls adapted to lock the arm 147 and the plate 143, and have these arms controlled by a two cycle cam rigid with the One would then have a mechanism having an operating cycle of two steps and the result would be the equiv alent of the form shown.

The interlock between the special and the ordinary numeral keys.

The object of this interlock is to permit operation of the special key 104 in only one particular decimal place of the totalizer, and to prevent operation of any of the other numeral keys in said decimal place. Without the provision of such an interlock it is ob-' vious that mistakes could easily be made. For instance, if it were desired to insert 10 into the totali'zer, the operator might inadvertently operate the 1 key instead of thespecial key 104. The 1 key will print 1 on the work sheet just as the key 104 will, but it will insert only 1 into the totalizer instead of 10. Also the 2 key may be confused with the specialkey 104, and this key in turn may be confused with the keys printing either 1 or 2. Therefore an interlock to prevent faulty operation is highly desirable.

One form of the interlock which I have found desirable for this purpose is illustrated in- Figs. 1 and 2. All of the pull rods 17 have in them two notches 50 and 51 as shown most plainly in Fig. 1. As a matter of theory, the notch 50 is needed only'in the pull rod connected to the special key 104,

and the notch 51 is not needed in this pull sion on the work sheet. The double stroke terference.

' pawl 54, also pivoted in the frame work and adapted to engage the notch 50 in the pull rod of the special key 104, the arrangemen-t being such that the pawl 54 is inoperative when the pawl 52 is in action and vice versa.

The totalizer is provided with a cam 85 adapted to contact with and depress the roller 36 mounted on a bell crank 57 pivoted at 58. A spring59 tends to hold this roller in a normal position determined by the banking post 60. A link filconnects the bell crank 57 to the bell crank 62, pivoted at 63 in the frame Work. The bell crank 62 is connected by a link 64 to the pawl 52. With the pawls in the position as shown in Figs. 1 and 2, all of the pull rods except the one connected to the special key 104 are locked by the pawl 52. When the totalizer escapes to the next decimal place, the universal pawl 52 will be freed from engagement with the notch 51 and the pawl 54. will engage the notch 50 in the pull rod connected to the special key 104. 7 From the preceding it follows that when the roller 56 is depressed by reason of the totalizer being in a position to have numbers inserted in the tens decimal place of the pounds denomination, all the numeral keys exceptthe special key 104 are locked, and when the totalizer is in any other position, the special key is locked, and all the other keys are free. Therefore the inadvertent operation of the wrong numeral keys is prevented.

The arrangement of the cam 35 mounted on the totalizer itself is very convenient; the totalizer may be freely adjusted along the truck and since the cam of course moves, with it, the interlock is automatically effective without further independent adjustment.

lVhile I have shown this interlock as ap plied to a totalizer and actuator adapted to calculate in the long ton table, the same. arrangement may be used to advantage on the ordinary English money actuator, such, for instance, asthat shown in the cited patent to Goldberg. This English money actuator has a special key, which when operated inserts 10 in the totalizer and prints 1 in th tens decimal place of eitherthe shillings or pence denominations. It is obvious that this special key is the only key whlch should be used in either of these two decimal places since the only number that is inserted in such places is 10. The numeral key which prints 1 and inserts 1 into the totalizer may be mistakenly used in this place, and an error which would be exceedingly hard to find would result. The appearance of the work sheet would be the same, whether the special key inserting 10 or the ordinary key inserting but 1 were used, but the totalizer would exhibit a total which was too small by 9 units in the denomination in which the error occurred. It is apparent to those skilled in the art that the interlock herein described would be of great advantage in such a case.

It may sometimes happen that owing to structural reasons, it is not convenient to put a special 10 key in an actuator for calculating English money. In this case, it should be noted that the double stroke mechanism for the special key may be used on the ordinary numeral key which prints 5 and inserts 5 in the totalizer. This 5 key would print 5 in its normal position and print 1 in its shift position. When this key is operated to insert.5, the key would be used in the normal position in which case the key would insert 5 in the totalizer and print 5 on the work sheet. In case it were desired to use this key for inserting 10 into the totalizer, the shift keywould be thrown to its upper case position thus determining that operation of the key should print a 1 instead of a 5, and that key would have to be operated twice before the carriage wouldescape. The net result of operating the key twice would be analogous to the special key 104 in this present application. 1 would be printed on the work sheet twice, but inasmuch 'as these figures were printed in the same place, they would appear as a single impression, and twice 5, or 10, would be-inserted in the totalizer.

In case of the use of the 5 key as outlined above, the interlock would have to be slightly modified. All of the numeral keys would be unlocked except when the totalizer was in the tens decimal place of the shillings and pence denominations. In these two decimal places, all of the keys would be locked. The action of throwing the shift key into its upper case position would unlock the 5 key only. It is thought that in view of the structure disclosed in this specification, such an arrangement as outlined made, for, asa matter of fact, the operator is not compelled to use the machine at all. He may. perform the computations mentally. However, the word is used in the'sense of making it necessary that the operator per- .form a'second operation before proceeding with further computations, on the machine. Instead of reciting this long sentence in each of the claims, I have used the single word therein and wish it to be taken in the sense considerable mechanical advantage.

as described above. I

I believe I am the first to provide an actuator in which under certain circumstances a second stroke of one of the numeral keys is compelled, and I wish to claim the same broadly. The arrangement of the shutter to display one or the other of-two sets ofnumbers in the totalizer, and having this shutter arranged so that it moves always in the same rotation is new,

I consider that I am the first to provlde an interlock between the special keys and the ordinary keys of the actuator, and I wish to claim the same broadly.v

To my knowledge, I am the first to provide a special key for inserting a number into a totalizer and having printing mechanism operatively connected to this key such that'when the key is operated once one number is printed on the work sheet, and when it is operated twice, a different number is printed on the work sheet, and I wish to claim the same vbroadly.

Many modifications and variations may be made from the precise structure herein shown and described without departing from the spirit of my invention since I claim:

1. In a totalizer the combination of a number disk adapted to exhibit either of two sets of figures, a rotary shutter having a series of openings therein to determine which set of figures shall be exhibited, and means to rotate said shutter a plurality of spaces in a given direction.

2. In a totalizer, the combination of a number disk adapted to exhibit either of two sets of figures, a rotary shutter having a series of staggered openings therein to determine which set of figures shall be exhibited and means to rotate said shutter a plurality of steps in a given direction.

3. In a totalizer, the combination ofz a number disk adapted to exhibit either of two sets of numbers; a shutter adapted to be continuously rotated in one direction and having a series of openings therein to determine which set of numbers shall'be ex hibited; and means operatively connected to said number disk to controlthe rotation of said shutter.

' 4. In a totalizer, the combination of: a number'disk adapted to exhibit either of two sets of figures; a rotary shutter having a series of openings therein to determine which set of figures shall be exhibited; and means operated/by 'said number disk to intermittently rotate said shutter step by step in a single direction.

5.' In a totalizer the combination of: a number disk adapted to exhibit either of two sets of figures; a rotary shutter having a series of openings therein to determine which set of figures shall be exhibited,'and carrying mechanism operated by said, number disk to intermittently rotate said shutter step by step in a single direction.

6. In a totalizer the combination of; a number disk adapted to exhibit either of two sets of figures; a rotary shutter having a series of openings therein to determine which set of figures shall be exhibited, and reversible carrying mechanism operated by said number disk to intermittently rotate said shutter step by step in a single direce a series of openings therein to determine which set of figures shall be exhibited by said number disk, a reversible carrying mechanism including a Geneva gear and means controlled by said number disk intermittently to rotate said shutter step by step in either direction.

8. In a totalizer the combination of: a carrying gear, for calculating to a certain base; a second carrying gear; carrying mechanism adapted to carry said second gear a plurality of times during a single cycle of said first gear; and a shutter operated by said secondgear i.

9. In a totalizer the combination of: a carrying gear for calculating to a certain base; a second carrying gear; carrying mechanism connecting said gears adapted to carry said second gear a plurality of times during a single cycle of said first gear; and a rotary shutter operated by said second gear,

10. In a totalizer the combination of: a carrying gear for calculating to, a certain base; carrying mechanism connecting said gears adapted to carry saidsecond gear a plurality of times during a single cycle of said first gear; and a rotary shutter with staggeredopenings operated by said second car.

11. In a totalizer the combination of: a carrying gear for calculating to the base 28; a second carrying ear; carrying mechanism connecting said gears adapted to ace-ac? carry said second said first gear;an said second gear.

12. In a totalizer, the combination of: a carrying gear for calculating to a certain base; a rotary shutter; and carrying mechanism adapted 'to advance said shutter a plurality of times during a single cycle of said first gear.

13. In a totaliz er the c mbination of: a number disk having two rows of figures; a rotary shutter having staggered openings therein associated with said number disk to determine which row of ii res shall be read; a carrying gear operatively connected thereto; and carrying mechanism connectin'g said carrying gear to said shutter and adapted to advance said shutter a plural ty of times during one cycle of said carrying gear every 14th step of a shutter operated by 14. In a totalizer the combination of: a number disk having figures arranged in two sets; and a shutter having a set of openings cooperating therewith, said openings subtending a greater angle than that subtended by consecutive numbers of-the same set on said disk.

15. In a totalizer the combination of: a number disk having two rows of figures; a shutter mounted concentric with said number disk, and having a less number of openings than there are'figures in either of said rows and means to move said shutter a plurality of steps in a given direction.

16. In a totalizer the combination of: a carrying gear for calculating to a certain base; a second carrying gear; carrying'mechanism connecting said gears adapted to carry said second gear a plurality of times during a single cycle of said first gear, a number disk connected to said first gear, and a rotary shutter operated by said second gear, said shutter having a number of openings spacedat a greater angular distance apart than the figures on the circumference of said number disk.

17. In a calculating machine the combina tion of an actuating mechanism, a set of nu-.

meral keys operative on said actuating mechanism, a traveling member adapted to travel from one predetermined point to another predetermined point and means operated by saidtraveling member to look some but not all of said numeral keys at a third'point in the travel .of said traveling member, said third point being intermediate between the other two points whereby the travel of said travelin member will first look some of said keys an then by further travelin the same direction unlock said keys.

18. In a calculating machine the combination of an actuating mechanism, a set of numeral keys operative on said actuating mechanism, a traveling member adapted to travel from one predetermined point to a secondwhereby during the travel of said traveling member said keys are first unlocked, then locked, then unlocked, said cycle of unlocked, 7 locked and unlocked being possible without a reversal of motion of said traveling member. .19. In a calculating machine the combina-v tion of: a traveling carriage, a numeral key, an escapement mechanism for said carriage actuated by said key, and means'controlled by said key to lock said escapement mechanism, said locking means remaining operative upon the return. of said key to its nor-' mal position.

20. In a calculating machine the combination of .a traveling carriage; a numeral key; an escapement mechanism for said carriage actuated by said key; a second key; and

means controlled by said numeral key to lock said escapement mechanism coincident with the actuation of said key, said locking means remaining operative upon the return of said key to its normal position. 21. In a calculating machine the combination of: a traveling carriage; a numeral key; an escapement for said carriage controlled by said key, a type bar associated with said key; a platen having a normal and a shift position adapted to receive impressions from figures, said numeral key must make one stroke to escape said carriage and when said second figure is printed, said numeral key must make a plurality of strokes to escape said carriage.

23. In a calculating machine,-the combina-' tion of a traveling carriage, a numeral key:

and escapement for said carriage controlled by said key, a type bar associated-with said key and platen, means to shift the relative position of said type bar and platen whereby said type bar makes one impression on said platen when the parts are in-their normal position and a difierent impression when the' parts are in'their shifted osition, and means controlled by said shifting means .to lock in its displaced position.

24. In a calculatmg machine the combination of: ,a numeral key; a platen havingasaid escapement when said shifting means is normal and shift position; and means ,aetu

ated by said numeral key to lock said platen in a shift position during the stroke of said tion of: a numeral key; printing mechanism connected to said key; a platen having a normal and a shift position, thereby deter- .mining the figure printed by said printing mechanism; a'lock for said platen actuated by said numeral key, said lock being effective when said platen is in its shift position, and being released by a subsequent stroke of said numeral key.

27-. In a calculating machine the combination of: a numeral key; mechanism compelling a plurality of strokes of said key under certain circumstances; and printing mechanism controlled by said key, said printing mechanism printing one character when said key makes asingle stroke and printing a different character when said key is compelled to make a plurality of strokes.

28. In a calculating machine the combination of; a numeral key; and mechanism compelling a second stroke of said key under certain circumstances.

29. In a calculating machlne the comb1-' nation of: an actuator; a set of numeral keys operative on said actuator; a special numeral key also operative on said actuator; a traveling member; and means operated by said traveling member to loclgsa'id special numeral key at a predetermined point .of the travel of said traveling member and unlock said special numeral key as said traveling member continues its motion.

30. In a calculating machinethe combination of: an actuator; a set of numeral keys operative on said actuator; a special numeral key also operative on said actuator;

' a traveling member; and means to lock said special numeralkey at a predetermined point of the travel of said traveling member and unlocksaid special numeral key as said traveling member continues its motion.

31-. In a calculating machine the combination of a traveling carriage, a numeral key an escapement mechanism for said carriage controlled by said key, a type bar associated with said key, a platen adapted to-rreceive impressions from said type bar means controlling the relative position o said platen and type bar whereby the character printed on the platen by said type bar is determined and means controlled by said key to lock said escapement mechanism when said platen and type bar positioning means is' in one relative position and to per- -mit the operation of said escapement mechafor two strokes of said numeral key.

33. In a calculating machine the combination of: a numeral key; a platen; printing mechanism operated by said numeral key and adapted to print on said platen; a shift key determining the relative position of said printing mechanism and said platen; escapement mechanism for saidcarriage; and means connecting said shift key and said escapement mechanism whereby it is determined that when said shift key is in one position said escapement mechanism requires two strokes of said key for operating said escapement mechanism.

34. In a totalizer the combination of: a number disk adapted to exhibit either of two sets of numbers, the lowest'of the numbers in one set being greater than the highest number in the other set; and a rotary shutter associated. therewith to determine which set of numbers shall be exhibited.

35. In a totalizer the combination of: a number disk adapted to exhibit either, of two sets of numbers, said numbers being arranged in consecutive orders, the first number of one set being consecutive with the last number of the other set whereby the two sets form a single series; and a rotary shutter associated with said number disk to determine which set of numbers shall be exhibited.

36. In a calculating machine, the combination of a numeral key having a printing mechanism. operatively connected therewith, and printing determining means such that when said key is operated once one number is printed on the worksheet, and when it is operated twice in the same decimal order a difl'erent number is printed on the worksheet.

37. In a calculating machine the combination of a totalizer,'a numeral key, printing mechanism operatively connected to said key, actuating mechanism for inserting a number into the totalizer also opeiatively connected to said key, and means to determine that when said key is operated once one number is inserted in the totalizcr and printed on 'the platen, and when said key is operated twice a number is printed on the platen which is double the number inserted in the totalizer by a single stroke of the key. 38. In a calculating machine, the combination of a set of numeral keys, a special numeral key, a totalizer adapted to have numbers inserted therein serz'atim by the ac-- tion of said keys, and a cam on saidtotalizer determining that said special key shall be inoperative when said totalizer is in a certain position.

39. In a calculating machine, the combination of a traveling bar, a set of numeral keys controlling the travel of said bar, a totalizer adapted to receive numbers inserted by said keys, a cam rigid with said totali zer, said totalizer and cam being adjustable along said bar, and means to lock one but not all of said numeral keys, said looking means being controlled by said cam.

40. In a totalizer, the combination of number-exhibiting means adapted to exhibit either of two sets of numbers, the lowest number in one set being greater than the highest number in the other set, and a shutter associated with said number-exhibiting means to determine which set of numbers shall be exhibited.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

ARTHUR F. POOLE.

Witnesses:

FRANK BLAKE, EDNA BOTKIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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