US1909571A - Printing mechanism for tabulating machines - Google Patents

Description

May 16, 1933. F. M. CARROLL 1,909,571

I PRINTING MECHANISM FOR TABULATING MACHINES Filed June 22, 1928 8 Sheets-Sheet 1 a vw auto z $5 65 elf team May 16, 1933. F. M. CARROLL 1,909,571

PRINTING MECHANISM FOR TABULATING MACHINES Filed June 22, 1928 8 Sheets-Sheet 2 an Eng 0 avwewtoz May 16, 1933.

F. M. CARROLL Y 1,909,571

PRINTING MECHANISM FOR TABULATING MACHINES Filed June 22, 1928 8 Sheets-Shea; 3

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F. M. CARROLL PRINTING MECHANISM FOR TABULATING MAQHINES Filed June 22 1928 8 SheetsSheet 4 May 16, 1933. F. M. CARROLL PRINTING MECHANISM FOR TABULATING MACHINES Filed June 22, 1928 a Sheets-Sheet FIGS. F'GE.

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F. MIQARROLL PRINTING macxmmsm 'FOR nsumwme nacrmias Filed'Jung 22, 1928 s snets-sheet 6 F. M. CARROLL I 1,909,531

PRINTING MECHANISM FOR TABULATING MACHINES Filed June 22, 1928 May 16, 1933.

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Patented May 16, 1933 UNITED STATES PATENT! OFFICE FRED M. CARROLL, OF YONKERS, NEW YORK, ASSIGNOR TO THE TAIBULATING MACHINE COMPANY, OF ENDICO'IT, NEW YORK, A CORPORATION OF NEW JERSE'Y PRINTING MECHANISM FOR TABULATING MACHINES Application filed June 22,

This invention relates to printing mechanisms, in general, and more particularly to the paper feeding mechanisms for accounting machines whereby the paper may be spaced variable amounts to-meet some particular requirement.

Machines of the type to which the present improvements have been applied are em ployed in varied lines of business, the accounting practices and requirements of which are similarly diversified. At the present time the accounting and printing portions of such machines are almost universal so that a standard type of machine may be altered to meet the various needs. Heretofore the efiiciency of such machines has been reduced inasmuch as no provision has previously been made for varying the paper feed to conform to-the difi'erent requirements. It is then a broad object of the present invention to provide a paper feeding attachment that is substantially universal in its functions and one that may be readily altered to meet the different requirethat thelast item may be suitably separated from the total for purposes of identification and that the total may be suitably spaced from the first item of a-following group of items. 7 a

In connection with spacing items and totals it is a further object to provide, improved means to automatically space the paper if' a total should be taken prior to the completion of the listing operations. K

It is astill further object of the present invention to provide means whereby several pairs of feeding rollers may be driven simultaneously or independently by the listing and total taking mechanism to provide for feeding narrow or wide record sheets and byselective means to provide for printing 1928. Serial No. 287,549.

the items on one sheet and the totals on another.

It is a still further object of thepresent invention to provide means whereby totals may be'successively printed without related items and the paper spaced to accommodate such totals and selectively controlled by the total taking driving means or the usual listing driving means.

Other objects of the invention will be clear from the following detailed description which should be read in connection with the accompanying drawings, in which:

Fig. 1 is a view in side elevation of a conventional form of tabulator with the improved attachment associated therewith;

Fig. 2 is a front view in elevation of the machine shown in Fig. 1;

a F ig. 3 is a cross sectlonal view of the paper feeding device associated withfthe total printing mechanism taken on the line 3-3 of Fig. 2;

Fig. 4 is a cross sectional view of the paper feeding device associated with the item printing mechanism;.

Fig. 5 is a view taken on the line 5-5 of Fig. 4;

Fig. 6 is a vlew taken on the line 6-6 of I Fig. 4;

Fig. 7 is a top plan view taken on the line 77 of Fig. 3; a

Fig. 8 is a diagrammatic representation of the electrical control eircuits;

Fi 9 is a fragmentary sectional view showing in detail the construction of the clutches used for selecting various feeding rollers for operation; I

Fi 10 is a cross sectional view taken .on the l1ne 10-10 of Fig. .9;

Fig. 11 is a view taken on the line 1111 of Fig. 9 and shows the one-way drive between the driven rollers and the driving mechanism;

Figs. 12 to 16 inclusive illustrate some of the diflerentpaper feeding operations that may be performed by the present improve ments. I

Similar reference numbers in all of the above figures are employed to designate corresponding parts thereof.

. herein. As is well known, as the perforated cards are passed through the machine, one or more of the counters are operated to show the figures or the totals of the figures represente by the perforations in the cards.

The printing 'devices whereby numerals corresponding to the perforations in particular card columns or the amount standing on any particular counter wheel are printed, comprise a plurality of groups of type bars F' s. 1 and 2) any one of which may be impe e by suitable hammers (not shown) printing unctions. Inasmuch as the .printing devices and the controlling devices therefor are not involved in the present application, they are not shown in detail herein. For further details of construction reference may be had to the atent to C. D. Lake, No. 1,379,268, dated ay 24, 1921.

The paper strip 19 upon which is printed numerals by means of the type 20 and an inking ribbon 22 (Fig. 1) interposed between the type and the paper strip is drawn from i a storage roller (not shown). The paper strip thence passes around a tension roller 23 carried by a spring-ur ed arm 24, then around fixed rollers 25 an 26 to the platen roller 21. l y

The printing mechanism is shown as equipped with a pair of paper strips 19 (see Fig. 2) and in the present case each strip after it passes around the platen 21 is led between cooperating feeding rollers of'which there are two pairs designated A, B (Fig. 1) and C, D (Fig. 3) the righthand paper strip passing between the pair of rollers A, B while the left hand strip passes between the pair of rollers C, D. As each strip asses awa from the related cooperating ceding ro ers it is fed over a stationary guide plate 27 to permit the printed endof the paper strip to be either rolled upon a storage roller in the usual manner or be deposited in a suitable receptacle. It is obvious, of course, that a wide paper strip may be provided in lieu of two strips in WhlCll case the single paperstrip wil cooperate with both pairs of feeding rollers. As is best shown in Fig. 2, the feeding rollers A and C are in longitudinal alinement and are rotatably mounted upon a shaft 28, i a similar construction provided for ainst a platen 21 to perform the the feeding rollers B and D, this pair of rollers be mounted upon the supporting shaft 29. 'fiie adjacent ends of feeding rollers A and C are mounted upon the shaft 28 by means of roller bearings 30 (Fig. 2), a similar construction also bein provided for rollers B and D. Each fee ing roller is rotatably molmted at its otherend on the supporting shaft by an annular disk 31 (Fig. 9) provided with gear teeth 32. It will be noted that the gear teeth of the parallel pairs of feeding rollers intermesh so that one may be driven by the other. Shaft 29 which supports the longitudinally alined feeding rollers B and D is fixed at its ends in the stationary frame portions of the machine but shaft 28 which carries the longitudinallyalined feeding rollers A and C is carried by a pair of plates 33 and 34 (Figs. 1 and 4) loosely mounted upon a rod 35 the lower portions of each of the plates 33 and 34 having extensions to which are connected springs 36 in order to urge the pairs of feeding rollers A, B and C, D into cooperative relationship. In order to disen age the feeding rollers for the purpose of readin the paper therebetween, a rod 37 (Fig. 4 is provided and has a flattened portion 38 bearing against the extensions of the plates 33 and 34 so that as the rod 37 is rocked b means of a finger piece 39, the feeding rol ers carried by shaft 28 will be disengaged from the cooperating feeding rollers.

A system of clutches is rovided for the various feeding rollers wliereby segments which are operable during different machine operations may drive either pair of feeding rollers. The particular manner in which this is obtained will now -be described in detail. p y

Clutch E (Fig. 9) which controls the establishment of the driving connection between shaft 28 and the pair of feeding rollers C, D may be taken as a representative of the particular mechanical expedient adopted for shifting the driving connections to the various feeding rollers. By means of a splined connection 40 (Figs. 9 and 10) to s aft'28 a flanged collar 41 may be rotatably driven "by shaft 28 as it is shifted longitudinally on a sleeve 42 encircling shaft 28. When a sufficient shifting movement has been given to collar 41 a pin 43 carried thereby will engage one of a plurality of notches 44 formed in the face of disk 31. This shifting movement is placed under control of a lever 45 pivoted at 46 and having a pin 47 engaging an annular groove 48 in the collar 41. This clutch, which is designated generally as clutch E, establishes a clutch connection between shaft 28 and feeding roller C which latter drives feeding rollmechanism similar to that disclosed in Figs,

9 and 10 is provided. The clutch G establishes a connection between shaft 28 and the feeding rollers A, B when a control lever 49 is moved to the left, but when lever 49 is shifted to the right a clutch H is adapted to connect shaft 29 to the pairs of feeding rollers A, B. Thus in general, either shaft 28 or 29 may drive either or both pairs of feeding rollers.

Shaft 29 is adapted to be driven by a gear segment. 50 (Figs. 3 and 9) while shaft 28 is driven by a gear segment 51 (Figs.4 and 9).

movement will be effected between ratchet.

Loosely mounted on shaft 29 is a gear 52 (Figs. 3 and 9) meshing with segment 50, the gear having a hub 53 to which is attached a disk 54 carrying a pawl 55 (Fig. 11) engaging the teeth of a ratchet wheel 56. The hub of the ratchet wheel 56 is reduced to receive an alining wheel 57 (Figs. 3 and 9) and a gear wheel 58, a pin 59 being adapted to secure these three elements for a unitary movement. For the present purposes it may be assumed thatgear wheel 58 is rigidly secured in some manner to a gear wheel 62 pinned to shaft 29 by a pin 63. Shaft 29 has attached at its end a knurled operating knob 64 to permit manual adjustment of shaft 29 so that as the shaft 29 and ratchet wheel 56 are turned in the direction of the arrow shown in Fig. 11, an idle ratcheting wheel 56 and pawl 55 but the clutched rollers will be turned. .As the shaft 29 is turned it is held in alined position by an alining pawl 65 (Fig. 3) engaging the interdental spaces of the alining wheel 57.

The driving connection between shaft 28 and gear'51' differsonly in that the gear segment 51 drives a pinion 66 (Fig. 4) which imparts movement to a gear 69 on shaft 28 through a train of idler gears 67 and 68. It will be recalled that shaft 28 is springurged towards shaft 29 and the'purpose of the gear train just described is to thrust shaft 28 towards shaft 29 to force the feeding rollers into cooperation, thus assisting spring 36. Gear 69 is similar to gear 52 on shaft 29 and has a similar connection to its shaft 28. ,7

It will be obvious that the extent of rotation of the cooperating feeding rollers when driven by segment 51 is directly proportional to the extent of 'movement imparted to the segment and in the present instance, a manual control is provided 'to vary the extent of movement to give the proper line spacing movement when it is necessary to conform to predetermined requirements. Segment 51 (Fig. 4) is attached to a segment-shaped frame 70 by suitable fastening means 71. Segment frame 70 is loosely mounted upon a stud shaft 72 and adjacent to the frame is an arm. 73 carrying a pawl 74 adapted to engage the ratchet teeth 75 formed on the inner concentric edge of rack 51 to thereby drive frame 70 and rack 51. Arm 73 is given an invariable movement during machine operations and in order to vary the movement given to segment rack 51 a shield 76 is interposed between pawl 74 and ratchet teeth 75 to vary the number of effective ratchet teeth. Shield 76 is attached to a plate 77 (Fig. 7) loose on stud shaft 72 and is held in a desired position by a holding pawl 78 (Fig. 4) carried by plate 77 and engaging the interdental spaces of a fixed plate 79. A finger piece 80 movable over a scale 81 (Fig. 6) indicates the degree of line spacing that may be effected by subsequent machine operations) Operating arm 73 has suitable connections to. the drivin parts of the machine described as follows: ower for driving the various mechanisms is, in the present case, obtained by an auxiliary motor the power shaft of which has a belt connection 82 (Fig. 5) to a drive shaft 83. A pinion 84 (Figs. 3 and 5) on shaft 83 drives a gear 85, the latter being connected to a gear 86by a sleeve 87. Gear 86 drives a gear 88 to which is attached ratchet wheels 89 and 90. Thus, through the train of gears, just described, ratchet Wheels 89 and 90 are constantly rotated. Loosely mounted on a shaft 91 which carries gear 88 and ratchet wheels 89 and 90 is a cam-92 (Fig. 4) engaging a roller 93 carried by a bell crank arm 94 having a link connection 95 to an extension of the arm 73. The profile of cam 92 is so shaped as to reciprocate arm 73 during each rotation of said cam. A pawl 96 carried by cam 92 is adapted to engage the interdental spaces of the ratchet wheel 89 to thereby drive cam 92.

The mechanism for effecting the control of one of the linespacing mechanisms is under control of the ratehet wheel 89 and a magnet 97. Pawl 96 is normally held in cam 92 completes a revolution, magnet 97 will be deenergized permitting the lug 99 to again be in the path of the extension 98 disengaging pawl 96 from ratchet wheel 89 thus stopping movement of cam 92. To prevent I a downward extension of a gravity operated pawl 102 substantially at the termination of the rotation of the parts. Pawl 102 is pivoted on the pivot pin of the armature structure and has a; pair of stop abutments 103 which are spaced apart a, greater distance than the diameter of the cooperating rod 104 which permits pin 101 to pass idly by the extension of pawl 102 to assume the reboundpreventing position shown.

Shock to the parts operated is minimized by a spring-retarded plunger 105 (Fig. 4) to which is pivoted a slidably mounted member 106, the latter cooperating with a pin 107 carried by the frame 70. Frame 70 is restored to normal by a spring 108 and as it approaches this positionthe pin 107 engages the member 106 compressing a previously extended coil spring 110.

Current for operating the motor is su p llified by line wires 111 and 112 (Fig. 8

e circuit for magnet 97 extends from the right side of the line 112 through the magnet 97, to contacts 113which are in series with cam controlled contacts 114, thence to the left side of the line 111. Contacts 113 are controlled by a lever 115 which has two positions, the List which completes the circuit connection to magnet 97 from contacts 114 and the Non-list which breaks said circuit connection. Contacts 114 are timed to close after item printing operations.

The above makes it clear that if a strip of aper is inserted between feeding rollers C, (Fig. 2) adjustment of lever to the right will permit shaft 28 to drive said rollers whereby items may be listed on the strip with predetermined spacings (see Fig. 12). However, the adjustment of lever 49 to the left only will permit shaft 28 to drive rollers A, B permitting items of predetermined spacing to be effected on the strip between t ese rollers. If a single 'sheet cooperates with both pairs of rollers adjustment of levers 45 and 49 toward each other will provide for the driving of both pairs of rollerswbg shaft 28.

en printing items in this manner (see Fig. 13) it is frequently desirable to limit the number of items that may be placed on a sheet in order to provide a suitable s acbetween the groups of items printet on a ong work sheet or else insure that the number of items printed will conform to the number that may be accommodated.

A cross bar 116 (Figs. 3 and7) is ada ted to connect the arm 73 and a simi ar arm 117, the latter carrying a pawl 118 (Fig. 3) engaging the rack teeth 119 of the gear segment 50. Gear segment, is carried by a segment frame 120 also pivotally mounted on the stud shaft 72. It will be noted that: the driving mechanism for segment 50 just described 1S substantially a duplicate of that shown in Fig. 4, it being further noted that a shield 121 carried by a plate 122 may be adjusted by a finger piece 123 and held in adjusted position by a pawl 124 to vary the effective number of rack teeth 119. When this part of the apparatus is utilized for the purpose of llllliting the number of item printings the shield is preferably adjusted so that pawl 118 effects a single ratchet tooth movement of segment 50 during each paper feeding operation. The segment 50 1s held in its successively advanced positions by a springurged retaining pawl 125 also cooperating with the ratchet teeth 119. As the gear segment 50 is moved downwardly an adjustable block 126 slidable in a concentric groove in frame 120 and rigidly held by a screw 143 advances towards a finger 127 of a contact control member 128 and opens con tacts 129 when the block 126 actuates the fin er 127. I

ince contacts -129 are preferably in the motor circuit of the tabulating machine the driving motor will thereupon stop and card and paper feedin operations will cease. Block 126 is preliminarily adjusted when segment 50 is at normal so that its position adjacent a scale 109 (Fig. 6) will indicate the number of items that may be printed.

Restoration of the gear segment to its normal starting position may be provided for by manually disengaging pawl 125 (Fi 3) so that a spring 130 may return the advanced parts, the shock being absorbed by a cushioning device 131 similar to the one previously described.

It has been assumed that levers 45 and 49 (Fig. 2) have been moved toward each other so that the feeding rollers are driven by shaft 28 to feed a wide paper strip. However, if levers 45 and 49 are moved away from each other the feeding rollers will be driven by shaft 29 instead, the spacing'of successive items being determined by the setting of the pawl-124. It is preferable, however, to drive the feeding rollers by shaft 28 when a spacing is desired that does not conform to the successive advancement of segment 50 corresponding to a ratchet tooth space, otherwise scale 109 may not correctly indicate the number of items that may be printed.

Themachine may be adjusted so that the item printing limiting mechanism is inoperative while segment 50 is driving the feedingrollers. To this end latch 125 may be retained in disengaged position with respect to ratchet teeth 119 by a pawl 132 (Fig. 3). Segment 50 will therefore, be returned to normal after being actuated during each pa r feeding operation.

previously stated the items listed are chine also provides for this to give a differ- .ent spacing before and after total printing operations in the following manner.

The particular mechanism for controlling machine operations to print a total of a group of items either automatically or manually is shown and described in the Lake Patent No. 1,379,268 and in the present construction numeral 133 (Fig. 3) indicates a magnet which controls the spacing of thepaper upon instituting total printing operations. As shown in Fig. 8 this magnet 1s 111 .series. connection with cam controlled contacts 134 which close so as to energize magnet 133 before a total printing operation is instituted and performed in the manner explained in the Lake patent. Prior to total printing. operation the paper will, however, be spaced by the usual item spacing mechanism to additionally separate the item from the total. In this case shaft 29 is utilized to drive the feeding rollers and the extent the paper is fed between successive item printing operations in proportional to the setting of finger piece 123 and where items are merely listed on a long work sheet (Fig.

i 14), a space is provided before and after each total printing operation. When it is desired to have a paper feed before and after a total taking operation the feeding rollers are driven b shaft 29, the operating connection being rom gear segment 50. Pawl 125isadjusted to be held out of engagement with the ratchet teeth 119 by pawl .132 so that segment 50 may be returned after each actuation by pawl 118 and the block 126 is preferably adjusted to the dotted line position shown in Fig. 3.

: Upon the initiation of a total taking operation cam'contacts 134 close immediately to energize magnet 133. The cam portion 135a (Fig. 3) will thereupon rock arms 139 and 141 and since block 126 is in direct contact with a finger 142 of arm 141 segment 50 will be depressed to feed the paper strip before a total printing operation. As the dwell'135b of cam 135 is in operative relationship with the roller of arm 139, paper feeding operations will be suspended and a total printing operation will occur during this'time. Subsequently the cam ortion 1350 will rock arms 139 and 141 urther to again feed the paper strip after the total printing operations. When printing upon a long work sheet this will provide for a head space between the last printed total and the next group of items to accommodate preprinted matter. By adjusting block 126 to provide for a lost last item printing position on the 'sheet if' a total should be taken before a predetermined number of item printings have been effected. In this instance pawl 125 is released to hold segment 50 in its succes sively advanced positions, block 126 gradually approaching finger piece 127. If a total taking operation should be instituted prior to the time that block 126 has completed the length of its travel which is commensurate with the number of items to be printed, magnet 133 will then be energized resulting in a downward movement of arm 141 and as finger 142 contacts with block 126 it will move segment 50 the remainder of the distance. This will result in feeding the paper strip the distance it would have been if a predetermined number of item printings was effected, (see example shown in Fig. 15).

In this instance as arm 141 is depressed a camming finger 144 thereof will coact with a lug 145 of pawl 125 disengaging it from ratchet teeth 119 to permit the advanced parts to be returned to normal simultaneously with the return of arm 141. Since contacts 129 are opened operation of the tabulator will be stopped.

In total taking operationsit will be observed from the circuit diagram (Fig. 8) that when the lever 115 is in the position shown the circuit for magnet 133 is established from the left side of the line 111 to the right side of the line 112 through cam controlled contacts 134i The listing control lever 115 is also shown in Fig. 3 and is adjusted by an arm 150 connected thereto by a link 149, said arm having two possible positions. ,When the arm 150 is moved to the non-list position contacts 113 will be opened and contacts 146 closed. At the same time a pin 147' carried by an extension of the pawl 125 cooperating with a closed slot in the link 149 will hold tions may be controlled by either magnet 97 or 133. When lever 115 (Fig. 8) is adusted to the non-list position the circuit through magnet 97 will be closed by closed feeding contacts 146 and cam controlled contacts 134. Levers 45 and 49 (Fig. 2) are adjusted towards each other when it is desired to space a wide paper sheet by driving shaft 28. The extent of spacing of the totals, in this instance, will be controlled by the setting of finger piece (Fig. 4).

When it is desire to space the paper strip for totals by driving shaft 29, levers 45 and 49 are ad usted towards each other. Spacing of the record strip will occur before and after total printing operations, as previously described. Block 126 is preferably removed from frame 120 so as not to stop the machine after the first total printing operations.

"Attention is directed to the fact that when the control lever 115 is in the position shown in Fig. 8 the attachment may be conditioned so as to print the items in the usual manner on one record sheet and the totals on the other as illustrated in Fig. 2. In this instance lever 45 (Fig. 2) is adjusted to the right so as to establish a connection between shaft 28 and the pairs of feeding rollers C, D. Segment 51 will therefore drive the rollers C, D to space the items (see Fig. 2 The lever 49, however, is adjusted to the right so as to establish a connection between shaft 29 and feeding rollers 'A, B. Total segment 51 (Fig. 4) will, therefore, drive shaft '29 and rollers A, B whenever a total is taken.

It has been assumed, referring particular- 1y to Fig. 9, that a rigid connection is established between gear 58 and a gear 62. A difierent connection is preferable in order to be able to turn the feeding rollers inde pendently slightly to conform to some predetermined spacings, such as those governed by printed lines. Without the present connection or equivalent construction a spacing less than that controlled by the interdental s aces of alinin wheel 57 (Fig. 3) coul not be provi ed for. Gear 58 is adapted to mesh with a'pinion 60 pivotally mounted on an annular ring 61 which is loosely mounted on the hub of the gear 62. Pinion 60 is' of sufficient width to mesh with gear 62. As gear 58 rotates, pinion 60 will be driven in an opposite direction and as it rolls over gear 58 it will drive gear 62. Gear 58 is preferably formed with the smaller number of teeth than gear 62, and in the present embodiment gear 58 has twenty-eight teeth while gear 62 has thirty teeth. It will be understood, there fore, that if a feeding roller is clutched to shaft 29 and the shaft turned slightly by knob 64, gear 62 will rotate pinion 60 slightly but due to the relative dimensions of the teeth of pinions 62 and 58, the pinion 60 may rotate slightly without rotating gear. 58. Thus shaft 29 may be given an independent movement to bring the paper sheet to the proper printing position.

While there have been shown and described and pointed out the fundamental novel features of the invention as appliedto a single modification it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims:

What is claimed is- 1. In a machine of the class described the combination with a printing mechanism adapted to list data upon record sheets, of a plurality of pairs of feeding rollers, a driving rack operable automatically as an incident to listing operations, selective means whereby either pair or a plurality of pairs of feeding rollers may be driven by the driving rack, means for retaining the rack in successively operated ositions, and a control device movable with the rack for redetermining the number of sheet fee ing operations.

2. In a machine of the class described the combination with a printing mechanism adapted to list data upon record sheets interposed between a single or a plurality of pairs of feeding rollers, of driving means comprising a rack member, selective means *whereby a single or a plurality of pairs of feeding rollers may be driven by said rack member, said rack member being provided with means for determining the number of sheet feeding operations. 7

3. In a machine of the cla$ described the combination with a printing mechanism adapted to print items or totals u n record sheets, of se arate pairs of feeding rollers each be' a apted to feed the related record sheet, a riving means automatically driven when the printing mechanism is effective to print items, a separate driving means automatically driven when the printing mechanism is effective to print totals,'and selective means whereby either driving means may drive any desired pair of feeding rollers.

4. In a machine of the class described the combination with a printing mechanism sive items and totals, and adjustable means for controlling the line spacing means to automatically vary vthe spacing between a printed item and total.

5. A machine of the clas described inv eluding in combination, a printing mechanism adapted to effect printing operations upon a record sheet, and selective means whereby said record sheet may be spaced automatically as an incident to successive item printing operations or successive but different total printing operations and without intermediate item imprints. W

6. A machine of the class described including in combination, a printing mechanism adapted to effect printing operations upon a record sheet, selective means including a single drivingo member whereby said record sheet may bevspaced automatically as an incidentto successive item or successive but difi'erent total printing operations and means controlled by the driving member for predetermining the number of successive items or successive totals that may be spaced on a sheet.

7. A machine of the class described including in combination, aprinting mechanism for printing items and totals upon a record sheet, means forlfeeding the record sheet to space successively printed items, a cam, and record sheet feeding means operated by and during a single revolution of said cam whereby said record sheet is spaced prior and subsequent to total printing operations. A

8. A machine of the class described including in combination, a printing mechanism 'for printing a total of a series of items on a record sheet, a' cam, and means operated by and during a single revolution of said cam for feeding said record sheet prior and subsequent to total printingoperations.

9. A machine of the class described including in combination, a printing mechanism adapted to list items and totals on a record sheet,'a pair of feeding rollers cooperating with said record sheet, intermittent y actuated means for driving said feeding rollers to space the record sheet as an incident to item printing operations, and a cam automatically operable as an incident to total carried by said rack member for predetermining the number of items to be listed.

12. In a machine of the class described, the combination with a printing mechanism adapted to print upon record sheets, of a plurality of pairs of feeding rollers, a common driving means therefor automatically operable as a result of a printing operation for driving said rollers to feed said record sheet in an alternating sequence with respect to printing operations, and selective means whereby either pair of feeding rollers may be driven by the common driving means.

13. In a machine of the class described the combination of a printing mechanism for printing totals on a record sheet, and a cam'having cam portions effective for spacing the record sheet prior and subsequent to total printing operations, said cam having a dwell intermediate said cam portions and ineffective during the rotation of the dam to space the work sheet while total printing operations are being effected.

14. In a machine of the class described, the combination with a printing mechanism for printing items and totals on a rec- .ord strip, of record strip spacing mechanism automatically operable when the printing mechanism is efi'ecting item printing operations on one strip, supplemental record strip spacing mechanism automatically op erable when the printing mechanism is effecting total printing operationson another strip, and selective means whereby the first mentioned spacing mechanism isvalso automatically rendered operable when the printing mechanism is printing totals on both strips. g a

In testimony whereof I hereto aflix my signature.

- FRED M. CARROLL.

printing operations and by a single revolu- 11. A machine of the class described comprising in combination, a printing mechanism adapted to print items on a record sheet, a pair of feeding rollers cooperating with said record sheet, a rack member adapted to drive said rollers, means for holding said rack member in successively advanced positions, and an adjustable device

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