US1397774A - muller - Google Patents

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US1397774A US1397774DA US1397774A US 1397774 A US1397774 A US 1397774A US 1397774D A US1397774D A US 1397774DA US 1397774 A US1397774 A US 1397774A
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    • G06C21/00Programming mechanisms for determining steps to be performed by the computing machine, e.g. when a key or certain keys are depressed
    • G06C21/04Conditional arrangements for controlling subsequent operating functions, e.g. control arrangement triggered by a function key and depending on the condition of the register
    • G06C23/00Driving mechanisms for functional elements
    • G06C23/04Driving mechanisms for functional elements of pin carriage, e.g. for step-by-step movement


1 97,774. Patented Nov. 22, 1921'.
1,397,774. Patented Nov. 22, 1921.
Patented Nov. 22, 1921.
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Nm ak R. L. MULLER.
Patented Nov. 22, .1921.
1,397,772. Patented Nov. 22, 1921.
1,397,774. Patented Nov. 22, 1921.
Specification of Letters Patent.
Patented Nov. 22, 1921.
Application filed December 23, 1918. Serial No. 268,065.
T 0 all 20 7mm it may concern Be it known that I, ROBERT L. MULLER, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Adding-Machines, of which the following is a specification.
My invention provides an adjunct to the commercially familiar adding and listing machine as the same has been somewhat highly developed in recent years in the matter of bookkeeping functions. I refer in particular to that line of development which has to do with tabulations through the lateral shift of a paper carriage, the machine being adapted to make bookkeeping entries as, for example, upon a relatively wide ledger sheet of a loose-leaf ledger system. The invention adapts itself to a machine of this character whose registering mechanism is such as to perform subtraction as well as addition, and so care for both charge and credit items.
The development referred to has extended to the point of providing for an automatic succession of operations of the machine by motor,involving tabulating shifts of the paper carriage and in turn a control of the motor by the paper carriage.
It has been common heretofore to equip the paper carriage with controlling devices, such as tappet pieces, cams, and rollers, which, through cooperation with various settable elements of the machine, determine just how the machine shall perform, in the matter of registering and recording, with the paper carriage in its different columnar positions. Such devices have been made adjustable so as to provide for various settings as regulated by the particular accounting work in hand, and in order to avoid numerous adjustments when changing from one kind of accounting work to another, it has been the practice to employ interchangeable carriers for the controlling devices, such as rods or bars detachably mounted in the paper carriage. Thus, on one such bar the controlling devices would be set so as to provide for one kind of accounting entries, for example those pertaining to charge items, whereas a different bar would have controlling devices arranged upon itin such manner as to take care of a different set of entries, for example those pertaining to credit transactions. In certain classes of work this would occasion frequent interchange of bars or rods, involving in each instance release of fastenings, removal of one bar, insertion of another, and then readjustment of the fastenings.
Now by my invention I go a step further and do away with the necessity for any interchange of bars or rods, or any removal of one set of controlling devices and substitution of another, when occasion arises for alternating between two different sorts of bookkeeping entries. Thus I provide for changing cooperative relationships between controlling devices, which remain upon the carriage, and the settable elements of the machine, by simple manipulation of a fingerpiece. In the form of embodiment of my invention here shown this involves the mere shifting of a slide-plate between two positions, such slide-plate being permanently mounted upon the paper carriage.
Referring to the drawings which accompany and form part of this specification, Figure 1 represents a left-side sectional elevation of the complete machine, except for omission of some well known parts, such as the total key system of links and levers and the ink ribbon feeding mechanism with which it is not necessary to deal; Fig. 1 is a detail elevation showing certain parts omitted from Fig. 1 to avoid confusion of dotted lines; Fig. 1 is a sectional elevation on a plane farther over in the machine, that is to say adjacent to what is known as the printing section, and this view is confined to a limited area thereabout; Fig. 2 is a right-side sectional elevation of the machine, omitting most of the interior mechanism which it is not necessary to here illustrate, this View having principally to do with motor control mechanism; Fig. 2* (sheet 6) is a detail elevation looking rearward and on a plane indicated by the line 2 -2 of Fig. 2; Fig. 3 is a detail elevation of an en.-
larged sca e and-under a different setting of 100 certain parts which appear less clearly at the upper middle portion of Fig. 2; Fig. 3 is a detail elevation of certain other parts, illustrating an adjustment of them which is clifferentfrom that shown in Fig. 2; Fig. 3
is a View similar to Fig. 3, illustrating a difi'erent condition from that obtaining in either Fig. 2 or Fig. 8; Fig. 4 is a horizontal section taken substantially on the line 44 of Figs, 1 and 2 with some parts broken 11 an enlar ed scale taken on line 4 4 of.
Fig. 4; ig. 5 represents an example of work, the left-hand portion representing part of a customers statement and the righthand portion part of a ledger sheet; Fig. 6 is a rear elevation of the lower portion of the paper carriage and part of the back panel of the machine, some parts being broken away for purposes of clearer illustration; Fig. 6 illustrates the construction at the extreme right where the tabulating rod is extended to receive a stop finger or dog; Fig. 7 is a sectional lan view taken substantlally on the line 7 of Fig. 6; Fig. 8 is a similar sectional plan view but with certain parts broken away and further differing from Fig. 7 in that a different adjustment 'of parts is illustrated; Figs. 9, 10, 11 and 12 are respectively vertical cross sections taken on lines 99, 10-10, 11-11, of Figs. 6'and 7 and 12-12 of Fig. 8; Fig. 13 is a sectional rear elevation illustrating tally roll devices and omitting parts not directly concerned; Figs. 14 and 15 are detail crosssections on lines 14-14 and 15l5 of Fig.
13; Fig. 16 is a detail perspective view of a certain lugcarrying rod of the hammer blocking mechanism; Fig. 17 is aperspective View of certain parts of the subtraction control.
Ua-Wiage control equipment.
Inasmuch as the invention relates essentially to the equipment at the rear of the machine, having to do with the functioning of partsmounted upon the paper carriage and'is not necessarily characterized by the particular performances of the mechanism of the machine proper and the control of the carriage equipment, I shall first proceed to describe, the specific carriage control equipment without stopping to follow through the various effects produced in the operations of the machine proper under that control. With regard to settable elements of the machine proper with which elements the controlling devices on the'carriage directly cooperate, it will sufiice for the present to refer to a gang of lever arms spaced rearwardly from the back panel of the machine casing. Said panel is designated by the numeral 2 and there is secure to it a rearwardly extending tubular bearing piece or sleeve 3 beyond which are located the lever arms above mentioned, the same being designated respectively 4, 5, 6 and 7. The latter (7) is fastened to a shaft. 7 a (Fig. 4) and the other arms are fastened respectively to sleeves 4", 5 and 6 which are nested together and with' said shaft, these nested parts running through the bearing sleeve to the interior of the machine. The lever arms appear'in most of'the figures of the drawings and legends are applied to them which .indicate the sort of control they exercise re- The next arm, 5, has the legend Non-add,
indicating that it functions in the matter of keeping out of action the registering mecha-:
nism in an operation of the machine. The next arm 6 is labeled Repeat which indicates that it functions in a motor-driven machine in connection with automatically successive operations of the machine. The remaining arm 7 is labeled Hammer block, which signifies that it functions in connection with the printing operations of the machine by way of eliminating imprints, this being done selectively as between different subdivisions of the printing devices.
All of said lever arms project upwardly and to the left as the parts are seen from the rear, and at their ends their upper edges are of cam formation (varying to some extent as between the arms) to cotiperate with the controlling devices mounted upon the paper carriage, which devices, in the present construction, take the form of rollers. A number of sets ofrollers are here shown laterally spaced apart, and at certain places there are two or more rollers to a set. In view of the variety of effects produced by these rollers of the several sets, I shall desig nate them by separate reference numerals as I proceed with the description. (It will, of course, be understood that the number and arrangement of rollers may vary indefinitely and that the particular arrangement here shown and described is merely a typical one suited to the character of book-entries which I have selected for the purposes of the present disclosure). The invention is more particularly concerned with the multiple sets of rollers located where the section lines 99, 10-10, 11l1 appear in Fig. 7. and I shall now proceed with a description of these rollers, referring particularly to that figure of the drawings. and to the sectional views Figs. 9. 10 and 11.
I have already mentioned the fact that .the control rollers are carried upon the paper carriage. The frame of this carriage is designated 8 and its end plates are designated 8. The familiar oscillatory tabulating rod 9 extends between lower portions of these end plates. Above and a littlet-o the rear there is another rod 10 extending between these end plates, its squared ends occupying correspondingly shaped notches in the rear edges of the plates and the rod being held in place by latches 11 which engage cud-studs of the rod. The rod is prevented from rotating by reason of its squared ends engaging the aforesaid notches, and it is this rod which carries all of the control rollers. The rod is grooved from end to end in its rear side to provide for adjustably loeating the rollers or sets of rollers along it. It will of course be understood that the particular location of the rollers must be regulated by the tabulation being dealt with, the latter being determined by the adjustment of familiar stop-fingers 12 along the other rod 9 for cooperation with the usual fixed stop-piece on the back panel of the machine. (This stop-piece which is of yoke form maybe seen in Fig. 1 where it is designated by the numeral 13). There is a collar 14 for each roller or set of rollers, which collar embraces the rod 10 and has a screwthreaded socket to receive a bearing stud, in the form of a bolt 15 upon which the roller or rollers are journaled. A saddle 16 occupies the groove of the rod and projects on both sides of the collar (right-hand end of Fig. 8) and the bolt has a reduced inner end which bears against the saddle to clamp it in place and thus hold the collar at the desired lateral position upon the rod.
, Referring now to the construction especially illustrated by Fig. 9, there is a roller 17 adjacent the collar 14 which in this instance has a stepped hub-like formation, the larger portion of which registers with a recess of the roller into which recess the smaller portion of the hub-like formation extends. A spring l7 surrounds the latter and tends to thrust the roller rearward, or to the right as the parts are here seen. The roller. itself has a hub which spaces it from a compound roller composed of two grooved sections 18 and 19. Rearwardly beyond this compound roller, and spaced from it slightly by a washer, there is j ournaled upon the bolt 15 an arm 20, the hub of which is of cam formation as best seen in Figs. 7 and 8. Beyond the hub of this arm there is secured to the bolt, just behind its head, a collar 21 having a cam formation complemental to that of said hub. Under the condition illustrated by Fig. 9, and also by Fig. 7, the high surfaces of the two cams are in en gagement with-each other, in consequence of which the spring 17"" is compressed and the rollers held forward, which establishes a certain cooperative relationship between them and the before-mentioned lever arms to be hereinafter specifically referred to in connection'with a typical example of accounting work.
Before proceeding to a detailed description of the other and somewhat different constructions and arrangements of the two other sets of rollers, it may be well to point out that a swinging of the arm 20 counterclockwise from the position in which it appears in Fig. 6, will result in carrying the high surface of the cam hub of said arm past the high surface of the cam collar '21, so that the spring 17 a is permitted to thrust the rollers rearward, or to the right as the parts are seen in Fig. 9. The result of this will of course be to differently relate the rollers to the lever arms. Thus, whereas under the condition illustrated by Fig. 9 the sections 18 and 19 of the compound roller engage the Non-add and Repeat lever arms respectively, and the roller 17 is forwardly beyond all of the arms, yet when the rollers have been thrust rearward by the spring, the roller 17 will be alined with the Subtract lever and the compound roller will be alined with the Repeat and Hammer block lever arms, and both rollers will be out of alinement with the Nonadd lever arm, as shown in Fig. 8. Of course, it will be understood that the shifting of the rollers one way or the other is not done. at a time when they are over the lever arms because, as will be obvious from Fig. 9, the rollers would be obstructed by. one or more of said arms.
Referring next to Fig. 10, there isa triple compound roller journaled on the bolt 15 and spaced from the collar 14 by.a washer 26, said roller comprising two. sections 27 and 28 of the same diameter, and a section 29 of smaller diameter. There is another roller 30 of larger diameter than any section of the compound roller and it is recessed so that the small section 29 may telescope within it as illustrated in this figure of the drawings. The compound roller is recessed to accommodate a spring 31 which surrounds the bolt 15 and tends to thrust the roller 30 rearward, or to the right as the parts are seen in Fig. 10. An arm 32, which is a counter-part of the arm 20, is journaled upon the bolt 15 rearward of the roller 30, and a cam collar 33, which is a counterpart of the cam collar 21, is secured to the bolt behind its head. The effect of swinging the arm 32 counterclockwise is the same as in the case of the arm 20, except that in this instance the spring does not thrust the set of rollers forward, but only the roller 30 of the large diameter. As the parts are illustrated in Fig. 10, the latter roller is alined with the Hammer block lever arm and is depressing the same to the maximum extent. The small section 29 of the compound roller is, of. course, inactive, being contained within the'large-diameter roller 30. The other sections 27 and 28 of the compound roller are alined, respectively with the Non-add lever arm and the Repeat lever arm. Forward shifting of the large diameter roller uncovers the small diameter section 29 of the compound roller, and the latter then functions to depress the Hammer block lever arm to the minimum extent. In connection with the description hereinafter to be given of a typical example of work, it will be explained how varying degrees of depression of this particular lever arm will result in varying extents of hammer-blocking.
Referrin next to the construction illustrated by Fig. 11 here, there'is simply a double or compound roller oftwo sections 40 and 41 of the same diameter. A spring 42 surrounding the bolt 15 between this compound roller and the collar 14 tends to thrust the roller rearward and in Fig. 11 it is shown in its rearward position. There is an arm 43 of similar character to the before-described arms 20 and 32, which arm is journaled upon the bolt 15 rearward of the compound roller, and there is also a cam collar 44 similar to the cam collars 21 and However, there is a reversal of the cam relationship here; thus, when the high surfaces of the previously described cams are in engagement as illustrated in F ig..7, and also in Figs. 9 and 10, the opposite is true of the cam hub of arm 43 and the cam collar 44, so that the spring 42 holds the compound roller 40-41 rearward, as shown in Figs. 7 and 11'. The counterclockwise swinging of the arm 43, in unison with such swinging of the arms 20 and 32, has the effect therefore of forcing the compound roller 40-41 forward and compressing the spring 42. Having reference to relationship of rollers to lever arms, the sections of the roller are alined, respectively with the Repeat and Hammer block lever arms under the Fig. 11 condition, whereas when the arm 43 has been swung counterclockwise the sections 40 and 41 of the roller are alined, respectively, with the Non-add and Repeat lever arms, as shown in Fig. 12. As hereinafter pointed out, however, the Repeat lever arm is in neither case actually in. .a state of depression when the rollers come to' rest under the tabul ating shift which carries them over the lever arms.
We have just above referred to the swinging of the several cam arms 20, 32 and 43 in unison. This is accomplished through their connections with a slide-plate 50 which is mounted upon the upper side of a square rod or bar 51 extending between the end 8 of the paper carriage frame. This plate is slotted longitudinally at three places adjacent its rear edge, as clearly illustrated in Fig. 7, for the purpose of adjustably accommodating three fingers 52 which engage respectively, the forked upper ends of the aforesaid cam arms. As clearly illustrated in Figs. 9 to 11, each finger is part of a small plate which spans the associated slot in the slide-plate and has lugs 53 projecting up into the slot. A short bolt 54 running down through the slot and through the finger-plate, together with a nut 55 constitute clamping means for holding the finger'at the proper position along the slot of naomve the slide-plate. The latter is longitudinally slotted adjacent its rear edge where it overlies the square rod 51 and the plate is held.
upper ends, washers 58 being interposed between thenuts and the bar to prevent binding. At its left-hand end (as the parts are viewed in Figs. 6, 7 and 8) the slide-plate has a down-turned lip 50 which is bentunder the bar 51. This lip carries a hublike piece 60 in which slides a plunger 61 (Fig. 8) adapted to engage one or other of two sockets 51 in the bar. A spring 62 surrounding the plunger within the hub 60 tends to enforce the engagement. A head 61 on the plunger serves as a handle by which to withdraw the plunger from the socket and also to shift the slide-plate one way or the other. 7
In Fig. 7 the slide-plate is shown set over to the right with the plunger occupying a corresponding socket, whereas in Fig. 8 the lide-plate is shown set over to the left. Under the particular set-up here shown the latter position of the slide-plate ordains a relationship of rollers and lever arms which provides for the proper control of machine-functioning when credit entries are being handled. The other position of the slide-plate, that illustrated by Fig. 7 and also by Fig. 6, establishes the proper cooperative relationship for controlling the functioning of the machine when charge items are being handled. It will be noted (Fig. 6) that appropriate inscriptions are marked upon the bar adjacent the sockets,-- Cr. and Ch.
In connection with accounting work of the particular kind chosen for purposes of responding diameter and a. section 72 of smaller diameter. Then toward the opposite end of the bar and beyond the three sets of shiftable rollers, there are three single rollers laterally spaced along the bar, two of these, designated 73 and 74, are spaced a short distance apart and both of them are alined with the Repeat lever arm. The third rolled 75 is alined with the Hammer block lever arm.
Tally roll control.
Before proceeding to deal with the typical example of work illustrated by Fig. 5, it will be well to point out certain auxiliary devices which are under the controlof the slideplate. These have to do with the use of a tally roll]? The tally roll is a well known thing as applied to Burroughs adding machines, and reference may be had in this regard to theLundgren patents 1,195,598 and 1,195,599, both issued August 22, 1916. Inasmuch as the bringing of the tally roll into printing position may be desirable in conjunction with different tabulating shifts of the carriage when dealing with different kinds of book entries, I provide for controlling certain tally roll tappet devices upon the carriage through the same manipulative means which operate to change the adjustment of carriage rollers. Thus in the present instance I equip the slide plate 50 with means for alternating between two tappet pieces in the matter of their effectiveness to move the tally roll into printing position. This equipment appears in Figs. 6, 7 and 8, but is more fully illustrated by Figs. 13, 14 and 15, a portion of the tally roll carriage being illustrated in Fig. 13. It is there designated by the numeral 76 and is illus trated as mounted to slide with the rod 7 6 which conveniently serves as a pintle for the hinges of the back panel of the machine, as in thecase of the Lundgren construction above referred to. A spring 76 .normally holds the tally roll carriage out of printing position. It is shifted into printing position by the action of one or another tappet piece on the main paper carriage against a spring-held pivoted tappet blade 7 6 mounted upon the tally roll carriage.
Now in addition to the regular tabulating fingers 12, adjustably secured at intervals to the rod 9, there are similarly secured upon that rod at appropriate points, suitably spaced apart, a pair of collars 77 with depending bifurcated lugs between which are pivoted tumbler tappet pieces 7" and 77 They are of general rectangular form and when either is set with its longer dimension extending vertically, it will operate against the tappet blade 76 to carry the tally roll carriage into printing position. The spacing apart of the two tumbler tappet pieces corresponds with a columnar shift of the main paper carriage, so that when one of these pieces is set to operate the tally roll carriage it will interpose the tally roll between the printing type and a column space of the ledger sheet which is next to the column space of that sheet between which and the printing type the tally roll will be interposed when the other of the two tappet pieces is set into effective position.
The tumbler tappet pieces are operated by a slide bar 78 which fits a groove in the under side of the rod 9. This slide bar is notched at 78 and 78. in its under edge near its opposite, ends. The tumbler tappets have oblique tail pieces at upper corners, the same being designated respectively, 77 and 77 and projecting into the notches 78 and-78 respectively. The location of the tail piece of one tappet is the reverse of the location of the'tail piece of the other tappet, so that when the slide bar 78 has been shifted one way (as to the right in Fig. 13) one tappet (77 will be held with its longer dimension. extending vertically, and when the said bar has been shifted the other way the reverse condition will obtain. Dotted lines in Fig. 13 illustrate the latter, and it will be understood that in the shifting back and forth of the bar 78 the walls of its notches 7 8 and 7 8 operate upon the tails of the tappet pieces to turn them upon their pivots one way or the other through ninety degrees, a straight edge of each tappet piece being brought to bear against a straight portion of the under edge of the bar. It will of course be understood that 1 when one of these tappet pieces is turned with its shorter dimension extending vertically it will be wholly above the tappet blade 76 on the talley roll carriage. Obviously, the tappet piece 77 will move the tally roll into printing position in a tabulating shift of the main paper carriage occuring ahead of a tabulating shift of said carriage in which the other tappet piece 7" can move the tally roll to printing position. In the present instance the latter tappet piece is effective under the charge adjustment of the slide plate 50, and the other tap-, pet piece 77 b is effective under the credit a-djustment of said slide plate.
The shifting of the said bar 78 is done through the medium of a bracket 79 a horizontal portion of which overlies the plate 50 and is longitudinally slotted for adjustable connection therewith and with the square rod 51. A depending portion of the bracket is carried around the rod 9 and terminates in a finger 79 projecting rearwardly between two spaced lugs 7 8 on the under edge of the slide bar 78. When the slide plate is shifted one way this finger operates upon one of these, lugs to establish the conditions illustrated by the full lines in Fig. 13, and when said slide plate is moved the other way the reverse conditions are established which are illustrated by t-he'dotted lines in said figure. 7 Functions of carriage-controlled eZemen-ts,
Subtraction, repeat, nowaad, and hammer block.
As a further preliminary to specific refer ence to the typical example of work hereinbefore referred to as being illustrated by Fig. 5, it will be well to explain somewhat further the functioning of the several lever arms without, however, for the present describing in detail the somewhat complicated connections which lead from the lever arms to different departments of the machine. As
before stated, the foremost lever arm 4 0perates to set connections for converting the registering mechanism of the machine from an adding to a subtracting condition. The effect is the same whichever one of the rollers on the carriage rides upon and stands over this particular lever arm with the arrival of the paper carriage at some certain columnar position. The registering mechanism is substantially identical with that of the Rinsche Patents Nos. 1,172,484 issued February 22, 1916 and 1,179,564, issued April 18, 1916. '1he effect of depressing the lever arm 4 is to set certain connections which, when the machine is then operated, cause the registering wheels 916 to be disengaged from the racks 610, and then the cradle 910 to be rocked clockwise (on its pivot 910) in the main register frame 910 for engagement with the racks 610. At the beginning of the second half cycle of operation of the machine these intermediate pinions will be brought into mesh with the racks and as the operation proceeds, theregister wheels 916 will be turned backward through the medium of said pinions. All of this is fully explained in said Rinsche patents and so-will require no detailed description here.
The rocking of the main register frame 910 to engage and disengage pinions and racks (either register pinions 916 or intermediate pinions 916) is done in the familiar way, the action being initiated by the operation of a wiper-pawl 821 upon a stud of a three-armed lever 913; Now it is a familiar expedient in these Borroughs machines to keep registering pinions out of engagement with racks throughout an operation of the machine by disabling the said wiper-pawl.
In the present instance the .lever arm 5 functions to set certain connections which will so disable said wiper pawl, and this applies whether the registering" mechanism is at the time in adding or substrating condition. This will occur whenever any one of the rollers on the carriage rides upon and stands over the said lever arm 5 .in any certain columnar position of the carriage.
The motordrive is in general similar to that disclosed in a number of prior patents, as for example, the Vincent Patent 866,7 50 issued September 24, 1907, and the Kilpatrick Patent No. 928,981 issued July 27, 1909. Reference may also be had to the Lundgren Patent 1, 033,109 issued July 23, 1912 and to the Rinsche Patent 1,120,746 issued December 15, 1914, for examples of repeat mechanisms applied to this motor drive, though for a somewhat different purpose than that here concerned, in that Lundgren. and Rinsche were dealing with the matter of automatic repetition of operations for multiplication. case of the two last mentioned patents, there is a latching down of the motor release or In the present instance, as in the clutch closing devices when the starting bar tion. Thus when one of the carriage rollers stands over and depresses the said lever arm 6, certain familiar key-releasing mechanism is prevented from performing its function and also prevented from performing the additional function of unlatching the motor release or clutch closing devices. Consequently when the machine operates with the carriage in a columnar position with one of its rollers depressing the said lever arm, there will automatically ensue another operation of the machine by the motor.
It will of course be understood that as an operation of the machine concludes, the paper carriage is released from the columnar position in which it has been standing throughout the operation and is automatically shifted tothe next columnar position.
It will further be understood that in order to provide for the making of entries of the character shown in Fig. 5, which include date. entries, designating or folio entries, and amount entries, it is necessary for the keyboard of the machine to have a large capacity. In the present instance it may be assumed that three rows of keys counting from the left when viewing the machine from the front, are devoted to the setting up of the date entries, and that the next five rows of keys are used for the setting up of designating numbers, and that the remaining rows of keys are employed for the setting up of amounts. This occasions subdivision of the printing mechanism into as many as three groups, which is commonly referred to in the art as splitting and is ordinarily done by omitting over-lapping tails of hammer-releasing latches at the division points, and so preventing the tripping of one latch by another at these points.
The remaining levenarm 7 functions in the latter connection to prevent the execution of printing strokes by the hammers in one or more of these divisions of the printing mechanism. It will have been observed that thereare three different sizes of carriage rolle'rs which operate upon the lever arm 7. Thus provision is made for setting the lever varm in any one of three different positions according to how far it is depressed. The hammer-blocking devices of the present machine are So organized that when the said lever-arm is depressed to the least extent, as'e. 9., by the small roller 72, the hammers of the middle division only are prevented from exec'1t1ng printing strokes, this being the dIVlSlOIl for printing designating or folio numbers. De-
pression of this lever-arm to a greater extent as by the middle-sized rollers 19 or 41 will result in preventing the hammers of both that middle-division and the hammers of the date division from executing printing strokes. When the lever arm is depressed to the greatest extent, as by the large diameter roller 30, all divisions of the hammers will be disabled.
Ewample of work.
Referring now to the example of work represented by Fig. 5, and assuming that a ledger sheet A is inserted in the paper carriage of "the machine, and that alongside of it to the left there is inserted a customers statement sheet B, the paper carriage will be first moved by hand to its extreme lefthand position wherein the roller 75 may. function to prevent any date or folio printing. With the carriage in this position, the customers old balance is set up and the machine operated once to print and register that amount. In the example here given it appears first as $500 and is printed on the top line of the ledger sheet at the extreme right. The registering mechanism of the machine is, of course, in adding condition at this time. The paper carriage is then moved by hand to its extreme right-hand position wherein the left-hand or charge section of the customers statement sheet is in position to be printed upon. In this position of the carriage its rollers 70, 71 and 72 stand over the lever arms 5, 6, and 7, respectively. The date, folio number, and amount to be charged are set up on the keyboard and the motor starting bar is depressed and becomes latched down. Thereupon the machine goes through a cycle of operations but as the lever arm 5 is depressed the registering mechanism is kept out of action and as the lever arm 7 is depressed to the least extent, the date and amount will be printed but the folio number will not be printed (this entry 'has no place on the customers statement).
The Repeat lever arm being down, the keys will not be released at the conclusion of thisoperation of the machine and the motorstarting devices will remain latched. The paper carriage is released at the end of the operation (through familiar tabulating action) and moves over to the next columnar position in which the right-hand section of the customers statement stands opposite the printing type. Through timing devices hereinafter described the automatically succeeding operation of the machine is delayed until the carriage has taken up its new position. In this new position the first of the shiftable sets of carriage rollers comes into action, to wit: the set specially illustrated in the sectional view Fig. 10. Inasmuch as the slide-plate 50 is in the charge position, the condition will be as there illustrated no printing uponthe customers statement.
(It will be understood that this right-hand section of the customers statement sheet is for entries of credit items only.) The Non-add lever arm 5 is again down and therefore no registering operation will occur. The Repeat lever arm 6 is down as before so that the key-releasing devices are still disabled and the motor starting devices are latched down. With the conclusion of this operation of the machine the carriage is again released and shifts to the next columnar position wherein the first column of the ledger sheet will be opposite the printing type. This brings the second of'the shiftable sets of carriage rollers into action, being those specially illustrated by the sectional view Fig. 9. The Hammer block lever i not depressed, so that date, folio number and amount are all printed on the ledger sheet. The Non-add lever arm is again depressed so that the registering mechanism does not come into action. The Repeat lever arm is also again depressed so that when the carriage has automatically shifted to the next columnar position another operation of the machine will automatically ensue. The next column of the ledger sheet is used for the entry of credit items, so that when dealing with charge items there should be a blank in this column. However, it is customary in business establishments Where machines of this character are employed to use a tally roll for collecting all amount entries in a condensed list for bookkeeping purposes, and in the present instance such tally roll is automatically interposed between the type and the ledger sheet when the credit column of the latter comes opposite the type. When the carriage has shifted to this particular columnar posi-' tion its third set of shiftable rollers comes into action, to wit: the set specially illustrated by the sectional view Fig. 11. It will be noted that the Hammer blocklever arm is depressed by a middle-sized roller in consequence of which the date and folio number will not be printed upon the tally roll. but only the amount. It will be further noted that the Non-add lever arm is not depressed at all so that here the charge amount will be registered and added to'the Old balancex originally registered upon the wheels. Of course there will be no printing upon the ledger sheet because of the interposition of the tally roll. Although the Repeat lever arm 5 appears in Fig. 11 as below the roller section 40. there is in fact a release of the restrained key-restoring devices with the in the example, the carriage will be moved back to the first position, and the operations tions. Inasmuch as the example calls for the above described will be repeated for the next item which'will be added to the previous charge item in the last of the four operastriking of a new balance then, certain blank operations will now be in order so that the machine may properly be prepared for the taking of a total. Inasmuch as the machine here shown has a subtracting equipment of the character disclosed in the before-mentioned Rinsche Patent 1,172,484, it is necessary to provide for the execution of two blank operations for the reasons set forth in said patent and which need not be repeated in detail here. Suflice it to say that subtraction effects require that the so-called fugitive one shall be taken into account, and in the Rinsche construction a carrying action is had in the units order for this purpose, and this takes place during the blank operation customarily performed in all Burroughs machines for restoring the ordinary carrying mechanism to normal. The second blank operation restores the carrying mechanism of the units order. The last above described operation of the machine in doing the work represented by Fig. 5, would cause a shift of the carriage another step or to a fifth position. It may be noted here that in Fig. 6 the fifth tabulating finger 12 (counting from the right) is spaced a very short vdistance from the fourth of these tabulatin fingers, and it will be understood that a ful columnar shift is not required, because the next operation of the machine is to be a blank one. In this fifth position of the carriage the roller 73 will depress the Repeat lever arm 6 which will serve the purpose of causing the two blank operations to automatically succeed each other. It will be recalled that in the operation of the machine at the fourth columnar position the r y of the ey-board were released and the motor starting devices unlatched. Consequently an operation of the machine does and then the second blank operation automatically ensues .because of the fact that carriage roller 74 has depressed the lever arm 6 by passing over its V-shaped nose. This roller is so set as to pass on to the No. 3 po sition of Fig. 2 in order that no further automatic repeat operation will take place, The carriage does not further shift because the finger 12 then stopping it is not adapted, like those before in action, to be automatically tripped. (See Benner Patent 1,046,546, of December 10, 1912.)
The total which is the sum of the old balance of $500 and the two charge items of $345.65 and $222.45 may now be printed, $1048.10, and the machine cleared.
When credit items are to be entered the slide-plate 51 will be shifted to the position'shown in Fig. 8 with the efi'ect'before described as to change in position of rollers of the second, third, and fourth sets. The
customers statement and the ledger sheet having been again inserted, the carriage the now old balance (being the previously printed total) will be set up on the keyboard and registered as before with the carriage in its extreme left-hand position, and printed in the same column that the $500 old balance was printed and in horizontal alinement with the previously struck total imprint. When moved to the right, the carriage will not be taken all the way back to its first position, as in the case of charge items, but only to the second position where in the rollers of the Fig. 10 set are over the lever arms. The right-hand section of the customers statement will be opposite the printing type and the date and amount will be printed, upon operation of the machine at this columnar position of the paper carriage. It will be recalled that the large diameter 30 is shifted rearward out of line with the Hammer block lever arm and the small diameter roller 29 uncovered, so that it will act upon that lever. It does so with the same efiect that was produced under the charge adjustment by the small roller 72, that is to say, the Hammer block lever is depressed to the least extent and disables only the folio section of the printing mechanism. The rollers 27 and 28 act as before to depress the Repeat and Non-add. levers and with the same effect as before described. The carriage shifts to bring the first column of the ledger sheet opposite the type but this being the Charge column, there should, of course, be no printing upon the ledger sheet. However, the tally roll is interposed at this point to receive an imprint of the item and it is to be noted that the rollers of the second shiftable set are so positioned as to depress the Hammer block lever arm the medium extent and also to depress the Repeat lever arm, and the foremost roller will be moved to the seventh position, andf and the ensuing operation of the machine,
the date, folio number and amount will be printed in the second column of the ledger sheet as shown in the example. The adjustment of the rollers of the third shiftable set are as illustrated by Fig. 12, the Non-add lever being depressed so that the registerin mechanism does not come into action. ere, as before, the forward section 41 of the double or compound roller, though standing over the Repeat lever arm, is not depressing that arm, so that upon completion of the operation of the machine with the carriage in this particular columnar position, the keys are released and the motor starting devices are unlatched.
A second credit entry may then be handled, as in the'case of the second charge entry, and after that the'blank operations will be in order, and the striln'ng of the new balance of $20.55 which is the difference between the old balance of $1068.10 and the sum of the credit entries of $547.57 and $500.00.
Subtraction control connections.
Referring now to the connections through which the lever arm 4 operates to bring about a change in the registering mechanism from adding to subtracting condition, the sleeve 4 to which that lever arm is secured carries at its forward end just inside the casing of the machine, a lever arm 4 which extends oppositely tothe lever'arm 4 as best seen in Fig. 4. This lever arm 4 is notched at its extremity to embrace the rearwardly extending arm of a bell crank lever 80 (Fig. 1) which is pivoted at 80 to the rearwardly extending arm of another and larger bell crank lever 81 pivoted upon a frame stud 82. The first mentioned bell crank 80 has a forwardly extending arm which by abutting against the hub of the bell crank 81 limits the possible movement of the bell crank 80 under the action of a spring 83 which connects the depending arms of the two bell cranks. A spring 84 connects the upwardly extending long arm of the bell crank 81 with a frame stud, but this spring 84 is lighter than the spring 83,- in fact the latter is of such stiffness and strength that when the lever arm 4 is elevated the two bell cranks will rock as one unless there should be some positive obstruction to movement of the bell crank 81. The spring connection between these bell cranks is merely for the purpose of safety and comes into action only in an emergency to protect the parts in the event that there should be some blocking of or interference with the proper movement of the bell crank 81. It will be noted that in Fig. 1 the roller 17 is over the lever arm 4 depressing the same and elevating the lever arm 4 and the upstanding arm of hell crank 81 is correspondingly forced against a limiting frame stud 86 and there has been no change in relationship between this bell crank and the smaller bell crank 80.
The tip-standing long arm of the bell crank 81 carries a stud 81 which occupies a notch in the upper edge of the widened rear portion of a link 87, which portion, 87*, has a slot 87 occupied by av stud on a supporting plate 87 journaled upon the ribbon-feed shaft 501. The link 87 extends forward and is coupled to a lever 88 which projects through the keyboard and has a handle by which it may be thrown forward and back. This lever corresponds with the one designated 10 in the Rinsche Patent 1,172,484, in that it may be manipulated by the user of the machine to change from an adding to a subtracting condition and vice versa. In the present instance, however, the lever is automatically thrown through the connections just above described, provided the stud 81 is seating in the notch of the link 87. It should be noted that the link 87 can be disconnected from the bell crank lever 81 by depressing the rear end of said link in opposition to a spring 89 that upholds it. This would be brought about through the setting of a socalled Normal key, such as that disclosed in the Kilpatrick Patent No. 1,152,517 issued Sept. 7th, 1915. Depression of such key (either the one designated 35 or the one designated 205 in said patent) lowers a lever arm 87 (Fig. 1 which overlies a stud 87 on the link 87. The mounting of said lever arm and its connections with the special key or keys may be understood as being identical with the disclosure of said Kilpatrick patent, wherein the corresponding lever arm is designated 24. The parts are best seen in the perspective view of Fig. 17 wherein a portion of the-Carriage normal key stem is illustrated and also a. portion of the stem of the Counter normal key, designated respectively 145 and 145 In the present construction the lever 88 is not integral with the arm 90 (as in the prior Rinsche construction above referred to) which arm 90 does the. work of shifting the registering mechanism. This work is done in the samemanner and through means suchas disclosed in said Rinsche patent, but the power is not derived from the hand lever 88. Instead it is derived from the-motive power of the machine. A link 91 is coupled to the said arm 90 and extends rearwardly to the vicinity of the familiar power-shaft 800. The latter carries a cross-arm 92 having up per and lower studs 92 and 92 The link 7 that is, to subtraction position as illustrated a in Fig. 1, the link 93 is elevated and elevates cated at its lower end and guided upon a frame stud 94. This link has an ear 93 carrying a stud which occupies a slot 91 in the link 91. With the lever 88 thrown forward,
the link 91 so that the upper hook-shaped portion at the rear of the latter is in line with the stud 92. Consequently when the machine. operates and the power shaft 800 is driven in a counterclockwise direction, the link 91 will be forced rearwardly and will correspondingly operate the arm 90 with the effect before described of disengaging the register wheels 916 from the rack and then rocking the cradle 910 to the subtraction position. When the arm 4 is .freed by the passing on of the roller 17 in the next shift of the carriage, the spring 84 pulls back the bell crank lever 81 and lowers the link 93 so that the link 91 will be depressed bringing the shoulder of the lower'branch of its bifurcation into line with lower stud 92 of the.
cross-arm 92-, so that in the next operation of the machine, unless the arm 4 should be again depressed, the said link 91 will be thrust forward and the registering mechavnism put again into adding condition.
N on add connections.
Referring next to the connections through which the arm 5 operates to keep the registering mechanism out of operation, a lever arm 5 is fastened to the inner end of the sleeve 5 which carries said lever arm 5 and this oppositely extending lever arm 5 is notched at its end and embraces the rear end of a lever 102 pivoted intermediate its ends upon the frame stud 82 and coupled at its forward end to an upwardly extending link 103. This link is slotted at its upper end with a foot 105*.
and embraces a stud 104 carried by a lever 105 which is pivoted at its rear upon a frame stud 106 and is formed at its forward end The latter overlies a stud 107 on the rearwardly extending branch of an arm 107 which is normaly held rearward by a spring 108 so that its lower end is withdrawn from a position where it can affect the wiper pawl 821. However. when the Non-add" lever arm 5 is depressed the lever 105 is lowered and rocks the arm 107 counterclockwise so as to put its lower end in a position to be encountered by the. wiper pawl 821 and therefore prevent the latter from engaging the rear stud of thelev'er 913. The main accumulator frame 910 will ,consequentlyflbe left in its forward position (to which it is thrown at the outset of the operation of the Repeat connections.
Turning now to the motor repeat connections, that is to say the connections from the lever arm 6 through which keys are prevented from being released and the motor is caused to put the machine through operations automatically succeeding one another, and referring particularly to Figs. 2 and 2, though refernce to Figs. 1 and 4 will also be helpful, an upstanding arm 6 is secured to the forward end of the sleeve 6 which carries at its rear the said lever arm 6. An upper portion of this arm extends adjacent the back panel 2 of the machine casing, as best seen in Fig. 1, and a widened portion of the arm is slotted and embraces a stud mounted upon said panel, this being merely for purposes of limiting the vibration of the arm. The upper end of the lever arm 6 is coupled to a yoke-shaped link 110 best illustrated in Fig. 2 The central portion of this link lies closely adjacent the panel 2 and is confined by an elongated keeper or guard sleeve 111 screwed to said panel. The link extends from a point to the right of the printing sections (as the parts are seen in Fig. 4) to a point at the left thereof so that the operating connections from the lever arm 6 may reach over to that side of the machine Where the key-release devices and motor control devices are regularly located in the machine. This is the right-hand side of the machine as viewed from the front. The said link at its end toward this side of the machine is coupled to the lip-standing arm of a bell crank lever 112, the notched end of whose horizontally extending arm is engaged with the rearwardly projecting arm 113 of another bell crank lever which is pivoted upon a frame stud 114 (Fig. 2). The
"upwardly extending arm 113 of the last with which it is yieldingly connected for a purpose hereinafter mentioned, the bar 116 being longitudinally slotted to receive studs on the bar 115. A spring 117 connects one of said studs with a stud upon the bar 116, as best shown in Fig. 4. The forward end of the slide bar 116 is slottedfor guiding purposes and embraces a frame stud 118, as shown in Figs. 2 and 1, and a spring 119 applied to said bar normally holds it forward. For the present this slide bar and the companion slide bar 115 may be considered as one, so that the clockwise rocking of the bell crank lever 113-113 (Fig. 2), as caused by depression of the lever arm 6, will result in a rearward shift of the slide bar116. The effect of this will be to disable the key-releasing devices, if that is desired. It will depend upon whether or not a Repeat key 120 has been depressed. It is shown depressed and latched down in Fig. 2. It controls a certain abutment lever which is carried by the aforesaid slide bar 116 and serves to disable the key-release mechanism.
The key-release devices comprise the familar detent 228, bail rod 202, ball side piece 219, wiper pawl 623, and bell crank lever 630. These devices are so well known as to require no detailed description, it being understood that ordinarily when the full-stroke sector 311 on the handle shaft turns, counterclockwise in the first part of the machines operation, the lever 630 follows it under the impulse of the familiar spring 618, and the wiper pawl 623 passes by the roller stud 262 at the lower end of the bail side-piece 219. A familiar method of providing for repeat operations is to block the lever 630 so that it cannot follow the full-stroke sector and consequently the wiper pawl 623 will stay above the before mentioned roller stud and there will be no rocking of the bail 219 to release the keys. In the present instance this blocking is effected by the above mentioned lever on the slide bar 116, provided the Repeat key 120 is down. Said lever is designated by the numeral 121 and is pivoted intermediate its ends to said slide bar. The rear arm of this lever has a laterally projecting flange or shelf 121 which, upon rearward shift of the slide bar, may take up a position in the path of a stud 630 on the lever 630; A spring 122 connects an ear of said lever with a stud on the slide bar so as to hold the rear arm of the lever down, putting its said flange of shelf in a position where, upon rearward shift of the slide bar, it will. take up its obstructing position. The action of the spring is limited by the engagement of an oppositely extending lateral flange or lug 121 of the lever which overlies the upper edge of the slide bar.
The forward arm of the lever 121 carries a stud 121 underlying a lever arm 124. The
latter is ofirregular shape and of cam formation at the rear where it overlies the said stud, and it constitutes one arm of a bellcrank lever whose other arm 1241 is coupled to the key 120. A spring 125, which is superior to the spring 122, normally holds the forward arm of the lever down and the key 120 up and the slide bar rearward (Fig. 3 the action of this superior spring being limited by abutment of an edge of the arm 12 1 against a frame stud 125 to which the spring 125 is attached. With the key 120 up, the condition would be as illustrated in Fig. 3 the lever 121 being rocked to a position where its rear arm stands at an elevated position with its flange or shelf 121* so located that in a rearward shift of the slide bar 116 this shelf will not be interposed in the path of the stud 630 and so the downward swinging of the latter will not be interferred with and key release will take place. On the other hand, if the Repeat key 120 is down, as shown in Fig. 2, thelever 121 will have been released from restraint by the lever arm 124 and so will occupy the position there illustrated where its shelf 121 is so located that upon rearward shift of the slide bar 116 said shelf will stand in the path of the stud 630*.
The key release action is availed of in the matter of repeat operations of the machine by the motor drive. Reference may be had to the Kilpatrick Patent No. 928,981 for particulars of motor starting devices which are now quite well known in the commercial art. The reference numeral 126 designates the familiar touch bar which is mounted upon spring-connected levers 127 and 127 the former having a pin and slot connection with the familiar vertical bar 128 with which said lever is connected by a spring 129. In the present instance a latch 130" pivoted upon. the lever 126 and connected to it by a spring 131, is adapted, upon depression of the touch bar, to engage with a stud 127 upon the lever 127 and thus prevent restoration of the lever and touch bar to normal position. The condition here referred to is illustrated in Fig. 2, the vertical bar 128 being drawn upward by the spring 129 so as to close the motor clutch and start the machine in operation. It will be understood that, as in the well known construction depicted in said Kilpatrick patent, the roller stud 311 on the full stroke sector 311 will operate to depress said bar 128 and open the clutch of the motor, but with the touch bar latched down, it 'is obvious that, the spring 129 will remain in tension and the bar 128 will therefore be again elevated so that a second operation of the machine will automatically ensue.
A slide bar 1410 "arranged between the keyboard plates and drawn rearward by a spring 141 has a lateral lug 14:0? adapted to act 130 is disclosed in the aforesaid Lundgren Pat- 1 upon the upstanding tail of the latch 130. The rear end of this slide bar extends in the path of an upward extension of the bail side piece 219. Therefore when the Repeat lever arm 6 is released and the spring 119 pulls the bar 116 forward, removing the shelf or flange 121 from under the stud 630 and in an ensuing operation of the machine the key-release bail is vibrated, said upward extension of the bail side piece 219 will strike the rear end of the slide bar 140 and thrust it forward, unlact-hing the motor starting levers so that at the conclusion of the operation the vertical bar 128 will remain down and the clutch of the motor open.
A very similar motor repeat mechanism ent 1,033,108 to which reference may be made if desired for a more detailed explanation of the manner of control of the electric drive for purposes of an automatic succession of operations of the machine in connection with disablement of the key-release devices.
Reverting now to the matter of yiedingly connected slide bars 115 and 116, this characteristic is availed of in case of the machine being equipped with what is termed a Carriage normal key, such as that designated 205 in the Kilpatrick Patent 1,152,517, and here designated 145.
The lower part of the stem 145 of this key has a stud 145 engaging a slotted end of one leg of a bell crank lever 144 mounted on a frame stud 145, the upper leg of said bell crank having a squared end 144 forming an abutment which, when the key is depressed, will take up a position immediately in rear of a stud 116 on the bar 116 so that depression of the lever arm 6 by a carriage roller will merely shift the bar 115 rearward, stretching the spring 117, the bar 116 being locked and the repeat devices therefore disabled. In case the link 116 should be rearward when the key 145 is depressed, the bell crank lever 144 will so act upon the roller stud 116 as to restore the said link to its forward position.
Timing repeat operation.
I have before'alluded to the fact that a repeat operation of the machine is not permitted to take place until the paper carriage has taken up its new columnar posi tion. For this purpose I employ certain timing devices in connection with the above described repeat controlling mechanism and the above described motor starting mechanism. I have referred to the fact that with the touch bar and its levers latched down, the vertical clutch controlling bar 128 will be again elevated for clutch-closing purposes, under the action of the spring 129. Such action of this vertical bar is, however, stayed, pending arrival of the paper carriage aseaeve at the new columnar position. For this purpose an abutment arm 150 is hung from a key-board cross-shaft 200 so that its lower end will stand in the path of a roller stud 128 on the bar 128 and block the rise of the latter' as illustrated in Fig. 3 Now the slide bar 115, which is operated by the Repeat lever arm 6, is formed with an upstanding finger 115 which extends in front of a stud 150 on said arm 150, and the lever arm 6 is given a special formation so that it may partake of excess movement, that is to say movement beyond that required to put-the obstructing shelf 121 into the path of the stud 6230*. Referring to Figs. 6 and 2*, it will be seen that the upper terminal edge of said arm is of an inverted V-shape. In case of the carriage shift involving the riding of a roller upon the said lever arm, that roller will ride over and beyond the apex of this V-shaped portion of said arm so as to give the latter the excess movement, which is of course transmitted to the slide bar 115. This movement is such as to cause the upstanding finger 115 of said slide bar to operate upon the stud 150 and bring the arm 150 rearward to the position shown in Fig. 3. This removes the lower end of the arm from over the roller stud 128 so that the vertical bar 128 may thereupon rise and close the motor clutch.
In Fig. 2 three different positions of a carriage roller over the lever arm 6 are indicated by circles numbered respectively, 1, 2, and 3. The No. 1 circle represents the roller at the apex of the V. It does not rest there but having depressed the arm to the maximum extent, with the effect above described, moves on, and may come to rest in either of the other two positions indicated. At the No. 2 position it will hold down the arm sufficiently to keep the shelf 121 in the path of the stud 630 Thiswouldbe the case with the carriage in the first, second or third columnar position of the example hereinbefore explained. It will be recalled that in the fourth position of the carriage the repeat devices do not remain set. Here the roller would occupy the No. 3 position, beyond the V, and so not be depressing the lever arm.
The said blocking-arm 150 also functions as one of a pair of jaws or detents such as illustrated in the Kilpatrick Patent No. 928,981 and there designated 6 and 6 The companion jaw detent is here designated 152, being connected with the other jaw by a spring 153 so that the two will function the same as in said Kilpatrick patent. However, in view of the fact that the jaw 150 is given such different formation in the present instance as to enable it to flmction also as a block against the rise of the vertical bar 128, it is necessary to' provide for its being normally restrained so as to permit of the stud 128 entering between the two jaws ward extension with a downwardly inclined cam finger 150 and the before-mentioned stud 127 on the lever 127 is adapted, when that lever is in normal position with its rear arm lowered, to bear upon the upper edge of said cam finger and constrain the arm 150 to assume a rearward position as illustrated in Fig. 3. This removes its lower edge from above the stud 128 and properly positions its front edge with relation to the rear edge of the lower'portion of the companion arm 152 to present a flaring mouth to the stud 128' such as that supplied by the edges e and e in the Kilpatrick construction. It will, of course, be understood that with the elevation of the rear arm of the lever 127 attendant upon depression, of the touch bar, the arm 150 will be released fromrestraint so that it may fully close upon the stud 128 The condition here referred to is illustrated in Fig. 2 which corres onds in this respect with Fig. 2 of said I ilpatrick patent. It will further be understood that here as there, the formation of the detents or jaws is such that when the full-stroke sector stud 311 operates upon the vertical bar 128, the jaws will yield and permit the sltlud 128 to pass downward from between t em.
Hammer block connections.
1909, is followed. Thus'printing is pre-- vented by early release of hammers so that they are deprived of percussive function.
I have before pointed out that the printing mechanism of the machine is subdivided into as many as three sections. The printing mechanism proper is that long familiar in Burroughs adding machines comprising a gang of hammers 715 and hammer driving levers 716 and latches 717 which normally restrain the hammers. The splitting or subdividing is done in the usual way by omitting over-lapping tails between latches, and in the present instance the split is apermanent one. same character as the couplings shown in the Kilpatrick Patent 1,152,517 (and the Vincent 1,166,096 of December 28, 1915) are employed for purposes of the so-called hammer blocking. Then the first or date section of the printing mechanism is itself sub-divided, in soy far as concerns cotiperative tripping action between the first and second latches, inasmuch as there should of However, certain devices of the course be no cipher printed between a month abbreviation and a day date when the latter has but a single numeral. Therefore the first latch 717 which controls the hammer.
for printing the month abbreviation does not have a tail over-lapping the next adjacent latch which controls the hammer for printing a tens numeral of a day date. However, for purposes of hammer blocking these two latches are provided with coupling devices so that a preliminary tripping of the middle one of the -three latches of this section of the printing mechanism will be accompanied by a tripping of the other two, it being observed that the middle latch has a tail over-lapping the third latch, as shown in Fig. 4. There is applied to this middle latch a pitman 717 like that designated by this same numeral in said Kilpatrick patent, and there is a catch 717 pivoted upon this pitman, which corresponds with the catch designated by the same nu meral in said patent, said catch being normally upheld by a spring 717. In the present instance the catch has a lateral stud 717 (Fig. 4 which, when the catch is depressed, will take a position in front of the latterly turned end of a pitman 717 that is pivotally connected at its forward end to the first latch 717.
The catch 717 has a shoulder a (Fig. 1 on its underside which is normally above the path of movement of the cross bar 160 of a bail which is vibrated in every operation of the machine. hen the catch is depressed (through connections presently to be described extending from the hammer block lever arm 7) the said shoulder is brought into the path of said cross-bar, so that at the outset of the operation of the machine the pitman 717 will the drawn rearward. and with it the pitman 717? and so the three latches of this section of the printing mechanism will be tripped and their hammers released and therebyideprived of percussive function.
I have heretofore mentioned that the second section of the printing mechanism has five sets of printing devices which, of course, means that there are here five hammers to be controlled. The latch controlling the first of these hammers has a pitman similar in all respects to that which is applied to the middle latch of the first-described section, and likewise a catch of the same sort, and furthermore this catch is adapted, when depressed, to be operated upon by the same bail cross-bar already described. The eifect will be, of course, to trip all of the latches of the second section of the printing mechanism and deprive their hammers of percussive function so that printing is prevented. The remaining, or amount printing section of the printing mechanism, similarly has a pitman and
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650759A (en) * 1949-12-23 1953-09-01 Underwood Corp Accounting machine having relatively adjustable paper and control carriages
US2927728A (en) * 1960-03-08 Convertible function control means for accounting machines
DE977350C (en) * 1949-04-07 1966-01-13 Burroughs Corp Switchable and interchangeable control bridge for booking machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927728A (en) * 1960-03-08 Convertible function control means for accounting machines
DE977350C (en) * 1949-04-07 1966-01-13 Burroughs Corp Switchable and interchangeable control bridge for booking machines
US2650759A (en) * 1949-12-23 1953-09-01 Underwood Corp Accounting machine having relatively adjustable paper and control carriages

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