US2398395A - Combined typewriting and comput - Google Patents

Description

April 16, 1946.

H. L. PlTMAN COMBINED TYPEWRITING AND COMPUTING MACHINE Filed June 30, 1942 6 Sheets-Sheet l :CECC-HCC: wl-v2.2.2.;

INVENTOR 'Hf/WW P//VA/v ATTORNEY .April 16, 1946. H. L. PITMAN 2,398,395

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed June 50, 1942 6 Sheets-Sheet 2 INVENTOR BY a ATTORNEY April 16, 1945- H. l.. P11-MAN 2,398,395

\ COMBINED TYPEWRITING AND COMPUTING MACHINE Filed June 5Q, 1942 6 Sheets-Sheet 3 u INVENTQR HE/V/PV A. p//VA/V ATTORNEY y April 16, 1946. H. L. PITMAN COMBINED TYPEWRITING AND COMPUTING MACHINE Filed June 30, 1942 16, Sheets-.Sheet 4 y INVENTOR HENRY P/TMA/V ATTORNEY April 16, 1.946. H. L. PITMAN 2,398,395

COMBINED TYPEWRITING AND COMPUTING MACHINE H. L. PrrMAN COMBINED TYPEWRITING AND COMPUTING MACHINE .April 1 6, 1946.

Filed June 30, 1942 6 Sheets-Sheet 6 fsm Patented Apr. 16, 1946 2,398,395 COMBINED TYPEWRITI'NG AND COMPUT- INGLIACHINE Henry L. Pitman, Hartford. Conn., signor to Underwood Corporation. a corporation o! Dela- Application June 30, 1942, Serial No. 449.049

(ci. zas-so) 13 Claims.

This invention relates to combined typewriting and computing machines of the kind exemplified in my Patent No. 2,192,3655, dated March 5, 1940. In its more particular aspects, the invention relates to type-action and case-shift mechanism and operation thereof under control of a totalizer ing the selected` blades through `the carriagee operated denominational Jacks, and the improveand a typing carriage to print positive totals and overdraft totals automatically.

In such machines, the amount-typing operations of numeral type-actions index the amount by setting digit pins in denominational orders which are selected by'seriatim operation of denominational jacks by the carriage. Following the indexing, the machine is cycled and mechanism is thereby operated, according to the values of the set digit pins, to enter the amount in a totalzer comprising a 'set of accumulating wheels.

For a total printing, numeral agents and an extra case-shift agent. the agents being inthe form of a set or nest of transverse blades, are selectable under control of -amachine-reading of a total in the accumulating wheels. The selected blades are operable seriatim in denominational order to cause connection of corresponding numeral type-actions and, possibly, a case-shift action to a power-drive for operation by the latter. The'seriatim operation of the blades is effected through seriatim operation of the aforesaid denominational jacks as the carriage letter-feeds at operation of the type-actions.

Heretofore, the operation of the blades by the denominational Jacks has been translated by mechanical connections into connection of the type-actions and case-shift-action to the powerdrive, as exemplified in my aforesaid patent.

Owing to the small extent of a letter-space step, usually one-tenth of an inch, the carriage, in one step, can scarcely release ya. jack and a thereby operated blade and permit these to bef come restored before depressing the next jack and operating its blade. Hence, it has been difficult, with the aforesaid mechanical connections operated by the blades at operation of the jacks, to obtain such distinctly seriatim operation of the type-actions as will conduce to avoiding interferences of parts and other disadvantages which i arise as where any one type-action operation overlaps the next or previous one.

An object of the invention is to provide improvements whereby these difficulties are overcome. In carrying this out, there may be rements may be made in means whereby operation of the blades results in properly timed connection of the type-actions Jor case-shift action to the power-drive. Preferably, in carrying this out, electromagnet means are employed and operate under control of the blades to connect the typeaction or case-shift action to the power-drive, and proper timing is obtainable by carriage control of the time 0r instant of energization of the magnet.

A further object is to provide an improved type-action system that is simple, inexpensive, reliable in operation, and consists of few parts that take up little room so that the typing mechanism is open and accessible for inspection and servicing, and leaves room for the installation of `contact devices for the offset electromagnet means.

A feature of the improved type-action system is in provision for conditioning the "0 and the 9" type-actions so that either of these is operable in part, that is, without printing, for indexing and for advancing the carriage automatically from a starting or highest denominational posi- A tion to the position where the first significant figure of a positive total or overdraft total is to be printed. The 0 type action is partly usable for this purpose in the case of a positive total where the highest accumulating wheel and one or more lower wheels may register insigniilcant zeros. Similarly, in the case of an overdraft total, the 9 type-action may be partly used in correspondence to those Wheels that register insignificant nines.

Other features of the invention relate to restoring the,0" and "9 type-action in response to tained the aforesaid blades, the means for sey lecting them under total-reading control of the accumulating wheels, and the means for operatthe operation of a type-action for the first significant figure of a total so that a 0 or 9 may be typed after the first significant ligure.

In the case of an overdraft, the accumulating wheels register the complement of the true overdraft and the type-actions are selected according to the complement. The type-actions, however, have upper-case numeral types which are the complements of their lower-case types; and if the wheels register an overdraft, the aforesaid case-shift bladeis automatically caused initially to vbe operated to effect the case shift preparatory to actually typing the true overdraft. The operation of the case-shift mechanism under control of the case-shift blade causes the 9 type-action t be conditioned for partial operation, that is, operation without printing, and then to be op- This result of a case-shift operation, however, must not occur if the case-shift mechanism is operated aside from total printing and merely for upper-case typing, and the invention, therefore, provides a case-shift mechanism organized to meet these conditions` Other objects, features, and advantages will hereinafter appear.

In the drawings:

Figure 1 is a cross sectional side elevation of a combined typewriting and computing machine embodying the invention;

Figure 2 is a front elevation of parts of the type-action system and case-shift action;

Figure 3 is a perspective of the 0 type action and associated mechanism and includes a showing of part of another numeral type-action;

Figure 4 is a perspective of the 9 type action, the escapement mechanism, and part of the caseshift type-action;

Figure 5 is a side elevation, partly in section, of parts of the case-shift mechanism;

Figure 6 is a side elevation, partly in section, of the 9 type action, the case shift action, and associate mechanisms;

Figure 7 is a front elevation of parts of the case-shift mechanism;

Figure 8 is a rear view perspective of the escapement mechanism and its operative connections to a circuit controlling switch;

Figure 9 is a rear view perspective of the escapement and switch in operated positions;

Y Figure 10 is a circuit diagram;

Figure 11 is a perspective of the contact mechanism with parts shown broken away and sectioned to bring out details;

Figure 12 is a partly sectioned rear elevation of the magnets and mounting structure; and

Figure 13 is a front elevation of the contact mechanism.

A typewriter T surmounts a computing base B, Fig. 1. A work-sheet platen is journaled in a carriage C movable upon front and rear carriage rails 22, 23 supported by the typewriter frame F.

Time actions Type bars 24 are operable to print at a common printing point and are pivoted at 25 in a type bar segment 26 which may be case-shiftabie, as later described, each type bar having lower and upper case types 21. A cross member 30 supported within frame F has a series of slots 3l and a transverse fulcrum rod 32. A bank of numeral keys 33 and other banks of alphabet and character keys 34 are on key levers 35 received in corresponding slots 3| of member 30 and fulcrumed on rod 32. Associated with each key lever 35, and also fulcrumed on said rod 32, there is a sublever 36 which may be received in the same slot 3| with Said key lever. Each sub-lever 33 for a numeral type-action has a downwardly extending operating arm 31, a forwardly extending pin setting arm 33, and an upwardly extending typebar actuating arm 39. The sub-lever 33 for any other than a numeral type-action need not have the pin setting arm 33, but will have the arms 31, 39, as represented by the rst sub-lever 33 from the left in Fig. 3. 'I'he horizontal spread of the system of key levers and sub-levers 36 is more than the spread of the arcuate system of type bars 24. As represented at Fig. 2, showing only the right half portions of the system, the

2,398,395 erated to index 9" and letter feed the carriage.

left half portions being similar, the opstanding arms 33 of sub-levers 33 are at graded lengths from the sub-lever fulcrum 32, and the upper portions of said arms 33 are made to converge, as by graded bends 4l, so that the upper ends of said arms 33 have substantially the same arcuate array as arms 4I of the type bars 24, each type bar arm 4| being connected to its sub-lever by a link 42. At the case shifts of the type bar system, the links 42 may swing freely at their points of attachment to the sub-levers 33 and type bar arms 4l.

The operating arm 31 of each sub-lever 33 has pivoted thereto at 43 a draw link 44 to which is pivoted a toothed dog 43. The draw links 44 have substantially uniform extents of type-action driving movements, and the type bar links 42 also have uniform extents of movements. The lengths of the sub-lever arms 31 from fulcrum 32 to the draw link pivots 43 vary, Fig. 2, in proportion to the lengths of the sub-lever arms 33 from fulcrum y 32 to links 42. A iiuted universal snatch roll 41 is journaled within the typewriter frame F, A power drive, not shown, rotates snatch roll 41 counterclockwise, Fig. 1, continuously. When a draw link 44 is lifted and its dog 43 engaged with snatch roll 41, the latter initially rotates said dog clockwise to a stop 49 on the draw link and then the draw link is driven rearwardly to turn its sub-lever 33 counterclockwise about fulcrum 32 to swing its type bar 24 toward the platen 20 in a printing stroke. A cam edge 53, Fig. 6, of the draw link 44 encounters a knock-oil? screw 5I so that the draw link becomes disengaged from snatch roll 41 at a suitable instant before the type bar strikes the platen, the printing stroke being completed by momentum of the type action, A bar 48, supported in the framework, presents a knock-off screwv Si for each type-action. A downwardly and forwardly pulling spring 52, attached to the draw link 44, returns the typeaction to normal position in which draw link 44 rests upon a cross bar 53 fixed within the frame F. The normal positions of sub-levers 36 are determined by abutment as at 54 with cross member 30. In their normal positions, the type bars 24 lie against an arcuate rest 55 supported within the frame F.

Each key lever 35 has pivoted thereto a pendent dog 51, Fig. 1, having a laterally bent lug 53. A spring 59 urges dog 31 counterclockwise so that the dog normally abuts a stop pin 60 on the key lever, Upon depression of a key lever 35, its dog lug 58 engages and depresses a lever arm 32 of the corresponding draw link 44 for lifting the latter about pivot 43 and engaging the dog 43 with snatch roll 41 for resulting printing stroke of the type-action, in which strokevthe draw link lever arm 62 may leave the lug 58. Should the key lever 35 be kept down, the type action may nevertheless return fully to normal position because the key lever dog 51 is turnable clockwise, Fig. 1, to yield to the forward return of the draw link lever arm 32 to normal position.

A comb bar 63 fixed within the framework laterally spaces the draw link lever arms 52, and a comb bar 34 fixed to cross bar 53 laterally spaces and guides the draw-links 44, land its top edge is a rest for the draw-link dogs 43, A comb plate 65 fixed within the framework laterally spaces the key levers 35 and limits the upward movement of the latter. Restoring springs 31 for the key levers 35 are seated on adjusting screws 63 in a bar 33 fixed within the framework.

Computing mechanism A plurality of totalizers, each comprising a se of accumulating wheels or orderunts 1|. Fig. 1. may be distributed laterally in the computing base B. For each totalizer there is a set of pin bars 12 each having a row of depressible digit pinsv 18 and a drive rack 1l meshing with a companion idler 18. The pin bars are normally positioned by `spring devices 18 against a comb guide 11 so that their pins 18 are out of line with corresponding pin setting bars 18, each of which is operatively connected to a rock shaft 19.

For each computing zone of its travel the typewriter carriage C carries a column unit 89 adapted to depress seriati'm a series of denominational Jacks 8|. Each Jack 8l, when depressed, operates through connections 82 to move a corresponding master rack 83 in the computing base endwise. 12 is a set of distributive racks 84, each connected to a corresponding master` rack 83 by a rockable cross blade 85. Each set of distributive racks has a set of couplers 89 liftable by a plate 81 into operative alignment with the pin bars 12. Upon entry of the carriage in a computing zone, the column unit 89 selects and depresses one of three cam plates 88 to raise the corresponding coupler lifting plate 81 by means of operative connections, not shown, from said cam plate 88 to lifting plate 81, so that subsequent traverse of the jacks 8| by the column unit 89, for a given zone, will advance the pin bars 12 seriatim to pin setting positions under the pin setting bars 18, The seria-tim advance of the pin bars is effected consonantly with the letter feeding movements of the carriage as the numeral type actions are actuated, under control of their key levers 35, to type the amount to be indexed. The letter feed mechanism for the carriage will be described later.

The pin setting arm 38 of each numeral type action sub-lever has a pendent rod 89 so that when said type action is operated to print its digit, the rod engages a crank 99 on the` correspOnding rock shaft 19 to rock the latter to depress the corresponding pin setting bar 18 and set the corresponding digit pin 13 in the pin bar 12 that stands advanced to pin setting position. The pin setting bars 18, rock shafts 19, and cranks 99 constitute an indexing mechanism by which the amount represented by the digits being typed is set up or indexed in the set of pin bars 12. The lengths of the sub-lever pin-setting arms 38 vary in proportion to the draw link arms 31 so that the pendent rods 89, 'guided at |99, have substantially uniform vertical strokes. The rods 89 are mainly vertical, and, therefore, some may have different horizontal extensions 89, Figs. 3, 4, at which they are pivotally connected to the pin-setting arms 38.

In the letter-feed step of the carriage, which attends the typing of thelast digit of an amount. the column unit 89 overrides and rocks a cycle trip lever 9|, partly shown, Fig. 1, on the framework. Said lever 9| in turn rocks a shaft 92, in the computing base, counterclockwise through a connection diagrammatically represented by the dot-and-dash line 93, Fig. 1. This retracts a latch arm 94 from a stud 95 fixed to a disc 96, and it results that the disc, spring urged, rotates slightly clockwise about a cycling shaft 91 .iournaled in the computing base. This slight rotation of disc 96 closes a clutch, not shown, to couple shaft 91 to the power drive, not shown, for a resulting revolution of said shaft. Just before the end of Associated with each set of pin bars this revolution which also turns the disc 98, the stud Il will again encounter the restored latch arm 88 so that the disc 88 is arrested while the shaft 91 rotates slightly farther relatively to the arrested disc to cause the clutch to reopen to limit the rotation of said shaft 81 to one revolution or cycle. These power drive and control features may be substantially as described in my Patent No. 2,160,487, dated May 39, 1939.

By 4means of an'operative connection. diagram'- matically represented by the dot-and-dash line 99, Fig. l, the cycle of revolution oi' shaft 91 rcciprocates a general operator cross bar 98 in the computing base. .In its advance stroke, cross bar 98 cooperates with the set digit pins 18 to advance the pin bars 12 to extents corresponding to' the pins which were set. Meana, not shown, cooperate with'the cycling of shaft 81 to engage the order units 1i either with the racks 14 or idlers 15 as determined by operation of state control mechanism, not shown, prior to the cycling of the machine; said means also serve to disengage the order units 1| from the racks 14 or idlers 15 before the general operator cross bar 98, in its return stroke, restores the pin bars 12. The spring devices 19 restore the pin bars 12 slightly beyond the returned general operator cross bar98 so that the latter in its normal position does not obstruct the seriatim advance of the pin bars to pin setting positions.

Total printing control A total key |99 has a key lever |9|, of which there is shown, Fig. l, the front key end and thc rear end underlying a reed |92 vertically movable in the framework; the lever |9| is fulcrumed on a rod in the framework intermediate said ends. The raising of reed |92 from its normal position by operation of the total key lever |9| works through anoperative connection, diagrammati cally represented at |93, to raise and thereby dis'- engage a carriage feed rack |94 from the escapement mechanism, later described, for resulting advanceof the carriage toward the total printing zone. A carriage arresting stop |95, partly shown, Fig. 1, is operatively connected to a fork |92? of reed |92 and is engageable by a counterstop on the column unit 89, when lifted by reed |92, to arrest the carriage in such position that, the total key being released and reed |92 and stop |95 dropping back to normal position with attendant reengagement of the letter feed rack with the escapement, the carriage settles at the highest denomination position of the total printing zone.

The elevation of reed |92 by depression of the total key has also thrust rearwardly a rod |98, operatively connected to the cam plates 88 at |91. so that said cam plates are tilted to the dotted line positions, Fig. 1, where edges |91a of said cam plates 88 overlie and thereby become operatively connected to arms |98 extending rearwardly from three jacks |99disposed to the right of the denomination jacks 8|. Each cam plate 88 and its corresponding Jack 99 represents one of the three totalizers which may be provided in the computing base.- Each jack |99 'has an operative connection -to a corresponding cross blade ||9, the operative connection being similar to the parts 82, 83 associated with the denomination jacks 8|.

The column unit ,89 for thev total printing zone will have a tappet to depress that one of the cam plates 88, the' latter being in the dotted line positions, corresponding to the totalizer from which it is desired to print the total at said zone. This depression of a cam plate 88 occurs just being to the highest order unit 1| at which it settles following operation of the total key and is attended by rocking of the corresponding cross blade counterclockwise about its lower edge. Such rocking of any cross blade ||0 operates through a connection diagrammatically represented at ||2, Fig. 1, to rock a shaft ||3 in the computing base clockwise and therebyI retract a latch arm ||4 on said shaft from stud III of an arm ||6 nxed to a rock shaft I I1 journaled in the computing base.

Each order unit 1| has a disc having notches that form ten digit stops IIB, partly shown in Fig. 1. For each set of units 1| there may be a set of feelers supported for endwise movements. Said feelers |20 are spring urged toward the order units and are normally held in retracted positions by a cross bar |2| supported and guided, by means not shown, for horizontal movements for receding from and for restoring said feelers |20. Said feeler bar |2| has operative connection, diagrammatically represented at |22, to rock shaft ill. Upon the retraction of latch arm ||4 at advance of the carriage to the total printing zone, as a result of operation of total key |00, a spring |23 turns shaft ||1 counterclockwise to a stop ||8 so that, through connection |22, bar |2| is moved forwardly to recede from the feelers |20. Each feeler |20 has pivoted thereto an arm |25 spring-urged against a stop |21 on the feeler.

Associated with each set of feelers |2| is a set of interponent plates |28 supported and guided for vertical movements. Each set of interponents 28 is normally upheld by a cross rod |29 which in turn is upheld by means, including a latch device, not shown, controlled by a corre spending carriage-controlled cam plate 88 and its associated cross blade ||0. Depression of a cam plate 88 and attendant rocking of its cross blade ||0 releases said upholding means, including said latch device, and causes the corresponding set of interponents |28 to drop by gravity so that cam-points |30 of said interponents |28 each settle between two teeth of the corresponding pin bar rack 14. Such dropping of a set of interponents |28 also releases the corresponding set of feelers |20 for movement toward the order units 1| in that rollers |3| on the feeler arms may pass over upper edges |32 of the dropped interponents |28. The other sets of interponents |28, remaining in upheld position, obstruct, by their rear edges, the neighboring rollers |3| so that the corresponding sets of feelers |20 cannot advance at recession 0f the bar |2| whichoccurs at carriage operation of .a cam plate 88 while in its dotted line position, Fig. 1.

The released feelers |20 each settle against whichever digit stop ||9 stands presented by the corresponding order unit 1|, and thereby a tab |33 on each feeler arm |25 is positioned under and thereby selects one of a series of eleven cross blades |34, |35 supported bymeans, not shown, for vertical edgewise movements. There are ten of the blades |34 for the positions, from 0 to 9, of the order units. The eleventh blade |35 corresponds to the 9 position of the highest order unit 1| and assumes this position when the totalizer registers a credit balance or overdraft and the highest order unit presents a stop ||9 to arrest the feeler |20 with its tab |33 under said 'credit balance blade |35. If a set of order units registers a debit, that is, positive amount, the highest order unit stands at 0 since the number of order umts, say, nine units, may be fore the carriage reaches the position, correspondlarge enough so. that a positive amount does not run to the highest order unit.

In summary. it may be stated that following operation of the total key |00 the carriage advances to the total printing zone, as defined by a column unit 80, and the carriage -wil1 settle at the position corresponding to the highest order unit 1|. The selected set of feelers |20 also will have been released and become positioned with their tabs |33 under blades |34, |35 corresponding to the digits of the amount standing registered in the order units 1|. As the carriage settles at this highest position, the column unit depresses the highest denomination Jack 8| and there is attendant slight forward advance of the highest denomination pin bar 12 to bring its pins 13 under the pin setting bars 18. This slight advance of pin bar 12 acts against the cam |30 of the corresponding dropped interponent |28 and thereby lifts the latter. As the interponent |28 is lifted, its upper edge |32 engages the roller |3| of the companion feeler arm |25 and turns said arm clockwise. to lift its tab |33 to lift the blade |34, or |35, under which said tab is positioned.

The above description of the mechanism whereby blades |34,` |35 are capable of being selectively lifted under control of the order units 1| and carriage, subject to prior operation of total key |00, is believed sufcient for an understanding of the present invention, and further details may be along the lines shown in my Patent No. 2,192,365, dated March 5, 1940, and in my copending application Serial No. 337,380, flied May 27, 1940, now Patent No. 2,372,681, issued April 3, 1945, to which reference may be had.

Electro-magnet control of typewriter for total printing Each blade |34, |35 has a tongue |31 to en- I gage an insulator button |38, Figs. 4, 6, 1l, secured to a lower contact blade |39 to which is secured a contact point |40, Fig. 13. An upper contact blade |4| has a contact point |42. One of the contact points |40, |42 may be convexsurfaced and the other may be flat-surfaced for wiping action. The several pairs of upper and lower contact blades |39, |4| may be spaced laterally apart, as in Figs. 11, 13, and the tongues |31, of course, have similar lateral spacing. Each lower contact blade |39 is clamped between upper and lower insulator bars 43, |44. The lower bar |44 may have cross slots |45 tting the width and thickness of the lower blades |39, each of which may be secured against endwise displacement by a dowel |46 in the lower insulator bar |44. The upper Contact blades |4| are integral with a conducting strip |41 which may rest'upon the upper insulator bar |43 which in turn rests upon the lower contact blades |39. The lower insulator bar |44 is seated upon arms |49 of angular brackets |50 of which there may be three secured by screws |5| to the cross bar 63. Screws |52 secure the upper and lower insulator bars |43, |44 to said arms, the strip |41 having a. clearance |53 so that contact with the grounded middle screw |52 is avoided. Intermediate screws |51, each disposed between two neighboring pairs of contact blades |39, |4|, pass through and clamp together the strip 41 and insulator bars |43, |44 by clamp nuts |54. Cross bar 63 is secured to ears |55 of two side brackets |58, Fig. 11, each secured to the inner side walls of the typewriter frame F by screws |58 and dowels |58. A cross bar |60 secured to lateral .tabs |66* of brackets |68 is perforated to receive and guide the pin setter rods 86 of the numeral type actions. made of thin spring material such as phosphobronze of a thickness, say, of .010 of an inch. Although the insulator buttons |36 are at different distances from the insulator bars |43, |44, each one of said contact blades is freely flexible, by little pressure against the buttons |36, to close its normally open contacts when the correspond- Alng blade |34 0r |66 is lifted. A11 the blades |34,

|36 have equal extents of lift oi', say, about eight hundredths of an inch and may immediately engage vtheir insulator buttons |36. This extent of lift of a blade may be more than enough to close the contacts so that the latter, when closed, are

given a wiping movement as the contact blades are flexed further -by the excess lift of a blade For each of the ten numeral-type-action drawlinks 44, there is an electro-magnet M, and for case shift draw-link |6|, to be referred to later, there is a magnet SH, FigsQl, 3, 4, 6, 12. Each of said magnets and a U-shaped frame |62 `therefor are attached in a row to the underside of a channel bar |63 by screws |64 threaded into the magnet core. A cover plate |66 is secured to channel bar |63 by screws |61 threaded into studsv |66 forming heads of three of the magnet screws |64, Said plate |66 has turned-down ends |66 secured to the inner side walls of the typewriter frame F by screws |66. A slot at each end of the cover plate fits a stud`|16 in frame F to cooperate with screw |66 to keep the magnets and their supporting bar structure |63, |66 from turning.

Each magnet has an armature plate |1| having a fulcrum bearing against a lower edge` |12 of the rear leg of the U-shaped frame |62. From said edge |12 extends a tongue |13 which loosely fits into a slot in the armature plate |1| to retain the latter transversely. A spring |14, attached to frame |62, upholds armature plate |1| against said edge |12 and-normally keeps said armature plate separated from the bottom end of the magnet core |11 as an arm |16 of the armature plate |1| stops against the back of frame |62. An upturned tongue |16 at the forward end of the armature plate |1| underlies a land |86 at the rear end of the companion draw link 44 or 6|.

When a magnet is excited, through closing its circuit as described later, it attracts its armature plate |1| and turns the latter about edge |12 to lift the draw-link, 44 or |6|, to engage the drawlink dog 46 with the rotating snatch roll 41 for resulting actuation of the type action orof the case shift mechanism. The front leg of the U- shaped frame |62 protects the magnet coil and may form part of the magnetic circuit. v

Case shiftv mechanism A case shift key lever |83, Figs. 4, 5, 6, may'vbe fixed to a', rock shaft |64 journaled in the typewriter frame brackets |56, Fig. l. Anarm |86, fixed to said rock shaft |64, has a pin-and-slot and spring connection |86 to aA connecting-'rod |61 pivotally connected at |68 to aslide |66 hav ing slots |66 slidably fitting studs l6| in the typewriter frame F. An eccentric |62, Figs. 5, '1, rotatable about the axis of snatch roll 41 has pivoted thereto at |61 a clutch dog |66 urged, counterclockwise, Fig. 5, by a spring, not shown, toward the snatch roll. Dog |63 is normally held disengaged from snatch roll 41 by resting, as at Fig. 5, against a front .stop |94 on slide |66.

The contact blades |36, |4| are Upon depressing the case shift key lever |63, its shaft is rocked` counterclockwise and works through arm |86 and connecting-rod |81 to move slide |66 on studs |6| to retract stop |64 from dog |63, which consequently is spring-pressed into engagement with snatch rollv 41, whereby the eccentric |62 is rotated counterclockwise, Fig. 5. Key lever |63 iskept depressed and hence the slide |86 is kept in position so that a second stop |66 of the slide intercepts dg |63 and thereby causes its disengagement from snatch roll 41 in order to stop the eccentric |62 after the latter has turned about one-half of a revolution. Upon releasing the shift key lever |63, a spring |86, attached to slide |66, restores the latter, together with the rest of the key lever train, thereby withdrawing the secondary stop |66 from dog |63 to allow the latter to again engage with snatch roll 41, whereby the eccentric |62 is turned counterclockwise to completeits revolution, the end of the revolution being determined as primary stop |64 of the restored 'slide |66 intercepts dog |63 and causes its disengagement from snatch roll A strap |66 journaled, as by ball bearings, not shown, upon eccentric |62 is pivotally connected at |66 to a rocker 266 rotatable about the same axis as a rock shaft 26| journaled in the typewriter frame F. Said shaft 26| has fixed thereto side arms 262 pivotally connected to side studs 263 at the lower side corners of a shift frame 265, Fig. 7, to which is attached type bar segment 26, Fig. l. Rollers 266 have raceways in typewriter frame F and in shift frame 265,to further guide the latter at its upper side corners. Rocker 266 may bear loosely on shaft 26| and has abutment screws 264 bearing on opposite sides of one of the studs 263 to connect operatively said rocker 266 to shift-frame 265. 1 It will be seen now that the first half revolution of eccentric 62, resulting from depression of case shift key lever |63, operates through strap |66 and rocker arm 266 to lower shift-frame 266 and type-bar-segment 26 to upper case position; and upon release of the case-shift key-lever |83, the resulting completion of revolution of eccentric |62 raises and restores frame 265 and type-bar-segment 26 to normal or lower` case position. Stops 2| Fig. '7, may

be provided to engage and arrest the frame 265,

said stops augmenting the case-shift limiting action of cam |62 to assure more accurate arrest of said frame, its type bar segment 26 and type bars 24 in upper and lower case positions. The

strap |66, rocker 266 and associated connec-V tions to the frame 265 may have inherent yield sufficient to allow stops 2|| to determine ,the exact case-shift positions. Springs 2| Il counterbalance the vweight of frame 265 audits attachments.

A lever 266, Figs. 4, 5, 6, fulcrumed on rod 32, is located in its slot 3| of cross member 36. Said lever 206 normally abuts cross member 36, as at 54, and has pivoted at 261 the case shift draw link |6|. Like the draw links 44, the case shift draw link |6| has a toothed dog 46 and also has a restoring spring 62 and normally rests on cross bar 53, within the comb bar 64. A roll 266 on an arm of said lever 266 is operable against a cam edge 2|6 of an l'arm of case shift key lever 63.

Upon exciting the case shift magnet SH, as will be explained later, its armature plate |1| is attracted to lift the case shift draw link |6| to engage dog 46 thereof with snatch roll 41. resulting rearward stroke of draw link |6| rocks counterclockwise the lever 266 which, in turn.

The-

through the roll 288 and cam edge 2|0, rocks the case shift key lever |83 counterclockwise to operated position.

A rod 2|2 is pivoted at 2|3 to lever 285 and has its other end 2|4 slidably forked over a rock shaft 2|5 journaled in frame F. A latch lever fulcrumed on shaft 2| 5 comprises arms 2|8, 2l1 and has pivoted thereto at 2|8 a thrust rod 2|9 guided in and projecting below a bracket 220 fixed to. ltypewriter frame F. A spring 222 anchored to bracket 220 urges thrust rod 2|9 downwardly to turn clockwise the latch lever 2|8,

2|1 whose edge 223, however, normally bears against the underside of a square stud 224 fixed to rod 2|2. When the snatch-roll-driven stroke of said draw link |6| has rocked lever 206 counterclockwise to move the case shift key lever |83 to operated position, the rod 2|2 has shifted to permit latch lever 2|8, 2|1 to be rocked clockwise by spring 222 to position in which a latching recess 225 of arm 2|8 interlocks with stud 224 to keep the lever 206, and hence the case shift key lever |83, in operated position, until released as will be explained later.

In its rearward stroke, the case shift draw link |6| may encounter its knock-ofi.' screw 5| to become disconnected from snatch roll 41' just before lever 206 and case shift key lever |83 reach their fully operated positions which they may attain by the momentum of the parts.

Due to this movement of the case shift lever |83 to operated position and to the maintenance of said position by means of latch lever 2l6, 2|1, the eccentric |92 will have received its first half revolution by snatch roll 41 and will then be arrested by stop I 95 of slide |83 which is also maintained in operated position, along with case shift key lever |83, and the type bar segment 26 and type bars 24 will thereby have become lowered to and will be maintained in upper case position until the above-mentioned release is effected.

Letter feed mechanism Feed rack |04 on carriage C engages a pinion 228 ratchet-coupled to an escapement wheel 229 by spring-pressed pawl or pawls 226, Fig. 4, on said wheel. A dog rocker 230, Figs. 1, 4, 7, 8, swingable about pivots 23| includes a holding dog 232 and a stepping dog 233 pivoted on a stud 234 in dog rocker 230. A spring motor 235, on the machine frame, has a draw-band-connection to Vcarriage C and tends to advance the carriage which is normally stopped by engagement of escapement wheel 229 with stepping dog 283 which rests against a stop 231 on dog rocker 230. The escapement wheel 229 and pinion 228 are journaled, and the dog rocker pivots 23| are mounted, in an escapement bracketl 238, partly shown, supported by the machine frame F. A rocker frame comprising a cross bar 239 and upright arms 240 is fulcrumed at its opposite sides on studs 24| in bracket 238. A cross rod 242 spans said arms 240. The letter feed mechanism parts so far described are substantially as in the Underwood standard typewriter, see, for example, the Helmond Patent No. 1,516,922, dated November 25, 1924.

Side arms 243 pivoted to said rocker frame at 244 are integral with a cross piece 245 having a tumed-down ear 246 which, with its attached collar 241, slldably fits a guide rod 248 which is fixed in bracket 238 and cooperates with the ascasos From the cross piece 245 adjustably projects a screw stud 249, Fig. 4, to engage dog rocker 230.

Shift frame 205 has arms 25| which rockably support, by means of pivot studs 250, a frame comprising arms 253 and 254 rigidly connected by a cross bar 255. An upper cross rod 258 may project'through said arms 258, 254 to support pivotally side arms 258 fixed to a curved universal bar 259. Fingers 258l project from side arms 258 and slidably fit openings 251, Fig. 7, in the shift frame 205 to cooperate with the frame 253--258 for supporting the universal bar 258 for engagement and movement by heels 260 of type bars 24, the type bar segment 26 having a recess 26|, Fig. 1, to admit the universal b'ar 259 for engagement by said type bar heels 260. In the normal positions of the parts, the front face 282 of a block 263 fixed to cross piece 245 may bear against cross rod 256 and the front edge of the universal bar 259 may bear against the vertical wall of recess 28| under the urge of a spring 264 attached to a stud, Fig. 4, of cross piece 245, the other end of said spring having attachment, not shown, to frame 205.

The universal bar 259 and its rockable supporting frame 253-256, being supported on shift frame 205, move up and down with the case shifts; but the dog-rocker- actuating frame 243, 245 does not partake of the case shift movements, inthat it is supported on the main frame F. However, said frame 243, 245 is, by means of its face 262 which adjoins rod 256, always in operative connection with universal bar 259 irrethe frame 243, 246 for fore-and-aft movements.

spective of the case shifts, and it will be seen that such operative connection does not interfere with the case shifts.

Escapement switch A switch 265, Figs. 6, 7, 8, 9, provided for a purpose to be described later, has a casing 265b secured to the side of a housing 252 containing cam plates 88 and Jacks 8|, Fig. 1, and secured to the typewriter framework F. Said switch is illustrated dagrammatically, Figs. 8, 9, and may include a snap device, not illustrated, whereby a small inward movement, say, of about one-thousandths of an inch, of a plunger 265 in said casing, closes the switch with a snap and whereby, conversely, release of the plunger results in a similar small outward movement thereof and a snapopening of the switch. A control lever 261 for said plunger may be a resilient strip fastened at its lower end to said casing. A rod 288 loosely fits in the upper end 0f lever 261 and has a sleeve 268a for shoulder engagement with said lever.

Rod 268 links lever 261 to an arm 289 fixed to a rock shaft 210, Figs. 7, 8, 9, Journaled in a bracket 210* fixed to the escapement bracket 238. An arm 21| fixed to shaft 210 is engageeble by an arm 212 of a lever fulcrumed on pivot stud 234 of escapement stepping dog 233 and having an arm 213 bent horizontally for engagement with the edge of said dog 233. Normally, dog 233 stops against stop 231, Fig. 8, of dog rocker 230 and in turn stops a tooth of escapement wheel 229 to hold the carriage in a letter-printing position. In its normal position, Fig. 8, dog 233 bears on arm 213 of the lever which, in turn, bears with its other arm 212 on arm 21| of shaft 210 to hold the latter in position wherein arm 289 and rod 268, with its sleeve 268, press switch lever 251 to keep the switch plunger 265c in closed-switch position. In the usual letter space operation, dog rocker 230 is iirst rocked counterclockwise to the Fig. 9 position to withdraw stepping dog 233 from its engagement with the escapement wheel tooth and interpose the holding dog 232 to hold the escapement wheel and carriage. Urged by its spring 214, the withdrawn dog 233 swings clockwise about stud 234 to a stop 215, partly shown, on the escapement bracket 238 to` position dog 233, Fig. 9, for the next escapement wheel tooth. This clockwise movement of dog 232 is attended by corresponding movement of the train, comprising 213, 212, 21|, 210, 269, and 288, to release switch lever 261 and plunger 265 for consequent automatic snap-opening of switch 265. A spring 216, acting on arm 269, may cooperate to urge said train to switch-opening position. By return rocking of the dog rocker 230, the holding dog 282 is withdrawn from the escapement wheel and the stepping dog 233 is placed before the aforesaid next tooth. In the ensuing step movement of the carriage by its spring motor 235, the escapement wheel 229 is turned clockwiseI Fig. 9, and'rocks dog 233 counterclockwise back to stop 231, Fig. 8, which limits the carriage step. This counterclockwise rocking of dog 233 operates the aforesaid train to operate switch lever 281 -to press the switch plunger 265c so that switch 265 will be closed at the end of the letter feed step of the carriage. The movement of rod 268 derived from dog 233 maybe in excess of the required movement of switch lever 261; this conduces to effecting the closing of the switch at the latter part or end of the carriage step movement.

Switch 285 is also opened and reclosed in correlation with tabulating the carriage. Upon lifting rack |04 from engagement with the escapement pinion 228 to release the carriage for tabulating, said pinion 228 and escapement wheel 229 become free to rotate; and, hence, stepping dog 233, which is in engagement with Wheel 229 and is urged by spring 214, turns clockwise and turns wheel 229 counter-clockwise of Fig. 8 to a checkpawl 211, pivoted on dog rocker 230 and shown in Fig. 4. This clockwise turning of dog 233 causes opening of switch 265. When rack |04 is reengaged with pinion 228 at the end of the carriage tabulating movement, the carriage, under the urge of its spring motor 235, turns pinion 228 and escapement wheel 229 clockwise of Fig. 8, and thereby stepping dog 233 is turned counterclockwise back to stop 231 and causesrecloslng of switch 265 as the carriage settles in its tabulated-to position.

Further, any movement of the carriage C in return direction rotates pinion 228 counterclockwise, Fig. 8, and, coincidentlly, stepping dog 233 is rotated clockwise by spring 214 so that switch 265. is caused to be open during the carriage-return movement. At the end of the carriage-return effort, the carriage is urged again in advance direction by its spring-motor 235, and turns pinion 228 and escapement wheel 229 clockwise, thereby bringing dog 233 back to stop 231, Fig. 8, and coincidentally operating the aforesaid train to reclose switch 265. The switch-opening movement of dog 233 as an incident to carriage-return movement may be stopped by the above-mentioned check-pawl 211 on dog rocker 230, Fig. 4, arresting wheel 229 in its counterclockwise movehighest order unit 1I stands at 0 and one or more of the next lower units may also stand at 0.f' For example. if the total is 70 42, the nine order units correspondingly stand at 0000070 42.

In the section entitled Total printing control," it was explained that depression of the cam plate 88 for said totalizer is effected by the carriage just before the carriage, released for tabulating advance by operation of total key |00, reaches the position of highest denomination at which it finally settles. It was also explained that said depression of cam plate 88 causes release of rock shaft |I1 and release of the feelers I 20, forV said totalizer, which feelers consequently move and settlev in total-reading positions against digit stops ||9 so that their movable tabs |33 stand under-those digit blades |34 that correspond to the digit-registering positions of the order units 1I. The tab |33 of the feeler for the highest unit, which, in the above example, registers 0, is lifted, by means of interponent |28, by the slight advance of the corresponding pin bar 12 occurring as the carriage settles at the highest denomination and depresses the corresponding jack 8|. This lifting of tab |33 lifts the 0" blade |34 to bring the corresponding contact blades |39, I4I together and thereby excite the 0 magnet M for resulting actuation of the "0 type action sublever 36 from which the 0 type bar 24 has become disconnected as will now be described.

The 0 sub-lever 36 comprises two parts 218, 219, Figs. l, 3, both fulcrumed on rod 32. These parts may be received in one corresponding slot 3| of cross member 30. The "0 key lever 35 is also fulcrumed on rod 32, between the parts 218,

219, as is provided for by an offsetting bend 280 in the part 218. A lever 28| pivoted on part 218 at 282 has one arrn having a headed stud 283 which is normally within a slot 284 of the other part 219 whereby these parts are normally coupled for joint movement about fulcrum rod 32. A spring 285, connected between part 218 and lever 28|, urges the latter counterclockwlse to -keep said parts 218, 219 coupled. A link 286 connects the other arm of lever 28| to an arm 281 connected by a yoke 288 to another arm 289 to form a lever 290 loosely fulcrumed on the shaft 2I5 journaled in the framework. Suitable collars, not shown, on shaft 2 I5 may retain lever 290 laterally. A lateral tab 292 of arm 289 has a slot 293 through which passes a control rod 294 extending forwardly from tab 292 to a pivotal connection 295 with a link 296 whose upper end is pivotally supported on the right-hand one of the pivot studs 250, on shift frame 205, 25|, for the rear universal bar frame 253-256. An arm 291 of said frame presents a stud 298 below pivot 250 for engaging a rear edge 299 of link 296. A rod 300, pivotally connected at 30| to control rod 294, depends from the latter through a guide 302, Fig. 1, on the framework and has a roller 303 to abut the top of a rod 304 projecting above a guide 305 'in computing base B. The lower end of rod 304 ment which attends said movement of dog 233. If y check-pawl 211 is omitted, said movement of dog 233 may be checked by stop 215.

If a totalizerv registers a positive total. the

is pivotally connected at 306 to an arm 301 xed to rock shaft I I1.

A spring 308 connected between a lateral ear 309, arm 289, and control rod 294 tends to turn lever 290 clockwise on shaft 2I5 so that rod 300 bears upon the lower rod- 304, and spring 308 tends to move the control rod 294 so that edge 299 of link 296 bears against stud 298 of supporting frame 254--256 for universal bar 259.

It will be seen now that as shaft II1 is released and consequently is rocked counterclock- Wise to stop I I8 by spring |23 preparatory to total bar 12 by means of the printing from a. totalizer, the lower rod 334 and the rod 309 bearing thereon are lifted, and control rod 294 is thereby turned counterclockwise about its pivotal connection 295 with link 296. This rotates the lever 290 counterclockwise about shaft 215 to operate through link 286 to turn the coupling lever 28|, on sub-lever part 218, clockwise to raise stud 283 out of slot 284 of the other sublever part 219, thereby disconnecting said parts 218, 219. The part 218 is connected by link 42 to the type bar 24, and, hence, the described disconnection at 283, 284 operatively disconnects said "0 type bar from the part 219 which remains operable by its draw link 44.

The rock shaft 111 remains in its rocked position against stop 118 until restored, at the end of total printing, by cycling the general operator in the computing base; and, correspondingly, as far as rock shaft 111 is concerned, the coupling 283, 284 remains disconnected. The sub-lever part 219, operable counterclockwise through its draw link 44 by snatch roll 41, is connected at 311 to a link 312 which has a pin-and-slot or one-way driving connection 313 to an arm 314 fixed to a rock shaft 315 journaied in the framework. An arm 316 also xed to shaft 315 has a pin-and-slot connection 311 to a lever arm 318 extending from rocker frame 239, 240 to which is connected the frame 243, 245 which has operative connection to the escapement dog rocker 230.

As the sub-lever part 219 is operated, counterclockwise, through its draw link 44, by snatch roll 41, consequently to the described lifting of the 0 blade -134, the rock shaft 315 is concomitantly rocked counterclockwise through link 312 and, in turn, through the pin-andslot connection 311 the frame 239, 249, Fig. 1, is rocked clockwise to move frame 243, 245 to rock the escapement dog rocker 230 clockwise. As this occurs, the draw link 44 for sub-lever part 219 becomes or has become disconnected from snatch roll 41 by encountering its knock-oir screw 51, and it results that the described train or' parts to the escapement dog rocker 230 is spring restored and said escapement dog rocker 230 is spring returned counterclockwise to normal position. The first or clockwise rocking of escapement dog rocker 230 has released its stepping dog 233 from the escapement wheel 229 for resulting stepping movement of said dog 233, and the second or counterclockwise rocking of said dog rocker 230 has again interposed the stepping dog 233 to the escapement wheel which thereby turns with attendant letter feed step of the carriage.

This letter feed step of the carriage causes the latter to leave the highest jack 8| and depress the jack 8| of the next lower denomination for which the order unit 1| also stands at 0, according to the above example, 0000070 42, and causes the sub-lever part 219 to be again operated by snatch roll 41, without printing 0, thereby causing a further letter feed step of the carriage. And so on, the carriage is advanced step by step, as determined by each order unit 11 that registers an insignificant 0, until the carriage arrives at the denominational position and depresses the jack 81 corresponding to the order unit that registers the first significant "7 in the above example.

Because of the resulting energization of the 7 magnet M, the 7 type action is connected to and operated by snatch roll 41 to print the first digit 7 and index "7 in the corresponding pin indexing rod 89 and pinsetting bar 18. In printing, the "7" type bar 24 engages and moves rearwardly the universal bar 259 and rocks frame 283-289, Fig. 4, clockwise, which moves frame 243, 245 to rock the escapement dog rocker 230 clockwise. The attendant movement of frame 239, 240, 318, and shaft 315, however, will not move link 312, because the oneway driving connection 313 is provided.

As universal bar -259 is moved rearwardly by operation of the '1 type bar 24, the arm 291, 298 of frame 253--256, which is rocked clockwise, rocks the link 296 clockwise, Fig. 3, and thereby draws control rod 294 forwardly to withdraw its upper step 319 from tab 292 of lever 29D and Dermits said tab 292 to fall upon a lower step 320 of said control rod 294 which remains upheld by rods 300, 304. The resulting clockwise rotation of lever 290, movement of link 288, and counterclockwise rotation of lever 281 by springs 285, 998, enter stud 283 into slot 284 again, and thereby the parts 218, 219 of the "0 type action sublever are coupled again so that the "0 type bar 24 is made operative again in order to print "0 upon any subsequent selection and operation of the "0 type action following the typing of the first significant digit 7, in the above example.

The "7 draw link 44 encounters its knock-off 5I and becomes disconnected from snatch roll 41 so that the "7 type action completes its printing stroke by momentum and thereupon returns, with attendant return of universal bar 259 and counterclockwise return of dog rocker 230. At the clock wise and counterclockwise movements of dog rocker 239, at the printing and return strokes of the "7 type action, the escapement dogs 232y 233 function relatively to escapement wheel 229 to effect a letter feed step of the carriage to the next lower denomination for which the order unit 11 Stands at 0, in the above example, and hence determines that the0 type action, whose sublever parts 218, 219 have become recoupled, is operated to print "0 and effect, by substantially joint operation, of universal bar 259 and link 3I2, a letter feed step of the carriage. This step of the carriage may bring a suitable skip dew'ce, not shown but which may be as described in the aforesaid Patent No. 2,192,365, into play so that an additional advance of the carriage automatically occurs to the tens of cents denomination for which the computing pinion registered 4, in the above example, so that now the 4 type action is caused to be operated to print and index "4 and the carriage is letter spaced another step. Thereupon, as will now be clear, the "2 type action is automatically caused to be operated to print and index the last digit "2 of the above example.

In the letter feed step which attends the typing of the last digit, the carriage overrides cycle trip lever 91 for a resulting one revolution cycle of the general operator shaft 91 in the computing base. Said shaft 91 has an operative connection diagrammatically represented at 322, Fig. 1, to the rock shaft |11 to restore the latter clockwise to the position where it becomes held again by latch 114. The restoration of shaft |11 operates through connection |22 and cross bar 121 to restore feelers |20. The restoration of shaft 111 is also attended by dropping of rod 304, thereby permitting the rod 3D0 to also drop and control bar 294 to turn clockwise about pivotal connection 295, under the influence of gravity and oblique spring 308, and then to move rearwardly, under inuence of said spring 308, to bring the upper step 319 under the top of the slot Vin tab 292 of the previously restored lever 290. Until control rod 294 has been thus restored, a shoulder 324 thereof has rested against the front oi tab 292 of previously restored lever 280.

When sub-lever parts 218, 219 are coupled and operated jointly about rod 32, the lever 28|, of course, also turns bodily about rod 32. As will be evident from Fig. l, the pivotal connection 32| of lever 28| to link 286 is so disposed that its movement about rod 32 is merely idle and substantially does not affect the coupling lever 28| or the lever 290.

Operating 9 type action under totalizer control without printing to advance carriage to first significant figure position for Overdraft total For an overdraft total, the highest order unit 1| of the totalizer registers "9 and one or more next lower units may also register 9 since the nines complement of the true overdraft stands registered in all the nine units. For example, if the true overdraft is 60 l7,`the units will stand at 9999939 82. A fugitive-1 mechanism, not shown, but exemplified in my aforesaid Patent lil No. 2,192,365 causes the lowest order unit to l in the above example, is 3 or the complement of the first true overdraft digit 6. .By initially operating the case shift mechanism, the type ac` tions selected in accordance with the mines-complement digits registered in the units 1| may print the true overdraft since each numeral type bar has an upper case digit-type which is the nimes-complement of its lower case digit-type. The 0 type action has the lower case digit-type "0 and the upper case digit-type 9; the l type action has the lower case and upper case digit-types "1 and 8, respectively, and so on to the 9 type action which has the lower case and upper case digit-types 9 'and "0, respectively.

Preparatory to printing an overdraft total, the total key |00 is depressed to release the carriage for resulting advance to the position, in the total' printing zone, corresponding to the highest order unit 1|, the carriage settling at said position as hereinbefore described. Just before reaching this position, the carriage will have depressed the cam plate 88 corresponding to the totalizer from which the total is to ,be printed so that the corresponding set of feelers |20 will assume total reading positionsagainst stops H9 on the units. The depression of said cam plate 88 releases shaft H1 which rocks counterclockwise to release said feele'rs. Since the highest unit 1I stands at 9, it presents a stop I9 to arrest its feeler |20 with the tab |33 thereon positioned under blade |35. The slight advance of the highest pin bar 12 by the carriage depressing the highest jack 8|, as the carriage settles in said highest position, lifts tab |33 'by means of interponent |28 so that said blade |35 is also lifted'to bring the corresponding two contacts |39, |4| together to close a circuit, hereinafter described, to excite case shift magnet SH.

The excited magnet SH attracts its armature plate |1| to lift the case shifty draw link |6| to engage dog 46 thereof with snatch roll 41,. The

resulting rearward stroke of draw link |6| rocks lever 20B and easel-:shift key lever |83 counterclockwise to operated positions; and, correspondingly, slide |89 is shifted forwardly to retract its' stop 9i from, and thereby release, clutch dog 93 to engage snatch roll 41 sothat the latter drives eccentric |92 through one-half Vrevolution as determined by the disengagement of said-dog from the snatch roll upon interception of the dog by the second stop of the forwardly shifted slide |89. This half revolution of eccentric |92 works through strap |98 and rocker arm 288 to y 206 and interlocked with latch leverv 2|5, 2|1 Vto block return of levers 206, |83 and slide |89, all

as hereinbefore described under the heading Case shift mechanism.

Supnressing operation of the 9 type bar An arm 323 ixed to rock shaft 2| 5 has a stud 325 normally held against a rear edge of rod 2|2 by a spring 326 connecting said stud and a stud on rod 2|2, Figs. 4, 6, whereby the counterclockwise rocking of lever 206 rocks said shaft 2|5 counterclockwise. This interposes a stop 321, on an arm 328 fixed to said shaft 2 I5, below a shoulder 328 on an arm of a lever 330 loosely fulcrumed on an extension 203a threaded upon the shank of the right-hand stud 203 on shift frame 205, as in Fig, 7. Lever 330 is located between spacing collars 33| fixed to extension 203B and is urged clockwise by a spring 332 anchored to one of said collars so that an edge 333 of a forwardly extending arm of said lever 330 normally bears against the underside of a cross rod 334 supported within the typewriter frame F. The stud extension 203, being on shift frame 205, is movable with the latter downwardly a distance equal to the case shift. At the initial portion of said downward movement of stud 203, the edge 333 of lever 330 continues to bear against rod 334 under the iniiuence 0f spring 332, whereby said lever turns clockwise about rod 334 as a fulcrum until the shoulder 329 on the rear arm of said lever 330 rests on the interposed stop 321. Then as the downward case shift movement of shift frame 205 and its said stud extension 203e is completed, the lever 330 is turned Icounter-clockwise about the interposed stop 321 as a fulcrum to depress the forward arm of said lever 330 so that a stud 335 thereon descends and engages an arm 336 of a lever 331 and rocks said lever clockwise about its pivot 338 on'one part 339 of the 9 type action sub-lever 36. This clockwise rocking of lever 331 withdraws a stud 340 thereon from a slot 34| in another part 342 of the 9 type action sub-lever, whereby said part 342 which has a draw link 44, and a rod 83 for operating the 9 pin setter, is operatively disconnected from the other sub-lever part 339 which is connected by link 42 to the 9 type bar 24. The 9 sub-lever parts 338, 342 and the fulcrum end of the 9` key lever 35, disposed between said parts, are fulcrumed on rod 32 and are received in a slot 3| of cross member 30. Lever 331 and sub-lever part 338 are connected by a spring 343. It will be seen now that the 9 sub-lever parts 339, 342 and their coupling lever 331 are similar to those hereinbefore described for the 0 type action sub-lever.

Disabling and reenabling the 0 type bar Y preparatory to overdraft total printing Inasmuch as rock shaft ||1, Fig. 1, becomes rocked counterclockwise, to release feelers |28, Just before the carriage reaches' the highest denominational position in respect to overdraft printing, it operates as hereinbefore described to lift control bar 294 counterclockwise about its pivotal connection 295 to link 299, and thereby lever2-98 is rocked counterclockwise and disconnects parts 218, 219 of the 0 type action subiever and renders the 0 type bar 24 inoperative.

Nevertheless, the 0 type action must be restored to printing eifectivity by reconnecting its said disconnected parts 218, 219 before operation of any of the. numeral type actions occurs for overdraft total printing.- The reason for this is that the-flrst. or any other, significant figure of the true overdraft total may be a 9," which stands in ,the totalizer as 0." This figure is printed by the 0" type action, using the upper case or 9 type. The reconnection of said parts 218, 219 is effected as follows: As the shift frame 285 is moved downwardly to upper case position, a lower cam edge 344 of link 298, Fig. 3, pivoted on frame 285 and connected to control rod 294. engages and is deflected by a rod or stud 345 supported in the framework. The link 295 is thereby rocked clockwise about its stud 258 to draw control rod 294 forwardly to withdraw its upper step 3 |9 from tab 292 of lever 298. It results that lever 298, link 289 and 0 coupling lever 28| return to normal positions, as urged by springs 285, 388, and effect reconnection of the 0 sub-lever parts 218, 219. It will be apparent now that the case shift operation of magnet SH under control of the highest order unit 1| registering overdraft 9 serves to effect disconnection of the 9 type bar from its operating train and reconnection of the previously disconnected 8" type bar to its operating train.

Circuit control by case shift Two outer resilient contact blades a, c, and a middle resilient blade b may be mounted on and insulated from the side of housing 252, Figs. 4,' 6, and from each other. The shift frame stud 258, which carries link 298, also pivotally supports a lever 341 whose upstanding arm is operatively connected by a rod 348 to the middle contact blade b which has a set so as to be normally in contact with the front contact blade a and out of contact with the rear contact blade c. This normal contacting of blades a and b obtains when the shift frame 285 is in upper position, for lower case typing, so that when the blade |35 in the computing base is lifted under control of the highest order unit registering the overdraft 9 and brings the corresponding Contact blades |39, |4| together, a circuit is made to excite the shift magnet SH. The resulting lowering of shift frame 285 to upper case position lowers the lever 341 so that a cam edge 349 on a depending arm thereof engages, and is defiected by, stud 345 to rock said lever 341 clockwise and push the rod 348, whereby the rod sleeve 348EL shoulders the middle blade b out of contact with the front blade a and into contact with the rear blade c, as the case shift is completed. The circuit to the case shift magnet SH, which has done its work, is thereby broken, and, instead, through the contact blades |39, |4| which are still together and the now closed contact blades b and c, a circuit is made to the 9 magnet M to excite the latter.

Said 9 magnet, when thus excited, causes the 9 draw link 44 to be connected to and operated by snatch roll 41 to rock the 9 sub-lever part 342 counterclockwise to set the 9 pin 13 in the highest pin bar 12. A link 358 pivoted to said sublever part 842 has a one-way drive connection 35| to an arm 352 fixed to rock shaft 3|5 so that the latter is also rocked counterclockwise. The "9" draw link 44 finally encounters its knock-off 5| and becomes disconnected from snatch roll 41, whereupon the 9 sub-lever part 842 and its draw link 44 may complete their strokes by momentum and are then spring restored to normal positions. The counterclockwise rocking of sub-lever part 342 operates through the train; namely, rock shaft 3|5, connected arms 3|9, 3|8, frame 239, 248, and frame 248, 245, to rock the escapement dog rocker 238 clockwise. Conversely, when said sub-lever part 342 is restored clockwise, said train is spring restored and escapement dog rocker 238 is spring restored counterclockwise.

The described rocking of escapement dog rocker 238 results in a letter feed step of the carriage to the next lower denomination for which, according to the above example, the unit 1| registers an insignificant 9. At said next lower denomination, the carriage depresses the corresponding denominational jack 8| to slightly advance the corresponding pin bar 12. Since said next lower unit registers 9, its feeler |28 is positioned with its tab |33 under the 9 blade |34 so that said slight advance of said next lower pin bar 12 lifts said 9 blade |34. It may be noted here that all the units 1| below the highest denomination determine selection of said 9 blade |34 if they stand at 9, and that it is only the highest unit, standing at 9, that can determine selection of the case shift blade |35, the digit stops ||9 on the units being arranged accordingly. 'I'he lifting of the "9" blade |34 brings its contacts |39., |4I together to excite the 9" magnet M. It results that the 9 sub-lever part 342, still disconnected from the 9" type bar 24, is again operated, without printing, to index 9 and cause another letter feed step of the carriage.

As will be understood now, the operation of the 9 sub-lever part 342, without printing, is automatically repeated for each unit 1| that registers an insignificant 9" of an overdraft; and, correspondingly, each insignificant 9" is indexed and the carriage is advanced step by step to the position corresponding to the unit 1| that registers the first significant figure 3 in the above example, namely, 9999939 82. At this position, the 3 blade |34, having been selected, is lifted and brings its contacts |39, I4| together to excite the 3" magnet M and thereby cause operation of the 3 type action to index 3 in the corresponding pin bar 12 and at the same time print 6, which is the first digit of the true overdraft.

The printing stroke of any type bar 24 to print the first true overdraft digit moves the escapement universal bar 259 rearwardly and rocks its frame 253-256 clockwise in order to effect the letter feed step of the carriage. As said frame 253--259 is rocked clockwise, its stud 298, which has been lowered along with shift frame 285, en gages a cam edge 354 of a bell crank 355 and rocks the latter counterclockwise on its fulcrum stud 345. Said bell crank 355 has a. pin-and-slot connection 355 to an arm 351 fixed to shaft 2|5, and, therefore, Asaid shaft 2|5, which had previously been rocked -counterclockwise, is also rocked clockwise to withdraw the stop 321 from shoulder 329 on lever 338. At this clockwise rocking of shaft 2 I5, the arm 323 thereof, being connectedto spring 326, strctchesthelatter-idly since therod by its spring 332 about-stud extension 203s on the' still lowered shift frame 205. This clockwise' rockingv of lever 339 is stopped by cross' rod 334 and raises its stud 335 to release the coupling lever, 4

331 so that the latter is turned .counterclockwise by its spring 343 to enter its stud 349 into slot 34k 1,1 to disenfsg it ffnm'stud mof imam. n results that-.rodffZH- moves' lever V293 turns clockwise, and .draw link lil' moves forwardlyv to bring these parta-shaft 215', its arms 323, 324, and. bell crank 355, to normal position under the influence `of springs 62,326. At this clockwise return of lever 236, the case shift lever |33 rocks clockwise, and slide |39 moves rearand thereby reconnectthe 9" sub-lever parts 333,

342 and so render` the 9 typeaction again operative to print. Atforward return of universal bar 259 with recoil of the type bar, thestudll recedes from cam edge 354 of bell crank'355. This permits the stretched spring 326.110 turn shaft 2li counterclockwiser until stop 321 bearsV on the back edge of lever 330 above the shoulder 329. f f

The sub-lever part 342, Figs. 4 and 6, has a land 358 which may be concentric with fulcrum 32, and the front edge of the slot 34| extends substantially above said land so that said land and front edge afford guides into the slot 34| for'the pin 340. The other sub-lever part 339 may have a stop edge 353 upon which pin 340 may rest instead of resting upon the bottom of slot 34| in the normal positions of the parts. The sub-lever parts 218, 219, Figs. 1, 3, may have similar formations.

By the letter-feed-step of the carriage which attends the printing of the first true overdraft digit 6, the position corresponding to the next lower unit 1|, which stands at 9, is reached,

and it results that the 9 magnet M is again excited so that the 9 type action, whose parts 339, 342 have become reconnected, is operated to index 9 and print 0" by its upper case type, the type bar system being still in upper case position. The attending letter feed step of the carriage and the cooperation 4of the skip device, not shown, for skipping the punctuation space bring the carriage to the position for the next unit 1| which stands at 8, and it results that the 8 magnet M becomes excited and the 8 type action becomes operated to index 8 and print the upper case 1. In a similar way, for the last overdraft digit, the 2 magnet M becomes excited and the 2 type action becomes operated to index 2 and print the upper case 7.

In the letter-feed-step which attends the typing of the last digit, the carriage overrides the cycling trip lever 9| for a resulting cycling operation of the general operator mechanism in the computing base. In this cycling operation, the pin bars 12 indexed with the overdraft cornplement v9999939 82 are operated to rotate the order units 1| subtractively, by means of the idlers 13, to clear them.

'Restoration to lower case A cam disc 359, Fig. 6, fixed to cycling shaft 91 is engaged by a spring-pressed follower arm 360 fulcrumed in the computing base. A link 36| connects said arm 360 to an arm 362 fixed to a rock shaft 363 journaled in the framework of the machine. An arm 364, fixed to said shaft, has a stud 365 under the thrust rod 2|9. At the inltial part of the cycle or clockwise rotation of cam disc 359, a cam rise' 366 rocks clockwise the follower 360 which, through the described connections moves thrust rod 2|9 upwardly to rock the case shift latch lever 2|6, 2I1 counterclockwise wardly to normal position under influence of i spring |36, thereby withdrawing stop ,|35 on said ,slide from clutch dog. |33 to allow the lattery to Aengage snatch roll 41, whereby eccentric |92 isv turned a half revolution `or until said psw! is intercepted by the primary stopV Luxor the restored slide |33. g This half revolution of eccentric |92rai'ses shift frame 245120- its' lower ease position. A s shift frame 263 is thusraised and.

restored, the switch lever 341 thereon is also raised relatively to stud 349 and freed for counterciok'wise mdyement. thereby letting switch [blade b move resiliency to break contact with blade c and remake its contact with blade ja. In theraising or restoration of shift frame 205, the lever 330 turns counterclockwise, about irod 334 as a fulcrum, to normal position, Fig. 6.

When a case, shift is effected ordinarily, that is, in response to manual operation of case shift key lever |83, the lever 206 and parts, including stop 321, controlled thereby remain in normal positions. Under this condition, the case shift movements of shift frame 205 and its stud extension 203, which carries lever 330, turn said lever idly about rod 334, since said lever may bear idly against said rod 334 as a fulcrum under the urge of spring 332. The stop 321, being in normal position, does not arrest r.the movement of Circuits and their operation The escapement switch 265 is preferably connected in one ofi the leads 361, Fig. 10, to the input side of a transformer S connectible by a plug 366 to anA A. C. current supply. The output of the transformer goes to a current rectifier 369 to which are connected a common lead 310 to one terminal of each of the magnets M, SH, and ay lead |41'L to the common contact strip |41 for the upper contact blades |4I. Each of the ten type action magnets M hasits other terminal connected by a lead 31| to the corresponding lower contact blade |39. The lead 31| for the 9 magnet M has a lead 312 to the contact blade c, shown also in Figs. 4, 6. One terminal of the case shift magnet SH is connected to the common lead 310, and its other terminal -is connected by a lead 313 to the contact blade a with which the middle contact blade b is normally in contact.

The middle contact blade b has a lead 314 to that lower contact blade |39 which is operable by the cross blade |35, Fig. l, under control of the carriage and highest unit 1| when the latter registers an overdraft 9. When blade |35 is lifted and closes its normally separated contact blades |39, I4 l, the case shift magnet SH takes a current through the following circuit; rectifier 369, lead 310, magnet SH, lead 313, closed contact blades a and b, lead 314, closed contact blades |39, |4|, common contact strip |41, and lead |4`|a back to rectifier 369.

The resulting case shift operation moves the middle contact blade b to the dotted line position, Fig. 10, to open the contact blades a and b to cut out magnet SH and, instead, close the oontact blades b and c to direct current t the "9" magnet M through the following circuit: rectiner 349, lead 310, "9" magnet M, leads 31|, 312, closed contact blades c, b, lead 314, closed contacts |39, |4l, comon contact strip |41, and lead |41* back to rectifier 383. The case shift which has already occurred has caused the disconnection of the "9 type bar, by disconnecting the "9V sub-lever parts 333, 342, so that the operation of the lower sublever part 342, without printing, which results from exciting the 9" magnet by way of the closed contact blades |33, |4|, and b, c, indexes 9" in the highest pin bar 12 and operates the escapement dog rocker 230 counterclockwise from the Fig. 8 to the Fig. 9 position by way of shaft 3I3 and its connections to the frame 243, 24|, Fig. 4. 'I'he resulting release and swing of the stepping dog 233 from the Fig. 8 to the Fig. 9 position has caused the escapement switch 283 to open the primary side of the transformer. 'I'his deenergizes the 9 magnet M, and, further, this 9 magnet M, or any oth'er magnet, cannot be energized again until switch 285 is reclosed by the |39, |4|, the corresponding magnet M takes cury rent. The circuits and operation for the several magnets M are similar, and, therefore, there will be described only the following circuit and operation for, say, the l magnet M: rectifier 363, lead 310, i magnet M, lead 31|, closed contact blades |39, |4|, common contact strip |41, and lead |41 back to rectifier 369. The resulting energlzation of the 1 magnet M causes the 1 type action to be operated in a printing stroke. toward the end of which the l type bar operates universal bar 259 to rock dog rocker 230 counterclockwise from the Fig. 9 to the Fig. 9 position preparatory to a letter feed step of the carriage. The attendant clockwise rocking of stepping dog 233 about pivot 234 to the Fig. 9 position causes the switch 265 to be opened. This deenergizes the 1 magnet M, and this magnet, or any other magnet, cannot be energized again until switch 295 is reclosed by the stepping dog 233 being moved back to the Fig. 8 position by the carriage taking its letter feed step upon return of the dog rocker 230 as the operated l type bar recoils from the platen.

It will be evident now that as far as operation of any type action is concerned the switch 285 is opened before the can'iage starts a letter feed step and is reclosed only at about the instant the carriage completes the step and that there is practically little or no possibility of operating another magnet and, hence, starting another type action operation while the carriage is taking its letter feed step. This provides for timing the incidences of type action operations sufficiently apart to avoid clashing of type bars; moreover, a type action and its pin-setting bar 18 will not be operated while a pin bar 'l2 is'being restored from, and the next pin bar 'l2 is being advanced to, pin-setting position during the letter feed step of the carriage, and, so, collision between a pinsetting bar 'I8 and a pin bar 72 is avoided, reliable indexing is assured, and, further, the seriaof numeral type actions and means to operate said type actions automatically, one by one, according to a total in said totalizer, one of said type actions including an insignificant-figuretyping member and an operating member and also including an operable-coupler normally coupling said members, of total-taking-control means, an element moving to an operated position in response to operation of said control means preparatory to printing a total, a disjointable connection between said element and cou..

pier normally effective to operate said coupler so' as to have the typing member disconnected from the operating member when said element is in operated position, said connection being disjointable to release the operated coupler for reconnecting said type action members, and means operable by anoth'er type action to disjoint said connection, while said element remains in operated position, to release the coupler.

2. In a machine of the character described, having a totalizer, the combination with a plurality of numeral type actions and means to operate said type actions automatically, one by one, according to a total in said totalizer, one of said type actions including an insignificantilgure-typing member and an operating member and also including an operable coupler normally coupling said members, of total-taking-controi means, an element moving to an operated position in response t0 operating said control means preparatory to printing a total, a disjointable connection between said element and coupler normally effective to operate said coupler so as to have the typing member disconnected from the operating member when said element is in operated position, said connection being disjointable to release the operated coupler for reconnecting said type action members, means operable by another type action to disjoint said connection, While said element remains in operated position, to release the coupler, means subsequently operable to restore said element and means effective to restore said disjointed connection upon restoration of said element.

3. In a machine of the character described, having a totalizer, the combination with a plurality of numeral type actions and means Lo operate said type actions automatically, one by one, according to a total in said totalizer, one of said type actions including an insignificant-n3- ure-typing member and an operating member and also including an operable coupler normally coupling said members, of total-takng-control means, an element moving to an operated position in response to operation of said control means preparatory to printing a total, a disjointable connection between said element and coupler normally effective to operate said coupler so as to have the typing member disconnected from the operating member'when said element is in operated position, said connection being disjointable to release the operated coupler for reconnecting said type action members, a case-shiftable part, and means operable by a case shift of said part to disjoint said connection, while said control aao'asos element remains in operated position, to release the coupler.

4. In a machine of the character described, having a totalizer, the combination with a plurality of numeral type actions and means to operate said type actions automatically, one by one, according to a total in said totalizer, one of said type actions v including an insignificant-figuretyping member and an operating member and also including an operable coupler normally coupling said members, of total-taking-control means, an element moving to an operated position in response to operation of said control means preparatory to printing a. total, a disjointable connection between said element and coupler normally effective to operate said coupler so as to have the typing member disconnected from the operating member when said element is in operated position, said connection being disjointable to release the operated coupler for reconnecting said type action members, a case-shiftable part, and means including devices effective upon operating another type action or upon case shifting said part to disjoint said connection, while said control element remains in operated position, to release said coupler.

5. In a` combined typewriting and computing machine having a typing carriage and a totalizer,

i the combination with numeral type actions and mechanism, including an element initially movable to an operated position, for eifecting automatic operation of said type actions under control of said totalizer and carriage to print a total, two of said type actions including each an operating member, a typing member, and an operable coupler normally connecting said members, of a disjointable connection operable by the initial movement of said element to operate the coupier of one of said two type actions to disconnect its members, a case shift mechanism operable under control of the totalizer and carriage, and means coacting with operation of the case shift mechanism to operate the coupler of the other of said two type actions to disconnect its members and to disjoint said connection to free the first-operated coupler and thereby permit it to reconnect the mst-disconnected type action members.

6. In a combined typewriting and computing machine having a totalizer and a carriage, the combination of type actions each comprising a typing member and an operating member normally operatively connected, the members of one of said type actions having an operable coupler urged to coupling condition, a universal bar operable by said typing members, a case-shiftable part, a settable control for said coupler, mechanismoperative under control of said totalizer and carriage to set said control and then to case shift said part, means, governed by the set control, to coact with the case shift of said part to operate said coupler to disconnect said members of said one type action, and means operatively connecting saidcontrol to said universal bar at the case shift of said part so that said control becomes disabled, upon operation of said universal bar by another type action, for resulting restoration of said coupler.

'1. In a machine of the character described, the combination with a. totalizer, of typing mechanism, including a type-action having a sub-lever composed of a driving member and a driven type-actuating member, a common fulcrum axis on which said members are pivoted side by side,

a coupling lever fulcrumed on one of said members and normally having a position in which it has coupling connection with the other member, a total-taking control, including a rockable memberoperab1e preparatory to operating said typing mechanism to type a total in the totalizer, and lever mechanism operatively connecting the rockable member of said control and said coupling lever and effective upon operating said control, to move said coupling lever to position to dis- (tscnnect said sub-lever driving and driven mem- 8. InA a machine of the character described, the combination with a totalizer, and a Itypeaction having a driving member, type-actuating driven member and a device normally coupling said members and operable to uncouple said members, of a case-shiftable part, a two-armed lever carried by said part, a rest forming a fulcrum engaged by one arm of said lever and about which said lever is constrained toturn in one direction when said part is case shifted from a normal position. a stop interposable to arrest another arm of said lever and cause it to turn in the opposite direction at said shift of said part, means operatively connecting said lever and said coupling device so thaty the latter is operated to uncouple said members at the shift of said part il said st op has been interposed, and means operable under control ofn said totalizer to interpose said stop.

9. In a machine of the character described, having a power-operated driver, a type-action actuator movable into position for actuation by the driver, and amount-indexing mechanism; a numeral type action cooperative with the indexing mechanism to index its numerical value and conditionable for non-printing or for printing its numeral concomitantly with indexing, said type actlon comprising a type bar. a sub-lever including a driving member and a driven member, said driven member being operatively connected to the type bar, said driving member having two arms rigid therewith, one arm directly connected to said actuator, lthe other arm having a connection to actuate said indexing mechanism, a common fulcrum axis on which said members are pivoted side by side, each of said members having an opening in substantial registry, and a coupler movable on one of said members and having a part seatable in said openings for joint actuation of the type bar and indexing mechanism, and withdrawable therefrom for actuation of the indexing mechanism alone.

10. In a combined typewriting and computing machine having a totalizer which may contain the complement of a true negative total, and a typing carriage, the combination with a case shift mechanism, and an operable numeral-value device, of two magnets individually excitable for determining operation of said case shift mechanism l and said device, respectively, means, operable under control of said totalizer containing a complemental negative total, the unoperated case shift mechanism and carriage, to excite the case shift magnet for resulting operation of the case shift mechanism, and means, operable under control of said totalizer, the carriage and thev operated case shift mechanism, toexcite the other magnet for resulting operation of said numeral value device.

- l1. In a machine of the character described adapted to type totals and having a carriage movable in denominational order steps through a total-typing zone, the combination of a totalizer operable to an overdraft condition, a caseshiftable part, a power drive, a case shift control shiftable to and from an operated position, a clutch device operatively connected to said control so as to be effective upon the shifts of said control to and from operated position to enable said power drive respectively to case shift and restore said part before and after typing an overdraft, an actuator for said control connectable to said power drive, and means operable partly under control of .said totalizer at overdraft and partly under control of said carriage at said zone to connect said actuator to said power drive for resulting shift of said control and case shift of said part.

12. In a machine of the character described adapted to type totals and having a carriage movable in denominational order steps through a total-typing zone, the combination of a totalizer operable to an overdraft condition, a caseshiftable part, a power drive, a case shift control shiftable to and Vfrom an operated position, a clutch device operatively connected to said control so as to be effective upon the shifts of said control to and from operated position to enable said power drive respectively to case shift and restore said part before and after typing an overdraft, an actuator for said control connectable to said power drive, means operable partly under control of said totalizer at overdraft and partly under control of said carriage at said zone to connect said actuator to said power drive for resulting shift of said control and case shift of said part, said control tending to return from operated position, and means to keep releasably said actuator and, hence, said control in operated position.

13. In a machine of the character described adapted to type totals and having a. carriage movable in denominational order steps through a total-typing zone, the combination of a totalizer operable to an overdraft condition, a caseshiftable part, a power drive, a case shift control shiftable to and from an operated position, a clutch device operatively connected to said control so as to be eiective upon the shifts of said control to and from operated position to enable said power drive respectively to case shift and restore said part before and after typing an overdraft, an actuator for said control connectable to said power drive, means operable partly under control of said totalizer at overdraft and partly under control of said carriage at said zone to connect said actuator to said power drive for resulting shift of said control and case shift of said part, said control tending to return from operated position, means to keep releasably said actuator and, hence, said control in operated position, a general operator mechanism, and means cooperative therewith to release said actuator from said keeping means for resulting return of said control and Case shift of said part back to normal.

HENRY L. PI'IMAN.

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