US2655245A - Tabulating mechanism for type writers and like machines - Google Patents

Description

W. T. SAGNER Oct. 13, 1953 TABULATING MECHANISM FOR TYPEWRITERS AND LIKE MACHINES 2 Sheets-Sheet 1 Filed Dec. 8, 1950 r i P @Q INVENTOR. WALTER T SAGNER ,655,245 TABULATING MECHANISM FOR TYPEWRITERS AND LIKE MACHINES Filed Dec. 8, 1950 W. T. SAGNER Oct. 13, 1953 1NVENTOR. WALTER r SAGNER BY WM A TTORNEV Patented Oct. 13, 1953 .TABULATING MECHANISM FOR TYPE- WRITERS AND LIKE MACHINES,

Walter T'. Sagner, West Hartford, Conn., assignor to Underwood Corporation, New York, N. Y., a

corporation of Delaware Application December 8, 1950, Serial No. 199,840

Claims. 1

This invention relates to tabulating mechanisms for typewriters and like machines, and has reference particularly to such mechanisms wherein the tabulator reeds are spring projecting and power retracted.

In tabulating mechanisms of this kind, exemplified in the Yaeger Patent No. 2,384,060, dc.- pressing any tabulator key will release a corresponding reed for spring projection and also release the carriage for a tabulating run, all occurring although the power of the machine is shut off. In that retraction of the thus released reed and the resultant restoration of the carri'age to letter-feed control depend for operation on the motor power 'of the machine, the carriage cannot be returned to its previous position until the motor switch of the machine is again turned on and the normal condition of the tabulating mechanism is thus restored.

While the above difficulties may be had by inadvertent operation of the usual decimal tabulator keys, the difficulty more frequently arises. with typewriters equipped with a palm tabulator key- For instance, in merely placing the dust cover on the machine at night, the typi-st may readily hit the palm key, which would immediately tabulate the carriage to a laterally projecting position from which same may not be returned unless the motor power is again turned on.

Accordingly one of the objects. of the invention is to obviate the foregoing difficulties by providing a locking means preventing effective operation of the tabulator keys unless the motor switch of the machine is in its on position.

Another object is to provide, in a tabulating mechanism wherein the reed or reeds are springprojected and power-restored, means under control of the motor switch and eifective in the ofi position thereof, to block operation of the power means and thereby prevent spring projection of said reeds.

In its more specific aspect the invention concerns power tabulating mechanisms of the kind shown in the said Yaeger patent, No. 2,384,060, an object being to prevent inadvertent operation by the decimal tabulating keys or the palm key when the switch controlling. the electric motor of the machine is in 01f position.

With the above and other objects in view the invention will now be described with reference to the accompanying drawings wherein one embodiment which the invention may assume in practice is shown for purposes of illustration.

In the drawings,

Fig. 1 is a perspective view of the tabulating mechanism embodying the invention.

Fig. 2 is a fragmentary elevational view of the mechanism shown in Fig. 1, as viewed from the right hand side, the locking device being in its ineffective position corresponding to the on position of the motor switch.

Fig. 3 is a view similar to Fig. 2 but with the locking device in its effective position corresponding to the off position of the switch, and

Fig. 4 is a fragmentary front elevation of that portion of the mechanism for controlling carriage return, in the condition of effecting a power carriage return and with the motor switch on.

The present invention is shown in the drawing in the manner in which it may be applied to a power tabulating' mechanism of the kind shown in the Yaeger Patent No. 2,384,060. Only a brief showing of the mechanism of the Yaeger patent isv given herein, reference being had to said patent for a more detailed disclosure.

Referring to Fig. 1, a platen carriage is supported by means including a rail 1 for travel on the mainframe of the typewriter in letter-feed and return directions. The carriage is moved in letter-feed direction by the usual spring drum 8 connected by a draw band 9 to the carriage. The usual letter-feed mechanism is provided, of which only the escapement wheel [0 and a feeddog I I are herein shown. The escapement wheel I0 is operatively connectedv to the platen carriage 6 by means including a pinion I2 and gear rack I3, the latter being on the carriage. The dog II is the one of the usual two feed-dogs which, in the inactive condition of the feed mechanism, is engaged with the escapement wheel. The two feed-dogs are carried on a dog rocker, not shown, and are thereby brought alternately into coaction with the escapement wheel to effect the step-by-step feed, in the well-known manner- The dog I l is pivoted on the dog rocker and is spring-urged toward engagement with the escapement wheel l0 and, to free the carriage for a tabulating run, may be swung clear of said wheel by a lever l4 operated by means later described.

Carriage return may be actuated by poweroperated mechanism such as that partly shown in Fig. 4, which corresponds substantially to that fully disclosed in my co-pending application, Serial No. 27,224, filed May 15, 1948, now Patent No. 2,541,295, issued February 13, 1951. ring to Fig. 4, an electric motor, not shown, continuously rotates a gear l5 carried on a spindle [6. The gear 15 has clutch teeth with which like teeth of a clutch collar I'I engage to effect a driving connection to a drum It, to which collar IT is slidab-ly splined. The drum I8 and collar I? are journalled on but rotatable independently of spindle IS. A draw-band 20 around the drum [8 extends therefrom over suitable guide means and is connected at its other end to the carriage 6. An encased spiral spring 2| tends to rotate the drum 18 in the direction such as to maintain the draw-band 20 constantly taut Referduring all movement of the carriage. The clutch collar E1 is shiftable into and out of driving engagement with gear I5 by a fork 22 engaging a groove of said collar and supported on a rockshaft 23. Also secured to said shaft is an arm 2d connected by a link 25 to a carriage-return clutch-control lever 26 pivoted at 21. A spring 28 acting on arm 24 tends to slide collar I! to clutch-engaging position, and thereby tends to swing the control lever 25 upward about pivot 27, in which position said parts are shown in Fig. 4, effecting carriage return.

As shown, the clutch-control lever 26 is in the tripped or released position, which it assumes in order to close the carriage-return clutch. With the carriage-returnclutch open or disengaged, the control lever 26 is in a lower position as indicated by the dot-and-dash outline of its end portion in Fig. 4. Lever 25 is releasably retained in said lower position by a latch device comprising primary and secondary latches 29 and 36, operated to release lever 26 by depressing a carriage-return key, as disclosed in my said copending application. The operative connection of the carriage-return key to latches 29, 36 is such that as the key is depressed, primary latch 29 moves rearwardly, or rightwardly as viewed in Fig. 2, and thus releases control lever 26 to the force of spring 28. The secondary latch 35 is idle under this condition and becomes effective only in the event that the termination of carriage-return swings lever 26 down and yet the latch 25 has not been restored because the carriage-return key is held depressed. In such instance the secondary latch 30 temporarily holds the lowered lever 26 until release of the carriage-return key allows the primary latch 29 to take over. The restoration of control lever 25 to its lower, inactive position, automatically incident to completion of carriage return, is effected by mechanism, not shown herein, forming part of the subject matter of my said oo-pending application. Said mechanism becomes effective when a carriagereturn limiting stop 3|, Fig. 1, engages and moves a counterstop, not shown. The stop 31 is one of the two conventional margin stops carried on a rack bar 32 on the carriage 6.

The electric motor which, as stated, furnishes the power for the carriage-return mechanism,

may also actuate other mechanisms of the type- M writer, such as the type actions, case-shift mechanism, etc. The operating means for these various power-operated mechanisms usually includes a constantly rotating drive element, herein shown as a snatch roll 33, Fig. 1, connected by suitable power-transmitting means to the motor.

In the electric circuit of said motor is a snap switch 35, Fig. 1, having an operating arm 36 operable from the front of the machine by a control element or knob 31. The knob 31 is fast on a stub shaft 33 which carries at its inner end a slotted arm 40. The slot of arm 49 engages the crank end 41 of a shaft 42. The rear end of the crank shaft carries a plate 43 provided with a stud 44 into a socket of which the ball end of switch arm 36 extends. The coaction of the stud M with the switch arm 36 is such that turning the knob 31 rightward from the ofi position of Fig. 1 closes the snap switch and turning the knob leftward opens the switch. The plate 43 has articulated to a prong 45 thereon a rightwardly extending rod 46 which near its right end is slidably guided in a hole 4 1 in a tabulator housing 48, Fig. 2. An angular end 49 of the rod 46 overlies the clutch-control lever 26 nd. i

guided in a transverse slot 50 of a bracket secured to fixture 48. With the switch 35 in the off position as in Fig. 1, the rod end 49 coacts with the adjacent inclined edge of the clutchcontrol lever 26 so that the rightward end thereof is held lower than the shoulders of both the latches 29 and 30, see Fig. 3. This position of the control lever end in relation to said latch shoulders is of importance, also, with respect to the motor-switch control of the locking device of the tabulator mechanism, later described. With the switch in off position and the end of lever 26 therefore held down, as described, it follows that no power carriage return may be instituted by operation of the carriage-return key. This feature forms part of the subject matter of the Helmond Patent No. 2,366,107.

In that the power-operated tabulating mechanism, now to be described, is like that shown and described in detail in the Yaeger patent, No. 2,384,060, only a brief description will be given. Referring to Fig. 1, a tabulator rack 52 at the rear of the carriage 5 carries a series of stops 53, each of which is settable downwardly to an effective position for cooperation with the raised one of a group of denominational tabulator reeds 54. The reeds are slidably supported in the housing 48 for up and down shifting, and each reed has a spring 55 urging same upwardly. Each reed also has a forwardly extending shoulder 56 which is pressed by spring 55 into engagement with a cross bar of a bail-like frame 51, rockable on a shaft 58 and urged to swing counterclockwise by a spring 65. The bail frame, forward of its pivot 58, includes a rod 61 which by a link 62 connects the bail frame 51 to an arm 63 secured to a shaft 54 which also has secured thereto a second arm 65. The force of spring on the bail frame 51, transmitted to arm 65, tends to swing same forward. Blocking of the forward swing of arm 65 prevents the rocking of bail frame 51 and thus retains each tabulator reed 54 against being raised by its spring 55. The blocking of arm 65 and therefore the bail frame 51 is effected by a latch lever 66 abutting a bent-off end of said arm. By mechanism later described,

the depression of any tabulator key 61 will rock the latch lever 66 about its pivot 68 and thereby unblock the arm 55, thus allowing bail frame 51 to be swung counterclockwise by its spring 60. The tabulator reed 54 which has been selected for raising by means later described is thus permitted to be raised by its spring 55.

The means for selectively releasing a certain one of the tabulator reeds 54 for projection by depressing a selected tabulator key 67 includes mechanism operating on the permutation principle. Each tabulator key 61 is on a lever 75, an upstanding arm ii of which swings forwardly on depressing the key. The arm 7| thus forwardly moves a selected one or two of a set of four slides 12, determined by an arrangement of notches in the slides in accordance with the permutation system, and moves the slide or slides forwardly. An equalizing mechanism comprising two coacting levers 73 for each slide 12 assures fore-and-aft movement of the slides in a parallel, rectilinear motion. Each slide 12 is operatively connected by a Bowden wire cable '34 to a bell crank 15 at the rear of the machine so that when the selected one or two slides move forwardly a corresponding one or two of the bell cranks 75 is rocked clockwise. Said bell cranks individually shift laterally-slidable blades 13 leftwardly against the force of their restoring springs. The bottom edges .of said. blades [6 are notched in accordance with the per-mutation system, so that by shifting selected blades the notches of each blade are aligned with each other beneath only one of the tahulator reeds 54a and thus allow said reed to bespring-raised.

The above described. function of; bail. frame and associated mechanism, that of preventin raisingof the tabulator-reeds-id, serves primarily in conjunction with tabulating operations eflooted by a palm tahulator key, later described. The principal function of the bail Era-me 151: is .thatof a universalmember to power-retract or restore the raised reed, as presently described. Said bail frame :in its swinging action, incident to raising .a reed, also acts to release the. carriage to a-tabu'lating run by swinging the escapement dog It free of wheel It, for whichpurpose the bail frame 51 is connected .byxa pin-and-eslot connection 80 to the mentioned lever :14.

The mechanism for power-operating bail frame 51 is as .iollows:v Adjacent the arm :65 the shaft has anotherarm'tl to which alink82 is con neotedt Said link hasya pin-and-slot connection 8:3 to a: power actuator 84 movably supported at its forward; end by an varm'lifi. The actuator 84 is urged by :a spring .86; an upward and rearwarddirection to an. extent determined by step means, not. shown The actuator 84 pivotally carries; a drive pawl -8 -I- cooperating with, but normally :i'ree of, the snatch roll 33..

To efiect; power actuation :of the bail frame 51, the actuator M is drawn. downwardly against theiorce of spring 86 by means later described. During the downward movement of actuator 86 the pawl 8-! becomes engaged with the snatch roll 33 and, after limitedly rocking about its pivot, moves the actuator forward until a lug 88 thereon co-acts with the. snatch roll 3.3 to raise the actuator and thus disengage the pawl from the snatch roll. This forward movement. of'the actuator t lt'transmitted through the link 82 and arm at, rocks theshaft .6. which, through arm 63 raises link @2- and thus rocks the. bail frame 5% clockwise. The bail frame '51, .in restoring the. raised reed 54 to its normal position, thus assumes its position as shown 'Fig. 1 from which it had been swung by the raising action oi the reed. it: will be seen that the bail frame 51, the operating train (it-Moonnected thereto and the power-actuated device ilk-85 constitute a power-operated retracting means for the tabulator reeds 54.

It will be noted that the start of the tabulatin-g operation, incident to which the-selected reed was raised, was instituted by depressing one of the tabulator keys 6?, and this in turn swung the latch lever 66 clear of the arm 65. The releaseof the tabulator key allows latch lever 66 to be restored to its normal position where, upon completionof the power actuation of bail frame 51" as above described, said latch lever re-engages arm E5, to hold the bail frame and associated mechanism connecting the frame to the power actuator $4, in its normal or inactive position.

The operation of latch lever 66 by thetabulator keys 6? is efiected incident to the forward sliding of the blades 12. At their rightward ends said blades each have a shoulder 90 adapted to actuate an upstanding arm of a bell-crank lever EM, the other arm of which engages a lever 92, which in turn engages the forward end of latch lever 86. Lever 92 extends rightw-ardly from the point of engagement with lever '65 in aprong 93 at which point a leverage train, in-

eluding a palm tabulator key, engages lever 92 for operating latch lever- .6 E.

Thepalm-tabulator keymeohanism, not shown herein, may be as shown and described in said Yaeger patent. It. may be here noted that, because the palm-key mechanism in said patent operates independently of the tabulator-reed se' 'lecting mechanism, one of the reeds 54 is to. be released. without operating the selecting mechanism. That is, .one. of the reeds should be released solely by the swinging of the bail frame 51 as effected by release of the arm 65 from 0011'. trolbyzlatch lever 5.6. Accordingly the leftmost tabulator reed '54, associated with the tabulator key .6! or the cents. denomination is. adapted tor-release also by the palm key, this being accomplished in the manner clearly set forth .in said Yaeger patent.

As describedin said .Yaeger patent, the tabulator reeds :5 t are. limitedly movable leftwardly from their normal positions and this movement is employed to initiate a power operation of the retracting mechanism. Thus, a projected reed, upon/being engaged by a :set tabulator stop 53 during the then ensuing tabulating run, is caused to he'laterally moved slightly. This in turn initiates. the power operation of the restoring bail frame 511, so that the projected reed becomes automatically restored. An upright arm of a three-arm lever 94 is engaged by the leftmost reed 15.4. Lever ti t is: pivoted at 95 and is connected by a link 96 to a second lever 91 fulcrumed on shaft 58 and, from lever 91, is connected by alink 98 .to a bail I00. The rightward portion of bail I08 has a pin-and-slot connection IBI. to .a power-tripping lever 1G2 pivoted at I93 and urged by a spring I04 to swing clockwise. The 'force of spring HM, transmitted through the operating train just described, tends to rotate the three-arm lever 94 clockwise about its pivot 95 .and thus presses the group of reeds 5A to the normal rightmost position. The lever [.62. carries a hooked member Hi5 which, upon swinging said lever counterclockwise, becomes engaged with 2. lug I06 on the actuator 84, causing same to be lowered and thus initiate a power operationv of the restoring bail frame 57, as previously described. The connection of the hooked member I05 to lever I02 and the manner in which said :member operates, and thereafter becomes disengaged from, the power actuator 84 are well known and need not be here described.

The latch lever 66 has a latch It! pivoted thereon, said latch being spring-pressed clockwise, with its rightwardportion normally against the bottom of lever 66'. When an operated tabulator key 61 or the palm key is held depressed, latch I 81 prevents a repeat tabulation by temporarily latching arm 65 in its normal position as said arm reaches that position incident to conclusion ofa power operation of the reed-restorlng hail frameil In this way bail frame 51 is presented from again swinging upward by its spring 60, which would again release the carriage 6 and again project the reed 54 which had been selected by the depressed tabulator key. As soon as the operated key is released, the latch lever .66 returns. to its normal position shown in Fig. l and thus resumes control of the reedrestoring mechanism by re-engaging arm '65.

The various mechanisms described up to this point 'form the subject matter of or are disclosed in several prior patents, with the exception of the mechanism for automatically terminating power-return of the carriage, which mechanism forms part of the subject matter of my (re-pending application, Serial No. 27,224, now Patent No. 2,541,295, issued February 13, 1951. As aforeindicated, the principal related patent is that to Yaeger, No. 2,384,060, in the power tabulating mechanism of which the locking means of the present invention is particularly useful and advantageous. It will be recalled. that in said patent the tabulator reeds are springprojected and power-retracted, as herein described. The other related patent is that to Helrnond, No. 2,366,107, referred to in regard to the mechanism for manually operating the motor switch and in regard to the operative connection between this switch and the carriage-return clutch-control lever 25. It will be observed as the description of the present invention proceeds that the clutch-control lever and the motor-switch operating mechanism, with its operative connection to said lever, form a substantial part of the mechanism embodying the present invention.

The mechanism associated with the motorswitch operating means S'i-t i and the clutchcontrol lever 25, by which efiective operation of the tabulatcr keys is prevented while the motor switch is off, will now be described. It will be recalled that the clutch-control lever 26 is latched in a down position as shown in Fig. l by the primary latch 29 and that said lever remains in substantially that position during all operations of the machine occurring incident to typing, moving therefrom only to institute carriage return. It will also be recalled that under certain conditions, when they occur at the completion of carriage return, the secondary latch 53 will temporarily hold lever 25 until that condition is eliminated, after which the primary latch 29 again assumes control of said lever. For reasons explained in Helmond patent, No. 2,262,676, it is necessary that the latching shoulder of the secondary latch be slightly lower than the shoulder of primary latch 28, see Fig. 2. To enable the secondary latch to engage lever 26, said lever must in terminating carriage return be lowered sufficiently to have said latch hook over same. Thus the clutch-control lever 28, although remaining under non-operative control by the primary latch 29, is capable of slight up and down movement at its latched end. It will be observed that this slight movement occurs also in response to operating the motor switch between on and off positions. The upper position of lever 2'5, Fig. 2, in which its lever end portion is against the shoulder of latch 29, is assumed when the motor switch 85 is in the on position and the lower position of lever 23, Fig. 3. is assumed when said motor switch is in the "off position. Referring to Fig. 1 it will be evident that these two positions of clutch-control lever 26 in its non-operative state result from the camming action of the angular end 49 of rod M5 on the inclined edge of said lever. This slight movement of lever 25 is employed to control the locking device now to be described.

The shaft 64, forming a part of the mechanism by which the bail frame 51 is operated to power-restore the reeds 54, has at its rightward portion a C-shaped arm Ht secured thereto, the upper end of which provides a laterally extending lug HI. On a bracket H2 secured to the mainframe of the typewriter a locking lever H3 is pivoted by a stud H4. To permit lever H3 to yield under certain conditions, said lever is constructed of two parts H5 and H6. The two parts overlap and both parts are supported on the pivot stud H4. A spring H1 tensioned between upreaching arms on the two lever parts tends to rotate part H6 clockwise toward part H5, but is blocked from such relative movement by an adjustable eccentric HB on part H6 engaging an arm [20 on part H5. The two-part yieldable construction of lever H3, however, enables it to yield when the part H5 is rotated clockwise and part H6 is blocked against movement. The lever part H5 has a rearwardly projecting arm extending beneath the end portion of the clutch-control lever 26. The two-part lever H3 is urged by a spring (2| to swing counterclockwise, the spring being connected to the lever part H6 and anchored on bracket H2. The spring H1 is to be substantially stronger than spring l2! so that the two-part lever H3 will not yield under the restoring force of spring [2L In its normal or unoperated position, Fig. 2, the part H6 of lever H3 rests against a stop lug 22 on said bracket. The leftward portion of lever part H6 has two bent-off portions forming right-angularly related faces I23 and l24 extending laterally from said lever part.

The operation of the locking device comprising the two-part lever I 13 will now be described. It will be recalled that as a tabulating operation is initiated, the latch lever 66 is swung counterclockwise free of the lug of arm to thus allow the bail frame 5! to rock counterclockwise and thereby permit a selected reed 54 to be raised. During this action the shaft 64 rocks clockwise as viewed in Fig. 2 and the C-shaped arm H0, swinging therewith, advances its lug Hi past the face 123 of lever part H6. The lever face I23 is out of the path of lug H i because the two-part lever H3 is in its normal position, Fig. 2, which it assumes under the force of its spring I 2| when the clutch-control lever 26 is in its upper position against the shoulder of latch 29. This upper position of lever 26 is assumed when said lever is not influenced by the camming action of the rod end 49, the rod 45 being at a rightward position as viewed in Fig. 1 because the motor switch 35 is turned on. It will now be seen that a tabulating operation, initiated by rocking the latch lever 66, will progress to completion through the several phases of operation above described, as long as the motor switch 35 is turned on, with the control knob 37 thereof in the on position.

When the motor switch 35 is turned off by rotating its control knob 31 to the "off position, the resultant leftward shifting of rod 43 causes its angular end 49 to cam the clutch-control lever 26 downward so that its lower end assumes the position shown in Fig. 3. During this downward movement, lever 26 actuates the twopart lever H3, swinging same clockwise about its pivot H4 so that the face 123 thereof moves into the path of arm lug HI. By thus blocking movement of arm H0, 2. tabulating operation is prevented, although the depression of the tab-- ulator key has swung latch lever 65 clear of arm 65. The effect of this blocking of arm H8, operating through shaft 64, arm 63' and link 62, is to prevent the bail frame 51 from rocking counterclockwise, thus preventing the rise of any of the tabulator reeds 54. In that the operation of this train of mechanism is necessary to initiate any tabulating operation, the blocking of same as described prevents a tabulating operation from occurring, whether it be initiated by the decimal tabulator keys or the palm key.

The face I24 on lever H3 obviates the chance of the lug IH becoming caught in back of face I 23, in the event that the motor switch 35 should be turned off immediately after a tabulating operation has begun. In such instance the C- shaped arm HI] will have swung rightward so that its lug III has moved past the face I23 While the two-part lever H3 is still in the Fig. 2 position. Turning the motor switch off at that instant and thereby rocking lever H3 toward the Fig. 3 position would bring the lug of face I23 up in back of the lug Ill, where it would obstruct the subsequent return of arm Hii. It will be seen that the provision of the face I24 prevents this condition from arising. That is, as lever H3 swings clockwise, its face I24 will engage the lower edge of lug Ill. The blocking of lever H 3 at face I24 in this manner will cause said lever to yield, by further tensioning spring H'I, which condition will prevail until the return of the C-shaped lever H to its normal position will move its lug off face I24 and allow the lever part H3 to snap into its normal position by spring H1. The face I23 of lever H3 will thus move into abutting relation with the lug III of arm H0.

Although the invention is described as embodied in a decimal or denominational tabulating mechanism, having therefore a plurality of keys and corresponding reeds, it will be understood that the invention is also advantageous in column tabulators having only a single key and tabulator reed. In fact, the tabulator mechanism herein set forth as controlled by the palm tabulator key is in effect a column tabulator mechanism. while it is desirable to employ a reed-selecting mechanism based on the permutation principle as herein described, the selection of said reeds may be effected by conventional means, that is, by a train of mechanism for each decimal tabulator key, individually connecting said key to the corresponding reed, as also set forth in the Yaeger patent.

What is claimed is:

1. In a typewriter tabulating mechanism, a plurality of reeds each projectable to a position for arresting the carriage in a tabulating run, spring means to project said reeds, means in cluding keys to selectively release said reeds for projection, means including a motor for powerretracting the projected reeds, said retracting means including a movable member normally obstructing projection of said reeds, control means for said motor including an element movable to on and off positions, and means, rendered effective upon movement of said control element to off position, to obstruct operation of said retracting means and thereby hold its member in the reed-obstructing position preventing effective projection of said reeds while said control element is in the off position. I

2. In a typewriter tabulating mechanism, a plurality of reeds each projectable to a position for arresting the carriage in a tabulating run, spring means to project said reeds, means common to all of said reeds and including a motor for power-retracting the projected reeds, means normally blocking operation of said retracting means, key-operated means to selectively release said reeds for projection and disable said blocking means, control means for said motor includ- It will also be understood that,

ing an element movable to on and off positions, and means effective upon movement of said control element to the off position to prevent operation of said power-operated retracting means although released by disablement of said blocking means.

3. In a typewriter tabulating mechanism, a plurality of reeds each projectable to a position for arresting the carriage in a tabulating run, spring means to project said reeds, a bail frame common to all of said reeds and normally disposed to retain said reeds retracted and adapted to be displaced incident to projecting a reed, power means including a motor and an operating train to said bail frame to rock said frame and thereby retract the projected reed, control means for said motor including an element movable to on and off positions, a device normally free of and adapted to obstruct operation of said operating train, and means effective upon moving said control element to the ofi position to cause said device to obstruct the operating train and thereby prevent projection of said reeds by retaining the bail frame in its normal position.

4. In a typewriter tabulating mechanism, a plurality of reeds each projectable to a position for arresting the carriage in a tabulating run, spring means to project said reeds, means including a set of keys to releasably retain said reeds retracted and selectively release said reeds for projection, a bail frame common to all of said reeds and normally disposed to retain said reeds retracted and adapted to be displaced incident to projecting a released reed, power means including a motor and an operating train to said bail frame to rock said frame and thereby retract the projected reeds, means normally blocking operation of said operating train and rendered inefiective by operation of said keys, control means for said motor including an element movable to on and off positions, a device normally free of and adapted to obstruct operation of said operating train, and means effective upon moving said control element to the off position to cause said device to obstruct the operating train although the latter is released by disabling the blocking means.

.5. In a typewriter tabulating mechanism, a. tabulator reed urged to project to a position for arresting the carriage in a tabulating run, releasable means to retain the reed retracted, a key-operable device normally blocking said retaining means and effective upon operating said key to release the retaining means and thereby release the reed for projection, said retaining means, upon being reversely operated after release, being adapted to retract the projected reed, power means including a motor to reversely operate said reed-retaining means and thereby retract the projected reed, control means for said motor including an element movable to on and off positions, and means, effective with said control element in the off position, to obstruct the reed-releasing action of said reed-retaining means.

WALTER. T. SAGNER.

Tholstrup Sept. 2, 1941 Yaeger Sept. 4, 1945 Number

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