US2778569A - Split clearing mechanism - Google Patents

Description

Jan. 22, 1957 w. BRUGMAN ET AL SPLIT CLEARING MECHANISM Filed June 26, 1953 3 Sheets-Sheet l INVENTORS Zazurezzce W firlzgman Jan- 22, 1957 L. w. BRUGMAN ET AL 2,778,569

SPLIT CLEARING MECHANISM 3 Sheets-Sheet 2 Filed June 26, 1953 INVEN TORi' Lawrence W Brag/710i? Fay/220124 f. Koch on/ Um &

Jan. 22, 1957 w, BRUGMAN ETAL 2,778,569

SPLIT CLEARING MECHANISM Filed June 26, 1953 3 Sheets-Sheet 3 I09 fi5 IN V EN TORSI lawrence H4 Brag/nan United States Patent SPLIT CLEARING MECHANISM Lawrence W. Brugman, Chicago, and Raymond F. Koch, Evanston, Ill., assignors to Felt & Tarrant Mfg. Co., Chicago, 111., a corporation of Illinois Application June 26, 1953, Serial No. 364,362

3 Claims. (Cl. 235144) This invention relates in general to calculating machines, and more particularly to split clearing mechanism for multidenominational order accumulators having in each order a numeral wheel driven by an actuator through a gear train, including a tens carrying gear, a carry winding spring which is wound up by the carrying gear to effect tens transfers, and detent means normally engaging the gear train to prevent reverse actuation thereof by the tensioned carry winding spring, together with zeroizing means selectively operable to disengage all of the detent means to permit the carry winding springs to unwind to return all of the numeral Wheels to zero position to clear the accumulator.

A principal object of the invention is to enable such machines to be used selectively either for normal operations employing the full capacity of the accumulator for single totals, or for sectional accumulator operations in which one portion of the accumulator is used for calculations and another portion is used for accumulation of the calculations which were performed in the first portion, by providing novel detent engaging means in certain of the orders of the accumulator as a part of the zeroizing means, and selectively operable control means movable from a first to a second position to cause movement of the detent engaging means to an inoperative position to prevent disengagement of the detent means and consequent clearing of the accumulator in those certain denominational orders in response to subsequent operation of the zeroizing means.

Another object of the invention is to enable immediate clearing of the accumulator in those certain denominational orders merely in response to subsequent return movement of the selectively operable control means from its second to its first position, which is accomplished by so constructing the control means that it may be moved at will between its first and second positions at any time, whereby movement thereof back to its first position, fol lowing operation of the zeroizing means and before any subsequent digital actuation, will disengage the detent means in those certain denominational orders to clear that portion of the accumulator.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, when taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

in the drawings:

Figure 1 is a top plan view of the forward portion of a calculating machine embodying the instant invention;

Fig. 2 is a plan view similar to Fig. l with the machine casing removed and parts broken away to more clearly illustrate the invention;

Fig. 3 is a side view of the forward part of the machine, as seen from the right side thereof and with parts of the machine omitted, showing a column actuator in normal rest position and the bail of the zeroizing mechanism held in its forward accumulator-releasing position;

2,778,569 Patented Jan. 22, 1957 Fig. 4 is a side view similar to Fig. 3 showing a column actuator in key-actuated position and the zeroizing bail returned to its rearward position as a result of digit key actuation;

Fig. 5 is a detail plan view of a portion of the zeroizing mechanism showing the same in its forward accumulatorreleasing position and the split clearing mechanism arranged for normal machine operations;

Fig. 6 is a detail plan view similar to Fig. 5 with the split clearing mechanism arranged for split or sectional operations of the machine;

Fig. 7 is a detail plan view of the zeroizing hail of the preceding figures;

Fig. 8 is a plan View similar to Fig. 7 of a modified form of zeroizing bail; and

Fig. 9 is a plan view similar to Fig. 5 showing a modified form of split clearing slide mounted upon the bail of Fig. 8.

Referring more particularly to Figs. 1-4, inclusive, reference' numeral 54 (Figs. 1, 3, and 4) indicates in general the casing of a multi-denominational order calculating machine embodying the instant invention incorporated with a well-known type of actuating mechanism and accumulator, such as those illustrated and described in detail in U. S. Letters Patent No. 2,291,853, issued August 4, 1942, No. 2,356,714, dated August 22, 1944, and No. 2,646,927, issued July 28, 1953. While the machine of these patents is of the key-operated type, it will be apparent from the following description that the instant invention is susceptible of use in other types of calculating machines. The actuating and accumulating mechanism of the instant machine is substantially duplicated in each of the several denominational orders, and the latter are supported and separated from each other in well-known manner by a plurality of vertical frame plates 58 (Fig. 2). Each denominational order of the accumulator comprises a numeral wheel 10 mounted for rotation on a transverse shaft 11 which extends through the several frame plates 58, and a numeral wheel pinion 12 also rotatably mounted on the shaft 11, secured in suitable manner to the numeral wheel and adapted to be rotated by an actuator rack 13 (Fig. 3 and 4). The accumulator also includes in each denominational order a numeral wheel driving gear train comprising, in addition to the pinion 12, a gear 15 meshing with the pinion 12 and rotatably mounted upon a transverse shaft 14, a carrying gear 27 rotatably mounted on a transverse shaft 26 and meshing with the gear 115, for winding up a carry winding spring 28, and a gear 29 (Fig. 2) also rotatably mounted on the shaft 26. The carry winding spring 28 is freely coiled about shaft 26 and is connected at one end to a pin 32 secured to, and extending laterally from, the gear 27, and is connected at its other end to a similar pin 33 extending laterally from the gear 29. Accumulative actuation of gear 27 will tend to rotate gear 29 through the agency of the carry winding spring 28 under the control of the transfer mechanism more specifically illustrated and described in said Patent No. 2,291,853. A complete rotation of numeral wheel pinion 12 results in degrees of rotation of gear 27, and a comparable rotation of 180 degrees is imparted to gear 29. Such rotation of the gear 29 is imparted to the numeral wheel in the next higher denominational order as a single increment of rotation thereof by means of a gear 34 (Fig. 2) meshing with gear 29 and mounted for rotation on shaft 14. One or the other of a pair of diametrically opposed transfer pins 37 extending laterally from the gear 34 through a suitable aperture in the frame plate 58 is adapted to engage and incrementally rotate a slotted wheel 38 rotatable on shaft 11 and secured to the numeral wheel pinion 12 in the next higher denominational order. Each time any numeral wheel pinion 12 is given one complete revolution from its initial zero position, a tens transfer into the next higher order thus is effected by spring 28 under control of well-known escapement mechanism, as illustrated in Fig. 3 of Patent No. 2,291,853. Such transfer operations are well understood in the art. This particular mechanism for accomplishing the same is that specificaly described in said Patent No. 2,291,853, the reference numerals hereinbefore employed being the same as those used to designate the same parts in that patent. Such tens transfer mechanism may be designed for operation in either a decimal or non-decimal system, the present commercial embodiment thereof illustrated herein in Fig. 1 being specifically designed for the British monetary system. It will be understood, of course, that the mechanisms of the eight highest denominational orders illustrated in Fig. l are designed to transferttens, and it is with this decimal system that the present invention primarily is concerned.

As is also illustrated and described in detail in Patent No. 2,291,853, detent means are provided for normally preventing unwinding of the carry winding springs 28. In that patent this means takes the form of a detent pivotally mounted on a transverse shaft and resiliently maintained in engagement with the numeral wheel pinion at its rear end by a coil spring in each denominational order of the machine. Upwardly extending projections on the detents are adapted to be moved forwardly by a swinging movement of a zeroizing yoke or bail which extends transversely across the machine and i pivotally mounted on each side thereof. Forward swinging of the bail acting upon all of the projections results in lifting of the rear ends of all of the detents from engagement with their numeral wheel pinions to permit the carry winding springs to unwind to zeroize or clear the accumulator by returning all of the numeral wheels to their zero positions.

In the present commercial structure in which the accumulator mechanism of Patent No. 2,291,853 has been incorporated, this numeral wheel pinion detent, which is designated by reference numeral 39, has been modified to make the same in effect a two-part member which is best illustrated herein in Fig. 2 as comprising the detent 39 and a substantially U-shaped lever 61. Upward projections 41 are formed on the leg portions of this U-shaped member. the leg portions extending from front to rear of the machine. As best seen in Fig. 3, these leg portions of member 61 are pivotally mounted upon the transverse shaft 20, and each detent 39 is pivotally mounted intermediate its ends at 62 (Fig. 2) to the left leg of its associated U-shaped member 61, the forward end of detent 39 being disposed below the transverse portion of member 61. The right leg of each U-shaped member 61 terminates rearwardly in an off-set end normally held in contact with a transverse pin 63 (extending from the asso ciated frame plate 58) by the spring 40, which is interconnected between this leg of member 61 and the pin 63'. Thus forward swinging of a transverse bail 42, which is pivotally mounted at each side of the machine 43, will act against the upward projections 41 on the U-shaped members 61 to rotate all of the latter in a counterclockwise direction, as seen from the right side of the machine, about shaft 20 and against the action of springs 40. The transverse portion of each of the U-shaped members 61 thereby will be carried forwardly and downwardly to impart such swinging movement to each associated detent 39 to lift the rear end thereof from its position of Fig. 4 out of engagement with the associated numeral wheel pinion 12 to its accumulator releasing position of Fig. 3. In order to insure uniform movement of all of the detent members 39, 61 and to guard against any adverse affect that any possible slight twisting of bail 42 might cause because of its length, a two-part aligning shaft 64 has been extended transversely of the machine through suitable apertures in the legs of all of the U-shaped members 61.

This forward swinging of the transverse bail 42 about 4 its pivot 43 from its position of Fig. 4 to that of Fig. 3 is accomplished by a cam bail 65 having leg portions at opposite sides of the machine pivotally mounted by means of a transverse rod 66 which extends through, and is suitably journalled in, the frame plates 58 and auxiliary end frame members 67 (Fig. 2). The left end of rod 66 may be retained against lateral movement by being upset against a spacer collar 68. The transverse portion of bail 65 extends completely across the machine below the several orders of actuating mechanisms, and the forward ends of each of its arm or leg portions engage against rollers 69 rotatably mounted adjacent the upper ends of the vertical leg portions of bail 42 (Figs. 2, 3, and 4). The right-hand end of rod 66 terminates in a flatted portion (Figs. 3 and 4) extending through similarly shaped apertures in the right arm of cam bail 65 and the lower end of a bail actuating or zeroizing lever 71. This right-hand end of rod 66 is upset against the lever 71 to insure any movements of lever 71 being imparted to cam bail 65. A suitable finger piece 72 is mounted upon the upper end of the lever 71, and the latter has a rearwardly extending nose 73 which cooperates with a laterally extending shelf 74 provided on a lever 75. A spring 76 is loosely coiled about the outer end of a transverse shaft 77 with one end thereof engaging against a suitable transverse projection on the end frame plate of the machine (not shown) and its other end engaging against the forward edge of lever 71 to urge the latter and the cam bail 65 in a clockwise direction (viewing Figs. 3 and 4) about rod 66 as a pivot. The lever 75 is pivotally supported at its rear end on the outer end of a transverse shaft 73 and is urged in a clockwise direction, as seen from the right side of the machine, by a spring 79 coiled about this shaft with its ends underlying, respectively, the shelf 74 and a lateral projection 81 of the right-hand frame plate of the machine. The forward end of lever 75 is connected to the upper end of an arm 82 by a suitable pin and slot connection. The lower end of arm 82 is secured in any suitable manner to a comb or bail 83 extending transversely of the machine, having upwardly extending arms disposed in each denominational order thereof, and pivotally mounted on a transverse shaft 84.

With these parts in their position of Fig. 4, the nose 73 of zeroizing lever 71 is maintained against the upper surface of shelf 74 by spring 76 to retain lever 75 in a lower position and, through the agency of arm 82, to maintain transverse comb 83 in a rearward position. Forward movement of zeroizing lever 71 from this position of Fig. 4 (to the left therein), through the application of manual force to the finger piece 72, removes the nose 73 from blocking engagement with shelf 74 to permit spring 79 to lift lever 75 and rotate comb 83 to its forward position of Fig. 3. Such forward movement of zeroizing lever 71 also swings cam bail 65 from its raised position of Fig. 4 downwardly to cause its upper ends to cam the Zeroizing yoke or bail 42 forwardly from its position of Fig. 4 to that of Fig. 3, through the agency of the rollers 69, to lift the rear ends of detents 61, 39 out of engagement with the numeral wheel pinions 12 to effect a clearing of the accumulator, as previously described. Such forward movement of the zeroizing lever 71 is limited by contact of its forward edge with the shaft 77, and this limits downward movement of the forward ends of cam bail 65 to prevent disengagement thereof from the rollers 69. Between such extreme downward position of the forward ends of bail 65 and the intermediate position thereof illustrated in Fig. 3, rollers 69 are not displaced by Virtue of the particular shape given the forward cam ends of bail 65. Consequently, release of the finger piece 72 following a zeroizing action of lever 71 will result in spring 76 returning the zeroizing lever and bail 65 to their position of Fig. 3, wherein further rearward movement of lever 71 is prevented by the rear edge of nose 73 contacting the forward edge of the shelf 74, and in that position the forward ends of cam bail 6S retain zeroizing bail 42 in its forward position to maintain detents 39, 61 in their inoperative or accumulator releasing position. In response to any subsequent digital actuation of the accumulator, the comb 83 is returned to its rearward position of Fig. 4 against the action of spring 79, in the manner now to be described, which releases zeroizing lever 71 for rearward movement by spring 76 to its position of Fig. 4. The resulting lifting of the forward ends of cam bail 65 permits springs 49 to return detents 61, 39 from their inoperative position of Fig. 3 to their operative or accumulator engaging position of Fig. 4, and such movement of the detents 61 about shaft 20 will swing the Zeroizing bail 42 rearwardly on its pivot 43 to its position of Fig. 4.

The accumulator actuating mechanism, which is similar in construction and operation to that illustrated and described in detail in Patent No. 2,356,714 and the same as that of Patent No. 2,646,927, briefly comprises means, disposed in each denominational order of the machine operable in response to depression of any one of a plurality of digit keys 85 to raise the actuator rack 13 a corresponding distance from its normal position of Fig. 3, and thereafter to engage the same with the associated numeral wheel pinion 12. Upon release of the actuated digit key, this actuating mechanism rotates the associated numeral wheel a digitally corresponding incremental amount, and moves the rack 13 out of meshing engagement with the pinion 12 to its position of Fig. 3. Each digit key 85 is mounted upon the upper end of a key stem 86 which is provided with a lateral extension or shoulder 87 adapted to contact and depress a driving bar 88. Actuation of the different keys 85 in each order will depress the driving bar 88 different distances in wellknown manner and as fully described in Patent No. 2,646,927, so that complete depression of the 1 key will effect movement of the driving bar 88 downwardly one-ninth of the distance through which it will be moved in response to complete depression of the 9" key. Like the driving bar designated in Patent No. 2,356,714 by reference numeral 26 and in Patent No. 2,646,927 by 27, this driving bar 88 is mounted for vertical movement substantially parallel to itself, which is employed to lower the actuator rack 13 in the following manner. A bracket 89 secured to the driving bar 88 (Fig. 3) is pivotally connected to the upper end of a T-shaped lever 91 pivotally mounted on the transverse shaft 77. This lever 91 is the same as the T-shaped member 37 in Patent No. 2,646,927. The lower and normally rearwardly extending arm of this lever 91 (broken away in Fig. 3) is connected to a stop bar which is not illustrated herein but is identical to the bar designated in Patent No. 2,646,927 by reference numeral 43, and this arm of lever 91 also is connected to the forward end of an actuator spring identical to the spring 85 of said patent. The forward and downwardly extending third arm of the T-shaped lever 91 is pivotally interconnected by a link 92 to the central portion of a bell crank lever 93 by a laterally extending lug 90, the upper arm of the bell crank lever 93 being pivotally supported at its upper end on a transverse shaft 94. The lower and rearwardly extending arm of this bell crank lever 93 is provided with a cam roller riding in a cam slot 95 in an actuator arm 96 which carries the actuator rack 13 at its forward end. The rear end of arm 96 is rotatably supported at 97 in a depending U-shaped part 98 which is pivotally supported at its upper end on the transverse shaft 78. This U- shaped part 98 is identical in function to the U-shaped part 71 in Patent No. 2,646,927. During all but the last increment of downward or upward movement of any associated digit key 85, the U-shaped part 98 is prevented from movement to maintain the pivot 97 stationary by the transversely extending end of a lever 99 which protrudes laterally through an L-shaped aperture 101 in a rearward extension of the lower end of one of the legs of the U-shaped part 98. Consequently, all but the final increment of downward movement of any associated digit key stem 86 will be transmitted by the driving bar 88, lever 91, link 92, and lever 93, into upward rotation of actuator arm 96 about the then stationary pivot 97 to raise the actuator rack 13 a distance corresponding to the digital value of the key depressed. The final increment of depressive movement of any associated digit key depresses the end of lever 99 into the horizontal portion of the L-shaped aperture 101 from its position of Fig. 3 to that of Fig. 4 in the manner fully described in Patent No. 2,646,927, which permits the actuator spring that has been further tensioned during depression of the digit key to move arm 96 and its actuator rack 13 forwardly in a translational movement into engagement with the associated numeral wheel pinion 12 by swinging the U- shaped part 98 forwardly about its pivot 78. As illustrated in Fig. 4, the 5 digit key has been fully depressed from its normal raised position of Fig. 3 to lift the actuator rack 13 a corresponding distance and engage the same with its numeral wheel pinion 12. Manual release of the depressed digit key results in its spring and the denominationally associated actuator spring returning these parts to their normal position of Fig. 3, all but the final increment of such return movement of actuator rack arm 96 being downward rotation thereof about its pivot 97 to impart the digitally proper degree of rotation to the numeral wheel pinion 12, and the final increment of such movement by the actuator spring swinging the U-shaped part 98 rearwardly about its pivot 78 to disengage the actuator rack 13 from the numeral wheel pinion in a translational movement and permit lever 99 to be spring returned upwardly into the vertical portion of the L-shaped aperture 101. Such actuation of a numeral wheel 18 in response to depression of a digit key 85 is that more specifically described in said Patent No. 2,646,927, and as will be clearly understood by virtue of the preceding description herein, the detent 39 will prevent backward or negative rotation of the numeral wheel by its carry winding spring 28 be cause of engagement of the rear end of the detent with the ntuneral wheel pinion 12 when the actuator rack 13 thus is disengaged from the pinion following each digit key depression and release.

As previously described, following actuation of the 'zeroizing lever 71, the parts remain in their position shown in Fig. 3, wherein the detents 39 are disengaged from the numeral wheel pinions 12 and the comb 83 is disposed in its forward position. Subsequent depression of any digit key 85 results in the Zeroizing mechanism and the detents 61, 39 being returned from their positions of Fig. 3 to those illustrated in Fig. 4 before engagement of the actuator rack 13 with pinion 12. This return movement of these parts is accomplished by the pivot stud engaging against and rearwardly camming the upper end of that finger of comb 83 which is disposed in the denominational order containing the depressed key. The relationship between the upwardly extending fingers of comb 83 and the denominationally associated studs 99 is clearly illustrated in Fig. 3, and such digit key actuation of comb 33 will be clearly understood when it is considered that digit key depression causes rearward swinging of bell crank lever 93 and stud 90 about shaft 94 as a pivot. As previously explained, movement of the comb 83 rearwardly from its position of Fig. 3 to that of Fig. 4 depresses the forward end of lever 75 to permit spring 76 to swing zeroizing lever 71 rearwardly to unblock zeroizing bail 42 and permit the springs 48 to return it and the detents 61, 39 to their positions of Fig. 4.

The present invention comprises the incorporation with the above described old mechanism of novel split clearing mechanism to enable the machine operator selectively to employ the machine either for normal or sectional accumulator operations. Since such operations are effective smas es desired. As will be readily apparent to those skilled in the art, the general purpose of providing split clearing mechanisms is to enable an ordinary machine having a multi-denominational order accumulator to be employed either as a Whole or as one having two or more separate accumulators. Thus sub-totals, for example, may be accumulated in one portion of the machine and grand totals in a different portion thereof, with the latter being retained in. the accumulator following a Zeroizing opera tion to clear the former therefrom. Of course, this is merely illustrative of one possible arrangement for split clearing mechanism. In order for the machine to so function, it is required that selectively operable control means he provided which are normally inoperative and, when rendered operative, will prevent clearing :of a desired portion or portions of the multi-denominational order accumulator in response to operation of the regular zeroizin g means.

In the presently illustrated embodiment of the invention, such split clearing mechanism, as previously explained, is disposed in the four leftmost denominational orders of the machine and the overflow order, and comprises detent engaging means associated with the detents 61, 39 in those denominational orders and selectively operable control means for rendering the same operative or inoperative. In the modification illustrated in Figs. 2 through 7, the zeroizing bail or yoke 4-2 is provided with a plurality of cut-away portions or recesses 102 in the forward edge of its transverse portion spaced laterally from each other and in alignment with the forward ends of the U-shaped levers 61 in such selected orders. Each recess 1132 is of greater width than its associated member 61 and of a depth from front to rear of the machine at least as great as the distance that the front edge of bail 42 moves in a zeroizing operation. Slidably mounted upon the upper surface of the zeroizing bail 42 by means of pin and slot connections 103 is a slide member 104 having its forward edge formed to provide tooth portions 105 spaced laterally from each other and each normally aligned from front to rear of the machine, as best seen in Figs. 2 and 5, with the right-hand leg and its upward projection 11 of one of the detent members 51. The left end of each tooth portion 105 is angularly disposed to provide a cam edge 1%. Intermediate its ends, slide member 1114 also is provided with an upstanding stud 167 which is embraced by the forked or slotted rear end of an arm 108. The forward end of arm 108 is provided with a suitable non-circular aperture receiving the correspondingly shaped lower end of a substantially vertical shaft 1119. The arm 1% thus is mounted on the lower end of shaft 199 for movement therewith and, as best seen in Figs. 3 and 4, is secured thereto in any suitable manner, as by upsetting of the lower end of the shaft. This shaft 109 extends upwardly through a suitable aperture provided in a boss portion 111 of the casing 54 disposed forwardly of the usual numeral wheel sight opening. 1f desired, a suitable spacer and bearing washer 112 may be mounted on shaft 109 and interposed between the lower surface of boss 111 and the arm 1%. A manually operable control member in the form of a leaf spring 113 is provided at its rearward end with a downwardly and reversely bent U-shaped portion 114 having suitable non circular apertures engaged by a correspondingly shaped portion of shaft 1119 adjacent its upper end. The upper end of shaft 109 is threaded to receive a tension adjusting nut 115 and itis preferred that a lock washer 116 be interposed between the'nut 115 and the U-shaped portion 114 of control member 113 to insurethe latter being retained on the non-cincular neck portion of the shaft so as to transmit to the arm 1% movement corresponding to that imparted to control member 113. At its forward end, the control member 113 may be provided with'an upstanding fingerportion 117, and the lower surface of this forward end of member 113 has a rounded protuberance 118 extending downwardly therefrom and adapted to be retained in one or the other of two laterally spaced and correspondingly shaped recesses 119 formed in the upper surface of the machine casing 54. By suitable adjustment :of nut 115 the spring tension thereby imposed upon the manual control member 113 may be varied as desired to insure retention of the control member in either of-two adjusted positions by retaining the protuberance 118m one or the other of the recesses 119. In Fig. 1 the protuberance 11$ is shown as seated in the right-hand recess 119, and the left-hand recess 119 is shown exposed to view. For reasons that will be more fully apparent hereinafter, the detent aligning shaft 64 is split at 121 (Fig. 2) at a point intermediate the detents 61, 39 in the fourth and fifth from the left regular denominational orders of the machine, thus in effect providing one such shaft 64 engaging the five leftmost detents 61 (including that in the overflow order), and another similar shaft 64- engaging the remaining such detents.

Figs. 8 and 9 illustrate a somewhat modified split accumulator mechanism comprising a zeroizing bail 42a and slide member 104a. The bail 42a is provided with an elongated recess 102a in its forward edge of the same depth as the cut-away portions or recesses 102 in bail 42 and equal in length to the distance between the outer sides of the outermost said recesses 102. The slide 104a also is mounted upon bail 42a with pin and slot connections,- but these differ from the pin and slot connections 103 of the previously described modification in that the slots 1031) (Fig. 9) function as cam slots in cooperation with the studs 103a and are angularly disposed so that movement of the slide 104a to the right in Fig. 9 relative to bail 42a from its full line to its broken line position of that figure results in the slide being moved rearwardly to carry its forward edge from its normal position in alignment with the forward edge of bail 42a to a second or inoperative position in substantial alignment with, or disposed rearwardly of, the rear wall of recess 102a. Movement of slide 104a relative to bail 42a between these two positions is accomplished by the selectively operable control member 113 through the agency of a modified arm 108a, mounted on shaft 109 like arm 103, and one or the other of a pair of studs 122 spaced laterally from each other and secured in upstanding position on the slide 104a. The rear end of arm 108a is reduced in width to be disposed between these studs 122, and the latter may be formed as L-shaped brackets, with the base of the L secured to slide 104a and extending outwardly away from the center of the slide and the vertical edges of their inner arm-contacting surfaces preferably rounded off. The central portions of these vertical surfaces of studs 122 are of sufficient depth from front to rear of the machine to insure operating contact therewith by arm 108a in any of their four possible positions, i. e., as shown in full lines in Fig. 9, when moved directly rearwardly thereof with bail 42a to its broken line position, when moved to the right and rearwardly to their broken line position 122a in response to movement of arm 108a to' its broken line position 1118b of Fig. 9, or when moved directly rearwardly from such last described position 122a by return therefrom of bail 42a to its inoperative position of Fig. 4.

Inv Fig. 2, zeroizing bail 42 is illustrated in its re tracted or inoperative position, and slide member 104 is shown in its normal or leftmost position. The manual 9 control means 108, 113 for this split accumulator slide 104 is shown in its first position, also illustrated in Figs. 1 and 5, wherein the split accumulator clearing mechanism is arranged for normal machine operations. The slides 104 and 104a are illustrated in full lines in these same normal or leftmost positions in Figs. 5 and 9. In Fig. 5, however, zeroizing bail 42 and detents 61 are illustrated in full lines in their forward accumulator releasing or zeroized positions, their broken line positions therein illustrating the rearward position of bail 42 and the operative positions of detents 61, 39, wherein the latter engage the several accumulator gear trains to prevent reverse actuation thereof by the carry winding springs 23. In Fig. 6, the arm 108 of the split accumulator control means is shown in its second position wherein it has moved slide 104 to its rightmost or inoperative position to condition the machine for sectional accumulator operations. Since the bail 42 is shown in Fig. 6 in full lines in its forward accumulator releasing or zeroized position, those detents 61 in all but the four leftmost regular orders and the overflow order of the machine have been engaged by its forward edge and swung forwardly to move the detents 39 to accumulator releasing position. Since the slide 104 is in its second or inoperative position, however, the detents 61 in the four leftmost orders and the overflow order remain in their rearward or operative position, the same as in Figs. 2 and 4, which prevents clearing of those orders of the accumulator despite the movement of the zeroizing lever 71 to elfect zeroizing of the remaining orders of the accumulator in response to movement of bail 42 to this full line position of Fig. 6. Correspondingly, all orders of the accumulator will be cleared in response to operation of zeroizing lever 71 and forward swinging of bail 42a in the modification of Figs. 8 and 9 if the zeroizing control member 113 is in its position of Fig. 1, since slide 104a then will be in its first or effective position shown in full lines in Fig. 9. If this slide 104a had been in its second or inoperative broken line position of Fig. 9 prior to operation of the zeroizing lever, however, those orders of the accumulator having their detents 61 aligned with the recess 102a would not be cleared. In the event of such arrangement of the selectively operable control means 113 to set the machine for split accumulator clearing operations, actuation of the zeroizing control lever 71 and subsequent return of the selectively operable control means 113 to its first position of Fig. 1, before any intervening depression of a digit key 85, will result in all of the detents 61, 39 that had remained in engagement with their associated accumulator gear trains being disengaged therefrom, solely by such movement of control member 113, to clear such orders of the accumulator. This will be effected in response to the resulting forward movement of slide 104a relative to bail 420 from its broken line to its full line position of Fig. 9. Similarly, in the event of the machine having been arranged for split accumulator clearing operations with the mechanism of Figs. 1-7, and the zeroizing lever 71 having been actuated to move the bail 42 and slide 104 to their full line positions of Fig. 6, subsequent return of slide 104 to its first or leftmost position of Fig. 5, before depression of any digit key 85, will cause the several cam edges 106 to act upon the associated projections 41 on the right legs of detents 61 to swing the latter from their operative position of Fig. 4 to their accumulator releasing position of Fig. 3. It will thus be seen that setting of the selectively operable control member 113 to its first posi tion of Fig. 1 will arrange the machine for normal operations, including clearing of the entire accumulator in response to actuation of the zeroizing lever finger piece 72. Setting of the control member 113 to the left in Fig. 1 to its second position, however, will arrange the machine for split accumulator clearing operations, wherein subsequent actuation of finger piece 72 will eifect clearing only of the right-hand portion of the accumulator, and any values contained in the left-hand portion thereof will be retained therein. Following such a zeroizing action, the left-hand portion of the accumulator may be cleared merely by manually returning control member 113 to its first position of Fig. 1. It should be noted that the selectively operable control means 108-419 for the instant split accumulator mechanism is readily removable with the cover or casing 54 as a unit, and replaceable therewith, because of the freely separable connection between the slotted rear end of arm 108 and pin 107 and between arm 108a and studs 122. In such replacement, the operator need only ascertain in which of the two possible lateral positions slide 104 or 104a is disposed and first correspondingly set the control member 113, whereupon replacement of the casing will result in proper engagement between pin 107 and arm 108 or studs 122 and arm 108a.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts Without departing from the spirit and the scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

We claim:

l. In a calculating machine having a multi-denominational order accumulator with a numeral wheel, a numeral wheel driving gear train including a carrying gear, and a carry winding spring in each order; an actuator for said accumulator including an actuating member for driving each said gear train to cause the carrying gear therein to Wind up its associated carry winding spring; detent means normally engaging each said gear train to prevent reverse actuation thereof in response to unwinding of the associated carry winding spring; and zeroizing means selectively operable to disengage all of said detent means from said gear trains to permit said carry winding springs to unwind to return all of said numeral wheels to zero position to clear said accumulator; detent engaging means associated with said detent means in certain of the orders of said accumulator and comprising part of said zeroizing means, and selectively operable control means movable from a first to a second position to cause movement of said detent engaging means to an inoperative position to prevent disengagement of said detent means in said certain orders in response to subsequent operation of said zeroizing means, and movable from said second back to said first position, after operation of said zeroizing means, to cause movement of said detent engaging means to disengage the detent means in said certain orders from their associated gear trains to effect immediate return of the numeral wheels in said certain orders to Zero position.

2. In a calculating machine having a multi-denomination-a1 order accumulator with a numeral wheel, a numeral wheel driving gear train including a carrying gear, and a carry winding spring in each order; an actuator for said accumulator including an actuating member for driving each said gear train to cause the carrying gear therein to wind up its associated carry winding spring; a detent normally engaging each said gear train to prevent reverse actuation thereof in response to unwinding of the associated carry winding spring; zeroizing means selectively operable to disengage all of said detents from said gear trains to permit said carry winding springs to unwind to return all of said numeral wheels to zero position to clear said accumulator, including a bail extending transversely across the machine and movable from a rearward to a forward position for engagement with certain of said detents to disengage the same and having cutaway portions adjacent the remaining said detents to prevent disengagement of the latter thereby, and a slide member mounted on said bail for movement relative thereto and having tooth portions normally overlying said cut-away portions for engagement with said remaining detents in response to movement of said hail from said rearward to said forward position to disengage said remaining detents; and a control member operatively associated with said slide member to effect movements thereof between said normal position with said tooth portions overlying said cut-away portions and an inoperaposition when said bail is disposed in either said rearward or said forward position.

3. In a calculating machine having a multi-denominational order accumulator with a numeral wheel, a numeral wheel driving gear train including a carrying gear, and a carry winding spring in each order; an actuator for said accumulator including an actuating member for driving each said gear train ,to cause the carrying gear therein to wind up its associated carry winding spring; a detent normally engaging each said gear train to prevent reverse actuation thereof in response to unwinding of the associated carry winding spring; zeroizing means selectively operable to disengage all of said detents from said gear trains to permit said carry winding springs to unwind to return all of said numeral wheels to zero position to clear said accumulator, including a bail extending transversely across the machine and movable from a first to a second position for engagement with certain of said detents to disengage the same and having cut-away portions adjacent the remaining said detents to prevent disengagement of the latter thereby, and a slide member mounted on said bail for lateral movement relative thereto and having tooth portions normally aligned with said cutaway portions for engagement with said remaining detents in response to movement of said bail from said first to said second position to disengage said remaining detents; and a control member operatively associated with said slide member to effect lateral movements thereof between said normal position with said tooth and cutaway portions aligned and an inoperative position when said bail is disposed in either said first or said second position.

References Cited in the file of this patent UNITED STATES PATENTS 2,291,853 Webb Aug. 4, 1942 2,356,714 Webb Aug. 22, 1944 2,422,103 Lambert June 10, 1947 2,599,257 Heitlinger June 3, 1952 2,656,110 Niemann Oct. 20, 1953

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