US2229771A - Cash register - Google Patents

Description

Jan. 2s, 1941. p, SBURLINO ET AL 2,229,771

CASH REGISTER Filed Sept. 7, 1935 2 Sheets-Sheet l J1/1112111( om Pascal Sburlino and Joh H. Gruver Theil @Hoz au Jan- 28, 1941- P. SBURLINO ET AL 2,229,771

CASH REGI STER Filed Sept. '7, 1935 2 Sheets-Sheet 2 13| Snoentow 92 30 Pascal Sburlino and John H. Gruver By Mm Their Cforneg Patented Jan. 28, 1941 UNITED STATES PATENT OFFICE CASH REGISTER land Application September '7, 1935, Serial No. 39,524

15 Claims.

This invention relates generally to cash registers and accounting machines and, more particularly, to the diierential mechanism employed therein. It is shown applied to a machine of the type shown and described in Letters Patent of the United States, No. 1,619,796, issued to B. M. Shipley on March l, 1927, and reference may be made thereto for a complete description of this machine.

An object of this invention is to provide a novel diierential mechanism for an overflow bank adapted to print and indicate data during adding operations, without adding the data into the totalizer wheels, and adapted to be controlled by the totalizer element during read and reset operations whereby the totals are printed and indicated.

Another object of this invention is to provide two differentially movable members, which are driven by a common driver, with. a coupling means intermediate said members, which coupling means is rendered eiective or ineffective under control of the total lever depending upon the position of the same.

Another object of this invention is to produce a novel differential mechanism including a plurality of differentially adjustable members one of which is adapted to control printing and indieating under control of a bank of keys and the 0 other adapted to control the printing and indicating as determined by the totalizers of the machine.

With these and incidental objects in view, the invention includes certain novel 'features of construction and combinations of parts, the essential elements of which are set forth in appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

Of said drawings:

Fig. 1 is a side elevation of an improved differential mechanism, showing a bank of print keys associated therewith.

Fig. 2 is an enlarged detail side view oi the coupling mechanism and the means for uncoupling the same.

Fig. 3 is a side view of a portion of the adjustable control means, shown in add position, in which position it adjusts means for uncoupling the coupling mechanism.

Fig. 4 is a side view of the transfer mechanism, together with a portion of the coupling mechanism.

It is customary in machines of the type referred to herein to provide one or more differential units and corresponding overflow totalizer wheels in excess of the number of rows or banks of amount keys, the additional dierentials serving as carrying mechanisms between the totalizer wheels corresponding with the individual rows or banks of keys, and the overflow totalizer wheels for which no corresponding banks of keys are provided.

The p-resent invention contemplates the use of a row or bank of keys corresponding to the overflow totalizer wheels, together with a novel diierential mechanism, which mechanism is adapted to control the printing and indicating of data during adding operations, without adding the data into the totalizer wheels, and adapted to be controlled by the totalizer elements during read and reset operations whereby the totals are printed and indicated.

While only one diierential, together with associated bank of keys, is illustrated and described herein, it is to be understood that as many of such diiierentials,y together with corresponding banks of keys, as may be desired may be used in the machine, depending upon the number of overflow Wheels desired and the number of banks of keys for indicating and printing data during adding operations, without adding such data into the totalizer wheels.

For the convenience of illustration, and to better disclose the usefulness of the present invention, a bank or row of keys 3@ (Fig. 1) is shown in connection with the diierential mechanism associated therewith.

Keyboard The keyboard of the machine comprises a plurality of banks or rows of keys 30 (Fig. 1) slidably mounted in frames 3l supported on cross rods 32 and 33 extending between the side frames 45 (only one being shown) of the machine. When a key 3l! is depressed, a Zero stop pawl Sil is moved in the usual manner toits ineffective position, the depressed key and zero stop pawl being held in their moved positions by means which is fully illustrated and described in the above mentioned patent, and therefore it is not shown or described herein. Near the end of the operation of the machine the depressed key and the zero stop pawl are returned to their normal positions by mechanism also disclosed in the above mentioned patent.

Dierential mechanism Associated with the bank of keys Sil is a differential mechanism providedfor the purpose of adjusting indicating and printing mechanisms to record data during adding operations, without adding the data into the totalizer wheels, and adapted to be controlled by the totalizer elements during read and reset operations whereby the totals are printed and indicated. The totalizer wheels associated with this differential mechanism are used during adding operations to Icarry the overflow from the highest order totalizer wheel with which there s associated an amount bank of keys.

'Ihe differential mechanism is mounted between and carried by supporting hangers 4I (Fig. 1) and 48 (Fig. 4) supported on rods 41 and 51 carried by machine side frames 45, only one of which is shown.

To drive the diiferential mechanism a drive shaft (Fig. 1) is provided with a pair of cams 36 and 31 pinned thereto and cooperating with rollers 38 and 39 carried by a Y-shaped lever 40. The lever 40 is pivoted on the hanger 4| and is connected by a link 42 to a driver 43 loosely mounted on a hub 44 carried by the hanger 4|. A rod 45 extends through all differential units and acts as a stabilizer. The shaft 35 receives a complete clockwise rotation at each cycle of operation of the machine, which, through the mechanism just described, rocks the driver 43 a denite distance clockwise and counter-clockwise.

A differentially movable arm (Fig. 2) loosely mounted on the hub 44, carries a latch 5I supported thereon by a bell crank 52 and an arm 53. The latch 5| normally connects the arm 50 to the driver 43 in a well known manner, which is fully illustrated and described in the above mentioned patent. As the driver 43 moves clockwise, the diierentially movable arm 50 is carried with it until the forward end of the bell crank 52 strikes the end of a depressed key 30, whereupon the bell crank 52 is rocked counter-clockwise to disengage the latch 5| from the driver 43. As the latch 5| is thus disengaged, a nose 54 on the latch 5| moves into engagement with one of a series of notches 55, depending upon which key has been depressed, formed in a bar 56 supported at its upper end by the hanger 4| and at its lower end by the rod 41. As the driver 43 returns to its normal position, the differentially movable arm 50 is again returned to its normal position by driver 43 in theusual manner and the latch 5| is returned to driving relation with the driver 43 by the spring 49.

Associated with the differential mechanism is a beam 58 (Figs. 1 and 2) pivoted at one end to the arm 50 and bifurcated at its other end to cooperate with a pin 59 in a link 60. A yroller 6| on the Y-shaped lever 45 brings the upper concave surface of the beam 58 into a position against a hub -on the arm 50. The link 60 is pivoted at its upper end to an indicator adjusting segment 62 carried by one of several nested sleeves on a rod 63 supported in the machine side frames 45, and at its lower end to an arm 64 pivoted on a rod 65 supported by the side frames 45. Fast on the arm 64 is a spiral segment 66 meshing with a spiral gear 51 secured to a shaft 68 mounted in frames 69 and 10.

` The printing mechanism is fully illustrated and described in the above mentioned patent and, therefore, it is not thought necessary to show or describe it in detail here. What is shown consists of a pair of type wheels 16 and 11 which are driven by a gear 'i3 carried by one of several nested tubes 19, each of which carries a gear 80 driven by a rack 8| set by a segment 82 fast to the previously described shaft 63, which, it will be recalled, is driven through the train of mechanism actuated by the beam 58 under control of the keys 30.

The indicating mechanism is fully shown and described in the patent hereinbefore referred to, and therefore it is not shown or described herein. The segment gear 62 serves to adjust the proper indicator, through the link 60 and beam 58, to a position corresponding to the key depressed. Cooperating with the segment gear 62 is the usual form of an aligner 1| carried by a shaft 12.

It can, therefore, be seen from the above that when a key is depressed during an adding operation, through the mechanism heretofore described, there will be indicated and printed data corresponding to the key depressed.

Associated with the differentially movable arm 50 is a differentially movable actuator 89 (Fig. 1) which carries three racks 89, one for each of a plurality of lines of totalizers 99, 9| and 92. The actuator `8|! is normally connected to the arm 50 by means of a coupling pawl 93 (Fig. 2) coacting with a stud 64 in the arm 50. It will thus be apparent that when the main operating shaft 35 is rotated, the actuator 88, through its coupling connection, will move with the differentially movable arm 50.

In most machines of the type herein referred to, the actuator 88 is used, during adding operations, to add amounts :into the totalizer wheels. Inasmuch as the data set up in the bank of keys 30 during adding operations is to be only indicated and printed, without adding into the totalizer wheels corresponding to that bank, such wheels being used on such operations for carrying the overflow from other totalizer wheels, it is necessary that the actuator 88 be disconnected from the arm 50 during such operations. The means for accomplishing this result will now be described.

Cont'roZ of coupling means Like all machines of this type, the present machine is provided with a total control lever 98 (Fig. 3) integral with a nearly circular plate 99 loose on a sleeve |90 on a rod |0| mounted in the usual manner in axial alignment with the rod 46 of the diiferential units. The control lever 98 is movable to various positions of adjustment to control various functions of the machine. The only positions of adjustment of the control lever 98 which are pertinent to the present invention are the add, read and reset" positions, which positions are noted in Fig. 3. The plate V99 is provided with a slot |02 with which cooperates a roller |63 mounted in a lever |04 loosely mounted on a stud |05 carried by a member in the total lever unit shown and described in the Shipley Patent 1,619,796. Also loose on the stud |05 is a lever |06 having a slot |01 into which projects a pin |08 on an arm |09 fast on a shaft ||0.

The movement of the lever 98, either up or down, rocks the lever |64 counter-clockwise through the engagement of its roller |03 with the slot |02. This movement is transmitted to lever |06 through a coil spring supported by projections H2 and ||3 on the levers |04 and |06, respectively, and moves said lever |06 counterclockwise. This movement, through the pin |08, rocks the arm |59 and shaft |0 clockwise.

Fast to the shaft ||0 is a segment gear ||1 (Figs. 1 and 2) meshing with teeth on a cam arm I I8 loosely mounted on the rod 41. The cam arm H8 has a slot |20 coacting with a pin I2| in an arm |22 fast to a shaft |23 carried by the hangers 4| and 48. Also secured to the shaft |23 is a latch |24, which is adapted at times, depending upon the position to which the control lever 98 is set, to coact with a pin (Figs. 1 and 2) on the lower portion of the coupling pawl 93, during an operation of the machine, to uncouple the pawl 93 from the stud 34 on the differentially movable arm 50.

When the total control lever 98 is in its add position, as shown in Fig. 3, the latch |24 is in the path of movement of the pin |25 on the coupling pawl 93 and upon operation of the machine, the inner surface of the latch coacting with the pin |25 will cam the pawl 93 in a counter-clockwise direction about its pivot so that the pawl 93 will be moved out of engagement with pin 94. In this manner the actuator 88 is disconnected from the differentially movable arm 50 during adding operations. The machine is thus conditioned for indicating and printing data during adding operations, without adding such data into the totalizer wheels.

When the total control lever 98 is moved, either upwardly or downwardly, to read or reset position, the slot |02 in the plate 99, through the mechanism heretofore described, rocks the latch |24 out of the path of movement of the pin |25 on the coupling pawl 93. It is, therefore, apparent that when the machine is operated during either read or reset operations, the actuator 88, due to the position of the latch |24, remains coupled to the differentially movable arm 50 and therefore moves with the differentially movable arm 50 during read and reset operations.

When the lever 98 is moved back into add position the slot |02 and pin |03, through the levers |04 and |08, arm |09, shaft ||0, and arms and ||8, effects a movement of the latch |24 back into the path of the pin |25 of the pawl 83 so that during adding operations the actuator 88 will be uncoupled from the differential arm 50.

Transfer mechanism As previously stated, the totalizer wheels corresponding to the row or bank of keys are used Vto carry the overflow from the highest order totalizer Wheels with which there is associated an amount bank of keys. The manner in which such overiiow is transferred is well known in the art, being fully illustrated and described in the abovementioned patent, and therefore it is thought necessary to give only a brief description thereof.

Each totalizer wheel has a long tooth |30 (Figs. 1 and 2) which, when the wheel moves from 9 to O, coacts with a transfer pawl |3| (Fig. 4) and rocks it counterclockwise. This pawl is pivoted on the hanger 48, has an arm |32 cooperating with a stop lever |33 pivoted on the hanger 48, and is in the plane of the totalizer wheel of the next lower order. Rocking of the pawl |3| ccunterclockwise disengages a stud |34 carried by the arm |32 from a shoulder |35 in an opening |36 formed in the stop lever |33, thus causing said stud |34 to move downwardly and rest against the lower edge of said opening. A spring |31 then forces the stop lever |33 in a clockwise direction.

As shown in Fig. 4, the free end of the lever |33 is normally in the path of a square stud |38 xed to a 'lever |39 pivoted to a two-toothed transfer rack |40 pivoted to the actuator 88. Normally, when the parts are at rest, the rack 89 with its transfer rack |40 stand in a position in which the square stud |38 on the rack |40 is held against the free end of the lever |33 by a spring |4| (Fig. l).

If, upon the return movement of the rack 89, is moved clockwise (Fig. 1), while the transfer rack |40 stands still until the rack 80 strikes it, as shown in Fig. 4, thus closing the gap between the two racks. Further clockwise movement of rack 89 moves the rack |40 and stud |38 on lever |39 away from the stop lever |33, thus causing the racks 89 and |40 to constitute, and move as, a single uninterrupted rack.

If, upon the return movementJ of the rack 08, which is then meshing with the totalizer wheels, the stop lever |33 stands in the position where the stud |38 will strike its outer end, the rack |40 is detained, while the rack 89 continues to move, that is, counter-clockwise, thus producing a gap between the two racks 89 and |40, as shown in Fig. 1, and permitting the rack |40 to turn the totalizer wheel only one step to complete the regular addition, all of which is fully illustrated and described in the before mentioned patent. However, if a transfer is to be effected, the long tooth |30 on the totalizer wheel contacts with and moves the trip pawl |3| counter-clockwise, thereby disengaging the stud |34 from the shoulder and causing the stop lever |83, by means of the spring |31, to rock in a clockwise direction thus moving its end out of the path of movement of the square stud |38, which positions a shoulder |44 in the path of the stud |38. The rack |48 then continues to move the full extent with the rack 89, as shown in Fig. 4, and acts to turn the totalizer wheel one more step to turn in a transfer or carry.

The stop lever |33 and transfer pawl |3| are returned to their home positions by means of a three-armed spider |42 (Fig. 4) loosely mounted on the hub of the differential arm 50. The spider |42 carries a stud |43 which extends into the path of a shoulder formed on the driver 43 of the next lower order differential, so that when that driver nears the end of its neXt advance stroke the three-armed spider |42 is turned so as to restore each stop lever |33 and transfer pawl |3| of its respective differential to their home positions. Reference may be made to the before mentioned patent for a full illustration and description of this mechanism.

As there may be three lines of totalizers 9| in the machine as shown in Fig. l, there is a possibility that a transfer or carry may take place in each of them for the same denomination at the same time. When this occurs all three levers |33 are tripped to permit the racks to turn in those carries. It will be recalled that during adding, in the special differential of Fig. 1, the actuator 88 is disconnected from the differential arm and when all three levers |33 are tripped, the actuator could move counter-clockwise, whereupon the studs |38 would all contact the shoulders |44 and remain there. Then when the spider |42 tried to restore the levers 33 the studs |38 would block such restoration and continued forcing of the parts would break some of the mechanism.

Therefore to avoid any such difficulty a retaining pawl |50 (Fig. 4) is pivoted at |3| on the hanger 4 This pawl is held in contact with the stud |25 by a spring |52 which holds the actuator 66 in its proper position thus preventing any injury to the machine parts.

"Read and reset operations When either a read or reset operation is to be performed, the control lever 98 is moved either upwardly or downwardly to the read or reset positions, as shown in Fig. 3. Movement of the lever 66 and the plate 99 integral therewith to either of these positions, through the train of mechanism heretofore described, adjusts the latch |24 so that it is out of the path of movement of the stud |25 carried by the coupling pawl 93 which pawl normally couples the actuator 88 to the diiierentially movable arm 56. As previously mentioned, the latch 21| is used during adding operations to uncouple the pawl 63 from the stud im thereby disconnecting the actuator 86 from the differentially movable arm 56 thus preventing addition of any data into the totalizer wheels.

However, during total printing operations, either read or reset, the coupling pawl 93 is maintained in engagement with the stud 96, whereupon the actuator 68 and differential arm 56 move in unison under control of the totalizer element to set up printing wheels and indicators whereby the amount on the totalizer wheels may be printed and indicated. To accomplish this, of course, it is necessary to disengage the latch from the driver 63 under control of the totalizer wheels themselves.

This mechanism for so disconnecting the latch 5| from the driver is old and well known in the art and therefore it is only partially shown in connection with the totalizer wheel mounted on the rear totalizer line. This mechanism is shown in Fig. 4. It is to be clearly understood, however, that such mechanism is duplicated for each of the totalizer lines and in Fig. 4 it has been shown in connection with the back line instead of the front line for the purpose of clarity, since this mechanism, which is associated with the front totalizer line, as viewed in Fig. 4, would come in front of most of the transfer mechanism there shown.

A brief description of this mechanism will now be given. For a fuller description and illustration thereof reference may be had to the above mentioned Shipley Patent No. 1,619,796 mentioned at the outset of this specication.

Referring particularly to Fig. 4, mounted beneath the spider |62 and its disc |45 is a disc |55 having internal teeth |56. This disc |56 has an arm |51 (Fig. 1) having an opening into which projects a stud |56 carried by the latch supporting bell crank 52.

Pivoted at |59 on the hanger 46 is a lever |60 carrying a pivoted stop pawl 6|, a flange of which is normally held in contact with a pin |62 on the lever |66 by a spring |63. Pivoted to the lever |66 is one of two toggle links |64 carrying a stud |65. Connected to this stud |65 is a second toggle link |66 pivoted to a stop pawl |61 mounted on a stud |68 carried by the hanger 68. Also mounted on this stud |66 is a lever |69, one end of which is bifurcated to engage the stud |65 and the other end carries teeth |16 meshing with a segment |1| secured to a shaft |12 supported by the machine frames.

Normally the parts are in the positions shown in Fig. 4 and when the total lever 96 is moved from its add to either its reset or read position, mechanism fully illustrated and described in the above mentioned Shipley Patent 1,619,796 sets up a condition whereby, upon operation of the machine, shaft |12 is rocked counter-clockwise. When this occurs the lever |69 is rocked clockwise and through its connection with the stud |65 it straightens the toggle links |64 and |66 by rocking stop pawl |61 clockwise. The clockwise rocking of the stop pawl |61 places its nose |13 in the path of the long tooth |30 of its associated totalizer wheel 92. Now, as the totalizer wheel is rotated counter-clockwise by the actuator rack 89, when the long tooth contacts the nose |13 of the pawl |61, the pawl is rocked counter-clockwise and as the links |64 and |66 at this time are in substantially a straight line, they are moved to the left and consequently rock lever |60 clockwise, whereupon the flange of the pawl |6| is moved into the path of the tooth |56, which at that particular time is opposite the pawl. This stops the clockwise movement of the disc |55, it having been so moved by its connection with the stud |58. As it is stopped, it stops movement of the bell crank 52 and causes the same to rock around its pivot and withdraw the latch 5| from the driver 43 in exactly the same manner as the latch is disconnected from the driver when the forward end of the bell crank 52 contacts a depressed key. Therefore the actuator 8B and consequently the differential arm 56, it at this time being coupled thereto by the pawl 93, are both set in a position commensurate with the value of the totalizer wheel so controlling the same. Hence the beam 58 (Fig. 1) through the link 66 sets the indicator and printer accordingly.

It will be clear from the description that during totalizing operations the total lever 98 controls the coupling of the actuator 88 to the differential arrn 56, so that the two are coupled together and operate as a unit to control printing and indicating of amounts taken from the totalizer wheels. On the other hand, the total lever 98 controls the coupling between the actuator B8 and differential arm 56 in adding operations, so that the actuator 38 will be disconnected from the differential arm 56, whereby said actuator may be used solely for the purpose of turning in transfers or carries to the totalizer wheels with which it is associated, whereas simultaneously therewith the dierential arm 56 may control the setting of printing and indicating data under control of the keys associated with this particular diiferential mechanism.

Operation A very brief description will now be given of the operation of the machine insofar as the present invention is concerned. For example, let it be assumed that the machine is used in a business where it is desirable to record the total number of items involved in each separate transaction entered upon the machine, without adding such amount into the totalizer wheels.

The operator moves the total control lever 98 to the add position, in which position the lever, through the train of mechanism heretofore described, positions the latch |24 in the path of movement of the stud |25 on the coupling pawl 93, which pawl normally couples the actuator 88 to the differentially movable arm 50. 'Ihe total number of items involved in the transaction is then set up on one of the keys 30 and the machine operated. It is obvious from the above that when the differentially movable arm 56 starts to move in a clockwise direction, the latch |24 engages the stud |25 on the coupling pawl 93, thereby uncoupling the actuator 88 from the arm 50, thus permitting the arm 50 to move independently of the actuator 88 to adjust the indicating and printing mechanism to record the proper amount, Without adding such amount into the totalizer Wheels, which wheels it Will be recalled are used only as overilow wheels.

Inasmuch as the totalizer wheels associated with the above mentioned bank of keys 30 are used only as overow wheels, it is therefore necessary in performing read or reset operations, in other words, sub-total or total operations, that the actuator 88 remain coupled to the differentially movable arm 50, in order that the totalizer wheels can control the differential to indicate and print the totals standing on the totalizer wheels or reset such wheels to zero, in the same manner as the differentials illustrated and described in the above mentioned patent. Therefore, when it is desired to perform such operations, the operator moves the total control lever 98 to either the read or reset positions, in either of which positions said lever, throughthe train of mechanism previously described herein, positions the latch |24 out of the path of movement of the stud |25, thus permitting the actuator 83 to remain coupled to the diierentially movable arm E when the machine is thus operated.

While the form of mechanism herein shown and described is admirably adapted to fulll the objects primarily stated, it is to be understood that it is not intended to conne the invention to the one form or embodiment herein disclosed, for it is susceptible of embodiment in various forms all coming within the scope of the claims which follow.

What is claimed is:

l. In a machine of the class described, the combination of a driving means; a plurality of driven members driven by said driving means; a projection on one of the driven members; a coupling device carried by another of the driven members and normally engaging the projection on the first driven member to cause them to operate in unison; means adapted to be moved into the path of the coupling device to disengage it from said projection upon movement of the driven members; a cam device for operating the last mentioned means; and a manipulative device for operating the cam device.

2. In a machine of the class describedthe combination of a driving means;iirst and second members driven thereby; a projection on the first driven member; a coupling pawl carried by the second driven member and adapted to engage said projection to actuate the second driven member with the first driven member; means projecting laterally from the coupling pawl; a rockable member adapted to cooperate with said laterally projecting means during the initial movement of the driven members by the driving means; a cam device for operating the rockable member; a manipulative device settable to a plurality of positions of adjustment; and means intermediate the manipulative device and the cam device for operating the latter When the manipulative device is in a certain one of its positions of adjustment for moving the rockable member into the path of the laterally projecting means on the coupling pawl to effect the disengagement of the coupling pawl from the projection on the first driven member.

3. In a machine of the class described, the combination of a driving member; a first driven member driven thereby; a projection on said rst driven member; a second driven member; a

latch pivotallymounted on said second member and normally engaging the projection on the rst driven member to couple the second driven member to the rst driven member for movement in unison therewith; a pin on said latch; and a member shiftable into and out of the path of movement of said pin and operable when shifted into the path of the pin to coact with the pin, during an initial movement of said lirst and second driven members, to uncouple said second driven member from said first driven member and to retain the second driven member against further movement while said first member continues to be driven by the driving member.

4. In a machine of the class described, the combination of a control member settable to a plurality of positions; a driving member; a plurality of diierentially operable driven members; a shiftable coupling device mounted on one of said members and operable to couple the members together for joint operation; said coupling device being driven relatively to said control member when the machine is operated; and said control member in one of its positions being operative to shift the coupling device when the coupling device moves relative thereto, whereby the two members will be uncoupled upon operation of the machine 5. In a machine of the class described, the combination of a differentially movable actuator; a` differentially movable arm; a coupling device carried by the actuator to connect the latter to the arm for movement in unison therewith; adjustable control means; means settable by the adjustable control means into cooperative relation with the coupling device and having a part for moving the coupling device to uncoupling position and a part for holding the coupling device and actuator against further movement when the coupling device has been moved to uncoupling position; means for driving said arm and coupling device and therewith said actuator to move the coupling device into engagement with the first-mentioned part of the settable means so that this part can move the coupling device to uncoupling position upon continued movement of the coupling device into engagement with the other part of the settable means to arrest the coupling device and actuator against further movement while the arm continues its movement; and resilient means cooperating with the coupling device to maintain the actuator in a definite position when the coupling has been moved to uncoupling position.

6. In a machine of the class described, the combination of two driven members; driving means therefor; coupling means normally maintaining the two members in condition so that they operate in unison; a manipulative device; a rockable member having a portion thereof shiftable into or out of cooperative relationship with the coupling means; and means operated by the manipulative means for shifting the rockable member; said driving means being operable to drive the coupling means, through the driven members, into cooperation with said portion of the rockable member when the portion of the member is in cooperating position, continued movement of the driving means causing the portion of the rockable member to disengage the coupling means, whereat one driven member is moved independently of the other.

7. In a machine of the class described, the combination of a driving mechanism; two driven members one of which is driven positively by the 6 driving mechanism; a coupling latch carried by the second driven member to connect the same to the first driven member and positively driven with the two driven members; a manipulative device settable to an add position and a total position; and means moved to a controlling position by said device when the device is moved to one of said positions, and effective when the device is in said position, to rock the coupling latch as the coupling latch is positively driven with the second driven member during an initial movement thereof relative to said means, to uncouple the second driven member from the first driven member.

8. In a machine of the class described, the combination of a diierentially movable actuator; a differentially movable arm; normallyeiective coupling means movable with said actuator and said arm and connecting said actuator to said arm; adjustable control means; means normally disengaged from the coupling means and settable by the control means into and out of engaging relation with the coupling means; and means to drive the actuator, arm, and coupling means to move the coupling means into engagement with the settable means, when the settable means is in engaging relation with the coupling means, to shift the coupling means during an initial movement of said arm and actuator for releasing said actuator from said arm.

9. In a machine of the class described, the combination of a driving means; two driven members; a coupling device to couple the two driven members together; a manipulative device; and means adjusted by said manipulative device into and out of cooperative relation with the coupling device, said driving means moving said coupling device, through said driven members, into engagement with said adjusted means when in cooperative relation with the device, to actuate said coupling device and uncouple the members upon continued movement of said device after engagement with said adjusted means.

10. In a machine of the class described, the combination of two differentially operable members; coupling means normally in position to connect the two members so that they move together; a rockable member separate from said coupling means and settable to a plurality of positions while said coupling means remains in said normal position, said member, when in one of said positions, being in cooperative relation with said coupling means; manipulative means to adjust said rockable member into and out of cooperative relation with said coupling means; and means to drive the two differentially` operable members and therewith the coupling means to move the coupling means into engagement with the rockable member, when in said one position, to cause the Coupling means to be moved from its normal position to uncouple the two differentially operable members.

11. In a machine of the class described having a differentially operable arm and a differential actuator, the combination of a coupling device for coupling said arm and said actuator for joint differential movement; a shifting member settable into and out of effective position and operable, when in effective position, to shift the coupling device upon engagement of the coupling device with the member and movement of the coupling device relative to the member; a manipulative means for setting said member; means to drive the arm and the coupling device and through the coupling device drive the actuator,

said driving means moving said coupling device into engagement with the shifting member and relative thereto so that the coupling device is shifted and the arm is uncoupled from the actuator for differential movement without the actuator; and a spring-urged pawl to control the position of the actuator when the actuator is uncoupled from the arm and the arm is driven by the driving means.

12. In a machine of the class described having a first driven member and a second driven member, the combination of a coupling device movable with the driven members and normally in position to couple the two driven members together but movable to a position to uncouple these members for separate movement; a manipulative device; means settable by the manipulative device to a position where it can cam the coupling device to said uncoupling position during an initial movement of said driven members and said coupling device; and means to drive said first driven member and coupling device` and, through said coupling device, said second driven member so that said settable means can cam the coupling device to uncoupling position and the first driven member can be driven separate from the second driven member.

13. In .a machine of the class described, the combination of a differentially movable actuator; a differentially movable arm; a coupling device carried by the actuator to connect the actuator to the arm for movement in unison therewith; adjustable control means; means intermediate said adjustable control means and the coupling device an-d settable by the control means into and out of engaging relation with the coupling device for selectively rendering the coupling device ineffective; means for driving the arm to move the coupling device into engagement with the intermediate means, when the intermediate means is in engaging relation with the coupling device, to move the coupling device to ineffective position; and means for controlling the position of the actuator and coupling device to maintain the actuator in a denite position when the coupling device has been rendered ineffective `and the actuator has been uncoupled from said arm..

14. In a machine of the class described, the combination of a differentially movable arm; a differentially movable actuator; a coupling pawl carried by said actuator; means on the arm cooperating with the coupling pawl to move the actuator with the arm; an adjustable member movable, while the pawl remains in engagement with the means on the arm, to a position to cooperate with the coupling pawl when the machine is operated; means for moving said arm and actuator, and therewith said coupling pawl,

to move the coupling pawl into engagement with said positioned member so that the member will disengage the coupling pawl from the means on the arm upon continued movement of the coupling pawl during the initial movement of the coupling pawl, arm, and actuator; and a camming device for moving the adjustable member into said position Where it can disengage the pawl from the means on the arm,

15. In a machine of the class described having a driving member, a iirst driven member, a latch to connect the rst driven member to the driving member for positive operation thereby, and aKsecon-d driven member, the combination of coupling means normally connecting the second driven Amember to the rst driven member so that the driven members are positively operated in unison; a manipulative device; and rockable rockable means and causing the rockable means to move the coupling means to ineiective position whereby the second driven member is disconnected from the first driven member during the initial part of their driven movement.

PASCAL SBURLINO. JOHN H. GRUVER.

CERTIFICATE CF CORRECTION.

Patent No. 2,229,771. January 28, 19m.

PASCAL SBURLINO, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring Correction as follows; Page 5, second column, line Y, for "If, upon the return movement of' the rack 89," read when the shaft 55 starts to move, the rack Z39- page 6, first column, line 6b., claim ll, after the word "arm" insert a comma; and that the said Letters Patent should be read with this Correction therein that the same may Conform to the record of the Case in the Patent Office.

.Signed and sealed this 18th day of March, A. D. 1911.1.

Henry Van Arsdale,

(Seal) Acting Commissioner of' Patents.

CERTIFICATE OF CORRECTION. l Patent No. 2,229,771. January 28, 194l.

PASCAL SBURLINO, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, second column, line T, for I f, upon the return moifement of the rack 89," read --When the shaft 55 starts to move, the rack 89"; page 6, first column, line 61+, claim ll, after the word "arm" insert a comma; and that the said Letters Patent should be read with this correction therein that the same may Conform to the record of the case in the Patent Office signed and sealed this 18th day of March, A. D. 19in.

. Henri)T Van Arsdale, (Seal) Acting Commissioner of Patents.

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