US1086244A - Calculating-machine. - Google Patents

Description

M. TEBTOR.

CALCULATING MACHINE.

APPLIOATION FILED MAR. 25, 1909.

Patented Feb. 3, 1914.

3 SHEETS-SHEET 1.

M. TEETOR.

GALGULATING MACHINE.

APPLIGATION FILED MAR. 25, 1909 Patented Feb. 3, 1914.

3 SHEETS-SHEET 2.

M. TEETOR. CALCULATING MACHINE.

APPLIOATION FILED MAR. 26, 1909.

Patented Feb. 3, 1914.

with/65585 v l-h gynlpr W Ym/ MARTIN TEETOB, OF DES HOINES, IOWL.

CALCULATING-CHINE.

Specification of Letters Patent.

Patented Feb. 3, 1914.

Application filed Iarch 85, 1900. Serial No. 485,724.

To all whom it may concern:

Be it known that I, MARTIN TEEToR, a citizen of the United States, residing at Des Moines, in the county of Polk and State of Iowa, have invented a certain new and useful Calculating-Machine, of which the following is a specification.

My invention relates to and consists in certain new and useful improvements in calculating machines of the class in which the adding'wheels are actuated by rack bars and the type are moved to printing position by being carried by type bearing levers actuated in unison with the rack bars.

My object is, broadly, to provide improved means for operating and controlling the movements of the rack bar and type bearing levers.

More specifically, it is my object to provide simple and durable means for connecting the type bearing levers with a supporting rock shaft in such a manner that the type bearing levers will be carried with the shaft by means of their frictional engagement, and then when the type bearing lever is stopped, the rock shaft may continue to rotate to the completion of its stroke without further moving the type bearing lever so that all of the type bearing levers that are actuated during the operation of the rock shaft will be carried with the rock shaft slowly and at uniform speed and then each will be held and retained in proper position for printing without any shock or ar to the machine or excessive wear on the operative parts.

A further object is to provide improved means of simple, and durable construction for automatically preventing the type bearing lever from moving backwardly after ithas started on its operative movement, which means will be automatically released to permit a return movement of the type bearing lever when the rock shaft on which the type bearing levers are mounted has completed its movement.

A further object is to provide means for supporting the type bearing levers firmly in position with the type thereon in accurate printing position. In this connection, it is to be understood that the type bearing levers are mounted upon the rock shaft at points widely spaced apart and that the type bearing ends thereof are close together and that conslderable difficulty has been experienced heretofore in keeping the type bearing ends of said levers accurately in alinement.

A further object is to provide simple, durable, and easily actuated means whereby the adding mechanism may be retained in an inoperative osition without affecting the operation of t e type bearing lever and other parts so that the machine may be used for printing purposes without changing the positions of the adding wheels.

My invention consists in the construction, arrangement, and combination of thevarious parts of the device whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which- Figure 1 shows a vertical, longitudinal sectional view of a calculating machine embodying my invention. Fig. 2 shows a detail plan view, partly in section, for illustrating the means for connecting the type bearing levers and the rack bar levers with the rock shaft and also the means for securing the type bearing lever to the rack bar lever. Fig. 3 shows a detail front View illustrating the lower portion of the slotted bar in which the rods that are connected with the type bearing levers are slidingly mounted and also the means for securing the type bearing lever to the rack bar lever. Fig. 4 shows a view similar to Fig. 1 of a modified form of my invention. Fig. 5 shows a detail plan view, partly in section, illustrating the means for preventing a return or downward movement of the type bearing levers until after they have completed their upward movement. Fig. 6 shows a top or plan view of the modified form illustrated in Fig. 4. Fig. 7 shows a detail side view of the device for automatically throwing the shaft of the adding wheels forwardly out of engagement with the rack bars, and Fig. 8 shows a detail, sectional view illustrating the means for connecting the rack bar and type bearing levers with the rock shaft, in the modified form of construction shown in Fig. 4.

In the following description, I shall first describe briefly the parts of the calculating machine which are shown in the drawings but which, however, are of the ordinary construction now in common use, and which, therefore, of themselves form no part of my present invention except as they are necessary features of the combination.

The reference numeral 10 is used to indicate the frame of the calculating machine. At the rear of the frame is a printing platen 11. At the front of the machine are a number of series of key bars 12, there being one complete series for each type bearing lever. Each of the key bars is connected to a bell crank lever 13, and connected with each of the bell crank levers 13 is a rod 14 which is slidingly mounted in a corresponding slot 15 arranged in a stationary slotted bar 16. Therefore, when one of the key bars in the series is depressed, the corresponding rod 14 is moved rearwardly in the slot 15 and forms an obstruction to the upward movement of the type bearing levers as will hereinafter appear.

Mounted beneath each series of bell crank levers 13 is a slide-bar 17 having adjacent to each bell crank lever a pin 18 to be engaged by the bell crank lever when the key bar is depressed to thereby move the slide bar forwardly and upwardly. Connected with the lower end of the slide bar 17 is a pivoted lever 19, and a rod 20 is attached to the lower end of it and enters a slot 21 in the slotted bar 16. This rod is provided with an arm 22 to project through and beyond said slot, the arrangement being such that when any key bar in the series is depressed, the rod connected with it will be moved rearwardly and the rod 20 will be moved forwardly. At the rear of the machine frame is a printing hammer 23 of ordinary construction.

Mounted above the slotted bar 16 is a shaft 24 having the arms 25 pivoted thereto, said arms being designed to provide a support for the shaft 26 of theadding wheels 27. These adding wheels and the supporting means connected with them are of the ordinary construction now in common use and of themselves form no part of my present invention. Arranged at the left side of the machine frame is an operating crank 28.

The parts before mentioned are not described in detail for the reason that the construction and function of same are well known to persons skilled in the art, and for the further reason that they of themselves form no part of my present invention.

Mounted in the machine frame is a rock shaft 29 having fixed to one end a sleeve 30 on which there is an arm 31 connected to the plunger 32 of a dash-pot 33 of ordinary construction. Rotatably mounted on the shaft 29 adjacent to the sleeve 30 is an arm 34 extended downwardly and having two lugs 35 at its lower end spaced apart from each other. Fixed to the sleeve 30 is an arm 36 extended downwardly and provided with a pin 37 which pin is extended to a point between the lugs 35. Said arm 36 is also provided with a second pin 38 for purposes hereinafter made clear. The parts numbered 30 to 38 inclusive are common to both forms of construction. The operation of this part of the device is as follows:

hen the lower end of the arm 36 is moved forwardly, the pin 37 will, after moving a short distance, strike the forward lug. 35 of the arm 34 and it will then move the arm 34 forwardly and at the same time the piston 32 will be retarded in its movement by the dash-pot.

Referring to the form shown in Figs. 1, 2 and 3, it will be observed that fixed to the rock shaft 29 adjacent to the arm 34 is a collar 39 having a disk 40 at one end provided with a flat face. The said rock shaft is provided with a spline 41, and adjacent to the disk 40 is a second collar 42 having a disk 43 thereon, the face of which is adjacent to the flat face of the disk 40.

This collar 42 is provided with a groove to receive the spline 41 so that the said collar 42 is slidingly and non-rotatably mounted upon the shaft. is a collar 44 similar to the collar 39 except that it is also provided with a groove to receive the spline 41 and is, therefore, slidingly and non-rotatably mounted on the rock shaft 29. A pair'of collars 42 and 44 is provided for each of the type bearing levers of the machine, as clearly shown in Fig. 2. Each of the collars 42 is also provided, adjacent to the flat face of the disk 43, with an annular rib 45 designed to enter a corresponding groove 46 in the adjacent collar, as shown in Fig. 2.

Each type bearing lever comprises a body portion 47 having an opening therein to receive the annular rib 45 and the shaft 29, said type bearing lever being inserted be tween the adjacent flanges of the collars, as shown in Fig. 2. On the rear end of the type bearing lever 47 is a segmental arm 48 having type 49 therein designed to be engaged by the printing hammer 23 to force the type toward the printing platen 11, and on the forward end of the type bearing lever 47 is an extension 50 projected over the slotted bar 16 and designed to engage the rods 14 or 20'.

In both forms of construction, on the rock shaft 29 at the end opposite from the sleeve 30 is an adjustable nut 0 and an extension coil spring 50*, the latter being mounted on the rock shaft between the nut and the adjacent one of the collars 42 so that all of said collars are yieldingly held by said spring toward each other and so that the type bearing levers are frictionally held in position between the disks.

Referring to Figs. 1, 2 and 3, the rack bar Adjacent to the collar 42 lever comprises a body portion 51 loosely mounted in an annular groove formed in the collar 39, as shown in Fig. 2. The forward end of the. said lever is provided with a segmental upwardly extended rack 52 and also with a se ental arm 53 extended downwardly. T is arm 53 has a forwardly projected lug .54 at its lower end to extend over and ad acent to the slotted bar 16. A stop 55 is provided forlimiting the downward movement of the rack bar lever. There is one of the rack bar levers provided adjacent to each of the type bearing levers. Only one of these rack ars is shown in Figs. 1 and 2 of the drawings, but it is to be understood that the type bearing levers and the rack bar levers are arranged in pairs throughout the entirev machine.

By means of the arrangement of the type bearing and rack bar levers and connected parts before described, it is obvious that if the rock shaft 29 is turned without any one of the keys 12 being first depressed, the rod 20 will hold the forward end of the type bearing lever downwardly, and, therefore, the rock shaft will move without operating the type bearin lever or the rack bar as the friction caused the spring 50 is not sufficient to prevent a rotation of the rock shaft.

In both forms of construction shown I have provided for moving the rock shaft 29 by means of the crank 28 as follows: Fixed to the crank 28 is an arm 56 extended upwardly and having a link 57 pivoted to its upper end and connected to a bell crank lever 58, which lever is fulcrumed to a stationary pin 59. Connected to the arm 56 is a contractible coil spring 60 which is connected at its other end to the lever 36 and connected to the arm 56 is a second contractible coil s ring 61 extended rearwardly and connecte to a stationary pin 62. Pivoted to the arm 56 is a rod 63 extended through a small collar 64 ivoted to the arm 36. This rod 63 is provided with a stop 65 designed to engage said collar 64. The operation of this part of the device is as follows: Assuming the parts to be in the position shown by solid lines in Fig. 4, then if the arm 56 is moved forwardly to the position shown by dotted lines in said figure, the link 57 and the arm 58 will have their pivotal points extended a short distance below a horizontal line so that they will pass a dead center, and this downward movement will be limited by a stationary pin 66 so that the arm 56 is thereby locked by means of the link 57 and the lever 58 against rearward movement. This forward movement of the arm 56 will also cause tension to be applied to the spring 61. As soon as the pin 38 on the arm 36 strikes the lower end of the bell crank lever 59 it will raise the forward end spring 61 will then be effective to return the arm 56 to its rearward limit. It is obvious, however, that said arm 56 cannot be returned until the .pin 38 strikes upon the bell crank lever 58 to thereby elevate the joint between the parts 57 and 58. Then, when the arm 56 moves rearwardly, the rod 63 and the stop 65 thereon will engage the pivoted collar 64 and thus positively move the arm 36 rearwardly to its starting point. Therefore, when the operating crank is turned, the arm 56 is moved to its forward limit and locked; then the arm 36 is moved forwardly by spring pressure until it reaches its forward limit, whereupon it automatically unlocks the arm 56; and then the spring 61 moves the arm 56 rearwardly, and the stop 64 on the rod 63 then moves the arm 36 rearwardly.

In order to avoid the ossibility of the arm 56 moving rearwardly before it has completed its forward movement, I have provided the following device: Pivoted to the central portion of the arm 56 is a bar 67 having connected with its pivot pin an upwardly extended arm 68 connected by a cont-ractible sprin 69 with the central portion of the bar 6 This arm 68 normally stands in an upright position, as shown in Fig. 4. Mounted on the slotted bar 16 is a stop 70 in position to be engaged by the arm 68 when at its forward limit of movement.

In the forward end of the bar 67 is a slot 71.

Pivoted to the machine frame is a disk 72 having a concave groove in its periphery and having a pin 73 secured to it and passed through the slot 71. Fixed to a stationary support adjacent to the forward side of the disk 72 is a segmental bar 74 also having a concave groove in its face that is adjacent to the disk 62. The said segmental bar is arranged eccentrically relative to the disk, it being nearest the disk at its lower end. Interposed between the segmental bar and the disk ,is a ball 75. In operation, this portion of the invention performs the following function: When the parts are in the position shown by solid lines in Fig. 4, then the forward movement of the arm 56 causes the disk 72 to be rotated approximately one-half of a revolution, and when the arm 56 is in the position shown by dotted lines in Fig. 4, the pivotal point of the bar 67 will be slightly below a line drawn through the ends of the bar 67 and through the center of the disk 72. If during this forward movement of the arm 56, the said arm 56 should be released, obviously, the spring 61 would tend to immediately move it rearwardly. This movement, however, would be checked and prevented by means of the ball 75 being wedged between the parts 74 and 72 as the said ball prevents any rotation of the disk 72 in a contrary clockwise direction, but does not prevent said disk from moving clockwise. II owever, when the arm 56 has completedits forward stroke, then the arm 68 will strike upon the stop 70 and will cause the spring 69 to be placed under tension which will operate to press upwardly upon the forward end of the bar 67. This will be sutlicient to cause the said forward end of the bar 67 to move upwardly a slight distance until it is above the center of the disk 72, whereupon the spring 61 will move the arm 56, and with it the bar 67, in a rearward direc tion. This means for preventing any backward movement of the arm 56 prior to the time when the forward movement is completed is very simple and inexpensive in construction and operates noiselessly, and is not liable to get out of repair. On the return stroke of the arm 56, the arm (37 moves by gravity past the dead center, as shown in Fig. 4, and is assisted into this position by the momentum of the disk 76 which is given rapid clock-wise rotation when the crank 28 is returned under the action of the spring 61. This movement of the bar 67 past the dead center on the return stroke is permitted by the slotted connection between the bar and the disk 72.

As before noted herein, in the form shown in Figs. 1, 2 and 3 the type bearing lever is frictionally held to the rock shaft 29 while the rack bar lever is loosely mounted thereon. In order to provide means for connecting these two levers so that they may properly operate in unison, I have provided the following mechanism: As shown in Fig. 1, on the forward end of the type bearing lever is a pin '76. On the lower end of the arm 53 of the rack bar lever is a small lever 77 having a pin 78 at its lower end and a slot 79 at its upper end. Obviously, when the slot of the lever 77 engages the pin 76, the two levers will be secured together so that they will move up and down in unison, and when the slotted end of the lever 77 is moved away from the pin 76, then the type bearing lever may move up and down without affecting the rack bar lever. It is obvious that it is desirable to connect these levers together whenever any key barin the series corresponding to the levers has been depressed.

As previously described herein, there is a slide bar 17 that is moved rearwardly and upwardly whenever any key bar is depressed. On the upper end of this slide bar, I have provided a pin 80, and pivoted to a stationary support is a lever 81 having an arm 82 at its upper end provided with a notch to receive the pin 80. The arm is held in position with the notch adjacent to the pin by means of a spring 83 so that whenever the slide bar 17 is moved rearwardly, the upper end of the lever 81 also moves rearwardly. Connected to the lower end of the lever 81 is a rod 8 1 extended rearwardly and pivoted to a lever 85. The upper end of the lever 85 is provided with an openended slot designed to receive the pin 78. This lever 85 is pivoted to a stationary pivot pin 86. These parts are so arranged and combined relative to each other that they will operate as follows: Assuming the parts to be in the position shown in Fig. 1, then, obviously, the type bearing lever 4:? could move upwardly at its forward end without affecting the rack bar lever 51. Assuming, however, that the lever 81 is operated by means of the slide bar 17 and its lower end moved forwardly, then the lever 85 will cause the upper end of the lever 77 to be moved forwardly so that the pin 76 will enter the slot 7 9. Then, when the forward end of the type bearing lever moves upwardly, it will carry with it the rack bar lever. In other words, the two levers will be connected with each other and will move in unison, and when said levers return to their lower limit of movement, the pin 78 will enter the slot of the lever 85. One of the advantages gained by this construction of independent levers for the type and rack bar and the means for connecting them is that it enables the operator to use the type hearing levers for printing purposes without causing any operation whatever of the rack bar levers, and, in order to accomplish this purpose, I have provided a spring-actuated key 87 arranged above each of the levers 82. By pressing downwardly upon the key bar 87, the lever 82 is forced below the pin 80 and the lever 81 is thereby held in the position shown by solid lines in Fig. 1. Then, if a key 12 is depressed, the rod 20 will be withdrawn forwardly and the type bearing lever will move upwardly until it strikes the rod of the depressed key, whereupon the printing is accomplished in the ordinary way and the rack bar lever is not moved during such operation. This desirable result, of course, cannot be accomplished unless the type bearing lever and the rack bar levers are separate and independent. However, there is no disadvantage occasioned by the use of the independent levers for the reason that the means for connecting them is of extremely simple construction, positive in its action, and not liable to get out of order.

In machines of this class, it is necessary to provide some means for moving the adding wheels forwardly out of engagement with the rack bars when the rack bars are at their upper limit of movement so that the adding wheels will not be turned backwardly when the rack bars are moved downwardly. For this purpose, I have provided the following mechanism: Pivoted to a stationary support is a bell crank lever 88 connected at one end by means of a rod 89 with the arm 34, and having in its other end a slot 90 with an inclined portion in its center, as clearly shown in Fig. 7. The adjacent one of the arms 25 is provided with a pin 91 to enter the slot 90. By this arrangement, upon a forward movement of the arm 34, the forward portion of the bell crank lever 88 will be moved upwardly, which, on account of the pin 91 and slot 90, will cause the arm 25 to move forwardly far enough to throw the adding wheels 27 out of engagcment with the rack bars. Then, upon a rearward movement of the arm 34, the adding wheels are again returned to normal position.

In the modified form shown in Figs. 4, 6 and 8, the construction and operation of the parts is the same as that hereinbefore described, except that the rack bar lever 51 and the type bearing lever 47' are both formed complete in one piece and are connected to the shaft 29 in the same manner as the type bearing lever in the form of the machine before described. The frictional connection between combined lever 47'51 and the rock shaft 29 is precisely the same as the connection between the rock shaft and the type bearing lever 47 of the construction shown in Figs. 1, 2 and 3, the only difference being that the collars 39 and 44' are not provided with the annular groove or recess formed on the collars 39 and 44. This groove or recess is not necessary in the modified form because the rack bar lever is formed integral with the type bearing lever. From Fig. 8 it will be-seen that the combined type bar lever and type bearing lever 51'47 is frictionally held between the collars 42' and 44'; the latter being provided with a recess 46 for receiving the annular rib 45 of the collar 42. By reason of combining these two levers in one in the modified form, I dispense with the mechanism for detachably connecting the forward ends of said levers consisting of the parts 77 to 87, inclusive. In this way the construction of the machine is somewhat simplified, but

' I do not attain the desirable result of providing a machine in which the type bearing levers may be actuated without actuating the rack bar levers, and, in someinstances, the independent operation of the t pe bearing levers is important and valuab e. In all other respects, the construction and operation of the mechanism is the same in the modified form as in the form particularly and fully described herein.

One of the important advantages gained by my invention is that the movement of the type bearing lever to operative position is positive and is not dependent upon the uncertain and unequal action of springs for causing said movement, and furthermore, when the movement of the type bearing lever to printing position is obstructed, the

rock shaft will continue its movement to the end of the stroke and there will be no appreciable shock or jar to the machine caused by the stopping of the type bearing lever or the continued movement of the rock shaft after the type bearing lever stops. Furthermore, this principle of operation of the type bearing levers results in a construction of great simplicity and durability.

Another one of the important advantages in connection with the invention herein set forth arises from the-use of the ball clutch device acting in conjunction with the disk 72. This structure is extremely simple and durable and yet will positively prevent a return movement of the operating crank until its stroke has been completed, and, at the same time, at the completion of the stroke of the operating crank, the ball clutch device is released in such a manner that the return movement of the lever 56 is not in any way interrupted or impeded. Furthermore, the ball clutch device is noiseless in its operation.

Another one of the advantages gained by my invention is that by supporting each type bearing lever between two large friction disks, the lever is firmly held against twisting strains. reason that the pivotal supports of the levers are necessarily widely separated while the type bearing ends thereof must be close together so that the shape of the type bearing levers or most of them is irregular and comprises a considerable lateral bend as shown in Fig. 6. Therefore, by means of my improved lever supporting disks, any lateral strain upon the type bearing levers will not throw the type bearing ends out of line. and I, therefore, increase the durability of the machine by preventing the type bearing levers from getting out of alinement.

I claim as my invention.

1. In a device of the class described, a lever carrying movable type at one end, a rock shaft serving as a support for said lever, a friction connection between said rock shaft and said lever, and means for operating the rock shaft.

2. In a device of the class described, a type bearing lever, a friction support for the type bearing lever, and means for operating the friction support. and means for retarding the movement of the type bearing lever.

3. In a device of the class described, the combination of a lever carrying movable type at one end, a swinging support forsaid lever, friction means for yieldingly holding the type-bearing lever to the support, and means for swinging the support to swing said lever and its type.

4. .In a device of the class described, the combination of a type bearing lever, a suport for same, friction means for yieldingly holding the type bearing lever to the sup- This is desirable for the port, and means for operating the support, and means for retarding the movement of the type bearing lever.

5. In a device of the class described, the combination of a rock shaft, a friction device mounted on the rock shaft, a type bearing lever frictionally supported by said friction device, and means for operating the rock shaft.

6. In a device of the class described, the combination of a rock shaft, a friction device mounted on the rock shaft, a type hearing lever frictionally supported by said friction device, and means for operating the rock shaft, and means for retarding the movement of the type bearing lever.

7. In a device of the class described, the combination of a rock shaft, a friction disk fixed thereto, a second friction disk adjacent to the first, means for yieldingly holding one of said disks toward the other, and a type bearing lever mounted on the shaft between said disks.

8. In a device of the class described, the combination of a rock shaft, a friction disk fixed thereto, a second friction disk adja cent to the first, means for yieldingly holding one of said disks toward the other, and a type bearing lever mounted on the shaft between said disks, said latter friction disk being slidingly and non-rotatably mounted on the shaft.

9. In a device of the class described, the combination of a rock shaft, a friction disk fixed thereto, a second friction disk adjacent to the first slidingly and non-rotatably mounted on. the shaft, and a series of pairs of friction disks slidingly and non-rotatably mounted on the shaft, a spring in engagement with the end one of said friction disks opposite from the fixed friction disk for yieldingly holding all of the pairs of disks toward each other, and a type bearing lever mounted between each pair of said disks.

10. In a device of the class described, the combination of a rock shaft, means for operating it, two friction disks mounted upon said shaft, one of them being provided with an annular rib and the other with a co-acting annular groove, and a type bearing lever mounted on the shaft and in engagement with said annular rib and arranged be tween said disks.

11. In a device of the class described, the combination of a rock shaft, means for opcrating it, two friction disks mounted upon said shaft, one of them being provided with an annular rib and the other with a co-acting annular groove, and a type bearing lever mounted on the shaft and in engagement with said annular rib and arranged between said disks, and means for yieldingly holding the disks toward each other.

12. In a device of the class described the combination of a frictionally controlled type bearing lever and a lever designed to actuate addin wheels, said levers being capable of independentoperation.

13. In a device of the class described, the combination of a frictionally controlled type bearing lever and a lever designed to actuate adding wheels, said levers being capable of independent operation, and means for connecting said levers for operation jointly.

14. In a device of the class described, the combination of a rock shaft, a frictionally controlled ty e bearing lever connected with the rock sha t for movement in unison with it, a lever for actuatin adding wheels loosely mounted on said s aft and capable of independent movement relative to the type bearing shaft, and means for connecting said levers for joint operation.

15. In a device of the class described, the combination of a rock shaft, a friction device mounted thereon, a type bearing lever supported by said friction device, a rack bar lever rotatably mounted upon said rock shaft and capable of independent movement relative to the type bearing lever, and means for connecting said levers for joint operation.

16. In a device of the class described, the combination of a type bearing lever and a rack bar lever capable of independent move ment, a pin carried by one of said levers, a hook carried by the other, and means for throwing the hook into engagement with the pin for connecting said levers for joint operation.

17. In a device of the class described, the combination of a type bearing lever, a rack bar lever capable of movement independent of the type bearing lever, a series of key bars, and means actuated upon a depression of any one of the key bars of the series for connecting said levers for joint operation.

18. In a device of the class described, the combination of a type bearing lever, a rack bar lever capable of movement independentof the type bearing lever, a series of key bars, and means actuated upon a depression of any one of the key bars of the series for connecting said levers for joint operation, and means for automatically disconnecting said levers upon a return movement of the levers.

19. In a device of the class described, the combination of a type bearing lever, a rack bar lever capable of movement independent of the type bearing lever, a series of key bars, and means actuated upon a depression of any one of the key bars of the series for connecting said levers for joint operation, and means for holding said lever connecting devices out of operation so that one of them maymove independently of the other.

20. In a device of the class described, the

combination of a rock shaft, a type bearing lever and a rack bar lever mounted thereon and capable of independent movement, a latch device for connecting said levers for joint operation, a series of key bars for said levers, a slide bar arranged to be moved upon a depression of any one of said key bars, a lever connected with said slide bar, a link connected with said lever, a lever connected with said link and having an open-ended slot therein, a hook carried by the rack bar lever and having a pin thereon to engage the lever with the open-ended slot, and a pin carried by the type bearing lever to be engaged by said hook, said parts being so arranged that upon a depression of any key bar, the said hook will be thrown into engagement with said pin, and the type bearing lever and the rack bar lever will be connected by said hook and pin for joint operation.

21. In a device of the class described, the combination of a rock shaft, a type bearing lever and a rack bar lever mounted thereon and capable of independent movement, a latch device for connecting said levers for joint operation, a series of key bars for said levers, a slide bar arranged to be moved upon a depression of any one of said key bars, a lever connected with said slide bar, a link connected with said lever, a lever connected with said link and having an openended slot therein, a hook carried by the rack bar lever and having a pin thereon to engage the lever with the open-ended slot, and a pin carried by the typebearing lever to be engaged by said hook, said parts being so arranged that upon a depresslon of any key bar, the said hook will be thrown into engagement with said pin, and the type hearing lever and the rack bar lever will con nected by said hook and pin for oint operation, and means for holding said hook in position out of engagement with 1ts pin comprising a pin connected to said slide bar, a spring actuated arm having a notch therein in engagement with said pm, said arm being pivoted to the lever that is connected to the slide bar, and a key mounted above said spring actuated arm and so arranged that when depressed it will move the spring actuated arm from position out of engagement with the pin so that the slide bar may operate without moving the lever.

22. In a device of the class described, the combination of an operating crank, a clutch device connected therewith to prevent backward movement thereof, and a frictionally controlled type bearing lever operatively connected with said operating crank.

23. In a device of the class described, the combination of an operating crank and clutch device connected therewith to prevent backward movement thereof, a frictionall controlled type bearing lever 0perative y. connected with said operating crank and means for retarding the movement of the type bearing lever.

24. In a device of the class described, the combination of an o crating crank, a bar connected with it, a isk havin a concave groove in its periphery and having said bar pivoted to it, a segmental clutch member having a convex groove therein arranged eccentrically relative to the disk, and a ball interposed between them.

25. In a device of the class described, the combination of an operatin shaft, a bar pivoted to it, a disk ivote to the bar, a clutch device arranged to act on said disk, said parts being so arranged that when the operating crank is in normal position, the point of attachment of the bar with the disk will be slightly below a line drawn from the pivotal point of the bar at one end through the pivotal point of the disk, and when said operating crank is being moved to its other limit, the disk will be moved slightly less than a half revolution and the pivotal point of the bar with the disk will be slightly below a line drawn through the pivotal point of the other end of the bar and the pivotal point of the disk.

26. In a device of the class described, the combination of an operating shaft, a bar pivoted to it, a disk pivoted to the bar, a clutch device arranged to act on said disk, said parts being so arranged that when the operating crank is in normal position, the point of attachment of the bar with the disk will be slightly below a line drawn from the pivotal point of the bar at one end through the pivotal point of the disk, and when said operating crank is being moved to its other limit, the disk will be moved slightly less than a half revolution and the pivotal point of the bar with the disk will be slightly below a line drawn through the pivotal point of the other end of the bar and the pivotal point of the disk, and spring actuated means for imparting an upward movement to the end of the bar that is pivoted to the disk' at the time when the bar is in its last named position.

27. In a device of the class described, the,

combination of an operating shaft, a bar pivoted to it, a 'disk pivoted to the bar, a clutch device arranged to act on said disk, said parts being so arranged that when the operating crank is in normal position, the point of attachment of the bar with the disk will be slightly below a line drawn from the pivotal point of the bar at one end through the pivotal point of the disk, and when said operating crank is being moved to its other limit, the disk will be moved slightly less than a half revolution and the pivotal point of the bar with the disk will be slightly below a line drawn through the pivotal point of the other end of the bar and the pivotal point of the disk, :1 spring actuated means for imparting an upward movement to the end of the bar that is pivoted to the disk at the time when the bar is in its last named position, said means comprising an arm pivoted to the bar, a spring connecting said arm and the bar, and a stationary pin to be engaged by said arm when the bar and disk are in their last named position.

528. In a device of the class described, the combination of a rock shaft, a series of frict-ionally controlled type bearing levers mounted thereon, and means for cushioning the movement of said rock shaft.

29. In a device of the class described, the combination of a rock shaft, a series of frictionally controlled type bearing levers mounted thereon, and a dash-pot for cushioning the movementof said rock shaft.

30; In a device of the class described, the combination of a rock shaft, a series of type bearing levers frictionally held to said rock shaft, and a dash-pot arranged for cushioning the movement of the reel: shaft.

31. In a device of the class described, the combination of indicating wheels, means for operating the same any predetermined amount, printing mechanism operatively connected for printing the amount entered in the indicating wheels, said mechanism including a plurality of type bearing levers, a friction support for each lever, and means for operating said friction support.

32. In a calculating machine, the combination of a plurality of type bearinglevers, a friction support for each lever, means for operating said friction supports, a plurality of indicating Wheels operative in conjunction With said type bearing levers, and a keyboard for controlling the operation of said Wheels.

Des Moines, Iowa, Mar. 5, 1909.

MARTIN TEETOR.

Witnesses:

W. R. LANE, MILDRED B. GOLDIZEN.

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