US1872438A

US1872438A - Calculating machine

Info

Publication number: US1872438A
Authority: US
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

Aug. 16, 1932.

original Filed March lo, 192e C.M.F.FmDEN CALCULATING MACHINE 3 Sheets-Sheet l -lNg/ENTOR.

` Car/ MEI vdeg BY *QI/Reza ATTORNEYS.

Aug. 16, 1932. c. M. F. FRIDEN CALCULATING MACHINE 3 Sheets-Sheet 2 Original Filed March lO, 1926 R.` s. mmJw NM fm u m mi N M l .rnv ImHh Aug.16,1932. C, F, @DEN 1,872,438

f CALCULATING MAQHINE Original FiledMarch 1x0, 1926 3 Sheets-She-et 3 TTUANIEYS Patented Aug. 16, 1932 UNITED STATES PATENT oFFlcE CARL M. F. FRIDEN, OF OAKLAND, CALIFORNIA, ASSIGNOR TO MARCHANT CALCULAT- ING MACHINE COMPANY, OF -EMEBYVILLE, CALIFORNIA, A CORPORATION OF CALIFORNIA l Application led March 10, 1926, Serial No. 93,663. Renewed June 6, 1932o The invention relates to a calculating machine embodying a rotatable actuator, upon which the values to he calculated are set up, rotation of the actuator in either direction [E from full stop position serving to transmit the values introduced into the actuator into` the registering mechanism associated therewith. The registering mechanism is arranged on a carriage which, for the purpose of making the direct action of the selected values on the figure discs of the registering mechanism of highest value possible, is disposed in parallel displaceable relation to the axis of the actuator. The invention is shown embodied in a reversible cycle calculating machine having a single full cycle position.

The inventionrelates to means for stopping the actuator in full cycle position when lcertain conditions prevail in the registering mechanism, whereb the operation of division may be simplified and rendered automatic, and whereby other advantages may be obtained in the performance of other calculations.

An object of the invention is to provide means for automatically stopping the actuator in full cycle position, when the machine is being used for performing problems in division, when the divisor has been removed from the dividend the maximum whole number of times. f

Another object of the invention is to provide means actuated by the rotation of the actuator for automatically stopping the actuator in full cycle position, for either direction of rotation of the actuator.

in .full that embodiment of my invention which I have selected for iilustration in the drawings accompanying and forming part of the present specification. In said drawings .Ihave shown o ne form of apparatus embodying my invention, but it is to be understood that I do not limit myself to such form, since parts thereof being broken away and omitted, l

and other parts being shown in different operativepositions than are indicated in Figure l'.

Figure 3 is a vertical lon itudinal section through a calculating mac ine embodying my invention, showing the mechanism which is operative to control the automatic stopping of the actuator in full cycle position.

Figure 4 is a fragmentary rear view, of the mechanism actuated by the actuator for controlling the stopping of the actuator in full cycle position. f

yFigure 5 is a perspective view of the bracket on which the actuating lever is mounted.

Figure 6 is a vertical. lon itudinal section through a. calculating mac ine embodying my invention, showing the means for stopping the actuator in full cycle position and for subsequently Areleasing the actuator and coupling it to the driving mechanism for subsequent operation.

Figure, 7 1s a side elevation of the tenscarrying drum which is associated with the multiplier or quotient register.

In machines of this character, when used in the performance of problems 'in division, the numeral wheels to the left of the wheels being operated upon by the actuator, change sign when an endeavor is made tb divide the divisor-into the dividend a greater whole number of times than is possible. Under such conditions, the numeral wheel registration changes from a positive'to a negative registration or from a negative to a positive registration and the change in sign of the registration is utilized to effect the stopping of the machine. In the present arrangement, the change in registration is effected by the operation of the' tens-carrying lever, which is associated with one of the units of the actuator at the left end thereof and motion of the tens-carrying lever is employed to control the operation of the mechanism which functions to stop the machine in full cycle position. The mechanism is operable in either direction of rotation of the actuator and operates to stop the actuator in full cycle position and, in a power driven machine, such as is shown in this application, serves to disconnect the actuator from the prime mover and to position the parts of the driving mechanism so that subsequent manipulation of a control key again establishes connection between the actuator and the prime mover.

The invention disclosed in the present application is particularly adapted for use in connection with a calculating machine, such as is disclosed in my copending application Serial No. 62,558, filed in the Patent Office on October 15, 1925. The operating parts of the calculating mechanism disclosed in the present application are substantially identical with those disclosed in my above mentioned application, to which reference is hereby made for a more complete disclosure of the operating control of the calculating machine.

The calculating machine shown in the drawings and in which the automatic stop mechanism of the present invention is incorporated, comprises a suitable base 2 having side plates between which the selecting, counting and controlling mechanism devices are arranged. These devices include a counting mechanism or product register, comprising a series of numeral wheels arranged on a longitudinally displaceable carriage 4, a counting mechanism actuator comprising a. series of actuator units 5, which, upon rotation in either direction, causes the values entered therein to become effective in operating the counting mechanism, keys for entering the selected values into the actuator, and other devices for controlling the actuation of the keys, the selecting mechanism, the counting devices, and the control devices. The machine contains all of the elements necessary to quickly and accurately perform the operations of addition, subtraction, multiplication and division.

The actuator is driven by an electric motor 7 which is connected to the vdriving shaft 8 of the clutch 9 through suitable speed reducing gearing. ratchet wheel 12 secured to the driving shaft 8 and a housing 18 surrounding the ratchet wheel secured to the driving shaft of the The clutch 9 comprises a actuator, the housing 13 being connected to the actuator and the other operating parts of the mechanism through suitable gearing. Pivoted to the housin 1s a pawl 14 having on one end a tooth w ich is adapted to engage the ratchet wheel 12, and having a foot on its other end extending through an aperture in the peripheral wall of the housin". When the foot 15 is pressed inward, the pawl is disengaged lfrom the ratchet wheel and means are provided'for simultaneously pressing the foot inward to disengage the pawl from the ratchet wheel and lock the clutch housin against rotation. The engagement and disengagement of the clutch which causes the starting and stopping of the machine, is effected by the clutch lever 16, provided on its end with a foot 17 which is adapted to engage and depress the foot 15 of the pawl 14. The leve'r 16 is normallyh 35 urged toward clutch disengaging position by the spring 18, and means are provided for moving the lever 16 against the tension of the spring 18, to move the foot 17 from engagement with the clutch housing and causer the pawl 14 to engage the ratchet wheel 12.

Secured to the clutch lever 16 is a pin 19 which is adapted to be engaged by the shoulder formed by the recess 21 in the control bar 22. Means are provided for moving the lcontrol bar 22 longitudinally to rock the lekey 23, since that is suilicient to set forth" the present invention. The various control keys and their connection with the operating mechanism is fully disclosed in myfcopending application above mentioned. The control keys are not provided with means for holding them in depressed position and return to normal position upon the release of the pressure thereon. Depression of the minus bar 23 moves the clutch control bar 22 to the right, rocking the lever 16 about its pivot against the action of the spring 18, in a clockwise direction. Release of pressure on the minus bar 23 permits the spring 18 to rock the clutch lever 16 backward in a counter-clockwise direction so that the foot 17 will engage the foot 15, during the rotation of thek clutch housing and disengage the clutch and stop the housing at full cycle position. vThe clutch housing rotates synchronously with the actuator so that by stopping the housing in full cycle position, the actuator is stopped in full cycle position.

rIhe clutch housing shaft is connected to III) and this gearing includes a shiftable reversing gear 24 which may be shifted to reverse the direction of rotation of the actuator with respect to the housing. The reverse gear 2 4 is shifted by the alternate depression of the plus and minus bars, as is fully set forth in my pending application above referred to.

The machine of my invention also comprises a multiplier or quotient register comprising a series of numeral wheels 25. The selected numeral wheel of this series, the selection depending upon the position of the carriage, is operated one step for each rotation of the actuator bythe finger Wheel 26 splined to the shaft 27, which is rotatable in time with the actuator. The multiplier or quotient register is also provided with a tenscarrying drum 28 which is also rotatable in 4time with the actuator. This mechanism and its operation is fully disclosed in my copending application Serial No. 539,422 filed in the Patent Office on February 27, 1922. In the present machine, in performing problems in multiplication, the actuator, the tenscarrying mechanism associated with the multiplier register and the linger wheel 26, rotate in the same direction. In performing problems in division, the machine is set so that the vtens-carrying drum 28 and the tinge/1 wheel 26 rotate in a direction opposite to the direction of rotation of the actuator. This reversal of direction of rotation of the tens-carrying drum and the finger wheel 26, is effected by movement of the lever 29, which projects through an aperture Lin the casing of the machine. The lever 29 is provided on its inner end with a cam 31, which engages a slot in the shift bar 32. Secured to the shift bar is a yoke 33 which engages a collar or groove on the reversing gear-34, so that by shifting the lever 29, the direction of rotation of the tens-carrying drum and the finger wheel may be reversed with respect to the direction of rotation of the actuator. llvlhen the lever 29 is in its upper position as indicated in Figure 3, the gear 34 is positioned to cause the tens-carrying drum and the *finger wheel to rotate in a direction opposite to the direction of rotation of the actuand this is the position of the parts 'the machine is used'in solving probtnvision. l

' A' lewe-rma in ,he performance sion, means are provided for dise.n

bling the automatic stopping mechanisml when the machine is to be used for solving problems in multiplication.

When the ymachine is inoperation, andis performing a problem in arithmetic, the parts controlling the rotation of the actuator are in the position shown in Figure 6, the clutch lever 16 being held out of engagement with the clutch by the clutch bar 22. The automatically operating mechanism which I employ for stopping the machine in fuil cycle position when the sign of the registration of the numeral wheels 3 changes, is effective to release the controi bar 22 from the clutch lever 16, thereby permitting the spring 18 to return the clutch lever 16 to normal position and thereby disengage the clutch and stop `the clutch housing. In the presentinstance, this is effected by quickly raising the clutch bar 22, to move the depression 21 from contact with the pin 19,

thereby removing the restraining element,

from the clutch lever and permitting the spring 18 to move said lever. The particular mechanism employed for this purpose cornprises a lever 35 fulcrumed on a fixed portion ofthe machine `and having its end 36 extending through an aperture 37 in the clutch control lever 22. Upward movement of the end 36 of the lever will disengage the clutch bar 22 from the clutch lever 16. l

The clutch lever 35 pivoted at 35 comprises part of a lever system consisting of the

levers

35 and 38, which are connected together at their adjacent ends by a slot and pin connection 40. The lever 38 is also fulcrumed on a fixed portion of the machine at 38' and due to its connection with the lever 35, the two levers move simultaneously. Upward movement of the outer end of the lever 38 will be accompanied by upward movement of the end 36 of the lever 35, and means are provided for moving the lever 38 at the proper time, to cause the lever 35 to operate to release the clutch lever 16.

The actuator comprises a series of actuator units 5, nwhich are fully disclosed in my ent No. 1,524,924: of February 3, 1925. The

present machine is provided with an actuator having nine of actuating units being provided at left of 'the actuating units with ferr overflow i" ctna'ting units, these i Eig tens-c 'i side thereof, so that the end 45 of the lever is not engaged by either pin, upon rotation of the actuator. This is the normal inoperative position of the lever 44, when the machine is being used for performing problems in divisioni The lever`44 is fulerumed on the stud 46 and is held so that the end 45 thereof lies to one side of the

pins

42 and 43 by the spring 47, whichv is connected to the ear 48 of the bracket which carries the stud 46. The lever 44 therefore has a movement of oscillation in a plane perpendicular to the axis of the stud 46 and also has a movement of oscillation, in a plane parallel to the axis of the stud 46, so that the lever 44 has a restrained limited universal movement. The tooth 45 on the upper end of the lever, normally lies to one side of the path of the

pins

42 and 43, and means are provided for moving the lever side- Wise to bring the tooth 45 into the path of the pins, when the numeral wheel 3 associated with the actuator unit 41 passes from positive to negative registration or vice versa. Associated with each numeral Wheel 3 is a tens-carrying lever 51 which cooperates with the tens-carrying pins 52 to eii'ect movement of the numeral Wheel of the next highest order. The numeral Wheel 3 which is associated with the actuator unit 41 is to the left of the operative actuating units, so that the sign of the.registration of the numeral Wheel 3 is changed only when the machine has been operated more than. the required number of times. Each numeral Wheel 3 is provided with a tooth 53 which cooperates with the tens-carrying lever 51, to move such lever backward to effect the carry to the numeral Wheel of the next highest order. In Figure 3, the numeral Wheel is shown in zero position and a movement of this wheel in a counter-clockwise direction for one step, will change the reading of the wheel from zero to nine, that is, it will' change the sign of the registration. Such movement of the numeral Wheel will cause `movement of the transfer lever 5l and such movement is employed to control the operation of the mechanism for automatically A`stopping the machine in full cycle position. Arranged on the back of the transfer lever 51 associated with the actuator unit 41, is al boss 54, and lying in contact with the boss 54 is the laterally extended end 55 of the lever 56. The boss 54 is used for the purpose of takingthe Wear which might occur at this point and the extended end 55 of the lever 56 is used to assure contact of the boss tend laterally into position behind the transfer lever of the Wheel of next lower order and is operated only by movement of the transfer lever associated with the actuator unit 41. The end 55 of the lever 56 is held in contact With the boss 54 by the spring 57 and consequently movement of the tens-carrying lever side with a cam 58 and the lever 56 normally lies immediately above the inclined surface of the cam. 'When the lever 56 is rocked on its fulcrum, it moves over the inclined surface of the cam 58, rocking the lever 44 sidewise and bringing the end 45 thereof into the path of the pins 42 and .43, so that the end of the lever 45 is struck bythe leading pin, causing the lever 44 to rock on its pivot 46. rIhe end 45 of the lever '44 is struck either by the pin 42 or the pin 43, depending upon the direction of rotation of the actuator. The lovver end of the lever 44 is in contact with the under surface of the lever 38, so that as the lever 45 is struck by the pin and rocked about the axis of the stud 46, the lever 38 and consequently the lever 35 is rocked on its pivot, raising the clutch control bar 22 and releasing the clutch lever 16,- Which then drops into engagement with the clutch housing, disengaging the clutch and stopping the housing in full cycle position. After being rocked. backward by either of the

pins

42 or 43, the lever 44 is returned to its forward position by the tension of the spring 20, which pulls the bar 22 downward, the motion being transmitted to the lever 44 through the

levers

35 and 38. This stops the actuator in full cycle position, with the end 45 of the` lever 4 4 positioned between the axes of the

pins

42 and 43 but to one side thereof, due to the return of the tens-carrying lever 5l to the position shown in Figure 3.

This mechanism for stopping the machine in full cycle position is particularly advantageous in the performance of problems in division. In performing these problems,` the actuator is rotated until the numeral Wheels at the left of the carriage'change sign, indicating that the actuator has been rotated too many times. The actuator is then rotated in a reverse direction until the wheels again change sign. By the use of the present invention the machine is brought to a stop in full cycle position when the actuator has rotated one time too many and then, by depressing the other control key, that is, the addition key, shown in my application Serial No. 62,558, the actuator is rotated once in the reverse direction and then brought automatically to a stop in 'full cycle position, due to the change of sign of the numeral Wheel at the left of the register.

Means are provided for disabling the autoy mati sto when it is desired to em )lo tl with the lever. The lever end 55 does not eX- L p i y le machine in the solution of problems in multiplication.- To shift the machine from division to multiplication, the lever 29 is moved from its upper to its lower position and the y movement of tliislever is employed to disable i erative relation with the

pins

42 and 43 and position. va projection 63 secured to the reverse rod 32,

with t-he lever 56, so thatf the automaticvstop mechanism is rendered inoperative.

Means are provided for preventing the lever 2,9 from being operated, except when the rotatable parts of the device are in full cycle This is accomplished by means of which cooperates with a recess 64 formed in the periphery of the end plate 65 of the tenscarrying drum 28. When the rotating parts of the mechanism are in full cycle position, the recess 64 is alined with the projection 63, so that the shaft 32 ymay be moved longitudinally. The projection 63 lies at the side of the plate 65 and is moved from one side to the other side of the plate when the lever 29 is moved to its opposite position. When the parts are out of full cycle position, the uninterrupted surface of the disc 65 prevents longitudinal movement of the shaft 32.

It is thus seen that in this mechanism, that A when the sign of the numeral wheels at the left of the register change from positive to negative, or vice versa, that such change of sign causes the operation of a control lever which moves an actuating lever into position to be moved by the actuator, to sto the machine in fulllcycle positioirf' The e ,ortneces-l sary to operate the tripping mechanism to` stop the machine is taken from the actuator and not from the numeial wheels, so that the numeral Wheels are relieved ofall additional strain.

I claim:

1. In a calculating machine, numeral Wheels, an actuator there or, a shaft for said actuator, and means for st pping said actuating mechanism in full cy position, including a restrained stopping member, means carried by the actuator sha t for releasing said member and means controlled by a selected numeral wheel for causing the actuatorshaft carried means to operate said releasing means.

2. In a calculating machine, numeral wheels, a reversible rotatable actuator therefor, and means for stopping the actuator in fullcycle position for either direction of rotation, including a restrained stopping member, means for releasing said member, means carried by thc actuator for operatingr said re* leasing means and means controlled by a selected numeral wheel for controlling the operation of the releasing means by the rotatable actuator.

3. In a calculating machine, reversible numeral wheels, actuating mechanism therefor having a reversible cycle of operation, and automatic means for stopping the actuating mechanism in full cycle position in .either directionof movement, including an element similarly actuated throughout aforward or a reverse cycle of movement of said actuating mechanism, a member movable into the path kof said element to stop said element by engagement therewith and means actuated by the actuating mechanism for causing the actuation of said stopping member.

4. In a calculating machine, reversible numeral Wheels, actuating mechanism therefor having a reversible cycle of operation, and

automatic means for stopping the actuating mechanism inv full cycle position in either direction of movement, including an element similarly actuated throughout a forward or a reverse cycle of movement of said actuating mechanism, a member movable into the path of said element to stop said element by engagement therewith, means actuated bythe actuating mechanism for causing the actuation of said stopping member and means controlled by a selected numeral wheel for controlling the actuation of said last named actuated means.

5. In a calculating machine, reversible numeral wheels, an actuator therefor having a reversible cycle of operation, and automatic means for stopping the actuator in full cycle position in either direction of movement, including an element similarly actuated throughout a. forward or reverse cycle of movement of said actuator, a normally energized restrained member movable into the path of said element to form an"-` abutment stop for said element and means actuated by the actuatorfor releasing said member.

6. In a calculating machine, reversible numeral wheels, an actuator therefor havinga reversible cycle of operation, and automatic means' for stopping the' actuator in full cycle yposition in either direction of movement, in-

cluding yan'. `element similarly actuated .numeral wheels, an actuator therefor, a key for controlling the connection between the motor and the actuator, and means actuated by the actuator 4and conditioned by a selected numeral wheel for stopping the actuator in full cycle position adapted to be released upon successive operation of said key.

lll

8. In a calculating machine, numeral` wheels', an actuator therefor and means for stopping said actuator including a normally energized restrained element and trigger means controlled by a selected numeral Wheel and actuated by the actuator upon rotation thereof for tripping said element.

9. In a motor driven calculating machine, numeral Wheels, an actuator therefor, a clutch interposed between the motor andy the actuator, means for disengaging theclutch and stopping the actuator including a normally energized restrained element and trigger means controlled by a selected numeral wheel and actuated by the actuator upon rotation thereof for tripping said element.

10. In a calculating machine, numeral Wheels, an actuator therefor and means for stopping said actuator in full cycle position comprising a normally restrained energized element, means actuated by movement of the actuator for releasing said element, said releasing means being normally in inoperative position with respect to the actuator and means actuated by movement of a selected numeral Wheel for moving the releasing means into operative relation with respect to the actuator.

11. In a calculating machine, numeral Wheels, an actuator therefor and means for stopping said actuator in full cycle position comprising a normally restrained energized element, means actuated by movement of the actuator for releasing said element, said releasing means being normally in inoperative position with respect to the actuator, transfer levers associated with the numeral Wheels, rotation of the numeral vWheels from O to 9 serving to move said transfer levers and means actuated by movement of a selected transfer lever for moving the releasing means into operative relation with respect to the actuator.

12. In a calculating machine, a longitudinally movable carriage, numeral Wheels rrranged on said carriage, an actuator for tie numeral Wheels immovable longitudinally,

and means for stopping the actuator in Ylull cycle position comprising a normally restrained energized element, means actuated by movement of the actuator for releasing said element, said releasing means being norially in inoperative position With respect to the actuator, transfer levers associated with the numeral Wheels and mounted on the carriage, rotation of the numeral Wheels from 0 to 9 serving to move said transfer levers and means actuated by movement of a selected transfer lever for moving the releasing means into operative relation with respect to the actuator.

13. In a calculating machine, numeral Wheels, a rotary actuator therefor, means for stopping said actuator in full cycle position including a restrained stopping member, means including anelement controlled by said numeral Wheels adapted to be operated by the actuator for releasing said member and means for moving said releasing means into inoperative position with respect to the actuator.

14. In a calculating machine, numeral Wheels, a rotary actuator therefor, means for stopping said actuator in full cycle position, mechanism associated With and actuated by the actuator for operating said stopping means and means including a manually operable element for moving said mechanism out of associated relation with the actuator.

15. In a calculating machine, numeral Wheels, a rotary actuator therefor, a counter lfor indicating the effective number of revolutions of the actuator, means operative in time with the actuator' for operating the counter, means including a control member operated by an overdraft registration of the numeral Wheels for stopping the actuator in full cycle yposition and means for reversing the direction of drive of the counter operating means and simultaneously rendering the stopping means inoperative.

16. In a calculating machine, numeral Wheels, a rotary actuator therefor, a. counter for indicating the effective number of revolutions of the actuator, means operative in time .With the actuator for operating the counter, means operated by the actuator for stopping the actuator in full cycle position and means for reversing the direction of drive of the counter operating means and simultaneously rendering the stopping means inoperative.

17. In a calculating machine numeral Wheels, a rotary actuator therefor, a counter for indicating the effective number of revolutions of the actuator, means operative in time with the actuator for operating the counter, said means being rotatable in one direction with respect to the actuator for problems in multiplication and being rotatable in the opposite direction with respect to the actuator for problems in division and means operative only when the operating means is rotatable in a direction for problems in division for causing movement of a numeral wheel from O to 9 to stop the actuator in full cycle position.

18. In a calculating machine, numeral Wheels, a rotary actuator therefor, a counter for indicating the effective number lof revolutions of the actuator, means operative in time with the actuatorfor operating the counter, a reversing gear interposed between the actuator and the counter operating means, means controlled by a selected numeral wheel for stopping the actuator in full cycle position and means for shifting the reversing gear and simultaneously rendering the control of the stopping means by the numeral Wheels inoperative.

19. In a motor driven calculating machine, reversible numeral wheels, an actuator therefor having a reversible cycle of operation, a clutch .interposed between the motor and the actuator, a single clutch control member, trip I register having reversi le numeral wheels, ac-

tuating means therefor having a reversible cycle of operation, a quotient register having reversible numeral wheels for displaying the quotient in problemskof division, an actuator for said quotient register having a reversible cycle of operation, overdraft registration control means and settable means including a manually operable member for positioning said overdraft registration coni trol means and reversing the direction of rotation of the quotient register actuator.

22. In a calculating machine, a product register having reversible numeral wheels, a reversible, rotary actuator therefor, a quotient register, an actuator for the quotient register having a reversible cycle of operation, overdraft registration control means and settable means including a manually operable member for determining the relative direction of movement of the main actuator and the quotient register actuator and positioning said overdraft registration control means.

23. In a calculating machine, numeral Wheels, anactuator therefor and means for stopping the actuator in full cycle position comprising a normally restrained energized element, means actuated by movement of the actuator for releasing said element, said releasing means includmg a lever normally in inoperative position with respect to the actuator, transfer levers associated with the numeral wheelsfa lever actuated by movement of a selected transfer lever and`means serving to cause movement of the latter lever to move said first mentioned levertransversely into operative relation with respect to the actuator.

24. In a calculating machine, numeral wheels, an actuator therefor and means for stopping the actuator in full cycle position comprising a restrained latch lever and means actuated by movement of the actuator for releasing said latch, said means comprising an abutment carried by the actuator, trigger mechanism interposedy between the abutment and the latch, said trigger mechanism including a rockable lever normally disposed out of the path of the abutment, transfer levers associated with the numeral wheels and means serving yto cause movement of a selected transfer lever to rock said rockable lever into the path of movement of the abutment.

25. yIn a motor driven calculating machine, numeral wheels, an actuator therefor, driving means for said actuator, a key for controlling the connection between the motor and the actuator, means operable by said driving means upon'being conditioned by a selected numeral whel for stopping said actuator and locking it againstI cyclic movement, adapted to be released by a. succeeding operation of said key.

26.l In a motor driven calculating machine, numeral wheels, an actuator therefor, driving means for said actuator, a key for controlling the connection between the motor andthe actuator, means operable at a fixed cyclic time by said driving means and controlled by a selected numeral -Wheel for stopping and locking said actuator against cyclic movement, adapted tobe released by a succeeding operation of said key.

In testimony whereof, I have hereunto setmy hand.

CARL M. F. FRIDEN.