US2658684A - Factor entering means - Google Patents

Factor entering means Download PDF

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US2658684A
US2658684A US2658684DA US2658684A US 2658684 A US2658684 A US 2658684A US 2658684D A US2658684D A US 2658684DA US 2658684 A US2658684 A US 2658684A
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arm
drive
actuator
register
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06CDIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C23/00Driving mechanisms for functional elements
    • G06C23/02Driving mechanisms for functional elements of main shaft

Description

Nov. 10, 1953 H. GANG FACTOR ENTERING MEANS 4 Sheets-Sheet 1 Filed Jan. 20, 1950 m/vlf/v ro/e hE/GMAN (SANG ATTORNEY Nov. 10, 1953 H. GANG FACTOR ENTERING MEANS 4 Sheets-Sheet 2 Filed Jan. 20, 1950 G RM WW WM WM ATTOR/VEV Nov. 10, 1953 H. GANG 8,6
FACTOR ENTERING MEANS Filed Jan. 20, 1950 4 Sheets-Sheet 5 INVENTOR HERMAN GANG ATTORNQV Nov. 10, 1953 H. GANG 2,658,684
' FACTOR ENTERING MEANS Filed Jan. 20, 1950 4 Sheets-Sheet 4 IN l E N TOR HERMAN c /vc ATIQRNEV Patented Nov. 10, 1953 FACTOR ENTERING MEANS Herman Gang, Livingston, N. J assignor to Monroe Calculating Machine Company, Orange, N. J a corporation of Delaware Application January 20, 1950, Serial N 0. 139,635
8 Claims. 1
The invention relates to factor entering means for calculating machines and more particularly to means for registering a value in the productdividend register of such a machine without a registration in the multiplier-quotient register thereof and for otherwise conditioning the machine for subsequent operation.
Calculating machines are commonly provided with a multiplier-quotient registering mechanism which is in effect a counter and which eiiects either an additive or subtractive registration during each registering cycle of the productdividend actuating mechanism. A dividend value entered on the keyboard may be transferred to the product-dividend register by a single additive cycle of the machine and normally a count of one Will be registered in the multiplier-quotient register when this is done. The result of a subsequent dividing operation also will be registered in the multiplier-quotient register and therefore before the initiation of such an operation, the single count in that register must be removed; or means must be provided to prevent the count upon entry of the dividend.
The devices of the present invention provide improved and simplified means for transferring a value set on the keyboard to the product-dividend register while preventing a count in the multiplier-quotient register and for otherwise conditioning the machine for subsequent operation.
To achieve the above, a normally effective actuator for the multiplier-quotient register is so designed that its operation may be rendered ineffective. The single depression of an operating key is utilized to effect a single registering operation of the machine, to adjust disabling devices to prevent the effective operation of the counter actuator, and to adjust devices to control the operation of keyboard clearing mechanism. The invention, however, will best be understood from the following description with reference to the accompanying drawings in which:
Fig. 1 is a left side elevation of a calculating machine embodying the invention and showing the drive and control means for the actuating mechanism.
Fig. 2 is a vertical section through the carriage and keyboard of the machine showing the actuating mechanism.
Fig. 3 is a right side elevation of the machine showing the devices of the invention in normal position.
Fig. 4 is a detailed right side elevation showing 2 the devices of the invention in an operated position.
Fig. 5 is a fragmentary plan view of the keyboard clearing mechanism.
Registering mechanism The invention is shown as applied to a motor operated calculating machine in which differential clutch mechanism I (Fig. 1) is adapted to drive the actuating mechanism either forwardly or reversely substantially in accordance with the disclosure of U, S. Patent No. 1,566,650, issued to George C. Chase on December 22, 1925.
Normally the gearing comprising both Working legs of the differential drive i rotates idly as described in the aforenoted patent and no movement is transmitted to drive gear 2 (Fig. 1) for the actuating mechanism. The working legs of the differential drive are selectively arrested by means of a clutch lever 3 fulcrumed on the frame at l and movable to neutral, additive, and subtractive settings. Clockwise movement of the clutch lever from neutral (Fig. 1) will position it to additive setting in which a hook arm 5 of said lever will engage a lug upon gear 6 forming one leg of the differential drive, thereby interrupting its rotation and causing drive gear 2 for the actuating mechanism to be rotated. Conversely, counterclockwise movement of lever 3 will position it to subtractive setting in'which a hook arm I of said lever Will engage stop 8 for the other leg of the differential to interrupt its rotation and cause drive gear 2 to be rotated in the reverse direction.
Drive gear 2 (Fig. 1) for the actuating mechanism is fixed on a shaft 9 which extends across the machine and exteriorly of the right side frame (Fig. 3) where another gear IE] is fixed on the shaft. Gear H], through a suitable train (as shown in Fig. 3), drives shafts I! and I2 on which tens transfer actuators I3 and differentially settable actuators I4 (Fig. 2) respectively are mounted for the product-dividend register comprising numeral wheels IS.
A counter actuator [6 (Figs. 2 and 4) for the multiplier-quotient register comprising the numeral wheels ll is driven from shaft 1 l on which the tens transfer actuators I3 are mounted and is thereby adapted to register a count either additively or subtractively for each registering cycle of the product-dividend actuating mechanism.
The product-dividend register comprising wheels [5 and the multiplier-quotient register comprising wheels I! are mounted in a shiftable carriage l8 (Fig. 2). Product-dividend wheels I5 are driven by their actuating mechanism through intermediate gears l9 mounted in the body of the machine and one of multiplierquotient wheels I1, depending on the position of the carriage, is directly driven by the counter actuator I6. Carriage l8 may be denomationally shifted either manually or by suitable motor driven mechanism having no relation to this invention and therefore not shown.
Selection mechanism is provided for entering values in differential actuators l4. Such mechanism comprises denominational rows of spring retracted settable ordinal keys 25 of keyboard 26. Keys 25, upon depression, adjust setting bails 2! (Fig. 2) and thereby adjust differential acuiators M to the desired setting. A bail 28 (Figs. 2 and 5) is related to each of the rows of keys 25 and upon depression of a related key operates to latch said key against retraction. Suitable keyboard clearing mechanism (to be described) may be operated simultaneously to move all of the latching bails and thereby release any set keys 25.
Registration is controlled by a plus bar 29 and a minus bar 36 (Figs. 3 and 4). The bars are spring retracted and their stems extend downwardly in spaced relationship exterior-1y of the right side frame. A pair of links 32 are each pivotally attached at one of their ends to the "stems of the bars respectively and the other ends of the links have a common slot and pin connection with an upstanding crank 33 fixed on rock shaft 34. Shaft 34 extends across the machine and at the inner side of the left side frame is coupled to a setting plate 35 (Figs. 1 and 2). Setting plate 35 is provided with spaced shoulders 35' which are adapted to engage a pin 36 on clutch lever 3.
Upon depression of plus bar 29, its link 32 will operate through crank 33 to rock shaft 34 in clockwise direction (Figs. 3 and 4). Setting plate 35 coupled to shaft 34 will therefore be rocked like direction (Fig. 2) and counterclockwise as viewed in Fig. 1. A shoulder 35' of setting plate 35 will accordingly engage pin 35 and thereby move clutch lever 3 to its additive setting. Depression of the minus key will. through its link 32-, operate to rock shaft 34 in the opposite direction and therefore move setting plate to effect the subtractive setting of cluch lever 3. Upon movement of clutch lever 3 to either of its active settings, a pin 31 (Fig. l) on said lever will operate to depress one arm of a lever 38, thereby raising its other arm to close the contacts of a circuit breaker 39 for the motor.
Upon release of the plus bar 29 or the minus key 30, setting plate 35 will be restored to its normal position (Figs. 1 and 2) by a centralizing spring 4|) and by the movement of shaft 34 to normal as the released key is raised by its spring. This return movement of plate 35 will result in the setting of drive terminating means which will operate to bring the parts to rest in full cycle position upon completion of the current operating cycle of the actuating mechanism as follows.
Setting plate 35 (-Fig. l) is provided with opposed cam faces and when said plate is rocked in the drive initiating operation, one or the other of the cam faces will engage a roller 4| to depress the rearwardly extending arm of the roller carrying lever 42 from the position shown in Fig. 1. A .pawl 43 also mounted on the rearward arm of lever '42 will be moved downwardly and spring urged into position beneath a shoulder of a trig ger 3| which normally engages and holds a spring urged pawl 44, mounted on a stop arm 24, in inactive position. Arm 24 is pivotally mounted on the left side frame, and having common pivotal mounting therewith is another arm 22. Arm 22 has link connection 2| with a crank 20 fixed on the tens transfer actuator shaft Therefore, arm 22 is rocked, from the full cycle position shown in Fig. l, forwardly and return during each operating cycle of the registering mechanism.
When setting plate 35 is restored to its normal position, the rearward arm of lever 42 will be released and suitable springs will return the lever to normal position, thereby causing pawl 43 to raise trigger 3| and release pawl 44. Trigger 3|, however, will be only momentarily raised as pawl 43 will be engaged by a fixed pin on the frame to move it to its normal position out of engagement with the shoulder of the trigger. When the parts move through full cycle position upon completion of the current operating cycle. released pawl 44 will drop in front of a shoulder 45 of rock arm 22 thu connecting the drive to arm 24 which will be rocked forwardly with arm 22 and into engagement with a fixed stop '46 to prevent further rotation of the parts.
In the movement of arm 24 against stop 43, one or the other of two opposed cam faces of an extension 41 of the arm will engage a pin 48 of clutch lever 3 thereby moving said lever to neutral position. The parts will then rebound in the reverse direction to full cycle position where they will be arrested by a locator cam 49 (Fig. :3) on the tens transfer actuator shaft I I. Furthermore, upon rebound of the parts from stop 46. pawl 44 will be reengaged with trigger 3| which will move said pawl to its normal position out of engagement with shoulder 45.
K eybo'cwd clearing mechanism The machine is provided with repeat key '50 and non-repeat key 5| (Figs. 3 and 4). Depression of non-repeat key 5| conditions an element or arm 52 which is thereby rendered operable to cause clearing of the keyboard at each cycle of machine operation. Depression of the repeat key operates only to unset the non-repeat key and thereby remove the conditioning means. keyboard clearing means may, therefore, be con-- sidered normally ineffective as arm 52 alone in association with its operating means is ineffective to perform the clearing operation.
Arm 52 (Figs. 3 and 4) has slot and pin mounting at its lower end on the right side frame and at its upper end the arm engages an arm of a bell crank 53 as best shown in Fig. 5. With the repeat key depressed (Fig. 3), the lower end of arm 52 is unrestrained and therefore is permitted movement to the left by gravity or by engagement of rotatable contact member 54 with a cam surface of the arm. Thus, no movement will be transmitted to the upper end of arm 52 upon rotation of contact member 54 which is operated in time with the actuating mechanism.
Contact member 54 is driven by a gear 55 which terminates a train extending from the actuator driving means as shown in Fig. 3. The drive from gear 55 to contact member 54 :is effected by a lost motion arrangement comprising a pin 55 which engages one side or the other of the contact member, depending u on the direction of retation. This arrangement so relates the contact member to the drive that it rotated into position to engage arm 52 near the end of eachv registering cycle regardless of the direction of rotation.
Upon depression of the non-repeat key 5|, a lever 51, to which the stem of the key is attached, will be rocked clockwise from the position shown in Fig. 3. The rightmost end of lever 51 will engage and move the lower end of arm 52 to the right and thus position the cam surface of the arm in the path of movement of contact member 54. This enabled position of arm 52 is shown in Fig. 4 although the adjustment has been shown as effected by other means (to be described). Therefore, contact member 54 in its rotation will move the upper end of arm 52 toward the left and rock bell crank 53 clockwise from the position shown in Fig. 5. Bell crank 53 engages the end of spring retracted slide 58 which extends across the machine and which is provided with upstanding lugs engaging the respective latching bails 28. Slide 58 will therefore be moved by bell crank 53 and with it all of balls 28 will be moved to release any set keys on the keyboard.
Dividend entering means Depression of a special operation key 60 (Figs. 3 and 4) initiates the dividend entering operation and for convenience will be termed the dividend key. Dividend key 60 has pin and slot mounting on the side frame adjacent to and exteriorly of repeat key 50. The stem of the dividend key is connected at its lower end to the leftwardly extending arm of a bell crank Bl which has common pivotal mounting with lever B! to which the repeat and non-repeat keys 5%, 5| are connected. One end of a link 62 is connected to the depending arm of bell crank GI and extends toward the rear of the machine where its other end is attached to the depending arm of a lever 63 which is fulcrumed on the machine frame. The other arm of lever 63 extends upwardly with its free end adjacent a pin 64 (Figs. 3 and 4) which is related to counter-actuator [6. The free end of the lever 63, when adjusted for engagement of pin 64 (Fig. 4), provides disabling means for the counter-actuator (to be described).
Pivotally mounted at its rearmost end and at the point of attachment of link 62 with lever 63 is a device or forwardly extending plate 85. Plate 65 has an integral upwardly extending irregularly shaped arm 66 having a shoulder 66 normally engaging a pin 32 on link 32 of the stem of the plus bar 29. A spring 61 attached to a bracket 68 and to 2. lug at the lower edge of plate 65 urges said plate in clockwise direction, thereby holding the upper edge of the plate adjacent its forward and free end into engagement with a lug 68' formed in the forward or left end of the bracket 68 (Fig. 3). Therefore plate 65, restrained from further clockwise movement by lug 68', will be urged toward the front of the machine (Fig. 3) and with it link 62, thereby normally maintaining lever 63 and bell crank 6| in clockwise position and dividend key 6c in raised position. Therefore, upon depression of dividend key 60, bell crank 6| will be rocked in counterclockwise direction, thereby moving link 62 and plate 65 toward the rear of the machine.
In the rearward movement of plate 55, the shoulder 66' of arm 66 engaging pin 32 will move and hold link 32 downwardly toward the right, thereby rocking crank 33 to initiate additive operation of the machine and incidentally depressing plus bar 29. To maintain the parts in adjusted position until the end of the operation,
unitary latching means including shoulder 65' (Fig. 3) is provided in the upper edge of plate 65 adjacent its free end. Upon movement of plate 65 to the rear, shoulder 65' will be carried to the rear of the lug 68 on bracket 68, thereby allowing clockwise movement of the plate to engage the shoulder with the lug as shown in Fig. 4.
So that the keyboard will be cleared for the setting of another factor after the dividend entering operation, means are provided for render-- ing the keyboard clearing means operable regardless of the setting of repeat and non-repeat keys 50, 5|. Such means comprises a camming extension Bl integral with bell crank 6! to which dividend key at is connected. When the dividend key is in raised position (Fig. 3) extension Bl Will be ineifectively located with relation to a pin 52 at the lower end of keyboard clear arm 52. When, however, key Bil is depressed (Fig. 4), extension (55' Will engage pin 52' and move the lower end of arm 52 toward the right, thereby conditioning said arm for operation by contact member 54 in the manner described in connection with non-repeat key 5|.
Upon depression of dividend key 60, lever 63, which is connected to link 62 will be rocked in counterclockwise direction to position its free end beneath pin 54 as shown in Fig. 4. The counteractuator [6 (Figs. 2 and 4) which, as will be described, is disabled by the engagement of pin 64 by lever 63 during the dividend entering operation, is operated by a cam 69 mounted on tenstransfer actuator shaft ll. Normally, a plate Til, pivotally mounted at 10' on the inner side frame and spring urged in counterclockwise direction, engages the bottom of the counter-actua tor and renders its operation effective. When theparts are in full cycle position (Fig. 2), the high. portion of cam 69 engages the bottom and side edges of a rectangular opening H in the counter-- actuator thereby holding said actuator in central and lowered position. A fixed pin 12 engages a guide slot 13 extending upwardly from the top of the rectangular opening H thereby permitting upward and pivotal movement of the actuator. Upon initial movement of cam 69 the finger iii of the actuator will be rocked either to the right or left, depending upon the direction of rotation of the cam. As cam 69 is further rotated. spring urged plate Iii will move the actuator upwardly with the bottom edge of rectangular opening H following the cam to its low portion. The finger l6 will thus be moved into engagement with a tooth of a gear ll with which each of wheels l! of the multiplier-quotient register is provided. Finger it will then be rocked reversely of its initial movement to move gear ll" one step, thereby effecting a count in the related wheel l7. Actuator [6 will then be moved downwardly against the urge of plate it and rocked back to its normal position.
It will be noted that cam is ineffective to transmit upward movement to actuator If) for the reason that rectangular opening "H is of such dimensions that its upper edge is removed from engagement with the cam. Therefore, if the actuator is released from the upward urge of plate 16, it will be ineifectively rocked in its lowered position by cam 69. The actuator I6 is released from the urge of plate 10 by the aforedescribed adjustment of disabling lever 63 to a position beneath pin 64 which is mounted on the plate and extends outward through an opening in the side frame. During the additive registering cycle initiated upon depression of dividend key 60, plate 10 will be restrained from movement by pin 64 engaging the free end of lever 63. Therefore, no registration will be effected in the multiplierquotient register.
Provision is made to limit the registration to a single cycle and thereupon permit the restoration of the parts to normal. This terminating operation is effected by a pin 14 (Figs. 3 and 4) mounted on gear I5 of the train extending from the actuator drive and which, upon additive operation, is driven in the direction indicated. Near the end of the registering cycle, as shown in Fig. 4, pin 14 Will engage a cam edge at the upper end of arm 66 thereby rocking said arm and plate 65 downwardly. Latching shoulder 65, therefore, Will be moved from engagement with lug 68 and all of the parts will be restored by spring 6'! to the normal position shown in Fig. 3. Thus, the plus bar and the related parts will be released to terminate the operation, the counter-actuator will be reenabled, and the conditioning means for keyboard clear arm 52 will be removed.
Should dividend key 60 be held depressed until pin 14 engages arm 66, the registering operation will be terminated although the restoration of the other parts will not be effected until the re- Ilease of the key. Upon downward movement of arm 65 and plate 65 by .pin 74, shoulder 66 of arm 66 will be moved from engagement with pin 32 on link 32 of the plus key. The plus key will therefore be released and pin 32' will be moved into position above shoulder 66, thereby preventing upward movement of arm 66 to reengagelatching shoulder 65 of plate 65. Upon release of the dividend key and the resulting forward movement of the parts, shoulder 66' will be moved to the front of pin 32' and then plate 55 will be allowed upward movement to locate the parts in normal position.
Provision is made to further condition the machine for operation after the dividend entering operation. In the performance of a dividing operation, in which the divisor is set in the keyboard after the entrance of the dividend, it is essential for the machine to be adjusted for re-- peated cycles of operation without clearing the keyboard. Accordingly, a lug G0 on the stem of dividend key 60 is positioned above a lug 50 on the stem of repeat key 50. Thus, upon depression of the dividend key, the repeat key also will be depressed should it be in unset position, and upon retraction of the dividend key, the setting of the repeat key will be unaltered.
Although the devices. of the invention are particularly applicable in controlling a calculating machine in the registration of a value to be used as a dividend, it will be obvious that the devices may be adapted for the control of other registration. It will be understood, therefore, that the invention is not to be restricted tov the specific embodiment and application herein disclosed, except as required by the spirit of the appended claims.
I claim:
1. In a motor driven calculating machine having an accumulator register, actuating mechanism for said register, a counter register, an actuator for said counter register, drive means for effecting cyclic operation of said actuating mechanism and of said counter actuator, and drive control devices including a freely retractabledrive control member movable to initiate operation of said drive means and upon retraction eiiective to terminate the operation upon completionof the current operating cycle of said actuating mechanism; normally ineffec tively positioned means adjustable into position to disable said counter actuator, a device operable to move and thereafter hold said drive con trol member in drive initiating position, a depressible operation key, an operating train for adjusting said disabling means to effective position and for operating said device upon depression of said key, spring means for restoring said disabling means and said device, unitary latching means for holding said disabling means and said device in operated position, and a contact member operable by said drive means during the initiated cycle of said actuating mechanism to release said latching means.
2. In a motor driven calculating machine having an accumulator register, actuating mechanism for said register, a counter register, an actuator for said counter register, drive means for efiecting cyclic operation of said actuating mechanism and of said counter actuator, and drive control devices including a freely retractable drive control member movable to initiate operation of said drive means and upon retraction effective to terminate the operation upon completion of the current operating cycle of said actuating mechanism; normally ineffectively positioned means adjustable into position to disable said counter actuator, an adjustable device operable to move and thereafter hold said drive control member in drive initiating position, a depressible operating key, an operating train for adjusting said disabling means to effective position and for operating said device upon depression of said key, spring means for restoring said disabling 4. In a motor driven calculating machine having an accumulator register, actuating mechanism for said register, a counter register, an actuator for said counter register, drive means for effecting cyclic operation of said actuating mechanism and of said counter actuator, and drive controldevices including a freely retractable drive control member movable to initiate operation of said drive means and upon retraction effective to terminate the operation upon completion of the current operating cycle of said actuating mechanism; normally inef fectively positioned means adjustable into position to disable said counter actuator, an adjustable device operable to move and thereafter hold said drive control member in drive initiating position, a d'epressible operation key, linkage connectingv said key with said disabling means and with said adjustable device for adjusting said disabling means to effective position and =for operating said adjustable device upon depression of said key, spring means for restoring said key, unitary latching means for holding said key in depressed position, and a contact member operable by said drive means during the initiated cycle of said actuating mechanism to release said latching means and to move said adjustable device from holding position and thereby release said drive control member.
5. In a motor driven calculating machine having an accumulator register, actuating mechanism for said register including differentially settable actuators, means for entering values in said actuators including settable numeral keys, means for latching said keys in set position, a counter register, an actuator for said counter register, drive means for effecting cyclic operation of said actuating mechanism and of said counter actuator, and drive control devices including a freely retractable drive control member movable to initiate operation of said drive means and upon retraction effective to terminate the operation upon completion of the current operating cycle of said actuating mechanism; disabling means for said counter actuator adjustable to effective or ineffective position, a normally ineffective element adapted for conditioning and thereupon operable to release said numeral keys from said latching means, a member settable to condition said key releasing element, spring means normally urging said disabling means to ineffective position and said conditioning member to its unset position, a depressible operation key, an operating train for setting said conditioning member, adjusting said disabling means to effective position and moving said drive control member to drive initiating position upon depression of said key, a latch for preventing retraction of said key, and contact devices operable by said drive means during the initiated cycle of said actuating mechanism to release said latch and to operate said key releasing element.
6. The invention according to claim characterized by the provision of a second member settable to condition the numeral key releasin element and wherein the operation key is provided with means for unsetting said second conditioning member.
7. In a motor driven calculating machine having an accumulator register, actuating mechanism for said register, a counter register, an actuator for said counter register, drive means for effecting cyclic operation of said actuating mechanism and of said counter actuator, and drive control devices including a freely retractable drive control member movable to initiate operation of said drive means and upon retraction effective to terminate the operation upon completion of the current operating cycle of said actuating mechanism; normally inefiectively positioned means adjustable into position to disable said counter actuator, an adjustable device operable to move and thereafter hold said drive control member in drive initiating position, .a depressible operating key, an operating train for adjusting said disabling means to effective position and for operating said device upon depression of said key, spring means for restoring said disabling means and said device, latching means for holding said disabling means and said device in operated position comprising a lug engageable by a shoulder on said device upon movement of said device to operated position, and a contact member operable by said drive means during the initiated cycle of said actuating mechanism to adjust said device thereby moving said shoulder from engagement with said lug.
8. The invention according to claim 7 wherein the adjustment of the device by the contact member is effective to move said device from holding position and thereby release said drive control member.
HERMAN GANG.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,381,898 Andersso-n June 21, 1921 2,034,085 Chase Mar. 17, 1936 2,150,578 Chase Mar. 14, 1939 2,160,361 Hilder May 30, 1939 2,227,785 Kottmann Jan. 7, 1941 2,252,621 Eichler Aug. 12, 1941 2,273,237 Baldwin Feb. 17, 1942 2,366,345 Machado Jan. 2, 1945 2,403,273 Friden et al. July 2, 1946 2,483,459 Grip Oct. 4, 1949 2,488,011 Grip et a1. Nov. 15, 1949
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833467A (en) * 1958-05-06 Calculating machine-
US2931568A (en) * 1960-04-05 Factor entering means
US3098609A (en) * 1950-11-06 1963-07-23 Realty Ind Corp Calculating machine driving mechanism and the like

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Publication number Priority date Publication date Assignee Title
US1381898A (en) * 1919-06-03 1921-06-21 Andersson Wictor Oskar Julius Calculating-machine
US2034085A (en) * 1936-03-17 Calculating machine
US2150578A (en) * 1939-03-14 Calculating machine
US2160361A (en) * 1939-05-30 Calculating machine
US2227785A (en) * 1941-01-07 Calculating machine having means
US2252621A (en) * 1941-08-12 Calculating machine
US2273237A (en) * 1942-02-17 Register
US2366345A (en) * 1945-01-02 Revolution counter control
US2403273A (en) * 1946-07-02 Calculating machine
US2483459A (en) * 1949-10-04 Calculating machine
US2488011A (en) * 1949-11-15 Calculating machine

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2273237A (en) * 1942-02-17 Register
US2034085A (en) * 1936-03-17 Calculating machine
US2150578A (en) * 1939-03-14 Calculating machine
US2160361A (en) * 1939-05-30 Calculating machine
US2227785A (en) * 1941-01-07 Calculating machine having means
US2252621A (en) * 1941-08-12 Calculating machine
US2366345A (en) * 1945-01-02 Revolution counter control
US2403273A (en) * 1946-07-02 Calculating machine
US2483459A (en) * 1949-10-04 Calculating machine
US2488011A (en) * 1949-11-15 Calculating machine
US1381898A (en) * 1919-06-03 1921-06-21 Andersson Wictor Oskar Julius Calculating-machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833467A (en) * 1958-05-06 Calculating machine-
US2931568A (en) * 1960-04-05 Factor entering means
US3098609A (en) * 1950-11-06 1963-07-23 Realty Ind Corp Calculating machine driving mechanism and the like

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