US2744686A

US2744686A - Tens transfer device for calculating machines and the like

Info

Publication number: US2744686A
Application number: US312364A
Authority: US
Inventors: Grip Erik Konrad
Original assignee: Individual
Current assignee: Atvidaberg Facit AB
Priority date: 1951-10-11
Filing date: 1952-09-30
Publication date: 1956-05-08
Anticipated expiration: 1973-05-08

Description

May 8, "1956 E. K. GRIP 2,744,686

TENS TRANSFER DEVICE FOR CALCULATING MACHINES AND THE LIKE Filed Sept. 50; 1952 2 Sheets-Sheet l //VVENTO Er/A' Kori/"046 7)? A TTOFPNEYS E. K. GRIP May 8, 1956 TENS TRANSFER DEVICE FOR CALCULATING MACHINES AND THE LIKE Filed Sept. 30, 1952 2 Sheets-Sheet 2 N VE N 7'01? f i/r Konrad ATTORNEYS United States Patent TENS TRANSFER DEVICE FOR CALCULATING MACHINES AND THE LIKE Erik Konrad Grip, Atvitlaberg,

Sweden, assignor to Aldic' bolaget Atvidaberg-Facit,

Atvidaberg, Sweden Application September 30, 1952, Serial No. 312,364

Claims priority, application Sweden October 11., 1951 7 Claims. c1. ass-14s;

128=4 is carried out in the following manner:

The first numeral or digit (1) is not registered, as it is beyond the capacity of the accumulator. The device according to the invention renders it possible to use a very simple register or accumulator, while simultaneously attaining the advantages of a driving mechanism which solely operates only in the additive direction. Addition and subtraction of a number set in each denominational order is effected by displacing the register axially relative to the rotor or actuator of the machine, so that in relation to each other they assume one of two calculating positions, representing addition and subtraction respectively. In the device according to the invention the same tens transfer elements are used for both positions, which means a substantial simplification of the machine so that a small and compact construction is attained.

An embodiment of a device according to the invention as applied to a machine of the pin wheel type is described below and illustrated in the drawing. Referring now to the drawings, Fig. l is a cross-section through the pin Wheel rotor or actuator of the machine and the elements cooperating with said rotor.

Fig. 2 is a section along the line ll-II in Fig. 1.

Fig. 3 is a longitudinal sectional view through the pin wheel rotor, when said pin wheel rotor assumes the position of subtraction in relation to the register.

Fig. 4 is a view analogous to Fig. 3 but showing the rotor in its position of addition.

Fig. 5 is a detailed view of a modified embodiment of a tens transfer pin according to the invention.

The rotor or actuator 1 is displaceably mounted axially on its driving shaft 2. A spline 3 prevents the rotor from rotating in relation to the shaft and causes it to follow the rotation of the shaft. The rotor 1 consists of a number of calculating discs 5 provided on a rotor tube 4. At one end said tube has a flange 4a and the calculating or actuator discs 5 are secured to the tube by means of a nut 7 which also clamps an end disc 6 serving to move the rotor one denominational order at a time. The rotor is provided with actuator pins 8, each mounted on a pivot 9 which is secured in the calculating disc 5. The pins 8 are rockable in grooves in the disc 5.

In the first, or lowest denominational order, calculating disc of the rotor, ten calculating pins 8 are provided, nine pins being provided in the other discs. All the discs except the first are also provided with a tens transfer pin 11 mounted on a pivot 10. A plate or leaf spring 12 tends to turn said pin clockwise in Fig. 3. The tens transfer pins 11 are in a manner known per se arranged in a helical line for elfecting a through tens transfer.

Setting discs 13 are rotatably journalled 0n the calculating discs 5, said setting discs being provided with cam slots 13a which guide the calculating pins 8. Each setting disc is latched in its separate positions by a ball stop or latch 14 which cooperates with holes 1312 in the setting discs 13. In addition a locking rail 15 is provided for locking the discs to prevent them from being turned in relation to the discs 5 when the rotor rotates, that is during the calculating operations.

An accumulator is carried by two shafts 16 and 17 on which guide plates 18 are attached. These plates are held in their respective axial positions by

guides

19, 20, 21 and 22. The shafts 16 and 17 and the guides 19-22 are carried in well-known manner by the machine frame.

The digit or numeral wheels 23 of the register are each provided with ten teeth and mounted on a shaft 24. Each numeral wheel is in mesh with an intermediate wheel 25 which is also provided with ten teeth and mounted on a shaft 26. The intermediate wheel and thus also its numeral wheel are locked by a latching hook 28 mounted on a shaft 27 and actuated by a hook spring 29.

The intermediate wheel 25 carries a tens transfer tooth 2511, which, when the numeral wheel is turned by an amount corresponding to the angle between the numerals 9 and 0, actuates a tooth 30a on a transfer hook 3t}. Said hook then is turned counter-clockwise to its transfer position, and then the transfer pin 11 is brought into mesh with a curve or cam 30b on the transfer hook (see Fig. 2). When the hook assumes its normal position, the transfer pin 11 passes freely below the curve 301) of the transfer hook 30 and is not actuated by said curve. The transfer hook is latched in its two positions in known manner by a ball stop 32, 33.

When the tens transfer pin has passed by the intermediate wheel, the transfer hook is restored to its position of rest by a rotating shaft 34 which by means of a spline 35 strikes against a projection on the transfer hook. The shafts 34 and 2 are interconnected via gear wheels and rotate at the same number of revolutions in the direction indicated by arrows in Fig. 1.

In the guide plates 18 a cam 18:: is formed the function of which is to guide the tens transfer pin 11, so that said pin, when passing the intermediate wheels 25, has the same position axially in relation to said intermediate wheels and to the transfer hooks 36 respectively, both in the position of addition and in the position of subtraction. This is particularly clear from Fig. 3 for the disc C, and from Fig. 4 for the disc C.

in Fig. 5 a modified guide for the tens transfer pin is shown. Said pin is mounted on its pivot 19 close by the shaft 2 which is provided with radial grooves 40 cooperating with a ball guide 4-1 or the like acting on a projection 42 on the tens transfer pin 11, as shown. When in this case the rotor is moved in the axial direction to its position of addition, the pin will be rocked or tilted correspondingly.

in well-known manner the setting rotor is shiftable i. e. axially displaceable between the various denominational orders and in each denomination it is shiftable between a position of addition and a position of subtraction, which positions are spaced axially a half step from each other, that is half of the distance between the central planes of two adjacent numeral wheels. in each denominational order the position of subtraction is located to the left and the position of addition to the right.

The device functions in the following way:

For setting a digit the disc 13 is turned to the position corresponding thereto. The calculating pins 8 thus actuated then are rocked from the position shown for the disc A inPigsJB and 4 to the position shown for the disc B. That portion 'of" the calculating 'pin" that -actuates the register is then moved axially a distance corresponding to the distance between the position of addition and theposition of subtraction.

Theposition of the calculating pin when the digit 1 has been set is seen from Figure '1. Fig. 3 shows that in the position of subtraction those pins which are not set, operate on the corresponding intermediate wheel, while-those pins which are set pass freeiy'by. In the position of addition the conditions are the reverse which can be seen fromFig. 4. Besidesflt is evident from what is stated above that in the position of addition each numeral wheel is turned a number of-teethcorresponding to the number of pins 3 set-on the disc 5 in the same denomination. In the position of subtraction the numeral wheel will instead berotated for all denominations, nine steps less the number of pins set, except in the first or lowest denomination in which the numeral wheel is rotated ten steps less the number of pins set, because the disc in the lowest denomination has ten teeth whereas the other discs have but nine teeth. From the following example of a machine with a capacity of six denominational orders it can be seen that in the minus position addition is carried out by adding the complement of the numeral set.

Say that the item set is: 2307.

In the position of addition the calculating operation is: +2307.

In the position of subtraction the calculating operation is: +997693=(l)002307. As mentioned in the example stated in the preamble the first figure (l) is not registered as it is beyond the capacity of the register. Thus,.the register indicates the result: OO2307.

The tens transfer is to a large extent based on well known principles. As mentioned above the transfer hook 30 is moved to its working or operative position by the tooth 25a-when the numeral wheel passes from the value 9 to the-value 0. In Fig. 1 and also in Fig. 3 for the denomination C and in Fig. 4 for thedenomination C this tooth is shown in the position it assumes for the numeral 0. In the operative position of the transfer hook 30 its curve 30b will push the transfer pin 11 aside so that its calculating projection 11a willengage the intermediate wheel 25 and turn it one tooth in well-known manner. This position is shown in Fig. 3 for the denomination D and in Fig. 4, for the denomination D from which it is evident that the same result will be obtained at addition as well as at subtraction.

The rotor 1 may be driven manually or by a motor, and the device according to the invention may be applied to electrical as well as to manual machines. In the embodiment described above the shifting to different denominations is effected by shifting the rotor 1, but said rotor may as Well be stationary in the axial direction, while the register is shifted stepwise in the manner usual in machines of the Odhner type.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A tens transfer device for calculating machines of the type in which subtraction is effected by adding the complement of an item to be accumulated, in which a rotor is displaced axially relative to the accumulator wheels to set the machine for addition or subtraction, the rotor pins effective on the accumulator wheels in the subtractive position being those unoperated when the item is set in the rotor, comprising; in combination, "a'tenstr'ansfer pin for each denominational order except the lowest, means mounting said pins on said rotor for limited axial movement relative thereto, means for causing each transfer pin to follow a predetermined'path adjacent the accumulator wheel of the next higher order during at least a portion of the rotation of said rotor, said means causing said transfer pins to follow the said paths whether the machine is set for addition or subtraction, and means associated with each accumulator wheel to move the transfer pin associated with theparticular denominational order from said predetermined path into the path of the wheel of next higher denominational order.

2. A device as claimed in claim 1, characterized in that means for causing said transfer pins to follow the same predetermined path adjacent said accumulator wheels comprises cam means fixed to the rotor shaft, and means urging said transfer pins into contact with said cam means.

3. A device as claimed in claim 1, characterized in that said means for moving the transfer pins'out of the predetermined path into the path of the accumulator wheel of the next higher denominational order, comprises a cam radially movable into the said predetermined path upon movement of the accumulator wheel from its 9 to its 0 position.

4. A device as claimed in claim 1, characterized in that said transfer pins are pivotally mounted on the rotor disks adjacent the centers thereof, the radially outermost end of said transfer pins moving in a substantially axial path.

5. A device as claimed in claim 4, characterized in that the radially outermost end of said pin makes contact with said path determining means and with said means for moving the pin out of the predetermined paths and further characterized in that a portion of said pin radially inward from the remote end thereof engages with the associated accumulator wheel.

6. A device as claimed in claim 1, characterized in that said means for causing said transfer pins to follow predetermined paths comprises a cam for each denomination order, each said cam being fixed on a guide plate of the accumulator carriage and means urging the transfer pins axially into contact with respective ones of said cams.

7. In a calculating machine of the pinwheel rotor type, means for rotating the rotor in a single direction for addition as well as subtraction, an accumulator, means for shifting said accumulator axially relative to said rotor, and means for moving the pins of the'rotor axially to represent an entered number, the pins which have not been set representing the complement of the entered number whereby when the rotor is axially displaced to one of its positions relative to the accumulator, numbers set in the rotor are entered additively into the accumulator, while in the other axial position of the rotor relative 'to the accumulator, the unset teeth of the rotor enter the complement of the set number additively into the accumulator, to thus subtract the set number.

References Cited in the He of this patent UNITED STATES PATENTS 2,569,804 Deutsch Oct. 2, 1951