US3544000A - Device for controlling the printing of the decimal point in a calculating machine or the like - Google Patents

Device for controlling the printing of the decimal point in a calculating machine or the like Download PDF

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Publication number
US3544000A
US3544000A US718658A US3544000DA US3544000A US 3544000 A US3544000 A US 3544000A US 718658 A US718658 A US 718658A US 3544000D A US3544000D A US 3544000DA US 3544000 A US3544000 A US 3544000A
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United States
Prior art keywords
printing
slider
decimal point
orders
controlling
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Expired - Lifetime
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US718658A
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English (en)
Inventor
Michele Bovio
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Olivetti SpA
TIM SpA
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Olivetti SpA
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C19/00—Decimal-point mechanisms; Analogous mechanisms for non-decimal notations
    • G06C19/02—Devices for indicating the point

Definitions

  • McMahon ABSTRACT In a calculating machine, wherein some typecarriers are interspersed with a group of decimal point printing elements individually selectable by a transverselymovable plate and wherein a member is variably settable for causing a predetermined number of orders to be dropped in printing the total, the plate and the members are set simultaneously by a common knob.
  • the plate is adapted to entrain a zero printing suppressing slider along the left.
  • the suppressing slider normally allows the typecarrier of the lower order to print.
  • another slider is transversely movable one step with respect to the suppressing slider for normally preventing said lower order typecarrier from printing.
  • Calculating machines are known in which a member is variably settable to permit one of the decimal point printing elements to print simultaneously with the adjacent typecarriers.
  • calculating machines in which a predetermined number of orders of the total can be dropped under the control of a variably settable member.
  • the member controlling the printing of the decimal point is independent of the member controlling the dropping of said order. Therefore this machine requires a large number of parts which make the machine complicated and costly.
  • the operator may often make a mistake setting the number of decimals and the number of orders to be dropped.
  • FIG- I is a partial longitudinal section, from the. left, of a calculating machine incorporating a device forcontrolling the printing of the'dec'ima'l point according to the invention
  • FIG. 2 is a left-hand-perspective view of a detail of FIG. 1;
  • FIG. 3 is a partial plan view of FIG. 1.
  • the device for controlling the printing of the decimal point is incorporated in a calculating machinecompri'sing a series of typecarriers adapted to print the various orders of an amount.
  • each type carrier is constituted by a typewheel 6 (FIG. I) rotatably mounted on a slider 7 slidable on two stationary rods 8 to cause the respective wheel 6 to strike against a platen 9,-but normally bearing by the action of a spring 11 against a universal bar 12.
  • the latter is carried by a pair of connecting rods 13 connected to two arms secured to a shaft 15 rotatable in the machine frame.
  • the shaft 15 is adapted to be rotated in an anticlockwise direction at each printing cycle in a known manner.
  • Each typewheel 6 is equipped with a pinion 14 constantly in
  • the calculating machine also includes a slider-28 slidable transversely on a stationary bar 29- and provided with a toothed edge 31 in engagement with a pinion 32 (FIG. 3).
  • the latter is connected to a conventional set up carriage (not shown in the drawings) in such manner that-the carriage and the slider 28 move in synchronism in the transverse direction.
  • the slider 28 is therefore shifted to the left step by step as described in the U.S. Pat. No- 3,3 l9,882.
  • the bar 21 releases the levers 18, which. are shifted under the control of the racks 26 to predispose the typewheels 6 for printing the amount represented by the racks 26.
  • the plate 36 bears against the extensions 38, while the pinion 32 (FIG. 3) is rotated in a clockwise direction, causing both the slider'28 and
  • the calculating machine moreover comprises five decimal I point printing elements, which are normally inoperative and interspersed with the first fivesliders 7 (FIG. 3) starting from the right.
  • Each of these elements is constituted by a slider 44 (FIG. I) which is also slidable on the rods 8 and normally bear under the action of a spring 48 against the universal bar 12.
  • Each slider 44 is provided with a decimal point type 47 disposed alongside .the type' of the wheel 6 which is predisposed for printing.
  • a first variably settable member for selecting one of the sliders 44 is constituted by a plate 49 slidable transversely by means of two drilled lugs 51 along a stationary bar 52.
  • the plate 49 is adapted to cooperate with a projection 54 provided on each slider 44 and is provided with of the lower order (FIG.
  • the calculating machine moreovercomprises a graduated knob 74 (FIG. 1) secured; to a pinion 76in engagement with a spring-loaded positioning member 77, Moreover, secured to the knob 74 is also a second pinion 78 in mesh with a member or rack 79 slidable on a'pair of stationary pins 75.
  • the rack 79 is variably settable for causing a predetermined number of orders of the totalizer to be dropped in printing the total. To this end, by sensing a stepped portion 80 of the rack 79, the totalizer 27 is transversely shifted to the right a number of steps equal to the digits to be dropped before taking the total in the manner described in the U.S. Pat. No. 3,397,837 with reference to the rack indicated therein by the reference 206.
  • the pinion 78 is moreover in mesh with a second rack 81 slidable on one of the pins 75 and provided at the rear with a 24 engageable by a stud 25 of a corresponding actuating rack I bent lug 82 (FIG. 3) formed with a slot 83 having a length cor. responding at least to five steps of the knob 74.
  • the slot 83 is engaged by a pin 84 fast with an arm 86 of a three-armed lever 87 and normally bearing under the action of a spring 88 against the rear end of the slot 83.
  • a second arm 89 of the lever 87 terminates in a forked end in engagement with the lug 51 on the left of the plate 49.
  • a third arm 92 of the lever 87 is adapted to cooperate with a projection 93 (FIG. 1) of a lever 94 fulcrumed on a stationary pivot 95 and adapted to be mantially located in oneof two positions, where'it is maintained by a spring-loaded positioning member 97 cooperating with a stud 99 of the lever 94.
  • the slider 59 is thus located Qwith its edge 62 immediat ly to the left of the projection 63 of fthethird slider 7.
  • W lf l'essthan three orders are set up for each factor.
  • the slider 66 releases the projection 64 (FlGS. l and 2) of the first slider 7 on the right,'while,th e edge 62 releases the projection 63 of r the following two sliders 7 and in this way the first three .typewheels 6 (FIG. 3) starting from the right are allowed to print, the third of which typewheels 6 (FIG.
  • the slider 28 moves nearer step by step withits pin 73'to 'he the lug 71 of the slider 66.
  • the pin 73 engages the lug 71, shifting the slider66 one step without effecting the slider 59.
  • the slider 59 is then carried along step by step to theleft, so that during the printing operatio'nthe-projections63 of the corresponding sliders 7 are freed from thecontrol of the edge 62.
  • the knob 74 simultaneously with the rack 81 shifts the rack 79 two steps to the rear.
  • the rack 79 is thus set for causing the totalizer 27 to be shifted to the right and equal number of steps before taking the product, thus dropping in printing the product a number of orders equal to the decimal orders of f-each factor.
  • the product is thus printed under ,the control of Ithe' sliders 66-and 59, with a number of decimal orders equal to. that of the factors, while the decimal point is printed in plate 49,:
  • the lever 94 (FIG. 1) is brought manually into the position shown bydash lines.
  • the lever 87 (FIG. 3) cannot be rocked clockwise, since the arm 92 is arrested by the projecti'on 93 (FIG. 1) of the lever 94.
  • the rack 81 is then shifted to the rear, sliding by means of the slot 83 (FIG. 3) on the pin 84 of the arm 86 of the lever 87.
  • the plate 49 therefore does not take part in the movement, while the rack 79 is predisposed for "causing the predetermined number of orders to be dropped in printing the product.
  • the first slider'7 on the right remains locked by the slider 66, while the other sliders 7 remain locked by the edge 62.
  • the pin 73 of the slider 28 engages the lug 71 and shifts the slider- 66 to the left only one step.
  • the slider 66 therefore releases theprojection 64 of the slider 7 in the lower order, which strikes the digit set against the platen 9 during the actuating cycle.
  • the plate 49 may have a plurality of notches 56 spaced three steps one from the otherto permit a plurality of sliders 44 to print the decimal point, in order to divide the amount into groups of three orders. From what has been seen hereinbefore, it is moreover apparent that the slider 59 always ensures the printing of a zero to the left of the decimal point when the amount printed does not have whole numbers.
  • a. a first member variably scttable for selecting one of said elements for printing the decimal point
  • asec'ond member variably settable for causing a predetermined number of the lowest orders to be dropped in printing said total comprising a second rack meshing with said pinion;
  • a device for controlling the printing of the decimal point having a group of normally inoperative decimal point printing elements interspersed with a group of said series of typecarriers, wherein the improvement comprises in combination:
  • a transversely movable plate provided with a notch allowing only one of said elements at a time to print the decimal point
  • a settable member variably settable for causing a predetermined number of the lowest orders to be dropped in printing said total
  • a transversely movable plate provided with a notch allowing only one of said elements at a time to print the decimal point

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US718658A 1967-04-06 1968-04-04 Device for controlling the printing of the decimal point in a calculating machine or the like Expired - Lifetime US3544000A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5121367 1967-04-06

Publications (1)

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US3544000A true US3544000A (en) 1970-12-01

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US718658A Expired - Lifetime US3544000A (en) 1967-04-06 1968-04-04 Device for controlling the printing of the decimal point in a calculating machine or the like

Country Status (6)

Country Link
US (1) US3544000A (enrdf_load_stackoverflow)
BE (1) BE713087A (enrdf_load_stackoverflow)
CH (1) CH470717A (enrdf_load_stackoverflow)
DE (1) DE1774086A1 (enrdf_load_stackoverflow)
FR (1) FR1560815A (enrdf_load_stackoverflow)
SU (1) SU362547A3 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637987A (en) * 1969-06-04 1972-01-25 Diehl Zero-printing device for calculating machines
US3875858A (en) * 1973-09-10 1975-04-08 Hugh L Clary Zero printing control for data printers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637987A (en) * 1969-06-04 1972-01-25 Diehl Zero-printing device for calculating machines
US3875858A (en) * 1973-09-10 1975-04-08 Hugh L Clary Zero printing control for data printers

Also Published As

Publication number Publication date
SU362547A3 (enrdf_load_stackoverflow) 1972-12-13
FR1560815A (enrdf_load_stackoverflow) 1969-03-21
CH470717A (fr) 1969-03-31
BE713087A (enrdf_load_stackoverflow) 1968-08-16
DE1774086A1 (de) 1971-09-09

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