US3455504A - Decimal point and zero printing mechanism for calculating machines - Google Patents

Decimal point and zero printing mechanism for calculating machines Download PDF

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Publication number
US3455504A
US3455504A US660398A US3455504DA US3455504A US 3455504 A US3455504 A US 3455504A US 660398 A US660398 A US 660398A US 3455504D A US3455504D A US 3455504DA US 3455504 A US3455504 A US 3455504A
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United States
Prior art keywords
printing
hammers
key
abutments
value
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Expired - Lifetime
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US660398A
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English (en)
Inventor
Georg Beikufner
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Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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Filing date
Publication date
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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

  • the present invention relates to a printing mechanism for calculating machines, especially of fully automatic four-species calculating machines which comprise a device adapted prior to the start of a calculating operation to be adjusted manually for printing a fixed comma or fixed point and in which the printing of the zeros on the left-hand side of a value is prevented by means of a living bridge formed by abutments and counter-abutments.
  • a comma key or period key is by means of a linkage provided in the machine and equipped with an adjusting knob moved into its effective position and is printed at the successive printing operation with the respective values.
  • an object of the present invention to provide a printing mechanism of the above mentioned calculating machine type with a device which for purposes of printing a numerical value with comma or period will automatically free the respective first printing space left of the adjusted comma or period also if it does not indicate any value.
  • abutments into engagement with counter-abutments of the printing hammers provided on the left-hand side of comma or period keys or levers, said first mentioned abutments being firmly connected to control elements which are pivotally arranged on printing hammers of the respective next higher printing section and being adjustable into an ineffective position by a control linkage adapted to move the comma or period key levers into printing position.
  • a control linkage adapted to move the comma or period key levers into printing position.
  • printing hammers 2 of a printing mechanism known per se are pivotally supported by a shaft 1 stationarily arranged in a framework.
  • the printing hammers 2 are locked in their basic or rest position by a blocking rail 5 against the thrust of springs 4 acting upon said printing hammers and having one end connected to a shaft 3 stationarily located in the frame.
  • the said blocking rail 5 engages the noses -6 of the printing hammers 2 so as to block the same but is adapted to be moved upwardly to permit the printing of a value.
  • Rotatably mounted on the printing hammers 2 are key wheels 7 which by means of adjusting wheels 8, 9, 10 are permanently operatively connected with value transfer racks 11 which are only partially shown in the drawing.
  • pa-wls 13 which, under the influence of springs 12, are adapted to engage the adjusting wheels 8.
  • the intermediate two printing hammers 2 have each pivotally mounted thereon a key lever 15, 15' respectively provided with a comma or period key 14, 14' for a possible comma or period printing.
  • the levers 15, 15' are adapted, by means of springs 16 connected thereto and to the printing hammers 2, to be tilted in their printing position in which, as indicated by the key lever 15, they engage abutments 17 of the printing hammers 2.
  • the key levers 15, 15' comprise arms 18, 18' which are engaged from below by pins 20, 20 laterally connected in levers 19, 19.
  • Levers 19, 19 are in their turn pivotally mounted on a shaft 21 stationarily located in the frame and by means of springs 22 are held in their counterclockwise tilted position in which the pins 20, 20' engage the arms 18, 18 and move the key levers 15, '15 to their ineffective position.
  • the drawing shows that key lever 15' in its ineffective position which is arranged on the fourth printing hammer 2 when counting from the left of the drawing.
  • a control member 24 is provided on a shaft 23 having a square cross-section.
  • control pin 25, 26' each, said control pins being offset with regard to each other 'by and In the illustrated position, the control pin 25 engages an arm 27 of lever 19 from below and maintains said arm in its tilted position against the thrust of spring 22. By rotating shaft 23, the control pin 25 again releases lever 19, and the control pin 26 eventually engages arm 27 of lever 19 and tilts the same in clockwise direction.
  • Shaft 23 has furthermore connected thereto a pinion 28 which through a rack 29 is coupled to a slide 30.
  • the slide 30 has an adjusting knob 31 which is adapted manually to be displaced into different positions by turning shaft 23, said positions being blocked by any standard blocking means not shown in the drawing.
  • That side of the printing hammers 2 which faces the printing roller or paper strip is provided with ears 32 which serve as abutments and cooperate with counter-abutments 33 and form a known so-called living bridge.
  • the said counter-abutments 33 are provided on entry wheels 9 of the respective next lower digit.
  • an ear 34 connected to the machine frame.
  • the counterabutments 33 are so arranged that they will occupy a blocking position behind the abutments 32 of the respective next higher printing hammers 2 when the key wheels 7 do not indicate a value or occupy zero position. In this instance, no value printing occurs after the printing hammers 2 have been released by the blocking rail 5.
  • the printing hammers 2 carrying a comma or period key lever 15, represent an exception.
  • the adjusting wheels 9 of these printing hammers 2 have counter-abutments 35 which are offset relative to the counter-abutments 33 by 180 but rotate in the same direction. These counterabutments 35 cooperate with abutments 36, 36 of the respective next higher digit in the same manner as described above and form the living bridge.
  • the abutments 36, 36 form parts or angled off ears of control members 37, 37 pivotally arranged on the respective printing hammers 2 and are held in their blocking position by springs 38 engaging the control members 37, 37'.
  • control members 37, 37 are provided with control edges or cam surfaces 39, 39 engaged by pins 20, connected to levers 19, 19, said cam surfaces being adapted to tilt the control members 37, 37 in counter-clockwise direction to make the abutments 36, 36' ineffective.
  • all printing hammers 2 are blocked in their positions shown in the drawing, and the key wheels 7 do not indicate any value while the comma or period key levers 15, 15' are held in their ineffective position by levers 19, 19'.
  • the counter-abutments 33, 35 provided on the adjusting wheel 9 pertaining thereto are moved into their ineffective position.
  • this number has to be set prior to the start of the calculation by displacing the knob 31.
  • this number has to be set prior to the start of the calculation by displacing the knob 31.
  • the control pin of the control member 24 moves into the illustrated position in which it tilts lever 19 in clockwise direction.
  • pin 20 frees the comma or period key lever 15 which, in view of spring 16, moves into printing position.
  • pin 20 engages the control edge or cam surfrace 39 of the control member 37 and tilts the same in counter-clockwise direction whereby the abutment 36 frees the respective counter-abutment 35 of the value section left of the comma or period.
  • the printing mechanism has been adjusted.
  • the pro-setting effected by the slide remains ineffective because already the fourth printing hammer 2 (when seen from the left in the drawing) is freed by turning of its introducing wheel 9.
  • the value to be printed is less than I, for instance 0.24 or 0.03
  • the first printing hammer 2 left of the period (in the drawing on the right-hand side of the period) will at any rate also be printing because its counter-abutment was already released by abutment 36 prior to the start of the calculating operation.
  • the value section left of the period is printed as zero.”
  • control pin 25 of control member 24 frees the lever 19 while the control pin'26 engages the lever 19' and adjusts the printing mechanism as mentioned above to three value sections on the right-hand side of the period by tilting the key lever 15' into its printing position and moving the abutment 36' into its ineffective position.
  • a printing mechanism for a calculating machine especially a fully automatic four-species calculating machine in which the machine comprises a plurality of printing hammers having key or digit wheels thereon, auxiliary printing members adjacent a selected intermediate adjacent pair of the printing hammers for printing periods or commas to serve as a decimal point, said printing hammers and printing members having a rest position and being moveable therefrom to carry out a printing operation, a fixed abutment adjacent the printing hammer pertaining to the leftward most or highest digit to be printed operable when the digit wheel of the said hammer is adjusted to Zero to prevent the hammer from moving into printing position, cooperating elements of abutment means on each printing hammer and the adjacent printing hammer which prints next .rightwardly thereof operable to prevent movement of any said adjacent printing hammer to printing position when the digit wheel thereon is adjusted to zero when a value is entered into the digit wheel of a printing hammer which prints to the left thereof, presettable means for making said auxiliary printing
  • a printing mechanism in which the abutment means for each printing hammer which prints immediately to the left of a said printing member comprises a first abutment element under the control of the digit wheel thereon and in effective position only when the digit wheel is adjusted to zero and a second abutment element moveably mounted on the printing hammer which prints immediately to the left, said second abutment element being normally in effective position and being moveable out of effective position, and means operated by said presettable means when moved into position for making one of said auxiliary printing members effective for pivoting the said second abutment element pertaining to the printing hammer next to the left of the said printing member into ineffective position.
  • each said second abutment element is pivoted on the respective supporting printing hammer and has a tonguelike projection thereon forming the portion which engages the pertaining first abutment element, a spring urging each second abutment element toward effective position, a cam surface on each said second abutment element, and said presettable means comprising rod-like members for engaging said cam surfaces to move said second abutment elements into ineffective position.
  • a printing mechanism in which said auxiliary printing members are spring urged toward effective position, and said rod-like members being engageable With said members and moving them into ineffective position immediately upon disengaging from the respective said cam surface and vice versa.
  • a printing mechanism in which tiltable levers are provided on which said rod-like members are mounted, and springs normally holding said levers to such position that said rod-like members engage their respective auxiliary printing members and hold the said auxiliary printing members in ineffective position.
  • said presettable means includes a tiltable shaft, and circumferentially spaced control pins carried by said shaft so arranged thereon that upon rotation of said shaft first one and then the other of said control pins engages a respective one of said tiltable levers and moves the pertaining tiltable lever into position such that its rod-like member releases the respective auxiliary printing member to effective position while simultaneously engaging the cam surface of the respective second abutment means pertaining thereto so as to move the said respective second abutment means into ineffective position.

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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)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Common Mechanisms (AREA)
US660398A 1966-08-20 1967-08-14 Decimal point and zero printing mechanism for calculating machines Expired - Lifetime US3455504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0050906 1966-08-20

Publications (1)

Publication Number Publication Date
US3455504A true US3455504A (en) 1969-07-15

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Application Number Title Priority Date Filing Date
US660398A Expired - Lifetime US3455504A (en) 1966-08-20 1967-08-14 Decimal point and zero printing mechanism for calculating machines

Country Status (4)

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US (1) US3455504A (xx)
CH (1) CH479116A (xx)
DE (1) DE1524026A1 (xx)
SE (1) SE329514B (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620446A (en) * 1969-03-18 1971-11-16 Brother Kogyo Mizuho Ku Kk Printing device for a calculating machine
US3780649A (en) * 1971-07-08 1973-12-25 Hattori Tokeiten Kk Decimal-point printing mechanism for electronic calculator
US5113759A (en) * 1989-05-15 1992-05-19 Citizen Watch Co., Ltd. Latch mechanism for small-size printer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT375439B (de) * 1980-05-27 1984-08-10 Svoboda Entwicklung Scharnierband

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486959A (en) * 1949-11-01 Calculating machine
US3051082A (en) * 1962-08-28 wagemann
US3057549A (en) * 1962-10-09 wagemann
US3080111A (en) * 1963-03-05 Gelling
US3107607A (en) * 1963-10-22 Decimal point printer calculating machines
US3221644A (en) * 1962-04-05 1965-12-07 Precisa Ag Printing device with zero suppressing means
US3260449A (en) * 1963-10-24 1966-07-12 Olivetti & Co Spa Zero printing control device for a calculating machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486959A (en) * 1949-11-01 Calculating machine
US3051082A (en) * 1962-08-28 wagemann
US3057549A (en) * 1962-10-09 wagemann
US3080111A (en) * 1963-03-05 Gelling
US3107607A (en) * 1963-10-22 Decimal point printer calculating machines
US3221644A (en) * 1962-04-05 1965-12-07 Precisa Ag Printing device with zero suppressing means
US3260449A (en) * 1963-10-24 1966-07-12 Olivetti & Co Spa Zero printing control device for a calculating machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620446A (en) * 1969-03-18 1971-11-16 Brother Kogyo Mizuho Ku Kk Printing device for a calculating machine
US3780649A (en) * 1971-07-08 1973-12-25 Hattori Tokeiten Kk Decimal-point printing mechanism for electronic calculator
US5113759A (en) * 1989-05-15 1992-05-19 Citizen Watch Co., Ltd. Latch mechanism for small-size printer

Also Published As

Publication number Publication date
DE1524026A1 (de) 1970-01-29
CH479116A (de) 1969-09-30
SE329514B (xx) 1970-10-12

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