US2619900A - Retracting mechanism for printing elements of business machines - Google Patents

Retracting mechanism for printing elements of business machines Download PDF

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Publication number
US2619900A
US2619900A US766771A US76677147A US2619900A US 2619900 A US2619900 A US 2619900A US 766771 A US766771 A US 766771A US 76677147 A US76677147 A US 76677147A US 2619900 A US2619900 A US 2619900A
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US
United States
Prior art keywords
printing
type
lever
carrier
elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US766771A
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English (en)
Inventor
Stuivenberg Cornelis Hendricus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DEN2098D external-priority patent/DE961139C/de
Application filed by Individual filed Critical Individual
Priority claimed from GB105648A external-priority patent/GB644154A/en
Application granted granted Critical
Publication of US2619900A publication Critical patent/US2619900A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/08—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies carried on sliding bars or rods
    • B41J1/12—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies carried on sliding bars or rods on side surfaces thereof, e.g. fixed thereto
    • B41J1/14—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies carried on sliding bars or rods on side surfaces thereof, e.g. fixed thereto the types or dies being movable relative to the bars or rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/16—Means for cocking or resetting hammers
    • B41J9/20—Springs

Definitions

  • This invention relates to business machines such as calculating, bookkeeping and similar machines, and more specifically concerns the retracting mechanism for printing elements in such business machines.
  • Business machines of the type involved comprise type carriers which are reciprocably mounted and slidably support a plurality of printing elements which are actuated by a printing hammer for causing the respective printing element to effect a printing operation. After completion of the printing operation, the respective printing element is returned to its original or inoperative position by a retracting mechanism.
  • the object of the invention is to simplify the resetting of the typeblocks and to reduce the width of the construction of the type carriers, so that a particular width of the printing mechanism can be equipped with a greater number of type carriers than up to now.
  • this object is reached because for resetting the typeblocks of each type carrier, the construction of the machine is provided with a device which is influenced by a resetting force and which is equipped independent of the movement of the type carriers.
  • the resetting bars and springs which in case of the known type carriers had been contained in the type-inset, are replaced by a device arranged separately in the construction of the machine, so that the width of the type-insets can be reduced in accordance with the rejected parts that were contained in them up to now. Consequently the type carriers of the printing mechanism according to the invention have a smaller constructional width than the known type carannexed drawing.
  • Fig. 1 shows a type-inset of a known type carrier.
  • Fig. 2 indicates the type carrier with a type-inset connected to it.
  • Fig. 3 represents a profile through the type carrier on a somewhat larger scale.
  • Fig. 4 shows a typeblock of the type carrier, also on a larger scale.
  • Fig. 5 is a printing mechanism according to the invention.
  • Fig. 6 shows a profile through two adjoining type carriers of the printing mechanism according to Fig. 5.
  • Fig. 7 illustrates another embodiment of the printing mechanism according to the invention.
  • Figs. 9 and 10 illustrate the operation of the arrangement shown in Fig. 7.
  • a type-inset 2 has been connected to the type carrier l, which inset has notches 3 for the guidance of the reciprocable typeblocks 4.
  • a bar 5 is provided, which is pressed by a spring 6 against the camshaped extensions of the typeblocks 4. If a printing bar or a printing hammer brings one of the typeblocks 4 against the printing surface, the resetting bar 5, which is under the action of the spring 6, causes the operated type block to return to its normal position after impression has taken place.
  • the bar 5 and the spring 6 within the type carrier require a relatively great width, so that a certain width of the printing mechanism allows the provision of only a limited number of type carriers.
  • the type carrier When the printing mechanism is operating, the type carrier is pushed upwards in a known manner and positioned at the types that are to be impressed. During the impression the printing hammer 20 drops against the typeblock l4 that is in printing position and strikes this block against the printing roller IS, the required impression being obtained by means of the ink ribbon l9. When the respective type block I4 is thus being moved forwardly toward the printing roller l8, it takes along the arm l5 against the thrust of spring I6. After the impression has been made, the spring 5 by means of the angle-lever l5 returns the operated typeblock back to its normal position.
  • the arm of the lever :21 that is co-operati-ng with the typeblocks M has an extended 'head provided with slant surfaces 24, 25 for retaining the type blocks M to their normal or inactive position.
  • the typeblocks M are provided with lateral extensions tor bosses 21 having inclined surfaces corresponding to and arranged for co-operation with the slant surfaces 2'4 and 25.
  • are preferably so arranged that the type blocks nearest to the ink ribbon of the printing mechanism are, when not being actuated by the printing hammer, sufliciently spaced from the ink ribbon so that a sticking of the ink ribbon through the type blocks is always avoided.
  • is taken along by the type :block which is acted .upon by the printing hammer, against the force of the spring .23, but as soon as the impression has been made and the actuating pressure .on the printing hammer has been released, the spring 23 automatically returns the respective type block H to its normal or "inactive position.
  • lever means having .a flat head portion provided with a lateral extension for engagement with any of the lateral extensions of said printing elements, said flat head portion also being provided with a beveled end surface corresponding to the beveled surface of the lateral .extensions of said printing elements .of engagement with the beveled surfaces of said printing elements if the latter during the shifting .movement of the type carrier are not in'their retracted positions, pivot means for pivotally supporting said lever means, spring means connected to said lever means for continuously urgin said lever means and the printing elementengaged thereby into a retracted position, and means operable to actuate an of said printing elements against the thrust of said spring means to bring about a printing action of the respective printing element.
  • lever means having a flat head portion provided with lateral extension means arranged to extend behind the lateral extension of atleast one of said printing elements when said carrier is :in a predetermined position, said extension means being provided with a beveled surface for engaging the first beveled surface of any adjacent printing element when the latter is not in retracted position during the movement of said carrier in one direction to thereby return the respective printingielement .to its retracted position, .andthe .end portion of said flat head portion of; said lever means bein provided with a beveled surface arranged to engage the second beveled surface of any adjacent printing element when the latter is not in its retracted position during movement of said carrier in the other direction to thereby return the respective element to its retracted position
  • a plurality of type carriers arranged side by side, a plurality of series of individually operable printing elements respectively reciprocably supported by said carriers, each printing element having a lateral extension with two oppositely inclined areas
  • a plurality of lever means having a flat head portion with a sloping end surface and with a lateral extension respectively extendin between two adjacent lever means, the lateral extensions of said lever means being provided with a beveled surface adapted to engage one of the oppositely inclined areas of said printing elements, the other one of said oppositely inclined areas being adapted to be engaged by said sloping end surface
  • pivot means separate from and supported independently of said carriers for pivotally supporting said lever means
  • spring means respectively associated with said lever means for continuously urging the same into contact with said lever means to thereby urge said lever means to move the printing elements engaged thereby into normal inactive position, and means operable to respectively actuate said printing elements to force the same into printing position against the thrust of said spring means.
  • each printing element having a lateral extension on its end opposite the printing end thereof, each extension havin an inclined surface thereon on the side toward the printing end of the element and in a plane perpendicular to the plane of the said printing elements, a stationarily pivoted lever having one end extending to a position to one side of the one of the elements in the said printing position as determined by reciprocation of said carrier, an ofiset head on the said one end of the lever engaging behind said extension, said offset head having an inclined surface portion parallel to the said inclined surfaces on the ends of the said elements, an actuator to engage the end of the element which is in said printing position to move the element in its printing direction, and a spring acting on said lever to move the lastmentioned element and which is engaged thereby, in a direction opposite to the printing direction of the element

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US766771A 1943-03-30 1947-08-06 Retracting mechanism for printing elements of business machines Expired - Lifetime US2619900A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2619900X 1943-03-30
DEN2098D DE961139C (de) 1943-03-30 1943-03-31 Bueromaschinendruckwerk
GB105648A GB644154A (en) 1948-01-13 1948-01-13 Improvements in printing mechanisms for calculating, book-keeping or similar machines

Publications (1)

Publication Number Publication Date
US2619900A true US2619900A (en) 1952-12-02

Family

ID=27211738

Family Applications (1)

Application Number Title Priority Date Filing Date
US766771A Expired - Lifetime US2619900A (en) 1943-03-30 1947-08-06 Retracting mechanism for printing elements of business machines

Country Status (2)

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US (1) US2619900A (ru)
FR (1) FR959256A (ru)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730945A (en) * 1953-12-08 1956-01-17 Underwood Corp Type bar for accounting machine
US2777746A (en) * 1955-02-24 1957-01-15 Otis Pressure Control Inc Amplifying recorder for tubing calipers
US2903962A (en) * 1956-12-31 1959-09-15 Burroughs Corp Floating spring construction for type magazine and the like
US3007400A (en) * 1958-12-04 1961-11-07 Ibm Printing apparatus and method for assembly

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1118998A (en) * 1914-12-01 Burroughs Adding Machine Co Recording mechanism.
US1121721A (en) * 1913-12-19 1914-12-22 Dalton Adding Machine Co Recording-machine.
US1548954A (en) * 1924-05-01 1925-08-11 Burroughs Adding Machine Co Recording mechanism
US1780674A (en) * 1927-03-04 1930-11-04 Tabulating Machine Co Compound type bar
US1978898A (en) * 1933-07-26 1934-10-30 Ibm Printing device
US2076713A (en) * 1935-10-25 1937-04-13 Ibm Perforated card interpreter
US2353057A (en) * 1941-04-08 1944-07-04 Ibm Printing mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1118998A (en) * 1914-12-01 Burroughs Adding Machine Co Recording mechanism.
US1121721A (en) * 1913-12-19 1914-12-22 Dalton Adding Machine Co Recording-machine.
US1548954A (en) * 1924-05-01 1925-08-11 Burroughs Adding Machine Co Recording mechanism
US1780674A (en) * 1927-03-04 1930-11-04 Tabulating Machine Co Compound type bar
US1978898A (en) * 1933-07-26 1934-10-30 Ibm Printing device
US2076713A (en) * 1935-10-25 1937-04-13 Ibm Perforated card interpreter
US2353057A (en) * 1941-04-08 1944-07-04 Ibm Printing mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730945A (en) * 1953-12-08 1956-01-17 Underwood Corp Type bar for accounting machine
US2777746A (en) * 1955-02-24 1957-01-15 Otis Pressure Control Inc Amplifying recorder for tubing calipers
US2903962A (en) * 1956-12-31 1959-09-15 Burroughs Corp Floating spring construction for type magazine and the like
US3007400A (en) * 1958-12-04 1961-11-07 Ibm Printing apparatus and method for assembly

Also Published As

Publication number Publication date
FR959256A (ru) 1950-03-28

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