US3730083A - Printing mechanism - Google Patents

Printing mechanism Download PDF

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Publication number
US3730083A
US3730083A US00098598A US3730083DA US3730083A US 3730083 A US3730083 A US 3730083A US 00098598 A US00098598 A US 00098598A US 3730083D A US3730083D A US 3730083DA US 3730083 A US3730083 A US 3730083A
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US
United States
Prior art keywords
pawl
type carrier
printing mechanism
dog
latch
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
US00098598A
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English (en)
Inventor
C Hjerpe
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Facit AB
Original Assignee
Facit AB
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Publication date
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Publication of US3730083A publication Critical patent/US3730083A/en
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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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/48—Type carrier arrested in selected position by electromagnetic means

Definitions

  • the present mvention relates to a printing mechanism for simultaneous order printing (i.e. synchronous [30] Foreign Application E)rim'ity Data printing in all denominations) for calculating Dec. 18, 1969 Sweden ..17478/69 machines or the like or for use as Output devices at data terminals or the like and provides means for [52] U.S.Cl. ..l0l/93 MN maintaining a Positive engagement between a drive [51] Int. Cl.
  • the present invention relates to a printing mechanism for calculating machines and the like or for use as output device at data terminals and the like, comprising at least one type carrier capable of different settings, setting means for the type carrier, a drive transmitting member located at the type carrier and operatively engageable with said setting means, and means for securing the type carrier during printing in a set position corresponding to a selected type.
  • the drive transmitting member at the type carrier is held in a releasable operative engagement with the setting means by a spring the tension of which must be overcome when the type carrier is arrested in the selected position and the drive transmitting member shall be moved out of its engagement with the setting means.
  • a printing mechanism of this type comprises a plurality of type carriers the spring load will become of particular significance when several or all type carriers shall be arrested in the like set-up position. In this instance the bias of all springs must be overcome simultaneously. This will involve an unfavorable impact stressing of the setting mechanism and its drive means.
  • a lag of the drive imparted to the type carrier may be caused at the beginning of the setting motion by reason of the great momentum produced when the printing mechanism is operated at great speed.
  • the drive transmitting member is positively held in engagement with the setting means by the action of a control member which is releasable through said securing means upon fixing the type carrier in a position corresponding to a selected type setting.
  • FIG. 1 is a side elevation view in partial section of one embodiment of the present invention
  • FIG. 2 is a side view of the invention as shown in FIG. 1 in a subsequent stage of operation;
  • FIG. 3 is a side view of the invention as shown in FIG. 1 in another stage of operation;
  • FIG. 4 is a side elevation view in partial section of another embodiment of the present invention.
  • FIG. 5 is a side view of the invention as shown in FIG. 4 in a subsequent stage of operation.
  • FIG. 6 is a side view of the invention as shown in FIG. 4 in yet another subsequent stage of operation.
  • Both embodiments illustrate the same basic structure in a printing mechanism, preferably a mechanism for simultaneous order printing such as the structure disclosed in US. Patent Application Ser. No. 840,203, filed July 9, 1969 by the same inventor, now US. Pat. No. 3,633,499. Only those components belonging to a single denomination and those components common to all denominations have been illustrated, insofar they are ofimportance for understanding the invention.
  • the types 1 of the printing mechanism form a complete set on each type carrier 2 and are held for longitudinal displacement in a holder 2a mounted at the type carrier.
  • Each type carrier is freely pivoted on an axle 3 common to all type carriers.
  • Axle 3 is itself pivotally mounted at its ends to a pair of vertical housing walls 50 (only one shown).
  • a setting bail 4 is provided comprising a pair of bellcrank shaped end plates 4b (only one shown), the end plates being fixed in an aligned manner to respective ends of axle 3 adjacent the inner surface of each wall 50.
  • a pair of rods 4a, 4c are mounted between the plates and extend transversely to the set of type carriers parallel to axle 3.
  • Rod 4c engages printing hammers (not shown) such as those shown in US. Pat. No. 3,633,499 referred to above and cocks them upon suitable rotation of axle 3.
  • the hammers and associated structure are not shown since such apparatus forms no part of the present invention.
  • the function of rod 4a is explained in greater detail hereinbe
  • the type carriers 2 can be swung through any angle corresponding to a selected type, and their both extreme end positions are determined by a stationary rod 5 providing a stop means for the radial edges 2e of a circumferential recess formed in the hub portion of each type carrier 2.
  • a latch member 7 is provided for each type carrier 2 and is pivotally mounted at a stationary axle 6. This latch member 7 engages in its activated position by means of a hook-shaped portion formed thereon a row of teeth 2f formed at the type carrier, said teeth being correlated to the types 1.
  • a lever 9 is pivotally mounted on a second stationary axle 8. On being swung in the clockwise direction by means of a tension spring 10 the lever 9 will rock latch member 7 counterclockwise into its activated position wherein it engages the teeth 2f.
  • a common return bail 11 for all levers 9 is pivotally mounted on the axle 6 carrying the latch members 7.
  • a drive transmitting or dog member 12 is pivotally mounted at the type carrier 2 at the hub portion thereof on a stub shaft 12d integral with the hub portion which is received by a bore formed at one end of the drive transmitting or dog member 12.
  • the drive transmitting member l2' is formed with a recess in its upper edge spaced from its pivot and engaging in the activated position of the member 12 shown in FIG. I the setting bail rod 4a.
  • the edge portion of the member 12 facing the axle 3 is shaped with an arcuate edge portion 12a. In the activated position of the member 12 illustrated in FIG. 1 this arcuate edge portion extends concentrically to the axle 3.
  • the arcuate edge 12a is engaged by the rounded top end of a shank belonging to a substantially fork-shaped pawl 13 accomodating between its prongs 13a, 13b the axle 3 which serves for guiding the pawl.
  • the latter is formed adjacent to its extremity distant from the member 12 with a hook projection which is latched on a laterally extending stud 9c provided at the lever 9 close to the axle 8.
  • the pawl 13 is sustained in its latched position by a spring 14 and is also supported against its lateral edge by the axle 8.
  • each type carrier 2 is initiated by reversing the direction of the rotation of the drive mechanism thereby reversing the direction of rotation of shaft 3.
  • the stud 9c will slide along the adjacent lateral edge of pawl 13, spring 14 being additionally tensioned and urging the pawl back toward its latched position.
  • a continued motion of the setting bail will be permitted thereby, notwithstanding that the type carrier has been arrested in its uppermost end position.
  • the return of the member 12 into active position is carried out automatically during the return motion of setting bail 4 when the rod 4a is brought into engagement within upward projection 12d formed at the member 12 (FIG. 1).
  • lever 9 is actuated by the drive transmitting member 12 with the intermediary of the pawl 13 and the stud 90.
  • a quite opposite functioning takes place in the embodiment illustrated in FIGS. 4 to 6 and shall now be described.
  • the drive transmitting or dog member denoted 15 is displaceable towards and away from the rod 4a radially of the axle 3 and is guided by the axle 3 and a lateral stud 2b extending from the type carrier 2.
  • the member 15 has an oblique cam surface 15a for engaging the rod 4a succeeded by an arcuate edge portion 15b concentric with the axle 3 in the inactive position of the member 15.
  • the opposite edge portion 15c of the member 15 is arc-shaped, as well. This edge portion is concentric with the axle 3 when the dog member 15 takes up the activated position illustrated in FIG. 4.
  • the arcuate edge portion 15c is adapted to engage slidingly one extremity of a pawl 16 that corresponds to the pawl 13 of the embodiment first described.
  • the pawl 16 engaging with an edge portion the axle 8 is formed at its extremity distant from the member 15 with a hook-shaped portion for engaging a stationary transverse rod 17 in the printing mechanism and is held in such engagement by a tension spring 18.
  • the pawl 16 furTher is provided with a laterally extending stud 16a projecting beneath an abutment surface 9d at the right hand portion of the lever 9 which is of a somewhat modified shape in comparison with the lever of the embodiment first described. In the initial position illustrated in FIG. 4 the said abutment surface 9d is located directly above the stud 16a of the pawl 16. The latter is held in locking engagement with rod 17 by the spring 18 and engages at the same time the axle 8 as well as the arcuate edge portion 15c of the dog member 15.
  • the lower arcuate surface of the dog member 15 is continued by a steppeddown portion at a less radial distance from the axle 3.
  • the edge portion 15c will discontinue by that reason its engagement with the pawl I6 when the type carrier reaches its corresponding angular position, i.e. when the type carrier is arrested in its uppermost position determined by the upper radial recess edge 2e abutting the rod 5.
  • the drive transmitting member is free to be moved away from the setting bail rod 4a, thereby permitting the continued movement of the setting bail as illustrated in FIG. 6.
  • the dog member will be brought back by the pawl 16 into its active position through the force of the spring 18 as soon as the lever 9 has resumed its position shown in FIG. 4 by the action of the return bail l l.
  • a printing mechanism comprising:
  • At least one rotatably mounted type carrier supporting a plurality of type characters thereon;
  • drive means for rotating said type carrier in a path of motion to a predetermined position associated with a particular type character including an elongate member mounted for rotation about an axis parallel to said elongate member, said elongate member extending transversely to said at least one type carrier;
  • a dog member mounted on said type carrier movable between a first position wherein it is coupled to said elongate member for movement therewith and a second position uncoupled from said elongate member, so that upon coupling, said drive means will rotate said type carrier;
  • a pawl member movable between an active and inactive position having one end contacting a surface portion of said dog member so that when said pawl member is in said active position said dog member is maintained in said first position coupled to said elongate member;
  • a printing mechanism as claimed in claim 1 comprising at least one type carrier with a shape substantially of a circular sector being pivotally supported on an axle rotatable by said elongate member, wherein the surface portion of the dog member cooperating with the pawl member is substantially coaxial with the axle of the type carrier when said dog member is in said first position.
  • a printing mechanism as claimed in claim 1, wherein the pawl member has one end portion on which is formed said means for locking said pawl in said active position and an opposite end portion, a part of which is shaped for engaging said surface portion of the dog member, which opposite end portion is pivotally and displaceably journalled on the axle of the type carnor.
  • a printing mechanism as recited in claim 1 wherein said means for locking said pawl member in the active position includes a stop formed on said latch activating engageable with hook means formed on said pawl member, said hook means being disengaged from the stop upon activation of said latch means.
  • said actuation means includes a selectively energizable electromagnet and a spring, said spring having endsconnected to said latch means and a fixed support, said electromagnet, when energized, sustaining said latch means in said first unlatched position and when deenergi zed, said spring causing said latch means to move to said second latched position.
  • a printing mechanism as recited in claim 1 wherein said means for locking said 'pawl member in the active position includes a stop formed on said latch activating means engageable with hook means formed on said pawl member, said hook means being disengaged from the top upon activation of said latch means.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Mechanical Operated Clutches (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
US00098598A 1969-12-18 1970-12-16 Printing mechanism Expired - Lifetime US3730083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE17478/69A SE336806B (enrdf_load_stackoverflow) 1969-12-18 1969-12-18

Publications (1)

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US3730083A true US3730083A (en) 1973-05-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00098598A Expired - Lifetime US3730083A (en) 1969-12-18 1970-12-16 Printing mechanism

Country Status (8)

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US (1) US3730083A (enrdf_load_stackoverflow)
JP (1) JPS5021051B1 (enrdf_load_stackoverflow)
CH (1) CH512117A (enrdf_load_stackoverflow)
DE (1) DE2062142A1 (enrdf_load_stackoverflow)
FR (1) FR2074009A5 (enrdf_load_stackoverflow)
GB (1) GB1325915A (enrdf_load_stackoverflow)
NL (1) NL7018410A (enrdf_load_stackoverflow)
SE (1) SE336806B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52115847U (enrdf_load_stackoverflow) * 1976-03-01 1977-09-02
JPS5347556U (enrdf_load_stackoverflow) * 1976-09-28 1978-04-22
JPS53144068U (enrdf_load_stackoverflow) * 1977-04-19 1978-11-14

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165922A (en) * 1936-03-23 1939-07-11 Victor Adding Machine Co Printing mechanism
US2165923A (en) * 1936-04-02 1939-07-11 Victor Adding Machine Co Rectifying means for printing mechanism
US2338943A (en) * 1938-08-25 1944-01-11 Ncr Co Interlock
US2821909A (en) * 1955-04-07 1958-02-04 Olympia Werke Ag Type control apparatus for business machines and the like
US2832283A (en) * 1955-05-23 1958-04-29 Olympia Werke Ag Selecting and actuating means for arcuate type carriers
US3232223A (en) * 1964-03-04 1966-02-01 Olympia Werke Ag Printing mechanism for business machines
US3456583A (en) * 1966-07-28 1969-07-22 Anker Werke Ag Rockable type segments in printing mechanism for business machines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165922A (en) * 1936-03-23 1939-07-11 Victor Adding Machine Co Printing mechanism
US2165923A (en) * 1936-04-02 1939-07-11 Victor Adding Machine Co Rectifying means for printing mechanism
US2338943A (en) * 1938-08-25 1944-01-11 Ncr Co Interlock
US2821909A (en) * 1955-04-07 1958-02-04 Olympia Werke Ag Type control apparatus for business machines and the like
US2832283A (en) * 1955-05-23 1958-04-29 Olympia Werke Ag Selecting and actuating means for arcuate type carriers
US3232223A (en) * 1964-03-04 1966-02-01 Olympia Werke Ag Printing mechanism for business machines
US3456583A (en) * 1966-07-28 1969-07-22 Anker Werke Ag Rockable type segments in printing mechanism for business machines

Also Published As

Publication number Publication date
JPS5021051B1 (enrdf_load_stackoverflow) 1975-07-19
SE336806B (enrdf_load_stackoverflow) 1971-07-19
DE2062142A1 (de) 1971-09-02
FR2074009A5 (enrdf_load_stackoverflow) 1971-10-01
GB1325915A (en) 1973-08-08
NL7018410A (enrdf_load_stackoverflow) 1971-06-22
CH512117A (de) 1971-08-31

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