US3850278A - Printing needle for a needle printing mechanism - Google Patents

Printing needle for a needle printing mechanism Download PDF

Info

Publication number
US3850278A
US3850278A US00278623A US27862372A US3850278A US 3850278 A US3850278 A US 3850278A US 00278623 A US00278623 A US 00278623A US 27862372 A US27862372 A US 27862372A US 3850278 A US3850278 A US 3850278A
Authority
US
United States
Prior art keywords
printing
armature
needle
wire
opening
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
US00278623A
Inventor
H Mihm
E Moser
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.)
Rena Bueromaschinenfab GmbH and Co
Original Assignee
Rena Bueromaschinenfab GmbH and Co
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 DE19712139256 external-priority patent/DE2139256C3/en
Application filed by Rena Bueromaschinenfab GmbH and Co filed Critical Rena Bueromaschinenfab GmbH and Co
Application granted granted Critical
Publication of US3850278A publication Critical patent/US3850278A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • B41J2/25—Print wires
    • B41J2/26—Connection of print wire and actuator

Definitions

  • a magnetically energized needle or stylus is provided for effecting mosaic printing and utilizes various ways of connection of a needle into the armature of an electromagnet.
  • the needle is made from wire having a thickened portion at one end thereof which makes possible the use of an opening in the armature large enough to be conveniently made. Same is inserted in said opening and fastened therein in any convenient manner such as by peening, the end of the armature over a tapered portion of the needle.
  • the fastening end of the needle is flattened, a hole provided therethrough and same is then pivoted to a pivoted or hinged type of driving armature.
  • Either of these methods of fastening provides a wire of desirably small diameter at the operating end thereof but large enough at the fastening end to be capable of fastening in a simple, economic and effective manner.
  • the invention relates to a printing needle for a needle printing mechanism comprising aprinting wire and armature and particularly one wherein the printing wire is connected to the armature.
  • mosaic printing mechanisms are being used increasingly.
  • the symbols are thereby formed by a dot system, preferably in a pattern 7 X dots.
  • the dots are applied by mechanically operating needles.
  • the needles are in such a system usually driven electromagnetically.
  • the needles are secured on the armature of the electromagnet.
  • a different connection of armature and printing wire consisted in drilling the opening in the armature larger, for example 1 mm. in diameter and then to fill the space surrounding the thinner printing wire. This filling can either be done by casting with a castable resin or by a capillary tube. With this technique the manufacture of an opening is easily accomplished, but it does not always provide a safe connection between printing wire and armature.
  • the 0.3mm. thin wire is supported on the base of the opening of the armature and, because of the constant hitting during writing, it can work itself into the armature of soft iron. Thus the writing needles become shorter and because the armature can now hit on the magnetic core, the system may be destroyed.
  • the purpose of the present invention consists in producing a printing needle for a needle printing mechanism of the type mentioned above which can be made in a simple manner and which will operate safely and reliably.
  • This purpose is attained according to the invention by forming the printing needle from a thickened diameter of the initial material, whereby the connecting point between printing wire and magnetic armature has dimensions exceeding the diameter of the printing wire. This makes possible the desired simplicity in manufacture and also assures a secure connection between printing wire and armature.
  • a further feature of the invention is that the armature can have an opening exceeding the printing wire diameter, into which opening the thickened end of the printing wire is inserted.
  • the printing needle is thus constructed in two parts and through the thickened end a safe holding of the printing wire in the armature is assured.
  • the printing wire is connected to the armature by compressing the edge of the opening of the armature over the tapering portion of the printing wire. This results in a simple, but very effective connection of printing wire and armature.
  • the armature and the printing needle of one piece wherein the printing wire is forged from the diameter of the armature. This also secures a simple construction of the inventive printing needle.
  • the thicker end of the printing wire which is manufactured from the thickened diameter of the initial material may be pressed flat and provided with pos itive means for connection to a hinged or pivoted armature. This too results in an easily manufacturable and functionally safe printing needle.
  • FIG. 1 is a longitudinal cross-sectional view of an electromagnet of the mosaic printing head
  • FIG. 2 is a longitudinal cross-sectional view of the printing needle with armature
  • FIG. 3 illustrates a different embodiment of the printing needle with its armature
  • FIG. 4 illustrates a printing needle for a pivoted armature magnet
  • FIG. 5 is a schematic illustration of the pivoted armature magnet with the inventive printing needle.
  • the electromagnet consists of a coil 1 with the connecting wires 2 and 3 and the ferromagnetic circuit for compressing the magnetic lines of force, which is formed of hollow core 4, flange 5 and sleeve 6.
  • a threaded zone 7 is provided for securing the electromagnet in a housing.
  • the printing needle 8 consists of the printing wire 8A fixed to the armature 9 which is pressed by means of a pressure spring 10 in rest position against a stop cap 11. An operating air gap 12 exists between the armature 9 and the hollow core 4. Upon operation of the electromagnet the printing needle 8 acts onto a writing surface 13.
  • the printing needle 8 comprises an elongate slim printing wire 8A and at its end facing away from the writing surface 13 substantially shorter, radial enlargement 20 which lies with its end 14 in the bottom of the opening 15 of the armature 16.
  • the opening edge 17 can be peened over the cone l8 joining the printing wire 8A to the needle enlargement 20. Through this the needle end 14 is firmly pressed against the bottom of said opening. The needle is thus positively held in the armature by the flanged edge. This peening can be done easily and the fastening can be checked non-destructively. Due to the enlarged support surface at the end of the opening, the printing wire 8 can no longer work itself into the armature.
  • the printing wire has a diameter of approximately 0.3 mm. and is, as illustrated, made larger in the zone of the armature opening. This larger diameter corresponds to an opening diameter in the armature which is large enough to be manufactured economically.
  • the support of the printing needle 8 on the bottom of the opening is furthermore provided over a substantially larger surface which in turn diminishes the surface pressure during hitting of the printing needle 8. This further diminishes the working of the printing wire into the armature.
  • the tapering printing wire thus makes possible through compression a positive connection between armature and printing needle.
  • the smaller diameter of the printing wire is advantageously manufactured through reduction of a thicker wire.
  • the armature 9 and the printing needle 8 entirely of one piece, i.e. integrally. From the diameter of the armature of for example approximately 3 mm., the needle is forged with a diameter of for example approximately 0.3 mm. A groove 21 in the body of the armature 9 serves in this embodiment to support a return spring.
  • the printing needle of the invention can also be used in other magnetic systems, as for example in hinged or pivoted armature magnets, as schematically illustrated in FIG. 5.
  • These pivoted armature magnets are for example used for heads with seven needles.
  • the needle is according to the invention again manufactured by forging from the enlarged end 25, wherein the thicker end is pressed flat and is provided with positive fastening means, for example a bore 26.
  • the needle 8 is connected to the pivoted armature 22 through a pin 27.
  • An operating air gap 28 is provided between the magnet and the armature.
  • the invention provides a simple manufacture for a printing needle for mosaic printing heads 1, whereby in spite of the accomplished simplicity of manufacture, there is also obtained a high operation safety and a long lifetime in operation.
  • a printing needle device for a printing mechanism comprising a printing needle and an enlarged diameter, substantially cylindrical armature adjacent one end thereof, said printing needle having an elongate, relatively small diameter printing wire and a relatively short, enlarged diameter end portion adjacent said armature, said enlarged diameter end portion terminating and being integral with -said printing wire, said printing needle including a somewhat tapered portion integrally joining said printing wire and enlarged end portion, said armature having a diameter exceeding that of said enlarged end portion, the armature having an opening which substantially exceeds the printing wire diameter, said enlarged end portion of the printing needle being inserted in said opening and substantially fully housed therein to connect with said armature, whereby to facilitate manufacture of and enhance reliability of a printing wire-armature interconnection.

Landscapes

  • Impact Printers (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

Magnetically energized needle for printing. A magnetically energized needle or stylus is provided for effecting mosaic printing and utilizes various ways of connection of a needle into the armature of an electromagnet. In one form the needle is made from wire having a thickened portion at one end thereof which makes possible the use of an opening in the armature large enough to be conveniently made. Same is inserted in said opening and fastened therein in any convenient manner such as by peening, the end of the armature over a tapered portion of the needle. In a modification the fastening end of the needle is flattened, a hole provided therethrough and same is then pivoted to a pivoted or hinged type of driving armature. Either of these methods of fastening provides a wire of desirably small diameter at the operating end thereof but large enough at the fastening end to be capable of fastening in a simple, economic and effective manner.

Description

United States Patent 1191 Mihm et al.
[4 1 Nov. 26, 1974 PRINTING NEEDLE FOR A NEEDLE PRINTING MECHANISM [75] Inventors: Hans-Peter Mihm, Munich; Erich Moser, Taufkirchen, both of Germany [73] Assignee: Rena Buromaschinenfabrik GmbH & C0., Deisenhofen near Munich, Germany [22] Filed: Aug. 7, 1972 [21] Appl. N0.: 278,623
[30] Foreign Application Priority Data Aug. 5, 1971 Germany ..2139256 [52] U.S. Cl. 197/1 R, 335/255 [51] Int. Cl B41j 3/44 [58] Field of Search 197/1 R; 335/209, 251, 335/255 [56] References Cited UNITED STATES PATENTS 2,869,455 l/l959 Knutsen 197/1 R 3,099,711 7/1963 Foley et a1. 197/1 R X 3,467,232 9/1969 Paige 197/] R 3,672,482 6/1972 Brumbaugh 197/1 R 3,690,431 9/1972 Howard 197/1 R Primary ExaminerRobert E. Pulfrey Assistant Examiner-R. T. Rader Attorney, Agent, or Firm-Woodhams, Blanchard & Flynn [5 7 ABSTRACT Magnetically energized needle for printing. A magnetically energized needle or stylus is provided for effecting mosaic printing and utilizes various ways of connection of a needle into the armature of an electromagnet. In-one form the needle is made from wire having a thickened portion at one end thereof which makes possible the use of an opening in the armature large enough to be conveniently made. Same is inserted in said opening and fastened therein in any convenient manner such as by peening, the end of the armature over a tapered portion of the needle. In a modification the fastening end of the needle is flattened, a hole provided therethrough and same is then pivoted to a pivoted or hinged type of driving armature. Either of these methods of fastening provides a wire of desirably small diameter at the operating end thereof but large enough at the fastening end to be capable of fastening in a simple, economic and effective manner.
3 Claims, 5 Drawing Figures PRINTING NEEDLE FOR A NEEDLE PRINTING MECHANISM The invention relates to a printing needle for a needle printing mechanism comprising aprinting wire and armature and particularly one wherein the printing wire is connected to the armature.
In place of recording mechanisms with a symbol storage in the form of printing type, so-called mosaic printing mechanisms are being used increasingly. The symbols are thereby formed by a dot system, preferably in a pattern 7 X dots. The dots are applied by mechanically operating needles.
The needles are in such a system usually driven electromagnetically. For this purpose the needles are secured on the armature of the electromagnet.
By subdividing a type receiving area, of such size as to correspond to the conventional typewriter type, into 35 dots, there is obtained a needle diameter in the magnitude of approximately 0.3 mm. Up to now it has been common to manufacture such printing needles from a spring steel wire by cutting same to length and then connecting same nonreleasably to the armature. This connection was usually effected by providing the armature with an opening into which the wire was introduced and then glued or soldered. This technique was disadvantageous in that it was very difficult and expensive to drill an opening of 0.3 mm. deep into the steel. Furthermore the connection by means of gluing or soldering was not safe enough so that the proper operation was not always assured.
A different connection of armature and printing wire consisted in drilling the opening in the armature larger, for example 1 mm. in diameter and then to fill the space surrounding the thinner printing wire. This filling can either be done by casting with a castable resin or by a capillary tube. With this technique the manufacture of an opening is easily accomplished, but it does not always provide a safe connection between printing wire and armature. The 0.3mm. thin wire is supported on the base of the opening of the armature and, because of the constant hitting during writing, it can work itself into the armature of soft iron. Thus the writing needles become shorter and because the armature can now hit on the magnetic core, the system may be destroyed.
The purpose of the present invention consists in producing a printing needle for a needle printing mechanism of the type mentioned above which can be made in a simple manner and which will operate safely and reliably.
This purpose is attained according to the invention by forming the printing needle from a thickened diameter of the initial material, whereby the connecting point between printing wire and magnetic armature has dimensions exceeding the diameter of the printing wire. This makes possible the desired simplicity in manufacture and also assures a secure connection between printing wire and armature.
A further feature of the invention is that the armature can have an opening exceeding the printing wire diameter, into which opening the thickened end of the printing wire is inserted. The printing needle is thus constructed in two parts and through the thickened end a safe holding of the printing wire in the armature is assured.
As a still further feature of the invention, the printing wire is connected to the armature by compressing the edge of the opening of the armature over the tapering portion of the printing wire. This results in a simple, but very effective connection of printing wire and armature.
It is also possible to construct the armature and the printing needle of one piece wherein the printing wire is forged from the diameter of the armature. This also secures a simple construction of the inventive printing needle.
In a needle printing mechanism with hinged armature magnets, according to a still further embodiment of the invention, the thicker end of the printing wire which is manufactured from the thickened diameter of the initial material may be pressed flat and provided with pos itive means for connection to a hinged or pivoted armature. This too results in an easily manufacturable and functionally safe printing needle.
The invention will be described hereinafter more in detail and in connection with the exemplary embodiments illustrated in the drawing, in which:
FIG. 1 is a longitudinal cross-sectional view of an electromagnet of the mosaic printing head;
FIG. 2 is a longitudinal cross-sectional view of the printing needle with armature;
FIG. 3 illustrates a different embodiment of the printing needle with its armature;
FIG. 4 illustrates a printing needle for a pivoted armature magnet;
FIG. 5 is a schematic illustration of the pivoted armature magnet with the inventive printing needle.
According to FIG. 1 the electromagnet consists of a coil 1 with the connecting wires 2 and 3 and the ferromagnetic circuit for compressing the magnetic lines of force, which is formed of hollow core 4, flange 5 and sleeve 6. A threaded zone 7 is provided for securing the electromagnet in a housing.
The printing needle 8 according to the invention consists of the printing wire 8A fixed to the armature 9 which is pressed by means of a pressure spring 10 in rest position against a stop cap 11. An operating air gap 12 exists between the armature 9 and the hollow core 4. Upon operation of the electromagnet the printing needle 8 acts onto a writing surface 13.
According to FIG. 2, the printing needle 8 comprises an elongate slim printing wire 8A and at its end facing away from the writing surface 13 substantially shorter, radial enlargement 20 which lies with its end 14 in the bottom of the opening 15 of the armature 16. The opening edge 17 can be peened over the cone l8 joining the printing wire 8A to the needle enlargement 20. Through this the needle end 14 is firmly pressed against the bottom of said opening. The needle is thus positively held in the armature by the flanged edge. This peening can be done easily and the fastening can be checked non-destructively. Due to the enlarged support surface at the end of the opening, the printing wire 8 can no longer work itself into the armature.
The printing wire has a diameter of approximately 0.3 mm. and is, as illustrated, made larger in the zone of the armature opening. This larger diameter corresponds to an opening diameter in the armature which is large enough to be manufactured economically. The support of the printing needle 8 on the bottom of the opening is furthermore provided over a substantially larger surface which in turn diminishes the surface pressure during hitting of the printing needle 8. This further diminishes the working of the printing wire into the armature. The tapering printing wire thus makes possible through compression a positive connection between armature and printing needle.
The smaller diameter of the printing wire is advantageously manufactured through reduction of a thicker wire.
According to FIG. 3 it is also possible to manufacture the armature 9 and the printing needle 8 entirely of one piece, i.e. integrally. From the diameter of the armature of for example approximately 3 mm., the needle is forged with a diameter of for example approximately 0.3 mm. A groove 21 in the body of the armature 9 serves in this embodiment to support a return spring.
As shown in FIGS. 4 and 5,.the printing needle of the invention can also be used in other magnetic systems, as for example in hinged or pivoted armature magnets, as schematically illustrated in FIG. 5. These pivoted armature magnets are for example used for heads with seven needles. In this arrangement, there exists the problem of providing a hinged connection between hinged armature 22 and the needle 8. The needle is according to the invention again manufactured by forging from the enlarged end 25, wherein the thicker end is pressed flat and is provided with positive fastening means, for example a bore 26. Thus the needle 8 is connected to the pivoted armature 22 through a pin 27. An operating air gap 28 is provided between the magnet and the armature.
Thus, the invention provides a simple manufacture for a printing needle for mosaic printing heads 1, whereby in spite of the accomplished simplicity of manufacture, there is also obtained a high operation safety and a long lifetime in operation.
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
l. A printing needle device for a printing mechanism comprising a printing needle and an enlarged diameter, substantially cylindrical armature adjacent one end thereof, said printing needle having an elongate, relatively small diameter printing wire and a relatively short, enlarged diameter end portion adjacent said armature, said enlarged diameter end portion terminating and being integral with -said printing wire, said printing needle including a somewhat tapered portion integrally joining said printing wire and enlarged end portion, said armature having a diameter exceeding that of said enlarged end portion, the armature having an opening which substantially exceeds the printing wire diameter, said enlarged end portion of the printing needle being inserted in said opening and substantially fully housed therein to connect with said armature, whereby to facilitate manufacture of and enhance reliability of a printing wire-armature interconnection.
2. The device of claim 1 in which said tapered portion is partly received in said opening, the edge of said armature opening being peened against said tapered portion of said printing needle and firmly connecting same to said armature.
3. The device of claim 1 in which said enlarged end portion is substantially cylindrical and said tapered portion is conical and tapers from said printing wire to said enlarged end portion, said armature being coaxial with the printing wire.

Claims (3)

1. A printing needle device for a printing mechanism comprising a printing needle and an enlarged diameter, substantially cylindrical armature adjacent one end thereof, said printing needle having an elongate, relatively small diameter printing wire and a relatively short, enlarged diameter end portion adjacent said armature, said enlarged diameter end portion terminating and being integral with said printing wire, said printing needle including a somewhat tapered portion integrally joining said printing wire and enlarged end portion, said armature having a diameter exceeding that of said enlarged end portion, the armature having an opening which substantially exceeds the printing wire diameter, said enlarged end portion of the printing needle being inserted in said opening and substantially fully housed therein to connect with said armature, whereby to facilitate manufacture of and enhance reliability of a printing wire-armature interconnection.
2. The device of claim 1 in which said tapered portion is partly received in said opening, the edge of said armature opening being peened against said tapered portion of said printing needle and firmly connecting same to said armature.
3. The device of claim 1 in which said enlarged end portion is substantially cylindrical and said tapered portion is conical and tapers from said printing wire to said enlarged end portion, said armature being coaxial with the printing wire.
US00278623A 1971-08-05 1972-08-07 Printing needle for a needle printing mechanism Expired - Lifetime US3850278A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712139256 DE2139256C3 (en) 1971-08-05 Print needle for needle printing unit

Publications (1)

Publication Number Publication Date
US3850278A true US3850278A (en) 1974-11-26

Family

ID=5815899

Family Applications (2)

Application Number Title Priority Date Filing Date
US00278623A Expired - Lifetime US3850278A (en) 1971-08-05 1972-08-07 Printing needle for a needle printing mechanism
US00336661A Expired - Lifetime US3850276A (en) 1971-08-05 1973-02-28 Delayed action torque controlled centrifugal clutch

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00336661A Expired - Lifetime US3850276A (en) 1971-08-05 1973-02-28 Delayed action torque controlled centrifugal clutch

Country Status (2)

Country Link
US (2) US3850278A (en)
GB (1) GB1343105A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016965A (en) * 1975-08-19 1977-04-12 Ncr Corporation Matrix print head and solenoid driver
US4018155A (en) * 1975-06-02 1977-04-19 Mohawk Data Sciences Corporation Ballistic print hammer assembly
US4037704A (en) * 1975-07-03 1977-07-26 Ncr Corporation Actuator for a wire matrix printer and method of making
US4051940A (en) * 1974-08-14 1977-10-04 Siemens Aktiengesellschaft Mosaic needle printer head using plunger armature solenoid arrangements
US4125336A (en) * 1976-04-08 1978-11-14 Wang Laboratories, Inc. Dot matrix printer
US4166314A (en) * 1976-03-24 1979-09-04 Siemens Aktiengesellschaft Magnetically actuated needle printing head and method of manufacture
US4200401A (en) * 1978-05-22 1980-04-29 Ledex, Inc. Print wire solenoid
US4211496A (en) * 1979-01-29 1980-07-08 Small Business Administration Printing solenoid
US4327636A (en) * 1980-07-25 1982-05-04 Dayco Corporation Apparatus for marking an elongate article
US4421025A (en) * 1981-12-21 1983-12-20 International Business Machines Corporation Spring mounted torsionally rigid print hammer mechanism
US5300908A (en) * 1990-10-10 1994-04-05 Brady Usa, Inc. High speed solenoid
US5556211A (en) * 1993-09-10 1996-09-17 Samsung Electronics Co., Ltd. 24 pin dot printer head and method of making the same
US5711622A (en) * 1996-02-16 1998-01-27 Tally Printer Corporation Printer element

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5124327A (en) * 1974-08-21 1976-02-27 Brother Ind Ltd Waiyapurintano injowaiya
US3978956A (en) * 1974-08-26 1976-09-07 General Electric Company Delayed-action centrifugal clutch transmission
US4114125A (en) * 1975-08-18 1978-09-12 O.P.O. Giken Kabushiki Kaisha Plunger type solenoid
US4016963A (en) * 1976-02-09 1977-04-12 Aspro, Incorporated Centrifugal clutch construction
US4231237A (en) * 1978-12-21 1980-11-04 General Electric Company Washing machine with delayed action drive clutch
JPS6446235U (en) * 1987-05-11 1989-03-22

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869455A (en) * 1955-12-12 1959-01-20 Bull Sa Machines Electromechanized actuating means in wire printing machines
US3099711A (en) * 1961-06-02 1963-07-30 Data Presentations Inc Printing device
US3467232A (en) * 1967-08-31 1969-09-16 Burroughs Corp Dot printing apparatus
US3672482A (en) * 1970-08-31 1972-06-27 Ibm Wire matrix print head
US3690431A (en) * 1971-06-14 1972-09-12 Centronics Data Computer Print head assembly containing solenoids

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE101740C (en) *
US1374413A (en) * 1918-02-18 1921-04-12 Webb William Hubert Controlling device for power-transmission clutches
US2338476A (en) * 1938-12-27 1944-01-04 Wittkop Elmar Centrifugal coupling
US2915159A (en) * 1944-07-08 1959-12-01 Realty Ind Corp Speed-responsive clutch
US3017005A (en) * 1958-11-04 1962-01-16 Muhlbeyer Josef Centrifugal-force controlled delayed-action transmission
US3353641A (en) * 1965-10-18 1967-11-21 Gen Motors Corp Clutch or brake unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869455A (en) * 1955-12-12 1959-01-20 Bull Sa Machines Electromechanized actuating means in wire printing machines
US3099711A (en) * 1961-06-02 1963-07-30 Data Presentations Inc Printing device
US3467232A (en) * 1967-08-31 1969-09-16 Burroughs Corp Dot printing apparatus
US3672482A (en) * 1970-08-31 1972-06-27 Ibm Wire matrix print head
US3690431A (en) * 1971-06-14 1972-09-12 Centronics Data Computer Print head assembly containing solenoids

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051940A (en) * 1974-08-14 1977-10-04 Siemens Aktiengesellschaft Mosaic needle printer head using plunger armature solenoid arrangements
US4018155A (en) * 1975-06-02 1977-04-19 Mohawk Data Sciences Corporation Ballistic print hammer assembly
US4037704A (en) * 1975-07-03 1977-07-26 Ncr Corporation Actuator for a wire matrix printer and method of making
US4016965A (en) * 1975-08-19 1977-04-12 Ncr Corporation Matrix print head and solenoid driver
US4166314A (en) * 1976-03-24 1979-09-04 Siemens Aktiengesellschaft Magnetically actuated needle printing head and method of manufacture
US4125336A (en) * 1976-04-08 1978-11-14 Wang Laboratories, Inc. Dot matrix printer
US4200401A (en) * 1978-05-22 1980-04-29 Ledex, Inc. Print wire solenoid
US4211496A (en) * 1979-01-29 1980-07-08 Small Business Administration Printing solenoid
US4327636A (en) * 1980-07-25 1982-05-04 Dayco Corporation Apparatus for marking an elongate article
US4421025A (en) * 1981-12-21 1983-12-20 International Business Machines Corporation Spring mounted torsionally rigid print hammer mechanism
US5300908A (en) * 1990-10-10 1994-04-05 Brady Usa, Inc. High speed solenoid
US5556211A (en) * 1993-09-10 1996-09-17 Samsung Electronics Co., Ltd. 24 pin dot printer head and method of making the same
US5711622A (en) * 1996-02-16 1998-01-27 Tally Printer Corporation Printer element

Also Published As

Publication number Publication date
DE2139256B2 (en) 1976-01-15
US3850276A (en) 1974-11-26
GB1343105A (en) 1974-01-10
DE2139256A1 (en) 1973-03-15

Similar Documents

Publication Publication Date Title
US3850278A (en) Printing needle for a needle printing mechanism
US4200401A (en) Print wire solenoid
US4060161A (en) Vibration dampening means for printing mechanism
KR880001159B1 (en) Ink dot printer
US4211496A (en) Printing solenoid
US4490057A (en) Print wire solenoid
US4767226A (en) Print head with wires which continuously contact the tip guide
JPS6215354B2 (en)
US4974975A (en) Armature of printing head for use in wire printer
JPH05220B2 (en)
US3734013A (en) Multiple hammer magnetic pole piece block
US3742310A (en) Apparatus for monitoring the action of electromagnetically operated printing hammers
JPH02139249A (en) Printing head
JPS58107840U (en) dot printing head
JPH0524213A (en) Impact dot head
US5174664A (en) Armature with angled bore for print needle fastening
JPS61193868A (en) Printing hammer for dot printer
JPS5842124Y2 (en) Print head for wire dot printers
JPH04310754A (en) Impact dot head
JPH02175159A (en) Printing head
JPS599900Y2 (en) Wire dot matrix printing head
JP2979730B2 (en) Impact dot head
JPH02141252A (en) Printing head
JPS63176156A (en) Wire dot head
JPS582076B2 (en) How to assemble the print head