US3714892A - Impact hammer for liner printer - Google Patents

Impact hammer for liner printer Download PDF

Info

Publication number
US3714892A
US3714892A US00082355A US3714892DA US3714892A US 3714892 A US3714892 A US 3714892A US 00082355 A US00082355 A US 00082355A US 3714892D A US3714892D A US 3714892DA US 3714892 A US3714892 A US 3714892A
Authority
US
United States
Prior art keywords
hammer
core
armature
hollow body
coil
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
US00082355A
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English (en)
Inventor
R Perry
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.)
DATA 100 (WARWICK) Inc
DATA WARWICK Inc
Data 100 Corp
Original Assignee
ODEC COMPUTER SYST Inc
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
Application filed by ODEC COMPUTER SYST Inc filed Critical ODEC COMPUTER SYST Inc
Application granted granted Critical
Publication of US3714892A publication Critical patent/US3714892A/en
Assigned to ODEC, INC., reassignment ODEC, INC., CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF THE SECRETARY OF STATE OF DELAWARE, SHOWING MERGER OF ASSIGNORS AND CHANGE OF NAME OF THE SURVIVING CORPORATION ON DEC. 4, 1974 Assignors: ODEC COMPUTER SYSTEMS, INC., A CORP. OF R.I. (MERGED INTO) DATA WARWICK, INC., A CORP. OF DE. (CHANGED INTO)
Assigned to DATA 100 (WARWICK) INC. reassignment DATA 100 (WARWICK) INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DATA WARWICK, INC.
Assigned to NORTHERN TELECOM INC. reassignment NORTHERN TELECOM INC. CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF THE SECRETARY OF STATE OF DELAWARE, SHOWING MERGER OF ASSIGNORS AND CHANGE OF NAME OF THE SURVIVING CORPORATION ON DEC. 17, 1980, EFFECTIVE DEC. 31, 1980 Assignors: NORTHERN TELECOM SYSTEMS CORPORATIO A CORP. OF MN. (MERGED INTO)
Assigned to DATA 100 CORPORATION reassignment DATA 100 CORPORATION CERTIFIED COPY OF A CERTIFICATE FILED IN THE OFFICE OF THE SECRETARY OF STATE OF MINNESOTA, SHOWING MERGER OF ASSIGNORS AND CHANGE OF NAME OF THE SURVIVING CORPORATION ON MAY 30, 1979 EFFECTIVE AY 31, 179, Assignors: NORTHERN TELECOM COMPUTERS, INC., A CORP. OF DE.
Assigned to DATA WARWICK , INC. reassignment DATA WARWICK , INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ODEC, INC.
Assigned to DATA 100 CORPORATION, A MN CORP. reassignment DATA 100 CORPORATION, A MN CORP. ASSIGNS NUNC PRO TUNC AS OF DECEMBER 31, 1977, THE ENTIRE RIGHT IN SAID PATENTS. Assignors: DATA 100 (WARWICK), INC. A DE CORP.
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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/133—Construction of hammer body or tip

Definitions

  • the hammer comprises a tapered body and [52] U.S.Cl. ..l0l/93C a hammer head P j g at approximately a right [51] Int. Cl. ..B4lj 9/38 angle from the iogitudinal dimension of h h mm r [58] Field of Search ..l01/93 C, 10; 335/220 y-
  • the h mmer body is hollow with an Opening in the back of the body.
  • the forward and backward motion of the print hammer be very rapid in order to obtain a high printing speed and neat and perfectly aligned print.
  • the hammer must obviously be so constructed that its path of travel is always the same. That is, the hammer cannot be permitted to bend sideways; the distance that it travels must always be the same; and the hammer must be so constructed that the hammer face properly strikes the anvil on every stroke.
  • This invention comprises a plastic injection molded hammer and electromagnet arrangement.
  • a nylon plastic may be utilized to fabricate the hammer.
  • the hammer body is so constructed that it is hollow with an opening in the back part of the hammer body.
  • The'coil and core of the electromagnet are positioned in the hammer body through the opening in the back of the body.
  • the hammer head is integrally formed with the body and projects at approximately a right angle from the longitudinal dimension of the body.
  • An armature is molded and embedded in the base of the hammer body in such a manner that the armature is positioned directly below the coil and core of the electromagnet.
  • a further object of this invention is to provide a whip action hammer for a line printer.
  • a still further object of this invention is to provide a plastic injection molded print hammer for line printers.
  • a further object of this invention is to provide a hammer and electromagnet combination for line printers.
  • FIG. 4 shows the hammer and electromagnet with the coil and core of the electromagnet removed from a the hammer body
  • FIG. 5 is a cross sectional view of the hammer and the coil of the electromagnet
  • FIG. 6 is a cross sectional view showing how the armature of the electromagnet is embedded and molded into the hammer body
  • FIG. 7 is a fractional cross sectional view showing in detail a portion of the hammer body
  • FIG. 8 is a side view showing the hammer in its rest position with respect to the print anvil
  • FIG. 9 is a side view showing the hammer in its intermediate position withrespect to the print anvil
  • FIG. 10 is a side view illustrating the hammer bending to strike the print anvil.
  • FIG. 11 is a fractional view of the hammer ing the taper of the hammer face..
  • the hammer of this invention comprises a hammer 1 having a body 2, a hammer head 4 and a hammer face 6.
  • the electromagnet arrangement com prises a coil 8 and a core 10 partially housed within body 2 of the hammer and an armature l2 embedded in a the base of the body.
  • FIGS. 8, 9 and 10 all show a side view of the hammer and the electromagnet combination and in addition show a print anvil 5.
  • FIG. 8 shows the hammer in its rest position;
  • FIG. 9 shows the hammer in an .intermediate position and
  • FIG. 10 shows the hammer striking print anvil 5.
  • hammer l is in its rest position and coil 8 is deenergi zed. In this position hammer face 6 is removed from anvil 5 by the rest gap A distance indicated by the arrows 77.
  • armature 12 is attracted to coil 8 and core 10 and hammer face 6 moves from its rest gap A position to a stop gap position B indicated by the arrows 7'7 in FIG. 9.
  • Hammer 1 is fabricated preferably from a nylon plastic and is formed by injection molding. While other compositions may be used, a nylon plastic of 30 percent glass filled ZYTEL nylon has been found ideally suitable for fabricating a hammer having a high degree of strength and resiliency.
  • Body 2 of hammer 1 tapers downward from the base of the body to hammer head 4. The taper in the body gives uniformity between degree of bend between hammers.
  • a major portion of body 2 is hollow and open in the back as is clearly shown in FIGS. 3,4, and 5.
  • a shelf 26 is provided across the inside of body 2.
  • Hammer head 4 projects approximately at a right angle from the narrow end of body 2 and terminates in a hammer face 6.
  • Hammer face 6 is secured by means of a pin 28 that is integrally formed with face 6 and is embedded into hammer head 4 as shown in FIG. 5.
  • the overall electromagnet structure comprises coil 8, core 10 and armature l2.
  • Armature 12 is molded and embedded into the base of body 2 as shown in FIG. 6.
  • Core 10 is essentially an H-shaped core and coil 8 is wrapped around one of the legs of the core.
  • Leads 18 are provided to energize coil 8.
  • a spring 20 is slipped over the other leg of core 10.
  • Spring 20 is so shaped that it wraps around the leg of core 10 and has arms 22 that project below core 10. Arms 22 of spring 20 wrap around and rest on the bearing surfaces 30 that are integrally formed on core 10.
  • the coil, core and spring assembly is slipped into the opening in the back of hammer body 2 and is secured to the body by means of pin 32.
  • Bearings 30 pressed into core 10 provide bearing support for pin 32, A cut out A is provided, as needed, to add resiliency in body 2.
  • the manner in which the coil, core and spring arrangement is secured in hammer body 2, is not critical since as is obvious from the above description of the operation, the pin or other securing means do not move. Therefore any suitable securing means can be utilized to secure the .coil, core and spring assembly in hammer body 2.
  • the top surface of armature 12 may be coated with a thin layer of Mylar to provide a high reluctance path to prevent the holding of armature 12 by the coil and core assembly due to residual magnetism that may be this invention provides a one part hammer that requiresnone of the prior art stop devices to stop the hammer in its movement toward the printing surface. it is easily manufactured and is relatively inexpensiveto manufacture.
  • hammer face 6 is whipped 'or thrown against anvil 5 as shown in FIG, 10 it returns to its rest position due to the resiliency of hammer body 2-.
  • Spring 20 is not used to pull the hammer away from anvil 5.
  • This spring is used to pull coil 8 and core 10 away from armatures 12 to rest position in relation to the coil 8 after the hammer head face 6 has struck the anvil 5;
  • ZYTEL nylon is a theme-plastic.
  • a plastic hammer and electromagnet combination comprising, a molded plastic hammer having a tapered hollow body open in the back and a hammer head pro- I jecting from one end of said body; and an electromagnet having an armature embedded in the base of said body and a coil and core combination partially secured inside said hollow body directly above said armature, a
  • said hammer having bearing ineans pivotally mounted on said pivot member, ledges formed inside said hollow body along said armature, a
  • a plastic hammer for a line printer comprising, a hollow body open in the back and having a base on one end and a neck portion near the other end, said body tapering downward from said base to said neck portion,
  • a hammer head integrally formed with said neck portion and projecting outward from said body, a hammer face secured to said hammer head, a shelf formed inside said body in said neck portion and a pair of ledges formedinside said hollow body near said basefan armature embedded in said base, a coil and core combination partially secured inside said hollow body above said armature, a pivot member fastened to said core and received within said hollow body, said hammer having bearing means pivotally mounted on said pivot member, a spring having two arms, and means attaching said spring to said core with said two arms slidably resting on said ledges.

Landscapes

  • Impact Printers (AREA)
  • Electromagnets (AREA)
US00082355A 1970-10-20 1970-10-20 Impact hammer for liner printer Expired - Lifetime US3714892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8235570A 1970-10-20 1970-10-20

Publications (1)

Publication Number Publication Date
US3714892A true US3714892A (en) 1973-02-06

Family

ID=22170680

Family Applications (1)

Application Number Title Priority Date Filing Date
US00082355A Expired - Lifetime US3714892A (en) 1970-10-20 1970-10-20 Impact hammer for liner printer

Country Status (10)

Country Link
US (1) US3714892A (enExample)
JP (1) JPS5129455B1 (enExample)
BE (1) BE774091A (enExample)
CA (1) CA930242A (enExample)
DE (1) DE2151296C3 (enExample)
FR (1) FR2113225A5 (enExample)
GB (1) GB1321957A (enExample)
IT (1) IT938701B (enExample)
LU (1) LU64069A1 (enExample)
NL (1) NL7114312A (enExample)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811377A (en) * 1973-01-02 1974-05-21 Ibm Impact printer
US3968744A (en) * 1975-03-03 1976-07-13 Burroughs Corporation Self-damping unitary print hammer for high speed printers
US3983806A (en) * 1973-12-10 1976-10-05 Data Products Corporation Hammer bank assembly
DE2827739A1 (de) * 1977-06-23 1979-01-25 Dh Ass Matrix-druckkopfanordnung
FR2404529A1 (fr) * 1977-09-29 1979-04-27 Interface Mechanisms Inc Dispositif d'impression par impact mecanique
US4269117A (en) * 1979-07-11 1981-05-26 International Business Machines Corporation Electro-magnetic print hammer
US4392423A (en) * 1978-02-08 1983-07-12 Hitachi, Ltd. Printing hammer driving apparatus
EP0189568A1 (en) * 1985-01-28 1986-08-06 International Business Machines Corporation Print hammer and drive for daisy wheel printer
EP0122756A3 (en) * 1983-04-19 1987-03-18 Ncr Canada Ltd - Ncr Canada Ltee Print hammer in an impact printer
EP0353444A3 (en) * 1988-08-05 1990-07-04 International Business Machines Corporation Impact printer print mechanism and method of manufacture
EP0395350A3 (en) * 1989-04-24 1991-11-27 AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. A printing apparatus
EP0601377A3 (enExample) * 1992-12-08 1994-08-03 Printronix Inc
US10557244B2 (en) * 2014-03-19 2020-02-11 Movax Oy Hammering device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532862A (en) * 1983-07-01 1985-08-06 Centronics Data Computer Corp. Print hammer bank

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001469A (en) * 1958-06-25 1961-09-26 Int Computers & Tabulators Ltd Data registering apparatus
US3149562A (en) * 1960-12-02 1964-09-22 Honeywell Regulator Co Pneumatically operable slug module in high speed printers
US3228325A (en) * 1964-03-16 1966-01-11 Wendell S Miller Magnetic actuated hammers in a line printer
US3233540A (en) * 1961-11-17 1966-02-08 Int Standard Electric Corp Line-at-a-time printer
US3301177A (en) * 1964-01-29 1967-01-31 Shepard Lab Inc Hammer firing arrangement for high speed printer
US3349696A (en) * 1965-08-16 1967-10-31 Potter Instrument Co Inc Hammer module assembly in high speed printers
US3418928A (en) * 1966-09-30 1968-12-31 Ponzano Gianluigi Stroke-adjusting and rebound-damping device for high-speed printer hammers
US3434413A (en) * 1967-01-06 1969-03-25 Int Computers & Tabulators Ltd Print hammer mechanisms for high speed printers
US3447455A (en) * 1967-09-20 1969-06-03 Honeywell Inc Print-hammer mount and fabrication method
US3513773A (en) * 1965-09-30 1970-05-26 Olivetti General Electric Spa Printing module for high speed printers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195453A (en) * 1962-12-26 1965-07-20 Potter Instrument Co Inc Magnetically actuated print hammer
US3351006A (en) * 1964-06-11 1967-11-07 Honeywell Inc Print hammer having braking means
DE1524484A1 (de) * 1965-08-16 1970-08-13 Potter Instrument Co Inc Druckhammer
DE1613163A1 (de) * 1967-04-12 1970-05-21 Ibm Deutschland Vorrichtung fuer den Antrieb eines Gliedes mit umkehrbarer Bewegungsrichtung
GB1206067A (en) * 1968-06-11 1970-09-23 Sits Soc It Telecom Siemens An electromechanical printing device for use in a printer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001469A (en) * 1958-06-25 1961-09-26 Int Computers & Tabulators Ltd Data registering apparatus
US3149562A (en) * 1960-12-02 1964-09-22 Honeywell Regulator Co Pneumatically operable slug module in high speed printers
US3233540A (en) * 1961-11-17 1966-02-08 Int Standard Electric Corp Line-at-a-time printer
US3301177A (en) * 1964-01-29 1967-01-31 Shepard Lab Inc Hammer firing arrangement for high speed printer
US3228325A (en) * 1964-03-16 1966-01-11 Wendell S Miller Magnetic actuated hammers in a line printer
US3349696A (en) * 1965-08-16 1967-10-31 Potter Instrument Co Inc Hammer module assembly in high speed printers
US3513773A (en) * 1965-09-30 1970-05-26 Olivetti General Electric Spa Printing module for high speed printers
US3418928A (en) * 1966-09-30 1968-12-31 Ponzano Gianluigi Stroke-adjusting and rebound-damping device for high-speed printer hammers
US3434413A (en) * 1967-01-06 1969-03-25 Int Computers & Tabulators Ltd Print hammer mechanisms for high speed printers
US3447455A (en) * 1967-09-20 1969-06-03 Honeywell Inc Print-hammer mount and fabrication method

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811377A (en) * 1973-01-02 1974-05-21 Ibm Impact printer
US3983806A (en) * 1973-12-10 1976-10-05 Data Products Corporation Hammer bank assembly
US3968744A (en) * 1975-03-03 1976-07-13 Burroughs Corporation Self-damping unitary print hammer for high speed printers
DE2827739A1 (de) * 1977-06-23 1979-01-25 Dh Ass Matrix-druckkopfanordnung
US4230038A (en) * 1977-06-23 1980-10-28 Helmut Falk Matrix print head assembly
FR2404529A1 (fr) * 1977-09-29 1979-04-27 Interface Mechanisms Inc Dispositif d'impression par impact mecanique
US4392423A (en) * 1978-02-08 1983-07-12 Hitachi, Ltd. Printing hammer driving apparatus
US4269117A (en) * 1979-07-11 1981-05-26 International Business Machines Corporation Electro-magnetic print hammer
EP0122756A3 (en) * 1983-04-19 1987-03-18 Ncr Canada Ltd - Ncr Canada Ltee Print hammer in an impact printer
EP0189568A1 (en) * 1985-01-28 1986-08-06 International Business Machines Corporation Print hammer and drive for daisy wheel printer
EP0353444A3 (en) * 1988-08-05 1990-07-04 International Business Machines Corporation Impact printer print mechanism and method of manufacture
EP0395350A3 (en) * 1989-04-24 1991-11-27 AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. A printing apparatus
EP0601377A3 (enExample) * 1992-12-08 1994-08-03 Printronix Inc
US10557244B2 (en) * 2014-03-19 2020-02-11 Movax Oy Hammering device

Also Published As

Publication number Publication date
NL7114312A (enExample) 1972-04-24
JPS5129455B1 (enExample) 1976-08-25
DE2151296C3 (de) 1981-11-19
CA930242A (en) 1973-07-17
DE2151296B2 (de) 1981-03-19
GB1321957A (en) 1973-07-04
BE774091A (fr) 1972-02-14
DE2151296A1 (de) 1972-04-27
IT938701B (it) 1973-02-10
FR2113225A5 (enExample) 1972-06-23
LU64069A1 (enExample) 1972-04-21

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AS Assignment

Owner name: ODEC, INC.,, STATELESS

Free format text: CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF THE SECRETARY OF STATE OF DELAWARE, SHOWING MERGER OF ASSIGNORS AND CHANGE OF NAME OF THE SURVIVING CORPORATION ON DEC. 4, 1974;ASSIGNOR:ODEC COMPUTER SYSTEMS, INC., A CORP. OF R.I. (MERGED INTO) DATA WARWICK, INC., A CORP. OF DE. (CHANGED INTO);REEL/FRAME:004006/0634

Effective date: 19741104

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Free format text: CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF THE SECRETARY OF STATE OF DELAWARE, SHOWING MERGER OF ASSIGNORS AND CHANGE OF NAME OF THE SURVIVING CORPORATION ON DEC. 4, 1974;ASSIGNOR:ODEC COMPUTER SYSTEMS, INC., A CORP. OF R.I. (MERGED INTO) DATA WARWICK, INC., A CORP. OF DE. (CHANGED INTO);REEL/FRAME:004006/0634

Effective date: 19741104

Owner name: NORTHERN TELECOM INC., STATELESS

Free format text: CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF THE SECRETARY OF STATE OF DELAWARE, SHOWING MERGER OF ASSIGNORS AND CHANGE OF NAME OF THE SURVIVING CORPORATION ON DEC. 17, 1980, EFFECTIVE DEC. 31, 1980;ASSIGNOR:NORTHERN TELECOM SYSTEMS CORPORATIO A CORP. OF MN. (MERGED INTO);REEL/FRAME:004006/0661

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Free format text: CERTIFIED COPY OF A CERTIFICATE FILED IN THE OFFICE OF THE SECRETARY OF STATE OF MINNESOTA, SHOWING MERGER OF ASSIGNORS AND CHANGE OF NAME OF THE SURVIVING CORPORATION ON MAY 30, 1979 EFFECTIVE AY 31, 179,;ASSIGNORS:NORTHERN TELECOM COMPUTERS, INC., A CORP. OF DE.;SYCOR, INC. A CORP. OF DE. (MERGED INTO);REEL/FRAME:004006/0654;SIGNING DATES FROM

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Free format text: ASSIGNS NUNC PRO TUNC AS OF DECEMBER 31, 1977, THE ENTIRE RIGHT IN SAID PATENTS;ASSIGNOR:DATA 100 (WARWICK), INC. A DE CORP.;REEL/FRAME:004064/0078

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Free format text: ASSIGNS NUNC PRO TUNC AS OF DECEMBER 31, 1977, THE ENTIRE RIGHT IN SAID PATENTS.;ASSIGNOR:DATA 100 (WARWICK), INC. A DE CORP.;REEL/FRAME:004064/0078

Effective date: 19820902