GB1340839A - Spring-driven printing hammer arrangement - Google Patents

Spring-driven printing hammer arrangement

Info

Publication number
GB1340839A
GB1340839A GB5533872A GB5533872A GB1340839A GB 1340839 A GB1340839 A GB 1340839A GB 5533872 A GB5533872 A GB 5533872A GB 5533872 A GB5533872 A GB 5533872A GB 1340839 A GB1340839 A GB 1340839A
Authority
GB
United Kingdom
Prior art keywords
hammer
spring
pawl
pivoted
lever
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
Application number
GB5533872A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1340839A publication Critical patent/GB1340839A/en
Expired legal-status Critical Current

Links

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
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/30—Springs

Landscapes

  • Impact Printers (AREA)

Abstract

1340839 Selective printing PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 30 Nov 1972 [3 Dec 1971] 55338/72 Heading B6F Hammer impression.-The energy of a firing spring 3 is transmitted to a hammer 1 via a pawl 5, which only engages after the hammer is held in the locked position by an electromagnetically released permanent magnet 2. This enables the firing spring 3 to be tensioned after the hammer is cocked. Example 1, Fig. 1.-The force of spring 3 is exerted on the lower end of pivoted hammer 1 via a driving lever 4 pivoted at the hammer pivot M, and via the hook of pawl 5 pivoted to the lever 4. When the hammer is released, it pivots about M under the force of the spring 3, and when the lever 4 strikes stop 10, the hammer continues under its own momentum to strike type cylinder 8. This is possible, since the pawl 5 rotates about its pivot thereby disengaging from the lower end of the hammer 1 due to the eccentric weight 11. A weak spring 15 returns the pawl 5 to its initial position, and a bail 13 fixed to a continuously rotating disc 14 engages the lever 4 to re-tension the spring 3. Example 2 (Figs. 2 and 3).-The hammer is supported on parallel leaf-springs (17, 18), and a further leaf-sping (19) acts as the firing spring, transmitting its force via a pawl (20) pivoted to the hammer body (16). The pawl rotates out of the path of the leaf-spring (19), due to eccentric weight (21), when the hammer impacts the typecylinder. This allows the hammer to rebound and be relatched by the permanent magnet.
GB5533872A 1971-12-03 1972-11-30 Spring-driven printing hammer arrangement Expired GB1340839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2160032A DE2160032C2 (en) 1971-12-03 1971-12-03 Print hammer assembly with spring drive

Publications (1)

Publication Number Publication Date
GB1340839A true GB1340839A (en) 1973-12-19

Family

ID=5826921

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5533872A Expired GB1340839A (en) 1971-12-03 1972-11-30 Spring-driven printing hammer arrangement

Country Status (8)

Country Link
US (1) US3804009A (en)
JP (1) JPS5411730B2 (en)
DE (1) DE2160032C2 (en)
FR (1) FR2164202A5 (en)
GB (1) GB1340839A (en)
IT (1) IT973825B (en)
NL (1) NL7216166A (en)
SE (1) SE385414B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2256666C3 (en) * 1972-11-18 1975-06-26 Olympia Werke Ag, 2940 Wilhelmshaven Print hammer arrangement for data processing machines
US3905294A (en) * 1973-02-16 1975-09-16 Pertec Corp High speed line printing apparatus
JPS5065132A (en) * 1973-10-11 1975-06-02
JPS5714994B2 (en) * 1974-02-28 1982-03-27
JPS5340134B2 (en) * 1974-07-31 1978-10-25
US3985218A (en) * 1975-05-16 1976-10-12 Gerry Martin E Low inertia impact printing means
US4037704A (en) * 1975-07-03 1977-07-26 Ncr Corporation Actuator for a wire matrix printer and method of making
US4009655A (en) * 1975-07-07 1977-03-01 Tokyo Juki Kogyo Kabushiki Kaisha Print hammer actuation device
US4233894A (en) * 1978-06-02 1980-11-18 Printronix, Inc. Print hammer mechanism having dual pole pieces
DE2933616C2 (en) * 1979-08-20 1982-09-23 Siemens AG, 1000 Berlin und 8000 München Damping device for an electromagnetic drive designed as a hinged armature magnet system for the print hammer in a print hammer arrangement
US4324497A (en) * 1979-11-05 1982-04-13 Xerox Corporation Print hammer assembly with amplified multi-location impacts
US4327639A (en) * 1979-11-05 1982-05-04 Xerox Corporation Print hammer assembly with multi-location impacts
US4393769A (en) * 1980-12-31 1983-07-19 International Business Machines Corporation Electrostatic clutch-operated printing mechanism
US4423675A (en) 1982-03-08 1984-01-03 Hewlett-Packard Company Magnetic circuit and print hammer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB674812A (en) * 1949-11-18 1952-07-02 Ncr Co Rebound dampening devices for printing hammers
US3155033A (en) * 1961-05-29 1964-11-03 Ibm Print hammer drive mechanism
GB948980A (en) * 1961-12-20 1964-02-05 Solartron Electronic Group Improvements relating to mechanical linkages to electro-magnets
US3351007A (en) * 1965-10-18 1967-11-07 Control Data Corp Print hammer rapid reset means in high speed printers
US3587456A (en) * 1969-01-15 1971-06-28 Klaus H Jaensch High speed print hammer construction
GB1248683A (en) * 1969-01-31 1971-10-06 English Numbering Machines Improvements in or relating to printing mechanisms
US3507214A (en) * 1969-06-13 1970-04-21 Scm Corp Print hammer module apparatus
US3780648A (en) * 1969-09-02 1973-12-25 Nortec Computer Devices High speed print hammer with dynamic damper means
US3648602A (en) * 1970-04-27 1972-03-14 Avgerinos Inc Parallel input printing mechanism

Also Published As

Publication number Publication date
US3804009A (en) 1974-04-16
IT973825B (en) 1974-06-10
FR2164202A5 (en) 1973-07-27
SE385414B (en) 1976-06-28
DE2160032C2 (en) 1981-12-17
DE2160032A1 (en) 1973-06-07
JPS5411730B2 (en) 1979-05-17
JPS4865847A (en) 1973-09-10
NL7216166A (en) 1973-06-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee