GB1481297A - Electromagnet - Google Patents

Electromagnet

Info

Publication number
GB1481297A
GB1481297A GB8691/76A GB869176A GB1481297A GB 1481297 A GB1481297 A GB 1481297A GB 8691/76 A GB8691/76 A GB 8691/76A GB 869176 A GB869176 A GB 869176A GB 1481297 A GB1481297 A GB 1481297A
Authority
GB
United Kingdom
Prior art keywords
armature
cylindrical
poleshoes
magnetic
moulded
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
GB8691/76A
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 GB1481297A publication Critical patent/GB1481297A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • 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
    • B41J2/27—Actuators for print wires
    • B41J2/285—Actuators for print wires of plunger type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

Abstract

1481297 Electromagnets PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 4 March 1976 [7 March 1975] 08691/76 Heading H1P An electromagnet for a matrix printer (Fig. 1) comprises two hollow cylindrical poleshoes 1, 3 coaxially aligned and of magnetizable material separated by an intermediate non-magnetic coaxial ring 5 of e.g. brass, all held in fixed spatial relationship by a cylindrical thermoplastic cylindrical connecting member 7 together with an excitation coil 9 on the member 7 as a former. Cylindrical armature 11 is slidable within the poleshoes for downward displacement on energization against restoring spring 13. A non-magnetic support of the armature comprises a cylindrical central portion 17 between flanges 19, 21 with magnetic cylinder 23 carried by the annulus; the flanges serving as guides within the poleshoes. On de-energization the armature is biased by spring 13 against cylindrical abutment 25 and recording pin 27 is carried by, e.g. brass holder 29 of the armature. Flange 21 has a dependent flexible skirt 31 into which holder 29 is snapped. Circumferential grooves 35, 37 of poleshoes 1, 3 anchor member 7 of e.g. GRP which is moulded in position the coil being moulded in or subsequently wound. PTFE or polyisomerates may be used for the armature support which is longitudinally grooved to collect extraneous particles. The entire armature may be of magnetizable material.
GB8691/76A 1975-03-07 1976-03-04 Electromagnet Expired GB1481297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2509917A DE2509917C3 (en) 1975-03-07 1975-03-07 Electromagnet

Publications (1)

Publication Number Publication Date
GB1481297A true GB1481297A (en) 1977-07-27

Family

ID=5940696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8691/76A Expired GB1481297A (en) 1975-03-07 1976-03-04 Electromagnet

Country Status (8)

Country Link
JP (1) JPS51113160A (en)
CA (1) CA1067566A (en)
DE (1) DE2509917C3 (en)
FR (1) FR2303360A1 (en)
GB (1) GB1481297A (en)
IT (1) IT1074453B (en)
NL (1) NL167539C (en)
SE (1) SE404737B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218572A (en) * 1988-05-09 1989-11-15 Lay Soo Chang Electromagnetically operated baby cradle rocking apparatus
US5071267A (en) * 1986-08-14 1991-12-10 U.S. Philips Corporation Actuation magnet for a printing stylus of a matrix printer
GB2335796A (en) * 1998-03-12 1999-09-29 Poramaste Jinupun Solenoid

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137513A (en) * 1977-10-27 1979-01-30 Ncr Corporation Matrix print wire solenoid
JPS5488549U (en) * 1977-12-06 1979-06-22
EP0217969A1 (en) * 1985-09-28 1987-04-15 Mannesmann Tally Ges. mbH Plunger-type core for frequencies up to 3,000 Hz and more
DE19727414A1 (en) * 1997-06-27 1999-01-07 Bosch Gmbh Robert Method of manufacturing a solenoid for a valve and valve with a solenoid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1972124U (en) * 1967-08-11 1967-11-09 Binder Magnete K G ACTIVATION MAGNET.
JPS557930B2 (en) * 1972-07-07 1980-02-29

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5071267A (en) * 1986-08-14 1991-12-10 U.S. Philips Corporation Actuation magnet for a printing stylus of a matrix printer
GB2218572A (en) * 1988-05-09 1989-11-15 Lay Soo Chang Electromagnetically operated baby cradle rocking apparatus
GB2218572B (en) * 1988-05-09 1991-08-07 Lay Soo Chang Electronically operated baby cradle rocking apparatus
GB2335796A (en) * 1998-03-12 1999-09-29 Poramaste Jinupun Solenoid
GB2335796B (en) * 1998-03-12 2002-04-10 Poramaste Jinupun Variable reluctance solenoid

Also Published As

Publication number Publication date
DE2509917A1 (en) 1976-09-09
IT1074453B (en) 1985-04-20
DE2509917B2 (en) 1978-02-23
CA1067566A (en) 1979-12-04
SE404737B (en) 1978-10-23
JPS51113160A (en) 1976-10-06
FR2303360B1 (en) 1981-09-04
NL7602174A (en) 1976-09-09
SE7602427L (en) 1976-09-08
FR2303360A1 (en) 1976-10-01
NL167539B (en) 1981-07-16
DE2509917C3 (en) 1978-10-26
NL167539C (en) 1981-12-16

Similar Documents

Publication Publication Date Title
US2915681A (en) Magnet assemblies
US4363980A (en) Linear motor
US3728654A (en) Solenoid operated plunger device
US5268662A (en) Plunger type electromagnet
EP0380693B1 (en) Plunger type electromagnet
US3091725A (en) Electro-magnetic device
ATE89098T1 (en) ELECTROMAGNET WITH A PLUNGER ANCHOR.
GB1481297A (en) Electromagnet
US4555192A (en) Release type dot printer head
GB1220769A (en) Printing units
US2798581A (en) Solenoid operated coil clutch mechanism
US2722636A (en) Magnetic apparatus
US2858487A (en) Dust-tight d. c. solenoid assemblies
US3348178A (en) Solenoid actuated device
GB1228539A (en)
GB1535010A (en) Reversible direction solenoid actuator assembly
EP1430588B1 (en) Linear voice coil actuator with a latching feature
CA1045897A (en) Printer head
JPS57195339A (en) Objective lens driver
GB1509673A (en) Direct current electro-magnet
US2841258A (en) Magnetic clutch
GB1350614A (en) Electromagnetic actuating device
US2862100A (en) Magnetic force resistance welders of the inertia type provided with fixed air gap
GB1502529A (en) Alternating current electro-magnet
GB1406035A (en) Electromagnetic devices

Legal Events

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