EP0981138A3 - Electromagnetic arrangements - Google Patents

Electromagnetic arrangements Download PDF

Info

Publication number
EP0981138A3
EP0981138A3 EP99305843A EP99305843A EP0981138A3 EP 0981138 A3 EP0981138 A3 EP 0981138A3 EP 99305843 A EP99305843 A EP 99305843A EP 99305843 A EP99305843 A EP 99305843A EP 0981138 A3 EP0981138 A3 EP 0981138A3
Authority
EP
European Patent Office
Prior art keywords
core
coil
output member
energisation
response
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.)
Withdrawn
Application number
EP99305843A
Other languages
German (de)
French (fr)
Other versions
EP0981138A2 (en
Inventor
Ludovic Chauvet
Philippe Drumel
Stephane Chauvet
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.)
Laird Holdings Ltd
Original Assignee
Draftex 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 Draftex Industries Ltd filed Critical Draftex Industries Ltd
Publication of EP0981138A2 publication Critical patent/EP0981138A2/en
Publication of EP0981138A3 publication Critical patent/EP0981138A3/en
Withdrawn legal-status Critical Current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
    • 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
    • H01F7/088—Electromagnets; Actuators including electromagnets with armatures provided with means for absorbing shocks

Abstract

An electromagnetic arrangement comprises an armature (12) mounted within a housing (5) and carrying an electrically energisable coil (14). A core (8) slides inwardly of a hollow space (10) against a compression spring (18) in response to electrical energisation of the coil (14), and slides in the opposite direction upon de-energisation of the coil in response to the stored energy of the spring (18). The core (8) is connected to an output member (6) by means of a control rod (24) freely slidable through the core (8) and which has an enlarged head (27) against which a second coil spring (28) acts. During inward movement of the core (8) in response to energisation of the coil (14), the core (8) pulls the output member (6) through the intermediary of a second spring (28) and a control rod (24) which is slidable through the core (8) and is fixed to the output member (6). During outward movement of the core (8) in response to de-energisation of the coil (14), an end face (15) of the core (8) pushes on an end face (26) of the output member (6). When the core (8) is at its innermost position, a predetermined amount of play (32) exists between the end (15) of the core (8) and the end face (26) of the output member (6). This allows the core (8) to accelerate before it abuts against the end face (26) of the output member (6).
EP99305843A 1998-08-15 1999-07-23 Electromagnetic arrangements Withdrawn EP0981138A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9817715A GB2340664A (en) 1998-08-15 1998-08-15 An electromagnetic device using a spring and dynamic core arrangement
GB9817715 1998-08-15

Publications (2)

Publication Number Publication Date
EP0981138A2 EP0981138A2 (en) 2000-02-23
EP0981138A3 true EP0981138A3 (en) 2000-03-15

Family

ID=10837244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99305843A Withdrawn EP0981138A3 (en) 1998-08-15 1999-07-23 Electromagnetic arrangements

Country Status (2)

Country Link
EP (1) EP0981138A3 (en)
GB (1) GB2340664A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102945725A (en) * 2012-11-18 2013-02-27 苏州蓝王机床工具科技有限公司 Electromagnet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2007838A1 (en) * 1968-05-04 1970-01-16 Danfoss As
FR2203147A1 (en) * 1972-11-11 1974-05-10 Bosch Gmbh Robert
JPS58193988A (en) * 1982-05-06 1983-11-11 Taiheiyo Kogyo Kk Solenoid valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB638005A (en) * 1947-01-29 1950-05-31 Magnavox Co Solenoids
FR1158123A (en) * 1956-10-05 1958-06-06 Bull Sa Machines Improvements in actuation devices using electromagnets
GB2116776B (en) * 1981-08-21 1985-01-30 Caterpillar Tractor Co Solenoid having spring biased lost motion link

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2007838A1 (en) * 1968-05-04 1970-01-16 Danfoss As
FR2203147A1 (en) * 1972-11-11 1974-05-10 Bosch Gmbh Robert
JPS58193988A (en) * 1982-05-06 1983-11-11 Taiheiyo Kogyo Kk Solenoid valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 037 (M - 277) 17 February 1984 (1984-02-17) *

Also Published As

Publication number Publication date
GB2340664A (en) 2000-02-23
EP0981138A2 (en) 2000-02-23
GB9817715D0 (en) 1998-10-14

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