US3733570A - Indicator means for electromagnetic devices - Google Patents

Indicator means for electromagnetic devices Download PDF

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Publication number
US3733570A
US3733570A US00157258A US3733570DA US3733570A US 3733570 A US3733570 A US 3733570A US 00157258 A US00157258 A US 00157258A US 3733570D A US3733570D A US 3733570DA US 3733570 A US3733570 A US 3733570A
Authority
US
United States
Prior art keywords
armature
plunger
casing
push piece
solenoid
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
US00157258A
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English (en)
Inventor
B Worrall
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.)
Expert Industrial Controls Ltd
Original Assignee
Expert Industrial Controls 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 Expert Industrial Controls Ltd filed Critical Expert Industrial Controls Ltd
Application granted granted Critical
Publication of US3733570A publication Critical patent/US3733570A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8225—Position or extent of motion indicator
    • Y10T137/8275—Indicator element rigidly carried by the movable element whose position is indicated

Definitions

  • a manually operable knob For manual operation of the armature a manually operable knob is provided which effects movement of the armature through the intermediary of a spring and a push piece.
  • the push piece mounts an indicator rod which is visible through the manually operable knob and the position of the indicator rod indicates the position of the armature.
  • This invention relates to electro-magnetic devices of the kind comprising in combination a casing, a solenoid disposed within the casing, an armature mounted within the casing and movable in a direction away from an end wall of the casing by the action of the solenoid and in the opposite direction by the action of resilient means and a manually operable plunger mounted in the end wall and movable to effect movement of the armature against the action of the resilient means.
  • the object of the invention is to provide such a device in a form in which the position of the armature can be determined from the exterior of the casing.
  • the plunger in a device of the kind specified is of hollow form and there extends therethrough an indicator rod movable with the armature, the rod being visible from the exterior of the casing to indicate the position of the armature.
  • a hollow casing within which is mounted a solenoid which includes a core 11 and slidable relative to the core is an armature 12.
  • the armature is spring loaded by a spring not shown and is moved against the action of the spring loading and away from an end wall of the casing, when the solenoid is energized. As shown the solenoid is energized and the armature is in contact with the core 11.
  • the plunger is formed from transparent material and the narrower portion extends from the end wall of the casing.
  • Located within the casing 10 is a push piece 14 upon which is mounted an indicator rod 15 slidable within the narrower portion of the plunger.
  • the push piece 14 can enter into the wider portion of the plunger 13 and includes a sole plate 16 approximately equal in diameter to the wider portion of the plunger.
  • the sole plate contacts the end face of the armature 12 and it is loaded into contact therewith by a coiled compression spring 17 disposed intermediate the step between the wider and narrower portions of the plunger and the push piece 14. The strength of the spring being less than that of the spring loading of the armature.
  • the sole plate 16 and push piece 14 are moved towards the end wall of the casing against the action of the spring l7 and the indicator rod 15 assumes a particular position within the exposed portion of the plunger 13.
  • the sole plate and push piece move with the armature and the indicator rod assumes another position.
  • the different positions of the indicator rod can be clearly seen from the exterior of the casing.
  • the plunger 13 can be depressed to effect manual movement of the armature for test purposes.
  • the exposed portion of the plunger is provided with a shield to prevent accidental operation.
  • the end of the plunger may be shaped to form a lens system which when the solenoid is deenergized provides an enlarged image of the end of the indicator rod.
  • the plunger need not project from the end of the casing.
  • An electromagnetic device comprising a solenoid, a casing within which the solenoid is mounted, an end wall forming part of the casing, an armature operable by the solenoid and arranged to move when the solenoid is energized away from said end wall, a manually operable plunger mounted in the end wall and movable to effect movement of the armature away from said end wall, a bore formed in the plunger, an indicator rod located in said bore and movable with the armature, the rod being visible from the exterior of the casing to indicate the position of the armature.
  • a device including a push piece connected to the indicator rod, said push piece serving as an abutment, and a coiled compression spring, one end of said coiled compression spring bearing against said abutment and acting to load the push piece into contact with the armature.
  • a device as claimed in claim 2 in which the plunger has a stepped internal surface, the other end of said spring engaging with a step on the internal surface of the plunger.
  • a device as claimed in claim 4 in which the push piece includes a sole plate bearing on the armature.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
US00157258A 1970-07-02 1971-06-28 Indicator means for electromagnetic devices Expired - Lifetime US3733570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3208870 1970-07-02

Publications (1)

Publication Number Publication Date
US3733570A true US3733570A (en) 1973-05-15

Family

ID=10333036

Family Applications (1)

Application Number Title Priority Date Filing Date
US00157258A Expired - Lifetime US3733570A (en) 1970-07-02 1971-06-28 Indicator means for electromagnetic devices

Country Status (5)

Country Link
US (1) US3733570A (show.php)
AU (1) AU3067871A (show.php)
DE (1) DE2132528A1 (show.php)
FR (1) FR2107023A5 (show.php)
GB (1) GB1344463A (show.php)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902170A (en) * 1974-02-20 1975-08-26 Ralph D Mcelroy Fault indicator for electrical circuits
DE3021184A1 (de) * 1980-06-04 1982-02-04 E. Haller & Co, 7209 Wehingen Relais zum schalten hoher stroeme
US5190071A (en) * 1982-03-02 1993-03-02 Akos Sule Pinch valve assembly
US5931177A (en) * 1994-10-28 1999-08-03 Technolog Limited Valves

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844413A1 (de) * 1988-12-30 1990-07-05 Rexroth Mannesmann Gmbh Magnet mit mehrfachanker

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919590A (en) * 1954-03-29 1960-01-05 Donald G Griswold Pilot valve actuator construction
US3056421A (en) * 1959-12-21 1962-10-02 Carls William Solenoid valve housing and mount
US3092145A (en) * 1959-10-05 1963-06-04 Ross Operating Valve Co Solenoid operated valve
US3329159A (en) * 1963-07-05 1967-07-04 Herion Erich Pilot-operated slide valve with position indicator
DE1273067B (de) * 1964-05-29 1968-07-18 Mecalectro Elektromagnet mit Tauchanker und Einrichtung zur Handbetaetigung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919590A (en) * 1954-03-29 1960-01-05 Donald G Griswold Pilot valve actuator construction
US3092145A (en) * 1959-10-05 1963-06-04 Ross Operating Valve Co Solenoid operated valve
US3056421A (en) * 1959-12-21 1962-10-02 Carls William Solenoid valve housing and mount
US3329159A (en) * 1963-07-05 1967-07-04 Herion Erich Pilot-operated slide valve with position indicator
DE1273067B (de) * 1964-05-29 1968-07-18 Mecalectro Elektromagnet mit Tauchanker und Einrichtung zur Handbetaetigung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902170A (en) * 1974-02-20 1975-08-26 Ralph D Mcelroy Fault indicator for electrical circuits
DE3021184A1 (de) * 1980-06-04 1982-02-04 E. Haller & Co, 7209 Wehingen Relais zum schalten hoher stroeme
US5190071A (en) * 1982-03-02 1993-03-02 Akos Sule Pinch valve assembly
US5931177A (en) * 1994-10-28 1999-08-03 Technolog Limited Valves

Also Published As

Publication number Publication date
FR2107023A5 (show.php) 1972-05-05
AU3067871A (en) 1973-01-04
DE2132528A1 (de) 1972-01-27
GB1344463A (en) 1974-01-23

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