US3304525A - Polarized relay for controlling devices provided with to-and-fro moving elements - Google Patents

Polarized relay for controlling devices provided with to-and-fro moving elements Download PDF

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Publication number
US3304525A
US3304525A US448378A US44837865A US3304525A US 3304525 A US3304525 A US 3304525A US 448378 A US448378 A US 448378A US 44837865 A US44837865 A US 44837865A US 3304525 A US3304525 A US 3304525A
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US
United States
Prior art keywords
leaf spring
core
polarized relay
armature
spring
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
US448378A
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English (en)
Inventor
Zangerle Walter
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.)
OC Oerlikon Corp AG Pfaeffikon
Original Assignee
Oerlikon Buehrle Holding AG
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 Oerlikon Buehrle Holding AG filed Critical Oerlikon Buehrle Holding AG
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Publication of US3304525A publication Critical patent/US3304525A/en
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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G25/00—Other details or appurtenances of control mechanisms, e.g. supporting intermediate members elastically
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/04—Stops for limiting movement of members, e.g. adjustable stop
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/42—Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G2700/00—Control mechanisms or elements therefor applying a mechanical movement
    • G05G2700/12—Control mechanisms with one controlling member and one controlled member
    • G05G2700/14—Control mechanisms with one controlling member and one controlled member with one elastic element as essential part, e.g. elastic components as a part of an actuating mechanism

Definitions

  • Examples of such devices are looms utilizing to-and-fro moving heddles, typewriters, adding machines or recording machines with key levers, or devices for carrying out punching operations, and so forth. With such and analogous devices it is of decisive importance that the holding or restraining operation of the to-and-fro moving elements proceed quickly and in synchronism with their movement and without too large an expenditure of energy.
  • the pulses emanating from the electronic devices are so short that the inertial armature will not immediately begin to carry out its movement and, further, the existing magnet field will not be able to sufficiently break down.
  • the selection of the spring tension is confined to narrow limits, since with stronger pre-stress the expenditure of energy can become too great and the magnetization of the spring influences the force of attraction.
  • A- further very important object of this invention is to provide an improved apparatus or mechanism which en- "ice ables selective control of the movement of a displaceable element with a minimum expenditure of energy.
  • a polarized relay is employed for controlling devices in which displaceable or to-and-fro moving elements must be selectively held in one position.
  • polarized relay is constructed as a permanent magnet system and is provided with a control winding for releasing an armature of the relay constructed as a leaf or flat spring.
  • the polarized relay incorporates an electromagnet having a core and a winding which is energized so as to hold the armature against the aforesaid core.
  • the inventive apparatus is characterized by the fea-- tures that an armature constructed as an elastic leaf spring of a polarized relay having a control winding for releasing the aforesaid leaf spring is provided as holding or restraining means for the to-and-fro moving element.
  • the winding or coil is energized to hold the armature against the core.
  • the leaf spring is arranged in such a manner that in its so-called held or locked position it bears under stress against the core of the polarized relay, and upon release thereof moves into its working position due to its initial or pre-stress. This working position is selected such that the leaf spring in this position has not yet reached its relaxed or unstressed condition, and furthermore, mechanical means are provided for moving the leaf spring from the working position into the locked position.
  • the polarized relay can comprise a permanent magnet system embodying a permanent magnet, an armature in the form of a leaf spring, a core, and a holder which magnetically couples the permanent magnet with the core. Also, the polarized relay can incorporate an armature in the form of a leaf spring and a known electromagnet with excitation or field winding encircling a core.
  • a polarized relay etfectively overcomes the mentioned disadvantages in that, first of all, upon release of the armature the prestress of the leaf spring is utilized as return force. Secondly, with a polarized relay in the form of a permanent magnet system only a small control current pulse is required for releasing the armature. Moreover, if the polarized relay is formed by a permanent magnet system there is additionally attained the considerable advantage that only a current surge is required for releasing the armature, so that current requirements can be held to a minimum.
  • a magnet system incorporating a polarized relay, generally designated by reference character R and comprising a permanent magnet 2 which is secured to a holder or bracket 1.
  • a leaf or fiat spring 3 is rigidly fastened by means of screw element 3b of equivalent fastening means onto the upper end of this permanent magnet 2.
  • a control coil or winding 4 disposed about a magnet core 5 is also mounted to the holder or bracket 1.
  • the leaf spring 3 is arranged in such a manner that its free upwardly flexed end 3a is disposed above the magnet core 5.
  • Position A represents the rest position which the leaf spring 3 assumes when it is not influenced by external forces in any manner.
  • position B this leaf spring 3 bears under stress against the core of the magnet system and is restrained by such in the so-called locked or contact position.
  • position C is the working position, that is, that position which leaf spring 3 assumes after it has been released. This working position C is intermediate the previously considered positions A and B.
  • working position C is determined by the stop member 6 which Constitutes a portion of a displaceable element 7 moving to-and-fro and which is to be controlled.
  • the leaf spring 3 serves as restraining member for theto-and-fro moving elements of a machine, it fulfils its function in that, by way of example, after release from the magnet system it extends with its free end 3a into the path of movement, and specifically 'here into the region of recess 6a, of the to-and-fro moving element 7 to be controlled. As a result, element 7 is effectively restrained or held.
  • the leaf spring 3 can, of course, carry out restraint or holding of the movable element 7 indirectly via a special holding mechanism.
  • the leaf spring 3 possesses the same cross-section throughout its entire length, thus does not possess any reinforcement which serves as the actual armature. Moreover, the arrangement is carried out such that the leaf spring 3 is held against the core 5 when the magnetic fiux of the permanent magnet 2 has a complete path via the holder 1, the magnet core 5 and the leaf spring 3-such elements defining the permanent magnet system of the polarized relay R. When such spring 3 bears against the magnet core 5 then it is stressed, so that when it is released it strives to move into its non-stressed rest position A.
  • a permanent magnet system as previously considered, which, on the hand, is magnetically coupled with the core 5 and, on the other hand, with the leaf spring'3.
  • the magnet core 5 is provided with a control winding 4 which during current flow is excited in such a manner that the prevailing magnetic flux emanating from the permanent magnet 2 is eliminated or weakened to such an extent that the leaf spring 3 previously bearing against the magnetic core 5 is released.
  • a short current surgea pulse-50 that the expenditure of energy for release is extremely small.
  • the control coil or winding 4 can be held very small.
  • the work position C is determined such that the leaf spring 3 in this position has not yet reached its relaxed state or condition, in other words, has not assumed its rest position A.
  • This measure has the advantage that the fiat or leaf spring 3 immediately after release from the magnetic core 5 moves out of its locked or contact position B into the working position C. Since leaf spring 3 has not yet reached its relaxed condition it does not rebound out of its working position C. 7 Moreover, the time in which the open or work position C of the spring 3 has been reached is practically always the same and there is no drop in the speed of the opening movement. This is based upon the fact that upon release of the leaf spring 3 it carries out its movement as part of an oscillation with its own fundamental frequency and such is always of the same magnitude with constant elasticity.
  • the working position C is determined in such a manner that the air gap between it and the locked or closing position B is so large that the continuously effective forces of attraction of the permanent magnet system 1, 2, 3, 5 or the excited electromagnet 4, 5 are not capable of bringing the armature i.e. leaf spring 3 to bear against the core 5.
  • the force of attraction only tends to hold the flat spring type-armature at the core 5 against the pre-stress of the spring when the armature is applied to the core by an external, preferably mechanical force.
  • This return movement takes place mechanically and, indeed, either by the to-and-fro moving element 7 itself, or by means of a special return mechanism which is actuated or controlled by such to-and-fro moving element.
  • the first solution is simpler and with such, the flexed free end 3a of the leaf spring 3 moves into the path of displacement of the to-and-fro moving element 7.
  • the leaf spring 3 is pressed once onto the core 5 of the magnet system.
  • the relevant element 7 should freely execute its to-and-fro movement, then the leaf spring 3 remains attracted against the core 5.
  • a current surge is delivered from any suitable non-illustrated supply source to the control winding 4 of the magnet system and thus the spring 3 moves into the path of displacement of the aforesaid element 7 and holds such fixed.
  • Apparatus for controlling devices having at least one to-and-fro moving element which is selectively restrained in a predetermined position comprising a polarized relay, said polarized relay including a core and an armature constructed in the form of an elastic leaf spring, said leaf spring being mounted for movement into a locked position where it bears against the core and is in a stressed state and into a working position into which it moves upon release from said core under the action of its internal stress, said working position being selected such that said leaf spring in said working position has not yet attained its relaxed state, and mechanical means for displacing said leaf spring from said working position into said locked position.
  • said polarized relay is a permanent magnet system incorporating said core and said leaf spring, and further incorporates a permanent magnet and a holder member coupling said permanent magnet with said core.
  • Apparatus as defined in claim 2 further including a control Winding cooperating With said core for releasing said leaf spring from said core.
  • said polarized relay comprises an electromagnet including said core, said leaf spring, and a winding surrounding said core.
  • Apparatus for controlling devices having at least one displaceable element which is selectively restrained in a predetermined position comprising a polarized relay, said polarized relay including a core and an armature constructed in the form of a spring, said spring being mounted for movement into a locked position where it bears against the core and is in a stressed state and into a working position into which it moves upon release from said core under placing said spring from said working position into said locked position.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Textile Engineering (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US448378A 1964-04-24 1965-04-15 Polarized relay for controlling devices provided with to-and-fro moving elements Expired - Lifetime US3304525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH537564A CH420770A (de) 1964-04-24 1964-04-24 Sperrmagnet

Publications (1)

Publication Number Publication Date
US3304525A true US3304525A (en) 1967-02-14

Family

ID=4292499

Family Applications (1)

Application Number Title Priority Date Filing Date
US448378A Expired - Lifetime US3304525A (en) 1964-04-24 1965-04-15 Polarized relay for controlling devices provided with to-and-fro moving elements

Country Status (8)

Country Link
US (1) US3304525A (de)
AT (1) AT271340B (de)
BE (1) BE662557A (de)
CH (1) CH420770A (de)
ES (1) ES312011A1 (de)
GB (1) GB1086117A (de)
NL (1) NL6505110A (de)
SE (1) SE311038B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2809248C2 (de) * 1978-03-03 1982-05-06 Grosse Webereimaschinen Gmbh, 7910 Neu-Ulm Vorrichtung zum mustergemäßen Steuern von Einleseelementen bei Fachbilde- und Kartenschlagmaschinen
DE3324778A1 (de) * 1983-07-08 1985-01-17 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Einrichtung zum halten und freigeben eines angetriebenen teiles in diskreten winkelstellungen um die antriebsdrehachse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811602A (en) * 1952-05-29 1957-10-29 Telephone Mfg Co Ltd Electromagnetic relays
US2896132A (en) * 1955-03-07 1959-07-21 Comar Electric Company Electromagnetic relay with spring loaded armature

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811602A (en) * 1952-05-29 1957-10-29 Telephone Mfg Co Ltd Electromagnetic relays
US2896132A (en) * 1955-03-07 1959-07-21 Comar Electric Company Electromagnetic relay with spring loaded armature

Also Published As

Publication number Publication date
CH420770A (de) 1966-09-15
SE311038B (de) 1969-05-27
GB1086117A (en) 1967-10-04
AT271340B (de) 1969-05-27
ES312011A1 (es) 1965-08-16
NL6505110A (de) 1965-10-25
BE662557A (de) 1965-10-15

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