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WO1983001642A1 - Clef a corps non-aimantable renfermant des pieces conductrices en matiere ferromagnetique - Google Patents

Clef a corps non-aimantable renfermant des pieces conductrices en matiere ferromagnetique Download PDF

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Publication number
WO1983001642A1
WO1983001642A1 PCT/DE1982/000213 DE8200213W WO8301642A1 WO 1983001642 A1 WO1983001642 A1 WO 1983001642A1 DE 8200213 W DE8200213 W DE 8200213W WO 8301642 A1 WO8301642 A1 WO 8301642A1
Authority
WO
WIPO (PCT)
Prior art keywords
key
magnetic
code
flux
flow guide
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.)
Ceased
Application number
PCT/DE1982/000213
Other languages
German (de)
English (en)
Inventor
Branko R Perkut
Leopold Anetseder
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1983001642A1 publication Critical patent/WO1983001642A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
    • G07C9/00722—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with magnetic components, e.g. magnets, magnetic strips, metallic inserts
    • G07C9/00738—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with magnetic components, e.g. magnets, magnetic strips, metallic inserts sensed by Hall effect devices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K2019/06215—Aspects not covered by other subgroups
    • G06K2019/06253—Aspects not covered by other subgroups for a specific application

Definitions

  • the invention relates to a key with a key body made of non-magnetizable material, in which flux guide pieces made of ferromagnetic material are embedded at predetermined locations, which form at least one information track and embody the key secret in the form of an at least two-valued code, in the associated lock a reading device is provided which contains at least one magnetic circuit with a permanent magnet and a magnet-sensitive element and the flux guide pieces close this magnetic circuit in accordance with the predetermined code in such a way that the magnetic flux passing through the magnetically sensitive element has different values corresponding to the different ones Assumes code values.
  • Such a key with associated lock is known from this side DE-AS 29 33 -J53.
  • the disadvantage here is that the so-called key secret is easily recognizable from the outside.
  • an information point to which a code value is assigned corresponds to a flow guide with a large exit cross section from the key body, while an information point to which the other code value is assigned also has a flow guide small outlet cross section is embodied. This is true even in the case of mechanically coded, for example serrated, keys Key secret can be seen without further ado and can be easily removed by producing an impression, but this is highly undesirable for reasons of counterfeit security.
  • the invention is therefore based on the object of providing a key of the type specified at the outset, the coding of which cannot be recognized from the outside and cannot be determined with simple test means, without the maximum magnetic transferable through the key body F-flow is reduced.
  • This solution has the advantage of being able to obtain a magnetically coded key with little production engineering effort, which does not reveal any differences between the individual information points from the outside, without undesired, namely the ability to be scanned in the reading device by worsening the To have to accept additional air gaps aggravating the signal-to-noise ratio.
  • considerable effort is required to reliably determine the value of the individual information points, since the current state of development has very small distances between the information points and the use of flux
  • the solution proposed here also has the advantage that the key body is initially produced with an oversize and correspondingly large tolerances and, after coding, can be brought to the necessary, more closely tolerated target size by simple milling, since the cross section the flow guide is not changed by this.
  • the flux guide pieces corresponding to different code values can consist of material of different magnetic permeability.
  • the flux guide pieces then have the same length, e.g. rectangular cross section.
  • a further embodiment is characterized in that the flux guide pieces corresponding to different code values each consist of at least two sections, which include at least one magnetic air gap between them, the length or total length of which is dimensioned according to the code value to be embodied.
  • the internal air gap (s) thus created, which are expediently filled with a plastic or another non-magnetizable material, determine the magnetic resistance of the flux guide piece in question and thus the value of the magnetic flux which the magnet-sensitive element in the reading device has enforced.
  • the maximum possible magnetic flux is expediently assigned to one of the code values to be recognized. This can take the form of this code value being embodied by a continuous flow guide.
  • each flux guide piece has the same magnetic resistance, that each flux guide piece is assigned a flux guide plate that forms a magnetic shunt, and that each flow guide piece has an extension in its central region transverse to its longitudinal axis has, whose distance to the flux guide plate is dimensioned in accordance with the code value to be embodied.
  • the different coding can then e.g.
  • the extension of the flux guide piece is dimensioned transversely to its longitudinal axis in such a way that a practically air gap-free transition to the flux guide plate forming the shunt is formed , while for the other code values the height of this extension is kept lower, thus creating a magnetic air gap (which is preferably filled with plastic) to the flow guide plate.
  • each flux guide piece is assigned a flux guide plate forming a magnetic shunt, and that each flow guide piece has an extension in its central region transverse to its longitudinal axis, which is at a predetermined distance of the flow guide plate ends, and that this distance from the embodiment of the one code value forms a magnetic air gap and is bridged by a coding bridge to embody the other code value.
  • 1 is a perspective view of the key body of the key with associated reader
  • FIG. 7 shows a cross section through the key inserted into the reader at the level of a first information point in a second embodiment
  • FIG. 8 shows a cross section through another information point of the key shown in FIG. 7,
  • a is a side view and a cross section of a third embodiment of the key
  • Fig. 12a - 14 cross sections through two different
  • the key body 1 shown in perspective in FIG. 1 is provided with a conventional mechanical coding 2 and with a magnetically readable coding which consists of flux guide pieces 3 made of ferromagnetic material which • pass through the key body made of non-magnetizable material.
  • Each flow guide forms * an information point and thus embodies a very specific code value, i.e. when using a dual code, either the code value log.O or log.l.
  • the successive flow guide pieces that is to say the entirety of the information points, form an information track, the distances between the individual information points preferably being of the same size.
  • the lock belonging to this key contains a reading device 4.
  • This includes a permanent magnet 5.
  • the electrical ⁇ connections of the converter are designated by 9.
  • the transducer includes a Hall generator or a field plate, 'and the per se known plant and from ⁇ value generating circuits for this purpose (not shown).
  • the flux guide pieces 3 connect the permanent magnet 5 with the transducer 7 one after the other.
  • the magnetic circuit thus produced is closed via a yoke 10 in order to improve the efficiency.
  • the individual code values are embodied by flux guide pieces of different magnetic resistance.
  • the flux guide pieces assigned to the different code values consist of materials of different magnetic permeability and accordingly generate different values of the magnetic flux passing through the magnetically sensitive element of the transducer 7.
  • This type of coding means that the code value assigned to the individual information points is not recognizable from the outside and cannot be easily determined even with the aid of measuring means.
  • FIG. 2 shows a section through the reading device with the key body 1 inserted up to the third information point.
  • the coding is carried out according to a dual code.
  • One code value is embodied in each case by a continuous flow guide 3a, the other code value by a flow guide 3b, which contains a magnetic air gap 1 in the interior of the key body.
  • This continuous flux guide piece thus generates a high magnetic flux in the transducer 7 *.
  • Each interrupted flux guide piece 3b generates a low magnetic flux in the transducer 7, with the high value for example meaning log.l and the low value the meaning log.O. can be.
  • FIGS. 3 to 6 A possible way of producing the key shown in FIG. 2 is illustrated in FIGS. 3 to 6. Here it is assumed that two comb-like carriers 11, 12
  • _OMPI_ consist of ferromagnetic material and have a number of comb teeth corresponding to the number of later information points. While the comb teeth of the carrier 11 are all of the same length, the comb teeth of the other carrier 12 have two different lengths, in such a way that, after the carriers 11 and 12 have been joined together with comb teeth pointing towards one another, they touch the end faces at those points at which later Continuous flow guide pieces 3 are provided, while at the locations provided for the flow guide pieces 3b, the air gap 1 remains between the end faces of the comb teeth.
  • the carriers 11 and 12 are connected to one another via fastening tabs 13, for example by gluing.
  • 3a shows a section along the line aa in FIG. 3 *, that is, a pair of comb teeth with an air gap 1.
  • FIG. 3b shows a section along the line bb in FIG. 3, that is, a pair of comb teeth without an air gap.
  • FIG. 4a shows a section along the line a-a in FIG. 4.
  • the carriers 11 and 12 are removed, e.g. milled away.
  • OMPI contains.
  • the code element 15 is inserted into a suitable recess 16 of the key 17 and glued there. If necessary, the two broad sides of the key body with inserted code element 16 can also be milled over in order to obtain completely flat surfaces.
  • the coding is not affected by this since the magnetic resistance of the flux guide pieces 3 no longer changes. It is only by means of suitable measures, for example by producing the key body and the code element 15 with a small oversize, that the thickness of the key body after the milling is: within the permissible tolerance.
  • the key can in particular if he is wearing no mechanical coding, consist of plastic and in_ iesem case the injection molding process herge ⁇ provides be, wherein the pre-code element inserted into the mold and is molded around.
  • the code element 15 described can also contain flux guide pieces 3, which include air gaps of different sizes, when encoded according to a higher-value code.
  • the carrier shown in FIG. 3 has 12 comb teeth with several lengths that are different from one another.
  • carriers can also be used whose comb prongs of equal length face each other after connecting both carriers at a predetermined distance in accordance with the air gap desired for the one code value.
  • a ladder-like coding grid is then inserted between the two carriers, which fills the air gap at the points which are intended to embody the other code value, while at the points where the air gap is to remain, the corresponding areas of the
  • the individual flow guide pieces can also consist of more than two " parts, in particular sandwiched together, the individual parts being used for the parallel production of all flow guide pieces in accordance with the number of the provided coding locations are initially connected in the form of comb-like or ladder-like structures according to FIG. 3.
  • the flow guide piece shown in FIG. 7 in its position between the flow guide piece 6 and the transducer 7 (see FIG. 1) and embedded in the key body 1 consists of an inner flow guide core 18 and two outer flow guide covers 19, where ⁇ a narrow transverse joint remains between the respective facing surfaces of the flux guide core 18 and flux guide cover 19. All flow guide pieces consist of these parts, which are connected to one another by a plastic extrusion coating 20.
  • the various code values are generated either by the fact that both transverse joints contain a coding web 21 made of a ferromagnetic material or that, according to FIG. 8, the transverse joints are also made of plastic
  • a further code value for coding according to a trivalent code can be obtained in that a coding bridge
  • a further code value for coding according to a four-value code can be obtained in an analogous manner by making the two separating joints on both sides of the river core 18 of different widths, whereby three differently sized magnetic air gaps can be generated.
  • the flow guide pieces corresponding to the individual information points can be arranged at a very small distance from one another.
  • the problem then arises in particular to keep the talk between the individual tracks as low as possible.
  • the flow guide pieces 3 of the information tracks A and B are offset from one another by half the distance of the flow guide pieces belonging to the same information track.
  • the information tracks A and B are additionally separated from one another by a dish plate 22 made of ferromagnetic material.
  • Fig. 11 shows the key body 1 with its recess 16 for receiving the code element 23 in section.
  • the code element 23 comprises a continuous flow guide 25 embedded in plastic 24, which has an extension 2 ⁇ only in its central area transverse to its longitudinal axis. This extension 26 touches a flux guide plate 27 which extends over the entire width of the key.
  • the narrow, lateral end face of the flux guide plate 27 comes to lie in the reader outside the area of the transducer 7 occupied by the magnet-sensitive element 8.
  • a discharge web (not shown) can additionally be arranged in the reader opposite this end face.
  • FIG. 11a shows the coding element 23 inserted into the key body 1.
  • the magnetic flux entering the flow guide 25 in the direction of the arrow is divided in this embodiment of the information point into the outlet cross section of the flow guide 25 and the end face cross section of the flow guide 27.
  • the magnetically sensitive element therefore only receives a reduced magnetic flux.
  • 11b shows an information point embodying another code value.
  • the flux guide piece 25 has no continuation in the transverse direction here, and is therefore magnetically separated from the flow guide plate 27 s, with the result that the magnetic flux entering the flow guide piece 25 via one end face emerges again through the other end face.
  • the space between the flow guide piece 25 and the flow guide plate 27 is filled with the plastic 24.
  • coding according to a higher-value code is also possible here by means of differently sized magnetic air gaps between the flow guide piece 25 and the flow guide plate 27, specifically by means of flow guide pieces 25 with extensions 26 of different heights.
  • FIG. 12b shows an information point at which this coding web between the extension 26 of the flow guide piece 25 and the flow guide plate 27 is missing.
  • the two coding web supports see FIG. 14
  • FIG. 13 shows the continuous flow guide plate 27- in plan view and in section. that is used both for the embodiments according to FIGS. 11 to 11b and 12a, 12b.
  • the air gap between the extension 26 and the flow guide plate 27 can also be generated by punching out the corresponding points on the flow guide plate 27 to cancel the shunt.
  • the coding grid 28 can then be dispensed with.
  • the magnetic parts produced by the stamped-out parts are magnetic. Air gaps filled with the plastic 24.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Lock And Its Accessories (AREA)

Abstract

Des pièces conductrices ferromagnétiques (3) sont disposées à des endroits déterminés du corps de clef (1) en matière non-aimantable. Les pièces forment au moins une ligne d'information qui renferme le secret de la clef sous forme au moins d'un double code. La serrure associée comprend un lecteur (4) muni d'au moins un champ d'induction magnétique avec un aimant permanent (5) et avec un élément sensible à l'aimant (7). Les pièces conductrices ferment le champ magnétique selon le code de telle sorte que le flux magnétique traversant l'élément sensible à l'aimant présente des valeurs qui diffèrent selon les valeurs différentes du code. Afin d'empêcher que l'on ne puisse reconnaître de l'extérieur le codage de la clef ou que l'on ne puisse le déterminer par des moyens de détection simples, il est prévu que les différentes valeurs de codage sont matérialisées par des pièces conductrices de résistance magnétique différente ou qu'une tôle conductrice de flux formant un circuit shunt magnétique est associée aux pièces conductrices. Les pièces conductrices sont reliées magnétiquement à l'intérieur du corps de la clef avec la tôle conductrice de flux selon la valeur du code, soit de façon directe, soit au travers d'un entrefer.
PCT/DE1982/000213 1981-11-10 1982-11-05 Clef a corps non-aimantable renfermant des pieces conductrices en matiere ferromagnetique Ceased WO1983001642A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813144616 DE3144616A1 (de) 1981-11-10 1981-11-10 Schluessel mit einem schluesselkoerper aus nicht magnetisierbarem werkstoff, in den flussleitstuecke aus ferromagnetischem material eingebettet sind
DEP3144616.7811110 1981-11-10

Publications (1)

Publication Number Publication Date
WO1983001642A1 true WO1983001642A1 (fr) 1983-05-11

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ID=6146047

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Application Number Title Priority Date Filing Date
PCT/DE1982/000213 Ceased WO1983001642A1 (fr) 1981-11-10 1982-11-05 Clef a corps non-aimantable renfermant des pieces conductrices en matiere ferromagnetique

Country Status (3)

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EP (1) EP0093134A1 (fr)
DE (1) DE3144616A1 (fr)
WO (1) WO1983001642A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000847A1 (fr) * 1983-08-10 1985-02-28 Perkut B R Installation de serrure a actionner avec une clef
WO1986000108A1 (fr) * 1984-06-15 1986-01-03 Lowe & Fletcher Limited Serrure et cle electroniques
GB2183717B (en) * 1985-11-27 1989-12-06 Yale Security Prod Ltd Keys for locks
EP0671701A1 (fr) * 1994-03-11 1995-09-13 Thomson-Csf Carte magnétique et dispositif de lecture de cette carte
AT510430B1 (de) * 2010-12-22 2012-04-15 Evva Sicherheitstechnologie Schliesszylinder mit mitteln zum erzeugen eines magnetischen flusses im schlüsselkanal des zylinderkerns und zugehöriger schlüssel
WO2024016036A3 (fr) * 2022-07-20 2024-05-16 Evva Sicherheitstechnologie Gmbh Clé pour serrure à barillet et serrure à barillet

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8018345B2 (en) * 2005-09-08 2011-09-13 Sri International RFID tags having ferromagnetic patches
WO2020087535A1 (fr) * 2018-11-02 2020-05-07 深圳市汇顶科技股份有限公司 Appareil de reconnaissance de caractère vivant et verrou de porte

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB867663A (en) * 1957-03-13 1961-05-10 Bush And Rank Cintel Ltd Improvements in or relating to electrical locks
FR2137279A1 (fr) * 1971-05-14 1972-12-29 Crouzet Sa

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB867663A (en) * 1957-03-13 1961-05-10 Bush And Rank Cintel Ltd Improvements in or relating to electrical locks
FR2137279A1 (fr) * 1971-05-14 1972-12-29 Crouzet Sa

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000847A1 (fr) * 1983-08-10 1985-02-28 Perkut B R Installation de serrure a actionner avec une clef
WO1986000108A1 (fr) * 1984-06-15 1986-01-03 Lowe & Fletcher Limited Serrure et cle electroniques
GB2183717B (en) * 1985-11-27 1989-12-06 Yale Security Prod Ltd Keys for locks
EP0671701A1 (fr) * 1994-03-11 1995-09-13 Thomson-Csf Carte magnétique et dispositif de lecture de cette carte
FR2717284A1 (fr) * 1994-03-11 1995-09-15 Thomson Csf Carte magnétique et dispositif de lecture de cette carte.
US5557090A (en) * 1994-03-11 1996-09-17 Thomson-Csf Card having a ferromagnetic track and reader therefor
AT510430B1 (de) * 2010-12-22 2012-04-15 Evva Sicherheitstechnologie Schliesszylinder mit mitteln zum erzeugen eines magnetischen flusses im schlüsselkanal des zylinderkerns und zugehöriger schlüssel
AT510430A4 (de) * 2010-12-22 2012-04-15 Evva Sicherheitstechnologie Schliesszylinder mit mitteln zum erzeugen eines magnetischen flusses im schlüsselkanal des zylinderkerns und zugehöriger schlüssel
EP2468987A3 (fr) * 2010-12-22 2014-06-18 EVVA Sicherheitstechnologie GmbH Cylindre de serrure
WO2024016036A3 (fr) * 2022-07-20 2024-05-16 Evva Sicherheitstechnologie Gmbh Clé pour serrure à barillet et serrure à barillet

Also Published As

Publication number Publication date
DE3144616A1 (de) 1983-05-19
EP0093134A1 (fr) 1983-11-09

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