EP0195102B1 - Electric contactor for monitoring a bolt screwed in a thread or a yielding material - Google Patents

Electric contactor for monitoring a bolt screwed in a thread or a yielding material Download PDF

Info

Publication number
EP0195102B1
EP0195102B1 EP85103249A EP85103249A EP0195102B1 EP 0195102 B1 EP0195102 B1 EP 0195102B1 EP 85103249 A EP85103249 A EP 85103249A EP 85103249 A EP85103249 A EP 85103249A EP 0195102 B1 EP0195102 B1 EP 0195102B1
Authority
EP
European Patent Office
Prior art keywords
screw
contact
sleeve
making device
shank
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
EP85103249A
Other languages
German (de)
French (fr)
Other versions
EP0195102A1 (en
Inventor
Winfred Klink
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
Priority to EP85103249A priority Critical patent/EP0195102B1/en
Priority to DE8585103249T priority patent/DE3571284D1/en
Priority to AT85103249T priority patent/ATE44324T1/en
Priority to US06/840,739 priority patent/US4713506A/en
Publication of EP0195102A1 publication Critical patent/EP0195102A1/en
Application granted granted Critical
Publication of EP0195102B1 publication Critical patent/EP0195102B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/149—Mechanical actuation by lifting or attempted removal of hand-portable articles with electric, magnetic, capacitive switch actuation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits

Definitions

  • the invention relates to an electrical contactor according to the preamble of claim 1.
  • Such an electrical contactor is known from German patent specification 550 611.
  • the known contactor is used in a frame rod of an electrical protective grille, which is used to secure rooms against burglary.
  • the frame rod which consists of two halves, forms an outer conductor, the two halves being fastened to one another by means of screws.
  • An inner conductor is formed by a lamella, which is supported by one of the two rod halves. Between the lamella and the rod half there are spacer sleeves made of insulating material, which are penetrated by screws which are secured against contact with the lamella by means of insulating washers and screwed into the rod half.
  • the lamella has openings at certain intervals through which screws are passed.
  • the diameter of these openings is approximately as large as the outer thread diameter of the screw inserted, so that the thread can just be pushed through the opening.
  • the point of the screw shaft that lies in the opening is provided with a circumferential groove, so that there is sufficient space between the screw shaft and the lamella to avoid a current transfer. If an attempt is made to disassemble the frame, the screws bridge the inner conductor formed by the lamella with the outer conductor formed by the frame rod, and an alarm signal is triggered.
  • This known contactor arrangement is of relatively complex construction, and it is accepted that current-carrying parts are readily accessible from the outside in order to trigger the alarm signal, so that their deactivation is easily possible.
  • the nail pin or screw shaft on the nail head or screw head is designed as a switch rod, around which a spiral spring is wound, by means of which two alarm contacts or connecting contacts connected to a circuit are kept apart. When the switch rod on the nail or screw head is pulled out, the spring is compressed, and the two alarm contacts then come into contact, which triggers the alarm signal.
  • This switching device is also relatively complicated, with the fact that when pulling out the switch rod, which is under the load of the coil spring, this load is different than with normal fastening nails or carpet screws. There. There must be a certain distance between the two alarm contacts in order to avoid that accidental triggering of the warning system by treading vibrations and the like can be determined by carefully pulling out whether it is a fastening screw or a fastening nail that is only used for Attachment serves, acts or not. In addition, no means are provided by which the switch rod and its head are not energized during the emission of the alarm signal.
  • the object of the invention is to provide an electrical contactor of the type mentioned, which can be used with the screws used for fastening and which is designed to be extremely sensitive to triggering the alarm or monitoring signal.
  • the monitoring signal is triggered even when the screw is rotated slightly by an angle of rotation, which can also be less than 90 °. This is ensured by the fact that the bridging of the two connecting contacts connected to the circuit is achieved by a rotary movement of the screw, which is fully used to adjust the bridging contact; in contrast to the known contact arrangements in which an axial displacement of the screw or the fastening pin is used.
  • the electrical contactor proposed by the invention can be used for monitoring or securing threaded screws that are screwed into a predrilled thread and also for wood screws that are screwed into dowels or other soft material. It is also possible to use the invention for screws which are fixed at the screw shaft end by a nut.
  • the circuit which is connected to the connection contacts of the contactor can be a closed circuit or a normally open circuit. In the event of In the closed circuit, the two connection contacts are short-circuited by the bridging contact, and if this connection is released when the screw is turned, the monitoring or alarm signal is triggered. If, in the case of the normally open circuit, the two connection contacts are short-circuited by the bridging contact as a result of rotation within a certain angular range of the screw, the monitoring or alarm signal is triggered.
  • the invention can be used effectively not only in the area of alarm systems, but also in the area of accident prevention and hazard indication.
  • the exemplary embodiment shown in FIG. 1 is a screw 1 which can be screwed into a preformed thread of a nut or into a sleeve embedded in a material.
  • the contactor In the installed state, the contactor is located behind a screw head 4 and is covered by this.
  • the contactor has a bridging contact 3 in the form of a leaf spring, which can be bent to match the outer circumference of a screw shaft 2.
  • the contactor has two permanently embedded connecting contacts 8, 9.
  • the separate arrangement is shown in FIG. 2.
  • the two connection contacts 8 and 9 are arranged together with the bridging contact 3 in a plastic embedding 10, which can also be another insulating embedding, in a corresponding recess on the screw shaft 2.
  • the contactor is not only isolated from the screw head 4, but also from the screw shaft 2.
  • FIG. 2 is also a sectional view of the screw shaft 2 in the sectional plane A-A '. From this it can be seen that leads 5 and 6, which connect the connecting contacts 8 and 9 to a circuit, not shown, are insulated in grooves beneath the screw thread.
  • the sleeve 7 is arranged in an enlarged recess 13 in the material in which the screw is inserted.
  • the sleeve axis is aligned with the axis of the bore into which the screw shaft 2 is inserted.
  • the sleeve 7 is made of insulating material at least on its inner surface. It can also consist entirely of insulating material, for example plastic.
  • FIG. 3 shows various cross-sectional shapes of the inner surface of the sleeve. These inner surfaces are cylindrical.
  • a front part of the sleeve 7, from which the screw is inserted is conical, whereby an easier insertion of the screw is achieved in the subsequent bore.
  • the bridging contact 3 designed as a contact spring can be correspondingly actuated when the screw is turned.
  • the inner surface of the sleeve 7 has projections which, for example, as in the illustrated embodiments, are achieved in that the cross-sectional shape of the inner surface of the sleeve 7 deviates from the circular shape.
  • the bridging contact 3 which is designed as a leaf spring, is located within a cross-sectional expansion of the inner surface of the sleeve 7, the free end of the bridging contact 3, as shown in FIG. 2, is detached from the connecting contact 9.
  • the screw 1 By turning the screw 1 by a small angle, the for example a quarter turn or a third turn or a half turn, the free end of the bridging contact 3 is pressed onto the connecting contact 9, and the two connecting contacts 8 and 9 are thereby short-circuited. This can trigger a signal.
  • the free end of the bridging contact 3 can be pressed onto the connecting contact 9 in the desired position of the screw when the bridging contact 3 designed as a leaf spring is in a cross-sectional constriction of the sleeve. If the screw is then rotated back and forth from this desired position, the leaf spring reaches a cross-sectional widening of the sleeve, as a result of which the previously closed closed circuit is opened and a signal is thereby triggered.
  • FIG. 5 is a wood screw that can be screwed into a dowel or into another relatively soft material.
  • the screw 1 following the screw head 4 has a screw shaft part with a smooth surface, with conductive and electrically insulating surface pieces alternately provided in the circumferential direction on the surface. It is also possible for only one conductive section to be present over a certain angle of rotation range and for the rest of the circumferential angle range of the screw shaft to be electrically insulating.
  • the conductive area or areas of the screw shaft act as a bridging contact 3.
  • the screw shaft 2 is surrounded by the sleeve 7.
  • the connection contacts 8, 9 of the contactor which are connected to the circuit (not shown in more detail), are located on the inner surface of the sleeve 7.
  • the sleeve itself is formed from an electrically insulating material, for example plastic. This electrically insulating material is preferably transparent.
  • the sleeve 7 is inserted into the recess 13 aligned with the borehole. From the recess 13 can be arranged obliquely a bore 14 through which the insulated leads 5 and 6 run to the circuit, not shown.
  • connection contacts 8 and 9 provided on the inner surface of the sleeve 7 are in the form of electrically conductive surface parts.
  • the one electrically conductive surface or covering forming the connecting contact 9 extends over a relatively large angular range, for example approximately 270 °.
  • the other electrically conductive surface or covering forming the connecting contact 8 extends over an angular range of less than 90 °, insulating sections 15 and 16 are present between the two electrically conductive surface parts 8 and 9.
  • segment-shaped recesses 17, 18 are provided on the cross section of the metallic screw shaft, which are molded with insulating material to form a circular cross section.
  • the conductive surface parts are formed by the remaining screw shaft outer surfaces. These then represent the possible bridging contacts 3.
  • insulating surface coatings 19, 20 are provided, which have the bridging contacts 3 in relatively shallow depressions.
  • the metallic jacket surface of the screw shank completely with an insulating coating and to make one or more surface parts conductive thereon, for example by vapor deposition of a metallization. Isolation of the metallic screw head 4 is then achieved. This can also be achieved by providing an insulating material that fills the entire cross section of the screw shaft between the screw shaft 2 and the screw head 4.
  • the screw 1 is screwed into a nut 21 with its thread.
  • the sleeve 7, which can have the same design as the sleeve shown in FIGS. 5 and 7, is arranged at the end of the screw shaft.
  • the part 23 of the projection 22 inserted into the sleeve 7 likewise has at least one conductive surface on its surface, which acts as a bridging contact 3, as will be described below.
  • the sleeve 7 is secured against rotation and can be fixed to the nut 21, for example, by means of a holding clamp 24. However, the sleeve 7 can also be fixed against rotation via the holding clamp 24 on the material through which the screw 1 is inserted.
  • the bridging contact 3 is located exclusively in the area of the area-shaped connecting contact 9, the circuit is open. If the two flat-shaped connection contacts 8 and 9 are short-circuited by the bridging contact 3 when the screw is turned, an alarm or monitoring signal is then triggered.
  • the two flat-shaped connecting contacts 8 and 9 bridged in the desired position of the screw by the bridging contact 3, whereby the closed circuit is closed.
  • the bridging contact 3 moves out of its bridging position, which opens the closed circuit and triggers the alarm or monitoring signal.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Push-Button Switches (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

An electrical contact making arrangement for monitoring the condition of a screw screwed in a screwthread or other material receiving same comprises contacts connected to a suitable alarm or warning circuit, and a bridging contact which makes or breaks a connection between the contacts to close or open the circuit when the screw is turned out of a reference set position thereof.The bridging contact is arranged on the shank of the screw, being electrically insulated at least with respect to the head of the screw, and extends peripherally over a given angle so that the circuit is opened or closed at a slight angle of rotary movement when the screw is turned out of the reference position thereof.

Description

Die Erfindung betrifft einen elektrischen Kontaktgeber nach dem Oberbegriff des Anspruchs 1.The invention relates to an electrical contactor according to the preamble of claim 1.

Ein derartiger elektrischer Kontaktgeber ist aus der deutschen Patentschrift 550 611 bekannt. Der bekannte Kontaktgeber kommt bei einem Rahmenstab eines elektrischen Schutzgitters zur Anwendung, das zur Sicherung von Räumen gegen Einbruch dient. Dabei bildet der aus zwei Hälften bestehende Rahmenstab einen Außenleiter, wobei die beiden Hälften mittels Schrauben aneinander befestigt sind. Ein Innenleiter wird von einer Lamelle gebildet, die von einer der beiden Stabhälften getragen wird. Zwischen der Lamelle und der Stabhälfte sind Distanzhülsen aus Isoliermaterial vorhanden, welche von Schrauben durchdrungen werden, die mittels Isolierscheiben gegen Kontakt mit der Lamelle gesichert und in der Stabhälfte verschraubt sind. Die Lamelle besitzt in bestimmten Abständen Öffnungen, durch welche Schrauben geführt sind. Der Durchmesser dieser Offnungen ist ungefähr so groß wie der äußere Gewindedurchmesser der hindurchgesteckten Schraube, so daß das Gewinde gerade noch durch die Offnung hindurchgeschoben werden kann. Diejenige Stelle des Schraubenschaftes, die in der Offnung liegt, ist mit einer umlaufenden Rille versehen, so daß zwischen Schraubenschaft und Lamelle ein genügender Zwischenraum entsteht, um einen Stromübergang zu vermeiden. Wenn versucht wird, den Rahmen auseinanderzunehmen, so überbrücken die Schrauben beim Lösen den von der Lamelle gebildeten Innenleiter mit dem vom Rahmenstab gebildeten Außenleiter, und es wird ein Alarmsignal ausgelöst.Such an electrical contactor is known from German patent specification 550 611. The known contactor is used in a frame rod of an electrical protective grille, which is used to secure rooms against burglary. The frame rod, which consists of two halves, forms an outer conductor, the two halves being fastened to one another by means of screws. An inner conductor is formed by a lamella, which is supported by one of the two rod halves. Between the lamella and the rod half there are spacer sleeves made of insulating material, which are penetrated by screws which are secured against contact with the lamella by means of insulating washers and screwed into the rod half. The lamella has openings at certain intervals through which screws are passed. The diameter of these openings is approximately as large as the outer thread diameter of the screw inserted, so that the thread can just be pushed through the opening. The point of the screw shaft that lies in the opening is provided with a circumferential groove, so that there is sufficient space between the screw shaft and the lamella to avoid a current transfer. If an attempt is made to disassemble the frame, the screws bridge the inner conductor formed by the lamella with the outer conductor formed by the frame rod, and an alarm signal is triggered.

Diese bekannte Kontaktgeberanordnung ist relativ aufwendig aufgebaut, und es wird in Kauf genommen, daß zur Auslösung der Alarmsignals stromführende Teile von außen ohne weiteres zugänglich sind, so daß deren Außerfunktionsetzen leicht möglich ist.This known contactor arrangement is of relatively complex construction, and it is accepted that current-carrying parts are readily accessible from the outside in order to trigger the alarm signal, so that their deactivation is easily possible.

Ferner ist aus der deutschen Patentschrift 384191- eine Schalteinrichtung zur Auslösung einer elektrischen Alarmanlage beim Diebstahl von Teppichen, Wandbespannungen und ähnlichen Auflagen bekannt, bei der die Alarmkontakte durch die zu sichernden Auflagen verdeckt sind. Als Steuerteile für die verdeckten Alarmkontakte werden Teppichnägeln oder Teppichschrauben nachgebildete Steuerteile verwendet, die sich von den zur tatsächlichen Befestigung der Auflagen verwendeten Teppichnägel bzw. Teppichschrauben von außen nicht unterscheiden. Bei der Schalteinrichtung ist der Nagelstift bzw. der Schraubenschaft am Nagelkopf bzw. Schraubenkopf ausgebildet als Schalterstange, um die eine Spiralfeder gewickelt ist, durch welche zwei mit einem Stromkreis verbundene Alarmkontakte bzw. Verbindungskontakte auseinandergehalten werden. Beim Herausziehen wird der am Nagel- bzw. Schraubkopf vorhandenen Schalterstange die Feder zusammengedrückt, und es kommen dann auch die beiden Alarmkontakte in Berührung, wodurch das Alarmsignal ausgelöst wird.Furthermore, from the German patent 384191- a switching device for triggering an electrical alarm system in the theft of carpets, wall coverings and similar conditions is known, in which the alarm contacts are covered by the conditions to be secured. Carpet nails or carpet screws simulated control parts are used as control parts for the hidden alarm contacts, which do not differ from the outside from the carpet nails or carpet screws used for the actual attachment of the supports. In the switching device, the nail pin or screw shaft on the nail head or screw head is designed as a switch rod, around which a spiral spring is wound, by means of which two alarm contacts or connecting contacts connected to a circuit are kept apart. When the switch rod on the nail or screw head is pulled out, the spring is compressed, and the two alarm contacts then come into contact, which triggers the alarm signal.

Auch diese Schalteinrichtung ist relativ kompliziert ausgebildet, wobei noch hinzukommt, daß beim Herausziehen der Schalterstange, welche unter der Belastung der Spiralfeder steht, diese Belastung eine andere ist als bei den normalen Befestigungsnägeln bzw. Teppichschrauben. Da. zwischen den beiden Alarmkontakten ein bestinmter Abstand vorhanden sein muß, um zu vermeiden, daß durch Tritterschütterungen und dgl. ein unbeabsichtigtes Auslösen der Warnanlage vermieden wird, läßt sich durch vorsichtiges Herausziehen feststellen, ob es sich um eine Befestigungsschraube oder um einen Befestigungsnagel, der nur zur Befestigung dient, handelt oder nicht. Zudem sind keine Mittel vorgesehen, durch die verhindert wird, daß die Schalterstange und deren Kopf während der Abgabe des Alarmsignals nicht stromführend sind.This switching device is also relatively complicated, with the fact that when pulling out the switch rod, which is under the load of the coil spring, this load is different than with normal fastening nails or carpet screws. There. There must be a certain distance between the two alarm contacts in order to avoid that accidental triggering of the warning system by treading vibrations and the like can be determined by carefully pulling out whether it is a fastening screw or a fastening nail that is only used for Attachment serves, acts or not. In addition, no means are provided by which the switch rod and its head are not energized during the emission of the alarm signal.

Aufgabe der Erfindung ist es, einen elektrischen Kontaktgeber der eingangs genannten Art zu schaffen, welcher bei den zur Befestigung dienenden Schrauben einsetzbar ist und welcher für das Auslösen des Alarm- bzw. Überwachungssignals äußerst empfindlich ausgebildet ist.The object of the invention is to provide an electrical contactor of the type mentioned, which can be used with the screws used for fastening and which is designed to be extremely sensitive to triggering the alarm or monitoring signal.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.

Die abhängigen Ansprüche kennzeichnen vorteilhafte Weiterbildungen der Erfindung.The dependent claims characterize advantageous developments of the invention.

Von Vorteil ist bei der Erfindung, daß bereits bei einer geringen Verdrehung der Schraube um einen Drehwinkel, der auch geringer als 90° sein kann, schon ein Auslösen des Überwachungsignals erfolgt. Dies ist dadurch gewährleistet, daß die Überbrückung der beiden mit dem Stromkreis verbundenen Verbindungskontakte durch eine Drehbewegung der Schraube erreicht wird, welche voll zur Verstellung des Überbrückungskontaktes ausgenützt wird; im Gegensatz zu den bekannten Kontaktanordnungen, bei denen eine axiale Verschiebung der Schraube bzw. des Befestigungsstiftes ausgenützt wird.It is advantageous in the invention that the monitoring signal is triggered even when the screw is rotated slightly by an angle of rotation, which can also be less than 90 °. This is ensured by the fact that the bridging of the two connecting contacts connected to the circuit is achieved by a rotary movement of the screw, which is fully used to adjust the bridging contact; in contrast to the known contact arrangements in which an axial displacement of the screw or the fastening pin is used.

Der durch die Erfindung vorgeschlagene elektrische Kontaktgeber kann zur Überwachung bzw. zur Absicherung von Gewindeschrauben, die in ein vorgebohrtes Gewinde eingeschraubt werden und auch von Holzschrauben, die in Dübel oder anderes weiches Material eingeschraubt werden, zum Einsatz kommen. Auch ist es möglich, die Erfindung bei Schrauben zum Einsatz zu bringen, die am Schraubenschaftende durch eine Mutter festgelegt sind.The electrical contactor proposed by the invention can be used for monitoring or securing threaded screws that are screwed into a predrilled thread and also for wood screws that are screwed into dowels or other soft material. It is also possible to use the invention for screws which are fixed at the screw shaft end by a nut.

Durch die isolierte Einbettung der Kontakte des Kontaktgebers bzw. dessen Überbrückungskontakt gegenüber dem Schraubenkopf wird ein Anmessen von außen verhindert. Bei dem Stromkreis, welcher an die Verbindungskontakte des Kontaktgebers angeschlossen ist, kann es sich um einen Ruhestromkreis oder-um einen normalerweise geöffneten Stromkreis handeln. Im Falle des Ruhestromkreises sind die beiden Verbindungskontakte durch den Überbrückungskontakt kurzgeschlossen, und, wenn beim Verdrehen der Schraube diese Verbindung gelöst wird, wird das Überwachungs- bzw. Alarmsignal ausgelöst. Wenn im Falle des normalerweise offenen Stromkreises die beiden Verbindungskontakte durch den Überbrückungskontakt kurzgeschlossen werden infolge einer Drehung innerhalb eines bestimmten Winkelbereichs der Schraube, wird das Überwachungs- bzw. Alarmsignal ausgelöst.Due to the insulated embedding of the contacts of the contactor or its bridging contact with respect to the screw head, an external measurement is prevented. The circuit which is connected to the connection contacts of the contactor can be a closed circuit or a normally open circuit. In the event of In the closed circuit, the two connection contacts are short-circuited by the bridging contact, and if this connection is released when the screw is turned, the monitoring or alarm signal is triggered. If, in the case of the normally open circuit, the two connection contacts are short-circuited by the bridging contact as a result of rotation within a certain angular range of the screw, the monitoring or alarm signal is triggered.

Die Erfindung kann nicht nur im Bereich der Alarmanlagen wirkungsvoll zum Einsatz gebracht werden, sondern auch im Bereich von Unfallverhütung und Gefahrenanzeige.The invention can be used effectively not only in the area of alarm systems, but also in the area of accident prevention and hazard indication.

In den Figuren sind Ausführungsbeispiele der Erfindung dargestellt. Anhand der Figuren wird die Erfindung noch näher erläutert. Es zeigt :

  • Fig. 1 ein erstes Ausführungsbeispiel in perspektivischer Darstellung mit getrennter Anordnung der Einzelbauteile ;
  • Fig. 2 schnittbildliche Darstellungen eines Schraubenschaftes entlang der Schnittebenen A-A' und B-B' ;
  • Fig. 3 verschiedene Querschnittsformen für die Innenfläche der Hülse ;
  • Fig. 4 eine weitere Querschnittsform der Innenfläche der Hülse 4 ;
  • Fig. 5 ein weiteres Ausführungsbeispiel in perspektivischer Darstellung mit getrennt voneinander dargestellten Bauteilen ;
  • Fig. 6 schnittbiidiiche Darstellungen von möglichen Ausbildungen für den Schraubenschaft;
  • Fig. 7 eine schnittbildliche Darstellung einer Ausführungsform für die Hülse ;
  • Fig. 8 ein weiteres Ausführungsbeispiel.
Exemplary embodiments of the invention are shown in the figures. The invention is explained in more detail with reference to the figures. It shows :
  • Figure 1 shows a first embodiment in perspective with separate arrangement of the individual components.
  • 2 shows sectional representations of a screw shaft along the cutting planes AA 'and BB';
  • 3 shows different cross-sectional shapes for the inner surface of the sleeve;
  • 4 shows a further cross-sectional shape of the inner surface of the sleeve 4;
  • 5 shows a further exemplary embodiment in a perspective illustration with components shown separately from one another;
  • Fig. 6 sectional pictures of possible designs for the screw shaft;
  • 7 shows a sectional illustration of an embodiment for the sleeve;
  • Fig. 8 shows another embodiment.

Bei dem in der Fig. 1 gezeigten Ausführungsbeispiel handelt es sich um eine Schraube 1, welche in ein vorgeformtes Gewinde einer Mutter oder einer in ein Material eingebetteten Hülse eingeschraubt werden kann. Im eingebauten Zustand befindet sich der Kontaktgeber hinter einem Schraubkopf 4 und wird von diesem verdeckt. Der Kontaktgeber besitzt, wie aus der schnittbildlichen Darstellung in der Fig. 2 in der Schnittebene B-B' ersichtlich ist, einen Überbrückungskontakt 3 in Form einer Blattfeder, welche in Anpassung an den Außenumfang eines Schraubenschaftes 2 gebogen sein kann. In dem Bereich, in welchem der Kontaktgeber am Schraubenschaft 2 angeordnet ist, ist dieser vorzugsweise glatt ausgebildet. Daran schließt sich dann das Gewinde des Schraubenschaftes an. Ferner besitzt der Kontaktgeber zwei fest eingebettete Verbindungskontakte 8, 9. Das eine Ende des Überbrückungskontaktes 3 ist fest mit dem einen Verbindungskontakt verbunden, und das andere Ende des Überbrückungskontaktes kann gegen die Kraft der Blattfeder auf den Verbindungskontakt 9 aufgedrückt werden oder bewegt sich aufgrund der rückstellenden Federkraft der Blattfeder von diesem weg. Die getrennte Anordnung ist in der Fig. 2 dargestellt. Die beiden Verbindunskontakte 8 und 9 sind zusammen mit dem Überbrückungskontakt 3 in einer Kunststoffeinbettung 10, die auch eine andere Isoliereinbettung sein kann, in einer entsprechenden Ausnehmung am Schraubenschaft 2 angeordnet. Hierdurch wird eine isolierte Anordnung des gesamten Kontaktgebers, der aus den beiden Verbindungskontakten 8 und 9 sowie dem Überbrückungskontakt 3 besteht, geschaffen. Bei diesem Ausführungsbeispiel ist der Kontaktgeber nicht nur gegenüber dem Schraubenkopf 4, sondern auch gegenüber dem Schraubenschaft 2 isoliert angeordnet.The exemplary embodiment shown in FIG. 1 is a screw 1 which can be screwed into a preformed thread of a nut or into a sleeve embedded in a material. In the installed state, the contactor is located behind a screw head 4 and is covered by this. As can be seen from the sectional illustration in FIG. 2 in the sectional plane B-B ', the contactor has a bridging contact 3 in the form of a leaf spring, which can be bent to match the outer circumference of a screw shaft 2. In the area in which the contactor is arranged on the screw shaft 2, it is preferably smooth. This is followed by the thread of the screw shaft. Furthermore, the contactor has two permanently embedded connecting contacts 8, 9. One end of the bridging contact 3 is firmly connected to the one connecting contact, and the other end of the bridging contact can be pressed against the force of the leaf spring on the connecting contact 9 or moves due to the restoring Spring force of the leaf spring away from it. The separate arrangement is shown in FIG. 2. The two connection contacts 8 and 9 are arranged together with the bridging contact 3 in a plastic embedding 10, which can also be another insulating embedding, in a corresponding recess on the screw shaft 2. This creates an insulated arrangement of the entire contactor, which consists of the two connecting contacts 8 and 9 and the bridging contact 3. In this embodiment, the contactor is not only isolated from the screw head 4, but also from the screw shaft 2.

Aus der Fig. 2 ist ferner eine schnittbildliche Darstellung des Schraubenschaftes 2 in der Schnittebene A-A' dargestellt. Aus dieser ist zu ersehen, daß Zuleitungen 5 und 6, welche die Verbindungskontakte 8 und 9 mit einem nicht näher dargestellten Stromkreis verbinden, unterhalb des Schraubengewindes in Nuten isolierend eingebettet sind. Durch die Kunststoffeinbettung 10 im Bereich der Schnittebene B-B' wird eine isolierende Einbettung der Verbindungskontakte 8 und 9 sowie des Überbrückungskontaktes 3 am Schraubenschaft 2 erreicht, und durch Kunststoffeinbettungen 11 und 12 wird eine isolierende Einbettung der Zuleitungen 5 und 6 im Bereich des Gewindes am Schraubenschaft 2 erreicht.From Fig. 2 is also a sectional view of the screw shaft 2 in the sectional plane A-A '. From this it can be seen that leads 5 and 6, which connect the connecting contacts 8 and 9 to a circuit, not shown, are insulated in grooves beneath the screw thread. The plastic embedding 10 in the area of the section plane BB 'achieves an insulating embedding of the connecting contacts 8 and 9 and the bridging contact 3 on the screw shaft 2, and an insulating embedding of the leads 5 and 6 in the area of the thread on the screw shaft 2 is achieved by plastic embedding 11 reached.

Der Bereich des Schraubenschaftes 2, welcher den elektrischen Kontaktgeber (Verbindungskontakte 8 und 9 und Überbrückungskontakte 3) aufweist, wird von einer Hülse 7 umgeben, wel- . cher als Lenkkörper zur Betätigung des Überbrückungskontaktes 3 beim Verdrehen der Schraube dient. Die Hülse 7 ist in einer erweiterten Ausnehmung 13 in dem Material, in welches die Schraube eingesetzt wird, angeordnet. Die Hülsenachse fluchtet mit der Achse der Bohrung, in welche der Schraubenschaft 2 eingesetzt wird. Die Hülse 7 besteht zumindest an ihrer Innenfläche aus isolierendem Material. Sie kann auch insgesamt aus Isoliermaterial, beispielsweise Kunststoff, bestehen.The area of the screw shaft 2, which has the electrical contactor (connecting contacts 8 and 9 and bridging contacts 3), is surrounded by a sleeve 7, which. cher serves as a steering body for actuating the bridging contact 3 when turning the screw. The sleeve 7 is arranged in an enlarged recess 13 in the material in which the screw is inserted. The sleeve axis is aligned with the axis of the bore into which the screw shaft 2 is inserted. The sleeve 7 is made of insulating material at least on its inner surface. It can also consist entirely of insulating material, for example plastic.

In der Fig. 3 sind verschiedene Querschnittsformen der Innenfläche der Hülse dargestellt. Diese Innenflächen sind zylindrisch ausgebildet.3 shows various cross-sectional shapes of the inner surface of the sleeve. These inner surfaces are cylindrical.

Es ist jedoch auch möglich, wie in der Fig. 4 gezeigt wird, daß ein vorderer Teil der Hülse 7, von welchem her die Schraube eingesetzt wird, konisch ausgebildet ist, wodurch ein erleichtertes Einsetzen der Schraube in die nachfolgende Bohrung erreicht wird. Ferner kann durch die konische Ausbildung der Hülseninnenfläche der als Kontaktfeder ausgebildete Überbrückungskontakt 3 beim Verdrehen der Schraube entsprechend betätigt werden. Zur Betätigung des Überbrückungskontaktes 3 besitzt die Innenfläche der Hülse 7 Vorsprünge, welche beispielsweise, wie bei den dargestellten Ausführungsformen, dadurch erreicht werden, daß die Querschnittsform der Innenfläche der Hülse 7 von der Kreisform abweicht. Befindet sich der als Blattfeder ausgebildete Überbrückungskontakt 3 innerhalb einer Querschnittserweiterung der Innenfläche der Hülse 7, so ist das freie Ende des Überbrückungskontakts 3, wie in Fig. 2 dargestellt ist, vom Verbindungskontakt 9 gelöst. Beim Verdrehen der Schraube 1 um einen geringen Winkel, der beispielsweise eine Vierteldrehung bzw. eine Dritteldrehung bzw. eine halbe Drehung ausmacht, wird das freie Ende des Überbrückungskontaktes 3 auf den Verbindungskontakt 9 aufgedrückt, und die beiden Verbindungskontakte 8 und 9 werden hierdurch kurzgeschlossen. Dadurch kann ein Signal ausgelöst werden.However, it is also possible, as shown in Fig. 4, that a front part of the sleeve 7, from which the screw is inserted, is conical, whereby an easier insertion of the screw is achieved in the subsequent bore. Furthermore, due to the conical design of the inner surface of the sleeve, the bridging contact 3 designed as a contact spring can be correspondingly actuated when the screw is turned. To actuate the bridging contact 3, the inner surface of the sleeve 7 has projections which, for example, as in the illustrated embodiments, are achieved in that the cross-sectional shape of the inner surface of the sleeve 7 deviates from the circular shape. If the bridging contact 3, which is designed as a leaf spring, is located within a cross-sectional expansion of the inner surface of the sleeve 7, the free end of the bridging contact 3, as shown in FIG. 2, is detached from the connecting contact 9. When turning the screw 1 by a small angle, the for example a quarter turn or a third turn or a half turn, the free end of the bridging contact 3 is pressed onto the connecting contact 9, and the two connecting contacts 8 and 9 are thereby short-circuited. This can trigger a signal.

Es ist jedoch auch möglich, daß in der Sollstellung der Schraube das freie Ende des Überbrückungskontaktes 3 auf den Verbindungskontakt 9 aufgedrückt ist, wenn der als Blattfeder ausgebildete Überbrückungskontakt 3 in einer Querschnittsverengung der Hülse sich befindet. Wenn dann hinwiederum die Schraube aus dieser Sollstellung verdreht wird, gelangt die Blattfeder in eine Querschnittserweiterung der Hülse, wodurch der zuvor geschlossene Ruhestromkreis geöffnet wird und dadurch ein Signal ausgelöst wird.However, it is also possible for the free end of the bridging contact 3 to be pressed onto the connecting contact 9 in the desired position of the screw when the bridging contact 3 designed as a leaf spring is in a cross-sectional constriction of the sleeve. If the screw is then rotated back and forth from this desired position, the leaf spring reaches a cross-sectional widening of the sleeve, as a result of which the previously closed closed circuit is opened and a signal is thereby triggered.

Bei der in der Fig. 5 gezeigten Ausführungsform handelt es sich um eine Holzschraube, die in einen Dübel oder in ein anderes relativ weiches Material eingeschraubt werden kann.The embodiment shown in FIG. 5 is a wood screw that can be screwed into a dowel or into another relatively soft material.

Bei dieser Ausführungsform besitzt die Schraube 1 im Anschluß an den Schraubenkopf 4 einen Schraubenschaftteil mit glatter Oberfläche, wobei an der Oberfläche abwechselnd leitfähige und elektrisch isolierende Flächenstücke in Umfangsrichtung vorgesehen sind. Es ist auch möglich, daß über einen bestimmten Drehwinkelbereich nur ein leitfähiger Abschnitt vorhanden ist und der übrige.. Umfangswinkelbereich des Schraubenschaftes elektrisch isolierend ausgebildet ist.In this embodiment, the screw 1 following the screw head 4 has a screw shaft part with a smooth surface, with conductive and electrically insulating surface pieces alternately provided in the circumferential direction on the surface. It is also possible for only one conductive section to be present over a certain angle of rotation range and for the rest of the circumferential angle range of the screw shaft to be electrically insulating.

Der bzw. die leitfähig ausgebildeten Flächentelle des Schraubenschaftes wirken als Überbrückungskontakt 3. Im axialen Bereich dieses Überbrückungskontaktes bzw. der Überbrückungskontakte 3 wird der Schraubenschaft 2 von der Hülse 7 umgeben. Bei diesem Ausführungsbeispiel befinden sich die Verbindungskontakte 8, 9 des Kontaktgebers, welche mit dem nicht näher dargestellten Stromkreis verbunden sind, an der Innenfläche der Hülse 7. Die Hülse selbst ist aus elektrisch isolierendem Material, beispielsweise Kunststoff, gebildet. Bevorzugt ist dieses elektrisch isolierende Material durchsichtig ausgebildet.The conductive area or areas of the screw shaft act as a bridging contact 3. In the axial region of this bridging contact or the bridging contacts 3, the screw shaft 2 is surrounded by the sleeve 7. In this exemplary embodiment, the connection contacts 8, 9 of the contactor, which are connected to the circuit (not shown in more detail), are located on the inner surface of the sleeve 7. The sleeve itself is formed from an electrically insulating material, for example plastic. This electrically insulating material is preferably transparent.

Die Hülse 7 wird in die mit dem Bohrloch fluchtende Ausnehmung 13 eingesetzt. Von der Ausnehmung 13 läßt sich schräg verlaufend eine Bohrung 14 anordnen, durch die die isolierten Zuleitungen 5 und 6 zum nicht näher dargestellten Stromkreis verlaufen.The sleeve 7 is inserted into the recess 13 aligned with the borehole. From the recess 13 can be arranged obliquely a bore 14 through which the insulated leads 5 and 6 run to the circuit, not shown.

Beim dargestellten Ausführungsbeispiel sind die an der Innenfläche der Hülse 7 vorgesehenen Verbindungskontakte 8 und 9 in Form von elektrisch leitfähigen Flächenteilen vorhanden. Wie insbesondere die Querschnittsform der in der Fig. 7 dargestellten Hülse zeigt, erstreckt sich die eine den Verbindungskontakt 9 bildende elektrisch leitfähige Fläche bzw. Belegung über einen relativ großen Winkelbereich beispielsweise etwa 270°. Während die andere den Verbindungskontakt 8 bildende elektrisch leitfähige Fläche bzw. Belegung sich über einen Winkelbereich von weniger als 90° erstreckt, wobei isolierende Abschnitte 15 und 16 zwischen den beiden elektrisch leitfähigen Flächenteilen 8 und 9 vorhanden sind.In the illustrated embodiment, the connection contacts 8 and 9 provided on the inner surface of the sleeve 7 are in the form of electrically conductive surface parts. As the cross-sectional shape of the sleeve shown in FIG. 7 in particular shows, the one electrically conductive surface or covering forming the connecting contact 9 extends over a relatively large angular range, for example approximately 270 °. While the other electrically conductive surface or covering forming the connecting contact 8 extends over an angular range of less than 90 °, insulating sections 15 and 16 are present between the two electrically conductive surface parts 8 and 9.

Mögliche Querschnittsformen des Schraubenschaftes im Bereich des bzw. der Überbrückungskontakte 3 sind in der Fig. 6 dargestellt. Bei der einen Ausführungsform sind am Querschnitt des metallischen Schraubenschaftes segmentförmige Ausnehmungen 17, 18 vorgesehen, die mit Isoliermaterial zur Bildung eines kreisrunden Querschnittes angeformt sind. Die leitfähigen Oberflächenteile werden von den verbleibenden Schraubenschaftmantelflächen gebildet. Diese stellen dann die möglichen Uberbrückungskontakte 3 dar. Es ist jedoch auch möglich, anstelle dessen eine mit Metallisierungsstreifen versehene Kunststoffolie auf den Schraubenschaft aufzuschrumpfen. Bei der anderen Ausführungsform sind isolierende Oberflächenbeschichtungen 19, 20 vorgesehen, welche in relativ flachen Einsenkungen die Überbrückungskontakte 3 aufweisen.Possible cross-sectional shapes of the screw shaft in the area of the bridging contact (s) 3 are shown in FIG. 6. In one embodiment, segment-shaped recesses 17, 18 are provided on the cross section of the metallic screw shaft, which are molded with insulating material to form a circular cross section. The conductive surface parts are formed by the remaining screw shaft outer surfaces. These then represent the possible bridging contacts 3. However, it is also possible instead to shrink a plastic film provided with metallization strips onto the screw shaft. In the other embodiment, insulating surface coatings 19, 20 are provided, which have the bridging contacts 3 in relatively shallow depressions.

Es ist jedoch auch möglich die metallische Manteloberfläche des Schraubenschaftes vollständig mit einem isolierenden Überzug zu versehen und auf diesen einen oder mehrere Flächenteile leitend auszubilden, beispielsweise durch Aufdampfen einer Metallisierung. Es wird dann eine Isolierung des metallischen Schraubenkopfes 4 erreicht. Diese läßt sich auch dadurch erzielen, daß zwischen dem Schraubenschaft 2 und dem Schraubenkopf 4 eine den gesamten Querschnitt des Schraubenschaftes ausfüllendes Isoliermaterial vorgesehen ist.However, it is also possible to provide the metallic jacket surface of the screw shank completely with an insulating coating and to make one or more surface parts conductive thereon, for example by vapor deposition of a metallization. Isolation of the metallic screw head 4 is then achieved. This can also be achieved by providing an insulating material that fills the entire cross section of the screw shaft between the screw shaft 2 and the screw head 4.

Bei der Ausführungsform der Fig. 8 ist die Schraube 1 mit ihrem Gewinde in eine Mutter 21 eingeschraubt. Die Hülse 7, welche die gleiche Ausbildung besitzen kann wie die in den Fig. 5 und 7 dargestellte Hülse, ist am Ende des Schraubenschaftes angeordnet. Am über die Mutter 21 hinausragenden Teil des Schraubenschaftes 2 befindet sich ein Ansatz 22, der drehfest mit dem . Schraubenschaft 2 verbunden ist. Der in die Hülse 7 eingesetzte Teil 23 des Ansatzes 22 besitzt an seiner Oberfläche ebenfalls zumindest eine leitfähige Fläche, welche als Überbrückungskontakt 3, wie noch beschrieben wird, wirkt. Die Hülse 7 ist gegen Verdrehung gesichert und kann hierzu beispielsweise mittels einer Halteklemme 24 an der Mutter 21 festgelegt sein. Die Hülse 7 kann über die Halteklemme 24 jedoch auch an dem Material, durch welches die Schraube 1 gesteckt ist, gegen Verdrehung festgelegt sein.In the embodiment of FIG. 8, the screw 1 is screwed into a nut 21 with its thread. The sleeve 7, which can have the same design as the sleeve shown in FIGS. 5 and 7, is arranged at the end of the screw shaft. On the part of the screw shank 2 protruding beyond the nut 21 there is an attachment 22 which rotates with the. Screw shaft 2 is connected. The part 23 of the projection 22 inserted into the sleeve 7 likewise has at least one conductive surface on its surface, which acts as a bridging contact 3, as will be described below. The sleeve 7 is secured against rotation and can be fixed to the nut 21, for example, by means of a holding clamp 24. However, the sleeve 7 can also be fixed against rotation via the holding clamp 24 on the material through which the screw 1 is inserted.

Wenn bei den in den Fig. 5 und 8 dargestellten Ausführungsformen der Überbrückungskontakt 3 sich ausschließlich im Bereich des flächenförmig ausgebildeten Verbindungskontaktes 9 befindet, ist der Stromkreis geöffnet. Wenn beim Verdrehen der Schraube die beiden flächenförmig ausgebildeten Verbindungskontakte 8 und 9 durch den Überbrückungskontakt 3 kurzgeschlossen werden, wird dann ein Alarm- bzw. Überwachungssignal ausgelöst.If, in the embodiments shown in FIGS. 5 and 8, the bridging contact 3 is located exclusively in the area of the area-shaped connecting contact 9, the circuit is open. If the two flat-shaped connection contacts 8 and 9 are short-circuited by the bridging contact 3 when the screw is turned, an alarm or monitoring signal is then triggered.

Für den Fall, daß der Stromkreis als Ruhestromkreis ausgebildet ist, werden die beiden flächenförmig ausgebildeten Verbindungskontakte 8 und 9 in der Sollstellung der Schraube vom Überbrückungskontakt 3 überbrückt, wodurch der Ruhestromkreis geschlossen ist. Beim Verdrehen der Schraube bewegt sich der Überbrückungskontakt 3 aus seiner Überbrückungsstellung, wodurch der Ruhestromkreis geöffnet wird und das Alarm- bzw. Überwachungssignal ausgelöst wird.In the event that the circuit is designed as a closed circuit, the two flat-shaped connecting contacts 8 and 9 bridged in the desired position of the screw by the bridging contact 3, whereby the closed circuit is closed. When the screw is turned, the bridging contact 3 moves out of its bridging position, which opens the closed circuit and triggers the alarm or monitoring signal.

Claims (13)

1. An electrical contact making device for monitoring a screw which is screwed in a screwthread or yielding material, said device, upon removal of the screw from the reference position, opening or closing a circuit connected to connecting contacts for triggering a monitoring signal by means of a bridging contact, characterised in that the bridging contact (3) is arranged on the shank (2) of the screw and extends over a given angle in the peripheral direction, and that the shank (2) of the screw is surrounded in the region of the bridging contact (3) by a sleeve (7) which with the bridging contact (3) serves to open and close the circuit. when the screw (1) is turned out of the reference position.
2. A contact making device according to claim 1 characterised in that the bridging contact (3) is in the form of a leaf spring whose one end is secured to the shank (2) of the screw and connected to the one connecting contact (8) and whose other free end is brought into contact with the other connecting contact (9) on the shank (2) of the screw by virtue of a configuration of the inside wall of the sleeve (7) which comprises insulating material at least at the inside wall when the screw (1) is turned, or is disengaged from said connecting contact (9) by virtue of the spring force of the leaf spring.
3. A contact making device according to claim 2 characterised in that the two connecting contacts (8, 9) provided on the shank (2) of the screw are connected to the circuit by way of supply lines (5, 6) which are sunk in the shank (2) of the screw with respect to the screwthread and are in- sulatedly embedded therein.
4. A contact making device according to one of claims 1 to 3 characterised in that the inside surface of the sleeve (7), which is of circular cross-section, has one or more projections.
5. A contact making device according to claim 2 characterised in that the cross-section of the inside surface of the sleeve (7) differs from the circular shape.
6. A contact making device according to claim 5 characterised in that the cross-section of the inside surface of the sleeve (7) is elliptical.
7. A contact making device according to claim 1 or claim 2 characterised in that the inside surface of the sleeve (7) is cylindrical in the axial direction or is of a conically convergent configuration in the direction of insertion of the screw (1).
8. A contact making device according to claim 1 characterised in that the two connecting contacts (8, 9) which are connected to the circuit are provided at the inside surface of the sleeve (7) and that said two connecting contacts (8, 9) can be short-circuited by a bridging contact (3) on the shank (2) of the screw.
9. A contact making device according to claim 8 characterised in that the connecting contacts (8, 9) are in the form of electrically conductive surfaces at the inside surface of the sleeve (7) and the bridging contact (3) is formed as an electrically conductive surface at the surface of the shank (2) of the screw.
10. A contact making device according to claim 8 or claim 9 characterised in that the sleeve (7) comprises insulating material at least at its peripheral surface.
11. A contact making device according to claim 1 characterised in that an attachment member (22) is non-rotatably secured to the projecting end of the shank (2) of the screw and has the bridging contact (3) on a part (23) of its peripheral surface, which is inserted into the sleeve (7), and that the sleeve (7), on the inside surface of which the two connecting contacts (8, 9) are disposed, is non-rotatably fixed with respect to the material through which the shank (2) of the screw is passed.
12. A contact making device according to claim 1 characterised in that the bridging contact (3) is electrically insulated at least with respect to the head (4) of the screw.
13. A contact making device according to claim 1 characterised in that the monitoring signal is triggered off when the screw is turned through an angle of less than 360° from the reference position.
EP85103249A 1985-03-20 1985-03-20 Electric contactor for monitoring a bolt screwed in a thread or a yielding material Expired EP0195102B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP85103249A EP0195102B1 (en) 1985-03-20 1985-03-20 Electric contactor for monitoring a bolt screwed in a thread or a yielding material
DE8585103249T DE3571284D1 (en) 1985-03-20 1985-03-20 Electric contactor for monitoring a bolt screwed in a thread or a yielding material
AT85103249T ATE44324T1 (en) 1985-03-20 1985-03-20 ELECTRICAL CONTACT TRANSMITTER FOR MONITORING A SCREW SCREWED INTO A THREAD OR A YIELD MATERIAL.
US06/840,739 US4713506A (en) 1985-03-20 1986-03-18 Electrical contact making arrangement for monitoring the condition of a screw in an installed position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85103249A EP0195102B1 (en) 1985-03-20 1985-03-20 Electric contactor for monitoring a bolt screwed in a thread or a yielding material

Publications (2)

Publication Number Publication Date
EP0195102A1 EP0195102A1 (en) 1986-09-24
EP0195102B1 true EP0195102B1 (en) 1989-06-28

Family

ID=8193385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85103249A Expired EP0195102B1 (en) 1985-03-20 1985-03-20 Electric contactor for monitoring a bolt screwed in a thread or a yielding material

Country Status (4)

Country Link
US (1) US4713506A (en)
EP (1) EP0195102B1 (en)
AT (1) ATE44324T1 (en)
DE (1) DE3571284D1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872841A (en) * 1988-06-20 1989-10-10 Hamilton Kenneth L Demonstration device for illustrating spinal misalignment
WO2002013159A1 (en) * 2000-08-03 2002-02-14 Jacob Hazan Bolt tamper sensor
EP1416174A1 (en) * 2002-10-30 2004-05-06 European Community Fixing element with controlling means for integrity
US6956479B2 (en) * 2003-02-05 2005-10-18 Vanguard Products Group, Inc. Sensors and methods for detecting attachment to a surface
US7981144B2 (en) * 2006-09-21 2011-07-19 Integrity Intellect, Inc. Implant equipped for nerve location and method of use
US8075601B2 (en) 2007-04-30 2011-12-13 Warsaw Orthopedic, Inc. Deformity correction using neural integrity monitoring
US8348983B2 (en) * 2007-11-13 2013-01-08 Warsaw Orthopedic, Inc. Surgical bone screw construction
DE102011108447B4 (en) * 2011-07-23 2016-11-24 Volkswagen Ag Method and system for detecting a change in a connection state of two connection elements for a vehicle
WO2014027905A1 (en) 2012-08-15 2014-02-20 Direct Payment Solutions Limited Improvements in, or relating to, tamper evident systems
US10300890B2 (en) 2017-10-17 2019-05-28 Ford Global Technologies, Llc Systems and methods for detecting and mitigating unauthorized vehicle license plate removal
JP6612955B1 (en) * 2018-11-14 2019-11-27 Ｎｅｃプラットフォームズ株式会社 Fitted member, detection device, detection method, and detection program
CN116029555B (en) * 2023-03-22 2023-06-13 西南科技大学 Bridge risk identification early warning system based on lightweight neural network and application method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189320603A (en) * 1893-10-31 1893-12-09 James Yate Johnson Improvements in Woven Cartridge Belts.
DE384191C (en) * 1921-05-21 1923-11-08 Hans Putzien Switching device for triggering an electrical alarm system when carpets, stair runners, wall coverings and similar requirements are stolen
DE550611C (en) * 1929-10-22 1932-05-12 Samuel Bucher Frame rod for electrical protective grille
US2579623A (en) * 1950-01-19 1951-12-25 William T Stanley Multiple replaceable unit fuse
US3644745A (en) * 1969-11-10 1972-02-22 George Bell Electrical lock for ignition systems
US3803577A (en) * 1971-04-06 1974-04-09 W Peterson Connection detection connector
US4151506A (en) * 1976-09-20 1979-04-24 Wilhelm Schoenmetz Lock and alarm apparatus
US4329681A (en) * 1980-09-18 1982-05-11 Parsons Zane W Tamper sensor system
DE3110581A1 (en) * 1981-03-18 1982-12-30 Hubert 8121 Haunshofen Hammerl Switch arrangement for an electric alarm device
GB2095913B (en) * 1981-03-28 1984-09-12 Newman Controls Ltd Improvements relating to security switches

Also Published As

Publication number Publication date
US4713506A (en) 1987-12-15
ATE44324T1 (en) 1989-07-15
DE3571284D1 (en) 1989-08-03
EP0195102A1 (en) 1986-09-24

Similar Documents

Publication Publication Date Title
EP0195102B1 (en) Electric contactor for monitoring a bolt screwed in a thread or a yielding material
EP1066640B1 (en) Surge diverter
DE2340181C2 (en) Luminaire plug for illuminated picture plug-in boards
DE4020581A1 (en) WATER- AND DUST-PROOF PUSH BUTTON
DE3926217C2 (en) Electrical contact unit
DE3316834C3 (en) Actuating mandrel for storage in a lock housing for a door lock for a control cabinet
DE3726877C2 (en) SECURITY WINDOW / DOOR
DE9211229U1 (en) Fuse switch with voltage isolation on both sides
EP1183699B1 (en) Contact assembly on a preselector
DE69311111T2 (en) DEVICE TO AVOID ROLLOVER
DE3943434C2 (en)
DE4339561C2 (en) Device for grounding and / or short-circuiting fuse bases or similar contacts in low-voltage cable distributors
DE1949789C3 (en) Anti-theft device for automobiles
DE3324189C2 (en)
DE3225840A1 (en) Signal device for a fishing rod
DE29717068U1 (en) door
EP3482407A1 (en) Closing-edge safety device with prechamber
DE19754644C2 (en) Electrical installation insert
DE3110005A1 (en) Plug socket with child protection
DE4241083C2 (en) Holding device
DE7438635U (en) Device for the electrical monitoring of the locking of a lock
EP1403893B1 (en) Cartridge fuse particularly for low-voltage high-power fuses
DE3447363C1 (en) Electrical switching device
DE29606740U1 (en) Masking tape
EP0757339B1 (en) Intrusion alarm

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19861210

17Q First examination report despatched

Effective date: 19881107

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19890628

REF Corresponds to:

Ref document number: 44324

Country of ref document: AT

Date of ref document: 19890715

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3571284

Country of ref document: DE

Date of ref document: 19890803

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930305

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930318

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930319

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930331

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930630

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940320

Ref country code: AT

Effective date: 19940320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940331

Ref country code: CH

Effective date: 19940331

Ref country code: BE

Effective date: 19940331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940531

Year of fee payment: 10

BERE Be: lapsed

Owner name: KLINK WINFRED

Effective date: 19940331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19951201