EP0003494B1 - Lock defroster - Google Patents

Lock defroster Download PDF

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Publication number
EP0003494B1
EP0003494B1 EP19780810018 EP78810018A EP0003494B1 EP 0003494 B1 EP0003494 B1 EP 0003494B1 EP 19780810018 EP19780810018 EP 19780810018 EP 78810018 A EP78810018 A EP 78810018A EP 0003494 B1 EP0003494 B1 EP 0003494B1
Authority
EP
European Patent Office
Prior art keywords
melting
contact
bar
resistance wire
housing
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
EP19780810018
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German (de)
French (fr)
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EP0003494A1 (en
Inventor
Niilo Jaronen
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.)
ALL-PLAST Oy AB
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ALL-PLAST Oy AB
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Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26156898&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0003494(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from FI773109A external-priority patent/FI61071C/en
Priority claimed from FI773509A external-priority patent/FI62747C/en
Application filed by ALL-PLAST Oy AB filed Critical ALL-PLAST Oy AB
Publication of EP0003494A1 publication Critical patent/EP0003494A1/en
Application granted granted Critical
Publication of EP0003494B1 publication Critical patent/EP0003494B1/en
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0016—Defrosting, e.g. heating devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/80—Parts, attachments, accessories and adjuncts

Definitions

  • the object of the invention is a melting unit for thawing frozen locks with a melting rod which is heated with electricity and inserted into the lock.
  • the subject of the invention is specifically intended for car locks and is intended to make it possible to open or lock them when the lock has frozen so much due to the moisture that has entered the lock that the key cannot be inserted into the lock or turned in the lock.
  • the proposed melting unit for thawing frozen locks has a housing for receiving a melting rod that can be pushed out of the housing at one end and inserted into the lock.
  • This is designed as a thin metallic hollow body in relation to the key, with a resistance wire arranged therein, which is connected on the one hand via a metal part of the melting rod and on the other hand via an insulated contact point of the melting rod to the poles of batteries provided for heating the melting rod.
  • Such a lock deicer known from CH-A-416.873, was unsatisfactory since the power consumption was far too high and the batteries were exhausted after a short use. This was due to the fact that the heat was distributed along the entire length of the melting rod and caused only moderate heating. It was recognized that great heat development can be achieved with moderate power consumption if, according to the invention, the resistance wire is arranged at the upper end of an insulated conductor provided within the fusible link and connected to the contact point and is dimensioned so short that its heating effect is approximately on the tip of the fusible link concentrated.
  • the resistance wire is expediently inserted between the ends of two thin, electrically conductive, insulated metal tubes as a connecting piece.
  • the first version of the melting unit with dry cell batteries can be seen in FIGS. 1-3.
  • the unit has a housing 1 made of plastic, which is equipped with an upper sealing cover 2 and is divided into two parts by an intermediate wall 3. In the larger part, two round dry batteries 4 are accommodated, while in the smaller part an adjusting element 6 is guided, which carries a melting rod 5.
  • the wall of the housing 1 opposite the partition 3 is provided with a longitudinal slot 7, through which a protruding part 6 'of the adjusting member 6 emerges.
  • the circuit board is provided with an incision 20 (FIG. 3) through which the rod 5 can pass.
  • the structure of the melting rod 5 is shown in more detail in FIGS. 4 and 5.
  • a tube 18 made of insulating material is arranged within a metal tube 16 and surrounds a thin metal tube 17.
  • a thin resistance wire 19 e.g. fixed by flattening or by soldering, which measures only a small part of the rod length 5.
  • the other end of the rod 5 with the protruding metal tube 17 can be adjusted with the aid of the adjusting element 6, so that the end of the metal tube 17 touches the contact point 14. In this way, a closed circuit is formed over the resistance wire 19 and over the parts 15, 14, 17, 19, 16 and 12.
  • the tube 17 is also formed from resistance material, which is heated at a certain current intensity, but the effective heating takes place with the aid of the very thin (about 0.12 mm) resistance wire 19, which is connected in series with the tube 17.
  • a heating effect is approximately concentrated on the rod tip, where this heating effect is also desirable in order to allow the rod to penetrate into the icy keyhole.
  • very little electricity is used compared to an arrangement in which the entire length of the rod is heated.
  • the use of only small batteries is made possible in a very small device which can easily be carried in the pocket.
  • the tubes 17 and 18 with resistance wire 19 are loosely inserted into the round metal sleeve 16. This metal sleeve 16 is flattened so that it is pressed against the insulation tube 18, whereby the tubes 18 and 17 are also held in the metal sleeve 16.
  • FIGS. 6 and 7 In order to prevent the resistance wire 19 from being exposed to large temperature fluctuations and to prevent contact faults at the connection points, an improved version of the melting rod is shown in FIGS. 6 and 7.
  • a resistance wire 19 is inserted as a connecting piece between two facing ends thereof such that a short piece of wire is pushed into the tube 17 and 17' and held there.
  • the metal tube 17 has a length of 53 mm and the tube 17 'has a length of 15 mm.
  • the effective length of the resistance wire 19 is 10 mm. This is to be understood as the conductive part of the wire 19 which extends between the two metal tubes 17 and 17 '.
  • an insulation pipe is again e.g. Designated from Kaflon, which can withstand a temperature of approx. 350 ° C and is pushed over the parts 17, 19 and 17 '.
  • the free end of the metal tube 17 is bent into a U-shape, as can be seen from FIG. 7.
  • the protective metal sleeve 16 is pushed over these parts (Fig. 7) and thus the melting rod 5 is formed, which is flattened so that the parts are fixed against each other.
  • the adjusting member 6 made of plastic is fastened to the end of the melting rod 5, which also serves as a handle for the adjustment.
  • This adjusting member 6 is accommodated within the housing 1 of the unit.
  • an electrically conductive connection is made by soldering or by flattening.
  • the bent end of the tube 17 or a contact member connected to it protrudes from the adjusting member 6 and forms a connection at the contact point 14 to the metal sleeve 16, which forms the other contact point.

Landscapes

  • Battery Mounting, Suspending (AREA)
  • Toys (AREA)
  • Lock And Its Accessories (AREA)
  • Resistance Heating (AREA)
  • Defrosting Systems (AREA)

Description

Der Gegenstand der Erfindung ist ein Schmelzaggregat zum Auftauen von zugefrorenen Schlössern mit einem Schmelzstab, der mit Strom geheizt und in das Schloss eingeführt wird. Der Erfindungsgegenstand ist speziell für Autoschlösser bestimmt und soll ermöglichen, sie zu öffnen oder zu schliessen, wenn durch die in das Schloss gelangte Feuchtigkeit das Schloss so zugefroren ist, dass der Schlüssel nicht in das Schloss eingeschoben oder im Schloss nicht gedreht werden kann.The object of the invention is a melting unit for thawing frozen locks with a melting rod which is heated with electricity and inserted into the lock. The subject of the invention is specifically intended for car locks and is intended to make it possible to open or lock them when the lock has frozen so much due to the moisture that has entered the lock that the key cannot be inserted into the lock or turned in the lock.

Es gibt verschiedene Methoden, um zugefrorene Schlösser zu öffnen. Die bekanntesten sind Eisschmelz- und/oder Entfernungsmittel, die in das Schloss durch das Schlüsselloch gespritzt werden. Wenn das Schloss sehr zugefroren ist, erfolgt das Auftauen mit der eingespritzten Flüssigkeit sehr langsam. Darüberhinaus fliesst die Flüssigkeit aus dem Schloss auf die Karosserie des Wagens und hinterlässt dort hässliche Spuren. Wenn das Schloss so zugefroren ist, dass die Schliessplatte vor dem Schlüsselloch nicht bewegt werden kann, so dringt die Flüssigkeit nicht in das Schloss ein und das Oeffnen gelingt nicht. Ferner sind strombetriebene Schlüssel, Heizstäbchen, mit elektrischem Widerstand heizbare Schlüssel sowie batteriebetriebene Heizplatten bekannt. Diese Konstruktionen sind z.B. in der US-A-3 033 048, in der DE-B-1 553 309 und in der DE-A-2123161 beschrieben worden. Das vorgeschlagene Schmelzaggregat zum Auftauen von zugefrorenen Schlössern weist ein Gehäuse zur Aufnahme eines mit seinem einen Ende aus dem Gehäuse herausschiebbaren und in das Schloss einführbaren Schmelzstabes auf. Dieser ist als im Verhältnis zum Schlüssel dünner metallischer Hohlkörper, mit einem darin angeordneten Widerstandsdraht ausgebildet, der einerseits über einen Metallteil des Schmelzstabes und andererseits über eine isolierte Kontaktstelle des Schmelzstabes mit den Polen von zum Aufheizen des Schmelzstabes vorgesehenen Batterien verbunden ist.There are different methods to open frozen locks. The best known are ice melting and / or removing agents that are injected into the lock through the keyhole. If the lock is very frozen, thawing with the injected liquid is very slow. In addition, the liquid flows from the lock onto the body of the car, leaving ugly marks there. If the lock is so frozen that the lock plate in front of the keyhole cannot be moved, the liquid will not penetrate the lock and the opening will not succeed. Electricity-operated keys, heating sticks, keys that can be heated with electrical resistance and battery-operated heating plates are also known. These constructions are e.g. in US-A-3 033 048, in DE-B-1 553 309 and in DE-A-2123161. The proposed melting unit for thawing frozen locks has a housing for receiving a melting rod that can be pushed out of the housing at one end and inserted into the lock. This is designed as a thin metallic hollow body in relation to the key, with a resistance wire arranged therein, which is connected on the one hand via a metal part of the melting rod and on the other hand via an insulated contact point of the melting rod to the poles of batteries provided for heating the melting rod.

Ein solcher, aus der CH-A-416.873, bekannter Schlossenteiser konnte nicht befriedigen, da der Stromverbrauch viel zu hoch war und die Batterien nach kurzem Gebrauch erschöpft waren. Dies lag daran, dass die Wärmeverteilung entlang der ganzen Länge des Schmelzstabes erfolgte und nur eine mässige Erwärmung bewirkte. Es wurde erkannt, dass grosse Wärmeentwicklung bei mässigem Stromverbrauch erreicht werden kann, wenn erfindungsgemäss der Widerstandsdraht am oberen Ende eines innerhalb des Schmelzstabes vorgesehenen und mit der Kontaktstelle verbundenen isolierten Leiters angeordnet und so kurz bemessen ist, dass sich dessen Heizwirkung annähernd auf die Spitze des Schmelzstabes konzentriert. Zweckmässiger Weise ist der Widerstandsdraht zwischen den Enden zweier dünner, elektrisch leitenden, isolierten Metallröhrchen als Verbindungsstück eingefügt.Such a lock deicer, known from CH-A-416.873, was unsatisfactory since the power consumption was far too high and the batteries were exhausted after a short use. This was due to the fact that the heat was distributed along the entire length of the melting rod and caused only moderate heating. It was recognized that great heat development can be achieved with moderate power consumption if, according to the invention, the resistance wire is arranged at the upper end of an insulated conductor provided within the fusible link and connected to the contact point and is dimensioned so short that its heating effect is approximately on the tip of the fusible link concentrated. The resistance wire is expediently inserted between the ends of two thin, electrically conductive, insulated metal tubes as a connecting piece.

In dieser Weise wird eine Konzentration der Wärmeentwicklung im Bereiche der Schmelzstabspitze erreicht.In this way, a concentration of heat development in the area of the melting rod tip is achieved.

Ausführungsbeispiele der Erfindung werden an Hand der beigefügten Zeichnungen erläutert. Es zeigen :

  • Fig. 1 Ein Aggregat gemäss der ersten Ausführung in Seitenansicht von der schmalen Seite und teilweise aufgeschnitten,
  • Fig. das Aggregat im Vertikalschnitt parallel zur breiten Seite,
  • Fig. 3 eine in das Aggregat eingebaute Schaltplatte mit Glühbirne und Kontaktscheibe als Einzelheit,
  • Fig. 4 einen Schmelzstab in Seitenansicht in stark vergrössertem Massstab,
  • Fig. 5 denselben Stab um 90° gedreht, zum Teil im Schnitt, und die
  • Fig.6 und 7 verschiedene Einzelheiten der Zusammensetzung von Schmelzstäben gemäss einer weiteren Ausführung.
Embodiments of the invention are explained with reference to the accompanying drawings. Show it :
  • 1 An assembly according to the first embodiment in a side view from the narrow side and partially cut open,
  • Fig. The unit in vertical section parallel to the wide side,
  • 3 shows a circuit board with a light bulb and a contact disk built into the unit as a detail,
  • 4 a melting rod in side view on a greatly enlarged scale,
  • Fig. 5 rotated the same rod by 90 °, partly in section, and the
  • 6 and 7 different details of the composition of fusible bars according to a further embodiment.

Die erste Ausführung des Schmelzaggregates mit Trokkenbatterien ist aus den Fig. 1-3 ersichtlich. Das Aggregat weist ein Gehäuse 1 aus Kunststoff auf, welches mit einem oberen Verschlussdeckel 2 ausgerüstet und durch eine Zwischenwand 3 in zwei Teile unterteilt ist. Im grösseren Teil finden zwei runde Trockenbatterien 4 Aufnahme, während im kleineren Teil ein Verstellorgan 6 geführt ist, welches einen Schmelzstab 5 trägt. Die der Trennwand 3 gegenüberliegende Wand des Gehäuses 1 ist mit einem Längsschlitz 7 versehen, durch welchen ein vorstehender Teil 6' des Verstellorganes 6 hervortritt. Durch die Verschiebung des Vertellorganes 6 in der durch die Zwischenwand 3 und der gegenüberliegenden Gehäusewand gebildeten Führung kann der Schmelzstab 5 durch eine entsprechende Oeffnung im Gehäusedeckel2 2 in die aus den Fig. 1 und 2 ersichtliche Betriebs- oder Arbeitsstellung gestossen werden. Im Deckel 2 befindet sich eine Schaltplatte 8 mit Oeffnung zur Aufnahme einer kleinen Glühlampe9, welche durch eine Oeffnung 10 im Deckel 2 etwas hervortritt. Der Sockel der Glühlampe 9 ist mit dem positiven Pol der linken Batterie 4 (Fig. 2) in ständigem Kontakt, während der negative Pol der rechten Batterie 4 durch Kontaktstreifen 11 und 12 mit dem Gewindeteil der Glühlampe 9 in Verbindung steht. Die Kontaktstreifen 11 und 12 drücken federnd auf einen Druckknopfschalter 13. Wenn dieser niedergedrückt wird, so berührt das Ende des Kontaktstreifens 11 den Streifen 12 so, dass der Stromkreis geschlossen wird. Die Glühbirne 9 brennt nur solange der Druckknopfschalter13 niedergedrückt wird, so dass die Batterien 4 geschont werden. Mit Hilfe dieser Lampe kann das aufzutauende Schloss in der Dunkelheit leicht aufgefunden werden. Ferner kann das Schmelzaggregat für viele Zwecke als Taschenlampe gebraucht werden. Der erwähnte Schmelzstab 5 besteht aus einem hohlen, flachgedrückten Metallrohr, welches im Vergleich mit einem Autoschlüssel klein ist, so dass er in die verschiedensten Schlüssellöcher eingeführt werden kann.The first version of the melting unit with dry cell batteries can be seen in FIGS. 1-3. The unit has a housing 1 made of plastic, which is equipped with an upper sealing cover 2 and is divided into two parts by an intermediate wall 3. In the larger part, two round dry batteries 4 are accommodated, while in the smaller part an adjusting element 6 is guided, which carries a melting rod 5. The wall of the housing 1 opposite the partition 3 is provided with a longitudinal slot 7, through which a protruding part 6 'of the adjusting member 6 emerges. By moving the adjusting member 6 in the guide formed by the intermediate wall 3 and the opposite housing wall, the fusible rod 5 can be pushed into the operating or working position shown in FIGS. 1 and 2 through a corresponding opening in the housing cover. In the cover 2 there is a circuit board 8 with an opening for receiving a small light bulb 9, which emerges somewhat through an opening 10 in the cover 2. The base of the bulb 9 is in constant contact with the positive pole of the left battery 4 (FIG. 2), while the negative pole of the right battery 4 is connected to the threaded part of the bulb 9 by contact strips 11 and 12. The contact strips 11 and 12 resiliently press a push button switch 13. When this is depressed, the end of the contact strip 11 touches the strip 12 so that the circuit is closed. The light bulb 9 burns only as long as the push button switch 13 is depressed, so that the batteries 4 are protected. With the help of this lamp, the lock to be thawed can be easily found in the dark. Furthermore, the melting unit can be used as a flashlight for many purposes. The mentioned melting rod 5 consists of a hollow, flattened metal tube, which in Comparison with a car key is small, so that it can be inserted into a wide variety of keyholes.

Im Metallrohr des Schmelzstabes 5 ist ein durch die Batterien 4 beheizter Widerstandsdraht angeordnet, wie dies später ausführlich beschrieben wird. Der Schmelzstab 5 selbst bildet mit seiner Aussenfläche eine Kontaktfläche, welche in ständigem Kontakt mit dem Kontaktstreifen 12 gleitet, wenn der Stab ausgestossen oder eingezogen wird.A resistance wire heated by the batteries 4 is arranged in the metal tube of the melting rod 5, as will be described in detail later. The melting rod 5 itself forms with its outer surface a contact surface which slides in constant contact with the contact strip 12 when the rod is ejected or drawn in.

Die Schaltplatte ist mit einem Einschnitt 20 versehen (Fig. 3), durch welchen der Stab 5 durchtreten kann.The circuit board is provided with an incision 20 (FIG. 3) through which the rod 5 can pass.

Die zweite Kontaktstelle 14 zur Stromzufuhr an den Heizwiderstand im Innern des Stabes ist an der oberen Kante des Verstellorganes 6 angebracht, in solcher Weise, dass wenn das Verstellorgan 6 nach oben in die Betriebsstellung des Stabes 5 verschoben ist, diese Kontaktstelle 14 mit dem Ende des Streifens 15 in Berührung kommt, welcher andererseits zwischen dem Sockel der Glühbirne 9 und dem positiven Pol der linken Batterie 4 (Fig. 2) eingesetzt ist.The second contact point 14 for supplying current to the heating resistor inside the rod is attached to the upper edge of the adjusting element 6, in such a way that when the adjusting element 6 is shifted upwards into the operating position of the rod 5, this contact point 14 with the end of the Strip 15 comes into contact, which on the other hand is inserted between the base of the bulb 9 and the positive pole of the left battery 4 (Fig. 2).

Der Aufbau des Schmelzstabes 5 ist in den Fig. 4 und 5 näher dargestellt. Innerhalb eines Metallrohres 16 ist ein Rohr 18 aus Isoliermaterial angeordnet, welches ein dünnes Metallrohr 17 umgibt. Am oberen Ende des Rohres 17 ist ein dünner Widerstandsdraht 19, z.B. durch Flachdrücken oder durch Löten befestigt, welcher nur einen kleinen Teil der Stablänge 5 misst. Das andere Ende des Stabes 5 mit dem hervortretenden Metallrohr 17 kann mit Hilfe des Verstellorganes 6 verstellt werden, so dass das Ende des Metallrohres 17 die Kontaktstelle 14 berührt. In dieser Weise wird ein geschlossener Stromkreis über den Widerstandsdraht 19 und über die Teile 15, 14, 17, 19, 16 und 12 gebildet. Zweckmässigerweise wird das Rohr 17 ebenfalls aus Widerstandsmaterial gebildet, welches bei einer gewissen Stromintensität erhitzt wird, wobei jedoch die effektive Beheizung mit Hilfe des sehr dünnen (etwa 0,12 mm) Widerstandsdrahtes 19 erfolgt, welcher in Serie mit dem Rohr 17 geschaltet ist. In dieser Weise wird eine annähernd auf die Stabspitze konzentrierte Heizwirkung erzielt, wo diese Heizwirkung auch erwünscht ist, um das Eindringen des Stabes in das vereiste Schlüsselloch zu ermöglichen. Andererseits wird nur sehr wenig Strom gebraucht im Vergleich mit einer Anordnung, bei welcher die ganze Länge des Stabes beheizt wird. Ferner wird der Gebrauch von nur kleinen Batterien in einem sehr kleinen Gerät ermöglicht, welches leicht in der Tasche mitgeführt werden kann. Die Rohre 17 und 18 mit Widerstandsdraht 19 sind lose in die runde Metallhülse 16 eingesetzt. Diese Metal-Ihülse 16 ist so flachgedrückt, dass sie gegen das Isolationsrohr 18 gepresst wird, wodurch die Rohre 18 und 17 ebenfalls in der Metallhülse 16 festgehalten werden.The structure of the melting rod 5 is shown in more detail in FIGS. 4 and 5. A tube 18 made of insulating material is arranged within a metal tube 16 and surrounds a thin metal tube 17. At the top of the tube 17 is a thin resistance wire 19, e.g. fixed by flattening or by soldering, which measures only a small part of the rod length 5. The other end of the rod 5 with the protruding metal tube 17 can be adjusted with the aid of the adjusting element 6, so that the end of the metal tube 17 touches the contact point 14. In this way, a closed circuit is formed over the resistance wire 19 and over the parts 15, 14, 17, 19, 16 and 12. Conveniently, the tube 17 is also formed from resistance material, which is heated at a certain current intensity, but the effective heating takes place with the aid of the very thin (about 0.12 mm) resistance wire 19, which is connected in series with the tube 17. In this way, a heating effect is approximately concentrated on the rod tip, where this heating effect is also desirable in order to allow the rod to penetrate into the icy keyhole. On the other hand, very little electricity is used compared to an arrangement in which the entire length of the rod is heated. Furthermore, the use of only small batteries is made possible in a very small device which can easily be carried in the pocket. The tubes 17 and 18 with resistance wire 19 are loosely inserted into the round metal sleeve 16. This metal sleeve 16 is flattened so that it is pressed against the insulation tube 18, whereby the tubes 18 and 17 are also held in the metal sleeve 16.

Um zu verhüten, dass der Widerstandsdraht 19 zu grossen Temperaturschwankungen ausgesetzt wird und zur Verhütung von Kontaktstörungen an den Verbindungsstellen ist in den Fig. 6 und 7 eine verbesserte Ausführung des Schmelzstäbchens gezeigt.In order to prevent the resistance wire 19 from being exposed to large temperature fluctuations and to prevent contact faults at the connection points, an improved version of the melting rod is shown in FIGS. 6 and 7.

Zwischen den beiden dünnen Metallröhrchen 17 und 17' ist zwischen zwei zugekehrten Enden derselben ein Widerstandsdraht 19 als Verbindungsstück so eingesetzt, dass ein kurzer Drahtteil in das Röhrchen 17 und 17' gestossen und dort festgehalten wird. Gemäss dem Beispiel hat das Metallrohr 17 eine Länge von 53 mm und das Rohr 17' eine solche von 15 mm. Die effektive Länge des Widerstandsdrahtes 19 beträgt 10 mm. Darunter ist der leitende Teil des Drahtes 19 zu verstehen, welcher sich zwischen den beiden Metallröhrchen 17 und 17' erstreckt. Mit 18 ist wieder ein Isolationsrohr z.B. aus Kaflon bezeichnet, welches eine Temperatur von ca. 350 °C erträgt und über die Teile 17, 19 und 17' geschoben wird. Das freie Ende des Metallrohres 17 wird U-förmig umgebogen, wie dies aus der Fig. 7 ersichtlich ist. Die schützende Metallhülse 16 wird über diese Teile geschoben (Fig. 7) und somit der schmelzstab 5 gebildet, welcher flachgedrückt wird, so dass die Teile gegenüber einander fixiert werden. Daraufhin wird am Ende des Schmelzstabes 5 das Verstellorgan 6 aus Kunststoff befestigt, welches auch als Griff für die Verstellung dient. Dieses Verstellorgan 6 findet innerhalb des Gehäuses 1 des Aggregates Aufnahme. Zwischen dem freien Endes des Rohres 17 und der Metallhülse 16 wird eine elektrisch leitende Verbindung durch Löten oder durch Flachdrücken hergestellt. Das umgebogene Ende des Rohres 17 oder ein mit diesem verbundenes Kontaktorgan ragt aus dem Verstellorgan 6 heraus und bildet bei der Kontaktstelle 14 eine Verbindung zur Metallhülse 16, welche die andere Kontaktstelle bildet.Between the two thin metal tubes 17 and 17 ', a resistance wire 19 is inserted as a connecting piece between two facing ends thereof such that a short piece of wire is pushed into the tube 17 and 17' and held there. According to the example, the metal tube 17 has a length of 53 mm and the tube 17 'has a length of 15 mm. The effective length of the resistance wire 19 is 10 mm. This is to be understood as the conductive part of the wire 19 which extends between the two metal tubes 17 and 17 '. At 18 an insulation pipe is again e.g. Designated from Kaflon, which can withstand a temperature of approx. 350 ° C and is pushed over the parts 17, 19 and 17 '. The free end of the metal tube 17 is bent into a U-shape, as can be seen from FIG. 7. The protective metal sleeve 16 is pushed over these parts (Fig. 7) and thus the melting rod 5 is formed, which is flattened so that the parts are fixed against each other. Then the adjusting member 6 made of plastic is fastened to the end of the melting rod 5, which also serves as a handle for the adjustment. This adjusting member 6 is accommodated within the housing 1 of the unit. Between the free end of the tube 17 and the metal sleeve 16, an electrically conductive connection is made by soldering or by flattening. The bent end of the tube 17 or a contact member connected to it protrudes from the adjusting member 6 and forms a connection at the contact point 14 to the metal sleeve 16, which forms the other contact point.

Claims (7)

1. A melting unit for thawing locks that have frozen up, comprising a housing (1) for the reception of a melting bar (5), whose end can be moved from the housing and can be introduced into the lock and which is designed as a metallic hollow body that is thin in relation to the key and is provided with a resistance wire (19) in its interior, which wire is connected through a metal part of the melting bar (5), on the one hand, and through an insulated point of contact (14) on the melting bar (5), on the other hand, to the poles of batteries (4) which are provided for heating up the melting bar (5), characterised in that the resistance wire (19) is arranged at the upper end of an insulated conductor (17), which is provided inside the melting bar (5) and is connected to the point of contact (14), and is so short in dimension that the heating effect thereof is concentrated approximately in the tip of the melting bar (5).
2. A melting unit as claimed in Claim 1, characterised in that the resistance wire (19) is inserted as a connection piece between the ends of two thin, electrically conductive, insulated metal tubes (17, 17').
3. A melting unit as claimed in Claim 2, characterised in that the metal tubes (17, 17') and the resistance wire (19) are enclosed in an insulating tube (18), from which the ends of the conductive parts (17, 19 and 17, 17' respectively) so as to allow an electric connection to be established.
4. A melting unit as claimed in Claims 1-3, characterised in that a metal sleeve (16) of the melting bar (5), which is secured in an adjustable part (6), is designed as a contact member which slides along a contact strip (12) and in that there is provided on the adjustable part (6) another point of contact (14) which comes into contact with a contact strip (15) only in the ejected position of the melting bar (5).
5. A melting unit as claimed in Claims 1-4, characterised in that the housing (1) is subdivided into two chambers by a partition wall (3), the batteries (4) being accommodated in one chamber and the adjustable part (6) with the melting bar (5) being accommodated in the other chamber, the intermediate wall (3) serving as a guiding aid for the displaceable adjustable part (6).
6. A melting unit as claimed in Calims 1-5, characterised in that the housing (1) is equipped with a cover (2) which comprises a circuit board (8) with contact strips (11, 12, 15) and with a socket for a bulb (9).
7. A melting unit as claimed in Claim 6, characterised in that there is arranged in the cover (2) an actuating member for switching on the bulb (9), which actuating member deforms, when it is depressed, the contact strip (11) against its own spring tension and closes the electric circuit of the bulb (9).
EP19780810018 1977-10-20 1978-10-13 Lock defroster Expired EP0003494B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI773109A FI61071C (en) 1977-10-20 1977-10-20 BATTERY DRIVE SMAELTNINGSAGGREGAT FOER NEDFRUSNA IN STOCK
FI773109 1977-11-21
FI773509A FI62747C (en) 1977-11-21 1977-11-21 SMAELTNINGSAGGREGAT FOER NEDFRUSNA IN STOCK
FI773509 1977-11-22

Publications (2)

Publication Number Publication Date
EP0003494A1 EP0003494A1 (en) 1979-08-22
EP0003494B1 true EP0003494B1 (en) 1981-01-21

Family

ID=26156898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19780810018 Expired EP0003494B1 (en) 1977-10-20 1978-10-13 Lock defroster

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US (2) US4247753A (en)
EP (1) EP0003494B1 (en)
AT (1) AT357048B (en)
CA (1) CA1128591A (en)
CH (1) CH612722A5 (en)
DE (1) DE2860361D1 (en)
DK (1) DK151346C (en)
HK (1) HK3682A (en)
NO (1) NO147686C (en)

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US5142123A (en) * 1990-04-12 1992-08-25 Chou Shu Hui Electric heat sealer energizable by internal battery set or external AC adapter
US5447572A (en) * 1992-02-06 1995-09-05 Oklahoma Gas & Electric Company Method for removing debris from barrel locks
US5573685A (en) * 1996-02-05 1996-11-12 Boncaldo; Paul J. Remote control antifreeze device for a vehicle locking unit
US6335515B1 (en) 1997-08-26 2002-01-01 Welcome Company, Ltd. Electric heat sealer with offset sealer portion
US6064038A (en) * 1998-08-12 2000-05-16 Welcome Company, Ltd. Hand-held electric sealer with detachable heat resistant cover sheet
US6770849B2 (en) * 1997-08-26 2004-08-03 Welcome Co., Ltd. Table-top electric heat sealer
US6326594B1 (en) * 1997-08-26 2001-12-04 Welcome Company, Ltd. Hand-held electric sealer with safety means
US6936790B1 (en) * 1997-08-26 2005-08-30 Shu Hui Chou Electric heat sealer with safety device
US6232579B1 (en) 1997-08-26 2001-05-15 Welcome Co., Ltd. Electric heat sealer with safety device
US6100501A (en) * 1998-03-16 2000-08-08 Von Der Heyde; Christian P. Tick removal device with heating and illumination
TW201527026A (en) * 2014-01-14 2015-07-16 Rong-Fa Cai Simple electric heating tool and heating device thereof
CN107565647B (en) * 2015-05-27 2020-01-14 Oppo广东移动通信有限公司 Portable mobile power supply
US11712793B2 (en) * 2019-06-27 2023-08-01 GOODHOUSE Enterprise Co. Ltd. Hot stapler
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Also Published As

Publication number Publication date
CH612722A5 (en) 1979-08-15
DK151346B (en) 1987-11-23
NO783502L (en) 1979-04-23
US4247753A (en) 1981-01-27
NO147686C (en) 1983-05-25
ATA743978A (en) 1979-10-15
HK3682A (en) 1982-02-12
US4303825A (en) 1981-12-01
NO147686B (en) 1983-02-14
DE2860361D1 (en) 1981-03-12
DK151346C (en) 1988-05-09
AT357048B (en) 1980-06-10
DK464078A (en) 1979-04-21
EP0003494A1 (en) 1979-08-22
CA1128591A (en) 1982-07-27

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