FR2484570A1 - Key-operated recessed bolt fastener - uses head socket with radial invert bore and key in form of rod with radial lug on counter bevelled end - Google Patents
Key-operated recessed bolt fastener - uses head socket with radial invert bore and key in form of rod with radial lug on counter bevelled end Download PDFInfo
- Publication number
- FR2484570A1 FR2484570A1 FR8012943A FR8012943A FR2484570A1 FR 2484570 A1 FR2484570 A1 FR 2484570A1 FR 8012943 A FR8012943 A FR 8012943A FR 8012943 A FR8012943 A FR 8012943A FR 2484570 A1 FR2484570 A1 FR 2484570A1
- Authority
- FR
- France
- Prior art keywords
- key
- radial
- screw
- bore
- lug
- 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.)
- Withdrawn
Links
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
- E05B35/008—Locks for use with special keys or a plurality of keys ; keys therefor for simple tool-like keys
Abstract
Description
Dispositif antivol
La présente invention concerne un dispositif antivol destiné à rendre solidaires deux objets ou deux parties objet qui ne doivent être séparés que par des personnes autorisées. De tels dispositifs sont généralement constitués par une vis et éventuellement un boulon lequel est situé sur l'un des objets, la vis étant sur l'autre. L'on s'efforce soit de rendre inaccessible la tête de la vis, soit de donner à la vis une forme telle que les outils ordinaires ne permettent pas de la faire tourner et l'on prévoit alors une clef spéciale pour cela. Il est cependant généralement facile, au vu de la tête de vis, de trouver l'outil nécessaire.Anti-theft device
The present invention relates to an anti-theft device intended to join two objects or two object parts which should only be separated by authorized persons. Such devices generally consist of a screw and possibly a bolt which is located on one of the objects, the screw being on the other. Efforts are made either to make the head of the screw inaccessible, or to give the screw a shape such that ordinary tools do not allow it to be turned, and a special key is then provided for this. However, it is generally easy, in view of the screw head, to find the necessary tool.
La présente invention, tout en laissant accessible la tête de la vis, nécessite, pour la faire tourner, une clef spéciale dont la forme n'est pas évidente. The present invention, while leaving the head of the screw accessible, requires, to rotate it, a special key whose shape is not obvious.
Elle a pour objet un dispositif antivol consistant en une vis et une clef, caractérisé par le fait que la tête de la vis comporte un trou circulaire borgne percé selon son axe ainsi qu'une perforation débouchant dans le trou borgne et présentant un faible diamètre, dont l'axe est perpendiculaire à l'axe de la vis, et que la clef possède une extrémité dont le diamètre extérieur est un peu inférieur au diamètre intérieur du trou borgne, cette extrémité étant munie d'un ergot perpendiculaire à son axe et apte à s'introduire dans ladite perforation et présentant un profil incurvé du côté diamétralement opposé à l'ergot. It relates to an anti-theft device consisting of a screw and a key, characterized in that the head of the screw comprises a circular blind hole drilled along its axis as well as a perforation opening into the blind hole and having a small diameter, whose axis is perpendicular to the axis of the screw, and that the key has an end whose outside diameter is slightly less than the inside diameter of the blind hole, this end being provided with a lug perpendicular to its axis and suitable to be introduced into said perforation and having a curved profile on the side diametrically opposite to the lug.
De préférence la tête de la vis est située dans un logement cylindrique d'une certaine profondeur, permettant l'introduction de la clef, mais rendant encore moins évidente la perforation. Preferably the head of the screw is located in a cylindrical housing of a certain depth, allowing the introduction of the key, but making the perforation even less obvious.
La vis peut être complétée par un boulon que l'on fixe sur l'objet ou la partie que l'on veut solidariser avec l'objet ou la partie qui porte la vis. The screw can be completed by a bolt which is fixed on the object or the part which one wishes to join with the object or the part which carries the screw.
L'invention sera mieux comprise à l'aide de la description de l'exemple de réalisation ci-après, en regard du dessin annexé dans lequel
la figure 1 représente un bottier fermé par un dispositif selon l'invention
la figure 2 représente une partie de la figure 1 vue à plus grande échelle
la figure 3 représente, vue de bout, l'extrémité d'une clef selon l'invention.The invention will be better understood using the description of the exemplary embodiment below, with reference to the appended drawing in which
FIG. 1 represents a shoemaker closed by a device according to the invention
Figure 2 shows part of Figure 1 seen on a larger scale
3 shows, seen from the end, the end of a key according to the invention.
Sur la figure 1 on a représenté un boitier 1 muni d'un couvercle 2 qui s'articule sur le boitier par une charnière 11. Le couvercle 2 est muni d'un logement cylindrique 12 dans lequel est introduite une vis 4. A ce logement 12 correspond dans le bottier 1 un autre logement 13 où est placé un boulon 5. Quand le couvercle doit être fixé sur le bottier 1, comme représenté sur la figure, la vis 4 est engagée dans le boulon 5. La tête 6 de la vis enfoncee dans le logement 12 est munie d' un trou cylindrique borgne 7 dans lequel débouche une perforation 8. L'axe 20 du trou 7 est l'axe de la vis, tandis que l'axe 21 de la perforation 8 est perpendiculaire à celui de la vis. Le diamètre de la perforation 8 est notablement plus petit que le diamètre du trou 7. In Figure 1 there is shown a housing 1 provided with a cover 2 which is articulated on the housing by a hinge 11. The cover 2 is provided with a cylindrical housing 12 in which is introduced a screw 4. In this housing 12 corresponds in the case 1 to another housing 13 where a bolt is placed 5. When the cover is to be fixed on the case 1, as shown in the figure, the screw 4 is engaged in the bolt 5. The head 6 of the screw driven into the housing 12 is provided with a blind cylindrical hole 7 into which a perforation 8 opens. The axis 20 of the hole 7 is the axis of the screw, while the axis 21 of the perforation 8 is perpendicular to that of the screw. The diameter of the perforation 8 is notably smaller than the diameter of the hole 7.
Du fait de la profondeur du logement 12 il n'est pas facile d'apercevoir de l'extérieur la perforation 8. La tête 6 de la vis se présente comme un cylindre comportant un trou borgne également cylindrique et n' offrant par conséquent pas de prise pour le dévissage. Due to the depth of the housing 12 it is not easy to perceive the perforation from the outside 8. The head 6 of the screw is in the form of a cylinder comprising a blind hole also cylindrical and therefore offering no taken for unscrewing.
On a représenté sur la figure 1, mise en place pour le dévissage une clef 3 pourvue d'une tête 14. L'autre extrémité 15 s'embatte dans le trou 7 et est pourvue d'un ergot 9 qui s'engage dans la perforation 8. La partie de l'extrémité 15 diamétralement opposée à l'ergot 9 a un profil curviligne 10. There is shown in Figure 1, put in place for unscrewing a key 3 provided with a head 14. The other end 15 engages in the hole 7 and is provided with a lug 9 which engages in the perforation 8. The part of the end 15 diametrically opposite to the lug 9 has a curvilinear profile 10.
Pour une meilleure compréhension du fonctionnement et de la forme de la clef 3 on se reportera aux figures 2 et 3 qui représentent à une plus grande échelle, l'une une partie de la figure 1, l'autre l'extrémité 15 de la clef 3 vue de bout. For a better understanding of the operation and the shape of the key 3, reference is made to FIGS. 2 and 3 which represent on a larger scale, one part of FIG. 1, the other the end 15 of the key. 3 end view.
Sur la figure 2 on retrouve avec les mêmes références que sur la figure 1, une partie du couvercle 2, la partie de la vis 4 comportant la tête 6 avec le trou 7 et la perforation 8. On a représenté en traits forts la partie de la clef 3 correspondant à l'extrémité 15, pourvue de l'ergot 9 et avec le profil curviligne 10, dans la position qu'elle occupe sur la figure 1, c' est-à-dire, en position d'action sur la tête de vis, l'ergot 9 déjà engagé dans la perforation 8. In FIG. 2 we find with the same references as in FIG. 1, part of the cover 2, the part of the screw 4 comprising the head 6 with the hole 7 and the perforation 8. The part of the key 3 corresponding to the end 15, provided with the lug 9 and with the curvilinear profile 10, in the position which it occupies in FIG. 1, that is to say, in the position of action on the screw head, the lug 9 already engaged in the perforation 8.
En traits pointillés on a représenté en 3' la même partie de la clef en train de s'engager dans le trou 7. On voit la nécessité du profil curviligne 10 en observant le mouvement de pivotement que l'on fait décrire à la clef 3 autour du point O sur le bord du trou 7 au-dessus de la perforation 8.In dotted lines, the same part of the key is shown in 3 'in the process of engaging in the hole 7. We see the need for the curvilinear profile 10 by observing the pivoting movement which we make describe with the key 3 around the point O on the edge of the hole 7 above the perforation 8.
On a représenté sur la figure le logement 12 évasé pour permettre l'introduction de la clef 3 dans la tête de vis. Ceci n'est nécessaire qu'à partir d'une certaine profondeur du logement 12. Le choix de la courbe du profil 10 et des rapports entre les diamètres et les profondeurs du logement 12 et du trou 7 n' est évidemment pas arbitraire et l'on se rend compte que ces différents paramètres sont liés fonctionnellement. La figure 2 donne une des solutions possibles. There is shown in the housing 12 flared to allow the introduction of the key 3 in the screw head. This is only necessary from a certain depth of the housing 12. The choice of the curve of the profile 10 and of the relationships between the diameters and the depths of the housing 12 and of the hole 7 is obviously not arbitrary and the 'We realize that these different parameters are functionally linked. Figure 2 gives one of the possible solutions.
Il faut également préciser que la description qui précède ne concerne qu'une réalisation possible de l'invention. Le boulon 5 peut n'être pas néeessaire-.si une partie filetée est prévue dans le boitier 1 pour recevoir la vis 3, qui peut même être auto-taraudante. It should also be noted that the foregoing description relates only to one possible embodiment of the invention. The bolt 5 may not be necessary - if a threaded part is provided in the housing 1 to receive the screw 3, which can even be self-tapping.
La perforation 8 est représentée comme traversant la paroi de la tête de vis 6. Mais elle peut être constituée par un trou borgne. The perforation 8 is shown as passing through the wall of the screw head 6. But it can be constituted by a blind hole.
D'autres modifications peuvent être apportées sans pour autant sortir du domaine de l'invention. Other modifications can be made without departing from the scope of the invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8012943A FR2484570A1 (en) | 1980-06-11 | 1980-06-11 | Key-operated recessed bolt fastener - uses head socket with radial invert bore and key in form of rod with radial lug on counter bevelled end |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8012943A FR2484570A1 (en) | 1980-06-11 | 1980-06-11 | Key-operated recessed bolt fastener - uses head socket with radial invert bore and key in form of rod with radial lug on counter bevelled end |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2484570A1 true FR2484570A1 (en) | 1981-12-18 |
Family
ID=9242953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8012943A Withdrawn FR2484570A1 (en) | 1980-06-11 | 1980-06-11 | Key-operated recessed bolt fastener - uses head socket with radial invert bore and key in form of rod with radial lug on counter bevelled end |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2484570A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2572064A1 (en) * | 1984-10-23 | 1986-04-25 | Dubois Fils Expl Ets Edmond | Fastening (braking) shoe for a drum (reel) |
FR2617456A1 (en) * | 1987-07-03 | 1989-01-06 | Suarez Aulan Henri De | System for fixing accessories onto the floor of an inflatable structure such as a rubber dinghy (boat) |
FR2643690A1 (en) * | 1989-02-27 | 1990-08-31 | Vattier Claude | Screw-type fixing device, and support assemblies for a television set including this device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE881129C (en) * | 1951-07-07 | 1953-06-29 | Norbert A Kreuz | Securing against unauthorized loosening of locking means, in particular screws, nuts or the like. |
FR1050046A (en) * | 1954-01-05 | |||
GB976238A (en) * | 1962-11-16 | 1964-11-25 | Advance Linen Services Ltd | An improved rotatable lock |
FR2054276A5 (en) * | 1969-07-10 | 1971-04-16 | Hart Henry | |
DE2034802A1 (en) * | 1970-07-14 | 1972-01-27 | Husslein P | Head screw secured against unauthorized unscrewing |
FR2112597A5 (en) * | 1970-11-02 | 1972-06-23 | Meru Cie Fonderies | |
DE2301920A1 (en) * | 1973-01-16 | 1974-07-18 | Daimler Benz Ag | THEFT PROOF SCREW FASTENING OF MOTOR VEHICLE BIKES |
-
1980
- 1980-06-11 FR FR8012943A patent/FR2484570A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1050046A (en) * | 1954-01-05 | |||
DE881129C (en) * | 1951-07-07 | 1953-06-29 | Norbert A Kreuz | Securing against unauthorized loosening of locking means, in particular screws, nuts or the like. |
GB976238A (en) * | 1962-11-16 | 1964-11-25 | Advance Linen Services Ltd | An improved rotatable lock |
FR2054276A5 (en) * | 1969-07-10 | 1971-04-16 | Hart Henry | |
DE2034802A1 (en) * | 1970-07-14 | 1972-01-27 | Husslein P | Head screw secured against unauthorized unscrewing |
FR2112597A5 (en) * | 1970-11-02 | 1972-06-23 | Meru Cie Fonderies | |
DE2301920A1 (en) * | 1973-01-16 | 1974-07-18 | Daimler Benz Ag | THEFT PROOF SCREW FASTENING OF MOTOR VEHICLE BIKES |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2572064A1 (en) * | 1984-10-23 | 1986-04-25 | Dubois Fils Expl Ets Edmond | Fastening (braking) shoe for a drum (reel) |
FR2617456A1 (en) * | 1987-07-03 | 1989-01-06 | Suarez Aulan Henri De | System for fixing accessories onto the floor of an inflatable structure such as a rubber dinghy (boat) |
FR2643690A1 (en) * | 1989-02-27 | 1990-08-31 | Vattier Claude | Screw-type fixing device, and support assemblies for a television set including this device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |