KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Die Erfindung betrifft eine Schutzvorrichtung gegen unbefugtes Lösen von Holzschrauben,wie sie insbesondere zum Verschlüsse von Kisten u. dgl. gebraucht werden.The invention relates to a protection device against unauthorized loosening of wood screws,as they are used in particular to close boxes and the like.
Die Neuerung ist in den Fig. ι bis 6 der Zeichnungin verschiedenen Ausführungsformen dargestellt und besteht darin, daß in den Kopf derHolzschrauben anstatt der üblichen Schlitze Buchstaben oder andere Zeichen mit vorzugsweiserunden Linien vertieft eingearbeitet werden, um das Lösen der Schrauben nur mit einembesonderen Schlüssel o. dgl. zu ermöglichen.The innovation is shown in FIGS. 1 to 6 of the drawingShown in various embodiments and consists in that in the head of theUse wood screws instead of the usual slots with letters or other characters preferablyround lines can be incorporated to make loosening the screws with just onespecial key o. The like. To enable.
| Publication Number | Publication Date |
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| DE182174Ctrue DE182174C (en) |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT182174DActiveDE182174C (en) |
| Country | Link |
|---|---|
| DE (1) | DE182174C (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE968378C (en)* | 1943-01-19 | 1958-02-06 | Guest Keen & Nettlefolds Midla | Arrangement for the interaction between Phillips screws and the corresponding screwdriver |
| US3236275A (en)* | 1962-10-24 | 1966-02-22 | Robert D Smith | Screw driver with an h-shaped drawing bit |
| US4037514A (en)* | 1976-02-23 | 1977-07-26 | Juan Andres Lliteras | High torque fastener head |
| FR2680397A1 (en)* | 1991-08-14 | 1993-02-19 | Grivois Jean Marie | Means for connection between two components |
| DE4426663A1 (en)* | 1994-06-29 | 1996-01-04 | Peter Busse | Nut with key for attachment to wheel axle or saddle pillar |
| US6186718B1 (en)* | 1998-06-18 | 2001-02-13 | Northrop Grumman Corporation | Threaded fastener having a head with a triangle centerpost within a triangle recess |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE968378C (en)* | 1943-01-19 | 1958-02-06 | Guest Keen & Nettlefolds Midla | Arrangement for the interaction between Phillips screws and the corresponding screwdriver |
| US3236275A (en)* | 1962-10-24 | 1966-02-22 | Robert D Smith | Screw driver with an h-shaped drawing bit |
| US4037514A (en)* | 1976-02-23 | 1977-07-26 | Juan Andres Lliteras | High torque fastener head |
| US4146073A (en)* | 1976-02-23 | 1979-03-27 | Lliteras Juan A | Driver for high torque fastener |
| FR2680397A1 (en)* | 1991-08-14 | 1993-02-19 | Grivois Jean Marie | Means for connection between two components |
| DE4426663A1 (en)* | 1994-06-29 | 1996-01-04 | Peter Busse | Nut with key for attachment to wheel axle or saddle pillar |
| US6186718B1 (en)* | 1998-06-18 | 2001-02-13 | Northrop Grumman Corporation | Threaded fastener having a head with a triangle centerpost within a triangle recess |
| Publication | Publication Date | Title |
|---|---|---|
| DE182174C (en) | ||
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