DE182174C - - Google Patents

Info

Publication number
DE182174C
DE182174C DENDAT182174D DE182174DA DE182174C DE 182174 C DE182174 C DE 182174C DE NDAT182174 D DENDAT182174 D DE NDAT182174D DE 182174D A DE182174D A DE 182174DA DE 182174 C DE182174 C DE 182174C
Authority
DE
Germany
Prior art keywords
screws
letters
characters
device against
against unauthorized
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.)
Active
Application number
DENDAT182174D
Other languages
German (de)
Publication of DE182174C publication Critical patent/DE182174C/de
Active legal-status Critical Current

Links

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
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool

Description

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 Zeichnung in verschiedenen Ausführungsformen dargestellt und besteht darin, daß in den Kopf der Holzschrauben anstatt der üblichen Schlitze Buchstaben oder andere Zeichen mit vorzugsweise runden Linien vertieft eingearbeitet werden, um das Lösen der Schrauben nur mit einem besonderen Schlüssel o. dgl. zu ermöglichen.The innovation is shown in FIGS. 1 to 6 of the drawing Shown in various embodiments and consists in that in the head of the Use wood screws instead of the usual slots with letters or other characters preferably round lines can be incorporated to make loosening the screws with just one special key o. The like. To enable.

Claims (1)

Patent-Anspruch:Patent claim: Schutzvorrichtung gegen unbefugtes Lösen von Holzschrauben, dadurch gekennzeichnet, daß in die Schraubenköpfe anstatt der üblichen Schlitze Buchstaben oder Zeichen mit vorzugsweise runden Linien vertieft eingearbeitet werden, zum Zwecke, ein Lösen der Schrauben nur mit einem besonderen Werkzeug zu ermöglichen. Protective device against unauthorized loosening of wood screws, characterized in that in the screw heads instead of the usual slots letters or characters with preferably round Lines are worked in deeper so that the screws can only be loosened with a special tool.
DENDAT182174D Active DE182174C (en)

Publications (1)

Publication Number Publication Date
DE182174C true DE182174C (en)

Family

ID=446295

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT182174D Active DE182174C (en)

Country Status (1)

Country Link
DE (1) DE182174C (en)

Cited By (6)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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

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