NL1007787C2 - Cylinder lock with extra concentric core - Google Patents

Abstract

An attempt to force a cylinder lock by force involves the fracture of lever pins which are normally displaced by the key. The present lock has a conventional central core with a keyhole and also an extra concentric cylindrical core. The extra core carries the same number of lever pins as the central core. This provides double the number of fracture surfaces to be overcome to achieve a successful forced entry.

Description

STIPLE CYLINDERS CLOSURE WITH MULTIPLE CORE.

Description.

1 The invention is intended for all types of stud cylinder locks in which the key slides longitudinally over the studs and in its correct position in the top, bottom and eventual side studs creates a break line that coincides with the break line between the core and the cylinder housing.

One or more additional cores are placed around the usual core, for example in the form of tubes. The keyhole is located in the inner core, the outer core (s) has the same holes for the pins as the inner core. The pins protrude through the outer core (s) into the inner core, where they are normally moved into position 10 by the key. The operation of one outer core is described below. The principle is repeated for each additional outer core.

A cylinder provided with this invention therefore has two fracture lines.

One between the inner core and the outer core and one between the outer core and the cylinder housing. To operate the lock with the key it is therefore necessary that both fracture lines are also present in the pins at the same time. To make this possible, separate intermediate pins are placed in the outer and inner core, which, when the correct key is used, together with the key pins and the lower pins in the housing, form the two fracture lines simultaneously.

20 The outer core operates the driver that operates the lock mechanism.

The inner core has a carrier that only takes the outer core after rotation. After that rotation, the intermediate pins in the outer core are no longer accessible and can therefore no longer be manipulated. Therefore, if a breakline between the inner core and outer core 25 is correctly found during manipulation of the cylinder, but that between the outer core and the housing, the inner core can rotate normally, but the outer core is still blocked. Since only the outer core serves the cam for the lock mechanism, the lock cannot be opened. In this way an extra difficulty is created for the manipulator: all the pins in the cylinder behave as if they are each two pins, one of which is the right one and the other one is wrong, but which in the first instance both are the same 1007787 * 2 give result: the inner core can rotate.

After turning the inner core, however, a wrong choice can no longer be repaired, while retaining the found pins, because the pins in the outer core and in the housing are no longer accessible.

Measuring or holding the found pins does not make much sense, because it is not detectable by which pins the outer core is still blocked.

With the help of additional intermediate pins between the inner and outer core, multiple false fault lines can be created between the two cores, further increasing the manipulation difficulty.

15 A cylinder with this improvement resembles a cylinder with only one core both optically, in terms of dimensions and in terms of manufacturing technique. The assembly fits smoothly into all types of housings using pin locks, including the normalized profile cylinder, and can use all types of top, bottom, and intermediate pins 20, while greatly increasing the level of protection.

With the help of additional intermediate pins also between the outer core and the housing, the use of master key devices and center closures with this extension remains possible.

It is also possible in a simple manner to protect the cylinder against piercing the pins on the fracture surface. To this end, the outer core is provided with a non-pierceable ring at the front that protects both fracture surfaces at the same time in that position. This gives even better protection on site than the usual anti-drilling pins.

The mounting of such a ring can be particularly simple because it can be held in place by the flange of the inner core.

The functional sketch shows the operation of a cylinder with one extra core. Standard: The outer core has one intermediate pin with the thickness of the core, so that the whole has two fracture surfaces. One fake and one working. 35 Extra break surfaces: The outer core has three intermediate pins, creating an extra, false break surface between the inner and outer core. Several intermediate pins of course offer even more possibilities here. Master key and central (closures): Intermediate pins can be placed in such a way that the cylinder can be opened with different keys.

- 1007787 * «

Claims (9)

2. The pins protrude through these additional 5 cores (outer cores) via the usual bores. 3. Intermediate pins make it possible to create a fracture between the inner core, the outer core (s) and the cylinder housing at the same time, so that all cores can rotate at the same time. 10 4) However, the intermediate pins also offer the possibility of a break line only between the inner core and one of the outer cores, or between two of the outer cores, so that the outer outer core remains blocked when the key is turned. 5. The lock mechanism is only operated by the (outer) outer core 15 and not by the inner core (or one of the other outer cores). 6. The inner core serves the outer cores, and if necessary. the outer cores mutually, only after rotation. 7. The pins in the outer core (and in the cylinder housing) are closed off from the inner core of the outside world after 20 turns. making further manipulation impossible. 8. In both the right and wrong positions, the pins give the manipulator the same result: the inner core can rotate. 9. Measuring or holding the found pins does not make sense, because it is not detectable by which pins the outer core is still blocked. 10. With the help of additional intermediate pins, it is possible to create several false fault lines between the inner and first outer core, and between the outer cores themselves, which further increases the level of protection. 11. The protection of the cylinder can further be increased in a simple manner by providing the outer core (s) with an anti-drill ring. The pins are then simultaneously protected against puncture on all fracture surfaces. 1007787¾ 5 12) With the help of additional intermediate pins also between the outer core and the cylinder housing, the use of master key devices and central locks remains possible. 1007787 «