Our patent, magnetic flux coding


◢ Our principle – a world first!


Most coded locking systems are designed around a key-locked mechanism. The code is determined by the key profile that has varying levels of complexity. The keyhole, used to transmit the code, is an essential, and vulnerable, part of the design.

Our groundbreaking concept uses a mechanism that does not require key penetration and has no external power requirement.

Perfect control of the channelled magnetic flux generates ultra high-precision power and offers countless coding options. The lock is opened using a magnetically-coded key that activates the cylinder’s mobile components with no mechanical contact. The coded module assembly located in the cylinder is sheathed and fully leaktight. The products are particularly suited to use in hostile environments (vandalismcorrosionpresence of sandmoisturefrostetc.)

Note that some developments were produced under a project co-financed by the European Union (European Regional Development Fund – ERDF).



◢ Some notes on magnetism

The patented concept used in the locking systems designed by C.I.S.M is based on the knowledge, expertise and use of magnetic properties to produce highly sophisticated, tamper-proof magnetically-coded cylinders. Our planet is in itself a giant magnet with a north pole and a south pole. The planet is surrounded by a magnetic field…just like all permanent magnetic devices! Magnetism is a rather strange force that is neither seen nor felt.

Humans have been using this force for hundreds of years already. One of the very first applications was for the ship compass, which dates back to 1250 A.D. Today, permanent magnets are used in most of the major technological devices and across a huge range of sectors. Medicine, aerospace, automotive, rail, the military, etc.


What is a permanent magnet?

A permanent magnet is a material that, following exposure to a magnetic field of greater or lesser intensity, is capable of retaining its magnetism after removal of the magnetizing force. We refer to this as magnetic remanence or magnetic flux density. There are a number of different grades of material that can be used as permanent magnets. Depending on the applications and the desired performance, this involves the use of materials of various grades that will provide variable characteristics.

For its magnetic coding applications, the C.I.S.M. Tech team has deliberately chosen “rare earth” magnets that currently provide the best level of performance.
Neodyme provides the best power product, which is why it was selected by C.I.S.M. Magnets produced with this type of material offer a wider range of technological options due to their ultra-high power capacity.

We have to roll-out a fairly complex manufacturing process in order to achieve the magnetic saturation of these products, and we have very high quality requirements.
Our systematic acceptance inspections and controls, that include the effective measurement of magnetic performance, mean that we can guarantee the reliability of our systems.

Lastly, the C.I.S.M. Tech team has the ability to carry out highly sophisticated computer simulations on magnetism. These simulations are then validated by full-scale tests in real-life conditions.