Abstract: A method of making a data carrier medium comprising a first carrier layer and a graphical inscription on said first carrier layer and constituted, for example, by a text, by a photograph, or by digital data. The method comprises the steps consisting in performing the graphical inscription by depositing at least one metal lithographic deposition of metal on the first carrier layer, in supplying the first carrier layer made of a transparent material, and further in placing a second carrier layer made of a transparent material in superposition on the first carrier layer so as to protect the graphical inscription.

Abstract: A method of making a data carrier medium comprising a first carrier layer and a graphical inscription on said first carrier layer and constituted, for example, by a text, by a photograph, or by digital data. The method comprises the steps consisting in performing the graphical inscription by depositing at least one metal lithographic deposition of metal on the first carrier layer, in supplying the first carrier layer made of a transparent material, and further in placing a second carrier layer made of a transparent material in superposition on the first carrier layer so as to protect the graphical inscription.

Abstract: A method and device for automatic spectrometric analysis of a liquid, particularly of milk, is provided. A plate with an aperture is inserted into a cell containing the liquid. The plate is then withdrawn from the cell, leaving the aperture filled with a defined volume of the liquid. A jet of air is used to deposit the volume of liquid onto a plaque. The plaque is then moved into vertical alignment with the spreading device. The spreading device includes a bent wire rotatable by, for example, a motor for spreading the liquid into a circular spot. Preferably, the spot is dried while it is being spread. The plaque is then moved adjacent to a spectrometric analysis device for, for example, passing infrared radiation through the sample and to a detector, preferably configured to detect several wavelengths. The plaque carrying the sample is then moved to a cleaning station where it is cleaned by wiping the spot, preferably with a tape of filter paper wetted with detergent or solvent.

Abstract: The device consists of a key having a passive memory zone and a circulating register, the code contained in the passive zone being intended to be transferred to the circulating register when the key is introduced into a lock, so that the said code may be transferred from the circulating register to the lock to be compared there with a reference code contained in the lock. The key comprises a circuit which is provided with a counter which is incremented each time voltage is applied to the key and a system for resetting the counter to zero, when the code is successfully transferred from the key, so that after a number of attempts determined by the counter of unsuccessful transfer attempts, the passive memory zone is destroyed by the output signal emitted by the counter.

Abstract: A device for sampling and measuring the flow rate of a continuously or intermittently circulating liquid, more particularly a foaming liquid, such as milk, comprises means for taking a sample of the liquid in proportions which are accurate and constant over time, a container for the sample thus taken and electric means for measuring the volume of the sample directly in the container. The sampling means comprise a cylindrical chamber into which the liquid is admitted via an inverted funnel-shaped head and distributed uniformly over a conical surface arranged at a small distance from the head, one or more lateral openings provided in the wall of the cylindrical chamber and opening into the container, and finally at least one opening for discharging the liquid.