Abstract: This invention relates to a display apparatus mounted on the front face of a programmable logic controller equipped with input-output modules or couplers (12) and characterized in that it is composed of a diode matrix (3) driven by an integrated display control circuit (4) linked by a series connection (S) to the digital-Boolean processor of the programmable logic controller (9).

Abstract: An electronic device for inserting an electronic card. The device has a fixed housing with a slot at the back for a connector and a slot at the front for engaging the card. A gripping device carries the electronic card. The gripping device includes a receptacle into which the card is inserted at its front end, with the back of the receptacle covering the card insertion slot. The gripping device also cooperates with an extraction device placed along the card. The extraction device includes a shoulder that comes into contact with the back end of the card to extract the card.

Abstract: Modular type subrack, in particular for programmable automatic controllers, which includes a plurality of modular compartments. Each part of the modular compartment that is not equipped with a functional module houses a dummy module that is, for example, snap-fastenable via a resilient tang to a locking member on a vertical partition of the subrack.

Abstract: Terminal block for automation device, notably for programmable controller, mounted movably and electrically connected to an interface module. The lateral wall of the body of the terminal block which is situated on the side of the openings for passage of the flexible leads connected the units of the automated system comprises a pivoting flap.

Abstract: Modular electronic unit comprised of pivotably mounted modules leaning against a support in the form of a plate, notably for programmable controllers. A tightening spring is placed between the housing of each module and the support, near the lower rear end of the housing, and is gradually brought under stress by pressing on a heel during pivoting of the module, while stops of the housing come and rest frontally against the web plate of the support.

Abstract: Apparatus to supply breathing gas to a diver. A pressure-reducing valve is opened and closed by a piston actuated by an extended rod whose end is coupled to an articulated control lever which is driven by a diaphragm. By increasing the distance from the articulated lever, through the rod to the pressure-reducing valve, the risk of icing caused by cooling energy generated at the pressure-reducing valve when the diver operates in very cold water is eliminated.

Abstract: An expander for compressed gas of the type having a valve 12, 13 delivering an expanded gas at 50 from a high pressure gas 6, 7, and a pilot expander 21 delivering via 41 a gaseous control charge into the compartment 17 of the principal expander. Useful in delivering respiratory gas in underwater diving.