La Telemecanique Electrique

Michel Lepine

Michel Nicolas

Andre Vergez

A small electrically operated valve in which a control solenoid sub-assembly is mechanically associated in a non-dismantleable fashion by means of a face with the corresponding face of a pneumatic switching sub-assembly having a valve member. Each of the two sub-assemblies is of plastics material and comprises passage portions which may be brought into aligned relationship to form at least one aligned passage capable of receiving at least one small cylindrical metal pin, a first end thereof being positioned below the surface at which the entry of the aligned passage opens, while the other end is in the vicinity of a metal protective portion which is positioned inaccessibly in either one of the two sub-assemblies and which is disposed substantially transversely to the axis of said aligned passage.

Small tamper-proof electrically operated valve

A small low power electromagnetic valve is provided using valving means for providing pneumatic switching. Two orifices connected respectively to the pressure and to the discharge side are alternately closed by a first valving means carried by the plunger core of an electromagnet and respectively by a second valving means associated with a weak spring; a lever receives one end of the plunger core and the active face of said second valving means at pivoting distances, 1 and L, such that ##EQU1## where .phi..sub.1 and .phi..sub.2 are diameters of the orifices.

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Levallois Perret, France

Michel Lepine