Enclosed oscillatory compressor, more particularly refrigerating compressor

Claim 1

AN ENCLOSED OSCILLATORY COMPRESSOR HAVING AN ELECTRICAL VIRATORY DRIVE OPERATING ON THE PLUNGER PISTON PRINCIPLE COMPRISING A PERMANENT MAGNET WITH TWO CONCENTRIC POLE PIECES FORMING AN ANNULAR AIR GAP THEREBETWEEN AND EXCITING A MAGNETIC CIRCUIT, A MOVING COIL TO BE SUPPLIED WITH ELECTRIC CURRENT ARRANGED IN THE SAID AIR GAP, A PISTON TUBE EXTENDING BETWEEN THE SUCTION AND DELIVERY SIDES OF LOW AND HIGH PRESSURE ZONES, RESPECTIVELY, OF THE COMPRESSOR AND BEING CONNECTED TO SAID COIL, A NON-RETURN VALVE CLOSING THE DELIVERY END OF SAID TUBE, A CENTRAL GUIDE BORE FOR SAID TUBE IN THE INNER POLE PIECE OF THE PERMANENT MAGNET, A VALVE UNDER SPRING PRESSURE FOR CLOSING THE DELIVERY END OF SAID BORE, SAID VALVES FORMING THEREBETWEEN A PRESSURE ANTECHAMBER, AND INSULATING MEMBER WITH A HEAD PORTION SUPPORTING THE COIL IN THE AIR GAP, THE OPEN SUCTION END OF THE PISTON TUBE BEING HELD IN SAID SUPPORTING MEMBER, AND TWO OPPOSING COMPRESSION SPRINGS ADJUSTED TO ONE ANOTHER AND COMPENSATING THE INERTIA FORCES, ARRANGED ONE ABOVEE AND THE OTHER BELOW THE SAID HEAD PORTION, AND AN ELECTRIC CIRCUIT CONNECTING SAID COIL TO A SOURCE OF ALTERNATING ELECTRIC CURRENT COMPRISING SAID COMPRESSION SPRINGS, AND TWO CABLES FED FROM SAID SOURCE AND CONNECTED TO THE