Abstract: A suspension system for hermetic motor-compressors in which a motor-compressor unit is located in a casing formed by two superimposed cup-shaped bodies connected together in a frontal mating position. The motor-compressor unit has at least three radial support arms, each with an aperture at its free end which is oriented in an axial direction relative to the casing. Tubular support brackets are fixed to the side wall of that cup-shaped body acting as the lower portion of the casing in positions corresponding to the free ends of the said arms, each of the brackets carrying within it a bush of plastics material with a cavity which is aligned axially with the aperture of the overlying support arm. The bushes house resilient suspension elements, each of which is lodged at its upper end in the aperture of one of the support arms.

Abstract: The crankshaft is of the type comprising, in succession in its longitudinal direction, a crank pin intended to receive a connecting rod big end, an eccentric of flattened sector shape, and an elongate tubular part, non-coaxial with respect to the crank pin and acting partly as a journal and partly as a support for a rotary member, such as a rotor of an electric motor. The crank pin and the eccentric are made in a single metal piece and the elongate tubular part is constituted by a separate tubular metal piece. The face of the eccentric which is turned towards the tubular piece and the corresponding end of this piece have respective annular formations engaged and retained one in the other by means of welding or glueing.

Abstract: The vertical crankshaft of a hermetic compressor has a longitudinal inner duct for drawing-off oil from the bottom of the hermetic housing. This duct comprises a cylindrical vertical upper duct section which is eccentric relative to the axis of rotation of the shaft, and has its outlet at the upper end of the shaft. At this upper end there is a side outlet passage which comprises a groove made in the upper end face of the shaft and extending from the outlet of the eccentric duct section to the lateral surface of the upper end portion of the shaft in the area in which the outlet and surface are closest together. The bottom of the groove slopes upwards towards the lateral surface.

Abstract: A supply and protection unit for a hermetic compressor of a thermostatically regulated refrigerator comprising an electrically insulating support body (3) adapted to be fixed to the casing of the compressor (P); said support body being provided with cavities (3a, 3b, 3c, 3d and 3e) opening at one of its faces intended to face towards the compressor for slidably and removably inserting therein of a pair of electrical devices (1, 2) and connection means thereof to be supported against the compressor casing, one of said devices being a thermally operated protection switch (1) and the other being a resistor (2) with a positive temperature coefficient.

Abstract: The crankshaft of a crank mechanism has a projecting crank pin which is connected to an eye at the big-end of a connecting rod. An eye at the little-end of the connecting rod is connected to a gudgeon pin attached to the piston, being slidable axially of the gudgeon pin and being kept centered relative to the piston by resilient means. The eye at the big-end of the connecting rod is defined by a bush which is rotatably connected with the crank pin and has a pair of diametrically-opposing pins. The end of the connecting rod associated with the big-end is fork-shaped, and the arms of the fork are each articulated to one of the pins about a pivot axis which is perpendicular to both the axis of the crank pin and the longitudinal axis of the connecting rod.

Abstract: Two different stator windings of an electric motor are separated by insulating elements of die-cut sheet material. Each of these elements comprises a pair of end panels which separate the windings at the two ends of the stator, and a series of parallel strips which interconnect the end panels and each of which extends within one of the stator slots. One of the end panels has, extending from its edge opposite that from which the strips extend, at least two consecutive flaps folded one over the other in the manner of a sleeve. The sleeves of the insulating elements receive the joins between the wires of the windings and the associated supply leads.

Abstract: In a compressor for refrigerant fluids, the thrust bearing for a vertical crankshaft comprises, on the one hand, an annular element of a material with a low coefficient of friction, which is rotatable with a main journal above the shaft and has a flat lower radial surface, and comprises, on the other hand, a flat radial surface machined on an upper main bearing fixed in the compressor casing. The lower surface of the annular element bears upon the flat radial surface of the upper main bearing.