Abstract: A method of establishing part-load operation is proposed for a turbine group. This gas turbine group consists essentially of a compressor unit (1), of an HP combustion chamber (4) downstream of the compressor unit (1), of an HP turbine (5) downstream of this HP combustion chamber (4), of an LP combustion chamber (8) operating by self-ignition and arranged downstream of the HP turbine (5), the hot gases (10) of which LP combustion chamber (8) being admitted to an LP turbine (11). The temperature at outlet from the HP turbine (5) remains essentially the same due to the reduction of the fuel quantity in the LP combustion chamber (8) to zero. Furthermore, the fuel quantity of the HP combustion chamber (4) remains approximately constant during the reduction of the fuel quantity in the LP combustion chamber (8) so that the temperature at inlet to the HP turbine (5) likewise remains constant.

Abstract: A refrigerant compressor includes a compressor housing divided at least partially by a valve plate into a first chamber comprising a compression chamber, and a second chamber comprising a discharge chamber. A fluid conduit links the compression chamber with the discharge chamber. An elastic valve member opens and closes the end of the conduit. The valve member has a predetermined spring constant such that the end opening of the conduit remains blocked until the pressure in the compression chamber reaches a predetermined value. An integral gasket is positioned between the valve plate and the front and rear housings and comprises an outermost, an intermediate and an innermost annular portion chamber. Outer ribs are connected between the outermost and the intermediate annular portion, and inner ribs are connected between the intermediate and the innermost annular portions.

Abstract: A fence slat locking system includes elongated plastic slats weaved between consecutive links in a chain link fence. Each slat has a wall that is curved at the lateral sides. The bottom end of the slat is notched on opposite lateral sides defining a set of slat ears. A rail is weaved horizontally between the links of the chain link fence and attached with the bottom end of each slat. By inserting the bottom end of the slat vertically downward into a rail slot, the slat ears start to flatten moving the curved tips laterally away from the central longitudinal axis of the slat. Inserting the slat further vertically downward into the rail channel allow the slat ears to snap back into their original curved cross-sectional profile allowing the curved tips of the slat ears to snap back underneath a retaining section in the rail. The "snap back" action automatically locks the fence slat into the rail.

Abstract: A rotary plug 1 has recesses 5 debouching on its side face 12 which are in communication with the inlet 6 and recesses 5 debouching on its side face 13 which are in communication with the outlet 7. These recesses 5 pass across a port 4 which permits passage to and from a unit consisting of cylinder 2 and piston 3.

Abstract: The invention concerns a suction-controlled vane-cell pump whose pumped flow does not increase further above a determined speed but remains practically constant. Radially movable vanes (4), arranged in a rotor (2), form working chambers (12). Between the vanes (4) the rotor (2) has control slots (21) which cooperate with several outlets (22 or 22A) of a front plate (5) located in a pressure zone. The control slots (21) and the outlets (22 or 22A) are dimensioned so that a reflux of oil under pressure can be avoided from a higher-pressure working chamber (12) into a lower-pressure working chamber. The outlets (22 and 22A) are closed by a valve (24) with movable tongues (25, 25A). During the opening stroke, the tongues (25, 25A) rest on a supporting body (26). Suction openings (13 and 13A) communicate with a suction chamber (14) through throttle bores (31, 31A) in order to limit the suction current. Wear due to cavitation can be avoided by the invention.

Abstract: A miniature dual syringe-type pump assembly which has a high aspect ratio and which is remotely controlled, for use such as in a small diameter penetrometer cone or well packer used in water contamination applications. The pump assembly may be used to supply and remove a reagent to a water contamination sensor, for example, and includes a motor, gearhead and motor encoder assembly for turning a drive screw for an actuator which provides pushing on one syringe and pulling on the other syringe for injecting new reagent and withdrawing used reagent from an associated sensor.

Abstract: In a gas turbine combustion chamber, which consists of an inlet zone (1) with injection, an ignition delay zone (2), a reaction zone (3), a burn-out zone (4) and a transition zone (5) to the turbine, the reaction zone (3) has a cross-section which increases in such a way that the gas dynamics of the combustion process can take place at constant pressure or constant Mach number. By this means, the total pressure loss and the combustion chamber length necessary for the combustion are reduced and this is reflected in an improvement to the efficiency and the output.

Abstract: A scroll compressor has a closed container 1 with a bottom serving as an oil storage 10 reserving lubricating oil 9. A gas-liquid separator 28 is provided near the closed container 1. An intake pipe 23 is connected to an upper end of the gas-liquid separator 28. An intake gas connecting pipe 29 extends normal to the axial direction of the gas-liquid separator 28 to connect the upper part of the gas-liquid separator 28 with the closed container 1. Meanwhile, a connecting pipe 24 is provided to connect the bottom of the gas-liquid separator 28 with the oil storage 10 in the closed container 1. Furthermore, there in provided a filter 30 between the intake pipe 23 and the intake gas connecting pipe 29. Thus, oil amount introduced into the compressor is reduced. Reliability is increased, and efficiency of air-conditioning apparatus is improved.

Abstract: A hermetically sealed compressor has a fan for cooling the motor of the compressor. The compressor utilizes the refrigerant vapor inside the hermetic shell to cool the motor. The fan is attached to the end of the motor rotor and crankshaft to circulate the suction gas of the compressor around and through the motor rotor and motor stator to absorb heat and then directs the suction gas against the hermetic shell in a spiralling motion for transferring heat to the shell which in turn transfers heat to the atmosphere.

Abstract: In a water ring type vacuum pump, an impeller (6) having a plurality of blades (6a) is rotatably provided in a pump chamber (3) communicating with an air inlet (1b) and an air outlet (1d), and a water inlet (1a) for feeding sealing water to a center portion of the pump chamber is further provided. Sealing water that has moved to a peripheral wall portion (3a) of the pump chamber (3) flows back to a center portion (3b) of the pump chamber (3). By this arrangement, the sealability of sealing water can be improved and the sealing water can be saved in amount.

Abstract: A two stage pump has coaxial first and second stage reciprocating pumps with the second stage piston reciprocably driven by the first stage piston. Multiple sets of first and second stage pumps are provided, and the second stage pistons can be returned by supercharge pressure, a loose connection between the first and second stage pistons, or a spring. An accumulator which is charged on a compression stroke and discharged on an intake stroke may also be provided in communication with a pumping chamber to improve the efficiency of a pump.

Abstract: The headrest of an upholstered seating unit is hingedly supported by a spring which biases the headrest to a substantially vertical raised position. The spring prevents the headrest from moving from its raised position when an occupant's head rests against it, but greater forces will bend the spring and move the headrest to a generally horizontal lowered position. The illustrated spring is a pretensioned vertical helical spring which has its lower end mounted forwardly of an upper portion of the furniture frame. The headrest can be moved to its lowered position by a cable/conduit associated with a pair of relatively movable parts of the furniture unit.

Abstract: A regulating and controlling device for a fluid pressure booster installation includes a motor-driven pressure generating unit, a check valve, a relief valve and a pressure switch. The pressure switch has a first cylinder-piston arrangement for connecting the drive motor to a source of electrical energy. The first cylinder-piston arrangement includes a piston rod for contacting an intermediate member. The device has, as an improvement, a second cylinder-piston arrangement, a third cylinder-piston arrangement and a gear unit. The improvement prevents longer-lasting circulation delivery and, accordingly, an overheating of the working fluid. This also avoids any need for the pressure switch to be constructed so as to be adjustable in operation with respect to switch-off pressure or any need to be adjusted when changing the pressure value of the relief valve used for adjusting the pressure at the pressure outlet of the device.

Abstract: An extendible stud, consisting of two substantially identical C-studs each of which has opposed flanges of substantially different widths and inwardly turned lips at the flange outer edges, and each C-stud having an elongate central area in its web located at substantially the middle of said C-stud cross-section, which two C-studs are interconnected by the narrow flange of each being held within the channel formed by the wider flange and the associated lip and web of the other C-stud, and the elongate central areas of the webs of the two C-studs abutting one another.

Abstract: The present disclosure sets forth an improved engine and power output having an in-line powered end and pump end. The powered end incorporates a piston in a cylinder while the pump end also has a piston in a cylinder. A straight rod is connected between the powered end and the pump end so that axial reciprocating motion is created between the powered end and the pump end. The axial motion imparted to the straight rod by the powered end operates the pump end piston and creates axial reciprocating motion, thus eliminating intervening moving parts. A crankcase is included between the powered end and the pump end for enclosing and lubricating the moving components. The powered end preferably comprises a portion of an internal combustion engine.

Abstract: A water pressure control system in which the pressurizing pump is turned on only in response to low pressure but is turned off only in response to low water flow rates. Water flow is detected with a magnetic switch displaced by water movement. After the pump is turned on, it can not be turned off for ten seconds, to smooth operation. When the system is first activated, the pump is turned on for sixty seconds, without regard to the other control functions, to guarantee priming of the pump.

Abstract: A turnbuckle for connecting a hollow section is provided with a catch recess, with a carrier element having a clamping edge shoulder, the turnbuckle including a housing which fits within the hollow section. The housing has a longitudinal axis with an abutment pin fixed in the housing substantially transverse to the longitudinal axis. A clamping spring is movable in a translational manner within the housing, the clamping spring having a clamping finger part formed by two clamping fingers which are movable in mutually opposite directions substantially transverse to the longitudinal axis of the housing. Each clamping finger has a clamping hook end.

Abstract: A rear thrust bearing member is disposed to be in frictional contact with an axial end face of a spindle supported in a cantilever fashion in the neighborhood of and on the rear side of an impeller. Frictional heat that is generated in this part is satisfactorily diffused with a cooling effect provided by the rotation of the impeller in the pump casing and a heat diffusion effect provided by the circulating effect. Thus, a temperature rise of the frictional portions is suppressed, and adverse effects of heat on the surrounding member are prevented.

Abstract: A positive displacement pump includes a relief valve comprising an valve seat, a needle within the valve seat, a spring forcing the needle within the valve seat, a set screw pressing the spring against the needle and a spacer for mounting the set screw to the housing of the positive displacement pump. The relief passages are formed at the intersection of the valve sleeve and the piston. The valve seat threadably connects within the relief valve passageway to prevent the erosion of the passageway. The valve seat may be constructed from a plastic, hard rubber, or metal material and include a rubberized seal secured at one end of the valve seat. When the valve seat erodes to a point where it provides an insufficient seat for the needle, it is removed from within the relief valve passageway and replaced with a similar valve seat.

Abstract: A peristaltic pump has a pump rotor rotatable about an axis. The pump rotor carries a pump roller. An actuating rod extends along the axis of rotation. The rod has a distal end and a proximal end. An actuator mechanism is coupled to the proximal rod end for advancing the rod along the axis of rotation in a forward direction toward the pump rotor and in a rearward direction away from the pump rotor. A linkage mechanism is coupled to the distal rod end for converting advancement of the actuating rod along the axis of rotation in response to the actuator mechanism into movement of the pump roller radially of the axis of rotation between a retracted position free of contact with pump tubing and an extended position making operative contact with pump tubing.