Abstract: Attic fans of improved and economical design, wherein the blade hub, which in conventional attic fans is a cast hub is eliminated, and wherein the pulley on the blade shaft is eliminated.

Abstract: The invention relates to a refrigeration type motor compressor assembly in which an integrated motor compressor unit is resiliently mounted. The motor stator includes a stack of rectangularly shaped laminations with bevelled corners. Stator bolts extend upwardly through the laminations with the bolt heads projecting downwardly from the lower surface of the laminations. The resilient suspension system includes four generally cone shaped spring retaining abutment members attachable from below to the four corners of the stack of laminations. These abutment members have recesses for receiving the bolt heads and collars which extend outwardly beyond the bevelled corners of the stack of laminations. The collars are abuttingly engageable with the inner surface of the casing during lateral movement of the spring mounted motor compressor unit to provide bumper protection for this unit.

Abstract: A hydraulic power source for harnessing energy generated by the wave motion of a body of water. A primary or main float has a plurality of secondary or satellite floats spaced outwardly therefrom. The secondary floats are each attached to one end of a plurality of lever arms, the other ends thereof being attached to a plurality of rotatable shafts carried by the primary float so that up/down motion of the lever arms is translated into rotational motion of the shafts. When placed upon a body of water, the wave motion causes the secondary floats to be displaced upwardly or downwardly relative to the primary float. The motion of the secondary floats is translated by the generally vertical movement of the lever arms to the shafts to rotate the shafts. The rotational motion of the shafts is translated into linear motion within the primary float by means of interacting cam surfaces which activate pistons of linear pumps.

Abstract: According to the present invention, fluid rotary machines including a turbo-compressor, turbo-desiccator, turbo-refrigerator, turbo-generator and the like are of such an arrangement that supporting shafts corresponding to impellers in number and a gear train changing R.P.M. of said supporting shafts to the optimum R.P.M. of the impellers mounted on said supporting shafts are provided, so that the respective impellers can operate at the optimum R.P.M. individually.

Abstract: A concrete pumping unit comprising a pair of parallel piston pumps, alternately placed in communication with a concrete supply conduit and with a concrete delivery pipe, through a single baffle blade valve and respectively driven by coaxial fluid pressure piston cylinders is disclosed. The cylinders are interlocked with each other by a pipe which places in communication the chambers of said fluid pressure cylinders, opposite to the chambers in which the pressurized fluid is supplied and discharged through orifices near the ends of said cylinders. A hydraulic circuit is provided for placing a fluid supply pump, in communication with the fluid pressure piston cylinder performing the suction phase, while the orifice of the other fluid pressure piston cylinder is placed in communication through another circuit including, a four-way changeover electro-valve and an actuator distributor device with a discharge reservoir.

Abstract: A two-stage pump having a low and high pressure stages having a casing with a pair of pumps positioned therein, with one pump being a low pressure stage unit and the other pump being a high pressure stage unit. Each of the pumps has a fluid inlet and a fluid outlet with the outlet of the low stage pump being in fluid flow relation with an outlet port from the casing and also the fluid inlet of the high stage pump. The low stage pump is supplied with fluid through internal flow passages in the casing and associated structure including a flow passage through a rotatable element of the high stage pump.

Abstract: Vacuum pump of reciprocating piston and cylinder type. Cylinder is stepped to have front large diameter portion and rear small diameter portion. Piston has enlarged head portion sliding in front portion of cylinder and rear portion sliding in rear portion of cylinder. Front end of cylinder is closed to form high vacuum pumping chamber swept by front face of piston head. Gas enters the high vacuum pumping chamber through side wall of cylinder and can be exhausted through exhaust valve in closed front end of cylinder. Rear annular face of piston head sweeps lower vacuum chamber in cylinder behind the piston head. A gas transfer passage extends through cylinder wall from front end of high vacuum pumping chamber to port in cylinder wall so as to transfer gas from high vacuum chamber to lower vacuum chamber when piston approaches end of forward stroke. Gas is transferred through transfer duct at pressures lower than required to open the exhaust valve.

Abstract: A pump unit comprises a housing defining a pumping chamber, a fluid inlet and a fluid outlet communicate with the pumping chamber. A pair of cooperating gear members are located in the pumping chamber to pump fluid from the inlet to the outlet. A pintle member and a valve seat are located in the outlet and an electric motor is provided for moving the pintle member relative to the valve seat. The pintle member and valve seat comprise a variable orifice. The pump unit also includes a bypass valve for bypassing fluid from the outlet to the inlet to thereby control flow of fluid to the system. The amount of fluid which is bypassed is controlled by a spool valve member which is movable in response to forces acting thereon. The spool valve member is acted upon by the pressure drop across the variable orifice. Thus, by adjusting the size of the orifice, the position of the spool valve can be controlled and as a result the amount of flow to the system can be controlled.

Abstract: A sprocket wheel arrangement adopted particularly for drives in mining machines as, for example, push-plate conveyors and mining equipment. The number of teeth on the sprocket wheel is smaller than the number of seats between the working surfaces of the teeth and cooperating with chain links passing over the sprocket wheel. The seats are open from one side, and are provided with retaining walls only from the side of the teeth. The planes of bottom lands of adjacent seats intersect and form, thereby, an edge. The sprocket wheel arrangement may be used in driving systems of both coil chains and fish-plate chains.

Abstract: A magnet is fixed to a rotor shaft and a ferromagnetic cup which is magnetically coupled to the magnet is urged opposite to the direction of rotation of the rotor shaft by a spring. An occluder plate is fixed to the cup and is movable into alignment with a fluid inlet to block the same. As the speed of the automobile and thereby the compressor rotor shaft speed increase the magnetic fields resulting from eddy currents induced by the magnet in the cup increase and the degree of magnetic coupling thereby increases so that the cup is rotated further against the force of the spring causing the occluder plate to block the inlet to a greater extent so that the compressor output and thereby the cooling effect of the air conditioner are maintained at a substantially constant value.

Abstract: A device using only steam to simultaneously heat and pump a liquid or a slurry to a high pressure is disclosed, which device does not employ any rotating or reciprocating mechanisms commonly employed in the conventional pumping machinery. The combined use of steam for the simultaneous heating and pumping enables the outstanding device to utilize 100 percent of the steam supplied to the device in either pumping or heating. The simple structure and operational principle of said device results in particularly low capital cost and trouble-free operation.

Abstract: Apparatus having fuel combustion cylinders for urging the rods of pistons operating therein through power strokes, and fluid pressure pistons, also operating in cooperating cylinders, which are correspondingly urged during said power strokes through movement causing the production of a pressure fluid which is thereafter utilized, on demand, to do work. In the transmission of said movement-producing forces of said fuel-powered apparatus input to said pressure fluid output, a linkage mechanism is advantageously utilized to provide a pressure pattern in the pressure fluid which starts at an optimum low value and progressively builds up. This effectively reverses the pressure pattern of the combustion fuel which consists of a rapid-expansion gas having an initial maximum value and, due to expansion, progressively diminishes in value.

Abstract: A high-vacuum pump is disclosed as including a molecular pump assembly and an oil-seated rotary pump assembly, a speed change mechanism being interposed between the two assemblies so as to transmit driving forces, with a predetermined ratio, between the assemblies. The molecular pump assembly includes a housing having inlet and outlet ports, and spiral grooves, including main and subsidiary grooves, are provided upon interior wall surfaces of the housing so as to establish fluidic communication between the ports. A vacuum-sealed rotor, suitably mounted upon a first drive shaft, is rotatably disposed within the housing so as to achieve a compression and pumping operation of fluid along the spiral grooves from the inlet port to the outlet port, and the oil-sealed rotary pump assembly is likewise provided with inlet and outlet ports, the inlet port thereof being directly connected to the outlet port of the molecular pump assembly.

Abstract: The invention is a reciprocating mechanism for piston driven internal and external combustion engines. The design presented consists of an intra-articulate connecting rod system operating in conjunction with a compound crankshaft. The advantage of this system over the ordinary reciprocating mechanism employed in other engine systems, is seen to be in the reduction of piston speed during the initial expansion process thus allowing higher combustion pressures to develope at more effective crank angles past the top neutral center position of shaft rotation.

Abstract: A motor-pump assemblage for circulating a coolant through a system requiring heat transfer has a motor casing filled with liquid and mounted on the motor drive shaft a flywheel keyed to the shaft and a freewheeling shroud rotatable relative to the shaft and the flywheel. This shroud encompasses the flywheel but is spaced apart therefrom and includes passages for ingress and egress of liquid into the space between the flywheel and the shroud and out of this space.

Abstract: A device for transmitting torque between two rotatable, radially shiftable members is provided with a plurality of three segment linkages pivotally coupled to one another through their respective centers of mass such that the device remains dynamically balanced during operation.

Abstract: The float switch is for control of a submersible sump pump or the like and has a housing, a switch in the housing and with the switch having a spring control member extending therefrom to turn the switch on and off with movement of such control member, leads connecting to the switch and extending from the housing to the power controlled circuit. An activator arm is pivotally positioned in the housing for gravity actuated pivotal movement towards and away from the switch for engaging and moving the control member to switch closed position and to release it for switch opening action, the position of the activator arm being controlled by gravity and the float switch being permitted only limited movement with fluctuations in the water level in the sump by the leads secured thereto.

Abstract: A plurality of actuator members are mounted along the surface of a roadway in the path of vehicular traffic, so as to be actuated as the wheels of vehicles pass thereover. Beneath each actuator is a chamber formed of resilient material, one of the walls of this chamber being deflected inwardly in response to an associated actuator. The chambers are filled with gas and connected to each other in series by means of a suitable valving arrangement. The gas contained within the chambers, which is preferably air, is compressed by virtue of the actuation of the chamber, gas being fed from chamber to chamber such that successively higher gas compression levels will be reached at succeeding chamber stages in the chain. To facilitate the actuation of the higher level compression stages the actuation surfaces thereof are made to have a decreased area so that greater force per unit area can be provided for a given weight vehicle.

Abstract: A portable air compressor comprising a pump and pump drive unit mounted on a wheel-supported base and totally enclosed within a sheet metal shroud that also serves as a support for a storage tank; the shroud is pivotally mounted on the base for movement to an open position in which the pump and drive unit are fully exposed for inspection and maintenance.

Abstract: Compression machinery including a low pressure stage, a high pressure stage and a single aftercooler, further includes a bypass path through which fluid discharged from the low pressure stage is directed about the high pressure stage. The bypass path includes the aftercooler. Upon activation of the high pressure stage, a portion of the fluid flowing through the bypass path is diverted to the suction side of the high pressure stage. As a result of continued operation of the high pressure stage, the flow of fluid through the bypass path is decreased and the flow of fluid through the high pressure stage is increased.