Abstract: A burner has a burner tube and a nozzle holder mounted in one end of the burner tube. An igniter is positioned within the nozzle holder and acts to ignite any of the multi-liquid fuels which may be used with the burner. A nozzle emits atomized liquid fuel under the venturi effect of the nozzle with compressed air being supplied to the nozzle. Primary air holes extend circumferentially around the nozzle holder to admit air radially which passes directly to the burner tube. Secondary air holes extend around the inside circumference of the burner tube on the secondary air injection plate and admit air axially to the burner tube.

Abstract: A field installable choke tube apparatus and a method for installing the choke tube into a pulsation dampener of a compressor. The choke tube is insertable into the pulsation dampener through the opening between the nozzle and the pulsation dampener with a plurality of support arms in a retracted position. The support arms are extended after insertion of the choke tube to maintain the choke tube in a secure and predetermined position within the dampener.

Abstract: A pipe handling method to move the tubulars used from a horizontal position on a piperack adjacent the well bore to a vertical position over the wall centre or a mousehole which utilizes bicep and forearm assemblies and a gripper head for attachment to a tubular. The path of the tubular being moved is close to the conventional path of the tubular utilizing known cable transfer techniques so as to allow access to the drill floor through the V-door of the drill rig.

Abstract: A fiber optic controller comprises a keyboard having a plurality of keys. Each key has a transmitting fiber and a receiving fiber wired therein. Light is provided to the transmitting fiber by a light emitting diode and travels to the key and, thence, to the receiving fiber by way of a reflective surface on the key which reflects the light when the key is in a depressed or "on" position. An electronic controller is controlled by signals from photo transistors which signals are initiated when light is transmitted by the receiving fiber to the photo transistor. The electronic controller, in turn, activates a power circuit which powers various of the operating components of a spa or hot tub.

Abstract: A burner has a burner tube and a nozzle holder mounted in one end of the burner tube. An igniter is positioned within the nozzle holder and acts to ignite any of the multi-liquid fuels which may be used with the burner. A nozzle emits atomized liquid fuel under the venturi effect of the nozzle with compressed air being supplied to the nozzle. Primary air holes extend circumferentially around the nozzle holder to admit air radially which passes directly to the burner tube. Secondary air holes extend around the inside circumference of the burner tube on the secondary air injection plate and admit air axially to the burner tube.

Abstract: A power meter (10) is provided which can plug into an electric wall socket and it is provided with its own socket (16) for receiving the plug of an electrical appliance. The power meter has means for measuring electric current flow to an electrical appliance and indicates the amount of electrical power consumed by an appliance. In alternative embodiments, the meter is provided as an integral part of an electric wall switch (30) or wall socket (40) or it is built into an electrical appliance (50). In another embodiment, the power meter has a plurality of sockets for receiving the plugs of a number of electrical appliances for separately indicating the power consumption of each appliance.

Abstract: A control system controls a combustion burner. The system has an ignition electrode to create a flame in a burner, and a first temperature sensor to sense the temperature of the flame. A control terminates the operation of the ignition electrode when a predetermined temperature is sensed by the temperature sensor.

Abstract: An emergency shut-down system to close a gate valve in a pipeline and therefore terminate flow. The closing action is initiated when a pilot valve senses pressure in the pipeline outside predetermined limits. This reduces the signal pressure in the system which, in turn, causes a fluid dump from the gate valve actuator which closes the gate valve and terminates fluid flow in the pipeline. The system is reactivated by manually pumping the system which re-opens the gate valve and allows fluid flow in the pipeline to again continue.

Abstract: A utility pull box for use in electrical power feed and distribution networks. The pull box is made in a hexagonal configuration with six panels of equal width, all having the same included angle between adjacent panels. A plurality of knock-out windows are located in the lower area of the panels and serve as entranceways for cable carrying ducts which cables are to be connected to appropriate buss hardware located in the interior of the utility box.

Abstract: A cushion connector (10) used for above ground drilling has pin (11) and box (12) components at opposite ends. A housing (13) extends axially between the pin and box components. A drive spline (22) is operably connected to one of the components and extends outwardly from the axis (23) of the cushion connector (10). A plurality of drive blocks (24) extend inwardly from the inside diameter of the housing (13) and engage with keyways (69) of the drive spline (22). Drive lugs (71) connected to the inside of the housing (13) act on the drive blocks (24) and resilient cushion blocks (70). A spring (30, 60) extends between the pin (11) and box (12) components within the housing (13) and exerts axial force between them. The drive splines (22) are coaxial with the connector (10) and move axially under operation. Cushion blocks (70) are provided between the drive blocks (24) and drive lugs (71).

Abstract: A process for the extraction of copper from a copper ore or concentrate comprises first subjecting the ore or concentrate to agitation leaching at an elevated temperature and pressure in the presence of oxygen and water to obtain a resulting acidic leach liquor which contains dissolved copper. The acidity of the resulting acidic leach liquor is then reduced by affecting percolation leaching of a bed of low grade copper ore or waste rock with the resulting acidic leach liquor, whereby the pH of the leach liquor is raised, for example to a value of about 1.5 to 2. In a preferred embodiment the bed of low grade ore or waste rock is in the form of a heap and the percolation leaching comprises heap leaching.

Abstract: A fuel inlet system (12) for an internal combustion engine (10) comprises a heat exchanger (22), heated by engine exhaust gases, to preheat air being supplied to a carburetor (14). The air is introduced into the carburetor (14) at a temperature of between about 375.degree. to 400.degree. F. The carburetor (14) has an annular heating chamber (122) in which the heated air is circulated. A fuel inlet conduit (63) is in thermal contact with the heated air in the heating chamber (122) to preheat the fuel. The air and fuel is mixed in two stages, the first being during travel along a conduit (144) and the second in a mixing chamber (170) in the carburetor (14). The carburetor (14) includes a valve (148) for restricting the amount of air flowing to the mixing chamber (170). The fuel inlet system (12) further comprises means (20) for adding water to the air/fuel mixture.

Abstract: A pressure responsive pilot control valve has a spool which is movable by a metal diaphragm sensing the pressure in a flowline. The spool includes two poppet seal rings mounted thereon, the poppet seal rings having concentric axes and which are used for opening and closing fluid ports. The fluid ports are opened and closed for the purpose of sending a signal to a latching relay valve to bleed off a shut in valve actuator which will terminate flow in the flowline. The poppet seal rings of the pilot move responsive to a high or a low pressure condition. A low pressure spring is provided for measuring a low pressure condition and a high pressure spring is provided for measuring a high pressure condition.

Abstract: A modification kit for the DeHavilland DH-2 Beaver and the DH-3 Otter aircraft. A replacement leading edge is provided for the wing together with replacement droop wing tips and a wing fence. A flap gap seal is provided to close the gap between the trailing edge of the wing and the leading edge of the flaps when the flaps are extended. The addition of these modifications modifies the performing characteristics of the airplane in an enhanced manner, particularly during take off and landing.

Abstract: Method and apparatus for forming spot mounds used in assisting the germination and growth of tree seedlings in reforestation. A crawler moves forwardly while a digging blade connected to a frame is lowered into the soil in order to overturn the soil and form a mound. After the digging blade is lowered into the ground, the digging blade rotates so as to better form and thereafter pass the formed mound without interference.

Abstract: A method of replacing an existing underground pipe (44) with a new pipe (48) comprises the steps of moving a pipe removing tool (70) along the existing pipe (44) to remove the existing pipe and dragging the new pipe (48) behind the tool (70) to replace the existing pipe while imparting vibratory motion to the tool (70) or continuously applying a dressing material ahead of the new pipe to act as lubricant or to fill in the annular space between the new pipe and the surrounding soil. According to another embodiment, the method comprises the steps of pushing out the old pipe (126) in one direction by means of a pipe removing tool (110) connected to a hydraulic unit (10) through a stem and replacing the old pipe (126) by means of a new pipe (48) by dragging the new pipe along behind the stem moving in the opposite direction during a return run.

Abstract: An engine air shutdown valve comprising a gate which is movable from a first position wherein the air flow passage of an engine is relatively unimpeded to a second position where the air flow passage is closed thereby terminating operation of the engine. A trip spindle maintains the gate in its open position with a ball release. Upon activation of the ball release, the gate moves parallel to the direction of air flow through the passage to terminate the air flow.

Abstract: An engine shutdown valve comprises a housing and a gate movable within a housing between a first position where the air flow through the shutdown valve is substantially unrestricted to a second position where the opening is restricted thereby stopping air flow. The gate is pivotable about an axis and a drive is located concentrically about the axis to rotate with the gate. The drive has a recess which is engageable by a piston movable between a first position where the gate is held in its latched position and a second position out of engagement with the recess so as to allow the gate to move to a position where the air passageway is closed. The piston assembly is located substantially wholly within the housing with only the piston of the piston assembly extending therefrom. The housing is divided into two halves joined together with cap screws having axes transverse to the axis of rotation of the gate.

Abstract: A method of combatting foot odors comprising the step of soaking the feet in a soaking solution comprising as active ingredient, ferric ferrocyanide, represented by the formula Fe(III).sub.4 [FE(CN).sub.6 ].sub.3, in an aqueous oxalic acid solution.