Abstract: A shielding gas (SG) flow controller for an arc welder includes SG input/output with a controllable valve therebetween, and having a control input, and a controller having a first input receiving a welding signal representing arc current and a gas flow setting controller generating a flow setting output based on the welding signal, representing a desired SG flow. Input and output pressure sensors provide SG input and out pressure to second and third controller inputs, respectively. A flow setting output modifier modifies the flow setting output of the gas flow setting controller based on the SG input/output pressure, the welding signal, and a characteristic of the controllable valve into a control signal input to the control input of the controllable gas valve to maintain a substantially constant SG flow corresponding to the flow setting output substantially independent of actual SG input/output pressures.

Abstract: An anchor tool for anchoring a downhole tool within a casing, a well, or any other downhole, hollow space. The tool has a longitudinal tool body with a center axis extending through the tool body in the center of the body, a first recess, a second recess, a third recess, and a fourth recess in the tool body; and a first anchor, a second anchor, a third anchor, and a fourth anchor. The first anchor is provided in the first recess, and so forth, and the anchors are outwards movable in the recesses for anchoring the tool. Each anchor provided in the recesses extends through the tool body transverse to and across the center axis and the anchors and the corresponding recesses are situated in the tool body for providing a symmetrical anchoring of the anchor tool.

Abstract: A stroker tool for providing an axial force in an axial direction of a downhole tool. The stroker tool has a pump, a driving unit for driving the pump, and an axial force generator. The generator has an elongated piston housing having a first and a second end, and a piston provided on a shaft, and the shaft penetrates the housing for transmitting the axial force to another tool. The piston is provided in the piston housing so that the shaft penetrates the piston and each end of the piston housing and divides the housing into a first and a second chamber, and the first and the second chamber are each fluidly connected to the pump via at least one duct so that the pump can pump fluid into one chamber by sucking fluid from the other chamber for moving the piston within the housing, and thereby moving the shaft back and forth.

Abstract: A drilling head, method of drilling, and use of the drilling head, for reboring a stuck valve or drilling into the formation downhole and, in particular a drilling tool having a drilling head and a driving unit. The drilling head includes a hole saw beside a drill bit for cutting out a piece from the stuck valve. A drilling system includes the drilling tool and a driving tool for moving the drilling tool downhole.

Abstract: A shielding gas (SG) flow controller for an arc welder includes SG input/output with a controllable valve therebetween, and having a control input, and a controller having a first input receiving a welding signal representing arc current and a gas flow setting controller generating a flow setting output based on the welding signal, representing a desired SG flow. Input and output pressure sensors provide SG input and out pressure to second and third controller inputs, respectively. A flow setting output modifier modifies the flow setting output of the gas flow setting controller based on the SG input/output pressure, the welding signal, and a characteristic of the controllable valve into a control signal input to the control input of the controllable gas valve to maintain a substantially constant SG flow corresponding to the flow setting output substantially independent of actual SG input/output pressures.

Abstract: Apparatus and method for controlling blanket gas flow in an electrical welding facility, wherein welding is performed using a welding electrode in electrical connection with a welding machine unit. The apparatus includes an electric measuring device having a current sensor for determining the magnitude of an electrical welding current carried in a circuit incorporating the welding electrode and having a current sensor output adapted to provide a I signal indicating the current magnitude, and a voltage sensor for determining the magnitude of electrical voltage applied to the welding electrode and having a voltage sensor output for providing a U signal indicating the voltage magnitude, and a control device having inputs connected to the current sensor output and the voltage sensor output, respectively, and a control signal output for providing a control signal to a blanket gas flow controller.

Abstract: The present invention relates to a drilling head for reboring a stuck valve or drilling into the formation downhole. The invention furthermore relates to a drilling tool comprising the drilling head and a driving unit. The drilling head comprises a hole saw beside a drill bit for cutting out a piece from the stuck valve. Furthermore, the invention relates to a drilling system comprising the drilling tool and a driving tool for moving the drilling tool downhole, a method of drilling; and a use of the drilling head.

Abstract: The inventive system and method allows the control of shielding gas in an electric welding apparatus having automatic wire feed by controlling the flow rate of the shielding gas as a function of the wire feeding speed and/or the welding current obtained. A control circuit 112 receives an input signal 203 that is representative for the wire feeding speed and/or the welding current, and issues, in response to the input signal 203, a control signal 206 to a controllable flow control valve 110 in a gas supply line 201, 202, 208, which passes shielding gas from a tank 101, via a regulator valve 102, to a discharge nozzle of the welding apparatus welding gun. An adjusting unit 113 provides an operator with an interface which permits adjustment of the parameters that determine the flow rate function.

Abstract: The inventive system and method allows the control of shielding gas in an electric welding apparatus having automatic wire feed by controlling the flow rate of the shielding gas as a function of the wire feeding speed and/or the welding current obtained. A control circuit 112 receives an input signal 203 that is representative for the wire feeding speed and/or the welding current, and issues, in response to the input signal 203, a control signal 206 to a controllable flow control valve 110 in a gas supply line 201, 202, 208, which passes shielding gas from a tank 101, via a regulator valve 102, to a discharge nozzle of the welding apparatus welding gun. An adjusting unit 113 provides an operator with an interface which permits adjustment of the parameters that determine the flow rate function.

Abstract: Picture frame member comprising a first support flange for an edge portion of a picture and a second flange which encloses a dihedral angle with the first flange to laterally hold the edge portion, the second flange being pivotally connected—adjacent its end turned away from the first flange—a press strip which is movable from an inoperative position outside the dihedral angle towards an operative position within the dihedral angle. The second flange is in the form of a rectangular box, where the outer upstanding wall is extended—in a direction turned away from the first flange—by a flange portion that has its free longitudinal edge connected to the press strip. The press strip is provided with a snap engagement that engages—in the operative press position of the press strip—a complementary snap engagement on the inner side of the flange portion.

Abstract: A clutch actuation system for a magnetic diskette drive includes a two-part mechanism with a door driven pawl, pawl spring and clutch load spring all arranged generally co-planarly with a clutch lever in a limited vertically disposed mechanism compartment; such two-part mechanism being operated upon access door movement to provide combined functions of a door stop, door open return and spring loading of the clutch in its disc drive position.

Abstract: A method is disclosed for accurately registering read-write heads on a magnetic storage medium. It includes the steps of ascertaining fractional departures of track locations from the nominal locations; providing a control for a motor connected to move a read-write head capable of detecting and storing fractional values of the nominal channel spacing; and coupling the control digitally to a stepping motor or servomotor so as to drive the read-write head accurately to the actual position of any selected track. Also, apparatus for practicing the method, various apparatus being disclosed.