An industrial furnace has at least one furnace chamber and at least two hollow heat-exchange walls each located at and proximal to one lateral side of the furnace chamber so as to exchange heat with the same. At least two regenerators are provided each of which communicates with one of the heat-exchange walls and means is provided for alternately feeding air and flue gas to these regenerators.

An illustrative embodiment of the invention relates to a circuit for a nuclear magnetic logging tool in which two sets of two parallel connected field effect transistors (FET), are coupled to respective gate voltages that are of equal magnitude and of opposite polarity. During polarization, the FETs are in a low impedance condition to avoid being subjected to large voltages. The method of biasing, together with the parallel connection of the FETs ensures symmetrical voltages with respect to grou...

An industrial robot comprising a truck, an arm support base, an arm mounted hereon, a clamp for a load to be carried, a turning device for the arm, and a pump driving the arm and turning device through directional valves, in which a device is provided for detecting a force applied to the arm and a sliding device is provided for sliding the arm support base, whereby the detecting device detects the force over a predetermined value to cause the sliding device to move the arm support base toward th...

The invention is directed to an industrial burner that will operate, without change of parts, with any fuel gas and with a wide turndown range.

The invention relates to an industrial burner of the combustion chamber type that is used for submerged combustion. The burner will operate on gas or oil as a fuel.

An industrial lift vehicle includes a driving portion and a load lifting portion. The load lifting portion includes a ground engaging outrigger which is pivotally connected to the driving portion about a horizontal axis. The load lifting portion includes a vertically extending mast structure mounted on the outrigger for pivotal movement therewith with respect to the driving portion. Means are provided on the driving portion and the mast structure for permitting articulation of the load mast and ...

An industrial roll having inner and outer cylindrical shells held in spaced concentric relationship by one or more intermediate resilient spacer elements. The spacer elements are disposed at an angle relative to a line perpendicular to the rotational axis of the roll, and provide the sole radial support for the outer shell. Axial movement as well as axial expansion and/or contraction of one shell relative to the other may if desired be opposed by spring retainers.

Improved heating tube support means for industrial furnaces having heating tubes extending through the furnace wall.

An industrial truck having a drive portion including wheels being connected to an electric motor being connected to a power source and a trailer portion having wheels. The industrial truck includes a steering system positioned on the drive portion connected to the trailer portion to provide articulated steering of the industrial truck. The industrial truck further including a control device to vary the speed of the motor to vary the speed of the industrial truck.

An industrial robot for movement of an object in space comprising a platform arranged for carrying the object, a first arm arranged for influencing the platform in a first movement and comprising a first actuator and two links, each of which comprises an outer joint arranged in the platform and an inner joint arranged in the first actuator, a second arm arranged for influencing the platform in a second movement and comprising a second actuator and two links, each of which comprises an outer join...