Abstract: Flexible catheters adapted to be inserted into a body to deliver high-voltage, fast (e.g., microsecond, sub-microsecond, nanosecond, picosecond, etc.) electrical energy to target tissue may include a plurality of conductive layers, that may be coaxial. These catheters and method of using them to treat tissue are configured to reduce or avoid arcing.

Abstract: Flexible catheters adapted to be inserted into a body to deliver high-voltage, fast (e.g., microsecond, sub-microsecond, nanosecond, picosecond, etc.) electrical energy to target tissue may include a plurality of conductive layers, that may be coaxial. These catheters and method of using them to treat tissue are configured to reduce or avoid arcing.

Abstract: A method and apparatus for making carbon black. A plasma gas is flowed into a plasma forming region containing at least one, magnetically isolated, plasma torch containing at least one electrode, and forming a plasma. Collecting the plasma formed in a cooled header and flowing the plasma through at least one reaction region to heat the reaction region, and injecting carbon black forming feedstock into the reaction region, resulting in the formation of at least one grade of carbon black. An apparatus for making carbon black is also described including a plasma forming section containing at least one, magnetically isolated plasma torch containing at least one electrode, in fluid flow communication with at least one carbon black forming reactor section, the plasma section and reactor section separated by a plasma formed collection header.

Abstract: An earth crust breaker drawn by a tool bar on a tractor is provided and consists of an elongated U-shaped frame having an angularly upwardly extending front end attached to the bottom of a vertical member of the tool bar. A post extends vertically from each side of the frame to the free end of a horizontal member of the tool bar. A plurality of specifically placed knife blades extend from the bottom of the frame to penetrate the ground and make slices into the crust thereby chopping it up.

Abstract: A game of skill and chance which simulates the excitement and frustrations of drilling for oil. Playing pieces, representing oil drilling rigs are inserted through apertures in a top deck and, if unhindered, proceed through to a lower deck. However, a sliding middle deck is inserted between the other two decks which has only some of the holes so that a drilling rig has a real probability of being blocked and therefore results in a "dry well". Due to the symmetrical nature of the decks, the sliding middle deck may be removed from a specially provided channel, rotated along any plane and then re-inserted. This provides eight different playing configuration from a single sliding deck. Additional decks may be provided for increased variety.

Abstract: A toothed belt drive transmission for pumping units in the oil field which includes a frame and base fitted with a drive pulley on a drive shaft, intermediate and crank shafts, and tandem-mounted belt sprockets with cooperating toothed belts for transmitting power from a drive source to the walking beam of a pumping unit. A conventional drive pulley is carried by a drive shaft rotatably mounted on the pumping unit frame and driven by a motive force by means of one or more V-belts. A drive belt sprocket is also mounted on the drive shaft above and in alignment with an intermediate-to-drive belt sprocket which is mounted on an intermediate shaft, and cooperates in rotation with the drive belt sprocket by means of a first toothed belt. The intermediate shaft is journalled for rotation in the frame and carries an intermediate-to-crank belt sprocket which is aligned with a crank belt sprocket of larger diameter than the intermediate-to-crank belt sprocket, and is rotatably mounted on a third shaft.

Abstract: A grass cutting and trimming blade having a rigid main bar adapted for rotation either in a vertical or horizontal plane, a pair of wire forms for cutting elements removably attached one at one end of said main bar and one at the other end of said main bar, each of said cutting elements adapted for cutting grass upon being rotated by a power source and each cutting element being yieldable in the plane of rotation to prevent breakage thereof when striking an object.

Abstract: An edger attachment for a lawn mower having a means for engaging and disengaging the attachment readily and completely from the mower and wherein the attachment is provided with a blade rotatable by the mower driving means in a normal vertical plane but which may be quickly and easily adjusted for trimming without turning the blade to the conventional horizontal position.