Abstract: A plasma arc welding torch which provides a leak-free method of conveying a plasma arc through a replaceable orifice onto a workpiece. An electrode holding assembly concentrically aligns an electrode with respect to this orifice and an electrode setting tool secures this electrode a specific known distance from a surface of this orifice. Plasma gas and orifice gas travel through passageways in the torch and are discharged out of the torch surrounding the electrically generated arc. A cooling fluid is circulated within a cooling chamber located adjacent to this orifice to reduce the temperature of this torch.
Type:
Grant
Filed:
August 10, 1984
Date of Patent:
December 9, 1986
Assignee:
B & B Precision Machines, Inc.
Inventors:
Will R. Dempsey, Ernest O. Bayless, Samuel D. Clark
Abstract: An ice cream tub cutter in which a tub of ice cream is clamped to a turntable between two posts. Adjustable in height sleeves are mounted on these posts, and a knife is mounted on one of them to make an initial cut, this being through the cover of the tub of ice cream and is accomplished by rotation of the turntable with the knife in engagement with the cover. A wire extends between the sleeves at the same elevation as the knife cut, and an adjustably tensioned spring applies tension to the wire to effect cutting the ice cream as the tub of ice cream is rotated a second time.
Abstract: A system for detecting the position of a light responsive pen with respect to a TV display wherein successive frames of a video recording are encoded by placing a lighted area in a different place on each such successive frame. Then, by determining the frame number of the frame appearing when there is a response from the light pen, the position of the pen is identified and an appropriate system response is initiated and controlled.
Abstract: A tree stand of the general character where two V-shaped edge members support a platform on a tree and in which the platform itself is of truss construction. The top of the platform comprises a carpet and sound deadening and camouflage enabling pads are positionable on the underside of the platform within the truss construction.
Abstract: A drainage system for disbursing water supplied by a drain pipe including an enclosure positionable in water permeable material, its top edge generally flush with terrain, and said enclosure having a generally perforated top, an opening in the bottom and an opening in a side wall. Water received by the enclosure through an opening in the side wall and is generally spread and thereby gradually dispersed around the enclosure and residual water in the enclosure is gradually leaked off through the opening in the bottom.
Abstract: A testing system for testing a selected telephone carrier channel wherein that channel is selectively interrupted at a selected repeater station along its route and bi-directionally looped back for testing. Selection and the looping back process is controlled by a central control unit located at a central telephone exchange and remote control units located at repeater stations. Significantly, the central unit is operated by a dialed telephone call to it, and responsive to additionally dialed digits, it effects the selection of the particular route for the channel in question and a particular repeater station and channel. Actual looping back is effected by a transformer coupling arrangement which additionally provides for the D.C. integrity of the channel.
Abstract: A telephone-telephone line tester wherein a telephone line serving a user is selectively coupled and uncoupled to either or both an audio amplifier or a user's telephone circuit whereby telephone user difficulties may be readily determined as between the telephone line or user's circuit and equipment.
Abstract: A double-walled drinking vessel having a heat maintenance chamber between an inner wall and outer, transparent, wall of the vessel. A fluid is placed between the walls, and this fluid is either heated or cooled, depending upon the beverage that is to be employed in the vessel. An annular base in the form of a skirt is placed around and below the bottom of the vessel, and it has a plurality of spaced orifices which provides for air circulation underneath the vessel, this preventing condensation from occurring on a tabletop or other supporting surface. The state of the temperature maintenance chamber is viewable through the transparent outer wall.