Abstract: A method for manufacturing circuit boards which control digital displays includes a TV camera which images the digital display. The output of the TV camera is fed into a computer which controls a laser trimmer. The laser trimmer trims the resistors on the controlling circuit board until the desired value and characteristics are obtained on the digital display.

Abstract: The dual element time delay fuse includes a circuit overload trigger which opens the fuse in response to long term medium circuit overloads, and a short circuit strip disposed in a solid matrix filler for opening the fuse in response to the presence of a short circuit in the circuit.

Abstract: A locking plier having a pair of opposed, pivotable work-gripping jaws with facing curved portions on each jaw between the tip and the pivot, and transverse work-gripping teeth in the curved portion of each jaw, the face of the teeth in the curved portion of one jaw which faces toward the handle being at an angle of from about 75.degree. to about 85.degree. to the primary form centerline, and the face of the teeth in the curved portion of the other jaw which faces away from the handle being at an angle of from about 75.degree. to about 85.degree. to the primary form centerline, each such tooth having an included angle of from about 45.degree. to about 90.degree..

Abstract: A gapped low voltage bushing (10) comprising a controlled spark gap (1), a metallic arc strap (18), a resistive material (46) and a metallic tank ground pad. Surges entering the transformer on any of the secondary bushings of sufficient magnitude to induce gap sparkover, result in a shunting of otherwise damaging currents safely outside the transformer.

Abstract: A scrap catcher provides a hard work table for the placement of a serger thereon, a resilient pad thereunder to absorb vibration and noise from the serger, and, an aperture for removably receiving a bag to catch and store the serger fabric scrap.

Abstract: There is provided an apparatus for supplying precisely measured lengths of leader ribbon for use in the assembly of printer ribbon cartridges. The apparatus includes a supply of leader ribbon, an accumulator for retaining a length of the ribbon when it is drawn from the ribbon supply and a drive assembly for drawing a measured length into the accumulator. The drive assembly includes a fixed roller and a pivotable roller positioned on opposite sides of the ribbon path for engaging the ribbon therebetween. A stepping motor is provided for rotating the rollers a prescribed number of revolutions and thereby stuffing a measured length of the engaged ribbon into the accumulator. The apparatus also includes a cutter for severing the measured leader length from the supply ribbon.

Abstract: The fuse holder for receiving a cylindrical fuse having conductive ends includes a cap having a fuse carrier disposed in part therein for receiving one end of the fuse and a barrel having a fuse cavity for receiving the cap and fuse. The fuse carrier includes a spring retainer for retaining the fuse within the carrier. The barrel includes a bottom terminal extending through the barrel for contact with one conductive end of the fuse and a side terminal having tines extending through apertures in the side of the barrel for engagement with the fuse carrier which in turn is in electrical contact with the other end of the fuse. The body of the side terminal is disposed on the exterior of the barrel and, in conjunction with the wall of the barrel, isolates the interior of the barrel from the body of the side terminal such that only that portion of the side terminal required to complete the electrical path from the fuse carrier to the side terminal is exposed interior the barrel.

Abstract: A two-stage gapped low voltage surge arrester for dissipating transformer secondary side current surges includes an arc strap in series with a resistive grommet. The combination is mounted on the grounded transformer housing adjacent a line potential bushing such that a first spark gap is formed between the bushing stud and arc strap. The resistive grommet is grounded to the transformer ground pad by metallic fasteners such that a second spark gap is formed in parallel with the resistive grommet. Surges entering the transformer secondary winding of sufficient magnitude induce the first spark gap to flash over, shunting potentially damaging currents outside the transformer through the arc strap and resistive grommet. At even higher currents, the voltage across the resistive grommet exceeds the flash over voltage of the second spark gap and shunts the surge around the resistive grommet.

Abstract: Disclosed is a base bracket able to hold multiple curtain rods or the like which generally requires only two screws to securely mount it to a wall or a solid support. The position of the base bracket is designed to be adjustable over a limited distance after mounting. The preferred base bracket includes multiple screw ports which run lengthwise along the base bracket. The screw slots preferably have a slit extending to the outer side of the bracket, to receive a mounted screw, or have an expanded portion which is large enough so that the head of a mounted screw can pass therethrough. The base bracket also includes a groove, preferably formed by a member extending from the upper surface of the base bracket. The groove can accommodate flanges attached to brackets on the curtain rods in order to hold them in place.

Abstract: A spiral wound sand fuse has a non-reactive fiber core permitting use of the fuse to interrupt high fault currents in high voltage circuits.

Abstract: The high speed fuse employs stamped end bell and terminals rather than forged or machined parts. A slot for the terminal is punched through the end bell. The terminal is inserted into the slot in the end bell and staked in position. This insures a strong tight fit without requiring welding or soldering. One end of each terminal has coined ridges to facilitate automatic welding of the fuse link to the terminals. Round balls are used to seal the fill holes for the arc quenching material. Metal pins secure the end bells within the fuse housing but are not electrically connected to the terminals because of the insulative end bells.

Abstract: A bushing system for high voltage electrical equipment includes a weathershed with integral annular shirts molded around an electrical conductor. The weathershed has a cavity at its base for mating with the opening in the housing for the high voltage electrical equipment. A dielectric gas in the housing communicates with the cavity in the weathershed. A flange and seal are provided at the base of the weathershed for sealingly connecting the bushing system to the housing. A secondary ground may also be provided.

Abstract: A process and apparatus for removing hydrogen sulfide from high pressure gas and recovering liquid sulfur, which includes reacting the H.sub.2 S with sulfite ions and an acetic acid-acid salt buffering system in an aqueous stream whereby liquid sulfur is formed, producing an effluent gas stream containing residual H.sub.2 S and an effluent aqueous stream containing the liquid sulfur, extracting the residual H.sub.2 S from the gaseous effluent stream, and using the extracted H.sub.2 S as well as H.sub.2 S recovered from the effluent aqueous stream as a source of sulfite ions for circulation to the reaction step, and as a source for additional liquid and solid sulfur. Apparatus and methods are also disclosed for recovering solid sulfur from a gaseous stream containing gaseous sulfur by contacting the gaseous stream with sulfur particles in a fluidized bed.

Abstract: A universal tool for maintenance and handling of soldering and de-soldering equipment incorporates a holder for cleaning needles that is inserted into a handle. The holder consists of a number of segments, each of which holds one cleaning needle at any time, that are connected to each other by means of an axis of rotation. The segment that contains the desired cleaning needle at any one time is rotated 180.degree. in relation to the other segments from the holder that has been removed from the handle, at which time the holder is inserted into the handle with the unused cleaning needles facing into the handle. The handle has hexagonal openings at both ends, which are used to screw or unscrew nozzles, suction nozzles, and clamping sleeves. The holder can be inserted into one of these hexagonal openings. The holder can also be fitted with a cap that has a slot through which a selected cleaning needle may pass.

Abstract: A device for ripping fabric includes two blades which act together in a scissor like fashion. A handle is rigidly attached to one of the blades. The movement of the handle back and forth causes a scissor like action between the blades. After the cut has been started, the device may be pushed through the fabric.

Abstract: The invention provides an emergency suspension system for use particularly with drill casings in a wellhead. The system, which is intended to surround the casing, comprises an annular bowl member (6) having an internal tapered annular space (16) which reduces in diameter from its upper to its lower end and a support means comprising an annular support element arrangement (28) at least partially formed from resilient material and a plurality of support members (20,22,24) at least partially embedded in said resilient material and having a circular cross-section in at least one direction, said members forming a plurality of annular arrays adapted to surround said tubular member, the uppermost of said arrays (20) comprising support members having said circular cross-section larger than that of a lowermost (24) of said arrays.

Abstract: A plastic-sandwiched framework structure for constucting a portable folding table. The structure includes upper and lower plastic table top halves and a framework grid sandwiched therebetween. The table top halves are bonded or cemented to one another. The framework grid is preferably made of wood, and includes joists or beam members interconnected by cross members. The framework grid is received in a correlatively shaped shell integrally formed in the lower half of the table top. Folding legs are mounted on the underside of the table top and connected through the lower table top half to the cross members. The lower table top half is provided with gussets at selected locations between relatively high vertical walls and the adjacent horizontal planar surfaces. Substantially all other interfaces between vertical and horizontal surfaces on the exterior of the lower table top half are provided with a radius. Stiffening ribs, which may be extensions of the shell, are also disposed on the lower table top half.

Abstract: A high speed fuse 8 having terminals 14 staked to non-electrically conductive end bells 12 with fusible element 30 connected to ridges 44 on terminal 14 by projection welding, and round balls 18 plugging sand holes 20.

Abstract: A high speed fuse 8 having elements 14 staked to non-electrically conductive end balls 12 with fusible element 30 connected to ridges 44 on terminal 14 by projection welding, and round balls 18 plugging sand holes 20.