Abstract: An apparatus for electrophoretically separating, visualizing and photographing DNA fragments in agarose gels, the apparatus including an electrophoresis chamber havng a platform and an electrode located on each side of the platform, a transilluminator having a UV light source, a frame defining a viewing opening over said light source, and a UV filtering cover for enclosing said viewing opening, a tray having movable gates for defining an enclosure for the agarose gel in one position and for locating the tray on the platform in the chamber in the other position, and a camera assembly adapted to be mounted on the frame in the transilluminator for providing 1:1 magnification photographs of the DNA fragment migration patterns.

Abstract: A linear transformer switch adaptable for connecting the transformer windings in series-parallel or Delta-Y, the switch including a pair of dielectric plates having a number of sets of fixed contacts mounted in a parallel spaced relation, each contact having flat contact surfaces on each side, a bar mounted between the plates for linear movement, at least one sliding current carrying contact assembly mounted on the bar for each set of fixed contacts, each sliding current carrying contact assembly including a pair of conductive plates of a length sufficient to engage two fixed contacts and a pair of louvered contact sections mounted on each conductive plate, with the sections on one plate opposing the sections on the other plate, and a Geneva drive assembly operatively positioned to move the bar one step in each revolution of the bar and being operable externally of the transformer.

Abstract: A portable band saw assembly adapted to be driven by the rear wheel of a bicycle, the assembly including a base having a frame assembly for supporting a continuous saw blade mounted on a pair of grooved wheels, a wheel guide assembly having wheel rim stabilizing assemblies for supporting the rear wheel of the bicycle and a sprocket hub support including a bracket for camming the rear wheel of the bicycle into engagement with one of the saw blade wheels.

Abstract: A corona discharge device includes a first electrode assembly comprising a roll formed of conductive material and a second electrode assembly including a conductive member having a ceramic element mounted on the conductive member in arranged generally parallel to the rotational axis of the conductive roll. According to a first embodiment, the second electrode assembly comprises a plurality of electrodes mounted for pivotal movement on one of a pair of support rods arranged in a parallel relation to each other and to the roll. First and second groups of electrodes are disposed on each of the respective rods in a staggered relation to each other.

Abstract: A bingo chip retrieving device including a molded cylindrical casing having a bottom wall and an open top, a cover closing the open top of the casing and having a cylindrical guide tube, a plunger mounted for reciprocal motion in the guide tube, a magnet mounted on the end of the plunger in the casing for attracting magnetically attractable chips against the bottom wall, and a spring connecting the guide tube to the plunger for biasing the magnet away from the bottom wall to release the chips from the magnetic force of the magnet.

Abstract: A primary power circuit breaker adapted to be immersed in the dielectric fluid for a transformer, the breaker including an arc interrupting assembly for extinguishing the arc produced on load break; a trip free mechanism responsive to primary, secondary or primary-secondary differential current signals and thermally responsive to fluid temperature, and an externally operable reset assembly for closing the circuit breaker.

Abstract: A molded buswork and method of manufacturing the buswork, including a conductive T-shaped member having openings at the ends, insulated cables having the insulation at the ends of the cables stripped away to expose the ends of the conductors, an individual exposed conductor being crimped in each open end of the conductive member, the conductive member being supported in a cavity mold by the cables, the cavity mold being filled with a thermal-setting silicone rubber, the silicone rubber curing in the mold to encapsulate and bond to the conductive member, the exposed ends of the conductors, and the insulation on each cable.

Abstract: An underoil primary circuit breaker having a fixed contact assembly and a rod contact, a trip-free latch mechanism for moving the rod contact toward and away from the fixed contact, a temperature responsive magnetically controlled trip assembly for releasing the latch mechanism, and cross blast car interrupter for extinguishing the arc produced between the rod contact and fixed contact assembly, the interrupter including a core formed from an arc extinguishing material and defining within a reinforced case a pressure chamber, a pressure relief chamber, an arc passage connected to the pressure chamber and a vent passage connected to the vent chamber; high and low pressure exhaust ports are provided between the arc passage and the vent passage and a throttling tube is provided in the pressure relief chamber to vent gases into the transformer.

Abstract: A rubber bumper mounting strip for an asphalt shingle cutting cylinder including a metal backing strip having a number of mounting sections interconnected by narrow perforated bridges and being offset from the plane of the mounting sections and a rubber bumper molded to the backing strip with the bridges encapsulated in the rubber bumper.

Abstract: A shoe polishing machine including a replaceable buff assembly to enclosingly engage the outer surface of a shoe, mechanism for producing relative vibratory motion between said buff assembly and a shoe positioned in said buff assembly. A button actuated mixing and spraying assembly for spraying polish on the buff assembly and the buff assembly including a polishing cloth for easy and economical replacement. The shoe buffing machine being adaptable for automatic operation on payment of a fee for use in public places including an electrical circuit for the automatic operation.

Abstract: A manually actuable load break switch actuated having a base mounted on one end of a vacuum actuated switch, an operating lever pivotally mounted on the base and operatively connected to open and close the vacuum switch, a toggle mechanism connected to the end of the operating lever, the toggle member including a compression spring for biasing the operating lever to the closed position, a manually actuated handle pivotally mounted on said base for tripping the toggle mechanism by movement from one side of the toggle mechanism to the other, spring means operable connecting the handle to the toggle mechanism, and a lock pin biased into engagement with the end of the lever to lock the lever in the switch open position.

Abstract: A low oil lock-out and/or trip apparatus for a submersible transformer circuit breaker of the type having a manually operated crank shaft assembly for opening and closing the circuit breaker and a fault trip assembly for opening the circuit breaker under fault current conditions, the apparatus including a float assembly which is responsive to changes in oil level in said transformer and a rod carried by said float for blocking the movement of the crankshaft and a trip member for tripping the trip assembly when the oil level drops below a predetermined level in the transformer.

Abstract: A restraining device or "keeper" for locking a truck having an ICC bar to a dock, the device including an arm pivotally secured to the front of the dock for movement between a storage position against the front of the dock and an operative position extending outward from the dock, a restraining bar mounted for vertical movement relative to the swing arm to a position to block the path of motion of the ICC bar away from the dock, and a latch assembly for locking the swing arm in the operative and inoperative positions.

Abstract: A gyratory cone crusher having an eccentric member mounted for rotary motion on a spindle, the eccentric member having a lower skirt surrounding the spindle and an upper cylindrical portion extending upward from the spindle, the eccentric member being supported on the spindle by a V-flat thrust bearing located at the bottom of the skirt and a pair of radial bearings located inside of the skirt, a tapered crusher head is mounted on the eccentric member for gyratory motion within a bowl assembly, the crusher head is supported on the eccentric member by a radial bearing surrounding the cylindrical portion of the eccentric member, a thrust bearing surrounding the skirt, all of the radial bearings being interchangeable and the outside diameter of the thrust bearing being greater than the outside diameter of the V-flat thrust bearing, and a hydropneumatic piston and cylinder assembly for holding the crusher head on the base, the hydropneumatic assembly having a control circuit for selectively relieving the holding

Abstract: A folding assembly for forming a gusset in a file folder hinge and folding the file folder with the gusset inside of the file folder, the assembly including a transporting arrangement for moving a file folder in sequence through a scoring station, a creasing station, a squeezing station and a folding station, the creasing station including a drive assembly for moving one panel of the file folder toward the other as the hinge is creased. The gusset may be heated at the scoring station, creasing station and/or its squeezing station.

Abstract: A prefabricated unit including a wooden frame formed by a number of sections including a pair of jambs, a sill, and a header with a door or window operatively positioned in the frame and a plurality of metal frame extenders mounted on the exterior of each section of the wooden frame, the metal extenders being provided with a nailing fin that can be pivotally moved from a closed position for shipment and storage to an open radially outwardly extending position for attachment of the unit to an opening provided in a building.

Abstract: A sealed message carrier for a message written on a piece of paper, including a container having a top and bottom, a teddy bear sealed in the container, a tubular message holder carried in arms of the teddy bear, an opening in the bottom of the container for inserting the message into the holder and a tape for sealing the opening after the message has been inserted therein.

Abstract: An in-line bullet feeder including a tubular member having a passage forming a path of travel through the member, a first bullet stop assembly formed by three balls positioned at equally spaced positions around the passage, the balls being biased inwardly by a resilient ring and a second bullet stop assembly formed by three balls positioned above the first stop assembly a spaced distance at equally spaced positions around the passage, the balls of the second stop assembly being retained in the passage by a tubular member having a camming surface and a retaining flange for selectively locking the balls in the passage, the first stop assembly being cammed out of the passage by the open end of the shell case as it enters the passage and the second stop assembly preventing upward movement of the bullet to seat the bullet in the casing.

Abstract: A high voltage fuse having a fuse assembly embedded in a granular dielectric material within a cylindrical dielectric housing, the fuse assembly including a number of fuse support surfaces, a support ring at each end of the plates to hold the plates in on equally spaced radial rotation, a conductive plate secured to each of said rings and including a threaded boss, a fuse element helically wound around said support surfaces and being electrically connected to said support plates, an electrically conductive end cap having a threaded stud and being mounted at one end of said housing, whereby the boss on one end of said fuse assembly is connected to said stud.