Abstract: A double-ended hexagonal shank tool bit for extracting Phillips head or similar screws with damaged heads. One end of the tool shapes the screw head recess to a flared opening. The other end of the tool is tapered with left-hand screw threads and diametrically opposite longitudinal gashes arranged to enable the tool to engage the sides of the shaped recess and remove the screw.

Abstract: An electrically powered cycle has a frame, an axle, a drive wheel, an electric motor, a motor controller, an electric power supply, a power supply charger, and a swing arm pivotally mounts the electric power supply and electric motor on the cycle frame. The drive wheel is rotatably supported on the axle, which, in turn, is supported in the swing arm adjacent the rear end of the cycle. This end of the swing arm is coupled to the shock absorbers which connect the frame to the axle so that the drive wheel moves relative to the frame. The other end of the swing arm is pivotally mounted on the frame. The electric power supply and the electric motor are supported on the swing arm intermediate the ends thereof.

Abstract: Photopolymerizable compositions using sulfonium salt photoinitiators to effect polymerization of cationically polymerizable monomers as essentially the sole polymerizable material additionally include an organic sulfur compound scavenger to reduce or eliminate the sulfur odor generated upon photodecomposition of the sulfonium salt photoinitiator. The scavengers are simultaneously activated by the electromagnetic radiation to react with the organic sulfur compound concurrently generated and are selected from the group consisting of aromatic ketones, benzoin compounds, aryloin oxime compounds, organic peroxide compounds, and benzil compounds.

Abstract: A polymerizable coating composition comprises 35-80 parts of an epoxy prepolymer material and 20-65 parts of a vinyl chloride dispersion polymer together with 0.5-10 percent by weight, based upon the weight of the epoxy prepolymer material, of an onium salt photoinitiator which decomposes upon exposure to electromagnetic radiation to initiate polymerization of the epoxy prepolymer material. The vinyl chloride polymer has a high molecular weight represented by an inherent viscosity of 0.60-1.60 and a particle size of 0.5-20.0 microns. The coating is applied to the surface of a substrate and then exposed to a source of electromagnetic radiation to decompose the photoinitiator and initiate polymerization of the epoxy prepolymer material to a tack-free surface condition in which the vinyl chloride polymer is dispersed within the epoxy polymer. This is desirably effected by maintaining the coating at a temperature of about 50.degree.-90.degree. C. for a limited time following exposure to radiation.

Abstract: A highly effective photoinitiator for cationic polymerization of monomer formulations is prepared by reacting bis-[4-(diphenylsulfonio)phenyl] sulfide bis-halide wherein halide is chloride or bromide in an aqueous solution with a compound having the formula T MF.sub.6 wherein M is one of phosphorus, antimony or arsenic and T is hydrogen or a metal whose halide salt is water soluble. The two compounds react in the aqueous medium to produce a precipitate which includes at least about 50 percent by weight bis-[4-(diphenylsulfonio)phenyl] sulfide bis-MF.sub.6, and this precipitate may be recovered and dried for utilization without further purification if so desired. Purification may be effected by dissolving the dried product in an organic solvent, cooling the solvent to precipitate the impurities, and thereafter recovering relatively pure bis-[d-(diphenylsulfonio)phenyl] sulfide bis-MF.sub.6 by chilling the solvent solution to form a precipitate, and then separating and drying the precipitate.

Abstract: A highly effective photoinitiator for cationic polymerization of monomer formulations is prepared by reacting diphenyl sulfide with chlorine gas in a Friedel-Crafts reaction in an organic solvent to form bis-[4-(diphenylsulfonio)phenyl] sulfide dichloride. This product is recovered and then reacted in an aqueous solution with a compound having the formula T.MF.sub.6 wherein M is one of phosphorus, antimony or arsenic and T is hydrogen or a metal whose halide salt is water soluble. The two compounds react in the aqueous medium to produce a precipitate which includes at least about 50 percent by weight bis-[4-(diphenylsulfonio) phenyl] sulfide bis-MF.sub.6, and this precipitate may be recovered and dried for utilization without further purification if so desired. Purification may be effected by dissolving the dried product in an organic solvent, cooling the solvent to precipitate the impurities, and thereafter recovering relatively pure bis-[4-(diphenylsulfonio) phenyl] sulfide bis-MF.sub.

Abstract: A method for the high speed coating of various substrates utilizes an epoxy composition containing a radiation-sensitive catalyst precursor which will decompose upon exposure to electromagnetic radiation to provide a Lewis acid effective to induce cationic polymerization of the epoxy composition. The formulation does not require any special epoxy monomeric materials or accelerators and is stable until so exposed. Subsequent to applying the formulation to the substrate, the coating is exposed to electromagnetic radiation and a controlled temperature of 50.degree.-90.degree. C. is maintained in the coating for a limited period of time to effect polymerization of the formulation to a tack free surface condition within a period of less than 30 seconds. Maintenance at the elevated temperature following initiation of irradiation may be for a period of as little as 0.5 second.

Abstract: A highly effective photoinitiator for cationic polymerization of monomer formulations is prepared by reacting diphenyl sulfide with chlorine gas in a Friedel-Crafts reaction in an organic solvent to form bis-[4-(diphenylsulfonio)phenyl] sulfide dichloride. This product is recovered and then reacted in an aqueous solution with a compound having the formula T.MF.sub.6 wherein M is one of phosphorus, antimony or arsenic and T is hydrogen or a metal whose halide salt is water soluble. The two compounds react in the aqueous medium to produce a precipitate which includes at least about 50 percent by weight bis-[4-(diphenylsulfonio) phenyl] sulfide bis-MF.sub.6, and this precipitate may be recovered and dried for utilization without further purification if so desired. Purification may be effected by dissolving the dried product in an organic solvent, cooling the solvent to precipitate the impurities, and thereafter recovering relatively pure bis-[4-(diphenylsulfonio)phenyl] sulfide bis-MF.sub.