In a laser working apparatus comprising a large power laser oscillator, laser light beam conducting means, and a hand-piece with which the output laser light beam from said conducting means is emanated on desired objectives. The hand-piece comprises a convergence lens for focusing the output light to the desired object and a light detecting means disposed in a casing of the hand-piece, so as to de...

A system for generating a substantially-continuous stream of binary signals representative of the presence of copper on the surface of a fluorescent substrate of a board. A beam is swept by mirror facets of a rotating mirror drum along a path on the board. When the beam strikes copper it is merely relected. When the beam strikes the substrate, a fluorescence is produced. The resultant light is gat...

A robot vehicle for automatic operation in a predetermined travelling route comprises a pair of driving wheels connected to a driving device; means for detecting revolving speeds of said driving wheels; means for detecting azimuth of the travelling direction of said robot vehicle; a memory device for memorizing a travelling program including data of a travelling distance and an azimuth; and a cont...

PURPOSE:To remove mechanical contact portions by providing an exciting means moving in correspondence to the movement of a movable part in the state of being and swiched by a first receiving means and a second receiving means. CONSTITUTION:The pulse form voltage signals e1, e2 obtained by a first receiving means 62 and a second receiving means 63 after t1, t2 while an exciting pulse PE is applied ...

PURPOSE:To control the braking of an unmanned car stably by discriminating whether the advancing direction of the carrier car is forward or backward and setting up slow travelling state, stop state, etc. in accordance with the discriminated result. CONSTITUTION:Receivers 8, 10 fitted to the front and back of the bottom of the carrier car 4 are constituted of receiving coils 8a, 10a and receiving c...

PURPOSE:To improve the positioning accuracy to stop an unmanned carrier car by arranging a metal detector for detecting a metallic label formed in a travelling course and setting up slow travelling state or the like in accordance with the detected result. CONSTITUTION:Receiving coils 11, 12 having the same constitution are fitted to the front and back of the bottom of the carrier car 4 and the met...

A method of manufacturing an insulant having a self reticulating structure for an electrical cable including at least one bare wire (1) obtained from a wire-drawing machine (10), the method comprising: using grafted polyethylene which is finely crushed or which is obtained in powder form; finely crushing gypsum to act as an expansion agent and as a reticulation catalyst; mixing the polyethylene an...

UV-stabilized coated polyester-carbonate articles may be prepared by adding to the coating compositions an effective amount of a benzophenone and/or benzotriazole UV absorber.

Polystyrene beads having antistatic properties are prepared by adding the antistatic compounds to the beads during the pre-expansion step. The beads may then be employed to prepared molded products without any further treatment with antistatic agents.

Epoxy compounds are added to polycarbonate resin to reduce or eliminate the necessity of drying the resin prior to a foaming process.

Methods of making modified polyimide compositions and the resulting compositions. A polyimide forming material is prepared by treating an aromatic dianhydride with an esterifying solvent, then adding a suitable diamine. In order to obtain a foam which is non-friable and resistant to repeated compressive forces, the selected diamine must contain an aliphatic moiety in the chain. This material is dr...

The present invention is a process to form a composition comprising from 5 to 50% by weight and preferably from 10 to 30% by weight polycaprolactam and from 50 to 95% by weight and preferably 70 to 90% by weight poly(hexamethylene adipamide). The process comprises heating the composition to from 440 DEG to 505 DEG F. and preferably 450 DEG to 485 DEG F. The preferred forming process is to form...

A spring brake actuator for a rail vehicle brake unit, comprising a cylinder and a rod shaped member. The actuator includes a cylinder-shaped housing, a piston with a piston rod and a spring intended to act in a brake applying direction. In order to obtain a truly modular system the actuator, as an integrated and self-contained unit, is arranged on the rod-shaped member of the brake unit. Its hous...

A process of preparing shaped products starting from dispersions which contain at least one coagulable, amphoteric high molecular substance by passing the dispersion through an extruder into a coagulation bath which may be provided with electrodes whereby the coagulation is effected by a change in pH such that the isoelectric point of the substance is passed and care is taken that the dispersion c...

Molding compositions for the fabrication of shaped articles having enhanced mechanical properties are comprised of (i) a polymeric matrix, (ii) an inorganic reinforcing filler material therefor, and, advantageously, (iii) a polymer/filler coupling agent, said reinforcing filler material consisting essentially of intimate admixture of enstatite and silica advantageously prepared by calcination of a...

A fast molding foamable composition comprising a terpolymer of ethylene, 10 to 40 percent by weight of a softening monomer and 1.0 to 20 percent by weight carbon monoxide, a free radical crosslinking agent and a chemical blowing agent.

Process for uniformly incorporating pigment into fine powder TFE polymers by premixing pigment and ammonium carbonate or bicarbonate, and then adding the mixture to a TFE polymer aqueous dispersion, followed by coagulating the pigment and TFE polymer.