This invention relates to a tool for the positioning of vinyl corner posts or moldings during the application of siding to the exterior of a building. The patent discloses an L-shaped body member having an aperture formed in its interior edge. A vinyl corner post is pushed into the aperture where it fits snugly. The assembly is then pressed against the corner of the building and the flat interior edges of the legs of the body member are pressed against the sides of the building to align the corner post to the building.

Adobe PDF: 5720114.pdf - 473 KB / 9 pages

United States Patent No. 5,186,526

This invention relates to a crawler pad for use in a mining machine. In the mining field it is necessary to have machines capable of transporting materials within a mine tunnel. The machines generally comprise a large bin mounted on a transport means which consists of a number of crawler pads connected to a drive chain. The patent discloses a one-piece crawler pad which extends outwardly on both sides of the drive chain. A one-piece crawler pad requires only one pin connection to the drive chain, which reduces the stress on the pad and pin attachment. A one-piece crawler pad is less likely to break, resulting in savings in repair and machine downtime.

Adobe PDF: 5186526.pdf - 376 KB / 8 pages

United States Patent No. 5,173,799

This invention relates to a wavelength conversion device in which a laser beam is applied to a nonlinear optical medium so as to obtain a beam of a different wavelength. The change in wavelength is achieved by causing the beam to have a conical wavefront and applying it to a nonlinear crystal so that the beam converges along the center axis producing an output beam of a different wavelength. The conical wavefront is achieved by the use of lenses, mirrors and crystals with conical surfaces.

Adobe PDF: 5173799.pdf - 1.1 MB / 16 pages

United States Patent No. 5,123,709

This invention relates to a hydraulic device which is used to align the roadway on which a flexible continuous tram mining machine travels following movement of the machine after a drilling cycle. The device includes an upper portion, supported by wheels which allow the device to ride along the length of the roadway, to which two side portions are attached. Each of the side portions supports an extendable hydraulic cylinder which pushes against the rib of a mine tunnel to force the roadway back to center.

Adobe PDF: 5123709.pdf - 231 KB / 5 pages

United States Patent No. 4,958,356

This invention relates to an excimer laser appapratus that uses rare gases and hydrogen chloride gas as a laser media for the emission of ultraviolet light. The patent discloses connecting a hydrogen chloride generator (HCl generator) as part of a recirculation loop for the laser gas. The HCl generator generates hydrogen chloride from the reactions between H₂ in the laser gas and a solid or molten metallic chloride. The hydrogen chloride is generated in an amount corresponding to the concentration of hydrogen in the laser gas. When the amount of hydrogen chloride is reduced by reacting with the construction materials of the laser apparatus hydrogen gas is liberated. The hydrogen gas is separated from impuraties in a cold trap and then again reacts with the metallic chlorides to generate additional hydrogen chloride. With this arrangement, an approximately constant hydrogen chloride concentration is maintained in the laser gas until the chlorine in the metallic chlorides is consumed. The safety of the excimer laser apparatus is also greatly improved because highly reactive hydrogen chloride gas is no longer stored or supplied outside of the system.

Adobe PDF: 4958356.pdf - 414 KB / 6 pages

United States Patent No. 4,817,706

This invention relates to a magnetic field coil which uses liquid cooling. The magnetic field coil is designed for providing a uniform magnetic field suitable for use in the image pick-up apparatus used in nuclear magnetic resonance computer-aided tomography. The patent discloses using a preheating apparatus to heat the cooling liquid when the coil is not being excited to keep the cooling liquid at essentially the same temperature it has while the coil is being excited. The temperature of the entire coil is maintained at the desired operating temperature without the influence of the ambient temperature by using the low thermal resistance between the coil and its cooling plates. This prevents any vertical temperature difference in the coil, i.e., temperature deviation, thereby decreasing the waiting time until the tomographic image is stabilized.

Adobe PDF: 4817706.pdf - 517 KB / 6 pages