Abstract: A device designed to be fitted to or built into a golf club such as a putter to assist in learning the correct club position, in particular for indoor or home putting practice. A transmitter unit is releasably attached to the shaft of the club and comprises a laser diode for transmitting a parallel light beam towards an optical unit having a cylindrical lens above the club iron. The lens diffuses the light along a vertical plane to form a beam directed at the ground in front of the iron, whereby the player is able to see a line of light on the ball and on the ground indicating the direction in which the ball will travel depending on the position of the striking surface of the iron. In one embodiment, the optical system may be supported by an arm attached to the shaft.

Abstract: A method for producing an optical fibre which has been treated with titanium dioxide to improve its corrosion resistance includes stretching an assembly consisting of an outer sleeve having engaged therein a bar which is partially or entirely made of synthetic silica. When treating said fibre, the outside of the coupling sleeve is coated, prior to assembling the components, with a deposit of vitrified synthetic silica containing titanium dioxide.

Abstract: A three phase centrifugal separator for separating the components of a fluid mixture of oil, water and gas, consisting of a cylindrical drum rotatably mounted within a pressure vessel. Two liquid phase holding tanks connected to the pressure vessel are also maintained under pressure. The drum has an initial separation chamber which separates gaseous phase fluids from liquid phase fluids. Water is forced to the outer circumference of the drum by centrifugal force and forms a water zone within the confines of a first and a second annular weirs. The first annular weir is lower than the second annular weir such that water is retained in the water zone until the level of the first annular weir is attached, thereafter any additional water entering the water zone results in a migration of water between the drum and the first annular weir to a water phase outlet. Oil is forced into a water/oil interface on top of the water zone by centrifugal force.