Abstract: Compositions suitable for producing mineral fibre reinforced thermoplastic composite materials by the wet-laid process comprise mineral fibres, matrix polymer and a coupling agent. The fibres are silanized with reactive silane groups capable of reacting with the coupling agent, for example a maleic anhydride grafted polyolefin, to improve adhesion between the fibres and matrix polymer in the final composite product. The composition excludes components which hinder the reaction between the silane groups and the coupling agent.

Abstract: A system for obtaining real time measurements of at least one variable, such as temperature, of a molten metal bath where the variable is measured by immersion of an expendable primary element. The system includes a data transmitting assembly which receives the output of the primary element and when that output is within a predetermined range, indicating a valid reading, transmits a digital radio signal indicative of the magnitude of the variable. A data receiving assembly operates to receive the transmitted radio signal and a display device responsive to the output of the receiving device displays the magnitude of the variable.

Abstract: A Doppler velocimeter for measuring the doppler frequency shift of light scattered from particles suspended in a medium. The velocimeter includes a light source and an integrated optical waveguide having a first optical waveguide path for receiving an incident beam of light from the light source at one end. The first waveguide path further guides the incident beam to a second end which is located in the medium adjacent the particles. A second optical waveguide path is optically coupled to the first waveguide path for receiving the scattered light from the particles as well as the non-scattered light and guiding both to the other end thereof. A detector receives the scattered and non-scattered light from the second waveguide and converts it to an electrical signal indicative of the doppler frequency shift.

Abstract: In an electronic horn for alarm systems of the type in which an alarm condition is indicated by a reversal of polarity in the d.c. power supply, an improvement provides a pair of terminals for connection to said d.c.

Abstract: A process for manufacturing a bicycle chain drive which utilizes a crank which is cold formed as a single piece with integral splines for engaging a sprocket wheel when the sprocket wheel is mounted in driving relationship with the crank. A cold forming process which can be used for producing the crank includes several stages of upsetting to form the journals, the splined sprocket flange, and an adjoining collar for aligning the sprocket. After those elements have been formed the pedal receiving ends are formed by another upsetting process after which they are drilled and tapped. Then the arms are bent to form the finished crank which is assembled to the sprocket.