Abstract: A method of making a glass product includes: melting a batch of raw materials to form a glass melt in a melting tank; heating the batch and/or the glass melt using two or more electrodes, the electrodes including an electrode material and heating the batch and/or the glass melt includes operating the electrodes at a current frequency of at least 1,000 Hz and at most 5,000 Hz; withdrawing the glass melt from the melting tank; and forming the glass melt into the glass product.

Abstract: The present invention relates to a lighting system for a helmet of the type worn by a user of a vehicle, such as a motorbike, bicycle, moped or scooter. The system comprises an arrangement of a helmet and a vehicle mounted controller unit and transceiver means, the helmet mounting lighting functions comprising including left and right turning indicator lights, a brake light, and down light means and having a helmet mounted controller unit in communication with the lighting functions. The vehicle mounted controller unit is operable to generate lighting function triggering signals, and a transceiver means mounted to the vehicle is provided for transmission of the lighting function triggering signals to helmet mounted transceiver means, such that the helmet mounted controller unit is operable to activate lighting functions of the helmet in response to the lighting function triggering signals received by the helmet mounted transceiver means.

Abstract: A valve assembly includes mutually opposed first and second valves, each having a casing that defines a respective through passage. The through passages include internally circumferential valve seats at contiguous ends thereof, against which respective movable valve members are biased. The respective valve members of the first and second valves engage one another when the first and second valves are brought together to urge the valve members away from their respective seats to open the first and second valves. A coupling member holds the first and second valves together, and a travel limiting element restricts the travel of at least one of the valve members in the direction away from its valve seat to prevent the other valve member from engaging its valve seat when the first and second valves are together, thus preventing the other valve from closing due to the flow of fluid through the valve assembly.

Abstract: A valve assembly comprising mutually opposed first and second valves (10), each of which comprises a casing (12) in which a through passage (14) is defined, the through passages having, at contiguous ends, internally circumferential valve seats (16) against which respective movable valve members (18) are biased, the respective valve members of the first and second valves engaging one another when the first and second valves are brought together to urge the valve members away from their respective seats to open the first and second valves, a coupling member being provided for holding the first and second valves together wherein means are provided for limiting the travel of the valve member of at least one of the first and second valves away from its valve seat to prevent the valve member of the other of the first and second valves from engaging its valve seat when the first and second valves are together, thus preventing said other of the first and second valves from closing due to the flow of fluid through th