A frameless glassware assembly attaching to boy piercing studs or similar structures attached to the human boy. The apparatus comprises a distribution unit at which video signals are compressed for transmission using intraframe and interframe coding, and at least one intermediate unit disposed in a signal path between the distribution unit and one or more receiving units. The sensor circuit is electrically adjustable from outside the pressure transmitter and the integrated circuit is protected from contaminated atmospheres outside the pressure transmitter. A diffusion burner is disposed upstream of the combustion chamber; and a plurality of premix burners are disposed around the diffusion burner. A cover for the shelf allows the shelf to be used as a solid flat shelf for supporting items from the bottom.