Abstract: An assembly for a radio frequency filter includes: an elongate pedestal with an upper surface; a resonator; a tuning member that is positioned above the resonator; and a screw that mounts the resonator to the upper surface of the pedestal, the screw including a shank with a thread and a head, the head including a plurality of recesses configured to receive a tool, the recesses extending through the head.

Abstract: An assembly for a radio frequency filter includes: an elongate pedestal with an upper surface; a resonator; a tuning member that is positioned above the resonator; and a screw that mounts the resonator to the upper surface of the pedestal, the screw including a shank with a thread and a head, the head including a plurality of recesses configured to receive a tool, the recesses extending through the head.

Abstract: A resonant cavity filter includes a filter housing defining an internal cavity therein, a resonating element in the internal cavity of the filter housing, and a coupling transmission line extending adjacent a periphery of the resonating element in the internal cavity of the filter housing. The resonating element is rotatable relative to the coupling transmission line to vary an electromagnetic coupling therebetween. Related devices and methods of operation are also discussed.

Abstract: A method and a plant are provided for calibrating surfaces of stone materials, suitable for working at least one slab (1) composed of an entry side and an exit side and of two parallel side edges; the slab (1) is pushed along the side edges through a conveyor belt and is subjected to the cutting action imparted by multiple tools equipped with a peripheral speed compatible with optimum cutting parameters for the stone material; the tools move along a predefined path along the surface of the slab (1), and the motion imparted by the conveyor belt and the predefined tool path is combined in order to completely cover the surface of the slab (1); the contact between the slab (1) and the tools is ensured simultaneously at least in one point on each of the two side edges of the slab (1).

Abstract: A method and a plant are provided for calibrating surfaces of stone materials, suitable for working at least one slab (1) composed of an entry side and an exit side and of two parallel side edges; the slab (1) is pushed along the side edges through a conveyor belt and is subjected to the cutting action imparted by multiple tools equipped with a peripheral speed compatible with optimum cutting parameters for the stone material; the tools move along a predefined path along the surface of the slab (1), and the motion imparted by the conveyor belt and the predefined tool path is combined in order to completely cover the surface of the slab (1); the contact between the slab (1) and the tools is ensured simultaneously at least in one point on each of the two side edges of the slab (1).

Abstract: A composition is described, for filling the pores existing in the surfaces of coatings used in architecture, both for exteriors and for interiors, whose function is protecting the above surfaces against stains, comprising: sodium silicate to form a film; natural or synthetic mineral nano-charges to reduce, when drying, the shrinkage of a material deposited inside the pores; glycerine to slow-down drying; water as solvent; surface-active material to make it easier to wet the surface pores; dispersant to stabilise the nano-particles and to avoid their agglomeration and following sedimentation.