Abstract: An example air purification system comprises: an air guiding funnel; a particle absorbing filter disposed at an intake side of the air guiding funnel; a tangential fan disposed at an outlet side of the air guiding funnel; and an ultra-violet (UV) energy absorbing shell mechanically coupled to an discharge side of the tangential fan.

Abstract: A an example replaceable ultraviolet (UV) lamp cartridge includes: a tamper-proof UV energy absorbing shell containing one or more UV radiation emitting devices; an air inlet disposed at a first end of the tamper-proof UV energy absorbing shell; an air outlet disposed at a second end of the tamper-proof UV energy absorbing shell; and a self-aligning connector for receiving external voltage to be supplied to the UV energy emitting devices.

Abstract: A local television antenna system for use with a satellite television system includes an omnidirectional antenna, a support structure for mounting the omnidirectional antenna to a satellite television dish support, and receiving circuitry mounted to the omnidirectional antenna. The omnidirectional antenna includes an antenna plate, having electrical circuit paths formed thereon, and first and second antennas having curled ends. The support structure includes a integrally-molded double clamp for providing a mechanically strong coupling to the satellite television dish support and first and second brackets for mounting to the omnidirectional antenna to provide a mechanically strong coupling. The receiving circuitry is shielded to limit interference and includes filter and amplification circuitry and one or more diplexers for combining a received local television signal with a received satellite television signal.

Abstract: A method and circuit which allows a telephone user having a conversation with a second party in a telephone system having call waiting to effectively respond to an incoming call from a third party without having to engage in conversation with the third party. To accomplish this, the user presses a key on a customer premises equipment (CPE) which initiates a first flash hook operation which places the second party on hold and connects the CPE to the third party. A pre-recorded message corresponding to the pressed key is then transmitted to the third party. The CPE then performs a second flash hook operation which disconnects the third party and removes the second party from the hold state. A plurality of keys, having a corresponding plurality of pre-recorded messages can be provided, thereby allowing the user to respond to the third party with different messages. The CPE can include CIDCW capabilities which enable the user to learn the identity of the third party before selecting the pre-recorded message.