Abstract: An automotive tire pressure monitor with diversity antenna system employs a RF transmitter within each wheel/tire assembly and a vehicle mounted receiver with multiple receiving antennas. A first, primary antenna is located adjacent one vehicle window and a secondary antenna is located adjacent another vehicle window opposite the primary antenna. Both antennas are coupled to a receiver via a switch. The receiver feeds a processor, which is encoded to select the optimal antenna/receiver configuration based upon absolute signal strength (signal to noise), signal quality (completeness of encoded data) or signal reception rate. The signal received from the optimized antenna/receiver configuration is processed and transmitted to the host vehicle for system intervention and or display to an operator.

Abstract: An antenna disposed on glass including first and second spatially separated grid portions is disclosed. The first grid portion is electromagnetically coupled to the second grid portion to provide reception of AM and FM signals.

Abstract: An integrated patch antenna is disclosed. The integrated patch antenna receives at least a first and second band of signals. The integrated patch antenna includes a bottom metallization and first and second upper metallizations disposed about a dielectric material to receive the first and second signal bands. The first and second signal bands may be, for example, a satellite digital audio radio systems (SDARS) band and a global positioning system (GPS) band.

Abstract: An antenna system for a vehicle including a rear windshield is disclosed. The antenna system comprises a global positioning system (GPS) antenna unit including a radiating element electromagnetically coupled to an excitation element about the rear windshield glass.

Abstract: An antenna including a first FM portion and first and second AM portions. The first AM portion at least partially circumscribes the first FM portion and the second AM portion at least partially circumscribes the first AM portion and at least partially circumscribes the first FM portion.

Abstract: An emergency ventilation system for elevator cabs includes a low voltage power source defined by the secondary winding of a stepdown transformer having its primary winding connected across a primary power source. An emergency power circuit has a single pole, double throw relay located in a normal power position when the primary power source is "on" wherein it connects the low voltage power source to the ventilating fans. The single pole, double throw relay has an emergency position wherein it is positioned to connect the emergency battery source to the ventilating fans so as to operate them independently of the primary power source for providing uninterrupted ventilation to the elevator cab.

Abstract: An emergency ventilation system for elevator cabs includes a low voltage power source defined by the secondary winding of a stepdown transformer having its primary winding connected across a primary power source. An emergency power circuit has a single pole, double throw relay located in a normal power position when the primary power source is "on" wherein it connects the low voltage power source to the ventilating fans. The single pole, double throw relay has an emergency position wherein it is positioned to connect the emergency battery source to the ventilating fans so as to operate them independently of the primary power source for providing uninterrupted ventilation to the elevator cab.