Abstract: A display apparatus within elevator cabs or elevator waiting areas that facilitates the simultaneous display of advertising and general news information is described. Broadcast from a remote control center, advertising and general news information updates are transmitted to, and stored in, a display memory and subsequently displayed on a screen according to a remotely modifiable program schedule. The display is updated such that it contains a copy of the latest broadcast schedule, as well as the advertisement and information programming, and automatically displays a days program according to the most current broadcast schedule. The display units are each individually addressable thus allowing groups of displays to be simultaneously updated from a remote centralized location with information such as news updates and the like.

Abstract: The present invention provides a system and method for visualizing internal images of an anatomical body. Internal images of the body are acquired by an ultrasound imaging transducer. The position and orientation of the ultrasound imaging transducer is tracked in a frame of reference by a spatial determinator. The position of the images in the frame of reference is determined by calibrating the ultrasound imaging transducer to produce a vector position of the images with respect to a fixed point on the transducer. This vector position can then be added to the position and orientation of the fixed point of the transducer in the frame of reference determined by the spatial determinator. The position and orientation of a medical instrument used on the patient are also tracked in the frame of reference by spatial determinators. The position and orientation of the instrument is mapped onto the position and orientation of the images.

Abstract: The start-up circuit comprises a large valued resistor and a storage capacitor. A voltage sensing switch is connected to the junction of the resistor and storage capacitor on one hand and a voltage doubler on another. The voltage doubler is fed through a capacitor driven by a pair of switching elements arranged in a bridge configuration. The switching elements are driven by a control circuit which is supplied by the start-up and run circuitry. The output of the bridge feeds a resonant tank which is parallel loaded through the resonant capacitor by means of a transformer.