Abstract: Apparatus for use by a broker including a memory for holding a number of market prices each corresponding to a security or a commodity. A speech synthesizer provides that prices may be quoted to customers in a synthesized human voice. A telephone interface connects outside calls to a DTMF transceiver which is in turn connected to a programmed microprocessor unit so that a caller may key in instructions or information. Instructions for price quotations result in the price for the selected security or commodity being reported to the caller in a synthesized human voice. The apparatus is also capable of monitoring price triggers and reporting violations of price triggers by calling a predetermined telephone number and reporting the violation in a synthesized human voice. Also, price requests are logged and the unit is responsive to an instruction keyed in by a broker through his telephone to report the contents of the log over the telephone in a synthesized human voice.

Abstract: A gated strip proportional detector includes a gas tight chamber which encloses a solid ground plane, a wire anode plane, a wire gating plane, and a multiconductor cathode plane. The anode plane amplifies the amount of charge deposited in the chamber by a factor of up to 10.sup.6. The gating plane allows only charge within a narrow strip to reach the cathode. The cathode plane collects the charge allowed to pass through the gating plane on a set of conductors perpendicular to the open-gated region. By scanning the open-gated region across the chamber and reading out the charge collected on the cathode conductors after a suitable integration time for each location of the gate, a two-dimensional image of the intensity of the ionizing radiation incident on the detector can be made.

Abstract: A radiation imaging device which has application in x-ray imaging. The device can be utilized in CAT scanners and other devices which require high sensitivity and low x-ray fluxes. The device utilizes cumulative multiplication of charge carriers on the anode plane and the collection of positive ion charges to image the radiation intensity on the cathode plane. Parallel and orthogonal cathode wire arrays are disclosed as well as a two-dimensional grid pattern for collecting the positive ions on the cathode.