Abstract: A hand-launched flying toy formed of three or more equally spaced and substantially coplanar blades or vanes radiating out from a central hub area. The blades are shaped to have minimum air drag and substantially zero aerodynamic lift. When launched the device climbs in a substantially vertical loop, spinning as it goes. At or near the top of the loop, the device (which has become inverted) loses its linear velocity, thereby causing the device to descend spinning to a substantially vertical, relatively soft landing near the user.

Abstract: The invention relates to a system for the reception, storage and subsequent ransmission of information. The system utilizes a main memory and an auxiliary memory. The information received by the auxiliary memory updates and corrects the information in the main memory. A timing generator controls the timing of the memory scan periods and a time normalizer is utilized to correct frequency deviations of the timing generator. A detector monitors the operation of the system.

Abstract: The invention relates to a device which holds a coin within a moving magnetic field and provides a means for determining the metallic content of the coin based upon the resultant eddy current losses generated in the coin. The moving magnetic field is provided by one or more pairs of magnets mounted in a wheel such that the coin can be inserted into a gap in the wheel through which the magnetic field lines pass. The wheel is accelerated rotationally to a speed higher than some first reference speed, then a precise measurement is made of the time required for the wheel to decelerate from the first reference speed to a second (lower) reference speed.

Abstract: The invention relates to an adjustable attachment for metal-working lathes and the like, and the error adjusting method made possible thereby for eliminating runout and axial errors in a manner that makes one adjustment independent of the other. The proposed attachment device basically comprises: a first portion which attaches to the headstock spindle of the lathe; a second portion which holds the chuck; and a third portion disposed intermediate the first and second portions, with all three portions being braced together but free to be moved relative to one another in a sideways or radial direction during error adjustment.