A particulate coding material, e.g. for identifying the origin of a product by introducing it at source without its presence being readily apparent, comprises particles formed as thin transverse sections of an assembly of elongated elements, e.g. of plastic or natural fibres, of different colors and/or compositions forming a transversely united structure, e.g. having their longitudinal surfaces in adherent contact or contained in a matrix. The assembly can be produced by combining pre-existing f...

A system for identifying a seal stamp comprises a memory having stored therein two impression reference patterns, namely an original reference pattern and a latest reference pattern, for the seal stamp. An impression pattern read by a reader is collated with the latest reference pattern, and when the patterns are found to match, the read impression is verified and the latest reference pattern in the memory is updated with use of the read impression pattern. If the patterns are found not to match...

An identification recording data method for an identification medium includes the steps of printing or laminating an information identification bar code strip and then affixing a magnetic recording strip to the identification medium. A data set is encoded into N encoded data using N algorithms. The bar code strip has the N encoded data recorded thereon. The magnetic recording strip has the data set recorded thereon. The N encoded data is decoded and compared with the data set recorded on the mag...

An apparatus for identifying acceptable coins, including a coin track assembly having a circular coin track loop around which coins can roll, sensor means focused at the center of the circular coin track loop for generating a signal in response to the coin surface pattern as the coin rolls around the circular coin track loop and means for monitoring the signal output from the sensor means to identify acceptable coins.

A doll which can hold any of several objects and which plays a message corresponding to the particular object being held, including a hand with an aperture for receiving posts on the objects, a group of elements with holes aligned with the aperture, a slide for pulling the elements out of alignment with the aperture if they are not held against movement by the post of an object, and a cable extending from the slide to a phonograph in the body to select one of several messages.

A system for identifying two-dimensional patterns. According to this system, a pattern which is to be identified is positioned at a reading location and a Fourier transformation image of the pattern is provided by an optical structure which is distributed along a predetermined optical axis. The Fourier transformation image is picked up by a photosensitive assembly which detects angular and radial components of the Fourier transformation image. These components are electrically converted into cor...

A method is described for determining the presence of an antigen-specific antibody in a vertebrate. Effluvial tissue is exposed to antigens from known sources and is subsequently examined to detect the presence or absence of a conjugate compound formed between a particular antigen and an antibody constituent of the tissue sample. The antigen may be labeled with a fluorescent or radioactive moiety to assist in the detection of conjugate compound formation.

Improved method and apparatus for identifying individual wires of a plurality of wires extending between first and second spaced locations. A plurality of the wires at the first location are connected to individual addressable locations in a matrix. At the second location, signals indicative of individual wire identifications are sequentially applied to the wires with a portable coder and the wires are labeled with their assigned identifications. For each wire to which a signal is applied and ha...

Infiltrators into protected zones are identified by depositing a tacky narrow band fluorescent material, on a perimeter portion of the zone, by illuminating infiltrators of the perimeter with a beam of ultra-violet light and by spectroscopically analyzing a telescopic-received image of the illumination. Most suitably, the fluorescent material is a europium chelate composition, such as europium trifluoracetonate dissolved in acetonitrile and added to an uncatalyzed resin.

A method and apparatus for obtaining improved measurements of shear waves in low-velocity lossy formations surrounding a borehole. The method comprises forming an interface between the borehole wall and a solid homogeneous material having a lower velocity than the formation. The geometry and velocity of the homogeneous material provide enhancement of the shear waves at the interface and thereby minimize the effect of interference from undesired compressional waves. Further improvement is obtaine...