A pattern matching apparatus for comparing an input pattern of features with a reference pattern. Address information is stored in the reference pattern along with features, so that branching in a work memory which stores cumulative distances between the input and reference patterns may be effected. In this manner, memory requirements for storing reference patterns are reduced, and the number of required distance calculations also is reduced.

A drum-like stem body structure which has a base and which is arranged for indexed rotation has placed thereon a group of separable holding bars, circumferentially around the outside of the drum, the holding bars themselves being formed with Jacquard control pins or projections of similar nature to control the camming elements for movement of the control butts of Jacquard selectors; the bars may also hold Jacquard programming jacks with selectively placed butts. The bars may be made of plastic, ...

Vertically reciprocatory printing elements each have an interior space for printing medium. Each element is first charged with printing medium during its reciprocation and the printing medium is then forcibly expelled from the printing element as the same reaches its printing position.

A method of forming a buttonhole pattern including two spaced-apart rows of zig zag stitches so that each row is formed in a like manner includes sewing a row of narrow zig zag cording stitches in a first direction and subsequently covering the cording stitches with one of the parallel rows of zig zag stitches formed in a second direction and repeating these steps for the second of the parallel rows.

A speed pattern generator for use with manually operated construction elevator car controls. Leveling and running patterns, as well as linear acceleration and deceleration patterns are provided by a pair of operational amplifiers connected to provide integrating and amplifying functions.

The invention relates to optical systems intended for the transfer of patterns onto a photosensitive surface. The system according to the invention comprises a source of coherent radiation which is intended to illuminate the photosensitive surface for a predetermined duration and which is associated with transmission means introducing a wavefront modulation of the radiation intended to average during the exposure time, the interference fringes produced by the coherence of the radiation.

A system in which a plurality of members or guides are applied in sequence and utilized in combination for aiding in the selection and/or modification of the paper patterns used for making garments. The system includes shoulder seam defining members, a back pattern size indicating member, and shoulder slope indicating members, all of which are used to establish those dimensions and relationships found to be critical in such selection and/or modification of garment patterns.

The drag pattern for a standard AAR coupler is modified to increase the thickness of the bottom wall of a coupler casting forwardly and rearwardly of a plane containing the horn line. The increased thickness is achieved by forming a substantially planar bottom wall surface for a distance of at least two inches at either side of a plane containing the horn line. Head and shank pattern parts are interchangeable and releasably secured onto a pattern plate for molding foundry sand in the drag portio...

An apparatus for impressing relief patterns of high resolution, particularly phased holograms or phased diffraction gratings, in a thermoplastic information carrier, comprises a heatable impressing matrix in strip form, which carries the relief pattern and which, together with the information carrier, is passed between two calender rollers, the impressing matrix being adapted to be heated by a current flowing through it.

A three input device which accepts signals from a two port antenna system having opposing cardioid patterns, and a third input for a figure eight pattern that is at right angles to the first cardioids. The first antennas cardioids are combined by a zero-phase hybrid combiner into an omnidirectional pattern. This omnidirectional pattern is combined in a second hybrid combiner with the figure eight pattern so that the sum and difference patterns are present at the outputs. These signals are fed to...