Abstract: The disclosed trot-line reel is used for reeling and unreeling a trot-line having a multiplicity of leaders secured thereto at spaced intervals therealong, with fish hooks at the ends of the leaders. The reel comprises a cylindrical shaft with a spool mounted thereon and having first and second end flanges. The shaft has first and second end portions projecting from the spool beyond the corresponding end flanges. The first end flange has an edge portion with a multiplicity of slots therein for receiving the leaders of the trot-line. Numerous rubber bands are anchored around the first end portion of the shaft for receiving the hooks of the trot-line with the rubber bands stretched to maintain the leaders under tension to prevent tangling of the leaders and the hooks. A split ring, such as a key ring, may be retained around the end of the shaft to anchor the rubber bands. The split ring makes it easy to add new rubber bands, when needed to replace broken bands.

Abstract: A device for attachment of a resilient and/or flexible tube to a nipple, nozzle or like connection to enable the resilient and/or flexible tube to be retained on the nipple, nozzle or like connection in normal use.In order to provide security for the resilient and/or flexible tube, a retaining element is provided which has an aperture therein of longer diameter than the tube with which it is intended to be used, the diameter of the aperture being large enough to pass over the tube when the tube is in position on the nipple, nozzle or like connection but small enough to cause the resilient and/or flexible tube to grip the nipple, nozzle or like connection.

Abstract: In a fire limiter for automatic firearms with hammer blow detonation, a pawl (38) is supported pivotally directly on a bearing on the hammer arranged eccentrically to the latter's pivoting axis (1). The pawl transfers essentially the entire striking motion of the hammer to a wheel ratchet, which at every shot rotates by one tooth and is held in any given position by a spring-loaded stop pawl. The wheel ratchet is provided with a cam which, after a predetermined number of intermittent stops, activates a fire disconnector which preferably comprises a trip-releasing catch (26), supported pivotally on the trigger (16), and a sear (12), supported pivotally on the same shaft (14) as the trigger (16). The catch (26) initially latches the sear (12) and is pulled away from the sear (12) by the wheel ratchet, whereby the sear is released to drop into a detent (11) on the hammer (2).

Abstract: A blast aerator for fluidizing granular material, comprising a container connected to a supply of compressed air, an aerator valve casing having a diaphragm chamber therein, a flexible resilient diaphragm dividing the chamber into first and second portions, a conduit connected between the container and the first portion, an air blast outlet connected to an outlet port in the first portion, the diaphragm including a valve member initially closing the port by the resilience of the diaphragm, a bleed opening in the diaphragm for pressurizing the second portion when the first portion is pressurized, and a control valve for opening and closing a vent outlet from the second portion, the control valve when closed allowing pressurization of the second portion, and, when open, exhausting the pressure therefrom, whereupon the pressure in the first portion opens the valve member and quickly releases the compressed air from the container to produce an air blast through the outlet.

Abstract: A vacuum control valve comprising a body having a valve surface with a plurality of valve ports extending through the body from such surface, a soft resilient valve member having a control surface slidable along the valve surface and formed with passage means for selectively establishing communication with the valve ports, a movable carriage for receiving and supporting the valve member, and means for moving the carriage along a path substantially parallel with the valve surface, the soft resilient valve member having a soft resilient compressible rear portion formed integrally with such valve member on the opposite side thereof from the control surface, the valve member being confined between the carriage and the valve surface with such soft resilient compressible rear portion in a compressed condition for exerting resilient pressure between the control surface of the valve member and the valve surface of the body, the soft resilient compressible rear portion comprising a pattern of fins alternating with rec

Abstract: A push button switch comprising a noncircular push button, a casing having a noncircular guide opening for the push button, a push button return spring, a carriage member projecting in one lateral direction from the push button and carrying a contactor facing in a transverse lateral direction and selectively engageable with contact means, a contactor spring acting in the transverse lateral direction between the carriage and the contactor and tending to cause twisting rotation of the push button, the noncircular push button and its noncircular opening tending to stabilize the push button against such twisting rotation, and an additional stabilizing member slidably backing up the carriage for taking up the force of the contactor spring and preventing such twisting rotation of the push button. The additional stabilizer member may be a slide rail on the casing or a flange on a second parallel push button, which may have a second carriage slidably backed up by a slide rail on the casing.

Abstract: An encoder for producing multidigit code word signals corresponding to the position and movement of a shaft or some other movable member, comprising a housing, a photocell board or some other signal producing board mounted on the housing and having photocell means or some other signal producing means including a multiplicity of signal channels for supplying a multiplicity of electrical signals indicating the position and movement of the code member, a plurality of circuit boards mounted on the housing in stacked relation to the signal producing board, the circuit boards including means for processing the signals from the signal producing means, and a multiplicity of sockets and pins mounted on the boards and plugged into one another for establishing electrical connections between the successive boards.

Abstract: Precast or poured columns are erected in a plurality of rows. Precast concrete beams are placed on temporary supports between the columns in each row. The beams are slightly shorter than the distance between the columns and are not supported by the columns. Precast concrete floor slabs are placed between the precast beams of adjacent rows, with the ends of the slabs partially overlapping the beams. Temporary forms are placed around the upper portions of the columns and under the end portions of the beams and the adjacent floor slabs. Concrete is then poured to form monolithic concrete members extending over the upper sides of the beams and filling the spaces between the ends of the slabs and also the spaces between the ends of the beams and the ends of the columns for uniting the beams, slabs and columns. After sufficient curing of the poured concrete, the forms and the temporary supports are removed.

Abstract: The invention relates to a horizontal tank-type container, particularly for use in winemaking, the beverage industry and the preparation of alcohol. The upper portion of the container is of a substantially circular cylindrical shape. The invention resides in the container being pear-shaped or escutcheon-shaped in cross section normal to the longitudinal container axis, with the narrow portion pointing downward. This enables the container to be conveniently emptied and easily cleaned.

Abstract: A pressure dressing provided with a cushion for tightly holding an element of grafted skin, wherein the portion opposite the portion in contact with the body (5) has a rigid plate (4).

Abstract: A machine for slitting strips of elongated sheet material from a wider roll of the material in which two spaced mandrels are mounted vertically on a frame and the sheet of material extends from the mandrel past a carriage to the second mandrel. The carriage carries two engaging circular knives mounted on the carriage for rotation about vertical axes, the knives engaging opposite sides of the sheet to cut a strip from the upper edge of the sheet. The carriage is provided with a guide to maintain the selected distance from the upper edge of the sheet to the cutting plane of the circular knives.

Abstract: A method of producing a decorative movement of metal particle display in a pool of molten wax of a burning candle. Portions of a wax crayon containing colored metallic particles different from the color of the candle wax is melted in the flame of the candle and directed to fall into the molten pool for observation.

Abstract: A switch is disclosed having improved contact structure to avoid any detent action between the movable and fixed contact elements, and to afford an enhanced break-before-make action. The switch includes a contactor having a cylindrically curved rider which is slidable across a gap between first and second coplanar contact plates. One plate has a projection or finger, extending across the gap for smoothly carrying the rider across the gap while avoiding any detent action. The other plate has a notch therein opposite the projection for maintaining spacing between the projection and the other plate. The projection and the notch are generally centered relative to the width of the rider. In another aspect, the contactor is movable alternatively into bridging relationship between a second contact plate and first and third contact plates, and the contactor has a pair of cylindrically rounded riders which are slidable along the plates.

Abstract: A unidirectional dynamic microphone provided with a first sound path to the forward side of the diaphragm and a second sound path to the rear side of the diaphragm in which the second sound path has a chamber coupled to a second chamber associated with the diaphragm through a distributed acoustic RC damping assembly.

Abstract: A unidirectional dynamic microphone provided with a first sound path to the forward side of the diaphragm and a second sound path to the rear side of the diaphragm, a Helmholtz resonator disposed in the first sound path having a sound entrance, and a diffraction lens mounted ahead of the Helmholtz resonator and partially shadowing the sound entrance to the Helmholtz resonator for the purpose of increasing the high frequency response of the microphone.