Abstract: An advanced multi-channel synchro-to-digital converting device for deliveg synchro data to a data bus, includes a digital-to-synchro synthesizer for generating synthesized analog synchro test signals, and switching for selectively substituting the synthesized synchro signals for synchro signals, with the selection of conversion channels and the magnitudes of the synthesized analog synchro signals both under the control of data on the data bus.

Abstract: In a poultry watering system having a float-controlled valve for maintaining a desired water level in a trough, leakage through the valve from an overhead supply line, which may occur when the water supply is cut off is effectively prevented without reducing sensitivity of the float by the provision of spring means located within the interior of a valve housing and acting on the end of the float stem.

Abstract: Improved clarity in treated wastewater is achieved by adding a flocculating agent following screening by fine mesh screening means, preferably a centrifugal screen separator. The effectiveness of the separator is improved, in turn, by preceding it in the direction of liquid flow by a corrugated plate interceptor to remove greases and oils. Preferably, fine mesh screening is carried out by two separate screening devices, one being a high liquid volume centrifugal screen strainer, and the other being a mechanically self-cleaned low liquid volume device. Wastewater is delivered to a thickener, preferably a corrugated plate separator, the thickened product being delivered to the low liquid volume device, and the supernatant being delivered to the centrifugal screen strainer. The corrugated plate interceptor not only acts as a thickener, but also eliminates grease and oil, which would interfere with the operation of the centrifugal screen strainer.

Abstract: A free-standing shelf support of prefabricated components particularly suited for convenient store or supermarket displays is disclosed. The unit includes two sections each comprising a pair of vertically-disposed uprights mounting therebetween a panel assembly having grooved vertical edges with clips at their upper ends designed to cooperate with slotted tongue protrusions on the uprights to cause the panel assembly to be secured to the uprights simply by being slid downwardly into engagement therewith during assembly. Each upright has a base member which extends laterally from its lower end, and a lower shelf spans across the top of the base members and cooperates with a kickplate extending across the ends of the base members to tie together the lower end of the unit. The uprights are provided with a series of vertically-spaced holes designed to accommodate vertically adjustable shelf supports.

Abstract: In a gravity-feed shelf having an endless flexible conveyor belt supporting a plurality of articles arranged in a column and automatically feeding the articles in said column forward in a columnwise direction when the foremost article in the column is removed, one or more frictional pads are located at a position underneath said conveyor belt and are responsive to the presence of an article on said belt and above said position, for stopping the movement of said belt.

Abstract: Simplified molding of a disposable plastic mousetrap is achieved by providing an elongated box and a triggerable closure hinged to the box along a hinge axis parallel to the direction of elongation. Shield means prevent access to the trigger from the exterior of the box, thereby requiring the mouse to enter the box before reaching the trigger.

Abstract: In a gravity-feed shelf having an endless flexible conveyor belt supporting a plurality of articles arranged in a column and automatically feeding the articles in said column forward in a columnwise direction when the foremost article in the column is removed, brake means are located at a position underneath said conveyor belt and responsive to the presence of an article on said belt and above said position, for stopping the movement of said belt.

Abstract: A foraminous sheet having properties similar to those of a sheet formed by perforation is made by arranging filaments in overlying groups to produce a non-woven mesh, and applying pressure to the overlying groups so that the intersections of the filaments are flattened to an extent such that the sheet which is produced has a substantially uniform thickness except at the locations of its openings and in the immediate vicinity thereof. The filaments of the mesh are fused together at their intersections in the pressure application step. Fusion of the filaments as well as flattening are aided by the application of heat.

Abstract: The expenditure of energy required to feed solid material into a jet mill or flash dryer is significantly reduced by the use of a novel feed system in which a blower, operating at a pressure slightly higher than the pressure within the jet mill or flash dryer, produces a stream of air which transports the solid material to be treated. Solid material is introduced into the stream of air through a rotary valve in which the rotary element is disposed for rotation about an axis parallel to the direction of air flow and its blades move through the path of air flow to prevent the accumulation of material on the blades.

Abstract: A folding cart comprising a fabric body and a collapsible tubular frame comprises tubular members extending longitudinally underneath the bottom of the fabric body for supporting the load and preventing the formation of pockets which impede unloading. Wheels are located behind and underneath the body, and are prevented from coming into contact with the body by protective fenders which also serve as collapsible braces for locking the frame elements in the open condition. The front edge of the bottom of the body is protected by a clamping member. The tubular members underneath the body are arranged substantially in an inclined plane in order to insure that the front edge of the body is able to come into contact with the ground despite irregularities therein.

Abstract: In a closed-loop flash dryer, hot gas is introduced through a horizontal or downwardly directed nozzle. This configuration is especially adapted for drying heat-sensitive materials. The use of a single nozzle eliminates damage to equipment which results from differential expansion.

Abstract: An improved electrode assembly for use in electrolytic flotation for wastewater treatment comprises a series of overlying layers of foraminous mesh arranged in substantially horizontal planes, wherein electrically conductive mesh layers constituting the anode and cathode are maintained in closely spaced relationship with each other, but are prevented from coming into direct contact with each other by one or more insulating mesh layers.

Abstract: In a shelving system having both vertical and oblique supports for removable shelves, identical shelves are interchangeably usable on either support by virtue of special tabs which are engageable with support slots in two possible ways. The same shelf, therefore, can be mounted horizontally on either the vertical or the oblique supports.

Abstract: In a sheet metal shelving system, shelf clips for retaining shelves on support posts are provided with hooks for engaging openings in the support posts and also with projections which enter openings and prevent removal of the clips from the posts. The projection is held in place in its opening by reason of the engagement of a shelf apron in the retaining portion of the clip. The apron is held in the retaining portion of the clip by a snap-fit relationship between a rolled lower edge of the apron and one or more projections formed in the retaining portion of the clip.

Abstract: Significant improvement in the sharpness with which particles are classified by size in a recirculating jet mill is achieved by the provision of an elongated, flexible barrier strip located adjacent the outermost part of the wall of the classifier section. The positions of both ends of the strip are adjustable for controlling classification. The cross-section of the classifier section is pear-shaped, the narrow portion of the cross-section being toward the outside of the classifier section, and the barrier strip being within said narrow portion. An auxiliary outlet for large particles can be provided behind the barrier strip.

Abstract: A harness of nylon webbing or similar material consists of a belt having a ring at one end and a snap hook at the other end, a short length of webbing is secured to the belt at an intermediate portion thereof offset toward the end having the ring. A second ring is provided at the end of this short length of webbing for attachment of the belt to a rope either directly or through a snap link. Straps are permanently secured to the belt immediately on either side of the short length of webbing. These straps have snap hooks at their opposite ends. A third ring is connected through a second short length of webbing to an intermediate location on the belt part way between the snap hook at the end of the belt and the locations at which the straps and the first short length of webbing are attached to the belt. This harness may be worn with the belt around the waist and with the straps used as leg straps. Worn this way, it is useful for rappelling, climbing, sliding, and for some rescue purposes.

Abstract: A support for use in conjunction with self-coiling indicia-carrying sheets in a movable indicia display utilizes two identical backing members, and two identical end members, a total of only four parts. Sheet metal is used, and roll retainers are integrally formed on the backing members, as are intermediate edge guides for the indicia-carrying sheets. The end members serve as edge guides, and also provide support for the ends of the roll retainers. The entire assembly is fastener-free, cooperating tabs and slots being used to secure the parts together. In a modified version, each end member is permanently secured to one of the backing members so that the support comprises only two separable parts, which are identical to each other. In another modification, adapted to be viewed from only one side, only one backing member is used.