Abstract: In a self-stringing yarn texturing air jet which is compact and easy to string up includes a body, a yarn inlet section, a movable venturi and a yarn guiding element through which yarn passes to the outlet end of the jet, a second flange on the yarn guiding element located upstream of a flange with an orifice improves texturing efficiency of the jet.

Abstract: A drug delivery system is provided which is in the form of hydrogel beads employed in a new interpenetrating polymer network which is formed by swelling hydrogel beads with an acrylic swelling agent and reacting the swelling agent with a cross-linking agent. The drug delivery system has superior drug loading capacity and controlled release characteristics.

Abstract: A method and kit for the optical detection of proteins and nucleic acids in a matrix, such as polyacrylamide electrophoresis gels. The method comprises fixing the proteins and nucleic acids in the matrix using aromatic sulfonic acids having tertiary amines capable of forming coordination complexes with silver ion.

Abstract: An arrangement for withdrawing supernatant from a deposition surface is provided for use with a cytocentrifuge chamber block. The block receives an absorbent plug in a recess provided therein. The plug is restrained from movement past a predetermined point until a predetermined insertion force corresponding to a predetermined rotor speed is imposed on the plug. At that time a resilient restraining arrangement deflects to permit the plug to advance with respect to the block. The restraining arrangement preferably takes the form of tines resiliently mounted to the plug.

Abstract: A protective-hood fastening for portable angled grinders is disclosed. The protective hood is attached by a tensioning strap and screw to, and can be released from, a spindle collar on the gear housing. A securing element prevents the hood from slipping off the housing and into the grinding disk.

Abstract: A liquid pipetting system for aspirating and dispensing small samples of fluid and diluents. The pipetting system consists of a coaxial needle serving as the pipette tip and a metering system to control the fluids. Precise dispensing of small amounts of liquid from the inner needle is made possible by surrounding the sample liquid with a miscible diluting liquid thereby establishing a controlled interface and conveying the sample liquid into the receiving chamber with that miscible diluting liquid.

Abstract: A digital programmable packet switch synchronizer receives a digital input data stream which includes a unique digital word. The unique digital word is stored in the synchronizer in a random access memory. A group of the most recently received data bits are stored in memory along with a blanker bit for each data bit. The blanker bit determines the valid or invalid status of the data bit. During each bit period of the incoming data stream, the stored data bits are serially compared with the stored unique word. A count is made of the number of noncomparisons between the stored data bits and the stored unique word bits when the data bit is valid. If the number of noncomparisons does not exceed a programmed error limit, an output signal is generated to indicate detection of the unique word. A similar count is carried out for detection of the inverse to the unique word.

Abstract: An ironing board supported by collapsible legs to which a box-shaped body can be connected either fixedly or in a removable manner. This body is provided with a specific housing suitable to accommodate an iron interconnected to a steam boiler by a fluid passage duct. The steam boiler may be formed directly in one of the collapsible legs supporting the board or carried, in a substantially vertical position, by one of said legs. Also, the steam boiler may be incorporated in the box-shaped body.

Abstract: Apparatus is provided for use in detecting defects, such as pin holes, cracks and/or uneven gelatin distribution, in capsule shells. The apparatus is comprised of a light box which includes one or a plurality of light bulbs disposed within the box, one or more opaque panels which are disposed in front of each light bulb, and a plurality of openings disposed in the panels, each opening being adapted to receive a capsule body or cap which fits snugly therein and protrudes outwardly away from the light bulbs. Light shining through the capsule shells disposed in the openings indicates defects such as pin holes, cracks and/or uneven distribution of gelatin in the capsules.

Abstract: 7-Oxabicycloheptane substituted prostaglandin analogs are provided having the structural formula ##STR1## and including all stereoisomers thereof. The compounds are cardiovascular agents useful, for example, in the treatment of thrombotic disease.

Abstract: A seed planting apparatus (10) is disclosed having a seed distribution tray (11) with a top plate (17) with perforations (18) therein at the desired spacing of the seeds to be planted. Vacuum draw is provided to a vacuum chamber (25) defined by walls (23, 24) of the tray to hold seeds spread onto the top plate at the position of the perforations (18). The excess seeds not held to the perforations (18) are removed by tilting the tray upwardly, allowing the seeds to be gathered along the upright side walls (19) of the tray and discharged therefrom, with the inverted tray being thereafter supported on a holding pan (12) in an accurately located position over a planting tray or cell flat which is also held in the holding pan (12). When the seed distribution tray (11) is so located, the vacuum to it is cut off and the seeds are allowed to drop down into their desired positions in the planting tray.

Abstract: A roller-type pump for corrosive fluids such as detergents. The pump has a soft internal tube squeezed by rollers to provide the pumping action, and stiff kink-resistant outside conduits conveying fluid to and from the pump. Assembly of the pump's cover with its housing produces a fluid and air-tight connection between the tube and conduits. The pumping rollers are mounted on a spindle made of two identical parts which can be easily assembled and disassembled without tools or fasteners for cleaning, and installed in either direction for ease of maintenance and uniform wear. There are no metallic parts in the pump chamber, and the cover is transparent to allow observation and leak detection during operation.

Abstract: Antibacterial activity is exhibited by compounds having the formula ##STR1## and pharmaceutically acceptable salts thereof, wherein, R.sub.1 is an acyl group derived from a carboxylic acid;R.sub.2 is hydrogen, methoxy, or formamido ##STR2## and one of R.sub.3 and R'.sub.3 is hydrogen and the other is ##STR3## and R.sub.4 is hydrogen alkyl, substituted alkyl, phenyl, substituted phenyl, phenylalkyl or (substituted phenyl)alkyl.

Abstract: A multiple mower arrangement for use on a tractor, comprising a principal mower having at least one rotary blade. A power shaft extends approximately the full lateral width of the principal mower, and delivers power to the rotary blades of such mower. A swingarm mower equipped with a rotary blade is hingedly supported by a hollow arm on the outboard end of the principal mower, with the arm being in turn supported by a hollow hinge. A rotary power shaft extends through the arm and hinge, such that rotary power can be effectively transmitted without the use of belts from the power shaft to the blade of the swingarm mower. A bias arrangement normally biases the swingarm mower into an outwardly extending operative position, with such bias being overcome at such time as the swingarm mower contacts a tree, fencepost, or other fixed object, with power being continuously supplied to the blade of the swingarm mower throughout its full range of operating positions.

Abstract: An automatic pill dispenser for dispensing medical pills having different prescribed administration schedules includes a plurality of pill storage compartments each capable of holding more than one pill, an automatic release mechanism for dispensing pills at predetermined time intervals corresponding with their respective administration schedules, and a pill receptacle coupled to a pill detector such that a pill dispensed from the pill dispenser and received by the receptacle causes the pill dispenser to generate a signal to alert the patient to take the dispensed medicine. Twelve storage compartments, arranged in a ring about a vertically rotating wheel, are preloaded by a patient with all pills prescribed to be taken during a 24-hour period. The patient loads pills into individual storage compartments according to a loading code corresponding to the respective administration schedules of the pills.

Abstract: Television signals generated at a transmitting station are digitized and are then transformed into bit groups by a precoder reducing their information content by eliminating redundancies, as by comparing each pixel of a given frame with the homologous pixel of the immediately preceding frame and, upon detecting their equality, emitting a particular reduction code in lieu of an otherwise emitted luminance signal. A message encoder following the precoder generates outgoing data words which may comprise a luminance value accompanied by an integrity code, a changeover signal accompanied by a reduction code, a numerical value specifying the number of consecutive pixels remaining unchanged from the preceding frame, or a synchronizing code. The bits of the outgoing data words are serialized and are temporarily stored in a buffer register in order to be sent at regular intervals, via a communication channel, to a receiving station where a message decoder regroups them in their original order.

Abstract: Utility model patent for a support for electrical resistances of ovens or kilns with ceramic mantle thermal insulation, used to support resistances of the kind consisting of a filament or ribbon of electrical conductor material laid in a sinuous or fretwork fashion on supports and, in this model, comprised of an isosceles-triangular end 1 which is driven into the mantle 2 and followed by a middle flange 3 which is in turn followed by a cylindrical end 4 on which rests the filament or ribbon constituting the resistance 5, the part being completed with a removable ring 8 which is placed on the free end of the end 4 and holds fast on the said end section 4 the portion of ribbon or filament constituting the resistance 5.

Abstract: A shock-absorbing resilient support for the suspension of a body on a support structure, particularly for the suspension of motor vehicle engines, motor lorry cabs and the like, comprises a chamber having a variable volume, which is filled with gas under pressure and serves to support at least part of the weight of the suspended body. The support further comprises two variable volume chambers filled with a viscous fluid and separated by a dividing wall provided with at least one passage for the transfer of viscous fluid from one chamber to the other upon displacement of the suspended body with respect to the support structure. Valve means are provided to vary the overall flow cross-section which puts the two chambers filled with the viscous fluid into communication with one another in the event of low frequency, high amplitude displacements of the suspended body with respect to the support structure.

Abstract: Process for preparing multilayer printed circuits comprising laminating to a substrate bearing a circuit pattern or electrically conductive surface a photosensitive layer which is tacky or becomes tacky upon exposure; exposing the laminate to actinic radiation through a via image related to the underlying circuit pattern, if present; optionally removing the removable via image of the photosensitive layer in either the exposed or unexposed areas, e.g.

Abstract: A non-removable hanger for a picture frame comprises a pair of flat hanger members having openings at each end, threaded fasteners for pivotably attaching lower ends of the hanger members to opposite vertical sides of the frames and threaded fasteners for attaching upper ends of the hanger members to the wall. The hanger members are attached to the wall after being attached to the back of the frame by rotating or pivoting the picture frame against the wall so that the ends of the hanger members are alternately exposed. The exposed ends are screwed into the wall. A spring lock engages the hanger members and prevents them from pivoting once the frame is mounted and positioned in its proper vertical position.