Abstract: Herbicides derived from 2-cyano-1,3-diones have the formula: ##STR1## wherein R, R.sup.1, R.sup.2 R.sup.3, R.sup.4 and R.sup.5 are as defined in the description. The compounds are intended for use pre- and post-emergence as selective herbicides in maize and a large number of other monocotyledon crops.

Abstract: A therapeutic product formed from a high concentration of white blood cells having a high degree of cell viability. The white blood cells are sequestered from their normal population presence in whole blood by placing the blood into a container and preventing coagulation of the blood, separating the blood into two components, one of which is extremely rich in white blood cells through the use of a reagent and centrifugation, sequestering the white cell concentration, and freezing the white cells.

Abstract: A device for cryoprotecting thermolabile products. A container (20) receives an annular rack (40) which is sealed by an enclosure (60). The enclosure (60) includes an outer stationary toroid (70) and a rotatable core (90). A robotic arm (160) is adapted to move and is supported by the core (90). The robotic arm (160) accesses an interior of the enclosure (60). An access portal (80) allows removal and placement of thermolabile products constrained by a holder (150). The robotic arm (160) accesses product and holder (150) and embarks upon controlled freezing of the product and its location in the rack (40) until subsequent retrieval. A computer controls the rate of freezing and stores in memory the location of all of the stored products. The robotic arm (160) reads the product in storage to assure the correct product is being accessed.

Abstract: Detection apparatus for alerting an operator of a moving vehicle to the proximity of a radio transmitter of known frequency and power, typically in a police vehicle. The detection apparatus includes a scanner radio having a selected channel set to the know frequency so that it provides a channel active signal during the time that the police vehicle transmitter is on. The detection apparatus further includes a timing circuit for generating a delay interval representative of the maximum time for the moving vehicle to pass the police vehicle and circuitry for generating a visual and/or audible operator alarm during the channel active signal and during the delay interval. The scanner radio is also utilized to monitor voice transmissions between the dispatcher and the police vehicle, thereby providing the vehicle operator with additional information regarding nearby police vehicles.

Abstract: A liquid crystal display arrangement is provided with two liquid crystal cells containing twisted-nematic material, and positoned one cell behind the other. Both cells are between a pair of crossed polarizers, and the arrangement can be used to selectively reverse the contrast of a display or it can be used as a matrix display in which cross-talk between adjacent elements is minimized.

Abstract: An oscillator uses a delay line in a feedback loop to determine its frequency of operation. As the loop is capable of sustaining oscillations at more than one frequency the desired frequency is generated by an auxiliary delay line and is gated into loop at the correct instant by gating circuitry C.

Abstract: An LED display is provided with a reflective surface over those parts of the display which do not themselves emit light. This enables a polarizer to be used to enhance the display contrast under conditions of bright ambient light.

Abstract: A method of manufacturing an array of light emitting diodes in which a first insulating sheet carrying a first set of mutually isolated conductors is bonded to a sheet of thermally conductive material, a second, perforated, sheet carrying a second set of mutually isolated conductors is bonded to the first insulating sheet with the perforations overlying the conductors of the first sheet and the two sets of conductors crossing one another, light emitting diodes are placed in the perforations to contact each with one electrode a conductor of the first set and the other electrode of each diode is electrically connected to a conductor of the second set.

Abstract: An automatic record player for playing disc records of different sizes including a mechanism for raising and lowering and pivoting upwardly and downwardly the pick-up arm at the end of playing of a record and including a switch-off means to switch off the record player when all the records carried on the centre spindle have been played, the switch-off means including a trip latch movable from a first to a second position in dependence upon the resistance to movement of the control member of the centre spindle, the resistance being determined by the presence of at least a predetermined number of records on the spindle and the trip latch being effective in the first position to permit continued operation of the record player and being effective in the second position to actuate the switch-off means to switch off the record player.

Abstract: A method of processing granular material by passing a gas in contraflow to a bed of the material descending in an independently rotatable annular chamber of annular width a surmounting an annular eccentrically rotating floor, the outer bed wall being in gas-tight sliding relationship to the floor but the inner wall being spaced above the floor by a distance h, not less than, and not more than 10 percent in excess of, the value satisfying the relationship tan .phi. = h/a where .phi. is the operative angle of repose of the charge material at the bottom of the bed.

Abstract: A record player including a turntable driven by a motor through a jockey pulley interposed between the turntable rim and a spindle driven by the motor in which the spindle is stepped to provide a number of portions of different diameter and the portions themselves being slightly tapered so that adjustment of the pulley axially of each portion permits a fine adjustment of the speed of rotation of the turntable, and in which the jockey pulley is mounted on a speed change arm which can be moved to move the jockey pulley axially of the spindle by a cam means driven by a manually operable drive element, and wherein a manually operable pitch adjusting member is also provided for rotation about the same axis as the manually operable drive element to cause axial movement of the cam means relative to the drive element and hence of the jockey pulley relative to the spindle to permit fine adjustment of the speed of rotation of the turntable.

Abstract: A sewing machine is provided with a lubricating pump that is operated when work feed members of the machine are engaged or released whereby a quantity of lubricating fluid is delivered to the machine mechanism immediately before the mechanism begins to run. A reciprocatory pump is used and supplies the fluid to a manifold having multiple feed apertures over required lubrication locations for the fluid issuing from the apertures to fall onto said locations. The manifold is displaceable as a unit to give access to the mechanism below it.

Abstract: The invention relates to the manufacture of arrays of light emitting diodes (L.E.D.'s) from a wafer consisting of an n-type epitaxial layer on an n.sup.+ substrate. The method includes the steps of forming p-type islands by diffusing a p-type dopant into the epitaxial layer of an n on n.sup.+ wafer, establishing contact with all of the p-type islands by means of a first set of conductors, mounting the wafer on a transparent support with the first set of conductors adjacent the support, depositing a second set of conductors on the n.sup.+ substrate and etching both the substrate and the epitaxial layer from between the conductors of the second set, the two sets of conductors being orthogonal and each p-n junction formed by a p-type island and the epitaxial layer being in contact with one and only one conductor from each set.