Abstract: A ribbon feed mechanism for the inked ribbon of a printing machine comprises two ribbon-carrying spools rotatably supported in a removable cartridge and two sensing levers which extend through a pair of apertures in the cartridge to sense the amount of inked ribbon on the spools. The sensing elements cooperate with corresponding latches for retaining a reversal member against the action of a reversal spring which biases the reversal member from a first position to a second position. The reversal member supports two freely rotatable pinions which are moved by the reversal member, as it moves into the first and second positions, into mesh respectively with corresponding spool gears coupled to the two spools and with two gears driven by a feed element in opposite directions. The spools are therefore alternately driven first in one direction and then the other direction respectively.

Abstract: A process for the treatment of aqueous sulphuric acid solutions of a metal salt or salts containing ferrous sulphates wherein the pH value of the solution is adjusted by the addition of a calcium compound to selectively precipitate calcium sulphate after which the precipitated calcium sulphate is separated and calcined before adjusting the pH of the mother liquor to a value in the range 7 to 9 by the addition of a calcium-containing compound to precipitate there from solid metal compounds which are then separated and/or calcined.

Abstract: A glazed ceramic article in which the glaze includes titanium dioxide at least some of which is in the form of a metal titanate or a metal titano silicate and having a gloss of from 9 to 55 units at 45.degree. illumination. Also a glazing composition is described prepared by a semi-fritting technique in which the composition includes a mixture of a finely divided frit and an unfritted crystalline silica with the titanium dioxide being included in the frit together with alumina and a source of strontium, calcium or magnesium.

Abstract: An electroluminescent screen comprising a plurality of continuous phosphor stripes running the length of the screen formed on a panel for a color cathode-ray tube by applying film containing photosensitive material onto the panel. A shadow mask is attached to the panel, and the mask and film are irradiated by light from a light source.The shadow mask has on its concave face which faces the light source apertures arranged in substantially parallel rows, the apertures along the length of each of the rows being separated from each other by thin beam-intercepting bridge portions. The area on the shadow mask irradiated by the light is limited to cover only a part of the length of the rows of apertures by a shield plate having an opening for limiting the path of the light.The shield plate is moved so as to move the irradiated area on the shadow mask along the length of the rows of the apertures.

Abstract: A filming camera having a synchronous sound recording of the type in which the film is driven by a claw undergoing a reciprocating movement produced by a motor and, downstream of the claw, by a capstan driven by a second motor, wherein the claw motor has a constant speed and the capstan motor speed is variable and means are provided to make the average speed of said capstan motor a determined function of the claw motor speed.

Abstract: A method for characterization of biological activity comprising providing a plurality of gas-tight cells each having a light-permeable wall section, each cell containing a different .sup.14 C-labeled fermentable substrate, a carbon dioxide absorber and a scintillation compound in intimate proximity to each other remote from said substrate, and an axenic sample of a biologically active material; subjecting said cells to conditions conducive to biological activity and thereafter measuring the light emitted by the scintillation compound as a result of the decay of .sup.14 CO.sub.2 generated by the metabolic action of the biologically active agent in said sample on said substrate and captured by the carbon dioxide absorber. Apparatus is provided comprising a plurality of sterile chambers containing different .sup.

Abstract: An artificial turf-like product having a surface which exhibits game playing characteristics approaching those of natural turf is provided by interspersing a layer of non-compacting granular material comprising irregular angular particles having a size in the range from 6 to 100 U.S. screen mesh size, preferably from 12 to 50 among the upstanding pile elements of a synthetic pile fabric.

Abstract: A scale system including a vertically displaceable crown supported by a longitudinally displaceable center section. A sensing means disposed above-ground is actuated by the center section in response to a weight applied to the crown. The sensing means sends a signal to an interpreting means. Inclined, mating surfaces interconnect the crown and the center section so that the crown is displaceable substantially vertically only and the center section is displaceable substantially longitudinally only. Alternative embodiments of the invention include a friction-reducing material for the inclined surfaces to render the coefficient of friction therebetween substantially a constant; a sealing means for the inclined surfaces to prevent deterioration thereof; restraining means for the center section to impede the displacement of the center section and prevent overload of the sensing means; and a locking means to prevent removal of the crown from the center section.

Abstract: An analog signal PCM signal/PCM signal-analog signal converter having a sawtooth generator, the sawtooth voltage of which is compared in a first comparator with the analog signal to be converted, the sawtooth signal being represented in instantaneous amplitude by code chains provided by a register which also provides timing pulses coincident with the pulse rate of the PCM signals. The analog comparator controls the forwarding of the code chain corresponding to the analog signal to be converted and delivered through a compandor which allows for non-linear signals.Incoming PCM signals are compared with the code chains as fed through the compandor in a digital comparator which utilizes a positive result to gate the sawtooth voltage output and generate an analog signal.

Abstract: A game apparatus suitable for playing with balls which includes a first base member having two opposed holes within which are releasably secured an inverted U-shaped member which extends over a central opening in the first base member, which opening collects balls in the game, the first base member having a plurality of further holes spaced around its periphery with a plurality of pegs located in the peripheral holes.

Abstract: Apparatus is provided for debugging a utility program without material increase in the memory capacity required. Such apparatus performs the debugging functions by using only the input-output devices as the keyboard, the console, the display, the M.C. reader which normally equip the computer. Actuation of a correction key activates the debugging program and interrupts operation of the utility program. The debugging program may be stored in a reserved portion of a ROM, or transferred into a predetermined storage area from magnetic card storage. This area is predetermined not to hold information significant to resumption of the utility program under test. A search is then made of the utility program, e.g., by addresses of the individual instructions, for the erroneous instruction. Upon discovery thereof, a correct instruction is keyed in directly from the keyboard to replace the erroneous instruction.The debugging program records this correct instruction at the approriate addressed location in memory.

Abstract: By adding a specific amine in culturing under aerobic conditions actinomycetales capable of producing phleomycin group antibiotics, which have been inoculated into a nutrient medium to produce antitumor phleomycin group antibiotics, it is possible to obtain specific phleomycin group antibiotics having a side chain structure corresponding to said amine. The phleomycin group antibiotics thus produced are collected from the culture medium in a conventional way.

Abstract: A method is described for establishing character frame synchronism between a teletypewriter transmitter and receiver wherein the direction of transmission is unidirectional. The transmitter sends character signals identifying characters of the alphabet or the like and operating condition signals corresponding to the operation condition of the transmitter. The operating condition signals are processed in a code converter which allocates code words to them permitting recognition of the character frame. The code words are transmitted to the receiver wherein a clock signal is derived by means of a character frame discriminator. The code words are reconverted in the receiver in order to cancel the code conversion which took place at the transmitter.

Abstract: Glass fiber reinforcing members with at least one end anchorage point are formed from glass fiber rovings impregnated with resin and shaped into a ribbon. The ribbon is surrounded before curing at discrete intervals with castings which, after curing, provide areas which can be formed into anchorage areas.

Abstract: A method and apparatus for texturing continuous filament yarn wherein the yarn is fed at a controlled rate and under controlled tension into a confined crimping zone against a mass of crimped yarn therein causing the yarn to collapse longitudinally forming crimps which become part of such mass. Heat and pressure are applied to the yarn mass in the crimping zone to plastically deform the yarn and partially set the crimps. The crimped yarn mass is then fed at a controlled rate from the crimping zone into a setting zone. Heat and pressure are applied to the yarn mass in the setting zone to fully set the crimps. The pressure applied to the yarn mass in the setting zone is substantially only sufficient to keep the crimps closed during the final setting thereof. The crimped yarn mass is then fed from the setting zone into a cooling zone.

Abstract: A saw chain for a chain saw with kerf sidewall cutting, free end chisel raker teeth having positive cutting edge rake angles and with bifurcated cutters formed from paired, laterally opposed cutting elements wherein the free end chisel corners of the raker teeth project laterally outwardly beyond the bifurcated cutter forming elements so that the combined cutting width of two mirror image raker teeth is greater than the cutting width of the bifurcated cutters; the height of the bifurcated cutters being generally equal to or less than the height of the raker teeth; the cutting edges of each raker tooth and each bifurcated cutter being disposed rearwardly of the rearmost pivot point of the link which bears it, and the outer surfaces of the shank portions of the raker teeth and the outer surfaces of the bifurcated cutter forming elements being formed to engage the upper edges of the immediately following side links to lock each cutter bearing link against rearing back more than a specified amount.

Abstract: In a radar target acquisition system means are provided for analyzing the video return including an automatic gate circuit causing the range gate to sweep out, and to sequentially sample the video return; a filter acquisition video processing circuit including means for discriminating between random and sinusoidal amplitude modulation appearing on the video return and having known frequency characteristics equal to the scan and pulse repetition frequencies of the radar within the pass band of the filter circuit, and means for comparing the discriminated amplitude modulated video return signal to at least one established threshold; and a track circuit which remains de-activated during the sweeping mode and is activated upon command from the filter acquisition circuit. Means are provided for manually initiating the gate circuit and for inhibiting the track circuit to await response from the filter acquisition circuit.

Abstract: Degassing apparatus for removing entrained gas bubbles from drilling fluid comprises a conduit through which drilling fluid may flow and a cavitator located within the conduit. The conduit includes generally opposed first and second surfaces positioned to contact drilling fluid flowing through the conduit. The cavitator has first and second surfaces respectively opposed to the conduit first and second surfaces and is reciprocatable between a first position proximal the conduit first surface and a second position distal the conduit first surface and proximal the conduit second surface. In operation, drilling fluid is conducted through the conduit, and the action of the cavitator alternately compresses and then rarefies the fluid between the cavitator surfaces and the respective opposed conduit surfaces.

Abstract: A color cathode ray tube provided with a fluorescent screen formed on the inner surface of the face plate of the envelope and comprising a plurality of stripes of phosphor elements, and a shadow mask formed with a plurality of slit apertures corresponding to the stripes of the phosphor element. Said slit apertures are spaced apart by transverse bridge members. Each slit aperture is surrounded by inclined side walls, and the cross-section of each transverse bridge along the longitudinal axis of the slit aperture takes a form of a hexagon having two lateral rising edge portions positioned at about the middle of the thickness of the shadow mask.

Abstract: A process is provided for making high-quality carbon blacks at unusually good yields in a highly compact reaction space. The key steps of the process are the generation of a very hot combustion gas stream moving at very high speed in essentially plug flow by burning a hydrocarbon gas in oxygen in a compact combustion zone under conditions of very high heat release assuring the attainment of temperatures of over 3,000.degree. F., and the transverse injection into said highspeed combustion stream from the periphery thereof of a plurality of individual streams of liquid hydrocarbon make, each of which is injected under sufficient pressure to cause same to enter said high-speed combustion stream at a linear velocity of more than about 100 fett per second. Preferably, a highly oxygen-enriched oxidant is used to burn the hydrocarbon gas.