Abstract: A programmable control for load management of a plurality of electrical power loads is disclosed which contains at least two groups of load controllers for controlling the power supply to loads connected to various pre-selected load controllers. A group selector selects which of the groups is functionally operative at any given instant in time based on environment or other criteria. A serial selector commonly connected to each of the load controllers in the groups serially selects one of the load controllers in each group for conduction for at least one period of the serial selector. There is provided a first set of programming points situated at the input to the load controllers. The programming points are selectively connected by wires or diodes in any desired fashion to modify the conduction period or order of the various load controllers.

Abstract: An abrasive material and process for manufacturing the same. The process comprises: (i) applying a basic binder layer to a flexible support; (ii) scathering abrasive particles onto the basic binder layer; (iii) drying and subsequently cooling the resultant product; (iv) applying a second binder layer as a sizer to the cooled product of step (iii); (v) drying and cooling the sizer; (vi) loosely rolling up the product of step (v); and (vii) curing and subsequently cooling the product of step (vi) by passing a heating or cooling air stream substantially axially through the rolled-up product. The basic and second binder layers each comprise an aqueous mixture of (A) at least one predominantly ortho-structural resol having a molar ratio of phenolic component to formaldehyde of from 1:(1.1 to 2.5), and (B) at least one polyvinyl alcohol in an amount of from 5 to 30% by weight based on the weight of solid phenolic resin.

Abstract: A highly-reactive powder resin composition suitable for use in the production of coatings comprising a mixture of(A) at least one polymer containing groups selected from hydroxyl and epoxy-groups, having a melt viscosity of 2 000 to 20 000 cP at 160.degree. C. and a melting range of from 45.degree. to 95.degree. C.; and(B) at least one compound of formula ##STR1## wherein R represents an aliphatic hydrocarbon group-- being substituted by an ester or a carboxy group or being interrupted by an O-ether linkage --R.sup.1 represents phenyl or naphthyl andy is an integer from 2 to 4said component B having a melt viscosity of 50 to 15 000 cP at 160.degree. C. and a melting range of from 40.degree. to 250.degree. C.;the combination of A and B having a melt viscosity of from 500 to 20 000 cP at 160.degree. C., a stability of from 1 to 15 at 100.degree. C., a flow time of from 20 to 600 s at 160.degree. C., and a gel time of from 35 to 1,200 s at 160.degree. C. and an article coated with said composition.

Abstract: A mine roof-bolter machine having an extensible conveyor running therethrough operates behind a continuous miner machine. As the continuous miner advances, the roof-bolter advances from position-to-position while installing roof bolts and plates, and the extensible conveyor gives and takes the slack between the continuous miner and the roof bolter and feeds mined material to a surge car behind the roof bolter.

Abstract: The invention facilitates the movement of particulate matter (such as a powder) over a surface by making the surface from a material which is porous to gas. In use, gas is forced up through the surface and into the particulate matter. This makes the particulate matter flow more easily over the surface. The invention is claimed to be particularly useful for assisting the flow of matter inside a tank to facilitate discharge of its load.

Abstract: A composition for use as a binder in a non-aqueous printing ink which comprises a modified hydrocarbon resin containing carboxylic acid units, the carboxylic groups of which are partially esterified with a polyhydric alcohol in such an amount that the modified hydrocarbon resin product contains from 0.01 to 0.7 ester groups of polyhydric alcohol based on each acid group originally present and a process for its preparation.

Abstract: A solar-powered thermionic-photoelectric current generator is disclosed employing a paraboloidal telescope for collecting and concentrating sunlight into a narrow beam which is incident upon a thorium-doped tungsten cathode target within an evacuated envelope, the light being incident on the target at a very large angle of incidence. An anode arranged substantially parallel to the beam of light incident on the cathode target surrounds the major portion of the cathode target and extends an appreciable distance rearwardly from the cathode target. A gas impervious envelope maintains the region of space immediately surrounding the anode and cathode target at a desired vacuum. Electrical conductors leading from the anode and cathode target to points outside the gas impervious envelope can connect the anode and cathode target to an appropriate load.

Abstract: A single use disposable package formed from a corrugated paper or fiberboard or other paperboard blank made into a six-sided box for containing cat litter. The package is used in the open position where the top section of the box is held rigidly by the mutual engagement of tabs and slots formed by perforations in the top sections. One top section is perforated and scored to enable part of that top section to be folded downwards and inwards to make an adjustable-sized opening for the entry and exit of a cat.

Abstract: An analog PAL color television signal which is to be encoded is passed through a comb filter to separate the signal into a chrominance component and a luminance component each having a carrier frequency. Each signal is then separately scanned at a rate which is directly related to the color carrier frequency (4.43 MHz) of the signal. The luminance signal is fed to a scanning and holding circuit which scans it at a rate of twice the color carrier frequency or 8.86 MHz. The chrominance signal is fed to a scanning and holding circuit which scans it at a rate which is one-half the color carrier frequency of 2.21 MHz. This scanning and holding of each component signal converts the signals into a corresponding PAM signal. Each PAM signal is then quantized and encoded in a PCM coder. The resulting signals are applied to a digital combiner which thereby produces a digital color video signal.

Abstract: The invention concerns a color television camera for providing a color television signal suitable for recording. The camera comprises separate transducer means for deriving the luminance and chrominance information bearing signals, the transducer means being controlled so that the color information scanning takes place during the line frequency flyback of the luminance scanning. The luminance and chrominance signals are subsequently interleaved by time division multiplex and the resulting signal can be recorded by the use of simple magnetic recording devices.

Abstract: The invention concerns an apparatus for the amplitude discrimination of a video signal of the kind wherein the video signal is applied to a window discriminator which is adapted to provide a binary signal during periods when the amplitude of the video signal lies in a predetermined sub-range of the total amplitude range of the video signal.In order to avoid the presence in the binary signal of transient pulses which result from the slow rise time of the video signal when the latter effects a transition across an edge between an area of picture with the video signal amplitude below the said sub-range and an area of picture with a video signal amplitude above the sub-range, second and third binary signals are produced when the amplitude of the video signal lies above and below the sub-range respectively.

Abstract: In a video alarm system with digital evaluation the analog video signal generated by a television camera is converted into a binary signal by comparison with a threshold-value signal in an amplitude discriminator, and the binary signal is then evaluated, for example by summing. The threshold-value signal is in the form of an alternating voltage which sweeps over the black-to-white amplitude range of the picture information containing portion of the video signal a plurality of times during each line period. Compensation is provided for fluctuations of overall brightness in the scene from which the video signal is derived by inverting the binary signal to be evaluated during alternate sections of each line period.

Abstract: The invention concerns an alarm system for detecting a movement or change in the field of view supervised by a television camera. A discriminator, for example an edge discriminator or an amplitude discriminator, produces a signal upon the occurrence of a predetermined characteristic in the picture content of the video signal from the camera. The number of such signals occurring during each of a plurality of successive television fields is compared with a reference value which is periodically updated. The reference value is derived by counting the total number of signals occurring during a plurality of field periods preceding that for which the comparison is effected and dividing the total by the number of fields thereby generating an arithmetical mean value. Each comparison generates a difference signal which is further evaluated to determine whether a relevant variation in the field of view of the camera has occurred, whereupon an alarm is released.

Abstract: After wet-drilling a hole until a bearing strata is reached, a mandrel with a removable overboot is lowered into the hole and the overboot is seated by a few hammer blows. The mandrel is than partly filled with thick concrete from its top, the top of the mandrel sealed, air-pressurized and a mechanical lifting force is applied. The pressure of the air within the mandrel plus the weight of the concrete forces off the overboot, and also forces the thick concrete against the sides of the hole, and the concrete forms a seal between the sides of the hole and the mandrel. The air pressure also helps lift the mandrel out of the hole.

Abstract: A process for producing formcoke composed of char and selected binders comprising process steps in which non-oxidative thermal carbonization is employed.

Abstract: Alternatively usable gear trains provide either a steady or an intermittent drive for a sinning reel. In intermittent drive condition, the gear train provides "stop and go" motions of different duration, and different "stop and go" patterns are obtained through alternatively usable gear trains.

Abstract: Two spaced electrodes having a load in an external circuit connected between them are disposed in an electrically conductive liquid, and energy is imparted to the liquid in such manner that energized free electrons in the liquid excite free electrons which flow into one electrode to a greater degree than in the other electrode, thereby causing electric current to flow in the external circuit through the load.

Abstract: Compounds of general formula ##STR1## wherein R.sup.1 represents a radical selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, an unsubstituted aryl group having 6 carbon atoms, an aryl group having 6 carbon atoms being substituted by at least one radical selected from the group consisting of a chlorine atom, alkyl and alkoxy each having up to 2 carbon atoms; and R.sup.2 represents an alkyl group having from 1 to 6 carbon atoms.

Abstract: A fountain brush includes a three piece reservoir removably secured to the stem of a brush element. A cylindrical chamber of the reservoir includes a pair of helical grooves running along an inside wall. A hollow bifurcated cylindrical liner slips within the cylindrical chamber and is retained by partially circumferential protusions engaging a circular retaining ring on the inner wall of the reservoir. A follower is slidably situated within the bifurcated liner, the follower having two diametrically opposed projections extending through the longitudinal slots bifurcating the liner and engaging the helical grooves of the inner wall of the reservoir. The follower includes a circumferential lip maintaining intimate contact with the inner surface of the liner.

Abstract: Heat storage means are provided for reducing heat loss from a liquid crystal thermographic sheet, which normally has good heat transmission characteristics in order to respond readily to temperature variations along a body surface against which the sheet is pressed. The heat storage means include a sheet or layer of material having relatively poor thermal conductivity disposed adjacent to the thermographic sheet. One or more reflective sheets or layers may be used for reflecting the thermal image back into the layer of poor thermal conductivity.