Abstract: A digital tachometer arrangement in which pulses resulting from rotation of a shaft, are counted over a predetermined time interval. The time interval is established by counting pulses from a high frequency oscillator. The counting of pulses from the high frequency oscillator is begun only at a predetermined instant when the pulses from the rotating shaft attain a positive edge. Relating the beginning of the time interval precisely to a predetermine edge of the pulses from the rotating shaft, provides for a stabilized display which counts the pulses from the shaft during the preset time interval. The count of the pulses from the rotating shaft over the preset time interval, is proportional to the rotational speed of the shaft, and is displayed on a digital readout connected to a binary-coded decimal counter receiving pulses from the rotating shaft.

Abstract: Substituted phenyl thiocarbamates and the method of producing them, are provided for selective weed control in cultivated grasses.

Abstract: Substituted phenyl thiocarbamates either per se or herbicides contain them and methods for their production are provided herein. Such compounds are available for destroying or inhibiting undesirable plant growth in cabbages.

Abstract: An arrangement for regulating the evaporation rate and the layer buildup in the production of optically effective thin layers in a vacuum on substrates with controlled evaporator power and with continuous measuring of the optical characteristics of the deposited layer. The evaporation is started with a given evaporator power and with the start of change of the optical characteristics of the layer, the measured result after forming the time derivative is continuously compared with the output signal of a signal generator. This output signal reproduces the time rate of change of the optical properties during the layer buildup. The difference signal of the comparison signal is used to increase the evaporator power if the layer buildup lags, and to reduce this power if the layer buildup is too fast.

Abstract: Alkyl N-3-carbamoyloxyphenyl-carbamates of the formula ##STR1## selectively damage or destroy weeds in crops of carrots, cotton, peanuts, and rice without damaging the crop plants when R.sub.1 is lower alkyl, allyl, or halo-lower-alkyl; R.sub.2 is lower alkyl, allyl, halo-lower alkyl, lower alkinyl, cyclohexyl, benzyl, or phenylethyl; R.sub.3 is methyl and ethyl; and X is oxygen or sulfur. Lower alkyl and lower alkinyl in the formula have up to four carbon atoms.

Abstract: Compounds having herbicidal and algicidal action are provided of the general formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are identical or different alkyl radicals, and R.sub.4 is an acid radical, or the radical of an acid compound or is ##STR2## with R.sub.1 ', R.sub.2 ', and R.sub.3 ' having the meaning of R.sub.1, R.sub.2 or R.sub.3 respectively, and wherein X represents oxygen or sulfur.

Abstract: An arrangement for the manufacture of solid forging blocks with manipulator pins in which an electro-slag remelt process is used for filling an ingot having a vertical bore hole. At least one consumable electrode is used, and the ingot with the vertical bore is placed on a block table having at least one power connection in the region of the block table and flush with a depression for slag start material. The filling of the core zone is started with this depression having a depth of substantially at least 25% of the diameter of the block bore. A movable starting disk is applied as a lower boundary of the depression, and the slag start material is placed on top of the disk. After formation of liquid slag, the depression is exclusively filled from material of the consumable electrode. The power connection to the starting disk is fed along during the entire remelt process.

Abstract: An alkaline - cyanide free or substantially cyanide-free bath is provided for the electrodeposition of a bright levelled zinc coating; said bath containing a zinc salt, alkali hydroxide and conventional additives and a reaction product of unsaturated nitrogen heterocyclic hydrocarbon compounds containing at least two nitrogen atoms in the ring with epihalogen hydrin or glycerol halogen hydrin.

Abstract: A rodent baiting arrangement in which modular plastic units are assembled to form an entrance and feeding station into which rodents may pass, consume poisonous bait therein, and exit. The modular units may be assembled for placement along a wall or corner of an interior room or space, while being inaccessible to children and domestic animals. The assembled modules form a housing for the rodents, with feed and water therein. The modules may have transparent top surfaces to allow inspection of the interior of the modules.

Abstract: A measuring device for determining the rate of evaporation of materials in vacuum systems, particularly for producing thin layers of precise thickness on substrates. An electrically conducting housing has an opening which can be aligned with the material to be evaporated. An electrode located within the housing and insulated therefrom, is connected to an evaluation device for the evaporation rate. The electrode is located outside the line of sight through the opening of the housing, and the electrode has a positive potential with respect to the housing. The current flowing between the housing and the electrode is applied to the evaluation device.

Abstract: An arrangement for regulating the vapor deposited layer build-up in the production of deposited optically active thin layers on substrates in a vacuum. The optical characteristics of the deposited layer are measured continuously and the measurements are converted into proportional electrical signals. These signals are differentiated twice, with the second derivative serving to provide the zero-axis crossings of the signals. The vapor deposition process is interrupted dependent on the zero-axis crossings.

Abstract: An arrangement for the chemical treatment or galvanizing of articles or bulk materials in which the articles to be treated or processed are made of metal, plastics or other materials, and are held within a drum. The wall of the drum is provided with distributed openings or perforations having a conical shape in an alternating manner.

Abstract: The tarnish resistance of silver and silver alloy surfaces can be improved by brief contact in a liquid medium with compounds of quadrivalent tin bound by at least one valence to alkyl having 2 to 22 carbon atoms, and by the remaining valences to sulfur, the tin compounds being of the formulas ##STR1## IN SAID FORMULAS R.sub.1, R.sub.2, and R' being alkyl having 2 to 22 carbon atoms, R" being alkyl having 4 to 22 carbon atoms or --CH.sub.2 COOR.sub.3, R.sub.3 being alkyl having 1 to 22 carbon atoms, and n being 1, 2, or 3.

Abstract: The specification discloses the preparation and use, as fungicides and nematocides, of 2,5-substituted-1,3,4-thiadiazoles having the structure: ##STR1## wherein R.sub.1 is a lower haloalkyl and R.sub.2 is an aliphatic hydrocarbon.The instant invention is directed to methods for the control of fungi and nematodes in soil and seeds and to compounds useful in such methods. In another aspect, the invention is concerned with the preparation of 2,5-substituted-1,3,4-thiadiazoles and formulation for agricultural use in which such compounds are the principal biocidal ingredient.

Abstract: An arrangement for processing information pertaining to articles to be treated in automatic electroplating plants with work stations, article transport means, and article storage or holding locations. To each transport device and each location in the electroplating plant, there is assigned at least one storage unit which is logically connected with the central control unit and with the transport device circuit elements triggering the transport operation. It is also connected with the article storage or holding locations. The prevailing information pertaining to the articles treated is always inserted in that storage which is assigned to the transport device or to the location where the article is positioned at that time.

Abstract: An arrangement for the degassing of metallic melts in which a rotating member is immersed in the melt. The rotating member has step-shaped elements which form vacuum chambers or spaces during rotation of the member. The vacuum spaces are not filled with melt, and gases are extracted from the melt and carried away from the vacuum spaces with the application of inert gases or reaction gases.

Abstract: A cyanide-free bath for the galvanic separation of rare-metal alloys in which a rare metal is present in the form of a thiosulphate compound. The rare metal may be gold and/or silver, and/or palladium. The rare metal is present in concentrations of 0.01 to 70 g/liter.

Abstract: An electron beam generator with a linear cathode which has at least one end clamped to enable the cathode to move longitudinally. A beam forming electrode is at the same potential as the cathode and has an exit opening for the electron beam. The beam-forming electrode is provided with connection means to supply beam and heater voltage to the cathode. The clamps used to clamp the cathode, are connection contacts for the ends of the cathode and are outside of the contact points in the emission area of the cathode.

Abstract: An arrangement in which samples drawn from a melt are sealed against air, and are allowed to solidify, while the gases given off are collected for analysis. A hollow, thin-walled, metallic element is used, which narrows at its lower end into an orifice. The element is degassed at high temperature before being sealed for use, to remove hydrogen and organic impurities.