A drilling support for a rock perforator, of the type comprising: a jib on a boring support carrier; a drilling carriage pivotally arranged above the jib; a rock-perforator power-tool slidably arranged on the drilling carriage; a first power drive connected to the boring support carrier for lifting and lowering the drilling carriage and an additional power drive pivotally connected with the drilling carriage for positioning the drilling carriage. The provision of the additional power drive enabl...

Process and device for saltless, oxidation-free remelting of aluminum, its alloys and of aluminum scrap with miscellaneous impurities, such as combustible oily substances, adherent combustible or noncombustible materials and those with a higher specific weight in a rotating drum (1) with a combustion chamber (4), two supply valves (5, 6) and one burner nozzle (32), in the conventional manner the fuel being natural gas or heating oil, and the oxygen being supplied with air via the supply valve (6...

Novel methods of medical treatment and/or inhibition of development of diseases are disclosed for diseases that are sensitive to androgenic or estrogenic activity. The treatments utilize inhibitors of type 5 and/or type 3 17.beta.-hydroxysteroid dehydrogenase. Novel inhibitors of type 5 17.beta.-hydroxysteroid dehydrogenase are also disclosed, as are novel inhibitors of type 3 17.beta.-hydroxysteroid dehydrogenase.

A positioning arrangement for a drilling machine or the like in which the desired position of a bit of the drilling machine mounted on a boom structure is indicated based on rectangular coordinates for facilitation of automatic positioning programming for the boom structure, with the position of a particular boom end being designated by numerical values for quick and accurate positioning of the boom structure at the required positions.

A rotary actuator is pivotally mounted on the end of a drill boom and supports a rock drill feed bar for rotation about a longitudinal axis of the actuator. The rotary actuator includes a piston with a piston rod portion having external and internal helical splines engaged with cooperating splines on the actuator housing and a rotating shaft, respectively. The shaft is connected to the feed bar and is operable to rotate the feed bar in response to axial movement of the piston. The axis of rotati...

Highly concentrated solutions of coupling components of the ice-color dyeing technique had been found which possess a very good stability to storage and can readily be used for the preparation of diluted aqueous bottoming baths of the ice-color technique; these novel solutions contain the coupling component, water, sodium-or potassium hydroxide, and are characterized by the imperative content of diethylene-glycol or a content of a mixture of diethylene-glycol and ethylene-glycol or propylene-gly...

A device for mounting a material compactor on a vehicle including means for securing the mounting device to the vehicle, a baseplate including an adjustable connection to the vehicle securing means, a pair of linkage arms pivotally mounted to the baseplate to allow conformation of the compactor to ground level, upper and lower spaced pairs of connecting arms having one end pivotally joined to the linkage arms and the other end pivotally connected to the material compactor to allow vertical compa...

Scarcely dusting ice color coupling components are obtained by admixture of .5 to 15 percent by weight of an addition product of 2 to 5 mols of ethylene oxide to a lower alkanol, the resulting polyether having a molecular weight of about 150 to about 280. Optionally surfactants, complex-forming agents and inorganic salts are added.

Drilling apparatus that includes a skid mounting a mast assembly, an engine, and control assembly, the mast assembly including a derrick section, a drill head and drill head motor mounted on the derrick section for reciprocal movement relative thereto, and support members pivotally mounted on the skid for selectively supportingly retaining the derrick section in a vertical drilling position, an inclined angle hole drilling position and a horizontal transport position. One of the support members ...

In a pile driving device for driving a pile particularly into a soil located beneath a body of water, said device mainly comprising a hammer, a guide frame for guiding said hammer and suspension means for suspending the guide frame to a lifting device, said guide frame comprising a base piece surrounding the pile with sliding fit and at least one guide stay fastened to said base for guiding the hammer, the suspension means engage the hanger of the lifing device in a vertical plane of suspension ...