FIELD: mechanical engineering. SUBSTANCE: measurement controlling system is composed of two converters of linear translations, control unit and auxiliary devices. Positions of crossing of measurement lines of measurement controlling system with working surface of template and with machined surface of blank are checked. Template has cylindrical working surface. During active test coordinate of any ...

FIELD: mechanical engineering. SUBSTANCE: gear is designed to form axially displaced cutting layer on standard grinding wheel. It is manufactured in the form of cantilever mandrel with butt protrusion eccentrically displaced which carries coupling conjugated to it and changing orientation of own axis. Coupling having eccentricity alpha, where H is height of grinding wheel, mm; D is outer diameter ...

FIELD: organic chemistry and chemical technology. SUBSTANCE: method involves interaction of 4-12 moles phenol with 1 mole acetone in multisection reactor column with suspended catalyst layer. Column has a raw of perforated plates and drain tubes being both have screens where ion-exchange resin particles in acid form are placed. All phenol is loaded up to superior plate and all acetone is added in ...

FIELD: heat and refrigerating engineering. SUBSTANCE: gas mixture is circulated by fan in closed system; in first hot zone of this system ozone and oxygen molecules are treated by electric discharges and ultra-violet radiation quanta and are converted into ions of oxilit (monatomic oxygen) and three electrons, thus liberating heat. Then oxilit ions and electrons are transported to second cold zone...

A laryngeal mask of the type used to facilitate lung ventilation and the inserti on of endotracheal tubes or related medical instruments through a patient's laryngeal opening as used during general anesthesia, intensive care, or critical patient care. The mask includes an inflatable positioning shield formed to fit within a patient's oropharynx and seal around t he circumference of the laryngeal o...

An endo-tracheal tube retainer used to facilitate the removal of a laryngeal mask of the type used to facilitate lung ventilation and the insertion of endo-tracheal tubes or related medical instruments through a patient's laryngeal opening is provided. The endo-tracheal tube retainer includes a semi-rigid stylet having proximate and distal ends and a soft curved stylet cap secured to the proximal ...

FIELD: manufacture of building materials. SUBSTANCE: cement contains Portland cement clinker and 1-4 wt % of sulfate component consisting: gypsum, 30-70%; and fluoroanhydride, 30-70%. Cement may additionally contain 3-20% (above 100%) nepheline oil. EFFECT: reduced consumption of natural raw material, improved quality of cement, and simplified manufacturing technology. 2 cl, 2 tbls

FIELD: chemical technology, polymers. SUBSTANCE: formed articles made of polytetrafluoroethylene as film, band, fiber. Articles are made of side-by-side located components exhibiting shrinkability at heat effect at shrinkage degree by 1%, not less. Biocomponent flat article is made by forming two powders forming. Then product is rolled, caked and drawn. The obtained articles exhibit stable winding...

FIELD: automation of drilling of oil wells. SUBSTANCE: invention makes it feasible to optimize drilling process by direct adjustment of it at each time moment depending on measured parameters characterizing movement of drilling head. Physical parameter characterizing movement of drilling head in close proximity to drilling head is measured. Electric characteristic of drilled medium is measured in ...

In order to discharge the gas, which enters together with powder polymer through a polymer discharge pipe from a gas-phase polymerization vessel into a sedimentation tank, from the sedimentation tank, the sedimentation tank is connected by a gas discharge pipe to the portion of the lower pressure than the pressure in the sedimentation tank of a gas-phase circulation system for circulating the gas ...

Shrinkage-reducing agent intended as additive in aqueous cement comprising compositions. The agent comprises at least one acetal, preferably a cyclic formal, of a tri- or polyhydric alcohol, which acetal comprises at least one 1,3-dioxa group. The acetal has preferably a water solubility of at least 1%. The agent can, in addition to said acetal, comprise at least one amorphous silica, preferably a...

Shrinkage-reducing agent intended as additive in aqueous cement comprising compositions. The agent comprises at least one acetal, preferably a cyclic formal, of a tri- or polyhydric alcohol, which acetal comprises at least one 1,3-dioxa group. The acetal has preferably a water solubility of at least 1%. The agent can, in addition to said acetal, comprise at least one amorphous silica, preferably a...

FIELD: polymer materials. SUBSTANCE: composition is suitable to fabricate pressed facing slabs used for protection against gamma-emission. Solution contains, wt.-%: epoxy resin 3.93-4.20; polyethylenepolyamine, 0.79-0.84; varnish, 0.20-0.21; mineral filler, 86.44-92.44; and alloying additive, 2.31- 8.64. EFFECT: increased average density and radiation-protection capacity. 2 tbl

FIELD: mechanical engineering; application of liquid onto surface. SUBSTANCE: method comes to application of polyurethane forming reaction mixture in the form of screw coils onto body by means of nozzle. Slot head is used as nozzle which is installed at an acute angle parallel to axis of rotation. Relative movement between rotating body and slot head and reaction speed of reaction mixture are matc...

FIELD: manufacture of building materials. SUBSTANCE: additive contains, wt %: sodium nitrate, 213.3-25.5; sodium carbonate, 26.7-28.0; sodium sulfate, 30.0-33.0; calcium chloride, 2.5-3.3; calcium carbide, 8.5-13.3; calcium hydroxide, 2.5-3.3. characteristics of concrete with additive: compression strength at 28-day age 58 MPa, rupture strength 7.2 MPa, water impermeability 16 atm, frost resistanc...

FIELD: polymer production. SUBSTANCE: method is accomplished by using dependence of polymerization degree on parameters of free- radical polymerization and controlling concentration of initiator with regard to monomer and in dependence of time. Narrow molecular- weight distribution is ensured to achieve nearly constant polymerization degree. Method is also applicable in half-periodical and half-co...

An improved, coated microwaveable paperboard or container useful for forming substantially rigid food containers such as plates, bowls, trays and the like an d a process from producing the improved, coated paperboard is provided. The microwaveable paperboard and food containers. at a temperature in excess of 430.degree.F evolv es less than 0.1 milligrams of benzene per square inch, preferably less...

Various embodiments of a saddle type vehicle are described. Configurations are shown in which the engine is located more towards the rear of the vehicle and in which the fuel tank extends generally vertically beneath the steering member. A radiator may also be located at a rear portion of the vehicle, rearwardly of the engine. A front storage compartment is also provided in the front portion of th...

FIELD: mechanical engineering; materials handling facilities; belt conveyors. SUBSTANCE: cleaning member 4 to be installed on holder 3 of scraping device 1 on discharge end of belt conveyor 2 has cleaning plate 8 secured on upper end of plate support 9, torsion spring hinge joint on which plate support is installed for turning around horizontal axle and is loaded by spring, base 6 for holding tors...

FIELD: cooling agents. SUBSTANCE: invention relates to a mixed gaseous cooling agent. Refrigerant composition consists of a mixture of the following components, mole%: tetrafluoroethane (R-134a), 43-83; monochlorotetrafluoroethane (R-124), 10-15; n-butane, 4-11. Composition can contain additionally: SF6, R-125, propane, R-218, R-318, R-123, R-142b, R-152a. Method involves compressing and ...