Abstract: A sharpening device for steel edge strips on skis which comprises a generally straight file blade and a holder for bending this blade, to limit its cutting action to a few teeth at a time.

Abstract: A direct current regulator between a direct current power supply source and a load circuit includes a main thyristor and a quenching thyristor connected in parallel with the main thyristor through a series connection of a quenching condenser and inductive reactance. A change-over thyristor is connected into the circuit of the quenching thyristor, another thyristor is provided for recharging the condenser and a control unit is provided for gating the various thyristors to set their required ignition periods. The main thyristor connected in the lines leading from the voltage source to the load circuit is relieved of the charging as well as the change-over function by the use of additional thyristors, thus attaining a wider range of adjustment for the output voltage, and only one reactor component is required for the thyristor-controlled quenching and change-over circuits.

Abstract: A stator conductor terminal assembly is located in a casing attached to the underside of the housing of a three-phase turbogenerator for leading out the phase windings of the stator coil heads. The assembly includes three liquid-cooled hollow conductors connected respectively at one end to corresponding hollow switching leads, the conductors extending from the switching leads in a first section vertically downward, thence in a second section directed horizontally for different distances, and then vertically downward in a third section through an elastic support carried by an insulating plate. The third sections of the hollow conductors pass outward through the bottom of the casing and terminate in polygon-shaped connection terminals. The casing also includes current transformers located below the insulating plate between the third sections of the hollow conductors.

Abstract: A thermal turbomachine such as an axial flow steam turbine of the center intake opposite flow type includes an intake duct surrounding the rotor and which is delimited by a portion of the internal surface of an inner housing surrounding the rotor and by the juxtaposed surfaces of two rotationally symmetrical shells. In order to permit the shells to expand substantially unhindered in relation to the inner housing as a result of imposed thermal stresses and still provide a gastight seal between an internal surface portion of the inner housing and the peripheral portions of the shells the latter are pressed into a slidable sealing engagement with the former rather than rigidly attached to each other. According to one embodiment, the slidable sealing engagement between the parts is established by means of a groove provided on one part into which the other part is fitted.

Abstract: In a packing container of the type comprising two sealing joints crossing each other whereby a sealing joint forms a sealing fin in which the packaging material is joined inside to outside, a ripping strip or thread is provided adjacent the inside of the sealing fin and with a portion thereof accessible from the exterior of the container.

Abstract: A synchronous motor incorporates a rotor structure having solid poles. In order to improve the starting characteristic of the motor and protect the pole claws against burning, conductive bars are arranged at each side of the pole below the pole shoe and are electrically connected with the pole to form a quadrature-winding which provides a conductive path for currents induced at the pole surfaces by the time-variable quadrature-field and causes such currents to close around the quadrature-field thereby eliminating current from pole-to-pole by way of the claws. The quadrature-winding also forms a circuit parallel to the solid pole surfaces which thereby improves the asynchronous torque characteristics at low slip rates and reduces the oscillating torque.

Abstract: A speed change gear system of the planetary gear type suited for applications within fluid couplings used upon automobiles includes three simple planetary gear sets of the single pinion type and the double pinion type, two clutch units, and three brake units. The movable members of the three planetary gear sets are suitably coupled to each other, and the brake units are suitably locked and unlocked so as to attain the desired speed ranges, that is, at least four forward drive speeds and at least one reverse drive speed.

Abstract: A speed change gear system of the planetary gear type suited for applications within fluid couplings used upon automobiles includes three simple planetary gear sets of the single pinion type and the double pinion type, three clutch units, and at least two brake units. The movable members of the three planetary gear sets are suitably coupled to each other, and the brake units are suitably locked and unlocked so as to attain the desired speed ranges, that is, at least four forward drive speeds and at least one reverse drive speed.

Abstract: A polyphase stator winding for three or more phase pole-changeable synchronous machines includes rod-type windings which are encased within each other in a multi-layer arrangement in the stator slots. The winding arrangement will permit for any pole-number pairings occurring in practice an additional degree of free-choice in the selection of the number of poles or speeds, respectively that can be paired with each other, and of the winding pitches and spread values which are advantageous in relation to harmonics content, and in relation to the spread factor and consequently the winding factor as well as with respect to losses. The arrangement of the windings is characterized by selecting, for the two windings, winding pitches which differ from one another by an integer and even constant C expressed by the relation C = w.sub.1 - w.sub.2 where (in the case of wave type windings) the constant C takes values .+-.2, .+-.4, .+-.

Abstract: This invention relates to a sodium sulfur storage battery including sulfur as a cathodic reactant, sodium as an anodic reactant and a non-porous solid electrolyte, the storage battery having a partition means in a chamber of sodium. According to this invention, even if a part of the solid electrolyte is broken, direct reaction between the both reactants is controlled in a smaller scale thus preventing the spread of electrolyte deterioration.

Abstract: The brake shoe of the present invention comprises a wear brake shoe body against which there has been cast a layer of metal consisting of hardenable material. By making the casting sufficiently thick the wear layer is prevented from losing its surface hardness.

Abstract: A lining element for pulp refiners is made by casting from a steel alloy containing from 1.0 to 5 percent by weight of titanium present as titanium carbide grains having an average size of 10 microns or less and being uniformly distributed throughout the lining element. The titanium carbide prevents polishing of the working faces of the lining element.

Abstract: An electric switch having a case, an actuator and a converter. The actuator and converter are coaxially connected, and below the actuator there is mounted an indicating member with a surface bearing a pre-determined indication, which surface moves in the reverse direction to the formerly-named members relative to the switch.

Abstract: This invention relates to a novel sodium-sulfur storage battery comprising a sodium reservoir made of metal incorporating a heater between double walls, a solid electrolyte connected thereto, an anodic reactant contained therein and a cathode reactant contained thereout, and a battery housing which contains the above-mentioned components and being sealed at the upper part thereof. According to this invention, a sodium-sulfur storage battery having superior performance, longer service life, and of low price is obtainable.

Abstract: The invention relates to a drill bit for use in percussion drilling. The drill bit has a solid bit body, has cutting members on its face and a centrally disposed rod-receiving hole in its rear portion. The hole has, in part, a conical internal surface and a cylindrical internal surface in front of said conical internal surface. Said cylindrical internal surface is provided with an internal thread at a distance remote from the bottom of the hole. A cooperating drill rod has a forwardly tapering portion with a conical exterior face complementary to the conical interior surface in the hole of the drill bit and an external thread on its forepart.

Abstract: Finely disintegrated and fluffed cellulose pulp, at a consistency of 25-35%, is introduced into the top of a reaction tower and countercurrently bleached with oxygen gas, introduced into the lower portion of the tower, at a temperature of 80.degree.-120.degree. C. The pulp is maintained in the tower as a gas permeable column having a maximum height, in meters, equal to five tenths of the pulp consistency.

Abstract: A disc brake for vehicles comprising friction pads adapted to be urged by hydraulic actuator into engagement with opposite faces of a friction disc, the hydraulic actuator having a sliding fit on a stationary part of a vehicle wheel and straddling a peripheral portion of the brake disc together with the pads. The hydraulic actuator is slidingly supported on a pair of parallel guiding pins one of which directly extends from the stationary part while the other pin is removably secured to the stationary part with a sufficient clearance to secure a tolerance extinguishing-ability for the guiding pins and their associated parts.

Abstract: A compressed gas electrical switch wherein the switching point, i.e. the contact actuating mechanism is operated by means including a pivotally mounted lever which is introduced into the pressure-gas filled switch housing. For sealing the lever at the point of entry into the switch housing, the lever is surrounded partially by a sleeve connected to it and which is provided at the entry point with a spherically shaped zone. A highly elastic sealing gasket rests upon the outer surface of the sleeve, one end of the gasket including a connected flange at one end situated on the spherically shaped zone of the sleeve, and the other end of the gasket being secured to the end of the sleeve within a disc-shaped part connected in a gas-tight manner to the lever.

Abstract: Apparatus for intermittently turning a turbine shaft wherein a ratchet wheel is secured upon the shaft and is engaged intermittently by a to and fro movement of a ratchet arm actuated by a reciprocating drive mechanism. The ratchet arm has a combined rectilinear and pivotal movement and is provided with a device, operable in the event the ratchet wheel is put into rotation by starting up of the turbine while the ratchet arm is engaged with the ratchet wheel, for detaining the arm against a return pivotal movement towards the ratchet wheel after being hurled outwardly therefrom to a predetermined position.

Abstract: An energy transmission system includes a high-voltage direct-current transmission main in the form of a ring for supplying consumers located within the ring. The high-voltage d.c. main is fed from a three-phase network through rectifiers, and power output groups located at a plurality of points within the ring are connected to the latter. Each power group consists of a plurality of partial inverters connected in series between the poles of the d.c. main and an alternating current consumer network to be supplied is connected to the output of the inverters. Each output group of inverters includes a regulating device to monitor and regulate current and voltage to pre-set values dependent upon the power requirement of the inverter group such that one inverter of a group regulates the common direct-current applied to the output group and the other inverters of the group regulate their direct voltage so that the resulting sum voltage is equal to the amplitude of the direct voltage of the common main.