Abstract: A direction setting device for rollers of a baby walker includes a pair of upper connectors, a pair of lower connectors rotatably connected to the upper connectors, and a control mechanism for permitting or preventing the relative rotation between the upper connectors and the lower connectors. The upper and lower connectors are utilized to connect the seat to the front rollers on the baby walker. Each of the upper connectors includes a spring biased key member. Each of the lower connectors includes a circumferential contacting surface capable of engagement with the key member and a key way in the contacting surface capable of engagement with the key member to prevent the relative rotation between the upper and lower connectors.

Abstract: The arrangement comprises an external supply unit that feeds into two flexible conductors (5, 5') a variable d.c. voltage (V.sub.A) superposed on a modulated high frequency voltage (V.sub.C), the modulation being dependent on the position of a switch. The arrangement further comprises, inside a handpiece, means (20, 21) connected to the conductors for receiving therefrom and separating the two voltages, means (23, 25, 26, 27, 28, 29) for feeding a supply voltage (V.sub.D) to the circuits of the handpiece, means (30, 31, 33, 34) for demodulating the high frequency voltage and for generating a logic signal (S.sub.L) representative of the position of the switch, a three-phase motor, sensors (A, A', A") controlled by the motor, an inverting circuit (41) receiving the logic signal, a control circuit (50), and a drive circuit (60) issuing a three-phase signal (S.sub.M, S'.sub.M, S".sub.M) to the terminals (X, X', X") of the motor.The speed of the motor is determined by the d.c.

Abstract: The invention provides a piston and cylinder unit whose piston rod is sealed by a supporting and sealing arrangement arranged in an end cap of the unit. This supporting and sealing arrangement comprises a sealing portion made integrally with a stripper portion and joined therewith to form a sleeve-like sealing member surrounding the piston rod having the said portions at its ends. A lubricant-permeable supporting bushing encompassing the piston rod is mounted in the sealing member between the sealing and stripper portions and receives lubricant from lubricant reservoirs in the part of the sealing member between the stripper and sealing portions.

Abstract: The present invention relates to a baby's walker with height adjustment apparatus which includes a seat; a slidable base; two U-shaped tubes pivotally connected to each other in crosswise arrangement and disposed between said seat and said slidable base, said U-shaped tubes each having a central portion and ends opposite said central portion, said ends being pivotally connected to said slidable base, said central portion of one of said U-shaped tubes being pivotally connected to one side of said seat, said central portion of the other of said U-shaped tubes being movably engaged to the underside of the opposite side of said seat; two plates secured on said underside of the opposite side of said seat in a parallel arrangement, which each plate having an indented portion formed at its underside; two sliding members provided on said movable central portion with a rectangular opening, and slidably engaged with said plates respectively; a controlling member pivotally connected with said movable central portion wit

Abstract: A method of manufacturing bellows members composed of stacks of annular elements which are joined together by weld seams produced alternately at inner and outer edges of the elements. In the invention at least some of the annular elements of a bellows member are mounted on a rotating fixture for welding the seams by a beam welder. During the production on one such seam the beam welding device is held stationary in relation to the elements.

Abstract: A cathode-ray tube is coated on the inner surface with a coating material which contains, in a weight ratio based on solid, 10 to 22% of graphite, 30 to 50% of a metal oxide, 2 to 9% of a surface treating agent and 25 to 42% of water glass, and in which at least 18% of graphite powders in its simplest form suspended in said coating material have a particle size of at least 1 micron.

Abstract: The spraying equipment is arranged at a station provided with means for opening and closing the die, e.g. at a preheating station of a plastic injection molding installation. The equipment comprises a spray arm with nozzles, movable, e.g. hydraulically in horizontal and vertical directions, which arm is connected to a spray medium supply. This supply as well as the drive of the spray arm, is automatically controlled via the computer of the injection molding installation in such a way that with the die open, the spray arm is automatically moved into operating position between the die parts and is manufactured in accordance with the tool data picked up by the computer. After completion of the spraying the arm is retracted into an inoperative position outside the die. Operating personnel is superfluous.

Abstract: To reduce the engineering and operating costs, particularly to save a radiation source and minimize the space requirement of the illuminating device for the automatic reading of markings that are optically recognizable on a carrier, e.g. alphanumeric symbols on shipments such as letters, postcards, check cards, vouchers and the like, the light flux of a radiation source is utilized better by an additional, simple and inexpensive arrangement consisting of two mirrors. These mirrors are disposed around the radiation source and the radiation source generates two radiation beams which are sent on their way to the carrier to be illuminized first through a condenser system and are then redirected by reflectors in such a manner that the angle of incidence alpha of their beam axes to the carrier surface is essentially the same and that, after focusing the radiation beams, both illuminate the same partial area of the carrier.

Abstract: Described is a method of controlling the mold filling process of a plastics injection molding wherein, for the purposes of avoiding fluctuations in the mass of the moldings, due to material not being of a uniform quality, the change-over point between the filling phase and the back-pressure phase is shifted by a predetermined value in dependence on the injection work which is detected during the filling phase.

Abstract: An electrically controlled valve apparatus includes an inlet conduit (2) for pressurized fluid, an outlet conduit (12) connected to a tank (T) and an outlet conduit (19) connected to an actuator, or cylinder (5). The valve apparatus comprises a chamber (5) connected to the inlet conduit (2) and provided with two openings (10, 11) each having operating spindles (6, 7). Pressurized fluid flows from the chamber (5) through the two openings via the outlet conduits (12, 19) onto the cylinder and into the tank, or from the cylinder into the tank according to the position of the operating spindles. The valve apparatus also comprises two throttle valves (42) for constricting conduits (52, 53; 40, 45) located between the back chambers (31, 24) of the operating spindles (6, 7) and the fluid tank (T). The operation of the throttle valves is adjusted by means of one or several electric actuators (55).

Abstract: The invention relates to a piston and cylinder unit in which there are means for precluding twisting of the piston rod in relation to the cylinder. A part of the piston rod outside the cylinder is connected with a support member which surrounds a major part of the circumference of the cylinder in every position of the piston rod. On both sides of the median plane containing the longitudinal axis of the cylinder there are respective support section having sliding and support surfaces. These sliding and support surfaces face in opposite directions about the axis of the cylinder and each run on a flat runner surface, also extending in the length direction of the cylinder, on a base which is not able to turn or otherwise move in relation to the cylinder.

Abstract: Conventional black coatings for objects of common use usually formed as a carbon layer or porous metal layers, have a deficient wear resistance and surface quality. The resistant high gloss black coatings according to the invention comprise oxycarbonitrides, the proportion of carbon. Preferably the layer comprises an oxycarbonitride of an alloy of Ti, Zr and Hf, the oxygen component between 40 and 60 atom percent. Use of the invention is mainly for decorative utility objects, e.g. watch cases.

Abstract: A vibration-damping device for miniature motor brushgear comprising brush arms having sliding parts at the tips of a plurality of fork-like prongs, terminals and brush bases; the brush bases are supported by a motor case cover and the brush arm sliding parts make sliding contact with a motor commutator by the resiliency of the brush arm in which a soft photo-setting resin is applied on areas at the tips of the brush arms, other than the sliding parts, in such a manner that the fork-like prongs and/or gaps between the prongs are covered by the soft photo-setting resin. The fork-like prongs are individually and separately movable by controlling the flexibility of the soft photo-setting resin, by setting the coating weight or hardness after cure of the soft photo-setting resin to a predetermined value, or by applying soft photo-setting resin having different hardness values in multiple layers.

Abstract: A hexakisazo dye suitable for dyeing cellulose, natural or synthetic polyamide meterials, leather, represented by the formula ##STR1## wherein X is --CH.dbd.CH--, --CONH--, --CRH-- (wherein R is phenyl which is unsubstituted or substituted by H or a sulfonic acid group), -SO.sub.2 -- or --O--; Y is H, CH.sub.3 OCH.sub.3, Cl or SO.sub.3 M; A.sub.1 and A.sub.2 are each ##STR2## (wherein Z.sub.1 is H, Cl, CH.sub.3, OH, OCH.sub.3, OC.sub.2 H.sub.5 or SO.sub.3 M, and Z.sub.2 is H, CH.sub.3, NO.sub.2 or COOM); B.sub.1 and B.sub.2 are each ##STR3## (wherein Z.sub.3 is H, OH, NH.sub.2 Cl or COOM, Z.sub.4 is H, Cl, CH.sub.3, OH OCH.sub.3, NH.sub.2, COOM or SO.sub.3 M, and Z.sub.5 is H, C.sub.1 -C.sub.4 alkyl or OH); M is H, Na, K, Li or NH.sub.4 ; f is 0 or 1; m is 0, 1 or 2; and n is 0, 1 or 2.

Abstract: A spindle which is rotatably mounted in a box-like housing rotatably carries a tube. A spring is connected between the tube and spindle to exert a biasing rolling force on the tube. A stop member holds the spindle fixed with respect to the housing to permit rolling of the tube. An upper edge of a mesh screen is fixed to the tube so that the screen can be rolled up on the tube. Lateral channel shaped guide members extend downwardly from the housing and guide edges of the screen. A fastening member is connected to a lower edge of the screen and includes moveably mounted pins which are engageable into recesses in the guide members to hold the fastening member down and cover an area with the screen. The housing can be mounted over a window or door so that the screen can be pulled down over the opening of the window or door.

Abstract: This invention relates to a process for readily and efficiently preparing L-rhamnose with the use of a marine alga belonging to the family Monostromaceae, Ulvales.According to the process of the present invention, rhamnan sulfate is extracted from a marine alga belonging to the family Monostromaceae such as Monostroma nitidium Wittrock and the obtained extract is hydrolyzed by adding acid(s) thereto followed by heating or treating thereof with a cation exchange resin followed by heating to thereby give a solution containing free L-rhamnose.Since the solution thus obtained contains a large amount of salts, the removal of these salts is significantly important in the preparation of L-rhamnose. In the present invention, an effective process therefor is combined with a conventional method by using an ion exchange resin to thereby establish an efficient desalting process.

Abstract: An inflatable pool comprises a base sheet and a hollow inflatable wall having its bottom end heat sealed to the edge of the base sheet. The wall includes a pair of first sheets sealed together at first seal seams forming a plurality of compartments, and a pair of second sheets sealed to the compartments at second seal means and also the top edges of the second sheets are sealed together forming the envelope of the wall. The construction of the wall of the inflatable pool is stronger and stiffer and the outer surfaces of the wall are flatter and smoother than that of conventional inflatable pools.

Abstract: The invention relates to a transport device for welding wire feed for welding equipment, in particular arc sheild-gas welding tools on manipulators. The welding wire is transported from a magazine or reel with the aid of two separate drives. The main drive determines the feed and it is mounted near the application welding die, while the auxiliary is arranged spaced therebehind. The motor of the main drive is controlled to a constant speed corresponding to the selected feed, while the auxiliary drive acts on the welding wire with slip. The motor of the auxiliary drive is also controlled to a constant speed, the speed adjustment of the drives being, however, control-technologically connected for maintenance of a certain difference of the transport speeds.

Abstract: Part of the synthesis gas produced by coal gasification in an allothermically heated fluidized bed reactor is burned after removal of dust and sulfur and serves as a source of energy to heat the reactor by indirect heat exchange and to produce the steam required for the gasification process. The flue gas exiting from the heat exchanger of the reactor can be used to perform work in expansion turbines. The rest of the synthesis gas is available for use in downstream processes, such as iron ore reduction, or can be burned and used to perform work in turbines to produce electric current. The result is a process that is environmentally safer and operates with a better yield than direct coal burning or autothermal coal gasification, but requires no outside source of energy, such as nuclear power, as prior art allothermal coal gasification processes do.

Abstract: A protective breathing mask, in addition to having a speaking diaphragm for close communication is equipped with an electroacoustic transducer system for indirect speech transmission from inside the mask. In order to achieve high transmission quality for human speech with a simple apparatus without the occurrence of interference noise, it is provided that the sound output channel is closed on the mask side by an auxiliary diaphragm which is acoustically coupled with the speaking diaphragm via a secondary air chamber, and is also mechanically connected directly or indirectly with a movable element of the electroacoustic transducer system.