Abstract: Push-button movable in a casing for switching an electric circuit and comprising magnetic return means and contact elements carried by the casing, said contact elements being electric or electronic components adapted to pass individually from a first conducting state to a second conducting state when the push-button is moved from a first position to a second position within the casing.

Abstract: A hose pump comprising a number of movable pressure elements composed of a first pressure device and a second pressure device. The first pressure device is constituted by an element which is movable to-and-fro with respect to a counter pressure surface and the second pressure device contains elements movable to-and-fro with respect to a hose. The pressure devices are arranged next to one another and are driven by a common drive, in order to rhythmically compress the hose within two neighboring regions. The drive comprises cam discs structured to correspond to the number of pressure elements, the apex of crown points of the cam discs being mutually offset with respect to one another, in order to rhythmically compress the hose which is placed in the hose pump, and thus, to convey the medium which is to be pumped.

Abstract: A method of manufacture of abrasive tools having a metal galvanic binding material consists in coating the surface of the tool in an electroplating bath with a coat of a metal binding material together with particles of an abrasive material, and during electrolytic application of a coat of metal binding material the sizes of particles of the abrasive material are reduced by at least one, and preferably two, orders of magnitude in relation to the initial abrasive material.

Abstract: The invention relates to a device for the televisual inspection of the inner surface of a closed cylindrical vessel having a vertical axis and having an access hole in its upper part. The device comprises a television camera and at least one floodlight for lighting the area to be inspected. The camera is suspended from a flexible tube which is rigid under torsion and through the inside of which pass electricity supply cables for the camera and the floodlight. The flexible tube is guided and orientated over its path from the outside into the interior of the vessel by a rigid tubular guide, and means are provided for causing the flexible tube to rotate about its axis, for releasably holding the tube and the camera against axial movement, for precisely identifying angular and vertical positions of the camera, and for centering the camera in the vessel.The device is particularly applicable to the inspection of pressurizers of a pressurized water nuclear reactor.

Abstract: The present invention relates to optical fibres with a protective covering for use in cables. The fibre is protected by a covering of plastic material extruded from an extruder the punch of which protrudes 0.5 to 1 mm beyond the draw plate, and rapidly cooled at the outlet of the draw plate, so that it surrounds the optical fibre with a clearance between 1 and 10 microns.

Abstract: A photometric system for use in an image pick-up device is disclosed. The photometric system comprises the steps of forming an image focussed by a camera lens system on a light receiver consisting of a plurality of charge transfer elements arranged in a picture element array; selectively deriving luminance signals of amplitude having a value within a range of about .+-.2 exposure values around a reference exposure value corresponding to a mean value between a maximum value and a minimum value of the amplitude of the luminance signals; and seeking a mean value of the selected luminance signals to photometrically measure the light of automatically selected portions on the average.

Abstract: A craft or boat of the type comprising two hulls and joined by a bridge deck is disclosed. Highly efficient hull design is defined by specific relationships along the waterline length, maximum bulge of each hull, the distance between the hulls at the location of the bulge, the distance from the bow to the location of minimum distance between the hulls and the immersed depth of each hull. Non-symmetrical hulls, about their respective longitudinal axis, are also disclosed.

Abstract: An optical information reading-out apparatus which makes use of a focusing and tracking mechanism including first and second leaf springs for connecting an objective lens supporting body to first and second supporting members, respectively, and adapted to be moved in tracking and focusing directions when subjected to a magnetic force or to the action of piezoelectric elements.

Abstract: A nuclear reactor fuel assembly comprises a bundle of parallel rods which are transversely spaced by cross-pieces, and is supported by support tubes which extend between, and are fixed at their ends to, two grids. The grids have cells which are aligned with the fuel rods and through which the fuel rods can be withdrawn. The grids are detachably connected to end plates by sockets which are removably engaged in the end plates and cells of the grids.

Abstract: In a drive for driving front wheels through transmissions disposed at the ends of front axles to be drivingly rotated, a cylindrical front axle case for enveloping and rotatably supporting the front axles is integrally formed with transmission cases for enveloping and rotatably supporting the transmissions.

Abstract: The dian is prepared by the condensation of phenol with acetone in the presence of acid ion-exchange catalyst of the type of sulfonated co-polymer of styrene and divinylbenzene. The three-stage process is conducted in two reactors packed with a stationary catalyst bed. In each of the reactors the bed height is 5-20 m and in addition, in both reactors the beds are divided into bottom and upper zones.At various stages of the process, a reaction mixture is circulated with a different linear velocity, the first step of the process being conducted at a temperature of 60.degree.-85.degree. C. in the bed of the first reactor, in succession in the bottom and then upper zone of the catalytic bed; the second stage of the process is accomplished in the bottom zone of the second reactor at a temperature of 70.degree.-90.degree. C.; and the third step is carried out in the upper zone of the second reactor at a temperature of 75.degree.-95.degree. C.

Abstract: The device includes in a rotary cylindrical drum (1) a zone for transfer and heating (11) where the inner surface of the drum (1) is fitted with sections of blades (17) wound in a spiral across the drum (1). These blades (17) arranged projecting with respect to the inner surface of the drum (1), by their edges remote from the drum support baffleplates (18) in a longitudinal direction. The drum (1) likewise exhibits an isolation and drying zone (12) where the inner surface of the drum (1) is fitted with lifter devices (20-21) having a high retention capacity for lifting materials (25) up to the upper portion of the drum (1) and the formation by falling back of these materials (25) of a continuous screen isolating the flame (5) of the burner (4) from the next zone of the drum (1).

Abstract: A lead storage cell comprises a storage jar, an electrolyte contained in the storage jar, negative and positive electrodes within the electrolyte and respectively having a negative electrode metal or active material and a positive electrode active material which are placed in contact with each other preferably a large-meshed woven or non-woven fabric having resistance to the electrolyte and inserted between the negative and positive electrodes.

Abstract: An apparatus for automatically packing record discs comprises a record disc table adapted to receive thereon a record disc to be packed, an inner bag stock section disposed opposite the table and stocking therein a number of inner bags in stacked arrangement, a mechanism for holding the inner bag with its unsealed edge open, which mechanism comprises a pair of arm members adapted to enter at the uppermost inner bag in the inner bag stock section through the unsealed edge thereof and to support the inner bag at the opposite ends of the unsealed edge thereof, and a mechanism for moving the holding mechanism together with the inner bag toward the table. The moving mechanism draws the inner bag over the record disc on the table and in this way the record disc is in effect inserted into the inner bag to obtain a packed record disc while the record disc remains stationary on the table. The resulting package is thereafter inserted into an empty jacket.

Abstract: Newly hatched fowl are inoculated intra-cloacally with an anticoccidial effective amount of sporozoities of eimeria tenella to prevent fowl coccidiosis caused by eimeria tenella.

Abstract: A spinning machine is disclosed, which generally comprises a spinning rotor having a frusto-connical fiber sliding surface consisting of a first fiber sliding portion, onto which discrete fibers are first supplied, and a second fiber sliding portion connected to the first fiber sliding portion, a bottom surface, and a fiber collecting groove formed between the second fiber sliding portion and the bottom surface. The spinning machine further comprises a yarn take-up tube centrally extending into the spinning rotor to take up a spun yarn therethrough.The first fiber sliding portion forms an angle (.alpha.) with a plane of rotation of the spinning rotor larger than an angle (.beta.) formed by the second fiber sliding portion with respect to the same plane. The bottom surface of the spinning rotor includes a fiber guide portion, which forms the fiber collecting groove in cooperation with the second fiber sliding portion and is inclined at an angle (.delta.) with respect to the plane of rotation. This angle (.

Abstract: An improved power steering device which has a pinion shaft connected with a steering wheel, a rack rod which is connected with steerable wheels and whose rack is in mesh with the pinion of the pinion shaft in the gear box, a power cylinder for hydraulically actuating the rack rod, and a changeover valve for selectively connecting the first and second hydraulic chambers of the power cylinder with the hydraulic pressure source and the oil reservoir. The pinion shaft is rotatably supported in the oscillating cage which is rotatably mounted on the gear box in a manner such that the axis of the oscillating cage is offset a certain distance from the axis of the pinion shaft, whereby the oscillating cage rotates about its axis when the steering torque is applied to the pinion shaft. The oscillating cage is connected with the changeover valve so that the latter is actuated by the rotary movement of the oscillating cage.

Abstract: In a process for running a nuclear reactor cooled with light water, by displacing control rods and modifying the physical and/or chemical state of the coolant, the value of the running parameters of the reactor are continuously measured and recorded and the parameters describing the state of the reactor core are calculated for each substantial modification of the running parameters. The parameters describing the state of the core are measured at defined intervals of time and the calculated parameters are replaced by the measure parameters. The modified parameters resulting from predetermined sequences of action taken on the control rods or the coolant, and the action which must be taken on the running parameters in order to comply with a given program, are calculated by way of predictions. Action is taken on the control rods and the coolant in accordance with the results of the calculation.

Abstract: A frame construction for an illuminated sign comprises a metal sheathing on both top and bottom frame members of the frame, the sheathing being bent at its longitudinal edges to form longitudinally extending grooves, wherein both the top and the bottom frame members having longitudinally extending flanges inserted in the sheathing, while the longitudinal grooves of the sheathing are employed for mounting partly translucent front sheets, end frame members of the frame including tongues extending perpendicular thereto which are insertable into cavities formed by the longitudinal bent portions of the sheathing.