Abstract: The present invention relates to novel derivatives of 2'-deoxyuridine substituted in the 5-, 3'- or 5'-position by .alpha.-aminoacyl groups, to a process for their preparation and the drugs in which they are present.These derivatives have the following general formula: ##STR1## in which R is selected from an alkyl or alkenyl radical having from 1 to 4 carbon atoms, an aryl radical or a halogen, it being possible for said alkyl, alkenyl and aryl radicals to contain at least one halogen substituent, and a radical of the formula --NH--R.sub.1, in which R.sub.1 is an amino acid residue or a peptide residue containing from 2 to 6 amino acids; andR' and R" are selected from a hydroxyl radical and a radical of the formula --NH--R.sub.1, in which R.sub.1 is as defined above,with the proviso that R' and R" are not simultaneously --NH--R.sub.1 and that, when R is --NH--R.sub.1, R' and R" are simultaneously a hydroxyl group.Application: treatment of cancers and viral infections.

Abstract: The invention concerns a retaining device for an angled head (10, 11) that is driven by a drive (1) especially a drilling gun, in which the drive unit (1) has a receiving connector (2) to receive the angled head (10, 11). To allow adjustment of the angular position of the angled head with respect to the drive unit, a socket (31) that can be screwed onto threads (33) of the receiving connector (2) is provided to receive the angled head (10, 11). Pins (21) which can be displaced axially in order to retain or release balls (25) are provided in the socket (31). The receiving connector (2) has on its outer surface a plurality of lengthwise grooves (29) in which the balls are held (25). When the pins (21) are displaced axially the balls (25) are released, so that the socket (31) can rotate relative to the receiving connector (2) until the balls (25) engage in corresponding lengthwise grooves ( 29) and are retained by the pins.

Abstract: A compact device for clamping a disc-shaped tool on a tool spindle of a portable machine tool with a clamping anchor arranged in the tool spindle, with a clamping flange attachable to the free end of the clamping anchor, with an abutment arranged at the tool end of the tool spindle and with a manual actuating mechanism for releasably pressing the clamping flange against the abutment, thereby clamping the tool between the clamping anchor and the tool spindle. The manual actuating mechanism includes a first pressure cylinder having a first cavity and a second pressure cylinder having a second cavity, and a connecting channel between the cavities. The second pressure cylinder includes a piston delimiting the second cavity. The piston is adjustable and fixable by the manual actuating mechanism from the tool end of the tool spindle for releasably clamping the tool on the tool spindle.

Abstract: A method for determining and, when appropriate, compensating for the linear (heat) expansion of elongated bodies (1), such as physical length scales (1) or of elongated bodies which are intended to support physical length scales on, e.g., instruments or measuring machines equipped with physical length scales, in which measurement errors occur because of length deviations of the scale (1) as a result of deviations from a reference temperature at which the scale was calibrated.The method is mainly characterized by measuring the linear expansion of the body (1) in relation to at least one reference (6) made of a material whose coefficient of linear (heat) expansion (.alpha.) deviates from the coefficient of linear (heat) expansion of the body material, and thereafter determining, when appropriate, a compensation factor for correcting the body length.The invention also relates to an arrangement for carrying out the method.

Abstract: A motor-operated tool is provided for tool sockets revolving about an axis, in particular for drills or spanners. The tool comprises a tool head containing a drive spindle. The drive spindle comprises a driving opening for a drive shank of the tool socket and a plurality of ball elements for engaging a part of the drive shank to lock it in the driving opening. The ball elements preferably are adapted to lock the drive shank in the driving opening automatically and to be released by a suitable mechanism. The tool socket is designed as a drill chuck and is provided with key elements for actuating the mechanism.

Abstract: A portable grinder (10) has a motor-driven drive shaft (15) and a quick-acting chucking device for a grinding tool (43), which comprises a spindle (20), coaxial with the drive shaft (15), which is braced against the drive shaft (15) by a spring (24) in the axial direction and can be displaced in the axial direction relative to the drive shaft (15) by means of a clamping lever (32). One external free end of the spindle (20) retains the grinding tool (43), which in a released position--with the free end of the spindle (20) extended and the spring (24) tensioned--can be removed from the free end, and in a tightened position--with the free end of the spindle (20) retracted and the spring (24) partly relaxed--is non-rotatably joined to the drive shaft. The free end is configured as a bayonet end (40) which extends though the grinding tool (43). An attachment collet (41) with a bayonet opening can be placed from outside onto the bayonet end (40).

Abstract: A brush roller (1) includes a cylinder section (2) and brush elements (4) attached to it. In each element (4) the bristles (6) are attached in essentially a radial direction. The cylinder (2) of the brush roller (1) includes longitudinal rails (3), and each element (4) includes an indentation (7), which attaches the element (4) to the rail (3), and one or more elements (4) are sequentially arranged to be pushed onto each rail (3).

Abstract: An equipment for detecting the movement of a preceding vehicle and giving warning. When one's own vehicle (hereinafter referred to as "the vehicle") is at a stop, the equipment detects the forward or backward movement of said preceding vehicle and gives warning to the driver of the vehicle. The equipment comprises a distance measuring sensor for measuring the distance between the vehicle and said preceding vehicle when the vehicle is at a stop, a memory device for memorizing a value measured by said distance measuring sensor, a measurement command device for making said distance measuring sensor repeatedly measure the distance between the vehicle and said preceding vehicle, a comparison device for comparing said memorized value measured by said distance measuring sensor with values subsequently measured by said distance measuring sensor, and a warning device for giving warning when any of said values subsequently measured is different from said memorized value.

Abstract: In a "half-turn" type two-disc tap, the two discs are superposed and in contact to adjust the flow rate of a liquid. Each disc has first and second openings situated on respective sides of a predetermined diameter of the disc. The first opening is situated in the central part of the disc and the second opening is situated at the periphery of the disc so that in the closed position of the tap is openings of each disc are separated from the openings of the other disc and in the maximum open position of the tap the first and second openings are respectively and conjointly superposed over an angle just less than 360.degree..

Abstract: An improved composite plastic panel is disclosed, including a base layer comprising a thermoplastic or thermoset resin, which may be reinforced, and a protective surface layer comprising a polyurethane polymer having a glass transition temperature of at least 80.degree. C. The protective layer forms a strong polar bond with the base layer. Thus, the composite plastic panel displays high water and weather resistance and has an increased useful lifespan.

Abstract: A lapping machine having a lapping bed adapted to rotate about a main axis and having an annular lapping surface delimited by an inner circle and an outer circle and into which is cut a spiral groove. Virtually all of at least one confinement ring faces the annular surface and rotates about a fixed axis parallel to the main axis, contains parts to be lapped, and confines movement thereof against the lapping surface. An application disk coaxial with the ring presses the parts in the axial direction agains the lapping surface. The pitch of the groove is not constant whereby between the inner and outer circles, and excluding the inner and outer circles, there is a constant ratio between the pitch ratio .lambda.

Abstract: Grinding with known grinders such as corner, belt or vibratory grinders poses insoluble problems, such as the grinding of inner edges set at an angle to each other for example in retainer strips of window and door glasses. A portable grinder has thus been developed in which the grinding or sanding tool (3, 20, 30) effects an oscillatory movement which, unlike in the state of the art, is effected around a fixed axis of the apparatus (29) with a minimum pivoting angle, preferably between 0.5.degree. and with a high pivoting frequency of between ten thousand and twenty five thousand vibrations per minute. This different oscillation movement makes it possible to provide the grinding or sending tool with almost any shape. Furthermore, grinding does not inevitably have to be made with the transverse surface of the tool (3), in particular the perpendicular surface, in relation to the diametrical axis (29) but it is also possible to use a surface which is almost parallel to the first or is even arched.

Abstract: The present invention relates to the products of general formula (I): ##STR1## in which R.sub.1 and R.sub.2 are identical or different and are selected om a hydrogen atom, a halogen atom, a hydroxyl radical, an alkyl radical having from 1 to 5 (sic) carbon atoms, an alkoxy radical having from 1 to 5 carbon atoms or a phenoxy, benzyloxy, trifluoromethyl or acetyl radical.It further relates toa method of preparing said productsand the drugs in which said products are present.

Abstract: A sleeveless jacket that would be worn by the user of a chain saw. The front and shoulders of the jacket are padded with a material that jams a chain saw if it cuts into the padding to protect the user from being cut by the saw.

Abstract: The thermostat comprises a main housing (10) having a metal sheet cover (12) with a bored and threaded boss (18) and an adjustment shaft (20) threadedly engaged in said boss and entering the housing to interact with internal operative members of the thermostat. According to the invention, a plate (28) of yielding material is affixed against the inside of the metal sheet cover, said plate having a bore (30) aligned with the bored and threaded boss, of a diameter slightly less than the shaft diameter, and that the threaded end of the shaft is in interference fit with said bore.

Abstract: An elevator chair for assisting entry and exit including a vertically telescopic back frame raised and lowered by a motor driven vertical threaded screw and tube assembly. The back frame raises and lowers a rear portion of a seat and movement of the front of the seat is controlled by forward links that are positioned to raise the forward portion of the seat as the chair lifts.

Abstract: To improve a power-operated screwing tool machine comprising a drive arranged in a housing, a screwing tool and a switch-off means for the screw-in depth including a depth stop held on the housing for fixing a screw-in depth and a clutch arranged between the drive and the tool drive shaft and transferrable by axial displacement of the tool drive shaft from a position of rest in the direction of the drive into a working position, the clutch comprising a clutch element driven by the drive, a clutch element connected to the tool drive shaft and an intermediate clutch element arranged between these clutch elements, with the intermediate clutch element forming with a first one of the clutch elements an entrainment clutch and with the second clutch element a release clutch, such that in addition to a switch-off means for the screw-in depth, the screwing tool machine comprises a switch-off means for the screw-in torque, it is proposed that the switch-off means for the screw-in depth be adapted to be switched over in

Abstract: A transportable and foldable articulated bed with a non-positively driven articulated mattress platform that reduces the risk of injury and permits the bed to be folded for transport without disconnecting platform drive systems. The mattress platform is articulated on a foldable frame consisting of a head section hinged to a foot section. A pair of retractable caster assemblies can be swiveled 270 degrees from a storage position mounted on the head frame section and connected to the foot frame section with both sections aligned to a position where it can also be connected to both sections when the bed is folded so it can be rolled about.

Abstract: The present invention provides a novel process for the coextrusion of a laminate containing more than a single barrier layer. The process overcomes the interfacial instability associated with thinning and spreading a composite stream containing a barrier layer of EVOH. Furthermore, the process prevents migration of EVOH particles from regrind.