Abstract: The invention relates to a treatment element which is used to receive dental hand instruments. Said treatment element comprises a base part (1) which is provided with connections (2; 39) and which is used to accommodate the instruments, and a instrument storage place (5; 15). Said treatment element comprises an exchangeable upper part (4; 12).

Abstract: The invention relates to a treatment element which is used to receive dental hand instruments. Said treatment element comprises a base part (1) which is provided with connections (2; 39) and which is used to accommodate the instruments, and a instrument storage place (5; 15). Said treatment element comprises an exchangeable upper part (4; 12).

Abstract: A dental device having at least one pneumatically operable handpiece, the rotational speed of which can be influenced by a control element designed as a foot-operated switch, and a further handpiece, which can be driven by means of an electric drive, and the compressed air present at the pneumatic handpiece influences the control of the electric drive. A graduated filter is mounted on a pneumatically actuated hollow body and the graduated filter has regions thereon which can be sensed by a light barrier generating an electric signal in dependence on the properties of the regions.

Abstract: A roller for the treatment of fiber masses for the textile industry has a sawtooth wire received in a rectangular cross section helical groove of a steel roll body and indented by a peening or indenting roller to provide, by plastic deformation of the foot portion, the outward forces which clamp the foot portion of the wire against the ribs flanking the groove of the roller body. As a consequence, the roller body as a whole is not deformed.

Abstract: Apparatus gathering writing pads into stacks has a row of receptacles disposed at a level below the discharge end of a feeding conveyor which delivers several lines of pads, one for each receptacle. The receptacles have a common horizontal floor assembled of spaced-apart elongated strips mounted in a main frame and extending in the longitudinal direction of the row, and the receptacles are separated from each other by separating units having sets of upright rods which extend upwardly through the spaces between the neighboring strips and can be lowered to move out of the way preparatory to removal of assembled stacks of pads by two endless conveyor belts which flank the row of receptacles and have inner reaches movable into engagement with the respective sides of the stacks. The conveyor belts are set in motion after their inner reaches engage the stacks and after the rods are retracted to a level below the floor.

Abstract: A chassis for a self-propelled agricultural machine adapted to travel in a predetermined longitudinal horizontal direction basically comprises a lower frame, a middle frame spaced above the lower frame and offset somewhat therefrom, and an upper frame spaced above the middle frame and offset horizontally therefrom. The lower frame has a pair of longitudinally extending rigid lower side beams having outwardly offset rear ends and a plurality of longitudinally spaced and transversely extending lower cross beams fixed to and bridging the lower side beams.

Abstract: A device for balancing rotating bodies comprising two inertia masses, which are disposed in a cylindrical housing which can be connected to the body to be balanced such as a grinding disc, and which are mutually connected by means of a self-locking worm gear. The inertia masses may be displaced by means of one single switch shaft having four positions in which the two inertia masses can be displaced either countercurrently in both directions or concurrently. When braking is effected by means of a brake knob disposed on the switch shaft, displacement occurs until the indicated imbalance lies within the low, desirable range. The worm shaft and the worm wheel contained in the inertia masses are in engagement with the worm gear of the switch shaft and the housing.An arrangement of this type permits, on the one hand, a simple mechanical construction and operation, and, on the other hand, a large inertia mass, relative to the volume available, with a wide range of adjustment.

Abstract: Apparatus gathering writing pads into stacks has a row of receptacles disposed at a level below the discharge end of a feeding conveyor which delivers several lines of pads, one for each receptacle. The receptacles have a common horizontal floor assembled of spaced-apart elongated strips mounted in a main frame and extending in the longitudinal direction of the row, and the receptacles are separated from each other by separating units having sets of upright rods which extend upwardly through the spaces between the neighboring strips and can be lowered to move out of the way preparatory to removal of assembled stacks of pads by two endless conveyor belts which flank the row of receptacles and have inner reaches movable into engagement with the respective sides of the stacks. The conveyor belts are set in motion after their inner reaches engage the stacks and after the rods are retracted to a level below the floor.

Abstract: An open-end spinning apparatus with a spinning rotor having an interior wall, a yarn takeoff channel opening and a fiber feed channel opening communicating with the interior of the spinning rotor. A suction opening (5, 50, 51) is connected to a source of reduced pressure and has its open end directed to the interior wall of the spinning rotor. The suction opening is positioned so that a suction air stream flowing therethrough is separated by a screen from the yarn takeoff channel opening and the fiber feed channel opening.

Abstract: A shutter for a photographic instrument comprises a support on which more than two sectors are swingably mounted and a rectilineally shiftable actuating member connected to the sectors for swinging same from a position in which the sectors block an opening in the support into a position in which the opening is adapted to pass light.

Abstract: A device for guiding yarn as it is wound on a package from a source at a constant speed. The yarn passes over a yarn guide member which is supported on a holder. The holder is resiliently supported transversely to the direction of the yarn travel through the guide member for compensating for changes of the yarn tension during winding of the yarn onto the package.

Abstract: Absorptive substrates, such as asbestos cement, concrete plaster work, can be impregnated to lock the pores and to consolidate the substrate, especially old and weathered plaster work, with aqueous plastics dispersions, if dispersions are used which have an average particle size of about 0.02 to at most 0.1.mu.m, and preferably from 0.036 to 0.080.mu.m. As opposed to conventional dispersions with larger particle sizes, the penetration of dispersions according to the invention reaches the same values as that of the solvent-based impregnating and priming compositions hitherto used. Aqueous dispersions are easier to handle and permit relatively high solids contents at a moderate viscosity.

Abstract: The sound absorbing properties of plasters, based on synthetic resin emulsions as binders, are improved, if as binder dispersions are used the polymer content of which has a dilatometrically determined second order transition temperature of between -20.degree. C and +10.degree. C, and if the fillers consist of at least 70% of material having a grain-size of from 0.35 to 1.5 mm.