Abstract: Economical but readily workable palladium alloys for baking on dental ceramics consist of 60 to 80% palladium, 0 to 8% gold, 0 to 5% platinum, 0 to 1% ruthenium and/or rhenium, 2 to 20% copper, 1 to 12% tin and/or indium, 0.2 to 5% of at least one of the elements tungsten, molybdenum, niobium, and tantalum, and 0 to 15% cobalt, with the proviso that the sum of tin and indium must be between 5 and 14%.

Abstract: A portable compass saw which is provided with an oscillation drive for driving a saw blade. The oscillation drive includes a gear, which is mounted on a shaft in the housing; engaging in the teeth of the gear is a pinion of a drive shaft of a drive motor. At a distance from its axis of rotation, the gear is provided with a pin extending parallel thereto. The pin is in driving connection with a clutch member, which is connected to the push rod and has a guide for the bolt, with the guide extending at right angles to the longitudinal axis of the push rod. The teeth of the gear are provided on that side of the gear which faces the push rod. The pinion is located in the region between the push rod and the gear, which is seated loosely on the shaft and is held on the latter under the load of the pinion. As a result, the gear is held reliably in its installed position, even though it is seated loosely on the shaft and is not secured to prevent axial displacement by separate securing members.

Abstract: A portable compass saw having an oscillation drive for a push rod, to which a saw blade is attached. The push rod has an angular cross-section, and is guided over part of its length on all sides in a housing. Guide surfaces, themselves formed by parts of the housing, are provided for the purpose of guidance on two opposite sides of the push rod. Roller bearings extending at right angles to the stroke direction are respectively located on the two other sides of the push rod. In the region of the oscillation drive, a pressure member acts on the push rod on the opposite side. This member loads the push rod in the direction toward the oscillation drive. The push rod is consequently guided in a trouble free manner in the housing in, and at right angles to, the direction of the stroke, so that no play occurs which may impair the saw cut.

Abstract: A holder for supporting motor driven tools against the reaction torque which occurs during operation. Two supports which are spaced from one another are provided for the tool. The supports are rigidly connected with a clamping device. Since only one support is effective at any given time for a given direction of rotation of the tool, the direction of rotation of the latter can be changed without having to modify the holder. The holder, together with the clamping device, is fastened directly onto the workpiece.

Abstract: A thread cutting tool having an electric motor which is accommodated in a housing and, by means of at least one worm gearing, drives a holder ring which is rotatably mounted in a head ring. The electric motor has a speed of greater than 25,000 rpm. The worm-gear toothing of the holder ring has a modulus of less than approximately 1.6 mm. Due to the high speed, the electric motor can be very small, so that the thread cutting tool can be easily handled, and can have a low weight. Due to the low modulus, the high speed of the electric motor can be reduced to the operating speed of the holder ring without it being necessary that the worm gear have a large diameter.

Abstract: An apparatus for working of pipes or tubes, rod or bars, and the like, in the field of sanitary and heating installations, with electromotor drive. A drive machine is provided as the basic machine, and workpieces or working tools are selectively drivable or powered for carrying out a multiplicity of working procedures individually or in combination with each other, including, for instance, thread-cutting, tube-bending, cutting-off or separating, welding, and pipe cleaning.

Abstract: The invention relates to SO.sub.3 adducts with imides, which are sparingly soluble or insoluble in water, of the formula ##STR1## in which R.sub.1, R.sub.2 and R have the meaning indicated in the description, a process for the preparation of the adducts and their use as sulphonating agents.

Abstract: An apparatus is provided for machining tubular and/or rod-shaped workpieces. The apparatus has a rotational drive or motor for the workpieces to be machined. A switching device, which is accommodated in, and actuated by, a foot pedal, is connected to the rotational drive. The foot pedal is provided with a restart arrestor, and/or an emergency shutoff device to provide protection against unintended restarting of the apparatus after a power failure, or to instantaneously disconnect the apparatus from the electric circuit in case of danger.

Abstract: The production of 3-mercapto-propanediol-1,2 is attained with good yields and in an industrially simple manner by reacting liquid hydrogen sulfide with glycidol under pressure, namely either in the presence of aluminum oxide or a sodium aluminum silicate, i.e., in heterogeneous phase or in the presence of an alkali or alkaline earth hydroxide dissolving in reaction medium, i.e. in homogeneous phase.

Abstract: A thread-cutting head for pipes, tubes, and the like, with cutting jaws arranged in a cutting-jaw holder. The cutting jaws are radially adjustable by a control disc which is displaceably supported on the cutting-jaw holder and is adjustable by a clamping screw. The control disc for the cutting position of the cutting jaws relative to the cutting jaw holder is adapted to be tensioned and arrested against the force of a spring. The thead-cutting head also has a clamping lever as well as an unlatching abutment projecting into the thread-cutting range. The clamping lever is pivotally journaled on an arresting piece arranged on the control disc about a pivot pin directed transverse to the thread-cutting axis. A catch member is arranged between the cutting-jaw holder and the arresting piece. The clamping lever has a release pin directed against the catch member, and is embodied as an unlatching abutment at that end thereof directed toward the cutting jaw side.

Abstract: The production of 1-amino-propanediol-2,3 is attained with good yields and in an industrially simple manner by reacting liquid ammonia with glycidol under pressure in the presence of a small amount of an organic solvent.

Abstract: The yield of 1-amino-propanediol-2,3 is greatly increased and the process is carried out in an industrially simple manner by reacting liquid ammonia with glycidol under pressure and in the presence of a small amount of water.

Abstract: The production of 1-amino-propanediol-2,3 is attained with good yields and in an industrially simple manner by reacting liquid ammonia with glycidol under pressure.

Abstract: An apparatus for working of pipes or tubes, rod or bars, and the like, in the field of sanitary and heating installations, with electromotor drive. A drive machine is provided as the basic machine, and workpieces or working tools are selectively drivable or powered for carrying out a multiplicity of working procedures individually or in combination with each other, including, for instance, thread-cutting, tube-bending, cutting-off or separating, welding, and pipe cleaning.

Abstract: A ratchet lever with a ratchet head arranged on an actuating arm which has a head ring for receiving an interchangeable locking ring. The locking ring has an intermediate piece with at least one four-sided hole for plug or insert connection with a radiator nipple key.

Abstract: A die for cutting screw-threads, especially for cutting threads into steel for reinforcing concrete and the like with an external thread cutting machine to which the die is operatively connectible by means of a mounting portion having a support surface is disclosed. The die includes a cutting portion having a plurality of cutting teeth arranged in a cutting plane and a guide portion adjacent said cutting portion, which guide portion has a plurality of teeth arranged in a guide plane. The length of the guide portion corresponds to about 3 to 6 times the length of the cutting portion and is approximately 10 to 20 times the length of the cutting plane.

Abstract: A chuck, especially for a device for machining pipes and the like as for instance for threading, deburring, cutting and similar operations, with chucking jaws pivotable about an axis substantially parallel to the axis of the chuck for chucking the workpiece to be machined. The chuck is mounted on a rotatable support, and the chucking jaws are positively connected to the driving motor so that the chucking jaws automatically move into their chucking position in response to the start of the motor.

Abstract: A transportable external thread cutting machine having cutting blades which are mounted in a cutting head and can be brought into engagement with a workpiece which is to be machined by means of a control device which comprises an interacting slide and scanner. The slide and scanner form one single integral piece. When the cutting head is turned, the slide engages a control surface.

Abstract: A thread cutting die stock with a die stock head structure which has a first inner guiding surface for detachably receiving the shank of a first cutting head while radially inwardly of the aforementioned first guiding surface there is detachably arranged an adaptor having a second inner guiding surface for detachably receiving therein the shank of a second cutting head of smaller cutting size than that of the first cutting head, thereby making it possible by merely inserting or removing the adaptor to modify the die stock from receiving a larger sized thread cutting head to a smaller sized thread cutting head and vice versa.

Abstract: A separating device for bar and pipe-shaped workpieces, especially a cut-off machine, with a chucking device for chucking the cut-off workpieces and with a separating unit such as a cutting head for cutting off bar and pipe sections. The separating device includes at least one machining unit for machining the ends of the cut off workpieces and at least one feeding device for feeding a cut-off bar or pipe section cut off by the separating unit, to the end machining unit.