A novel, optically transparent, isotropic molding for optical purposes which is free of orientation birefringence consists of a mixture of polyphenylene ethers, vinylaromatic polymers and additives. The novel molding contains traces of novel diphenoquinone and/or diphenohydroquinone derivatives as additives and may also contain novel ammonium salts of sulfuric acid half esters of diphenohydroquinones as further additives. The novel molding has a yellowness index (YI) of from 40 to 90. It can be ...

The subject apparatus is a ball holder adapted and constructed for display purposes, as used to hold within the confines of the holder a baseball, or other type of ball, to be displayed inside a transparent cover, so as to be viewable from the outside, with the device comprising a base member adapted to rest on a horizontal surface with the upper part of the base member having integrally affixed thereto a transparent globular hollow member in which a ball is inserted for storage and viewing purp...

The invention is directed to an angle piece for dental purposes comprising a tool with cylindrical tool shaft (50), which tool is supported in the head part (1) transversely relative to the drive axis or axle and is securely connected with its drive gear wheel (5) and is interchangeable together with the latter and is characterized in that a head bearing (42) on the tool side, which head bearing (42) is insertable in the head part (1) in a form-locking manner, is rotatably and undetachably conne...

Pump arrangement (10) for medical purposes, in particular blood or infusion pump, comprising a pump housing (12) having two pump chambers (16, 18), of which the work chamber (16) is subjected to the liquid to be pumped while the drive chamber (18) is connected via a connecting conduit to a pneumatic pump (14) of restricted pumping volume. This connecting conduit (50) comprises a valve (56) which is opened at the respective changeover point (top and bottom dead-center) of the pump (14) to set the...

An electrical cable, for communication purposes, having spaced-apart, insulated electrical conductors, between each two of which is disposed a portion having a block-shaped cross section, with a plurality of tension-absorbing elements of high-strength fibers being disposed in this portion. The problem in the past has been that the flexibility of the cable is limited by the specific breaking elongation of the fibers. To resolve this problem, and to improve the flexibility primarily for terminatio...

An electrically energized heater is provided which has particular application as a dry disinfecting and sterilizing device for items such as soft lenses, dental handpieces, baby bottles, or the like, which cannot be placed in sterilizing solutions, and which cannot be subjected to excessive temperatures. The unit includes a housing, and a heat conductive substance such as wax, oil, or both, contained in the housing and used as a uniform heat transfer medium between electrical heating elements in...

A novel setting composition for dental purposes comprises a dental silver amalgam alloy composed mainly of silver and tin, and including one or more of copper, zinc, indium, palladium and gold; mercury in an amount sufficient to amalgamate said alloy: and selenium. The selenium may or may not be coated with a metal showing an affinity for mercury, such as silver. The amount of selenium contained is in a range of 0.005 to 5% by weight.

The invention relates to a pinching device for surgical purposes comprising two parallel jaw elements having each a supporting part, one of which is provided with a pin at right angles thereto and the other having a sleeve mounted at right angles thereto and fitting around said pin. The pinching device according to the invention is characterized in that one supporting part is provided with a guide pin and the other has a bore receiving said pin located in the same plane as the first-mentioned pi...

A solar collector transfers the thermal energy of solar radiation to a liquid which acts as thermal vehicle, said liquid being moved by a thermo-convective action in a closed circuit so transferring through heat exchange the absorbed heat to a fluid contained in a vessel. This solar collector, compact in structure and low in cost, is provided with a valve which is apt to allow said thermo-convective action of the liquid in one sense, while blocking it in the opposite sense.

An articulated splint especially a so-called post-operative knee splint including splint anchor bars enclosed in two plaster casts with a reusable joint member detachably connected to the anchor bars. The two anchor bars are connected to a lock plate of the joint by stubs. A screw extending through apertures in the lock plate adjusts the relative angular position of the stubs and thus of the anchor bars.