The invention is related to a soft-tissue filter apparatus for a cephalostat, said apparatus being capable of positioning the patent (P) stationary for exposing radiographic images of the skull. The apparatus comprises an x-ray source (13) whose collimated (14) x-ray beam (XR) can be directed through the skull of the patient (P) onto an x-ray film (RF) contained in a cassette (23). The apparatus f...

The electromagnetic drive has two electromagnets (3,4) whose pole surfaces at least partly face each other. A spring biased armature (2) is provided to move to and fro between the pole surfaces.When the magnets (3,4) are switched off, the armature (2) is brought by spring force into an intermediate position and is held there. When one of the magnets (3,4) is switched on, the armature (2) is brough...

The apparatus is used to determine the colour of a tooth (12) in the mouth of a patient. The apparatus has a light source (10) with a visible light spectrum. A first light conductor (20) conveys the light from the light source (10) to the tooth to be examined. A second optical conductor (24) has an end joined to the end of the first conductor (20) to receive light reflected from the surface of the...

A sanitary napkin having an absorbent core with three longitudinally oriented trisections, a central trisection flanked by two outboard trisections. The absorbent core is formed of a single layer of tissue. The single layer of tissue is folded on itself to provide a two-ply thickness at each of the outboard trisections and a single thickness at the central trisection. The two plies of the outboard...

A rotor for shredders and hammermills includes a rotor body having an outer cylindrical surface extending along an axis, a plurality of axially spaced concavities (64) defined on the outer cylindrical surface and a hammer (13) supported within each concavity. The outer cylindrical surface has a convex surface (72) radially extending at least ninety degrees about the axis. Each concavity (64) is ra...

A method of embedding auxiliary information into the digital representation of host data containing noise in the low-order bits. The method applies to digital data representing analog signals, for example digital images. The method reduces the error introduced by other methods that replace the low-order bits with auxiliary information. By a substantially reverse process, the embedded auxiliary dat...

A process and a low-output plant (10, 12, 13) for the continuous slab-stock foam. An MDI-based chemical component is mixed with a polyole and carbon dioxide (CO2) and the frothed mixture is delivered on a substrate (11) moving toward a slab-stock cutting zone (16). The quantity of carbon dioxide (CO2) is kept at a value greater than 1 %, preferably within 1.5 and 5 % in respect to the polyole comp...

In an electrosurgical instrument susceptible to varying load impedance, particularly varying load reactance, a fixed frequency radio frequency generator has an output stage (Q1, Q2, TR2-TR4, C1, VC2, 42) consisting of at least one output power device and, coupled to the power device, an output network with a load-dependent resonant condition. To compensate for variations in the load reactance, the...

A process for recovering a polyester, preferably polyethylene terephthalate, from contaminated polyester waste containing non-polyester components, such as polyester blended with cotton or other fibers in fabric or fiber forms, polyester magnetic tapes, coated polyester films and engineering resins, by dissolving the polyester in molten dimethylterephthalate, methyl-p-toluate or dimethylisophthala...

The present invention concerns a process for forming titanium metal alloys directly from crushed titanium sponges or from powders. The process uses a low melting point bath containing bismuth, which allows the introduction under vacuum of titanium, as well as the addition of other elements and facilitates low temperature extrusion. The extruded semi-finish products then undergo degassing, grouping...

A process for producing an aromatic polyester by esterifying a dicarboxylic acid mainly composed of an aromatic dicarboxylic acid and a glycol mainly composed of ethylene glycol in the presence of 1 to 30 mmol%, based on the dicarboxylic acid, of a quaternary phosphonium sulfonate having ester-forming functional group(s), and then polycondensing the resulting product.

Mfg. minute metallic balls (20) uniform in size comprises making short pieces (16; 10) of metallic wire by cutting a fine metallic wire (1) to a given length and shaping the pieces into balls by heating and melting them at a temp. higher than the m.pt. of the metal. @(94pp Dwg.No.20/30)@

A silicon wafer measuring method includes: (a) a first step of measuring a light transmission characteristic (IOBS) of the pulled silicon wafer by incidence of parallel polarized light at Brewster angle into the pulled silicon wafer, (b) a second step of measuring a light transmission characteristic (IO) of a floating zone silicon wafer functioning as a reference silicon wafer both front and rear ...

An electrical circuit system which provides electrical energy to a surgical apparatus having ultrasonic fragmentation, aspiration and electrosurgical coagulation capabilities, which system also includes an impedance sensing network and automatic feedback power output control to reduce RF power output as load impedance increases, thereby reducing RF leakage current.

The tank outlet pipe comprises a cylindrical pipe (1), the outer diameter of which corresponds to the inner diameter of the base outlet of the storage tank. The outer end of the cylindrical pipe is formed as a threaded extension (2) for the hose connection. On the cylindrical pipe a bearing bush (4) with union is located in a fluid tight manner and displaceably. On the outer diameter of the bearin...

In a process for producing rigid polyurethane foams by reacting a) polyisocyanates b) compounds containing at least two hydrogen atoms capable of reacting with isocyanate groups, in the presence of c) catalysts, d) blowing agents and, if desired, e) further auxiliaries and/or additives, the component b) comprises at least one recycled polyol which is formed by glycolysis of polyurethanes.

A process for recovering a polyester, preferably polyethylene terephthalate, from contaminated polyester waste containing non-polyester components, such as polyester blended with cotton or other fibers in fabric or fiber forms, polyester magnetic tapes, coated polyester films and engineering resins, by dissolving the polyester in molten dimethylterephthalate, methyl-p-toluate or dimethylisophthala...

In an electrosurgical instrument susceptible to varying load impedance, particularly varying load reactance, a fixed frequency radio frequency generator has an output stage (Q1, Q2, TR2-TR4, C1, VC2, 42) consisting of at least one output power device and, coupled to the power device, an output network with a load-dependent resonant condition. To compensate for variations in the load reactance, the...

There is disclosed an allergen particle exclusion covering comprising a permeable composite fabric of which one component is a porous fabric having electrostatic charge which traps particles in the pores.