A method for stabilizing silica gel wherein after the gel is precipitated it is treated in a solution consisting of a liquid which is preferably water, aluminium sulphate and a compound such as a carbonate, hydroxide or oxide of a divalent metal.

A method for stabilizing silica gel wherein after the gel is precipitated it is treated in a solution consisting of a liquid which is preferably water, aluminium sulphate and a compound such as a carbonate, hydroxide or oxide of a divalent metal.

A harmonic current attenuating apparatus of a motor 30 which controls a rotation speed of the motor 30 by phase-controlling a sine wave AC power supplied from a power supply unit 10 and attenuates the harmonic current generated at a phase-controlling mode of the AC power by way of an harmonic current attenuating unit wherein the apparatus comprises: a manipulating unit 34 for selecting a phase-con...

A zero-gap type electrolytic cell 11 characterized as having a hydrophilic liquid-permeable material 16 interposed between an ion-exchange membrane 12 and a gas diffusion cathode 17. The reaction product passes through the liquid-permeable material and disperses toward edges of the liquid-permeable material before being withdrawn. Hence, the withdrawal direction for the target reaction product is ...

The feeding method concerns the transfer of panels (2) from the top of a vertical stack (17) to a loading table (4) on a panel saw machine. The panels (2) are pushed by mobile horizontal pushers (7) from the stack (17) until they arrive at an infeed device (8) which conveys the panels (2) to the loading table (4). The pushers (7) and the vertical stack (17) perform relative movements controlled by...

A flat-head carder, equipped in the tangential area between the main drum (20) and briseur (15) with a fiber-guiding wedge (22,30) fitted with a discharge opening (28,31) provided at a tangential direction to the surface of the drum and prior to their tangency, connected to an aspirating nozzle (29).

Purification of gases and gas-particle mixtures emitted by a coffin by passing them through a pot containing a number of annular concentric chambers, each filled with an impregnated active carbon adsorbant,different in each chamber. The gas only passes through the pot when the pressure in the coffin exceeds a threshold, and flow stops when the pressure drops to just above atmospheric. Purificatio...

The invention relates to a valve arrangement with a pressure limiting valve and a flow regulator valve, which comprises a flow regulator piston, having at least one first hydraulic resistor, distinguished in that the flow regulator valve's (5) flow regulator piston (15) has a split pressure return surface and in that the first part (ring surface (45)) of the pressure return surface is capable of w...

A perforated extensible palletizing film (10) comprising a longitudinally elongated thin sheet (13) of extensible plastics provided with ventilation holes (15) and longitudinal reinforcement elements (16) which are made of extensible plastics and are adapted to increase the strength of the film in the pulling direction.

The invention is a new system for the fastening of the translucent parts (1) of ceiling lamps to the relevant plates (2), characterized in that the fastening elements cannot be seen, the fastening operations are quite easy, the translucent part (1) can be fixed to the plate (2) with no need to use common or specific tools. The edges of said plate (2) are provided with pins (2.1), while the translu...

PCT No. PCT/GB96/00117 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Jan. 19, 1996 PCT Pub. No. WO96/22291 PCT Pub. Date Jul. 25, 1996The invention relates to an anhydrous crystalline form of (2-[2-amino-1,6-dihydro-6-oxo-purin-9-yl)methoxy]ethyl L-valinate hydrochloride (otherwise known as valaciclovir hydrochloride) and a process for preparing it.

A heart rate value determined from a first physiological signal that is acquired independently from a second physiological signal, is used to control a band pass filter for controllably bandpass filtering the second physiological signal. In a system having sensors for independently acquiring both electrocardiogram (ECG) and pulse oxime try (SpO2) signals, a heart rate value determined from the ECG...

A method of providing prepaid time-related access from a remote computer terminal, which is linked through a central server of an Internet Service Provid er, to the Internet, provides such access only when an outstanding balance of time remains in the prepaid account of an authorized customer. The method may further provide for on -line replenishing of the prepaid account, using a transaction form...

12 A method of providing prepaid time-related access from a remote computer terminal, which is linked to the Internet through an access server of an Interne t Service Provider, provides such access only when an outstanding balance of time remains in the prepaid account of an authorized customer. The method may further provide for on -line replenishing of the prepaid account, using a transaction fo...