The invention includes a photometer (10) and a photometric test strip (31) for use with the photometer for monitoring the presence and amount of an analyte in a liquid sample. The photometer (10) includes a light source (25) and a photodetector (26) which form an optical path for detecting light transmitted through a test strip (31). The latter has a dry support and an indicator portion, both of w...

A disposable pallet comprises a base plate (1) of corrugated cardboard and a plurality of block-shaped feet (2) situated on the bottom side of the base plate (1). Each block-shaped foot (2) is made of a strong corrugated cardboard and is substantially solid, said foot comprising a substantially planar laminate including at least ten layers (3a, 3b, 3c, ..) of corrugated cardboard situated substant...

PCT No. PCT/SE88/00133 Sec. 371 Date Sep. 6, 1989 Sec. 102(e) Date Sep. 6, 1989 PCT Filed Mar. 16, 1988 PCT Pub. No. WO88/07109 PCT Pub. Date Sep. 22, 1988.According to a method of preventing freezing in water piping there is arranged a non-return valve (3) upstream of the portion (1A) of the piping (1) which is to be protected, and a safety valve (4) downstream of this portion. The safety valve o...

PCT No. PCT/SE88/00133 Sec. 371 Date Sep. 6, 1989 Sec. 102(e) Date Sep. 6, 1989 PCT Filed Mar. 16, 1988 PCT Pub. No. WO88/07109 PCT Pub. Date Sep. 22, 1988.According to a method of preventing freezing in water piping there is arranged a non-return valve (3) upstream of the portion (1A) of the piping (1) which is to be protected, and a safety valve (4) downstream of this portion. The safety valve o...

A graphite electrode is connected to each of the graphite electrodes (10) via a nipple. An electric current is supplied to these electrodes in an arc furnace of melt and refine metals. A method f-of refining and melting metals and a cooling appts. used for it, wherein, during he refining, a cooling liq. (11) consisting of water is continuously sprayed onto the outer periphery (10a) of at least one...

Anchoring bar (1), provided with a shaft (2) with several conical sections (7), cemented by means of a hydraulic mortar (12) in a borehole (11) made in a fixing foundation (10). When a crack appears, causing an increase in the diameter of the borehole (11), the mortar case expands, under the tractive force applied to the anchoring bar (1), as a result of a slippage of the anchoring bar (1) in rela...

A liquid evaporating apparatus includes a liquid inlet (1) to which there is connected an evaporator (2) which incorporates a gas inlet (28) and gas flow channels which are defined by vapour-permeable hydrophobic walls (23, 24, 25, 26). The apparatus may be used to moisturize air in a room, in which case the apparatus is configured to circulate air, e.g. room air, through the evaporator and to dis...

A liquid evaporating apparatus includes a liquid inlet (1) to which there is connected an evaporator (2) which incorporates a gas inlet (28) and gas flow channels which are defined by vapour-permeable hydrophobic walls (23, 24, 25, 26). The apparatus may be used to moisturize air in a room, in which case the apparatus is configured to circulate air, e.g. room air, through the evaporator and to dis...

For use with swimming pools a part of water is removed from the pool through known methods via a tube and filtered, treated with a disinfectant containing halogens, put through any pH adjustment and warming, and returned to the pool. Trihalomethanes and other volatile compounds are removed through stripping of the water taken from the pool with air in counter-flow.

The console (1) has two book cover supports which are adjustable to accommodate books of varying thickness, and automatically compensate the increase and redn. of the book sides as reading progresses. The book rests against the glass plate (5) at all times so that there is no gap. When the console is tilted backwards for page turning, the book sides are pressed against the front plate. Springs are...

In a first stage CaCO3 is added to the water in equimolar quantities to the Fe2+ content. In a second stage CaCO3 is added in equimolecular quantities to the H2CO3 content. The plant can comprise three parts: The first vessel contains the incoming iron-containing water where CaCO3 is added. CO2 is given off. The water is transferred to second vessel when more CaCO3 is added. In the third stage Fe(...

The plant used has at least one crushing station (5,14), and at least one sieving station (5,9). Between the stations are conveyors (6,7,7',15,16). Crushed stone is taken fro the sieving stations to separate locations (1-4) according to size. When required, it is fed back to the crusher stations for re-crushing and further conveyance to the sieving stations. Because both long and short sieving ope...

Appts includes a polyvinyl fluoride film adhered to the glass of a diving mask, and enables the glass to function as a loudspeaker. To the film is connected a sound amplifier which is battery-operated. The amplifier receives its input signal from a sound microphone fixed to the interior of the diving mask. The microphone signal can, if required, be transmitted through a phase-shifter prior to entr...

The double beams of the rear part each comprise round steel bores with end parts (26) bent at right-angles outside the hinges and forming stops when the side parts (12) are lowered. The side parts consist of U-shaped bent round bars forming vertical beams (14) from which project console beams (16) for baking plates (42). - Above each console on the side parts are manually displaceable arrestors (3...

The invention concerns a further development of a method of transmitting information via tone signalling via a connected telephone line B, where an information transmitter A makes a call to an information receiver C and where after the telephone connection is established a speech machine 19 linked to the information transmitter sends a first audio message such as "Who are you? What do you want?" t...