Abstract: An improved respirator system which protects the head of the operator while allowing excellent visibility and improved breathing conditions in a contaminated environment is disclosed. The system includes a hose mask with facepiece having a lens which provides improved visibility to both sides, as well as above and below the operator. The facepiece is provided with a seal around the head portion of the wearer with connection through a suitable hose ventilating system to a source of uncontaminated air at atmospheric pressure. The respirator is of the class B type, in which air is brought into the lungs from a source of uncontaminated air at ambient conditions through the bodily breathing function of the operator alone, without the use of an air compressor or a supply of compressed air.

Abstract: A packingless gate valve is disclosed which includes a housing having opposed similar housing halves with pipe nipples extending therefrom and with resilient sleeve units installed on respective lock rings mounted in recessed portions of the housing halves. The sleeves act to compressibly engage each other in the valve open condition and engage opposite sides of the gate in the valve closed condition. Each sleeve unit has a radially outwardly extending flange on the inner and outer axial ends with these flanges being located in indented regions between each lock ring and the respective housing half. An encircling thin stiffening ring of harder material is bonded to the axially outer surface of the flange on the inner end of each sleeve, each stiffening ring being shaped with a right angle bend so as to provide both axially and radially facing surfaces for each sleeve body. Each stiffening ring is engaged with the respective lock ring along the entire length of the stiffening ring.

Abstract: A locking device or button for hollow stem auger couplings including an outer body section having an internal bore, a locking pin assembly mounted within the bore, and cooperating cam structure for moving the pin assembly a predetermined distance between locked and unlocked positions. Seal means at opposite ends of the bore keeps water and dirt out of the bore and protects the cam structure.

Abstract: A method for heating thick-walled glass tubes, particularly quartz tubes, in the manufacture of optical fibres while using microwave energy. According to the invention, the tube (5) is pre-heated to a temperature of about 1000.degree. C.-1500.degree. C., preferably in a known manner with the aid of a gas flame, whereafter the tube is further heated by means of microwave energy, generated by a microwave generator, by inserting the tube (5) axially into a microwave cavity (2) incorporating in both end walls (6,7) or end surfaces openings (3,4) for the tube (5), the electrical field strength being given a field image which includes only one tangential component, according to TE-01n-mode, preferably according to the mode TE-011, whereby the electrical field is so formed as to be tangential to the surfaces of the tube (5), and so formed that the electrical field strength is zero adjacent the surfaces of the cavity (2). The invention also relates to apparatus for carrying out the method.

Abstract: A storage bunker for substantially dry and loose material such as shredded paper waste has a receptacle (10) and a conveyor (16,18) feeding material over a fixed plate (14) broken at (21) to permit the material to fall into the receptacle. The return run of conveyor (16) compacts material towards the other end of the receptacle, and the whole mass of material once the receptacle is filled is driven by conveyor (25) towards an outlet, with material being stripped from the mass by an inclined toothed conveyor (26) for collection by a troughed conveyor (28).

Abstract: Pallet comprising base members (1-3) and crosswise members or tubes (4) perpendicularly thereto, especially a disposable pallet. According to the invention the pallet comprises base members (1-3) made by winding a web material coated with glue, the width of which suitably is equal to the length of the base member, around the first spindle, which preferably has a rectangular cross section, to the formation of an inner first bobbin (9). Subsequently a second spindle has been placed below the said first completed bobbin (9) and in contact with the lower surface thereof, the dimensions of the said second spindle being such that the same combined with the said first bobbin essentially completes the intended inner dimensions of the base member. The web material coated with glue on the surface has thereafter been wound around the structure formed by the said first bobbin (9) and the said second spindle to the formation of an outer second bobbin (10) whereupon the web has been cut and the spindles removed.

Abstract: A ready-to-assemble cabinet requiring no fasteners for assembly. Side panels interlock with a back panel, front rail, and shelves to form a free-standing, self-supporting unit.

Abstract: A magnetron sputtering cathode with a target plate of the material to be sputtered connected to a support body of non-magnetic material, having a chamber disposed between the support body and the target plate, with a coolant flowing through said chamber, said chamber being formed by a recess in said support body, with said recess being tightly covered by said target plate; and having a permanent magnet system disposed beneath the target plate, wherein the target plate (10) abuts the front side of a plate-shaped support body (13) and the likewise plate-shaped permanent magnet system (12) abuts the back side thereof, and the permanent magnet system (12) has a plurality of continuous, meshing magnetic pole tongues (17, 19) of opposing polarity and arranged in spaced relationship to each other, with said tongues being coupled together via a magnet bridge (20) and producing a magnetic field of meandering shape extending substantially solidly over the entire surface of the target plate.

Abstract: A projection objective with variable focal length is provided, consisting of a front member (F) with negative refractive power and a multiple-lens basic objective (G) with positive refractive power, between which a multiple-lens variator (V) displaceable in the direction of the optical axis and with positive refractive power is disposed, with said objective having seven self-contained lenses (L1-L7) separated from each other by air spaces and free of cemented surfaces, whereof the front member (F) consists of one single lens (1) with negative refractive power, the basic objective consists of a Cookes or Taylor lens (L5, L6, L7) and the variator (V) likewise consists of a Cookes or Taylor lens (L2, L3, L4).

Abstract: At the jointing of pipelines (3), especially underwater, as well as at the repair of damaged portions, a jointing piece (1) must be inserted because the two pipe ends (5) cannot entirely be jointed with precision. The invention proposes an explosive welding method with two explosive charges (2), by which method such a jointing piece (1) can be welded-in rapidly and simply and the joint can be checked from the outside of the pipe.

Abstract: A sanitary hanger bearing assembly for use in food handling screw conveyors is disclosed. The hanger bearing assembly employs a cam construction and stepped lug arrangement which are of substantial benefit in allowing the unit to be easily disassembled for washdown or maintenance, while holding the parts firmly together when the assembly is in the operating position.

Abstract: A fire resistant wall element comprises a phase conversion material, preferably glauber salt, the phase conversion of which takes place at a temperature below about 50.degree. C. and is endothermic. According to the invention, the wall element (1) includes a further, a second, phase conversion material (6) placed adjacent the firstmentioned phase conversion material (3), the phase conversion of the further phase conversion material (6) taking place at a higher temperature than the aforementioned temperature, the further phase conversion material (6) being intended to be placed nearer the outer surface (5) of the wall element (1) than the firstmentioned phase conversion material (3), this outer surface being the surface which is heated in the event of fire.According to one preferred embodiment, the further phase conversion material (6) contains bound water in such large quantities that the endothermic reaction taking place during the phase conversion process essentially constitutes the vaporization of water.

Abstract: The invention relates to a method for welding different materials. An adapted quantity of additive material in the form of particles (3) is accelerated with the aid of an explosive charge (1) and a propulsion element (2) to a high velocity down into a joint space (8), where the particles collide with the workpieces (4, 5) and bond thereto and to themselves.

Abstract: Process and device for filling packaging containers, in particular tubular bags or similar packages, with doses having a predetermined weight of a fluid, powdery or finely granulated filling material, with the filling material being gravimetrically introduced into the packaging containers such that the predetermined amount of filling material to be introduced into the packaging container is fed by means of a speed-controlled metering screw at intervals, gravimetrically regulated, from a first filling material supply, and a measured amount of the filling material more or less equivalent to the amount dispensed is subsequently fed from a second filling material supply to the first filling material supply within a time corresponding to the stop period of the packing machine.

Abstract: A method for measuring the distance between a first object, which incorporates a transmitter-receiver unit, and a second object, which incorporates a transponder. In accordance with the invention there is transmitted from the transmitter-receiver unit (19) a first microwave signal (S1), which is received in the transponder (18). A second signal (S3) of much lower frequency F.sub.m is generated in the transponder and is modulated on a signal (S6) of microwave frequency in the transponder to form a modulated signal (S7). The modulated signal (S7) is transmitted from the transponder to the transmitter-receiver unit (19), where it is received and mixed down with the first signal (S1) and thereafter is (a) low-pass filtered to form a first measuring signal (S10) having the frequency F.sub.

Abstract: A data handling terminal includes a microcomputer and a memory, the microcomputer preferably being intended for connection to a central computer. The data handling terminal (1) is characterized in that it includes a feed path (5) arranged to advance a so-called time card (29), in that arranged along the path (5) is a reader (18), which is arranged to read a bar code (30), a printer (19) and a sensor (21), which is arranged to transmit a signal to the microcomputer (2) when the time card (29) occupies a pre-determined position in relation to the printer (19).

Abstract: An electric motor-driven drill has an irrigating tube for squirting water onto a drill bur. The tube has convolutions surrounding the motor for cooling the motor and warming the irrigating water. A quick-release chuck holds the bur shank coupled to the motor shaft.

Abstract: Pallet consisting of several base members, which can have recesses for forks of a fork lift. The base members have holes perpendicular to the length of the members distributed along and closely adjacent the upper surfaces of the base members. Tubes inserted through the holes unite the base members to form the pallet. The base members consisting of three pressed carton pieces folded to a rectangular U-section, the length of each piece corresponding to the length of the base member. The first and the second pieces have a height substantially the height of the pallet. The third piece has an inner height dimension which is approximately the diameter of the tubes. The first carton piece in a base member has the U-section upright with the back of the U downwards, the second carton piece has the U-section as an inverted U-form disposed in the first carton piece. The third carton piece is located with its U-section upright and within and uppermost in the second carton piece.