baber/WOPTO huggingface dataset:
Patent GB-1458009-A (GB)
Title: Rotary soil cultivating implements
IPC: A01B33/08
Filed: 1973-12-04
Abstract: 1458009 Rotary harrows C VAN DER LELY NV 4 Dec 1973 [4 Dec 1972] 56202/73 Heading A1B A rotary harrow 1 comprises a horizontal transverse row of coupled rotors 6, each carrying a U-shaped member having downwardly depending tines 51 of substantially circular cross-section at their upper parts, and which taper to soil-engaging parts 52. The tines 51 are formed so that the lower end of each tine trails the upper end during rotation. The lower part 52 of each tine 51 may be grooved to receive a hardened steel strip 53. Also, the part 52 may be formed with longitudinal grooves having a hardened layer or rib formed along the tine part which leads during rotation.
Patent GB-1286949-A (GB)
Title: Polymer-containing bile acid-fixing and triglyceride-fixing compositions for oral administration
IPC: A61K38/57
Filed: 1970-11-26
Abstract: 1286949 Polymer-containing compositions MERCK PATENT GmbH 26 Nov 1970 [27 Dec 1969 10 Oct 1970] 56340/70 Heading A5B A composition having bile-acid-fixing and triglyceride-fixing activity and suitable for oral administration comprises (a) a polymer of formula: wherein Y is H or CH 2 Z, Z is ionisable amino, a, b and c indicate the relative weight proportions of the structural units, a being 1-20%, b 60-90%, and c 5-20%, and n is the degree of polymerization, the polymer having a macroporous structure, a swelling volume of less than 5 ml/g. in water and a moisture content of less than 50% by weight after equilibration with air of 100% relative humidity at 25C and (b) a physiologically compatible carrier. The polymer may be an anion exchange resin in its chloride form.
Patent GB-1194746-A (GB)
Title: On-Board Loading and Unloading System
IPC: B63B27/24
Filed: 1967-12-12
Abstract: 1,194,746. Pneumatic conveyers loading and unloading ships. NIPPON KOKAN K.K. 12Dec., 1967 [17 Dec., 1966], No. 56424/67. Headings B8A and B8E. A ships hold is loaded or unloaded by a pneumatic conveyer system AC movable on a carriage on the deck and supplied by a main belt conveyer 2 in turn fed from a hopper 1 supplied by external conveyer means during loading while during unloading the main conveyer 2 conveys the material to a discharge conveyer 12. The pneumatic system AC comprises a suction nozzle, and an air distributer for discharging or charging a hold and a pressure vacuum pump together with a separating tank, rotary discharger and silencer.
Patent GB-1402035-A (GB)
Title: Cyclopentane derivatives
IPC: C07D311/00
Filed: 1972-12-07
Abstract: 1402035 Silylated prostadienoates IMPERIAL CHEMICAL INDUSTRIES Ltd 13 Nov 1973 [7 Dec 1972] 56501/72 Heading C3S [Also in Divisions C2 and A5] Trimethylsilyl 16 - (3 - chlorophenoxy)- 9,11α,15 - tri(trimethylsilyloxy) - 17,18,19,20- tetranor - 5 - cis,13 - trans - 12 - epi - prostadienoate, trimethylsilyl 16 - (3 - chlorophenoxy) - 9 - methoxyimino - 11α,15 - di(trimethylsilyloxy) - 17,18,19,20 - tetranor - 5 - cis,13- trans - 12 - epi - prostadienoate, trimethylsilyl 16 - (3 - chlorophenoxy) - 2 - methyl - 9 - methoxyimino - - 11α,15 - di(trimethylsilyloxy)- 17,18,19,20 - tetranot - 5 - cis,13 trans - 12- epi - prostadienoate, trimethylsilyl 9,11α,15- tri(trimethylsilyloxy) - 5 - cis,13 - trans - 12- epi - prostadienoate, 9 - methoxyimino - 11α, 15- di(trimethylsilyloxy) - 5 - cis,13 - trans - 12 - epiprostadienoate, trimethylsilyl 2 - methyl - 9α,- 11α,15 - tri(trimethylsilyloxy) - 5 - cis,13- trans - 12 - epi - prostadienoate, trimethylsilyl 9 - methoxyimino - 2 - methyl - 11α,15 - di- (trimethylsilyloxy) - 5 - cis,13 - trans - 12 - epiprostadienoate, trimethylsilyl 20 - ethyl- 9α,11α,15 - tri(trimethylsilyloxy) - 5 - cis,13- trans - 12 - epi - prostadienoate, trimethysilyl 9 - methoxyimino - 11α,15 - di(trimethylsilyloxy) - 13 - trans - 12 - epi - prostenoate, trimethylsilyl 9α,11α,15 - tri(trimethylsilyloxy)- 13 - trans - 12 - epi - prostenoate, trimethylsilyl 16 - phenyl - 9α,11α,15 - tri(trimethylsilyloxy)- 17,18,19,20 - tetranor - 5 - cis,13 - trans - 12- epi - prostadienoate, 9 - methoxyimino - 16- phenyl - 11α,15 - di(trimethylsilyloxy) - 17,18,- 19, 20 - tetranor - 5 - cis,13 - trans - 12 - epiprostadienoate, trimethylsilyl 16 - (2 - naphthyloxy) - 9α,11α,15 - tri(trimethylsilyloxy)- 17,18,19,20 - tetranor - 5 - cis,13 - trans - 12- epi - prostadienoate and trimethylsilyl 16- (2 - naphthyloxy) - 11α,15 - di(trimethylsilyloxy) - 17,18,19,20 - tetranor - 5 - cis,13 - trans- 12 - epi - prostadienoate are prepared by standard methods.
Patent GB-1418120-A (GB)
Title: 2,6-diaminoneburlarine derivatives
IPC: C07H19/16
Filed: 1973-12-07
Abstract: 1418120 2-Amino-adenosines TAKEDA YAKUHIN KOGYO KK 7 Dec 1973 [8 Dec 1972 11 Oct 1973] 568781/73 Heading C2C Novel compounds I and their salts in which R is phenyl or cyclohexyl both optionally substituted by C 1-4  alkyl, C 1-4  alkoxy or halogen are prepared by reacting (1) 2-halo-adenosine with an amine R-NH 2  or (2) reacting a compound III in which A is halogen or SO n R<SP>11</SP> (where R<SP>11</SP> is hydrogen, alkyl or aralkyl and n is 0, 1 or 2) and R<SP>1</SP> is hydrogen or acyl with ammonia. 6 - Chloro - 2 - phenylamino - 2<SP>1</SP>,3<SP>1</SP>,5<SP>1</SP>- tri - O- acetyl-nebularine is prepared by chlorination of 2 - phenylamino - 2<SP>1</SP>,3<SP>1</SP>,5<SP>1</SP> - tri - O - acetyl - inosine which is prepared by acetylation of 2-phenylamino-inosine or reaction of 2-bromo-2<SP>1</SP>,3<SP>1</SP>,5<SP>1</SP>-tri- O-acetyl inosine with aniline. 2-Phenylamino-6- methyl-thio-nebularine is prepared by methylation of the thiol which is prepared by the reaction of phosphorus pentasulphide with 2- phenylamino - 2<SP>1</SP>,3<SP>1</SP>,5<SP>1 </SP>- tri - O - acetylinosine. 6 - Chloro - 2 - cyclohezylamino - 2<SP>1</SP>,3<SP>1</SP>,5<SP>1</SP> - tri - O- acetyl-nebutarine is prepared by chlorination of 2 - cyclohexylamino - 2<SP>1</SP>,3<SP>1</SP>,5<SP>1 </SP>- tri - O - acetylinosine which is produced by acetylation of 2- cyclohexylamino-inosine. Compounds I have coronary-dilating and platelet-aggregation inhibiting actions and form with a carrier or diluent a pharmaceutical composition which may be administered orally or parenterally.
Patent GB-1247353-A (GB)
Title: Apparatus for joining together the edges of fabric sheets
Inventor: EVDOKIMOV VIKTOR VASILIEVICH
IPC: B29C65/78
Filed: 1968-11-29
Abstract: 1,247,353. Seaming and folding edges of non- metallic sheet material. VSESOJUZNY NAUCHNO - ISSLEDOVATELSKY INSTITUT NETKANYKH TEXTILNYKH MATERIALOV. 29 Nov., 1968 [29 Nov., 1967], No' 56825/68. Heading B5K. A machine for joining two edges 38, 39, Fig. 6, of the same or two different fabric sheets using a heat-sensitive adhesive 40 comprises a rotatable heating cylinder 7, Figs. 1 and 5, with devices for holding the sheet(s) on, and removing it or them from, the surface of the cylinder, and a mechanism, Fig. 3, for folding over the edge 38 and for conveying the sheet(s) directly on to the surface of the cylinder 7. The sheet(s) are placed with the edge 38 protruding beyond the edge 39 on a conveyer chain 2, Fig. 3, forming the edge folding mechanism and carrying swivelling plates 3, Figs. 3 and 6, which interact with a stationary shaped guide 4 to fold the edge 38 through 180 degrees to overlie a thermoplastictapeor film 40 which has been fed from a roll 23, Fig. 1, and applied by a roller 25, Figs. 1, 3 and 6. A flat guide 37, Fig. 3, ensures a uniform width of the folded edge 38 and a roller 26, Fig. 1, applies pressure thereto. A belt 28 running around the roller 26 and tensioning and depressor rollers 27, 9, respectively, prevents the edge 38 from unfolding whilst the sheet(s) pass from the chain 2 to the cylinder 7. The roller 9, Fig. 5, presses the edges 38, 39 against one or more rows of needles 8 extending radially from the cylinder 7 which heats the film 40 so that it becomes soft and adheres the edges 38, 39 together. The edges 38, 39 pass under a second depressor roller 10 and are removed from the cylinder 7 by elements 17 movably mounted on the cylinder and which interact with a stop 18 mounted on the end surface of the stationary part of the cylinder. The rollers 9, 10 are mounted on arms 11, 12 pressed against the cylinder 7 by springs 13, 14, respectively, and are each provided with at least one circumferential slot to receive the row(s) of needles 8. The tension of the spring 14 is adjustable by a screw 15. The cylinder 7 contains tubular heating elements 20 and an additional heater 21 with elements 22 is provided. The temperature in the heating zone is regulated and checked automatically in accordance with a preset programme by a device 29, Fig. 1.
Patent GB-1270600-A (GB)
Title: Improvements in and relating to portable fluid dispensing containers
Inventor: OANA KATSU
IPC: B65D83/16
Filed: 1969-11-20
Abstract: 1,270,600. Gas storage containers. K. OANA. 20 Nov., 1969, No. 56875/69. Heading F4P. [Also in Division F2] A container for discharging pressurized gas and liquid comprises a container 1 with an upper open end closed by a detachable head 25, and provided with a gas introduction means 6 which may include a piercing needle 9 and a non-return valve 19, into which a cartridge carrier 8 is screwed with a cartridge B inside it. The head 25 includes a manually operable discharge valve 29 and a detachable nozzle 39 which is freely rotatable through 360 degrees about the container vertical axis. For discharging liquid, the container is provided with a dip tube 35 having a weighted end 36.
Patent GB-1458021-A (GB)
Title: Security grille
IPC: E06B9/01
Filed: 1973-12-07
Abstract: 1458021 Protective windows BRISTOL ART METAL CO Ltd 6 Dec 1974 [7 Dec 1973] 56908/73 Heading E1J A security grille for an aperture in a structure, e.g. a door, comprises a first frame 3 with a portion 7 extending inwardly from one side of the structure and carrying a plurality of steel bars 8 and glass plates 9 with overlapping margins transversely spaced, a second frame 4 at the opposite side of the structure, and means fastening the frames together. The second frame has a flange rereceived between flanges 7 and 12 on the first frame, and the fastening means is adjustable so that the frames made be used with doors of different widths. The bars and plates pass through frame 3 and are supported at their lower ends by a U-shaped member (11) attached to frame 3. A flap 5 is hinged to inner frame 2.
Patent GB-1166679-A (GB)
Title: Magnetostatic Relay
IPC: H03K3/45
Filed: 1966-12-22
Abstract: 1,166,679. Magnetostatic relays. C.I.TCOMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS. 22 Dec., 1966 [24 Dec., 1965], No. 57575/66. Heading H3B. A magnetostatic relay can be controlled either by signals applied to the base of transistor TR 1  or by signals applied to windings 2, 3, 4. In the absence of a positive signal on line f c  the device operates as a conventional magnetostatic relay, the transistor providing an output only when the potential at point M is negative. If a positive signal is applied to point N by way of line f c  the transistor is blocked and no output is produced, whatever the potential at M. Pulse trains having different frequencies may be applied to lines f 1 C 1 , f 2 C 2 , f n C n , the output from the magnetic amplifier then being sampled only when the resultant potential at N becomes negative due to the absence of signals on line f c . The frequency of sampling is determined by the lowest of the frequencies on lines f 1 C 1 ,f 2 C 2  and f n C n  . If a large output current is required R 2  and R L  are made relatively small, but since a low value for R 2  results in the potential at M becoming negative shortly after removal of a positive signal on line f c , in spite of capacitor C which tends to maintain the potential at M, the sampling period must be short. If R 2  is made larger the output is smaller but no limitation is placed on the sampling period.
Patent GB-1450682-A (GB)
Title: Cycles
IPC: B62M23/00
Filed: 1972-12-14
Abstract: 1450682 Cycles with front wheel drive C E SHAW 13 Dec 1973 [14 Dec 1972] 57744/72 Heading B7E A motor or pedal cycle comprises a frame, a front wheel assembly steerably connected to the frame, drive means mounted on the frame, and means for transmitting drive from the drive means to the front wheel assembly to propel the cycle, the drive transmitting means including a member mounted to transmit driving torque by rotation about the pivot axis of the steering connection between the frame and front wheel assembly.  In the illustrated embodiment a double face bevel gearwheel 38, rotatably mounted on the steering head tube 18 of the frame of a bicycle, has one face engaging a pinion 36 mounted on the frame and fixed to a sprocket 32 connected by a chain 34 to a pedal-driven sprocket 16, and has its other face engaging a pinion 42 mounted on the front fork 24 and fixed to a sprocket 46 connected by a chain 48 to a free-wheel sprocket 50 on the front wheel. The pinions 36, 42 may each have a larger pitch diameter than the toothing of the gearwheel 38 with which they mesh. A further sprocket (10) [Fig. 2 not shown] is driven by the bicycle pedals 6, which sprocket is connected by a chain 14 to a free-wheel sprocket 12 on the rear wheel of the bicycle. The bicycle may be provided with a change-speed mechanism associated with the pedal crank to act on the drive to both the front and rear wheels, or with separate changespeed mechanisms for the front and rear wheel drives operable in synchronism, or with a change-speed mechanism for the front or rear wheel drive only arranged such that both wheels are driven at the same speed when one gear ratio, e.g. the lowest step-up ratio, is selected.
Patent GB-1458386-A (GB)
Title: Combustion
IPC: F23C99/00
Filed: 1973-12-13
Abstract: 1458386 Burners NIPPON FURNACE KOGYO CO Ltd 13 Dec 1973 [23 April 1973] 57874/73 Heading F4T In a high pressure burner, fuel, or a mixture of fuel and steam or air is injected into a chamber 4 wherein it is caused to flow along one side due to the Coanda effect whereby high temperature combustion gas is inducted along the opposite side of the chamber from the combustion space 9 to diffuse into the fuel stream to promote endothermic gasification of the fuel. The flow is stabilized by air from inlets 7 or 8.
Patent GB-1410929-A (GB)
Title: Tamper-proof closures
IPC: B65D51/24
Filed: 1972-12-15
Abstract: 1410929 Tamper-indicating closures ALCA SA 15 Dec 1972 [15 Dec 1971 15 Dec 1972] 57985/72 Heading B8T A thermoplastic tamper-indicating container stopper has a body 1 and a finger loop or ring 4 connected to the body 1 at two points 2, 3 with a frangible bar 5 joining the body and the loop, which bar 5 fractures on opening the container. Another embodiment Fig. 2 (not shown) shows the ring to be W-shaped with frangible bars (7) (a) joining the loops of the ring to each other and to the stopper body. The portion of the loop relative to the stopper may be varied. A further embodiment Fig. 7 (not shown) has the stopper skirt (21) integral with a pull-ring (22) and a joining member (23). Two frangible diaphragms (24) link ring (22) to the bottom edge of skirt (21), and both diaphragms have lines of weakness (26) to facilitate tearing on opening the container.
Patent GB-1137960-A (GB)
Title: Metal composite and electrolytic method of making same
Inventor: LUCE BETTY MAUD
IPC: H05K3/38
Filed: 1966-12-30
Abstract: 1,137,960. Printed circuits. CLEVITE CORP. 30 Dec., 1966 [6 June, 1966], No. 58370/66. Heading H1R. [Also in Division C7] Printed circuits may be produced from a composite material which comprises a foil of nickel, nickel alloy, copper or copper alloy having one surface adhered to a resinous substrate, e.g. a glass fibre reinforced epoxy resin, by means of an adhesive layer; said surface of the foil having, prior to formation of the composite material, been electrolytically coated with a nickel coating of suede-like appearance, i.e. a nickel coating which is not sound or smooth plate and which may contain nickel oxide or hydroxide. Prior to electrolytic coating the foil may be cleaned electrolytically or with finely divided magnesium oxide and may be etched, and after coating may receive a chromate dip. The foil may be produced by rolling or by electroforming. Details of the method of electrodeposition of the nickel coating appear in Divisions C6-C7.
Patent GB-1459427-A (GB)
Title: Process for the preparation of substantially pure dyestuffs
IPC: C09B67/20
Filed: 1973-12-21
Abstract: 1459427 Preparing substantially pure pigments HOECHST AG 21 Dec 1973 [22 Dec 1972] 59647/73 Heading C4P Substantially pure organic dyestuffs (i.e. pigments) are prepared by treating an impure organic dyestuff with an acid which dissolves the impurities contained in the starting material and converts the dyestuff into a salt thereof capable of being isolated, isolating the dyestuff salt from the acid, recovering the dyestuff in pure form by treatment with water and subjecting the dyestuff obtained to a mechanical fine division in an aqueous, organic or aqueousorganic medium. The acids used include sulphuric acid (70-100%) or oleum, and concentrated hydrohalic or halogenated acetic acids. The dyestuffs include quinacridones, perylene tetracarboxylic acid N,N<SP>1</SP>-diimides, polycyclic quinones, phthalocyanines (preferably halogenated), dioxazines, indigo and thioindigo compounds, their acid-stable derivatives and acid stable azo-dyestuffs. The mechanical fine division is carried out in a vibration, roller or bead mill using (a) water, (b) homogeneous mixtures of water and primary, secondary or teritary alcohols having 4 to 6 C atoms, (c) emulsions of water and alcohols, ketones, carboxylic acids and amides, esters, ethers, hydrocarbons, halohydrocarbons, and amines, or (d) organic liquids, e.g. anhydrous iso-propanol or xylene. Sulphuric acid may be recycled without regeneration.
Patent GB-1456989-A (GB)
Title: Process for the purification of copper phthalocyanine
IPC: C09B67/54
Filed: 1973-12-21
Abstract: 1456989 Purifying copper phthalocyanines HOECHST AG 21 Dec 1973 [22 Dec 1972] 59648/73 Heading C4P Copper phthalocyanines are purified by adding to 84 to 88% sulphuric acid, subjecting the copper sulphate suspension formed to crystal growth at 60-100 C., under an inert gas atmosphere, e.g. nitrogen or argon, isolating the copper phthalocyanine sulphate and recovering the copper phthalocyanine in the α- modification by addition of water. Crystal growth takes place for at least one hour. Small amounts of nickel, cobalt and iron phthalocyanines may be present and the copper phthalocyanines may be substituted, e.g. by halogen. Up to 10 times by weight of acid based on the weight of copper phthalocyanine may be used and the copper phthalocyanine sulphate may be isolated by optionally diluting with water to about 80% acid strength and then filtering. Acid of appropriate strength may be recycled and if contaminated, may be regenerated.
Patent GB-1442799-A (GB)
Title: Apparatus for trimming the head portion of rails to the correct profile by removing excess weld metal resulting from the welding together of rails
IPC: E01B31/15
Filed: 1973-12-28
Abstract: 1442799 Trimming welded rails ELEKTROTHERMIT GmbH 28 Dec 1973 [28 Dec 1972] 59964/73 Heading B3W Excess weld metal is removed from the head portion of welded rails by shearing cutters 8 and 9 shaped to the profile of the rail head and mounted on cross heads 7, 10 respectively rigid with parallel cylinders 3 and with the piston rods 12 of the cylinders. With the apparatus mounted on a rail, supplying fluid to the cylinders at 13 causes the cutters 8, 9, which have aligned cutting edges, to move towards each other. Stops 14 prevent the cutters from striking each other. To prevent the cutters lifting off the rail during the shearing plates 15 are slidable in guide slots in the cross heads 7, 10 for engagement under the rail head.
Patent GB-1388580-A (GB)
Title: Hydrogels
IPC: C08L3/00
Filed: 1972-12-29
Abstract: 1388580 Sustained release medicines TORAY INDUSTRIES INC 29 Dec 1972 [8 Jan 1972] 60094/72 Heading A5B [Also in Division C3] A sustained release medicament includes a hydrogel comprising a water soluble polypeptide or polysaccharide containing a chelating group bound to the polymer chain and a polyvalent metal ion, in which the polymers are cross-linked through chelation between the chelating groups of the polymer chains by the polyvalent metal ion (see Division C3). An insulin gel is obtained by adding a solution of insulin to carboxymethylamylasecystive (degree of carboxymethylation 0.2 mol per glucose residue, cystine 7.2 mol per 100 glucose residues, then adding zinc chloride solution and sodium hydroxide to bring the pH to 7.0, heating at 60‹C for 2 hours and then homogenising with physiological saline.
Patent GB-1360510-A (GB)
Title: Thermometers
IPC: G01K5/22
Filed: 1971-12-23
Abstract: 1360510 Thermometers THERMEX Inc 23 Dec 1971 60136/71 Heading G1D A clinical thermometer comprising a reservoir bulb 13 and a stem 12 which is of transparent plastics material and which has a capillary bore 15 communicating with the reservoir bulb 13 is characterized by two or more capillary bore portions 21a, 21b, 21c each of a cross section larger than a capillary bore portion more remote from the reservoir bulb 13. As shown, the reservoir bulb 13 and stem 12 which are made separately are telescoped and fused together so that the largest bore portion 21c in a tubular end 20 of the stem 12 is in communication with indicating liquid in the bulb 13, the bulb 13 being lined with a metal (e.g. steel), tubular shell 28. Temperatures sensed by the bulb 13 are indicated by use of a scale on a flat portion of the stem. The plastics material may be polystyrene.
Patent GB-1369443-A (GB)
Title: Control systems
IPC: H04B5/00
Filed: 1970-12-22
Abstract: 1369443 Inductive signalling JM BENTLEYBEARD 21 March 1972 [22 Dec 1970] 60753/70 Heading H4U An inductive signalling system comprises a receiving aerial in the form of a loop, a control receiver connected to the loop and a transmitter operable in or adjacent the loop to radiate lowfrequency electro-magnetic waves via a ferrite cored coil. As described, the loop surrounds a house occupied by elderly people, each being provided with a pocket transmitter which on operation causes a remote alarm to be actuated. Another application suggested is for a night watchman in a factory or office block. The receiver controls the alarm to give an intermittent indication and if a transmitter is operated continuously for a predetermined period the alarm is maintained in operation after the transmission ceases, means being provided at the receiver to stop the alarm. Means are provided at the receiver and the remote alarm to operate the alarm independently of a transmitter.
Patent GB-1326644-A (GB)
Title: Printing hammer mechanism for a high speed printer
IPC: B41J9/36
Filed: 1970-12-30
Abstract: 1326644 Selective printing CIBA-GEIGY AG 30 Dec 1970 [30 Dec 1969] 61886/70 Heading B6F A selective printer comprises type members 27 urged against a platen 20 by sliding hammers ], the hammers being propelled towards the type member 27 by coil springs 7 when latches 14 are released thereform by electromagnets 15, the hammers being collectively returned to cocked position by a common reset device 13, 13a. Hammer rebound is prevented by the latch 14 engaging a shoulder (30, Figs. 5-7) when the hammer bounces off the type member 27 and platen 20 after impression. The type members 27 are mounted on leaf springs 28 on a reciprocating carriage 23.
Patent GB-663211-A (GB)
IPC: A47L9/02
Abstract: 663,211. Suction cleaner nozzles. ELECTROLUX, Ltd. (Aktibolaget Elektrolux). Jan. 7, 1949, No. 512/49. Addition to 653,856. Class 8 (i) A suction cleaner nozzle is formed with a riblike partition or partitions 15, Fig. 1, which extend continuously from one end of the nozzle mouth 11 to the other and are each recessed at its upper edge 20a, 26a, Fig. 3, adjacent the outlet socket to provide intercommunication of the channels 27 on each side of the partition or partitions prior to entry of the air streams flowing through said channels 27 into the outlet socket 13.