baber/WOPTO huggingface dataset:
Patent GB-417093-A (GB)
Title: Improvements in aircraft
IPC: B64C23/00
Filed: 1934-01-11
Abstract: 417,093. Aircraft propellers. RIGBY, F. G., and RIGBY, P. N. R., 25, Stubb's Gate, Newcastle, Staffordshire. Jan. 11, 1934, No. 1045. [Classes 4 and 114.] An aircraft adapted for forward motion, direct lift and hovering has two tractor screws a mounted on two longitudinal shafts on each side of the fuselage, two fans b adapted to be moved into engagement with the screws a when it is desired to obtain vertical lift, and a third fan c at the front of the machine to check forward motion. Each propeller a is shaped as shown in Fig. 2 and comprises two scoops m converging to a single ridge line n. Each fan b comprises a blank bent to a sinuous curve corresponding to the rear edges of the scoops m and in addition having its rear ends bent oppositely with respect to the axis of a sleeve capable of sliding on the propeller shaft. The fan c comprises two oppositely directed scoops and is adapted to be driven at twice the speed of a main transverse driving shaft l.
Patent GB-1111951-A (GB)
Title: Mine gas determination apparatus including radio transmitting and receiving equipment for sending monitoring signals
IPC: E21F17/18
Filed: 1966-01-10
Abstract: 1,111,951. Radio and inductive signalling. R. HœBNER. 10 Jan., 1966 [21 Jan., 1965], No. 1052/66. Headings H4L and H4U. [Also in Division G1] Mine gas determination apparatus comprising a mobile instrument with a coupled radio transmitter and in which reception of a signal by a receiving unit causes an associated transmitter to send a " message received" signal on another frequency to the transmitting unit concerned, where it operates an indicator, is described with reference to the forwarding to a control centre of the readings taken along mine workings by the instrument. A deputy carries an instrument 2, Fig. 1, a transmitting unit 1, and a receiver 3. The operation of a key starts the determination of gas content and switches on the radio equipment. The results may be transmitted as frequency variations of the unit 1. A visual or audible indicator is operable by the receiver 3. Reception of signals from the deputy's portable unit is effected by stationary receiving units 5 which are spaced along the mine workings so as to give continuous coverage, and which are linked together and to the control centre by leads 8, which may also serve as aerials. Each receiving unit 5 has a confirmation transmitter 6 adapted to send a " message received " signal to the deputy. In another embodiment, each stationary unit acts as a radio relay station and comprises a relay transmitter (9), Fig. 2 (not shown) in addition to the receiving unit (5) and the confirmation transmitter (6), no leads between stations then being required.
Patent GB-924910-A (GB)
Title: Improvements in or relating to indexing elements for information cards stored in a pack
IPC: B42F19/00
Filed: 1961-01-10
Abstract: 924,910. Index cards. H. H. ROSS. Jan. 10, 1961, No. 1065/61. Classes 16 and 146 (1). An index card 10 of synthetic plastic material or stiff card is provided on each of a pair of opposite edges with an upstanding index tab, the distance of one index tab from one side edge of the card being different from the distances of the other index tab from the side edges of the card, whereby by suitable orientation of the index card, an index tab may, in the example shown, be positioned in any one of four positions along the top of the card. The index tabs may overlap to some extent and one of the index tabs may be positioned centrally of the edges 13, 14.
Patent GB-1463632-A (GB)
Title: Method of positioning and underpass below another roadway by  hydraulic drive-through and the constructive work obtained  thereby
IPC: E21D9/00
Filed: 1975-01-10
Abstract: 1463632 Tunnelling; underpass bridge J C GENTON and C L J BRESSO 10 Jan 1975 1182/75 Headings E1F and E1G A prefabricated underpass 29 is positioned below another traffic roadway, e.g. a railway track on an embankment, without stopping the traffic on the roadway by positioning a temporary supporting device or plating 20 which does not interfere with or disturb the track and which is designed to support the track exclusive of the momentary overloads due to the traffic, and hydraulically driving a penetration structure 26 including the prefabricated underpass 29 through the embankment, the penetration structure being provided with jacks 34, 36 which support the plating 20 and take over the momentary ovreloads at the times of passing of traffic. As described the plating 20 which supports the track consists of beams 21 positioned on each side of each rail and held in position by ties 22 (Fig. 10), the beams 21 being supported by transfer beams 23 which in turn are supported by girders 24 and vertical supports 25 (see Fig. 2). The penetration structure 26 consists of the prefabricated underpass 29 and a cutter shield 30. The structure 26 is thrust into the embankment by hydraulic jacks 27, this penetration being facilitated by action of a mining or cutting machine 31 working ahead of the structure 26. During the driving of the structure 26 any loads on the track due to traffic are transferred via the transfer beams 23 to jacks 36 carried by girders 35 on the cutter shield 30 and to jacks 34 mounted in holes 33 in the roof 32 of the underpass 29. During driving the structure 26 is guided by a device 40 (Fig. 7) mounted on the bottom of the front end of the structure 26. When the device 40 is raised earth will collect underneath the structure 26 and the structure will tend to be lifted or move upwardly and when the device 40 is lowered it will form furrows in the ground ahead of the structure which will then tend to move downwardly.  When the underpass is in position the cutter shield 30 is removed, the jacks 34 are removed and the holes 33 plugged, ballast is restored between the track and the roof of the underpass and the plating 20 is removed.
Patent GB-296974-A (GB)
Title: Improvements in continuous process for the manufacture of acetic acid in the anhydrous state, from its aqueous solutions
IPC: C07C51/46
Filed: 1928-01-13
Abstract: 296,974. Soc. Anon. des Distilleries des Deux-Sevres. Sept. 10, 1927, [Convention date]. Acetic acid is extracted from its aqueous solutions by means of a solvent having a boiling- point above that of acetic acid but below 150‹ C., such as amyl acetate, which is insoluble in water and will not form an azeotropic mixture with acetic acid, the extract being then freed from its contained water by means of an auxiliary entraining liquid such as ethyl acetate which forms an azeotropic mixture with water but not with acetic acid, and finally the dried solution is distilled to recover anhydrous acetic acid and solvent. Both solvent and entraining liquid may consist of single substances or mixtures, and the entraining liquid may be added to the solvent before or after the extraction of the aqueous acid. The aqueous acid may contain salts and organic substances such as cellulose derivatives, the latter separating out at the surface of separation of the water and solvent-acid mixture. Solvent and aqueous acid are supplied from tanks 2, 1 to an extraction column 3, water running off at the bottom by a pipe 4 and acid solution at the top by a pipe 5 to a heated column 6 to which entraining liquid is fed at the top. Water and entraining liquid vapour are taken off to a condenser 7 and the liquid separates into two layers in a vessel 8 from which the entraining liquid is returned to the column at 16 and the water escapes at 9. The dry acid solvent mixture passes by a pipe 10 to a distilling column 11, acid being condensed in a condenser 12 while the solvent runs off at 14.
Patent GB-606385-A (GB)
Title: Improvements in and relating to dynamo electric machines
IPC: H02K27/12
Filed: 1946-01-14
Abstract: 606,385. A.C. commutator machines. BRITISH THOMSON-HOUSTON CO., Ltd., and MAGGS, A. H. Jan. 14, 1946, No. 1238. [Class 35]  An A.C. motor or generator has a polyphase stator winding acting as an armature winding and a commutated winding on the rotor acting as a compensating winding effectively in series with the armature winding and inductance is connected to the windings to enable shunt exciting currents to flow in the windings with predominant effect in the compensating winding in lagging quadrature with the E.M.F.'s generated in the stator winding by the rotating flux, the compensating winding serving also as an exciting winding. As shown, each unsaturated choke 23, 24, 25 is connected between an auxiliary brush 26, 27, 28 and a mains terminal 8, 9, 10 of the armature winding 5, 6, 7 connected to the compensating winding 1 through main brushes 2, 3, 4, but alternatively each choke may be connected between tappings on each of the two adjacent armature phases. The compensating winding may have tappings brought out to a slip-ring when a neutral point for earthing is required, or the armature windings may be connected to the brushes indirectly by means of a transformer with a star-wound winding connected to the armature windings to give the neutral point, the other winding of the transformer being delta connected across the brushes. There may be a squirrel cage damping winding in the same slots as the compensating winding. According to the Provisional Specification, condensers may be across the phases of the armature winding.
Patent GB-1490262-A (GB)
Title: Circuit interrupter with magnetic induction drive opening means
IPC: H01H81/02
Filed: 1975-01-13
Abstract: 1490262 Electrodynamic protective switches WESTINGHOUSE ELECTRIC CORP 13 Jan 1975 [29 Jan 1974] 1274/75 Heading H1N A circuit interrupter has a magnetic slot motor comprising a structure of laminated magnetic material 59 having a slot 63 in which a movable contact carrier 27 can move up and down rectilinearly out of and into contact respectively with fixed contacts 33, and a magnetic holding device comprising a holding magnet 43 and a keeper 53. The arrangement is such that when the contacts are closed under normal working conditions the keeper cooperates with the magnet to hold the contacts closed against a separating force produced by the reaction between the current in the movable contact carrier and the current in the structure of laminated magnetic material, but under excess current conditions a threshold force is exceeded and the holding force between the magnet and the keeper is overcome and the contact carrier moves in the slot to open the contacts. A nylon pad 69 is used in the slot to buffer the movable contact carrier. The contacts are reclosed by insertion of a tool through an aperture 57 in the housing of the circuit interrupter to depress the keeper 53 into contact with the holding magnet 43 again. In a further embodiment, Fig. 4, not shown, there is an additional contact opening arrangement responsive to lower fault currents wherein the flux of the holding magnet is opposed by flux generated, when such fault currents flow, in a coil associated with the magnet to weaken the field of the holding magnet and allow the keeper to be moved away from it under the influence of a bias spring which also then opens the contacts. The coil associated with the magnet is excited under the control of a bimetallic strip, or manually. Alternatively the keeper can be released from the holding magnet by shunting some of the field of the magnet by a manually operated magnetic shunt. In this embodiment a further movable keeper is interposed between the first keeper and the holding magnet to enable the magnetic holding device to be reset before reclosure of the contacts.
Patent GB-377170-A (GB)
Title: Improvements in or relating to kinematograph apparatus
IPC: G03B1/42
Filed: 1931-01-14
Abstract: 377,170. Hinematograph projectors. VISIONTONE TALKING PICTURES, Ltd., 191, Wardour Street, London.-(Assignees of Proctor, B. A. ; Larchmont, New York, U.S.A.) Jan. 14, 1931, No. 1344. Convention date, Jan. 15, 1930. Void [Published under Sect. 91 of the Acts]. [Class 97 (i).] In apparatus wherein the plane of the film in the gate is vertical, the spools &c. are mounted on opposite sides Of the gate so that the film passes to and from the gate in S-shaped bends; pivoted guides may be provided respectively near the top and bottom of the gate, and movement of the lower guide due to loop contraction may release the gate. As shown, the movable part 4 of the gate turns on vertical hinges 15, and carries a projecting lens 5, and a pressure plate 33 pressed by springs surrounding pins 9 which pass through holes in the gate and are secured by split pins 11. Spring clips 34 may be provided on the fixed or movable part of the gate to facilitate threading. Film spools 19, 27 and sprockets 18,28 having pressure members 20, 29 are provided on opposite sides of the gate ; spring-pressed guides 22, 30, having flanges 24, 32, and respectively mounted on pivots 23, 31, may also be provided. The lower guide 30 may be connected to a spring member 13 normally holding the gate in closed position so that upward movement of the guide causes the detent 13 to move and release the gate. During rewinding, the film may be freed from the sprockets and gate and may pass over the guide 22.
Patent GB-800761-A (GB)
Title: Improvements in or relating to rolling blinds
Inventor: CAROZZO GIORGIO
IPC: E06B9/165
Filed: 1957-01-14
Abstract: 800,761. Lath blinds. BORLENGHI, L. Jan. 14, 1957, No. 1384/57. Class 20(3) A roller blind consists of hollow laths 1, of plastic or like material, each provided at one end of its cross-section with a flat longitudinal extension 2 ending in a bulged head 3 with edges 3a, 3b adapted to abut on to the inner surfaces of the edge 5a, 5b of a slot in the opposed end of the crosssections of the adjacent lath, the head being so shaped that due to the weight of the blind it tends to draw the edge 5a, 5b together, the lath, however, being pivotable relatively to one another on rolling up of the blind. One or more cross-pieces 4 are provided internally of the laths and openings 6 are provided in the extensions 2. In a modification, the edge 3b, 5b are set slightly below the edges 3a, 5a respectively, the laths being pivotable as shown in Fig. 6.
Patent GB-138154-A (GB)
Title: Improved protectors or the like for the soles and heels of boots and shoes
IPC: A43C15/02
Filed: 1919-01-21
Abstract: 138,154. Dobell, H. Jan. 21, 1919. Protectors, securing.- Scles and heels are provided with several equal-sized frames 4, Fig. 1, to which rubber or like pads can. be detachably fitted without removing the frames, so that as wear proceeds, the pads can be turned back to front in their own frames or be removed to other frames. A pad 4, Fig. 4, is provided with tongues 5 which can be slipped under metal frames 1 secured to soles and heels by cross-pieces 2, Fig. 2, screwed to the sole &c. The ends 3 of the cross-pieces are upturned 'to prevent the pads from slipping backwards or forwards.
Patent GB-290697-A (GB)
Title: Improvements in or relating to safety razors
IPC: B26B21/18
Filed: 1927-01-19
Abstract: 290,697. Fryers, A. Jan. 19, 1927. Razors, safety.-A safety razor blade a is formed so that when clamped in position its cutting edge is inclined to the edge of the guard f, the guard being of ordinary type with straight edge and teeth of equal length at right-angles to said edge. In one form, Fig. 3, the usual positioning holes d, e lie on a line inclined to the central line of the blade. In another form, the cutting edges are curved, being concave, convex, or waved. In a blade with a single cutting edge co-operating with positioning means, one end of said edge is cut away or shouldered, and with a single-edge blade the back of which co-operates with positioning means, the back is not parallel to the cutting edge.
Patent GB-1406913-A (GB)
Title: Water-soluble reactive dyestuffs of the monoazo series and processes for preparing them
IPC: C09B62/008
Filed: 1973-01-11
Abstract: 1406913 Water-soluble reactive monoazo dyes HOECHST AG 11 Jan 1973 [12 Jan 1972] 1559/73 Heading C4P Water-soluble monoazo dyes have the Formula (I) in which, within the dashed line, the structure may be in the enolized form or the hydrazone form, and where A, A<SP>1</SP>, B and B<SP>1</SP> each represent a benzene or naphthalene radical which may carry further substituents, W is -CN or -CONH 2 , and Z 1  and Z 2  each represents a direct bond or a bivalent bridge member, or a C 1 -C 4  lower alkylene group, and which may be identical or different, X and X 1  each represents a reactive group which may be identical or different, m and m 1  each represents 0, 1, 2 or 3, the sum of m + m 1  being at least 1, n and n 1  each represents 0, 1 or 2 and n + n 1  is at least 1 and at most 3, v and v 1  each represents 0 or 1, R represents a hydrogen atom or a lower alkyl or a lower alkyl group substituted by -OH, -COOH, -COO (lower alkyl) or -CN, the lower alkyl group containing 1-4 carbon atoms, and both R's may be identical or different, and n 2  and n 3  each represents the number 1 or 2. The compounds are made by diazotization and coupling. The dyes may be used to produce greenish yellow shades by dyeing or printing materials containing hydroxyl groups or nitrogen, e.g. on wool, silk, leather, polyamide, or polyurethane fibres or on natural or regenerated cellulose.
Patent GB-228160-A (GB)
Title: Improvements in vacuum tube oscillation generators
IPC: H03F1/13
Filed: 1925-01-19
Abstract: 228,160. Westinghouse Electric & Manufacturing Co., (Assignees of Little, D. G.). Jan. 25, 1924, [Convention date]. Thermionic generators and modulating systems. -In wireless transmission systems employing valve oscillators and modulators, resistances 14 - - 17 are connected in the grid circuits of the generating valves 4, 5 and the modulating valves 6, 7 with the object of damping parasitic disturbances due to inherent capacities. The resistances are placed close to the grids and have any value between 10,000 and 50,000 ohms. As shown in the Figure, the generating and modulating valves are connected to a common high-tension source 8 through a choke coil 9, modulation being effected according to the known choke-control method. Specifications 131,553, 187,098, 187,646, and 217,552 are referred to.
Patent GB-1317535-A (GB)
Title: Thermoelectric ignition safety device
IPC: F23N5/10
Filed: 1972-01-13
Abstract: 1317535 Burner control JOH VAILLANT KG 13 Jan 1972 [20 Feb 1971] 1679/72 Heading F4T A thermoelectric ignition safety device, e.g. for a gas water heater, is shown in the inoperative state in Fig. 1, and comprises a manual push-button 4 which when depressed against the action of a spring 10 pivots two levers 7, 8 mounted on a common pivot axis 9, the arm 7<SP>1</SP> of the lever 7 acting via a disc 20 and against the action of a spring 17 to bring an armature 3 of an electromagnet 2 into contact with the magnet wherein it is retained on release of the push-button if the electromagnet is thermoelectrically energized by the heat from a pilot flame, the movement of the arm 811 of the lever 8 acting simultaneously to open a valve supplying gas to the pilot flame, a microswitch 16 controlling the main gas valve being secured to the housing 1 of the device and provided with an actuating lever 15 such that the switch remains open if the armature 3 is not in contact with the electromagnet 2, through the action of a pushrod 18 carried by the armature 3, and the microswitch 16 being maintained open during depression of the push-button 4 through the action of a spring-loaded collar 14 carried by the push-button 4 and acting on an arm 15<SP>1</SP> of the lever 15. If the push-button 4 is released after the armature 3 is held against the electromagnet 2 by the heat from the pilot flame, then the microswitch 16 will close and open the main gas valve. A further microswitch (not shown) controlling, e.g., a circulation pump, may be disposed alongside the switch 16 so as to be actuated by the lever 15. An "off" push-button 21 is also provided which when depressed engages the arm 8<SP>11</SP> of the lever 8, and thus disengages the armature 3 from the electromagnet 2 causing the push-rod 18 to open the microswitch 16 and allowing the valve 5 to close.
Patent GB-1536979-A (GB)
Title: Structural laminate and method for making same
IPC: B29C44/30
Filed: 1977-01-17
Abstract: 1536979 Laminates CELOTEX CORP 17 Jan 1977 [19 Jan 1976 (3)] 01681/77 Heading B5N A structural laminate comprises at least one planar facing sheet, a rigid foam, formed from a foam-forming mixture, attached to one surface thereof, and a mat of glass fibres wherein the fibres are substantially evenly distributed throughout the foam, are long and straight, and are arranged in layers, each layer being substantially parallel to the facing sheet. There may be a further facing sheet on the other side of the foam. The facing sheets may be of asbestos, glass fibre, copper, brass, iron, steel or aluminium. The foam may be a polyurethane, phenolic polymer, rubber, PVC, urea-aldehyde or melamine-aldehyde resin, polystyrene, polypropylene, polyethylene, cellulose acetate, epoxy resin, ABS copolymer or a silicone.
Patent GB-1144191-A (GB)
Title: Esters of 6-aminopenicillanic acid
Inventor: BAMBERG PETER
IPC: C07D499/00
Filed: 1966-01-13
Abstract: 1,144,191. Stannyl esters of 6-aminopenicillanic acid. ASTRA A.B. 12 Jan., 1967 [13 Jan., 1966], No. 1694/66. Heading C2A. The invention comprises esters of 6-amino penicillanic acid of formula wherein each of the groups R, which may be the same or different, represent a monovalent hydrocarbon group, e.g. alkyl, aryl or aralkyl and especially n-propyl, n-butyl or phenyl. The compounds are prepared by reacting 6-aminopenicillanic acid with a compound of formula XSnR 3 , wherein R is as defined above and X is C 1-6  alkoxy, C 1-6  thioalkyl, di-C 1-6  alkylamino or hydroxy or R 3 SnO-, wherein R is as defined above. Where X is OH or R 3 SnO-, the reaction is carried out in an organic solvent, e.g. benzene, and the water produced is removed by distillation as it is formed. Where X is alkoxy &c., the reaction is in an organic solvent, such as ethyl acetate, at 60-130‹ C. Typical esters are the tri-n-butylatannyl 6- aminopenicillanate, tri-phenylstannyl 6-aminopenicillanate and tri-n-propylstannyl 6-aminopenicillanate. Penicillins are produced by acylation and removal of the ester grouping, e.g. with potassium thiophenylate in dimethyl formamide, to produce the potassium penicillin.