baber/WOPTO huggingface dataset:
Patent GB-728653-A (GB)
Title: The manufacture of chloramphenicol
IPC: C07D263/14
Filed: 1951-03-16
Abstract: Chloramphenicol is manufactured by hydrolysis of D-(+)-threo-2-dichloromethyl-4-hydroxymethyl - 5 - p - nitrophenyloxazoline or of D - (-) - threo - (p - nitrophenyl) - (2 - dichloromethyloxazolinyl-4)-carbinol, by warming with water, which may contain a trace of an organic acid, or by the action of mineral acid in the cold followed by addition of alkali in a quantity at least sufficient to neutralize the acid.  The starting materials are obtainable from L-(-)-b -phenylserine by the processes described in Specifications 728,654, 728,704, 728,705 and 728,706, or, in the case of the latter compound, from D-(-)-threo-1-p-nitrophenyl-2-amino-1 : 3-propanediol by reaction with dichloracetiminoether and isolation of the desired compound from the reaction mixture.  In examples, either of the specified starting materials is (1) heated with water containing a trace of acetic acid; or (2) dissolved in dilute aqueous hydrochloric acid at room temperature and the solution adjusted to pH 8-9 with concentrated ammonia while cooling.  In example (3), D-(-)-threo - 2 - dichloromethyl - 4 - hydroxymethyl - 5 - p - nitrophenyloxazoline is dissolved in alcoholic hydrochloric acid, the solution evaporated to dryness in vacuo at 30 DEG  C., and the residue treated with dilute aqueous ammonia.  D - (-) - threo - 1 - p - nitrophenyl - 2 - amino-1 : 3 - propanediol is obtainable by reacting DL-threo-b -phenylserine ethyl ester with acetiminoethyl ether, reducing the ester group of the resulting oxazoline compound by means of lithium aluminium hydride, acetylating the DL - threo - 2 - methyl - 4 - hydroxymethyl - 5-phenyloxazoline obtained, nitrating the acetyl derivative, hydrolysing the product to DL-threo - 1 - p - nitrophenyl - 2 - aminopropane-1 : 3-diol and resolving this by fractional crystallization of its d-tartrate.  Reference has been directed by the Comptroller to Specification 698,544.
Patent GB-854736-A (GB)
Title: Improvements in or relating to apparatus for forming a continuous tobacco filler
IPC: A24C5/18
Filed: 1957-02-26
Abstract: 854,736. Feeding tobacco. USINES DECOUFLE. Feb. 26, 1957 [Dec. 18, 1956], No. 6407/57. Addition to 764,551. Class 130 Apparatus as in the parent Specification, in which tobacco particles from a conveyer 6, Fig. 1, are carried up a smooth passage 8 by an air stream to form a cigarette filler on the underside of a perforated belt 10 through which suction is applied, is modified by the addition of oppositely rotating chamfered discs 23 having a peripheral speed slightly greater than that of the belt and which trim excess tobacco from the filler. Tobacco from a hopper 1 is delivered by a carded drum 3, acting in conjunction with a refuser drum 4 and a picker roller 5, to the conveyer 6, and excess tobacco trimmed from the belt 10 is returned to the hopper 1 by a paddle wheel 26 and belts 30, 31, 2, the wheel 26 actually being angled so as to deliver the tobacco in the direction of motion of the belt 20. The air stream and suction are caused by a fan (not shown) having an intake 17 and delivery 21. The conveyer 6 travels at 4 feet per second and the air stream at 30 feet per second. The part 9 of the passage 8 has walls diverging upwardly at 10 degrees to assist in supporting the filler on the belt 10. A frame supporting the members 26, 23 is vertically adjustable by a hand screw to vary the depth of the trimmed filler, the wheel 26 being driven via a universal joint to allow such adjustment. As shown in Fig. 2, the trimmed filler, preferably having at least half the final filler density required, is delivered to cigarette-paper web 42 which carries it through a a compression tongue 43 and rod-forming mechanism. Additional air may be drawn in between side walls 22, or be prevented from entering between them. Specifications 854,737 and 854,738 also are referred to.
Patent GB-495613-A (GB)
Title: Methods of indicating distance by wireless
IPC: G01S1/02
Filed: 1938-03-01
Abstract: 495,613. Directive wireless signalling. BERRY, R. J. (Lorenz Akt.-Ges., C.) March 1, 1938, No. 6424. [Class 40 (v)] Distances between one airport and another are marked out at intermediate points along the course by short-wave beams which are continuously swung over an arc at right-angles to the course, so as to form a zone of radiation through which the craft must pass. Each beam is modulated with a characteristic signal to indicate its position or distance along the route. The beam is projected by a rotating transmitter formed with two reflectors R1, R2 placed back-to-back, each being energized in turn as it moves up from the horizontal plane, in the direction of the arrow. The speed at which the beam is rotated may also serve to distinguish the zone of radiation by producing a tone-frequency in the receiver.
Patent GB-510735-A (GB)
Title: Improvements in centrifugal dressing machines for flour or meal
IPC: B07B1/22
Filed: 1938-03-02
Abstract: 510,735. Centrifugal machines. SIMON, Ltd., H., and SPEIGHT, J. March 2, 1938, No. 6531. [Class 23] A centrifugal dressing machine for separating flour and meal from crushed cereal products has a sieve barrel constructed in skeleton form with longitudinal bars a and circumferential ribs c to hold them in place. The bars a may be flat, or channelled and provided with felt to receive the sieve frames d which are clamped to them. The side d<1> of each frame is of channel section so that the edge of the silk material used for the sieve or of the reinforcing material attached to it, can be passed into the channel and held by wedges e. The frame segments may form a circular or polygonal cross section. The silk covered sieve may revolve at a low speed while the internal beater system revolves at a high speed.
Patent GB-212932-A (GB)
Title: Improvements in casting machines for the manufacture of tubular metal articles by centrifugal force
IPC: B22D13/10
Filed: 1923-09-04
Abstract: 212,932. Soc. Anon. MÚtallurgique d'Aubrives et Villerupt. Sept. 5, 1922, [Convention date]. Castings; casting-machines; moulds. - The inner face of a pipe, for instance, being cast in a centrifugal mould is smoothed bv a co-axial mandrel 13 rotating with the mould. The mandrel is carried bv a rod 14 which is rotated bv grooves engaged by sliding feathers 18 carried by arms 16 adjustably secured to the mould. Axial movement of the rod 14 is. prevented by collars 20 on either side of the'bearing 15 so that the mandrel remains adjacent to the pourer 7 during the axial movement of the mould.
Patent GB-1203387-A (GB)
Title: Improvements in or relating to hammocks
Inventor: FOSTER EDWARD RICHARD
IPC: A47C3/02
Filed: 1968-02-10
Abstract: 1,203,387. Suspended garden seats. ARNEX PRODUCTS Ltd. 12 May, 1969 [10 Feb., 1968], No. 6690/68. Heading A4J. A garden hammock seat 23, suspended from a frame 10, has an awning including at least one roller blind 19. Springs 22 are optionally used in the suspension systems and the back 28 of the seat may fold over it for weather protection. The back and seat are both detachable and may be used separately, on legs 27 that also prop up the seat as shown. The frame 11 vertically pivots about 14.
Patent GB-230839-A (GB)
IPC: F16G13/04
Filed: 1925-03-12
Abstract: 230,839. Autok Akt.-Ges. Fabrik f³r Triebketten. March 13, 1924, [Convention date]. Chain - wheels. - In gearing wherein a driving-chain of the silent type has tooth faces c formed behind the joint pins in addition to the usual tooth faces b, d on the front side, whereby the chain is enabled to gear with sprocket wheels on both faces, a sprocket wheel adapted to engage the rear side of the chain comprises a number of toothed discs g, h, Fig. 3, secured together so that the teeth in adjacent rows are staggered, the pitch of the teeth on each disc being twice that of the teeth of the wheel engaging the front side of the chain.
Patent GB-798537-A (GB)
Title: Improvements in or relating to electric thermostats
IPC: G05D23/275
Filed: 1957-02-28
Abstract: 798,537. Thermal switches. PETERCEM. Feb. 28, 1957 [March 15, 1956], No. 6731/57. Class 38 (5). A miniature thermostat comprieses a bimetallic strip 10, the major part of which is pressed against an elongate thin metal casing 11, and a bowed strip 9 forming the moving contact which is mounted between a support 7 and the face end of the bimetallic strip 10. Rise in temperature causes the bimetallic strip to move upwardly and the bowed strip to snap over from the fixed contact formed in the end of the conductor 2 to the fixed contact formed in the end of the conductor 4. The parts are mounted in a holder 1 having folded-in edges la, lb. The edge 1b presses the bimetallic strip 10 against the outer casing and also secures, together with a folded-in portion 1c, the conductor 2. Further folded-in portions 1d, le serve as supports for the conductor 4 and adjusting screws 8 for the support 7 respectively. The bowed strip 9 forming the moving contact is connected to the external circuit by a conductor 13 soldered to the outer casing. The ends of the casing may be sealed with " Araldite " (Registered Trade Mark).
Patent GB-874279-A (GB)
Title: Improvements relating to the loading of aircraft
Inventor: LOBELLE MARCEL JULES ODILON
IPC: B64D9/00
Filed: 1959-02-26
Abstract: 874,279. Lift trucks for transferring freight containers to and from aircraft. M.L. AVIATION CO. Ltd. May 26, 1960 [Feb. 26, 1959], No. 6762/59. Classes 78 (3) and 78 (4). [Also in Group XXV] The base member 10 of the parallelogram lifting linkage 8, 9, 10 of a lift truck is automatically maintained at a fixed distance from the loading door 14 of an aircraft by arms 11 which engage recesses 13 in the fuselage and which are supported by an hydraulic positioning ram 15, 16. In operation, wheeled pallets 4 are rolled along guides 6 on a trailer 5 on to rail section 7 supported by the lifting platform 8 which is then raised to the loading opening, by means of an hydraulically operated ram 22, whereafter hydraulically operated lazy tongs 25 move the rail section 7 with the pallet 4 on to rollers 28 in the aircraft to a position in which the pallet abuts a stop 29. In this position, a loading catch (not shown) on the underside of the pallet is engaged by a pawl 34 of a driving member 35 movable along a central guide 31 by an endless wire rope 36 passing around an air motor driven pulley 38. The pallet is thus driven along guides 30, 32 to its storage position 40 at the end of the guides where it abuts a buffer which, through a system of linkages, operates a claw (see Group XXV) to hold the pallet in position and also causes the loading catch to be retracted by the pawl 34 so that the driving member 35 can continue to the end of the guides where it operates a valve 56, in a pneumatic system (Fig. 4, not shown), which changes the direction of rotation of the air motor to return the driving member 35 along its path. When the driving member reaches the limit of its forward travel it operates a valve 57 which again changes the direction of the air motor so that the pawl 34 engages in the loading catch of the next pallet elevated by rail section 7. The claw to hold the pallet in its storage position is actuated when this second pallet abuts the first. The driving member will only move from its forward position if a pallet and the rail section 7 are moved into the opening 14 to actuate valves 58 and 59. To unload the aircraft, a selector valve in the pneumatic circuit is actuated to move the driving member 35 to the rear end of the guide 31 and to retract pawl 34 and raise pawl 61. A thrustor 127 is actuated to withdraw the claw holding the most forward pallet and on the return movement of the driving member 35 pawl 61 engages in an unloading catch (not shown) on this pallet. The unloading catch is operated in a similar manner to the loading catch described above. The claws holding the succeeding pallets are retracted successively by actuation of the thrustors 137, 142, 152. The pallets in their storage position are held steady by means of the claws, guides 30, 32 and further rollers engaging slots 32a in the side of guides 30, 32.
Patent GB-1454349-A (GB)
Title: Educational apparatus
IPC: G09B7/02
Filed: 1974-02-15
Abstract: 1454349 Educational apparatus; sound producing instruments L J GREENBERG and G. E. HYMAN 15 Feb 1974 [21 Feb 1973] 6999/74 Headings G5G and G5J An educational apparatus comprises a housing 101 incorporating a keyboard (20) Fig. 4 (not shown) and a battery-operated tone generator (30) Fig. 2 (not shown) for producing a desired tone through a loud-speaker 34 in response to the actuation of a corresponding key such as 20a; a series of problem cards each carrying thereon different problems in the form of symbolic representations such as words Fig. 6 (not shown) or arithmetical sums Fig. 8 (not shown); and a plurality of interchangeable key-board cards carrying other symbolic representations such as pictures 41a which are related to but of different kind to the representations on an associated problem card. In use, a keyboard card is positioned on the housing 10<SP>1</SP> so that it overlies the keyboard (20) and the problems on the problem card are then attempted. The arrangement is such that the proper solution of each individual problem by actuation of the key corresponding to the correct answer symbol on the keyboard card, in the sequence shown on the problem card, will result in the production of a series of tones which together make up a well-known melody.
Patent GB-1011882-A (GB)
Title: Improvements relating to pattern recognition devices
Inventor: INGHAM WILLIAM ELLIS
IPC: G06V10/88
Filed: 1961-02-25
Abstract: 1,011,882. Character recognition apparatus. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 26, 1962 [Feb. 25, 1961], No. 7000/61. Heading G4R. In character recognition apparatus using mask matching to derive simultaneous signals representing the match between the unknown character and a number of character masks, there is subtracted from each signal the average of all the signals to increase the difference between them and enable the highest to be more easily identified. Characters on a moving paper 1, Fig. 2, are focused on to the photo-cathode of a tube 13 which converts the image into an electron pattern and focuses it on to an electroluminescent screen 7 on which it is reconverted to a light pattern and focused on to a series of masks 8. The electron beam is oscillated vertically inside the tube 13 so that the image is swept over the mask in a vertically oscillating path and a condition of exact registry with the pattern on the mask occurs in spite of lack of registry of the character on the paper 1. A maximum output is derived from the corresponding photo-cell 12 at the instant of exact registry. The single character is converted into several images by using several tubes 13, by a multiple array of lenses or by an arrangement of half-silvered mirrors. The mask may consist of a mirror surface with a shaped opening, an additional photo-cell receiving light reflected from the face of the mask to provide a " non- match " signal. This signal, will be zero or a minimum for a match. Alternatively, positive and negative masks may be used, the light being equally divided by a half-silvered mirror. In order to compare the signals from the several photo-cells to find the highest they are first normalized by adjustable gain amplifiers and the mean value is found by applying all signals through resistors to a common point and this average value is subtracted from each signal and the highest remainder identifies the character. Where positive and negative masks are used the resulting signals are subtracted, the largest difference identifying the character. The signal from the positive mask comes from the surrounding parts of the character. This may be shaped as shown in Fig. 9 to embrace the area covered by all the characters superimposed. In Fig. 10, the outline is shaped to compensate for vertical displacement of one or more characters, e.g. the " 6 and " 9." Alternatively, the positive masks are replaced by a mere outline shape as in Fig. 11 which is used to derive a mean signal for comparison with the negative mask signals as before.
Patent GB-589219-A (GB)
Title: Improvements in or relating to devices for laterally supporting elongated members while under longitudinal compressive stress
IPC: B21D37/10
Filed: 1945-03-20
Abstract: 589,219. Nailing tools. FITZMAURICE, J. C., and BIDWELL, W. F. S. March 20, 1945, No. 7018. [Class 89 (iii)] [Also in Groups XXII, XXIII, XXV and XXVI] An elongated member to which longitudinal compressive stress is applied is supported against bending by a structure which includes a tubular guide or barrel and a floating, spring-supported plate or washer which engages the member intermediate of its length. As applied to the support of a nail during driving, the driving tool comprises a driver D, Fig. 1, with an impact head D<2>, and a barrel A with an end closure plate A<2> formed with a central aperture A<3> which is a close fit on the nail B. The floating washer C is supported by springs C<4>, C<3>. During driving, the nail is supported by the aperture A<3> and by a recess D<1> in the lower face of the driver, and at an intermediate point by the washer C. In a modification, several washers C are spaced along the barrel. The driver is removable so that the number of washers may be varied in order to vary the extent to which the nail projects from the work after driving, or so that washers having differently arranged apertures, e.g., for driving several nails simultaneously, may be substituted. The extent of projection of the nail may be varied by providing a stop on a screw-threaded part of the driver and/or by providing means, e.g., a grub screw, . for varying the depth of the recess D<1>, or by inserting washers between the driver and the uppermost spring. After partial driving, the nail may be fully driven by removing the washers and springs from the barrel. The driver may lie wholly within the barrel and be struck by a separate punch. The end plate A<2>, which may be detachable, may have an extended flange or separate feet to engage the work. In other modifications, a brake or a pressure spring prevents rebound of the driver after it has been struck. As applied to a rock drill, Fig. 5, or for driving a threaded nail, a barrel K' applied to the drill L has a stud M<2> engaging a helical groove M' in an anvil M movable within the barrel. The anvil has a recess to receive the head L' of the drill shank L' and is engaged by the striker L<2> of the drill.
Patent GB-235641-A (GB)
Title: Improvements in or relating to the smelting of metalliferous materials, particularly oxidised copper compounds
IPC: C22B1/245
Filed: 1924-03-19
Abstract: 235,641. Hoal, J. C., and Metals Production, Ltd. March 19, 1924. Agglomerating processes; dry processes of extracting and refining copper and other metals.- Wet metalliferous materials, particularly oxidized copper compounds, such as the precipitate obtained by the process described in Specification 185,242, [Class 39 (i), Electric lamps, Arc &c.], are uniformly mixed, either with or without previous dewatering, with a liquid combustible binding medium such as wood tar or coal tar, so that they become coated with binding medium and agglomerated so as to be readily separable from the water. The prepared material, after separation from water by draining, pressing or otherwise, may be fed directly to a smelting furnace, yielding, in the case of the copper precipitate above referred to, a copper containing some cuprous oxide; this can be further purified by poling. Specification 215,845 also is referred to.
Patent GB-483525-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04M5/04
Filed: 1937-03-11
Abstract: 483,525. Electromagnetic relays. GENERAL ELECTRIC CO., Ltd,. and STEAD, H. March 11. 1937, No. 7134. [Class 38 (v)] [Also in Croup XXXIX] A telephone substation is provided with a key C which connects an interrupting relay A across the line to flash the operator's lamp. The relay A has two windings, the upper being of much less resistance than the lower, and two contacts of which a<1> operates more quickly than a<2>, the corresponding armatures 8, 9 being of different surface areas. The low resistance winding alone is not strong enough to maintain a<2> closed. When the key C is operated, a<1> closes and remains closed until a release key R is operated, while a<2> intermittently shortcircuits the high resistance winding and thereby flashes the lamp L, either directly or through a relay.
Patent GB-1493677-A (GB)
Title: Process for the recovery of protein having solution clarity
IPC: A23L2/66
Filed: 1975-02-20
Abstract: A protein having improved solution clarity at acid pH, suitable for the protein enrichment of acidic beverages, is isolated by treating a protein-containing aqueous solution with a phosphate, as a result of which a protein-phosphate complex is formed, adjusting the pH of the solution to 6 to 8 by addition of a base, separating off the precipitate formed during this from the pretreated protein-containing aqueous solution and mixing the latter with a polyphosphate of medium chain length. The pH of the protein-phosphate-complex-containing solution formed in this is adjusted by acid to 4.5 to 2.0, as a result of which the protein-phosphate complex is precipitated out. This is separated off from the supernatant solution and dispersed in water having a final pH of 5.0 to 12.0. The resulting dispersion is then brought into contact with an anion exchanger resin and the protein-containing solution eluting is isolated.
Patent GB-217882-A (GB)
Title: Improvements in the manufacture of fuel alcohol and in apparatus therefor
IPC: B01D3/00
Filed: 1924-03-20
Abstract: 217,882. Henneberg, G., and Charpentier, M. H. June 20, 1923, [Convention date]. Void [Published under Sect. 91 of the Act]. Addition to 213,526. Liquid fuel. - In the preparation of a fuel comprising a solution of acetylene in acetone and alcohol dehydrated by calcium carbide, the apparatus described in the parent Specification is modified by use of a series of heaters and dehydrators. B, D<1> - - B<3>, D<4> arranged in cascade to the stills F, G, and by use of tanks Z<1>, Z<3> in which the lime settles out before the alcohol passes to the next dehvdrator. The lime is conveyed by screws f to channels c leading to a still in which the alcohol is recovered.
Patent GB-525987-A (GB)
Title: Improvements relating to coal-cutting machines
IPC: E21C35/20
Filed: 1939-03-04
Abstract: 525,987. Coal-cutting machines. ANDERSON, A., and ANDERSON, BOYES & CO., Ltd. March 4, 1939, No. 7188. [Class 68 (i)] In a coal-cutting machine of the cutter chain type provided with a cutting-sweeping device including at least one conveyer screw rotatable about a substantially vertical axis adjacent to the driving sprocket of the cutter chain and adapted to collect the cuttings and raise them for discharge in a direction away from the cutters, the screw 4 conveys upwardly and is housed in a conical housing 7 with a lateral inlet 8, discharge occurring at 9. The screw is carried by a boss 10 secured to a driven spindle in a bracket 12 attached to the machine, and has its lower end substantially level with the base of the machine ; if only one screw is provided its axis is preferably in the longitudinal central plane of the machine. The cutting-sweeping device or devices may be adjustable transversely in a rectilinear, arcuate or other path.