baber/WOPTO huggingface dataset:
Patent GB-715122-A (GB)
Title: Process for preparing threo-1-ú­-nitrophenyl-2-acylamino-1, 3-propanediols
Filed: 1951-05-30
Abstract: The invention comprises threo-1-p-nitrophenyl - 2 - acetylamino - 3 - acetoxypropan - 1-ol, threo - and D - threo - 1 - phenyl - 1 : 3 - bis-dichloracetoxy - 2 - aminopropane hydrochlorides, and a process (in which they may be intermediate products) for preparing threo-1-p-nitrophenyl - 2 - acylamino - 1 : 3 - propanediols (the term "acyl" denoting -COR where R is alkyl or haloalkyl) wherein threo-1-phenyl-2-acylamino - 3 - acyloxypropan - 1 - ols are first transformed into the corresponding threo-1-phenyl - 1 : 3 - diacyloxy - 2 - aminopropane hydrochlorides by treatment with a solution of gaseous hydrochloric acid in an anhydrous solvent at 0-30 DEG  C., and the products are nitrated at temperatures below 0 DEG  C. and alkalized to effect migration of one acyl group to the N-position and subsequent or simultaneous alkaline saponification of the remaining O-acyloxy group.  The simultaneous migration and saponification may be effected by alkalizing the diluted nitration mixture, or the diacyl compounds isolated therefrom, to a pH above 8 at 0-40 DEG  C., if desirable in the presence of a water-miscible organic solvent. The alternative two step process is effected by alkalizing first to a pH between 7 and 8 to produce an N : O3-diacyl compound, which is then saponified at a pH above 8.  In examples (1) threo-1-phenyl - 2 - acetylamino - 3 - acetoxypropan-1-ol dissolved in ethanol and dioxane is allowed to stand with ethanolic hydrochloric acid, ether is added to precipitate threo - 1 - phenyl - 1 : 3-diacetoxy - 2 - aminopropanehydrochloride, this is treated with fuming nitric acid free from nitrous acid, the nitration mixture is poured on ice and alkalized with sodium carbonate, and the resulting threo-1-p-nitrophenyl-2-acetylamino - 3 - acetoxypropan - 1 - ol is isolated and saponified with aqueous caustic soda to threo - 1 - p - nitrophenyl - 2 - acetylamino-1 : 3 - propanediol; (2) threo - 1 - phenyl - 2-dichloracetylamino - 3 - dichloracetoxypropan-1-ol dissolved in dioxane and ether is allowed to stand with a solution of hydrochloric acid in ether, the resulting threo-1-phenyl-1 : 3-bis-dichloracetoxy - 2 - aminopropane hydrochloride nitrated as in (1), and the nitration mixture is poured on ice and alkalized with caustic soda with the addition of acetone, producing threo-1-p - nitrophenyl - 2 - dichloracetylamino - 1 : 3-propanediol; (3) D-threo-1-phenyl-2-dichloracetylamino - 3 - dichloracetoxypropan - 1 - ol is similarly converted to D-threo-1-phenyl-1 : 3-bis - dichloracetoxy - 2 - aminopropane hydrochloride, which is nitrated and the product converted to chloramphenicol by the procedure of (1) or with isolation of the intermediate D-threo-1 - p - nitrophenyl - 1 : 3 - bis - dichloracetoxy-2-aminopropane nitrate which is dissolved in acetone and further treated as (1) or (2).  Specification 707,571 is referred to.
Patent GB-831071-A (GB)
Title: Analgesic compounds
Inventor: MARSHALL PHILIP GUY
IPC: C07C271/06
Filed: 1956-04-26
Abstract: Carbonates of phenols which are substituted with alkyl or alkoxy groups containing from one to three carbon atoms are prepared by reacting the substituted phenol with an alkali metal cyanate, e.g. sodium cyanate, and trichloroacetic acid in a solvent, e.g. carbon tetrachloride or by reacting the substituted phenol with phosgene and caustic alkali followed by treatment with ammonia.  Specified carbamates are those of meta-cresol having a melting-point of 135 DEG to 137 DEG  C., o- and p-cresol, 2 : 3-, 3 : 4-, 2 : 4- and 2 : 5-dimethylphenol, 2 : 3 : 4-, 2 : 3 : 5-, 2 : 4 : 5- and 3 : 4 : 5 - trimethylphenol, 2 : 3 : 4 : 5 - tetramethylphenol, meta-ethyl- and meta-n-propylphenol, ortho-, meta- and para-methoxyphenol, ortho - alkyl - phenol, 2 - n propyl-phenol, 2 - n - propyl - 3 : 5 - dimethyl - phenol, 3 - methyl - 4 - ethyl - and 3 - methyl - 4 - n - propyl - phenol, 2 - ethyl - 5 - methyl - phenol, 2 - ethyl - 3 : 5 - dimethyl - phenol, 2 - ethyl - 4:5 - dimethyl - phenol, 3 - ethyl - 5 - methylphenol, 4 - ethyl - 2:5 - dimethyl - phenol, p-isopropyl - phenol, 2 - n - propyl - 5 - methyl - phenol and a - and b -naphthol. Specification 761,817 is referred to.ALSO:A therapeutic preparation contains a carbamate of a substituted phenol, the substituent or substituents being alkyl or alkoxy groups containing from one to three carbon atoms, admixed with a non-toxic, inert non-aqueous liquid or an inert solid substance.  The carbamate, examples of which are listed, may be substituted in the meta position to the carbamate residue, and may have at least one free position ortho to the carbamate residue.  The preparation, which may contain from 5 to 95% carbamate, may take the form of a tablet or capsule for oral administration, or an injectable solution or dispersion. Specified nonaqueous liquids are vegetable and mineral oils, e.g. arachis and paraffin oil, and polyoxyethylene glycols, and solid substances specified are starch, lactose, acacia gum, talc and magnesium stearate.  Specification 761,817 is referred to.
Patent GB-115358-A (GB)
Title: Improvements in Cylinder-flat-forme Letter-press Printing Machines.
Inventor: WINKLER CARL
IPC: B41F3/52
Filed: 1917-09-08
Abstract: 115,358. Winkler, C. Sept. 8, 1917. Cylinder machines.-In a letterpress printing- machine of the cylinder flat forme kind, the forme or force-carrier is heated electrically in order to decrease the adhesion of the ink or colour to the forme and thereby to obtain better prints and permit of the machine being run at a higher speed. As shown, a number of heating-coils f are arranged in the forme-carrier a and are connected with contacts e which, during the reciprocations of the carrier, slide on contact rails d, d<1>, d<2>. The coils f may be connected in parallel to heat the forme rapidly to the desired temperature, after which the coils are connected in series so that the temperature may be maintained by a weaker current.
Patent GB-653911-A (GB)
Title: Improvements in optical projection apparatus
Inventor: VINALL DOUGLAS LIONEL
IPC: G03B27/62
Filed: 1948-05-11
Abstract: 653,911. Optical projectors: photographic enlargers. RACE FINISH RECORDING CO., Ltd. May 11, 1948, No. 12933. [Classes 97 (i) and 98 (i)] A carrier for a transparency, and a guide for the carrier, are formed respectively with in. clined longitudinally extending surfaces and spring - pressed mem. bers which co-operate with the surfaces tc locate the carrier transversely in the guide while permitting longi. tudinal movement. The guide may have a lateral opening into which the carrier is introduced for location against the bottom of the opening. In the form shown, the carrier comprises a part 1, with flanges 1<SP>1</SP> between which a film is placed, and a part 2 with ribs 3 which engage the film margins. The guide comprises upper and lower plates 4, 5 secured in spaced relation determined by a portion 6 along one edge. The plate 5 carries the projection lens 8 and the plate 6 the condenser lens 9. Each of the longitudinal grooves 10, 11 in the carrier is engaged by two spaced spring-pressed balls 12 carried on the plate 6. This engagement may itself locate the holder or may produce a sideways thrust to locate the holder against the member 6.
Patent GB-713588-A (GB)
Title: Improvements in or relating to a sewing machine attachment
IPC: D05B21/00
Filed: 1952-05-22
Abstract: 713,588. Ratchet gearing.. GREIST MANUFACTURING CO. May 22,1952 [June 13, 1951], No. 12984/52. Addition to 673,517, [Group VII]. Drawings to Specification. Class 80 (3) [Also in Groups VII and XXV] In a ratchet gear with a masking ratchetwheel to secure periodic action, for use in a sewing-machine attachment, the pawl tooth engaging the masking ratchet-wheel is longer than that engaging the driving ratchet-wheel, and the two wheels are the same except for deeper notches at intervals in the masking wheel to allow action of the gear. The masking wheel is held by a snap-fastener engaging a head on a reduced end of the spindle, to permit its ready detachment for replacement by another masking wheel giving a different pattern of action.
Patent GB-1136909-A (GB)
Title: Improvements in containers
Inventor: FOOTE BERNARD COURTENAY
IPC: B65D81/32
Filed: 1965-03-26
Abstract: 1,136,909. Collapsible containers; packaging inter-reactive materials. BILIPAK Ltd. 25 March, 1966 [26 March, 1965], No. 12985/65. Addition to 1,014,006. Headings B8C, B8D and B8K. Two or more containers as disclosed in the main specification each containing a separate material e.g. epoxy resin, dyestuff, are provided with a common pipe or conduit enabling the materials to be mixed by squeezing the containers. The pipe may be used as a nozzle to dispense the material when mixed.
Patent GB-580610-A (GB)
Title: An improved current transformer
IPC: H01F38/28
Filed: 1944-07-07
Abstract: 580,610. Transformers. LANDIS & GYR SOC. ANON. July 7, 1944, No. 13004. Convention date, July 13, 1943. [Class 38 (ii)] A current transformer for high primary currents supplies measuring instruments through an intermediate transformer, the primary turns of which are at the same time part of the secondary turns of the main transformer, so that the total number of turns of the windings needed is reduced. The primary bar 1 passes through a core 2 on which are wound secondary turns 3, some of which are also wound round the core of an intermediate transformer 4 to form a primary winding, the secondary winding 5 supplying' the measuring instrument. The cores may be made in one unit. In a modification, primary bar conductor 1 passes through the cores of both the main and intermediate transformers, the windings being so connected that the current supplied to the instrument by the latter is the resulting difference between that induced in the intermediate transformer by the bar winding, and that induced by those turns of the secondary winding of the main transformer which are also wound round the intermediate transformer core.
Patent GB-706040-A (GB)
Title: Improvements in or relating to lifting jacks
Inventor: SMITH HARRY
IPC: B66F3/16
Filed: 1951-06-01
Abstract: 706,040. Screw jacks. SMITH'S JACKING SYSTEMS, Ltd. May 20, 1952 [June 1, 1951], No. 13103/51. Class 78 (3) In a screw jack, the screw 15 is rotated by bevel gears 22, 31 located in a housing 25 which has a bifurcated lug 37 loosely engaging a pin 38 secured to the screw support 12 in such a manner that the housing is prevented from rotating relative to the support, but is capable of limited movement in other directions. In a modification (not shown), the lug 37 has a hole loosely surrounding the pin 38. The support 12 may be secured to the top of a tube which surrounds the screw, but, as shown, it is secured to the top of a pair of converving legs 10, the lower spaced ends of which are joined by a member 13 which supports the lower end of the screw through a ball 16. In a modification (not shown) the screw is freely suspended from a ball race carried by the plate 12, and the ball 16 is dispensed with. A bracket 35, welded to the interior of housing 25, has bearing holes 35a, 35b for the screw, and bevel wheel spindle 30, respectively, but, in a modification (not shown) this bracket is replaced by a boss integral with the housing. Pivoted to the nut 17 at 19 is a member 18 adapted to engage a socket in the motor vehicle to be lifted ; a pin 20 limits the upward movement of member 18. Specifications 625,500 and 638,842 ' are referred to.
Patent GB-593202-A (GB)
Title: Improvements in coupling arrangements for coupling an external circuit to a high frequency electrical resonant chamber
IPC: H01P7/06
Filed: 1945-05-25
Abstract: 593,202. Electric resonators; radio signalling; testing radar. WESTERN ELECTRIC CO., Inc. May 25, 1945, No. 13204. Convention date, April 27, 1944. [Classes 40 (iii) and 40 (v)] A cavity resonator for use as an echo box in testing radar can be coupled to or decoupled from a feeder by insertion or removal of a loop or probe, and the tuning may be automatically wobbled. The resonant cavity 1, silver-coated internally, is coupled to a feeder 29 by a loop 34 (or a probe, Fig. 7, not shown) which enters a slit 37 when a block 30 on which it is mounted is pressed upwards and clamped with a butterfly nut 40. When the nut is released, the loop is extracted by the action of the spring 39. Alternatively, the block 30 may be pushed up by the action of a remotely-controlled solenoid, Fig. 3 (not shown) ; or it may be carried by a pair of parallel springs, Fig. 5 (not shown), and remotely controlled by a solenoid. A similar coupling 44 may feed a rectifier 48 and meter 49 for the purpose of wave-metering, and the two couplings may be located on a diameter, as shown, or on the radii of a quadrant, Fig. 6 (not shown). When the resonator is used as an echo box for testing a radar equipment (" object-locator "), the resonator is set ringing by a pulse received by the dipole 27 which thereafter continues to emit radiation during the ringing time of the resonator ; this time may correspond to a range of 2 miles. When the device is to be used on an aeroplane, the frequency may be wobbled through a range of 10 Mc/s. by a motor-driven crank-pin 23, which reciprocates the piston 7 by means of the twisted metal strap 24. The mean frequency may be varied through a range of 100 Mc/s. by causing the frame 12 which carries the motor 22 to turn about the pivot 11, a screw 16 with graduated head 19 being provided for the purpose.
Patent GB-1003322-A (GB)
Title: Improvements in or relating to radiation pyrometers
Inventor: LAND THOMAS
IPC: G01J5/12
Filed: 1962-04-06
Abstract: 1,003,322. Radiation pyrometers. LAND PYROMETERS Ltd. May 30 1963 [April 6,1962], No.13234/62. Heading G1A. Zero drift due to temperature variations of a pyrometer head A are compensated by connecting in series with the pyrometer thermopile 2a thermistor 4, and a metallic resistor, 5, the resistance of the thermistor at 20‹C. being from 10 to 15 times that of resistor 5. Radiation from the source being investigated is focussed on the thermopile 2 which is shunted by a nickel resistor to compensate for changes in cold function temperature. The resistance values of thermistor 4 and resistance 5 are so chosen that the change in potential drop across the combination with temperature exactly balances the change in e.m.f. produced by the thermopile. The head output is connected by copper leads 1 to a bridge circuit B including a self balancing potentiometer 7, 8 the motor 9 of which driving a temperature recorder. Correction for non- unity emissivity of the source is effected by resistor R 5 . In a modified circuit, Fig. 2 (not shown) the potential divider R 7 R 8  is eliminated.
Patent GB-132898-A (GB)
IPC: C03B7/20
Abstract: 132,898. Olsen, S. D. Oct. 3, 1918. Delivering molten metal.-Relates to an automatic feed for machines for making glassware, and consists in receiving the stream of metal in a water-cooled cup, which can be turned over to deliver the charge of metal into an inverted parison mould. Thus, the hottest portion of the charge is delivered into the lower or neck portion of the parison mould. The cup a receives the metal from the tank extension b, the supply being cut off at intervals by a blade c. The blade works in conjunction with a small auxiliary cup n, in which the metal collects while the cup a is being inverted. The cup a is water-jacketed, the inner lining which makes contact with the glass being made of carbon, cast-iron, &c. The cup is mounted on a shaft o, which is turned through a half-circle by a rack d attached to a piston in a cylinder d', to bring the cup into the position shown in dotted lines, so as to deliver the charge of metal into the parison mould f. The piston is operated by compressed air or steam and is controlled by a valve, the rod i of which is connected to an arm k actuated 'by the machine for making the ware. A finger h is fitted to the outer end of the rod k, and, when the rod is lifted in order to cause the inversion of the cup a, the finger trips a latch l and allows the blade c to be closed by a spring. The latch l is pivoted to the upper end of an arm p, which is rotatable in the shaft o. A stop on the shaft o alternately makes contact with shoulders in the arm p, so that the arm is moved backwards to bring the latch behind the blade c, and then moves the blade to permit a resumption of the flow of metal when the cup is again in the filling position.
Patent GB-474833-A (GB)
Title: Improvements in or relating to packing cases or the like
IPC: B65D5/48
Filed: 1936-05-11
Abstract: 474,833. Packing - cases. THOMPSON & NORRIS MANUFACTURING CO., Ltd., and PRIDEAUX, G. E. May 11, 1936, No. 13295. [Class 18] A packing case or tray of corrugated fibreboard &c. of the kind known as an " opentop tray," for bottles &c., has a part thereof 6 which is made to extend into or occupy an empty space or compartment to indicate that the same is intentionally not occupied by a bottle &c. The part 6 may be integral with either a longitudinal partition member 3 or a transverse partition member 4. The case may comprise more than one layer, horizontal division members 2 being fitted. The construction is stated to afford protection against pilfering.
Patent GB-1208978-A (GB)
Title: Small particle size z-14 zeolite and method of making
IPC: C01B33/46
Filed: 1968-03-19
Abstract: 1,208,978. Zeolites. W. R. GRACE & CO. 19 March, 1968 [21 April, 1967], No. 13307/68. Heading C1A. Zeolite Z-14 having a particle size of 20-200 millimicrons by mixing a solution of sodium silicate or metasilicate at - 9‹ to 10‹ C. with an aluminate solution at - 9‹ to 10‹ C. made by mixing sodium aluminate with sodium hydroxide in a controlled amount of water, the proportions in the mixture being such as to provide an initial slurry having mole ratios within the general range 7-13 Na 2 O : 4-6 SiO 2  : Al 2 O 3  : 275-450 H 2 O; ageing the slurry for at least 15 hours, refluxing for 5-7 hours and separating the zeolite Z-14 formed, the initial mole ratios, ageing time and refluxing time lying within one of the ranges A, B or C (for sodium silicate) or D or E (for sodium metasilicate) where the ranges are: A: Initial slurry mole ratio: Ageing time at least 15 hours; reflux time 5-7 hours. B: Initial slurry mole ratio: Ageing time at least 15 hours; reflux time 5-7 hours. C: Initial slurry mole ratio: Ageing time at least 40 hours; reflux time 5-7 hours. D: Initial slurry mole ratio: Ageing time at least 18 hours; reflux time 5-7 hours. E: Initial slurry mole ratio: Ageing time at least 40 hours; reflux time 5-7 hours. The zeolites produced have a general formula The sodium in the zeolite may be replaced by other cations.
Patent GB-598972-A (GB)
Title: Improvements in or relating to suction cleaners
IPC: A47L9/32
Filed: 1945-05-28
Abstract: 598,972. Suction cleaners. STEVENS, A. H. (Eureka Vacuum Cleaner Co.). May 28, 1945, No. 13318. [Class 8 (i)] [Also in. Group XXIII] A propelling handle of a wheel-supported suction cleaner is mounted to allow of downward and rearward arcuate movement between its propelling and vertical parked positions, and in the parked position it is automatically locked by a spring-urged element movable relative to the handle engaging a locking element carried by the handle; the handle being released by downward pressure when in its parked position and serving when in the latter position to enable the cleaner to be lifted without relative movement of the handle. The locking elements of a suction cleaner handle 18 comprise a hook-shaped keeper 48 formed at the upper end of a link 50 pivoted about an axle 22 mounted on a leaf spring 24, and a pin 46 secured to one of two side walls forming a handle socket 28 pivoted to a bracket 34 secured to the cleaner casing 26. A stop pin 44 limits the arcuate movement of the handle which is biassed by a spring 38, and a stop 58 on the link 50 engages the undersurface of a plate 60 to limit the downward movement of the casing 26. A latch 64 of another link 62 also pivoted about the axle 22 engages the upper surface of the plate 60 to prevent vertical movement of the rear end of the cleaner when the handle is in the propelling position.
Patent GB-1111557-A (GB)
Title: A centrifuge
Inventor: DAHLBERG BENGT INGMAR
IPC: B04B1/08
Filed: 1967-03-22
Abstract: 1,111,557. Centrifugal separators. ALFALAVAL AKTIEBOLAG. 22 March, 1967 [24 March, 1966], No. 13375/67. Heading B2P. In a centrifuge for separating two liquid components from each other, one of the components being highly viscous, the outlet for one of the components is hermetically connected to a stationary pipeline 7 in which is inserted a displacement pump 8 whose throughput capacity can be adjusted during operation of the centrifuge. The pump 8 which may be of the motor-driven gear type and may be controlled by a known device 9, is preferably inserted in the outlet pipe for that component which is present in a smaller quantity. When treating a glucose-containing corn starch hydrolysate, for example, a glucose-containing heavy liquid is discharged through a pipe 6 while a highviscosity, fat and protein-containing light liquid is discharged through the pipeline 7.
Patent GB-1179028-A (GB)
Title: Improvements in or relating to Electric Clocks
Inventor: KRUGER GUSTAV
IPC: G04B11/02
Filed: 1967-03-22
Abstract: 1,179,028. Electric clocks. G. KRUGER. March 22, 1967 [March 23, 1966], No. 13385/67. Heading G3T. A return stop 3 is arranged between the main-spring and the gear train in an electric clock so that the mechanical connection between the main-spring motor and a driving wheel 1 is completely interrupted during winding of the main-spring. The driving wheel 1 is preferably made of metal or synthetic plastics material or it may have a coating of synthetic plastics material. The return stop 3 is pivoted at 9 to a driving lever 2 which is connected to the mainspring that when the main-spring is wound it moves the lever in the direction of an arrow b. To effect winding, a contact on an armature is moved into engagement with a contact 4 on the stop 3 so that the stop rotates in an anti-clockwise direction thereby removing its surface 8 from the driving wheel 1. After winding, a spring 7 returns the surface 8 into driving engagement with the wheel 1. In a modification, the return stop includes a triangular wedge in place of the surface 8.
Patent GB-638129-A (GB)
Title: A new or improved guard for milling machines
IPC: F16P3/08
Filed: 1948-05-18
Abstract: 638,129. Machinery guards. PRESS GUARDS, Ltd., and EVANS, F. A. May 18, 1948, No. 13393. [Class 80 (iv)]. A guard for a horizontal milling machine comprises a frame enclosing the spindle 11 and cutter and consisting of a lower channel 17 extending at least along the front and around both ends of the traversing table 16 on which it is mounted, and a parallel spacedupper channel 18. A flexible shutter 20 consists of linked vertical bars carrying at each end balls engaging the channels 17, 18. Fixed steel plate shutters may permanently close each end of the frame. Two switches 25, connected in series with the driving motor 12, are provided on the upper channel 18 and are closed by trip members extending into the channel. The switches may also control an electro-magnetic brake 26 on the motor. The top of the frame may be closed by a fixed grid, and the back may be closed by a shutter, similar to the shutter 20, sliding in channels and having a gap for the spindle bearing. It is stated that the motor may be controlled by a manual switch coupled to interlocks on the shutter by a mechanical linkage, Bowden cable or fluid pressure line. Similar interlocking means may control a clutch in the spindle drive.