baber/WOPTO huggingface dataset:
Patent GB-931053-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B7/12
Filed: 1960-03-04
Abstract: 931,053. Photographic cameras. ALFRED GAUTHIER G.m.b.H. March 4, 1960 [March 14, 1959], No. 7664/60. Class 98 (1). In a photographic camera including a diaphragm, a photo-electric exposure meter, a scanner capable of scanning the position of a movable member of the exposure meter in dependence upon the actuation of the shutter trigger and a change-over arrangement settable to positions " Auto " and " Hand," a twoarmed lever rotatable about a stationary axis and connected to a member actuating the diaphragm is arranged to selectively connect the diaphragm to the change-over arrangement or to the scanner, the lever being displaceable by means of a control arrangement associated with the change-over arrangement when the latter is in the " Hand " position, and by means of the scanner when the change-over arrangement is in the " Auto " position. Automatic setting of the diaphragm in the camera shown in Fig. 2 is obtained as follows. As a shutter release 5 is depressed against the loading of a spring 7, a compression spring 13 depresses a scanner 6 until one of the steps 6a thereon comes against an exposure meter pointer 15, whereby the diaphragm comprising blades 8 is adjusted to an aperture depending on the measured light conditions by way of a bell crank lever 22, a slide 19, a two-armed lever 17 pivoted at 16 and a spring- urged diaphragm actuating ring 11. For manual setting of the diaphragm, a change-over ring 26 is rotated clockwise from its position in Fig. 2- by means of an external setting ring-so that movement of the slide 19 is prevented by the engagement of a pin 31 thereon with the outer periphery of the ring 26, lever 17 then being controlled by engagement of a pin 320 thereon with a cam 26b. The exposure meter galvanometer may be rotated in known manner to take account of shutter speed, film sensitivity and filter factors. Return of release 5 to its original position is prevented until exposure has been completed by means of a locking device (Fig. 5, not shown) which is automatically engaged on depression of the release 5 and is arranged to be released by a part of the shutter driving mechanism.
Patent GB-566151-A (GB)
Title: Improvements in and relating to building construction
IPC: E04F13/14
Filed: 1943-05-14
Abstract: 566,151. Building units. C.U.R.A. PATENTS, Ltd., and DUNCAN, R. A. May 14, 1943, No. 7722. [Class 87 (i)] A building element for building structures, wherein the units are held together by concrete &c. consists of a flat tile 9 formed along one side and the top edge respectively with a U- shaped trough section 13 and a ledge 12, both extending back from the body of the tile. A number of such tiles may be assembled away from the building site into a unit, as shown in Fig. 5, with the troughs and ledges overlapped by the free edges 15, 17 and concrete may be poured into the closed horizontal ledge 12 and metal reinforcement rods may be laid therein prior to pouring with the ends extending into the closed vertical trough 13. These compound units may be erected into a rigid wall by pouring concrete into the continuous vertical troughs formed at their abutments after inserting vertical metal reinforcing rods therein. A modified corner element has a rearward flange on the other vertical edge and another modification has the trough 13 duplicated on the other vertical edge.
Patent GB-854200-A (GB)
Title: Improvements in or relating to processes for the production of threo-1-p-nitrophenyl-2-amino-1,3-propanediol and acetyl derivatives thereof
Filed: 1959-03-05
Abstract: Threo-1-p-nitrophenyl-2-amino-1 : 3-propanediol or an acetyl derivative thereof is prepared by epimerization of the erythro aminodiol (racemic or optically active) by treating a hydrohalide thereof with an acetyl halide to give the 1 : 3-diacetyl derivative, rearranging this in an alkaline medium to the 1-hydroxy-2-acetylamino-3-acetoxy compound, oxidizing the 1-hydroxy group to a keto group, removing the 3-acetyl group by partial hydrolysis, reducing the resulting 1-p-nitrophenyl-2-acetylamino-3-hydroxypropan -1-one with calcium borohydride, decomposing the resulting complex in an acid medium and separating the threo-1-p-nitrophenyl-2-acetylamino-1 : 3-propanediol by fractional crystallization from the resulting mixture of threo and erythro isomers.  The free threo-aminodiol may then be obtained from its N-acetyl derivative directly by acid hydrolysis, or (with concurrent purification from the last traces of erythro isomer) by a two step process in which the N-acetyl compound is treated with alcoholic hydrogen chloride to produce a precipitate of pure hydrochloride of the threo-2-amino-3-acetoxy compound which is then subjected to acid hydrolysis.  The byproduct erythro-acetylaminodiol may be hydrolysed to the free erythro-aminodiol and the latter again subjected to the epimerization process.  The oxidation step is preferably performed with potassium permanganate, advantageously in an aqueous solution containing acetic and sulphuric acids. Specification 711,135 and German Specifications 876,097, 931,829 and 932,613 are referred to.
Patent GB-1138024-A (GB)
Title: Production of phosphorus
IPC: C01B7/09
Filed: 1966-02-22
Abstract: 1,138,024. Phosphorus; hydrogen halides. PULLMAN CORP. 22 Feb., 1966 [1 July, 1965], No. 7794/66. Heading C1A. Phosphorus and a hydrogen halide are produced by heating a mixture of Al phosphate and a metal halide in the presence of H 2  (which may be formed in situ). The halide may be a chloride, bromide or fluoride of an alkali, alkaline earth, or Gp7 metal. With LiCl, CaCl 2 , or MgCl 2 , HCl is evolved at a lower temperature than P, and the reaction can be carried out in 2 stages. With NaCl, KCl, NaF, CaBr 2 , BaCl 2 , CaF 2 , MgF 2  or MnCl 2 , the hydrogen halide and P are evolved together. The P is condensed and the hydrogen halide absorbed in water or base. The reactants may be ball milled together, or the AlPO 4  may be formed into a paste with a solution of the halide and then dried and pelletted. The AlPO 4  may be naturally occurring. Heating may be effected in H 2 , methane, ethane, propane, butane, ethylene, a natural gas, or in a mixture of H 2  and CO obtained, e.g. in situ, from coke or tars and steam. The various temperatures at which P and hydrogen halide are evolved are given. The temperature should be maintained at 600-1200‹ C. during evolution of P. Reference has been directed by the Comptroller to Specification 1,011,689.
Patent GB-667678-A (GB)
Title: Improvements in and relating to machines for driving staples, nails and the like
Filed: 1949-03-22
Abstract: 667,678. Stapling. WALTER INSTRUMENTS, Ltd., NOAD, J. E. G., and ARMSTRONG, C. J. March 21, 1950 [March 22, 1949], No. 7821/49. Class 89 (iii). A stapling or nailing appliance comprising a base 1 to which is pivoted an arm 5 carrying a magazine 13 and a spring-raised driving plunger 8 is provided with a full-stroke mechanism consisting of a spring-pressed detent 37 which cooperates with notches 32, 33 in a channel member 24 which carries the plunger 8. A second detent 42 is spring-pressed towards the first detent 37 and is provided with a projection 45 which engages over the detent 37 upon completion of a driving stroke to hold the latter disengaged while the plunger 8 is returned by its spring 27. A plate 26 in the channel member 24 co-operates with an arm 44 on the detent 42 to free the detent 37 when the plunger reaches its normal upper position. The magazine 13 is held to the arm 5 by a movable catch 19 and limited movement of the arm and magazine away from the base 1 is permitted by a pin 21 carried by a spring 22 on the magazine co-operating with an aperture 23 in the base 1.
Patent GB-1162862-A (GB)
Title: Cookers
Inventor: WEBBER ANTHONY JOHN
IPC: F24C15/02
Filed: 1967-02-18
Abstract: 1,162,862. Detachable oven doors. PARKINSON COWAN Ltd. 28 Feb., 1968 [18 Feb., 1967], No. 7834/67. Heading F4W. [Also in Division E2] An oven or other hinged cooker door 1 is detachably mounted on two spaced-apart links 5, hinged at one end on hinge pins 2 to hangers 3 mounted on the fixed door frame 4, each link having spaced from said end a notch 13 which releasably engages a pin 12 on the door, together with a further releasable engagement between the link ends. This further engagement comprises a pin 14 on the door which engages a notch 15 in a member 9 pivoted to (11) and movable with respect to the link 5 between a locked and released position, this member 9 being manually movable and being provided with an extended portion 10 shaped so that, when the member is moved to the released position it forms a stay that engages the door frame or an associated part of the cooker and holds the link in a partially open position to facilitate removal of the door (see Fig. 2, not shown). The pin 14 also co-operates with a notch 16 in the link 5 so that when the movable member 9 is in its normal position with the flange flush against the edge of the link 5 the pin 14 is trapped in a space defined by the notches 15 and 16. The door is detached from its link mountings by partially opening it and moving the members 9 to their released position in which they abut the front of the frame 4, thus freeing the pins 14 from the notches 15, the door then being swung about the axis of the pins 12 to move the pins 14 out of the notches 16. The door is finally removed by lifting it against gravity so as to disengage the pins 12 from the notches 13.
Patent GB-526285-A (GB)
Title: Improvements in or relating to muffling devices
IPC: B25D17/12
Filed: 1939-03-11
Abstract: 526,285. Exhaust-silencers. MOSS, E. W. (Ingersoll-Rand Co.) March 11, 1939, No. 7941. [Class 7 (ii)] In means for muffling the exhaust gases of percussive drills, a casing 20 surrounds the working cylinder 22 and is divided into compartmentt by partitions 39, 40. Exhaust gas from a port 28 escapes into a compartment 35 and by channels or passages 46 into a compartment 43, and from thence by passages 47 in a compartment 44 to the outlet ports 45. A flexible sheet 48, which may be of rubber, confronts the exhaust port and is agitated there by to prevent the formation of ice.
Patent GB-808942-A (GB)
Title: Improved open refrigerator display case
IPC: A47F3/04
Filed: 1957-03-12
Abstract: 808,942. Refrigerators. GENERAL MOTORS CORPORATION. March 12, 1957 [March 13, 1956], No. 8086/57. Class 29 A refrigerated display case comprises upper and lower storage compartments 16, 17 having access openings across which air is circulated by a far 43 in parallel streams of differing velocities. The air is first passed over evaporators 37 located in a passageway 18 extending over the sides and back of the compartments 16, 17 and re-enters the fan through a passageway 19 formed by the adjacent walls of the compartments. The horizontal walls bounding the access openings have slots 21, 22 and as shown the horizontal walls of passageway 18 have each a curved bale 23 dividing the air into inner, faster, and outer, slower, streams. The food storage shelves are. plate evaporators.
Patent GB-666272-A (GB)
Title: Improvements in or relating to automatic control systems for aircraft
Inventor: MEREDITH FREDERICK WILLIAM
Filed: 1949-03-25
Abstract: 666,272. Automatic aircraft control systems. SMITH & SONS (ENGLAND), Ltd. March 23, 1950 [March 25, 1949], No. 8216/49. Drawings to Specification. Class 38 (iv). In an automatic control system such as that described in Specification 611,037, in which the aircraft is controlled in accordance with the deviation plus rate of turn from its datum attitude, the D.C. rate of turn signal is modified to attenuate its higher-frequency Fourier components by applying it to a series R.C. network and using the signal voltage across the capacitor.
Patent GB-115719-A (GB)
Title: Improvements in Electric Furnaces.
Inventor: SAHLIN OLOF
IPC: H05B3/64
Filed: 1917-06-13
Abstract: 115,719. Sahlin, O. June 13, 1917. Electrode furnaces.-In a furnace such that arcs can be formed either on or independently of the charge, all the electrodes enter through the side walls in pairs in vertical planes, each upper electrode A<1> being inclined downwards, and each lower electrode B<1> substantially horizontal The electrodes are preferably remote from a charging and discharge door G. One pair may be provided for each of two or three phases of the current, or direct current may be employed. Connexion between the lower electrodes and the charge is made through a plate J in the hearth F, having a resistive lining of carbon or other material. The electric pressure of an arc between the charge and the upper electrodes is normally about a half of the. pressure between two inclined electrodes. Before the furnace is charged, arcs are formed between the electrodes in the position shown. The upper electrodes may be pushed forwards to lower the arcs. When the charge of scrap metal has been partly melted, the furnace may be tilted so that the slag nearly reaches the lower electrodes, which are drawn back to allow direct arcing between the charge and upper electrodes. If a thick layer of slag is required for refining the metal, one pair of electrodes may form an independent arc, while another pair arcs on to the charge, until this is melted down. A water-cooled holder K for each pair of electrodes, the upper of which is insulated, is attached by a cotter M to a bracket L on the furnace wall. A domed roof D is slightly inclined as shown, so that heat rays strike it at varying angles and concentration of heat thereon is avoided. It is revoluble to prevent unequal wear, and may be raised to allow the furnace to be charged. According to the Provisional Specification, the hearth resistance is of coke or charcoal breeze, or electrode fragments,
Patent GB-741678-A (GB)
Title: Improvements in or relating to a method of heat treating the contents of closed containers
IPC: A23L3/10
Filed: 1953-03-27
Abstract: 741,678. Sterilizing the contents of bottles &c. NISSEN, H. March 27, 1953 [March 29, 1952], No. 8493/53. Classes 49 and 81(1). In heat treating the contents of closed bottles or other containers in autoclaves by supplying steam under pressure to heat the bottles &c. to a desired temperature, maintaining the pressure and temperature for a period sufficient to accomplish the heat treatment and finally cooling the bottles &c. by exhausting the steam at a sufficiently slow rate to avoid breakage of or other damage to the bottles &c., the bottles stand in an open liquid bath, in order to enable, by evaporation of the liquid therefrom, the cooling period to be reduced. Further cooling by evaporation from the liquid bath after the exhausting of steam may be effected by causing pressure in the autoclave to drop below the pressure of the atmosphere by condensation of the remaining steam either by internal or external cooling of the autoclave or by connecting it to a jet or surface condenser. After attainment of atmospheric pressure within the autoclave, it may be connected with a pump for the production of a vacuum therein. As shewn, a bottle 7 whose contents are to be sterilized is placed in a bath 6 of distilled water in an autoclave 1, a test bottle 7 connected to a thermometer 8 being also provided, steam at 1“ atmospheres pressure is admitted through a valve 3, and, when the internal temperature of the bottles reaches 120‹C., the autoclave is left under a pressure of about 1 atmosphere for 20 minutes ; then the steam is exhausted via a valve 4 so that the water in the water bath evaporates evenly and quietly and the temperature drops in 15 min. to 100‹C., the temperature and pressure dropping at almost the same rate in the autoclave proper as in the bottles. Cooling is then continued by condensation of the steam by cooling of the autoclave and, if required, by a suction through the valve 4. The contents of the bottles are cooled to 65‹C. in “ to ¥ hour with high vacuum. Two or more water containers may be mounted above each other when a larger autoclave is used.
Patent GB-739965-A (GB)
Title: Method of dehydrating gas or like tar
IPC: C10C1/06
Filed: 1954-03-23
Abstract: 739,965. Tar. KOPPERS GES., H. March 23, 1954 [June 8, 1953], No. 8501/54. Class 55 (2). Tar to be dehydrated is passed through a collector 1 at a temperature of 70‹ C. the dwell period being about 24 hours. Ammoniacal liquor almost completely free of tar is drawn off through an outlet 1c and the tar with a water content of about 25-30 per cent is pumped under pressure of about 35-40 lbs. per square inch through a heater (not shown) to raise its temperature to about 85-90‹ C. into a pressure separator 3. A tar layer with a water content of less than 5 per cent is drawn off at 3a, and upper layer of water or liquor is drawn off at 3b and the intermediate layer of emulsion is returned by a line 4 to below the surface of the tar layer in the collector. The emulsion is entirely broken down in the hot tar.
Patent GB-630071-A (GB)
Title: Improvements in or relating to the laying of roadway, airdrome and like foundation coverings
IPC: E01C3/00
Filed: 1947-03-28
Abstract: 630,071. Road foundations; floors. SOLIDITIT FRANCAIS. March 28, 1947, No. 8517. Convention date, Nov. 4, 1946. [Classes 20(iv) and 107] To construct load-bearing surfaces such as roads and floors on unstable soil S<SP>1</SP>, the soil is removed to a certain depth and a shield C, practically impervious and capable of withstanding variations in the loading conditions, is laid ; the suitably prepared excavated soil or other suitable material S being placed on the shield C and covered in turn by an impervious covering R of tarmacadam or concrete. Vertical-walls P may be provided at intervals, the walls extending upwards through the shield C and the covering R.
Patent GB-492532-A (GB)
Title: Improvements in or relating to centrifugal clutches
IPC: F16D43/12
Filed: 1937-03-23
Abstract: 492,532. Friction clutches. WHATMOUGH, W. A. March 23, 1937, Nos. 8564/37 and 455/38. [Class 80 (ii)] The presser plate 8, Fig. 1, of a plate clutch is moved resiliently to engaged position, against the action of adjustable springs 15, by balls or rollers 9 which are arranged in groups in compartments 3a formed in the coverplate 3 and which move centrifugally outwards between radial grooves 10 in the plate 8 and inclined leaf-springs 17<1> secured in the cover 3. In the form shown in Fig. 3, each ball 9 moves between the plate 8 and the inclined double arm 17 of a mouse-trap spring 17a held in the cover 3, and the plate 8 is normally retracted by levers 4 loaded by springs 6 and engaging studs 7 secured to the plate 8. The levers 4 are operable by a collar 5 so as to obtain voluntary disengagement of the clutch. The bends of the arms 17 may contact with the rear wall of the compartment 3a after a predetermined deflection of the arms, so that thereafter the rating of the springs is increased. Alternatively, a leaf spring 18, Fig. 5, secured to the cover 3 has its free end bent back upon itself to provide an auxiliary spring 18a against which the ball 9 bears. Each ball is guided between a pair of lugs 19 formed on a thin plate 20 secured to the plate 8 or to the cover 3. In another form, the leaf spring is of laminated form, comprising an inner leaf inclined at a greater angle than an outer stronger leaf so that the latter only functions after a predetermined deflection of the former. In the form shown in Fig. 7, each ball is arranged between a single leaf spring 23 and a lever 24, which latter is pivoted at its inner end on the cover 3 and has an intermediate projection 24a bearing on the plate 8, whereby the ratio between the centrifugal force and the axial thrust applied to the plate 8 increases as the balls move outwardly. In the form shown in Fig. 8, a leaf spring 25 secured to the cover 3 is interposed between each ball and the plate 8, the outer end of the spring converging towards the rear wall of the compartment 3a. In the fully-engaged position, the balls normally occupy the position shown in dotted lines, but, as the clutch linings wear, they move along reversely-inclined surfaces 26 of the compartments. According to the first Provisional Specification, the centrifugal balls or rollers may act directly between the presser plate and an inclined face of the cover-plate.
Patent GB-826333-A (GB)
Title: Pipe joint
IPC: F16L27/10
Filed: 1958-03-18
Abstract: 826,333. Joint-making packing. AMERICAN CAST IRON PIPE CO. March 18, 1958 [July 5, 1957], No. 8622/58. Class 122 (3). [Also in Groups XXVIII and XXXVI] A compressible gasket, for use in a spigot and socket joint, comprises an annular body having a front end wall 25 perpendicular to the axis of the gasket and a rear end wall 26 slightly concave in form, an inner side wall for reception of the spigot comprising a sloped portion 27 extending rearwardly in an axially convergent direction and an axially extending portion 28, and an outer side wall including a first axially divergent portion 29, a radial shoulder-forming portion 30, a second axially divergent portion 31 and an axially extending portion 32. The inclination of the portion 29 to the axis of the gasket is greater than that of portion 31. The gasket is made of rubber of two different degrees of hardness, the part 13a being more resistant to compression and abrasion than the part 13b. Alternatively, the gasket is made of rubber of uniform hardness the front end thereof being provided with an external fabric reinforcement such as duck.
Patent GB-1505032-A (GB)
Title: Production of phenolic resins
IPC: H01B7/29
Filed: 1976-03-04
Abstract: 1505032 Laminates SOC ITALIANA RESINE SIR SpA 4 March 1976 [7 March 1975] 8641/76 Heading B5N [Also in Division C3] Flame-resistant paper laminates are prepared by impregnating paper substrates, e.g. kraft paper, alpha-cellulose paper, rag paper, sulphite paper, crepe paper or Mitscherlich paper, with a modified phenolic resin to obtain a residue of 30% wt. of resin on the paper, followed by drying; then superimposing the impregnated substrates and heat pressing. The modified phenolic resin is one that has been prepared by a process in which formaldehyde and a phenol or a mixture of phenol with another phenol are reacted in a first stage in a molar ratio of 1À2 : 1 to 2À5 : 1, in the presence of an inorganic base, at a pH of greater than 7 and up to 10, at 50-100 C. for 20 minutes to 5 hours and at least until the quantity of free HCHO remaining is reduced to 1-7 % wt. and a phenolic resole resin is produced, and reacting the resulting product in a second stage with 1 to 10% wt. of the reaction medium of at least one amino compound, e.g. urea, melamine or dicyandiamide, in the presence of a basic catalyst, at a pH of greater than 7 and up to 10, at a temperature of 20 to 100 C. for 5 minutes to 3 hours, and at least until a modified phenolic resole resin has been made with a free phenol content and free HCHO content of up to 3% and 2% respectively by weight of the reaction medium; and diluting the resulting product with methanol to a solids content of 40-60% wt. The phenol or said other phenol is preferably monohydric, e.g. phenol, cresol or xylenol. Conventional flame retardants, e.g. a halogenated alkyl polyphosphate may be added.
Patent GB-1429281-A (GB)
Title: Underwater blasting method and devices used therewith
IPC: F42D1/00
Filed: 1974-02-26
Abstract: 1429281 Explosive compositions AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY 26 Feb 1974 [27 Feb 1973 9 May 1973 10 May 1973] 8660/74 Heading C1D [Also in Divisions E1, F3 and G1] A fluid explosive for use in underwater blasting (see Division El) may be a composition containing urea perchlorate as described and claimed in Specification 1,429,282; an additional composition comprises urea perchlorate, nitromethane and trinitroethyl orthoformate. Other fluid explosives referred to are compositions containing hydrazine nitrate or perchlorate together with water and monoethanolamine, ethylene diamine, monomethylamine, hydroxyethyl hydrazine, hydrazine, or sodium nitrate; or a mixture of ammonium nitrate, hexagen, and water or of nitric acid and fuel oil.