baber/WOPTO huggingface dataset:
Patent GB-878693-A (GB)
Title: Synthesis of í~-pregnadiene-17 ª-, 21-diol-3, 20-dione
Inventor: CAMERINO BRUNO
IPC: C07J75/00
Filed: 1958-03-21
Abstract: The invention comprises 16b -bromo-D 1,4-pregnadiene-17a ,21-diol-3,20-dione 21-acetate, and a process for the preparation of D 1,4-pregnadiene-17a ,21-diol-3,20-dione by epoxidising D 5,16-pregnadiene-1b ,3b -diol-20-one, e.g. with hydrogen peroxide and alkali, to form 16a ,17a -epoxy-D 5- pregnene-1b ,3b -diol-20-one, diacetylating this compound, e.g. with acetic anhydride and pyridine, to form the corresponding 1b ,3b -diacetate, treating the diacetate with bromine and hydrobromic acid to form 5,6b ,16b ,21-tetrabromo-pregnane-1b , 3b ,17a -triol-20-one 1,3-diacetate, selectively hydrolysing this compound at position 3, e.g. by dissolving the 1,3-diacetate in benzene and adding hydrobromic acid in methanol, to form 5,6b ,16b ,21-tetrabromo-pregnane-1b , 3b ,17a -triol-20-one 1-acetate, reacting this 1-acetate with sodium iodide and potassium acetate to form 16a ,17a -epoxy-D 5-pregnene-1b ,3b ,21-triol-20-one 1,21-diacetate, oxidising said 1-21-diacetate, e.g. with sulphuric and chromic acids for 20 minutes at a temperature of from 0 to -10 DEG C., to form 16a ,17a -epoxy-D 5-pregnene-1b ,21-diol- 3,20- dion 1,21- diacetate, reacting this 1,21- diacetate with hydrobromic acid to form 16b -bromo-D 1,4-pregnadiene-17a ,21-diol-3,20-dione 21-acetate, reducing the said 21-acetate with Raney nickel (pretreated with acetone), boiling ethanol in the presence of acetic acid, particularly a minute quantity of acetic acid, to form D 1,4-pregnadiene-17a ,21-diol-3,20-dione-21-acetate, and hydrolysing the last mentioned 21-acetate.  The above process may be modified in that for the first step of the above process crude D 5,16-pregnadiene-1b ,3b -diol-20-one is obtained from the degradation of ruscogenins.  The 16a ,17a -epoxy-D 5-pregnene-1b ,3b -diol-20-one 1,3-diacetate may be brominated by dissolving the said 1,3-diacetate in a carbon tetrachloride/acetic acid mixture and adding to the solution at a temperature of from 15 DEG  to 30 DEG C. first bromine in carbon tetrachloride, then hydrobromic acid in acetic acid and finally further bromine in carbon tetrachloride.  The 5,6b ,16b ,21-tetrabromo-pregnane-1b ,3b ,17a -triol-20-one 1-acetate is preferably treated in benzene solution at room temperature with an absolute ethanol solution of sodium iodide and then the reaction product is heated with potassium acetate in acetone at the boiling point to form the 16a ,17a -epoxy-D 5-pregnene-1b ,3b , 21-triol-20-one 1,21-diacetate.  Detailed examples are given. Specification 878,694 is referred to.
Patent GB-288276-A (GB)
Title: Improvements in sound producing and reproducing instruments
IPC: H04R1/02
Filed: 1928-03-26
Abstract: 288,276. Victor Talking Machine Co., (Assignees of Haigis, C. D.). April 6, 1927, [Convention date]. Loud-speakers; magnetic instruments; diaphragms. - An electromagnetically or mechanically operated sound producing or reproducing diaphragm is of conical or frusto-conical formation and has means located within the cavity of the diaphragm to cause the sound waves to travel in a direction substantially parallel to the surface of the diaphragm whereby interference due to radiation from different parts of the diaphragm is avoided. Fig. 1 shows a moving coil loud-speaker having a conical diaphragm 8, the periphery of which is attached to a ring U clamped between the flange 10 of a supporting-ring 7 and a ring 11. One or more gaskets 12 may be interposed between the flange 10 and the ring 9. The diaphragm is mounted opposite an aperture 16 in a partition 17 with a ring 18 interposed between the partition and the ring 11. The means for eliminating interference comprises a conical member 20 mounted within the cavity of the diaphragm upon brackets 21. The outer surface of the member 20 is parallel to the surface of the diaphragm and is arranged at such a distance from the diaphragm that no damping takes place. The member 20 may be hollow or solid and in the former case the inner surface may be parallel or tapered with respect to the outer wall. The inner end of the diaphragm carries the armature, moving coil or other means for driving the diaphragm and has a spider 13 attached by a screw 14 to the core 4 of the electromagnetic unit 1.
Patent GB-866251-A (GB)
Title: Package assembly
IPC: B65D75/38
Filed: 1958-03-21
Abstract: 866,251. Sterile packages. STONEHILL, A.A., and ZOLLER, H. F. March 21, 1958 [March 22, 1957], No. 9200/58. Class 94(1). A sterilised package is constructed so that the opening through which the contents are withdrawn is covered by a portion removable prior to such withdrawal. The contents are thus not contaminated during passage out of the opening. In one embodiment an outer envelope 11 for sutures is closed by adjesive tape, removal of which leaves a sterile area adjacent the mouth. The sutures are contained in individual packages 24 in a common sheath 18 for ease of handling. Other embodiments are described in which a simple flat envolope, which may have a closure flap, is sealed by tape, Figs. 4-8 (not shown). In a further suture package, the sutures and sheath 57 are enclosed in two telescoped open-ended envelopes 51, 56 which may be sealed by tape 54, as shown, or may be joined directly with a weakened seam &c. being provided adjacent the join in the envelope 56. The invention may be applied to rigid packages including those comprising metal containers. Specification 638,257 is referred to.
Patent GB-704887-A (GB)
Title: Apparatus for the drive of oscillatory systems
IPC: B24B33/02
Filed: 1951-04-19
Abstract: 704,887. Grinding ; percussive tools. WIECK, K., and HEIM, S., [trading as SCHWINGCHEIFTECHNIK WIECK & HEIM-KOMMANDIT-GES.]. April 19, 1951 [April 20, 1950; Nov. 24, 1950], No. 9222/51. Classes 60 and 124 [Also in Group XXIV] A honing tool 3, Fig. 8, is adapted to be oscillated at a high frequency by means of a spring-mass system driven by compressed air. A piston 8 forming an exciter mass is controlled by springs 9 within a,cylinder 6 forming a second mass and having ports for the supply of compressed air. The cylinder 6 is in turn supported by springs 7 within a, member 4 comprising the main oscillating mass of the system and carrying the tool 3 and is supported in a fixed guide 2 for restrained movement by springs 13. Initial displacement of the piston 8, such as by the operation of an auxiliary starting valve, supplies air to one end of the piston to start the system oscillating, which oscillations effect the subsequent control of the air ports in the cylinder 6. The resistance offered to the movement of the tool 3 effects a phase displacement of the piston with respect, to the cylinder which results in a greater opening of the air ports to compensate for increasing resistance. A similar spring-mass system operated by compressed air is shown in Fig. 9 applied to a stamping tool having two operating surfaces 4b, 20 on masses 4a, 6a connected by springs 7<SP>1</SP>, 7<SP>11</SP>, 7a and having a spring-controlled exciter piston 8a within a cylinder 6<SP>1</SP> attached to the mass 6a. A holding member 15 with a handle 16 is secured to a ring member 14a between the springs 7<SP>1</SP>, 7<SP>11</SP>. A control valve 17 is arranged on the handle 16 to regulate the flow of compressed air from a supply line 18.
Patent GB-1055991-A (GB)
Title: Compressed air or other gas control valves
Inventor: GUY KENNETH THEODORE
IPC: F16K31/40
Filed: 1963-03-08
Abstract: 1,055,991. Valves. ROTAX Ltd. Feb. 17, 1964 [March 8, 1963]. No. 9232/63. Heading F2V. A valve has a hollow element 13 supported by legs 14, which element houses a bell-mouthed piston 18 connected to a first closure-member 19 slidable on the element 13 and co-operating with a seat 20 in the inlet 11; a second closuremember 21 slidable in the element 13 is spring- loaded and coacts with a seat 23 in the outlet. A chamber 24 is defined between the piston 18 and member 21 to and from which fluid upstream of the inlet 11 is admitted and exhausted by a solenoid-operated valve 26. The interior annular surface of the member 19 is subjected to inlet pressure via a hole 28 so that when the chamber 24 is exhausted the member 19 will occupy the position shown due to the inlet fluid acting on its external surface. Upon pressurizing chamber 24 the member 19 abuts the seat 20; air is vented from an annular chamber 29 behind the piston 18 when the latter moves. The second closure-member 21 has an annular area 32 which, when member 21 is closed and member 19 open, is subjected to inlet pressure so that upon exhausting chamber 24 the member is seated. Member 21 closes upon pressurizing chamber 24 due to a small pressure-drop across member 21 and because spring 22 does not exert any thrust when the latter is closed.
Patent GB-369008-A (GB)
Title: Improved apparatus for preparing feed for livestock
IPC: A23N17/02
Filed: 1931-03-27
Abstract: Oats, maize, kaffir corn, feterita, alfalfa, soya beans, hay, cotton seed meal, bran or other grain is mixed with molasses or other sweetened liquid in such a way as not to affect the B- and C-vitamine content of the molasses or other liquid.
Patent GB-461783-A (GB)
Title: Improvements in or relating to electric multi-way plug-adapters
IPC: H01R31/02
Filed: 1936-03-30
Abstract: 461,783. Plug couplings. LUNDBERG & SONS, Ltd., A. P., and PEGG, G. March 30, 1936, No. 9443. [Class 38 (i)] In an adaptor for 3-wire circuits with " live," " neutral " and " earth " connections, comprising a lateral plug connection 12, 15 to the supply and oppositely-directed socket groups 2, 3, 4 at the ends, corresponding " live " and " neutral " sockets are connected by bridges 10 which cross one another at an angle so that the order of the sockets when viewed from the direction of entry is the same at both ends. As shown, pillars 9 to which the " live " and " neutral " sockets are attached are inserted in bores in the body portion, the bridges lying in a recess which is closed by a disc 16. The earthing sockets are formed by a member 5 passing right through the body, the earth pin 15, which by means of a shoulder holds the disc 16 in position, being secured to the member 5 through an intermediate transverse member 13. Further sockets at the top of the body may be formed on the ends of the pillars 9, a further earthing socket being fixed to the end of the pin 15. The bridges may be separated by bowing as shown or may be insulated, and may contain fuses. In a modification, the bridges and the connections to the sockets are formed integrally from U-shaped strips.
Patent GB-1038123-A (GB)
Title: Glazing bars
Inventor: THOMAS BASIL ARNOLD
IPC: E04D3/08
Filed: 1962-03-12
Abstract: 1,038,123. Glazing bars. BAST GLAZING CLIPS Ltd. May 17, 1963 [March 12, 1962], No. 9463/62. Heading E1R. A glazing bar for panes of glass 8 (e.g. in a greenhouse) held by clips 15 comprises a web 2 integral with opposed members retaining the clips 15 and with flanges 3 having slotted box .seatings 4 for sealing-members 9 on which the glass 8 rests. Locating members 7 are integral with the flanges 3. Each sealing member 9, which may be of plasticised P.V.C., comprises a salient tubular portion integral with a T-section mounting portion. Grooves 12 in the members 1 locate the end of the clip 15 during assembly. A tongue 18, Fig. 4 (not shown), is stamped out of each glazing clip to provide a stop for the lower edges of overlapping panes of glass. An undercut recess 33 in the glazing bar receives the heads of bolts by which the bar is mounted.. The glazing bar may be extended and is preferably of corrosion-resistant metal or alloy such as aluminium. The clip 15 may be of stainless steel.
Patent GB-498501-A (GB)
Title: Improvements in liquid burners
IPC: F23D11/04
Filed: 1937-04-03
Abstract: 498,501. Liquid-fuel burners. PIETRI, F. April 3, 1937, No. 9499. Void. Convention date, April 3, 1936. [Class 75 (i)] Liquid fuel supplied through a nozzle 5 issues through radial orifices 8 in a jet 7 on to a head 9 rotated rapidly by propeller blades 10 in the path of air supplied through a pipe 1b to a nozzle 1. Part of the air escapes through a nozzle aperture 1a around the head 9 and carries the atomized mixture into the furnace and the remainder escapes to the combustion chamber through ports 14 regulated by an adjustable ring 13.
Patent GB-1302618-A (GB)
IPC: C08G85/00
Filed: 1970-02-27
Abstract: 1302618 Purification of polycarbonate solutions FARBENFABRIKEN BAYER AG 27 Feb 1970 [5 March 1969] 9516/70 Heading C3R Polycarbonate solutions are purified by washing the solutions with a wash liquid immiscible with the polycarbonate solution in a pulse column having perforated plates, the proportion by volume of polycarbonate solution in the extraction column to the wash liquid being not greater than 0À1 and the wash liquid forming the continuous phase. Suitable wash liquids are dilute alkali or acid or water.
Patent GB-1487316-A (GB)
Title: High pressure pumping systems with metering
IPC: F04B13/00
Filed: 1976-03-10
Abstract: 1487316 Reciprocating pumps HEWLETTPACKARD CO 10 March 1976 [2 April 1975] 09577/76 Heading F1A Pumping apparatus for supplying liquid at a controlled rate at high pressure, e.g. for liquid chromatography, comprises a high-pressure pump 51 supplied by a pump 26, pump 51 always presenting a low pressure at its inlet on its intake stroke so that the output flow-rate of pump 26 is constant irrespective of the pressure head against which pump 51 operates. In the embodiment shown, a variable-speed motor 11 drive pitman arms 15, 17 coupled to pump piston 48, via spring 33 and rod 35 and to pump piston 21. The rating of spring 33 is such that piston 48 can deliver against any required pressure head. A spring 41 acts between abutment 39 and piston 48 to bias piston member 47 towards stop 45, the rating of spring 41 being such that a low pressure is presented in pumping chamber 49 when rod 35 is retracted during its intake stroke, the delivery from pump 26 moving piston 48 against spring 41. Arms 15, 17 may be replaced by cams. In another embodiment, Fig. 3 (not shown), both pumps are driven via springs, the low-pressure pump delivery being adjustable by a stop (91) which is moved by a stepping motor (93) to limit the suction stroke of its piston (81), and the high-pressure pump comprising a diaphragm (133), actuated by a piston (119), via a liquid column (127, 129), the stiffeners of the diaphragm, and/or a check valve (124) between a make-up liquid reservoir and the liquid column, preventing suction in the high-pressure pumping chamber during the high-pressure pump intake stroke. A plurality of low-pressure pumps may supply a common high-pressure pump.
Patent GB-399832-A (GB)
Title: Improvements relating to systems for controlling electric motors
IPC: B60L15/04
Filed: 1932-04-04
Abstract: 399,832. Control of D.C. motors. GRAY; W. T., Darroch, Wainwright Road, Altrincham, Cheshire, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House Aldwych, London. April 4, 1932, No. 9632. [Class 38 (iii).] Compound-wound motors A1, A2 are changed from series to parallel connection by opening switches R1 and TRS, and closing switches P and G, thereby connecting the motors in parallel and shunting them directly by a resistance TR. The switch S is then opened, and the unshunted motors remain connected in parallel. The connections are made and broken in the reverse order when the change from parallel to series is effected.
Patent GB-637148-A (GB)
Title: Photographic developer containing an aralkylamine and process of development
IPC: G03C5/305
Filed: 1948-04-06
Abstract: 637,148. Photographic developers. GENERAL ANILINE & FILM CORPORATION. April 6, 1948, No. 9657. Convention date, Aug. 26, 1947. [Class 98 (ii)] An alkaline photographic developer contains a developing agent and an aralkylamine of one of the formulµ wherein R is a methyl or ethyl group and n is 2 or 3. Aralkylamines specified are α- and #- phenylethylamine, and α and y-phenylpropylamine. The aralkylamine increases the rate of development, and may be added to a black-and-white or colour developer. Examples are given of (1) a metol-hydroquinone black- and-white developer including #-phenylethylamine ; (2) a colour developer including sodium hexametaphosphate, N : N - bis - (# . hydroxyethyl) - p - - phenylenediamine sulphate, hydroxylamine hydrochloride, and #-phenylethylamine ; (3) a colour developer including sodium hexametaphosphate, N - ethyl : N - #- hydroxyethyl - p - - phenylenediamine sulphate, hydroxylamine hydrochloride, and α-phenylpropylamine ; and (4) as (3) using α-phenylethylamine. Specifications 458,400, 465,823, 479,838, 483,000, 484,698, 489,093, 489,161, 489,274, and 491,958 are referred to.
Patent GB-917327-A (GB)
Title: Improvements in or relating to synthetic rubber latices
IPC: C08C1/14
Filed: 1961-03-16
Abstract: An ash-free synthetic rubber is obtained from an emulsion of a synthetic rubber latex prepared by the emulsion polymerization of a conjugated diolefin with or without a comonomer, the polymerization being conducted in the presence of a rosin and soap and/or a fatty acid soap, by introducing into one end of an elongated confined zone an emulsion of unpigmented synthetic rubber latex, carbon black-latex master-batch or oil extended carbon black-latex master-batch, the emulsion containing the emulsifier, separately introducing into the same end of the confined zone an aqueous solution of a coagulating acid, flowing the mixture towards the opposite end of the confined zone while mechanically agitating; concurrently mechanically comminuting the intensities of agitation and comminuting being controlled so as to expose all the latex to the acid so giving a coagulum of uniform predetermined particle size and low fines content; keeping the pH at 2,5-3,0 and the temperature at 140 DEG -165 DEG F. (for unpigmented latex) or 95 DEG -125 DEG F. (for master-batches) discharging the coagulum mixture and recovering the synthetic rubber.  The latex may be an emulsion of a styrene-butadiene polymer, the acid may be introduced as a plurality of increments at separate points, the master-batch prepared by bringing together an aqueous carbon black slurry containing a dispersing agent and the styrene-butadiene polymer and flowing them through a homogenizing zone before passing to the elongated confined zone.  The carbon black-latex master-batch may contain an extender oil.
Patent GB-434218-A (GB)
Title: Improvements in and relating to clutches
IPC: F16D41/08
Filed: 1934-03-28
Abstract: 434,218. Ratchet clutches. PAILIN, Ltd., F., and PAILIN, G., Buckley Street, Higher Openshaw, Manchester. March 28, 1934, No. 9668. [Class 80 (ii)] Wedging members e, pivoting about the bases of the gaps in a star-shaped driven member c and adapted to wedge against the inner surface of a driving-drum a during forward drive, have cylindrical bosses e<1> engaging radial slots in a loose plate f, the periphery of which is in contact with a friction ring j secured in the drum, so that the wedges tend to occupy their wedging position shown in Fig. 2. An arm h projecting from the hub of the plate f normally engages a spring- loaded abutment k, forming the armature of an electro-magnet n, whereby the wedges are rocked into inoperative position. On energizing the magnet, the arm h is released and the wedges move to operative position. The arrangement may be such that the arm h itself breaks the circuit of the magnet on being released. There may be more than one arm or more than one abutment.
Patent GB-454268-A (GB)
Title: Improvements in or relating to rotary furnaces, kilns, dryers and the like
IPC: C10B1/10
Filed: 1935-03-28
Abstract: 454,268. Screw - conveyers. LLOYD, F., 26, Alma Street, Sheffield, and LINDARS, H., 54, Victoria Street, Westminster. March 28, 1935, Nos. 9736/35 and 3685/36. [Class 78 (i)] [See also Group XII] The charge is advanced through a rotary retort 11 for the heat treatment of materials by blades 32 set at an angle to, and all on one side of, an independently rotatable shaft 30. When held in the position shown the blades are inoperative, but when the shaft is rotated they cut up the material and move it along the retort. The blades may be semielliptical in form, or smaller, and they are set to overlap one another.
Patent GB-414823-A (GB)
Title: Improvements relating to spare wheel carriers for motor vehicles
IPC: B62D43/02
Filed: 1933-03-31
Abstract: 414,823. Spare - wheel holders. VAUXHALL MOTORS,- Ltd., and DREW, H., Kimpton Road, Luton. March 31, 1933, No. 9757. [Class 136 (i).] In a spare-wheel holder of the type in which the spare wheel rests in a well or cradle on the vehicle and is held at its upper part by a " palm " adapted to be adjusted along a rod c so as to grip the tyre a or to be released therefrom, a lever is pivoted on the palm and is provided with a cam, which in one position of the lever clamps the palm to the rod, and in another position allows relative movement of the palm longitudinally of the rod. The palm consists of two members e, f joined together at their inner edges and apertured to fit over the rod c, the member f being hollow and having flattened edges to engage the tyre a. The edge of the aperture g in the member e is adapted to engage one of a series of grooves d in the rod c, and to be held firmly therein by a lever i, which is pivoted on a pin j and is provided with a cam l adapted to press against the rod c when just beyond dead-centre position, with a projection p on the lever abutting against the member f, the action of the compressed tyre on the palm serving to hold the parts in this position. The lever i is secured in the operative position by the sliding bolt n of a key-controlled lock m. The pivot pin j is secured in a recess in the lever i by one or more pegs k passing through the member f.
Patent GB-1422499-A (GB)
Title: Apparatus for feeding sheets of material individually from a  stack
IPC: B65H3/06
Filed: 1974-03-05
Abstract: 1422499 Feeding sheets W L TOTTLE 5 March 1974 9874/74 Heading B8R Sheets are separated from the top of a pile 3 by a pair of friction rollers 1 on a shaft 2, and there is provided at each side of the pile a finger 4 inclined at 45 degrees and engaging the front of the pile, so that the top sheet buckles so that its front corners press down on the sheet below and prevents double feed, and then flips over the fingers.  (For Figure see next column.)
Patent GB-472881-A (GB)
Title: Improvements in and relating to trees for riding and like boots
IPC: A43D3/04
Filed: 1937-04-07
Abstract: 472,881. Trees and stretchers for boots. HOLT, F. J. W. April 7, 1937, No. 9893. [Class 17 (iii)] A pneumatic tree for leg boots such as riding and top-boots has a plate at the upper end with hooks i on which the pulling-on tabs f of the boot are engaged to prevent ejection of the tree from the boot on inflating it. The plate may be in two parts b<2>, b<3> hinged diametrically at h, through one of which the inflating valve c passes. Local expansion of the tree at the ankle may be prevented by closed bands of inextensible material which pass through the walls at that locality. The foot portion of the tree is at a greater angle to the leg than is the foot portion of the boot and is of greater thickness to facilitate its introduction.