baber/WOPTO huggingface dataset:
Patent GB-1447993-A (GB)
Title: Low flow safety valve apparatus
IPC: E21B34/08
Filed: 1973-10-29
Abstract: 1447993 Valves SCHLUMBERGER TECHNOLOGY CORP 29 Oct 1973 [31 Oct 1972] 50172/73 Heading F2V [Also in Division E1] A downhole low flow well safety valve includes a throughflow mandrel 86 carrying a closure head 116 co-operable with a fixed seat 124, the mandrel being maintained in an upper flow-permitting position while the pressuredrop across a choke beam 138 is sufficient to overcome the bias of spring 98. When the flow rate falls to a predetermined value, e.g. upon closure of a separate safety valve in response to excess flow, the spring depresses the mandrel and the closure head engages a PTFE seal ring 128 at 120 and a metal disc 130 at 122, the closure head in this position presenting a net effective area on which the bottomhole pressure acts to hold the mandrel in its closed position. To re-open the valve, the production string is pressurized to depress a piston 146 to a position in which spring fingers 152 are forced radially into groove 156 in the mandrel by entry of projections 158 into a constricted portion 162 of the housing, the piston in its depressed position abutting the mandrel at 168. The production string pressure is then lowered and the bottomhole pressure eventually becomes effective to raise the piston which is accompanied by the mandrel due to the fingers engaging the shoulder 170. When the projections 158 move above shoulder 160, the fingers expand out of the groove under their own resilience and due to interaction of their ends 155 with the shoulder 170, and the piston eventually abuts shoulder 164. At this stage, the flow rate is unlikely to have reached a value sufficient to produce a pressure drop across the choke beam capable of resisting the force of the spring, and so the mandrel will be depressed but is prevented from reaching a fully-closed position by entry of pin 172 into the choke beam, the consequent increase in the pressure drop across the beam kicking the mandrel back upwards. This cycling of the mandrel continues with decreasing amplitude until the flow rate is restored to its normal value. The upper end of the mandrel carries a tubular element 104 which receives a sleeve 110 depending from sub 58 and defines therewith a dead space to prevent sand from settling on the piston.
Patent GB-1363676-A (GB)
Title: Tip for soldering and de-soldering connector pins of electrical  components
IPC: B23K3/02
Filed: 1971-10-29
Abstract: 1363676 Soldering W M HALSTEAD 29 Oct 1971 50346/71 Heading B3R A soldering or desoldering tip 10 for soldering or desoldering rows of connector pins of a component to or from a circuit board comprises a shank 11 for connection at one end to a heating source and at least one elongated tip body at the other end of the shank extending transversely thereof and having a longitudinally extending groove 16 for containing solder and for receiving pins 17 on an electrical component 18, the groove having continuous, uninterrupted, straight, parallel, fixed side walls and a continuous, uninterrupted bottom. The shank 11 is a screw threaded for connection to a soldering iron and in a preferred embodiment is bifurcated to provide two arms 11a each carrying a tip body 15 which is circular in cross-section and has a longitudinally extending groove 16. The grooves are open ended and may be double bevelled at their ends to form wedges 15a for prizing up bent over connector pins. Solder is retained in the grooves in a molten state, when the iron is heated, by capillary action and for installing a component to a printed circuit board the bodies 15 are applied to the work so that the connector pins 17 are received in the solder in the grooves. Desoldering is similarly effected. Only one tip body or more than two may be used.
Patent GB-1016808-A (GB)
Title: Improvements in or relating to powder-fed flame-spraying torches
IPC: B05B7/20
Filed: 1963-12-20
Abstract: 1,016,808. Spray-producers; flame torches. EUTECTIC WELDING ALLOYS CORPORATION. Dec. 20, 1963 [July 26, 1963], No. 50433/63. Heading B2F. In a powder-fed flame spraying torch 10 in which powder is fed from a resilient container 26 through a valve orifice 46 and a passageway 22 to a space 34 the powder is entrained by the combustion supporting gas before it is introduced to the combustion gas in a mixing chamber 28. The torch comprises interconnected parts 20, 14 and 12, the latter incorporating the nozzle tip. The part 20 includes acetylene and oxygen conducting passages 16 and 18 whilst the central part 14 incorporates the passages whereby the gases and powder are conducted to the mixing chamber 28 as well as the coupling means by which the powder container 26 and a suitable torch handle are connected thereto. The powder feed control valve comprises a rubber member 44 having the orifice 46 which is normally closed under "squeezing" pressure arising from a spring-loaded plunger 48. Such pressure is released on actuation of a pivotally mounted handle 50. The mixing chamber 28 and feed passages 49, 38, 30, 63, 59 are formed in an assembly comprising a flanged member 43, a member 45 having an intermediate flange 55 and a sleeve 47 having powder feed passageways 63 which surrounds parts of both members such as to allow the formation of the powder reception space 34 between them. In operation, acetylene from the passageway 16 passes around a circular duct 51 and through three equi-angularly spaced ducts 49 in the flange of the member 43. The gas then passes. along two longitudinal ducts 53, Fig. 6, into an annular duct 57 from which it passes to the mixing chamber 28 through three equiangularly spaced ducts 59. The oxygen, on the other hand, passes from the passageway 18 through the centre of the members 43 and 45 entraining the powder as it emerges from a restricted section 30 of its passage through the member 43. Flash back is prevented in the present torch by mixing the powder with the oxygen prior to the mixing chamber and also by maintaining the oxygen pressure at between 16 and 25 pounds per square inch whilst keeping the pressure of the acetylene between 3 and 4 pounds per square inch. The sleeve 47 has two powder feed passageways 63 such that it may be correctly inserted into the torch part either way round.
Patent GB-1096555-A (GB)
Title: Improvements in or relating to circuit arrangements for controlling the energization of electronic switches
IPC: H02M7/53854
Filed: 1966-11-10
Abstract: 1,096,555. Semi-conductor pulse circuits PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Nov. 10, 1966 [Nov. 13, 1965], No. 50453/66. Heading H3T. [Also in Division H2] A circuit providing a constant angular delay with variations in frequency for firing thyratrons or thyristors 1, 2 comprises a capacitor 19 which charges when a half-wave voltage Eb is positively increasing, and discharges when a higher half-wave voltage Ea drops below the peak Eb value. A transistor 21 conducts at the end of each charge and discharge to allow a gate and trigger circuit 26 to pass firing pulses to thyristors 1, 2. As the frequency varies, the time to charge and discharge capacitor 19 varies inversely hence keeping the firing angle substantially constant. The arrangement may be incorporated in an inverter for an inductive heating arrangement 9, 10 as shown or in a voltage stabilizing circuit, or rectifier.
Patent GB-1425906-A (GB)
Title: Process of casting  composite metal articles
IPC: B22D19/16
Filed: 1973-10-31
Abstract: 1425906 Casting composite articles UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE 31 Get 1973 [10 Nov 1972] 50554/73 Heading B3F [Also in Division C7] A process for casting composite article, e.g. rolls, shafts and ingots, having an outer skin portion and a centre portion formed of a metal of different composition, comprising bottom pouring into a mould a first molten metal M<SP>1</SP>, allowing the metal to cool until an outer solidified skin P has formed, discharging the remaining liquid portion of the first metal and simultaneously replacing it by a second metal M<SP>2</SP> poured in via the top of the mould, is characterized in that the mould is provided with a discharge orifice 8 having an adjustable valve 9 and the second metal is poured at a temperature higher than that of the first and at a rate such that the level of the liquid metal in the mould remains constant at N<SP>1</SP>. When all the liquid portion of the first metal M<SP>1</SP> has been discharged the valve 9 is closed. The metals M<SP>1</SP> and M<SP>2</SP> may be steels having different compositions, the first being poured at a temperature of 1460‹ C. and the secondat a temperature of 1570‹C. The wheel 10 may be calibrated to indicate when all of the first metal has been discharged. The mould may comprise upper and lower parts, 2 and 5 respectively, lined with sand, and a metal part 3 provided with coolant channels 4.
Patent GB-1276905-A (GB)
Title: Retrieval of holographically recorded data
IPC: G03H1/26
Filed: 1969-10-15
Abstract: 1276905 Holography RCA CORPORATION 15 Oct 1969 [16 Oct 1968] 50731/69 Heading G2J Data stored as a plurality of holograms 28 on a record 10 is retrieved by illuminating one of the holograms (of area 2mm x 2mm) with a laser beam 24, projecting the image on to a photosensitive film 12 to occupy a small area 30 e.g. 6mm x 6mm, developing the film at 16, and then illuminating the developed film with a conventional incoherent light source 17 of higher power than the laser to project an image on to photo-sensitive paper 22 of size e.g. 20cm Î 25cm. The film 12 may be in the form of a strip. Preferably the laser has a power of only a fraction of a watt e.g. 5 x 10<SP>-4</SP> watt and the light source 17 may be a 200 watt tungsten lamp. Both give a recording time of 1 second or less. The film strip 12 is moved intermittently and when stationary a new image is recorded at 30 and simultaneously, if there is an earlier recording, a recording 30 is enlarged.
Patent GB-1162880-A (GB)
Title: A Regulator for a Variable Delivery Hydraulic Pump
IPC: F15B11/02
Filed: 1967-11-08
Abstract: 1,162,880. Fluid-pressure servomotor systems. BENNES MARREL. Nov.8, 1967 [Nov.21, 1966], No.50740/67. Heading G3P. A regulator for a variable output hydraulic pump comprises a chamber 30 connected to a non-return valve 51 supplied by a low pressure pump, to a calibrated delivery tube 48 receiving oil under pressure from the hydraulic pump, to a calibrated relief valve 33, and to an annular chamber 15 in part defined by a cylinder 10 and in part by a sliding sleeve 18, the latter being connected by resilient means, such as a gas cushion 27, to a sliding control rod 19 attached to the output adjusting means 6 of the pump so as to alter the output when the sleeve 18 is moved by the pressure of the fluid in the annular chamber or by the effect of a change in temperature on the resilient means. The means 6 adjust the angle of the pump swash-plate and set the latter for zero delivery when the pump is started and the relief valve 33 is lifted manually through a linkage 41, 40, 39 operated by a cable (not shown). The space 27 is filled through an injection valve 25 with nitrogen.
Patent GB-1176436-A (GB)
Title: Improvements in or relating to Starter Drives
IPC: H02K7/10
Filed: 1968-10-25
Abstract: 1,176,436. Starter drives. BENDIX CORP. Oct. 25, 1968 [Nov. 2, 1967], No. 50775/68. Heading F1K. A starter drive comprises a motor driven shaft 14 having first helical screw threads 34 connected thereto, a shiftable drive portion mounted on the driven shaft comprised of a sleeve member 30 having second helical screw threads 32 slidably engaging the first helical screw threads, a one way clutch 18 and a drive pinion 12. Abutment means delimits the maximum limit of axial travel of the shiftable drive portion relative to the driven shaft. Friction connection means 52, 46, 54 provides a friction connection between the shiftable drive portion and a fixed mounting means, the friction connection means including a resilient member 60 normally applying a loading force to the friction connection to develop a retarding friction force normally urging the shiftable drive portion in an engaged direction releasing means is responsive to the reactive thrust developed on the shiftable drive portion when in contact with the abutment means to relieve the loading force and release the friction connection. Relatively weak springs 70 may provide a light force preventing drift of the shiftable drive portion due to vibration. Relatively strong springs 70 may provide sufficient force to disengage and retract the shiftable drive portion on decelleration of the drive-shaft. The drive may include ignition switch actuated braking means operative to provide a braking resistance on the drive-shaft on opening of an ignition switch.
Patent GB-1108647-A (GB)
Title: Textile bobbin mounting
IPC: D01H7/16
Filed: 1965-12-01
Abstract: 1,108,647. Bobbin mounting. FIBER INDUSTRIES Inc. 1 Dec., 1965 [14 Dec., 1964], No. 50947/65. Headings DID and D1J. A device for mounting a cylindrical bobbin 4 on a rotatable shaft 6 comprises a boss 5 which can be secured on the shaft e.g. by a force fit or by set screws and arms 8 pivotally mounted in equally spaced slots in the boss such that when shaft 6 is stationary there is a portion 13 of each arm lying outside the boss 5 and when the shaft 6 is rotating the portion 13 moves outwards under centrifugal force to grip the inside of the bobbin. The inside walls 12 of the slots act as stops to prevent the arms distorting the bobbin. Boss 5 may be of a plastics material, stainless steel or hard rubber.
Patent GB-1040330-A (GB)
Title: Purification of crude gas obtained by thermal arc splitting of hydrocarbons
IPC: C07C7/11
Filed: 1963-12-24
Abstract: The acetylene and ethylene-containing hot crude gas mixture obtained by pyrolyzing hydrocarbons with hydrogen in the electric arc is purged of cleavage products of more than two carbon atoms 9 of tarry and soot-like constituents in a three-stage process in which (i) the hot gas is treated with excess thermally stable quenching oil at 150-250 DEG  C. to produce a mixture of evaporated quenching oil and quenched gas which (ii) is cooled at 20-30 DEG  C. with a countercurrent flow of cooled wash oil circulating in stage (ii), to condense the oil constituent of the mixture, leaving oil-free crude gas which is compressed to 10-20 atm., cooled to - 30 DEG  to - 50 DEG  C. and then (iii) washed with feed hydrocarbon, of B.Pt. at least 35 DEG  C., pre-cooled to - 60 DEG  to - 80 DEG  C. in a countercurrent flow, to remove the higher cleavage products. Paraffin hydrocarbons of boiling range 200-380 DEG  C. may be used as quenching and washing oils in stages (i) and (ii); the feed hydrocarbon preferably boils between 35 DEG  and 200 DEG  C.  The hot quenching oil charged with tars, polymers and soot which is not evaporated in stage (i) is removed, cooled at 150-180 DEG  C. and recycled, it being replaced with fresh oil when the soot content reaches 20-30% by weight.  The condensed matter obtained on compression after stage (ii) may be recycled to the hydrogen arc, as may the contaminated feed hydrocarbon withdrawn from stage (iii).  In an example, a hydrogen-rich gas is purged of ethane and higher hydrocarbons amounting to 5.4% by volume to yield a gas of final analysis hydrogen 63.4%, methane 8.9%, acetylene 15.7%, ethylene 12.0%, all by volume.
Patent GB-514019-A (GB)
Abstract: 514,019. Watch carriers. FURST, M. Aug. 26, 1938, Nos. 25174, 25175, and 25176. Convention dates, Aug. 26, 1937, Feb. 21, 1938, and July 5, 1938. [Class 43] A device for carrying wrist or pocket-watches suspended in the manner of "sports" watches comprises a pocket, carrying band or carrying plate to which the watch is secured by a holding loop or tongues embracing one or both eyes of the watch, together with a separate carrying strap on the pocket carrying band or carrying plate. In one form, Figs. 1-3, the watch is held within a pocket consisting of a back 4 and a front 1 with a viewing aperture 2, the sides and top being left open but secured together by a strap 8 passing through holes 7 in the pocket and also through holes 9 in a metal or leather loop which passes through one eye of the watch to hold it In other forms the loop may be made as an extension of the back 4 and may be secured by a special clip in place of the holes 9; or the upper edges of the pocket may be sewn together except for an aperture admitting the carrying strap which carries inside the pocket a stud bearing the loop for attaching the watch. Fig. 14 shows a modification, in which 20 is the carrying band, and 19 is the holding loop engaging the eyes 11, 11a of the watch. In yet another form, the watch is suspended in an aperture in a plate 24, by means of metal clips 27, 27a engaging with the eyes 11, 11a.
Patent GB-1405498-A (GB)
Title: Data entry keyboard apparatus
IPC: H04L13/16
Filed: 1972-11-08
Abstract: 1405498 Keyboards BECTON DICKINSON ELECTRONICS CO 8 Nov 1972 [12 Nov 1971] 51536/72 Heading G4H A keyboard comprises a number of keys 10 each arranged when actuated to vary the capacitance of a respective one of a corresponding number of capacitors and a pulse generator for sequentially applying pulses to the capacitors. The pulse generator includes a counter 44 and a decoder 36 supplied with the three least significant bits of the counter output. The decoder sequentially supplies a pulse to each row of keys and a multiplexer 38 fed with the three most significant bits of the counter output sequentially connects each column of keys to a pulse stretcher 48. A shift register 46 which has a number of stages equal to the number of keys is clocked by a generator 40 which also supplies pulses to the counter 44. When an actuated key is scanned by the circuits 36, 38, the pulse supplied to the shift register due to the capacitive coupling provided by the actuated key causes an AND gate 50 and a multivibrator 52 to stop the generator 40. The count registered in the counter 44 therefore represents the actuated key and is fed to a read only memory 56. A circuit 58 prevents the possibility of a depressed key providing erroneous information that it had been actuated more than once, for example due to bounce.
Patent GB-1445853-A (GB)
Title: Dismantlable barriers
IPC: B63B17/04
Filed: 1973-11-07
Abstract: 1445853 Barriers FORNELLS SA 7 Nov 1973 [23 Nov 1972] 51738/73 Heading E1B A dismantlable barrier comprises compartmented plastics rail sections 1 connecting elements 8 associated with spaced supporting posts 10, and joint covers 14 which cover expansion spaces left between adjacent rail sections 1. Two rails may be joined back to back to form a double sided rail, Figs. 6-8 (not shown), and some of the compartments in the rail may be filled with foam plastics, Figs. 15, 17 (not shown). A shock absorber, Fig. 18, may be interposed between the rail and the support post. The rails may be detachably connected to an arm 18, Fig. 11, being locked by cams 32 operated by a handle 34, and the arm clamped to the support post 15 by a known device 16 operated by a handle 17.
Patent GB-1121508-A (GB)
Title: Unsaturated alcohols and the esters thereof
IPC: C07C33/02
Filed: 1965-12-07
Abstract: The invention comprises compounds of the formula <FORM:1121508/C2/1> wherein X represents hydrogen or <FORM:1121508/C2/2> in which R is hydrogen or a C1- 4 alkyl, and Y is a vinyl or ethyl group.  The compounds are made by thermal isomerization of hydronopol to yield 7 - methyl - 3 - vinyl - octen - (6)-ol-(1), followed, if desired, by esterification with a C1- 5 carboxylic acid or by reduction of the vinyl group to give 7-methyl-3-ethyl-octen-(6)-ol-(1) which may be subsequently esterified.  The partial reduction of the 3-vinyl compound may be effected using hydrogen and, e.g. Raney Ni, or by reaction with an organo-aluminium compound, e.g. di-isobutyl-aluminium hydride, followed by hydrolysis. Esterification is effected by known methods, e.g. with the free carboxylic acid and p-toluene sulphonic acid, or with the acid halide in the presence of a base.  The formates and acetates of the alcohols are prepared. The compounds have floral odours and are used in perfume compositions (see Division A5).ALSO:The invention comprises perfume constituents having the general formula <FORM:1121508/A5-A6/1> wherein X represents hydrogen or <FORM:1121508/A5-A6/2> , in which R is hydrogen or a C1-4 alkyl, and Y represents a vinyl or ethyl group. These compounds have a floral odour. Examples of perfume formulations containing the novel constituents and other known components are provided.
Patent GB-519574-A (GB)
Abstract: 519,574. Diazo compounds. DU PONT DE NEMOURS & CO., E. I. ERICKSON,W. A., and WANDERER, F. W. July 22, 1938, No. 21856.[Class 2 (iii)] . Stable diazo-salt preparations are made by mixing or washing an aqueous paste of a diazosalt, other than a sulphate,with acetone, removing the acetone-water solution,and mixing the salt with an inorganic dehydrating agent. The mixing with the dehydrating agent may be effected in a cooled tube of nickel or other metal resistant to corrosion surrounded by cooling means, provided with means for introducing the dehydrating agent at one end, and with discharge means for the mixture at the other end. The acetone-treated diazo salt is introduced at an intermediate point, and the substances are mixed and advanced along the tube by a worm conveyor or propeller arms. In examples (1) the zinc chloride double salts of diazotized p-nitro-o-anisidine or p-cblor-onitranitine are washed with acetone, filtered and mixed with partially dehydrated aluminium sulphate, and (2) the naphthalene 1:5-disulphonate of diazotized m,-chloraniline is similarly treated. Partially dehydrated alums and anhydrous sodium sulphate are also specified as dehydrating agents.
Patent GB-1203974-A (GB)
Title: Contact arrangement
IPC: H01H1/54
Filed: 1967-11-15
Abstract: 1,203,974. Heavy current switches. LICENTIA PATENT - VERWALTUNGS G.m.b.H. 15 Nov., 1967 [16 Nov.; 1966], No. 52006/67. Heading H1N. The contact parts 4, 6, and 5, 7, of parallel stationary and movable contact members 1, 8, respectively are forced together by electrodynamic forces when heavy currents flow between terminals 12 and 10, and the stationary contact member 1 has a U-shaped portion 16, 17, carrying the contact 5 such that the current loops 14, 18, provide magnetic blow-out forces which, when the contacts open, drive both the arcs forming between the contacts in the direction of the arrows 15, 19, i.e. towards a quenching chamber (not shown). The stationary contact member 1 is resiliently mounted by springs 2, 3, and is connected to terminal 12 by a U-shaped flexible current lead 11, 13. The movable contact member 8 is connected to terminal 10 through a flexible lead 9. An external blow-out field (not shown) ensures that the arcs are driven into the quenching chamber.