baber/WOPTO huggingface dataset:
Patent GB-1003279-A (GB)
Title: Purification of rolling mill oil
IPC: C10G31/10
Filed: 1964-04-29
Abstract: Used rolling mill oil, contaminated with water, solid material and tramp oil, is purified by collecting the used oil in a settling tank, withdrawing from the lower region of the tank a dense fraction which is centrifuged to separate a light oil-containing fraction and a heavy water-containing fraction, mixing the thus separated light fraction with a less dense oil and water fraction withdrawn from an intermediate region of the settling tank, and centrifuging this mixture to obtain a purified rolling oil stream and a stream of water containing the tramp oils. This latter stream may be passed to a second settling tank, and separating the upper layer of tramp oil from the underlying water layer, which may be fed back to the first settling tank or the second centrifuge.  Specification 895,997 is referred to.
Patent GB-658169-A (GB)
Title: Improvements in or relating to fluid heaters
IPC: F23M7/00
Filed: 1949-07-06
Abstract: 658,169. Observation devices for furnaces; doors. BABCOCK & WILCOX, Ltd. July 6, 1949, No. 17827. Convention date, July 8, 1848. [Class 51(i)] In a steam generator in which a casing 73 encloses a space divided by a partition wall of fluid cooled tubes into a combust i o n chamber having g fluid cooled tube walls and a convection pass, the walls enclosed by the casing being g disposed and supported as disclosed i n Speci fic a t i o n 625,309, ports through which furnace conditions may be observed or access for clearing the tubes may be obtained are disposed across the junction between two walls. The end and penultimate tubes of tube rows 2 and 5 in the walls 12 and 15 respectively are bent in planes at right angles to one another, taking up positions 2a and 2b and 5a and 5b respectively to define a port 39 which is closed by a door 52 lined with refractory material 76 held by retainers 78 and pivoted to a door frame 53 having side flanges 64 seated on the tube portions 2b and 5b and secured to the casing 73 by bolts 74. The door frame 53 is also secured to the tubes 2 and 5, by means of clamping nuts 69 on studs 67 threaded into socket members welded to said tubes, and as is seen irom Fig. 4, a line of vision is given over each combustion chamber wall.
Patent GB-1111693-A (GB)
Title: Method and apparatus for making an expandable homogeneous mixture
IPC: B01F13/10
Filed: 1965-04-28
Abstract: 1,111,693. Mixing apparatus. ROCMA ANSTALT. 28 April, 1965 [30 April, 1964], No. 17891/65. Heading B1C. In an apparatus and method for preparing foam plastics mixtures first and second starting materials ( e.g. a formalphenol resin and a swelling agent such as pentane) are supplied through metering pumps 8, 14, flowmeters 10, 16 and pipes 9, 15 respectively to a first mixer 11, the mixture from which is discharged through a transparent pipe 35 into a second mixer 36 to which is supplied a third starting material (e.g. an acid hardener such as hydrochloric acid) by metering pump 20, flowmeter 22 and pipe 21. The pumps 14, 20 are coupled at 24 and are driven through variable-throw cranks 25, 26 and the third material is supplied to the mixer 36 at a point 46, 47 or 48 selected according to the desired properties of the product. The mixer 11 has a rotatable shaft 32 with blades 31 interdigitating with fixed blades 30; it may be replaced by one of U-shape, see Fig. 2 (not shown). The first material is maintained at a maximum temperature of 50C by a water bath 7 and the mixture in mixer 11 is frictionally heated by rotation of the shaft 32 at 1500 r.p.m. The pentane may be replaced by solid bicarbonate supplied by a screw conveyor 29.
Patent GB-483790-A (GB)
Title: Valve gear for piston steam engines for locomotives and the like
IPC: F01L31/16
Filed: 1937-06-28
Abstract: 483,790. Valve gear for steam engines. LENTZ, H. J. June 28, 1937, No. 17915. Convention date, June 26,1936. [Class 122 (ii)] Steam engines for locomotives or ships the valve gear of which is actuated by adjustable cam gear mounted on axially shiftable cam-shafts are characterized in that the lifting face of the admission cams gives a constant lift along the whole axial length with generating lines parallel to the axis, of rotation, the part C forming the running off face for use with normal or small charges descending with parallel generating lines whilst the other part C<1> for setting larger quantities has a helical running off face merging into the first part. The admission and exhaust valves 4, 5 are operated by spindles through pivoted tappet members 13 from a cam shaft 10, the valves being held toward their seat by steam pressure admitted from pipe lines 18 through the passage 17. Each tappet member 13 is provided with a projection D adapted to contact with the cam. The admission cams 11 and exhaust cams 12 are for forward running and the admission cams 11<1>, and cams 121 for backward running, and these are carried on the camshaft 10. Each of the two admission cams 11 consist of two parts 11a and 11b, the part 11a having a lifting face A which for its major length is provided with parallel surface C, whilst part 11b is provided with running off surfaces C<1> which is approximately helical. The two cam surfaces are provided with inclined end surfaces F, which co-operate with the bevel edges E of the projections D on the levers 12 when changing over from ahead to astern running, whereby it is unnecessary to throttle the engine down. The two parts of the exhaust cam 12, 121 are plain parallel shapes and they also are provided with inclined surfaces G adapted to coact with the corresponding bevel edges E. The cam-shaft 10 is driven through a universal joint by a shaft 25 geared to one of the driving axles when mounted upon a locomotive. The connection provides a sliding joint 29 so that the shaft 10 can be slidden by the adjusting gear which is linked to the control lever 36.
Patent GB-1188418-A (GB)
Title: Improvements in the Preparation of Semiconductor Nuclear Radiation Detectors
Inventor: SIFFERT PAUL
IPC: H01L29/00
Filed: 1968-04-16
Abstract: 1,188,418. Semi-conductor devices. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. 16 April, 1968 [12 April, 1967], No. 17969/68. Heading H1K. In the manufacture of a PIN diode radiation detector lithium is deposited on to the opposed sides of a P-type germanium block to form layers 17a, 17b. These two layers are shorted together and a drift potential applied between them and an electrode provided on a common face 19 to drift the lithium into the crystal and towards the common face 19. The P-type zone 23 remaining at this point is defined by the curved junction 22. The two sides are now ground or sawn to remove the N-type layers 17a, 17b and a fresh lithium deposit applied to the lower face 18. Lithium is drifted from this towards the upper face 19 to substantially flatten the PI junction 22. The diode is completed by forming ohmic contents on the upper and lower faces. In a modification (Figs. 10 and 11, not shown) each lithium layer 17a, 17b initially extends over a larger part of its respective face and is terminated by a groove parallel to the upper face 19 and deeper than the layer. This prevents upward drifting in the first stage.
Patent GB-1091803-A (GB)
Title: Process and apparatus for treatment of material by centrifugal force
IPC: B04B3/08
Filed: 1966-04-25
Abstract: 1,091,803. Centrifugal strainer, centrifugal separation, film evaporators. J. J. SERRELL. April 25, 1966 [June 16, 1965], No. 17984/66. Headings B1B, B1D and B2P. [Also in Divisions B3, B5 and D2] Apparatus for phase separation, paper making or casting of metal or plastics strip comprises a driven 'endless belt 12 of which part is maintained in the form of a free floating gyre 14 of arcuate or helical form, in which gyre centrifugal separation or casting takes place. In centrifugal straining, belt 12 is foraminous and slurry is fed on to the belt by a nozzle (32) (Fig. 4 not shown) at the start of the gyre, and residual solids removed as the curvature of the belt is reversed (Fig. 5, not shown) at the end (36) of the gyre. A foraminous belt may be single or multi-ply knitted or woven stainless steel, nylon or canvas, perforated metal, leather or rubber, and may have laterally spaced ribs 56. Granular solids are discharged in particulate state into a hopper (38) possibly through a warm gas current, but in paper making a continuous felted strip is produced. The belt 12 may be driven by motor 19 or only by the tangential feed of slurry under pressure on to the belt, which may have vanes to improve the drive. The belt may include a whole number of twists about is axis (as shown) or an odd number of half twists, making it a Moebius surface so that straining in both directions through the belt occurs. The belt may be backwashed prior to pulley 26, pulley 24 may be braked to maintain the length of the gyre and an axial core may support the gyre when stationary. The centrifuged solids may be washed by a nozzle (42), delivering at a different speed from the belt to disturb the solids, housing 16 having two liquid outlets and a dividing baffle 44. A slurry thickness of 0.10 inches and belt speed of 125 feet/ second is envisaged, the helix being 18 inches in diameter. In centrifugal separation of two liquids or a liquid and solid, using an impervious belt 12 (Fig. 6, not shown), longitudinal edge channels (50) retain the heavy phase until discharge point (36) and the light liquid flows off the edges of the belt. In making continuous strips, molten metal or plastics is fed on to an impervious belt 12 with edge ribs 56, or material suspended in volatile liquid may be fed on to a similar belt, which is heated in an evacuated housing.
Patent GB-425978-A (GB)
Title: Safety arrangements for obviating all danger of asphyxiation by or explosion of gas and other applications
IPC: G01N25/46
Filed: 1933-06-23
Abstract: <PICT:0425978/III/1> Means for cutting-off a gas supply in case of leakage and/or for giving warning of such leakage or of fire comprises an electric switch which is closed when escaping gas comes into contact with platinum black, a relay in circuit with the switch, and a valve in the gas supply conduit adapted to be closed by the relay.  The switch consists of a U-tube 3 with circuit wires 5<1>, 5<2>, and bulbs 4<1>, 4<2> containing hydrogen. Elements 10, of platinum black are associated with the bulb 4<1>.  If gas escapes from the service piping 13<1>, the elements 10 heat the bulb 4<1> so that the mercury moves and closes the circuit.  The electromagnet 7 then swings a pivoted latch 19, allowing a spring 17 to raise a plunger 16 and so rock a lever 14 to close a valve 2 in the supply pipe 13.  The switch is enclosed in a gauze casing.  In a modification, the lever 14 carries a part-spherical plug for sealing the point where the lever emerges from the pipe 13, and a spring is applied directly to the valve 2.  In another modification, the free end of the lever 14 acts as the moving iron of the relay, and is locked in valve-closing position by a spring bolt.  In another modification, a secondary circuit including an audible alarm is arranged in parallel with the relay 7.  In another modification, Fig. 6, a switch 4<1>, 4<2>, 3 is used for giving an alarm only in case of gas leakage or for indicating the presence of fire-damp in mines.  In a modification of this arrangement, Fig. 7, (not shown), the bulb 4<2> is enclosed in heat insulation, so that arrangement can serve also as a fire alarm.
Patent GB-596026-A (GB)
Title: Receiver for phase or frequency modulated pulses
IPC: H03K9/00
Filed: 1945-07-14
Abstract: 596,026. Pulse modulation. LAWSON, D. I., and PYE, Ltd. July 14, 1945, Nos. 18058 and 26788. Drawings to Specification. [Class 40 (v)] A receiver for modulated pulses comprises one or more audio-frequency amplifier valves, following the demodulator, a parallel resonant circuit tuned to the pulse recurrence frequency being included in the cathode lead to eliminate this frequency from the output. Specifications 564,511, 581,811 and 620,478 are referred to.
Patent GB-1534541-A (GB)
Title: Optical systems
IPC: A61B1/002
Filed: 1975-04-30
Abstract: 1534541 Lens systems SOCIAL SERVICE SECRETARY OF STATE FOR 23 April 1976 [30 April 1975] 18074/75 Heading G2J A substantially symmetrical lens system, particularly for use in an endoscope, comprises two bi-convex rod lenses 10, 11 separated by two rod lenses 14, 15, the adjacent ends of the lenses 14, 15 being concave and their other ends being convex; the system satisfies the following condition:- |C 4 | # |C 2 -C 3 |where C 2  is the curvature of the surface of lens 10 which is adjacent the lens 14, C 3  is the curvature of the convex surface of lens 14, and C 4  is the curvature of the concave surface of lens 14. Intermediate meniscus lenses 12, 13 of higher refractive index material may be attached to the lenses 10, 11 or 14, 15. In an endoscope a series of such lens systems is used, the spaces between lenses being filled with air or water.
Patent GB-1441190-A (GB)
Title: Apparatus for separating suspensions containing solids
IPC: B01D21/26
Filed: 1974-04-25
Abstract: 1441190 Screw centrifuges BAYER AG 25 April 1974 [28 April 1973] 18088/74 Heading B2P A centrifuge for separating suspensions containing floating solids comprises a rotatable frusto-conical, or partly frusto-conical, partly cylindrical, drum 13, Fig. 1, and a single- or multi-threaded frusto-conical, or partly frustoconical, partly cylindrical, screw 14 rotatable in the drum, a disc-like baffle 15 adjacent the larger end of the drum, openings 16 to allow the liquid to flow out, or stripping means for removing the liquid, at the larger end of the drum, and, at the other end of the drum, openings 17 for the discharge of the solids, the drum having a clarifying zone and a drying zone and the gap between the screw and the drum being wider in the clarifying zone than in the drying zone. The gap between the screw and the drum in the clarifying zone increases from the suspension inlet 12 to the larger end of the drum; alternatively the gap is of constant width. Screw threads may or, as shown, may not be present in the clarifying zone. The screw threads may have a reduced pitch in the clarifying zone. In another embodiment, Fig. 2 (not shown) the baffle and the drum in the clarifying zone are fitted with elements in the form of bars, webs or a sieve cage which form a narrow gap with the screw threads. In Fig. 3, the screw does not have any threads in the clarifying zone and bars 39 fitted to the baffle 35 and the drum 33 carry a thread 30 which forms a narrow gap with the hub of the screw 34. The elements may be fitted to the screw or the screw threads. In a further embodiment, the solids are carried into the drying zone by means of a screw which strips a cylindrical core which does not have a screw thread. The thread of the stripping screw is generally of oposite hand to that of the screw in the drying zone. The stripping screw may be fixedly connected to the drum and the cylindrical core in the clarifying zone is fixedly connected to the core of the discharge screw. Alternatively the screw may be connected to the core of the discharge screw in the clarifying zone and the core in the clarifying zone is connected to the drum.
Patent GB-319402-A (GB)
Title: Improvements in and relating to kegs and drums
IPC: B65D45/30
Filed: 1928-06-22
Abstract: 319,402. Todd, A. T., Todd, M., and Whitfield, D. B. R. June 22, 1928. Heads; hoops and rings.-Relates to drums &c. having wide apertures in which the lids are held in position by an expanded ring. According to the invention the ring 7 is expanded by the relative displacement of two arms 8 which are in rolling contact or pivoted together and are operated by a screw clamp 9. The ring 7 engages a groove, a bead, or projections on the flange of the drum. A seal 11 may be used in conjunction with the screwclamp. Specification 319,409 is referred to.
Patent GB-1131348-A (GB)
Title: Process for checking waterproofness, especially of watch cases and apparatus for carrying out this process
IPC: G01M3/32
Filed: 1967-04-20
Abstract: 1,131,348. Testing waterproofness. FEDERATION SUISSE DE ASSOCIATIONS DE FABRICANTS D'HORLOGERIE. April 20, 1967 [May 13, 1966], No. 18137/67. Heading G1S. A method for checking waterproofing of articles of a given permeability particularly that of time piece cases comprises confining a gas in chamber 7 having a lower permeability than that of the article and of varying volume as the pressure therein varies, introducing the article into the chamber, increasing the pressure in the chamber rapidly up to a determined value, noting the volume of the chamber corresponding to this value, determining as a function of time the decrease in volume of the chamber due to the possible leak of gas from the chamber into the article. The apparatus comprises a reservoir 1, partially filled with liquid in which can be injected a gas under pressure, an indicating system 15 for measuring the pressure in this reservoir, at least one outlet 14 in the form of a tube partially filled with liquid communicating with a chamber 7 containing a certain quantity of gas in which can be placed the article outside the liquid at least the part of said tube near said liquid being transparent and having a small cross-section and means 8 for injecting gas under pressure into the reservoir. The time taken for the liquid in the capillary to move between two fixed marks 4, 5 is measured, the liquid being brought to the mark 4 by the increase in pressure in reservoir 1. If the article is completely waterproof or not waterproof at all the meniscus will stabilize itself immediately and a supplementary test will be necessary. The supplementary test could be performed by placing the opened article into the chamber 7 and noting the volume of the chamber with the test pressure applied to the reservoir or by placing a solid article in the chamber at the test pressure.
Patent GB-644290-A (GB)
Title: Improvements in and relating to microwave power measuring instruments
IPC: G01R21/00
Filed: 1946-06-17
Abstract: 644,290. Power measurements. BRITISH THOMSON-HOUSTON CO., Ltd. June 17, 1946. No. 18140. Convention date, June 19, 1944. [Class 37] [Also in Group XL (b)] In a microwave-power-meter wherein the H.F. concentric transmission line for the electromagnetic wave to be measured is series connected with a bolometer resistance across which a voltage is developed proportional to the wave power, a stub-transmission line (or lines) connected across the main line effects reactance compensation at the mean operative frequency so that the impedance presented to the line by the bolometer and matching section is purely resistive, and a further tunable stubtransmission line connected across the main line between the stub-line and the bolometer resistance provides reactance compensation at other frequencies on the band of operation. As shown, the main transmission line 1 comprises concentric conductors 4, 5 and the bolometer 2 is mounted in a cartridge 7 resiliently held between fingers 6 terminating the conductor 4 and fingers 8 of a contact block 9 which is supported by insulation 11 within a conducting ring 10 secured to the end of conductor 5 to form a concentric capacitor short-circuiting the main transmission line for H.F. currents. Two identical stub-lines 12, 13 are connected across the main line 1. Each comprises an outer tubular conductor 17 seated in a block 18 supported by conductor 5, and an inner hollow conductor 14 screwed at 15 to the inner conductor 4. Tuning plugs threaded at 22 into the conductors 14 are adjusted to cancel out the input reactance of the transmission line 1 at the point of connection of lines 12, 13 at the mid-frequency of the operating band. Between the bolometer 2 and the stub-lines 12, 13 a tunable concentric transmission line 24 is connected across the main line 1. Tuning is effected by a capacitortype plunger 29 of length=“γ at the midband frequency, slidable along the inner conductor 25 in spaced relation with the outer conductor 27. The plunger 27 is carried by a piston 30 supported by an anchor block 32 and is adjusted through a rack 34 and pinion 35 by manually rotating a shaft 36. The length of line 24 is adjusted to a quarter wavelength of the operating frequency which may be indicated on a graduated disc 39 by a pointer 38 on the shaft 36. The length of the main line between the stub-lines 12, 13 and the line 24 is chosen so as to transform the conductance of bolometer 2 to the characteristic conductance of the line 1 at the point of connection of lines 12, 13 thereto, so assuring that the wave power is all absorbed in the bolometer 2. The voltage developed in the bolometer 2 and hence the power of the wave, is measured by a bridge 3 the meter 46 of which may be used to check the voltage of the battery 43 supplying the bridge by operating a push-button 49.
Patent GB-809355-A (GB)
Title: Thiophosphoric acid esters
IPC: C07F9/553
Filed: 1957-06-07
Abstract: The invention comprises thiophosphoric acid esters of formula <FORM:0809355/IV (b)/1> wherein R represents a group of atoms serving to complete a nitrogen-containing heterocyclic ring system containing at least one further nitrogen atom and/or a carbonyl or thiocarbonyl group, and R1 and R2 represent C1-4 alkyl groups.  Specified RN- residues are those of succinimide, thiodiglycollic imide, phthalimide, tetrahydrophthalimide, hexahydrophthalimide, benzazimide, 2-mercapto-benzothiazole and benzotriazole.  The esters may be prepared by reacting the appropriate cyclic N-methylol compounds (Mannich adducts of the heterocyclic systems) with dialkyl phosphite chlorides in the presence of acid-binding agents, e.g. at 20-60 DEG  C., and subsequently adding sulphur to the phosphite formed, without isolation, e.g. at 50-150 DEG  C.  Suitable acid-binding agents include organic amines such as pyridine, triethylamine and dimethylaniline.  An inert solvent is preferably used such as a lower aliphatic ketone, e.g. acetone or methyl ethyl ketone, a hydrocarbon which may be substituted, e.g. benzene, chlorobenzene, toluene or xylene, or dimethyl formamide.  The products are pesticides.  Several examples are give, the reaction being conducted in an atmosphere of nitrogen.ALSO:Insecticidal compositions comprise thiophosphoric esters of formula <FORM:0809355/VI/1> wherein R represents a group of atoms serving to complete a nitrogen-containing heterocyclic ring system containing at least one further nitrogen atom and/or a carbonyl or thiocarbonyl group, and R1 and R2 represent C1-4 alkyl groups. Specified <FORM:0809355/VI/2> -residues are those of succinimide, thiodiglycollic imide, phthalimide, tetrahydrophthalimide, hexahydrophthalimide, benzazimide, 2-mercaptobenzothiazole and benzotriazole.  They may be used in dilution or solution with solid or liquid carriers such as chalk, talc, bentonite, water, alcohols or liquid hydrocarbons. Other active agents may also be present.  An aqueous composition containing O,O - diethyl - O - (benzazimidomethyl) thionophosphate, dimethylformamide and a benzylhydroxydiphenyl polyglycol ether emulsifier is described.
Patent GB-701655-A (GB)
Title: Sizing textile fibres
IPC: D06M13/02
Filed: 1951-08-01
Abstract: A textile size contains a siccative resin, formed of unsaturated hydrocarbons having a high iodine number and a high molecular weight, obtained in the refining of petrols.  The siccative resin may be present in the form of a solution in an organic solvent, e.g. petrol, benzine or carbon tetrachloride, or in the form of an emulsion in water made by grinding a mixture of the resin, water and an emulsifier, e.g. a soap such as potassium oleate.  Siccative and non-siccative oils and other siccatives, e.g. resinates of cobalt or manganese may be included in the size.