baber/WOPTO huggingface dataset:
Patent GB-1469013-A (GB)
Title: Etching semiconductor slices
IPC: H01L21/308
Filed: 1974-09-30
Abstract: 1469013 Etching PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 30 Sept 1974 [3 Oct 1973] 42344/74 Heading B6J [Also in Division H1] In a method of making semi-conductor devices comprising chemically etching a silicon or germanium slice in an etching bath, silicon is added to the etchant prior to the first etching treatment. The silicon may be added to the bath, which includes HF acid and at least one oxidizing agent, in elementary form, as silica gel or as finely divided silicon oxide. The slice of Si or Ge is secured by one face to a glass support and etching is carried out in a rotating beaker. The Si content of the etchant is said to give greater smoothness and uniform thickness of the slice after etching which apparently depends on sodium ions in the etchant resulting from its action on the glass support. The glass has a coefficient of expansion which differs from that of the slice by at most 25%. The oxidizing agent may be HNO 3  which, by weight, is more than <SP>2</SP>/ 3  the quantity of active HF and is preferably at least equal to this quantity. Some of the HF combines with the added Si to form H 2 SiF 6 . The bath may be re-used by replenishing the consumed etchant constituents with some unused etchant. The slice may have circuit components on the side facing the glass support which include beam leads. The etching treatment may be for forming grooves through the slice.
Patent GB-991669-A (GB)
Title: Improvements relating to fluid flow control valves
Inventor: MASHEDER HENRY
IPC: F16K1/22
Filed: 1962-11-09
Abstract: 991,669. Valves. LINCOLN VALVES Ltd. Nov. 7, 1963 [Nov. 9, 1962], No. 42460/62. Heading F2V. A butterfly valve comprises a valve closure member 12 rotatable about an axis 14 located between two seats 4, 6. The valve closure 12 has a flat surface 22 which is parallel to the direction of flow when the valve is in the open position and a curved surface 23 so shaped that the thickness of a cross-section in a plane perpendicular to the axis 14 on the upstream side is greater than that at an equal distance from the edge on the downstream side. The broken line 40 indicates the shape of a symmetrical closure. The increased thickness may extend over substantially the whole width of the closure or it may taper on either side of the centre. The valve may be closed by rotation in either direction from the open position with the closure engaging seat 4 in position 12b or seat 6 in position 12a. The seats are flexible and may be supplied with fluid pressure to expand the seats into engagement with the closure. The pivotal axis 14 may be midway between the valve seats and the downstream seat 6 may be replaced by closing the valve on the upstream seat. The valve is actuated by a fluid motor with auxiliary manual means. Specification 991,670 is referred to.
Patent GB-1439700-A (GB)
Title: Insulating element
IPC: F02P7/04
Filed: 1973-09-11
Abstract: 1439700 Rotary distributors; switch covers ROBERT BOSCH GmbH 11 Sept 1973 [12 Sept 1972] 42609/83 Heading H1N An insulating element having one or more tubular projections 5 for receiving one or more high-voltage components of a combustion engine ignition system comprises a cupped body having a peripheral wall 2 which is composed of closed-cell rigid synthetic plastics structural foam material to the extent of at least 50 per cent of its weight, wall 2 having a cellular core 3 and non-cellular outer exposed skin 4. The foam may be of polyurethane or polyisocyanurate and may include a flame or combustion suppressing substance such as aluminium oxide hydrate. The rigidity of the wall may be increased by adding a filler such as kaolin, talcum or mica. The object is that the element should be thermally insulated to reduce condensation on the interior of the element.
Patent GB-1329003-A (GB)
Title: Polyalkenamers and methods for their production
IPC: B01J31/00
Filed: 1970-09-07
Abstract: 1329003 Regulated cyclic olefin polymerization; linear polyalkenamers CHEMISCHE WERKE HULS AG 7 Sept 1970 [8 Sept 1969] 42720/70 Heading C3P Internally unsaturated cyclic mono- or polyolefins are polymerized in the presence of molybdenum, tungsten, rhenium or tantalum or their compounds and as molecular weight regulator, of an acyclic or aromatic olefin of the formula in which R<SP>1</SP>, R<SP>2</SP> and R<SP>3</SP> each independently denote hydrogen, a linear, branched or cyclic alkyl radical having up to 20 carbon atoms or an aryl radical having 6-14 carbon atoms which is unsubstituted or which bears 1-5 linear, branched or cyclic alkyl radicals having up to 10 carbon atoms as substituents. The products are linear polyalkenamers having terminal groups derived from the regulators. In examples cyclopentene, cyclododecene, cyclooctene, norbornene, or cyclooctadiene-1,5 are polymerized in the presence of WCl 6 /AlEtCl 2 ŒEtOH or MoCl 5  or TaCl 5 /AlEtCl 2  together with as regulators isobutene, cis-butene-2, cis or transstilbene, 3-methylpentene-1, styrene, 4-methylpentene-1, octene-1, 3,3-dimethyl butene-1, 2- ethylhexene-1, 2,3-dimethylbutene-1, n-octene isomers, ethylene, and in comparative examples, butadiene - 1,3, isoprene, 2,3-dimethyl-butadiene, hexadiene-2,4, cyclopentadiene, cyclododecadiene 1,3 or cyclooctadiene-1,3.
Patent GB-1480515-A (GB)
Title: Sensing devices
Inventor: CARLNES B E
IPC: G01V9/00
Filed: 1974-10-02
Abstract: 1480515 Gauging B E CARLNAS and  B C I SUNDVALL 2 Oct 1974 [12 Oct 1973] 42809/74 Heading G1M A fluid gauging device comprises a continuous slot 4 through which fluid may be passed to produce a substantially closed curtain of fluid, and a passage 5 having an opening 1k by means of which the pressure within the curtain can be sensed. The opening 1k may be circular or rectangular. As shown in figure 3, the slot is formed by a gap of constant width between parallel surfaces lh, 3a, but the surfaces may be non-parallel so that the gap narrows to the front of the device. The slot 4 may be rectangular, the length to width ratio preferably lying in the range 10-2 : 1, semicircular or elliptical. The device may be used to sense the distance dd or d s  in Fig. 3. The device may be used to control the positon of a plate Fig. 6 (not shown). Alternatively, the position of a plate or slotted strip may be controlled using a sensing device on either side. The sensing device may also be used to count the number of slots in a slotted material.
Patent GB-1323167-A (GB)
Title: Mercapto-substituted terpenoid
IPC: A23L27/10
Filed: 1970-09-08
Abstract: 1323167 Flavourings L GIVAUDAN & CIE SA 8 Sept 1970 [10 Sept 1969] 42886/70 Heading A2B [Also in Divisions A5 and C2] Foodstuffs contain P-menthane-8-thiol-3-one as an odorant or flavourant.  Reference has been directed by the Comptroller to Specification 1224860.
Patent GB-1517350-A (GB)
Title: Metallurgical converter or melting furnace
IPC: C21C5/48
Filed: 1975-10-21
Abstract: 1517350 Cooling furnace walls ASEA AB 21 Oct 1975 [29 Oct 1974] 43111/75 Heading F4B A metallurgical converter or melting furnace provided with a nozzle 5 through which material in solid, liquid or gaseous state may be injected for refining or stirring purposes, includes an exchangeable or replaceable wall portion 14 arranged above the nozzle 5. The wall portion 14 comprises an inner wedge-shaped body 9 of refractory material, e.g. brick, which is surrounded by at least one cooling channel 15 and is received in a two-part outer wedge shaped body 8. The outside face of the wall portion 14 is covered by a protective plate 2. The nozzle 5 comprises inner and outer blocks 10 and 7, a rammed compound 11, a metallic body 3 arranged around the compound 11 and provided with coolant channels, and a tube 12 through which the material is injected into the melt. The nozzle also includes a stud 4 arranged in an end plate 6. The drawings show a tiltable, induction heated converter.
Patent GB-1270039-A (GB)
Title: Electronic timepiece
Inventor: BESSON RENE
IPC: G04C3/10
Filed: 1969-08-29
Abstract: 1,270,039. Electric timepieces. EBAUCHES S.A. Aug. 29, 1969 [Aug. 30, 1968], No. 43247/69. Heading G3T. An electric timepiece comprises a driving mechanism which also acts as the regulator, the oscillations of the mechanism being electrically sustained by a transistorized circuit including a pick-up winding 14 and a driving winding 12, 13, and two plates 15, 16 on which the windings are secured, the plate 15 also carrying the transistor 11 and some of the other circuit elements 25, 26. The driving and regulator mechanism consists of a symmetrical resonator having two flexible tines 1 joined by a portion 1a and a lug 1b for fixing the resonator to a base plate 2. A magnet and a rigid arm 4 having an enlarged portion 4a are secured to the free end of each tine 1. A counterweight 6 and a rotatable triangular member 7 are mounted on each portion 4a, the centre of gravity of each member 7 being set off-centre by a hole 8 so that rotation of the member 7 provides a frequency adjustment of the resonator. The plates 15, 16, which are made of insulating material, are secured to the base-plate 2 by screws 17-21 which also provide electrical connections between some of the circuit elements, the circuit being supplied by a battery 10. The windings are stuck on the edges of the plates at 22, 23. A ratchet wheel 34 is rotated by a pawl 32 and a pawl 35, mounted on an adjustable plate 37, prevents reverse rotation of the wheel. The wheel 34 is freely mounted in a supporting sleeve 44 to assist assembly of a plate 47. Motion is transmitted to a seconds hand via wheels 41-43, to a minutes hand via wheels 48-51 and to an hours hand via wheels 52-55. The wheel 49 is coupled to the pinion 50 by a friction coupling comprising a spring 61, the ends 61a, 61b of which engage a collet 59 forced on a bush 50a of the pinion and an axis 62. A hands setting stem 65 has three positions, in one of which it rotates a date crown 63 for setting a calendar date indication. Reference has been directed by the Comptroller to Specifications 1, 099, 665, 955, 559 and 854, 196.
Patent GB-1177431-A (GB)
Title: Multiple Web Winder
IPC: B65H19/22
Filed: 1967-09-22
Abstract: 1,177,431. Web winding. PAPER CONVERTING MACHINE CO. Inc. 22 Sept., 1967 [3 Oct., 1966], No. 43295/67. Heading B8R. Apparatus for winding a web on a plurality of mandrels comprises a winding drum, at least one turret equipped with a pair of mandrels, means for rotating the mandrels in the same direction as the winding drum in an orbit adjacent the winding drum, a rider roller which rotates in contact with a web being wound, and which moves out of contact when the mandrels are alternated, and cutting means operably associated with the rider roller for severing the web following alternation of a fully-wound mandrel for an empty mandrel. General arrangement (Fig. 1).-A web 16 is guided by a feed roller 17 and dancer roller 19 to a longitudinal slitter 33, and is then fed by nip roller 30 to a winding drum 13 which is preferably chrome-plated; the respective parts of the web are then passed to turret winders 10, 11. In Fig. 1, turret 10 orbits or indexes about shaft 27 in the indicated direction as web roll 40 builds up on mandrel 25; when roll 40 is complete, the turret undergoes further indexing to bring mandrel 26 to position 26<SP>1</SP> and to bring the completed roll to a removal position. Turret 11 illustrates this latter position, with web roll 41 complete at removal position, mandrel 42 ready to wind a further roll and the web 161 about to be cut between the roll 41 and the mandrel 42. The winding drum 13 and the mandrels all rotate in the same direction; thus, the surfaces of the web rolls are always spaced from drum 13, the webs being led partially by rider rollers 31, 32 which ride on the web roll surfaces throughout winding except when a roll is alternated to removal position when the roller, e.g. 32, is displaced, by pneumatic means, to position 32a. A gear train (not shown) drives all the rollers and drums including drum 13, turrets 10, 11, mandrels 25, 26, 41, 42 and the rider rollers 31, 32. Auxiliary rider rollers 52, (54) are also provided on each turret with pneumatic means for moving them into contact with a complete web roll to prevent unravelling, or into contact with an empty mandrel during cutting (Figs. 2, 3, not shown). Cutting means.-The web 16<SP>1</SP> is severed by a knife (43) which is supported between two arms (39) which also support the rider rollers 31, 32, so that the web is severed when the rollers are disengaged from a wound web roll (Figs. 4, 5, not shown). Cutting is performed under the action of a pneumatic cylinder and piston unit.
Patent GB-992062-A (GB)
Title: Improvements in or relating to adsorption apparatus
Inventor: GREGORY SYDNEY ABSELL
IPC: B01D53/04
Filed: 1960-12-16
Abstract: 992,062. Gas adsorption apparatus. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 31, 1961 [Dec. 16, 1960], No. 43403/60. Heading B1L. The invention comprises gas or vapour adsorption apparatus having at least two adsorber vessels with internal heat transfer tubes, each vessel containing a column of solid adsorbent, an inlet and outlet arranged for vertical flow of purge gas and process gas therethrough, supply delivery lines for process gas and purge gas, and flow connections for returning purge gas from either of said vessels through the cooler to the main stream of process gas, said apparatus operating on a reactivation cycle consisting of a heating period during which the heaters are in operation and a succeeding cooling period during which the heaters are inoperative and cooling is effected by passing cooling gas through the heat transfer tubes, and operating on an adsorption cycle wherein during the heating period of the reactivation cycle purge gas is passed through under pressure. The purge gas may be drawn from the main stream of process gas before or after passage through the first adsorber, and additional heating means for the purge gas may be incorporated. The used purge gas may be added to the process gas stream through an injection nozzle. In the circuit of Fig. 1, process gas, after passage through vessel A, is tapped off at point 7, used to purge vessel B, and passed through cooler 3 and an injection nozzle at 2. In the modification shown in Fig. 2, purge gas is tapped off through line 6 and heater 5 before use to purge vessel B. The apparatus may be used to adsorb water vapour from air or carbon dioxide from mixtures with nitrogen. Molecular sieve adsorbents may be used. Specifications 986,792, 990,228, 990,229 and 990,230 are referred to.
Patent GB-1143019-A (GB)
Title: Production of sols
Inventor: GRANT DAVID
IPC: C01B33/32
Filed: 1966-09-30
Abstract: 1,143,019. Silica sols. MONSANTO CHEMICALS Ltd. 21 Aug., 1967 [30 Sept., 1966], No. 43795/66. Heading C1A. Aqueous dispersions of silica particles are made as follows: aqueous silicic acid, having an acid pH, is added to a heated vessel containing a heel comprising a dispersion of silica particles of size greater than 500Š in aqueous alkali metal silicate solution, and water is evaporated, preferably at atmospheric pressure, from the vessel during addition of the acid, which is best added over a period of 7 to 9 hours. The resulting sol comprises particles of disymmetry diameter greater than 500Š. The initial composition of the heel is such that the molar ratio M 2 O (where M is an alkali metal) to overall silica is 1 : 5 to 40. The quantity of aqueous silicic acid is such that the silica particles in the initial heel represent not less than 1 % of the total silica content of the product, and such that the ratio M 2 O: overall SiO 2  in the product is 1 : 50 to 300. Sols containing 20-55% silica by weight may be made by the process described above (which is for sols containing up to 20% SiO 2 ) followed by evaporation to the required concentration. Silica particle disymmetry diameters from 500Š to 10,000Š can be obtained although sols of particle disymmetry diameter greater than 2500Š tend to deposit on standing.
Patent GB-1243446-A (GB)
Title: Rotary action electric switch with linearly guided operating slider
IPC: H01H19/635
Filed: 1969-09-05
Abstract: 1,243,446. Rotary spindle switches. SCHOELLER & CO. 5 Sept., 1969 [3 Oct., 1968], No. 44068/69. Heading H1N. A rotary-slider switch comprises a sleeve 4 with internal thread 5 mounted on a spindle 3 with operating knob (not shown) for rotation of said sleeve 4, and a rectilinearly movable contact slider 7 having a drive pin 8 engaging in said thread 5. The slider 7 carries printed-circuit contacts for co-operation with spring-plate fixed contacts 35 moulded in a casing 9 secured to a cylindrical housing 1 by lugs (24, Fig. 1, not shown). Hexagonal surfaces 25 on a member (6, Figs. 4 and 5, not shown), co-operate with flat spring blades (20, 21) to locate switching positions. End limits are defined by abutment of sleeve 4 with end wall 2 and by a projection 29 on member (6) engaging a stop 30 in housing 1. The member (6) also has a hexagonal bore fitting on a hexagonal portion (27, Fig. 3, not shown) of spindle 3 and may be fitted thereon such that the relative position of projection 29 and stop 30 selectively limits the number of switching positions.
Patent GB-1349013-A (GB)
Title: Turbo retarders
IPC: F16D65/78
Filed: 1971-09-22
Abstract: 1349013 Hydraulic retarders BENNES MARREL 22 Sept 1971 [1 Oct 1970] 44136/71 Heading F2E An hydraulic retarder for retarding a shaft, 7, for example on a vehicle is contained in a selfcontained unit with a radiator 2 and cooling fan 6 fixed to shaft 7 and is connected to the top and bottom of the radiator by pipes 3, 4 respectively. In normal operation when it is not required to retard rotation of shaft 7 a valve 33 operated at the drivers cab is in the position shown in which oil circulation between chambers 24, 27 is prevented by engagement of a sliding valve member 36 with a fixed seat 35. Centrifugal rotors 20, 21 draw in air through an aperture 42 in valve 33 and force it between fixed blades 16 and through aperture 28 and pipes 29, 30, 32 to an air chamber 31 in the radiator 2. Air is drawn through a pipe 32 back to aperture 42. When it is required to retard rotation of shaft 7 valve 33 is moved so that a groove (34) Fig. 3 (not shown) thereof is shifted to cut off pipe 32. A fork 39 is also shifted and after pipe 32 is cut off it engages the back of a groove 38 provided in member 36 which is thereby driven to compress a washer 37 and establish connection between oil chambers 24, 27. Oil is drawn by rotor 20 into chamber 24 and is forced between blades 22 and fixed blades 16 to brake the shaft 7. Oil is forced through aperture 28, pipe 30 into radiator chamber 31, where it is cooled and returns by pipes 4, 25, 26 into chamber 24.
Patent GB-975647-A (GB)
Title: Floor treating device with articulated handle
IPC: A47L11/40
Filed: 1963-11-11
Abstract: 975,647. Handles for floor polishers. ELECTROLUX CORPORATION. Nov. 11, 1963 [Dec. 28, 1962], No. 44357/63. Heading B4K. The pivoted handle of a floor polisher comprises a lower section 20 having a transverse hand grip 22 at its upper end, an upper section 36 and means for pivotally connecting the lower end of the upper section to the upper end of the lower section 20 so that the sections may be folded with respect to each other. The parallel legs 18 of the lower handle section 20 are attached to the base 10 of the polisher by pivot pins 16, a releasable latch 24 being pivotally mounted on one of the legs 18 and engaging a pin 28 projecting from the motor housing 12, whereby the lower section of the handle is releasably locked in an upright position. The upper section 36 comprises parallel resilient arms 38 joined at their upper ends by a manipulating handle 40. The lower end of each arm 38 has a concave surface which matches a convex surface at the upper end of each leg 18. Pivot pins 50, extending through the respective arms and legs in the region of the convex and concave surfaces, carry cams 48 which when rotated bear against the legs 18 and pull the arms 38 inwards to lock the two sections in rigid straight line position. A bracket adapted to hold a liquid wax container 64 is secured to one of the arms 38. Pivot means between the upper part of the bracket and arm 38 allow the container to remain upright regardless of the pivotal position of the upper handle section.
Patent GB-908359-A (GB)
Title: Internal combustion engines
Inventor: HOLT GEORGE ALLEN
IPC: F02B21/00
Filed: 1959-12-31
Abstract: 908,359. Combustion chambers. RICARDO & CO., ENGINEERS (1927) Ltd. Dec. 7, 1960 [Dec. 31, 1959], No. 44465/59. Class 7(3) The wide mouths of combustion pockets 10, 19, in the cylinder head and piston overlap around top dead centre so that the pockets communicate with one another temporarily through a restricted throat 21. The air charge rotates in each pocket and after injection into pocket 10, the burning gases are discharged tangentially through the restricted throat into the pocket 19. The pockets may be substantially hemispherical or may have frusto conical upper and lower portions and a cylindrical centre position. The mouths may be slotted to provide the overlapping portions 21. Specification 617,795 is referred to.
Patent GB-1037989-A (GB)
Title: Improvements in or relating to adhesives
IPC: D06M17/04
Filed: 1964-11-02
Abstract: 1,037,989. Laminates. H. JEDLICKA. Nov. 2, 1964 [Nov. 2, 1963], No. 44653/64. Heading B5N. Two tapes of absorbent fibrous material, e.g. of cotton, wool, or cellulosic fibres, are coated respectively on both sides with an adhesive component such as an epoxy resin and a component such as a polyamide reactable with the first, e.g. acting as a hardener therefor. In use the tapes are superposed and compressed between surfaces or articles it is desired to adhere together, the pressure causing interdiffusion of and reaction between the components. During storage of the separate tapes a parting layer, e.g. of silicone impregnated paper may be rolled up therewith.
Patent GB-972254-A (GB)
Title: Improvements in or relating to time control devices
Inventor: PHILLIPS KENNETH RICHMOND
IPC: G05G7/12
Filed: 1961-12-13
Abstract: 972,254. Ratchet gearing. S. SMITH & SONS (ENGLAND) Ltd. Dec. 13, 1962 [Dec. 13, 1961], No. 44660/61. Heading F2Q. [Also in Division G3] A time control device actuating switching mechanism in a predetermined time sequence for a water heater and driving motor in an electrically operated dishwasher comprises a cam 12 driven at constant speed by an input synchronous motor 46 through reduction gearing, an output shaft 10 carrying switch cams (not shown), and an arm 14 oscillated by the cam 12, carrying a spring-biased pawl 16 engageable with a ratchet wheel 21 fixed on the output shaft, and carrying a finger 22 engaging a sequencing masking wheel 23 perpetually rotated step-by-step by the input motor through cam-actuated ratchet gearing (Fig. 1, not shown) or, as shown, a Geneva mechanism 51, 57. The masking wheel 23 has projections 36 and gaps 8 of different circumferential widths to suit the dishwasher programme, the projections and gaps co-operating with the finger 22 to respectively prevent and permit step-by-step rotation of the ratchet wheel 21 by the pawl 16. For changing operational sequence, different masking wheels may be provided, either separately assembled or ganged for selection. As shown, a gear 40 driven from the motor 46 drives the cam 12, through a reducing gear train, and the masking wheel 23, through a reducing train and the Geneva mechanism which comprises a driving member 51 having teeth 55 and a driven member having tooth spaces 56 and locking segmental recesses. Any one of the gear train spindles may be extended to carry a knob manual rotation of which imparts rapid mechanism movement to bring the parts to required positions. Specification 968,587 is referred to.