baber/WOPTO huggingface dataset:
Patent GB-1017793-A (GB)
Title: Hydraulic self-regulating valve tappet for piston engines
IPC: F01L1/245
Filed: 1964-02-28
Abstract: 1,017,793. Hydraulic tappets. MOTOMAK MOTORONBAU - UND WERKZERY. FABRIK KONSTRUKVIONEN G.m.b.H. Feb. 28, 1964 [March 2, 1963], No. 8388/64. Heading F2K. [Also in Division F1] The pressure chamber 20 of an hydraulic tappet 1 for a piston engine, which chamber is connected by a non-return valve to a reservoir 17 supplied with pressurized oil from the engine lubrication system, has at least one leakage bore 24 leading to the outside of the tappet, the oil flow therethrough being controlled by a throttling gap between the pressure chamber walls and a member in the chamber, the throttling gap narrowing as the temperature rises to maintain a substantially constant leak rate through the bore(s) 24 in spite of the falling oil viscosity with rising temperature. The tappet comprises a member 8 containing the reservoir 17 and being slidable in a sleeve 7 closed at one end by a cam contacting head 2, a spring 21 urging the sleeve 7 and member 8 apart to take up any slack in the valve linkage. A ring 23 limits the outward movement of the member 8. In Fig. 1, a valve disc 18 held by a leaf-spring 19 forms the non-return valve. A sleeve 25 having a higher coefficient of thermal expansion than the sleeve 7 is located in the pressure chamber 20 to form the throttling gap controlling the flow to the leakage bores 24. In a modification (not shown), the sleeve 25 is replaced by a bi-metallic strip, angularly located in the sleeve 7 by a peg. In Fig. 3 (not shown), the leakage bore 24 is through the head 2 of the tappet, a cylinder 33, of higher coefficient of thermal expansion than the head 2, being housed in a bore 32 of the head 2 to form the throttling gap. A ball 31 replaces the valve disc 18.
Patent GB-714877-A (GB)
Title: An improved earth boring machine
IPC: E21B7/02
Filed: 1952-04-03
Abstract: 714,877. Liquid storage tanks. COHEN, M. I., and GULLY, R. J. April 3, 1952 [April 5, 1951 ; Nov. 27, 1951], No. 8480/52. Class 69 (1). [Also in Group XXI]  To the underside of the top of a liquid storage tank are screwed a plurality of tubes 81 which extend from the comers of the tank up into the filler neck 82 thereof to a substantial distance above the top of said tank. By this disposition of the tubes 81, atmospheric pressure is always maintained above the surface of the contained liquid when the tank is tilted.
Patent GB-988541-A (GB)
Title: Gas turbine rotor cooling
Inventor: HYDE JOHN ALAN COURTNEY
IPC: F01D5/08
Filed: 1962-03-06
Abstract: 988,541. Gas turbine rotor cooling. RUSHTON & HORNSBY Ltd. Jan. 4, 1963 [March 6, 1962], No. 8518/62. Headings F1G and F1T. The rotor and blade roots of an axial flow gas turbine having blade carrying discs spaced axially apart by rotating sealing rings secured therebetween are cooled by fluid passing through passages between the discs and sealing rings to an area in the region of the blade roots enclosed by annular plates on either side of each disc, the plate on the interstage side of each disc being located at its radially outer edge by the blade platforms and at its radially inner edge by an extension on the interstage sealing ring. An axial flow gas turbine has rotor discs 11, 12 carrying blades 13, 14 separated by a sealing ring 15 attached to the discs. The upstream and downstream rims of discs 11, 12 are enclosed by annular plates 25, 26 respectively, retained between blade platforms 19, 20 and slots in the disc rims. The interstage rims of discs 11, 12 are enclosed by annular plates 27, 28 secured to blade platforms 19, 20 by circlips 29, 30 and engaging extensions 32, 33 on sealing ring 15. Plates 27, 28 may be tapered radially outwards and may be locked to ring 15 by dowels. Cooling fluid flows respectively through passages 34, 36 to space 38 from which it exhausts through holes 37, 39 and through passages 35, 40 to exhaust through holes 41, 42. The blades 13, 14 may also have internal cooling passages. In a modification, Fig. 2 (not shown), the sealing ring has additional cooling passages and the interstage annular plates are split and not retained by circlips.
Patent GB-596449-A (GB)
Title: Method of making metal rectifiers
IPC: H01L21/08
Filed: 1945-04-06
Abstract: 596,449. Making rectifier discs. STANDARD TELEPHONES & CABLES, Ltd. April 6, 1945, No. 8550. Convention date, May 2, 1944. [Classes 83 (iii) and 83 (iv)] [Also in Groups II and XXXVI] Blank punching ; knurling.-In making a metal disc to be coated with selenium to form a rectifier element, discs 13 blanked from a strip 16, Fig. 2, by means of a punch 18 are passed beneath a knurling roll 11 and then beneath a smooth pressure roller 22 which bends over the projections produced by the roll 11 and so forms hooked keys for retaining the selenium layer. In a modification, the discs are only partially removed by the punch 18, Fig. 3, and are pressed back into the strip 16 before passing beneath the knurling and pressure rolls. The blanks are subsequently removed from the strip. In a further modification the strip is passed beneath the rollers and the discs are subsequently punched from the treated strip.
Patent GB-940685-A (GB)
Title: Improvements in or relating to radio-frequency pulse generating circuits
Inventor: MILLAR WILLIAM
IPC: H03K3/80
Filed: 1961-03-08
Abstract: 940,685. Generating oscillations. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. March 8, 1962 [March 8, 1961], No. 8573/61. Heading H3B. A circuit for generating a pulse of radiofrequency oscillations having a substantially constant amplitude over a portion of its period comprises a tank circuit L1, C1 and a driving circuit L2, C2, S2 which are tuned to the same frequency and have a common spark gap ST. The oscillation in the two circuits are in antiphase in the spark gap ST. Spark gap S2 in the drive circuit is fired to initiate the pulse which is transferred by transformer action to load R5. Capacitor C1 in the tank circuit is charged to - 2 kv through resistor R1 and capacitor C2 in the first drive circuit is charged to 20 kv through resistor R2. Spark gap S2 breaks down at 14 kv and starts an oscillation in the drive circuit L2, C2, S2. At the same time, a voltage is transmitted by capacitor C5 to break down the spark gap S1 at 3 kv and to start a tank oscillation in antiphase to the drive circuit oscillation. After a delay, a spark gap S3 in a second drive circuit is fired by transformer T1. The transformer T1 has a core of square hysterisis loop material and is biased to saturation by windings, not shown. When S2 fires, a tuned circuit L5, C6 commences to oscillate at its own characteristic frequency. The first half-cycle tends to drive the core further into saturation and the second halfcycle reverses the core and fires gap S3 in the second drive circuit. After a further delay, spark gap S4 may be fired in a third drive circuit. The induction element of the tank circuit may be split into two elements LT1, LT2, Fig. 3, to snatch the load to the spark gap ST. Spark gaps may be used in parallel to increase the power transferred from drive circuit to tank circuit (Fig. 5, not shown).
Patent GB-810946-A (GB)
Title: Electrolytic shaping of semiconductive bodies
IPC: C25F3/12
Filed: 1955-03-24
Abstract: 810,946. Electrolytically etching and plating conductors; semi-conductor devices. PHILCO CORPORATION. March 24, 1955 [March 26, 1954], No. 8582/55. Classes 37 and 41. A semi-conductive body is shaped by an electrolytic etching process in which a control potential is also applied to a portion of the body to modify the distribution of etching current within the body and so control rate and/or direction of etching. The control potential may be applied to the body through a metallic contact which may provide an ohmic, rectifying junction, or rectifying area contact, or through a non-etching electrolyte, in each case a reverse-biasing potential being applied to a rectifying barrier in the body to form a current-carrier depleted region having an outline of the shape desired for the body. Typically a 3 mil. wafer 10 of N-type germanium is electrolytically etched, using a jet of zinc sulphate solution to produce a clean surface and by reversing the current flow is plated with zinc to produce a rectifying contact 48, the wafer 10 is then turned over to the Fig. 2 position and a negative bias is applied between the contact 48 and the annular ohmic baseplate 11 soldered to the wafer. The wafer is then electrolytically etched through the annular space whilst illuminated and produces a substantially parallel-sided wafer, e.g. of 0.15 mil. thickness, at 55. This may be used as a photocell or a contact of zinc plated into the depression to form a transistor of the kind disclosed in Specification 805,292, followed, if desired, by heating to effect diffusion to form a junction transistor. Alternatively the rectifying contact 48 may be etched away to leave merely a shaped semi-conductive body. If P-type germanium is used it may have an electro-plated antimony contact and may be heated to cause diffusion of the antimony to form a P-N junction prior to etching with a positive back bias. The apparatus used may be substantially similar to that of Specification 805,291. If different electrolytes are used for plating and etching, the plating electrolyte may be zinc sulphate and the etching electrolyte may be sodium nitrite. Silicon is preferably electrolytically etched using sodium nitrite and strong illumination with an immediately prior cleaning etch in hydrofluoric acid. Instead of applying the back bias between the carrier depleted region and the annular base-plate, it may be applied between said region and the inert electrode which completes the circuit through the electrolyte. By altering the applied bias at successive times recesses of stepped form may be obtained. Instead of using a jet of electrolyte, the region to be treated may be limited by means of a paraffin wax resist, the surface to be treated being immersed in a bath of electrolyte. Etching may be effected with either D.C. or A.C.
Patent GB-1414986-A (GB)
Title: Process for fractionating a mixture of glycerides
IPC: C11B7/00
Filed: 1972-02-24
Abstract: 1414986 Fractionating fatty oils UNILEVER Ltd 22 Feb 1973 [24 Feb 1972 (2) 12 Sept 1972 (2)] 8647/72 8648/72 42393/72 and 42397/72 Heading C5C A mixture of liquid and crystalline triglycerides of fatty acids is fractionated by dispersion in water in the presence of two surfaceactive agents of which one has an HLB value above 10 and the other an HLB value below 5 in such concentration that the interfacial tension is below 0À5 dyne cm<SP>-1</SP>, and separating the liquid fraction from the water and dispersed crystalline fraction. The second surfactant may be a monoglyceride of an unsaturated fatty acid, e.g. oleic, linoleic or linolenic, and may be added to the mixture of triglycerides, which may be groundnut oil, partly hardened soyabean oil, palm oil, cottonseed oil, butter or butter olein. The first surfactant may be an alkali-metal decyl sulphate, a water-soluble soap of a saturated fatty acid of 6-10 carbon atoms or a watersoluble soap of an unsaturated fatty acid, e.g. oleic, linoleic or linolenic. The two surfactants may both be added to the oil, or the first surfactant may be generated in situ in the oil, e.g. by adding potassium carbonate to a mixture of triglycerides that contains free fatty acids. They are preferably added to the oil before crystallization, and the aqueous phase is preferably added after crystallization. This aqueous phase may contain a salt dissolved in it, e.g. NaCl, K 2 SO 4 , NaNO 3 , NH 4 NO 3  or KCl. Separation may be by centrifuge.
Patent GB-146589-A (GB)
Title: Improvements in or relating to station sets for intercommunication telephones
IPC: H04M9/00
Filed: 1919-04-05
Abstract: 146,589. Murray, R. L. April 5, 1919. Intercommunication systems and apparatus.- In systems of the type in which a selector arm is moved under the control of an electro-magnet to find the calling line when the hand-set at the called station is removed from its cradle, the locking means for arresting the selector arm is provided with backlash between the arm and its lock and the contacts engaged by the arm are so arranged that when the hand-set is replaced the arm moves off the contact engaged by it and opens the circuit over the selector arm. The selector at one station is thus released independently of the subscriber at the other station. The locking-magnet is controlled by a relay in circuit with the selector arm. The construction of the selector is identical with that described in the following abridgment 146,590. In the system shown in Fig. 2, station 4 is shown as having called station 17, station 13 being in its normal condition. To call station 17, subscriber 4 moves the hand switch C (the contacts of which are connected to the contacts of the finder switch A) to contact 17, and removes his hand-set, whereupon his selector arm moves over all the line contacts until it reaches the last contact A<2>*, which is connected to switch C. The ringing-key P is then depressed, current passing from the positive lead N<2>, over key P, arm C, line R<17>, home line L<17> at station 17, contacts L<0>, L<1>, and bell M to negative lead N<1>. When the called subscriber removes his receiver, his switch A rotates until the arm A' reaches the contact of the calling station, when a circuit is completed over the calling line R<4>, contacts L<0>, L<2> at station 4, speaking battery J, relay K, arm A<1>, last contact A<2>*, switch C, line R<17> to station 17, contacts L<0>, L<2>, battery J, relay K, arm A<1> to line R<4>. The batteries J being in series, the relays K at each station are energized and close the circuits of the respective locking-magnets E. At the called station 17, the magnet E arrests the selector A, and at both stations the magnets E close contacts F<2> in local circuits of the receivers G<2> and secondaries H<2>. The microphones G<1> and primaries H<1> are connected at each station in parallel with the relays K. When either or both subscribers replace their hand-sets, the movement of the cradle causes the driving spring to move the selector arm off its contact (owing to backlash between the detent D<1> and the ratchet D), thereby opening the circuit including the relays K at each station, whereby the magnets E de-energize and allow the springs to return the selector arms to their normal positions. In its normal position, the selector arm is at such a distance from the first line contact as to ensure that the selector may be arrested on this contact when necessary. Specification 146,591 also is referred to.
Patent GB-613063-A (GB)
Title: Mobile gun mount
IPC: F41A23/28
Filed: 1946-03-21
Abstract: 613,063. Field gun carriages. SPECIALTY EQUIPMENT & MACHINERY CORPORATION. March 21, 1946, No. 8746. Convention date, March 18, 1944. [Class 92 (i)] A portable gun-mount comprises a box-like body 10 mounted on wheels 22 at one end and on ground-engaging jack-legs 16 at the other end. The gun 50 is carried by a shield member 32 which is trained round the periphery of a bearing ring 31 mounted on the frame by an operator seated within the ring 31 who actuates, through a gear-box 34 mounted on the shield 32, a pinion engaging with a fixed circular rack on the bearing ring. Specification 566,729 is referred to.
Patent GB-100752-A (GB)
Title: An Improved Method of Blasting and Means for Carrying Out same.
Inventor: AMBROSE KOWASTCH
IPC: F42B3/087
Filed: 1916-06-24
Abstract: 100,752. Kowastch, A. Nov. 21, 1914, [Convention date]. Blasting cartridges and tampings.-Relates to the use of liquid air and like liquefied gases in conjunction with an absorbent therefor, and consists mainly in enclosing the absorbent in a flexible porous casing so that it may absorb the liquid air by immersion and be then flexible enough to fit a bore-hole accurately. As shown in Fig. 1, the casing a is closed by tying a string round the end b, the lead d of the detonator being doubly bent and secured by the same wire. The casing may comprise several layers of material; or an impermeable casing may be lined with porous material or provided with porous parts. These cartridges may be cooled by inserting into them liquefied or solidified gases, such as oxygen, nitrogen, and hydrogen; or the cartridges, after immersion in the liquid air, may be dipped in water or a solution of salt. a layer of ice forming around the cartridge. The borehole may also be cooled by liquefiedor solidified gases before the introduction of the cartridge. The tamping is formed with a hole. or the bore-hole with a widened part to accommodate the leads of the detonator and to vent the gases evaporated from the impregnated cartridge.
Patent GB-335198-A (GB)
Title: Improvements in or relating to electric signalling systems
IPC: G08B5/36
Filed: 1929-03-19
Abstract: 335,198. Lichter, I. J. March 19, 1929. Selective signalling-apparatus. - Relates to a signalling system more especially adapted for use in hospitals or other buildings for calling doctors or other persons located in different parts of the building. As shown different stations throughout the building are provided with a signal, preferably a visual signal SL, associated with a local switchboard G comprising a plurality of switches A - - E, 1 - - 5, different combinations of which are allocated to different persons. In the arrangement shown the switches are used in pairs so that 25 different persons may be called. The various stations equipments are connected in parallel to a central station switchboard H, comprising individual call switches A1 - - E5 and their associated lamps, by two groups of conductors AL - - EL, 1 - - 5. A manually or automatically operated switch IB at the central station connects the power supply F successively to the line wires AL - - EL and to the lamp and switch groups A - - E. Assuming a person whose designation is " A2 " enters station G, corresponding switches A, 2 are operated and remain depressed while the person remains at the station. Switches A, 2 prepare circuits for the signalling device SL and if it is desired to notify the person that his presence is required elsewhere, the corresponding switch A2 at the central station is operated to complete the signalling circuit. Upon each rotation of the central station switch IB the remote station signalling relay is operated over switch A to complete the signalling circuit over switch 2 and central station switch and lamp A2. The system also enables different persons to be called simultaneously.
Patent GB-737127-A (GB)
Title: Process for the conversion of damp fibrous methyl celluloses into powder having a high rate of dissolution
IPC: C08B11/02
Filed: 1953-04-01
Abstract: Moist, fibrous methyl cellulose is converted into a particulate form having a high rate of solubility by homogenizing under pressure fibrous methyl cellulose with a water content of 50-70 per cent by weight, grinding the homogenized product and subsequently drying at a temperature above the coagulation temperature (viz. 60 DEG  C.) of methyl cellulose.  Homogenization is effected in worm presses or kneading pumps which are preferably cooled.  High-speed grinding-apparatus, such as a hammer basket-mill or the apparatus described in Specification 497,131, is employed.  Before drying, the material may be sifted.  During drying the material is preferably suspended in a gas current.
Patent GB-981331-A (GB)
Title: Improvements in and relating to props or jacks
Inventor: REYNOLDS REGINALD
IPC: E21D15/55
Filed: 1960-03-14
Abstract: 981,331. Hydraulic pit props. ACROW (ENGINEERS) Ltd. March 1, 1961 [March 14, 1960], No. 9016/60. Heading E1E. [Also in Division B8] An hydraulic pit prop or jack is provided with releasable extension or cap 6 secured thereto by opposed spring-loaded differential plungers 14, 16 engaging aligned apertures in the said member 6.
Patent GB-1470271-A (GB)
Title: Manufacture of di-thiophosphory-disulphides
IPC: C07F9/165
Filed: 1975-03-05
Abstract: 1470271 Preparing di(thiophosphoryl)disulphide MONSANTO CO 5 March 1975 [6 March 1974] 9079/75 Heading C2P A di(thiophosphoryl) disulphide of the formula (RO) 2 P(S)SSP(S)(OR) 2  wherein R is an aliphatic, cycloaliphatic or aromatic radical is obtained by adding an alkali metal hypohalite to an aqueous solution of an alkali metal salt of a phosphorodithioic acid ((RO) 2 P(S)SH) while maintaining the pH of the solution at 6 or above whereby the said disulphide is formed by oxidation and an alkali metal base is generated from the hypohalite, and also adding a mineral acid (e.g. HCl or H 2 SO 4 ) or the phosphorodithioic acid itself, the quantity of acid added being equivalent to, or equivalent to a major portion of, the base generated from the hypohalite. The hypohalite and the acid may be added alternately or concurrently and the mixture is preferably maintained at pH 7-10 while the addition of reactants is continuing. The process is preferably effected in the temperature range 5-25‹ C. and may be carried out in water or in a mixture of water and a polar organic solvent, e.g. an aliphatic alcohol, e.g. in a 50/50 volume mixture of water and methanol or isopropanol. When the dithiophosphoric acid itself is used as the added acid complete conversion to the product may be attained by adding a further quantity of the hypohalite and adjusting the final pH to 8 or below by addition of mineral acid. Examples are given in which the alkali metal hypohalite used is sodium hypochlorite, the alkali metal salt is the sodium salt formed by adding NaOH to the dithioic acid and either hydrochloric acid is used alone as the acid or the phosphorodithioic acid itself is used with subsequent addition of hydrochloric acid.
Patent GB-509275-A (GB)
Title: Improvements in or relating to insecticides and the like
IPC: A01N25/02
Filed: 1938-03-24
Abstract: 509,275. Insecticides ; proofing permeable materials. CORPORATE INDUSTRIES, Ltd., and ROBB, C. WRIGHT-. March 24, 1938, No. 9095. [Class 81 (i)] [Also in Group VIII] A liquid composition for destroying insects and for application to fabrics, furs, books, wood as a preservative, comprises naphthalene and paradichlorbenzene dissolved in white spirit as a common solvent. A perfume, e.g. oil of lavender, may be added. A solvent of somewhat greater volatility than white spirit, which has a B.P. of 195‹ C., may be used when treating delicate fabrics. Pads or sachets may be impregnated with the composition.
Patent GB-138765-A (GB)
Title: Improvements in saws for ginning or delinting cotton seeds
IPC: D01B1/06
Filed: 1919-04-10
Abstract: 138,765. Sweet, P. H. April 10. 1919. Gins.-In saws for gins and apparatus for delinting cotton seeds, the teeth are formed upon segmental bands which are removably clipped to the periphery of the disk which forms the body of the saw. In the form shown in Fig. 1, clips 17 are punched from the body of the band, passed through apertures 16 in the disk, and clinched, the ends of the clips being formed with protuberances which engage with other apertures 19 in the disk. Several forms of clips are described and illustrated.