baber/WOPTO huggingface dataset:
Patent GB-748957-A (GB)
Title: Oxidation of olefins
Inventor: EGBERT ROBERT BALDWIN
IPC: H04N5/74
Filed: 1953-06-22
Abstract: An olefine, in a gaseous reaction stream containing 1 to 6 per cent concentration of olefine by volume together with oxygen and inert gases, is selectively oxidized to olefine oxide by a process comprising passing the stream over a silver catalyst at a temperature in the range 220 DEG  to 250 DEG  C., removing olefine oxide from the stream, passing the stream reduced in olefine concentration and with added oxygen over a silver catalyst in a secondary reaction zone at a temperature in the same range and removing olefine oxide from the stream from the secondary reaction.  The stream may in addition be recycled to either of the two zones.  In the examples a gaseous reaction mixture consisting of ethylene, oxygen, carbon dioxide and nitrogen is treated according to the process of the invention to give ethylene oxide. Specifications 687,243 and 690,718 are referred to.
Patent GB-714803-A (GB)
Title: Improvements relating to the recovery of mixtures of enzymes from fermentation media
IPC: C07K14/315
Filed: 1952-07-08
Abstract: A mixture of streptokinase and streptodornase is recovered from fermentation media by adding sufficient trichloracetic acid to give a 0.1-5 per cent solution (by weight), the temperature being 0-50 DEG C. and the pH 2-5, separating the precipitate, forming an aqueous slurry of the precipitate and bringing the pH to 6.5-8.5 whereby the trichloracetic acid complex is dissociated.  The enzymes in the resulting solution may then be precipitated with a protein precipitant such as a lower alcohol or the solution further purified. Preferred conditions are trichloracetic acid concentration 0.15-0.4 per cent, initial pH 3.0-4.5, final pH 7.5-8.0 and temperature 20-40 DEG  C.  The dead micro-organisms may be removed before the trichloracetic acid is added or may be separated from the reconstituted solution.  The initial adjustment of pH to 2-5 may be effected with any non-oxidizing acid, e.g. hydrochloric, sulphuric, phosphoric or acetic.  For the final step there may be used an alkali or alkaline earth metal hydroxide, carbonate or bicarbonate.  An example is given of the process.
Patent GB-110440-A (GB)
Title: Improvements in Lathes.
IPC: B23Q27/00
Filed: 1916-12-01
Abstract: 110,440. Oldfield, T., and Oldfield & Schofield Co. Dec. 1, 1916. Turning.-In order to turn a part of the circumference of a piece of work such a gun barrel &c. having lugs, trunnions, &c., the face-plate of the lathe is automatically reversed after making a partial rotation in either direction. Two dogs C, Fig. 2, adjustably secured in an annular " T " groove in the face-plate, by means of an arm D, actuate a sliding bolt E connected by linkwork G, J to an electric or other reversing-device forthe face-plate. The gear N driven from the faceplate by the gears shown in broken lines in Fig. 2 is loose on the lead-screw M<1> which it drives interrnittently by means of a pawl U and a ratchet-wheel R keyed on the lead-screw. The cutter-holder V, Fig. 6. is pivoted at W to relieve the cutter on the reverse. To effect a cut over the whole circumference, the bolt E is rotated by means of a milled head Y to move the arm D out of the path of the dogs C
Patent GB-358511-A (GB)
Title: Improvements in and relating to safety razors with resilient blades and having a trough arranged below the blade support
IPC: B26B21/40
Filed: 1930-06-04
Abstract: 358,511. Safety razors. DUDEW, C. D., 15, Wesletzstrasse, Sofia, Bulgaria. June 4, 1930, No. 17261. Convention date, June 8, 1929. Addition to 348,055. [Class 30.] In a clamped blade safety razor of the kind described in the parent Specification wherein there is a lather receiving trough beneath the blade support, the trough is emptied by automatic means such as by suction or by helical wires rotating in a tube. In the two forms shown in the Figure, the trough may taper towards the handle in both longitudinal and transverse directions as shown at 1 and have an inner wall as shown at 1a, or it may be of simple tubular form as shown at 8. The blade supporting plate 7 is narrow and has downwardly bent arms extending from its ends which support a comb guard 10 into longitudinal recesses in which, the trough is clipped. The trough is also supported by the hollow handle 2 connected at 16 with a rubber or flexible metallic pipe leading to the suction means. There is a sealing member 14 on the handle which may be such that by its rotation it opens or closes the one or more holes 13 by which the trough communicates with the handle. The ends of the trough may be shut off by providing it with end walls 15, or the trough may be provided with end bridge-pieces which form a support for the blade. The usual screw clamping and aligning pins are provided. The trough may be made of celluloid or paper.
Patent GB-1322890-A (GB)
Title: Signal-transition frequency measurement
IPC: H03K5/08
Filed: 1972-04-14
Abstract: 1322890 Frequency discriminators PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 14 April 1972 [17 April 1971 18 March 1972] 17287/72 Heading H3A A circuit for generating an output representative of the position of an input signal relative to a prescribed restricted frequency band comprises at least two monostable circuits, having different relaxation periods, whose inputs are coupled to a common signal input and whose outputs are coupled to a combining and smoothing network to produce a smoothed difference signal output which is applied to a threshold circuit. A circuit for determining whether an input signal lies within the band f 1 -f 2 , or the band f 2 -f 3  or whether it lies outside these bands, comprises three monostable circuits 1, 2, 3 having respective relaxation times # 1  = 1/f 1 , # 2  = 1/f 2 , # 3  = 1/f 3 . The outputs from 1, 2, 3 are smoothed in lowpass filters 11, 12, 13, 14 and fed in pairs to difference circuits 15, 16 to produce a pair of outputs V 2 -V 1  and V 3 -V 2 , which are fed to limit circuits 7, 8 to produce outputs on 9, 10 whenever their inputs are positive. When the input frequency at 4 is lower than f 1 , V 1  > V 2  > V 3  and no output is produced on either 9 or 10. Within the range f 1 -f 2  V 1  falls below V 2  and an output occurs on 9. Within the range f 2 -f 3  V 2  falls below V 1  and <SP>V</SP>3 to produce an output on 10. Above f 3 , V 3  falls below V 2  and the condition V 1  > V 2  > V 3  again obtains to give no output. In a modification, Fig. 4 (not shown) the outputs from 1, 2, 3 are combined before filtering to give V 3 -V 1  and V 2 -V 1  and these signals are filtered. One output (on 10) then exists as long as the input is within the range f 1 -f 3  and the other (on 9) is also produced when the input is in the range f 1 -f 2 . With the arrangement of Fig. 1, as modified in Fig. 6 (not shown), the centre frequency f 2  may be varied if the input signal is, for example, a sinewave, Fig. 7(a) which is fed to a slicing circuit (21) and differentiating circuit (22) to produce the pulse train of Fig. 7(c). This is then fed to a half-wave rectifier (24) to produce input pulses 7(e) for monostables 1, 3 and to a full wave rectifier (23) to produce input pulses 7(d) for monostable 2. The spacing # between pairs of pulses in this latter signal is variable in dependence on the slicing level, and varies the limit f 2 . In a modification of this control system, suitable for remote control, the signal for 1, 3 may be derived from that for 2 by means of a bi-stable (27) and half-wave rectifier (29), Fig. 9 (not shown) or the slicing circuit may be omitted and the train of pulse pairs produced by a delay line (31) or further monostable (33), Figs. 10, 12 (not shown).
Patent GB-529956-A (GB)
Title: System of coupling transmission circuits
IPC: H03H7/01
Filed: 1939-06-13
Abstract: 529,956. Wireless receiving apparatus; impedance networks. STANDARD TELEPHONES & CABLES, Ltd. June 13, 1939, No. 17288. Convention date, July 1, 1938. [Classes 40 (iii) and 40 (v)] In a wireless receiving set selectivity is varied by a potentiometer arranged in a link circuit comprising an inductance magnetically coupled to the first tuned circuit and a further inductance without magnetic coupling to other circuits. The link circuit couples the two tuned circuits and as shown, selectivity is decreased as the resistance R4 is increased by moving the slider of the potentiometer P towards 3. At the same time the coupling to and the loss in the oscillatory circuit L2C2 are increased, the two thus tending to keep the amplification constant. The inductances L3 and L4 are preferably equal so that the tuning does not greatly vary. A gain control may be ganged with the selectivity potentiometer to obtain constant amplification. In a modification Fig. 2 (not shown) the junction of the inductances in the link circuit is earthed and the potentiometer connected between their ends with the slider connected to the inductance of the second tuned circuit.
Patent GB-497714-A (GB)
Title: Improvements in methods of making fibres from glass and similar meltable material
IPC: C03B37/06
Filed: 1937-06-22
Abstract: 497,714. Making glass fibres. EDWARDS, A. E. (Naamlooze Vennootschap Maatschappij tot Beheer en Exploitatie van Octrooien) June 22, 1937, No. 17335. [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 23, 1937.] [Class 56] Relates to the manufacture of fibres of glass or similar fusible material by drawing from a molten mass, and consists in keeping any steam used in the process, at such a high temperature, during its contact with the fibres, that condensation cannot take place. The fibres may be made by a process, such as that described in Specification 428,720, in which molten glass flows in thin streams from nozzles b fitted to a furnace, and is drawn into fibres by blasts of steam, or gas containing steam, from blowers c. The current of steam envelops the fibres which pass into a spout d that opens into a hood f where the fibres accumulate on a foraminous conveyer belt g. The steam is superheated, and a burner k is provided at the mouth of the spout d so that hot gases are drawn from the flame into and down the spout. The burner k may be replaced by an annular burner arranged to surround the fibres within the spout d at a point where condensation of the steam is liable to begin. The casing is lagged with heat-insulating material l. Coating-material, such as greasy substances or rubber compounds, is applied to the fibres while they are hot. The material is projected on to the fibres by means of a spray gun n fitted to the back of the hood f and supplied with steam, or gas containing steam, by a pipe p. The spray impinges on all of the fibres and is distributed uniformly on the mat on the belt g. The high temperature at which the spray is applied evaporates water from a coating-emulsion leaving only oil drops of colloidal size to deposit on the fibres. Specification 475,384 also is referred to.
Patent GB-978782-A (GB)
Title: Improvements in or relating to beds and their support means
IPC: A47C19/12
Filed: 1961-05-12
Abstract: 978,782. Beds. R. ROSE. May 12, 1961 [Feb. 24, 1961], No. 17473/61 Heading A4J. [Also in Division E2] A wall-bed hinged to a wall along one of its sides has at least one support leg 8 slidably mounted in a guide member 7, the arrangement being such that when the bed is lowered the leg is extended and locked in its extended position and when the bed is raised the leg is automatically released and retracted. The retraction of the leg is assisted by a spring 9 in the embodiment shown in Fig. 1 by a cord extending from the hinge 2 to the leg and passing over a series of pulleys in the embodiment of Fig. 10 (not shown) and by a linkage connected to the hinge 2 in the embodiment of Fig. 14 (not shown). In the modification shown in Fig. 12 the leg is moved by the rocking of a member 15 the free end of which engages an outwardly extending projection from the leg 8. The means for locking the leg 8 in an extended position may comprise may comprise a latch 11 (Fig. 7) pivotally mounted inside the leg and rockable from a position in which the leg can be retracted to the position shown in which the edge of the latch passes through a hole in the leg and engages the lower edge of the guide member 7. Several forms of latch are described and the latch may engage in a hole in the guide member 7. In a modified locking means (Fig. 17) a ball 26 engages in aligned slots in the leg 8 and guide member 7 and moves to and from this locking position over an inclined inner wall of the leg 8.
Patent GB-1037675-A (GB)
Title: Vacuum deposition of metals
Inventor: WILLIAMS CHARLES NORMAN
IPC: C23C14/30
Filed: 1962-05-08
Abstract: <PICT:1037675/C6-C7/1> A method of coating an article with a metal by vacuum deposition (e.g. of coating a thermoplastic article with Cr) comprises placing the article to be coated in a chamber, evacuating the chamber, causing electrons derived from an electron gun in the chamber to impinge upon and evaporate metal from a part of a source of metal which is positioned in the chamber, the part being moved angularly either intermittently or continuously, and continuing the process until a coating of the required thickness is deposited on the article. The metal source may be in rod or powder form. The Figure shows a Cr rod 6 supported at 5 by a shaft 12 which is angularly movable about its axis. The Cr rod 6 is bombarded by an electron beam 13, and surrounded by a heater 9 and heat shields 11. The rod may be heated prior to and during bombardment.
Patent GB-151129-A (GB)
Title: Improvements in fountain attachments for pens
IPC: B43K1/01
Filed: 1919-07-14
Abstract: 151,129. Marui, H., and Marui, M. H. July 14, 1919. Reservoir nibs.-In a reservoir attachment for ordinary nibs of the type in which a thin metal bowl 10 is formed integral with a curved shank 16 and held under the nib 7 by insertion with it into a holder, the bowl is formed imperforate and with a restricted or tapered opening 17 to prevent leakages. The front portion 11 of the bowl is tapered and the rear portion 12 straight or nearly so. A straight hilt 16 may be provided, or the neck 15 may be bent to suit varying shapes of nib or to increase flexibility.
Patent GB-743934-A (GB)
Title: An improved apparatus for unloading coal, sand or like materials from railway trucks
IPC: B65G65/44
Filed: 1953-06-25
Abstract: 743,934. Scraper devices for unloading railway wagons. STEWART, B. July 6, 1954 [June 25, 1953], No. 17648/53. Class 78 (4). Material is unloaded from rail truck by an arm 1 inserted within the truck carrying at its end a pair of oppositely directed transverse plates 2 pivoted to the arm and adapted to pivot inwardly towards the arm to fit into the corners of the truck while being prevented from pivoting outwardly beyond the aligned position so as to scrape the material from the truck when the arm is withdrawn. As shown, the arm 1 is pivotally carried by a tractor 15 so that the height of the plates can be adjusted by a winch 17. The plates 2 are held in the aligned position by springs (not shown) acting on the inner ends of converging struts 9 pivoted to the plates, these ends being slidable in slots in the arm 1.
Patent GB-875261-A (GB)
Title: Device for anchoring bolts in holes
Inventor: LIBOM KARL HELMER
IPC: E21D21/00
Filed: 1958-06-03
Abstract: 875,261. Bolts. KEREL A. B. June 3, 1958, No. 17653/58. Class 89(1). An anchoring bolt 3, Fig. 1, has a surface 5 inclined to the longitudinal axis, which is engaged by a corresponding surface 7 of a wedge 6; the bolt 3 is also engaged by a curved surface 8, Fig. 3, of the wedge, which surface corresponds to a portion of the bolt's periphery and thereby guides the wedge. Additional guide action is obtained by the engagement of the wedge's circular periphery with the wall of the hole. A wire 10 may be used to position the wedge, and a washer 12, having a bent portion 13, may be provided between a nut 4 and the rock &c., 1. A wedge may be provided at each side of the bolt.
Patent GB-817045-A (GB)
Title: Improvements relating to fixing bridles and tightening devices thereof
Inventor: MUEHLEGG KURT
IPC: F16L3/12
Filed: 1957-06-04
Abstract: 817,045. Band clips. LANZ A. G., H. June 4, 1957. No. 17662/57. Class 44 A pipe, &c. a is secured to a fixing pin c by a flexible metal band b which extends through the apertured limbs of the head of pin c to embrace the pipe and is provided with a tightening device with a screw f. The tightening device preferably comprises two pieces d, e of U-shaped cross-section with transverse openings through which are passed the ends of the band b, the smaller piece d having a threaded hole to receive the screw f carried by the other piece e.
Patent GB-1125916-A (GB)
Title: Improvements in or relating to frequency synthesisers
Inventor: HAMER RONALD
IPC: H03L7/20
Filed: 1966-04-22
Abstract: 1,125,916. Automatic frequency control systems. MINISTER OF TECHNOLOGY. 19 April, 1967 [22 April, 1966; 25 Nov., 1966], Nos. 17677/66 and 52893/66. Heading H3A. A voltage-controlled oscillator 4 is locked to a harmonic of a crystal oscillator 1 by means of a mixer 3, an I.F. amplifier 5 which also acts as a band-pass filter, a phase comparator 6, and an oscillator 7 operating at the centre frequency of the amplifier 5. The amplifier 5 also feeds a detector 10 and threshold circuit 11 which responds when the oscillator frequency is near a possible controlled frequency. When the threshold circuit 11 operates it opens a gate 9, thereby completing the phase locking loop, steps on a digital counter 14 controlling a visual frequency display 15, and reverses a commutator 8 because the locking frequencies are alternately below and above harmonics of the oscillator 1. The commutator 8 may reverse the phase of the input from oscillator 7 to the phase comparator 6. The output frequency of oscillator 4 is determined by an input voltage I which is applied through an inertial network 16 which prevents too rapid an alteration of frequency, so that the oscillator 4 passes through all possible locking frequencies before reaching the selected one, and the counter 14 registers the correct frequency. A connection from the network 16 to counter 14 determines the direction of counting. The gate 9 may be omitted, and the phase comparator 6 and oscillator 7 may be replaced by a frequency discriminator. The oscillator 4 may be tuned by a varactor diode. A more detailed circuit, Fig. 2 (not shown), shows how the commutator and counter are controlled by the detector 10 and by the input I. This input may be derived from a manually adjustable potentiometer (25, Fig. 2), or from a potentiometer (41, Fig. 3, not shown) adjusted automatically by an electric motor (M) until a number on the frequency display is equal to a desired number fed into the display unit. The oscillator 4 may form the first local oscillator of a radio receiver, a second local oscillator being used to interpolate between the possible frequencies of the oscillator 4.
Patent GB-897327-A (GB)
Title: Improvements in and relating to the valve operating mechanism of internal combustionengines
IPC: F01L1/12
Filed: 1959-05-25
Abstract: 897,327. Valve gear. SEATON, W. May 25, 1959, No. 17687/59. Class 7(6). In a four-stroke engine having push rod operated valves 4 biased to the closed position by helical compression springs 3, the push rods have enlarged heads 13 accommodated in hollow tappets 14 and compression springs 16 urge the tappets against their cams. The compression springs 16 may be about double the length of and exert 25% or more of the pressure of, the springs 3.
Patent GB-1278016-A (GB)
Title: Improvements in or relating to casting eyeglass frames or parts thereof
IPC: B29D12/02
Filed: 1970-04-14
Abstract: 1278016 Moulding spectacle frames AMERICAN OPTICAL CORP 14 April 1970 [15 April 1969] 17708/70 Heading B5A Spectacle frames, or parts thereof, are produced by mixing liquid, substantially 100% reactive solutions of an epoxy composition and hardener, preheating the mixture to less than 200‹ F., metering it into the mould cavities at a rate preventing air bubble formation, heating the mould to polymerize the mixture and removing and degating the products. The mixture may be moulded under pressure and is preferably degassed before moulding by placing under vacuum after mixing. It is preferably fed into the bottom of the mould cavity.
Patent GB-1135610-A (GB)
Title: Method of manufacturing a synthetic product having an internal sparkling effect, and products obtained by said method
Inventor: JOOS PIERRE EMMANUEL
IPC: B44F1/14
Filed: 1967-04-18
Abstract: 1,135,610. Sparkling film. LES ETABS MARECHAL,S.A. 18 April, 1967, No. 17774/67. Heading B5B. [Also in Divisions B2, B6 and C3] A plastics product having an internal sparkling effect is produced by preparing a plastisol comprising a base resin which is intrinsically transparent one or more plasticizers, one or more substances having a stabilizing action upon the resin against heat, light and oxidation, and at least one liquid substance not miscible with the resin and having a boiling point lower than the gelling temperature of the plastisol, depositing the plastisol in the form of a thin layer of a permanent or temporary support, heating it to a temperature at least equal to the gelling temperature, cooling it and if appropriate separating it from the support. The immiscible liquid may be glycol ethers. The resin may be polyvinyl chloride, vinyl chloride copolymers with vinyl acetate, vinylidene chloride. The plastisol may contain a suitable colouring agent and may be deposited on a permanent support constituted by a white film as parallel bands separated by short intervals. The product may then be cut into strips and the strips connected by a joint of white plastics material thereby imitating a tiled surface. The joints may also be obtained before the gelling by using a gouge to remove a furrow of plastisol. In example 1 a plastisol comprising polyvinyl chloride tetrachlorodiphenyl, alkyl benzene, decyl phthalate, octyl epoxystearate, tin butyl maleate, methyl glycol is deposited on a endless metal strip which is then heated to 150 to 190‹ C. by I.R., cooled and the product separated from the endless strip.
Patent GB-110060-A (GB)
Title: Improvements in Dust Distributors.
Inventor: BURDICK CHARLES LAURENCE
IPC: B05B7/14
Filed: 1916-12-11
Abstract: 110,060. Burdick, C. L., and Hill, L. G. Dec. 11, 1916. Powder blowers.-In a dust-distributor, which may be used for delivering fuller's earth &c. into the ventilating-shafts of mines, the dust is contained in a cylindrical casing 1, Fig. 1, and is blown through one or more tubes 4 carried by arms 5 by means of compressed air issuing from one or more nozzles 7. The container 1 mav have a cover 2 carrying a hood 3. Before passing to the nozzles 7, the air is purified by a moistureextractor 10, 11 and by a strainer consisting of a cloth bag 9 removably suspended in a tube 8. The flow of air is regulated by a valve 6'. An additional nozzle 12<1>, Fig. 3, may be arranged to discharge a blast of air across the stream issuing from the tube 4.