baber/WOPTO huggingface dataset:
Patent GB-963888-A (GB)
Title: Signal coupling networks
IPC: H03K17/60
Filed: 1960-08-18
Abstract: 963,888. Semi-conductor diode and transistor switching circuits. WESTERN ELECTRIC CO. Inc. Aug. 18, 1960 [Aug. 21, 1959], No. 28634/60. Headings H3P and H3T., In a switching circuit illustrated generally in Fig. 1, wherein two circuits 16, 17 having characteristic impedances Z0 and sensitive to mismatch with the circuits connected thereto may be connected to or disconnected from each other by means of semi-conductor switches 11 and 13, at least one further semi-conductor switch 10 or 12 connected in series with a respective impedance Zo is closed when switches 11 and 13 are open and vice-versa so that one at least of the circuits 16, 17 is at all times terminated in its characteristic impedance. In Fig. 3 when zero voltage is applied to point 24, diodes 40, 41, 44, 45 are rendered non-conducting by the positive potential applied at point 34. A signal transmission path thus does not exist through the circuit, but diodes 42, 43, 46, 47 conduct to provide proper terminations for the secondaries of transformers 23 and 22. The application of a positive voltage greater than that applied at 34 to 24 causes diodes 40, 41, 44, 45 to conduct and at the same time renders diodes 42, 43, 46, 47 non-conducting. Pairs of diodes 40, 41 and 44, 45 may be replaced by PNP transistors, Fig. 4 (not shown), the baseemitter diode corresponding to one diode of a pair and the collector-base diode corresponding to the other. In Fig. 2 (not shown), all four pairs of diodes are replaced by transistors, those corresponding to diodes 42, 43 and 46, 47 being of NPN type. The transistors may be of symmetrical type. To reduce switching transients the circuit may be modified as shown in Fig. 5, balance being achieved by adjusting the tapping point on potentiometer 50. A similar balancing potentiometer may be inserted between the two halves of the secondary winding of each of transformers 22 and 23.
Patent GB-256445-A (GB)
Title: Improvements in spectacles
IPC: G02C5/22
Filed: 1925-11-13
Abstract: 256,445. Kirk, P., and Kirk, S. M., (trading as Kirk Bros.). Nov. 13, 1925. Spectacles.-The front straps or plates of the hinge-fittings of tortoise.-shell and like spectacle rims fitted with circular lenses are provided with means coacting with recesses in the peripheries of the lens to prevent their rotation in the rims. The plate of the hinge 5 is extended towards the lenses 2 and provided with a projection 7 turned inwards and fitting a recess 8 in the periphery of the lens. This construction is stated to be applicable to the form of hinges described in Specifications 236,492 and 256,439.
Patent GB-652581-A (GB)
Title: Improvements in or relating to knife sharpeners
IPC: B24D15/08
Filed: 1948-11-04
Abstract: 652,581. Knife sharpeners. LASSMAN & CO., Ltd., LASSMAN, S., and FREEDENBERG, D. Nov. 4, 1948, No. 28666. [Class 60] A knife sharpener comprises a pair of flat metal strips 4, 5 in facial contact and each carrying at one end a cutting edge, and a handle 1 within which the strips are enclosed so as to constitute an internal reinforcement for the handle, the strips being so arranged that the two cutting edges 7, 8 are disposed in vee formation, and the handle being so formed as to leave the cutting edges, accessible for sharpening purposes. In the preferred embodiment, two identical strips are riveted together and the sharpening edges are casehardened. The handle, which may be in two parts, is of a lightweight material, such as plastic, and is moulded around the strips which are provided with a hole 11 to facilitate their location in the mould. The cutting edges may be formed from plates of cemented carbide or other material which are brazed or welded to the reinforcing strips. Specification 562,423 is referred to.
Patent GB-688079-A (GB)
Title: Improvements in or relating to mixing or blending machines for pulverulent or powdered material
Inventor: MIDDLETON CHARLES JAMES
IPC: B01F29/63
Filed: 1950-11-23
Abstract: 688,079. Mixing appliances. SAVAGE & CO., (TEA MACHINERY & GENERAL ENGINEERS) Ltd. Nov. 23, 1951 [Nov. 23, 1950], No. 28689/50. Class 86 A mixing or blending machine for pulverulent or powdered material comprises a cylindrical drum rotatable on a horizontal axis and having helically disposed and inwardly extending ribs, fins or breakers, wherein is provided one or more flaps or flails hinged about an axis or axes parallel with but displaced from, and themselves rotatable about the axis of revolution of the drum. As described a drum 10 is supported for rotation upon rollers 15 and has helical breakers 21 of left hand pitch and shorter helical breakers 22 of right hand pitch projecting radially inwards from the drum wall. A pair of angularly spaced plates 33, 34 are clamped to a shaft 27 which is journalled for rotation within the drum in an end wall of the drum and in a frame member 30 secured within the drum. A flail 35 is secured to the plate 33 by a knuckle hinge 38 and flails 37 and 40, loaded by weights 39, 42 respectively, and connected by a knuckle hinge 41, are connected to the plate 34 by a knuckle hinge 38. In operation the drum rotates clockwise and the plates 33, 34 are carried wholly or partially round the axis of the drum with the material as the latter is carried by the breakers 21, 22. During its downward movement each flail rotates on its hinge and falls upon the material lying in the lower part of the drum, dealing to that material a substantial impact tending to compact, and diminish the amount of air held by, the material.
Patent GB-838482-A (GB)
Title: Improvements in or relating to a well tool device
Inventor: WRIGHT KENNETH ANDREW
IPC: E21B37/02
Filed: 1958-09-08
Abstract: 838,482. Wells. B. & W. Inc. Sept. 8, 1958, No. 28758/58. Addition to 779,810. Class 85 A tool for creating turbulence in the annulus between the well casing and the wall of a well comprises a collar 30 (Fig. 1) in halves joined by hinges 33 and bearing longitudinally arranged loops of wire cable 14e. The loops are attached to the collar in the manner disclosed in the parent Specification. The collar is free to turn on the casing and to move longitudinally between the stops 34. Turbulence is created by reciprocating the casing string a distance greater than the permitted movement of the collar. In a modification the wire loops are arranged transversely of the longitudinal axis of the collar (Fig. 4).
Patent GB-1158016-A (GB)
Title: Cow-Milking Installations
Inventor: BAKER ALBERT FRANK
IPC: A01K1/00
Filed: 1967-06-22
Abstract: 1,158,016. Milking installation. A. F. BAKER. 20 June, 1968 [22 June, 1967], No. 28854/67 Heading A1M. Entrance to a milking installation is through entrances each comprising a turnstile rotatable in one direction only so as to prevent a cow leaving by said entrance.
Patent GB-286184-A (GB)
Title: Improvements in associating mechanism for associating the products of printing machines
IPC: B41F13/54
Filed: 1927-10-29
Abstract: 286,184. Hoe & Co., Ltd., R., (Hoe & Co., Inc., R.). Oct. 29, 1927. Associating-apparatus; cutting-apparatus. - Relates to mechanism for associating a highspeed web with a low-speed sheet, or for associating two high-speed webs. The printed lowspeed web L is fed from the printing-machine to co-operating cutting-cylinders 4, 5, the cylinder 4 being twice the diameter of the cylinder 5 and travelling at half-speed. A cutting-knife 9 on the cylinder 5 co-operates with two oppositelydisposed woods 7, 8 on the cylinder 4, which is also provided with sheet-taking devices 12, 13 in the form of pins. The pins 12, 13 feed the severed sheets L<1> to a roller 27 co-operating with the cylinder 4. The cylinder is formed with depressed surfaces 25, in advance of which are the feeding-segments 26 co-operating with the roller 27 to feed the sheets over ,a guides to a cylinder 17. The high-speed web H is fed to the cylinder 17, which travels at twice the speed of the cylinder 4. The low-speed sheet L coming from the cylinder 4 is adapted to be associated with two sheets cut from the high-speed web, and is seized by pins 23 on the cylinder 17 and brought up to the speed of the web H, and the sheet and web together are fed forward, the web being severed by cutting-devices 21, 22 on the cylinders 18. 17. The sheets are then fed by pins 24 on the cylinder 18 to tapes of a, former 32. Alternatively, two high-speed webs may be fed together directly to the cylinder 17, 18.
Patent GB-948912-A (GB)
Title: Improvements in or relating to electric arc apparatus
Inventor: MOSS ASHLEY ROBERT
IPC: B23K10/00
Filed: 1959-08-24
Abstract: 948,912. Vibrating consumable arc electrodes. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Aug. 15, 1960 [Aug. 24, 1959], No. 28909/59. Heading H5H. In an electric arc apparatus, such as a constricted arc or plasma jet torch, spray torch or arc melting furnace having two electrodes, one of which is consumable and neither of which is a workpiece and in which molten globules from the consumable electrode enter the arc, the consumable electrode is vibrated to reduce the size of the molten globules produced therefrom. The vibration is high frequency and may be ultrasonic. The apparatus may be used for arc melting, metal spraying or arc synthesis. In the latter case it may be used for the formation of metallic oxides or nitrides in an atmosphere of O 2  or N 2 . The arc melting or metal spraying may be carried out in a reducing atmosphere or in vacuo.
Patent GB-391158-A (GB)
Title: Improvements in the manufacture and treatment of artificial materials
IPC: D01F2/28
Filed: 1931-10-19
Abstract: Artificial filaments, threads, ribbons, &c. containing organic derivatives of cellulose, in particular cellulose acetate, are stretched after having been subjected to a softening or swelling treatment with solution of solvents or swelling agents in a medium which is a non-solvent for the cellulose derivative, which medium also contains a substance such as a salt, sugar, &c. having the property of reducing the solubility of the solvent &c. in the non-solvent medium in order to augment its softening effect on the material to be treated.  The salts preferred are normal salts that are insoluble in the solvent or swelling agent and are substantially non-hydrolysed by the non-solvent; in particular, they are sodium acetate, sodium or ammonium chloride, ammonium nitrate or sulphate and potassium acetate, and in fact any salt which has the effect of preventing the delustring action of hot or boiling aqueous liquors, or which is capable of restoring the lustre of delustred materials, see Specifications 246,879 and 259,266, [both in Class 2 (ii), Cellulose &c.].  The concentration of the salt, sugar, &c. determines to some extent the lustre of the products, the lustre increasing with the concentration, so that products of high, medium or low lustre or of matt appearance may be obtained.  The material may be treated in the form of hanks, or while travelling from bobbin to bobbin or from a spinning machine to a winding apparatus, or as a warp; and the stretching may be effected by positively-driven rollers or by means of liquid or gaseous currents, for example, the assisting agents may be caused to flow and thus apply tension to the materials; and the stretching may be effected in a number of stages, preferably with a rest period between the stages as referred to in Specification 370,430, or as a very gradual operation.  The stretching may be uniform, or local strained effects may be produced as by the local application of the p  assisting agent.  After or towards the end of the stretching operation, the solvent or swelling agent may be removed as by washing, preferably, in order to conserve the lustre of the materials, with a salt solution or with a solution of the solvent in lower concentration, see Specification 328,911, [Class 2 (ii), Cellulose &c.].  The treated materials may be subjected to other treatments, for example with solvents or swelling agents to modify their lustre, or with alkali solutions to produce a partial or complete saponification of the materials, which saponification may be assisted by solvents or swelling agents present either in the saponifying baths or carried over in the materials from the stretching operation.  Specifications 277,089, 323,790, [both in Class 2 (ii), Cellulose &c.], and 343,062 also are referred to.
Patent GB-712227-A (GB)
Title: Improvements in or relating to telecommunication systems
IPC: H04M11/04
Filed: 1950-03-20
Abstract: 712,227. Manual exchange systems. CLAESSON, P. H. E. March 20, 1950 [March 19, 1949], No. 28998/52. Divided out of 712,176. Drawings to Specification. Class 40 (4) A police alarm system comprises a number of posts common to a line to a central exchange, with means for sending different calling signals to the exchange in accordance with the setting of a switch operated by a door through which access to the telephone may be obtained. The subject-matter is identical with that of Specification 712,176, which claims other features.
Patent GB-1391595-A (GB)
Title: Introducing predetermined quantities of liquid vapour into a gas or vapour stream
IPC: G05D11/03
Filed: 1971-06-22
Abstract: 1391595 Mixing gases B WALLIS 21 June 1972 [22 June 1971] 29081/71 Heading B1C Apparatus for supplying vapour at a predetermined rate to a gas or vapour stream comprises a cell 3 through which the stream flows and a closed reservoir 1 for the material (which may be solid or liquid) which supplies the vapour, connected by a tube 6, the dimensions of which are accurately known, through which the vapour diffuses. A tube 7 equalizes vapour pressures in 1 and 3 so that the meniscus level Z in the tube 6 is constant and the tube is therefore of constant effective length. The reservoir 1 may be immersed in a temperature controlled bath; the tube 6 may be interchangeable and may have a heat insulating portion. The diffusion rate may be altered by using more than one tube 6 or by altering the reservoir temperature. The apparatus may be made of stainless steel, glass or brass.
Patent GB-909450-A (GB)
Title: Self-laying tracks for vehicles
Inventor: LIEBRECHT HEINRICH FRITZ
IPC: B62D55/08
Filed: 1960-08-23
Abstract: 909,450. Endless tracks for vehicles. LEEFORD (LONDON) Ltd. Aug. 16, 1961 [Aug. 23, 1960], No. 29101/60. Class 79(1). An endless track for a vehicle, e.g. a tractor, comprises six track sections 2 pivoted together, each comprising a pair of lateral flanges a ground-engaging portion 4 and a central flange 6 in which is mounted a spindle 15 carrying a pair of rollers 13 which are engaged by the teeth 10 of a sprocket wheel 1 mounted at each end of the back axle of a tractor. The teeth 10 form with the rim of the wheel 1 a groove which embraces the flange 6 which is provided with a hardened capping member 9. Midway along the length of each shoe is provided a bracket 21, 24 which supports a roller 20, and further rollers 28 are provided at the ends of each shoe and possibly also along its length, the rollers 20 and 28 engaging a floating rail 34. Additional rollers and -rail may also be provided on the other side of flange 6. Specification 856,228 is referred to.
Patent GB-174411-A (GB)
Title: Improvements in devices for automatically stopping railway trains
IPC: B61L3/04
Filed: 1920-10-18
Abstract: 174,411. Ogden, T., and Taylor, W. R. Oct. 18, 1920. Track apparatus actuating signals on trains and for stopping trains.-A track contact c, Fig. 4, movable on an horizontal shaft c<4> by connection with a signal wire a, is raised to ' danger ' position so that it moves a lever carried at the front of a locomotive and thereby pulls a chain and rods to remove a supporting-lever k, Fig. 2, in the cab from beneath a weighted lever m, which falls and actuates the lever n to shut off steam, and also through a flexible connection o<1> and a lever p opens a valve in the vacuum brake system to apply the brakes. The apparatus is reset by pulling the flexible connection o<1> and a lever p opens a valve in the vacuum brake system to apply the brakes. The apparatus is reset by pulling the flexible connection o<1> to raise the lever m and pressing down the lever p. A slotted lever allows the ordinary manual operation of the steam lever n. The lever m may be moved by a spring instead of by gravity. A lost-motion device c<5>, c<6>, Fig. 4, allows for some motion of the counterbalance weight before the track contact is actually raised. Two levers are preferably arranged on each locomotive to provided for forward or backward running. The track contact may, of course, be connected through its operating connection with mechanically, electrically, pneumatically, or hydraulically operated signals.
Patent GB-171872-A (GB)
Title: An improved fastening for driving bands and tapes
IPC: F16G3/00
Filed: 1920-10-19
Abstract: 171,872. Dargue, W. Oct. 19, 1920. Belt-fastenings.-A plate a with side teeth a<1> is bent to the form shown in Fig. 3, and the doubled ends of the belt or tape b are inserted between the teeth. A tool c with recessed jaws c<1> is used to force the teeth into the belt ends, and the belt is straightened as shown in Fig. 5, the loose ends cut away, and, if desired, the joint flattened by pressure.
Patent GB-644078-A (GB)
Title: Improvements in or relating to the production of streptomycin
Filed: 1947-11-07
Abstract: In the production of streptomycin by aerobic fermentation of a streptomycin - producing organism (e.g. Streptomyces griseus) under conditions of submerged growth, at least part (e.g. 50-90 per cent) but not all of the culture liquid is separated from the mycelium at the termination of the fermentation for the production of streptomycin (which is preferably continued until streptomycin production has reached a maximum), the said mycelium is reflooded with fresh culture medium (preferably in an amount not substantially exceeding 20 times the volume of the mycelium) and a further fermentation is carried out aerobically under conditions of submerged growth.  The culture mash may be partially separated into its solid and liquid components before removal of part of the latter, but when the mycelium and culture liquid are in intimate admixture it is more convenient to remove part of the former in association with the portion of the latter which is removed.  The fresh culture medium used for reflooding may be of a different composition from that used in the primary stage, e.g. the latter may be a natural type culture medium and the former a synthetic chemically defined medium.  The reflooding process may be repeated several times, or the process may be made continuous by continuously removing a part of the culture mash (liquid and admixed mycelium) from the fermenter and continuously introducing a corresponding amount of fresh culture medium.  Examples illustrate various embodiments of the invention. Specification 624,411 is referred to.
Patent GB-481620-A (GB)
Title: Improvements relating to plastic compositions
IPC: C04B28/10
Filed: 1936-11-02
Abstract: A rubber-cement is made by adding hydraulic material such as cement or calcium hydroxide to an aqueous dispersion of natural or synthetic rubber, such as rubber latex.  In order to prevent premature coagulation of the latex, an alkaline substance, such as alkali carbonate or a caustic alkali, capable of dissolving rapidly in the aqueous portion of the latex, is added to the dry cement powder. Other substances may be added to the dry cement powder, such as casein, hydrated lime, asbestos, pigments, vulcanizing agents, or such compounding fillers as china clay and carbon black.
Patent GB-503248-A (GB)
Title: Improvements in compressed air engines for operating vehicle doors and the like
IPC: B61D19/00
Filed: 1937-11-01
Abstract: 503,248. Compressed-air engines for operating doors &c. PETERS & CO., Ltd., G. D., CARDWELL, C. H., and SHAW, J. Nov. 1, 1937, No. 29808. [Class 65 (i)] A double-acting long-stroke compressed-air engine with a differential piston for operating doors &c. has means for cushioning the piston at the end of each stroke by restricting the escape of air from the cylinder when the piston reaches a predetermined position. The piston 16 and piston rod 17 work in a cylinder 1 closed at one end by a cap 2 and at the other end by a gland 3 through which the piston rod extends to be connected at 19 to the door-actuating mechanism. Fixed in the cap 2 is an open tube extending centrally through the piston rod and open to the air inlet passage 10. The gland 3 has an annular channel 21 open to the compressed air reservoir, and communicating with the cylinder 1 by ports 22, which, at a certain position of the piston, are cut off from the cylinder by a valve 25 mounted on the piston rod and pressed towards its seat by a spring 26 between it and the piston. To close the door, compressed air is admitted to the cylinder by the passage 10 and valve 13, moving the piston to the right and bringing the valve 25 on to its seat. The air in the cylinder to the right of the piston can then escape only through a restricted passage 27 so that the end movement of the piston is cushioned. To open the door, the passage 10 is connected to exhaust, and the air pressure on the right side of the piston then moves it to the left. During this movement air to the left of the piston escapes to exhaust through a series of ports 35 in the tube 33, which are successively cut off by a sealing ring 36 on the piston so that the escape of air is increasingly restricted, until finally when the last port is cut off, the air escapes only through a restricted port 12, thus cushioning the end movement of the piston.
Patent GB-1473931-A (GB)
Title: System for transferring wideband sound signals
IPC: G03B31/02
Filed: 1974-07-05
Abstract: 1473931 Bandwidth compression system INTERNATIONAL STANDARD ELECTRIC CORP 5 July 1974 [11 July 1973] 29904/74 Addition to 1424133 Heading H4R [Also in Division G5] In a sound signal recording system lower frequencies are recorded directly on a film together with amplitude information in respective of partial frequency ranges of the higher frequencies which are recorded as modulation of a sub-carrier, the amplitude information being useable for modulation of substitute signals to synthesize the higher frequency ranges on reproduction. Also recorded is a line pattern to provide a reference signal for use in multiplicative demodulation of the amplitude information on the sub-carrier. As shown the line pattern to provide the reference signal is provided by transverse lines on the line of the film sprocket holes. The reference signal is reproduced by a light source illuminating the lines, the transmitted light being picked up on a light detector PTr after passage through the film F and a reference line pattern RSR on a screen BL, the reference pattern and screen extending over a distance equal to the sprocket hole pitch L s  so that the passage of the sprocket holes causes no modulation of the reference signal. Before the reference signal is used to demodulate the amplitude information of the higher frequency partial bands the reference signal is fed through a phase shifter whose phase shift is controlled by comparison of the reference signal phase with the phase of the reproduced sub-carrier Fig. 3 (not shown).