baber/WOPTO huggingface dataset:
Patent GB-313316-A (GB)
Title: Improvements in the production of esters from acid amides
IPC: C07C67/20
Filed: 1928-06-12
Abstract: 313,316. Smith, H. G., and Imperial Chemical Industries, Ltd. June 12, 1928. Esters; butyl formate. - Esters of organic acids, particularly higher esters such as butyl formate, are prepared by the action of acid amides on alcohols in the presence of free sulphuric acid. The acid, preferably in excess of the quantity required to fix all the ammonia formed, may be allowed to drop into an equimolecular mixture of an alcohol and an amide, such as formamide or acetmide, and in cases where the ester produced has a lower boiling point than the alcohol, and does not form an azeotropic vapour therewith, the reaction may be performed under a reflux. The formation of esters by the action of alcohols on amides and on amide acid sulphates is referred to.
Patent GB-1364038-A (GB)
Title: Process for the production of hulupones
IPC: C12C5/02
Filed: 1973-04-10
Abstract: 1364038 Hulupones ATLANTIC RESEARCH INSTITUTE Ltd 10 April 1973 [10 April 1972] 17099/73 Heading C2C The invention comprises a process for the photosentsitized oxidation of lupulones to give a hulupone-containing beer-soluble bitter-tasting product in a liquid alkaline medium by means of oxygen or an oxygen-containing gas, wherein the lupulones are submitted to an only partial oxidation in the presence of sensitizing dyes and under the action of visible light, and wherein the oxidation is continued until the oxygen consumption resulting from the reaction exhibits a substantial decline or until the fall in pH occurring during the reaction substantially ceases.
Patent GB-278792-A (GB)
Title: Improvements in illuminated letters or display signs for advertisement and like purposes
IPC: G09F13/28
Filed: 1926-07-08
Abstract: 278,792. Broughton, W. H. July 8, 1926. No Patent granted (Sealing fee not paid). Name-plates, letters, and the like.-Sign letters &c. formed of lines of electric lamps are built up from letter bases d, Fig. 4, and a series of detachable lamp-carrying sections a<1>, a<2>, a<3>, furnished with wiring connections or terminals and lamp sockets. The sections may be curved or rectangular in shape and carry several lamps, or may be cylindrical or cubical and carry one lamp. Fig. 3 shows a section a furnished with plug sockets b attached by screws f to a letter d, which may have a channelled front with or with. out a transparent or gauze cover i.
Patent GB-787553-A (GB)
Title: An apparatus for washing an endless conveyor belt, more particularly the conveyor belt of a screen printing machine
IPC: B41F15/24
Filed: 1956-06-04
Abstract: 787,553. Conveyer belt cleaning devices. STORK & CO.'S APPARATENFABRIEK N.V., GEB. June 4, 1956 [June 24, 1955], No. 17195/56. Class 78 (1). A cleaning device for the conveyer belt 15 of a screen printing machine comprises a trough 3 containing cleaning liquid which is positioned transversely below the belt, a horizontal shaft 8 extending longitudinally of the trough above the level of the liquid and carrying at spaced intervals along its length discs 13 which dip into the liquid, guide rollers 14 mounted in the upper part of the trough to support the belt clear of the discs 13, and a motor 12 to rotate the shaft 8 at high speed so that liquid is thrown up on to the belt by the discs 13. A screening plate 17 avoids too much liquid being picked up by the discs. The level of liquid is maintained constant by providing an overflow pipe 6 and continuously feeding the liquid into the trough through a supply pipe 5. The device is pivoted to the conveyer frame at 2 so that it can be swung downwardly for cleaning.
Patent GB-1270747-A (GB)
Title: A stopwatch or chronograph
IPC: G04F7/04
Filed: 1970-04-10
Abstract: 1,270,747. Watches. DAINI SEIKOSHA K. K. April 10, 1970 [April 16, 1969(2)], No. 17199/70. Heading G3T. A stopwatch or chronograph is provided with a hammer 1 having surfaces 1a, b which cooperate with cams 3, 4 on arbors 3<SP>1</SP>, 4<SP>1</SP> for zeroing minute and seconds hands respectively. The hammer 1 pivots about a spindle 2 when actuated by means of its projection 1f, and its surface 1b is positioned on a resilient portion 1c to provide accurate zeroing of both cams 3, 4. The surface 1a may alternatively or additionally be on a resilient portion. A groove 1g in a further resilient portion 1d co-operates with a fixed pin 5 to produce a force on the cams 3, 4 which varies in a non-linear manner with the position of the hammer 1.
Patent GB-1498463-A (GB)
Title: Electromagnetic contactor with interlock
IPC: H01H9/38
Filed: 1975-04-25
Abstract: 1498463 Contactor interlock WESTING- HOUSE ELECTRIC CORP 25 April 1975 [8 May 1974] 17230/75 Heading H1N An electromagnetic contactor 5 is provided with a shock-resistant interlock comprising a casing containing pairs of contacts 29, 31, the movable contacts 29 being mounted on a carrier 25 which is biased towards the contactopen position by a spring 43, but is maintained in the closed position by the weight of the contactor armature 13 and crosshead 15 when the latter is in its "open" position. The carrier is mounted on a rod 27 provided with a "shock spring" 63 and a "loading spring" 67, the latter being less stiff than the shock spring so that it fully compresses, whilst the shock spring remains only partly compressed when the contacts are closed. A slidable plate between these two springs enables them to act together on the carrier to prevent contact bounce under mechanical shock conditions. If there should, however, be momentary parting of contacts the additional spring blade contacts 55, 57 maintain the closed-circuit condition.
Patent GB-296510-A (GB)
Title: Improvements in apparatus for cleaning casings or containers
IPC: F16N33/00
Filed: 1927-06-29
Abstract: 296,510. Deutsch, L., and Pfeifer, F. A. June 29, 1927. Gear-boxes, cleaning. - Apparatus for cleaning containers, particularly transmission casings of motor vehicles, comprises a tank 1 for cleaning liquid, a pump carrier by the tank, a conduit 15 for conveying liquid to the casing being cleaned, a conduit 20 for removing liquid from the casing and a strainer 23 for separating solid matter or heavy oils from the liquid, which is used repeatedly. The pump 5, shown as a rotary pump, is driven through bevel gearing from an electric motor 13 and is supported by a discharge conduit 4 secured to a base plate 3 forming a cover for the tank 1. The conduit 4 is connected to the flexible hose 15, which is provided with a valvecontrolled nozzle 16 for insertion in the casing being cleaned. The conduit is also connected to an injector 17 provided with an inlet 18 through which liquid is discharged to create suction in the flexible hose 20. Liquid is thereby withdrawn from the casing and discharged through a pipe 21 against the strainer 23, which is kept clear of solid matter or heavy oils by the force of the jet. Liquid from the tank can enter the pump through the inlet port 14 only by way of the strainer 23, so that before being used again it is partly filtered.
Patent GB-1424228-A (GB)
Title: Earth leakage proteciton circuit
IPC: H02H3/33
Filed: 1973-04-11
Abstract: 1424228 Protective arrangements TEXAS INSTRUMENTS Ltd 11 April 1973 17331/73 H2K An earth-leakage protective arrangement for an A.C. mains supply comprises a circuitbreaker BS1, BS2 having a winding BL in series with a semi-conductor trigger device, e.g. a triac S2, across the mains supply, which trigger device may be rendered conductive in response to both positive and negative half cycles of the voltage induced in the secondary winding L3 of a core-balance transformer T when the voltage in this secondary winding exceeds a threshold value. As shown, the ends of the centre tapped secondary winding L3 are connected through diodes D1, D2 to the gate of a thyristor S1. This thyristor S1 connects the gate of the triac S2 to the junction between a diode D3 and a Zener diode Z when rendered conductive on the occurrence of an earth leakage. A capacitor C ensures that a triggering voltage is always available for the triac S2. In a modified arrangement, the diodes D1, D2 are replaced by Zener diodes and capacitors connected across the two halves of the secondary winding and two thyristors are used, Fig. 2 (not shown).
Patent GB-327338-A (GB)
Title: Improvements in tuning coils for wireless receivers
IPC: H01F27/00
Filed: 1929-06-07
Abstract: 327,338. Jensen, T. M. W. June 7, 1929. No Patent granted (Sealing fee not paid). Inductances.-A variable inductance comprises an annular metal core of T-shape crosssection wound with insulated copper wire, bearings being mounted in the centre of the core and carrying a rotatable contact roller, the roller engaging the rim of the winding which is bared. In one construction, Fig. 2, the winding 3 is carried on the metal core 1 and the contact roller 17 is operated from a distance by a rod 26 through bevel gearing 22, 23 carried on brackets 4, or the roller contact may be adjusted by a handle mounted upon it. The coil is enclosed in a peripheral insulating strip which may be inscribed with station names and wavelengths. In another construction for neutrodyne and similar circuits, two roller contacts are operated by differential bevel gearing.
Patent GB-943559-A (GB)
Title: Apparatus for visually inspecting strip travelling at high speed
IPC: H04N7/18
Filed: 1961-05-15
Abstract: 943,559. Television. UNITED STATES STEEL CORPORATION. May 15, 1961 [May 16, 1960], No. 17610/61. Heading H4F. Visual inspection of a metal strip 1 (Fig. 1), moving at high speed through a processing station (to detect flaws &c.) is effected by illuminating the strip momentarily by lamp 5 during the frame retrace period of a television camera 6 which is focused on a selected area of the strip and the image signals derived from which are reproduced as a picture on a viewing tube (not shown). Two lamps 5 (Figs. 2, 3) are preferably employed the light from which is directed against a diffusely reflecting screen 8 provided with a non-reflective area 11 the area under which on the strip is " viewed " by the camera 6 so that when the strip is highly reflecting the only light which reaches the camera is that due to surface imperfection &c. When the strip is not highly reflecting it may be illuminated directly (Fig. 4, not shown). The control circuit for the lamps 5 is conditioned (via the synchronizing signals of the system) so that flashing (of a duration of about 30 microseconds) occurs during frame retrace periods (1) when a manually controlled switch is operated; (2) at periodic intervals controlled by a frame pulse counting circuit; and (3) at spaced positions along the length of the strip controlled by counting pulses generated by a pulse type tachometer operated by the mechanism moving the strip operation in modes (2) or (3) being selectively determined by manual switch means (Fig. 7, not shown).
Patent GB-184154-A (GB)
Title: Electromagnetic vibrators, telephones or the like
IPC: H04R13/02
Filed: 1922-06-27
Abstract: 184,154. Signal Ges. Aug. 1, 1921, [Convention date]. Electromagnets. - A field magnet for use in a telephone receiver, &c. is designed so that the energy losses in the iron and in the copper coils and the vibrating mass of the armature are all reduced, the iron and copper losses being m a d e substantially equal. The figure shows such a design of magnet and armature for use in a telephone receiver. In order to reduce the iron losses, the magnet consists of U-shaped paramagnetic laminµ which provide a common metallic path both for the continuous flux of the permanent field and forthe alternating flux produced by the current in the coils. The laminµ are of magnetizable steel or of soft sheet-iron according as the receiver is of the permanent-magnet or the electromagnetic type. The vibrating mass is reduced by inserting the laminated armature in an aperture in the receiver diaphragm, the thickness h of the armature being preferably about one-fifth of the thickness a of the magnet limbs. In order to reduce the copper losses until they are equal to the iron losses, the magnet is made substantially cubical in shape, the thickness a of the limbs being about one-quarter of the length l of each edge of the cube. The coils are then wound on to the magnet until the interior space between the limbs is filled.
Patent GB-1245569-A (GB)
Title: Improvements in or relating to headboxes for paper-making machines
IPC: D21F1/02
Filed: 1970-04-14
Abstract: 1,245,569. Headboxes for papermaking machines. A. AHLSTROM OSAKEYHTIO. 14 April, 1970 [15 April, 1969], No. 17707/70. Heading D2A. [Also in Division G1] A headbox for a papermaking machine has a vertically and horizontally adjustable front wall including an angle α, which is less than 90, with the bottom wall, and having a mixing roll between these two walls so arranged that the roll maintains its spacing from the front and bottom walls when the front wall is displaced. When the front wall is displaced parallel to the bottom plate, the roll is arranged to be displaced by the same distance. When the front wall is displaced by a distance "a" perpendicular to the bottom wall, the roll is arranged to be displaced through a distance a/tan α- Mechanical, hydraulic and electrical means for achieving this are described.
Patent GB-1135429-A (GB)
Title: An expansible container for tea leaves and similar infusible matter
IPC: B65D81/00
Filed: 1966-04-22
Abstract: 1,135,429. Making infusion bags. A. ROMAGNOLI. 22 April, 1966, No. 17742/66. Heading B5D. [Also in Division B8] An expansible infusion bag is formed without the use of sealing adhesives or other means of sealing, by folding a single sheet into a U-shape about a block 16; flaps 4, 5 are then folded down along lines 6, 7, forming an end flap 8 which is folded along line 9, flaps 4, 5 are then folded upwardly along line (7), Fig. 3, the borders (10), Fig. 5, of flaps (5) being further folded over the top of the block. By means of grooves 17 in the block 16, the side walls, and bottom, of the bag are gussetted, Fig. 5. The open end of the bag is closed by folding over the bag corners adjacent the opening to form a triangular flap which is then folded and stapled, Fig. 8. In an alternative embodiment, Fig. 9, after folding down flaps (4), (5), flap (5) is folded back upon itself to enclose the end of flap (4), and the flaps are then folded up against the bag side wall.
Patent GB-1423167-A (GB)
Title: Method of binding ceramic fibres and articles made from  ceramic fibres
IPC: C04B35/63
Filed: 1972-04-18
Abstract: 1423167 Laminates ZIRCONAL PROCESSES Ltd 18 April 1973 [18 April 1972] 17892/72 Heading B5N [Also in Divisions C3 and D1-D2] A laminate comprises two layers or articles of ceramic fibre material bonded together with a binder comprising a silica aquasol thickened with an evenly dispersed natural or synthetic clay in which the silica in the aquasol is gelled to set the binder. One or more finely divided refractory materials, e.g. sillimanite, mullite, alumina or a commercial alumino-silicate, may be added to the binder. The ceramic fibre may be mineral wool.
Patent GB-1108079-A (GB)
Title: Improvements in or relating to compressed air or gas operated weapons
IPC: F41B11/721
Filed: 1966-04-25
Abstract: 1,108,079. Trigger mechanism. ZAVODY JANA SVERMY NARODNI PODNIK. 25 April, 1966 [26 April, 1965], No. 17893/66. Heading F3C. A trigger mechanism for a semi-automatic weapon, e.g. a compressed gas weapon, comprises a trigger 5 pivoted about a bolt 6 mounted in the body of the weapon and having rigidly connected at its upper end a double armed lever 7 spring loaded for anti-clockwise movement. A trigger lever 13 and a retaining lever 16 are both pivoted about a second bolt 15 and each has a catch 24, 25 for co-operation with an extension 14 of a slidably mounted, spring loaded plunger 18. One arm of the retaining lever 16 is spring biased against an arm of the double armed lever 7. On actuation of the trigger the plunger, held by the trigger lever catch 24 through the mechanical connection between the double-armed lever and the trigger lever, is released to release compressed gas for firing a projectile, the gas pressure returning the plunger to the left where it is engaged by the retaining lever catch 25 which is urged upwardly by the spring biasing. On return of the trigger the catch 25 is urged away from the plunger and the trigger lever catch 24 is urged into the path of the plunger extension by its mechanical connection to the double-armed trigger lever 7. The retaining lever catch is further removed from the second bolt than the trigger lever catch and thus the plunger moves forwardly before its extension engages the trigger lever catch.
Patent GB-1320422-A (GB)
Title: Locking device for the door of a washing machine
IPC: D06F37/42
Filed: 1971-05-28
Abstract: 1320422 Locks INDUSTRIE A ZANUSSI SpA 28 May 1971 [5 June 1970] 18006/71 Heading E2A A locking device for the door of a washing machine comprises a latching member, a hook 12, which has a step 31, which engages an edge 32 of the machine in one position and in a second position is retained by a second step 33 engaging a locking member, an edge portion 34 of a plate 13, the locking member being released with delayed action by displacing the latching member from the one position to the second position, the latching member in the second position opening a switch 29 controlling the power supply to an electric motor. The plate 13 supports a cup 16 which is urged by a spring 17 away from a second cup 22 mounted on a tube 20 having a frusto conical' opening closable by a cylindrical valve 23 on a stem 24 adjustable by a screw threaded plug 25 to adjust the volume of air within the tube which has a side opening 28. When the spring urged hook 12 enters apertures in the machine and in the plate 13 it depresses the plate 13 and causes the cup parts 16, 22 to be compressed air being therefore vented through the opening 28. When the hook is displaced upwardly to disengage the machine it abuts the edge portion 34 of the locking plate 13 and is retained thereby and it removes pressure from the cup 16 which is urged upwardly by the spring 17 thus drawing in air between the cups, until they separate moving the plate 13 upwardly and releasing the hook. The switch 29 is actuated by a pivoted lever, one end of which is moved by the hook when in latching position. As the hook is withdrawn the lever pivots to open the switch. The time delay in releasing the hook can be varied by adjusting the setting of the valve 23 by the plug 25 so that it is longer than the time taken by the machine drum to change from the centrifuging speed to the washing speed.
Patent GB-1002717-A (GB)
Title: Unsaturated polyesters and addition copolymers thereof
IPC: C08G63/52
Filed: 1964-04-30
Abstract: A polyester containing fumaric acid units is produced by condensing maleic acid or an ester-forming derivative thereof with a polyhydric alcohol in the presence of a secondary amine in which the amino group forms part of a ring. Ester forming derivatives specified are maleic anhydride and methyl and ethyl maleates. Polyhydric alcohols specified are: mono-, di-and triethylene glycols, propylene, neopentylene, butylene, pentylene and hexylene glycols, propane-1,2-diol, butane-1,3-diol, glycerol, trimethylol propane and pentaerythritol.  Amines specified are piperidine and its 2-methyl-, 3-methyl-, 4-methyl and 2,6-dimethyl derivatives, tetrahydroquinoline, tetrahydroisoquinoline, decahydroquinoline and tetrahydroquinaldine. Esterification may be at 150-210 DEG  C., the reactants being molten or in a solvent, e.g. xylene.  Up to 50% of the maleic acid may be replaced by chloromaleic, itaconic or citraconic acid and aromatic and saturated aliphatic mono-and/or polycarboxylic acids may be present. Such acids specified are: benzoic, succinic, adipic, sebacic, phthalic, isophthalic, terephthalic, tetrahydrophthalic, trimellitic, tricarballylic, pyromellitic, tetrachlorophthalic and hexachloroendomethylene tetrahydrophthalic acid.  A tribasic acid or a trial may be used in conjunction with a monobasic acid or alcohol.  The product may be copolymerized with styrene, vinyl toluene, diallyl phthalate, triallyl cyanurate, acrylamide or butyl methacrylate and/or used to make shaped bodies or surface films.  In Example (15) hydroquinone is present during polyesterification.
Patent GB-730974-A (GB)
Title: Improvements in and relating to wired broadcasting systems
Inventor: PEACOCK JOHN HERBERT
IPC: H04H20/81
Filed: 1952-07-17
Abstract: 730,974. Distributing music &c. COMMUNICATIONS PATENTS, Ltd. Oct. 16, 1953 [July 17, 1952], No. 18115/62. Class 40 (4). In a wired broadcasting system for the simultaneous distribution over a two-wire main feeder of both high and low-frequency signals such as television programmes and music, the main feeder 3 is connected to branch feeders 7, 9, 10 over a shunt circuit comprising an inductor having two windings 4 connected in series by a condenser 5, those branch feeders 9, 10 pertaining to low-frequencies only being connected across the condenser while the branch feeders 7 requiring both high and lowfrequency signals are connected to taps 6 on the inductor windings. The' inductor thus constitutes an auto transformer which matches the impedances of the main and branch feeders 3, 7. A predetermined degree of signal attenuation is effected by resistors 8. The shunt circuit may be incorporated in a junction box, Fig. 2 (not shown). Specifications 412,611 and 516,500 are referred to.
Patent GB-528029-A (GB)
Title: Improvements in or relating to method of manufacturing lock nuts
IPC: B21K1/70
Filed: 1939-06-22
Abstract: 528,029. Locking nuts. DILL MANUFACTURING CO. June 22. 1939, No. 18214. Convention. date, July 1, 1938. [Class 89 (i)] [Also in Group XXII] A lock nut comprises a body having a threaded hole therethrough, and a metal disc secured to the nut also with a threaded hole therethrough, the threads in the disc being of the same pitch and axial alignment as the threads in the nut but slightly out of lead therewith. The nut is provided with a body portion 1, a central hole 2 and an upstanding flange 3. The top of hole 2 has a chamfer 4 leading a ledge 5 adjacent to the lower end of flange 3. The disc 6 may be made of bronze or other metal. It is secured against movement relative to the nut body by turning over the flange 3 to engage the washer. The hole 2 in the nut body 1, and the hole 7 in the disc 6 are then tapped, and the disc is slightly dished so that the disc threads are slightly out of lead with those in the nut body.
Patent GB-354003-A (GB)
Title: Improvements in fluid pressure gauges
IPC: G01L19/08
Filed: 1930-06-14
Abstract: 354,003. Pressure gauges. TRAFFORD, F., 10, Lockhead Avenue, Denny, Stirlingshire. June 14, 1930, No. 18256. [Class 106 (ii).] Comprises a gauge for use with steam pressures in which a revolving pointer in its normal working makes a number of complete revolutions, the direction of rotation denoting " rise " or " fall " of pressure and the rate of change of pressure being judged by the rate of movement of the pointer. The element of the gauge moved by the pressure fluid, for instance the end of a Bourdon tube, actuates a quadrant 3 which through multiplying gears 5, 9, 12, 14, 15, 17, 19 actuates a pointer 21. Slack in the gearing is taken up by a balance weight 22 hanging from a cord passed around and secured to a small drum 18 on the spindle 16. The gear wheel 5 is attached to a disc 7 a pin 8 on which engages an arcuate slot 10 in the wheel 9 which itself has a pin 11 adapted to engage a stop formed by a cut-away part of the casing. In use, the quadrant 3 moves in a counterclockwise direction, Fig. 4, and the pin 8 moves idly in the slot in the wheel 9 until at a predetermined value below the working pressure it engages the upper end of the slot when the wheel 9 and the multiplying train is driven. If pressure falls, the rack moves clockwise and the weight 22 drives the train in the opposite direction until the pin 11 engages its stops. Upon further reduction of pressure, the pin 8 moves in its slot, if necessary back to zero. The pins 8, 11 may be adjusted into any of a series of holes to bring the pointer into operation earlier or later as required.