baber/WOPTO huggingface dataset:
Patent GB-1495982-A (GB)
Title: Pulse firing circuits
IPC: H03K3/57
Filed: 1975-03-03
Abstract: 1495982 Control of D.C. motors LANSING BAGNALL Ltd 3 March 1975 [19 Feb 1974] 7408/74 Heading H2J A pulse firing circuit comprises two electronic switches each having a main current path and a control gate, an output connection for each switch, a charge storage circuit for storing charge in response to input signals and having a part connected to discharge through the main path of either switch when closed to produce an output pulse at the respective output connection, a respective timing circuit for each switch, the timing circuits being connected in parallel with the charge storage circuit and connected to the respective control gates to close the switches only after respective periods which are of different duration from each other, and are substantially longer than the time constant of the charge storage circuit, and means for selectively inhibiting the closing of the switch associated with the timing circuit of lesser timing period. In the described embodiment, the charge storage circuit comprises capacitors 2, 3 and resistor 4 connected across lines 1, 2 which are fed with a square-wave input from an inverter, multivibrator or oscillator and which are also connected to timing circuits 12, 13 and 15, 16 respectively controlling electronic switches 5, 6 in the form of programmable unijunction transistors (as shown), triacs or controllable rectifiers. Both timing circuits have a time constant substantially greater than that of the circuit 2, 3, 4, so that when the switch 5 or 6 is fired by its timing circuit, the capacitor 3 discharges through the conductive switch to produce an output pulse at terminal 9 or 10, the capacitor 2 providing a reverse bias to ensure turn-off of the switches 5, 6 after the discharge through one of them. The pulses from terminals 9, 10 may be used to fire respective thyristors (not shown) of a control circuit for the armature or field winding of a D.C. motor. The inductor 16 forms a saturable reactor whose flux may be controlled by a movable magnet and/or a winding sensing the motor current. Members 15, 16 are chosen so that their time constant is less than that of the circuit 12, 13, and are connected to a passive integrator 17, 18 controlling a transistor 19, the members 15 ... 19 forming the control circuit which is the subject of Specification 1,495,981. Thus the switch 6 is fired in preference to switch 5 until the motor current increases to saturate the reactor 16, whereupon switch 6 is inhibited and switch 5 is fired after its time delay. Terminals 10 and 9 respectively control the main and commutating thyristor in the motor control circuit.
Patent GB-528902-A (GB)
Title: Improvements in grinding or abrading machines
IPC: B24B5/02
Filed: 1939-03-08
Abstract: 528,902. Grinding screw-threads. COVENTRY GAUGE & TOOL CO., Ltd., and HARLEY, S. J. March 8, 1939, Nos. 7479 and 7480. [Class 60] [Also in Group XXII] Screw threads are ground either by the plunge cut method or by generation in a machine that employs a number of grinding- wheels acting on bar stock fed step by step through one or a number of rotary work spindles. Bar stock a is fed step by step by means associated with a hollow spindle band is ground by a wheel c on a slide d and the finished part is dressed by a wheel f. The first wheel may grind to diameter and the second wheel may form-grind, or one wheel may rough grind and the other finish grind the thread. In these cases a separate parting- tool is employed. In the machine shown in Fig. 2 four spindles are mounted in a turret. One grinding-operation takes place at a, a stock feed at a<SP>1</SP>, a second grinding operation at a<SP>2</SP>, and parting off at a<SP>3</SP>. The turret may carry eight spindles two being acted on simultaneously at each grinding station by a common wheel, stock being fed in two spindles simultaneously and the parting-tool being duplicated. A separate grinding-operation may be carried out on each spindle a, Fig. 4, the upper wheels c being carried by slides 1<SP>1</SP> superposed on the slides I for the lower wheels. A parting-tool, not shown, may sever the article on the completion of the four grinding operations, or one of the wheels may be used for severing after three operations. When only two grinding operations are required an additional parting- tool is provided and the articles are completed during each revolution of the turret. In a further modification four spindles carried by slides arranged as the wheel slides in Fig. 4 carry work acted on simultaneously by a single centrally arranged wheel. The wheels may be spaced apart on the same axis to produce the same or different diameters and forms. Additional tools may be incorporated to perform other operations before, during, or after the grinding operations.
Patent GB-391582-A (GB)
Title: Improvements in and relating to cement concretes
IPC: C04B24/36
Filed: 1932-03-14
Abstract: A stable, non-segregating concrete mix is made by adding to the mixture of aggregate, cement, and water, a relatively minute quantity of an emulsifying agent insufficient to form a stable froth in the mix.  Examples of suitable emulsifying agents are flotation agents as used in ore concentration, phosphorus compounds such as phospho-cresylic acid, soaps, e.g. coconut oil soap, and coal tar products, such as cresylic acid, of which the lighter and heavier fractions have been controlled, e.g. a product containing 40 per cent of the lighter coal tar fractions coming off below 360 DEG  C. and 60 per cent of the heavier fraction coming off above 360 DEG  C.  An alkali, e.g. sodium silicate (e.g. about 4 per cent) may be added to the emulsifying agent, e.g. the coal tar product, which is preferably made into an emulsion with about 10 per cent of water.  About one pound of this emulsion is added to a cubic yard of concrete. According to the amount of emulsifying agent used, a workable concrete can be made using from 15 to 20 per cent less water than is usual.
Patent GB-631891-A (GB)
Title: Improvements in and relating to electric toasters
IPC: A47J37/08
Filed: 1947-03-18
Abstract: 631,891. Electric toasters. SCHAPIRO, H. March 18, 1947, No. 7499. [Class 39(iii)] [Also in Groups VI and XXXVII] In an electric toaster having two oppositely-arranged and pivoted doors 20 each capable of supporting an article B to be toasted, the weight of the said article is sufficient upon the closing of its respective door to actuate a push-button micro-switch 31 through the medium of pivoted levers 36 and 37 and so energize a central heating element C. Under the weight of the load, the levers 36 and 37 disposed on either side of the heating element bear against protective grid bars 42 adjacent to the heating element. Any known type of timing mechanism may be incorporated in the toaster and the pivoted levers may control separate heating means. U.S.A. Specification 2,114,000 is referred to.
Patent GB-972848-A (GB)
Title: A darts game
IPC: A63B63/00
Filed: 1962-02-27
Abstract: 972,848. Games apparatus. G. J. MASON. Feb. 15, 1963 [Feb. 27, 1962], No. 7544/62. Heading A6H. A target for use in a game played with darts having rubber ferrules fitted over their pointed ends, comprises an array of balls 27, 29, each pivotally mounted on a support so as to be displaced from an in-play to an out-of-play position upon being hit by a dart. The target is in the form of a hollow frame 18, 19, 21, the front consisting of a series of uprights 14 supporting brackets 22 on which the target balls are pivotally mounted, the latter preferably being coloured to correspond with a set of snooker balls. Cords 34 are provided for returning hit balls to their in-play positions, and a pocket 37 at the base of the frame serves to collect spent darts.
Patent GB-1218607-A (GB)
Title: Navigation station identification
Inventor: RICHARDSON DONALD WILFRED
IPC: G01S19/25
Filed: 1968-02-15
Abstract: 1,218,607. Radio navigation. HUGHES AIRCRAFT CO. 15 Feb., 1968 [27 March, 1967], No. 7563/68. Heading H4D. In a position finding system, identifying data of radio navigational aid stations is stored, identifying data from one station is received, and the received data is compared with the stored data until a match is found. General, Fig. 1.-An aircraft 12 carries sensors 20 and a digital computer 18, the radio aid stations e.g. 16 are identified by digitized frequency #i and an air traffic control centre 14 receives reports from the aircraft and issues commands &c. thereto. In computer 18 dead reckoning latitude # dr  and longitude Á dr  are continuously determined; after every nth dead reckoning cycle the dead reckoning position data is corrected (##, #Á) utilizing latitude # st  and longitude Ást data relative to station 16. Calculated navigational information is fed to a display 22, the aircraft's position relative to a display map being always indicated. An automatic pilot may be controlled. Before measured VORTAC information can be utilized identification is established by a digital circuit.
Patent GB-108166-A (GB)
Title: Improvements in or relating to Gun Sight and Means for Illuminating them.
Inventor: ERWOOD CHARLES OAKLEY
IPC: F41G1/34
Filed: 1916-05-27
Abstract: 108,166. Erwood, C. O., and Prockter, H. J. May 27, 1916. Sights.-Relates to lamps for illuminating foresights and to backsights for use with such illuminated foresights, and consists (1) in disposing the lamp in a casing fixed at the side of the barrel and formed with a tubular cavity or passage inclined upwardly and transversely to direct a pencil of light on to the foresight and (2) of a large open-V backsight g, Fig. 6, placed farther back than the usual backsight. Fig. 1 is a sectional plan and Fig. 2 a sectional elevation of a lamp casing adapted to be secured to a rifle barrel. The inclined passage d is closed by a rotary plug e having an eccentric pin hole f so that the position of the spot of light can be adjusted.
Patent GB-577253-A (GB)
Title: Tuyeres
IPC: F27B1/16
Filed: 1944-04-25
Abstract: 577,253. Tuyeres. REECE, H. A. April 25, 1944, No. 7689. [Class 51 (i)] Tuyeres for cupolas and the like comprising a bottom plate 16, end plates 17 and removable top plate 18 are provided with means for controlling the supply of air from the wind box to the furnace consisting of pivoted vanes 22, 23 extending into the tuyere and serving to regulate the size of the inlet to the tuyere without materially affecting the size of the outlet. The vanes are pivoted at 25 and co-operate with plates 19 in the tuyere opening to provide two diverging air passages the inlets of which are adjustable. One means for adjusting the vanes consists of a Y-shape rod 36 engaging with rings 35 on the ends of the vanes. By raising and lowering the rod 36 the vanes are opened or closed. The rod 36 is provided with an indicator 39 having notches for receiving a pointer 40. The vanes may be operated by a rotary slotted cam or by levers.
Patent GB-589706-A (GB)
Title: Improvements relating to shaft glands for steam and gas turbines working at high temperatures
IPC: F16J15/16
Filed: 1945-03-27
Abstract: 589,706. Stuffing-boxes. ESCHER WYSS MASCHINENFABRIKEN AKT.-GES. March 27, 1945, No. 7699. Convention date, March 28, 1944. [Class 122 (v)] A shaft gland 4 for steam and gas turbines is cooled by part of the working medium which is extracted at the point 6 from a space 19 lying behind the first expansion stage 1, looking in the direction of flow, then passed through a cooling device 8 in a vaporous state to a point 11, lying between the ends of the gland 4, from whence some of the working medium is discharged to a point 16 and so to a point behind the second guide-wheel 3. The working medium serving to cool the gland is derived from a point lying behind a regulating device which determines the amount of working fluid passing through the turbine.
Patent GB-1449329-A (GB)
Title: Device for removing or reducing unbalanced inertia force of a  reciprocating internal combustion engine
IPC: F16F15/26
Filed: 1974-02-20
Abstract: 1449329 Balancing NISSAN MOTOR CO Ltd 20 Feb 1974 [24 Feb 1973] 7748/74 Heading F1M A balancing device for removing or reducing unbalanced inertia forces of a reciprocating internal combustion engine consists of two sets of balancing assemblies provided at the front and rear ends of the engine crank-shaft 1 respectively, each assembly comprising a cam member 5 coaxially mounted on the crank-shaft 1 the cam member forming therein a cam groove 7 around and spaced from the crank-shaft a balancing mass member 8 arranged to move reciprocatingly along an axis perpendicular to the axis of the crank-shaft and a cam follower 12 connected to the mass member such that the mass member is reciprocatingly driven by the rotational movement of the cam member, the mass of the balancing mass member and profile of the cam groove being determined such that the reciprocating movement of the balancing mass member provides an inertia force substantially equal in magnitude but opposite in direction to half the unbalanced inertia force of the engine, the balancing mass members of the two assemblies being arranged to reciprocate in the same direction. When the crank-shaft is in the 0 degrees or 180 degrees position the balancing mass member 8 is in its lowermost position and when the crank-shaft is in the 90 degrees or 270 degrees position the balancing mass member 8 is in its uppermost position.
Patent GB-960007-A (GB)
Title: Improvements in or relating to powders for extinguishing fires
Inventor: HALL HARRY THOMAS
IPC: A62D1/00
Filed: 1961-03-02
Abstract: A fire-extinguishing powder which will fuse and form an impervious frit in contact with burning uranium, plutonium or thorium comprises a mixture of salts selected from the group consisting of the fluorides of the alkali metals and calcium which mixture has been fused together and ground to a powder having a melting point below 640 DEG  C.  The powder is dehydrated and is preferably kept dry by the addition of up to 5% by weight of a drying agent such as a metallic soap.  The powder is preferably used by disposing a quantity thereof within the sealed working space wherein the uranium, plutonium or thorium is handled, the powder being discharged on to the site by ejector equipment operated by remote control, discharge being under pressure or by gravity.  Several examples are given using fluorides of sodium, potassium, calcium or lithium, and of rubidium or caesium.
Patent GB-653336-A (GB)
Title: Devices for securing wall and ceiling boards to building frameworks
IPC: E04B9/24
Filed: 1948-03-15
Abstract: 653,336. Clips. CARTWRIGHT, H. N., DAVIES, J. G., and PATTERSON, R. H. March 15, 1948, No. 7776. [Class 44] [Also in Group X] A device for securing wall and ceiling boards to flanged rails having wide bottom flanges and narrow top flanges comprises a spring clip having tongues which enter the boards. In the form shown in Figs. 1 and 2, a U-shaped clip 6 has tongues 7, 8- which enter the board 9, and a tongue 10, cut-out and pressed-up from one limb of the clip, which engages behind a depending flange 4 of the rail 1. In another form, Figs. 4 and 5, the clip 14 straddles the top of the rail, with two depending parts 18 engaged under the top flanges, and spring arms 17 pressing into the boards 15, 16.
Patent GB-828891-A (GB)
Title: Process for prodcuing phosphatic fertilizers
IPC: C05B11/04
Filed: 1956-03-13
Abstract: A phosphate fertilizer is made by mixing an inorganic fertilizer material consisting of phosphate rock, dolomite, or limestone with the metaphosphate of calcium, sodium, or potassium, and treating the mixture with a mineral acid (sulphuric, nitric, hydrochloric, or phosphoric acid) in the presence of sufficient water to effect hydrolysis of the metaphosphate.  The use of sulphuric acid with calcium metaphosphate is excluded.  Hydrolysis and acidulation proceed concurrently, and the proportion of phosphate rock, dolomite, &c. is sufficient to neutralize the acid.  In examples, approximately equal quantities of the meta-phosphate, phosphate rock, and acid are mixed together with a small amount of water to form a thick slurry, which is then delivered to a rotary drier at 150 DEG  to 300 DEG  F. After curing, a dry crumbly solid is formed.  This may be ammoniated, using ammonia, or ammonium salts or urea/ammonium hydroxide solution followed by agitation until a dry granular product is obtained.  The initial reactants may be treated with a small amount of a non-ionic surfaceacting agent, e.g. the condensation products of ethylene oxide with higher alcohols, alkyl phenols or mercaptans.  Specification 828,892 is referred to.
Patent GB-471752-A (GB)
Title: A process for the manufacture of non-glled tremeparemt pressed articles and materials
IPC: B23B5/40
Filed: 1937-03-09
Abstract: Mixtures of a phenol-aldehyde condensation product, hexamethylenetetramine and a low-boiling solvent therefor such as water are heated, with or without the addition of plasticizers or fluxing agents but without elimination of the solvent, in a mixer or on rolls at temperatures below 100 DEG C. until the boundary of the rubber-like state is reached and the material is prehardened to a considerable degree, and the resinous product obtained is moulded by the action of heat and pressure to obtain transparent articles.
Patent GB-782592-A (GB)
Title: Improvements relating to straight-bar knitting machines
IPC: D04B11/00
Filed: 1955-03-18
Abstract: 782,592. Knitting-machines. MONK (SUTTON IN ASHFIELD), Ltd., S. A., and MONK, S. A. May 31, 1956 [March 18, 1955], No. 7891/55. Class 74 (2). To enable the fashioning mechanism to be returned to its starting position after completion of fashioning of a garment on a straight-bar machine, the bluffing discs 22 controlling the automatically operated pawl and ratchet mechanism, and the fashioning screws 10 are each coupled to individual control shafts 26 and 11 which are disposed longitudinally of the machine to be coupled by linkage 27 ... 30 and a shaft 18 respectively to a hand-operated lever 31 and handle 19. The discs 22 are coupled to thin shafts 26 by links 24 and the screws 10 are coupled to their shafts 11 by chain-drive mechanism 12. The lever 31 and handle 19 are disposed at a convenient point at the front of the machine, whereby an operative can bluff the pawl and ratchet mechanism and manually reposition' the fashioning mechanism. In addition a pedal 41 simultaneously withdraws the plunger 33 locating the fashioning screw. To avoid the turning of the fashioning screws to move the nuts controlling the points for forming a V-neck in and out, the point-bar is attached to its nut by a spring-biased lever 47 which is withdrawn from engagement with the bar by operation of pedal 41 and permits the manual displacement of the points to an inoperative position. Simultaneously the carrier stop 65 is withdrawn fiom its operative position to permit the carrier for one side of the V-neck to be moved to an inoperative position.
Patent GB-1513961-A (GB)
Title: 6,7-benzomorphans method for their preparation and intermediates
IPC: F16D43/20
Filed: 1975-02-25
Abstract: 1513961 6,7-Benzomorphans A C F CHEMIEFARMA NV 4 Feb 1976 [25 Feb 1975] 7891/75 Heading C2C Novel compounds of Formula I wherein each R is a lower alkyl group; R 1  is a hydrogen atom, or an alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkylalkyl, cycloalkenylalkyl, cycloalkylidenalkyl, aralkyl, heteroarylalkyl or heterocycloalkylalkyl group; R 2  is a hydrogen atom or a hydroxy, alkoxy, alkoxyalkoxy or acyloxy group; the pharmaceutically acceptable salts thereof; and the optical isomers are prepared by cyclization of an amino-tetrahydronaphthalene derivative. Starting materials and intermediates therefor are also prepared. Pharmaceutical compositions in conventional forms and having analgesic activity comprise an above novel compound and a carrier or diluent.
Patent GB-565436-A (GB)
Title: Improvements in or relating to hair nets
IPC: A45D8/40
Filed: 1943-05-18
Abstract: 565,436. Hair nets. BEDWELL, R. G. May 18, 1943, No. 7904. [Class 131] A hair net comprises a strip of meshed material cut from a continuous web and gathered at opposed edges by small elastic loops c which assist the expansion or contraction of the net and ensure that it will accommodate itself exactly to the head of the wearer. The ungathered edges b of the net are of smaller mesh than the remainder.
Patent GB-231495-A (GB)
Title: Improvements in amphibious aeroplanes
IPC: B64C35/00
Filed: 1925-03-24
Abstract: 231,495. Schreck, L. March 25, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Spring wheels with continuous outer rigid ring and rubber-ring and like hubs and cushions. -The wheels 5 of an aircraft may have balloon tyres, or shock may be absorbed by resilient washers 43 placed between inner and outer rings 41, 42, a guide flange 44 on the ring 41, working between flanges 45 on the ring 42.
Patent GB-191989-A (GB)
Title: Improvements in windows for motor vehicles
IPC: B60J1/14
Filed: 1922-03-18
Abstract: 191,989. Hillman Motor Car Co., Ltd., and Green, E. A. March 18, 1922. Wind and like screens. - The forward side window F of a motor vehicle having a collapsable ho o d is hinged to brackets B<2> on the pillars of the front screen and can open and close with the door and act as a side screen when the hood is collapsed. A link or stay H is provided to hold the window open for signalling to traffic &c. The rear window E is held by a suitable fastening in a felt-lined groove C<2> in the hood pillar and has a guard plate E<2> engaging a resilient inset in the fence rail. The rear window is preferably carried in an L-shaped frame J, when the hood is collaped. The frame is pivoted to a swinging bracket L and enables the window to be used as a side or front screen.
Patent GB-768071-A (GB)
Title: Photographic developer
IPC: G03C5/30
Filed: 1955-03-18
Abstract: 1 - (p - Methylaminophenyl) - 3 - aminopyrazoline is prepared by refluxing 1-(p-N-methylacetaminophenyl) - 3 - aminopyrazoline with aqueous sodium hydroxide solution.  1-(p-Ethylaminophenyl) - 3 - aminopyrazoline, 1 - (p-aminophenyl) - 3 - aminopyrazoline, and 1 - (p - amino-m - methylphenyl) - 3 - aminopyrazoline are similarly prepared.  Specification 679,678 is referred to.
Patent GB-1497561-A (GB)
Title: Control circuit for operating a pneumatic cylinder
IPC: F01B25/02
Filed: 1975-02-26
Abstract: 1497561 Valves ATLAS COPCO AB 26 Feb 1975 [11 March 1974] 7996/75 Heading F2V A piston 22 is controlled in a cylinder 21 by a circuit in which a housing 11 is provided with passages, 25, 26 for motive pressure air, and 12 for exhaust; and contains a shiftable valve body 18 for controlling the passages; at least one of the passages being for the release of air to atmosphere and having flow resisting means 27 with a diffuser shaped outlet. By the  use of a flow restrictor as shown with a fixed flow cross-section and a critical pressure ratio exceeding 0À7 the restriction of piston speed is independent of supply pressure. Exchangeable flow restrictors with differing diffuser shapes are described with reference to Figs. 3, 4, 5 (not shown) and flow characteristics are given in Fig. 6 (not shown).
Patent GB-1380998-A (GB)
Title: Automatic central buffer couplings for railway vehicles
IPC: B61G5/08
Filed: 1972-02-22
Abstract: 1380998 Service line couplings for rail vehicles GERMANY MINISTRY OF TRANSPORT 22 Feb 1972 8095/72 Heading B7T  A service line coupling for rail vehicles comprises an air line 4 pivoted at 6 to a contact carrier 2 provided with inclined front contact faces, the coupling having pivoted thereto a locking pawl 3 which in use of the coupling engages in a recess 5<SP>1</SP> of a counter coupling with sealing elements 9, 9<SP>1</SP> in contact, bellows 1 between the air pipe 4 and carrier 2 being inflated by the air pressure to hold the couplings firmly together. In the embodiment of Fig. 5 sealing element 9 is carried by carrier 2 which is slidable in housing 2 and air bellows 1 assisted by a spring 10 extends between the air line and the carrier. A member 11 on the front face of the carrier having inclined surfaces 12 pushes sealing member 9 into the housing during a coupling operation to prevent damage thereto.