baber/WOPTO huggingface dataset:
Patent GB-1154982-A (GB)
Title: Improvements relating to Inverter Circuits
Inventor: RHODES GEORGE CROMWELL
IPC: H02M7/5383
Filed: 1967-03-07
Abstract: 1,154,982. Protective arrangements. INDUSTRIAL INSTRUMENTS Ltd. 5 Feb., 1968 [7 March, 1967], No. 10713/67. Heading H2K. [Also in Division H3] In a transistor push-pull oscillator inverter, protection against overheating is obtained by means of a thermal cut-out in the common base line. In the figure the positive supply terminal is connected through a switch 2 and fuse 3 to the common base line containing the thermal cut-out 8 and a resistor R 1 . The collectors of the two transistors TR1 and TR2 are connected across the primary winding 5 of a transformer which has feed-back windings 6, 7, for the bases. Capacitor C 1  is provided for starting purposes and C 2  as an inductive load-current path. The cut-out is situated either at the transistors' heat sink or on the output transformer. The secondary winding 9 has a centre tap which is selected using switch 11, to provide alternative output voltages for a shaver 10.
Patent GB-625482-A (GB)
Title: Improvements in or relating to mechanical servo mechanisms
IPC: G05G19/00
Filed: 1947-04-22
Abstract: 625,482. Furnace stoking apparatus. WARD, F. H. ALLMAN-, and MECHANICAL FEEDERS, Ltd. April 22, 1947, No. 10733. [Class 51 (i)] [Also in Group XXIV] A mechanical servo device with a follow-up action for an underfeed boiler stoker such as described in Specification 556,720, [Group XXX], comprises a driven member 1 in the form of a toothed quadrant fixed on a shaft 2 off-centre to the geometric centre 3 of the quadrant and adapted to be driven in either direction by a ratchet pawl 4 which is carried by a link 6 pivoted to an arm 36 oscillated by a connecting rod and crank 19, 20. The pawl is also pivoted to an arm 5 pivoted on the centre 3 of the quadrant and is controlled by a shield 7 between the pawl and the quadrant teeth fixed to an arm 8 also pivoted on the centre 3. A pin 10 on the arm 8 passes through a slot 22 in the arm 5 and is connected through links 9, 14 and 12 to a control member such as a thermostatic bellows 11. The shield 7, is sufficiently wide so that in a neutral position it shrouds the quadrant teeth over the stroke of the pawl so that no engagement between the pawl and quadrant takes place. If however the shield is moved one way or the other by the control member 11 the pawl will engage the quadrant on one side and move it in a direction opposite to the movement of the shield. This movement of the quadrant will result in a pivoting movement of the arm 8 about the pin 10 to restore the shield 7 to the neutral position shrouding the quadrant so that movement thereof ceases. Thus a movement of the quadrant 1 and shaft 2 is obtained from the driving crank 20 proportional to movement of the control device 11. In a modified arrangement the control element, the control shield and the driven quadrant are interconnected by a floating lever for giving the follow-up action. In another arrangement for effecting linear movements a reciprocating pawl co-operates with a straight rack on the driven member and a control shield is adapted to be actuated by a pinion engaging between a second set of teeth on the rack and a set of rack teeth on a linearly moving control member. Thus movement of the control rack displaces the shield and subsequent movement of the driven rack restores it to neutral position. Friction ratchet devices may be used instead of the positive toothed type. Reference has been directed by the Comptroller to Specification 626,751, [Group XXIV].
Patent GB-1063842-A (GB)
Title: Improvements in or relating to frame structures
Inventor: POTTEN LEONARD HUMPHRY
IPC: F24C15/04
Filed: 1964-03-13
Abstract: 1,063,842. Furniture joints. RADIATION Ltd. Feb. 26, 1965 [March 13, 1964], No. 10761/64. Heading A4H. [Also in Divisions E1 and F4] Extruded metal frame members 1, 2 have juxtaposed mitred ends overlapped by right-angled brackets 6, self-tapping screws 9 being inserted in apertures 8 therein to engage in longitudinal grooves 5 in the members 1, 2. A 90 degrees relation between the members 1, 2 is ensured by locating the apertures 8 so that an inner edge 10 of each bracket 6 abuts an inner wall 4 of the members. The members may be extruded from material other than metal; and the frame is particularly applied to oven doors.
Patent GB-252517-A (GB)
Title: Improvements in or relating to mooring masts or mooring gear for lighter-than-air aircraft
IPC: B64F1/14
Filed: 1925-04-20
Abstract: 252,517. Airship Guarantee Co., Ltd., and Wallis, B. N, April 20, 1925. Anchoring.-A mooring mast is provided with a cradle formed by a pair of arms 4 hinged to the rotatable masthead by a ball and socket joint or pivoted to frames 2, Fig. 2, or to a frame 8 Figs. 3, 5. The frames 2 are substantially semicircular in side elevation and are rotatable in hearings carried by cantilevers 3. The frame 8 rotates in bearings 9. In use the arms are swung inwards as shown to a position determined bv cables 5 the euds of which carry stop members which come up against spring buffers 7. At other times the frames 2 are rotated so that the arms project symmetrically from each side of the mast. The frames 2, 8 are rotated by a rack and pinion with a clutch arrangement to allow them to swing freely and, according to the Provisional Specification, a locking arrangement. With the arrangement shown in Figs. 3 - - 5 the ship is first hauled in by a bridle 11 and subsequently by cables 12 passing through fairleads at the end of the arms to winding gear 13. The ship is then made fast to the arms as bv ball and socket joints and is further lowered to the landing platform by rocking the frame 8. The hauling gear may be on the ship.
Patent GB-212147-A (GB)
Title: A new or improved adjustable holder for holding heels while securing same to the uppers of boots and shoes
IPC: A43D79/00
Filed: 1923-04-21
Abstract: 212,147. Bagshaw, J. W. April 21, 1923. Repairing.-A holder for " Louis " and like heels for facilitating attachment by repairers comprises a base b adapted to be secured to a bench and having an upstanding flange a shaped on its inner side to conform to the contour of the heel. The flange is surrounded by a frame e having a clamping block e<2> at one side and a clamping screw f at the other bearing against the rear of the flange. The parts of the holder which contact with the heel g may be faced with leather or rubber. Instead of the flange a engaging the heel directly, interchangeable members fitting differently shaped heels may be provided for insertion between the flange and the heel.
Patent GB-282703-A (GB)
Title: Improvements in or relating to machines for serving tape or other strip material
IPC: B65H35/00
Filed: 1927-04-22
Abstract: 282,703. Metal Specialties Manufacturing Co., (Assignees of Hermann, W.). Dec. 27, 1926, [Convention date]. Pivoted-blade machines.-Gummed tape D<1> is served from a supply roll by a feed-roll B<3> actuated through a ratchet-gear B<2> by a handcrank B'. The tape is severed by a V-shaped blade 39 carried on a pivoted holder E. An actuating rod E<2> is connected to a lever E<3>, with yoke 43, clamped to the hand-crank shaft B carrying also a leaf-spring B<5>. The holder E is held raised by a detent F<2> engaging the bail. During feeding of the strip the spring B<5> is flexed and at the end of the feed the actuating handle contacts with a member F<4> to trip the detent and the blade is actuated by the spring. A pad dipping into a tank moistens the tape as it passes under a guide.
Patent GB-915409-A (GB)
Title: Improvements in or relating to the making of weld elements
Inventor: KERN HENRY WILLIAM
IPC: F16B37/06
Filed: 1961-03-24
Abstract: 915,409. Forging weld nuts and bolts. HOWE, E. E. March 24, 1961, No. 10884/61. Class 83 (4). [Also in Group XXV] A polygonal fastening element 108, particularly a nut, screw or bolt, is formed with weld projections 114 on one end surface by supporting the surface whilst leaving spaced outer portions thereof unsupported and applying axial pressure to the other end surface so as to deform the element at its unsupported portions into weld projections. The lower ends of the projections may be sharp but are preferably blunted to facilitate the welding. A nut blank 108 of square or rectangular plan form is supported on a centre part 84 with the corners left unsupported. These corners are deformed into weld projections 114 by a die 96, 98. The projections abut against replaceable pins 92 of the same height. A knock-out rod may be provided in the upper die. In another embodiment, Figs. 1-5 (not shown), the projections extend outwardly from the square contour of the nut. In a further embodiment, Figs. 6-9 (not shown), the square contour is maintained by using a lower die with a square cavity.
Patent GB-985311-A (GB)
Title: Improvements in or relating to systems for controlling the speed of alternating current motors
Inventor: MARTIN LEONARD JOHN
IPC: H02P25/32
Filed: 1960-03-28
Abstract: 985,311. Automatic speed control. BRENTFORD TRANSFORMERS Ltd., and MATHER & PLATT Ltd. March 27, 1961 [March 28, 1960], No. 10888/60. Heading G3R. [Also in Division H2] The rotor windings of an induction motor M are connected to a saturable transformer 1 having a control winding 2 supplied in accordance with the slip voltage from rectifier 3,the output voltage of the rectifier being opposed by a reference voltage from rectifier 4. A second control winding 6 of the transformer compensates for variations in the rotor current due to load changes. Secondary windings of the transformer energize a mercury arc inverter 10 through rectifier 9 so that transformer 11 feeds power back to the supply. The inverter 10 is associated with a grid transformer 12, negative bias for the grids being provided by rectifier 13 connected to transformer 17.
Patent GB-1507332-A (GB)
Title: Method of lining a structure for hydraulic uses
IPC: C08K3/06
Filed: 1975-03-17
Abstract: 1507332 Bituminous coatings containing elemental sulphur SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 17 March 1975 [19 March 1974] 10931/75 Heading B2F [Also in Division C3]  A method of lining a structure for hydraulic uses comprises spreading onto the structure, substantially without compacting, a bituminous concrete or open - graded bituminous mixture comprising as the bitumen component a bitumen softer than 60/70 penetration, aggregate and elemental sulphur, the sulphur being present in a quantity by weight  less than that of the bitumen. The bitumen may be of 80/100 or 180/220 penetration grade.
Patent GB-109474-A (GB)
IPC: F02B19/14
Abstract: 109,474. Livens, F. H., and Chorlton, A. E. L. Sept. 12, 1916. Cylinders receiving liquid fuel.-Engines in which a jet of liquid fuel is injected, without the use of spraying air, into a water jacketed combustion chamber at the end of the compression stroke, are provided with means for heating the jet of fuel as it leaves the nozzle. This is done by interposing a small chamber such as c between the nozzle a and the combustion chamber b. The chamber c is heated by the hot gases which are forced into it during the compression stroke and shaped so that the liquid fuel does not impinge on its walls. The oil supply pipe may be coiled round the chamber. The atomizers may be of the type described in Specification 9382/15.
Patent GB-1411726-A (GB)
Title: Process for purifying butadiene and isoprene
IPC: C07B61/00
Filed: 1974-03-12
Abstract: 1411726 Purifying butadiene and/or isoprene INSTITUT FRANCAIS DU PETROLE 12 March 1974 [16 March 1973] 10968/74 Heading C5E Acetylenic impurities are reduced to less than 100 ppm in a feed comprising butadiene and/or isoprene by selective hydrogenation in the liquid phase at a temperature lower than 80‹ C. using a hydrogenation catalyst containing at least one non-noble metal of groups IVA to VIIA or VIII, wherein the feed also contains cyclopentadiene, e.g. in amount 1-40% by wt. The feed may be a C 5  pyrolysis cut, a mixed C 4 -C 5  pyrolysis cut or a C 4  pyrolysis cut with added cyclopentadiene. The catalyst may be used in the liquid phase, e.g. a transition metal salt reduced with a metal hydride or organometallic reducing agent, or may be supported on an inorganic carrier, e.g. SiO 2  or Al 2 O 3 . In the examples carboxylates of Fe, Ni, Co, Mo, Mn and Cr reduced with Et 3 Al or isoBu 3 Al are used in benzene solution, and iron salts are used on a SiO 2  support.
Patent GB-740105-A (GB)
Title: Improvements in or relating to centerless grinders
IPC: B24B55/02
Filed: 1954-04-14
Abstract: 740,105. Centerless grinding. CINCINNATI MILLING MACHINE CO. April 14, 1954 [May 25, 1953], No. 10985/54. Class 60 In a centerless grinder, cooling and lubricating liquid is supplied to the region bounded by the grinding wheel, the work and the work rest blade. The work rest blade 17 has its inclined upper face recessed to receive a wear resisting insert 20 which may be formed of a hard sintered carbide or ceramic material to reduce the tendency to alloy with uranium or similar type material work pieces. A coolant supply is provided through pipe 34 provided with main control valve 44. The pipe 34 extends into transverse fitting 35 carrying a coolant discharge hood or nozzle 36 the discharge through which is controlled by valve 37. The fitting 35 also carries a block 38 supporting a filter 39 retained by a cap plate 40 into which is threaded a nipple 42 connected by hose 43 with a nipple 22 threaded into the rear portion of the work rest blade 17. The blade is formed with slot 23 extending from the rear end of the blade toward the front end; at the rear end the slot is sufficiently deep to break into the drilled aperture into which the nipple 22 discharges. A closure plate 25 secured by screws 30 to the back of the blade 17 is grooved or relieved in the upper area so as to provide a narrow elongated slot 31 through which lubricant is directed against that surface of the work piece 12 which has left the grinding wheel 11 and is approaching the work rest blade. The slot 23 is stepped or tapered from rear end to front end to ensure properly balanced discharge throughout the length of the blade; vertical grooves 49 may be formed in the blade or in the inner face of the closure plate to provide supplemental jet nozzles for discharge of coolant. In a modification, Fig. 7, a discharge nozzle 45 is secured to or adjacent the work rest blade 17.
Patent GB-1210803-A (GB)
Title: Improvements in or relating to oscillators
Inventor: TIFFIN ALAN JAMES
IPC: H03L7/18
Filed: 1967-03-08
Abstract: 1,210,803. Automatic control of frequency; superheterodyne radio receivers; pulse circuits. PLESSEY CO. Ltd. 6 March, 1968 [8 March, 1967], No. 11004/67. Headings H3A, H3P and H3Q. Drift of an oscillator is reduced by applying the oscillations for predetermined times to a device which provides one or other of two outputs in accordance with the number of cycles generated in the time, which outputs cause adjustment of the frequency towards the desired value in accordance with the predominant output. In Fig. 3, the output of oscillator 12 is periodically gated to a decimal counter 14 arranged so that if the last significant figure is 0 to 5 the counter produces a positive voltage and if 6 to 9 produces a negative voltage. This output is applied to an integrating capacitor so that if it is positive the capacitor voltage increases, decreasing the capacitance of a varicap diode connected thereto and thus increasing the frequency of the associated oscillator. The next or another subsequent count will therefore increase the six to nine range and the capacitor will then be connected to the negative voltage, discharging the capacitor and lowering the frequency. In this way the frequency will tend towards a value between the two counts. A ten position switch may provide for the sign of the output to changeover between other selected values of digits so that the frequency is stabilized at different values of the last significant figure. Alternately the stabilized fre quency can be varied by varying the number of the cycles gated to the counter as by varying the duration of the gating pulse from 18 (as described below). A bi-stable circuit may replace the counter (Fig. 1, not shown) and this will come to rest in one state for say an even number of cycles and in the other state for the odd number. Accordingly the frequency will tend to a value between a chosen even and odd number of cycles. The Fig. 3 circuit may be used as the local oscillator of a superheterodyne receiver by combining a switch selected sub-harmonic of the master oscillator 16 with the variable frequency from oscillator 12. The switch and a counter 21 controlled by a gate 22 can be so calibrated that they indicate respectively the whole number and decimal values of the frequency of the signal being received. To this end it may be necessary to offset the starting value of the counter 21. The pulse width varying circuit 18 receives regular pulses at its input and steers the leading and trailing edges to respective inputs of a bi-stable circuit 19 via delay circuits R1C1 and R2C2. Varying R2 thus controls the width of the output pulses of the bi-stable circuit. Temperature drift is minimized by making the delay circuit similar.
Patent GB-663308-A (GB)
Title: Method of welding comections between metals and ceramic-metal mixtures
IPC: C04B37/02
Filed: 1949-04-26
Abstract: 663,308. Ceramic-metal seals. LABORATORIO TERLANO DELLA F. E. S. SOC. r. 1. April 26, 1949 [April 26, 1948], No. 11010/49. Class 36. Joints between metals and ceramic-metal mixtures in which the ceramic component consists of or contains reducible metal oxides or oxygen containing metal compounds, are made by reduction welding which increases the metallic content of the mixture at the joint. Either gas or electric arc welding may be used and in the latter case the voltage used exceeds 60 volts and the parts to be joined may be preheated. The reduction process may be assisted by blowing a reducing gas on to the weld point. Specification 665,853, [Group XL (a)], is referred to.
Patent GB-1318011-A (GB)
Title: Nematic liquid crystal material
IPC: G02F1/13
Filed: 1971-04-23
Abstract: 1318011 p-(p-Ethyl-phenoxycarbonyl)-phenyl caproate DAINT SEIKOSHA KK and HATTORI TOKEITEN KK 23 April 1971 [2 May 1970] 11068/71 Heading C2C [Also in Divisions C4 and H4] p - (p - Ethyl - phenoxycarbonyl) - phenyl caproate may be obtained by reacting benzoic acid p-n-caproate with thionyl chloride and then esterifying with p-ethylphenol in pyridine. p-n-Caproyloxy-benzoic acid may be obtained by esterifying p-hydroxybenzoic acid with ncaproyl chloride.
Patent GB-900519-A (GB)
Title: Electric conductor strips
IPC: H05B3/58
Filed: 1957-07-08
Abstract: 900,519. Electric heating tapes. EISLER, P. July 8, 1958 [July 8, 1957], No. 11100/62. Divided out of 900,516. Class 39 (3). An electric heating tape comprises at least one thin flexible insulating layer of small width and great length on which are located at least two separate crimped longitudinal metal foil conductors extending continuously and parallel to the length of the layer, all the conductors being held to the same surface of the layer in such a way that they are substantially free to expand or contract relatively to the insulating layer. In one form the strips may be of the form, and may be held to the layer by zig-zag stitches, as shown in Fig. 4 of Specification 900,516. If more than one insulating layer is provided adjacent the conductors the conductor is held to only one such layer and is free to expand or contract relative to both of them. Thus crimped foil conductors 11 may be located in pockets between regions 12 and 13 of off-set insulating layers 16, 15 stitched together at 14. The terminal connection and methods of construction of the strip are as disclosed in Specification 900,516, as are the applications of the strip. Specifications 700,459 and 900,515 also are referred to.
Patent GB-752009-A (GB)
Title: Improvements in or relating to devices responsive to interruption of a fixed ratio transmission between two rotary machines to initiate protective action
Inventor: CUNLIFFE RAYMOND
IPC: F01D21/02
Filed: 1954-04-15
Abstract: 752,009 Engine stop-gear; gas turbine plant. BRISTOL AEROPLANE CO., Ltd. April 15, 1955 [April 15, 1954], No. 11201/54. Classes 110(3) and 122(4) [Also in Group XXXV] In a turbo-propeller power unit a system is provided for cutting off the fuel supply on failure of the transmission shaft 3 or gear-box 4 between the driving turbine 2 and the pro peller 1. The system comprises permanent magnet alternator 21 on the turbine feeding an induction motor 23, 24, which is of a suitable pole-number to achieve synchronous operation under normal conditions and whose rotor 24 is secured to the propeller. Failure of transmission produces a torque in the spring-restrained motor stator 23 which is used to operate a valve 32 to cut off the fuel supply. The generator and motor may be interchanged.
Patent GB-482788-A (GB)
Title: Toothbrush
IPC: A46B9/04
Filed: 1937-04-20
Abstract: 482,788. Toothbrushes. DEHN, F. B. (Noo Tooth Brush Inc.) April 20, 1937, No. 11291. [Class 19] A toothbrush, Fig. 1, of U-cross-section has the arms 10 mounted at right-angles to a bent up handle 9 and ends 17 of the arms bevelled as shown in line with the handle so that the brush can be inserted well between upper and lower rows of teeth indicated at c-d and ef. Bristles 11 are set parallel with the ends 17. The top end 16 is also bevelled off. In a modification, Fig. 5, a U-shaped insert 18 carrying the bristles is slipped into a slotted handle portion thus facilitating manufacture as the insert is bent from the flat.
Patent GB-746839-A (GB)
Title: Improvements in dielectrics
IPC: H01G4/12
Filed: 1953-04-24
Abstract: A ceramic composition is prepared by firing a batch containing titania, either quartz or silica gel and sufficient baria, or a compound yielding baria on firing, to neutralise all the titania to barium metatitanate and all the silica to barium metasilicate. Barium metasilicate may be used initially.  Other ingredients which may be present are the metatitanates of strontium, calcium or magnesium, magnesium orthotitanate, barium zirconate and barium stannate. Specification 741,614 [Group VI] is referred to.
Patent GB-559689-A (GB)
IPC: C08K3/00
Filed: 1942-08-13
Abstract: 559,689. Methods of hardening resins. KODAK, Ltd. Aug. 13, 1942, No. 11365. Convention date, Aug. 19, 1941. [Classes 2 (ii) and 2 (iii)] [Also in Group XX] Resins and photographic layers and materials containing vinyl alcohol groups are hardened by treatment with a zinconium salt solution. Resins and resin silver salt emulsions specified are polyvinyl acetals, partially hydrolyzed polyvinyl acetate and copolymers and heteropolymers of resins containing vinyl alcohol groups, e.g. vinyl acetate and maleic anhydride. Preferred zirconium salts are the nitrate, sulphate and compounds consisting of zirconium and a cation such as an alkali metal, ammonia or a lower aliphatic amine with sulphate or nitrate anions. A photographic resin emulsion layer may be hardened before or after exposure or immediately following development e.g. in a special or a fixing bath. In examples hardening baths containing (1) 5 per cent. zirconium nitrate solution ; (2) sodium thiosulphate and sulphite, acetic and boric acids, zirconium ammonium sulphate and water (a combined fixing and hardening bath), and (3) zirconium nitrate and triethanolamine are described. Photographic emulsion layers hardened by zirconium salt solutions may be fixed with ammonium thiosulphate. Specifications 531,579, 542,703, 542,704, [both in Group XX], 543,854 and 543,855 are referred to. The Specification as open to inspection under Sect. 91 comprises also the hardening of cellulose esters by treatment with zirconium salt solutions. Specification 479,239 is referred to. This subject-matter does not appear in the Specification as accepted.