baber/WOPTO huggingface dataset:
Patent GB-1101906-A (GB)
Title: Improvements in or relating to the manufacture of semiconductor circuits or assemblies
IPC: H01L23/29
Filed: 1966-04-25
Abstract: 1,101,906. Semi-conductor devices; circuit assemblies. SIEMENS A.G. 25 April, 1966 [26 April, 1965], No. 17956/66. Headings HlK and HlR. A semi-conductor circuit or assembly of devices is made by forming the components at desired areas of one face of a semi-conductor wafer, by forming electrical input and output connections for the components and if the components are to form a circuit by also forming interconnection between the components, by selectively etching away portions of the wafer which have no electrical or mechanical function in the circuit or assembly, and by filling the spaces between the semi-conductor bodies thus formed with an electrically insulating material. Strip-shaped gold leads are suitable connections. Each body may contain one or more components. Several assemblies or circuits may be produced simultaneously from a single wafer, each encapsulated unit for convenience being linked to its neighbours by a strip of encapsulant (Fig. 4, not shown). Groups of planar silicon devices such as transistors and diodes may be manufactured or the bodies may contain individual transistors which may be split from the assembly after the insulating material has hardened. Suitable insulating materials are epoxy, silicone, and polyester resins. The wafer is etched into bodies and the insulating material applied to the gaps preferably while the active face of the device is attached to an etch resistant plate. The insulating material may be applied by silk-screening or by the use of a press mould or cast mould. A mould may be removable or, when made of synthetic resin, may be left in position to form part of the casing of a device. The insulating material used to fill the gaps may be the same as or different from that used to coat the active face. Additives include siccatives (such as boron trioxide, calcium oxide, calcium sulphate, calcium hydride, and barium hydride) and heat-conducting fillers (such as magnesia and alumina). The potted group may be used as it is or may be enclosed in a metal can.
Patent GB-640695-A (GB)
Title: Improvements in and relating to frequency-modulated radio transmitters
IPC: H03C3/06
Filed: 1945-07-13
Abstract: 640,695. Frequency modulation. GENERAL ELECTRIC CO., Ltd., and CAMPBELL, G. C. L. July 13, 1945, No. 17962. [Class 40 (v)] A frequency-modulated wave fŒd of basic frequency f and deviation d is multiplied in frequency by a large integer n to produce the frequencies nfŒnd. The basic wave is also multiplied by a factor n - p, where p is a small integer to produce the frequency nf - pf. These two resultant frequencies are mixed and the difference pfŒnd is selected, thus obtaining a wave in which the basic frequency f has been multiplied by a small integer p (which may be unity), whilst the deviation has been multiplied by a larger integer n. As shown, a crystal 10 of basic frequency f is connected in the grid circuit of a pentode valve 11 having a cathode circuit 14 tuned to the frequency f and an anode circuit 22 tuned to nf -pf. Voltage of frequency f is applied to a phase-modulating valve 16 which produces a modulated wave of frequency fŒd in its anode circuit 17. This is fed to the multiplier valve 19 to produce an output wave of frequency nfŒnd in the circuit 20. The outputs from the valves 11, 19 are mixed in the valve 21 and the difference frequency pfŒnd is selected in its anode and output circuits 24, 25. Further frequencymultipliers of low multiplying factor may be fed from the circuit 25. Disclaiming reference is made to Specification 623,222. The phase-modulating valve 16 is fed with the signal at 18, and the wave f is applied to its grid through a phasing network 15<SP>1</SP>, 27, thus producing a signal-modulated phase-displaced wave on the anode. This combines vectorially with a wave applied directly to the anode through a condenser 15, to produce a wave fŒd of varying phase and frequency.
Patent GB-956597-A (GB)
Title: Improvements in or relating to induction furnace susceptors
IPC: B22F5/00
Filed: 1961-05-17
Abstract: Cylindrical structures of high melting point metals, e.g molybdenum, tungsten, tantalum, or niobium, are formed by sintering together a plurality of parts each in the form of a sector of a cylinder.  The parts are themselves formed of compressed powder, sintered either prior to, or at the same time as, their sintering together, and may be provided both with correspondingly shaped portions at their mutually abutting surfaces, and with additional metal foil or powder at these surfaces.
Patent GB-690235-A (GB)
Title: Improvements in woven fabrics
IPC: D03D25/00
Filed: 1950-07-19
Abstract: 690,235. Greenhouse blinds. CHICOPEE MANUFACTURING CORPORATION OF GEORGIA. July 19, 1950 [July 19. 1949], No. 18083/50. Class 142(iv) A lath-type shade is simulated by a fabric having alternate opaque and transparent stripes 17, 15, woven from white pigmented vinylidene chloride polymer or copolymer monofilaments. The warp strands 12 in the opaque stripes are up for two picks and down for two picks, causing the weft strands 13 to bunch together in pairs.
Patent GB-610502-A (GB)
Title: Improvements in or relating to pivot connections
IPC: F24C15/16
Filed: 1946-06-17
Abstract: 610,502. Plate racks. STOVES, Ltd., and RICHARDSON, W. June 17, 1946, No. 18094. [Class 126] [Also in Group XXV] A plate rack 9 is provided a each side with a pivot pin 7 and an abutment pin 8 adapted t( co-operate with a socket mem ber 1 secured to the side flange of the hinged lid of a domestic cooker and adjacent the forwarc edge thereof. The socket mem ber is formed with a pivot open. ing 2 adapted to allow the pivol pin limited displacement there in, and with notches 3 and 4 separated by a cam surface 5. The abutment pin is adapted, when the lid is open, to engage with either of the notches for holding the rack alternatively in a vertical or a horizontal position. Specification 498,138, [Group XXV], is referred to.
Patent GB-1526665-A (GB)
Title: Filter circuit for dividing an electrical signal into at least two components of respective frequency bands
IPC: H04R3/14
Filed: 1977-04-29
Abstract: 1526665 Local circuits for loudspeakers &c. INDUSTRIE A ZANUSSI SpA 29 April 1977 [12 May 1976] 18130/77 Heading H4J A filter circuit for dividing an electrical signal into a plurality of complementary frequency bands comprises a corresponding plurality of band-pass sections one of which produces its output by the algebraic subtraction of the output or outputs from the or each other section from the said electrical signal. As shown signals for a mid-range speaker 10 are derived by substraction from the total signal input 3 of signals 6 and 7 fed to speakers 8 and 9 by low and high pass filters 4 and 5 respectively.
Patent GB-751550-A (GB)
Title: Improved pilot bit for an earth boring auger
IPC: E02F5/16
Filed: 1954-06-21
Abstract: 751,550 Earth-boring apparatus. PETERSON, G. A. M. June 21, 1954 [March 4, 1954], No 18163/54. - Class 85 The pilot bit of an earth - boring auger comprises a cone-shaped body formed integrally with a pair of outwardly - extending blades, each blade having concave convex cross sections in planes at right angles to the axis of the cone to provide a concave leading face and a convex trailing face relative to the direction of rotation of said bit when cutting and descending from the base end of the cone with a diminishing radial direction in a spiral fashion to terminate beyond the apex of the cone in a chisel-like cutting edge. The two cutting edges of the fish tail portion thus formed below the apex of the cone have a combined orbit comparable to the base of the cone, and each cutting edge precedes a parallel vertical plane that bisects the fish tail.
Patent GB-226453-A (GB)
Title: Improvements in or relating to convertible knapsacks and tents
IPC: A45F4/04
Filed: 1924-05-15
Abstract: 226,453. Reichert, W. May 15, 1924. Addition to 216,857. Knapsacks.-An improvement in or modification of the invention claimed in the parent Specification comprises the use of a tent fabric section e<1> as a coat by slitting it down its middle for the passage of a head and providing it with buttons and a hood h the knapsack forming a protection for the back of the wearer. It also comprises the use of two portable tents to form a large tent by the use of auxiliary trapezian shaped fabric sections q with rectangular extensions i erected as shown in Fig. 3, the knapsack covers g closing the remaining side apertures.
Patent GB-334945-A (GB)
Title: Improvements in or relating to cash registers
IPC: G06C11/02
Filed: 1929-06-13
Abstract: 334,945. Douchkoff, D. June 13, 1929. Cash registers.-In a cash register in which the monev values are marked on rotatably mounted discs arranged one behind the other and slotted or apertured to enable the markings to be observed, the discs are operated by rotatably mounted dials. The markings may be made visible from both the back and front. The discs 4, 10 are concentrically mounted on the bushing 2 and are fitted with finger dials 6, 11 respectively. Spring-pressed balls 14, 15 are adapted to guide and, by engaging with depressions, steady the discs when the latter are brought into the desired position before the window 13. A spring-pressed plunger 20 is adapted through arms 24, 23 to release a catch 32 allowing the spring 28 to push open the drawer 26. The discs 4, 10 drive a totalling device anil printing rollers from which tickets printed with the amount registered by the discs may be obtained on operation of a spring-pressed plunger. Means may be provided for withdrawing the spring-pressed balls 14, 15 allowing the discs to return to the zero position under the action of a spring. In a modification, the drawer 26 may be released by a small movement of the arm 8 which is provided as a stop for the finger dials.
Patent GB-810743-A (GB)
Title: Improvements in and relating to vehicles for transporting powder or other granular material
Inventor: OGLETHORPE EDWARD LEWIS
IPC: B61D5/00
Filed: 1956-06-13
Abstract: 810,743. Air-assisted gravity conveyers on vehicles. DURAMIN ENGINEERING CO. Ltd. July 15, 1957 [June 13, 1956], No. 18252/56. Classes 78 (1) and 78 (4). Inwardly sloping air-assisted gravity conveyers 9 mounted in a housing outside the tipping body of a vehicle deliver material from the interior of the body to a central rear discharge aperture. As illustrated the conveyers 9 feed material to a vaned rotor 13 from which the material is blown by a pneumatic conveyer 14. Air is bled from the rotor through a pipe 16. The material reaches the conveyers 9 through a hinged or removable flap 8 extending over the full width of the vehicle, and its passage is controlled by a baffle 15. The porous base of the conveyers 9 has the section shown in Fig. 2 so that a portion of it is still horizontal when the body is tipped. The body has a tailboard (not shown) hinged at the top or at the bottom so that the material can be delivered without the aid of the conveyers, and the canopy 4 of the body may be removable.
Patent GB-186718-A (GB)
Title: Improvements in or relating to vehicle wheels
IPC: B60B27/00
Filed: 1921-07-06
Abstract: 186,718. Smith, H. Melville-, and Smith, H. M. Melville-. July 6, 1921. Hubs for tension-spoked wheels comprise inner and outer shells a, b, which are suitably connected together and between which lie the heads of the spokes d, the outer shell being split longitudinally into two or more parts. The spoke heads are housed in recesses formed either in the outer or the inner shell. The parts forming the hub are united by welding, or by spinning so as to cause them to interlock, or by annular bands placed over the outer shell and welding. Relative rotation between the shells is prevented by keying or by serrating the adjacent faces.
Patent GB-406554-A (GB)
Title: A leaf-spring suspension system for a motor-vehicle
IPC: B60G11/04
Filed: 1933-06-28
Abstract: 406,554. Radius rods and the like. HUMBER, Ltd., and WISHART, N. M., Stoke, Coventry. June 28, 1933, No. 18377. [Class 79 (iv).] A leaf spring suspension system comprising a spring mounted on the axle and having its ends pivoted and shackled respectively to the chassis frame and to a radius rod hinged to the axle and extending away from the shackled end of the spring, has the radius rod formed of U -section. As shown, the leaf spring 11 is shackled to the frame 15 at the end 13 and pivoted to a bracket 21 thereon at the end 14. The radius rod 16, which is of U-shape in cross-section so as to have torsional flexibility, is pivoted at 24 to a lug on the axle 12, and at 22 to the juncture of struts 19, 20 secured to the frame 15 and bracket 21 respectively. The points 22, 24 are so arranged that, as viewed in side elevation, they form two apices of a parallelogram, the other apices of which are formed by the forward hinged end 26 of the drag link and the centre 27 about which this oscillates as the spring flexes. In a modification, the spring is pivoted directly at the front end, over which the radius rod is disposed, and shackled at the rear end.
Patent GB-981164-A (GB)
Title: Electronic memory system and switch arrangement therefor
IPC: H03M1/00
Filed: 1961-05-19
Abstract: 981,164. Electrostatic digital data storage apparatus. F. H. SHEPARD. May 19, 1961 [May 19, 1960], No. 18390/61. Heading G4C. [Also in Division H3] In a memory circuit, a number is remembered by charging a capacitor to a corresponding voltage level, comparing this remembered voltage with a voltage staircase, deriving a pulse at the instant when the two voltages are equal and using this pulse to actuate an electronic switch which applies to the capacitor a voltage equal to the voltage to be remembered. As described, 64 numbers are given an octal coding and the two voltages representing each number are stored in a coarse memory capacitor 122 and a fine memory capacitor 102. Considering the fine level circuit, valves 114, 116 are momentarily cut off to render valve 106 conducting, thus connecting the "fine level" input 110 to capaciter 102. The potential across capaciter 102 is then compared with the "fine staircase" voltage in circuit 140, 142 which produces an output pulse to cut off valve 154 when ever the staircase voltage exceeds that being remembered. A similar circuit cuts off valve 160 when the "coarse" staircase voltage exceeds the voltage stored in capacitor 122, and when both 154, and 160 are cut off a positive output pulse is produced on line 184. At the end of the coarse level at which 160 is cut off the "knockdown" of the "fine" staircase applies a positive potential to capacitor 168 on lead 182 and switches valve 160 on again to terminate the output pulse. The output pulse produced switches on r.f. oscillator 190 to ionize the gas in diode switches 192 (see Division H3), which connect the regenerate signal inputs 220, 222, to the capacitors 102,122 and produce also output pulses if capacitor 212 is previously charged through switch 216. Further switches may be connected to a second generator 224 to reset the circuit. Specification 825,646 is referred to.
Patent GB-108105-A (GB)
Title: Improvements in Pressure Releasing Devices for the Rollers of Clothes Wringers.
Inventor: HEMENWAY JOHN FRANCIS
IPC: D06F45/00
Filed: 1916-12-22
Abstract: 108,105. Hemenway, J. F. Dec 22, 1916. Wringers, roller-separating arrangements for - The latches for holding the top-bar are carried by the top-bar, and normally engage with leepers mounted on the side frames; they are released when desired by sliding rods pushed outwards by means on the top-bar. The pressure-screw boxes 5 are formed with extensions 6 carrying pivots 8 for the latches 10, the ears 12 of which normally engage with the upper ends of slots 13 in the plates 14. By depressing a spring button 21 having a conical end, the sliding rods 17 are pushed outwards and thereby disengage the latches and release the top-bar 4, the upward movement of which is limited by the engagement of the tails 15 of the latches with the top of the slots 13.
Patent GB-186188-A (GB)
Title: Improvements in gramophones
IPC: G10K13/00
Filed: 1921-07-07
Abstract: 186,188. Sullivan, P. D. July 7, 1921. Grant of Patent refused. Sound magnifying and directing appliances.- Relates to sound-applying devices for gramophones, of the kind described in Specification 176,273, in which the sound is directed against a reflecting metal horn by a conducting tube A passing through and secured to the wall of the horn. According to the invention, the reflecting horn B is of circular cross-section.
Patent GB-194228-A (GB)
Title: Improvements relating to knot-catchers or yarn-clearers for yarn-winding and analogous machines
IPC: B65H63/06
Filed: 1922-07-05
Abstract: 194,228. Smith, P., Waterhouse, D., and Wadsworth, F. July 5, 1922. Clearing-apparatus.-A yarn clearer for yarn-winding and like machines comprises two fingers 1, 2 kept parallel by means of two guide pins 3, 4 and adjusted to the required distance apart by a differentially-threaded screw 5. An aperture 6 is provided for attachment to the machine.
Patent GB-1135786-A (GB)
Title: Telephone exchange loop supervision
IPC: H04M3/22
Filed: 1967-04-21
Abstract: 1,135,786. Telephone exchangers. INTERNATIONAL STANDARD ELECTRIC CORP. 21 April, 1967 [23 April, 1966], No. 18479/67. Addition to 1,135,785. Heading H4K. Threshold detectors in line circuits as described in Specification 1,135,785 are arranged in a matrix such that the two potential divider reference voltages with respect to which each detector obtains a balance are supplied selectively to one column and one row wire so as to gate one detector while blocking all others. The matrix may be four dimensioned with each divider requiring coincidence of two co-ordinates before it obtains its reference voltage in place of the normal blocking voltage. The detectors may be transistors or diodes.
Patent GB-1402186-A (GB)
Title: Torsional vibration transducer
IPC: G01H1/10
Filed: 1972-04-21
Abstract: 1402186 Torsional vibration transducers BRITISH LEYLAND (AUSTIN MORRIS) Ltd 6 April 1973 [21 April 1972] 18515/72 Heading G1A In a torsional vibration transducer two apertured masks mounted on a shaft 11 adapted for mounting on a test piece rotate relative to each other in dependence upon the degree of vibration so that light passing therethrough to a photo-cell varies in intensity. A seismic disc assembly 14 mounted on shaft 11 by way of needle roller bearing 15 comprises a central boss 17 linked to annular inertia weight 18 by way of a disc 19 which is made up of angularly spaced sections which define between them slots 21, Fig. 2 (not shown). A disc assembly 25 comprising a central boss 23 secured to the shaft 11 by grub screws 24 includes sectors 26 which define between them slots of similar form to slots 21. Light 34 passes through the two disc assemblies to fall on an annular photoelectric cell 29 mounted on a backing flange 30 located by a torque arm 31 and mounted on shaft 11 by roller bearings 28 so as to have complete rotational freedom of movement about axis 16. With the workpiece e.g. an i.c. engine mounted on flange 12 subject to vibration the area through the discs through which the light passes varies directly as the amplitude of vibration at any instant and the output signal of the photo-cell 27 is a measure of this instantaneous value. Springs 32 (not shown) and 33 connected between the weight 18 and disc assembly 25 serve to relatively centralise the seismic and fixed disc assemblies.
Patent GB-927192-A (GB)
Title: Apparatus for the production of negatively ionized aqueous aerosols for the treatment of living organisms
IPC: A61M11/06
Filed: 1961-05-23
Abstract: 927,192. Electrostatic separation. A. LANGEVIN. May 23, 1961 [May 30, 1960; Feb. 18, 1961], No. 18583/61. Class 117. [Also in Group XXIX] In an apparatus for producing a negatively ionized aqueous aerosol (see Group XXIX), an aerosol containing both positively and negatively charged particles is fed through a nozzle 10 into a metallic container 8 where the positively ionized aerosol part is removed and the negatively ionized remainder flows from a pipe 12. The container 8 is connected to a negative potential by a terminal 21 and houses a wire gauze cylinder 13 connected to a positive potential by a terminal 15 so that the positively ionized particles are attracted to the container wall and pass to a receptacle 23, whereas the negatively ionized particles flow through the cylinder 13 to the pipe 12.
Patent GB-960325-A (GB)
Title: Improvements in or relating to plasma accelerators
Inventor: FONDA-BONARDI GIUSTO
IPC: H05H1/02
Filed: 1962-05-15
Abstract: 960, 325. Thermonuclear apparatus. LITTON INDUSTRIES Inc. May 15, 1962, No. 18583/62. Heading G6P. A plasma accelerator in which a plasma is accelerated along an evacuated closed path comprises a rotating magnetic field for accelerating the plasma and means for constraining the plasma to a closed path. In one arrangement, Fig. 1 (not shown), a pair of wires are bent into a circle and energized in parallel by high frequency alternating current to produce a magnetic field which confines the plasma to a circle adjacent the wires. Around the circle are arranged eight coils energized by two-phase alternating current to produce a rotating magnetic field, in the same manner as the stator windings of a two phase induction motor, and this rotating field accelerates the plasma. The whole apparatus, including a gas supply means, is contained in an evacuated container. In another arrangement, Fig. 4, the two magnetic fields are combined and one produced by a plurality of U- shaped conductors, such as 31a-31f, arranged round the outside of an evacuated toroidal tube 29. The conductors are energized by a polyphase generator to produce a rotating magnetic field, and the conductors are inclined to tangential planes of the tube 29 so that the field has a component tending to confine the plasma in the tube 29. In a modification, Fig. 7 (not shown), the U-shaped conductors diverge towards their bases and are arranged in tangential planes. In thermonuclear apparatus, Fig. 8, (not shown), two or more plasma accelerators of the type described are arranged with the planes of their toroids at an angle, e.g. a right angle, to each other with the toroids intersecting to form a reaction volume where the two plasma beams collide and react.
Patent GB-573244-A (GB)
Title: Processes for producing 2-amino-3-carboxylpyrazines
IPC: C07D241/28
Filed: 1943-11-09
Abstract: 2-Amino-3-carboxyl-pyrazine and its 5,6-dimethyl derivative are obtained by treating lunazine and 6,7-dimethyl lunazine respectively with aqueous caustic alkali, preferably at a temperature above boiling.  The temperature is then reduced advantageously, ammonia is liberated from the pressure vessel, the solution is boiled to remove remaining dissolved ammonia, hydrochloric acid is added, the solution is cooled and the solid is collected, washed and dried.  Examples 1, 2, 3 and 4 relate to the preparation of 2 - amino - 3 - carboxyl - pyrazine using respectively 3 mols, 2 mols, 1 mol of sodium hydroxide and 3 mols of potassium hydroxide per mol. of lunazine and heating in a pressure vessel for 2 to 5 hours at 170 DEG  to 188 DEG  C. Example 5 relates to the similar conversion of 6,7 - dimethyl - lunazine to 2 - amino - 3 - carb - oxyl-5,6-dimethyl-pyrazine.