baber/WOPTO huggingface dataset:
Patent GB-1088793-A (GB)
Title: Electromechanical transducer
Inventor: CRAGG WILLIAM DONALD
IPC: G01L9/00
Filed: 1964-12-23
Abstract: 1,088,793. Semi-conductor devices. STANDARD TELEPHONES & CABLES Ltd. Dec. 17, 1965 [Dec. 23, 1964], No. 52225/64. Heading H1K. [Also in Division H4] A microphone or other transducer comprises a semi-conductor element biased for flow of electric current therein and a movable member spaced from the element, the member being biased with respect to the element to cause an electrostatic field to be set up in the element. Means responsive to an applied mechanical force is provided to vary the spacing of the member from the element. The strength of the field in the element varies in accordance with the spacing of the member from the element and so varies the value of the electric current flowing in the element. In one microphone (Fig. 3) a field effect transistor has a movable gate electrode comprising an aluminium layer 21 evaporated on a dielectric diaphragm 22 fastened at its edge to the microphone enclosure. Two P-type regions 16, of side-by-side strip configuration (Fig. 6, not shown), are diffused in an N-type block 14 and block 14 is covered by slicon oxide insulation 17, as is half of each region 16. A metal coating 18 connects one P-type region 16 to a positive potential 19 (source) to which is also connected block 14. The other P-type region is connected to a negative potential 20 (drain). In a modification, Figs. 4, 5 (not shown) the P-type regions are formed as a central region (16a) and a surrounding annular region (16b). The gate electrode is an annular layer (21). In each embodiment an aluminium strip 23 extends from the layer 21 to the edge of the diaphragm 22 for connection to a bias potential 24. In another embodiment, Fig. 1 (not shown) the reverse biased P-N junction of a planar epitaxial transistor has a biased electrode (4) near the base-collector junction. The biased electrode (4) is coupled to a diaphragm. An electrical output signal is taken from a resistor (6) in series between base (1) and collector (2). A similar effect is obtained by using the junction between emitter (7) and base (1). Alternatively a P-N junction diode (8), Fig. 2 (not shown, is reverse biased by a battery (9). A movable electrode (10) fastened to a diaphragm (11) is biased by a battery (12) and an ou put signal responsive to the modulation of the spacing of the electrode (10) is taken from a resistance (13) in series between the positive and negative electrodes of the diode.
Patent GB-1593527-A (GB)
Title: Process for the utilisation of blast furnace gas
IPC: F27D17/00
Filed: 1977-12-16
Abstract: In order to take blast furnace gas within the coke oven plant of metallurgical works to a general more economical utilisation, the sensible heat of the hot crude blast furnace gas (m) leaving the shaft furnace (8) is used for preheating the coal (2, 4). The hot crude blast furnace gas (m) can be used directly for predrying (2) and/or heating (4) the coking coal (a). <IMAGE>
Patent GB-1310410-A (GB)
Title: Method for fourier analysis of interference signals
IPC: G01R33/36
Filed: 1970-11-04
Abstract: 1310410 Spin resonance spectrometers SPECTROSPIN A G 4 Nov 1970 [8 Nov 1969 10 April 1970]  52497/70 Heading G1N Nuclear spin resonance interference signals, obtained by pulsing the H.F. field to produce simultaneous excitation of a plurality of resonance lines over a range of frequencies, are analysed by Fourier analysis to determine the individual components in the interference signal, and in order to reduce the required capacity of the analyser computer (and time-averaging computer, if used) the analysis is performed on only a selected portion of the interference signal comprising oscillations within a finite frequency band. Heterodyning is used to form an I.F. signal from which the selected portion is filtered. As shown in Fig. 1, a fundamental oscillator 9 generates a frequency f from which frequencies f o , f t , f l  are derived by frequency synthesisers 8, 13, 14 respectively. f o  is used with a reference resonance sample coupled to coil 4 connected to a Purcell bridge 5 to stabilize the polarizing magnetic field. f t  is the carrier frequency (e.g. 100 MHz) for exciting the test sample which is coupled to crossed coils 10, 30. The carrier frequency f t  is delivered in pulses at a repetition frequency f r  (e.g. 10 Hz) derived from f t  and f 1  through a differencer 31 and divider 32, f r  being fed to a pulse former 17 having outputs connected to an H.F. modulator 11 and a time averaging computer store 27. The spin resonance interference signal f v  from coil 30 is amplified at 19, mixed at 20 with a frequency f m  from a local oscillator 21, and is mixed again at 22 with a frequency f 1 -f m ) from a mixer to produce an I.F. signal of frequency (f v -f f ) o . This signal is fed through a band pass filter 23 and amplifier 24 to a phase detector 25 supplied with a reference frequency f 2  derived from f r  and f t  through a multiplier 33 and differencer 34. The output of the phase detector 25 is passed through a low pass filter 26 to the averaging store 27. The output of the store is fed to the Fourier analyser 28 connected to a chart recorder 29. Different selected portions of the spectrum are chosen by adjusting frequency synthesizer 8. In an alternative arrangement, Fig.3, (not shown) f t  and f 1  are equal, and f 0  and f t  are generated by oscillators (41, 42) adjustably difference-stabilized to fundamental oscillator (9). f r  is derived by dividing (at 49) f t  by a whole number (to avoid jitter). Preferably, f r  is a randomly varying proper fraction of f t  so that the averaging computer will eliminate periodic disturbances. The spin resonance interference signal f v  is mixed with f m  and (f t -f m ) to obtain an I.F. signal which is passed through adjustable low pass and high pass filters (47, 48) to the averaging store (27).
Patent GB-1523639-A (GB)
Title: Decaffeination process
IPC: A23F5/20
Filed: 1975-12-23
Abstract: 1523639 Decaffeination process SOC DES PRODUITS NESTLE SA 23 Dec 1975 [8 Jan 1975] 52572/75 Heading A2B Aqueous extracts of vegetable material (coffee, tea) are decaffeinated by a) contacting the extract with a hydrophobic polymer resin having a dipole moment of less than about 2.0 debye whereby caffeine and non-caffeine solubles are absorbed, b) separating the resin and the extract, c) bleaching the resin with water to remove absorbed caffeine, d) eluting the caffeine-free resin with an aqueous organic solvent to remove non-caffeine solubles, e) removing solvent from the resin by rinsing with water, f) re-using the washed resin in step a). Specified resins include acrylic ester resins and polystyrene-divinyl benzene resins. They should have a surface area in the range 100-1000 square metres and have a porosity volume of from 40% to 60%. Preferably volatiles should be removed before contacting with the resin, e.g. by steam distillation. The organic solvent may be an alcohol, aldehyde or ketone of molecular weight less than 100. The volatiles may be returned to the decaffeinated material. The process may be used to decaffeinate an aqueous material which has been used to decaffeinate green coffee; the decaffeinated liquid may then be recycled.
Patent GB-1451908-A (GB)
Title: Chairs-
IPC: A61B90/60
Filed: 1973-11-15
Abstract: 1451908 Chair anchoring means SIEMENS AG 15 Nov 1973 [16 Nov 1972] 53148/73 Heading A4U In a chair, e.g. for a dentist, a tube 4 carrying the chair seat is slidably mounted in a base 1 and has a member 8 at its bottom for engaging the floor 26 to prevent movement of the chair, the tube being biased by a spring 12 to a raised position in which the member 8 does not engage the floor and being movable against the spring- bias by the weight of a person using the chair to a lowered position in which the member 8 engages the floor, a latch-pin 14 being provided for releasably retaining the tube 4 in its raised position and a locking device manually operable by an arm 5 being releasably engagable with the latch-pin to lock it in its tube retaining position. The locking device includes a pin 18 engaging the latch-pin 14 via a spring 19 and engaged by a spring-loaded eccentric disc 20 which is rotatable by the arm 5. The latch-pin 14 biased to its disengaged position by a spring 25, and it has a bevelled endface so that it can be automatically engaged with the tube 4 when the tube moves to its raised position. The spring 25 can be adjusted by a nut 24 so that it overcomes the force of the spring 19 when the arm 5 is in its unlock position, to disengage the latch-pin 14 from the tube 4. The latch-pin may also retain the tube 4 in its lowered position.
Patent GB-1025732-A (GB)
Title: Improvements in composite electrical circuit units
IPC: H01G2/00
Filed: 1962-10-01
Abstract: 1,025,732. Capacitors. GLOBE-UNION Inc. Oct. 1, 1962 [Oct. 5, 1961; July 26, 1962], No. 53327/65. Divided out of 1,025,731. Heading H1M. The disclosure is identical with that of Specification 1,025,731 but the claims differ.
Patent GB-1205964-A (GB)
Title: A process for embossing latex foam
Inventor: SANSONE ROMANO F
IPC: C08J9/36
Filed: 1967-11-24
Abstract: 1,205,964. Embossing. DOW CHEMICAL CO. 24 Nov., 1967 [25 Nov., 1966], No. 53688/67. Heading B6J. [Also in Division C3] Latex foam is embossed by applying to the cured and dried foam a volatile plasticizer for the foam and embossing the foam by heat and pressure, the temperature and residence time in the embossing device being chosen such that when leaving the device all plasticizer has disappeared from the foam. The foam is essentially derived by mixing an aqueous dispersion of a polymer with from 1-100% (based on the weight of the polymer) of at least one co-reactive material capable of cross-linking the polymer, foaming the mixture, gelling the foam and setting and drying the gelled foam. The polymer may be derived from at least two ethylenically unsaturated monomers chosen from styrene and monomers co-polymerizable therewith at least one of the monomers being styrene or a substitutedstyrene. Examples given are co-polymers of styrene, 1,3-butadiene and acrylic acid or styrene, 1,3-butadiene and fumaric acid or styrene, 1,3-butadiene, fumaric acid and acrylic acid. Alternatively the polymer may be a co-polymer of vinylidene chloride, vinyl chloride and 2 - sulphoethyl methacrylate. The polymer may include one or more of the reactive groups: carboxy, sulpho-, primary amino, secondary amino, carboxamido, methylolcarboxamido, sulphoamido, primary hydroxyl, secondary hydroxyl, phenolic hydroxyl aldehydic or epoxy groups. The co-reactive material may be melamine-formaldehyde resin, urea-formaldehyde resin, urea or melamine. The plasticizer may be water (applied as steam), xylene, trichloroethylene, perchloroethylene, carbon tetrachloride, ethyl alcohol, isopropyl alcohol or butyl alcohol. Embossing may be by a heated embossing roller and an unheated counter roller. The foam may be applied to the back of a carpet before embossing.
Patent GB-1137541-A (GB)
Title: Improvements in or relating to devtal saliva-ejectors
IPC: A61C17/08
Filed: 1965-12-18
Abstract: 1,137,541. Saliva ejectors. A. WADDON. 16 Dec., 1966 [18 Dec., 1965], No. 53754/65. Heading A5R. A dental saliva ejector comprises separately formed metallic shank and intake portions A, F, which are detachably connectable in an airtight manner with the intake portion extending laterally of the shank portion and capable of adjustment about an axis transverse to that of the latter. As shown, the saliva ejector comprises a curved copper tube F closed at one end by a removable plug K and having holes H for receiving the saliva, the tube F being removably and adjustably fitted at its end G into an elbow member C fixed on the shank A and held to the elbow by a gland nut D. The connection between the tube F and the elbow member C includes a nylon bush E and, after loosening the nut D, the tube F may be rotated in the bush or removed for replacement by another tube. The tube F may optionally be provided with a tongue-deflecting blade L and, in an alternative embodiment (not shown), the tube F is formed with a screwthreaded end G and is held to the elbow member by a locknut. The ejector is to be connected at the end B to a suction hose.
Patent GB-1495402-A (GB)
Title: Method and apparatus for the detection of short circuits
IPC: H02H1/04
Filed: 1974-12-12
Abstract: 1495402 Detecting short circuits SOC ANON DES ATELIERS DE SECHERON 12 Dec 1974 [14 Dec 1973] 53763/74 Heading H2K In a system which gives a fault indication if the rate of rise of a direct current remains excessive for more than a predetermined time, the fault indication is suppressed if the rate-ofrise signal increases to a maximum, falls to a minimum and then starts to rise again before the elapse of this time. The system is used in an electric railway installation, and enables current waveforms due to the occurrence of a short circuit to be distinguished from those due to simultaneous starting of several motors. The basic system (Fig. 2a) comprises a current transformer 1 providing the rate-of-rise signal u c  and a threshold detector 2 (which exhibits hysterisis) providing an output ud when this signal is excessive. Occurrence of an output u d  triggers a monostable 3 and if AND gate 4 detects that u d  is still persisting when the monostable resets, a "possible-fault" signal u e  is produced. The blocking circuit (Fig. 2b) for suppressing this signal if the rate-of-rise signal u c  has the waveform of Fig. 4(a) comprises a switchable waveform follower 51 which is triggered (D) by the commencement of the threshold detector output u d  to follow only increases in the rate-ofrise signal u c . so acting as a peak detector. Thus after the peak u h  has been passed the two inputs to signal-decrease detector 52 start to differ, and when this difference reaches a certain amount (#V 1 ) the detector switches a bi-stable 63 to (i) ready one input of an AND gate 62, and (ii) switch the waveform follower 51 so that in now acts as a minimum-value detector. If the rate-of-rise signal u c  now reaches a minimum and rises again by at least an amount #V 2 , signal increase detector 53 is triggered, enabling the AND gate 62, which suppresses (in gate 7) the "possible-fault" signal U e .
Patent GB-1198107-A (GB)
Title: Fine Grain Beryllium Particulate Composites
IPC: C22C25/00
Filed: 1967-11-28
Abstract: 1,198,107. Beryllium base alloy. P.R. MALLORY & CO. Inc. Nov. 28, 1967 [Nov.28, 1966], No.54152/67. Heading C7A. An alloy composite comprises:- Al 12À75 - 28À8% Mg 0À45 - 3À6% and Si 0À15 - 0À9% the balance being Be in an amount of 60-85%. The Be in the composite is preferably present in the form of individual grains 5-10Á in diameter separated by an Al-Mg-Si alloy layer 1-2Á thick and is preferably made by the method of Specification 1,198,108. The cast composite may be annealed at 400‹ C. for 12 hours, quenched in water and then aged at 220‹ C. for 2 hours.
Patent GB-1254735-A (GB)
Title: Moulded nylon articles and a process for producing the same
IPC: B43K7/00
Filed: 1968-11-14
Abstract: 1,254,735. Coated articles. SUMITOMO ELECTRIC INDUSTRIES Ltd. 14 Nov., 1968 [14 Nov., 1967], No. 54168/68. Heading B2E. [Also in Division C3] A ball-holder for a ball-point pen is moulded from nylon containing an inorganic bulking agent and has on at least one surface a layer produced by an addition or cross-linking reaction between the nylon and one or more improving agents selected from an epoxy compound, an imine compound, an isocyanate compound, a ketene or a carbodiimide. The rigidity and the friction-resisting property of the moulding is thereby increased and the water absorbing-property improved. The nylon moulding may be treated with a liquid, solution or vapour of the improving agent. The nylon used is defined as a thermoplastic polyamide resin. The nylon may include a bulking agent such as glass fibre or metal powder which may be surface treated by a silane or a borane to improve the bonding between the bulking agent and the nylon. Examples of the improving agents, solvents for the improving agents, and catalysts for the reaction are given.
Patent GB-1575650-A (GB)
Title: Percussive drilling devices
IPC: E21B7/26
Filed: 1977-12-31
Abstract: A cylindrical body (1) has a conically pointed head part (2), adjoining which is a rod (6) which at its end has a conical head (7) which has two surfaces (8) parallel to one another. The body (1) carries a pointed hollow attachment (3) which has a transverse wall (4) in its interior. Arranged in the transverse wall (4) is a profiled aperture (10) through which the conical head (7) can be inserted like a key. The conical head (7) is locked in the hollow space of the attachment (3) by turning the body (1) about its axis through an angle of about 90 DEG , so that the attachment (3) driven into the bore to be made can be pulled out of the bore again by means of the body (1). On the other hand, the attachment (3) can be easily separated from the body (1) by the conical head (7) and the aperture (10) being brought into line again. Such a device enables the attachment (3) to be recovered and reused. <IMAGE>
Patent GB-1283446-A (GB)
Title: Method of making aqueous polymer dispersions for coating paper and the like
IPC: C08J3/03
Filed: 1970-11-17
Abstract: 1283446 Coating paper NATIONAL CASH REGISTER CO 17 Nov 1970 [15 Dec 1969] 54589/70 Headings B2E and B1C [Also in Divisions C3 and D2] Paper is coated with an aqueous dispersion of a meltable, oil soluble but water-insoluble acidic polymeric material is used to coat paper by such methods as roll, air-knife and trailing blade coating. The preferred polymers are those having free OH groups such as phenolaldehyde and phenol-acetylene resins. The dispersion preferably includes a hydrophilic colloid forming binder such as raw starch and may also include SiO 2 . Other additives include clay, styrene-butadiene latex, CaCO 3 , a dispersant such as a glassy phosphate, surfactants such as a sodium salt of a polyelectrolyte, lubricants such as calcium stearate, germicides, fungicides and defoaming agents. A typical coating composition comprises in % wt polymer 15; starch 9; silica 3; latex 5; clay 59; CaCO 3  9; and water. In apparatus for making the aqueous dispersion an aqueous slurry of polymer, starch and silica is pumped to an annular chamber 26 where a jet 24 discharges steam at a higher pressure causing melting and subdivision of the polymer particles and formation of an emulsion in the tube 27. Excess of uncondensed steam is released in flash chamber 33, the thus cooled liquid dispersion being discharged at 35.
Patent GB-1284105-A (GB)
Title: Printing mechanism for electrical business machines
IPC: B41J1/30
Filed: 1969-11-07
Abstract: 1284105 Selective printing OLYMPIA WERKEAG 7 Nov 1969 [7 Nov 1968] 54697/69 Heading B6F In a selective printer with a continuously rotating type disc 1 (Fig. 5) mounted on a carriage, the selection system includes two electromagnets (25, 26, Fig. 3) which are selectively energized in accordance with what key (42, Fig. 6) is depressed, the timing being controlled by a commutator (Fig. 4) driven by the continuously rotating main drive shaft 13. This same shaft 13 drives via a bevel gear 11, 12, Fig. 1, a cam plate 7 and the type disc 1. Energizing one or other of the magnets 25, 26 tilts a bar 20 exteding the full line length of the machine one way or the other to operate one of a pair of levers 18 which bring one of two selection hammers 16 into the vicinity of the cams 15 carried, by the cam plate 7. The selected hammer 16 is thereby impelled against the printing hammer 17 to cause imprint with the flexible disc. Case shift of the type disc is achieved by shifting its axis of rotation.
Patent GB-1253978-A (GB)
Title: Analogue signal processing system
Inventor: MICHAEL PETER COLIN
IPC: H03M1/00
Filed: 1968-11-20
Abstract: 1,253,978. Analog/digital converter. MICRO CONSULTANTS Ltd. 11 Nov., 1969 [20 Nov., 1968], no. 54996/68. Heading G4H. In an analogue/digital converter of the type in which the unknown analogue input current I 0  is successively modified by subtracting reference currents I 1 , I 3 , I 5  a current detector detects the direction of flow of current after each modification and controls the application of a current I 2  (equal to I 1 ), I 4  (equal to I 3 ) if the flow is negative. Each detector also supplies a digital output bit in accordance with the direction of current flow. In the embodiment of Fig. 1 I 1  = 2I 3  = 4I 5  so that the output is binary coded. A binary coded output may also be obtained by using equal current sources and feeding the current through an amplifier of gain 2 before each modification (Fig. 4, not shown). The currents I 2 , I 4  are fed via transistor or diode switches controlled by the current detectors 1, 2 which are preferably differential amplifiers.
Patent GB-1405604-A (GB)
Title: Cooling component for a stack of semiconductor components
Inventor: LUDWIG K
IPC: H01L23/473
Filed: 1972-11-28
Abstract: 1405604 Cooling semi-conductor devices SIEMENS AG 28 Nov 1972 [4 Dec 1971] 55016/72 Heading H1K Cooling components located between the semi-conductor elements of a stack of devices such as rectifiers or thyristors each comprise two disc-shaped cooling plates 8, 9 connected in fluid-tight manner to opposite ends of a cylindrical connecting member 1. The member I has diametrically opposed inlet and outlet coolant ducts 2, 3 which communicate with bores 4, 5 extending longitudinally along the member 1 and symmetrically disposed with respect to the central axis of the member 1. At their outer ends the bores 4, 5 connect with series of uninterrupted annular ducts 10 in the plates 8, 9, thus providing a symmetrical flow of coolant through the cooling component. The improved flow conditions resulting from this may permit a coolant with lower heat-dissipating capacity than water to be used, this being of advantage in high voltage installations. The seal between the plates 8, 9 and the member 1 relies upon the coaction of peripheral flanges 6a-9a, and a sealing ring is preferably also provided. Electrical connection to the cooled devices may be made via a terminal arrangement on the member 1.
Patent GB-553663-A (GB)
Abstract: 553,663. Solid fuel stoves. SVENSKA AKTIEBOLAGET GASACCUMULATOR. Sept. 3, 1942, No. 12462. Convention date, Sept. 9, 1941. [Class 126] In a continuously burning, cooking stove a minimum combustion of the fuel in the chamber 4 is maintained by air entering through an inlet 9 in the ashpit door 10 and passing through a duct 8 and the lower part of the fuel to the flue 3. If the insulating member normally covering the hot plate 5 is removed and replaced by a cooking utensil a heat sensitive member 15 embedded in the hot plate causes a thermostat 16 to raise a disc 13 to admit air to a pipe 11 passing through the fuel to the upper part of the chamber. The air passing through the pipe becomes heated to a temperature higher than the ignition temperature of the fuel so the fuel immediately below the hot plate becomes ignited and provides a maximum combustion zone. The pipe 11 is formed internally with heat conducting flanges 12. If desired the air supply to the duct 8 may be controlled thermostatically and the supply to the pipe 11 controlled manually. The grate may be vertical and divided into sections the air supplies to which may be cut off separately. Specification 547,225, [Group XII], is referred to.