baber/WOPTO huggingface dataset:
Patent GB-1493591-A (GB)
Title: Microphone arrangements for use in telephone apparatus
IPC: H04R3/04
Filed: 1974-01-15
Abstract: 1493591 Microphone arrangements GENERAL ELECTRIC CO Ltd 8 Jan 1975 [15 Jan 1974] 01846/74 Heading H4J A microphone arrangement for telephone apparatus comprises a microphone having a resonance peak 16 (Fig. 2) in its frequency response in the middle or lower portion of the telephone voice frequency range. The output signal from the microphone is amplified by an amplifier having an input impedance which combines with the electrical impedance of the microphone to provide an amplifier gain which rises with frequency substantially over the whole of the frequency range (curve 17). This frequency response combines with the microphone resonance peak to provide an overall frequency response which rises with frequency over the lower portion of the voice frequency range and is substantially constant over the upper portion of said range. The microphone may use a multimorph piezoelectric ceramic element or an electret comprising a permanently charged film of P.T.F.E. Microphone capsule 1 (Fig. 1) has a plastics body 2 and an aluminium cover 3. The edge of cover 3 is turned over to retain a metal foil diaphragm 4. This has a conical centre portion whose apex bears against piezoelectric element 5 which rests on pillars 6. Electrical connections 7 from element 5 lead through two stakes 8. The base of body 2 carries an integrated circuit amplifier (Fig. 3) associated with a printed circuit board (not shown). Capsule 1 and the printed circuit are enclosed in an outer cover of which a gasket 9 forms part. Cover 3 has a single aperture 10 closed by a disc 11 of cloth or porous metal forming an acoustic resistance. Gasket 9 has a single aperture 12 which communicates with a limited number of apertures 13 (e.g. one) in the mouthpiece 14. This construction provides the low resonance peak 16 (Fig. 2). Element 5 has a source capacitance of 500 picofarads and when coupled to an amplifier having an input impedance of 100 kilohms has a change in characteristic at about 3200 Hertz. This frequency response 17, together with the response 16 provides an overall response 19. The amplifier (Fig. 3) comprises two output transistors 21, 22 to both of which amplified signals from microphone 1 are applied from a preamplifier stage 23. One of the transistors 21, 22 controls the current flow between output terminals 24, 35, depending on the polarity of the energizing supply to terminals 24, 25. The other transistor is shunted by a respective diode 26 or 27. Diodes 26, 27 may be Zener diodes, protecting against voltage surges in the supply to terminals 24, 25.
Patent GB-1001823-A (GB)
Title: Improvements in or relating to 4-hydroxy homothiaxanthenes
IPC: C07D337/12
Filed: 1961-08-16
Abstract: The invention comprises compounds of the general formula <FORM:1001823/C2/1> in which R1, R2 and R3 are hydrogen or alkyl (1-4 C), and either R4 and R5 are alkyl (1-4 C) or NR4R5 is morpholino or piperidino, with the proviso that when two of R1, R2 and R3 are hydrogen, R4 together with the remaining substituent of R1, R2 and R3 may represent an alkylene (2-4 C) radical; and their preparation by reacting homothiaxanthone with a compound Hal.Mg.CHR1.CHR2.CHR3.NR4R5, where Hal is chlorine, bromine or iodine, and hydrolysing the resulting magnesium complex.  Isomers of a product are separated. Specifications 1,001,824 and 1,001,825 also are referred to.
Patent GB-232694-A (GB)
Title: Improvements in gas heated boilers
IPC: A47J27/026
Filed: 1924-01-25
Abstract: 232,694. Sugg & Co., Ltd., W., and Sugg, P. H. Jan. 25, 1924. Washing-boilers.-In gas-heated boilers of the type in which an inner pan a is contained within a casing c the inner pan being formed with an out-turned flange d resting upon the outer casing the products of combustion from the burners passing through the space between the pan and the casing and the pan being provided at the bottom with a draw off cock h which passes through the casing, the casing is formed with an out-turned flange b in which is located a groove f into which a head e on the inner casing enters. This construction is designed to prevent liquid which may boil over from entering the space between the inner and outer casings. The positions of the groove and head may be reversed and the groove may be lined with asbestos.
Patent GB-161335-A (GB)
Title: Improvements in trivets
IPC: F23H17/00
Filed: 1920-01-22
Abstract: 161,335. Booth, G. Jan. 22, 1920. Trivets. - An adjustable trivet consists of a foundation plate a adapted to be attached to the fire-bars, as by a clamping-plate h, and having guides b in which a pillar e slides vertically. The pillar carries an horizontal arm m, rotatable about it and having a series of holes for a pin l on the trivet k. The adjusting-handle d of the pillar e engages a series of notches c in the guides b to retain the pillar at the desired height.
Patent GB-317289-A (GB)
Title: A chronological device, particularly adapted for use in determining the local times of foreign wireless or television programmes
IPC: G09B29/14
Filed: 1929-01-21
Abstract: 317,289. Willis, J. H. Jan. 21, 1929. Local-time calculators. - To compare the standard times of various places in the world an hour-graduated disc 7 is rotatably mounted on a chart bearing radiating lines of meridian and the names of the corresponding localities traversed by them. The disc mav have a dark half to denote night time and an arm 11 extending over the usual broadcast period. Specifications 9223/89, 11767/99 and 548/00 are referred to.
Patent GB-150610-A (GB)
Title: Improvements in record and similar devices
IPC: B42D19/00
Filed: 1920-01-22
Abstract: 150,610. Tarras, H. M. Jan. 22, 1920. No Patent granted (Sealing fee not paid). Roll holders and cases.-A record or like appliance of the kind in which a roll of flexible material bearing printed, written, or other matter is mounted in a casing and may be withdrawn therefrom is made in the form of a slotted cartridge 1 and a part of the cartridge, such as the bullet 3, is rotatable to turn the roller for rewinding the material after it has been withdrawn through the slot: An ordinary bullet may be adapted to rotate and drilled to receive one end of the roller, or a bullet may be made with a roller integral therewith. The other end of the roller is supported on a pin 6 passed through the base la of the cartridge and screwed into the roller; the rim is provided with a head 7 representing the percussion cap.
Patent GB-1492746-A (GB)
Title: Androstane derivatives and compositions containing them
IPC: A61K31/565
Filed: 1974-01-17
Abstract: 1492746 #<SP>2</SP>-Androstenes THERAMEX SA 17 Jan 1975 [17 Jan 1974] 02211/74 Heading C2U [Also in Division A5] The invention comprises 17α-ethynyl-5α- androst-2-en-17#-ol and its acetate free from their respective #<SP>3</SP>-isomers; and their preparation from the analogously pure corresponding 17-one by reaction with an alkali metal salt (simple or complex) of acetylene, followed when required by acetylation. 5α - Androst - 2 - en - 17 - one is freed from admixed #<SP>3</SP>-isomer thereof by treatment with Jones reagent and isolation of the pure #<SP>2</SP> compound from the resultant mixture, e.g. by crystallization or chromatography. (The #<SP>3</SP>- isomer is thought to be converted to a diacid or aldehyde while the #<SP>2</SP>-isomer remains unchanged). The inventive compounds are credited with pituitary gonadotrophin-stimulating, gonadinhibiting, antitumour, contraceptive, anti-parathyroid and anti-seborrhoeic activities, and may be made up with carriers into pharmaceutical compositions for oral, parenteral, topical and rectal administration.
Patent GB-1324673-A (GB)
Title: Primary cell case
IPC: H01M50/147
Filed: 1972-01-17
Abstract: 1324673 Sealing arrangements for primary cells TIMEX CORP 17 Jan 1972 [18 Jan 1971] 2244/72 Heading H1B A button type of energy cell comprises a can 11 containing the cathode material 15 separated by separators 14, 31 from the anode material 13 in a cap 10, the skirt portion 19 of which is secured by adhesive 20 to a shoulder 16 of a flexible annular sealing grommet 12, the outer wall 17 of which is compressed between the swaged-in wall 21 of can 11 and cap 10 to seal the cell. In addition an auxiliary cap 22 may be bonded to cap 10 and can 11 to provide a further seal. Cap 10 is formed from a conductive material, i.e. a duplex stainless steel-phosphor bronze material. The anode material may be a zinc amalgam with an alkaline electrolyte such as potassium hydroxide or sodium hydroxide added to it. The cathode material may be a mixture of mercuric oxide with a small percentage of graphite. The separators may be plastics microporous membrane material. The adhesive may be a mixture of epoxy and polysulphide. The auxiliary cap 22 of plastics is pretreated in a solution of sulphuric acid and potassium dichromate with a coating of epoxy resin applied both to auxiliary cap 22 and main cap 10. Cap 22 is then pressed on to cap 10 and can 11 and allowed to cure at ambient temperature.
Patent GB-346061-A (GB)
Title: Improvements in and relating to the dielectric testing of the coupling sleeves of high-tension cables
IPC: G01R27/26
Filed: 1930-01-22
Abstract: 346,061. Capacitance measurements ; indicating faults; cable joints. FELTEN & GUILLEAUME CARLSWERK AKT.- GES., Mulheim, Cologne, Germany. Jan. 22, 1930, No. 2277. Convention date, March 4, 1929. [Classes 37 and 38 (i).] The dielectric properties of the coupling sleeves of laid or unlaid cables are tested by a comparison method which consists in connecting the test coating b of adjacent sleeves A, B, C in the ratio arms of a capacity bridge X, the cable conductors a, dielectric h and test coatings forming the comparison arms. The test coatings are insulated from the cable screws e by paper c. The test may be made by known bridge methods on one sleeve, the comparison measurement following. A signalling device, or a switch, may replace the measuring instrument in the bridge diagonal. When testing three-phase circuits all of the test coatings may be connected to the bridge and the signalling device arranged in the star point. When the test leads f<1>-f<3> are not in use for testing, they are connected to the sleeve casings. The Specification as open to inspection under Sect. 91 (3) (a) comprises the application to testing high-tension leading-in insulators. This subjectmatter does not appear in the Specification as accepted.
Patent GB-902889-A (GB)
Title: Improvements in or relating to nuclear fuel elements
Inventor: ROSTRON NORMAN
IPC: G21C3/04
Filed: 1960-01-21
Abstract: 902,889. Nuclear fuel elements. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Jan. 12, 1961 [Jan. 21, 1960], No. 2317/60. Class 39 (4). In a nuclear fuel element comprising fissile material 2 contained in a tubular sheath 3, and heat-insulating members 8, 9 spacing the fissile material from end caps 4, 5, the heatinsulating members are restrained against lateral movement against the sheath. As shown, alumina discs 8, 9 are confined in cylindrical recesses 10, 11 in the inner faces of the end caps. The fuel rod has circumferential grooves 12 into which the sheath is forced. Grooves 28, 29 contain thin rings of uranium to provide a check on edge welds 6, 7. In modifications, Figs. 2 and 3 (not shown), (a) each disc 8, 9 is replaced by a plurality of thin heat-insulating discs or (b) the discs are of stepped form so that the whole of the end cap is protected from contact with the fuel. Specification 779,408 is referred to.
Patent GB-948961-A (GB)
Title: Polymers derived from polyvinyl phenol
Inventor: PACKHAM DONALD IAN
IPC: C08F8/42
Filed: 1960-01-22
Abstract: Cross-linked polyvinyl phenols are prepared by polymerizing one or more esters of vinyl phenol in the presence of a cross-linking agent and then hydrolysing the resultant product. The ester may be that of acetic, benzoic or phenyl acetic acid, and the cross-linking agent may be divinyl benzene, divinyl toluene, divinyl naphthalene, divinyl ether or methylene-bis-acrylamide. The polymerization may be effected in benzene using as catalyst azo-bis-isobutyronitrile or a Friedel-Crafts catalyst.  In examples the hydrolysis is effected with caustic soda in aqueous dioxan.  The cross-linked polyvinyl phenols may be converted to resins having ion-exchange or chelating properties by introducing reactive groups such as nitro, amino, sulphonic acid, carboxylic acid, halogen, chloromethyl, formyl, formyl oximino, phosphoryl or diazo groups. Specification 948,962 is referred to.
Patent GB-1376601-A (GB)
Title: Microwave filters and their manufacture
IPC: H01P1/205
Filed: 1972-01-06
Abstract: 1376601 Transistor oscillators G & E BRADLEY Ltd 6 Jan 1972 [18 Jan 1971] 2427/71 Heading H3T [Also in Division H1] A comb-line filter consists of conductor posts extending into a circular cylindrical cavity. The cavity 15 is produced by drilling a bore in an aluminium block which also contain rectangular cavities 14 and 17. Two posts 23, 24, in the form of screw-threaded rods, extend into the cylindrical cavity through tapped holes 21, 22 and form a bandpass comb-line filter. The filter is coupled to a microwave generator including a transistor 29 and capacitors 30, 31 in cavity 17 (see Division H3) through aperture 19 which houses a central conductor connected to a step recovery diode located between 20 and 36 in a housing 37. The output of the filter is transmitted via cavity 14 to a waveguide of the same dimensions as the cavity attached to the face of the block. The filter is matched to the waveguide by means of an adjustable post 25 which extends through a tapped hole into the cavity 14. Alternatively, the cylindrical cavity 15 may extend to the face of the block to which a coaxial connector is attached (Fig. 7, not shown). The inner conductor of the connector extends into the cavity 15 in a direction parallel to, but displaced from, the axis of the cavity. The Specification discusses the dimensions of the filter in relation to working frequency and bandwidth. The circuit of the microwave generator is described in Specification 1,376,602.
Patent GB-457154-A (GB)
Title: A ball holder
IPC: A63B71/00
Filed: 1936-01-27
Abstract: 457,154. Holders for tennis &c. balls. WEBSTER, G. H., 42, Highcliffe Gardens, Red Bridge Lane, Ilford, Essex. Jan. 27, 1936, No. 2501. [Class 133] A holder for tennis balls, golf balls, &c. consists of a tube of indiarubber or similar material closed at the end c and having the diameter of the open end reduced, for instance by the provision of an internal ring b. Oppositely-disposed pairs of apertures d, e are provided to facilitate removal of the balls.
Patent GB-675740-A (GB)
Title: Improvements in or relating to weed killing compositions
Filed: 1951-02-01
Abstract: 675,740. Weed-killers, CHIPMAN CHEMICAL CO., Inc. Feb. 1, 1951 [Feb. 2, 1950], No..2551/51. Class 81 (i). A weed-killer consists essentially of an alkali metal chlorate and an alkali metal polyborate of the general formula M 2 O.(B 2 O 3 ) x  where is a number from 4.16 to 7. A typical mixture comprises 40 to 50 per cent of sodium chlorate and 50 to 40 per cent of sodium pentaborate. The ingredients may be co-crystallised from a common solution, preferably after evaporation thereof until the water content does not exceed the water of crystallisation requirement of the polyborate. For weed-killing the composition is dissolved in water in an amount of 1 to 2¢ lb. per gallon. For use as a defoliant it is applied at the rate of 3-8 lb. per acre. Specification 335,203, [Class 81 (i)], is referred to.
Patent GB-284269-A (GB)
Title: A method of manufacturing friction material for braking and coupling purposes
IPC: F16D69/02
Filed: 1928-01-26
Abstract: 284,269. Kirchbach'sche Werke Kirchbach & Co. Jan. 26, 1927, [Convention date]. Moulds; moulding resins. - Relates to the moulding of friction bodies for brakes or clutches from fibrous material and bakelite or other synthetic resin and consists in first subjecting the mixture, in the cold state, to a pressure of more than 3,000 atmospheres and subsequently baking. The fibrous material may consist of asbestos or woven fabric or felted textures of thin wire mixed with fibrous substances. A pressure of 5000 kg. per sq. cm. is given, the pressed articles being dried at normal temperatures for fourteen days or longer and then heated for a few hours to a temperature of 150-200‹. The material is compressed within a mould 1 furnished with stepped relief apertures 5 situated at the plane of the lower dead centre of the plunger 3.
Patent GB-843345-A (GB)
Title: Improvements in or relating to suction pumps for removing mucus and the like from human respiratory channels
IPC: F04B45/02
Filed: 1957-01-24
Abstract: 843,345. Suction bellows. RUBEN, H., and HESSE, H. Jan. 24, 1957 [March 2, 1956], No. 2628/57. Class 8(1). A hand or foot operated bellows 1 suitable for evacuating a flask 25 to which it is connected by a flexible tube 24 and having automatic suction and discharge valves 9, 8 is biassed to its fully extended position by a spring 4 which is preloaded e.g. by a chain 19 connecting upper and lower end plates 2, 3 of the bellows 1. As shown the suction and discharge valves comprise spring-biassed balls 21, 7 located in end wall 2, but in a modification the discharge valve comprises a loose disc seated above an aperture in the upper end wall whereas the suction valve comprises a loose ball located in a housing at the vacuum flask end of the tubing 24. In a further modification, the bellows and flask are mounted on a base plate on opposite sides of a carrying handle, and in a still further modification, the bellows is of the hinged type, the biassing spring being pre-loaded by an external stop.
Patent GB-553088-A (GB)
Title: Improvements in or connected with force transmission mechanism for dynamometers
IPC: G01L3/16
Filed: 1942-02-28
Abstract: 553,088. Dynamometers. ASHWORTH ROSS & CO., Ltd., and MILLS, R.A. Feb. 28, 1942, No. 2645. [Glass 106 (ii)] A force transmission mechanism has the torque  shaft or arm of the dynamometer connected to a compound lever system as described in Specication 548,369 and is provided with a balanced lever system to transmit the torque to one or other of a pair, of load indicators. As shown in Fig. 1, the torque shaft a is connected through levers b, c , links d, e, intennediate lever h and a double connecting rod j to change-over levers k, k<SP>1</SP> through either of which the load is transmitted to an indicator l: To carry out two tests simuitaneously a second torque shaft and duplicate lever system is arranged adjacent the first arrangement with a separate load indicator. The two load indicators are arranged in a, common housing m remote from the dynamometers and a balanced lever system is: provided so that the indication may be given on one or other load indicator. This lever system, Figs. 1 and 2, comprises tubular or pipe torque levers n mounted in ball bearings and provided adjacent each end with oppositely directed . crank arms n<SP>1</SP>, n<SP>2</SP> connected to rods q, q<SP>1</SP> and having a third arm n<SP>3</SP> connected by a depending link r to a balanced lever attached at its other end to a connecting rod u. The rod q is-connected to the changeover lever k, the rod q<SP>1</SP> is connected to the load indicator and the rod u is, connected to the change-over, lever k<SP>1</SP>. By this means the operator can select the lever transmission system to be coupled to one 1 or other dynamometer.
Patent GB-1099562-A (GB)
Title: Improvements in or relating to television cameras
Inventor: MATCHELL RAYMOND
IPC: H04N5/217
Filed: 1966-01-20
Abstract: 1,099,562. Television camera tube circuits. MARCONI CO. Ltd. Nov. 16, 1966 [Jan. 20, 1966], No. 2674/66. Heading H4F. In an arrangement for producing a signal to be used to cancel the dark current effect in a photo-conductive camera tube, the tube is provided with a black strip 1, either on the target or in the optical system, whereby the tube output, Fig 2(a), is caused to exhibit a black level OB, the difference between which and the level TB which is produced when the tube is blanked represents the dark current. The strip is provided in either the line and frame direction and is positioned so that the signal level OB is produced outside the camera blanking interval but within the system blanking interval. The difference in the levels TB and OB is measured by a differential amplifier circuit, Fig. 1, in which transistor 2 receives the signal, Fig. 2a, directly and transistor 3 receives the signal, Fig. 2b, after a delay in element 4 corresponding to the duration X-X of the black signal level OB. The circuit is rendered conductive by a pulse, Fig. 2c, which has a length slightly less than the duration of level OB and which commences just before commencement of signal OB. The difference, of the currents in transistors 2 and 3 produces a signal, Fig. 2d, via a transformer 5 which represents the difference of the levels TB and OB. In a modified circuit, Fig. 3 [not shown), the signals are applied to transistors 2 and 3 via rectifier circuits, that connected to transistor 2 having a large timeconstant whereby a steady potential corresponding to level TB is provided, and that connected to transistor 3 having a time constant short enough to permit the potential to follow the signal transitions.