baber/WOPTO huggingface dataset:
Patent GB-575340-A (GB)
Title: Improvements in or relating to variable resistances for controlling electrical potential
IPC: H01C1/01
Filed: 1944-03-10
Abstract: 575,340. Variable contact resistances. MILLER, G. L. March 10, 1944, No. 4452. [Class 37] In a wirewound variable resistance, the ceramic coil former is held in position on a baseplate by holders engaging it at the edge remote from the base, the holders being adjustable and capable of being clamped in position when adjusted. The baseplate 1, Figs. 1, 2, 6, is formed of moulded material, with fixing lugs 3 and a raised transverse portion 4. The ceramic coil former 6 carries two windings 18 on opposite sides, which terminate at holes 19 in the former 6, and are prevented from movement by suitable shaping of the blank portion 27 of the former 6. The latter rests upon ceramic insulating studs 28 inset in the base 1, and is held in position by holders 7. These, Fig. 5, comprise a clip portion 9 fitting over the former 6, a shank 8 and a slotted tag piece 10 which is clamped to the projecting portion 4 of the base 1 by screws 12, Figs. 1, 6, which thread into inserts 13. The ends of the windings 18 adjacent to the clips 9 are attached thereto, an extended portion 15 of the holder 7 making connexion with metal inserts 17 which carry screws 22 and form the external terminals. An additional unconnected insert and screw 21, Fig. 1, is provided as a " looping-in " terminal, the leads being brought in through a duct 25 moulded in the base 1, and protected by a cover-plate 24. Moulded into the base 1 is the pillar 30 which locates the rotatable member 31. The latter is of moulded material, and integral with the cover 32, and is held in position by the slotted collar 33 and pin 34 passing through a hole in the pillar 30. The contact member 35 has contact arms 36, Fig. 4, bearing on the windings 18, and an annular portion provided with holes 37 which engage with stud portions 38, Fig. 6, moulded into the member 31. Rotation of this member is limited by the projecting stop portion 39 which engages with a corresponding projection 5 formed in the base 1, and the apparatus is sealed by a rubber ring 40 which also serves to prevent movement of the cover 32 under vibration. The apparatus may be modified, Fig. 8 (not shown), to provide ready interchangeability of units, by extending the inserts 21 as plug members, or may be modified, Fig. 9 (not shown), to permit of mounting behind an operating panel.
Patent GB-953763-A (GB)
Title: Improvements in and relating to the production of unsaturated aliphatic acids
Inventor: BROWN CHRISTOPHER JOHN
IPC: C07C57/07
Filed: 1962-02-06
Abstract: In a process for the preparation of acrylic acid by reacting at an elevated temperature in the vapour phase, acrolein or a compound which gives rise to acrolein under the reaction conditions, and oxygen in the presence of an oxidation catalyst, the gaseous reaction mixture leaving the reactor at below 100 DEG C. is quenched by contact with cooled liquid acrylic acid to reduce the undesirable polymerization of the acrylic acid manomer.  The contact with the acrylic acid which may be pure or in an aqueons solution may be by counter-or co-current flow through a packed zone wherein the reaction gases are condensed and absorbed in the quenching liquid. The quenching liquid may contain polymerization inhibitors e.g. hydroquinone or methylene blue. Acrylic acid may be finally recovered by esterification, salt formation or solvent extraction followed by fractional distillation.
Patent GB-1028340-A (GB)
Title: Resilient attachment, more particularly for motor vehicle suspension units including helical metal springs and shock absorbers coaxial with the springs
IPC: B60G15/06
Filed: 1963-02-04
Abstract: 1,028,340. Resilient mountings. SOC. APPLICAZIONE GOMMA ANTIVIBRANTI " S.A.G.A." S.p.A. Feb. 4, 1963 [Aug. 9, 1962], No. 4498/63. Heading F2S. In means for attaching a suspension unit, comprising a coiled metal spring 4 and a shock - absorber 5 coaxial within it, e.g. to the unsprung part of a vehicle a metal separator ring 3 in a resilient unit 1, including a pair of annular elastomeric rings 2 having radial ribs 9, is connected to a metal collar 8 to which a metal eye 6 of the shock-absorber 5 is secured by a pin 7, the upper face of the upper ring 2 being recessed to centre the spring 4 and the underface of the lower ring 2 being bonded to an annular attachment plate. The resilient unit is pre-compressed by means of U-shaped straps 20, which alternatively may be located on the outside of the unit 1. In a modification, Fig. 9 (not shown), bolts 13 connected between upper and lower plates 11, 14 pre-compress the elastomeric rings 2, 2, the inner peripheral edge of the separator ring 3 being sandwiched between a pair of rubber rings 17, 18 clamped between collars 19, 22 on a shock-absorber pin 18 by a nut 15. A greater number of rings 2 and washers 3 may be provided, the number of rings 17, 18 being increased in accordance with the increase in the number of separator rings 3.
Patent GB-498435-A (GB)
Title: Electrostatic microphone system
IPC: H04R19/04
Filed: 1938-02-14
Abstract: 498,435. Microphone systems. REISZ, E. Feb. 14, 1938, No. 4544. [Class 40 (iv)] In an electrostatic microphone system in which condenser microphones of different sizes and having different frequency-response characteristics deliver their audio-frequency outputs in parallel to an output impedance coupled to the input circuit of an amplifier, an ohmic resistance in series with the microphone having the lower frequency response characteristics serves to reduce the amplitude of response at resonance frequency substantially to the level of the amplitude of response to other frequencies. The condenser microphones G1, M1, a and G2, M2, a, responsive to low and high frequencies respectively, are connected in parallel to the primary winding p of a transformer having a blocking condenser C1 to prevent the discharge of the microphones. The circuit including the microphone capacities and the inductance of the primary winding p has a resonant frequency less than 50 cycles per sec. The secondary winding s has a number of turns corresponding to the characteristic of the line L and is connected at the point b to a condenser C2 and a battery B from which biassing potential is applied to the microphones through a resistance R. The resistance r included in the circuit of the microphone G1, M], a, reduces the amplitude of response at the resonance frequency, and up to frequencies at which r can be neglected current variations are supplied from the low-frequency microphone. At higher frequencies with the increased effect of the resistance r, current changes are mainly provided by the high-frequency microphone G2, M2, a. The battery B is connected to the centre point of the winding of the input transformer A, whilst the sheathing E. of the cable and the casing G of the microphone are earthed. The microphones G1, M1 and G2, M2 together with the transformer T are combined to form a unitary structure with the casing G.
Patent GB-475763-A (GB)
Title: Improvements in or relating to electric discharge apparatus
IPC: H01J1/00
Filed: 1937-02-15
Abstract: 475,763. Discharge apparatus. SIEMENS & HALSKE AKT.-GES. Feb. 15, 1937, Nos. 4555 and 4556. Convention dates, Feb. 14, 1936 and Sept. 12, 1936. [Class 39 (i)] A cathode consists of an emitting layer of alkali or alkaline earth metal on a carrier of granular form having a heat conductivity less than that of nickel and itself carried on a metallic part. The carrier may comprise a semi-conductor, such as the carbide, boride, nitride or silicide of tungsten or titanium or silicon boride or silicon carbide. The envelope may be of iron and the bottom and possibly the sides and top may be lined with pulverized silicon carbide secured thereto by an enamel or by a wire net or a perforated sheet of glass, quartz or porcelain or by bars of silicon carbide. Potassium or sodium is distilled onto the pulverized carbide. The tube may be filled with argon at a pressure of from 0À01 to 30 mms. preferably from 5 to 10 mms. The cathode may be air, oil or water-cooled and may extend into the envelope from the bottom. In one form, as shown, the activated carbide layer 25 is retained by nets 34, 35 on the cathode member 37 which is water-cooled and on the container 21 which has a cooling jacket 38. A number of anodes 36 are provided.
Patent GB-511067-A (GB)
Title: Improvements in electric resistance switches
IPC: H01C1/125
Filed: 1938-02-14
Abstract: 511.067. Mercury switches. WALTURDAW CINEMA SUPPLY CO., Ltd., and STUBBS, G. E. Feb. 14, 1938, No. 4577. [Class 38 (v)] A switch for cutting resistance in or out in steps has a number of contacts arranged in pairs, the movement of mercury successively making or breaking the circuit between the members of each pair. L-shaped contact members 1 are sealed in pairs into an evacuated glass vessel 2, and one member of each pair has a leg projecting through one side of the vessel 2 which is connected to a tapping point of a resistance 4, and the other member has a leg projecting through the other side of the vessel 2 which is connected to a common lead 3. Tilting of the tube 2 causes mercury to flow from a bulb 5 and connect in turn downwardly pointing legs of each pair of contacts 1. Alternatively the mercury may be moved by a plunger, or by the vertical movement of a reservoir containing mercury connected by a flexible tube to the tube 2. In a modification, the L-shaped contacts may be threaded on a rod and insulated from the rod and each other, and connection made by relative vertical movement between a trough containing mercury or mercury amalgam, the downwardly projecting legs of the contacts being of different lengths to give a progressive action.
Patent GB-1207083-A (GB)
Title: Laser constructions
Inventor: SNITZER ELIAS
IPC: H01S3/06
Filed: 1969-01-28
Abstract: 1,207,083. Laser glass compositions. AMERICAN OPTICAL CORP. 28 Jan., 1969 [30 April, 1968], No. 4668/69. Heading C1M. [Also in Divisions C4 and H1] A laser comprises a glass laser rod 12 containing trivalent erbium as an active laser ion and producing a 1À5 micron output, the rod having a cladding 14 containing trivalent praseodymium which is transparent to the optical pumping energy but absorbs off-axis spontaneous emission of the output wavelength. The glass rod may additionally include neodymium and/or ytterbium ions as pump ions. A suitable laser glass composition consists, by weight, of 15% ytterbium oxide, 0.25% erbium oxide, 70.64% silicon oxide, 7.58% sodium oxide, 11À47% potassium oxide, 5À05% barium oxide, 1À05% antimony, 1.58% aluminium oxide, 1.58% zinc oxide and 1.05% lithium oxide. With this glass composition the pump ion concentration may be 0À1 to 60% by weight and the laser ion=0.001% to 20% by weight. Where neodymium oxide is used in addition its amount should preferably match the erbium concentration. The praseodymiumcontaining cladding may be a clear glass or a plastics material. The glass composition used as a host material may be the same as that used for the laser rod, or alternatively an epoxy resin or a chelate material may contain the trivalent praseodymium. A specific example of a cladding glass consists, by weight, of 12.39% zinc oxide, 7.13% aluminium oxide, 8À5% lanthanum oxide, 67.98% phosphoric oxide and 4.0% praseodymium oxide. A liquid cladding may alternatively be used such as an aqueous solution of 0.1 to 30% by weight of praseodymium chloride. In all cases the refractive index of the cladding material should differ by no more than 0.002 from the refractive index of the laser rod. Other inorganic glasses used as host materials for the laser and pump ions are disclosed, including silicates, phosphates, borates, arsenic trisulphides, selenides, tellurides, fluorides, oxifluorides, alumino-silicates, germanates and sulphur containing glasses Reference has been directed by the Comptroller. to Specification 1,138,338.
Patent GB-1206925-A (GB)
Title: Object identification system
Inventor: SAKURAGI JOHJI
IPC: B61L25/04
Filed: 1969-01-29
Abstract: 1,206,925. Track apparatus. TOKYO SHIBAURA ELECTRIC CO. Ltd. 29 Jan., 1969 [3 Feb., 1968; 28 Dec., 1968], No. 4835/69. Heading B7N. [Also in Division H4] In an interrogator-responder system for identifying passing objects such as freight cars, the interrogator includes a frequency-sweep oscillator 35 whose output is amplified at 36 and supplied to a transmitting and receiving coil 37, the amplifier 36 having a high impedance output circuit. The responder 31 carried by the object receives the interrogating signal via a coil 32 whereby resonance elements 15 1  to 15 n  are caused to resonate in succession at selected frequencies within the frequency range of the oscillator 35. This is equivalent to the insertion of an impedance Z b  in series with the coil 37 in which the reactance varies sharply at the resonance frequency points of the devices 15 1  to 15 n  with a consequent phase variation of the voltage across the coil. This voltage is supplied to a phase detector 38 and compared with a reference signal from the oscillator 35, a phase shifter 39 being adjusted so that the two inputs to the phase detector are in quadrature when there is no coupling between coils 32, 37. The output of detector 38 is supplied via a low phase filter 40 and amplifier 41 to a Schmitt circuit 42 where it is shaped into a pulse for application to an indicator. In a modification Fig. 12 (not shown), the resonance elements 15 1  &c. are divided into three groups covering different frequency bands and three sweep oscillators generate interrogating signals corresponding to the respective groups, the response signals being supplied to three phase detectors co-operating respectively with the three oscillators.
Patent GB-1508754-A (GB)
Title: Stress crack resistant polycarbonate compositions
IPC: C08L23/08
Filed: 1977-02-07
Abstract: 1508754 Polycarbonate compositions MOBAY CHEMICAL CORP 7 Feb 1977 [9 Feb 1976] 4892/77 Heading C3R A composition comprises a polycarbonate and from 0À25 to 0À75% by weight, based on the polycarbonate, of an ethylene-vinyl acetate copolymer having a melt index of from 1À2 to 350. The polycarbonate is preferably derived from bisphenol A.
Patent GB-311468-A (GB)
Title: Process for the purification of alcohols obtained by the catalysed interaction of hydrogen with the oxides of carbon
IPC: A24F13/16
Filed: 1928-02-16
Abstract: 311,468. Carpmael, A., (I. G. Farbenindustrie Akt.-Ges.). Feb. 16, 1928. Methyl alcohol; isobutyl alcohol; alcohols in general. - Alcohols such as methyl or isobutyl alcohol which have been prepared by the catalytic interaction of hydrogen with the oxides of carbon are purified by treating them, or their distillation fractions, with an oxidizing agent. With this treatment there may be combined, according to circumstances, treatment with a relatively non- volatile alkali or organic base, with a metal halide other than an alkali halide, and/or with a purifying agent acting by adsorption. Thus, in treating especially impure products, it is preferred to add small amounts of an organic base such as phenylene or toluylene diamine, aminophenols, or phenylhydrazine to the product after treatment with the oxidizing agent. Also, when the raw product contains ammonia or relatively volatile organic bases, it is preferred to fix these by addition of a metal halide such as zinc chloride before distillation. The product to be purified may be diluted with water before or during distillation, and during the distillation additions of other purifying agents such as caustic soda solution, sodium bisulphite, or oxalic acid may be made. The amount of oxidizing agent employed may be only a fraction of that theoretically necessary. An example is given describing the purification of synthetic methanol by treatment with potassium permanganate followed by fractionation; reference is made also to the use of hydrogen peroxide, persulphates, perborates, percarbonates, and hypohalites.
Patent GB-163476-A (GB)
Title: Improvements relating to belts for overcoats and the like
IPC: A41F9/00
Filed: 1920-02-19
Abstract: 163,476. Young, K. B. Feb. 19, 1920. Overcoats and like garments; belts.-Overcoats and like garments provided with slits for the passage of a belt are fitted with belts in two parts D', D' attached at their inner ends respectively to cranked swivel bars C'. Fig. 5, secured inside the garment adjacent to the slits, so that the belt may be worn outside the garment all round, outside at the back only, or entirely inside the garment, as shown respectively in Figs. 1<A> 2A, 3<A>, the belt in each case being passed through other cranked bars C mounted on the same axis as the bars C<1>. The arrangement is stated to be applicable also to the waist-belts of riding-breeches, trcusers, and skirts.
Patent GB-1320183-A (GB)
Title: Cyclic carboxylic acid derivatives
IPC: C07C57/34
Filed: 1970-05-14
Abstract: 1320183 Cyclic carboxylic acid derivatives TAKEDA YAKUHIN KOGYO KK 14 May 1970 [14 May 1969 25 Dec 1969 26 Dec 1969 18 April 1970 (2)] 4999/73 Divided out of 1320181 Heading C2C Novel compounds Ib in which R 1  is 1-6 C alkyl or 3-6 C cycloalkyl; R 2 <SP>1</SP> is OH or alkoxyl; R 3 <SP>1</SP> is 1-4 C alkyl, X is halogen and n is 2 or 3 and their pharmaceutically acceptable salts are prepared by (1) alkylating a corresponding compound in which R 3 <SP>1</SP> is H, or (2) reducing a compound IVb in which R 4  is H or halogen to give a compound Ib if R 4  is halogen or to give a compound Ib where X is replaced by H when subsequent halogenation is necessary. Compounds IVb are described and claimed in copending Specification 1,320,182. Compounds Ib where R 3 <SP>1</SP> is H and compounds Ib where X is replaced by H are described in Specification 1320181. Pharmaceutical compositions for oral or parenteral administration comprise a compound Ib together with a suitable excipient and are useful as analgesics, antipyretics, anti-inflammatory agents and antirheumatic agents.
Patent GB-333549-A (GB)
Title: Improvements in or relating to repair devices for tyre casings
IPC: B29C73/06
Filed: 1929-02-14
Abstract: 333,549. Wesseler, W. J. Feb. 14, 19219. Pneumatic tyres repairing.-A tyre casing repair plug 1, Fig. 1, formed of rubber and hav ing a head section 2 and an elastic stem section 3, is engaged within a tubular member 4 so that the stem section 3 is elongated and narrowed. The tapered portion 5 is adapted to act expansively on the walls of the puncture aperture. After passing through a puncture aperture, from the inside outwards, the tubular member 4 is removed so that the stem is released into sealing engagement by reason of its own elasticity. In a modified form, Figs. 3 and 5, the head section of the plug is provided with an annular recess 14, and the inserting member 15 is formed by two complementary sections of semi-circular cross section. The upper ends of said sections are provided with aligned perforations 21 through which a wire 22 is engaged. Adjacent the upper tapered portion of the sections, an inwardly projecting prong 16 is arranged to engage with the material of the plug stem 13. The lower ends of the sections are received within the annular recess 14 and when these are drawn through the puncture aperture they spring apart to release the plug stem 13 into engagement with the walls of the aperture.
Patent GB-1036262-A (GB)
Title: Improvements in or relating to intercommunication systems
Inventor: GEORGE ROGER GEOFFREY
IPC: H04Q11/04
Filed: 1965-02-05
Abstract: 1,036,262. Interconnection systems. STANDARD TELEPHONES & CABLES Ltd. Feb. 5, 1965, No. 5094/65. Heading H4K. In an interconnection system subscriber subsets are connected directly to a common highway and communicate in a time division multiplex manner, each time slot being allocated to one subscriber and a connection being made by adjusting the calling subset equipment to transmit and receive in the time slot of the wanted subscriber. The multiplex pulses may be modulated by amplitude, or width or comprise pulse codes. In a first embodiment the highway comprises a coaxial cable or balanced pair with the subsets tapped along its length and the ends terminated with matched impedances. Each subset may be connected over a balanced circuit or be provided with a multiplex pulse position having separate go and return portions. A signal generator supplies the highway with a synchronizing pulse followed by the channel pulses in each exchange cycle. Alternatively the pulse generator may provide only the synchronizing pulse which triggers the subsets into the production of their associated channel pulses. In this arrangement the channel pulses of idle subsets may be of reduced width so as to reduce the length of the exchange cycle. In a second embodiment separate go and return highways are provided with separate arrangements for producing the channel pulses on each highway. The subsets require separate facilities for transmission and reception and may be connected into the highways as repeaters. An arrangement of the subscriber's set is shown in Fig. 4 in which a circuit SS identifies a synchronizing pulse to reset a binary counter BC, the counter being stepped by the channel pulses on the highway. When the channel pulse associated with the subset is reached the counter opens a gate AG to connect the transmitter TD and receiver RD to the highway. To call a wanted subscriber a dial or pushbutton device is operated to cause the counter BC to open gate AG in the wanted subscriber's pulse position. A tone signal generator transmits intermittently to call the wanted subscriber, some of its signal being fed back through the call set to indicate that the signal is being received. A calling signal outside the audio range can be employed to trigger a buzzer at the called set. Once a wanted pulse position has been selected the calling condition is subjected to a delay so that any conversation on the channel blocks transmission from the calling set and produces a busy signal.
Patent GB-175983-A (GB)
Title: Improvements in gas producer stoves for heating and cooking
IPC: C10J3/00
Filed: 1922-02-21
Abstract: 175,983. Br³nner Geb., Ges., (Assignees of Urbasch, O.). Feb. 22, 1921, [Convention date]. Closed solid-fuel stoves; cooking stoves ; air supply for combustion.-A stove for heating and cooking comprises a very small gas-producer having a forced air supply, the gas being burnt immediately it leaves the producer. The form shown comprises a shaft o of about 100-150 mm. high and 60 mm. diameter having a hollow grate a to which water is supplied from a reservoir h under pressure produced by an air-pump d. The resulting steam, together with air drawn in at the injector apparatus b, c is further heated in an annular jacket n and supplied beneath the grate a. The gas is lit at the mouth of the producer and heats the cooking-vessel m. The fuel consists of charcoal, 'which is moistened with methylated spirit when lighting up. In a modification for use with fuels giving off objectionable gases, a combustion chamber. having a secondary air' supply and a connection to a chimneyis arranged over the top of the producer, the cooking vessel being supported on it; water is supplied by gravity from an annular tank surrounding the producer and converted into steam in a vertical tube passing through the fuel. In a further modification, a down-draught producer is employed, the combustion chamber in which the producer gas is burnt being arranged at one side.