baber/WOPTO huggingface dataset:
Patent GB-1025106-A (GB)
Title: Improvements relating to the production of thermistors
IPC: H01C7/04
Filed: 1963-10-28
Abstract: 1,025,106. Thermistors. W. R. GRACE & CO. Oct. 28, 1963 [Dec. 14, 1962], No. 42489/63. Heading H1K. A process for preparing thermistor devices comprises doping a monocrystalline high purity n-type silicon rod with between 1 and 100 parts of gold per 10<SP>9</SP> of silicon by means of a zone levelling technique. A rod of silicon having an impurity content of less than 100 parts in 10<SP>9</SP> is placed in a zone-melting apparatus together with an w-type silicon seed crystal (resistivity 10-640 ohm/cm.), a silicon phosphorus dope containing 1-4 x 10<SP>4</SP> parts of phosphorus per 10<SP>9</SP> silicon and a quantity of very high purity gold. These materials are then subjected to a zone melting process whereby a monocrystalline rod of silicon having a uniform distribution of gold (preferably 4-20 parts per 10<SP>9</SP>) therein is obtained. The rod is cut into wafers by means of a diamond saw and the resulting wafers are then etched, washed and transferred via an ammonium hydroxide bath to an electrodeless nickel-plating tank. After deposition of the nickel the wafers are heat treated at 210‹ C. for 18 hours in an argon or nitrogen atmosphere. The wafers are then diced using an ultrasonic saw and tinned copper leads are soldered to each of the dice. The edges of the dice are ground away to remove any surplus metal which may be short-circuiting the electrodes and to adjust the resistance value to be equal to that of a standard thermistor. The devices are finally painted with a white silicone enamel or with vulcanized silicone rubber.
Patent GB-890362-A (GB)
Title: Improvements in dust-laden air filters
Inventor: JAMES ERIC ARNOLD
IPC: B01D46/04
Filed: 1959-12-16
Abstract: 890,362. Air filters. ROBINSON & SON Ltd., THOMAS. Dec. 16, 1960 [Dec. 16, 1959], 42820/59. Class 8(2). In a dust-laden air filter comprising a plurality of outward flow filter sleeves C, Fig. 1, disposed in annular formation around a driven shaft j the latter carries a trip-lever m for agitating the sleeves in turn and a plate k for closing the lower end of the sleeve being agitated. The upper end of each sleeve is closed by a cap d attached to a downwardly biased pin e carried by a fixed bracket e<SP>1</SP> and the lower end of each sleeve is secured to a spigot f of a plate g which divides the filter casing into a lower dust-laden air inlet chamber h and an upper clean air chamber i. In operation engagement of a serrated edge m<SP>1</SP> of the trip lever m with one arm of a double-armed lever n, Fig. 2, associated with each sleeve and freely mounted on a pin o projecting radially inwardly from the casing wall results in the other arm of the lever n repeatedly raising and lowering the pin e to which it is pivotally connected and hence shaking of the sleeve cap d. The inner wall surface of the dust-laden air inlet chamber h is continuously wiped clean by a blade q carried by the driven-shaft j. The dust-laden air may be drawn into the apparatus by a fan s or may be forced in under pressure.
Patent GB-1448818-A (GB)
Title: Prosthetic knee joint devices
IPC: A61F2/38
Filed: 1972-09-18
Abstract: 1448818 Prosthetic knee joints NATIONAL RESEARCH DEVELOPMENT CORP 18 Sept 1973 [18 Sept 1972] 43151/72 Heading A5R An artificial knee joint comprises a femoral component, Fig. 5, having a generally concave bearing surface and a tibial component 2, Fig. 7, having a generally convex bearing surface adapted to engage the concave bearing surface, said convex bearing surface being generally saddle-shaped with a pommel 4d at one end and in longitudinal section having at least one portion which diverges from the adjacent portion of the concave member. In use the longitudinal axis of the saddle-shaped member lies along a front-to-back axis of the knee joint, the pommel 4d being located posteriorly. In a position (shown dotted bottom left of Fig. 5) to facilitate standing, the part 4a-4b of the upper surface 4 of the tibial component engages the lower surface of the femoral component between the regions 3a and 3b, in which regions the two surfaces are complementary in both longitudinal and lateral shaping, thus providing a relatively large area of contact maximising the stability of the joint. The bearing surfaces diverge from each other beyond points 3b and 4b and in a second position (dotted right Fig. 5), the pommel 4d engages the femoral member as in a ball-and-socket joint. Relative rotation in the horizontal plane is allowed in this position. The surfaces of both the femoral and the tibial components are extended into flared portions along the longitudinal side peripheries. The lower surface of said tibial component comprises two ridge portions 6b and a groove (6a) Fig. 10, (not shown), between them which extends longitudinally relative to the associated saddle shaping, the ridge portions being bridged across one end of said groove by an apertured web 6c. The femoral component may be of palstics material and the tibial component of metal, such as a chrome-cobalt alloy.
Patent GB-1326633-A (GB)
Title: Method of bonding metal surfaces
IPC: B23K35/00
Filed: 1970-09-10
Abstract: 1326633 Welding by pressure NIPPON KOKAN KK 10 Sept 1970 [30 Jan 1970] 43333/70 Heading B3R  In bonding together surfaces on which an oxidized film is liable to be formed a layer of aluminium is formed by electro-plating in a fused salt bath on each of the surfaces, the surfaces are assembled with the aluminium layers facing each other, either directly or through a separate sheet of aluminium, and heat at 500-580 C‹. and pressure at 5-20 kg./mm<SP>2</SP>. are applied to bond the surfaces. Titanium plates 1, 2 electro plated on both sides with aluminium 6 are arranged between steel plates 4 heated by electric heating wires 3 with interposed mica sheets 5 and under the pressure and heat are bonded by diffusion of the aluminium layers. Bonding may take place in an inert gas. In an example the assembly is heated at 580‹ C. for 5 mins. under 20 kg./mm<SP>2</SP>. to effect bonding and in another example pieces of mica are placed between a stack of plates to prevent bonding at predetermined areas, the bonded assembly being expanded to produce honeycomb structure. Aluminium foil previously immersed in a mixture of sulphuric acid and chromic anhydride is placed in an example, between the plates and after heating and pressing bonding occurs only where the foil is present. The plates may also be immersed in the mixture. In another cold rolled steel sheets are plated with aluminium and assembled and heated to 500‹ C. The plates may be of aluminium or aluminium alloy or titanium alloy.
Patent GB-1159370-A (GB)
Title: Cross-Linked Cellulose Ester Compositions
IPC: D01F2/28
Filed: 1966-09-28
Abstract: 1,159,370. Fibres of cross-linked cellulose esters. EASTMAN KODAK CO. 28 Sept., 1966 [28 Sept., 1965], No. 43462/66. Heading B5B. [Also in Divisions C2, C3 and D1] Filaments comprising a cellulose ester which has been cross-linked with hexa(methoxymethyl) melamine (preferably 5-50% by weight thereof) are made by dry-spinning a solution, e.g. in acetone, of the ester together with the hexa(methoxymethyl) melamine and a " blocked catalyst ", and heating the resulting filaments to release the acid component of the catalyst and cause the cross-linking reaction to occur. The " blocked catalyst " is defined as an acid cross-linking catalyst, temporarily deactivated by reaction with an epoxy compound. Specified cellulose esters are the acetate, butyrate, propionate, and mixed esters containing these groups. Exemplified as catalyst is a 1 : 1 adduct of p-toluene sulphonic acid and a commercial epoxidized triglyceride of given formula. The filaments may be crimped and the crimp heat-set concurrently with the crosslinking.
Patent GB-1210095-A (GB)
Title: Electronic control circuits
IPC: H02H7/00
Filed: 1967-10-23
Abstract: 1,210,095. Protective arrangements. EX-CELL-O CORP. 23 Oct., 1967 [18 Nov., 1966], No. 43596/67. Heading H2K. A protective arrangement for an electrochemical machining apparatus, comprises a plurality of " sensor " circuits operative to sense different electrical parameters and apply a signal to switching circuitry when a parameter enters an undesired range, the switching circuitry causing an output device to supply a control signal, e.g. to cause shutting down of the apparatus. The sensing circuits are a current increase and decrease circuit 16, Fig. 1, which is substantially that of Specification 1,207,839, a maximum current circuit 18 which is substantially that of Specification 1,204,191, a voltage short or spark-over circuit 20 which is substantially that of Specification 1,205,053, and a voltage surge circuit 22 illustrated in Fig. 3 (not shown), together with a per cent of maximum current and threshold voltage circuit 24 illustrated in Fig. 4 (not shown). Incorrect operation due to transient conditions on the power supply circuit 14 is prevented by the line transient circuit of Specification 1,210,096. The switching circuitry comprises transistor switches 276, 278, 280, 282 which under normal conditions provide a closed circuit to prevent the oscillation of a unijunction transistor oscillator 290, but which when a fault condition occurs and results in a switch in each of the parallel circuits being open, the oscillator 290 oscillates and through a pulse transformer 320 and controlled rectifier 322 effects the operation of a relay 324. " Blanking " circuits 26, 28 and other time delay circuits prevent incorrect operation during starting-up, shutting-down and due to brief transient conditions. Fig. 2 illustrates an indicating circuit which is connected by the conductors 130, 70, 68, 78 and 84 to the sensing circuits of Fig. 1. This indicating circuit has signal lamp circuits 132, 74, 72, 330 and 332 to indicate the fault causing shut-down and is arranged so that the operation of a signal lamp circuit causes clamp circuits 338, 340, 342, 344, 341 and a latchout circuit 339 to retain the operated signal lamp on and prevent the operation of any other signal lamp circuit as the apparatus is shut-down. Resetting of the indicator circuit may be effected manually by a push switch or automatically by a reset circuit 349, 343 when the apparatus is restarted. Various transistorized circuit portions are described and illustrated, Figs. 3 to 8 (not shown), Fig. 8 including means for turning off the apparatus if the main power supply fails or if the auxiliary supply for the transistors has too high or too low voltages.
Patent GB-916178-A (GB)
Title: Improvements in or relating to suspension arrangements
Inventor: BRYER ROBERT FRANK
IPC: A61B6/00
Filed: 1959-12-23
Abstract: 916,178. Suspension arrangements for X-ray tubes. GENERAL ELECTRIC CO. Ltd. Dec. 23, 1960 [Dec. 23, 1959], No. 43686/59. Class 98 (1). A suspension arrangement comprises three or more members arranged for telescopic movement of which the outermost or innermost is mounted on a fixed support and the innermost or outermost, as the case may be, is adapted to carry an apparatus; the or each intermediate member carries a rotatable driving element in engagement with the members on either side so that axial movement of one member produces a corresponding movement in all the members except the fixed one. Counter-balancing means are associated with the inner or outermost member as the case may be. In the apparatus shown, five concentric tubes 1-5 are spaced relative to each other by ball races 6. Tube 1 is attached to a fixed support (not shown) and tube 5 is attached to an X-ray tube (also not shown) and a spring counter-balance consisting of a double cable, tension-springs and snail cams are provided for tube 5. The tubes are prevented from rotating angularly relative to each other by key balls which are located in tracks running the length of the tubes. Rotatable pinions 12 are provided on tubes 2, 3, 4 which engage racks 13 attached to the tubes so that movement of one tube results in a movement of all the tubes except 1.
Patent GB-1527742-A (GB)
Title: Gas impingement and suction cleaning apparatus
IPC: G03G21/00
Filed: 1975-10-24
Abstract: 1527742 Cleaning electrophotographic surfaces XEROX CORP 24 Oct 1975 [24 Feb 1975] 43769/75 Heading B6C Residual toner is removed from electrophotographic imaging surface 13 by a gas blast through central slot 31 and suction through side slots 32 (or through lines of ports replacing the slots), the pressures, volumes and velocities and the shape of cleaning shoe 30 being so calculated that the shoe rides over the moving imaging surface on a gas pressure cushion. Peripheral ports 80 may be fed from the same manifold as the slot 31, to assist maintenance of the gas cushion. The gas blast may be ionized, or combined with a light exposure to discharge the surface 13. Brushes, scrapers and web cleaners may be used together with the cleaning shoe. The shoe may be mounted on slides and pivots, so that it can conform to the imaging surface, or may be mounted on inflatable manifold 85. When the gas cushion is not in operation the shoe is withdrawn from the imaging surface by deflation of the manifold 85. or by a spring.
Patent GB-1399930-A (GB)
Title: Alarm system
IPC: G08B17/00
Filed: 1972-09-21
Abstract: 1399930 Alarm systems SECURITON AG 21 Sept 1972 [23 Sept 1971] 43795/72 Heading G4N An alarm system comprises an alarm sensor loop 1, an alarm indication retention device 5, 6 and a control arrangement including a pressbutton switch 7 and a bi-stable multivibrator 9, an alarm output device 15 actuated when the multivibrator 9 is in a first state and an alarm condition is present and switched off when the multivibrator is in its second state and a locking device 4 to prevent the tripping of the bi-stable into its first state if an alarm condition is present when power is switched on. In the normal state, with the press-button switch 7 and the sensor contact 2 in the indicated positions, the multivibrator 9 is in its first state. If the contact 2 is now opened due to an alarm condition, an alarm relay 3 and the output device 15 are energized and kept in the energized state by device 5, 6 even if contact 2 is subsequently closed. For switching off the alarm, the switch 7 is pressed down and released with the contact 2 closed so that the multivibrator is triggered into its second state. The switch 7 has once again to be depressed for triggering the multivibrator 9 back into its first state.
Patent GB-1196657-A (GB)
Title: Process for the Manufacture of Urea from Ammonia and Carbon Dioxide
Inventor: GIOMMI GUIDO
IPC: C07C273/04
Filed: 1967-09-28
Abstract: 1,196,657. Urea. G. GIOMMI. 28 Sept., 1967, No. 44097/67. Heading C2C. A continuous process for the synthesis of urea from ammonia and carbon dioxide under elevated temperatures and pressures comprises the step of splitting the ammonium, carbonate which is not converted into urea into its components by distillation at temperatures and pressures approximately equal to synthesis pressures and temperatures in the presence of an excess quantity of gaseous ammonia, the split products being readmitted to the urea synthesis and the urea being drawn off from the distillation zone, the improvement comprising condensing the split products withdrawn from said distillation zone so as to form liquid carbamate and separating the same from said excess ammonia, returning said carbamate into the urea synthesis, recirculating said ammonia into the distillation zone, and adding at least a portion of the CO 2  used in the synthesis to the gases withdrawn from the distillation zone before their condensation. The gases withdrawn from the distillation zone may be condensed with the simultaneous addition of small quantities of water sufficient to prevent the precipitation of the condensed carbamate. The recirculated excess ammonia, which may be further compressed and separated from inert components, may be admitted to the distillation zone together with at least a part of the total ammonia charged into the synthesis. Suitable forms of apparatus for carrying out the above process are described.
Patent GB-1196334-A (GB)
Title: An Automatic Multiple-Spindle Lathe
IPC: B23B9/10
Filed: 1967-09-28
Abstract: 1,196,334. Multi-spindle lathes. WERKZEUGMASCHINENFABBIK GILDEMEISTER & COMP. A.G. 28 Sept., 1967 [5 Oct., 1966], No. 44257/67. Headings B3B and B3T. An automatic multi-spindle lathe comprises an indexable spindle drum 3 mounted in a housing 2 on the machine bed 1 and which carries rotatable work spindles 5, a longitudinal slide block 47 supported on a central tube 57, coaxial with the spindle drum and a control shaft 19 extending from the housing 2 and supported in a cantilever beam 21 above the machine bed 1. The cantilever beam has at its free end a supporting unit 51 which carries the free end of the central tube 57. Transversely operable tool slides 18, 18a are supported on the housing 2 and are actuated by cams 25 driven by a chain and sprocket drive 22, 23 from the control shaft 19. The work spindles are belt and gear driven from a motor 6 mounted on the bed 1. Means for additional driving control of the tool slides is provided from the control shaft by cams and gears to effect transverse and/or longitudinal movement. A conveyer 66 is provided in the bed 1 beneath the turret and cantilever beam 21 to facilitate the catching and removal of the cuttings produced during a machining operation.
Patent GB-1450585-A (GB)
Title: Photographic colour diffusion transfer material
IPC: G03C8/10
Filed: 1973-09-20
Abstract: 1450585 Diazonium compounds and intermediates therefor GAF CORP 20 Sept 1973 [2 Oct 1972] 44273/73 Heading C2C [Also in Division G2] 2 - Morpholino - 5 - nitrobenzoic acid is prepared by refluxing 2-chloro-5-nitrobenzoic acid and morpholine, pouring into ice water and acidifying. 5-Amino-2-morpholinobenzoic acid is prepared by reducing the above nitro compound. 3 - Carboxy - 4 - morpholinobenzenediazonium fluoborate is prepared by diazotizing the above amine. 5-Nitro-2-(1-pyrrolidinyl)benzoic acid, and 2 - pyrrolidinyl - 5 - nitrobenzenesulphonic acid are prepared similarly to the above nitro compound. 5-Amino-2- (1-pyrrolidinyl)benzoic acid, 2 - pyrrolidinyl - 5 - aminobenzenesulphonic acid, 5 - amino - 2 - piperidinobenzoic acid, p - aminosuccinanilic acid, and sodium 2 - [methyl - (2 - sulphoethyl)amino] - 5 - aminobenzenesulphonate are prepared similarly to the above amine. 3-Carboxy-4-(1-pyrrolidinyl) benzenediazonium fluoborate, 4 - (1 - pyrrolidinyl) 3 - sulphobenzenediazonium inner salt, 3- carboxy - 4 - piperidinobenzenediazonium fluoborate, 4 - (3 - carboxypropionamido)benzenediazonium hexafluoroarsenate and sodium 4 - [methyl - (2 - sulphoethyl)amino] - 3 - sulphobenzenediazonium inner salt are prepared similarly to the above diazonium compound. 4 - Ethyl - (2 - sulphoethyl)amino] - o - toluene diazonium inner salt is prepared by diazotizing 4 - amino - N - ethyl - 3 - methyl - N - (#- sulphoethyl)aniline in ethanol with n-butyl nitrite. 5-Phenylsulphonylazo-2-(1-pyrrolidinyl) benzoic acid is prepared by diazotizing a solution containing 5-nitro-2-pyrrolidinylbenzoic acid, water, formic acid and concentrated HCl with sodium nitrite and destroying excess nitrite with sulphamic acid and adding aqueous sodium benzenesulphinate. Sodium 4-dodecyloxybenzene sulphinate is prepared by refluxing 4-dodecyloxybenzenesulphonyl chloride, ether, water and zinc dust, treating the filter cake obtained with aqueous sodium carbonate, boiling and cooling the filtrate. N-[p-(pdodecyloxyphenyl - sulphonylazo)phenyl]succinamic acid is prepared by adding 4-(3-carboxypropionamido)benzenediazonium hexafluoroarsenate in water and ethanol to the above sulphinate in water, ethanol and methanol.
Patent GB-1524067-A (GB)
Title: Electric recording process and electrode for use therein
IPC: G03G17/02
Filed: 1975-10-29
Abstract: 1524067 Colour-forming recording process MITA INDUSTRIAL CO Ltd 29 Oct 1975 [1 Nov 1974] 44727/75 Heading B6 [Also in Divisions C7 and D2] An electrode for use in electric recording processes where a colour-forming agent in a recording layer reacts with cations released from the electrode under passage of a current is charaterized by an ionic conductivity of at least 1 Î 10<SP>-4</SP>#<SP>-1</SP>cm.<SP>-1</SP> and is in the form of a solid electrolyte of a metal of Group Ib. Preferred electrolytes are halides or chalcogenides, and solid solutions with other salts, e.g. Ag 3 - SBr 3 , Ag 3 SI, Ag 7 I 4 PO 4 , Ag 19 I 15 P 2 O 7 , Ag 6 I 4 WO 4 , Ag 2 Te 0À2 S 0À8 , Ag 2 HgI 4  or Cu 2 HgI 4 . The electrode is used as the anode in the recording process, it can be in the form of a pen or a scanning needle, or in the form of a type character; alternatively the electrode of the invention serves as the anode in the form of a support, e.g. a drum for the recording layer utilized with e.g. a scanning metal cathode. The required conductivity characteristics may only be available at temperatures above the transition temperature, up to a limit of 200‹ C. It is stated that the electrode takes part in ionic conduction rather than ionic reaction and can be regenerated by contacting the electrode with the Group Ib metal and applying a current. If the electrode is permanently in contact with a metal substrate, e.g. forms a composite electrode structure, then regeneration is not required, there being a continuous flow of ions in the required direction.
Patent GB-1213959-A (GB)
Title: High-speed gas-bearing structures
IPC: F16C32/06
Filed: 1969-09-10
Abstract: 1,213,959. Bearings. TOYODA KOKI K.K. 10 Sept., 1969 [17 Sept., 1968], No. 44748/69. Heading F2A. A fluid bearing is provided with means to detect the number of revolutions of a shaft, a control circuit responsive to the output of the detecting means to produce an output signal when the number of revolutions of the shaft reaches a sub-stable region beyond the first resonance point as shown in Fig. 2, and a control valve responsive to said output signal to reduce the pressure of the gas supplied from an external source. In an embodiment a shaft 5, Fig. 3, is supported radially and axially by means of gas supplied to openings 6 and 7 respectively formed in a member 3. The openings 6 connect to a radial passage 9. The passages 8, 9 connect to connect to an inlet passage 12 in a body 1, via radial passages 10 therein. The number of revolutions of the shaft is detected by means of a photo-electric detector 20, Fig. 5, which receives light reflected from the periphery of the shaft, the latter having dark portions 5b thereon. The detector is connected to a digital-analogue converter 22, Fig. 6, the output of which is supplied to a Schmidt circuit 24 through an amplifier 23 so that, when the output voltage from the amplifier reaches a pre-determined level, the unit 24 provides an output signal which energizes a relay 40 to actuate a valve 13 and decrease the amount of gas supplied from a source 14.
Patent GB-1367179-A (GB)
Title: Central heating
IPC: F24H9/12
Filed: 1972-09-30
Abstract: 1367179 Central heating FELLINGSBRO VERKSTADER AB 24 Nov 1972 [30 Sept 1972] 45241/72 Heading F4U [Also in Division F2] A device for connecting a radiator R to a control valve 1 in the main flow pipe L of a onepipe central heating system comprises a tubular body 2 which extends into the flow space of the radiator and in which is secured a twisted partition 3 for providing a spiral motion of the hot water flowing through the body 2.