baber/WOPTO huggingface dataset:
Patent GB-1523056-A (GB)
Title: Heterogeneous semiconductor structure with composition gradient and method for producing same
IPC: H01L21/205
Filed: 1976-08-09
Abstract: 1523056 Semiconductor devices GOSUDARST N I I PROEKT INST REDKUMETALLICHE PROMYSHLEN GIREDMET 9 Aug 1976 33012/76 Heading H1K A heterogeneous structure, e.g. for use in lasers and photoelectric cells comprises a monocrystalline substrate, a main semiconductor layer consisting of a doped solid solution AB x C 1-x (0#x#1) of the binary compounds AB and AC, the value of x decreasing monotonically along an axis extending between opposite side surfaces of the layer, and disposed between the main layer and substrate a doped transition layer of the same solid solution through the thickness of which x varies from the value in the adjacent part of the main layer to a constant value adjacent the substrate providing the optimum lattice constant matching therewith. Such a structure is formed by a gas transport reaction or evaporation of the compounds to the substrate from a source consisting of parallel strips of discretely different compositions disposed parallel and in close proximity thereto. The transition layer is formed by deposition while moving the source slowly into a position in register with the substrate along a path normal to the strips, and the main layer by continuing deposition with the strips in register. An additional layer of the same composition as the lower face of the transition layer may be deposited between it and the substrate from a further strip of the source. The relationship between source-substrate spacing and strip width is preferably such that lateral diffusion in the source-substrate gap causes the composition gradient in the layers to be continuous. The use of solid solutions consisting of pairs of binary A III B V , A II B VI  or A IV B VI  compounds in conjunction with substrates of such binary compounds, germanium, sapphire, beryllia or magnesia is suggested, the minimum transition layer thickness depending on the degree of lattice mismztch between main layer and substrate. Methods of making structures with main layers of GaAs x P 1-x , InAs x P 1-x , CdS x Se 1-x  and Pb x Sn 1-x Te for incorporation in PN junction lasers or photocells for various wavelength bands, the wavelength of emission or peak photosensitivity of which are adjustable within a band, are described in detail. A pressure sensor sensitive over a wide range of pressures is formed on a (111) AsŒ3<SP>1</SP> oriented semi insulating GaAs substrate by depositing a GaAs additional layer, a graded GaAs x P 1-x  semi insulating transition layer doped with Fe and Te, and a Te doped main layer of the composition shown, to opposite ends of which gold wires are attached by In-Sn solder. The source in this case has separate sets of iron doped and iron free strips for production of the transition and main layers, incorporation of iron in the latter from the iron doped strips and a source of iron in the reaction tube being avoided by reversal of the gas flow after the transition layer has been deposited.
Patent GB-1342229-A (GB)
Title: Organopolysiloxane compositions for release coating of paper  and preparation of such coating
IPC: C08K5/29
Filed: 1972-07-14
Abstract: 1342229 Organopolysiloxane adhesive coating compositions BAYER AG 14 July 1972 [16 July 1971] 33095/72 Heading C3T An adhesive coating on a cellulosic material is obtained by dissolving (A) 100 p.b.w. of an α,# - dihydroxy - polydimethylsiloxane of viscosity 10<SP>5</SP>-5 Î 10<SP>7</SP> ep./20‹C., (B) 8-20 p.b.w. of an alkyl, alkenyl or phenyl triacetoxysilane, and (C) 0À9-1À1 p.b.w. of a heavy metal or dialkyl tin carboxylate in a 6:1 to 9:1 mixture by weight of an aromatic hydrocarbon and an aliphatic ketone, and mixing therewith immediately before application to the substrate, (D) 6-35 p.b.w. of an organic di- or polyisocyanate, dissolved in an aromatic hydrocarbon, the coated substrate then being heated to 80-120‹ C., and optionally thereafter being steam-treated. In examples, 100 p.b.w. of polydimethylsiloxane diol of 10<SP>7</SP> cp. at 20‹ C. is mixed with 790 p.b.w. toluene, 95 p.b.w. MEK, 14 p.b.w. vinyl triacetoxysilane and 1 p.b.w. dibutyltin dilaurate; to 100 p.b.w. of this solution are added 9 p.b.w. of a mixture of 62 p.b.w. toluene and 28 p.b.w. of toluene diisocyanate or the reaction product of 3 mols. thereof with 1 mol. of trimethylolpropane or of 3 mols. of hexamethylene diisocyanate with 1 mol. of water (N,N<SP>1</SP>,N<SP>11</SP>-tris-(6-isocyanatohexamethylene) biuret) and the mixture is applied to paper, cured at 120‹ C. and optionally steam treated.
Patent GB-988357-A (GB)
Title: Improvements in or relating to temperature control apparatus
Inventor: COLLINS JACK BERTRAM
IPC: G05D23/24
Filed: 1960-09-27
Abstract: 988,357. Automatic temperature control systems. GRAVINER MANUFACTURING CO. Ltd., and WILKINSON SWORD Ltd. Sept. 21,1961 [Sept.27, 1960], No. 33212/60. Heading G3R. An automatic temperature control system comprises a plurality of heaters, each heater being controlled by a circuit as shown in the Figure wherein the heater is switched on or off by a relay RC according to whether or not a bridge RB is out of, or in balance, the bridge RB including a temperature sensing device, such as a thermistor, connected between terminals 10, which device is sensitive to the temperature of the heater, a further voltage which is adjustable either in phase or magnitude and common to all the heater control circuits being introduced at terminals 11 so as to be in series with the output of all the bridges RB, such that the operating temperatures of all the heaters can be adjusted simultaneously by means of a single control member.
Patent GB-1071159-A (GB)
Title: A method of oxidizing the surface of silicon semiconductor bodies
IPC: C23C8/36
Filed: 1964-08-14
Abstract: The surface of a silicon body, which may contain one or more PN junctions, is provided with a protective oxide coating by exposure to oxygen ions produced by electrical discharge in a gas.  The discharge may take the form of a D.C. discharge, A.C. discharge, H.F. plasma, or the ions may be a stream of positive rays.  An initial cleansing of the silicon surface may be carried out by bombardment with ions of an inert gas such as argon, through the oxygen ion bombardment itself produces a cleaning action. In the embodiment described two silicon electrodes are set in the walls of a glass vessel.  The vessel is provided with an oxygen inlet and an outlet to a vacuum pump so that the oxygen pressure may be readily controlled and impurities swept from the apparatus.  The silicon wafer is placed with one of its major faces in contact with a silicon masking plate which rests on one of the electrodes. A second masking plate is placed on the other major face of the wafer so that only the wafer's tapered edge is exposed.  A discharge is struck between the two electrodes and the oxidation carried out in two stages.  In the first stage the applied voltage is about 500 v. and the discharge current is maintained at about 2 mA. by regulation of the gas pressure.  In the second stage the applied voltage is increased, within the range 500-600 v., and the current again held constant by gas pressure regulation, this time at about 10 mA.
Patent GB-662627-A (GB)
Title: Improvements in or relating to the sharpening or pointing of bristles, hairs, and hair-like bodies and structures
IPC: A46D9/00
Filed: 1949-12-29
Abstract: 662,627. Pointing bristles by grinding. VILLAZON, R. C. G., and VEGA, E. P. Dec. 29, 1949 [Jan. 26, 1949; Jan. 27, 1949], Nos. 33234/49 and 33235/49. Class 60 A method of sharpening or pointing hairs, bristles or the like comprises subjecting the members to a combined action of pressure and restrained dragging between a rotating abrasive surface 16 and a band 17 of elastic material which moves tangentially to, and partly in contact with, the said surface. The surface 16 is in the form of abrasive material on a roller rotatably mounted in a frame 14, and the elastic band 17 is guided around rollers 18, 19, 20, 21, of which the latter three are carried at the ends of arms 23, 24, 25. The arm 25 is supported by shock absorbers 27 and the tension of the band is adjustable by a set-screw 28 co-operating with the arms 24, 25. The hairs to be pointed are clamped between strips 12, 12<SP>1</SP> of elastic material on two jaws 4, 5, the jaws 5 being pivoted on the jaw 4 and movable to clamping position against a spring 6 by a cam lever 7. The clamping unit is adapted to be moved to and from the sharpening device by means of a slide 29 and lever 30 operable mechanically or manually, and the roller 16 may be driven by an electric motor.
Patent GB-405087-A (GB)
Title: Improvements in or relating to travelling excavating machines
IPC: E02F5/10
Filed: 1932-11-24
Abstract: 405,087. Excavators. KEARNEY, A. R., 136, Kenley Road, Merton Park, FARROW; H., and HOWKINS, F., Bank Buildings, Russell Parade, Golders Green Road, both in London. Nov. 24, 1932, No. 33275. [Class 68 (i).] An excavating machine, such as a bucket chain machine, for use in the installation of piling to support the excavated trench, has side shields 13, 14 supporting the trench walls and spaced guide means 15 for the entering pile or section thereof which leave part of the pile &c. exposed for cross strutting, the shields forming at the rear of the machine a clearance within which one or more men may be supported to travel with the machine and fix the struts. The inclined forward edge of the shield is placed about in the axis of the bucket chain boom 6 and the shield pivots, or has a pivoted sector as in Specification 405,045 for adjustment of the rear edge to the vertical. Platforms 16, 17, are provided for the workmen and materials. The shields, or separate shields 19, may enclose the idle run of the bucket chain which is then preferably as described in Specification 405,088 to cut wider than its width. An inclined wall 22 may isolate the clearance from the bucket chain and a guard 23 may be provided for protection against falling material. The guides 15 may be within the shielded clearance so that piles on insertion are shielded from the trench wall. The piles may have attached members 25, Fig. 7, with slots receiving hooked ends 27 of the struts, and bars may project from the shields, or a trailing frame be provided, to hold the pile structure against swaying. The boom 6 may support two or more bucket chains adjustable to vary the width of the trench and the idle run or runs of a bucket chain may pass within external recesses in the shields.
Patent GB-755318-A (GB)
Title: Improvements in or relating to tongs for use with metal seals
Inventor: MOOLENAARS JAN
IPC: G09F3/03
Filed: 1954-11-18
Abstract: 755,318. Tongs. SEALSFAST, Ltd. Nov. 18, 1954, No. 33447/54. Class 61 [Also in Group XV] In tongs for rolling up the tongue of a metal tag around tying means, the cooperating parts which are to receive the tongue are provided, the one with a projection and the other with a corresponding recess to bend the rolled up seal as shown at 15. The head 7 of the member 6 which supports the tongue 1 of the tag, has semicylindrical surfaces 8, 9 the central face 8 projecting beyond the faces 9. The spring loaded head 5 of the tongs has a central recess 14 corresponding to the projection 8. The tongs are operated by a toggle joint lever 10 pivoted at 12 to the supporting member 6.
Patent GB-642968-A (GB)
Title: Windows with mountings for curtains
IPC: E06B9/24
Filed: 1947-12-18
Abstract: 642,968. Suspending curtains. PERSSON, E. S. Dec. 18, 1947, Nos. 33461 and 33462. Convention dates, Dec. 13, 1943. [Class 52 (v)] [Also in Group X] In movable window sashes, particularly those comprising a pair of sashes 1, 2 integrally joined and swingable about a median horizontal axis, there are provided curtains 6 stretched between upper and lower hooks or other holders 5 connected to rollers and movable along channels 3 in the upper and lower members of one of the sashes. The curtains are operated by a drawstring.
Patent GB-1241660-A (GB)
Title: Improvements relating to cigarette lighters
Inventor: RETZLER WILLIAM
IPC: F23Q2/46
Filed: 1967-11-10
Abstract: 1,241,660. Friction lighters. TETRA MOLECTRIC Ltd. 14 Oct., 1968 [10 Nov., 1967], No. 33472/69. Divided out of 1,241,659. Heading F4F. The whole of the subject matter of this Specification is included in the Specification 1,241,659, but the claims relate to the fact that some parts of the lighter action are of plastics material.
Patent GB-783232-A (GB)
Title: Improvements in or relating to the separation of water from mud
IPC: C02F11/126
Filed: 1955-11-23
Abstract: 783,232. Straining mud. STENGEL, E. Nov. 23, 1955, No. 33610/55. Class 46. Apparatus for removing water from mud comprises an inclined screening cylinder 4 secured concentrically in an outer covering cylinder 1 mounted in roller bearings on tiltable supports 11 which permit the cylinders to be oscillated about an axis parallel to and below the longitudinal axis of the cylinder, preferably by crank discs 18 and connecting rods 19, whilst they are rotated by a motor 12 and belt drive 13. A coarse mesh screen 3 supports the screening cylinder 4 and is itself supported by apertured webs 5 in the covering cylinder 1. The connecting rods 19 engage the uppermost parts of supporting rings 8 in which the cylinder 1 is mounted. Mud entering by a pipe at the higher end of the cylinder is shaken down the inside of the screen 4, water escaping through the screen to an outlet at the lower end.
Patent GB-1120245-A (GB)
Title: Ventilating fan
IPC: F04D25/16
Filed: 1965-08-06
Abstract: 1,120,245. Ventilators. LUDWIG BAUMANN K.G. 6 Aug., 1965 [15 Feb., 1965], No. 33702/65. Heading F4V. [Also in Division F1] A ventilating fan for mounting in a wall or window comprises an inner set of impeller blades 14 the tips of which are connected to a cylinder 15 having a further set of blades 16 mounted on its outer surface, the arrangement being such that the sets of blades drive the air in opposite directions. Blades 16 rotate in an annular chamber 25 having inlet and outlet openings 19, 20 and a radially inwardly projecting baffle 24 which causes air to flow in a U-shaped path through the chamber. The casing 26 defining chamber 25 is provided with flared portions 10 which, together with cylinder 15, define a duct for the passage of the inner air flow. A pivoted hood 28 incorporating a filter 29 is provided on the outer side of the fan so that with the hood in its open position air is extracted from the room by the inner blades and fresh air supplied to the room by blades 16, while when the hood is closed, as shown, air from the room is passed through the filter by blades 14 and returned to the room by blades 16. Adjustable slides 32 are provided for openings 19, 20. In a modification (Fig. 3, not shown), the fan has an iris diaphragm which in its retracted position is accommodated within baffle 24 and is movable into a slot extending through blades 16, cylinder 15 and blades 14 to out off both air flows. Chamber 25 may be provided with heating elements and replaceable de-odourizing and disinfecting means.
Patent GB-1218520-A (GB)
Title: Spindle for a record changer
IPC: G11B17/16
Filed: 1969-07-04
Abstract: 1,218,520. Turntable spindle. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 4 July, 1969 [8 July, 1968], No. 33769/69. Heading G5R. A non-stepped centre post 1 for a gramophone record changer comprises primary support elements 2, secondary support elements 4 for supporting and lifting during the change process the record stack above the lowermost record 3 and clamping elements 9 with tips 10 for holding the lowermost record in situ during at least the period the secondary support elements are probing for the gap between the lowermost 3 and next lowermost 3<SP>1</SP> records. Upward movement of the rod 12 and control bush 13 mounted thereon by the record change mechanism moves cam faces 17 into engagement with the bent-in parts 11 of three leaf springs 9 to move the tips 10 of these springs into clamping engagement with the lowermost record 3. Thereafter a second set of cam faces 16 engages bent-in parts 8 of three leaf springs 4 to move the secondary support tips 7 of these springs outwardly whilst at the same time the springs are moved axially of the spindle by spring 18 which engages the control bush and also the bush 5 supporting the secondary support springs 4. The tips 7 of the springs thus probe for and enter the gap between the lowermost and the next lowermost record and when the control bush 13 reaches bush 5, the bush and the records other than the lowermost are lifted to allow a record size measuring arrangement to engage the lowermost record. In this position the cam 17 has passed over the bent-in part 11 in the clamping springs 9 and the primary support members are then withdrawn to allow the lowermost record to drop on to the turntable.
Patent GB-1392515-A (GB)
Title: Filaricidal and trypanocidal phenylarsenodithio compound
IPC: C07F9/74
Filed: 1972-07-19
Abstract: 1392515 Phenylarsenodithio compound E A H FRIEDHEIM 19 July 1972 [20 July 1971] 33817/72 Heading C2J The compound of formula (and salts and acid addition products thereof) is prepared by reacting about 1 mole of p-melaminyl-phenylarsenoxide with about 2 moles of (CH 3 ) 2 CSH.CHNH 2 -CO 2 H (D - penicillamine), usually in water and/or a C 1-6  alcohol at 20-100‹ C. The acid addition products can be obtained directly by effecting the reaction at a pH of 1 to 4 by addition of HCI, H 2 SO 4 , H 3 PO 4  CH 3 SO 3 H, citric acid or tartaric acid, and the salts are obtained by dissolving the reaction product in water or an alcohol at a pH of 9-10- provided by NaOH, KOH, (C 2 H 5 ) 2 NH, or 1,6 diaminohexane. The compound has filaricidal and trypanocidal properties and may be incorporated into pharmaceutical compositions together with carriers or diluents.
Patent GB-983418-A (GB)
Title: Improvements in electrical model roadways
IPC: A63H18/12
Filed: 1963-08-27
Abstract: 983,418. Toy vehicle roadways. GEBR FALLER G.m.b.H. Aug. 27, 1963 [May 24, 1963], No. 33849/63. Heading A6S. An electric model roadway having two independently electrically controlled lanes for two-way traffic has overtaking sections with switchpoints for transferring a vehicle from its own lane into the opposite lane and back again, in which, when the switch points are set for overtaking, switching means break the normal electrical connections to said opposite lane between the said switchpoints and connect thereto the electric circuit of the overtaking vehicle's own lane. Fig. 1 shows a two-way traffic plan in which each lane is provided with a pair of conductors, the adjacent one of each lane being from a common point 9, and the outer conductors taking a supply from rectified halves 10, 11 of an A.C. source. The traffic plan comprises sections connected together by known means, and at intermediate points are inserted sections with cross-over points whereby a vehicle may be moved over to the other track and back again when overtaking another vehicle travelling in the same direction. Figs. 2 and 3 show enlarged views of such sections, Fig. 2, in the non-operating condition and Fig. 3 showing the points switched for overtaking. It will be seen in Fig. 2 that breaks 27, 28 in the conductors 3, 4 of the opposite lane are short-circuited by connections 36, 37 during normal operation, but when the overtaking points are switched as in Fig. 3, the intermediate sections of the opposite lane conductors are switched to connect with the appropriate conductors of the other lane. In addition the switching may include a series resistor 41, which may also be variable, to reduce the current to a vehicle being overtaken so that it is slowed to allow the other vehicle more certainly to overtake.
Patent GB-1195895-A (GB)
Title: Tertiary Ether Glycol Derivatives
IPC: C07C271/06
Filed: 1967-07-24
Abstract: 1,195,895. Carbamates derived from tertiary ether glycols. ORTHO PHARMACEUTICAL CORP. 24 July, 1967 [25 July, 1966], No. 33924/67. Heading C2C. Novel carbamates of the formula wherein R, R<SP>1</SP> and R<SP>11</SP> are alkyl, alkaryl, aralkyl, or carbocyclic, or R and R<SP>1</SP> taken together with the carbon atom to which they are attached are carbocyclic, and Y is alkylene of up to eight carbon atoms, having a chain of at least 2 and not more than 5 carbon atoms separating the two oxygen atoms, are prepared by reacting the corresponding tertiary ether glycol with an alkali metal cyanate in the presence of trifluoroacetic acid and an inert solvent.
Patent GB-870120-A (GB)
Title: Improvements in or relating to circuit arrangements for indicating voltages
IPC: H03J3/14
Filed: 1957-11-04
Abstract: 870,120. Radio receiving circuits. TELEFUNKEN G.m.b.H. Nov. 4, 1957 [Nov. 3, 1956], No. 34279/57. Class 40(5) [Also in Group XXXVI] A voltage indicating circuit, e.g. a tuning indicator, comprises a tube having two indicating systems, one for low and one for higher voltages, each having an individual luminous indicating' electrode and the control electrode of the latter being biased by a voltage of opposite polarity to the voltage to be measured which is stated to prevent appreciable overlap between the two indicating systems. In the embodiment shown, the alternating voltage to be measured is applied at 13, 14 and rectified by rectifier 15 to set up a negative potential at point 17 which is connected to the low voltage system control electrode 7 of indicator tube 1 through resistor 19 and to high voltage system control electrode 8 through resistor 20, electrode 8 being also connected through resistor 21, 20 to the positive operating potential so that electrode 8 is biased positively. The circuit is so adjusted that the positive bias of electrode 8 is just overcome and the high voltage system begins to indicate when the low voltage system indication is at its maximum value.
Patent GB-1487159-A (GB)
Title: Combing and cleaning device for a carding machine
IPC: D01G15/18
Filed: 1975-08-18
Abstract: 1487159 Sub units for carding engines J B ESTEBANELL 18 Aug 1975 [26 March 1975] 34312/75 Heading DIN  A device for use in a carding engine comprises a framework which adjustably mounts a first cylinder 6 and a smaller cylinder 7, there being plates 8 and 9 cylindrically curved about an axis parallel to the cylinders, at either side of the cylinders and positioned to lie over the main drum of a carding engine when the device is installed. An angle blade 13 lies between the cylinders and a further blade 16 extends toward the larger cylinder 6 through a casing 10 to separate dirt particles which may be removed by suction. The interior surface of the casing 10 is provided with card clothing.