baber/WOPTO huggingface dataset:
Patent GB-144143-A (GB)
Title: Improvements relating to rotary fluid compressors, exhausters, movers or engines
IPC: F01C1/352
Filed: 1919-08-18
Abstract: 144,143. Hay, W. G. Aug. 18, 1919. Fixed-abutment type; balancing moving parts. -In a rotary pump or engine of the outwardly. sliding vane type, Figs. 1 and 2, or of the hinged. vane type, Fig. 3, the rotor a carries vanes c, Figs. 1 and 2, or c<1>, Fig. 3, which are pivoted tc arms d or d' rotating round spindles f or w at the centre of the casing g. The vanes, which are hollow and open at their inner ends, are arranged so as to give a small constant clearance between their tips and the casing. If of the hinged type, the vanes may be balanced by counterweights 18, Fig. 3, connected to the vanes by link mechanism 6, 7 pivoted to the spindle 8. The bearings of the inner ends of the' connecting-rods d, Fig. 2, are lubricated through a passage k in the spindle f. The vanes c are lubricated through passages m, l and grooves o leading to the inner ends of the recesses b containing the vanes. The outer ends of the connecting-rods d are lubricated through passages p which conduct lubricant from the spindle f. Similar arrangements suitably modified are employed in the form shown in Fig. 3.
Patent GB-529633-A (GB)
Title: Improvements in photographic enlarging and other optical projection apparatus
IPC: G03B27/36
Filed: 1939-07-12
Abstract: 529,633. Photographic enlargers; optical projectors. McKERROW, C. N. July 12, 1939, Nos. 20338/39 and 4475/40 [Classes 97(i) and 98 (i)] In optical projection or photographic enlarging apparatus focusing is effected by adjusting the position of a carrier stage for the condenser and negative, the separation of the light source and projection lens being constant ; adjustment may be effected by a spiral cam, and automatic focusing means as described in Specifications 461,574 or 516,748 may be provided. As shown, a lamp house a is secured to an arm c slidable on a pillar, and a lens panel f is secured by tubes e to the arm c. A stage g<SP>1</SP>, carrying a condenser g within a sleeve g<SP>2</SP> telescoping over the lamp house, and provided with gaps g<SP>3</SP> alternatively carrying a negative, is slidable on the tubes e, and is provided with a bracket j bearing a roller j<SP>2</SP> engaging a spiral cam strip h on a disc h<SP>1</SP> rotatably carried by a pin h<SP>2</SP> on the panel f. The bracket may comprise an extensible portion j<SP>1</SP> having holes alternatively engaged by a pin j<SP>3</SP> on a spring j<SP>4</SP>, the extension being varied with the focal length of the lens in use. The disc h<SP>1</SP> may have scales visible through windows k<SP>1</SP> in a fixed disc k; the scale graduations vary with the lens and the magnification. The strip h may be replaced by a slot, and scales on the bracket j may replace those on the disc h<SP>1</SP>, or scales may be dispensed with. Springs l or weights on cords passing over pulleys m partially support the stage g<SP>1</SP> &c. A modification is described in which the spiral cam is replaced by a stationary cam on the pillar engaged by a cranked lever pivoted on the arm c and supporting the stage g<SP>1</SP> &c.
Patent GB-532123-A (GB)
Title: Improvements relating to retractable aircraft landing gear
IPC: B64C25/16
Filed: 1939-07-12
Abstract: 532,123. Aircraft landing gear. GENERAL AIRCRAFT, Ltd., and LEATHER, G. B. July 12, 1939, No. 20356. [Class 4] A portion of an aircraft skin is bodily displaceable to accommodate retraction and extension movements of the landing gear and forms a fairing for the stowage space of the gear or a part of it when retracted. A forward wheel of a tricycle undercarriage is described which is movable in a substantially vertical direction into the fuselage after axial displacement of a streamlined nose cap 4. The cap 4 is moved by a jack 5. The undercarriage is retracted by a jack 12 acting on a lever 10 connected to the upper end of the leg 8 which is slidable in a pivoted bracket 7. Locking means are provided for securing the leg in the bracket and for holding the bracket in order to take landing shocks. The tail portion of the fuselage or the leading edge of a wing or engine nacelle may be similarly mounted to give access to the stowage space of landing gear disposed in other positions.
Patent GB-985580-A (GB)
Title: Self-sustaining switch-circuit
IPC: H02M3/135
Filed: 1962-05-28
Abstract: 985,580. Semi-conductor switching circuits. SPERRY RAND CORPORATION. May 28, 1962 [June 8, 1961], No. 20440/62. Heading H3T. In a pulse generating circuit which may be used for controlling the firing of a print hammer in a high speed printer, a capacitor 20 which is charged from source 13 through currentlimiting components 16, 17 is discharged through the load coil 15 upon the application of a suitable positive pulse to the gate electrode of SCR10. Conduction in the SCR being terminated when the current in the coil 15 attempts to reverse at the end of one half period of the oscillatory circuit constituted by coil 15 and capacitor 20 then re-charging to the potential of source 13 through resistor 16 and inductor 17. A diode 19 may be connected as shown to prevent oscillatory overshoot during the re-charging of capacitor 20. Capacitor 24 and resistors 25, 27 may be provided to give an indication when SCR10 conducts and also to assist in the provision of the initial current through the SCR to maintain it conductive when the triggering pulse is first applied.
Patent GB-1465950-A (GB)
Title: Quick-assembly formwork
IPC: E04G11/02
Filed: 1974-05-09
Abstract: 1465950 Formwork for walls and ceilings DREISKAMPER GmbH 9 May 1974 [10 May 1973] 20546/74 Heading E1S Formwork for a storey of a building comprises ceiling formwork 1 supported on inner wall formwork 2, and outer wall formwork 3, each made up from framed panel elements, the ceiling formwork 1 being carried by support members 6 bearing on the inner wall formwork 2 and secured to the ceiling formwork 1 by releasable clamps 7. The gap between the wall and ceiling formwork is covered by an angle-section corner formwork element 9, which is hooked into the support member 6. Each clamp 7 has a tapered edge for engaging in a groove 13 of the support member 6, and an opposed tapered edge provided on an eccentric operable by a lever, for engaging in a groove of the ceiling formwork 1. The support member 6 engages in a groove 8 of the wall formwork 2. The formwork elements comprise plastics-coated aluminium alloy panels with aluminium alloy frames.
Patent GB-1531824-A (GB)
Title: Semi-conductor memory device
IPC: H01L27/108
Filed: 1976-05-19
Abstract: 1531824 Semi-conductor devices AMERICAN MICROSYSTEMS Inc 19 May 1976 [23 Oct 1975] 20567/76 Heading H1K A semi-conductor memory cell comprises an IGFET having a buried source region 34 in a substrate 36, which region also constitutes a storage capacitor, an overlying drain region 40 in the surface of an epitaxial layer 50, and a gate oxide 58 and conductor 60 located between the regions 34, 40 on a wall of a recess 56 extending through the region 40 and reaching the region 34. The recess 56 is preferably of V-shaped cross-section, being formed by anisotropic etching. The gate conductor 60, which may be of metal or polysilicon, preferably extends as a memory address line 44 for an array of such cells, and similarly an extension 42 of the region 40 constitutes a bit line. Alternatively the bit line may comprise an extension of the buried source/capacitor region 34. The semi-conductor body may also contain planar surface IGFETs and implanted resistors. An outdiffused layer 52 of resistivity intermediate between that of the heavily doped substrate 36 and lightly doped epitaxial layer 50 preferably lies between the two.
Patent GB-625825-A (GB)
Title: Improvements in electrical regulators of the variable compression type, such as carbon pile regulators
IPC: H02P9/22
Filed: 1946-07-10
Abstract: 625,825. Automatic regulators. BENDIX AVIATION CORPORATION. July 10, 1946, No. 20654. Convention date, Aug. 25, 1945. [Class 38 (iv)] In a regulator of the carbon pile type a rectangular leaf-spring 45 secured to the armature 48 and controlling its movement relative to the core 5 of the electromagnet 7 is provided with corrugations 53, 54 respectively adjacent to two opposite ends which are clamped upon an annular support 10 by bars 49, 51. Alternatively, one end portion only may be corrugated. In a modification, the spring is formed as a circular diaphragm with a series of corresponding corrugations adjacent to the clamped circumference. Specification 608,508 is referred to.
Patent GB-1035755-A (GB)
Title: Improvements in push-pull transistor amplifier arrangements without transformers
IPC: H03F3/30
Filed: 1965-05-17
Abstract: 1,035,755. Transistor amplifying circuits. LOEWE OPTA A.G. May 17, 1965 [July 11, 1964], No. 20664/65. Heading H3T. In a transformerless Class B push-pull amplifier in which a phase splitter using a complementary pair of transistors 2, 3, feeds output transistors 4, 5, cross-over distortion is minimized by feedback to a tapping in the collector load of the driver transistor 1 which increases the effective output impedances of the driver stage 1. The feedback may be derived from the emitter of transistor 2 or, as in Fig. 1 (not shown) from an emitter follower interposed between transistors 1 and 2. In Fig. 2 (not shown), complementary output transistors 4, 5 are used, the transistor 5 being fed from the emitter of transistor 3.
Patent GB-1189453-A (GB)
Title: Improvements in or relating to Circuit Arrangements of the kind Employing a Field Effect Transistor and n Junction Transistors
IPC: H03F3/345
Filed: 1967-05-04
Abstract: 1,189,453. Transistor amplifying circuits. PHILIPS ELECTRONIC & ASSOCIATED INDLSTRIES Ltd. 4 May, 1967 [6 May, 1966], No. 20714/67. Heading H3T. [Also in Division H1] An amplifier comprises in cascade a field effect transistor T 1  and at least one junction transistor T 2 , T 3 , the drain of the field effect transistor being connected to the base of the first junction transistor, and a resistor R being connected between the base and emitter of the final junction transistor, the resistor having a value 5#n times the internal base-emitter resistance of the final transistor, where n is the number of junction transistors. Such value for resistor R is said to be an optimum for high transconductance and low distortion of the amplifier. A diode D 1  may be included to protect the insulation layer of the field effect transistor (e.g. a MOST or MNST) from breakdown. The transistors, diode and resistor R may be integrated (Fig. 5, not shown, see Division H1).
Patent GB-315572-A (GB)
Title: Improvements in or relating to the lining of pipes
IPC: B28B19/00
Filed: 1928-07-17
Abstract: 315,572. Cornelius, F. B., and Stanton Ironworks Co., Ltd. July 17, 1928. Centrifugal machines; moulding pipes and tubes. - A device for partial blanking of pipe ends during lining with cementitious material, particularly centrifugally, comprises two relatively displaceable members applicable together to the pipe and a resilient, deformable member adapted to form a seal. As shown, the device comprises a hollow cylindrical member a over which slides a ring c and a resilient sealing- ring b situated between opposed, bevelled faces a<1>, c<1> on the members a, c. The ring c is moved axially by a ring d screwing on to the member a and operable by handle extension d<1>; or by bolts and nuts. A reduced bore a<3> determines the bore of the lining; one or more removable rings may also be used.
Patent GB-377422-A (GB)
Title: Improvements in or relating to connecting devices for pipes and the like
IPC: F16L21/00
Filed: 1931-07-21
Abstract: 377,422. Pipe couplings. LEYLAND & BIRMINGHAM RUBBER CO., Ltd., Golden Hill Works, Leyland, near Preston, Lancashire, and BEACH, A. E., Buckley & Beach Metal Works, Shawfield Street, Chelsea, London. July 21, 1931, No. 20800. [Class 99 (i).] A rubber tubular connector has a cover of canvas or other fabric which is secured by adhesive to the whole of its outer surface. The cover may extend as at B<1> over the ends of the tube. Grooves D<2> are provided for the pipeend flanges C.
Patent GB-1341284-A (GB)
Title: Reversal developing method for electrostatic latent images
IPC: G03G9/12
Filed: 1971-04-19
Abstract: 1341284 Reversal developing process RANK XEROX Ltd 19 April 1971 [3 Feb 1970] 20808/71 Heading G2H Reversal development of an electrostatic latent image on the lower surface of a photo-conductive layer 10 is effected by means of a suspension in insulating liquid of toner particles of the same polarity as that of the image charges; the image bearing member being faced by an electrode 14 and backed by a corona discharge device 20 which sprays the back of the member with ions of the opposite polarity to that of the image charges. Insulating spacers 15 support the image bearing member. Various image bearing members incorporating insulating and metal layers are described with respect to Fig.3 (not shown).
Patent GB-692181-A (GB)
Title: Manufacture of ceramic articles
Inventor: PIRANI MARCELLO
IPC: C04B28/24
Filed: 1947-07-31
Abstract: Ceramic articles are made by firing a moulded mass formed from a mixture of pulverulent ash, free from carbon, obtained from a furnace burning powdered fuel, and an aqueous dispersion of a colloidal silicate or colloidal silica serving as a binding-agent. The binding-agent may be sodium, potassium, or ethyl silicate and does not exceed in amount 5 per cent. of the ash calculated on a dry basis.  The article can be glazed either during or after firing, a glaze of relatively high melting-point being produced by adding to the normal glaze titanium dioxide and/or an alumina borosilicate glass.  If sodium silicate is used as the binding-agent, the glazing-composition is suspended in ethyl carbonate instead of water. The ash is freed from carbon before mixing by burning in an atmosphere containing oxygen.
Patent GB-659022-A (GB)
Title: Production of organosiloxanes
IPC: C08G77/00
Filed: 1949-08-11
Abstract: Organosiloxanes are made from organochlorosilanes of the formula RnSiCl4-n, where R is an alkyl or monocyclic aryl radical and n has an average value of at least 1.7, by introducing the silane or silanes in liquid phase at the upper end of a gas and liquid contact zone, and introducing water vapour at the lower end of the zone, the silane being introduced in sufficiently large proportion relative to the water vapour for the hydrogen chloride which issues from the upper end of the zone to be anhydrous, and the water vapour being introduced in sufficiently large proportion relative to the silane for the water vapour to effect hydrolysis of the silane with condensation of the hydrolysis product thereof to siloxane.  Silanes of the type R2SiCl2 or R3SiCl or mixtures thereof may be used, or the silane(s) may contain SiCl4 and/or RSiCl3.  The reaction may be effected in one or more contact zones, such as a bubble cap column, a packed column or combinations thereof, in which the silane is introduced at the top and the watervapour or a mixture of steam and hydrogen chloride is introduced at the bottom.  Anhydrous hydrogen chloride is withdrawn from the top of the column(s), and where necessary is separated from volatile silanes by refrigeration, the condensed silanes being returned to the contact zone.  The liquid siloxane withdrawn from the bottom of the zone may contain water or be free therefrom if the lower part of the zone be supplied with indirect heat exchange.  In examples the silanes used are: (1) (CH3)2SiCl2; (2) C6H5.CH3SiCl2; (3) C6H4 (CH3)2SiCl; (4) (CH3)3SiCl; (5) C2H5.CH3 SiCl2; (6) a mixture of (CH3)2SiCl2 and (CH3)2SiCl; (7) a mixture (C6H5)2SiCl2 and (CH3)3SiCl; (8) (C6H5)2SiCl2 dissolved in benzene; (9) (CH3)2SiCl2 dissolved in toluene; and (10) a mixture of (CH3)2SiCl2, (CH3)3SiCl, CH3SiCl3 and SiCl4.ALSO:In making organosiloxanes from organochlorosilanes of the formula RnSiCl4-n, where R is an alkyl or monocyclic aryl radical and n has an average value of at least 1.7 (see Group IV (a)), the silane(s) in liquid form is introduced at the upper end of a gas and liquid contact zone and water vapour at the lower end, the silane(s) being introduced in sufficiently large proportion relative to the water vapour for the hydrogen chloride which issues from the upper end of the zone to be anhydrous. Silanes of the type R2SiCl2 and/or R3SiCl may be used or they may contain SiCl4 and/or RSiCl3.  The reaction may be effected in one or more contact zones, such as a bubble cap column, a packed column or combinations thereof, in which the silane(s) is introduced at the top and steam at the bottom.  Anhydrous hydrogen chloride is withdrawn from the top of the column(s), and where necessary is separated from volatile silanes by refrigeration, the condensed silanes being returned to the contact zone.  A mixture of water vapour and hydrogen chloride may be used instead of steam, whereby anhydrous hydrogen chloride is obtained from the moist hydrogen chloride together with process hydrogen chloride.
Patent GB-1399088-A (GB)
Title: Cephalosporin compounds
IPC: C07D307/54
Filed: 1971-05-14
Abstract: 1399088 Cephalosporin compounds GLAXO LABORATORIES Ltd 12 May 1972 [14 May 1971 1 Oct 1971] 20952/72 and 20953/72 Divided out of 1399086 Heading C2C Novel 7 - acylamido - ceph - 3 - em - 4 - carboxylic acids and salts and esters thereof and the corresponding 1-sulphoxides, wherein the 7-acylamido group has the structure in which R is hydrogen or an organic group and R<SP>a</SP> is an etherifying monovalent organic group linked to the oxygen atom through a carbon atom, said compounds being in the anti isomeric form as regards the configuration of the group OR<SP>a</SP> with respect to the carboxamido group, or being a mixture of syn and anti isomers containing at least 75% of the anti isomer, are prepared by acylating a 7-amino or 7-isocyanato ceph-3-em carboxylic acid or its salt or ester, with an acylating agent corresponding to the acid of formula and then recovering the desired 7-acylamido ceph-3-em compound, if necessary after separation of the syn and anti isomers.
Patent GB-318235-A (GB)
Title: Thermionic valve systems
IPC: H04B1/16
Filed: 1929-07-08
Abstract: 318,235. Victor Talking Machine Co., (Assignees of Lafferty, C. L.). Sept. 1, 1928, [Convention date]. Thermionic amplifiers. - The filament or cathode of one of the valves of a thermionic amplifier is heated from a circuit associated with the anode of a second valve, in such a way that the voltage across it does not increase with a rise in current in the said anode circuit. The output of a full-wave thermionic rectifier is fed to a potentiometer R, and the filament f<1> of valve 12 is heated from tappings 14, 15 on R intermediate of the tappings supplying the anode p<2> of valve 17, through leads 21, 22. The anode p<1> of valve 12 is supplied from a tapping 16, while grid-bias potentials for valves 12, 17 are supplied from tappings 13, 18 'respectively. The filament f<2> or cathode of valve 17 is heated from a secondary winding s<3> of the transformer T feeding the rectifier. In the arrangement shown, a gramophone pick-up P feeds the valve 12 with speech-potentials through a volume-control potentiometer 10 and transformer T<1> while the two valves are coupled by a transformer T<2>, and a loudspeaker E is fed from an output transformer T<3>.
Patent GB-640380-A (GB)
Title: Improvements in metal plate rectifier units
Filed: 1947-08-01
Abstract: 640,380. Dry-contact rectifiers. KOTRON RECTIFIER CORPORATION. Aug. 1, 1947, No. 21037. [A Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 1, 1947.] [Class 37] A thin flat sheet 11 at least' in part of insulating material is deformed and holds in the same plane several metal rectifiers 10 having their opposite faces connected by spring strips 12 to form a flat assembly with the rectifiers connected in series. The sheet 11 is of vulcanized resin-impregnated fibre of channel form with apertures 32 beneath the rectifiers for cooling and bosses 33 stamped up to support the rectifiers slightly above the sheet. The metal spring connecting strips 12 are riveted to bosses 28 on the sheet 11 and have tongues 26, 41 disposed over one rectifier and under the next. The rectifiers comprise selenium, copper oxide or copper sulphide, the last-named in contact with magnesium. The sheet 11 has end tabs 20 with holes 22 with annular bosses 24 and has further apertured boss 24 to space the sheet from a surface on which it is mounted. Bosses 27-29 are stamped up on the sheet 11 to space the reactangular rectifiers placed thereon, the rectifiers being individually removable. The tongue 41 has a raised part 40 preventing the tongue from contacting the edge of a rectifier. Terminal strips 13 contact one face of the end rectifier, are riveted to a boss on the sheet 11 and may be apertured at 44 and grounded if desired by riveting through the aperture 22. The assembly may be mounted on a chassis of a radio set or the like and may serve as rectifier in place of the usual rectifier tube. In a modification, the rectifiers are placed on the sheet 11 with adjacent rectifiers having their positive sides facing in opposite directions and are connected in series by metal strips arranged over and under two adjacent rectifiers.
Patent GB-861734-A (GB)
Title: Improvements in or relating to control systems for turbine-driven positive-displacement pumps
Inventor: TROWBRIDGE DAVID ROY
IPC: F04D15/00
Filed: 1956-07-06
Abstract: 861,734. Fluid-pressure servomotor-control systems. PLESSEY CO. Ltd. July 5, 1957 [July 6, 1956], No. 21076/56. Addition to 847,372. Class 135. [Also in Group XXVI] In a turbine-driven positive-displacement pump unit 1, 4 with means for automatically controlling the speed of the turbine under varying load conditions as claimed in Claim 1 of the parent Specification and wherein the turbine constitutes an internal-combustion turbine and the auxiliary pump 30 constitutes the fuel pump thereof the pressure-responsive device 9, 18a controls a spill valve 18 for the fuel and a metering orifice 31 is disposed between the fuel pump and the valve so as to produce a flow-responsive pressure drop between the fuel pump and the control means. In a modification, the fuel is supplied by the pump 30 to the combustion chamber of the turbine through restricted passages 12a, 22, 13 in a valve assembly, see Fig. 1 of Provisional Specification, having a spill passage 17 controlled by a spring- loaded differential piston 19, 20 subjected to the delivery pressure of the fuel pump and the positive displacement pump through passages 12b and 7 respectively. The differential piston may incorporate a thrust collar for its associated spring, see Fig. 2, of Provisional Specification (not shown), and may be limited by stops in one or both directions.
Patent GB-352738-A (GB)
Title: Improvements in dress shields
IPC: A41D27/13
Filed: 1930-07-12
Abstract: 352,738. Dress shields. FRIEDLANDER, A. S., 2040, Gough Street, San Francisco, U.S.A. July 12, 1930, No. 21188. Convention date, July 17, 1929. [Class 141.] A dress-shield comprises a piece of soft fabric 4 for attachment to the garment and the usual pair of waterproof flaps 13. 14, the piece 4 and the flaps having interconnecting fastenings One of the flaps has press-fastening elements 10a or the like mounted on the inside and capable of co-operating with complementary fastening elements 10 on the piece 4, which can be stitched or otherwise fastened to the garment in the usual position adjacent the arm hole.