baber/WOPTO huggingface dataset:
Patent GB-1402978-A (GB)
Title: Method and circuit for combining digital and analogue signals
IPC: H03M1/00
Filed: 1973-07-11
Abstract: 1402978 Digital to analogue converter WESTINGHOUSE ELECTRIC CORP 11 July 1973 [31 July 1972] 33023/73 Heading H3H A circuit for subtracting the analogue equivalent of a digital signal SD1 from another analogue signal SAID comprises a plurality of digitally weighted current sources 32, 34, 36, two summing junctions 26, 28 separated by at least one impedance element 30, means for applying the analogue voltage to one (26) of the junctions and for deriving an output voltage SA3 from the other junctions (28) and switches SW1-SW3 for selectively switching the currents from the current sources from one junction to the other in response to the digital signal. The digital signal and the complement of each value are fed to opposite sides of the respective switch SW so that one of the transistors conducts. "One" values of signal B pass current from the sources to junction 28 and through resistor 30 to junction 26 setting up a potential difference which opposes the analogue input which is supplied via isolation amplifier 24 to junction 26. The opposing voltage is proportional to the digital signal. As the current through junction 26 remains constant transients are minimized or prevented. In alternative embodiments, impedance, e.g. resistance networks may be used to generate the digitally weighted currents or a combination of both methods may be used. The circuit may be used to generate the difference analogue voltage in coarse and fine (subranging) analogue to digital converters.
Patent GB-666389-A (GB)
Title: Recording device
IPC: G01D15/16
Filed: 1949-12-28
Abstract: 666,389. Recording apparatus. SANDVIKENS JERNVERKS AKTIEBOLAG. Dec. 28, 1949 [Dec. 30, 1948], No. 33128/49. Class 106 (iv). Apparatus for recording values of the variable quantity measured by a measuring instrument comprises a recording element 6 adapted intermittently to make records on a movable recording strip 1, a rotatable roller 4 having a sheet or endless band 5 applied thereto and held in contact with the recording strip 1 in order to receive and gather records applied thereto, the same part of the sheet 5 coming into contact several times with the recording strip 1. The sheet 5 may be of blotting paper and the roller 4 is preferably driven by the strip 1 which is driven over rollers 2, 3. A drop yoke or other device brings the element 6 into contact with the strip 1 at constant intervals and the element 6 is supplied through a channel 7 with an ink which does not dry before a record reaches the roller 4 which roller may be situated between rollers 2, 3 or opposite either of them. The element 6 moves transversely to the direction of movement of the strip 1 and the sheet 5 is ruled with lines indicating various values so that at the end of a statistical investigation the reading frequency in the various ranges thus defined may be counted.
Patent GB-761031-A (GB)
Title: Surgical catgut polishing apparatus
IPC: B24B5/50
Filed: 1954-11-16
Abstract: 761,031. Polishing surgical catgut. ETHICON, Inc. Nov. 16, 1954 [Nov. 16, 1953]. No. 33177/54. Class 60 Apparatus for polishing surgical catgut to uniform gauge and circular crosssection comprises a grinding wheel 12, a regulating wheel 14, and a work support 15; the catgut strand 26 is held firmly in contact with the support 15 as it passes through the grindirig throat by liquid delivered from an adjustable nozzle 24 positioned above the throat. The liquid may be water, lard oil or a kerosene fraction of hydrocarbon oil and serves also to cool the catgut and wash away debris. The regulating wheel 14 is set at an angle with respect to the grinding wheel 12 so as to feed the strand through the grinding throat; the strand may be propelled through the throat by means of an additional push and pull operation, e.g. a hydraulic injector and pneumatic ejector. Specifications 550,850 and 550,859 are referred to.
Patent GB-1444643-A (GB)
Title: Warning device for photographic cameras
IPC: G03B17/20
Filed: 1974-07-26
Abstract: 1444643 Cameras FUJI PHOTO OPTICAL CO Ltd 26 July 1974 [28 July 1973] 33199/74 Heading G2A A camera has a light emitting indicator 43 e.g. for indicating shutter speed, which also serves as a warning device by flashing when, for instance, battery voltage is low. As shown, the indicator which is visible in the view-finder comprises light emitting diodes 43 connected via circuits 48, 47, 41b to a photo-detector 41a. A squarewave generator 46 and a warning signal generator 45 are connected to an AND gate 44, which transmits the squarewave to the diodes 43 when a warning signal is generated. This flashes the diodes. The indicator may alternatively indicate diaphragm aperture. The flashing may alternatively indicate probability of camera shake, over or under exposure, film shortage or the need for flash.
Patent GB-1523732-A (GB)
Title: Aersol valve and sprayhead
IPC: B65D83/14
Filed: 1975-08-08
Abstract: 1523732 Pressurized dispenser valves E H GREEN 8 Aug 1975 [20 Dec 1974] 33223/75 Heading F1R In a valve as described in Specification 1337816 the groove(s) in the wall of the socket is formed in two parts, an upper which communicates with the valve slot and merges with a lower portion which is restricted to provide metering means. The length/ cross-sectional ratio of the lower portion is such as to avoid capillary effect. The lower portion communicates with the stem through passage means formed at the floor of the socket. As shown in Fig. 3 the upper and lower portions 84, 85 communicate with a recess 88 in the floor 76. A gallery 78 may be formed at the valve seat end of the socket. The shoulders between the portions may slope inwardly Fig. 15 (not shown). The groove(s) may be of triangular cross-section Fig. 7 (not shown). The valve stem may be fixed in the socket. The floor passage may be formed by providing a stop for the end of the valve stem, Fig. 18 (not shown). The arrangement and dimensioning of the two portions of the groove(s) allows residual material in the grooves to flow into the floor well by gravity when the valve is closed.
Patent GB-1217069-A (GB)
Title: Hair drier attachments comprising brushes or combs
Inventor: FALANDRE PHILIPPE DE
IPC: A45D20/50
Filed: 1968-07-11
Abstract: 1,217,069. Hair driers. P. DE FALANDRE. 11 July, 1968 [12 July, 1967], No. 33238/68. Heading A5R. [Also in Division A4] A hair drying device, to be supplied with air from an air blower, comprises a brush or comb member 2 with one end of an openended tubular handle 1 secured co-axially to its body 3 by radial struts 4, the other end of the handle being connected when in usewith the air blower (not shown), the rear portion 5 of the body is aerodynamically shaped so that air discharged from the adjacent open end of the handle is directed parallel to and along the surface of the body. The struts my be integral with the handle or alternatively may be replaced by bars or ribs, parallel with the body, which are push-fitted into the open end of the handle.
Patent GB-917778-A (GB)
Title: Door control arm
IPC: E05F1/12
Filed: 1961-09-18
Abstract: 917,778. Hinges and pivots. REPUBLIC INDUSTRIES Inc. Sept. 18, 1961 [Sept. 19, 1960], No. 33337/61. Class 65 (2). A door 21 is mounted on a depending top pivot 24, which may be the spindle of a door closer and check 22 (not described), by means which permit its ready detachment or assembly and angular adjustment about the pivot axis. The means are located within the hollow top rail 20 of the door. The door leaves the factory complete with a plate 100 (Figs. 2, 3, 11), which is secured thereto by screws 27 and carries a leaf-spring 130, anchored by rivets 132, and a bolt 114 slidable in bosses 106, 108 and loaded by a spring 116. An arm 28 is clamped to the squared end of the pivot 24. The door is assembled on the pivot by turning the arm 28 to the door open position, guiding the door over the arm until the end 140 of the bolt 114 engages a socket 34 formed in the underside of the arm, and pushing the door towards the pivot to compress the spring 116 until the free end 134 of the leaf-spring 130, which is inclined upwardly, snaps into engagement with a depending shoulder 136 formed at the free end of the arm. The door can be detached by driving a screw, e.g. the screw 46 (see below) into a tapped hole 38 in the arm to push the end of the leaf-spring out of engagement with the shoulder, thereby enabling the top of the door to be pulled outwardly away from the arm. The angular adjustment of the door is effected by means of an eccentric bushing 42 (Figs. 2, 3, 4) freely rotatable in an aperture 44 at the free end of the arm and clamped in its adjusted position by a screw 46 engaging the lower plate 54 of an expander assembly 50, the upper plate 52 of which abuts the underside of the arm. The plates 52 (Fig. 9) and 54 are substantially rectangular and have tapered sides 74, 76 between which are trapped the tapered sides 70, 72 of a soft rubber expander 56 (Fig. 6). Tightening of the screw 46 compresses the expander 56 so that it is firmly engaged with the sides of the top rail 20 of the door. The end 134 of the leaf spring and the shoulder 136 are of arcuate shape (Fig. 3) to facilitate the angular adjustment.
Patent GB-676459-A (GB)
Title: Improvements in or relating to increasing the viscosity of gelatine solutions and photographic emulsions
Inventor: SCHOUTEDEN FERDINAND LEONARD
IPC: G03C1/053
Filed: 1949-12-31
Abstract: Copolymers of styrene and maleic anhydride and the ammonium salts thereof are made by dissolving a mixture of the monomers in toluene and polymerizing the mixture by heating at 80 DEG  C. in presence of benzoyl peroxide.  The ammonium salt is made by treating the copolymer with ammonia solution and the precipitated salt purified by repeated dissolution in water and precipitation in acetone.  An aqueous solution of the salt added to gelatine solutions increases their viscosity.  Specifications 630,016 and 632,174 are referred to.
Patent GB-1203081-A (GB)
Title: Improvements in bearings and method of construction thereof
IPC: B05D5/08
Filed: 1967-07-21
Abstract: 1,203,081. P.T.F.E. bearings. HEIM UNIVERSAL CORP. 21 July, 1967 [21 July, 1966; 23 Feb., 1967], No. 33567/67. Heading C3P. [Also in Division F2] A bearing liner for insertion in a bearing comprises a resin which is cured and forms part of a mixture including etched P.T.F.E. particles or threads. In an embodiment the liner has equal volumes of epoxy-base resin and P.T.F.E. powder or flock mixed together and deposited by painting or spraying, for example, on to a backing material such as a woven fabric having threads of fibreglass, for example. The bearing face of the liner may be provided with an additional layer of P.T.F.E. particles and may be dusted with molybdenum disulphide, for example. The resin composition is allowed to set and the liner is then placed between flat heated platens of a press and pressed for about half an hour. Thus the resin is cured and the P.T.F.E. particles are fixed to the backing material. Another layer of resin is applied to the liner and allowed to set. The liner 30, Fig. 5, with its uncured second coat of resin 40 and a backer 50 is formed into a tube and placed between an outer ductile metal member 10 and an inner member 20. The resin 40 is cured by heating and thus bonds the liner 30 to the outer member 10. The assembly is then contracted by pressure to form the bearing shown in Fig. 6. In a modification the liner is fabricated from cloth woven of P.T.F.E. threads or of P.T.F.E. threads interwoven with threads of cotton, for example. The compressed cloth with its second coat of uncured resin 3, Fig. 1, is then formed into a tube and placed between an outer ductile metal member 1 and an inner member 2. The resin 3 is cured by heating and the assembly is then contracted under pressure to form the bearing shown in Fig. 2.
Patent GB-1393685-A (GB)
Title: Extruding dies with means for continuous measurement of the temperature of metal flowing through them
IPC: B21C31/00
Filed: 1972-07-18
Abstract: 1393685 Extruding SWISS ALUMINIUM Ltd 18 July 1972 [20 July 1971] 33587/72 Heading B3P An extrusion die includes a thermoelectric element 5 to continuously measure the temperature of metal flowing through the die and the element is enclosed in a flexible shroud 17 so that its end can be positioned in the variously positioned bores 15 of different die bodies 1 using the same die holder 2. The end of the shroud is fixed to a tubular body 8 pivotally mounted on a ball 11 in the die holder. The ball has a slot and allows axial adjustment of the tubular body, the slot being closed to clamp the body by a clamping nut 9. The shroud is formed of three plaited wire hoses pushed over each other. A two-part connector 12 in the tubular body is axially adjustable by a fine screw thread in the body and has a lead 6 to a temperature indicator or automatic press speed regulator.
Patent GB-386096-A (GB)
Title: Improvements in stands or supports for wringing machines
IPC: D06F45/00
Filed: 1931-12-04
Abstract: 386,096. Wringers. ADSHEAD & SONS, Ltd., T. and ADSHEAD, T. W., Angel Street, Dudley, Worcestershire. Dec. 4, 1931, No. 33593. [Class 138 (ii).] A folding wringer is clamped to a board 10 which is pivotally and slidably mounted by metal straps 13 on a bar 8 forming part of the support 1 to which a table cover 23 is pivoted. The straps are provided with slotted lugs 16 in which the cranked ends of stays 18, pivotally mounted on bolts 19 secured to the bar 5 of the support 1, are secured when the wringer is in the working position. Alternatively the stays may be pivotally or slidably mounted on the board 10 and be clamped or fixed to the bar 5 when the wringer is in use.
Patent GB-1592677-A (GB)
Title: Mould and moulding method for producing mounting panels for heating and cooling ducting
IPC: F24D3/14
Filed: 1977-11-25
Abstract: The invention relates to a mounting plate (22) with cams (26) of relatively large diameter and cams (30) of relatively small diameter arranged on one side. These cams are arranged in an alternating manner in mutually parallel rows. Heating-medium and/or coolant tubes (58, 60) are laid between the cams (26, 30). The free space between the cams (26, 30) and their surface are dimensioned such that the tubes are laid as required and, nevertheless, are adequately fixed in their desired position and, furthermore, there is provided a sufficient supporting surface area for metal plates to be laid on the cams. <IMAGE>
Patent GB-618931-A (GB)
Title: Improvements in and relating to the surface treatment of aluminium and aluminium alloys
IPC: C25F3/04
Filed: 1946-11-13
Abstract: 618,931. Electrolytic surface-treatment of aluminium and its alloys. BRITISH ALUMINIUM CO., Ltd., and PULLEN, A. N. D. Nov. 13, 1946, No. 33751. [Class 41] A sheet or other article of aluminium or an aluminium alloy is immersed in an alkaline solution containing a simple or complex phosphate of aluminium and alternating current is passed with the article as an electrode; a diffusing reflecting surface having a protective coating thereon is thereby produced on the article. The solution may be of pH 10 or more and may contain one or more of the carbonates or hydroxides of sodium and potassium. Suitable proportions of aluminium phosphate are from '0.1 to 1 per cent by weight of the solution. Both electrodes may be constituted by articles to be treated. The simple or complex phosphate of aluminium may be introduced as such into the solution or it may be formed in the solution as by including in the solution sodium or potassium orthophosphate and immersing aluminium therein. The aluminium to be treated is preferably of a purity of not less than 99.5 per cent, rolled in such manner as to produce a uniformly small grain size with the minor constituents evenly distributed in the metal. The voltage may be between 10 and 30 volts R.M.S. and the treatment continued for from 20 to 60 minutes in the solution at a temperature of between 40‹ to 65‹ C. Specification 449,162 is referred to.
Patent GB-640477-A (GB)
Title: Production of hydroxy ketones from acetylenic alcohols
IPC: C07C45/26
Filed: 1947-12-22
Abstract: Hydroxyketones are prepared by the hydration of the triple bond of an acetylenic alcohol of the general formula <FORM:0640477/IV (b)/1> wherein R1 and R2 represent alkyl radicals or may together form a hydroaromatic ring, by mixing together an aqueous solution of mercuric sulphate acidified with sulphuric acid with such an alcohol, the mixing being performed wholly at a temperature below 35 DEG  C., and the amount of sulphuric acid including that which is in the form of mercuric sulphate being not over 64.4 grams per one gram molecular proportion of such alcohol, heating said mixture for about two hours to complete the said hydration, steam distilling the hydroxy ketone produced, and thereafter separating the hydroxyketone from the steam distillate. The group R1 may contain a plurality of carbon atoms, and the group R2 may represent the methyl group.  The hydroxyketone may be isolated from the steam distillate by adsorbtion on active charcoal or silica gel, or by extraction with an ester which is insoluble in water, or by azeotropic dehydration with a solvent such as benzene or carbon tetrachloride.  In the examples the following compounds are prepared: 3 : 3-dimethyl-3-hydroxy propanone-2, 1-acetyl-cyclohexanol, 3-isobutyl-3-butanol-2-one, and 3-ethyl-3-butanol-2-one.  The last-named compound is obtained from 3-ethinyl-butinol-3 in admixture with methyl ethyl ketone and an unsaturated ketone of the formula <FORM:0640477/IV (b)/2>
Patent GB-176134-A (GB)
Title: Improvements in and relating to methods of protecting electric transformers
IPC: H02H7/045
Filed: 1920-12-01
Abstract: 176,134. British Thomson - Houston Co., Ltd., and Holbrook, H. S. Dec. 1, 1920. Transformers.-In a circulating-current system for protecting a transformer, in which current transformers 5, 6 are provided in the primary and secondary circuits of the main transformer to be protected, a trip coil 7 being connected in shunt across the secondaries of the transformers 5, 6, a reactance 10 is placed in parallel with the primary 2 of the main transformer and is connected across the terminals of the secondary of the transformer 5 in order to compensate for differences in the ratio of the input and output currents of the main transformer. These differences may be caused by variations in the supply voltage and the load, or by the rush of magnetizing-current which takes place when the main transformer is connected to the supply circuit. The core of the reactance is made of the same material and is worked at the same flux density as that of the main transformer in order that the current taken by the reactance may bear a constant ratio to that taken by the main tranformer. In order that a small reactance may be used, the reactance is preferably connected in series with the secondary 9 of a potential transformer whose primary 8 is in parallel with the primary 2 of the main transformer.
Patent GB-868922-A (GB)
Title: Improvements in or relating to de-misting devices for the rear windows of automobiles
IPC: B60S1/54
Filed: 1956-11-07
Abstract: 868,922. Window demisting devices. RICHARDSON, E. B. Nov. 6, 1957 [Nov. 7, 1956], No. 33952/56. Class 138(1). A demisting device for the rear window of an automobile comprises an air flow distributer 10 mounted adjacent the rear window of the vehicle an air collector 14 clamped in position relative to a vehicle exhaust pipe 15 or silencer 16 so as to make surface contact with the pipe 15 or silencer 16 to effect heating of the collector 14, and a duct 13 connecting the distributer 10 and collector 14 which is mounted (e.g. by straps) in a forwardly-directed position relative to the normal air flow over the vehicle to collect air. An air filter in the collector 14 or duct 13 prevents dust, flies or other objects entering the collector 14 from reaching the distributer 10, and may operate as a heat exchanger relative to the engine exhaust system. By the use of suitable means air flow through the collector 14 may be cut off.
Patent GB-1073028-A (GB)
Title: Method and apparatus for measuring the density of fluids
IPC: G01N9/06
Filed: 1964-08-20
Abstract: 1,073,028. Determining density continuously. MINISTRY OF PETROLEUM & CHEMICAL INDUSTRY, RUMANIA. Aug. 20, 1964 [Aug. 22, 1963], No. 34110/64. Heading G1S. In a method for continuously measuring the density of fluids by measuring the buoyancy of a floating detecting element through which the fluid is flowing continuously, the floating element is immersed in a reference fluid which has a coefficient of expansion substantially the same as that of the fluid being measured, and is subject to the same pressure and temperature conditions as the fluid being measured, the fluid density being measured by continuously comparing the weights of the volumes of the fluid being measured and the reference fluid. In one embodiment, as shown in Fig. 1 the apparatus comprises a U-tube 2, pivotally mounted at 3 by flexible connections 4 and provided with an inlet 1 and outlet 5, the U-tube 2 being immersed in the reference fluid in a pressure vessel 7. An electrical weighing device is provided at 6. A removable cover plate 12 facilitates changing of the reference fluid. In an alternative arrangement, (see Fig. 2, not shown) the inlet and outlet tube are arranged concentrically.
Patent GB-850096-A (GB)
Title: Improvements in or relating to radar systems
Inventor: HUNTER IAN
IPC: G01S1/02
Filed: 1957-11-06
Abstract: 850,096. Pulse radar. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. Aug. 13, 1958 [Nov. 6, 1957], No. 34595/57. Class 40(7). In a pulse radar system comprising a rotating aerial 1 and a main CRT PPI display 23, signals corresponding to targets in a selectable range zone are displayed on an auxiliary CRT 17, as vertical deflections on a horizontal azimuth timebase corresponding to a selectable aximuthal sector; preferably the azimuthal timebase is speeded up in the central portion thereof. As shown the azimuthal timebase is produced by combining the output from a circular potentiometer 6 gauged to the aerial 1 with the output from another circular potentiometer 9 which is adjusted manually in accordance with the centre bearing of the selected sector. The combined outputs are applied directly to the grid of one valve 14 of a cathode-coupled pair 14, 15 and via an amplifier 18 to the grid of one valve 141 ,of another cathode-coupled pair 14<SP>1</SP>, 15<SP>1</SP>, the combined anode outputs from valves 14, 14<SP>1</SP> and 15, 15<SP>1</SP> being applied to the X plates of the auxiliary CRT 17 and to a trigger circuit 21 producing azimuth marker pulses corresponding to the centre of the selected sector which are applied to the PPI display 23 and to the Y plates of the auxiliary CRT 17; if a linear azimuth timebase is required, valves 14<SP>1</SP>, 15<SP>1</SP> are omitted A strobe pulse corresponding to the selectable range zone is generated by a phantastron 24, multiar 25 and blocking oscillator 30, the timing of the pulse being controlled by a potentiometer 27. The strobe pulse is applied as a range marker to the PPI 23 and is also applied together with the echo video pulses to a pentode gate 31, the output pulses therefrom being stretched by a cathode follower 33 and rectifier 34 and applied through a band-pass filter 37 to a bridge rectifier circuit 38 to produce an envelope waveform of the echo signals which is applied to the Y plates of the CRT 17. In a modification, Fig. 2 (not shown), the pulse stretch 33 and bridge rectifier 38 are omitted so that the envelope of the signal displayed on the auxiliary CRT 17 will be "filled in". The gate 31 may also be omitted in which case the range zone selection is effected by applying the strobe pulse to brighten-up the auxiliary CRT 17. In either embodiment the CRT 17 may be blacked out when the aerial 1 is directed outside the selected sector by means of a control pulse derived from the voltage produced at the anodes of valves 14 and 15.