baber/WOPTO huggingface dataset:
Patent GB-1450911-A (GB)
Title: Laser doppler velocimetry
IPC: G01P5/26
Filed: 1973-01-17
Abstract: 1450911 Measuring fluid velocity photoelectrically NATIONAL RESEARCH DEVELOPMENT CORP 21 Feb 1974 [17 Jan 1973] 2416/73 Heading G1A [Also in Division H4] In a fluid-flow velocity meter radiation from a coherent source is split into two beams which are directed to intersect at the measurement area where they are scattered by particles in the fluidflow to a detector connected to processing circuitry, the radiation source emitting very short pulses and the detector arrangement using a range gating technique to eliminate interference from objects other than the sample. The detector signal can be considered to be due to the passage of the particles through a fringe  pattern caused by interference of the two beams, or to a difference Doppler shift between the beams scattered from the particles. As shown, Fig. 1, radiation from a phase locked visible or I.R. laser 3 is split into two beams 6, 7 by a cube 4 and directed to a measuring location within a wind tunnel 1. As dust particles in the air-flow pass through the intersection of the beams radiation is scattered to a photo-multiplier 10 feeding a correlator 12 which determines the fluid velocity. In order to reduce interference caused by reflections from the window 2 and the walls of the tunnel &c. the laser is pulsed and a synchronizing signal is passed through a variable delay 17 to an AND gate 11 so that the detector signal is passed to the correlator only at instants corresponding to the range of the measuring location. The measuring location may be scanned across the tunnel by adjusting lens 5 a corresponding variation in the time delay also being made. Instead of gating the signal the photo-multiplier itself may be gated or an optical shutter 19 e.g. a Kerr cell may be provided. The synchronizing signal is derived from a detector 14 operating the laser phase locking arrangement but may also be obtained from a photodiode illuminated by the laser beam. In a modification the radiation scattered directly back towards the laser is separated using a polarizing beam splitter and quarter wave plate arrangement, Fig. 5 (not shown). This 180 degrees backscatter arrangement may be used to measure the flow-rate in furnaces, the flow from a jet or rocket engine across an airfield or for detecting clear air turbulence in front of an aircraft. The forward scattered radiation may alternatively be detected.
Patent GB-1404151-A (GB)
Title: Buildings of solidifiable foamed material
IPC: E04G11/04
Filed: 1972-01-18
Abstract: 1404151 Constructing domed buildings of foamed material R GRAY 28 July 1972 [30 July 1971 18 Jan 1972] 35990/71 and 2450/72 Headings E1A and E1S A dome-shaped building is cast in a foamed material by a travelling mould 2 which comprises a pair of parallel articulated shutters 6 having a double curvature, foaming reactants being fed through a travelling nozzle into the front of the mould which moves at a speed such that solid foamed material is left by the rear of the mould to form part of the shelf of the dome. The curvature of the shutters is changed as the mould is elevated towards the apex of the dome, laying superimposed rings of foamed material. The mould may be mounted on a rotatable arm 3 pivoted at the base of a central mast, for a hemispherical dome (Fig 13, not shown); or it may be mounted on a short arm or a trolley which runs along a beam shaped as a quadrant of an ellipse and rotatable around the central mast, for a hemi-ellipsoidal dome (Fig 15, not shown) The arm is retractable so that the mould may be lowered through an opening left at the apex of the dome, which opening is then covered with a cap. The shutters may comprise relatively rotatable convex or concave spherical segments and intermediate pieces (Fig 18, not shown) and are connected by yokes. The shutters may be elastic to permit flexing, and a fluted dome may be formed by deflecting the shutters along a wavy path as the mould rotates, by yokes connected to cam followers engaging a corrugated cam surface on the central mast, (Fig 22, not shown). Foil sheets 8 may be fed into the mould from rolls 9 mounted at the front, to line the shutters and to be applied to the surfaces of the building. Arrangments of several interconnected domes are described Figs 10 and 11, not shown).
Patent GB-1304052-A (GB)
IPC: F15B5/00
Filed: 1970-01-19
Abstract: 1304052 Pressure measuring device CORNING GLASS WORKS 19 Jan 1970 [21 Jan 1969] 2458/70 Heading G1L A device for measuring pressure comprises a resiliently biased piston 16 carrying a target 20, a nozzle 12 for issuing a stream of sensing fluid to determine by the back pressure produced in the nozzle the distance between nozzle and target, a biasing member 26 co-operating with the piston o maintain the said distance constant in the absence of a pressure to be measured and for opposing movement of the piston in response to a pressure to be measured.
Patent GB-194084-A (GB)
Title: Improvements in and relating to lay operating mechanism for looms
IPC: D03D49/60
Filed: 1922-01-27
Abstract: 194,084. White, A. E., (Huyck & Sons, F. C.). Jan. 27, 1922 . Beat-up motions.-A bar 2 parallel to the lay 4 is reciprocated endways to give a beat-up motion to the lay through a series of bell-crank levers 10 and links 14. A cam 16, Fig. 3, operates a lever 22 to reciprocate the bar 2 while a heavy spring 26, Fig. 1, connected to the bar and to a bracket 28 recessed to the breast beam gives the bar 2 its return movement. The links 14 are made in sections connected by turn-buckles 30 for adjustment.
Patent GB-547432-A (GB)
Title: Improvements in the recording of photographic images and sensitive materials therefor
IPC: G03C1/035
Filed: 1941-02-25
Abstract: 547,432. Photographic multi-contrast material. KODAK, Ltd., BAINES, H., and DAVEY, E. P. Feb. 25, 1941, No. 2533. Drawings to Specification. [Class 98 (ii)] Light-sensitive multi-contrast printing material has a layer comprising a mixture of two sensitive silver salt emulsions of which one (A) gives at its maximum development time a gradation of less than 1.8 and the other (B) a gradation of at least 2.5 greater and whose sensitivities are such that when they are developed for time equal to the maximum development time of emulsion (B) the exposure required to produce a density of 0.1 in emulsion (A) is greater than that required to produce such density in emulsion (B) and when they are developed for a time equal to the maximum development time of emulsion (A) the exposure required to produce a density of 1.0 .in emulsion (B) is greater than that required to produce a density of 1.0 in emulsion (A). In a modification, the emulsions may be coated one over the other instead of being mixed. The emulsions may have percentage silver bromide or silver chloride contents, calculated on their respective total silver halide contents, which do not differ by more than 10. The material may have a layer comprising a mixture of two or more silver halide emulsions which gives a gradation of at least 3.0 on relatively short development and in which on continuing the development the .gradation falls to less than 1.8. The emulsions may also be coated in superimposed layers. A formula for a standard developer is given. The emulsions need not be mixed in equal proportions. The emulsions may comprise silver bromide, silver chloride, or silver chlorobromide emulsions, and may contain silver iodide. The emulsion binder may be gelatine, cellulose esters, or resins, e.g. polyvinyl alcohol, or mixtures thereof, and a different binder may be used for each emulsion. One or more of the emulsions to be mixed may be made by the methods described in Specifications 540,451, 540,464, 541,510, 541,511, 541,512, 541,513, 541,514, 541,515, 544,134 and 549,956. A substance which causes the rate of development to be increased or decreased may be incorporated in an emulsion, and before such emulsion is brought into contact with another emulsion, it may be treated with a resin or other agent to reduce the tendency of the substance to wander.
Patent GB-1073995-A (GB)
Title: Improvements in or relating to chart position indicating apparatus
Inventor: THOMPSON EDWARD ERNEST
IPC: G01S1/02
Filed: 1965-01-20
Abstract: 1,073,995. Course recording and position indicating apparatus. DECCA Ltd. Jan. 12, 1966 [Jan. 20, 1965], No.2558/65. Headings G1F and G1J. In chart position indicating apparatus for use with a radio navigation system providing signals representing at least one co-ordinate of position of a mobile craft, and having a chart in the form of a strip carried on two spools so as to be movable to and fro in one direction relative to an index, a direct current motor is provided for driving the spools and this motor is energized by a succession of pulses, whose mark to space ratio is variable i.e. it can be one of two fixed values, depending on the required speed of movement of the chart, the pulse repetition frequency being substantially greater than the dominant mechanised resonant frequency of the spools and chart, which is to some extent resilient, so that the chart is moved substantially continuously by the motor. The chart and spool arrangement is as described in Specification 1,073,991 the chart strip having at one edge a plurality of digitally coded tracks of opaque markings, the apparatus being provided with a photo-electric detection system allowing the actual position of the chart to be compared with the craft position as detected by the radio navigation system, preferably a hyperbolic navigation system. The system of chart and spools when driven by a pulsed motor has a certain resonant frequency and if the pulse frequency corresponds closely to this frequency the chart will oscillate to and fro. The pulse frequency is thus increased to prevent this effect and the mark to space ratio of the pulses can have one of two fixed values depending on the desired drive rate for the chart. The motor may also be driven continuously if a coarse adjustment of the chart is required. The system operates automatically from the signals received from the radio navigation system and arrangements are described whereby the chart is driven at the correct speed and is positioned correctly so that the index indicates the craft position in the coordinate direction represented by the chart movement. A transistor switching bridge circuit is also provided to prevent overshoot of the motor drive between the pulses.
Patent GB-450870-A (GB)
Title: Improvements in and relating to roadway supports, for use in coal mines and the like
IPC: E21D11/24
Filed: 1935-01-26
Abstract: 450,870. Mine-arch supports. TAYLOR, E., 9, Ravensworth Crescent, Low Fell, Gateshead, WOOD, H. N., Sun Buildings, Newcastle-on-Tyne, MOLL, W., Witten, Ruhr, Westphalia, Germany, and WOOD & CO., Ltd., H., Sun Buildings, Newcastle-on-Tyne. Jan. 26, 1935, No. 2598. [Class 20 (ii)] Mine-arch supports comprise strut sections with resilient packing between the sections, and clamping bands around the packing to prevent lateral movement of the ends of the sections. The resilient packing is formed as a tubular member 1 packed with sand, wood, or cork, or like material, and the ends of the curved strut sections 7 are shaped to fit around the packing, and abut against the bands 3, which are secured to the packing by flanges 3<a> slotted to receive the ends of the struts and so prevent lateral movement of the struts. In a modification, further packing 10, 10<a>, Fig. 4 may be interposed between the ends of the struts and the jointing member and an enlarged clamping band 12 formed on two hinged parts surrounds the outer packing, the flanges of the section supports 7 being bolted or welded to the projecting flanges of the band. The other ends of the strut sections abut on clamping bands 8 which surround bearing members 1 supported by uprights 9.
Patent GB-545850-A (GB)
Title: Improvements in and relating to change speed gearing for lathes and other machines
IPC: B23Q5/14
Filed: 1941-02-26
Abstract: 545,850. Variable-speed gearing. ROLLO, J. M. Feb. 26, 1941, No. 2611. [Class 80 (ii)] A variable-speed gear has compound gear wheels 4 . . . 11 mounted on a driving shaft 1 and on a lay shaft 3. The large gears 4, 6, 8, are all of the same diameter. All the wheels are free on the shafts except the first wheel 4, 5, on the driving shaft 1 which is fixed thereto. A slidable take-off gear 12 splined to a driven shaft 2 can be moved to engage the large gears 4, 8, successively to obtain varying speeds. The gearing is preferably such that each successive speed is half the previous speed and is applicable to lathes and other machines.
Patent GB-269824-A (GB)
Title: Improvements in or in connection with depth gauge devices
IPC: G01F23/16
Filed: 1927-01-29
Abstract: 269,824. Allison, A., and Napier, G. A. Jan. 29, 1927. Indicators actuated by pressure of head of liquid.-In a depth gauge of the type in which the depth is indicated by the pressure required to force air through an open-ended pipe extending to the required depth, the air is replenished as required by a hand pump e and a valve device h is provided to place either the pump e or the gauge g in communication with the immersed pipe d. The valve casing h is provided with couplings, i to the gauge g, j to the pump e, and c to the immersed pipe d. The passages j is provided with a non-return valve k. and in the position shown, the non-return valve m prevents passage of air from the pump e to the gauge g or pipe d while placing the two latter in communication. A hand-operated screw-down valve s is adapted to close the passage o leading to the chamber q and coupling i, and at the same time to push the valve m off its seating to allow air to pass through the passage p to the pipe d. The back of the valve s is provided with a leakagepreventing ring t which seats against the casing.
Patent GB-261223-A (GB)
Title: Improvements in driving mechanism for building motions of spinning, twisting and analogous machines
IPC: D01H1/36
Filed: 1926-01-29
Abstract: 261,223. Smith, W. Prince-, and Waterhouse, D. Jan. 29, 1926. Building-motions.-In a spinning, twisting, or like machine, the elements constituting the driving- mechanism for the building-motion are mounted upon a cast-iron frame 13 secured to the end stand 10 of the machine whereby the bearings are rigidly located, the builder driving mechanism comprises a selfcontained unit, and the necessity for adjustment is obviated. The invention is described as applied to a " Scaife's building-motion. The building-motion is driven from the main shaft 17, Fig. 1, through a sprocket wheel 14, the spindle 18 of which is mounted adjustably in a vertical slot 19 in the frame 13. Coaxial with the wheel 14 is a change wheel 20, which drives an adjustable pinion 21 meshing with a second change wheel 24 carried on a spindle 25, which latter also carries a worm 28 engaging a worm wheel 29 on a shaft 30, Fig. 4, upon which is also mounted a worm engaging a worm wheel 32 keyed upon the heart-cam shaft 33 of the building-motion. A second worm 34 on the shaft 33 engages a worm wheel 35 carried by an arbor 36, Fig. 2, on which is also removably mounted a change wheel 38 engaging a pinion 39 carried on an arbor 40 adjustably mounted in a slot 41 in the frame 13. The pinion 39 drives a change wheel 42 mounted on the screw shaft 43 of the building-motion. The frame 13 is slotted at 45 and faced at 46 to receive the building- motion bracket 47.
Patent GB-454205-A (GB)
Title: Improvements in die mechanism for mounting bushings
IPC: B21D51/40
Filed: 1936-01-29
Abstract: 454,205. Fixing bung sockets &c. TENNANT, W. J., 111, Hatton Garden, London.-(American Flange & Manufacturing Co., Inc. ; 4646, Arthington Street, Chicago, U.S.A.) Jan. 29, 1936, No. 2723. [Class 83 (iv)] [See also Group XVII] A flanged bung socket or like is secured to the flat end of a barrel or like bv one downward stroke of concentric dies which cut out a hole in the sheet, force it over the socket flange and locate it and then curl over the top edge of the socket to secure the socket in position, Fig. 7 shows the socket 12 secured in the flat sheet 10, the joint having a gasket ring 30. In Fig. 4 the punch 25 has cut out a hole in the sheet, and the die ring 27 is forcing the sheet over the socket 12 which results in flanging the sheet against the socket as in Fig. 5. The curling anvil 24 now advances to curl the top edge of the socket over the flange to complete the operation, the sheet being held in the dies between the ring 19 and the die ring 27. The socket may be octagonal to prevent rotation in use. U.S.A. Specification 1,982,145 is referred to.
Patent GB-573817-A (GB)
Title: Improvements in and relating to the control of electric motors for winches and like hoisting machinery
IPC: B66D1/12
Filed: 1943-02-18
Abstract: 573,817. Control of D.C. motors. BROWN, H. B., SAYER, C. M., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. Feb. 18, 1943, No. 2734. [Class 38 (iii)] A winch motor MA is operated for hoisting with a series field SF partially opposed by a shunt field SHF giving an excitation about one quarter of that due to full load current in the series field, and is operated for lowering with the shunt field only. These connections give very high speed lifts with light loads and stability during lowering. With the manual controller in "off" position, contact OP is closed, energising no-volt coil B, which is maintained over b1 and at b completes the circuit of the shunt field and of a brake coil BHC which allows a mechanical brake to be released. Movement of the controller through " lifting " notches causes contactors l, f, a1, a2, a3 to close. Movement of controller through " lowering " notches causes contactors l, s, f, a1 to close and finally f to reopen to give weak field operation. The controller may be of the type disclosed in Specification 573,818.
Patent GB-279688-A (GB)
Title: Improvements in means for automatically indicating the head or height or the volume of liquid in a container
IPC: B60K15/06
Filed: 1927-02-01
Abstract: 279,688. Rodman, J. B. Feb. 1, 1927. Indicators actuated by pressure of head of liquid.-A means for indicating the head or volume of liquid in a container C comprises a vessel A located at the bottom of the container and communicating at A<2> with the liquid therein, and at A<3> with a second vessel D which in turn communicates with a pipe E of small bore having an indicating gauge F at the end thereof. Glycerine or like liquid of suitable specific gravity G partly fills the two vessels A, D which are fianged inwardly as shown for intercommunication. Fig. 2 shows a modified form of the apparatus in which the vessel D<1> is of double conical formation to more accurately compensate for temperature effects in the system. An increase of temperature and consequent expansion of fluid in the upper part of the vessel D<1> tending to lower the level of liquid therein, is compensated for, by the rapid increase of surface acted on, and vice versa. In a further modification for ensuring a correct reading until the tank C is practically empty, the contanier A communicates at the top through a pipe which is led therefrom to the bottom of the tank. Specification 259,661 is referred to.
Patent GB-907565-A (GB)
Title: Improvements in temperature responsive control
Inventor: STROBEL CHARLES KENNEDY
IPC: G05D23/24
Filed: 1959-01-26
Abstract: 907,565. Automatic temperature control systems. ROBERTSHAW-FULTON CONTROLS CO. Jan. 26, 1959 [May 9, 1958], No. 2809/59. Class 38 (4). In a system for automatically controlling the temperature of a cooking vessel supported relative to an electric heating element, a switch mechanism which is electrically controlled in dependence on the actual and desired temperatures of the cooking vessel, controls a further switch in the heating element circuit. In Fig. 1 a cooking vessel 12 is heated by a surface heating element 10 supplied from a source S1. A temperature variable resistance 50, located so as to be responsive to the temperature of the bottom of the cooking vessel, forms a variable shunt to a heating winding 54 of a bimetal strip 26 so that when the temperature has risen to a desired value a contact 34 is separated from a contact 36 to de-energize a relay 22 and interrupt the supply to heater 10. Thereafter relay 22 is operated intermittently to maintain the temperature of the cooking vessel at the desired value. This value is set by means of a rheostat 60 in shunt with a heating winding 64 of a bimetal strip 28 carrying contact 36. Both bimetal strips tend to move in the same direction when heated so that the effect of ambient temperature variation is eliminated. The two heaters 54, 64 are supplied in parallel from the same source S2 through matched circuits so that the effects of source voltage variation is eliminated. In a modification, the energization of windings 54, 64 is controlled by series resistances and electromagnetic relay 22 is replaced by a thermally-operated bimetal relay.
Patent GB-1044552-A (GB)
Title: Improvements in or relating to photo-electric detecting devices
Inventor: PHILLIPSON ALAN
IPC: G01V8/12
Filed: 1964-01-22
Abstract: 1,044,552. Counting-apparatus. DECCA Ltd. Jan. 18, 1965 [Jan. 22, 1964; Match 31, 1964; May 12, 1964; Nov. 25, 1964], Nos. 2829/64, 13202/64, 19787/64 and 47995/64. Heading G4D. Articles to be counted pass through an aperture 14 between a pair of mirrors 16, 17 between which a beam of light is reflected a sufficient number of times as to cover the whole aperture, interception of the beam stepping on a counter. Light from a source 21 passes through lens 22 to a mirror 23 to be reflected to and fro between plane mirrors 17, 16 a number of times before passing to concave mirror 24 and photo-cell 26. Interception by a seed, ballbearing, hollow ring or large flat object produces waveforms of different characteristics which are smoothed and integrated in known manner (Figs. 4 and 5, not shown), before application to a counter. Batching may take place with the feed slowed down at the approach of the end of a batch. For large apertures a laser 34 may be used. Alternatively, (3-rays may be directed on to a phosphor. Two devices may be used for measuring velocity of the article to be counted. The device may count articles of various sizes, the electronic circuit being adjusted for sensitivity accordingly.
Patent GB-838873-A (GB)
Title: Improvements relating to motor-cycle front forks incorporating hydraulic dampers
Inventor: STOCK CHARLES SAMUEL ROBERTS
IPC: B62K25/08
Filed: 1956-01-28
Abstract: 838,873. Hydraulic shock absorbers. GIRLING Ltd. April 29, 1957 [Jan. 28, 1956], No. 2839/56. Class 108(3) [Also in XXXI] A motor cycle front fork (see Group XXXI) comprises an hydraulic cylinder 21 rigid with an outer concentric cylinder 10 which itself is telescopically mounted in an outer tube 11. A piston 22 on a rod 23 rigid with the tube 11 has valves (Fig. 4, not shown) controlling flow in both directions. A recuperation chamber 39 defined by a flexible sheath 39 is separated from the cylinder by partition 36 having a control valve 38. In a modification (Figs. 1, 2, not shown), the sheath 39 is replaced by an extension of the cylinder 21. The partition 36 is then carried on the lower end of a rod, the upper end of which is rigid with a closure member for the extension of the cylinder 21. This rod may carry a plate to baffle liquid flow in the reservoir.