baber/WOPTO huggingface dataset:
Patent GB-1343134-A (GB)
Title: System for measuring the level of materials
Inventor: MALTBY FREDERICK L
IPC: G01F23/26
Filed: 1971-04-27
Abstract: 1343134 Measuring material levels electrically DREXELBROOK CONTROLS Inc 27 April 1971 [27 April 1970] 11688/71 Heading G1N The level of a material in a container is determined by noting the variation of capacity between a probe and conductive member due to the material, the probe including a guard shield. An R. F. energized copacitive bridge circuit 17, 18 19 includes in one arm thereof the capacitance 20 between the probe and conductive container or earth if the container is of insulating material. In accordance with the invention the output amplifier 25 is connected across capacitor 22 so that if the input impedance of amplifier 25 changes only the slope of the output voltage/capacitance characteristic changes and no change in capacitance for balancing the bridge is necessary. One of the connections to amplifier 25 includes operational amplifier 25 which maintains the guard shield of the probe at the same potential as the measuring electrode when the bridge is balanced. The output from the amplifier 25 is applied via phase sensitive detector 26 to a relay 39 operating circuit which drops out when the level of the material exceeds a high level or falls below a given level. Circuit 40 de-energizes the relay 39 if the deposit of foreign material on the probe causes the resultant difference in potential between the measuring electrode and guard shield to be too great. Probe construction The probe may include a central cylindrical measuring electrode surrounded over most of its length by a tubular guard shield Fig. 1 (not shown). Alternatively the probe may be flush for mounting on the side of the container and comprises a central rectangular measuring electrode surrounded by a rectangular frame guard shield Fig. 3 (not shown). The electrodes and shield may be plane and arranged parallel to each other Fig.4 (not shown).
Patent GB-502219-A (GB)
Title: Improvements in or relating to safety shutters for motion picture apparatus
IPC: G03B21/18
Filed: 1938-04-19
Abstract: 502,219. Kinematograph projectors. KODAK, Ltd. April 19, 1938, No. 11698. Convention date, April 23, 1937. [Class 97 (i)] A safety screen connected to the shutter shaft to be moved thereby to uncover the projection aperture when the shaft attains a predetermined speed is controlled by a cantilever spring which offers a comparatively small resistance to the initial movement of the screen, but increasing resistance to any additional movement thereof. As shown, the screen 36 is attached to a ring 35 connected to a central portion 33 loosely pivoted between shoulders 39, 40, Fig. 4, on a cylindrical bearing 23 loosely fitting over a nut 18 connected to the shaft 12 baring the intermittent shutter 19. The bearing 23 is pressed by a spring 27 against a pair of bell-cranks 28, 29 pivoted on a pin 30, each bell-crank having a weight 31 at one end and a cam surface 32 at the other. The screen portion 33 has an extension 42, Fig. 2, having a grooved stud 43 engaging the looped end 47 of a pivoted cantilever spring 45. In operation, as the speed of the shaft 12 increases the bell-cranks pivot outwards, and the cam surfaces 32 press the bearing 23 towards the shutter 19 until resilient tongues 34 engage the shutter causing the screen to rotate against the action of the spring 45, the looped end 47 of which provides a stop. In the position of rest, the tongues 34 may be spaced from the shutter or in contact therewith, and the screen may be of copper wire, mica, or slotted metal.
Patent GB-898430-A (GB)
Title: Improvements in and relating to means for removably securing a bayonet or other additional element to a rifle
IPC: F41C27/18
Filed: 1961-03-30
Abstract: 898,430. Mounting bayonets and sights on rifles. STAATSBEDRIJF ARTILLERIE INRICHTINGEN. March 30, 1961 [March 31, 1960], No. 11708/61. Class 119. Relates to means for mounting an element such as a sight or a bayonet on a rifle so as to permit relative forward movement of the element with respect to the rifle during recoil of the rifle on firing. As shown a bayonet 2 is secured to a rifle barrel 1 by means of a plate 3 and by a T-shaped groove 4 in the bayonet handle engaging a T-shaped projection 5 on the barrel 1. A bolt 6 on a pin 8 loaded by a spring 9 engages a recess 7 in the projection 5 and locks the bayonet in longitudinal direction. The bolt 6 is provided with an inclined ramp 10 whereby the bayonet may be placed on the barrel without depressing the pin 8. The recess 7 is provided with an inclined bottom portion 12 and has a width greater than that of the bolt 6. The bayonet is normally held in its rearmost position determined by an abutment 11 on the rifle under the action of spring 9. On firing and recoil the bolt 6 rides up the inclined portion 12 and thus the bayonet moves forwardly relative to the rifle.
Patent GB-427764-A (GB)
Title: Improvements relating to the reinforcing of laths for mattresses
IPC: A47C23/06
Filed: 1934-04-19
Abstract: 427,764. Mattresses. HILTON, J., 74, Townsend Street, Dublin. April 19, 1934, No. 11770. [Class 52 (iv)] The laths forming the foundation for an upholstery spring assembly are thickened or reinforced at the positions of greater load. The strengths of the upholstery springs may also be increased at such positions. The laths may be reinforced by short laths secured thereto, or they may be made of tapering section, thickening section, thickening towards the centre. Specifications 104,787 and 284,501, [both in Class 52 (iv)], are referred to.
Patent GB-117975-A (GB)
IPC: A01K75/06
Abstract: 117,975. Miles, W. H. Aug. 24, 1917. Trawling-gear.-The bobbin a and the bosom rope, chain, or wire l are detachably connected by pairs of connected braces e, h having an eye or loop at each end, one brace e being bent around the bobbin and having its ends seized together by wire binding g or otherwise, and the other brace h being threaded through the free eye f of the bobbin brace and connected directly or through a chain to the bosom rope &c. l. The braces e are arranged in grooves on the bobbin.
Patent GB-308908-A (GB)
Title: Improvements relating to shade fittings for electric and other lamps
IPC: F21V17/00
Filed: 1928-04-21
Abstract: 308,908. Best & Lloyd, Ltd., and Morris, W. April 21, 1928. Shades.-In a lampshade comprising a plurality of depending glass or other plates, strips, or the like, the ends of the plates are individually engaged with independent anchorages and a locking member is provided to prevent accidental detachment of the plates. In the form shown in the Figures, holes, notches, or shoulders d at or near the opposite edges of the upper ends of the plates a engage with projections c formed on the inclined sides of a polygonal inner member b. The outer sides of the plates are engaged by an outer resilient member e of somewhat similar shape, but shorter than, the inner member b, the members b, e being secured together by the lamp holder f. The locking member comprises an upper cover part g and finger-like extensions h which cover portions of the abutting edges of the plates. The locking member may be kept in position by its own weight or it may be combined with a cord-grip for securing it to the flexible conductor.
Patent GB-705573-A (GB)
Title: Improvements in tea-pots and like utensils
IPC: A47G19/14
Filed: 1950-05-11
Abstract: 705,573. Lids for hollow-ware. KACZKOWSKI, C. J. May 11, 1951 [May 11, 1950], No. 11819/50. Class 66 The lid of a teapot or like utensil is provided with a flange 1 perforated to act as a strainer and provided with a ridge 2 which fits into a groove 3 in the container to position the lid correctly. The bottom of the container is provided with a cavity which can accommodate the knob of the lid and thus facilitate stacking of a number of teapots &c.
Patent GB-903807-A (GB)
Title: Improvements in or relating to thermosensitive switches
IPC: H01H37/04
Filed: 1960-04-04
Abstract: 903,807. Temperature-responsive actuating elements. TAYLOR, E. H. April 21, 1961 [April 4, 1960], No. 11825/60. Class 64 (2). [Also in Group XXXVII] A contact-carrying bimetal 1, as in Specification 657,434, is mounted on a member 4 permanently embedded in an insulating block 8. The latter may be moulded around member 4, or can be made from a number of blocks between which member 4 is inserted, the blocks then being fused or adhesively secured together. The block may be of nylon, " Mycolex " (Registered Trade Mark), polystyrene, polycarbonate, polyester or urea-formaldehyde.
Patent GB-217714-A (GB)
Title: Improvements in or relating to draw off devices for liquids
IPC: B67D3/04
Filed: 1923-05-02
Abstract: 217,714. McGown, R. O. May 2, 1923. Tapping.-A device for drawing off liquids from vats, barrels, &c. comprises a flexible pipe B, having its lower end secured to a tap D and provided at its upper end with a flat adjustable-float C adapted to maintain the inlet end of the pipe at a constant distance below the surface of the liquid. A strainer A is secured to or mounted on the inlet end of the tube.
Patent GB-543362-A (GB)
Title: Improvements in the production of bent tubes
IPC: B21D7/00
Filed: 1940-07-19
Abstract: 543,362. Angular bending. BLACKBURN AIRCRAFT, Ltd., and NIVISON, D. B. July 19, 1940, No. 11921. [Class 83 (iv)] In bending tubes relative movement is caused between the tube and a shaping, die of gradually increasing curvature developing ultimately the formation required to be imparted to the tube. The tube may be previously loaded with a coil spring or with a liquid or solid filling such as resin which may be melted out after bending. The fixer die 32 is provided with slots 34, 35 through which slide the limbs 341, 351 of the movable die, the limbs being of gradually increasing curvature and moving the tube 22A transversely with respect thereto. The limb 341 eventually bends the tube against the surface 39 and the limb 351 bends it round in the cut away portion 43 until the movable die is fully engaged with the fixed die. In Fig. 6 the fixed die consists of a number of spaced sections 45 of gradually increasing curvature which are mounted against a back plate 47 on a base board 46. Over this is placed a guide box 48, Fig. 5, formed with similar spaced sections 50 leaving a space 51, Fig. 9, therebetween for the tube 22B. The die and box are provided with locating battens 56, 57. The tube is pushed through the space 51 to rest on the top of the sections 45. A pressure member 55 housing sections 53 fitting the spaces between adjoining sections 45, 50 is then moved down so as to put the tube above the path 51 to effect the bend. The fixed die may be provided with a block 52 having a face 59 to give an upward sweep to the tube. This may be arranged at one side or intermediately. A downward sweep could be given by recessing the base board. The other side may have a re-entrant face 451 and a cut away surface 471. The section 54 of the pressure member engages the tube between the last two sections 53. The tubes may be greased to facilitate sliding of the work with respect to the die or the discs may be spaced with lead or zinc for a similar purpose.
Patent GB-978503-A (GB)
Title: Improvements relating to velocity sensitive actuating devices
Inventor: ROWE JAMES HOWARD
IPC: G01P1/10
Filed: 1960-04-05
Abstract: 978,503. Speedometers. INERTIA SWITCH Ltd. April 5, 1961 [April 5, 1960], No. 12005/60. Heading G1K. [Also in Division H2] A velocity sensitive actuating device for an electric switch, fluid valve, condenser element or potentiometer comprises a rotatable shaft 113 carrying a conducting disc 115 which passes between permanent magnets 119 on plates 117, 118. The eddy-currents set up on rotation of the disc 115 cause rotation in the same direction of the assembly 116 comprising magnets 119, plates 117, 118 and connecting straps 120. The axes of the shaft 113 and assembly 116 are close together and the plate 117 has a projection (not shown) for operation of a microswitch.
Patent GB-223512-A (GB)
Title: Improvements in cushion connections for the springs of motor vehicles
IPC: B60G11/42
Filed: 1924-05-15
Abstract: 223,512. Imray, O. Y., (International Motor Co.). May 15, 1924. India-rubber and like springs; resilient shackle.-A connection between the spring b and the frame of a motor vehicle comprises a block c of yielding non-metallic material, such as indiarubber, into which the end of the spring b extends and resilient reinforcing members moulded within the block at predetermined points to resist the stresses imposed on the non-metallic material. The block c is held in compression within a housing secured to the vehicle frame, and as shown in Fig. 2, is provided with a strong metallic coiled spring d at the part where the load is transmitted to the spring band with lighter coiled springs d<1>, d<2> at other parts. Bent flat springs D<1>, Fig. 4, may be used instead of the coiled springs and may be formed in one piece, as shown, or in three separate pieces. A metal seat b for the block may be carried by the spring b.
Patent GB-798829-A (GB)
Title: A process of manufacturing briquettes, particularly fuel briquettes
IPC: C10L5/14
Filed: 1955-04-26
Abstract: 798,829. Composition fuel. NAAMLOOZE VENNOOTSCHAP BRIKO. April 26, 1955 [April 26, 1954], No. 12052/55. Class 50. A starting material such as coal dust is intimately mixed with a single binding agent consisting of the conversion product prepared by treating one or more higher carbohydrates or carbohydrate ethers in finely divided dry condition with a concentrated low molecular weight aliphatic monocarboxylic acid in liquid or gaseous form, the mixture being thereupon briquetted under pressure, and dried. The product prepared from the carbohydrate or carbohydrate ether may be mixed with an artificial resin similarly treated with acid. Solid paraffin wax or kernel oil may be added as a water-repellant. In an example, 20 Kg. of potato starch are mixed with 2.7 Kg. of 80 per cent acetic acid and the mixture heated to 175‹ C. 2 Kg. of polyvinyl acetate are mixed with 2.5 Kg. of 80 per cent acetic acid and heated to 60‹ C. Both products are mixed well and 0.6 Kg. of solid paraffin wax added.. All this is then mixed with 1,000 Kg. of coal dust, heated to 90‹ C., briquetted and dried in air. In another example, the mixture is dispersed in water or an aqueous liquid before adding to the coal dust. Specification 794,569, [Group V], and 798,828 are referred to.
Patent GB-306329-A (GB)
Title: Improvements in cameras for three-colour photography
IPC: G02B27/14
Filed: 1928-04-25
Abstract: 306,329. Soc. Anon. Splendicolor, and Didier, L. J. B. April 25, 1928, Three-colour systems.- In a triple lens camera for three-colour photography a prism and a semi-transparent reflector are employed to bring into coincidence the optical axes of the lenses corresponding to the red and green images. The lenses 2, 3, 4 produce the green, orangered, and blue-violet images respectively on the plates 5, 6, 7, colour screens 8, 9 being associated with the lenses 3, 2. To bring the axes of the lenses 2, 3 into coincidence a reflecting prism 10 and a semi-transparent reflector 11 are employed. The reactor 11 may be produced by cementing together two prisms 12, 13. the cemented surface being coated with a very thin deposit of platinum or with a non- continuous deposit of silver. A glass plate 17 can be placed in front of the lens 4 to equalize, as far as possible, the optical paths of the three sets of rays. The apparatus can be used for colour kinematography, the plates 5, 6, 7 being replaced by three simultaneously-driven films.
Patent GB-383879-A (GB)
Title: Electromagnetic oscillating device with freely oscillating armature
IPC: H04R11/00
Filed: 1932-04-27
Abstract: 383,879. Loud-speakers &c. BRITISH GOLDRING PRODUCTS, Ltd., 119, Finsbury Pavement, London. April 27, 1932, No. 12129. Convention date, Jan. 29. [Class 40 (iv).] Relates to electromagnetic oscillating devices, particularly loud-speakers, of the type in which the armature oscillates freely outside and adjacent to the air gap between the magnet poles. According to the invention, in order that the magnetic flux acting on the armature may be constant, independently of the position of the armature, the direction of the free end b of the armature and the direction of the edges of the air gap c that are adjacent thereto are mutually displaced around the central longitudinal axis of the armature. In the construction shown, the air gap is parallel to the axis of oscillation of the armature, which is clamped at its end d, the armature being twisted to give its end the required inclination to the air gap. Alternatively, the end of the armature may be parallel to the axis of oscillation, and the air gap inclined thereto. The pole-pieces may be adjustable, for varying the width of the gap. A rod f connects the armature to a diaphragm.
Patent GB-559097-A (GB)
Title: Improvements in or relating to means for use in signalling a fall or fall and rise in temperature
IPC: G01K5/62
Filed: 1942-08-28
Abstract: 559,097. Thermal switches. GRIFFITHS, G. Aug. 28, 1942, No. 12129. [Class 38 (v)] A temperature alarm switch comprises a bimetal strip secured at one end to the rear of a dial 2, the free end moving a finger 5 over a scale until it meets a further contact comprising a wire 9 fixed in and projecting through an insulating bush 10 in the dial, at an appropriate low temperature. There may also be a similar wire 11 in a bush 12 to close the alarm circuit at a higher temperature. In a modification. Fig. 4, the casing 13 is of insulating material, a low temperature alarm may be fitted, as in the previous example, but the high temperature contact is adjustable as by providing a cranked arm 25 pivoted in the dial so that its contact end may be moved to any desired temperature. Various methods of arranging so that the adjustable contact can operate as a low temperature alarm by swinging it to the other side of the indicating finger 16, are described, together with a testing push switch.
Patent GB-1260448-A (GB)
Title: Bipolar electrode
IPC: H01M4/00
Filed: 1970-03-13
Abstract: 1,260,448. Electrodes. YARDLEY INTERNATIONAL CORP. 13 March, 1970 [17 March, 1969], No. 12241/70. Heading B2E. [Also in Divisions B5 and H1] A bipolar electrode comprises a metal base layer of Zn, Mg or Al having an exposed surface, a first layer of isobutylene polymer or copolymer incorporating acetylene black and preferably graphite conductive material, and a second layer of ethylene/vinyl acetate copolymer incorporating the said conductive material. In a preferred embodiment the first layer may be a mixture of low and high molecular weight fractions of the polymer, i.e. below and above 20,000 respectively, which may be applied to the metal base in two coats. Alternatively a first coat comprising the low molecular weight fraction may be applied followed by a second coat of the high molecular weight fraction. In an embodiment, Fig. 2, zinc sheet 11a is bonded to an aluminium foil 11b with epoxy resin 11c which contains metallic particles. First layer 12' is divided into three polyisobutylene strata 12a-12c; 12a and 12c having a molecular weight of 15,000 and stratum 12b, 50,000, each incorporating acetylene black and graphite. The top layer 13' consists of ethylene/ vinyl acetate copolymer with an admixture of acetylene black and coarse graphite particles, the latter imparting an uneven exposed surface. The layers are applied successively to the metal sheet in solution while each layer is still tacky. The composite is then air-dried and then baked at 60 to 90C.
Patent GB-388254-A (GB)
Title: Improvements in or relating to electro-acoustic devices and diaphragms therefor
IPC: H04R7/12
Filed: 1932-04-28
Abstract: 388,254. Diaphragms ; loud-speakers. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.- (Assignees of Kalin, W.; 6052, Madison Street, Brooklyn, New York, U.S.A.) April 28, 1932, No. 12248. Convention date, Feb. 12. [Class 40 (iv).] A diaphragm for a loud-speaker or the like, having the form of a right frustum of a conoid, comprises a plurality of obliquely truncated conoidal or frusto-conoidal sections, each having a different degree of stiffness, the joined edges of the sections having the form of ellipses of which the planes are oblique with respect to the axis of the diaphragm. In the loud-speaker shown, the diaphragm is built up of a section 30 of paper and a section 31 of light metal such as that known under the registered Trade Mark " Duralumin," the sections being formed as described above, with their oblique edges (one of which is serrated) cemented together. The periphery of the section 30 is supported by a ring 65 of material such as felt. The part 31 has a cylindrical flange 32 which extends into the air gap between the polepieces 12, 15 of the magnet system, and carries a driving coil 33. The coil may consist of edge-wound insulated metallic ribbon, cemented to an insulating sleeve. The polepieces 12, 15 are accurately centred with respect to each other by dowel pins 13, 16. Fig. 7 shows certain details, separated for clearness of representation. A spider, which may be of " Duralumin," has a hub portion 35 secured to the polepieces 12 by a bolt 38 extending through a cap 39,. the spider having flexible arms 37 and an annular flange. secured to the section 31 of the diaphragm. Extensions 40, 44 of 'the driving coil 33 are secured to insulating strips on the arms of the spider, whence they pass between insulating. washers 48, 49, and through holes in the parts 48, 35, to terminal eyelets 52 on an insulating disc 53, which is clamped between the .cap 39, and the spider. Insulated leads 55 are connected to the eyelets 52, and pass as shown in Fig. 7 into the polepiece 12. The leads are taken through an oblique bore 56 in the polepiece 12, Fig. 1, and through a bore 57 in the pole 11, into a chamber 25<1> formed in the magnet body 10. This chamber, which is closed by a plate 25, contains two insulating blocks, one of which carries terminals 58 to which the ends of the leads 55 from the driving coil are connected. The other block (not shown) carries terminals for connection to the ends of the field magnet coil 18. The terminals on the blocks are connected in external circuits by conductors (not shown) passing through the plate 25. The mechanical motional resistance of the driving coil and the mechanical impedance of the vibrating system comprising the driving coil, diaphragms, spider, and supporting ring, may be made substantially equal at a frequency in the lower portion of the audio range, as described in Specification 389,839. Graphs are given to illustrate the improvement in frequency response effected by the invention.