baber/WOPTO huggingface dataset:
Patent GB-830401-A (GB)
Title: Improvements in and relating to electrical multiplying apparatus
Inventor: HUNTER DESMOND
IPC: G06G7/16
Filed: 1955-07-14
Abstract: 830,401. Electrical multiplying apparatus. BRITISH THOMSON-HOUSTON CO. Ltd. Oct. 12, 1956 [July 14, 1955], No. 20446/55. Class 37. Electrical multiplying apparatus wherein a plurality of stages of a potential divider, forming part of a servo device for positioning an output member in accordance with an electrical input signal representing a multiplier, are ganged to corresponding stages of one or more potential dividers arranged to receive an input signal representing a multiplicand and to give an output representative of the product of the input signal. A fixed potential from the transformer secondary 13 is applied across the first potentiometer and ganged switches 10 and 11 related to the output member supply separate potentials to opposite ends of the second potentiometer. These signals are each dependent on the position of the output member but have a constant potential difference between them. The wiper 15 also connected to an output member receives a signal from the second potentiometer and this signal is mixed with the first input signal in coils 17 and 18. The result is passed to amplifier A and thence to a phasesensitive device PSR which causes the signal to be fed to the step by step solenoids FS1 and FS2 if the signal has one phase and to RS1 and RS2 if the signal has the opposite phase. Attenuators AT reduce the signals to FS1 and RS1 so that the latter remain unaffected by small value signals from A. When a signal is received at A the appropriate solenoid FS1 and RS1 drive the switches 10 and 11 until the optimum position is attained. In this position conditions are such that the signal from A is too small to operate FS1 or RS1 but it will operate either FS2 or RS2 which drive switch 15 until a finer adjustment is attained. Similar devices P1a and P2a are ganged to the first devices P1 and P2 respectively and as the supply at 14 is constant the output at 22a is the product of the inputs at 18 and 21a. Similarlv further devices P1b and P2b may be ganged to the same shafts to produce similar results. The Specification while describing an A.C. embodiment states that the invention may be A.C. or D.C. operated.
Patent GB-336240-A (GB)
Title: Improvements in and relating to signs, advertisements, name-plates and the like
IPC: G09F13/06
Filed: 1929-07-04
Abstract: 336,240. Edison Swan Electric Co., Ltd., and Lines, H. E. July 4, 1929. Signs; name and number plates. -A sign panel comprises opaque portions 10 and transparent or translucent portions 10<1>, the latter being closely backed by perforated metallic foil 13 and suitably tinted if desired. The panel may be of glass or other transparent material coated with pigment or otherwise to form the opaque parts 10, or of opaque material such as wood or metal, with the parts 10<1> cut out and the openings filled with similarly shaped pieces of transparent material. The sign may be illuminated from the rear, preferably by an inclined or curved reflector, the face of which may be of metallic foil and may be perforated, stippled or embossed to produce a changing effect in conjunction with the front perforated foil as an observer passes the sign; this effect may be enhanced by giving a definite oscillatory movement to the reflector by means of a solenoid, crank-shaft or cam.
Patent GB-630758-A (GB)
Title: Phenol-acetal reaction products
IPC: C08G8/28
Filed: 1947-07-30
Abstract: Thermosetting condensation products are prepared by reacting an Anacardiace  phenol, in presence of an acidic or potentially acidic polymerization catalyst therefor with an acetal of the general formula <FORM:0630758/IV (a)/1> where R is H or an aliphatic, aromatic or heterocyclic radical which may be substituted or unsubstituted, R1 and R2 are substituted or unsubstituted aliphatic radicals, and R3 is a divalent substituted or unsubstituted aliphatic radical.  The term Anacardiace  phenol is defined to include cashew nut shell liquid, marking nut shell liquid, Japanese lac, or distillation residues from any of these, anacordic acid, cardol, anacardol, urushiol, cardanol, or substances obtained by polymerization or hydrogenation of any of these.  Suitable polymerization catalysts are sulphuric acid, hydrochloric acid, boric acid and di-ethyl sulphate.  The products may be thinned with solvents, e.g. gasolene, toluol, or acetone, toluene-ethanol mixture or the reaction may be performed in a solvent, e.g. a mixture of butyl acetate and ethyl alcohol to yield a coating or impregnating material, e.g. for electrical insulation.  They may be mixed with resins, rubber, polymers of butadiene or chlorobutadine or copolymers of butadiene with acrylonitrile or styrene to produce millable compositions which may be cured in presence of sulphur. They may be used as binders, or after hardening and comminution as friction elements, in brake linings.  Acetals mentioned are polyvinyl formal, acetal or butyral; 4-methyl dioxolane; formaldehyde trimethylene acetal; acetaldehyde trimethylene acetal; ethyl m-nitrobenzal; isopropyl benzal; ethyl cinamal; isopropyl isobutyral; and methyl furfural.  In addition the specific examples include the use of dimethyl acetal, isopropyl formal, di-2-chlorethyl formal, the acetal of ethylene glycol monomethyl ether, the formal of diethylene glycol monomethyl ether, and diethyl acetal.  In one example a mixture of polyvinyl butyral and the formal of diethylene glycol monomethyl ether was employed.  In another, the polymerized cashew nut shell oil and diethyl acetal were mixed with styrene and the mixture heated. In some of the examples the products are blended with oils, e.g. chinawood oil or a mixture of chinawood or oiticica oils. Fillers, e.g. cork or sawdust may be included in the compositions of the invention.  In one example tricresyl phosphate is included as a plasticiser.  The catalyst for the reaction may be left over from a preliminary polymerization of the anacardic starting material. U.S.A. Specifications 2,067,919, 2,128,247, 2,284,369 and 2,292,611 are referred to. p
Patent GB-1222232-A (GB)
Title: Superconducting materials
Inventor: CORENZWIT ERNEST
IPC: G11C11/44
Filed: 1968-05-01
Abstract: 1222232 Super-conductors WESTERN ELECTRIC CO Ltd 1 May 1968 [2 May 1967] 20591/68 Headings H1A A5 and A4D  A super-conductor material comprising Nb 3 Al, Nb 3 Ge or a solid co-solution of these materials is annealed at a temperature in the range of from 650 to 1000C. The annealing step increases the transition temperature to at least 18K and in some cases to 20K. The higher the annealing temperature the shorter the time required, a preferred schedule being cooling from 800 to 700C over a period of 63 hours. Various compositions, annealing schedules and methods of producing the initial material are described. A super-conducting coil comprising a plurality of turns of annealed wire, Fig. 1 (not shown), is described. The turns may be insulated by thin coatings of Au, Ag or Cu applied to the surface of a tube containing the powdered components of the compound which is then drawn down, heated to react the components, and annealed. The coil may be wound after annealing. A crossed film cryotron, Fig. 2 (not shown), is also described. The use of liquid hydrogen, at a pressure of 690 mm of Hg, as a coolant is mentioned.
Patent GB-443683-A (GB)
Title: Pins for securing sheets prior to rivetting
IPC: B25B31/00
Filed: 1935-07-22
Abstract: 443,683. Riveting; clamps. ROCROY, F. R., 3<TER>, Rue Montesquieu, Asnieres, Seine, France. July 22. 1935, No. 20778. [Class 83 (iv)] [See also Group XXIII] A member for securing together plates to be riveted comprises a split head 6 which is passed through the hole 8 in the plates, and is expanded by a slidable member 11 on a sleeve 13, the upper face 15 of the member 13 bearing against the plate 9, and being held by a nut 14 screwed on a shaft 1 of which the split members 4, 5 form an extension.
Patent GB-782019-A (GB)
Title: A mechanism for use as a timing device in the metering of telephone calls
Inventor: LESLIE JOHN DOUGLAS
IPC: H04M15/10
Filed: 1954-07-16
Abstract: 782,019. Electromagnetic switches. SIEMENS BROS. & CO., Ltd. Oct. 14, 1955 [July 16, 1954], No. 20816/54. Class 38 (5). [Also in Group XXXIX] A timing device used for metering calls in an automatic telephone system comprises a pawl- and-ratchet driven mechanism stepped at a constant rate by a source of timed pulses to drive a number of cams controlling sets of spring contacts. An arrangement of two cams rotating side by side at different speeds with a common follower is described together with an arrangement whereby a contact operating armature of an energized electromagnet is held away from the poles of the magnet by the movable spring contacts to which it is attached and can be moved to adhere to the poles of the magnet by means of a cam. As illustrated, the device is mounted on a frame with flanges 2 mounting shafts 4 and 5 and having a recessed back pillar 1 to which an E-shaped magnet 23 is secured with its limbs directed downwardly as shown in Fig. 3. A coil 27 surrounds the centre limb. Across the limbs of the magnet and in the recess of the pillar 1 a spring-loaded armature 28 is pivoted in the angle formed by attachments 29. A V-shaped arm 31 depending from the armature 28 carries a pawl 32 engaging a ratchet 6 on the shaft 4 and steps the ratchet in response to a pulse applied to coil 27 every second. Detent 33 holds the ratchet against reverse rotation. Cams 14 and 15 are fast with shaft 4 and control springs TD and FC. The remaining cams are arranged in pairs, each pair having a common follower 35. Cams 8 and 16 control springs PP ; 9 and 17 control N; and 10 and 18 control RC. Cams 8, 9 and 10 are fast with shaft 4, while cams 16, 17 and 18 are fixed to gear-wheels 11, 12 and 13, respectively, with which they rotate freely on shaft 4. Shaft 4 is stepped one revolution every 30 seconds and from gear-wheel 7 drives shaft 5 which, from wheels 20, 21 and 22 drives the cams 16, 17 and 18 at one-sixth the speed of their companions 8, 9 and 10. Spring sets PP, N and RC operate only when notches in the cam pairs coincide to admit a follower 35. A fast moving cam permits greater accuracy in cutting the cam profile and enables smaller cams to be used. The armature 44, controlling springs FC to which it is attached by studs 38, extends across poles 41 and 43 of a U-shaped electromagnet with a composite core 39, 391 of a coil 40, Fig. 2. Although the coil is energized, armature 44 is held away from the poles by the springs. Cam follower 35 is attached by a post 48 to a spring arm 47 having a stud 49 engaging the armature 44. When the cam follower enters a notch in cam 14, the spring 49 pushes the armature on to the poles 41, 43, to which it adheres until the magnet is deenergized.
Patent GB-1275721-A (GB)
Title: Signal flare and mine-anchor line cutter utilizing the same
Inventor: TEMPLE ROBERT
IPC: B63G7/04
Filed: 1961-06-08
Abstract: 1275721 Signal flares for mine anchor-line cutters MINE SAFETY APPLIANCES CO 8 June 1961 20840/61 Heading F3A A signal flare for an explosively operated mine anchor-line cutter is released from the cutter when this is fired and, being buoyant, rises to the surface where gases, generated by a chemical contained in the flare being exposed to water after separation of the flare from the cutter, produce a flame. In one embodiment described (Fig. 2), the flare comprises a cork ball 50 having a diametrical passage in which is mounted a metal tube 51 projecting at one end from the ball which thus floats with this end of the tube 51 pointing downwards. The chemical 52, calcium phosphide which may also contain calcium carbide, is contained in the tube 51 and is kept dry until it is to be used by being tightly sealed in a glass bottle 53. The ball 50 is housed between a spherical recess 55 in the frame of the cutter and a metal cup 57 soldered at 59 to the frame, this joint and the glass bottle 53 both being broken when the chisel of the cutter is driven against the frame to cut through a mine anchor-line. The chemical 52, which becomes wet and generates a gas, does not leave the tube 51 because it is held in a porous fabric bag 63. In another embodiment (Fig. 4), the flare is held in the cavity between a semi-cylindrical recess 67 in the cutter frame and a semi-cylindrical holder 69, the latter being soldered to the frame by a joint 68. The chemical 74 is contained in an open ended metal tube 75 enclosed by a fabric bag 76 and disposed in a glass bottle 73, a cylindrical float 77 occupying the space between the bottle 73 and the bag 76. The float 77 is produced by pouring a predetermined amount of polystyrene beads into the bottle 73 before the tube 75 and bag 76 are inserted, after which the bottle 73 is heated to cause the beads to swell. In a modification of this embodiment, the flare is held to the cutter frame by a metal band, the ends of which are secured by a coil spring which is severed by the chisel when the cutter is fired. In a further embodiment, a flare, similar to the one shown in Fig. 4, is held in an axial chamber inside the chisel by a closure disc soldered to the rear end of the chisel, this joints being broken by the shock of the explosion when the cutter is fired.
Patent GB-298314-A (GB)
Title: Improvements in and relating to devices for tying knots
IPC: B65H69/04
Filed: 1927-08-08
Abstract: 298,314. Croad, A. K., (Mill Devices Co., Inc.). Aug. 8, 1927. Knotting.-A device for tying weaver's knots, more especially in strands of tulle, rayon and the like material, by the method claimed in Claim 1 of Specification 203,368, is provided with means for ensuring the laying of the strands to be knotted in the correct position, to prevent the tying of other than a weaver's knot. The strand crossing mechanism is such as to prevent abrupt bends in, or undue compression of, the strands, and the secondary strand is cut between the knotting bill and the holders as close as possible to the knot at about the time the knot is formed and stripped to prevent slipping of strands of these materials from the tying ball. The invention is described as applied to a device having knot-tying, cutting and stripping mechanism substantially as described in Specifications 203,368 and 279,195. An arc-shaped arm 44 extending transversely across the knotter between the side frames acts, in conjunction with an upstanding arm 48, to separate the pairs of holders 11, 13 and 12, 14 respectively, in which the strands 15, 16 to be knotted are laid, and thus prevents incorrect laying of the strands. The arm 44 is held in this normal position by a spring 47, so as to be movable aside on its axis 46 out of the way by the stripper 39, in whose path it lies, to permit the knot to be stripped. Notcher rockers 24, 25, connected with slides 30, 31 respectively, cross the strands 15. 16, and the inner face of the rocker 25 is padded with material 49, Fig. 7, such as soft leather, to prevent undue compression of the strand 15, and the clamping edge 51 of the slide 31 is curved, Fig. 7, to prevent abrupt bends in the strand 15. The strand 16 is cut between the holders 11, 12, at about the time the knot is formed, by a cutter comprising a fixed blade 53 on the stripper, a movable blade 52 pivoted thereto and a lost motion connection between the movable blade and the knotter frame, the cutter being operated by the movement of the stripper in stripping the knot. During the straining operation on the strands to tighten the knot the strands are held on one side of the knotting bill 9 by the holders 13, 14, and at the other side by the holder 12 and the clamping jaw of the bill. The cutter for the strand 15 operates between the bill and the holder 12 when the knot begins to strip from the bill.
Patent GB-532941-A (GB)
Title: Improvements in electric discharge lamps comprising luminescent materials
IPC: H01J61/42
Filed: 1939-07-19
Abstract: 532,941. Luminescent materials. GENERAL ELECTRIC CO., Ltd., HARRIS, N. L., and SHAYLOR, J. H. July 19, 1939, No. 20966. [Class 39 (i)] Luminescent material used in a low pressure mercury vapour discharge lamp consists of three components (i) cadmium borate (ii) magnesium, zinc, cadmium or similar light giving tungstate and (iii) zinc beryllium silicate activated by 2-3 per cent of manganese or the material described and claimed in Specification 495,706 or this material modified as set forth in Specifications 509,857,522,607 and 530,510; these components are used to give an approximation to daylight or as a substitute for incandescent lighting the proportions being according to a diagram accompanying the Provisional Specification. The Specification describes the process of manufacturespecifying proportions and temperatures-of the following :-(i) zinc beryllium silicate from silica, zinc oxide and beryllium silicate, with manganous chloride for the activator ; (ii) magnesium tungstate from tungstic acid, ammonia solution, and hydrochloric acid to produce tungstic acid to which magnesium oxide is added ; and (iii) cadmium borate from cadmium nitrate, ammonium tetraborate, manganese dioxide and lithium chloride. Specification 535,897 also is referred to. Reference has been directed by the Comptroller to Specification 521,796 (as open to inspection under Sect. 91).
Patent GB-983168-A (GB)
Title: Improved butterfly valve construction
IPC: F16K1/226
Filed: 1962-05-31
Abstract: 983,168. Valves. FISHER GOVERNOR CO. May 31, 1962 [June 12, 1961], No. 20990/62. Heading F2V. A butterfly valve comprises a valve body 12 with a flexible liner 22, a disc valve 32 supported by a shaft 36 received in diametrically opposed openings, and seals bonded to apertures in the liner which are aligned with openings in the body for passing the shaft through the liner without the danger of leakage occurring between the shaft and liner. Each seal contains an 0-ring 44 and is provided at one end of a bushing 34 which may be of p.t.f.e. A further 0-ring 38 and a cover-plate 50 surround the projecting end of the shaft 36 which is secured to the valve 32 by tapered pins 48. The liner 22 may be made from chemically inert rubber such as that known as neoprene or " Hycar (Trade Mark).
Patent GB-1458868-A (GB)
Title: Communications system
IPC: H04L5/26
Filed: 1974-05-13
Abstract: 1458868 Delta modulation W F NANCE and R L SHACKLETT 13 May 1974 [14 May 1973] 21072/74 Headings H3H and H4M In a time-frequency division multiplex communication system, each input waveform is coded by a delta modulator into an information bit denoting change in excess of a predetermined minimum between successive samples and a polarity bit denoting the direction of change, information pulses from groups of delta modulators are combined to form binary words, and each possible value of each word is allotted a hole or unique combination of holes in the timefrequency division matrix. The polarity bits are sent less frequently than the information bits. Delta modulation.-Each input channel is connected via a 5 kHz cut-off low pass filter (not shown) to a delta modulator, Fig. 3, comprising a comparator differential amplifier 52, differentiator 53 clocked at the channel sample rate of 50 kHz, and feedback integrator 58, producing bipolar pulses at the output of amplifier 54, from which are derived a change bit at 69 indicating a change in excess of the threshold of trigger 61 between samples and a polarity bit at 71 indicating the direction of the change. A corresponding decoder is described with reference to Fig. 10 (not shown). Multiplexing.-The change bits from groups of e.g. 2, 3 or 4 delta modulators are combined to form binary "words" and the polarity bits for each group are also combined to form "words". Each "word" is decoded to mark one line, the line marked representing the combined states of all the change bits (or polarity bits) of the respective group. The duration of the mark is stretched relative to the duration of individual samples to allow allocation of an appropriate hole, or combination of, e.g. 2 or 3 holes, in the time-frequency matrix. The polarity signals are sent at <SP>1</SP>/ 5 th the rate of sending of change signals. If a frequency required to be transmitted is already present on the transmission medium, its local generation is suppressed to avoid accidental cancellation in the event of phase opposition.
Patent GB-1182934-A (GB)
Title: An Improved Photographic Exposure Meter.
IPC: G03B7/099
Filed: 1967-05-05
Abstract: 1,182,934. Photographic cameras. NIPPON KOGAKU K.K. May 5, 1967 [May 7, 1966 (4)], No.21131/67. Heading G2A. A single lens reflex camera having a focusing screen arranged in the view-finder light-path includes an exposure meter, receiving light from the focusing screen via a lens system, wherein the light path of the exposure meter is inclined to the axis of the view-finder light path, and the exposure meter is such that the brightness of either the whole or a part of the screen may be measured. In one modification, Figs. 1-3 (not shown), two separate photo-cells and lens systems are connected to the exposure meter, the area of the lightreceiving area of one being restricted to a part of the focusing screen, there being a switch to include either one or the other into the meter circuit. In the modification shown in Fig. 4, a zoom lens system 2, 23, 24 is used to focus an image of the screen S on to a photo-cell 3, such that when the lens 23 is in one end position the whole of the screen, and in the other end position a part of the screen, is focused on the cell. Movement of the lens 23 by a lever 27 also acts on a rack and pinion 51, 47 which acts on a variable resistor 41 in the meter circuit to compensate for difference in screen areas measured. In a third modification, a variable aperture is placed in front of the cell, the adjustment of which may also act on a variable resistor as above.
Patent GB-1243411-A (GB)
Title: Method and apparatus for continuous solution concentration measurements
Inventor: LUDVIK BORIVOJ
IPC: G01N7/14
Filed: 1969-04-25
Abstract: 1,243,411. Determining the concentration of a solution. VYZKUMNY USTAV ZUSLECHTOVACI. 25 April, 1969, No. 21173/69. Heading B1X. [Also in Division G1] A method of continuously measuring the concentration of a first substance in a solution comprises feeding it together with a quantitative excess of a solution of another substance that will react to form an insoluble gas with the first substance from below to an upright tube open at the top, the volume of the gas formed being proportional to the concentration of the first substance, and measuring a physical property of the resulting gas/liquid mixture. A wetting agent may be present in one of the solutions. The physical property may be the average specific gravity or the electrical resistance of the mixture. Solutions which may be thus reacted together are a hypochlorite solution and hydrogen peroxide to determine quantitatively either of the components, or acidified potassium permanganate and hydrogen peroxide for quantitative determination of the latter. In Fig. 1, in which the density of the gas/liquid mixture is measured, the two solutions are introduced from 1 and 2 into the base of tube 3 up which they flow and leave via 9. The density is measured by micromanometer 5 pivoted at its zero point 7. If the density of the liquid/gas mixture in tube 3 in such that liquid reaches adjustable electrical contact 10, this completes a circuit with contact 11 to reduce the flow of the solution of the other substance. If the liquid in micromanometer 5 falls and the circuit is broken, the flow of the solution of the other substance is increased. In Fig. 2, in which the electrical resistance of the gas/liquid mixture in tube 3 is measured, the two solutions flow up conductivity cells 12 and 13 and mix in tube 3. Electrodes 14-19 are connected to a bridge comprising potentiometer 20.