baber/WOPTO huggingface dataset:
Patent GB-592729-A (GB)
Title: Improvements relating to signal control apparatus for use in electrical movement-control systems
IPC: G05D3/14
Filed: 1945-05-28
Abstract: 592,729. Correspondence control systems. SPERRY GYROSCOPE CO., Inc. May 28, 1945, No. 13378. Convention date, May 27, 1944. [Class 40 (i)] In a correspondence control.system of the type in which fine and coarse adjustment movements are transmitted, the two signals are amplified at the receiver by separate amplifiers and combined to actuate a follow-up servomotor, the coarse signal amplifier being biassed beyond cut-off so that for small deviations, only the "fine" signals are applied to the motor. Fig. 1 shows an arrangement in which controlling shaft 1 drives the rotor of "coarse" selsyn transmitter 3 directly, and the motor of " fine " transmitter 4 through step up gears 5. The rotors of the respective receivers 10 and 11 are similarly geared together. Signals from the motor 13 of receiver 10 are applied to valve 15, which is biassed so that it only conducts when they exceed a predetermined value. Signals from rotor 14 of receiver 11 are amplified by valve 16 which is provided with negative current feedback. The voltages appearing at the anodes of the valves are plotted with respect to angular displacement between rotors 2 and 13 in Fig. 2, while Fig. 3 shows the voltage applied to the primary of transformer 25, which is connected between the anodes of the valves. Transformer 25 feeds phase sensitive amplifier 28 which provides an output dependent in phase or polarity on the phase of the input voltage, so that the associated motor 33 drives the follow-up shaft and the rotors of selsyns 10 and 11 into correspondence with the transmitter. The ratio of the gears coupling the two selsyn systems is such that when the displacement is in the order of 180 degrees the fine signal is in the sense to correct the displacement. Also the coarse signal amplifier output is always greater than that of the fine for any given deviation. The two valves may be replaced by a twin tube and may be any multi-electrode type.
Patent GB-1253876-A (GB)
Title: Scraper conveyor
Inventor: MOULD GEOFFREY RUSSEL
IPC: B65G19/22
Filed: 1969-03-14
Abstract: 1,253,876. Endless conveyers. COAL INDUSTRY (PATENTS) Ltd. 13 March, 1970 [14 March, 1969], No. 13474/69. Heading B8A. [Also in Division E1] In a scraper conveyer each scraper flight 12 has a platform 10 secured thereto to form a substantially contiguous surface with adjacent platforms upon which coal-face debris may be conveyed from a roadway to be discharged by a plough into the goaf to form a pack. Each platform 10 has a convex upper surface, the apex of which lies in a plane coincident with the upper surface 18 of a flange of the side wall 17 of the line pans or with the upper surface 22 of a plate 20 secured to the flange. The platforms may be separately secured to the flights or may be formed integral therewith, Fig. 3 (not shown). Each scraper flight is secured between two chains (not shown) by clamps 24 which have a tail portion 26 pivotally secured at 28 to the scraper flight, alternatively, Fig. 5 (not shown), the flight may be secured rigidly with the chains.
Patent GB-1076054-A (GB)
Title: Production of colour photographic materials
Inventor: GREENHALGH COLIN WILLIAM
IPC: G03C7/388
Filed: 1965-03-30
Abstract: 1,076,054. Incorporating couplers in emulsions. ILFORD Ltd. March 24, 1966 [March 30, 1965], No. 13477/65. Heading G2C. Aqueous alkali soluble-colour couplers are incorporated in gelatino silver halide emulsions by adding a predetermined quantity of a waterinsoluble organic liquid boiling above 150‹C. to an alkaline solution of a colour coupler, said alkaline solution comprising water and a sufficient quantity of a solvent miscible therewith to dissolve the water-insoluble organic liquid, and adding the product either directly to a gelatino silver halide emulsion or to an aqueous gelatine solution which is then added to a gelatino silver halide emulsion. Specified water-insoluble organic liquids are octadecanol, petroleum fractions, dibutyl phthalate, veratrole, tri(chloropropyl) phosphate diphenyl, diphenyl ether, N, N-dibutyl lauramide, 2:4-di-n-amyl phenol, tricresyl phosphate, benzophenone, ethyl oleate, lard, cream of milk, glyceryl monobenzoate, olive oil, octadecene, 2.4 -di-t-amyl phenol, triphenylphosphate, pentaerythritol modified polydiethylene adipate and silicone polyether block copolymers. Specified aqueous alkali-miscible solvents are acetone, methanol, n-propanol, isopropanol, dimethylformamide, ethyleneglycol, dioxan and #-ethoxyethanol.
Patent GB-1487384-A (GB)
Title: Electric kettles
IPC: A47J27/21
Filed: 1975-05-23
Abstract: 1487384 Electric kettles BULPITT & SONS Ltd 23 May 1975 [27 March 1974] 13498/74 Heading A4A An electric kettle of the kind in which water vapour expelled from a steam vent when the water boils impinges on a thermally sensitive element 13 which interrupts the power supply, has the steam vent disposed adjacent the filling opening and has the side of the steam vent opening to the interior of the kettle covered by a baffle 17 defining a chamber 22 having an aperture 23 directed toward the filling opening whereby when the kettle lid 3 is in position the peripheral flange 24 of the lid lies across and spaced from the aperture 23, preventing splashes of water from obstructing the steam vent. The steam vent is square and the baffle is of inverted channel shape, open at one end to define the aperture 23 and closed at the other end. In an alternative embodiment the kettle handle may be secured to the body by means of screw ended rods which pass through the body and the baffle, the rods and baffle being secured by nuts.
Patent GB-905365-A (GB)
Title: Improvements in and relating to the removal of hydrogen sulphide and sulphur dioxidefrom waste gases
Inventor: ROBERTSON WILLIAM SWAN
IPC: B01D53/52
Filed: 1960-04-19
Abstract: H2S and SO2 are removed from the exit gases from a Claus kiln, by oxidizing a proportion of feed gas, drawn from the main stream passing to the Claus kiln, to convert the H2S to SO2, and feeding the oxidized gas into the main exit stream adjacent to the inlet of a gas washing tower in order to adjust the molar ratio of SO2 : H2S to 3 : 1.  The washer removes all the H2S by means of an aqueous solution of NH3 in the washer, H2S and SO2 and water react together so that the gases are absorbed in the form of thiosulphate.
Patent GB-135665-A (GB)
IPC: B66C1/06
Abstract: 135,665. Blunt, W. E. Deo. 16, 1918. Grab-forks.-The grab-fork has a frame built up of transverse plates 1 with bent-over ends connected by side plates 3 supported from a top plate 4 by struts 5. The top plate carries a hook or eyelet 7 for attachment to a crane, derrick, &c. The fork-arms 13 are mounted on the end plates 3 by pivots 12, each lateral pair of forkarms being connected by a load-engaging angleiron 14, and the opposed pairs being connected by safety chains 27 attached to hooks 28. The slotted inner ends of the fork-arms engage the ends of a plate 19 slidable in slots in plates 10 depending from the top plate 4. The plate 19 is centrally pivoted to the armature bar 20 of an electro-magnet arranged in a casing 22 secured to the plates 10. The fork-arms are so weighted that they are normally in the closed position shown in Fig. 4. By exciting the electro-magnet, the arms are opened to the load-engaging position and are retained in that position after the current has been cut-off, by means of a rotatable locking-rod 24<a>, which can be operated bv a handle 26 to displace the cut away part 25, Fig. 5, so that the rod engages a recess in the armature rod 26 and locks the fork-arms in the open position. The electro-magnet may be arranged to close the fork arms instead of opening them.
Patent GB-1374517-A (GB)
Title: Vibrating devices
IPC: B07B1/42
Filed: 1972-03-23
Abstract: 1374517 Vibrators SIMONACCO Ltd 18 Jan 1973 [23 March 1972] 13566/72 Heading F2X  A vibrator comprises a housing 12 in which a pair of shafts 15, having fixed out-of-balance masses, are mounted in bearings 16 and carry, adjacent one end of each, driving pinions 17 in engagement with each other. A pulley 19 on one of the shafts 15 is driven via a belt from a motor (not shown). A removable carrier plate 22 is keyed to the end of each shaft 15, a number of weights 23 forming an adjustable out-of-balance mass being removably bolted to each plate 22. Each plate 22 is capable of being mounted on its associated shaft 15 in either of two diametrically opposed positions, one of which is 180 degrees displaced from the position of the fixed out-of-balance mass. Inspection covers 13, 14 at the ends of the housing 12 provide easy access to the weights 23. The housing 12 is of a sealed construction and in use is at least partially filled with a lubricant, filler and drain plugs (24, 25) (Fig. 1, not shown) being provided for this purpose. In use, the shafts 15 rotate in opposite directions, and the fixed out-of-balance masses are 180 degrees out of phase with each other. To reduce the out-of-balance condition the weights 23 can be individually removed until the out-of-balance mass is comprised solely of the fixed portion on the shaft, and the carrier plates 22. A further reduction can then be achieved by removing the carrier plates 22 or by rotating them through 180 degrees so that they are located opposite the fixed portion. With the carrier plates 22 thus disposed and by reapplying one or more of the weights 23, the out-of-balance condition can be reduced to a minimum which, if the total mass of the plates 22 and the weights 23 is equal to that of the fixed portion, can equate to zero.
Patent GB-709214-A (GB)
Title: Improvements in or relating to electrical oscillation generators
IPC: H04L7/033
Filed: 1951-06-08
Abstract: 709,214. Pulse shaping and valve generating circuits. GENERAL ELECTRIC CO., Ltd., and IMM, R. C. June 9, 1952 [June 8, 1951], No. 13713/51. Class 40 (6) in an oscillator locked in phase by a synchronizing pulse train, unidirectional pulses are derived from an oscillator valve and added to phasing pulses derived from the leading and/or trailing edges of the input synchronizing pulse train and then fed to the oscillator valve, the sign of the phasing pulses being opposite from that of the unidirectional pulses. A circuit 16, Fig. 1, resonant at the pulse recurrence frequency is included in the anode circuit of oscillator valve 15 and feeds a valve 25 operating under Class C conditions. A connection from the join of resistors 26, 32 is made over resistor 27 and coupling capacitor 28 to a crystal 13 in a thermostatically controlled oven 14. The positive-going pulses from valve 25 maintain the crystal in series resonance and thus provide the drive for valve 15. A pulse modulated train, fed in at 1 to a valve amplifier 2 is sliced by diodes 4 and valves 5 in the manner described in Specification 706,715, a phase splitter valve 7 giving the outputs, Figs. 2(a) and (c) at the cathode (A) and anode (C). Differentiating circuits 36, 37 and 33, 34 produce the waveforms, Figs 2(b), 2(d), and rectifiers 39, 38 suppress the positive-going pulses. The pulses are added to the positivegoing pulses from valve 25 at the point E to give the waveform, Fig. 2(e). The phase of the locally produced pulses shifts until the phasing pulses occur equidistant from two successive local pulses. A sine wave output is made available over the tuned circuit 69. A rectifier 44 prevents interaction between the oscillator and phasing pulse circuits. Reshaped output pulse train. -The signal occurring at the cathode (A) of valve 7 is fed to a gating circuit comprising biased diodes 61 which are caused to conduct by the locally generated pulses fed over transformer 47 at the centre of each possible pulse period. The storage capacitor 64 is thus charged or discharged at the occurrence of each pulse either to the level of a pulse or the zero datum level. The resulting pulse train, Fig. 2(f), is fed out over cathode follower 68.
Patent GB-928947-A (GB)
Title: Flight condition sensing
IPC: G01P5/175
Filed: 1961-04-17
Abstract: 928,947. Measuring electrically. BENDIX CORPORATION. April 17, 1961 [April, 21 1960], No. 13834/61. Addition to 928,946. Class 40 (1). Apparatus for computing a corrected value of an aerodynamic factor based on an erroneous static pressure measurement, as described in the parent Specification, is provided with means for producing an electrical signal representing the corrected value of the factor. In an altitude and rate of climb meter (Fig. II) static pressure capsule 10 acts on core 16 of a differential transformer to give an approximate measure of altitude based on the erroneous pressure measurement. The input winding of the transformer is excited from A.C. source 22 and output winding 19 feeds an amplifier 28. The third winding 18 is connected in series with windings 50, 51 of a second variable transformer 49, in parallel with winding 19. The core of transformer 49 is rotated as a function of Mach number by linkage 61, 62 from differential pressure capsule 60 and cam 64, rotated as a function of corrected static pressure from motor M. The primary winding of transformer 49 is supplied with A.C. through a rheostat 55 controlled as a function of pressure (and hence altitude) by motor M. The output of windings 50, 51 is then a measure of the altitude error, which is a known function of Mach number and altitude (Fig. I, not shown). The resultant output from windings 18, 50, 51 and 19 is amplified and applied to a two-phase motor M which drives an altimeter needle 41 and counter 42, and also moves the windings 17, 18, 19 of the differential transformer relative to the core in a follow-up action tending to reduce the output signal. A manual adjusting knob 45 is provided for barometric pressure correction. Motor M also drives a tachometer generator G to give a measure of rate of change of altitude, and also a stabilizing rate feedback signal to the amplifier. The airspeed meter (Fig. IV) differs in' that the core of the differential transformer 111 is driven by a differential pressure capsule to give an approximate measure of airspeed. Rheostat 140 is controlled as a function of airspeed through cam 156 and shafts 126, 113, and core 155 of transformer 150 is rotated as a function of Mach number as before. Motor 125 causes nut 115 to move along lead-screw 117 and moves the windings of transformer 111 through cam surface 114, the rotation of shaft 113 being a function of airspeed. A rate genertor 149 gives an output which is a measure of the linear acceleration, and this signal is applied as negative feedback to amplifier 134. A calibrating cam 165 (65 in Figure II) is provided to allow corrections to be applied for manufacturing differences in the manometric capsules. Temperature compensation is provided by a bi-metallic rod 102.
Patent GB-1001834-A (GB)
Title: Improvements in or relating to photopolymerisable compositions
IPC: C08F2/46
Filed: 1963-04-08
Abstract: A photopolymerizable composition comprises (a) an addition polymerizable, non-gaseous, ethylenically unsaturated compound containing at least one terminal ethylenic group (CH2=C<) having a boiling point above 100 DEG  C. at normal atmospheric pressure and being capable of forming a high polymer by free-radical initiated addition polymerization; (b) at least one sensitometric modifier containing an organic compound of the formula -N=C<, wherein the nitrogen atom is also linked to a single oxygen atom, said modifier being present in an amount from 0.001 to 3.0% by weight of constituent (a); (c) a free-radical generating addition polymerization photoinitiator activatable by actinic radiation, in an amount from 0.001 to 10 parts per 100 parts of the total photopolymerizable composition.  The compositions preferably also contain (a) a viscosity modifying agent, preferably a thermoplastic compound which is solid at least at 50 DEG  C., such agents include filler materials, both inorganic and polymeric, plasticizers and high boiling solvents, and (e) a thermal addition polymerization inhibitor.  Preferably the sensitometric modifier (b) contains a compound of formula <FORM:1001834/C3/1> wherein the nitrogen atom is linked to a single oxygen atom and (1) the monovalent bond of the nitrogen atom may be attached to a hydrocarbon radical (R); when the carbon atom is attached to a hydrogen atom (R1), its remaining bond is attached to an aromatic ring system (R11) and when the carbon atom is not attached to hydrogen, it is part of a carbocyclic ring system (R1 and R11) and (2) the nitrogen atom may not carry a substituent R (R=zero) and R1 and R11 are a benzenoid ring system containing an amino group.  Still more particularly the sensitometric modifier (6) may be represented by one of the following formula <FORM:1001834/C3/2> wherein R is hydrogen, alkyl, hydroxyalkyl, phenyl, R1 which may be the same or different to R, is alkyl, hydroxy alkyl, phenyl, acetamido, N1-alkyl, N1,N1-dialkyl substituted acetamido or p-sulphophenoxybutyl <FORM:1001834/C3/3> wherein the carbon atom is part of a carbocyclic ring system or is attached to hydrogen and an aromatic ring system, and the monovalent bond of the nitrogen atom is attached to a hydrogen or substituted hydrocarbon radical. Long lists of suitable monomers are supplied alkylene and polyalkylene glycol diacrylates being preferred.  Specifications 741,441, 741,470, 807,948, 905,700, 935,627, 945,807, 1,001,831, 1,001,832 and 1,001,833 are referred to.
Patent GB-657935-A (GB)
Title: Improvements in sorting cabinets
IPC: A47B63/02
Filed: 1949-05-24
Abstract: 657,935. Sorting mail and like documents. NAAMLOOZE VENNOOTSCHAP TECHNISCHE MAATSCHAPPIJ MARCHANDANDRIESSEN. May 24, 1949, No. 13891. Convention date, Nov. 6, 1948. [Class 117] A cabinet for use ir sorting mail or like documents comprises at least two adjacent banks of compartments one behind the other, with separate feeding- apertures to the compartments of each bank all opening on the same side of the cabinet. As shown, a sorting table 10 is fitted with two banks 11, 12 of compartments 13, 14 respectively with sloping floors, feeding-shoots 17 for the rear compartments 14 being provided between the front compartments 13. The backs of the latter are fitted with stopgates formed by vertical rods 21 or helical springs, the compartments 14 being fitted with similar gates 25 pivoted at 26 and normally held in the closure-position by springs 28. The Specification as open to inspection under Sect. 91 describes also a modification comprising cabinets of different heights, with or without a table, arranged at an angle to one another to assist the reach of the sorter. This subject-matter does not appear in the Specification as accepted.
Patent GB-1378726-A (GB)
Title: Phosphonate diesters useful as flame retardants
IPC: D06M13/322
Filed: 1973-03-22
Abstract: 1378726 Phosphonate diesters HOOKER CHEMICALS & PLASTIC CORP 22 March 1973 [30 March 1972] 13908/73 Heading C2P [Also in Divisions C3 and D1] Novel compounds of the general formula wherein R<SP>1</SP> is phenyl, C 2 -C 6  alkenyl, C 1 -C 6  alkyl or C 1 -C 6  haloalkyl and R is C 2 -C 8  alkenylene,. C 1 -C 8  alkylene or phenylene are obtained by reacting with a phosphite: (R<SP>1</SP>O) 3 P in a suitable solvent, e.g. a hydrocarbon or an excess of the phosphite ester. The products are useful as flame retardants for textile materials and synthetic resins.
Patent GB-1023127-A (GB)
Title: Improvements in or relating to protective bricks and assemblies incorporating same
Inventor: THOPRIEUX JACQUES
IPC: E04B2/12
Filed: 1964-04-03
Abstract: 1,023,127. Building blocks. COMMISSARIAT A L'ENERGIE ATOMIQUE. April 3, 1964 [April 5, 1963], No. 13944/64. Heading E1B. A transverse opening in a radiation-protective wall has zig-zag internal surfaces and has stocked therein an assembly or removable blocks, e.g. of high-cement concrete, each block comprising an oblique prism with a trapezoidal base. To facilitate handling each block may have a through passage 9, Fig. 1 (not shown) and/or a recessed handle 15, Fig. 4 (not shown).
Patent GB-367253-A (GB)
Title: Improvements in optical-projection apparatus
IPC: G09F19/18
Filed: 1931-05-12
Abstract: 367,253. Optical-projection apparatus. MANNHEIMER, M., 29, Soorstrasse, Charlottenburg, Berlin. May 12, 1931, No. 14058. [Class 97 (i).] Apparatus for projecting images on to hillsides, clouds, &c., comprises a parabolic, Mangin, or other reflector for projecting a parallel beam, and at the focus thereof a source of light shaped in accordance with the sign to be projected ; alternatively an image of a stencil, so shaped, may be produced at the focus of the reflector, a real image of a source of light being produced on the stencil. As shown in Fig. 1, a parabolic mirror c, having an aperture of about 70‹, projects from an electric lamp filament d which is adjustable into the focus by an arm e, a screw spindle, and a handle f<1>. The filament may be replaced by the positive column of a gas discharge lamp. Fig. 2 shows a stencil j on which a real image of an arc crater h is produced by means of a spherical mirror i, the magnification being less than four. The stencil is so placed in relation to a plane reflector p and the projecting mirror c that its reflected image is at the focus of the mirror c, and the distance of the stencil from the mirror i is less than double the focal length of the mirror c. The stencil is enclosed in a box k having windows l, m of heat resisting material and pipes n, o for circulation of water. The mirror i may be divided, the parts being adjustable to vary the shape of the light spot on the stencil.
Patent GB-791546-A (GB)
Title: Improvements in or relating to electric rectangular-wave generator circuits, relaxation oscillator circuits, and trigger circuits
Inventor: WOLFENDALE ERIC
IPC: H03K3/281
Filed: 1955-05-16
Abstract: 791,546. Transistor pulse generating, single and two-stable state circuits. MULLARD RADIO VALVE CO., Ltd. Nov. 25, 1955 [May 16, 1955], No. 14065/55. Class 40 (6). In a circuit employing a first transistor T1 having an alpha less than 1 with conductive impedances Rc, Re in the collector and emitter lead, a regenerative loop is formed by a second transistor T2 of similar type with direct connections between the collector of T1 and base of T2 and between their emitters. When transistor T1 is conducting heavily in its bottomed condition, the emitter and collector potentials are both slightly positive with respect to earth. Due to the low potential difference between emitter and base of transistor T2 it is nearly cut-off. The state of conductivity in the transistors T1, T2 may be reversed by applying a negative triggering pulse in the loop or a positive pulse to the base of transistor T1. With transistor T2 conducting, the emitter takes up a more negative potential than that of transistor T1 since there is no collector load and as a result transistor T1 is cut-off. The circuit may be restored by a positive going pulse in the loop or a negative pulse applied over resistor Rb to the base of transistor T1. The circuit may be rendered monostable or astable by connecting the base of transistor T1 through a capacitor to a constant potential and through a resistor to a further point at a potential more negative than that which exists when transistor T1 is cut-off. Adiustment of the resistor and the potential. to which it is connected causes the circuit to be monostable or astable. Specifications 767,727, 791,544 and 791,545 are referred to.