baber/WOPTO huggingface dataset:
Patent GB-787929-A (GB)
Title: Parasitic oscillation suppressor
IPC: H03F1/13
Filed: 1955-10-11
Abstract: 787,929. Discharge tube generating and selective amplifying circuits. COLLINS RADIO CO. Oct. 11, 1955 [Feb. 7, 1955], No. 28946/55. Class 40 (6). In a circuit for suppressing parasitic oscillation, an inductor and a resistor are connected in parallel with a connection made to a point on the inductor. The anode of a transmitting amplifier V<SP>1</SP> is connected to the parallel circuit L<SP>1</SP>, R<SP>1</SP> with an output connection taken from a movable contact 14 through a tuned circuit comprising inductor L<SP>2</SP> and shunt capacitor C<SP>3</SP>. By adjustment of the tap 14, a balance is obtained between the stray capacitance C<SP>1</SP> and the tuning capacity C<SP>2</SP>, and the contact 14 may be moved as the tuning capacities are varied. In a modification, Fig. 2, a similar suppressor circuit is inserted in the input to the discharge tube. The input is applied to the join of inductor L5, L<SP>6</SP> in parallel with resistor R2 so that a balance is obtained between the tuning capacitor C5 and the grid to cathode capacity C<SP>6</SP>.
Patent GB-1031973-A (GB)
Title: Electron beam convergence apparatus
IPC: H04N9/28
Filed: 1964-07-14
Abstract: 1,031,973. Cathode-ray tube circuits. RADIO CORPORATION OF AMERICA. July 14, 1964 [Aug. 5, 1963], No. 29013/64. Heading H4T. Relates to dynamic convergence circuits for a multiple-beam colour image reproducing cathode-ray tube reproducer. Fig. 1 (not shown). According to the invention at least one dynamic convergence electromagnet is provided and a transistor couples a source of sawtooth waves to the winding of the electromagnet only during the latter half of the line periods. The arrangement described, Fig. 2 (not shown), comprises dynamic convergence electromagnets 31, 32, 33 associated with transistors 47, 59, 70 and line 42 and field 67 output stages, the line output transformer 36 having additional secondary windings 38, 39 and the field output transformer having additional secondary windings 52, 84. Considering firstly the circuit operation at line frequency, wiper 46 controls the peak amplitude of the substantially parabolic current wave in windings 34G, 34R; valve 42 conducts only during the second half of each line period, Fig. 3, there being developed in the collector circuit of transistor 47 a substantially parabolic wave produced by integration of the sawtooth wave. During the non-conducting periods of transistor 47, which occur in the first half of each line period, the energy stored in windings 34G, 34R is dissipated in circuits which include a waveshaping network 54 and substantially no current flows through the windings at the centre of each line period. Shaping of the parabolic wave is effected by potentiometer 57. The relative currents through the windings is effected by adjustment of inductor 49. A sawtooth wave component at line frequency is supplied to windings 34G, 34R by secondaries 38, 39, the relative proportions being adjustable by potentiometer 41. For the winding 34B, wiper 58 determines the peak-to-peak amplitude of the parabolic current wave at line frequency, and wave-shaping circuit 62 incorporates a diode 64 to prevent current flow therein during the periods when transistor 59 conducts. Fieldfrequency operation is isolated from linefrequency operation by chokes 82, 86, and the energization of transistor 70 is controlled by potentiometer 72; diode 76 augments the energization during the latter part of the field period.
Patent GB-410740-A (GB)
Title: Improvements in and relating to the regeneration of energy by the network from valve-controlled alternating current motors
IPC: B60L7/16
Filed: 1932-10-18
Abstract: 410,740. Motors. AKT.-GES. BROWN, BOVERI, ET CIE, Baden, Switzerland. Oct. 18, 1932, No. 29097. Convention date, Oct. 23, 1931. [Class 35.] Machines with vapour or the like rectifiers in place of commutators.-In an alternating- current motor of the type employing valves in place of a commutator, regeneration of energy is obtained by bringing the distributer which controls the supply of positive voltage impulses to the valve grids into the position corresponding to the opposite direction of rotation and at the same time, a phase lag of about 90‹ with respect to the network voltage is imparted to the grid control voltage. The stator winding of the motor comprises two polyphase systems 2<a>, 2<b> fed from a single-phase transformer 1 and the rotor carries a continuous current exciting winding 2<c>. 2d and 2e are the distributers consisting of stationary contact segments and brushes rotating at the same speed as the motor. The grids of a mercury vapour rectifier 3 are connected to the distributer segments and also through resistances 7 to the negative terminal of a battery 8 so that all grids are negative except the one receiving a positive impulse through the distributer. The distributer segment rings are rockable. The grid impulses are obtained from a transformer 9 connected to the network and in series with each distributer and the transformer secondary winding is connected a rotary switch 4<a>, 4<b> driven in synchronism with the network frequency. Each switch comprises a conducting and a non-conducting segment so that by adjusting the portion of the switch, a different portion of the network voltage wave of the duration of half a period can be applied to the distributers for the purpose of altering the ignition point. This adjustment may be effected by connecting the exciting winding of the synchronous driving motor 5 in star to a potentiometer resistance 6 supplied with continuous current through movable brushes, movement of which alters the position of the magnetic axis of the motor field. The phase lag applied to the grid control voltage may be obtained by means of condensers, a transformer or a bridge arrangement of resistance and inductance. The Specification explains with the aid of diagrams that the synchronous switch should be capable of displacement through an angle greater than 180‹ and the displacement of the control voltage need not be exactly 90‹. If an adjustment of the switch greater than 180‹ is not possible, a second brush may be supplied for regenerative operation displaced by 90‹ from the motoring brush.
Patent GB-1221565-A (GB)
Title: Binders comprising a copolymer of styrene and a hemi-ester of maleic acid
IPC: C08F222/14
Filed: 1968-06-19
Abstract: 1,221,565. Styrene/maleate copolymers. BADISCHE ANILIN- & SODA-FABRIK A.G. 19 June, 1968 [22 June, 1967], No. 29097/68. Heading C3P. [Also in Division B2] A binder for coating agents and printing inks comprises a copolymer of (a) styrene and/or an alkyl styrene having a C 1-4  alkyl group, (b) a hemiester of maleic acid with a C 1-10  aliphatic and/or cycloaliphatic alcohol and optionally (c) up to 10 mole per cent of at least one other copolymerizable ethylenically unsaturated monomer, which copolymer has a mol. wt. of 1000-8000 and a softening point according to Krõmer-Sarnow-Nagel (DIN 53180) of 140- 200‹ C. and has been prepared by polymerizing the monomers in aq. suspension. In examples (a) styrene and/or vinyl toluene and (b) the nbutyl hemiester of maleic acid are polymerized in an aq. mixture of polyvinyl alcohol, copper sulphate (as polymerization inhibitor) dibenzoyl peroxide and butenol (as regulator) to produce beads of the above copolymer, which may be dissolved in ethanol or nitrocellulose.
Patent GB-408968-A (GB)
Title: Improvements in or relating to playing-cards
IPC: A63F1/02
Filed: 1932-10-18
Abstract: 408,968. Playing-cards. GARDINER, W. H., 17, Shakespeare Road, Hanwell, London. Oct. 18, 1932, No. 29113. [Class 132 (ii).] In a pack of playing- cards comprising distinctively marked groups of cards, the individual cards of each group bearing consecutive numerals, an additional card or cards are provided which are manipulated by the player leading the first card of each trick for the purpose of indicating to the other players whether that particular trick is capable of being taken by a card in the same group bearing a higher or a lower numeral than the card led. A form of the game simulating stock exchange dealings is described, and the additional cards C, D are used to disclose the word "up" or " down " by covering C partly with D. Fig. 2 shows a single additional card E with indications covered by moving a pivoted or sliding member F.
Patent GB-734357-A (GB)
Title: Improvements in material supplying means
IPC: B65G65/48
Filed: 1952-11-19
Abstract: 734,357. Hopper discharge. BABCOCK & WILCOX, Ltd. (Deutsche Babcock & Wilcox Dampfkesselwerke Akt.-Ges.). Nov. 19, 1953 [Nov. 19, 1952], No. 29209/52. Class 78 (1). Coal slurry supplying means of the kind including a bunker 1 rotatable about an upright axis, a bottom member or table 7 below the bunker rotatable about the same axis and an adjustable plough 139, comprises two annular tracks 41 arranged to support the weight of the bunker, and 42 arranged to afford lateral support to the bunker. As shown, motor 16 drives table 7 through gear 19, and the slurry fed into the bunker 1 is peeled off by plough 139 to fall on to conveyer 169, a sweep being secured to the table so as to assist the discharge of the material. A water jacket is provided at 204 to prevent escape of fumes.
Patent GB-246957-A (GB)
Title: An improved life saving device, or obstruction remover for vehicles
IPC: B60R21/34
Filed: 1924-12-06
Abstract: 246,957. McLean, D. Dec. 6, 1924. Obstruction-removers. - An obstructionremover comprises upper and lower horizontal frame members f, e, placed in front of and longitudinally of the vehicle and connected together by pivoted parallel links l which are pivoted to the chassis at g. The transverse bar i of the upper frame member and the transverse bar k of the lower frame member may be connected by netting and the apparatus is arranged so that the bar j projects in front of the bar k and on meeting an obstruction recedes whilst the bar k advances to scoop up the obstacle. A connection may be made from the upper frame member to the control position of the vehicle so that the guard may be operated by the driver. A spring-controlled telescopic rod d, c, connects the lower member e to the brake pedal b so that the brakes may be applied by the movement of the guard, and a pin o on the rod d of the sliding joint is arranged to make contact with a part n on the rod c to ground the electric current to the sparking plugs.
Patent GB-645849-A (GB)
Title: Improvements in radio receiving apparatus
IPC: H03F3/48
Filed: 1947-11-03
Abstract: 645,849. Superheterodyne circuits. BALHAM, H. Nov. 3, 1947, No. 29296. [Class 40 (v)] In a reflex superheterodyne receiver the reflex valve is of a high impedance type and amplifies the radio and intermediate frequencies or a first and a second intermediate frequency, the frequency-changing being effected by a twoterminal rectifier. In the circuit shown the received signal is applied to the control grid of the heptode section of valve V1 and the output is applied through a coil 3, a tuned circuit 4 and a coil 5 to the first diode of a valve 2 in series with the voltage induced in a coil 6 from a local oscillator comprising the triode section of valve V1. The resulting 160 kc/s. I.F. in coil 7 is filtered in tuned circuits 8 and 9 and passed back to the input grid of valve V1. Amplified I.F. is taken from coils 10 and 11 in the output circuit of valve V1 and detected in the second diode of valve V2. The resulting output is passed through a resistance capacitance filter R2, R3, C2, C3 back to the input grid of valve V1. The amplified audio voltage developed across resistor Rl in the anode circuit is fed to the grid of the output valve V2. The Provisional Specification includes in addition, the circuit diagrams of a permeability tuned receiver (Fig. 1, Provisional, not shown) and a capacitor tuned receiver (Fig. 2, Provisional, not shown) in which both sides of the capacitors are above ground potential. A double superheterodyne receiver is also illustrated (Fig. 3, Provisional, not shown), the R.F., two I.F. and audio signals all being amplified in the common valve but with the frequency changing diodes included in the same envelope as the second local oscillator.
Patent GB-323285-A (GB)
Title: Improvements relating to prepayment electricity and other meters
IPC: G07F15/06
Filed: 1928-10-11
Abstract: 323,285. Chamberlain &. Hookham, Ltd., and James, S. Oct. 11, 1928. Money-boxes or receivers. - In prepayment electricity or other meters, a separate compartment or coin receptacle, having a slot for insertion of coins, is provided in combination with or in addition to the ordinary money box, such additional coin receptacle being adapted to receive at the consumer's convenience instalments towards fixed or basic charges. The usual money drawer slidable through the casing a is formed by a partition b into two compartments c, d. The coins passed through the prepayment mechanism fall through a shoot e to the compartment c. The receptacle d receives coins through a slot f to meet fixed charges, the slot being provided with a hinged protective flap g. The partition b is removable and can be lifted out by a finger-piece h. The additional receptacle is safeguarded by the same fastening means as those employed for securing the main receptacle.
Patent GB-326439-A (GB)
Title: Improvements in appliances for playing miniature billiards
IPC: A63D15/02
Filed: 1929-09-28
Abstract: 326,439. McLellan, J. Sept. 28, 1929. Table games: scoring and marking apparatus.- Miniature cues for use in a game resembling billiards are heavily loaded at their butt ends. The cues may or may not be telescopic. In the former case tubular parts 27 slide into a loaded hollow butt 28 and carry a metal rod 29 bearing a rubber or leather tip 30. When not in use the rod 29 may be removed and replaced in reverse position in order to protect the tip 30. The rod 29 may slide into the butt 28, thus rendering unnecessary the tubular members 27. The butt 28 carries a scale 31 upon which scores can be marked by the sliding movement of a ring 32. In a modification, Fig. 5, of this scoring device, a wire pointer moves in a groove 33 adjacent to a spiral scale. Specifications 326,254 and 326,459 are referred to.
Patent GB-355995-A (GB)
Title: Improvements in devices for holding or retaining at the back collars for personal wear
IPC: A41F19/00
Filed: 1930-10-01
Abstract: 355,995. Straps and ban d s for personal wear. VICARS, S. V., 24, Belgrave Road, and GEMMELL, D., 7, Sackville Gardens, both in Ilford, Essex. Oct. 1, 1930, No. 29435. [Class 141.] A device for holding collars in position at the back comprises a strap A, made wholly or in part of elastic material, provided at its upper end with a tab C for attaching to the collar stud, and at its lower end with one or more tabs D for attaching to buttons on the braces or on the trousers. Alternatively, the tabs D may carry clips for attachment to the braces or trousers.
Patent GB-1178018-A (GB)
Title: Improvements in or relating to Rotary Slipper-Type Pumps
IPC: F04C15/06
Filed: 1967-06-26
Abstract: 1,178,018. Rotary pumps. T.R.W. Inc. June 26, 1967 [Dec.23, 1966], No.29458/67. Heading F1F. A rotary pump of the slipper type comprises a casing having a first end section 11, Fig.2, a pump body section 15 having a pump bore 27, a second end section 13 and a cover 14 and an annular rotor 26 having a plurality of peripheral notches 31, Fig. 3, in each of which is mounted a slipper 36 free to rock angularly and move radially as it follows the contour of the bore 27 on rotation of the rotor. The bore 27 is double-lobed and each lobe forms with the rotor an intake arc of increasing volume, a dwell arc of constant volume and a compression arc of decreasing volume. Each notch 31 includes a radial flow passage 40 fitted with a non-return loose ball valve 43 and opens into an axially-extending bore 41 in the rotor through which extends an angularly adjustable valve pintle 48 having a first pair of peripheral channels 53 inter-connected by a bore 54 and a second pair of peripheral channels 56 inter-connected by a bore 57. The bore 54 is connected by an axial passage 58 and a radial passage 60 in the rotor to an arcuate recess in a bore 49 in the end section 13 which leads to a main discharge port whilst the bore 57 is connected by an axial passage 59 and a radial bore 61 in the rotor to an arcuate recess in the bore 49 which leads to an auxiliary discharge port. The pintle 48 is adjustable angularly either manually or automatically in response to flow conditions by a pressure-responsive actuator to proportion the pump delivery between the main and auxiliary pump discharge ports. The pressureresponsive actuator 90, Fig. 6, comprises a spring-loaded spool 91 having differential areas formed with axial recesses 92, 93 inter-connected by an orifice 94 and a recess 84 engaged by a pin 83 fixed on a plate 80 secured by screws 81 to the end of the pintle. The smaller end of the spool 91 is connected to the main discharge port. The auxiliary discharge port may be connected for providing cooling or lubricating flow to hydraulic circuits or returning excess flow to pump inlet or sump.
Patent GB-822707-A (GB)
Title: Improvements in or relating to circuit arrangements comprising a controllable gas-discharge tube, and gas-discharge tubes for use in such circuit arrangements
IPC: H01J3/02
Filed: 1955-10-17
Abstract: 822,707. Cold-cathode tubes. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 17, 1955 [Oct. 15, 1954], No. 29544/55. Class 39(1). [Also in Groups XXXV and XL(c)] A d.c. gaseous discharge between two non-activated main electrodes in a coldcathode tube is continuously controlled by means of an auxiliary electrode situated in the proximity of one of the said main electrodes. The electrode arrangement shown comprises a pointed cathode S spaced 10 mm. from an anode G in the form of a metal plate having parallel slots in which are arranged wires A forming the auxiliary electrode. The wires A are secured at their ends to two bars (not shown) and the anode G is carried by a base J of insulating material. A voltage which is positive with respect to that applied to the anode G is applied to the auxiliary electrode A and produces high field strengths between the electrodes A and the anode G. The tube filling is hydrogen at a pressure of 110 or 150 mm. of mercury. Characteristic curves are given and the tube is shown connected in an amplifier circuit (see Group XL(c)) and a voltage stabilizer circuit (see Group XXXV).
Patent GB-1108314-A (GB)
Title: Improvements relating to devices for dispensing electrical components
IPC: H05K13/04
Filed: 1965-07-13
Abstract: 1,108,314. Assembling electrical components on circuit boards. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 13 July, 1965 [16 July, 1964], No. 29661/65. Heading B3A. In apparatus for assembling a plurality of electrical components in a desired pattern, the components are dispensed from a set of conduits 2, the delivery ends of which are arranged in the desired pattern and the cross-sections of which are such that each component is correctly aligned. The components 18 are fed into the conduits 2 in a block 1 by adhesive tapes 18 which leave the conduits along a slot 3 and are wound on to drums 7. The components may be delivered into recesses 14 in a jig 13 which can be moved to a horizontal position 13a where a circuit board 19 is added, the connectors on the components being inserted into apertures in the circuit board, or the components, may be delivered directly to the circuit board. The conduit has the same cross-section as the component, which may be of rectangular crosssection or may have a reference member such as a lug which ensures that the conduit delivers the component in correct alignment.
Patent GB-996160-A (GB)
Title: Improved cartridge-actuated device for firing pins into masonry or the like
IPC: B25C1/16
Filed: 1962-08-02
Abstract: 996,160. Cartridge-actuated tools. E. HOLZ. Aug. 2, 1962 [Aug. 3, 1961; March 9, 1962], No. 29724/62. Heading B4C. A cartridge-actuated tool for firing pins into masonary or the like comprises a barrel 1, a barrel holder 3, and a cartridge chamber 6 defined by a conical bore in the barrel closed at its large end by the barrel holder when the latter is locked to the barrel during firing, the chamber accommodating a cartridge holder 13 made from a resilient material, the conical bore in the barrel having an angle P such that tan P is greater than the coefficients of friction of the materials from which the cartridge chamber and holder respectively are made, the holder being compressed against a shoulder 8 when the barrel is locked so that it fills the conical chamber completely. In operation, after a cartridge 15 has been fired, the barrel and barrel holder are unlocked, thereby permitting the cartridge holder 13 to return to its normal shape and thus facilitate its removal together with the spent cartridge. In a modification, the rear surface of the holder is provided with a tooth-like formation 16 so that when the holder is locked in the chamber, a pin 17 in the barrel holder engages with a tooth and thereby prevents relative rotation between the barrel and cartridge holder.
Patent GB-692258-A (GB)
Title: Improvements relating to the anti-shrink and anti-felt treatment of wool
Inventor: FELL ERIC TOM
IPC: D06M15/423
Filed: 1949-11-22
Abstract: The tendency of materials composed wholly or partly of wool to felt or shrink when washed is reduced by treating them with an aqueous solution of permonosulphuric acid or a salt or salts thereof, the solution having a pH which is not within the range 2 to 7 and, if the pH is below 2, containing not less than 10 per cent by weight of sulphuric acid.  To obtain a pH greater than 7 an alkaline material, e.g. caustic soda, is added to the solution. Treatment may be effected at temperatures up to 50 DEG  C.
Patent GB-1349666-A (GB)
Title: Sensitizing compositions for electroless plating and methods for the manufacture and use of same
IPC: C23C18/28
Filed: 1971-06-25
Abstract: 1349666 Sensitizing solutions for electroless plating KOLLMORGEN CORP 25 June 1971 [29 June 1970] 29874/71 Heading C7F A composition for sensitizing a substrate prior to electroless plating with e.g., Cu, Ni, Co, Pd, Au or Ag comprises (a) a metal complex consisting of a precious metal of the fifth and sixth periods of Groups VIII and IB, (b) a Group IV metal which is capable of two valence states and (c) an anion capable of forming a stable moietz with both valence states of the Group IV metal, the molar ratio of (a) : (b) : (c) being from 1:1:3 to 1:6:24, and these being an excess of component (b) to provide 3 to 100 moles of (b) per mole of component (a). The composition may be incorporated in a plastic substrate. The precious metal may be Pd, Pt, Au, Rh, Os, Ir and salts e.g. chlorides, bromides, fluorides, fluoborates, iodides, nitrates, sulphates, and acetates may be used. The Group IV metal may be stannous tin, Ge, Ti, and may also be in the form of the above salts. The composition may be diluted with an acid, e.g. hydrochloric, hydrofluoric, sulphuric, citric or acetic. The composition may contain a stabilizer e.g. open chain aliphatic mono-ols, diols or polyols and a fluorimated hydrocarbon wetting agent. The composition may be prepared by heating the mixture at 80C. to boiling point.