baber/WOPTO huggingface dataset:
Patent GB-1128750-A (GB)
Title: Slip spline assembly
IPC: F16D3/06
Filed: 1967-05-04
Abstract: 1,128,750. Shaft couplings. DANA CORP. 4 May, 1967 [31 May, 1966], No. 20869/67. Heading F2U. To facilitate axial sliding of the parts of a spline coupling, an externally splined shaft is coated with a thin film of synthetic anti-friction plastics material such as nylon, the edges of the splines being chamfered at 38 to permit flow of the plastics material under cold working thereof. An internally splined sleeve is uncoated and of a softer steel than that of the shaft, and its splines do not extend to the curved base 22 between the shaft splines so that the plastics  material can flow into the spaces so formed. At the forward end the edges of the shaft splines are chamfered at 30, 32 to facilitate assembly of the coupling and ensure a smooth and uniform surface for the plastics coating. The top edge at the rearward end of the shaft splines is also chamfered.
Patent GB-905741-A (GB)
Title: Improvements in ventilating cushion
IPC: A47C7/42
Filed: 1960-06-14
Abstract: 905,741. Spring upholstery. ALPHA RESEARCH CORPORATION. June 14, 1960 [June 30, 1959], No. 20879/60. Class 52 (4). In a spring cushion 20 having an inner coiled wire unit 21 between open mesh covers 22 secured at their edges by stitching the unit 21 has intersecting sets 24, 25 of parallel rows of coiled wire secured to a border frame 23, the coils being forced into each other at the intersection of the rows and the coils being flattened to an elliptical shape and indents 27 being made in the inner intersecting coil by a press 28 or by conveyer belts or rollers spaced apart diminishing distances. The sets of coils 24, 25 are formed by winding a long coiled wire around frame 23 which after a border coil is strung on is clamped between upper rotatable holder 52 and similar lower holder 53. Notches 57 on bracket 55 determine spacing of the rows by locating feed tube 61 which is raised at each half turn of the frame, a thin ribbon spring 64 striking the bracket 55 to give a signal to the operator. When one set of rows has been wound on the frame is rotated through 90 degrees and the process repeated.
Patent GB-1513371-A (GB)
Title: Sensor or detector element for an electrical hygrometer
IPC: G01N27/22
Filed: 1975-08-07
Abstract: 1513371 Humidity detectors P ROCKLIFF 7 Aug 1975 [11 May 1974] 20944/74 Heading G1N A sensor or detector element of the capacitance type for use in an electrical hygrometer comprises a substrate or base, e.g. of glass or ceramic material on which is formed three layers, a first and third layer constituting metal electrodes, e.g. of gold and interposed therebetween a two film layer, one film of the layer being non-hygroscopic e.g. of silicon monoxide and protecting the first layer from the second film which is of hygroscopic material e.g. calcium fluoride. The third layer is capable of permitting free passage of water molecules.
Patent GB-853951-A (GB)
Title: Improvements in electric switches
Inventor: ROESER JOHN OTTO
IPC: G10L13/06
Filed: 1957-07-04
Abstract: 853,951. Press-button retractive switches; snap-action switches. ILLINOIS TOOL WORKS. July 4, 1957, No. 21216/57. Class 38 (5). A switch comprises a spring-member having two parallel arms anchored together at one end carrying the movable contact and clamped to the base at the other end with one arm in tension and the other in compression, the latter being resiliently stressed into a shallow S-shape from a substantially straight shape when unstressed. As shown, two compression arms 82 with a central tension arm 78 are clamped to the base 12 at 86, the arms 82 engaging shoulders 20. The movable contact 94 normally engages a fixed contact 58 but can be moved to engage a fixed contact or stop 64 by depression of a button 100. The parts may be arranged so that the spring goes over-centre or so that it restores automatically on release of button 100.
Patent GB-532391-A (GB)
Title: Improvements in or relating to electric heating apparatus suitable for cooking and other purposes
IPC: F24C15/10
Filed: 1939-07-21
Abstract: 532,391. Electric resistance heaters; current supply. BERRY, A. F. July 21, 1939, No. 21237 [Class 39 (iii)] [Also in Group XXXV] In order to reduce the maximum voltage on the heating elements of cooking apparatus, instead of connecting an intermediate point of the element to earth as in Specification 388,429, the element is supplied through the low-tension secondary 2 of a transformer, an intermediate point of which is connected to earth. As shown applied to an all-purposes cooking equipment, the hot plate 7 is connected as described above and a graded grill with mid-point earthed is similarly connected. Two hot plates 4 with elements earthed at one end are supplied from the two halves of a centrally earthed auto-transformer 5 connected across the centrally-earthed secondary 2 and provided with tappings to switches 6 whereby the supply to the plates 4 may be separately controlled. The heating elements may consist of coiled heating resistances packed in tubular containers the diameter of the coil at the terminal supply end being smaller than at the central earthed end, so that the heating effect and the necessary insulation is reduced at the supply end. An equivalent result may be obtained by using a resistance element of uniform diameter within a tapering tube.
Patent GB-749972-A (GB)
Title: Cable fastening device
IPC: F16L3/223
Filed: 1954-07-21
Abstract: 749,972. Strap fastenings. SOC. ANON. OUVRARD & VILLARS. July 21, 1954 [Aug. 24, 1953; March 1, 1954], No. 21260/54. Class 44. [Also in Group XXXVI] A group of cables 6, 7, 8, 9, is carried by a support 1 of U-shaped cross-section secured to a supporting surface and provided with crosspieces adjustably mounted between its sides and a flexible strap 10 which is passed successively round each cable and each cross-piece alternately and tensioned to hold the cables firmly against the support 1. The support may have inwardly or outwardly directed flanges against which the cables rest and may have holes 5 in each of its sides for the reception of pins 11 which constitute the crosspieces. One end 10a of the strap is secured to the end pin 11 and the other to a tightening device carried by the support 1. In an alternative embodiment (Fig. 7) the cross-pieces may comprise T-shaped members 15 engaging beneath flanges 1a, 1b of the support 1. Both ends of the strap are brought to the same end of the support and secured to a tightening device thereon.
Patent GB-287388-A (GB)
Title: Improvements in colour photography
IPC: G03C7/04
Filed: 1926-10-11
Abstract: 287,388. Carpmael, W., (Powrie, J. H.). Oct. 11, 1926. Colour photography, screen processes for.-In printing a multicolour screen positive image by lens reproduction from a multicolour screen negative, the positive support is exposed in steps, each step corresponding to one of the colours, a relative movement between the positive support and the projected image taking place between each step so that the exposure of the positive is substantially the same throughout, and the screen structure of the negative image optically eliminated. The process is especially applicable for reproducing kinematograph negative films having a three-line-screen pattern running lengthwise of the film and produced in accordance with the method described in Specification 287,188. In reproducing a film having say, 900 lines to the inch on to a positive film having comparatively fine lines, say, 1600 lines, the projection lens 94, may be moved in two stages, by a stepped cam 91 during the projection of each picture, through the width of the lines as projected on the positive film. The negative may be reduced in size, and the projected lines may be, say, 1800 lines to the inch. A detailed explanation of the result of the overlap of the projected screen image and the screen lines in the positive film at each stage of the reproduction is given. The reproduction of the line screen negative may be on to a positive support having any pattern colour screen of sufficient fineness.
Patent GB-823824-A (GB)
Title: Process for the preparation of mercaptans
Inventor: BENZIE ROBERT JOHN
Filed: 1957-07-05
Abstract: Aliphatic, including cycloaliphatic, mercaptans are prepared by reacting olefines with hydrogen sulphide in the presence as catalyst of a boron trifluoride/methanol complex, preferably BF3.CH3OH. Preferably 1-30% by weight of the olefine of catalyst is used with reaction temperatures of 0-5 DEG  C. Anhydrous conditions are preferred.  Elevated pressures may be used.  The mercaptan layer may be separated mechanically from the catalyst layer which may be recycled.  Alternatively, the catalyst may be decomposed with water and the mercaptan separated from the aqueous phase.  Specification 602,238 is referred to.
Patent GB-431970-A (GB)
Title: Improvements in the purification of hydrogen for destructive hydrogenation
IPC: F25J3/08
Filed: 1934-07-21
Abstract: For the hydrogenation of carbonaceous materials hydrogen is scrubbed with liquefied hydrocarbons which are gaseous at ordinary temperatures, and is subsequently washed with oils to remove traces of the said scrubbing agents.  Liquefied methane, ethane, p  propane, butane, ethylene, or a mixture of these is suitable.  The scrubbing may be performed under pressure.  The hydrogen is preferably subjected to a preliminary purification to remove the greater part of the impurities such as hydrocarbons, carbon dioxide, ammonia, &c.
Patent GB-901616-A (GB)
Title: Improvements in delay circuit arrangements employing transistors
Inventor: BARANY THOMAS ERNEST
IPC: H03K5/13
Filed: 1960-06-17
Abstract: 901,616. Transistor delay circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. April 20, 1961 [June 17, 1960], No. 21461/60. Class 40 (6). A delay circuit comprising a capacitor C connected for variation of its charge by the base current of a silicon transistor T2 in response to the application of an input current, and two further transistors T3, T4 connected to form a two-state pair which changes its state in response to the charge on the capacitor reaching a predetermined level. In the normal state of the circuit, T1, T4 are cut off, T2, T3 conducting, and diode D2 is forward biased so that capacitor C is shunted by R4, D2, R5. Application of a negative pulse to the base of T1 renders it conductive, cutting off diode D2 and allowing C to charge by the base current of T2, variable resistor R6 controlling charging current. As C charges the emitter of T2 goes positive, causing diode D3 to conduct, applying the positive potential to the base of T3. The two-state circuit then switches to the state with T4 conducting and T3 cut off to produce an output pulse at O. Termination of the input pulse allows the circuit to re-set to its initial condition. A thermistor TH may be included to compensate for temperature variations in T2. In a second embodiment in accordance with the Figure of the Complete Specification (not shown) the capacitor C is connected between the base of T2 and earth, and is discharged by the base current when D2 is cut off. Instead of R6 being variable, the base current may be controlled by taking the junction of R4 and C to a tapping on a potential divider connected between N and P instead of to N.
Patent GB-1392122-A (GB)
Title: Fluid flow turbomachinery
IPC: F02K3/11
Filed: 1972-05-08
Abstract: 1392122 Gas turbine jet engines GENERAL ELECTRIC CO 8 May 1972 21469/72 Heading F1J The invention relates to a gas turbine engine which may be operated in two different modes, either as a straight gas turbine jet engine or as a ducted fan engine. The engine is shown in Fig. 1c and comprises an LP compressor or fan 20, an HP compressor 22, combustion equipment 30, an HP turbine 34 connected to drive the HP compressor through shaft 36, and an LP turbine 44 connected to drive the LP compressor 20 through shaft 46. Combustion equipment 40 is disposed in the bypass duct so that the LP turbine is driven by gases from the HP turbine 34 also by gases from the LP combustion equipment 40. A further turbine 50 is disposed so as to be driven by gases from the HP turbine 34 but is mounted on the shaft 46 of the LP compressor and turbine assembly.
Patent GB-1462617-A (GB)
Title: Analogue to digital converters
IPC: H03M1/00
Filed: 1973-05-05
Abstract: 1462617 Analogue to digital converter SOLARTRON ELECTRONIC GROUP Ltd 1 May 1974 [5 May 1973 (2)] 21513/73 and 21514/73 Heading H3H In a dual ramp analogue to digital converter for A.C. or D.C. with an unwanted periodic noise signal, the duration of the ramp for which the unknown voltage is applied is made equal to an integral number of cycles of the A.C. or periodic noise. The integrator operates in two modes. The first mode has time constant T 1  and integrates both A.C. and D.C. while the second mode has time constant T 2  and integrates A.C. only. The system is initially in the first mode, and integrates the unknown voltage for fixed time T 2  in the first mode and then switches to the second mode until the end of the next A.C. cycle. These together constitute the up ramp. The down ramp is generated by a reference voltage and the digital signal is derived from its duration. As shown, the unknown voltage is applied at 10, S A  being closed to short out Cin for a D.C. voltage. The A.C. component passes C 2  to threshold circuit 32 which has an output whenever the voltage at 31 is greater than Œ#. The threshold circuit output is supplied to anti-jitter circuit 36 which is also supplied with clock pulses from 40. The circuit 36 cleans up the edges of square wave pulses which result from the threshold circuit. The output of the anti-jitter circuit sets bistables 52 and 54, permitting clock pulses to pass gate 74 to counter 70 and enabling gate 58 so that square pulses from the threshold circuit operate switch S 1 and function as a synchronous rectifier supplying A.C. to the integrator 16. With a D.C. input, switch 66 is against contact 64 and switch S1 is permanently closed. When counter 70 is full (6000), bi-stable 80 is set and closes S2 to change the integrator time constant to T 2 . At the next pulse from the antijitter circuit 36, bi-stables 80 and 54 are reset, bi-stable 88 is set and the set output of this bistable resets bi-stables 52 which renders S1 inoperative via gate 58 and resets counter 70. S3 is also closed by bi-stable 88 applying reference voltage 24 to the integrator which now has time constant T 1 . Clock pulses pass via gate 74 to the counter until the input of comparator 28 reaches zero when bi-stable 88 is reset, gate 74 closed and the counter reading transferred to display 94.  In an alternative embodiment a rectifier may be incorporated in series with the integrator capacitor C1.
Patent GB-703293-A (GB)
Title: Novel copolymers, process for producing, and compositions containing the same
IPC: G03B17/24
Filed: 1951-09-14
Abstract: In a modification of the process of the parent Specification allyl butyrate is copolymerized with one or more alkenes, which preferably contain from 6 to 10 carbon atoms in the molecule such as 1-octene, in such a way that initially and in any subsequent small interval of time the copolymer formed contains an average of more than 7 but not more than 14 carbon atoms (including the carbon atom of each esterified carboxylic group) per carboxylic group, and has an average molecular weight of at most 1,000. Copolymerization may be carried out in the presence of chain stoppers such as aldehydes and ketones of not more than 6 carbon atoms per molecule, for example acetone and methyl ethyl ketone, and hydrocarbons with a labile hydrogen atom linked to an aliphatic carbon atom which is linked to an aromatic nucleus, such p  as cumene and triphenyl methane.  The copolymer products are liquid and may be used as plasticizers for polyvinyl chloride. Specification 703,287 is referred to.
Patent GB-1308754-A (GB)
Title: Method of producing conveyor belts
IPC: B65G15/36
Filed: 1971-04-19
Abstract: 1308754 Laminates CONTINENTAL GUMMI-WERKE AG 19 April 1971 [16 Feb 1070] 21679/71 Heading B5N A method of producing a conveyer belt of vulcanized natural or synthetic rubber having embedded reinforcing members and including an inner belt core 4 with an outer cover layer 5, 6 on each surface thereof which comprises forming and vulcanizing the belt core and cover layers individually and independently of one another, assembling the layers and bonding them by adhesive means. The core and cover layers may be produced containing no curing agent, or an amount of curing agent which is insufficient to cure the adhesive. The curing or cross-linking agent may be incorporated in vulcanized rubber layers or other carrier elements (8), which are inserted as intermediate layers between the core of the belt and the cover layers. The adhesive may be provided on the core and/or cover layers and/or the intermediate layers. The belt core 4 may contain steel wires 7. The exemplified adhesive is poly- 2-chloro-butadiene. The conveyer belt may be assembled at the site of use of the conveyer installation.
Patent GB-838552-A (GB)
Title: Converter for liquefied gases
Inventor: TAYLER COLIN ANDREW MILLAR
IPC: F17C7/04
Filed: 1957-07-09
Abstract: 838,552. Revaporization of liquefied gases. BRITISH OXYGEN CO. Ltd. July 1, 1958 [July 9, 1957], No. 21704/57. Class 8(2). Vaporization of liquid oxygen in an insulated container 11, Fig. 1, having a gas discharge duct 12 is effected by ambient heat conducted through a metal rod 21, Fig. 2, having a head 22 capable of being seated against or unseated from a metal housing 20 secured beneath the container wall according to the position of a cammed rotary valve cock 15 which in the position shown connects the gas discharge duct 12 to a vent duct 18. A 90 degree clockwise rotation of the valve allows the head 22 to become seated and connects duct 12 to a consumer line 19. Further means for unseating the head 22 comprises a bellows capsule 25 subjected to gas pressure in the duct 12, and a further heat source comprises an electric coil 27 the circuit of which controlled by the bridge members 22, 20.
Patent GB-625534-A (GB)
Title: Improved method of and apparatus for assembling insulating rings on a central core
IPC: H01B13/18
Filed: 1947-08-07
Abstract: 625,534. Cables. WESTERN ELECTRIC CO., Inc. Aug. 7, 1947, No. 21778. Convention date, Dec. 13, 1942. [Class 36] A method of assembling insulating rings on a central core comprises advancing the core at a fixed rate and, in a single continuous operation, cutting a slit in each of a plurality of insulating rings and applying them to the central core with the slit held open. The insulating rings are dropped into a hopper 16 and by the rotation of a cone-shaped member 25 are caused to fall into an annular slot formed between the lower ends of the cone 25 and the bin 23. They are then directed to guides 21, 22 by means of guiding members 42, 43 and are carried down to members 19, 20, where they are transferred to notches 74 in feed wheels 17, 18. Just below the position where the feed wheels 17, 18 receive the discs 32 are knives 76, Fig. 4, which cut a radial slit in each disc. Extending around the feed wheels and in vertical alignment with the knives 76 are retainers 78 with which the slit in each disc will engage, thus forcing the discs round with the feed wheels and at the same time keeping the slits slightly open until discs 32 reach the central conductor 80 when they are slid on to the conductor with a wiping motion, alternate discs being supplied from opposite sides. The slits close, holding the rings firmly in place on the conductor. An outer conductor may be applied. The discs are preferably made from polyethylene, but other materials such as cellulose acetate or mixtures of cellulose acetate and cellulose butyrate or polymerized vinyl compounds or mixtures thereof may be used.
Patent GB-996986-A (GB)
Title: Improvements in or relating to curved nuts
IPC: F16B37/04
Filed: 1962-06-05
Abstract: 996,986. Anchor nuts; locking nuts to work. C. W. ATTWOOD. June 5, 1962, No. 21784/62. Heading F2H. The invention relates to a nut for securing fittings to metallic channel material 20 having edge portions 21 turned at right angles to the side walls and again turned inwardly at 22 to provide a longitudinal slot 23, the flanges 22 being provided with sharp, double bevelled edges. The nut comprises an elongate plate 10 having a threaded aperture 11 for the reception of a screw, the nut being arcuately bowed in the direction of its width to allow the longitudinal edges 12A to provide biting contact with the bevelled edges of the flanges 22 when the nut has been passed through the slot 23 and rotated to straddle the flanges 22. The nut is rhomboidal in plan, the shorter diagonal 10b being of a length which is less than the distance between the pair of opposed parallel side walls of the channel. In a modification, Fig. 8 (not shown), the thickness of the metal around the opening 11 is increased.
Patent GB-201770-A (GB)
Title: Improvements in or relating to sawing machines
IPC: B23D47/04
Filed: 1922-08-10
Abstract: 201,770. Herbert, Sir A., and Vernon, P. V. Aug. 10, 1922. Work-holders. - A number of metal bars to be sawn are held in a slot approximately tanential to the saw between fixed and adjustable walls A, B. An upper clamping member D is provided. Packing pieces, one with a rounded or bevelled face, may be used in the slot to set the bars in a curve.
Patent GB-263901-A (GB)
Title: Improvements in lubricating devices for internal combustion engines
IPC: F01M11/10
Filed: 1926-06-01
Abstract: 263,901. Whitaker, F. June 1, 1926. Lubricant conveyed by fluid.-Lubricant is carried into the induction pipe of an internalcombustion engine by air drawn through a tube 6 depending into lubricant contained in a glass or other transparent vessel 2, the air issuing from the those 6 passing in bubbles through a. glass or other transparent tube 9 to apertures 15 in a central tube 3<a> connected to the induction pipe by a pipe 14 and provided with an adjustable valve 10. The tube 6 and a tube 7 similar thereto but closed at its upper end support an annular member 8, which supports the tube 9 against the top of the vessel 2, packing c, d being interspaced. The body 10<b> of the valve contains a spring-pressed ball 11 co-operating with indents f in a sleeve 5a extending from a nut 5 screwed on the tube 3<a>, which nut holds the parts of the vessel 2 together.
Patent GB-799970-A (GB)
Title: Electric resistors with integral molded metal terminals
IPC: H01C1/144
Filed: 1956-07-13
Abstract: 799,970. Direct connections between conductors. SPEER CARBON CO. July 13, 1956 [Aug. 23, 1955], No. 21819/56. Class 38 (1). A resistor comprising a body 11 of compressed powdered resistance material has integral terminals 12 which are formed in situ of compressed metal powder at the same time that the body is formed. As shown in Fig. 2, small quantities of metal powder 17, 19 and resistor mix 18 are poured into an opening 14 in a die 13 and compressed under hydraulic pressure by rods 16, 20. The metal powder may comprise equal parts of copper powder and tin powder or 79 per cent copper powder, 20 per cent tin powder and 1 per cent lead powder.