baber/WOPTO huggingface dataset:
Patent GB-1438348-A (GB)
Title: Heating hair roller
IPC: A45D2/36
Filed: 1973-09-12
Abstract: 1438348 Heated hair curlers L'OREAL 12 Sept 1973 [15 Sept 1972] 42906/73 Heading A4V A heated roller comprises a hollow cylindrical body 1 containing a reservoir 7 for combustible material held under pressure which diffuses through a member 18 to provide a flow of gas which is directed to a catalyst 16 through a duct 3 having a diameter from 0À1 mm. to 0À8 mm. The gas is ignited by an igniter, e.g. a Piezo-electric igniter or an optical system of short focal length, inserted into body 1 through radial vanes 4. The member 18 may comprise a membrane permeable to the gas, e.g. of dimethyl silane, or a pulverulent material e.g. powdered calcium silicate, steatite or graphite. The catalyst may comprise platinum foam. The duct 14 may be supported by an elastomeric member 13 shaped as shown or formed as a plug inserted in an opening in an upper wall of reservoir 7. The reservoir may contain butane which is introduced through valve 9-11. The roller body is formed with projections 2 which increase in height from the central zone towards the ends of the roller. Ventilation holes 3, 6a are provided in the body 1 and a cap 6 which supports to reservoir. The roller may comprise a material which changes colour to indicate that a desired temperature has been reached. To hold hair in place on the roller, an arcuate clip having a radius of curvature less than that of the outer surface of the roller may be used.
Patent GB-1473060-A (GB)
Title: Alkylation process for production of motor fuels
IPC: C07C67/00
Filed: 1975-10-20
Abstract: 1473060 Alkylating isoparaffins TEXACO DEVELOPMENT CORP 20 Oct 1975 [4 Nov 1974 30 Dec 1974 (2)] 42949/75 Heading C5E [Also in Division B1] C 4 -C 6  isoparaffins are alkylated in the liquid phase with C 3 -C 5  mono-olefins to give gasoline blending stocks using a catalyst comprising HFSO 3  and H 2 SO 4  in the weight ratio 0À11/1 to 0À32/1, from 0 to 3% wt. water and 0 to 10% wt. of acid oils (formed by reaction of sulphuric acid with hydrocarbons present in the alkylation system) and the catalyst having a titratable acidity of 16À5 to 21 meq/gm. The isoparaffin may be iso-butane and the olefins propylene, butylene or a mixture thereof. The isoparaffin and olefin may be employed in a liquid volume ratio of 2 : 1 to 20 : 1 at 0‹ to 100‹ F. and 10- 150 p.s.i.g. using a reaction mixture comprising 40-60 vol. per cent hydrocarbon phase and 60-40 vol. per cent acid catalyst phase and an olefin volume space velocity of 0À1-1À0 hr.<SP>-1</SP> After reaction, the acid phase may be separated for recycle for re-use, a minor proportion being withdrawn for regeneration and replaced by fresh catalyst. The catalyst may be regenerated by hydrolysis of HFSO 3  to HF followed by reconversion to HFSO 3  by reaction with SO 3  and oxidation of H 2 SO 4  first to SO 2  then to SO 3  followed by reconversion to H 2 SO 4 . The resulting acids are then mixed in appropriate proportions. The examples describe the alkylation of isobutane with (i) butylene and (ii) a mixture of butylene and propylene.
Patent GB-1481554-A (GB)
Title: Frequency converter for feeding a parallel oscillatory circuit containing an inductive load
IPC: H02M7/525
Filed: 1974-10-03
Abstract: 1481554 Automatic control of inverters AEG ELOTHERM GmbH 3 Oct 1974 [19 Oct 1973] 42980/74 Heading G3R [Also in Division H2] In a frequency converter of the type in which a first AC supply is converted to DC by means of phase-controlled rectifiers 3 and feeding an inverter 5 having a parallel oscillatory output circuit 6, the rectifier 1 has an automatic control system 2, 9, 12 for maintaining constant current on the DC side and the inverter 5 has an automatic control system 16, 18, 21 for maintaining constant the switching-off time t L . The output voltage of the inverter 5 is automatically controlled by two alternative methods:- (a) when the damping on the resonant circuit is low, the AC output is controlled by adjustment of the frequency of operation relative to the resonant frequency of the circuit 6, the DC current Ig remaining constant and (b) when the damping is high the AC output of the inverter 5 is controlled by adjustment of the DC current Ig, the switching-off time t L  remaining constant. A discriminator 27 is provided for automatically changing the control mode when the DC current Ig or the time tL fall below predetermined limits. The invention is applicable to inductive hardening or inductive melting. The current on the AC side is monitored at 2 and compared with a reference 10, the error being amplified at 12 and fed to a phase control system for thyristors 3 so as to maintain constant current I g . The switching-off time t L  is determined by means of a transformer 16 which monitors the anode voltage of one of the thyristors and compares it with a reference 19, the frequency of trigger pulses from block 21 being adjusted so as to tend to maintain the time t L  constant. The AC output voltage is monitored at 23 and compared with a reference 26, the error being fed via a discriminator 27 either to the time t L  control loop 18, 21 or to the DC current control loop 9, 12 depending on whether the AC current, as monitored by comparator 33, or the time t L , as monitored by comparator 28, are less than predetermined limits.
Patent GB-1436784-A (GB)
Title: Method of making a semiconductor device
IPC: H01L21/74
Filed: 1973-09-13
Abstract: 1436784 Semi-conductor devices HITACHI Ltd 13 Sept 1973 [4 Oct 1972] 43043/73 Heading H1K A locally oxidized zone 18 of an N- (or P-) type Si substrate 10, e.g. providing lateral device isolation in a complementary MIS integrated circuit, adjoins a P<SP>+</SP>- (N<SP>+</SP>-) type region 16 and overlies an N- (P-) type region 17, which two regions have been previously formed respectively by diffusion and ion implantation through the same window 13 as that defining the area to be oxidized. The region 16 prevents formation of an inversion layer at the Si/oxide interface. Further P- (N-) type regions may subsequently be diffused on opposite sides of the isolation structure 16/17/18, and circuit elements such as complementary MIS devices may be formed therein. The planar upper surface of the structure illustrated results from the preliminary etching of a recess through the window 13 before the diffusion and implantation steps, but this recess may be omitted. The masking layer shown comprises SiO 2 l2 on Si 3 N 4 ll, but Al 2 O 3  may replace the latter. Reference has been directed by the Comptroller to Specification 1,353,489.
Patent GB-889314-A (GB)
Title: Improvements in or relating to electric gating circuits
Inventor: LEAKEY DAVID MARTIN
IPC: H03K17/60
Filed: 1959-12-18
Abstract: 889,314. Transistor gating circuits. GENERAL ELECTRIC CO. Ltd. Dec. 2, 1960 [Dec. 18, 1959], No. 43103/59. Class 40(6). A gating circuit comprises a transistor 1 having its base-emitter circuit shunted by a diode 2 connected with its direction of forward conductivity between base and emitter electrodes opposite to that of the base-emitter diode in the transistor; a signal input source 3 connected to apply signals between base and emitter; and a gating input source 7 controlling an impedance connected to the input circuit so as to render the diode 2 conducting or non-conducting, thus rendering the transistor non-conducting or conducting. As described in the Figure accompanying the Provisional Specification, the impedance is a diode 5. In the absence of gating pulses, diodes 2 and 5 conduct and the transistor is cut off due to the reverse bias between its base and emitter, preventing signals from source 3 reaching load 9. Positive gating pulses cut off the diodes, allowing the transistor to become conductive. In the modification in the Figure accompanying the Complete Specification, the diode 5 is replaced by a transistor 10 of opposite conductivity type to transistor 1, and negative gating pulses are applied to its base to cut it off.
Patent GB-947651-A (GB)
Title: One-piece moulded soles for welted footwear
IPC: A43B13/22
Filed: 1960-12-15
Abstract: 947,651. Soles. H. FUNCK. Dec. 15, 1960 [Dec. 17, 1959], No. 43167/60. Heading A3B. A moulded sole 20 of flexible rubber or plastic for welted footwear has the middle portion of at least the front part of the sole in a bowl shape open downwards and rising shallowly above the edge strip 20a by which it is attached to the welt 4 of the shoe upper thus filling the hollow space in the base of the shoe upper formed by the vamp gusset 2 and the welt, the cavity in the bowl-shaped sole piece being equipped with moulded-on supporting members 23 such as ribs or studs &c. constituting a firmly gripping tread. The depth of the sole cavity is greater than the hollow space so that there is a certain tension in the bowl 21. The supporting members designed as ribs moulded into the cavity of the sole may be deeper than the cavity and extend approximately transversely to the sole's axis. They may have a saw-tooth cross-section pointing towards the rear in the forepart and to the front in the heel portion. These ribs may be interrupted by grooves in the direction of the sole's longitudinal axis to increase the self cleaning action of the sole. In this case the ribs may be arranged in the shape of an arrowhead. At the points of transition of the supporting members into the sole recesses 24 may be provided which give extra air cushioning and ventilation. If a thick tread is not desired then the cavity of the bowl is made less deep, see Fig. 3, and cross ribs 17 and 18 are moulded into the shell so as to fill in the hollow space at the base of the shoe upper with minimum increase in weight.
Patent GB-921815-A (GB)
Title: Improvements in or relating to moulds for use in the production of foamed elastomers
Filed: 1959-12-21
Abstract: 921,815. Moulding foamed elastomers. DUNLOP RUBBER CO. Ltd. Dec. 21, 1959 [Dec. 22, 1958], No. 43261/59. Class 87(2). A mould for use with the expanding elastomer foams, such as the polyurethanes, comprises a pan 10 to contain the elastomer and having a cover 11, hollow cores 12 open at their lower ends being secured to the cover at spaced intervals and depending downwardly into the pan, the dimensions of the opening at the lower end of each of the cores 12 substantially corresponding with the cross-sectional dimensions of the hollow of the core. The upper ends of the cores 12 may be either open or closed. Slots may extend upwardly from the lower ends of the cores 12 and these slots may be of uniform width or taper upwardly. During the moulding and expansion of the polyurethane foam or other expanding elastomer, when the mould itself has become completely filled with expanded foam, the open lower ends of the cores 12 permit enough free movement of the expanding foam to prevent pressure build-up of the foam beyond critical limits and avoid possible densification and/or collapse of the foam structure.
Patent GB-964899-A (GB)
Title: Improvements in or relating to control apparatus for fluid-pressure operated motors of mining and other machines
IPC: F15B20/00
Filed: 1960-12-20
Abstract: 964,899. fluid-pressure servomotor systems. GEB. EICKHOFF MASCHINENFABRIK U EISENGIESSERIE. Dec. 20, 1960 [Dec. 29, 1959; Jan. 23, 1960], No. 43682/60. Addition to 876,236. Heading G3P. [Also in Divisions E1 and F2] In apparatus in which, as in the parent Specification, either of a pair of hydraulic motors 1, 2 driving mining machinery is put into operation by displacement of a main valve 3 from its central, neutral position, in which an auxiliary pump 6 discharges to the low pressure side of the main pump 4 and also acts to retract spring-loaded plungers 5, 5<SP>1</SP> to enable the main valve to be displaced, and in which valves 110, 21 vent the plungers 5, 5<SP>1</SP> in the event of failure of the pressure from the pump 6 or overload of one of the motors, respectively, the low pressure side of the main pump 4 is connected through a valve 9 and control valve 11 with a further motor 10 operative, e.g., to raise and lower a pivotally mounted drumtype cutter in accordance with the height of a mine roof. An overload valve 12 loaded by a spring and by the pressure on the plungers 5, 5<SP>1</SP> controls application of pressure to the valve 21 in the event of overload. The motors 1, 2 are also protected by differential-pressure responsive overload valves 13, 13<SP>1</SP>.
Patent GB-437193-A (GB)
Abstract: 437,193. Gramophones. BRAUN, W. M., 17, Gretschmarstrasse, Frankfort-on-Main, Germany. April 19, 1934, No. 11800. [Class 40 (ii)] A base plate for an electric gramophone is moulded from a synthetic resin or like material and has three or more of the following components formed integral therewith : a housing 1 for the tone arm pivot, a bracket 6 for supporting the tone arm when not in use, a cup 8 for used needles, a housing 5 for the volume control, a guide 9 for the speed control lever, a guide 13 for the automatic stop mechanism, and a housing for the control switch.
Patent GB-1269700-A (GB)
Title: A method of accurately etching a metal layer
IPC: C23F1/02
Filed: 1969-09-04
Abstract: 1,269,700. Etching; etching apparatus. HITACHI Ltd. 4 Sept., 1969 [18 Sept., 1968], No. 43935/69. Heading B6J. To control the extent of the etching of a metal layer 12 (e.g. copper foil) on a substrate 11 there is provided on the metal, in addition to the normal resist pattern 13, a further resist pattern 14, Fig. 2 (plan view), of such a dimension (a-b) that when the underlying metal is etched through (by undercutting) the metal covered by the normal resist pattern has been etched to the desired extent. Terminals C and D are connected to a source of electricity and a break in the line C-D is used to stop the etching. The dimension a of the normal resist pattern corresponds to the desired dimension of the metal pattern after etching, b, plus the amount by which the metal 12a is undercut during etching. Etching apparatus.-The metal-supporting substrate 11 may be clamped in a frame 15 and the terminals C and D connected to conducting rails 16 and 17 by strips 18 and 19. Strips 18 and 19 terminate in pins which contact the metal through the resist of pattern 14. The whole assembly 21 is moved between etchant spray nozzles 28-33 by rollers 22. During movement, terminals 28a-33a (connected to electromagnetic valves 28b-33b) contact the rails 16 and 17. The valves remain open to spray etchant if the line C-D of the pattern 14 is unbroken. When the degree of etching is such that the line C-D is broken subsequent nozzles are de-activated as the assembly 21 is advanced. Surplus etchant is collected in tank 25 and recirculated.
Patent GB-1088572-A (GB)
Title: Reinforced article and process
Inventor: COOK PAUL MAXWELL
IPC: B29C48/09
Filed: 1964-10-28
Abstract: 1,088,572. Coated surfaces. RAYCHEM CORPORATION. Oct. 28, 1964 [Oct. 28, 1963], No. 44020/64. Heading B2K. [Also in Division B5] A heat-recoverable article comprises an article formed of synthetic plastics material having the property of elastic memory, and provided with a knitted reinforcement. The elastic memory material may be united to a fusible member, the melting point of which is lower than the melting point of the synthetic plastics material having the property of elastic memory. The elastic memory material may be an extruded tube, with the fusible member provided on its inner or outer surface with the knitted reinforcement located on the inner or outer surface or internally of the composite member. The elastic memory material and/or the fusible member may be combined with the knitted reinforcement by compound extrusion, by the -process of e.g. Specification No. 1,033,959 adapted by, for example, feeding a knitted tube between the outlets of the two extrusion dies, so that the reinforcement lies on the junction between the fusible and elastic memory materials. The knitted reinforcement, which may be single or multi-layered, may be formed of e.g. glass, metal, textile fibres or synthetic polymer fibres and may be provided with an adhesive which facilitates bonding between the reinforcement and the material to which it is applied, while offering only low resistance to movement of the knit reinforcement as the article changes dimension during heat recovery. In one embodiment, (Fig. 1) a tubular core extruded at 2 is passed through pan 3 containing adhesive 4, and then through knitting machine 9 wherein a reinforcement is knitted onto the core 1. The reinforcementcovered core is then passed through extruder 11, wherein a jacket 12 is extruded around the reinforced core, and the jacketed core is subjected to irradiation at 13 to cross-link one or more of core, jacket and adhesive. Elastic memory is imparted to the tube 19 (Fig. 2) by passing it through glycerol heating bath 21, and cooling the tube at 23 while it is in expanded state 22 caused by application of an internal pressure. A prefered knitted reinforcement comprises two layers of knitted fabrics whose axes are at an angle to each other and to the axis of the tube. In an Example, a tubular film of polyethylene is extruded, coated with a film of polyamide adhesive, covered with a knitted reinforcing of glass fibre, and coated again in polyamide adhesive. A polyethylene jacket is then extruded around the core, the compound tube is irradiated, and elastic memory imparted thereto by passage through a glycerine bath at 295F followed by inflation and cooling in the inflated state.
Patent GB-1146065-A (GB)
Title: Improvements in or relating to single-lens reflex cameras
IPC: G03B7/06
Filed: 1966-10-04
Abstract: 1,146,065. Reflex cameras; objectives therefore. ERNST LEITZ G.m.b.H. Oct. 4, 1966 [Oct. 5, 1965;Dec.22, 1965], No.44169/66. Heading G2A. Single lens reflex cameras comprise (Fig. 1) an interchangeable objective 0 having a rotatable ring 1 for pre-selecting a diaphragm aperture and a photo-cell 15 located behind the objective, the ring 1 having a cam 2 co-operating with a cam follower 3 for displacing a reference needle 10 in dependence on the pre-selected aperture, so that this needle may be aligned with a needle 13 which is deflected in accordance with the illumination of the photo-cell 15. The needle 10 is displaced by a pin 9 having a pinion 8 which is movable by a rack 3a on cam follower 3 and by a rack 7 movable in accordance with the exposure time and film sensitivity set by a knob 6. The cams of the interchangeable objectives are of the same shape, the same height of cam being allotted to the widest aperture of each, although with very wide apertures the shape of the cam may be adjusted to compensate for the difference between optical and geometrical aperture. In a modification Figs. 3 to 5 (not shown) the cam follower (103) is pivoted and has an arm (103e) displaceable on depression of a knob 120 for temporarily reducing the aperture during viewing, so that when knob 120 is depressed, the reference needle (110) is set to the position corresponding to to the widest aperture; knob (120) maybe locked in the depressed position by a bar (123) which is released by a handle 126 or an actuating shutter release (129); the lever arrangement between the cam follower and reference needle may be replaced by gear-wheels Figs. 12 and 12a (not shown). In a further embodiment (Fig. 10) a pre-selector ring 301 has a cam 302 which operates, via a cam follower 303 and a rack and pinion, a reference needle 310 and which has an abutment 301a which halts the movement of an abutment 380b of a diaphragm 380 to set the aperture when it is released either by a push button 383 for viewing, in which case the needle 310 is simultaneously set to the position corresponding to the widest aperture by a spindle 389 and cam follower 303, or by a lever 384 operated by the shutter release simultaneously pivoting the reflex mirror 385.
Patent GB-943806-A (GB)
Title: An oxidation process
Inventor: VUSSE JAN GERRIT VAN DE
IPC: C01B7/14
Filed: 1960-12-30
Abstract: 943,806. Iodine. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Dec. 29, 1961 [Dec. 30, 1960], No. 44767/60. Drawings to Specification. Heading C1A. Iodine is produced by interacting hydrogen iodide and nitric acid in an aqueous medium at a temperature of 80-200‹ C. and a pressure of 1.5-10 atmospheres. A 5-200% excess of nitric acid, assuming the reaction of 1 mol. of nitric acid with 3 mols. of hydrogen iodide, may be employed. The time of reaction may be 10- 120 minutes. Gas evolved during the reaction may be washed first with a portion of the aqueous hydrogen iodide feed, then with aqueous sodium carbonate to produce aqueous sodium iodide which may be added to the hydrogen iodide feed, and the residual nitric oxide oxidized with air and absorbed in water to form nitric acid for recycling to the process. Iodine may be removed from the aqueous phase after reaction by cooling or stripping with steam followed by extraction by washing with a portion of the aqueous hydrogen iodide feed. The gas evolved during the reaction may be removed in two successive reaction chambers followed by a chamber for separation of liquid iodine and an aqueous phase (Fig. 1, not shown); or separation of the gas, liquid iodine and aqueous phase may be effected in a single chamber having a plurality of vertical partitions (Fig. 2, not shown). Two examples are given.
Patent GB-1413609-A (GB)
Title: Solid propellant element
IPC: F02K9/36
Filed: 1973-09-26
Abstract: 1413609 Propellants SOC NATIONALE DES POUDRES ET EXPLOSIFS 26 Sept 1973 [26 Sept 1972] 45169/73 Heading F3A A solid, cylindrical, centripally-burning, propellant element for producing a constant thrust, comprises two or more limbs 1, 2, 3, 4, 5 terminating in respective semicircular arcs A 1 B 1 , A 2 B 2  ... of radius e, where e is the combustion thickness of the element, one end of each of said semicircular arcs being tangential to a right circular cylinder 6 circumscribing the element, and the element having a single combustion residue 7 disposed centrally in the element. The combustion thickness e is such that: R/10<e< 2R/3, where R is the radius of cylinder 6. Various shapes of the limbs are described (Figs. 2, 3 and 4, not shown). The element is fixed in a rocket motor by means of a threaded rod 15 extending within the combustion residue. Inhibiting coatings 17 and 18 are provided.
Patent GB-1451581-A (GB)
Title: Rope clamps
IPC: F16G11/02
Filed: 1974-10-18
Abstract: 1451581 Rope clamp GERRO HOLDING CO Ltd 18 Oct 1974 45283/74 Heading D1T A rope clamp comprises a sleeve or ferrule having a sleeve-shaped part of malleable plastics material having a central hole of constant cross-section and a wall thickness smaller at its central portion than at its ends. The wall thickness may increase continuously or in steps towards the ends. The centre hole may be of oval or circular section.
Patent GB-1193326-A (GB)
Title: Two-Wheeled Vehicle
IPC: B62K11/06
Filed: 1967-10-05
Abstract: 1,193,326. Twc-wheeled vehicles. TEODORO CARNIELLI & C. S.p.A. 5 Oct., 1967 [7 Oct., 1966; 14 July, 1967], No. 45366/67. Headings B7E, B7H and B7J. A two-wheeled vehicle, e.g. a pedal-assisted motorcycle, comprises a front wheel fork 26, 27 secured to a shaft extending parallel to and rearwardly spaced from the handlebar shaft 16 (carried in the steering head 15), and linked thereto for concurrent rotation therewith by rods 24 pivoted to a cross-piece 22 on the shaft 16. The handlebars comprise two braces 17 pivoted about inclined axes to the shaft 16 so that they may be swung rearwardly and inwardly and downwardly. The rods 24 may be non-parallel. Levers 29 are pivoted to the front fork parts 27 and are connected to tension springs in the parts 27. The rear fork structure 34 serves as a parcel grid and has feet 36 which support the up-ended vehicle. A wheeled stand 40 is operable by a knob 42. The pedals 20 are hinged to the cranks 21. A tool box 47 is provided. In a modification, a carrying handle is provided, and the rear fork structure is formed by a laterally-spaced pair of shaped tubes extending from front to rear of the member 10 which also forms the fuel tank. The engine is protected by wire netting. The headlamp is secured to the front mudguard.