baber/WOPTO huggingface dataset:
Patent GB-1100554-A (GB)
Title: Improvements in or relating to heated light-transmitting material
Inventor: STRANG JOHN MARTIN
IPC: B32B27/00
Filed: 1964-07-03
Abstract: 1,100,554. Laminates. BARR & STROUD Ltd. 22 March, 1965 [3 July, 1964], No. 27483/64. Addition to 933,469. Heading B5N. [Also in Division H5] A heatable light-transmitting structure comprises a composite structure of two or more light-transmitting layers bonded together by synthetic resinous light-transmitting bonding means, at least one of the layers being of thermoset synthetic resinous material and the bonding means being of thermoset synthetic resinous material, and heating means embedded in thermoset synthetic resinous material of the composite structure. Exemplified composite structures comprise: (a) a thermoset synthetic resin layer bonded to a synthetic resin layer by a light-transmitting thermoset synthetic resin cement; (b) a glass layer and a thermoset synthetic resin layer bonded together by a lighttransmitting thermoset synthetic resin cement; (c) a thermoset synthetic resin layer bonded directly to a synthetic resin layer, and (d) a thermoset synthetic resin layer self-bonded directly to a glass layer. The preferred heating means comprise fine wire elements embedded in the cement or in the thermoset synthetic resin layer. Specified materials for the thermoset synthetic resin layers are polyesters, epoxy resins and silicones, the materials specified for the other resin layers (where present) being acrylic resins, polystyrene, polyvinyl chloride, polyvinyl butyral, polyamides, polycarbonates and cellulose derivatives.
Patent GB-1114601-A (GB)
Title: Method of recording the refractive index derivative appearing in the focal plane of an optical stria system
IPC: G01N21/45
Filed: 1965-06-29
Abstract: 1, 114, 601. Determining refractive index derivative. M. CHRIST [trading as FIRMA MARTIN CHRIST FABRIK ELEKTRO-MEDIZINISCHER APPARATE]. June 29,1965 [July 6, 1964], No. 27533/65. Heading G1A. In a method of recording the refractive index gradients across a sample wherein the optical test system uses an input slot of light, a first stria lens, a second stria lens and a second rotatable slot one on each side of the sample to produce a light and dark field image of the derivative curve on a focal plane, the curve is recorded on a moving chart by a photo-electric device which may be a photo-multiplier arranged to scan the image. The optical input to the photo-electric device may be by way of a narrow slot, which may be adjustable and which is mounted on the front of the cell to scan with the cell. The second oblique slot may be a two field polarizer and the image on the focal plane may be reflected to provide a simultaneous optical output which may be photographed. The black and white fields of the image may be reversed by rotation of the two field polarizer. The apparatus may be applied to determining the sedimentation constant in a centrifuge, to electrophoretic analysis or to making diffusion measurements. The use of double quartz plates to compensate for solution colour errors when using white light is also referred to.
Patent GB-781912-A (GB)
Title: Improvements in and relating to cathode-ray tube systems
IPC: H04N9/24
Filed: 1953-10-07
Abstract: 781,912. Television. PHILCO CORPORATION. Oct. 7, 1953 [Oct. 10, 1952], No. 27549/53. Class 40 (3). In a colour-television receiver in which synchronization of the scanning of the colour reproducing elements in the picture reproducing tube screen with received colour signals is controlled by means of " indexing " signals derived by scanning " indexing " stripes included in the tube screen with a carrier modulated electron beam, desaturation of the colours by the latter beam is minimized by deriving a control signal from the " indexing " signals and employing it to modify the operating potentials of the picture tube. As shown in Fig. 1, the " indexing " signals, which are developed across load resistor 46 and employed in known manner to control via elements 60, 80 the application of colour signals from terminals 62, 64, 66 to the picture beam control electrode 20 of cathode-ray tube 10, are generated by means of a separate " indexing " beam which is amplitude-modulated at a carrier frequency by means of a pilot oscillator 52 connected to the " indexing " beam control electrode 18 and scanned over the screen 34 synchronously with the picture producing beam. In accordance with the present invention the " indexing " signals are also employed to modify the operating potentials of the picture tube so as to minimize the desaturating effect of the " indexing " beam on the colours produced by the picture beam and this is achieved by means of a control circuit 82 comprising a cathode-follower stage 84 supplied with the "indexing" signals from amplifier 56 and feeding a rectifier 86 which produces a D.C. potential proportional to the amplitude of the " indexing " signal across condenser 110, this potential being added to that of an adjustable bias source 50 so that the D.C. potential between the indexing beam control electrode 18 and the cathode 16 is equal to the sum of these two potentials. In operation, this potential is arranged so that, having regard to the amplitude of the carrier wave from oscillator 52 and the cut-off voltage of electrode 18, an optimum ratio of peak/average current of the indexing beam results such that a clearly defined " indexing " signal is produced without producing undesirable background lighting of the picture (i.e. colour desaturation). Due to ageing of the tube, however, the cut-off characteristic of electrode 18 may change, resulting in a change of the ratio of peak/ average beam current from the optimum value and this change is compensated by the change in the potential of electrode 18 due to the change in the potential across condenser 110 which results from the variation in amplitude of the " indexing " signals when the peak value of the beam current varies. Specifications 745,353 and 781,911, [Group XL (a)], are referred to.
Patent GB-1197188-A (GB)
Title: Improvements in or relating to Electron Discharge Tubes
Inventor: ROACH RICHARD GREVILLE
IPC: H01J5/06
Filed: 1967-06-15
Abstract: 1,197,188. Discharge apparatus. ENGLISH ELECTRIC VALVE CO. Ltd. 25 March, 1968 [15 June, 1967], No. 27582/67. Heading H1D In a high voltage electron discharge tube, e.g. a power grid tube, with an evacuated envelope including a ceramic part B<SP>1</SP> sealed to a metal electrode part A by way of metallic sealing means 1M which extend outside the ceramic envelope part, the tube has an enclosing member S of insulating material arranged in the region of the sealing means to enclose the metalceramic seal to prevent tracking of the ceramic by ionization. Preferably, covering member S is of moulded silicone rubber, and is moulded right round the external flared metal member 1M and 2M at the seals to fill up the spaces between the flares and the ceramic.
Patent GB-738503-A (GB)
Title: Improvements in and relating to electro-luminescent cells
IPC: H05B33/26
Filed: 1952-11-03
Abstract: 738,503. Electroluminescence. GENERAL ELECTRIC CO. Nov. 3, 1952 [Nov. 3, 1951], No. 27624/52. Drawings to Specification. Class 39 (1). An electroluminescent cell comprises a phosphor suspended in dielectric material between a conducting grid and a conducting layer, or between two conducting layers one of which is transparent, or two interfitting grids on one side of a plastic film containing the suspended phosphor. The grid may be a mat of parallel or intersecting stripes either of silver paste printed on the plastic by a silk screen process, or of evaporated aluminium. The conducting layer may be of sprayed, painted or printed silver, or of evaporated aluminium, or of aluminium foil. The conducting stripes may be covered with paint or plastic to protect them or to reduce corona. Layer thicknesses are given in the Specification. A resistance in the electrical circuit reduces surge and dielectric breakdown.
Patent GB-263975-A (GB)
Title: Improved process for impregnating unpaved roads
IPC: C09K3/22
Filed: 1925-11-03
Abstract: 263,975. Allchemin Allgemeine Chemische Industrie Akt.-Ges., and Lichtenstern, R. Nov. 3, 1925. Macadamized roads; roads, special materials for.-The formation of dust on unpaved roads is minimized by the application to the road surface of a colloidal solution containing some constituents adapted to form on the road a layer insoluble in water and impervious to oil, and other constituents adapted to form above said layer an oily dust-binding medium. The insoluble and impervious layer may be constituted by a lime soap formed by the interaction of a sodium or potassium soap of naphthene acid and the calcium oxide or carbonate present in the road materials. For example, the surface of an existing road may be treated with a colloidal solution of 1-1¢ parts of naphthene soap in 30-40 parts of a heavy residual oil containing paraffin, to which 60-70 parts of a normal oil distillate have been added; or a composition containing 20-40 parts of naphthene soap and up to 100 parts of mixed oils may be used when the road material contains sufficient lime to react with all the soap present. In new road construction, the composition is applied, with or without water, both to the broken-stone-sand layer and to the completed road surface.
Patent GB-699248-A (GB)
Title: Improvements in and relating to refrigerating apparatus
IPC: F25D13/06
Filed: 1950-11-13
Abstract: 699,248. Freezing food &c. DOUGLAS, J., and STERNE & CO., Ltd., L. Feb. 6,1952 [Nov. 13, 1950], No. 27664/50. Class 29 [Also in Groups XXX and XXXIV] In a chamber for freezing foodstuffs or hardening ice-cream wherein air is circulated by a fan over refrigerating coils and over the goods, the goods are carried on trays which are automatically and successively loaded at the top of the chamber on to L-shaped bars 18 each pair of which carries a plurality of trays, the bars being carried on two pairs of endless chains 16, 17 driven intermittently by an electric motor 21A so as to lower the trays step by step which are ultimately deposited on a conveyor 25 which removes them to a roller conveyer 36, control means being provided so that the bars 18 are stationary when the loading and discharge is being effected. Conveyer 25 may be reversible to discharge in either direction. A feed conveyer supplies trays through an opening 2 and the leading one is engaged by a pivoted finger 33 on a pusher block 27 reciprocated through links, 28, 30, a crank 29 and a belt 31 by the shaft of one end of the con veyer 25. The finger 33 pushes the leading tray on to a table 34 aligned with the topmost pair of bars 18 and in its return motion, the finger 33 rides under the next tray. The trays push preceding trays along the table 34 and on to the bars 18. A safety switch on the feed conveyer responds to a misaligned tray to stop the machine. The conveyer 25 is driven through shaft 26 and variable gearing 37 by a motor 21. Adjustment of the gearing 37 adjusts the time taken for a tray to transverse the machine. Conveyer 25 may have a dog fixed thereto to engage positively the trays. Conveyer 36 may have an end stop operating a switch so controlling the machine that a second batch of trays cannot be discharged as long as a batch is on the conveyer 36. The motor 21A drives a cam 22 actuating a switch 22A to stop motor 21A and to start motor 21. Motor 21 drives a cam 26A actuating a switch 26B to stop motor 21 and to start motor 21A. The travel of the bars 18 between stops may be varied. Two assemblies of the bars 18 and their associated supports may be arranged in longitudinal alignment. In a modified loading arrangement, fingers on a horizontally disposed endless chain arrangement pick trays from the feed conveyer and carry them to the bars 18. The bars 18 may be cut-away or ribbed to reduce the area of contact with the trays. To prevent freezing up of any pivoted part of the apparatus, a bearing (Fig. 7) may comprise an outer stationary part 43 having drainage holes and an inner rotary part 44 of triangular cross section, only the apices of which bear on the part 43. According to the Provisional Specification, the control circuits may include a timing device and loss of cold can be prevented by feeding the trays into the chamber through a revolving door device.
Patent GB-1397084-A (GB)
Title: Actuators for stroke control in hydraulic machines
IPC: F04B49/00
Filed: 1971-06-12
Abstract: 1397084 Variable displacement pump and motor control JOSEPH LUCAS (INDUSTRIES) Ltd 7 June 1972 [12 June 1971] 27667/71 Heading G3P [Also in Division F2] The displacement of a pump or motor in a hydrostatic transmission is controlled by a piston 14 subjected at its right-hand side to the pump output pressure, as transmitted by selector valve 16, and at its left-hand side to a servo pressure established by spool 20 which can connect the left-hand side to exhaust via 30, 29, 31, 28, 32 or to the right-hand side via 30, 29, 27, the piston tending to follow-up displacement of the spool. A sleeve 34 on the spool coacts with the ends of chamber 35 to limit relative displacement of the spool, and also serves to connect the spool to plunger 36, 38 which is biased against stop 44 by spring 43 acting on a seat 42 engaging abutment 41 on the plunger. The plunger extends with clearance through the seat 42 and is urged rightwards by a control pressure admitted at 46 or 47 to chamber 37, the latter having an optional bleed 50. Bores 39, 40 in the plunger maintain a pressure balance across the seat 42. In the arrangement shown, plunger 36, 38 has an overall length such that when it abuts stop 44 the piston 14 assumes a zero-stroke position. Such an arrangement may be used in allowing control of a pump in a hydrostatic transmission in response to an external control pressure admitted at 46 or 47, or in allowing control of a motor in a transmission in response to motor outlet pressure admitted at 46 or 47. In the latter case, the effective diameter of plunger 36, 38 and the rate of spring 43 may be chosen to maintain  the power output (pressure x stroke) of the motor constant. In a modified arrangement, the overall length of plunger 36, 38 is reduced so that when it abuts stop 44 the piston 14 assumes a maximum stroke position. In this case an external control pressure is admitted at 46 or 47 to allow control of a motor in a hydrostatic transmission, or a pump output pressure is admitted at 46 or 47 to allow pump output power to remain constant.
Patent GB-423491-A (GB)
Title: Improvements in and relating to buttonhole sewing machines
IPC: D05B3/06
Filed: 1934-09-27
Abstract: 423,491. Sewing-machines. HUGHES, R. M., 72, Cannon Street, London.-(International Button Hole Sewing Machine Co. ; 502, Harrison Avenue, Boston, U.S.A.) Sept. 27, 1934, No. 27730. [Class 112] The needle-jogging mechanism of a buttonhole-sewing machine is provided with means for varying the amplitude of the jogging movement independent of means for varying the position of the needle thrusts at the buttonhole slit. The needle is mounted in a needle bar 6 which reciprocates in a head 7 on a stitch frame 8. The needle bar is reciprocated from a cam 9 on a cam shaft 10, the cam 9 having a path 11 receiving a follower 12 carried on the end of a lever 13 connected to the needle bar at 15. The needle bar extends through a sleeve 16 which in turn extends axially through a gear 17 by which the needle is turned when sewing round the end of a buttonhole. The hole through the gear is enlarged to permit the necessary freedom for jogging the needle bar. The sleeve 16 has two inclined grooves 19, and the gear 17 has two ears 20 each with a shoe 21 having a toe 22 occupying one of the grooves 19. The reciprocation of the needle causes the jog by reason of the inclined grooves 19 engaging the toes 22, thereby producing the slit thrusts and depth thrusts of the needle. The amplitude of the jogging movement of the needle is altered by shifting the pivot 37 in the slot 36 of the member 30 which reciprocates the sleeve 16 over the rod 29 and cam 23. The position of the slit thrusts relative to the buttonhole slit is varied by an adjustable connection between the rocker 31 and the arm 30, the relation between the two arms 30 and 32 being thus varied.
Patent GB-503684-A (GB)
Title: Improvements in or relating to electrolytic condensers
IPC: H01G9/02
Filed: 1937-10-12
Abstract: 503,684. Electrolytic condensers ; coated fabrics. HUNT, Ltd., A. H., and FISHER, J. H. Oct. 12, 1937, No. 27751. Drawings to Specification. [Class 37] [Also in Group VIII] An inter-electrode spacing element for an electrolytic condenser comprises a rubber membrane rendered conductive by an ionizable substance, dispersed in the rubber mass, of a kind miscible with the rubber without causing coagulation and being free from coagulant during dispersal in the latex. The preferred addition is a polyhydric alcohol or an amine. The membrane may be sprayed on an electrode or on a gauze or paper support and coagulated by heat. The spacer may be used in dry condensers in which case the electrolyte paste is absorbed by the fabric support, or the coated electrodes may be used in " wet " condensers. Specification 476,555 is referred to.
Patent GB-1224458-A (GB)
Title: Preparation of low surface area catalysts
IPC: B01J29/06
Filed: 1969-06-02
Abstract: 1,224,458. Cracking catalysts. W. R. GRACE & CO. 2 June, 1969 [26 June, 1968], No. 27782/69. Heading B1E. Zeolite promoted clay containing SiO 2 -Al 2 O 3  cracking catalysts having surface areas of 100-275 m<SP>2</SP>/gm. are made by (a) felling an alkali metal silicate solution containing clay with acid (b) aging the gelled solution (c) combining the aged solution with an aluminium salt (d) combining the mixture with a crystalline zeolite promoter (e) washing and drying the product to produce a particulate catalyst having an alkali metal oxide content below 1% by weight, characterised by adding sufficient acid to the silicate solution of step (a) to effect gelation within a period of from 5 to 90 minutes. Other physical properties, e.g. particle size and pore size of catalyst particles are disclosed. Specified clays are Kaolin, halloysite, bentonite and meta-Kaolin. The preferred promoter is fanjasite. In examples the catalyst is subjected to ion-exchange wih a rare earth salt.
Patent GB-298229-A (GB)
Title: Improvement in the links of anti-skidding chains for automobile wheels
IPC: B60C27/08
Filed: 1928-09-28
Abstract: 298,229. Markwick, F. Oct. 7, 1927, [Convention date]. Tread bands. - Autiskidding devices of the metal chain type for application to wheel tyres are provided with special links comprising a body portion 8 bent at the ends to form two oppositely extending hooks 10 the bills of which have calks or sharp edges 12 to bite into the road-surface. The links may be of V- shape transversely with a hook and calk occupying each side of the V, the body 8 being disposed at the apex. The calks may be of triangular section, Fig. 1, or square section, Fig. 5. The links may be incorporated in the transverse skid chains C, Fig. 1, or joined together to form a chain which occupies a recess G in the tread of the tyre.
Patent GB-683211-A (GB)
Title: Railway vehicle truck
IPC: B61F3/06
Filed: 1949-10-31
Abstract: 683,211. Railway-vehicle bogies. DEHN, S. G. (General Steel Castings Corporation). Oct. 31, 1949, No. 27859/49. Class 103 (vi). A railway vehicle bogie has a laterally swinging longitudinally extending bolster 9, Figs. 1, 3, supported by leaf-springs 8 from spring planks 7, the springs being adapted to engage the ends of transverse bolster members 10, 10a, positioned at opposite sides of a middle axle. The planks 7 are in turn suspended by swing hangers 6 from the truck frame 5, which frame is carried by helical springs 4 from equalizers 3 mounted on axle boxes 2. Each axle carries an electric motor M and a gear housing H positioned as shown, the axles being unequally spaced lengthwise of the truck. A central longitudinal member 11 extends between the members 10, 10a, over the middle axle and its motor M, and has a centre support point 12 which co-operates with a centre support point 13 on the vehicle underframe and supports approximately 80 per cent of the load carried by the truck. The vertical axis of the centre-point is on the longitudinal centre line of the truck but to one side of the middle axle. Near each end of the member 10a and on the other side of the middle axle are other support points 14, positioned directly above the springs 8 and cooperating with points 15 on the vehicle frame to support 20 per cent of the load carried by the truck. The load is thus provided with a threepoint support. The preferred weight distribution is obtained with bolster springs of the same deflection rate at both ends of the bolster but of different working heights, but substantially equal loads are carried by the wheel and axle assemblies. When the vehicle body is jacked up the truck is suspended from the underframe, locking devices 20, 21 and 22 preventing separation of the truck frame and bolster, and locking devices 23, 24 preventing separation of the centre points 12 and 13.
Patent GB-630674-A (GB)
Title: Improvements in and relating to electric circuit breakers
IPC: H01H83/08
Filed: 1945-10-23
Abstract: 630,674. Automatic circuit - breakers. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 23, 1945. Convention date, Nov. 2, 1944. [Class 38(v)] A D.C. circuit-breaker, particularly for use in aircraft, is opened when a reverse current in a conductor-bar 3 sets up a flux in a yoke 47 in opposition to that due to a permanent magnet 40, and enables a stressed spring blade 33 to snap an armature 32 away from a pair of pole-pieces 43. A spring 28 thereupon rotates a latch support 25 about a pivot pin 26 so as to disengage a latch 21, pivoted to the support at 24, from a roller 22 carried by an operating member 16, which is then rotated clockwise by a spring 37 to open main-contacts 9 and arcing-contacts 12. The member 16 is pivoted at 18, and connected by a togglelink 17 to a U-shaped bridging member 7, which is slidable between guides 10 and carries the contacts 9, the contacts 12 being carried by a bridging-member 11, resiliently supported between a pin 13 and the base 8 of the member 7 by a spring-blade 14, so that the contacts 12 close before, and open after, the contacts 9. The pivot 18 is engageable with a slot 39 in the member 16, so that the spring 37 itself urges the contacts into engagement, and the friction at the pivot is thereby reduced. When the member 16 reaches the end of its opening travel, the roller 22 engages an arm 34 of the spring-blade 33 and returns the armature 32 to the attracted position. The armature is centrally, loosely attached to blade 33 by a short rivet 36, a guide member 36<SP>1</SP> being also provided. The breaker is manually re-closed by thumbing the part 56 of the member 16, the roller 22 deflecting the latch 21 against the action of a spring 27, which returns the latch 21 against the pivot 26. The sensitivity of the breaker may be varied by a screw 49, 50 which passes through the ends 48, 51 of the yoke 47, and the pole-pieces 43, 44, to provide an adjustable-gap between the pole piece 44 and the yoke-end 51, Fig. 4. To prevent the breaker being tripped by small reverse-current pulses of short duration, a time-delay may be introduced by fitting copperrings around the legs of the pole-pieces and the yoke, Fig. 6 (not shown). The yoke 47 is arranged to saturate with heavy currents, so as to avoid demagnetisation of the magnet 40 with heavy forward-currents, and to ensure that heavy reverse-currents will not raise the armature-flux to a sufficiently high value in the reverse direction, to stop the armature tripping. The armature and its co-operating pole-faces are preferably chromiumplated.