baber/WOPTO huggingface dataset:
Patent GB-1466704-A (GB)
Title: Production of piezoelectric bodies
IPC: H01L41/257
Filed: 1974-02-19
Abstract: 1466704 Making piezoelectric elements SIEMENS AG 19 Feb 1974 [29 March 1973] 7399/74 Heading H1E A method of producing a piezoelectric body comprises mixing with a bonding agent annealed granules of a ferroelectric material and polarizing the mixture by application of a voltage for a prescribed time at a temperature below the Curie point of the ferroelectric material, the bonding agent having at the said temperature a specific electrical conductivity # B  related to that of the ferroelectric material # K  by the equation # B  = n.# K  where n has a value between 0À1 and 100. The value of n must be greater than E C .# X /E B  where E C  is the coercive field strength of the ferroelectric material and Eg is the breakdown field strength of the bonding material. Under these circumstances, currents flowing in the body during polarization or not produce deterioration of the piezoelectric properties. The Specification gives more stringent criteria for choosing the conductivity of the bonding material. The ferroelectric material may be PZT and the bonding agent may be a synthetic resin, e.g. an epoxide resin mixed with a hardener. Alternatively, a glass-forming mixture of metal oxides may be used as bonding agent. In order to obtain better dispersion of the granules, the bonding agent may be dissolved in a solvent which is subsequently allowed to evaporate. The invention may be applied to the manufacture of piezoelectric wafers about 100 Á in thickness and containing granules of sizes between 0À1 and 1 Á. The mixture is spread by rolling upon an aluminium plate and allowed to harden. The composite plate may be used as a microphone diaphragm.
Patent GB-927034-A (GB)
Title: Improvements in or relating to frets for domestic fireplaces
Inventor: JENNISON ALAN ALFRED
IPC: F24B1/191
Filed: 1961-03-01
Abstract: 927,034. Fireplace frets. RICHARD HAIGHTON Ltd. March 1, 1962 [March 1, 1961], No. 7424/61. Class 126. A fret comprises a cast iron frame 10 with a central opening 12 over which a facia piece is secured. The facia may be cast iron, chromium plated or enamelled sheet steel or chromium plated, enamelled or anodised expanded metal backed by sheet metal. The frame may be stove enamelled and a central screw and nut 22 may be provided as a handle. Combustion air enters through openings 14.
Patent GB-853270-A (GB)
Title: Improvements in or relating to electrical counting circuits
Inventor: BLACKBURNE NORMAN FREDERICK
IPC: H03K23/58
Filed: 1957-03-06
Abstract: 853,270. Electronic counting apparatus. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. March 4, 1958 [March 6, 1957], No. 7439/57. Class 106 (1). A pulse counting circuit for dividing by a number not a power of 2 comprises a number of bi-stable binary counters and a feedback path through a circuit similar to that of the binary stages. Fig. 2 shows a circuit for dividing by 30 adapted to produce output pulses at OPC every 30 seconds in response to ¢ second input pulses every second from a master clock, by the use of binary counters 1, 2, 4, 8 and 16 and feedback stage F which advances the counter by 2 every cycle to reduce the division ratio from 32 to 30. Fig. 4 shows the feedback stage F, in which transistor T2 is normally conducting but which is switched by a positive pulse on the " set " input IS to provide a positive excursion at the collector of T1 and hence on output OPC, and is reset by the next input clock pulse on IR to produce a positive pulse on line FB for advance of the counter. The counter stages 1, 4, 8 and 16 are generally similar to the feedback stage F, except that the single input circuit is connected to both transistor collectors through diodes MR1 and MR2 and the single output is taken direct from the collector of T2; in stage 2 the feedback input to FB is preferably connected directly to the collector of T1.
Patent GB-798269-A (GB)
Title: Material consisting of ferrosilicon-containing particles and process for preparing same
IPC: B22F9/08
Filed: 1956-03-09
Abstract: Ferro-silicon particles having a major percentage of round or globular particles with a smooth surface, are obtained by spraying melts containing 10-25 per cent Si and 0.08 to 0.5 per cent Al. These particles are especially useful for preparing heavy media for sink/float separating processes.  Gas or vapour pressures of 6-13 atmospheres and temperatures of 1200 DEG  to 1600 DEG C. are preferred in the atomizing step.  Ferro-silicons outside the above ranges can be used by suitably adjusting the composition before spraying, such as by the addition of SiO2 containing material to remove all or some of the Al by oxidation.  If all the Al is removed the appropriate amount must be added to the melt before spraying.
Patent GB-849830-A (GB)
Title: Pharmaceutical compositions and process for preparing same
IPC: A61K33/24
Filed: 1957-03-07
Abstract: In making tablets, granules containing pharmaceutical agent are mixed with granules containing sweetening agent, the mixture is blended with a flavouring agent and a hydrophilic starch and compressed into tablets.  A binding agent may be included.  The invention is particularly directed to the production of vitamin or of anti-histamine tablets.
Patent GB-689224-A (GB)
Title: Process for the production of light-metal castings having metallic inserts
IPC: B22D19/00
Filed: 1951-04-02
Abstract: In making aluminium or other light-metal castings having iron, steel or other heavy metal inserts, these are first degreased and de-oxidized and then immersed in a bath of a zinc-containing aluminium alloy at 580 DEG -850 DEG C.  The zinc content should not exceed 20 per cent: a suitable alloy both for the bath and for casting the body of the article is zinc 6-10 per cent, copper 0.4, iron 0.15, magnesium 0.7, silicon 0.15, titanium 0.15, chromium 0.25, manganese 0.1 and aluminium the remainder.
Patent GB-323425-A (GB)
Title: Improvements in or relating to infusers and the like
IPC: A47J31/06
Filed: 1929-03-09
Abstract: 323,425. Covill, H., Suffling, R., and Millen, M. W. March 9,1929. Infusers ; pots.- An infuser 1 is suspended in a teapot or like receptacle by means of expanding springy arms 2 which project from the side of the infuser so that the bent ends 3 rest upon and grip the rim that supports the lid. The arms 2 may be secured to the metal band encircling the infuser. The infuser may be constructed of perforated metal or of fabric.
Patent GB-315387-A (GB)
Title: Improvements in or relating to luminous electric discharge tubes
IPC: H01J61/04
Filed: 1929-03-09
Abstract: 315,387. General Electric Co., Ltd., (Assignees of Patent-Treuhand-Ges. fiir Elektrische Gliihlampen). July 14, 1928, [Convention date]. Vacuum tubes; metallicvapour apparatus. - To prevent deposition on the glass walls of luminous discharge tubes having a gas or metallic-vapour filling, the electrodes are surrounded by conducting rings or cylinders which are connected to the corresponding electrodes through a high resistance. In the example shown, an electrode d, which may consist of a sheet-metal vessel or a .body of carbon, graphite, or a sintered mixture of a metal and non- metallic thermionic substance, is surrounded by a cylinder e. The cylinder may be supported by a clamp f and members g or by the conductor h A resistance i is inserted between the electrode and shield leads c, h. The cylinder is considerably longer than the electrode to prevent evaporation from the edges of the latter and may have a smooth or rough surface or may be corrugated. The electrode and cylinder may be cleansed by heating in a vacuum and then cooling or further heating in an atmosphere consisting of the gas filling. Alternatively, the cylinder and the electrode may be disconnected from each other and a glow discharge passed between them in a suitable gas filling e.g. neon at a pressure of 15 to 20 mm.
Patent GB-765158-A (GB)
Title: Device for conveying material in dust or powder form
IPC: B65G53/18
Filed: 1955-03-17
Abstract: 765,158. Pneumatic conveyers. HERMANNS, W. March 17, 1955 [Aug. 23, 1954], No. 7838/55. Class 78 (1). In devices for conveying material in dust or powder form along a channel 7 of the kind in which a hose 4, provided with air - permeable walls and supplied with compressed air, is disposed in the bottom 6 of the channel, the hose is flattened and contains a metal plate 5 of slightly smaller width than half the circumference of the hose. This plate may be of aluminium and may be coated with a synthetic resin varnish. The lower surface of the hose is rubberized to prevent air issuing therefrom. The upper surface of the plate may be provided with one or two ribs 8.
Patent GB-568564-A (GB)
Title: Improvements in or relating to ultra high radio frequency thermionic oscillators
IPC: H03F1/08
Filed: 1940-05-03
Abstract: 568,564. Valve generating circuits. FERRANTI, Ltd., GWYDER, R. G. B., and HEAPS, J. G. May 3, 1940, No. 7967. [Class 40 (v)] In a valve oscillator operating at ultra-high frequencies, the filament leads, or the cathode and heater leads, are inter-connected by condensers, and one of the leads is connected to earth through a sharply-tuned circuit of high impedance, white the other lead or leads include aperiodic impedance. As shown in Fig. 1 for a directly-heated valve 1, the filament 7 heated by a battery 11 has one leg earthed through a quarter-wave line 10 and the other through a choke coil 12. A tuned Lecher system 4, 5 of the kind described in Specification 568,378 is associated with the anode and grid of the valve and is connected to an aerial 20. When an indirectly-heated valve is used, the cathode lead or one of the heater leads includes a quarter-wave line, whilst the other two leads each include a choke coil. Condensers are connected between the cathode and the respective heater leads, Fig. 2 (not shown).
Patent GB-698904-A (GB)
Title: Improvements in or relating to means for handling the covers of soaking pits and other furnaces
IPC: C21D9/70
Filed: 1951-04-05
Abstract: 698,904. Operating soaking pit covers. STEIN-ATKINSON, Ltd., and WEBB, C. L. A. April 4, 1952 [April 5, 1951 ], No. 7968/51. Class 65 (i) Means for operating' a soaking pit cover 1 suspended from a travelling carriage 8 and adapted to be raised and lowered comprise a rope 12 attached at 11 to the carriage and also to the cover raising and lowering means, the rope passing intermediately around a pulley 15 on the carriage and around a drum 14 having means to rotate it and being located between the attachment 11 and said pulley, and means to vary the effective length of the rope between the drum and the point of attachment to the raising and lowering means. The latter comprise a framework 10 to which are connected the upper arms 9 of bell-crank levers journalled on the axles 5 of the carriage, the cover being suspended from the lower arms 3 of the bell-crank levers. Wheels 6, mounted on the axles, run on rails 7. Attachments 11, to which the respective ends of the rope are connected, are located at one end of the carriage, and pulleys 15 are located at its other end. Drums 14 are keyed to a stationary shaft 17. The rope passes from pulleys 15 to pulleys 16 of the same diameter as the drums and also keyed to the shaft, and thence to pulleys 18 and pulleys 13, the latter being mounted on the framework 10. The bight of the rope between pulleys 13 passes over a spring-loaded pulley 23 attached to the framework. In a modification pulley 23 is omitted, the rope being in two parts, the respective ends of which are attached to pulleys 13. Pulleys 18 are mounted in carriers 29 interconnected by a rope 30 which passes over stationary pulleys 31 and a pulley 32 adapted to be moved longitudinally by hydraulic apparatus 33, or, alternatively, by an electric or other motor. To raise the cover, pulley 32 is moved towards the carriage thus drawing pulleys 18 away from the latter and rocking the bell-crank levers in the appropriate direction. Stops 27, 28 on the framework and carriage respectively limit the rocking movement. Traversing of the carriage is effected by imparting rotary movement to shaft 17 by means of a shaft 21 driven by an electric motor mounted on a platform under which the carriage moves and which also supports pulleys 31 and apparatus 33. Stops are arranged to position the carriage correctly above the pit. It is stated that shaft 17 could be located substantially midway between attachments 11 and pulleys 15, whereby the carriage could be moved in either of two opposite directions as desired.
Patent GB-1133138-A (GB)
Title: Casting of resins in cavity moulds
Inventor: SIMPSON WILLIAM
IPC: B29C39/42
Filed: 1966-02-24
Abstract: 1,133,138. Casting of resins. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 4 Oct., 1966 [24 Feb., 1966], No. 8175/66. Heading B5A. Resins are cast in a mould cavity which has been evacuated at least to a pressure of 10 mm. Hg. and then filled with the vapour of a substance which boils at atmospheric pressure in the range -40‹ C. to 200‹ C., the evacuation and filling being repeated until no permanent gases are left in the cavity, and the resin is then introduced in liquid form under a pressure of one atmosphere or more, and finally the resin is cured. The substance is preferably water, an aliphatic monohydric alcohol from ethanol to octanol, ethylene oxide, propylene oxide, epichlorhydrin, butyl glycidyl ether, an aromatic hydrocarbon or an aromatic or aliphatic chlorinated hydrocarbon. The resin may be an epoxy resin cured with anhydride or amine, or a glycol maleate/styrene resin with a peroxide curing agent and cobalt naphthenate accelerator.
Patent GB-404499-A (GB)
Title: Improvements in processes for cinematography in colours
IPC: G03B33/00
Filed: 1933-03-17
Abstract: 404,499. Colour kinematography. BONNEAU, P. E., 110, Rue de Menilmontant, Paris. March 17, 1933, No. 8185. Convention date, March, 17, 1932. [Class 97 (i).] Three or more negative colour-record images are taken simultaneously on a film larger than a standard positive film and are printed without re-arrangement on a positive film so that each group of colour-records occupies the space of a standard image ; the positive colour-records are projected simultaneously in superposition, and with a magnification such as to produce projected images of normal size. Registration marks 20 may be produced on the negative film, and outside the image fields, by collimating means 24, having a diaphragm 26 and prism 25, placed within the fields of the camera objectives. The marks are printed on the positive film, and are projected with the images thereon ; the operator may adjust the projecting system to superpose them and secure registration of the projected colour-record images. A prism may be placed in the light beam to deflect the projected images of the marks above or to the side of the projection screen, and a telescope may be provided to enable the operator to examine them easily.
Patent GB-556195-A (GB)
Title: Improvements in or relating to apparatus for calibrating or checking pressure gauges and like instruments
IPC: G01L27/00
Filed: 1942-06-15
Abstract: 556,195. Pressure gauges. BARNET INSTRUMENTS, Ltd., and GRANT, C. R. A. June 15, 1942, No. 8195. [Class 106 (ii)] An apparatus for calibrating or checking pressure responsive instruments such as pressure gauges, comprises a variable volume chamber, arranged in parallel with the instrument to be tested, and supplied with fluid under pressure, the force derived from the pressure in the variable volume chamber acting on a spring which, by its amount of deflection, serves to give an indication of the pressure of the fluid. A reservoir supplies fluid to a force pump 15 which supplies the fluid under pressure to a pressure gauge 17 being tested and to a cylinder 2 to displace a piston 3, the rod 5 of which acts on a plate spring 11, the deflection of which is measured by a micrometer gauge 12. The pressure may be obtained by calculation, or the gauge 12 may be calibrated in pressures according to the spring 11 used. The gauge 12 may be replaced by a movable mirror and optical beam. Electrical contacts may be used to indicate when the gauge contacts spring 11 or when the spring has been deflected a certain amount.
Patent GB-870585-A (GB)
Title: Drawing boards
Inventor: GORHAM PERCY HAROLD
IPC: B43L13/04
Filed: 1959-03-10
Abstract: 870,585. Draughting-machines. DRAWING EQUIPMENT PRODUCTIONS Ltd. March 2, 1960 [March 10, 1959], No. 8287/59. Class 97(3) A drawing board 1 has shafts 3 passing therethrough adjacent its top and bottom edges, each shaft 3 carrying at its ends toothed wheels 4 around which pass endless chains 5. The horizontal limb of an angled plate 10 is secured to the underside of a rule 8 at each of its ends and carries a pin 15 whose shank passes through a chain 5 so that its head prevents disengagement. The vertical limb 12 of each plate 10 carries studs 11 which slide within a channel 13 provided at each side of the board 1, the extent of travel being limited by stops 14. The chains and wheels are protected by cover plates 16.
Patent GB-873757-A (GB)
Title: Improvements in or relating to capsule manufacture
Inventor: WATT PETER RIDGWAY
IPC: A61J3/07
Filed: 1958-03-14
Abstract: 873,757. Moulding capsules. VITAMINS Ltd. March 16, 1959 [March 14, 1958], No. 8307/58. Class 87(2). Filled capsules are moulded by forming drops of filling material enclosed by capsule material, and to obtain capsules of a size different from that produced by allowing the drops to form freely under gravity, centrifugal force is applied to the materials by mounting the nozzles 29, 30 on a rotating shaft 20. Alternatively the nozzles may be mounted tangentally of the axis of rotation. In addition, to assist in premature separation of the drops, air or kerosine may be fed downwardly through an outer nozzle 12 over the drops formed in nozzles 10, 11. The capsules may be sprayed with kerosene, vegetable oils or starch through nozzles 32, the sprayed material being collected at 35 and recirculated by a pump 38. The capsules may be dusted with graphite, talc or aluminium particles. The capsule matrial may be gelatine, zeim, wheat gluten, polyvinyl acetate or sodium alginate and may contain a light and heat reflecting material, e.g. aluminium powder.
Patent GB-582544-A (GB)
Title: Improved valve voltmeter
IPC: G01R1/36
Filed: 1944-05-03
Abstract: 582,544. Thermionic valve voltmeters. B.P.L. (INSTRUMENTS), Ltd., and DIGBY, B. May 3, 1944, No. 8314. [Class 37] A valve voltmeter 1, 2 incorporates an input voltage limiter comprising an impedance 9, a diode 6 or other unidirectional conductor and a biassing voltage E2, in series across an input voltage E1. If this voltage exceeds a predetermined value, depending on the value of E2, the diode becomes conducting. Biassing voltages for the diode and valve 2 may be derived from suitable tappings, e.g. 15, 16 on a potential divider 10, across an independent source 13, 14, which also provides anode voltage for valve 2. Modified arrangements may include adjustable tappings on the potential divider. or separate supply sources for the biassing voltages.
Patent GB-1371617-A (GB)
Title: Induction heating of strip from powder
Inventor: BARKER VERNON
IPC: B22F3/24
Filed: 1972-03-24
Abstract: 1371617 Sintering green metal strip by induced current BRITISH IRON & STEEL RESEARCH ASSOCIATION 24 March 1972 [31 March 1971] 8323/71 Heading C7D Rolled green metal strip or sheet e.g. Fe or Fe alloy such as stainless steel is passed through a furnace where it is sintered by induced alternating current, a part of the strip at the start of heating being covered with a contacting metal layer. The green strip 36 is transported on endless belt 12 via gas tight roller seals 9 through induction furnace 1 operating at 400K-10M Hertz, through cooling section 2 and gas tight seals 10 to coiler 20. Hydrogen is introduced at 11 and a Cu sheet or mesh is placed on the leading edge of the green strip before it enters the furnace. The strip may be hot rolled between the furnace 1 and the cooler 2 and also between the cooler and the coiler.
Patent GB-231527-A (GB)
IPC: B21G1/04
Filed: 1925-03-30
Abstract: 231,527. Aachener Maschinenbau- Ges. March 81, 1924, [Convention date]. Needles. - The feeding mechanism of a machine for milling grooves in needles comprises a slide b<1> carrying a magazine q<2> for the needle blanks and an oscillatory-head e<1> having a radial slot e<3> to which the blanks are delivered one at a time and presented to the milling-cutters as the slide b<1> is reciprocated by a cam d. The periphery of the head is toothed and gears with a sector h constantly pressed into contact with a fixed, adjustable stop t by a spring u. The head also carries a pin n adapted to engage with an adjustable stop m on the slide. The blanks s are urged by a block r pulled by a rubber band p, towards a guide-slot q<6> in a block q<4> on the slide, the slot e<3> in the head registering with the slot q<6> at the commencement of the feed movement of the slide to allow the end blank to fall into position. A stationary cam i on the spindle of the rotary head moves the blank radially as the head rotates, the blank being retained in its slot by a cover-plate f.
Patent GB-210319-A (GB)
Title: Improvements in billiard and like tables for games
IPC: A63D15/00
Filed: 1923-03-24
Abstract: 210,319. Stedman, A. G., and Stevens, W. March 24, 1923. Billiards, tables for.-A billiard table comprises. in combination a concrete supporting structureconsisting of legs and bearers forming an integral unit, a concrete bed mounted thereon, a weatherproof playing surface secured to the bed, concrete guard rails detachably secured to the bed, cushions mounted on the rails and removable pockets serving to position the cushions. The bed is made of slabs 3 of concrete or ferro-concrete joined by keys 4 and supported on concrete or ferro-concrete legs 2. The playing surface consists of weatherproof material 10 such as a composition of rubber, or rubber amalgam and/or of cork. The bearers 6 are dovetailed and cemented into the legs. The cushions 11 are detachably secured to guard rails 9 by means of key-hole slots and are held in position longitudinally by detachable pocket frames which have pins hooking into holes in the guard rails. The guard rails are attached to the bed by means of screws 8.
Patent GB-740327-A (GB)
Title: Improvements relating to injection-type internal combustion engines
IPC: F02B3/00
Filed: 1954-03-23
Abstract: 740,327. Direct injection engines. DAIMLER-BENZ AKT.-GES. March 23. 1954 [March 24, 1953], No. 8466/54. Class 7(3) In a four-stroke engine wherein fuel injection occurs on the suction stroke and
Patent GB-256890-A (GB)
Title: Improvements in check tills
IPC: A45C1/12
Filed: 1926-03-29
Abstract: 256,890. Wohlfart, F., and Noris- Kassenfabrik Ges. March 29, 1926. Tills.-In a check till for use in restaurants &c. where the waiters pay in chips, the chips are placed on a plate 3 and moved forward by grippers 8 arranged on a, reciprocating carriage, 4, the, grippers sliding over the plate 3 to push the chips towards a till-drawer 2. In the return movement of the carriage, pawls 10 on the grippers strike notches 12 in the plate 3 to lift the grippers so that they move idly over the ships. In a modification, the grippers have abutments which are lifted in the idle movement by a bar centrally disposed in the till. The grippers may have teeth to engage with ribs on the plate.