baber/WOPTO huggingface dataset:
Patent GB-644892-A (GB)
Title: Improvements in or relating to pulse generators
IPC: H03K3/16
Filed: 1947-11-27
Abstract: 644,892. Pulse generating circuits. PHILIPS ELECTRICAL. Ltd. Nov. 27, 1947, No. 31431. [Class 40 (vi)] A pulse generator comprises a blocking oscillator and a crystal controlled oscillator in one valve stage so that pulses are generated having the frequency and stability of the crystal. Fig. 1 shows a pentode valve in which the cathode and grids 1 and 2 are coupled to operate as a crystal-controlled oscillator, the frequency of which is determined by the crystal 8 and the tuned circuit 10, 11. The grid 3 and anode 5 are coupled to oscillate at a much higher frequency in blocking oscillator manner by means of the circuit 15, 16, 17 and 18. The system oscillates during one half-period of the high natural frequency of coil 15 or 16 either or both of which are timed, grid 3 then blocks, the screen-grid current increases and due to the transitron effect of the inter-electrode capacity which couples grids 2 and 3 the blocking effect is additive and the valve is conductive during only a fraction of each period of the crystal frequency when a highly damped oscillation of very high frequency is produced, Fig. 2b and c (not shown). The time constant of network 17, 18 and the small phase shift due to coil 10 ensure that current passes through the valve only once per period of the crystal frequency. Diode D ensures that passage of charging current to capacitor 17 is not prevented by grid 1 blocking the current flow through the valve.
Patent GB-1146058-A (GB)
Title: Production of calcium fluoride agglomeration products
IPC: C21C7/076
Filed: 1966-07-13
Abstract: 1,146,058. Calcium fluoride agglomerates. C. N. GUENEV. 13 July, 1966 [14 July, 1965], No. 31482/66. Heading C1A. Calcium fluoride lumps are produced by binding calcium fluoride with casein or casein glue. These lumps may be coated with a mixture of waterglass and barium sulphate to form a protective layer. The amount of binder needed is generally about 1 % or less of the weight of the calcium fluoride used and the percentage calcium fluoride in the final lumps should be at least 98%.
Patent GB-1463930-A (GB)
Title: Open-end spinning unit containing means for cleaning fibrous material
IPC: D01H4/36
Filed: 1975-07-28
Abstract: 1463930 Dirt separation in open end spinning openers F STAHLECKER and H STAHLECKER 28 July 1975 [22 Aug 1974] 31495/75 Heading DIN An open end spinning unit has a supply roller 1 with a supply table 2 which feed an opener roller 7 and an impurity removal opening 18 is located immediately behind the supply table 2. The opening 18 may extend e.g. over  of the opener circumference. An air stream 17 is introduced tangentially through an opening 16. A further air stream which presses a fibre beard 9 against the opener roller may be supplied below the feed table 2 or through apertures in the feed table member, Fig. 2 (not shown). Impurities may be removed by a conveyor 27 located at the bottom of a chamber 19 which is entered through the removal opening 18.
Patent GB-1086409-A (GB)
Title: Improvements in or relating to an arrangement for the automatic lifting of a plasma arc torch
Inventor: HAASE LOTHAR
IPC: B23K10/00
Filed: 1966-07-13
Abstract: 1,086,409. Cutting by fusion. KJELLBERG ELEKTRODEN & MASCHINEN G.m.b.H. IN VERWALTUNG. July 13, 1966, No. 31520/66. Heading B3V. A lifting device for a plasma arc torch 1 is controlled automatically by a relay 14 in the main arc circuit so as to operate automatically upon ignition of the main arc. A cutting torch 1 is lifted by rack-and-pinion mechanism (4), (5), Fig. 2 (not shown), actuated by a solenoid 11 supplied through rectifier 17 and contacts 12, 13. Contact 13 is normally closed and contact 14 is closed by relay 14 when the arc is initiated. After an adjustable delay, dependent upon the thickness of plate to be pierced, a relay 15 opens the contact 13 and the torch falls against a stop (3), Fig. 2 (not shown), under spring pressure. When used on a cutting machine fitted with a torch lifting device, the terminals 18, 19, 20 may be connected to this device and the parts 11, 15, 17 may then be omitted.
Patent GB-451493-A (GB)
Title: Improvements in refractory materials and methods of making the same
IPC: C04B35/12
Filed: 1934-11-02
Abstract: The process described in the parent Specification for preparing refractory materials which comprises heat treating chrome ore to effect a redistribution of the gangue component and thereafter the chemical correction of the ore with dead burnt magnesium oxide or periclase is modified in that the step of chemically correcting the ore is omitted, and the heat-treated ore is cooled and ground.  A refractory body is formed from the ground ore without the addition at any stage of a corrective material. It is stated that the heat treatment destroys the original bonding property of the gangue component and converts it into a material having glass-like characteristics.  The heat treatment is preferably conducted in a rotary kiln, and is preferably at or above 3100 DEG  F.  If a tough refractory is desired the chrome ore is cooled slowly after the heat treatment.  An organic binder is added to the cooled and ground product to enable the material to be moulded.  Suitable binders mentioned are prepared starch, goulac or sulphite pitch.  The crude chrome ore which is used for the present invention includes both the raw ore as mined or a material which has been milled or concentrated.
Patent GB-795152-A (GB)
Title: A new or improved rack for supporting towels, ties and other articles of clothing, and the like
Inventor: TOSH JACK
IPC: A47G25/74
Filed: 1955-11-04
Abstract: 795,152. Tie &c. racks. CRAVEN ENGINEERING CO., Ltd. Nov. 1, 1956 [Nov. 4, 1955], No. 31600/55. Class 52(5) A rack for ties, towels &c. comprises spaced bars 2 interconnected to form a grid and having projections 6 on one face separating articles placed on the bars. One side of the grid may have extensions 4 pivoted in socketed mounting brackets 5, a spring being provided to hold the grid in any desired position.
Patent GB-318047-A (GB)
Title: Improvements in or relating to the manufacture of plate glass
IPC: C03B13/02
Filed: 1928-10-31
Abstract: 318,047. Schild, A. Oct. 31, 1928. Discharging.-Relates to a container which is fed continuously with molten glass from a tank furnace and is periodically tilted about a longitudinal axis in order to pour the glass on to a machine for making plate glass. According to the invention, the pouring-lip of the container is normally above the level of the glass in the tank while glass is flowing into the container, so that the flow stops automatically when the glass in the container is at the same level as that in the tank. The container consists of a metal trough 4 having a refractory lining 5 and an insulating layer 6. The trough is journaled on standards 7, 8 so that it may be tilted by means of a lever 13. The glass flows from the tank 1 into the trough 4 through a channel 2 which is coaxial with the bearing 9 on the standard 7. The inner face of the trough is inclined at the part 11, which receives the flow of glass, in order to avoid a free drop and any possibility of the quality of the glass being lowered. A cover 14 extends from the tank over the trough and this may be provided with a gate 12 and ports 19 for gas burners to allow the temperature of the glass to be regulated. In another construction, the cover forms part of the trough and rotates with it, as shown in Fig. 5. While the trough is being filled, the pouring-lip 21 is higher than the level of the glass in the tank. The glass may be poured on to a casting-table 17, Fig. 2, or on to the rolls 30, Fig. 5, of a double roll machine. In this case, the usual teeming-table is not required and the trough is provided with a lip 18, consisting of a hollow member which may be cooled.
Patent GB-1267584-A (GB)
Title: A valve including an expansible ring
IPC: F16K3/14
Filed: 1969-06-24
Abstract: 1,267,584. Valves. CENTRE DE RECHERCHES DE PONT-A-MOUSSON. 24 June, 1969 [10 July, 1968], No. 31759/69. Heading F2V. A pair of wedge gate valve members 9 cooperate to define a trapezoidal recess 11 for a complementary ring 1 whose cross-section diminishes from a maximum opposite wedge A to a minimum at the free ends adjacent the wedge. The wedge engages in a gap in ring 1 and the latter has uniform bending strength such that, upon relative axial movement of the wedge, the ring expands to seat the valve members whilst its inner and outer peripheries retain a circular shape. Upon withdrawal of the wedge, the ring contracts and recess 12 therein ensures positive easement of the valve members. In a rotary ball valve, Fig. 6 (not shown), the seat (19) is urged towards the ball by a split ring (23) which is expanded and contracted by wedge (A) under control by screw (24). The movements of ring (23) are transmitted to the seat by co-operating trapezoidal section ring (21) and Belleville washer (20).
Patent GB-1282182-A (GB)
Title: Improvements in and relating to excess-gas burners
Inventor: MARION HENRI
IPC: E21B43/01
Filed: 1970-06-30
Abstract: 1282182 Pipes COMPAGNIE FRANCAISE DES PETROLES SA 30 June 1970 [10 Oct 1969] 31768/70 Heading F2P [Also in Divisions E1 F4 and G3] A pipe for use in conducting gases from an underwater oil well to a flare stack projecting above the water surface comprises a water permeable casing 1 connected at one end to a hood 2 secured to a mooring and at the other end to an element 32 which interconnects the easing 1 and the flare stack. At each end the casing 1 is folded round a toroid tube 10, the folded portion being covered with a strip of neoprene and clamped against a flange 10a by a section 10b. The casing is preferably made of neoprene, polyester or polyethylene and is held open by metal hoops 8 which are either secured to the casing or to cables 9 as shown. The cables are attached at either end to the hood 2 and element 32 respectively so that any traction between the flare stack and mooring is transmitted by the cables and does not subject the casing 1 to any undue strain.
Patent GB-253008-A (GB)
Title: Improvements in or relating to knife sharpeners
IPC: B24D15/08
Filed: 1925-12-17
Abstract: 253,008. Teitel, J. W. Dec. 17, 1925. V-slot sharpeners. - A sharpener for knives comprises steel sharpening members a of rectangular, oval, or other section mounted upon opposing flat inclined surfaces of a holder b by means of a cover plate e held by a screw l or by means of pressed out portions of the holder and screws or by screws alone. The holder is mounted in a frame c with the upper ends turned over the upper ends of the holder, and the parts are held in position by screws i passing through end cover plates m united by a base n and screwing into tubular portions h of the holder b; a handle d is provided, and the plates m are slotted at o to guide the knife. The steels a are in contact with each other at their narrow side edges; they may be pushed down, turned end for end or reversed as the surface becomes worn. In a modification, the frame c is secured to a base carrying camping-screws, whereby the sharpener may be secured to a bench &c. In another modification, Fig. 11, the steels are held between members b secured together by screws w, and sheet metal guides y for the knife are provided.
Patent GB-160899-A (GB)
Title: Improved "picking" coal cutting machine
IPC: E21C25/20
Filed: 1919-12-20
Abstract: 160,899. Yorkshire Engine Co., Ltd., and Wood, J. W. Dec. 20, 1919. Coal-cutting machines.-A coal-cutting machine comprises a cutter bar actuated by positively-driven cranks, or by one positively-driven crank and one or more guide cranks, the cranks being arranged in the lower chamber of a twopart casing which is divided by a diaphragm and the transmission gearing being arranged in the upper chamber, the diaphragm and the base of the lower chamber having bearings for the cranks. In the machine shown in Fig. 1, a crank-shaft d<1>, driven by a bevel-wheel b combined with a flywheel c, drives the cutter bar f and the motion is controlled by idle guide cranks e. The cranks are enclosed in a casing a', which is rotatable relatively to the casing a containing the gearing whereby the cutter bar is enabled to dig itself into the coal, after which the casings a, a<1> are locked together by pins. Only one guide crank may be provided. The tail f<1> of the cutter bar envelopes the three cranks. In the modified form shown in Figs. 2 and 4, the cutter bar is controlled by two cranks e, e<1>, both positively driven through bevel-gear b and pinions g, h, i, one of the cranks may run idly. The gears run in oil which passes to the cranks through passages m, m<1>, each passage m<1> being normally closed by a ball m<2> which is displaced by centrifugal force when the crank is in motion; packings l prevent the passage of oil into the lower rotatable casing a<1>. The cranks are coupled by a tapering two-part casing n, itself embraced by the forked tail f<1> of the cutter bar which is secured by means of a cap-piece f<2>. The slot a<3>, through which the cutter bar works, is closed by a leather cover o. A distance-piece a<5> spaces the machine body from the coal. A clutch is provided between the motor and cutter bar. As shown in Fig. 4, the cutter bar is adapted for cutting in either direction; a serrated scraper bar for removing debris may be detachably and reversably secured to the cutter bar. The cutter bar may be arranged to yield a, tapered undercut. Two-speed haulage gear, with an interposed slipping clutch, may be provided.
Patent GB-1322364-A (GB)
Title: Pumps
IPC: F04D29/62
Filed: 1970-07-01
Abstract: 1322364 Hinges SIEMENS AG 1 July 1970 [2 July 1969] 32022/70 Heading E2F [Also in Division F1] A cover 2, Fig. 7, of a pump housing may be connected to a base portion 1 by means of a hinge 16 moulded in one piece of plastics material and attached to the cover and base portion by means of studs 17. As shown, the studs may be provided with barbed heads. Instead, heads may be formed on the studs by heating after assembly, or adhesive or casting compound may be used. The hinge 16 may be replaced by a generally U-shaped member 10, Figs. 3 and 4, or a pair of rings (14), Figs. 5 and 6.
Patent GB-619907-A (GB)
Title: Improvements in and relating to continuous feed kinematograph projectors
IPC: G03B41/08
Filed: 1946-10-29
Abstract: 619,907. Kinematograph projectors. KUDAR, J. Oct. 29, 1946. No. 32048. [Class 97 (i)] A continuous feed projector having a rotary compensating polygon 1, with plane parallel refracting faces, has a condenser lens 6 in the form of a cylinder mounted for rotation on its axis, parallel to that of the polygon, the curved surface supporting the film. The end faces of the cylinder are polished. To the end faces are attached discs 9 with sprocket teeth 10 and arranged to be in contact with the end faces at their peripheries. The elongated light source 11 is preferably a mercury vapour lamp mounted at one focus of a reflector 12 in the form of an elliptical cylinder. A reflector of circular cylindrical form may be used. To compensate for the curvature of the condenser, if small, a field lens may be provided with a plane, spherical or cylindrical forward face and a cylindrical rear face parallel to that of the condenser. It may be carried in a frame with rollers which hold the film on the sprocket teeth. The projection lens may be an inverted telephoto lens to give a sufficiently distant back focus with a short focal length.
Patent GB-414935-A (GB)
Title: Improvements in or relating to spring devices particularly for the valves of internal combustion engines
IPC: F01L1/12
Filed: 1933-11-17
Abstract: 414,935. Valves. DELAGE ET CIE, 140, Avenue des Champs ElysÚes, Paris. Nov. 17, 1933, No. 32116. Convention date, Dec. 6, 1932. [Class 7 (vi).] A spring device, particularly for the valves of internal-combustion engines, comprises a rectilinear bar 1 of elastic metal clamped at one end and provided at the other end with an arm 5 by which a torsional stress is applied. The bar may be of nickel-chromium steel, and be secured by an enlarged end 7 clamped by bolts 4, the other end being also enlarged and recessed to receive a fixed trunnion 8. Fig. 4 shows such a spring 1 having its arm 5 engaging an engine valve stem 13, and in order to provide room for a number of such springs of the requisite length, they may be inclined to the longitudinal axis of the engine. An initial torsion may be given to the bar 1 by means of a screw 18 before the bar is clamped. In a modification, the initial tension is imparted by a transverse screw engaging a worm thread on the end of the bar 1. Levers may be arranged between the arms 5 and the valves.
Patent GB-1404172-A (GB)
Title: Semiconductor memory devices
IPC: G11C11/42
Filed: 1972-07-10
Abstract: 1404172 Semi-conductor devices WESTING- HOUSE ELECTRIC CORP 10 July 1972 [4 Aug 1971] 32135/72 Heading H1K [Also in Division H3] A memory array with optical write-in and read-out of information comprises elements consisting of a semi-conductor substrate with a layer of silicon dioxide thereon, a layer of silicon nitride on the oxide and an electrode on the nitride. As described the substrate and electrode are common to all the elements which are defined and mutually isolated by a heavily doped surface grid of the same conductivity type as the substrate, by thickening of the oxide in a grid pattern beneath the nitride or by an earthed or positively biased grid of polycrystalline silicon or aluminium disposed on the nitride layer and insulated from the electrode by silica. As described the substrate is N type silicon, the electrode a transparent cathode sputtered layer of tin oxide or indium oxide and in the element areas the oxide is typically 20  and the nitride 500-700  thick. In operation a sufficient negative bias on the electrode produces a negative charge at the nitride-oxide interface which remains substantially unchanged when the bias is reversed unless the element is illuminated whereupon the stored charge at the interface becomes positive. Since the phase and amplitude of light reflected from the interface is determined by the sign and magnitude of the stored charge this can be read out optically. As described digital information is written-in by light from a laser which is passed through a polarizer and lens scanning system, this system, the energization of the laser and the bias applied to the electrode being simultaneously controlled by the data input system. To read-out the polarized laser beam is scanned over the array and the elliptically polarized reflected light is rendered plane polarized by passage through a #/4 plate and then passed through an analyser to a photo-cell the output of which indicates the state of the stores. Illumination is either via the transparent electrode or through the substrate if it is thin enough and disposed on a transparent base.
Patent GB-397460-A (GB)
Title: Improved process of refining hydrocarbons
IPC: C10G29/06
Filed: 1931-11-19
Abstract: Hydrocarbons are freed from sulphur-containing compounds, colloidal asphaltic bodies and unstable unsaturated substances by treatment with a small amount of dilute sulphuric acid and a salt of a trivalent cation, such as ferric chloride or sulphate. Hydrocarbons specified are petroleum, crude benzol, low temperature tars, shale oil or vapour-phase cracked spirit.  Motor spirit or lubricating oil distillates are refined and finally distilled.  The acid reagent may be regenerated by filtering through sand or asbestos.  Used lubricating oils may be treated similarly and after removal of refining agent, the oil is heated with an adsorbent and decolorizing material and then filtered.
Patent GB-812459-A (GB)
Title: Improvements in or relating to electric control mechanism
IPC: H01H43/24
Filed: 1956-10-22
Abstract: 812,459. Controllers; time switches. BORGWARNER CORPORATION. Oct. 22, 1956 [Oct. 21, 1955], No. 32152/56. Classes 38 (3) and 38 (5). A controller for a washing machine comprises a lead screw 43, a carriage 27 for mounting a number of switch-contacts 33, means for coupling the carriage to the lead screw so that the carriage may be driven by a pilot motor along a straight path, and a rod 42 which is rotated to actuate the coupling means and to position a series of the switch-contacts for sequential actuation when the carriage is driven by the pilot motor. A block 32 carries a plurality of the normally open contacts 33 and is pivotally mounted to the member 27, one contact of each pair being formed with a projecting camfollower 34 which is engageable with a corresponding cam 22. Spring contacts 36 engage bus-bars 23 to supply, current to the contacts 33. Rotation of the rod 42 in one direction causes the block 32 to follow a cam 49 so that the block is pivoted away from panel 21 and the cam followers become disengaged from the associated cam surfaces. Correspondingly, rotation of the operating rod in the opposite direction causes the cam followers 34 to engage the cams 22. When the operating rod reaches its extreme position in this direction of rotation, a flat face of cam 51 is presented to slide 56 and the spring 57 drives the slide downwardly permitting claw 61 to engage the lead screw. The controller is then in a condition to be driven by the pilot motor. Actuation of the rod 42 to its other extreme position allows the carriage to be moved freely along the lead screw so that a normal or short working cycle may be selected, or any desired working function within those cycles. The short working cycle is composed generally of the same machine functions as the normal cycle, but those of the short cycle are each of lesser duration as determined by suitable contouring of the cams 22. An indicator card denotes the two distinct washing cycles, and a leaf spring affords a slight resistance to motion of the carriage when it is manually adjusted from the positions corresponding to the normal cycle to those of the short cycle. Specification 710,541 is referred to.