baber/WOPTO huggingface dataset:
Patent GB-510834-A (GB)
Title: Improvements in and relating to oven doors
IPC: F24C15/04
Filed: 1938-10-11
Abstract: 510,834. Inspection-windows for stoves. PAUL, M. Oct. 11, 1938, No. 29439. [Class 28 (i)] [Also in Group XI] An oven door comprises transparent panels 9, spaced by a frame 10 and held in position by frames 1, 3, clamped together by bolts 12 screwed into lugs 11 on the frame 1. The frames 1, 3, have opposed, outwardly flared flanges 2, 4, the flange 2 being arranged to make contact with the oven frame when the door is closed. The flange 4 is received within the flange 2 and abuts against a gasket 5. Channelled or other gaskets may be provided on the edges of the panels 9. A lamp 15, for illuminating the oven, may be secured at one corner of the frame 3, the bulb being enclosed and protected by a removable globe 16. The oven may have a light-reflecting lining, e.g., of white metal or porcelain. The door may be hinged to the oven frame in any manner, but as shown, pintles 13 are provided at the lower edge and a handle 17 at the top.
Patent GB-695034-A (GB)
Title: Improved method and apparatus for treating grass and the like for the preparation ofmeal and other feed stuffs
Inventor: CHRISTY FRANK FELL
IPC: A23N17/00
Filed: 1950-12-01
Abstract: 695,034. Treating fodder; thrashing-machines. CHRISTY & NORRIS, Ltd. Nov. 30, 1951 [Dec. 1, 1950], No. 29475/50. Classes 5(ii) and 58 [Also in Group II] In apparatus for treating grass, fodder, cereals, root-crop tops and the like, the material is fed in at 11 to a housing 1 provided with rotary beaters 25, the coarser fibre-like material being extracted from the housing by means of fan-like beaters 35 provided in a drum 4 secured to the housing, the material treated in the housing and drum being withdrawn through screens 6, 42 by means of a conduit 14 communicating with a suction fan 17 which delivers the material to a discharge outlet 18. The screen 42 may be omitted. The coarser material is extracted from the housing through openings 34 in an end wall 5 thereof and through an opening 41 in an inner wall 40 of the drum. The effective area of the openings 34 is adjustable by means of a manually-operable apertured disc 35. The extraction effort of the beaters 35<SP>1</SP> can be varied by providing in the outer wall of the drum an opening 49 the effective area bf which is adjusted by means of a shutter 50 which can be raised or lowered by rotating a nut 51 about a feed screw 52. The beaters 25 are pivoted to rods 26 passing through spacing discs 27 located by spacing collars 28. The beaters 35<SP>1</SP> are carried on pins 34<SP>1</SP> passing through discs 33 located by means of spacing members 32.
Patent GB-661957-A (GB)
Title: Improvements relating to amplitude modulated radio transmitters
IPC: H03C1/06
Filed: 1948-11-12
Abstract: 661,957. Modulating apparatus; valve amplifying circuits. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Nov. 12, 1948 [Nov. 17, 1947], No. 29476/48. Classes 40 (v) and 40 (vi). The final low-frequency amplifier of a radio transmitter is coupled to the modulator through a circuit arranged to filter off unwanted harmonics of the audio signals to an auxiliary loading resistor, and to present a substantially constant impedance to the amplifier over the useful audio frequency range. As shown, the final L.F. amplifier 3 is coupled to the modulator and R.F. stages of a transmitter by a circuit comprising a shunt capacitor 9 in series with a resistor 10 and a series inductor 8. The values R, L and C of the resistor 10, inductor 8 and capacitor 9 are chosen so that R = #C/C, and R is substantially equal to the input resistance of the modulator 7. This ensures that a constant impedance is presented to the output of the amplifier, while unwanted harmonics are dissipated in the resistor 10. Part of the modulated output of the transmitter is rectified at 11 to give an overall feed-back, which is combined at 13 with unwanted harmonics taken from a tap 12 on the resistor 10 and fed through an amplifier 15 to the input of the low-frequency amplifier.
Patent GB-897643-A (GB)
Title: Polyolefine mixtures and shaped structures prepared therefrom
IPC: C08L23/12
Filed: 1959-08-28
Abstract: A composition of macromolecular substances comprises a mixture of polypropylene with a copolymer of ethylene and propylene, the polypropylene and the copolymer both being prepared with the aid of a catalyst formed by contacting a halide of a metal of Group IVa, Va or VIa of the Mendeleeff Periodic Table with a metal of Group Ia or II or aluminium, or with an alloy, organometallic compound or hydride of said metals of Group Ia or II or aluminium, or with a complex hydride or complex organometallic compound of boron and a metal of Group Ia or II, the choice of catalyst and polymerization conditions being such that at least a part of the metal of Group IVa, Va or VIa is present in the catalyst in a valency state lower than the maximum, the copolymer containing 3 to 20% by weight of propylene.  The mixture preferably contains 10 to 70% of the copolymer, and the compositions may comprise stabilizers such as 4,41-thio bis[(6-tertiary butyl)-meta-cresol] or N-stearoyl-para-aminophenol. The preparation of a catalyst from titanium tetrachloride, ethyl aluminium sesquichloride and triethyl aluminium is described.  The molecular weight of the polymers may be adjusted by the addition of hydrogen during polymerization, and the polymerization may be terminated by the addition of n-butanol and the product washed with water and freed from diluent by steam distillation.  The compositions of the invention may be formed into bottles, foils and tubes. Specifications 810,023 and 810,024 are referred to.
Patent GB-1276901-A (GB)
Title: A method of producing electrical contact elements
IPC: H01H1/023
Filed: 1969-06-11
Abstract: 1276901 Making electrical contacts; welding by pressure CHUGAI ELECTRIC INDUSTRIAL CO Ltd 11 June, 1969 [21 June, 1968; 2 Aug 1968] 29522/69 Headings B3A and B3R. In making an electrical contact element a metal member is contacted by a ductile contact metal, pressure is applied to cold deform the contact metal and partially reduce its thickness by at least 20% to bring the member and contact metal into intimate contact and the deformed contact metal is heated while under the applied pressure to a temperature above its recrystallization temperature but below its melting point to effect metallurgical bonding of the member and contact metal. The contact metal may be silver, platinum, gold, palladium or alloys based on these metals and the substrate metal may be iron, mild steel, low carbon steel, spring steel, stainless steel, copper and copper base alloys, e.g. copper-zinc, beryllium copper, copper-phosphorus, silver, silver base copper alloys, silver base alloys, aluminium, aluminium base alloys, nickel, or nickel silver. In one embodiment contact metal 1, Fig. 1, having a high cold bonding tendency, is placed on a substrate 2 of relatively poor cold bonding tendency and with the substrate supported on a water cooled die 5, a high-speed steel or cemented tungsten carbide punch 3 having a cavity 3A of a volume no greater than that of the metal 1 but of lesser height is brought down to deform the metal 1, e.g. to 50% reduction in height. When the increase in hardness due to the applied pressure resists further deformation a high current pulse, e.g. lasting for 200 millisecs. is applied across the punch and die to heat the contact metal above its recrystallization temperature but below its melting point when it flows still further and fills the cavity 3A completely. The contact metal 1 is then metallurgically bonded to the substrate 2. After the initial deformation the surfaces may be as close as four Angstrom units and cold pressure welding may occur. In one example the contact metal is silver and the substrate nickel silver, and in another silver-dispersed cadmium oxide and stainless steel. In another embodiment a piece 1, Fig. 6, of ductile contact metal wire with a freshly cut end face 1<SP>1</SP> is superposed on the freshly cut face 2<SP>1</SP> of a piece 2 of different ductile metal wire. The piece of wire 1 may be of silver, gold, platinum or alloys based on these metals or silver-cadmium oxide and the piece of wire 2 may be of silver, nickel, aluminium, iron or copper. The piece of wire 2 is mounted in a die 5 backed by a pin 4 and a punch 3 having a cavity 3A is lowered to deform the pieces 1, 2, a high current being immediately applied across the punch and die to heat both metals above their recrystallization temperature 1 when the pieces flow to fill the cavity 2A completely and form a rivet contact.
Patent GB-819576-A (GB)
Title: Electron focusing structure
IPC: H01J29/80
Filed: 1955-10-18
Abstract: 819,576. Colour television tubes. CHROMATIC TELEVISION LABORATORIES Inc. Oct. 18, 1955 [Oct. 22, 1954], No. 29636/55. Class 39(1). Colour control grids comprise cylindrical lens arrangement made up of two or more sets of linear conductors, the sets being disposed perpendicularly one to the other. In the arrangement of Fig. 3, a grid 21 of metal tapes or wires running parallel to the colour phosphor strips 15 is flanked by electron permeable electrodes 23, 25 which may be tightly stretched parallel fine wires. The grid 21 is preferably of metal tape when a single beam is used, but of wire for three gun control. The conductive layer 17 covering the phosphor strips is at a high positive potential, the two permeable electrodes 23, 25 at positive potentials and the grid 21 at a negative potential. The conductors of electrode 23, may be staggered relatively to those of electrode 25 and the spacing of the conductors 25 greater at the side of the tube than that of the conductor 23 in order to correct aberration. The spacing of the phosphor groups conforms to that of the grid conductors away from the centre of the screen, Figs. 6, 7A and 7B (not shown). In Fig. 4 a positive electrode 37 of fine wire 37 lies between two sets of linear conductors 33, 35 at negative potential running parallel to the phosphor strips and simulating a double convex lens or two plano-convex lenses back to back. In another alternative, a single permeable electrode at positive potential lies on the side of the grid of linear conductors remote from the phosphor screen, Fig. 5 (not shown). Screens comprising three aligned grids of conductors which produce electron optical effects similar to the lenses of the present invention are also disclosed, Figs. 8, 9 and 10 (not shown). The specification discusses the focusing actions and the spacings and aberrations of the various arrangements described. Specification 757,071 is referred to.
Patent GB-838238-A (GB)
Title: Improvements in or relating to voltage responsive relay circuit arrangements
IPC: H02H3/20
Filed: 1957-09-20
Abstract: 838,238. Protective arrangements. SIEMENS & HALSKE A.G. Sept. 20, 1957 [Sept. 27, 1956], No. 29707/57. Class 38 (5). [Also in Groups XXXV and XL (c)] An over-voltage or under-voltage protective relay circuit comprises an electromagnetic relay connected in series with an inversely connected crystal rectifier, the arrangement being such that the relay operates when the voltage across the rectifier reaches the Zener value. In the Figure the relay R is connected in series with a silicon Zener diode K across one arm of a potentiometer W1, W2, W3 connected to the voltage source. The potentiometer reduces the voltage to that required for the Zener diode and a selenium Se rectifier is connected in parallel with arm W2 to provide temperature compensation for the Zener diode. The relay may be provided with a contact for resetting the voltage applied to the circuit or for operating a signalling device and may be biased by means of a permanent premagnetization or by a current flowing through a separate winding so that a smaller current through the Zener diode will operate the relay.
Patent GB-360149-A (GB)
Title: Improvements in concrete mixers and agitators
IPC: B28C5/20
Filed: 1930-10-04
Abstract: 360,149. Mixing-machines. BALL, C. F., 736, Park Street, Milwaukee, Wisconsin, U.S.A. Oct. 4, 1930, No. 29747. [Class 86.] A concrete mixer, which may be mounted on a truck, comprises a drum having at one end a discharge door, the other conical end being closed, and mixing blades whereby on the rotation of the drum in one direction the materials are moved towards the closed end by the blades and drop down the sloping surface of the drum, while rotation in the opposite direction lifts the material on to a discharge shoot projected through the opening. The drum 14, mounted on rollers 15, 16, may be charged with dry materials through the discharge door 25, or a separate charging aperture 30 may be provided, and water is supplied through a pipe 18 in the closed conical part of the drum. The helical blades 32 are fitted with filling members 50 where they join the other end of the drum, and the material is discharged by means of a pivoted shoot 26.
Patent GB-710144-A (GB)
Title: Improvements in or relating to the coking and catalytic cracking of hydrocarbons
IPC: C10B55/10
Filed: 1951-12-19
Abstract: <PICT:0710144/III/1> A hydrocarbon feed stock is fed to a coking zone in which a dense fluid bed of inert particles is maintained, vapours from the coking zone are passed either direct or after fractionation to a fluidized catalyst cracking zone from which catalyst is continuously withdrawn to a regenerator, and regenerated catalyst and coking zone inert particles are brought into indirect heat exchange association so that the heat required for the coking zone is supplied by the regenerated catalyst.  In the apparatus of Fig. 1, coke particles in reactor 3 are maintained as a dense fluidized bed by steam injected at 6 and hydrocarbon feed stock is supplied to the bed at 1.  Coke is continuously withdrawn at 171 and vapours pass via cyclones 29 to a fluidized catalyst bed 20 above the coking zone and contained in a reactor 19 of larger diameter.  Catalyst is continuously withdrawn from the bed at 15 and fed by an air lift 16 to regenerator 30.  From the regenerator catalyst returns to the cracking reactor 19.  A catalyst circulation is also maintained by lines 37, 14 and 16 between the regenerator and a shell and tube heat exchanger 8 in the coking reactor 3.  The catalyst is maintained in a fluidized state in the shell of the heat exchanger by steam introduced at 10 while the fluid coking bed extends through the tubes 11 of the heat exchanger.  Excess heat in the regenerator may be removed by coil 36.  The heat-exchanger may alternatively be arranged in the catalyst regenerator.  In another arrangement the cracking reactor is separate from the coking reactor so that vapours from the coking zone may be fractionated and a gas oil fraction only passed to the cracking reactor; Fig. 2, (not shown).  When the cracking and coking reactors are separate with the heat exchanger in the coking bed, cooled regenerated catalyst from the heat exchanger may be mixed with the gas oil fraction and passed to the cracking reactor, any excess catalyst from the heat exchanger being returned to the regenerator.  The feed may be preheated and may be cut back with naphtha and diluted in the reaction zones with steam, recycle gas or other inert gas to increase gas velocity. Coking and cracking temperatures range from 800 to 1200 DEG F. and regeneration temperatures from 1000 to 1500 DEG F.  The heat exchangers may be only part submerged in the coking of regenerator bed.  The feed may be injected into either the dense or disperse phase of the coking reactor.
Patent GB-831090-A (GB)
Title: Improvements in or relating to free piston engine gas compressors
IPC: F02C5/08
Filed: 1956-10-01
Abstract: 831,090. Free piston compressors. BURION, E. P. Oct. 1, 1956 [Oct. 6, 1955], No. 29899/56. Class 7(2) The gases delivered and compressed during the first compression stroke of the machine are discharged into a space of restricted volume 18. The spring 28 is chosen so that the valve 24 is kept closed during the first compression stroke. During the following compression strokes the pressure inside the space 18 increases and the valve 24 is opened. As the pressure in the space 18 increases the return power applied to the compressor piston increases. The compression rate in the accumulator cylinder 16 is normally lower than that in the compression cylinder 6 but the space 17 being completely closed owing to the pressure of valve 41 during the first stroke in the direction of the arrow f, the pressure inside the space 17 is greater than that prevailing in the cylinder 6 when the moving parts reach the outer dead centre. The injection pump 14 and a needle valve 35 are conjointly controlled by a regulator 33 connected to the compressed air reservoir 20. Air losses in the accumulator space 17 are made up by air supplied through a valve 41 when the pistons are at their inner dead centre position. With increase in delivery after starting the quantity of fuel injected increases and simultaneously the needle valve 35 is opened more. Owing to this the pressure in the accumulator space 17 also increases. A cock 48 is provided for releasing the pressure in the space 18.
Patent GB-654759-A (GB)
Title: Improvements in and relating to mechanical scanning devices for picture telegraphy and like purposes
IPC: H04N1/16
Filed: 1948-11-17
Abstract: 654,759. Copying-telegraphy; photo-electric control systems. BRITISH TELECOMMUNICATIONS RESEARCH, Ltd., and BELL, D.A. Nov. 17, 1948, No. 29904. [Class 40 (iii)] A mechanical scanning-device comprises a hollow cylinder provided with a helical slit and mounted for rotation about its geometrical axis a mark having a straight slit and a lens system being disposed inside the cylinder and the arrangement being such that the slit and a narrow straight zone at the outer surface of the cylinder and parallel to the axis thereof lie in conjugate focal planes of the lens system. Figs. 1 and 2 (Provisional) show the general arrangement in which the device which is arranged to scan a page of a book 10 (or other object such as a flat picture of unlimited dimensions and formed on inflexible material), comprises a hollow cylinder 1 mounted for rotation about a spindle 3 and provided with a helical slit 2, a small area of which is illuminated by means of an arrangement comprising a light source 4 fixedly located with respect to a stationary mark 5, an image of a slot 6-6<SP>1</SP> in which is projected by means of a lens 7 (which forms an enlarged image 8-8<SP>1</SP> and a cylindrical lens 9 to form an image at the inner surface of the drum. Light reflected from the object being scanned operates a photo-electric cell 13 on to which it may be focused directly by a suitable optical system (not shown), or, alternately, the sides of the compartment formed by the screens 11 and 12, which screen the cell 13 from direct illumination, and a fixed lining 17 may be painted white to provide an efficient reflecting surface. Synchronizing signals are generated by positioning outside the compartment containing the source 4 an opaque sheet 16 provided with a number of equallyspaced apertures so that, as the cylinder rotates, light falling on a photo-electric cell 15 is interrupted at a rate dependent upon the speed of rotation of the cylinder. A scanning component at right angles to that produced by rotation of the cylinder may be produced by moving the object scanned continuously or stepby-step by any suitable means (not shown) in the required direction. An arrangement suitable for use in generating picture signals representing the picture formed on the screen of a cathode-ray tube and in which the light source 4 of Fig. 1 is replaced by a photo-electric cell and the photo-electric cell 13 by a light source for the generation of synchronizing signals, the second component of scanning being provided by moving the whole scanning device in the required direction, is described with reference to Fig. 3 (Complete) (not shown). In both of the described embodiments the helical slit should have a tapered cross-sectional shape the width of the narrower end, which is adjacent the object being scanned, being of the order of <SP>1</SP>/ 1000 th inch, the angle of taper being dependent on the aperture of the lens 9 (Fig. 4, Complete, not shown).
Patent GB-153787-A (GB)
Title: Improvements relating to electric switches
IPC: H01H50/32
Filed: 1919-12-01
Abstract: 153,787. Calvete, I. Dec. 1, 1919. Electro-magnetic switches.-An electro-magnetic switch which can be operated by a local circuit from any point and controls lamps or small motors comprises a solenoid 1 having a core furnished with pole-pieces 2, 3 and a tilting armature 4 in unstable equilibrium pivoted at its lowest point 5 so as to move between the polepieces when the solenoid is energized. The movement of the armature is limited by a pin 10 thereon engaging with a slot 9 in a non-magnetic plate 8 secured to the pole-piece 3. The plate is formed at its top edge with a recess 22 in which a loose pawl 20 on the armature may engage. On depression of one of the control push-buttons, the local circuit through the solenoid is completed, and the armature, together with the arm 12 carrying fork contacts, is drawn to the axis of the solenoid and by inertia passes beyond this position. It is prevented from returning to the axial line by the pawl 20. When, however, the solenoid circuit is broken by releasing the press-button, the armature falls so that the prongs bridge the mercury contacts 14. On again depressing and releasing a button, the armature is restored to its original position.
Patent GB-310835-A (GB)
Title: Improvements in or relating to timepieces
IPC: G04B37/04
Filed: 1928-10-17
Abstract: 310,835. Meyer, G. May 1, 1928, [Convention date]. Cases, watch.-A watch 4 occupies the upper half of a flattened tube 2 having a finger grip 7 attached to its lower end by a pin 6. This pin 6 moves along a slot 5 in the outer case 1, a spring 9 holding the case 2 in its extended or closed position.
Patent GB-1189903-A (GB)
Title: An Article Selection Method and Label-Dispensing Device Used in Said Method
Inventor: FURRER JOHN RUDOLPH
IPC: B65C11/00
Filed: 1967-06-29
Abstract: 1,189,903. Label dispensers; warehouse arrangements. F.M.C. CORP. 29 June, 1967 [10 Aug., 1966], No. 30070/67. Headings A4G and A4T. For speeding the collection of items from store, an operator carries a roll dispenser 10, Fig. 2, for a backing strip 16 carrying labels 15 the indicia on which can be viewed via lens 21 as the strip passes over guide 26, the labels being dispensed at 40 when the backing strip is pulled through its opening 30 at right angles to the guide. The indicia read through the lens directs the operator to the correct part of the store, and after selecting a quantity of an item as indicated on the label, the label is dispensed and attached to the quantity, the next label coming beneath the lens and indicating the sequential item to be selected. The labels may have "automatic read" symbols whereby, after selection, the items are placed on a conveyer, the symbols detected and the items distributed accordingly.