baber/WOPTO huggingface dataset:
Patent GB-642932-A (GB)
Title: Improvements in and relating to frequency control systems for magnetron oscillators
IPC: H03L7/04
Filed: 1948-03-12
Abstract: 642,932. Automatic frequency control systems. BRITISH THOMSON-HOUSTON CO., Ltd. March 12, 1948, No. 7591. Convention date, March 15, 1947. [Class 38 (iv)] [Also in Group XL (c)] In a system in which the frequency of a highfrequency oscillator is regulated by comparison with a source of reference oscillations, the oscillator comprises a magnetron having, within a common envelope, a first anode-electrode means to maintain the oscillations, and a second anode electrode means acting as it variable reactance for controlling the frequency. In the Figure, the magnetron oscillator 1 includes an oscillator section comprising anodes 2, 3 and 4 and cathode 11 which maintains oscillations in the tuned transmission line circuit 5, which is tuned by conductor 8. In addition, as described in Specification 642,931, [Group XL (a)], a variable reactance portion is .provided in a chamber between anodes 2 and 3 and around cathode 13, which controls the frequency of the oscillator section in response to the voltage between the anodes 2 and 3 and cathode 13. The generated oscillations are picked up by loop circuit 18 and applied to a frequency mixer 20 together with oscillations from a controlled oscillator 25, the difference frequency being applied to a limiter and discriminator 21. The output from 21 is a direct voltage proportional to the frequency difference, which after amplification in unit 22 is applied to cathode 13 in series with the normal supply, so that the frequency . of the magnetron oscillations is maintained fixed relative to the frequency of oscillator 25. Oscillator 25 may be controlled in frequency, by applying the output from oscillator 25 together with that from a crystalcontrolled oscillator 26 to a mixer circuit 27, the difference frequency being applied to limiter and discriminator. The resulting controlling voltage is then passed through a time constant network to modulator 30 which is also fed with modulation signals from microphone 31, the resulting output being used to modulate oscillator 25. The output from oscillator 25 is then frequency-modulated according to the microphone signals, while the mean frequency is stabilized relative to oscillator 26. The time constant network prevents automatic correction of the frequency variations due to the modulation signal. The output from magnetron 1 is similarly frequencymodulated and controlled to correspond with the variations in the output from oscillator 25. Alternatively, the output from the magnetron oscillator may be amplitude-modulated by means of modulator 24, while oscillator 25 is then stabilized so that the magnetron frequency is also maintained constant.
Patent GB-512829-A (GB)
Title: Improved keyboard for pianofortes and other instruments with similar keyboards
IPC: G10C3/28
Filed: 1938-03-16
Abstract: 512,829. Pianoforte &c. keyboards. BEAVER, W. G. March 16, 1938, No. 7643/37. [Class 88 (ii)] A transposing keyboard for pianofortes &c. comprises a stationary frame 1, 1a, a frame 2 slidable laterally thereon, a frame 22 carrying the keys 23 and movable vertically on frame 2, and a frame 8, 9, 6 movable backwards and forwards in frame 2. The keys are first disconnected from the action by drawing out knob 13a which through a block 11 withdraws the wedge-bars 8, 9 from underneath the members 22b, 26 of the frame 22 allowing the keys to fall. Simultaneously the inner end of the rod 13 is withdrawn from an apertured plate 33, and a pin 13b from a comb 21, so that frame 2 carrying the other frames may be moved laterally by rotating the knob 16a of a drum 15 wound with a cable 19, the ends of which are attached to frame 2. On pushing in the knob 13a, the keys are re-engaged with the action by the wedges 8, 9, and the frame 2 is centred and locked in its new position by interengagement of the pin 13b with the comb 21, and the pin 13 with the plate 33. An indicator 29 is attached to the rail 26. The pin 13 may be replaced by a hand or foot lever, pivotal link, or rack and pinion.
Patent GB-115516-A (GB)
Title: Improvements in Rectifying Interrupters for X-ray Purposes.
Inventor: DEAN ALFRED ERNEST
IPC: H02M1/20
Filed: 1917-05-30
Abstract: 115,516. Dean, A. E. May 30, 1917. Commutator switching-arrangements. - In a rectifier for X-ray purposes, the high-tension contacts are carried by insulators on a cross-bar which can be rotated round the central revolving shaft, and fixed in any position in order to collect the desired impulses. The rectifying-apparatus is attached to the interrupter by three columns a supporting a stage b which carries a bearing for the insulating-shaft c. The rectifying-switch arms c<2>, are fixed in a ball c<3> adjustably secured to the shaft c by a bolt and nut c<4>. The contacts f<1> are carried by insulators f mounted on a cross-bar e<1> attached to a sleeve e outside the bearing. The position of the sleeve e and contacts f<1> may be adjusted and fixed by a set-screw with an insulating-handle e<2>. A disk g, preferably rotating with the shaft c, is arranged to prevent dust from accumulating on the cross-bar e'.
Patent GB-526271-A (GB)
Title: Improvements relating to internal combustion engines using solid pulverulent fuel
IPC: F02B45/02
Filed: 1939-03-11
Abstract: 526,271. Powdered fuel engines. SCHICHAU GES., F. March 11, 1939, No. 7896. Convention date, March 11, 1938. [Class 7 (ii)] Sludge which passes the piston rings is collected within a chamber between the cylinder and the crank case and is removed therefrom by a gas or vapour. In the engine shown, air is drawn into the chamber 2 through non-return valves 13 by the engine piston and forced out with sludge through a pipe 15. The walls of the chamber are curved so that sludge can flow easily and stuffing boxes 9, 10 round the piston rod prevent sludge entering the crank case. The lubricating oil may be evaporated from the sludge before discharge by supplying exhaust gases to a casing 8<1> below the chamber 2. The discharge pipe may be jacketed and supplied with exhaust gases for heating the sludge. Steam, cooling water or electrical heating may be used as alternatives. A valve which opens only after a certain pressure is obtained in the chamber may be fixed in the exhaust pipe. There may be additional means for pumping gas or vapour through the casing. If preferred, exhaust gases may be used to remove the sludge which may be discharged directly into the exhaust pipe by an injector. A fire extinguishing medium may be applied to the sludge to prevent damage by fire. The discharge pipe may house a separator for oil and dust and the sludge may be burnt in the discharge pipe so as to produce a draught which assists the discharge action.
Patent GB-1147041-A (GB)
Title: Alloy benefication
IPC: C22B21/00
Filed: 1966-02-23
Abstract: 1,147,041. Treating A1-Si alloys. REYNOLDS METALS CO. Feb. 23, 1966 [ Feb. 26, 1965], No.8006/66. Heading C7D. Molten Al-Si alloy containing at least 50% Al, at least 50% Si, up to 15% Fe and up to 10% Ti is cooled in a quiescent state until a coherent skeletal solid phase higher in Si content and a liquid phase lower in Si content are formed, the volume ratio of solid to liquid phase being no less than 1:10; the solid and liquid phases are then separated. The molten metal may be cooled and the separation effected in the centrifuge described in Specifications 1,147,042 and 1,147,043. Prior to treatment non-metallic impurities may be removed from the alloy by settling, high temperature centrifuging or filtration. During the crystallisation of the solid phase the temperature drop should not exceed 50F. /minute at temperatures below 1800 F.
Patent GB-589759-A (GB)
Title: Improvements in or relating to plastic material in form suitable for use for packing or sealing purposes or methods of making same
IPC: B29C48/08
Filed: 1945-03-31
Abstract: 589,759. Joint-making packing ; stuffing-boxes. B.B. CHEMICAL CO., Ltd., and STUART, T. March 31, 1945, No. 8150. [Classes 122 (iii) and 122 (v)] A method of making a material in string-like, tape-like or other extenuated form comprises forming a flexible semi-permeable sleeve around a plastic composition, and applying further plastic composition over the outer surface of the sleeve. The sleeved composition is passed through a die 1 having an aperture of slightly larger diameter which is surrounded with a supply of further plastic composition 16 (which may be the same or different). This is taken up by the sleeve as a superficial layer as it passes through the aperture. The die is heated to 100-200 C. and the composition in it to about 80 C. The coated product is passed through a second die (not shown) kept free of composition and having the same or slightly less diameter than that of the coated product. A suitable composition is that specified in Specification 572,676. [Group V]. Specification 572,683 also is referred to.
Patent GB-1535570-A (GB)
Title: Camera tube target including a shottky barrier
IPC: H01J29/45
Filed: 1976-03-02
Abstract: 1535570 Camera tube target RCA CORPORATION 2 March 1976 [14 March 1975] 08316/76 Headings H1K and H1D In a target 10 for a camera tube, a layer 20 of insulating material containing metal particles dispersed therethrough, forms a Schottky contaet at a major surface 16 of a photo-conductive semi-conductor body 12, the Schottky barrier height exceeding about 0À9 eV., the resistivity and the sheet resistivity of the layer 20 being respectively less than 5 Î 10<SP>10</SP> ohm-cm. and more than 10<SP>13</SP> ohms per square, and thickness of the semi-conductor body being more than 2 microns. Typically, the layer 20 consists of a sputtered layer of Au-SiO 2  cermet having a thickness exceeding 100 Š, the metal particles of size 25 Š and a particulate concentration between 8 and 13% by volume of the layer. A semiconductor material, e.g. CdSe, having a bandgap between 1À4 eV. and 1À8 eV. is used when response over the entire visible spectrum is desired. For a response over a restricted range, however, a semi-conductor material, e.g. GaP, CdS or an alloy of GaP-GaAs having a bandgap in excess of 1À8 eV. is used. The surface 16 prior to the formation of the layer 12 may be lightly oxidized, or overlaid with a layer of copper so that in formation of the layer 12 the desired Schottky barrier height is achieved. A transparent conductive layer 18 of a metal or till oxide is provided on the other major surface 14. It is stated that the target provides low charge current of the order of 10<SP>-9</SP> amp./cm.<SP>2</SP>.
Patent GB-720849-A (GB)
Title: Improved refrigerator
IPC: F25D21/06
Filed: 1953-03-26
Abstract: 720,849. Refrigerating. GENERAL MOTORS CORPORATION. March 26, 1953 [April 17, 1952], No. 8350/53. Class 29. In a refrigerator having a freezer compartment 14 with an evaporator 24 and a storage compartment 16 with an evaporator 30 the refrigerant from the compressor-condensor unit 40, 44, 46 flows first through one section 32 of the storage evaporator 30, then through the freezer evaporator 24, and then through another section 34 of the storage evaporator before returning in gaseous form to the compressor 40. The storage evaporator comprises a relatively small plate 30 with two separate refrigerant conduits or passages 32, 34. The liquid refrigerant from the condenser 44 and receiver 46 flows through a line 48 in heat exchange with the suction line 58 to the passage 32. During normal working gas flowing in the suction line removes a large part of the sensible heat of the liquid refrigerant, but when the compressor stops and flow of gas in the suction line ceases all the heat of the liquid refrigerant which continues to flow through the passages 48, 32, 50 during the early part of the of period is available to defrost the storage evaporator. The conduit 48 and passage 32 and a conduit 50 leading therefrom to the freeze evaporator 24 may act as restrictors to reduce the pressure of the refrigerant before discharging it to the freeze evaporator. The amount of refrigerant supplied to the freezer evaporator is in excess of that required for maintaining the desired temperature in the freezing compartment 14 so that some overflows through a line 52 to the passage 34 of the storage evaporator and effects refrigeration of the storage compartment 16. From the passage 34 the refrigerant passes by line 54 into a receiver 56 in thermal relationship with the freezer compartment liner 26 and connected by the suction line 58 to the compressor. Liquid refrigerant stored in this receiver cools the freezer compartment during the off periods.
Patent GB-1432869-A (GB)
Title: Scintillation camera with linearity
IPC: G01T1/164
Filed: 1974-02-25
Abstract: 1432869 Scintillation camera G D SEARLE & CO 25 Feb 1974 [23 Feb 1973] 8368/74 Heading H4F In an Anger-type scintillation camera to correct the inherent characteristic non-linear spatial response which results in a denser clustering of the display dots corresponding to gamma rays received in the central areas of central ones of the photomultipliers (e.g. the central 7 of the standard 19 photomultipliers) the light pipe 312 mounted between photomultipliers, PM and the glass cover 311 on the single crystal scintillator 310 is provided with cones 509-511 of transparent material having the same index of refraction as the light pipe under the central ones of the photomultipliers to alter the distribution of light from gamma ray interactions to thereby correct the above non-linear response, these cones being coated on at least a portion of their surfaces with a transparent material having an index of refraction lower than that of the light pipe to thereby partly or totally reflect or transmit light from the scintillation crystal. Specifically the light pipe and cones comprise ultraviolet transmitting acrylic plastics material and the coating Na 5 Al 3 F 14 .
Patent GB-733072-A (GB)
Title: Improvements in or relating to electric lamps
Inventor: JR DEXTER PARSHALL COOPER
IPC: H01K1/14
Filed: 1952-04-02
Abstract: 733,072. Electric incandescent lamps. INTERNATIONAL POLAROID CORPORATION. April 2, 1952, No. 8379/52. Class 39 (2). An electric lamp comprises a ribbon filament 16 mounted substantially at the focus of a metallic reflecting surface 12 provided on a substantially paraboloidal portion 10 of a hermetically sealed envelope, the long axis of the filament being disposed substantially perpendicular to the axis of the reflecting surface and the broad dimension of the filament substantially within the plane defined by the said axes. The filament may be flat, or corrugated as shown in Figs. 3 and 4, and is preferably crimped or corrugated at right-angles to its longitudinal axis, with the distance between adjacent peaks 32 less than the width of the filament and also less than the depth of the corrugations. Alternatively, the corrugations may be formed longitudinally of the filament. The parts 50 of the filament adjacent to the leading-in wires are reduced abruptly in crosssectional area in order to offset the cooling effect of the junctions with the wires. The lamp may be of the sealed-beam type for use as a vehicle headlamp, and the filament may be made of tantalum carbide disposed within an atmosphere comprising a volatile hydrocarbon and an excess of free hydrogen, as described in Specification 716,642. The filament is applicable to lamps producing infra-red or other non- visible radiation.
Patent GB-1464600-A (GB)
Title: Film cartridge
Inventor: MILLER STEPHEN HENRY
IPC: G03B31/00
Filed: 1974-02-25
Abstract: 1464600 Film cartridges EASTMAN KODAK CO 25 Feb 1974 [26 Feb l9 8477/74 Heading B8M  Restrictive "clockspringing" or radial displacement and consequent "stepping" of the convolutions of an unsecured, coreless supply roll 20 of film in a cartridge 10 are controlled or prevented by (a) bowing a flexible wall 30 of a chamber 22 housing the roll so as to expand the chamber and, optionally, (b) locking the inner convolution to a ring 80 and latching the ring to a slider 60 which in a first position secures the ring and when moved to a second position (to effect the chamber expansion) releases it for rotation. The movement of the slider may be automatically effected as the cartridge is loaded into a camera 40 which in operation exposes a photographic emulsion covered portion of a moving film F to scene light passing through aperture 34 and simultaneously sound records on a magnetic stripe 12 as the film passes through an aperture 32 and into a take-up chamber 36. As the cartridge is pressed into a chamber 42 it is urged by spring 54 so that a locating pin 44 is received in a notch 46, a rotatable drive member 48 projects into the cartridge and engages a take-up core, a shroud 50 and sound recording elements 52 are partially received in aperture 32, and a pin 56 disengages antibackup mechanism (not shown). Pin 4 entering notch 46 pushes an elongated slider 60 along a slot 62 so that complementary ramp surfaces 66 and 68 co-operate to raise the slider to bring portion 64 into engagement with cover 30 and thereby flex it into bowed condition: raising the slider removes the surface 72 of portion 64 from locking engagement in one of notches 84 so that ring 80, to which the film end is attached as by the insertion through aperture 82, is free to rotate as film is withdrawn form the roll.
Patent GB-498790-A (GB)
Title: Improvements in and connected with the closing and sealing of packages
IPC: B65D33/16
Filed: 1938-03-19
Abstract: 498,790. Sealing. BOUCHER FRERES ET CIE. March 19, 1938, No. 8509. Convention date, Oct. 4, 1937. [Class 146 (ii)] [Also in Group XVII] A seal or fastener for bags, sachets, &c. comprises a strip having two lozenge-shaped halves A, B connected by a narrow part C, and formed at one end with a head D forming a rivet and at the other with an aperture E with a conical rim F. The seals are produced in a band, the individual seals being joined at G in a manner permitting easy severance. In use, the fastener is bent around the mouth of a bag &c. and the parts D, F united by crushing. A machine for applying the fastenings to bags and sealing them comprises a support 2, Fig. 5, for a reel 5 of a band of fasteners and a pawl or finger 10 for feeding it downwards intermittently. The finger is carried on a lever 9 pivoted at 18 and oscillated by the action of a roller 13 on a notch 16. The bands pass through a guide 7 towards an opening 29, Fig. 6, in which the mouth of the bag &c., to be closed, is disposed. Nipping jaws 19, 19a are articulated at 20, 20a on a sliding block 21. The slides 12, 21 move, with a certain amount of lost motion in the case of the latter, and cause the jaws 19, 19a to close about their pivots. The first stage of the movement severs the lowermost fastener at the line of the joints G, and continued movement applies and rivets the fastener.
Patent GB-1060961-A (GB)
Title: Improvements in heat exchangers adapted for vapour generation and superheating
IPC: F22B1/06
Filed: 1964-02-28
Abstract: 1,060,961. Valves. BABCOCK & WILCOX CO. Feb. 28, 1964 [Feb. 28, 1963], No. 8559/64. Heading F2V. [Also in Division F4] In a steam generator heated by liquid metal a baffle (107), Fig. 4 (not shown), comprising six leaves (105) hinged about their outer, lower edges, directs downward flowing liquid metal in an outward direction and also acts as a relief valve permitting gas to escape from a lower part of the generator.
Patent GB-995611-A (GB)
Title: Improvements relating to driving mirrors
Inventor: MORGAN MERLIN JOHN
IPC: B60R1/04
Filed: 1961-03-09
Abstract: 995,611. Rear-view mirrors. JOHN MORGAN (JEMCA) Ltd. March 8, 1962 [March 9, 1961], No. 8583/61. Heading B7J. A driving mirror comprises a mirror proper 5, the whole of the rear face of which is secured by adhesive to a flat area 4 of a back plate 3 having a V-section lip 6 projecting forwardly of and surrounding the mirror 5, the back plate being formed from moulded thermoplastic so as to be self-supporting but non-rigid, and a mounting plate 7 covered by a synthetic plastic cover 9 fastened around its rim 8, by adhesive or welding, to the rim of the back plate, the plate 7 embodying a socket 10 engaged by a ball 11 on a mounting pillar 12 securable to the interior of a vehicle. A foam synthetic plastic insert may be fitted between the plates 3 and 7. Specification 878,224 is referred to.
Patent GB-902370-A (GB)
Title: Improvements in the preparation of aluminium alkyl sesquihalides
Inventor: FORSHAW EDWARD ROBERT ANTHONY
IPC: C07F5/06
Filed: 1960-03-11
Abstract: Alkyl aluminium sesquihalides are prepared by reacting aluminium flitters (as defined) with an alkyl halide at a temperature above 100 DEG C., the reaction being carried out by adding the alkyl halide to a dispersion of aluminium flitters in a liquid phase comprising an alkyl aluminium halide or sesquihalide and maintaining the unreacted aluminium flitters within the liquid phase during the course of the reaction.  The process is preferably carried out at a temperature between 120 DEG  and 150 DEG C., at a pressure below 10 lbs. per sq. inch and using the alkyl halide in excess.  It is preferred that the alkyl group in the alkyl halide should contain not more than 4 carbon atoms.  The sesquihalide formed may be reacted with a trialkyl aluminium having the same alkyl groups to form dialkyl aluminium halide, or it may be dehalogenated with sodium.  Specifications 762,200, 800,615 and 811,076 are referred to.
Patent GB-494416-A (GB)
Title: Improvements relating to glass sheets, tiles and other products
IPC: C03C17/02
Filed: 1937-03-24
Abstract: 494,416. Treating glass surfaces. PARKINSON, F. D. March 24, 1937, No. 8660. [Class 56] A method of decorating glass articles consists in coating the surface of an article wholly or partly with raw or fritted glaze, and subjecting the coated glass to such a temperature and for such a time that the glaze is fused but only a part of it combines with the glass, the residual glaze being removed after cooling by any convenient method, such as immersion in dilute nitric or hydrochloric acid or other solvent which is inert to the glass. The temperature to which the article is heated is generally sufficiently high to soften the surface of the glass, but it may be lower than this but high enough to cause the glaze to erode the glass.
Patent GB-165920-A (GB)
Title: Flexible mouldings for use by cabinet makers, coach builders, shipwrights, motor body builders, and the like
IPC: E04F19/04
Filed: 1920-03-25
Abstract: 165,920. Massey, I. March 25, 1920. Drawings to Specification. Mouldings.-Shaped mouldings for furniture, vehicles, and ships are cut from rattan cane. Two or more single mouldings may be combined to form a larger moulding. The mouldings may be bent by the action of steam or dry heat and retain their shape when cooled. Specification 6361/84, [Class 52, Furniture &c.], is referred to.