baber/WOPTO huggingface dataset:
Patent GB-1227624-A (GB)
IPC: H01S3/098
Filed: 1968-04-11
Abstract: 1,227,624. Lasers. TURLABOR A.G. 11 April, 1968 [13 April, 1967], No. 17655/68. Heading H1C. A single frequency output is obtained from a laser by frequency modulating the inherent frequencies of the laser with a modulating frequency # within a few parts per million to equal the spacing ## of adjacent inherent frequencies, generating two orthogonally polarized frequency modulated rays and passing the rays through a birefringent non-linear element. In the embodiment of Fig. 1 a helium-neon gas discharge tube V is disposed with a non-linear KDP birefringent crystal NL in optical cavity S1 82, the optic axis A2 of the crystal NL being disposed at an angle # corresponding to the emitted wavelength and the crystal. KDP crystal modulator M changes the optical path between reflectors Sl, S2 under the control of oscillator O operating at frequency # so that the several inherent oscillations m generated in the laser oscillator are frequency modulated with a frequency # m. The output from the oscillator thus constitutes a carrier frequency v 0 , Fig. 2 (not shown), having side bands at intervals ##. Because of the double refraction produced by birefringent crystal NL or crystal NL together with modulator M a second group of inherent oscillations m<SP>1</SP> is present in the output displaced by a small frequency # 1 # from the frequencies of the first group and orthogonally polarized thereto. One group of oscillations corresponding to the extra ordinary ray and the other as the ordinary ray pass through crystal NL where, owing to the non-linearity thereof, coupling takes place between the rays and an output S 2  at twice the laser carrier frequency v o  is obtained. The non-linear crystal may be disposed outside the laser cavity NL<SP>1</SP> and if the modulator M is not itself birefringent another birefringent crystal D must be placed in the cavity to generate the two rays of different carrier frequency orthogonally polarized to each other. In a second embodiment, Fig. 3 the discharge tube V<SP>1</SP> has windows arranged at an angle lower than Brewsters angle so that oscillations are produced polarized at 45 degrees to the drawing plane. After frequency modulation by modulator M the output passes through a first ray splitting Glan Thompson prism G1 which splits the rays into two orthogonally polarised partial rays one of which reaches a second Glan Thompson prism direct and the other by way of reflector S3. The rays then together pass through non-linear crystal NL so that an output at twice the carrier frequency is obtained. The difference of optical paths between prisms G1, G2 is adjusted so that the delay is an oddnumber multiple of 1./c.
Patent GB-1229225-A (GB)
IPC: B22C1/16
Filed: 1968-11-21
Abstract: 1,229,225. Refractory moulds. MICROFUSION S.A. 21 Nov., 1968 [23 Nov., 1967], No. 55218/68. Heading B5A. [Also in Division C1] Moulds for pouring of highly reactive materials are produced by coating a model with a layer of fluid composition, applying a powder thereto and hardening the first layer, repeating the coatings and hardening until sufficiently thick, extracting the model and baking the product mould, the fluid composition comprising a filler of graphite or superactivated carbon suspended in a binder of pH value equal to 2 at most, the binder also comprising colloidal silica or alumina. In an alternative embodiment, only the layers adjacent the model are formed by the composition, the external layers being constituted by a different composition capable of reacting with the highly reactive materials. The powder may be graphite or superactivated carbon. Hardening of the fluid composition may be effected by gelation with ammonia.
Patent GB-1229668-A (GB)
IPC: H01R4/64
Filed: 1968-09-30
Abstract: 1,229,668. Clips. ILLINOIS TOOL WORKS Inc. 30 Sept., 1968 [29 Sept., 1967], No. 46334/ 68. Heading E2B. [Also in Division H2] A printed circuit board 22 is mounted on a metal chassis 24 by means of a sheet metal clip 20 which also provides a grounding connection between the chassis and printed circuitry 28. A pair of resilient legs 68, 70 are adapted for insertion into an aperture in the chassis 24 until notches 56, 58 on wing portions 52, 54 of the legs snap around the edges of the aperture. A screw 38 passes through the printed circuit board 22, through a tapped hole 32 in the head 39 of the clip, and between opposed limbs 76, 78 of the legs, forcing them apart. When the screw is fully tightened, sharp contact points 40 dig into the printed circuit 28 and points 72, 74 dig into the chassis. A plurality of relatively small teeth may replace each point 72, 74 (Fig. 6, not shown). In a modification, the corner points 40 are omitted and replaced by sharp-edged bosses (40a Figs. 4, 5, not shown) punched out of short coplanar extensions of the head 39. In a further embodiment (Figs. 7, 8, not shown) the portions of the wings 52, 54 adjacent the head 39 are omitted. Pressed-out portions of the legs which are bent downwards at a distance from the head, carry sharp end points which contact the upper surface of the chassis and a pair of pressed-out barbs for engaging the printed circuitry.
Patent GB-1233927-A (GB)
IPC: G06F9/355
Filed: 1968-09-30
Abstract: 1,233,927. Data processing. BURROUGHS CORP. 30 Sept., 1968 [2 Oct., 1967], No. 46292/68. Heading G4A. A data processing system comprises an addressable memory containing a stack of information items linkable to a last in, first out stack implementation for processing, the stack having a plurality of stack areas of sequentially addressable memory locations each area having a mark word at its base which points to another mark word in the stack thereby linking the stack areas together in a tree-structured address environment, an information item below the top of the stack being selectable by combining an index value with the absolute address of a mark word, the absolute address being obtained from one of a plurality of display registers selected by a level value. Besides the registers two other groups of addressable registers (all utilizing transistor flip-flops) are provided, the addresses of the top and bottom of the stack in memory being specified by respective registers in the other groups. Each mark word is at the bottom of a portion of the stack used as local storage for a respective ALGOL programme block. Two further registers (not in any of the three groups) can act as the top locations of the stack. A third further register can receive an "indirect reference word" which provides the index value and also selects one of the display registers, the contents of which are stored in the registers of the second group (this step may be omitted) then added to the index value to address the memory to get a variable or parameter which is inserted in the third further register. The mark words link the stack portions according to a stack history list and an address environment list, the latter expressing which ALGOL blocks are contained within which in the programme.
Patent GB-1238020-A (GB)
IPC: F15C1/00
Filed: 1967-12-18
Abstract: 1,238,020. Fluid logic and switching circuits. JOSEPH LUCAS (INDUSTRIES) Ltd. Nov. 18, 1968 [Dec. 18, 1967], No. 57327/67. Heading F1P. Working fluid e.g. water from a source 18 is supplied alternately to opposite ends of a motor cylinder 12 containing a reciprocating piston 10 through a conventional load-sensitive fluidic bi-stable device 16 and non-return valves 19, 20 in conduits 14, 15 leading to said cylinder ends, and cylinder exhaust is passed to a reservoir 28 through a branch line of say conduit 15 between the closed non-return valve 20 and the cylinder end and through a control valve 22 maintained open by pressure in the flow passage thereof; a control valve 23 in the corresponding branch line of conduit 14 being held closed by pressure in conduit 14 upstream of valve 19 transmitted through a second branch line. The piston 10 has integral pumping pistons 11 housed in cylinder 13 and which draw from a tank 26 through one or other of check valves 27, and deliver to reservoir 28 through one or other check valves 29. The valves 19, 20, 22, 23 are of the free foil element type. The tank 26 may contain concentrated dialysate which it is desired to dilute with water prior to use in an artificial kidney machine.
Patent GB-1239498-A (GB)
IPC: F16B12/22
Filed: 1969-12-10
Abstract: 1,239,498. Stud-and-socket fastenings. NIPPON KOGAKU K.K. 10 Dec., 1969 [14 Dec., 1968], No. 60292/69. Heading E2B. A key-hole type stud-and-socket fastener, e.g. for securing a strap to a camera, comprises a headed stud 4 projecting from the camera to engage a key-hole 7d in strap-connector 7, this connector having a skirt portion 7a which is engaged by a spring-loaded retaining sleeve 5 to prevent inadvertent release.
Patent GB-1250723-A (GB)
IPC: B01J29/08
Filed: 1970-03-17
Abstract: 1,250,723. Zeolite catalyst composition. KONINKLIJKE ZWAVELZUURFABRIEKEN VOORHEEN KETJEN N.V. 17 March, 1970 [31 March, 1969], No. 12760/70. Heading B1E. A process for the preparation of a catalyst comprises mixing a first silica sol and/or gel, before drying, with a separately prepared, second gel containing silica and an oxide of at least one metal of groups IIIA and IVA of the Periodic Table, at least one of the gels or the sol containing a crystalline aluminosilicate zeolite, subjecting the mixture to further gelation if desired, drying the mixture and activating the catalyst. Preferably, the first silicon sol or gel should contain not more than 0.01% wt, based on the sol or gel of alkali metal oxide. Specified second gels are silica/alumina, silica/ thoria, silica/titania, silica/zirconia, silica/ alumina/thoria and silica/alumina/zirconia. Specified zeolites are those of the A, X, Y, L, D, T, Kb, mordenite and faujasite type, preferably ion - exchanged to reduce the alkali metal content, e.g. by Ca, Mg, H, NH 4  or rare earths. In the Examples the catalyst is actuated by heating in steam. The catalyst is regenerated by decarbonisation.
Patent GB-1251338-A (GB)
IPC: G21C9/027
Filed: 1968-02-28
Abstract: 1,251,338. Controlling reactors. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 24 Dec., 1968 [28 Feb., 1968], No. 9727/68. Addition to 1,106,436. Heading G6C. A control element operating mechanism has a releasable mechanical coupling 2, 5, for engagement with a control element 4, provided at one end of an extension member 1 the other end of which carries an armature 6, means 24, 26 being provided for releasably coupling the armature 6 to an electromagnet 20, 21 by effecting angular movement of the extension member 1, which angular movement also serves sequentially for uncoupling the extension member 1 from the control element 4, reverse angular movement imparted to the extension member 1 serving firstly to couple it to the control element 4 and then to mechanically uncouple the armature 6 from the electromagnet 20, 21. The electromagnet 20, 21 is movable axially by spindle and nut means 15, 19 but is held against rotation by keys 22 which engage keyways 23<SP>1</SP> in a stationary tube 23. Angular movement is imparted to the extension member 1 remotely by means of a tube 27 which has two opposed lobes 28 each engaging a keyway 29 in the member 1. The tube 27 extends upwardly outside the tube 23 and at its upper end (not shown) has two opposed vertical slots each engaged by a transverse pin carried by an inner tubular member and extending through arcuate slots in the tube 23, which slots limit the angular movement of the tube 27 to 90 degrees. Rotation of the inner tubular member is obtained by means of a reversible drive connected via a gear system. An external casing 35 is open at its lower end 41 and is provided internally with shielding (not shown) to prevent neutron streaming. The upper end of the casing 35 has a shoulder by means of which it is mounted on a rotatable shield provided in the vault roof of a fast reactor for refuelling purposes. Rotation of the member 1 is always effected with the armature 6 at the lowest point of travel and the keyways 29 are thus matched in their upper region to the lobes 28, but diverge in width as they extend downwardly to ensure that there is no jamming between the lobes 28 and the keyways 29 when the armature 6 is released for a reactor shutdown. During normal operation, the member 1 is connected to the control element 4 and disconnected from the electromagnet housing 20, i.e. its angular position is 90 degrees removed from that shown. When it is desired to refuel the reactor, the control element 4 is fully inserted and the tube 27 rotated through 90 degrees to disconnect the member 1 from the control element 4 and connect the armature 6 to the housing 20. The electromagnet assembly 18 is then raised by rotation of the spindle 15 sufficiently to free the lower end of the member 1 from the core, permitting the rotatable shield to be rotated for refuelling. A spring-loaded compressible connection 7 is provided between the member 1 and the armature 6 to simplify reconnection between the latter and the electromagnet 21 following a shutdown, and also to allow for thermal expansion and contraction of the member 1.
Patent GB-1258411-A (GB)
IPC: D04B9/46
Filed: 1968-01-11
Abstract: 1,258,411. Knitting. BENTLEY ENG. CO. Ltd. 9 Jan., 1969 [11 Jan., 1968; 23 Feb., 1968], Nos. 1756/68 and 8888/68. Heading D1K. To close the end of a fabric tube a pouch of turned double fabric, similar to a turned welt, is knitted of a yarn or yarns of a high degree of patent or latent twist liveliness. The wales thereby deviate from the longitudinal line, twist the fabric at the fold, and close or substantially close the tube. The closure may be assisted by knitting a non-torque yarn in the region of the fold, or twisting one end of the pouch through a quarter or half a turn before returning it to the needles.
Patent GB-1259336-A (GB)
IPC: G05G9/10
Filed: 1969-11-05
Abstract: 1,259,336. Hydrostatic transmission control; lirikwork. NORTH AMERICAN ROCKWELL CORP. 5 Nov., 1969 [16 Jan., 1969], No. 54321/69. Headings F2D and F2K. A control linkage for a hydrostatic transmission having a variable displacement swash plate pump supplying pressure liquid to a fixed displacement motor comprises a control lever 32 movable in a gate 33 to selectively engage and rotate arms 62, 91 fast with hubs 21, 19 carrying levers 63, (95) respectively connected through Bowden cables 76, 103 to a park lock mechanism and to a swash plate adjusting mechanism. The control lever 32 is pivoted at 24 to a block 16 which is pivotable on a shaft 14 perpendicular to the axis 24. A spring 59 biasses the lever 32 towards a neutral position in which it engages a recess 61 in the arm 62. In the neutral position the lower end 23 of the lever 32 rotates anticlockwise a plate 35 which acts through a Bowden cable 49 on a by-pass valve to divert pressure liquid from the pump to a reservoir. The plate 35 is additionally connected by a rod 46 to a switch 45 which only permits starting of a driving engine during neutral. Movement of the lever 32 along a slot 60 of the gate 33 towards a park position rotates the arm 62, hub 21 and lever 63 which acts through the Bowden cable 76 to move a fixed pin into engagement with a rotational component of the hydraulic motor. Movement of the lever 58 across the slot 58 away from the neutral position and towards the arm 91 causes clockwise rotation of the plate 35 which acts through a Bowden cable 49 on the by-pass valve to connect the pump to the motor. Thereafter movement of the lever 32 along a slot 81 of the gate rotates the arm 91, hub 19 and lever (95) which acts through the Bowden cable 103 to adjust the pump swash plate for forward or reverse drive. Ball detents 83, 92 locate the arms 62, 91 in their central positions. Lost motion spring connections may be provided in the linkages to the park lock and swash plate adjusting mechanism. In Figs. 12-14 (not shown) the arm (91) is resilient and in the neutral position engages between lugs (116, 117) to prevent inadvertent swash plate adjustment. Movement of the lever (32) across the slot (58) away from the neutral position moves the arm (91) against its spring bias away from the lugs (116, 117). In Figs. 12 and 15 (not shown) a spring finger (126) holds the lever (32) in the park position. In Fig. 16 (not shown) the arm (62) is resilient and, in the park position, holds the lever (32) in a recess (131).
Patent GB-1264811-A (GB)
IPC: B65D77/04
Filed: 1968-06-14
Abstract: 1,264,811. Moulded containers. E. S. & A. ROBINSON Ltd. 13 June, 1969 [14 June, 1968], No. 28551/68. Heading B8P. A moulded plastics container A, which may be vacuum formed, has secured thereto a cardboard cover B carrying printed matter. In the form shown, the container A of polystyrene has an out-turned rim 16 with a depending flange and out-turned flanges 30 on the walls of the cover B engage and are retained on the inside of the rim. This embodiment may be provided with a plastics lid that snaps over the outside of the rim 16. There may be a membrane under the lid made of a plastic, paper, card or aluminium foil or a combination of these materials and secured to the rim of the container. The membrane may be used instead of the lid. In a second embodiment (Figs. 4 and 5) the cover may have rounded corners, and tabs extending from two side walls cover the vertical corners and are secured to the end walls. In a further embodiment (Figs. 6-9) the container has a horizontal out-turned rim and the cover B has corresponding out-turned flanges which are heat sealable to the container rim.
Patent GB-1289661-A (GB)
IPC: F16B1/02
Filed: 1971-05-04
Abstract: 1289661 Slider holder YOSHIDA KOGYO KK 4 May 1971 [16 May 1970] 12896/71 Heading E2S  A slider holder which releasably holds sliders when they are to be mounted onto fastener elements has a body 10 with an elongate slot 13 therein extending to the top surface 12 which forms a rest for the slider. In a cavity 14 adjacent the slot is a lever 15 pivoted at 18 which has two stable positions. One is when the slider S is first placed on the rest 12 and its pull-tab P is placed in the slot 13. By pressing the slider down the end of pull-tab P which abuts surface 17' of lever 15 pushes shoulder 17 downwards and the lever swings so that it attains its second position when tip portion 16' engages in hole P 0  of the pull tab. The slider is then held in the device. The two positions may be maintained by leaf-spring- loaded balls 26 Figs. 2, 5 acting on cam surfaces 23, 24 of rhombic-sectioned portion 21 of lever 15. In other embodiments the two positions may be maintained by (a) a tension spring attached between the lever and a point on the frame below the pivot 18 and which goes "over-centre" and (b) a spring loaded plunger which acts on cam surfaces on the lower end of the lever, Fig. 9.
Patent GB-1294916-A (GB)
IPC: H02M1/08
Filed: 1970-06-24
Abstract: 1294916 Automatic current control FMC CORP 24 June 1970 [16 July 1969] 30623/70 Heading G3R [Also in Division H2] The current passing through an inductive load L, which is supplied from an A. C. source through a semi-conductor controlled rectifier SCR-1, is used to control the firing point of SCR-1 in each conducting half-cycle by means of a feedback circuit including a magnetic amplifier MA and a triggering circuit CK-1. The secondary current of a load C. T. is rectified and filtered before being applied to a first control winding W3 of the magnetic amplifier. A second control winding W4, connected in opposition to winding W3, may be supplied from a variable external signal at AA<SP>1</SP> or from a fixed reference signal depending on the position of switch SW-1. The windings W3, W4 control the impedance of load windings W1, W2 of the magnetic amplifier, the latter windings being energized by a transformer secondary TS-2 and thus producing pulses to control the switching of transistor T-1 and hence transistor T-2. The circuit produces hard firing pulses for SCR-1 and in order to ensure reliable operation when the latter is conducting for a full 180 degrees, a phase-advance circuit including resistor R11 and capacitor C3 is connected across transformer secondary TS-2. An application as a supply to the operating coil o a vibratory feeding device is mentioned.
Patent GB-1296610-A (GB)
IPC: H01M2/38
Filed: 1970-12-30
Abstract: 1296610 Metal-air batteries GULF OIL CORP 30 Dec 1970 [8 Jan 1970 61742/70 Heading H1B In a zinc-oxygen battery the zinc oxide which forms on the zinc electrodes during discharge is removed during battery operation by causing the electrolyte to flow at a high velocity over them. As shown in Fig. 1 a battery comprises two cell units 11 each having at least one zinc electrode 13 and at least one oxygen-providing electrode 15 of porous construction. Alkaline electrolyte, e.g. aqueous potassium hydroxide, is supplied to the cell units 11 from a reservoir 19 and is circulated by a high pressure pump 21 through a line 27, cooler 37, manifold 29 and lines 31 to the individual units, the electrolyte returning to the reservoir through lines 17. To limit the volume of electrolyte that must be pumped through this circuit to obtain a high velocity flow over the zinc electrodes a high velocity circulating system is induced in each unit 11 by an associated jet pump 23. The jet pump takes in electrolyte from a line 31 and also electrolyte leaving the top of the unit through an outlet pipe and ejects this electrolyte into the bottom of the unit so that it flows transversely across the floor and rises between the electrodes. A proportion of this electrolyte leaves the unit through line 17 and the remainder leaves through the top outlet pipe. The flow rate produced in the units 11 by the jet pumps 23 is about ten times that produced by the pump 21, the preferred flow rate in the units being 8 to 10 gallons per minute. The zinc oxide entrained in the electrolyte leaving through the lines 17 is removed by continuously passing a proportion of the electrolyte through a separation and storage device 33. This zinc oxide may be subsequently used for replating the zinc electrodes after they have been removed and replaced by new electrodes. The oxygen is supplied from a source 43 through lines 25<SP>1</SP>, alternatively, the oxygen may be provided by the use of nickel oxide electrodes. Fig. 2 shows a battery having an insulating housing 51 containing two cell units 53, each unit consisting of five zinc electrodes 13 carried by a removable insulating cover 57. The electrodes 13 are interleaved with hollow ferrous nickel electrodes 15 (Fig. 4, not shown) into which oxygen is supplied, mounted in the housing, Fig. 3. Each unit 53 is bounded by side walls 63, 65 and in each wall 63 a jet pump 23 is formed. The jet pump 23, Fig. 5, comprises a nozzle 111 on a pipe 109 connected through a passageway 107 and fitting 105 to a line 31. Excess electrolyte at the top of the unit leaves through a pipe 116, passageway 115 and fitting 117 connected to line 17. The remainder of the electrolyte at the top of the unit mixes with the electolyte issuing from the nozzle 111 and flows through a neck section 95 and diffuser section 97 to guide vanes 99 which distribute the electrolyte evenly over the cell floor 101 having ribs 103. The electrolyte now rises between the electrodes to the top of the cell and is recirculated by the jet pump 23.