baber/WOPTO huggingface dataset:
Patent GB-737576-A (GB)
Title: Improvements in or relating to magnetic holders
IPC: B23Q3/154
Filed: 1952-08-14
Abstract: 737,576. Magnetic work-holders. SADLER, T. July 29,1953 [Aug. 14, 1952], No. 20477/52. Class 60. A magnetic work-holder comprises a block composed of two magnetic yokes 6, 7, Figs. 2 and 3, separated by a non-magnetic gap 9 and embracing a permanent magnet 1 which can be rotated either to a position in which the yokes form opposite poles or to a position in which the yokes act as keepers and thus absorb most of the field of the permanent magnet. The yokes are formed with inclined surfaces 12 to form a V-block for hokling round, square, hexagon and irregular shaped bar and with feet 13 separated by a strip of brass 14 or other non-magnetic material to hold the block on a support. Fig. 4 shows a modified construction in which the yokes are divided into three sections by non-magnetic spacers 15, the middle section being constructed so that the whole of its flux passes through the work while the end sections make full contact with the surface on which the block stands. The magnet is made in three sections 111, 112, 113 which may be independently rotatable by the provision of clutches. In both constructions the yokes and separators are held together by screws. A flat top may be substituted for the inclined faces 12.
Patent GB-450431-A (GB)
Title: Improvements in or relating to permanent magnets and alloys for the manufacture thereof
IPC: C22C38/10
Filed: 1935-07-19
Abstract: Alloys for permanent magnets containing iron, aluminium, nickel, copper, and cobalt and made by introducing part or all of the cobalt content, part or all of the copper content and a part of the iron content in the form of an aggregate comprising cobalt, copper and iron; such aggregate may be that produced as an intermediate product in the refining of copper cobalt ores.  Iron, nickel and the aggregate are melted, aluminium and, if required additional copper and other elements added thereto, the melt teemed into moulds, the castings cooled from 850 DEG  C. to 1350 DEG  C., preferably 1250 DEG C., naturally in air, by airblast or by oil quenching, and the castings age hardened or precipitation hardened by heating to 550 DEG C. to 750 DEG  C., preferably 600 DEG  C., and cooling naturally in air.  The alloy may comprise 10-25 per cent of nickel, 7-20 per cent of aluminium, 1-35 per cent of cobalt, up to 15 per cent of copper, up to 5 per cent in all of chromium, manganese, molybdenum, silicon, uranium, vanadium, tungsten, silver, tin, zirconium, tantalum, and titanium, and iron, the proportion of iron exceeding that of any one other constituent, the carbon content being below 1 per cent and preferably zero. The aggregate may comprise small quantities of sulphur, silicon, carbon, lead, manganese, nickel, antimony, zinc, and slag; such impurities are largely volatilized or pass into the slag but some may remain in the alloy.  Specifications 431,660 and 439,543 are referred to.
Patent GB-502004-A (GB)
Title: Containers for packeted articles, such as cigarettes
IPC: A47F1/10
Filed: 1938-07-12
Abstract: 502,004. Cabinets to hold packeted articles. TEBBUTT, C. July 12, 1938, No. 20584. [Class 18] A cabinet to hold a pile pf packeted articles, such as cigarettes, is provided with a hinged front cover 2 of transparent material or of opaque material with vertical slots 3 and also, if desired, covered with transparent material, a ledge I disposed below the lower edge of the cover 2 and on which the lowest packet rests and an inclined surface 10 to cause the lowest packet to project slightly. The front edge of the ledge and the lower edge of the cover can be provided with finger openings to facilitate withdrawal of the lowest packet. The delivery apertures can be closed by a hinged member 12 which can be locked in the position shown, and the cover 2 which is hinged along its upper edge is also held closed by the member 12. Graduations 9 indicate the number of packets left in a pile. The cabinet can be made of wood, metal, or synthet ic resin, and vertical partitions 4 are provided.
Patent GB-712730-A (GB)
Title: Improvements in or relating to ultra high frequency variable inductance tuning devices
IPC: H01F21/00
Filed: 1952-08-15
Abstract: 712,730. Impedance networks. MALLORY & CO., Inc., P. R. Aug. 15, 1952 [Sept. 15, 1951], No. 20592/52. Class 40 (8). [Also in Groups XXXV and XL(c)] An ultra high frequency converter utilizes a three gang variable inductor 121, 122, 123, each section comprising two concentric conductors with a movable contact to vary the inductance of the section, the converter being designed to cover the range of 470-890 megacycles. A tuning inductance device 10 comprises three separate variable inductances 11, 12, 13 all mounted on a single base plate 44 and operated by a single shaft 24. The three units 11, 12, 13 are all similar in construction and each comprise a pair of ribbon-like conductors 80, 80' (see Fig. 2) arranged concentrically and on edge and secured to an insulating base plate 18. A moving contact 21 (see Fig. 6) comprises a pair of arms of conductive material, forming a V-shaped member, which are secured to an insulating member 91, this latter member being attached to the operating shaft 24 by a sprung collett 90. Rotation of the shaft 24 therefore causes the contact 21 to move along the inner adjacent surfaces of the two ribbon conductors 80, 80' so as to vary the effective electrical lengths thereof to alter the inductance of the units. The members 27, 28, 29 may serve to screen each unit from each other and from external interference. Basically the converter comprises two RF circuits 124, 125 which are overcoupled to provide a relatively constant band-width, the UHF antenna 160 being capacitively coupled to the first tuned circuit 124 by means of two arcuate conductors 140, 141 which co-operate with the concentric conductors of the inductor. The two stages 124, 125 are tuned to the RF frequencies and are coupled together by a series L, C arrangement such that the coupling is nearly constant throughout the RF range. The third stage 126 of the variable inductor is used for the local oscillator 127 which tunes at 82 megacycles below the RF carrier. The tuned circuit 125 and the oscillator 127 are coupled to a crystal diode 128, the output of the diode being taken to an intermediate frequency amplifier 129 which has a single broadly tuned circuit 130 in the input and a double tuned circuit 131 in the output thereof, the band width of the output circuit being 12 megacycles. The IF amplifier comprises a grounded cathode triode and a grounded grid triode, the grounded cathode triode having a neutralizing circuit to lower the damping of the triode to raise the gain thereof. The input impedance of the grounded grid stage is of the order of 200 ohms, the output of this stage being taken to two tuned circuits across which is a capacitive potentiometer so as to enab'e the IF amplifier to feed into a 300 ohm television line 162. The power supply 137 is of the normal type and the switch 138 enables the VHF antenna 139 to be connected directly to the receiver at 161 or alternatively, the UHF converter may be connected to the receiver.
Patent GB-662121-A (GB)
Title: Vacuum pumps
IPC: F04C25/00
Filed: 1949-08-09
Abstract: 662,121. Rotary pumps. TRIGGS, W. W. (Kinney Manufacturing Co.). Aug. 9, 1949. No. 20675/49. Class 110(ii). [Also in Group XXXVII] A vacuum pump system comprises first and second stage pumps such as 16, 17 having ar interstage chamber 15, a valvecontrolled byepass 45, anc separate pump driver, the pumps operating in parallel when the byepass valve 20 or 48 is open. When the byepass pressure is reduced to a certain figure the valve is closed, manu ally or automatically, and the pumps then operate in series Fig. 3 shows a large displacement pump 16 having no oil sealing, discharging into the chamber 15 which leads to the pump 17 having a sliding-rock ing abutment 82 fixed to a gyratory piston 81. The latter is driven by a cam 80 on a shaft 64 from a pulley 91 driven by ar electric motor 23. In place o: the valve 48 the opening anc closing of the byepass 45 may be effected by a switch-oontrolled circuit 24 which includes the second-stage motor 23 and a relay-operated switch 25 which when de-energized, connects a solenoid 26 (Fig. 7), and when energized connects the firststage motor 21 with the circuit 24. The switch 25 is energizec when the switch 27 is closed by a pressure-actuated device 28 which is responsive to the pressure in the byepass 45. With the interstage chamber 15 connected to the inlet 18 the valve 20 is held open by the solenoid 26. When the pressure in the byepass 45 falls it reduces pressure in a chamber 28 and the evacuated bellows 29 expand to close the switch 27 to de-energize the solenoid and start up the motor 21. The valve 20 is then closed by atmospheric pressure. An alternative control comprises a " hot wire " in the chamber 28 wherein a tungsten wire is heated when a circuit is energized. Due to the increase in the conductivity of the gas as its pressure rises, the wire temperature decreases and contracts to close a switch. The pump 17, Fig 6, with inlets 43, has two chambers 78, 79, containing pistons 81 separated by a partition 77. Discharge ports in a casing 76 lead through non-return valves 85 to a chamber 51, and pipe 52 leading to a discharge chamber 53 containing baffles 55, 56, and a gas outlet 57. Oil separated out in the chamber 53, falls to the sump 59. From here, oil is fed to bearing 86 and into the housing 88 under control of a valve 97 actuated by a solenoid 98 which, preferably is in series with the motor 23 so that, when the second-stage pump is not in use the valve 97 is automatically closed to prevent flooding of that pump with sealing oil. The two pumps may be of any type.
Patent GB-367705-A (GB)
Title: Improvements in and relating to electric control systems for web-feeding apparatus
IPC: B41F33/18
Filed: 1931-07-20
Abstract: 367,705. Feeding webs; stopping- arrangements for printing - machines. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Hepperlen, J. A.; 266, 4th Avenue, East Orange, New Jersey, U.S.A.) July 20, 1931, No. 20741. Convention date, July 21, 1930. [Classes 100 (i) and 100 (ii).] In a modification of the web-feeding control system described in Specification 367,607, the severing-device is not actuated unless the broken end of the web wraps round the printing- cylinder, the press being otherwise merely shut down. The severing-device is actuated by light-sensitive control means responsive to variations in the light reflected from a surface whose light-reflecting characteristics vary with changes in the relationship between the member and the material. As described, the web 13 is severed by the cutter 25 only when the broken end of the web wraps round the normally exposed portion of the impression cylinder 29, thereby causing a variation in the amount of light from a source situated in the device 24, which is reflected as indicated in dotted lines to a photo-electric cell, also carried by the member 24. The electric motor system is similar to that described in Specification 367,607, but two photo-electric devices with their corresponding circuits and rectifiers are provided. A photo-electric cell 17 receives light from the lamp 20 in the event of a break in the web so that the arc starts in the discharge device 21, thus actuating a coil 22 to close a relay switch 23, whereby a coil 93 is energized to break the contact 74, thus interrupting the circuit of the main motor 12. This operates only when the switch 95 is closed i.e. when the press is being driven by the motor 12. If in addition the paper wraps round the cylinder 29, the severing-device 25 is operated ; the increase in the amount of light reflected decreases the resistance of the photo-electric device 24 so that the arc starts, thus energizing .the coil 31, which attracts the switch 32 to connect the operating coil 26 of the severing-device 25 across the terminals of the main motor 12. The web is accordingly severed provided the motor 12 is driving the 'press. Specification 334,267, [Class 100 (i), Feeding and delivering webs &c.], also is referred to.
Patent GB-218870-A (GB)
Title: Improvements in billiard tables
IPC: A63D15/06
Filed: 1923-08-15
Abstract: 218,870. Majno, G. Aug. 15, 1923. Billiards, tables for.-A pneumatic cushion for a billiard table consists of a single inflatable tube B which is held in place in a frame A by means of a facing strip C of thin material, preferably leather.
Patent GB-615530-A (GB)
Title: Improvements in photographic apparatus of the parallax panoramagram type
IPC: G03B35/24
Filed: 1945-08-13
Abstract: 615,530. Stereoscopic photography. RELIEPHOGRAPHIE SOC. POUR L'EXPLOITATION DES PROCEDES DE PHOTOGRAPHIE EN RELIEF M. BONNET. Aug. 13, 1945, No. 20808. Convention date, Aug. 8, 1941. [Class 98 (ii)] Apparatus for producing photographs of the parallax panoramagram type comprises a table provided with tracks on which run rollers having horizontal axes supporting a camera; two concentric tracks which guide the camera so that it always points at the object being photographed; and a third arcuate track, having a radius and centre different from the other two guide tracks, and serving to guide the negative carrier which is pivoted about its vertical median axis in the camera. As shown, the table 1 has tracks on its upper and lower faces for camera-supporting rollers 14 and arcuate guide tracks 2, 3 centred at O, the radius of the track 3 being R, against which bear rollers 8 carried between interconnected plates 5, 6 secured to the camera 7. The negative carrier 10 is pivoted in the camera at 9 and is guided by a roller 12 which is carried by a rod 11 mounted on the pivot 9 and which bears against a guide track 4 of centre O<1> and radius R-r, where r is the radius of the roller 12, the rod 11 being equal in length to the distance d between the centres O, O<1>. The distance 0-9 is thus equal to 0<1>-13 so that the negative carrier always faces the' same direction. To obtain exaggerated or attenuated relief effects the length of the rod 11 may be changed or the position of the rod and roller reversed to place the roller on the opposite side of the pivot 9. To permit change of magnification, instead of moving the front of the camera the negative carrier may be slid to a position such as 10<1> by slidably mounting the carrier pivot 9<1> on a rod attached to the camera base 6 and transmitting the guiding rotation of the pivot 9 to the pivot 9<1> by means of three arms of a parallelogram linkage. The Specification as open to inspection under Sect. 91 states also that the table mav have several sets of superposed or juxtaposed guide tracks to enable the camera to be displaced along arcuate paths centred on objects at different distances. This subject-matter does not appear in the Specification as accepted.
Patent GB-499046-A (GB)
Title: Improvements in and relating to cleaning metal surfaces
IPC: C23G1/12
Filed: 1937-07-28
Abstract: A cleaning-solution contains a substantially non-aqueous acid dissolved in nitrobenzene alone, or together with carbon tetrachloride.  The acid used may be nitric, formic or glacial acetic acid.ALSO:Magnesium and magnesium alloy articles are cleaned, using a solution of a substantially non-aqueous acid dissolved in nitrobenzene alone, or together with carbon tetrachloride.  The acid used may be nitric, formic, or glacial acetic acid.
Patent GB-1133521-A (GB)
Title: Asbestos dispersion
IPC: C04B20/08
Filed: 1966-05-11
Abstract: 1,133,521. Asbestos dispersion. UNION CARBIDE CORPORATION. 11 May, 1966 [14 May, 1965], No. 20864/66. Heading C1A. A chrysotile asbestos dispersion of 0À5-5% by weight is made by forming a slurry of the asbestos in water containing, by weight, not more than 100 p.p.rn. of monovalent anions and not more than 10 p.p.m. of multivalent anions, adding a water-soluble monobasic carboxylic acid containing not more than 6 carbon atoms to give a pH of 3À8-6À3 and applying highspeed shearing forces. The dispersion alternatively may be made by diluting an 8-10% by weight slurry prepared by the above process and/or the acid may alternatively be added to the water prior to slurrying the asbestos. The carboxylic acid may be saturated or unsaturated, substituted or unsubstituted but to avoid excessive foaming must not contain more than six carbon atoms. Formic, acetic, propionic, butyric, valeric, acrylic, crotonic, methacrylic, lactic, angelic, pyruvic and tiglic acids are suitable. The final slurry has a viscosity generally within the range 1-10 centipoise at 25 C.
Patent GB-1449772-A (GB)
IPC: A01N47/24
Filed: 1974-05-10
Abstract: 1449772 Insecticidal composition E I DU PONT DE NEMOURS & CO 10 May 1974 [11 May 1973 10 April 1974] 20866/74 Heading A5E A solvent system suitable for use in the preparation of liquid concentrates of 15-35% by wt S-methyl-N-[(methyl-carbamoyl)oxy]thioacetimidate comprises 20-92% by weight cyclohexanone of which up to 65 % by weight may be replaced by an equal quantity of cyclohexanol, 3-25%. by weight C1-3 alkanol and at least 5% by weight water, the composition of the system being such that when sufficient of the thioacetimidate to create a 35% by weight solution is dissolved therein at 25C, a single phase results. Preferred compositions comprise a 15-35% solution of the thioacetimidate in 60% cyclohexanone, 10-15% methanol and 25-35% water, the composition being such that the solution has a flash point greater than 100F. Colouring agents may also be added.
Patent GB-1284377-A (GB)
Title: Device for generating a plurality of sinusoidal oscillations in a carrier telephony system
IPC: H04J1/06
Filed: 1971-04-19
Abstract: 1284377 Carrier systems; transistor oscillator, harmonic generator and gating circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 April 1971 [5 Feb 1970] 20878/71 Headings H3T and H4R A frequency generator used in a carrier frequency system comprises a master oscillator which synchronizes a number of relaxation oscillators arranged to oscillate at respective frequencies. The relaxation oscillator outputs are fed through respective tuned circuits and gates, and the level of the signal at the output of the tuned circuit is monitored and if the output level drops, i.e. due to the relaxation oscillator operating at the wrong frequency, the monitoring circuit closes the gate to block the frequency from the output line. As described with respect to Fig. 2 the relaxation oscillator comprises, as described in Specification 1,180,144, a transistor 11 with high coupling between collector and emitter circuits and synchronizing pulses derive from a crystal oscillator 1 applied to the base. The output of the relaxation oscillator is derived from a tuned circuit 6 in the collector circuit and fed through an amplifier transistor 24 to the output 3. The signal across the tuned circuit 6 is also rectified by diodes 19 and used to switch transistors 21 and 23 so that transistor 23 conducts, allowing A.C. to pass through transistor 24 to output 3, only while the oscillator 5 is operating at the correct frequency to produce sufficient signal level across the tuned circuit to hold transistors 21 and 23 on. In an alternative form of circuit Fig. 3 (not shown) a single transistor (26) is used as the switching element between the tuned circuit and output circuit.
Patent GB-1102247-A (GB)
Title: Foundry cores
Inventor: FISCHMAN JEROME L
IPC: B22C9/10
Filed: 1966-05-11
Abstract: Foundry cores are manufactured by forming a slurry of comminuted refractories, a silicic acid sol. and a gelling agent e.g. ammonia, pouring the slurry into a core box and thereafter removing the green core therefrom, igniting the green core and allowing it to burn out, impregnating the core with phosphoric acid and firing the core e.g. at 1700-2000 DEG  F.  The slurry may be subjected to superatmospheric pressure to dissolve air bubbles or to subatmospheric pressure to cause them to pass out of the slurry. The green core may be impregnated with a lower alkanol i.e. 1-4 carbon atoms, e.g. ethanol after removal from the core box.ALSO:A silicic acid sol is prepared from an alkyl silicate, e.g ethyl silicate, by hydrolysis with water in the presence of a mutual solvent, the hydrolysis being carried out at elevated temperature, non-aqueous volatiles being distilled. In an example, the sol is prepared by heating a mixture of ethyl silicate and denatured ethanol to 80 DEG  C. and then dripping hydrochloric acid slowly into the mixture to initiate hydrolysis. After the addition of acid and the obtaining of an exothermic peak, the alcohol is distilled off. In another example, water is dripped into a mixture of ethyl silicate and ethanol which is then heated to boiling.  The heat is turned off and concentrated sulphuric acid slowly added. When the reaction has subsided, ethanol is removed.  The sol may be used as a binder in the production of foundry cores.
Patent GB-1259704-A (GB)
Title: An electron gun structure and an apparatus for assembling the same
Inventor: SAWAGATA SHINICHI
IPC: H01J29/82
Filed: 1969-04-24
Abstract: 1,259,704. Electron guns. TOKYO SHIBAUBA ELECTRIC CO. Ltd. 24 April, 1969 [25 April, 1968; 5 July, 1968; 30 Sept., 1968], No. 21022/69. Heading H1D. In a multiple electron gun, e.g. a triple gun for a shadow mask colour television tube, each gun comprises a cathode followed by five grid electrodes and the fourth grid 15a has a larger diameter than the ends of the third and fifth grids and is operated at 5 to 20% of the final anode voltage which is applied to the third and fifth grids. The fifth grid 16a may have an end portion of reduced diameter which extends into the fourth grid, as shown in Fig. 7, or may be generally cylindrical with a flared outer end, as shown in Fig. 14. Assembling electrodes.-In one arrangement, Fig. 7, the electrodes of a gun are mounted on a support rod 23 with intervening spacers 32-34 and clamped in a jig 27. Each spacer between the fourth grid 15a and its adjacent grids comprises two generally spanner-shaped members 32 and 32<SP>1</SP> (Figs. 10-17, not shown) each provided with a U-shaped slot the axes of which are displaced to define a circular aperture in which the projecting end of grid 14a or 16a is located, the members 32 being provided with cylindrical projections adapted to fit inside the grid 15a. The tapered end 24 of the rod 23 is pressed against a groove in a supporting member 21 by resilient means 37; two other similar assemblies (not shown) are accommodated in other grooves in member 21 so that the three guns are arranged in the required converging alignment whilst support tabs fixed to the electrodes are secured to glass support rods. In another arrangement, Fig. 14, the support rod 69 on which the electrodes are assembled has a tapered end which fits into a tapered aperture 61 in a base 60. Lateral support members 63 are pivoted to the base and are provided with pins 64 adapted to be received in a top plate 65; a spring 78 bearing on the top plate 65 applies pressure to the assembly. In this arrangement the fourth grid 15a is supported on a stepped portion of a cylindrical spacer 71; this is mounted in turn on a ring spacer 70 which may be supported by the rod 69, as shown, or may be supported directly by the base 60, preferably in a recess in the base (Fig. 17, not shown). Two slits are provided in the spacer 71 to allow passage of the support tabs (not shown) for the electrode 16a.