baber/WOPTO huggingface dataset:
Patent GB-1154859-A (GB)
Title: Magnetic Second Harmonic Analog Device
IPC: G11C27/02
Filed: 1966-08-24
Abstract: 1,154,859. Circuits employing multi-stable magnetic cores. GENERAL ELECTRIC CO. 24 Aug., 1966 [10 Sept., 1965], No. 38042/66. Heading H3B. A magnetic core arrangement having a plurality of stable remanent states is cycled over closed minor hysteresis loops and the second harmonic content of the rate of change of flux is detected, means being provided for changing the remanent state of the core arrangement upon application of stepping pulses and the pulses each having an initial portion of one polarity and a subsequent portion of the opposite polarity and lesser magnitude. Magnetic cores 11, 12 have drive windings 13, 14 connected to A.C. source 17 and arranged to generate alternating fluxes of equal magnitude and opposite phase sense in the two cores. The cores have a common feedback winding 16 shunted by a dissipative load 38 to improve the hysteresis characteristic, and a common signal winding 15. Stepping pulses 20 are supplied to the signal winding from adapt pulse source 19 to determined the remanent state of the core arrangement. The output from winding 15 is synchronously detected in a balanced demodulator circuit 27 supplied with current from source 28 at twice the frequency of the current from source 17. The D.C. voltage detected by utilization device 33 indicates by its amplitude and polarity the remanent level of the core arrangement. The peak value of the A.C. current from source 17 is a small fraction of the current Ic required to exceed the coercive field of the core arrangement, whereas both portions of pulse 20 exceed Ic. The initial portion Ii of pulse 20 is larger than the terminal portion It, the ratio Ii-Ic : It-Ic preferably lying in the range 1À4:1 to 3:1. The pulse portions are preferably of equal duration. It is explained in the Specification how the ratio is adjusted, in initially setting up the device, so that linearity is achieved and so that the core arrangement is stepped from one saturated state to the other in the desired number of steps. A pulse generator for generating pulses having a first portion of one polarity and a second portion of the opposite polarity is shown in Fig. 3c. A trigger input source (Fig. 3a, not shown), triggers a first monostable multivibrator to generate a train of uni-directional, pulses I and a train of complementary pulses I. Resetting of the first multivibrator triggers a second monostable multivibrator to generate a train of uni-directional pulses F and a train of complementary pulses F. An add-subtract control signal # and its complement # are provided by a bi-stable multivibrator. The various pulse trains and control signals are applied as shown to initial pulse generator 66 and final pulse generator 67. As a result one of the generators produces a train of positive pulses and the other a train of negative pulses. The amplitude of the final pulse relative to the initial pulse is adjusted by variable shunt 110 and the overall amplitude of the pulse train produced by summing the initial and final trains is adjusted at 68.
Patent GB-1180267-A (GB)
Title: Gas-Blast Electric Circuit Breaker
Inventor: BIRT JOHN ROBERT
IPC: H01H33/867
Filed: 1967-08-18
Abstract: 1,180,267. Gas blast switches. ENGLISH ELECTRIC CO. Ltd. 9 Aug., 1968 [18 Aug., 1967], No. 38289/67. Heading H1N. A gas blast switch has two co-operating nozzle contacts 22, 36 which form a continuous passage in the closed position; a first exhaust valve (13) (Fig. 1, not shown) arranged to vent one end 27 of the passage, during interruption, to cause a rapid reduction of pressure within the passage; and a second exhaust valve 44 located at the other end 40 of the passage, opened automatically by the reduction in pressure and reclosed after a predetermined time. The contacts are located inside an insulator 20 held in compression by a glass fibre tube 16 and filled with compressed gas. Two such insulators containing series-connected contacts may be mounted respectively on opposite sides of a mechanism housing carrying the first exhaust valve (13). The valve 44 (Fig. 3) has an integral piston 45, one side of which is subject to compressed gas through a conduit 68 while the other side is connected through conduits 70, 73 and a shuttle valve 61 to the continuous passage. When valve (13) is opened the drop in pressure in space 65 causes piston 45 to move to the right to open valve 44. After a preset time compressed gas leaks from a chamber 60 through a narrow bore 62 and shuttle valve 61 is moved by gas pressure on piston 74 to close the conduit 70 and connect it to the compressed gas through conduit 71, equalizing pressure across piston 45 and allowing a spring 67 to reclose valve 44. After valve (13) is reclosed, pressure rises in the passage and shuttle valve 61 gradually returns to its initial position. An alternative construction for the second exhaust valve is described.
Patent GB-1280984-A (GB)
Title: Improvements in or relating to pistols
Inventor: HANCOX ROGER JOHN
IPC: A22B3/02
Filed: 1968-08-10
Abstract: 1280984 Captive bolt pistol ACCLES & SHELVOKE Ltd 10 Nov 1969 [10 Aug 1968] 38332/68 Heading AIM [Also in Division F3] A captive bolt pistol has the barrel and breach block incorporated in a single unit, rotatable about the barrel axis. The pistol is cocked and the spent cartridge ejected by rotating the unit. In a first embodiment (Fig. 1, 4) a torsion spring 15 one end in a cam groove 14 mounted on a semi-cylindrical heel attached to the block and the other end located in a slot 22 of the firing pin 20 so as to urge it upwards. The firing pin is retained in the cocked position by one end of the grooved portion 24 of sear 25 co-operating with shoulder 21 of firing pin 20. The sear is maintained in this position by helical springs 28, 29. The sear is also held in position by safety catch 34 which connects with spring biased rod 32 which co-operates with groove 39. When the safety catch is depressed with the thumb and trigger 27 is depressed with the fore finger, sear 25 is pushed out of engagement with shoulder 21 releasing firing pin 20. The cartridge then explodes driving captive bolt 6 forward in barrel 1, against resilient pad 10. The rod 32 of the safety catch mechanism lies between two pins 35 and is so made that the safety catch can be positioned on either side of the pistol, for right or left handed use. When the barrel I is rotated by means of grip 5, the spring 15 is rotated anti-clockwise by cam 14 (Fig. 2, not shown) forcing firing pin 20 down and recocking the gun. At the same time ejector rod 41 and ejector shoe 44 (Fig. 4) are forced outwards ejecting the spent cartridge by the action of the ejector rod against surface 43. Peg 40 limits the rotation of the barrel breech block unit. On rotating the barrel breech block unit in the reverse direction spring bias is again applied by spring 15 onto firing pin 20, by the action of the spring end in the cam groove 14. The unit is locked in the firing position by the sprung ball (47, Fig. 3, not shown) cooperating with groove (48). In a second embodiment (Fig. 6) the spring 15 is replaced by a sprung cam follower 50 acting on cam surface 14a. The sear unit 25a is spring biased towards the firing pin, and retained by trigger sear 52 acting in groove 25b. On pulling the trigger the sear moves rearward and wedge 24b co-operates with the groove in the firing pin, forcing the firing pin upwards. rotation of the barrel-breech block unit recocks the mechanism.
Patent GB-828239-A (GB)
Title: Method for refining and separating a metal selected from the group consisting of titanium, zirconium, cerium, hafnium and thorium
Inventor: JAZWINSKI STANISLAW TEODOR
IPC: B22F9/30
Filed: 1956-12-17
Abstract: Titanium, zirconium, cerium, hafnium or thorium are refined, or separated, by heating the metal with sufficient carbon monoxide to form the compound M(CO)7, where M is the metal, distilling off the M(CO)7 formed, and dissociating the distilled M(CO)7 by heating to precipitate the metal and release CO. Finely divided titanium is charged through 10 into pressure vessel 11 and is agitated by stirrer 18, while being heated to 300-800 DEG  C. by burners 12.  Excess CO enters at 13 and the pressure in 11 should be 2-10 atmospheres, which may be maintained by CO alone or by addition of inert <PICT:0828239/III/1> gas, e.g. helium or argon.  Preferred conditions are 400 DEG  C. at 4-8 atmospheres.  Where the reaction speed has fallen appreciably, as indicated by CO absorption, the temperature is raised 50-100 DEG  C. to distil the Ti(CO)7 in to the precipitation vessel 16 which is isolated by valve 19.  The temperature is raised a further 50-100 DEG  C. by gas burner 24, when titanium is deposited. The CO is purged through 22 by inert gas, e.g. helium or argon, entering at 21, and these purged gases may be led through additional precipitation chamber or chambers, to effect complete recovery of titanium, and the CO gases may be recycled to the pressure vessel. To effect separation of metls, e.g. zirconium and hafnium, the mixed metals are both converted to the carbonyls, then Zr(CO)7 is distilled first into one precipitation chamber, and Hf(CO)7 is distilled at a higher temperature to a separate precipitation chamber.  The two carbonyls are decomposed by further heating to precipitate the pure metals.  Alternatively, the Zr(CO)7 and Hf(CO)7 may be distilled together into a precipitation vessel in which the temperature is controlled to dissociate only the Zr(CO)7, and the Hf(CO)7 is purged to another vessel with the CO and inert gas for dissociation.
Patent GB-840953-A (GB)
Title: Improvements in or relating to alternating current amplifier circuits
IPC: H03F1/30
Filed: 1958-11-28
Abstract: 840,953. Transistor amplifying circuits. SIEMENS & HALSKE A.G. Nov. 28, 1958 [Nov. 28, 1957], No. 38475/58. Class 40(6). An amplifier has a first and second transistor each connected in a grounded emitter circuit with a capacitor connected directly between the collector of the first and the base of the second, and with a variable resistance path provided across the capacitor. In the embodiment shown, a driver stage for a push-pull amplifier has a transistor 8 in an earthed emitter circuit with its collector taken to the voltage source through a potentiometer 9. The tap of the potentiometer is connected through a variable resistor 10 to the base of a second transistor 1, and a further connection is made to the base of this transistor from the collector of transistor 8 through a capacitor 11. The standing base potential on transistor 8 is adjusted by means of a potential divider formed by the preset resistor 13 and the fixed resistor 14. Increase in temperature results in a fall in D.C. potential at the collector of the transistor 8, this fall producing a corresdonding drop in base potential of transistor 1 to compensate for the rise in collector current of this transistor.
Patent GB-303510-A (GB)
Title: Improvements in or relating to furnaces heated by oil burners
IPC: F23C5/02
Filed: 1928-12-31
Abstract: 303,510. Thery, R. Jan. 6, 1928, [Convention date]. Liyuid-fuel furnaces. - In furnaces in which several burners, more e particularly turbo-fan burners, are employed means are pro - vided for securely closing the furnace opening corresponding to a burner which is shut down. Each burner b has a slidable. tubular connection o with its opening and when a burner is closed down, the sleeve o is withdrawn and a refractory block e is lowered, guides l on the casing of the block serving to push the block into the aperture. Additional guides n co-operating with rollers, not shown, preserve the block in correct position when being raised and lowered and the link h connecting the block with the operating rod f is provided with a toe projection, not shown, to limit its angular movement as the block is pushed home.
Patent GB-1269730-A (GB)
Title: Fluorinated amides
Inventor: SWEENEY RICHARD FRANCIS
IPC: C07D213/40
Filed: 1969-07-31
Abstract: 1,269,730. Dry powder fire extinguishing composition. ALLIED CHEMICAL CORP. 31 July, 1969 [1 Aug., 1968; 9 May, 1969], No. 38568/69. Heading A5A. [Also in Divisions C2 and D1] A dry powder fire extinguishing composition comprises a dry powder fire extinguishing component (e.g. potassium, sodium, or magnesium bicarbonate, ammonium sulphate or phosphate, calcium carbonate or mineral barytes) and a acid addition salt or quaternary ammonium salt of an amide of general formula (I) wherein R f  is a group of general formula wherein each of the groups R<SP>1</SP> which may be the same or different, is a fluorine atom or a C 1-9  perfluoroalkyl group, or two of the groups R<SP>1</SP> together form a perfluoroalkylene group having up to 18 carbon atoms, at least one of the groups R<SP>1</SP> being a fluorine atom; each of u and v, which may be the same or different, is 0 or 1; each of m and n, which may be the same or different, is 0 or an integer of 1 to 20, m+n being 0 to 20, and each of the groups M, which may be the same or different, is a hydrogen or fluorine atom; subject to the provisos that v is 0 when m+n+u is greater than 0, v is 1 when m+n+u is 0, m is at least 1 when v is 0, and M is a hydrogen atom when n is greater than 0; Y is a hydrogen atom or an alkyl group having up to 6 carbon atoms; each of the groups R<SP>2</SP>, which may be the same or different, is an alkylene group having up to 6 carbon atoms; y is 0, 1 or 2; Y<SP>1</SP> is a hydrogen atom; an alkyl or hydroxy alkyl having up to 6 carbon atoms; an acyl group of general formula -CO-R f ; or a group of general formula -R<SP>2</SP>NYZ where Z is a hydrogen atom, an alkyl group having up to 6 carbon atoms or an acyl group of general formula -CO-R f ; each of the groups Y', when y is greater than 1, being the same or different; and Q is an unsubstituted or methyl- or ethyl-substituted pyridyl group or a group of general formula -NR 2 <SP>3</SP> wherein each of the groups R<SP>3</SP>, which may be the same or different, is an alkyl or hydroxyalkyl group having up to 6 carbon atoms, or one of the groups R<SP>3</SP> together with the group Y<SP>1</SP> form an alkylene group, or the groups R<SP>3</SP> together form an alkylene group: the quaternary ammonium preferably being of general formula wherein M, u, Y and R<SP>2</SP> and R<SP>3</SP> are as defined above, R<SP>1</SP> is a fluorine atom or a perfluoromethyl or -ethyl group, m is 1 to 10, n is 0 to 10, A is a halogen anion and R<SP>4</SP> is a hydrogen atom or an alkyl group, or R<SP>4</SP> and A together form carboxyalkyl anion -(CH 2 ) z COO<SP>-</SP> or alkanesulphonate anion -(CH 2 ) z SO 3 <SP>-</SP>, where z is 1 to 6.
Patent GB-969575-A (GB)
Title: Ships' lifeboat davits
IPC: B63B23/04
Filed: 1962-10-13
Abstract: 969,575. Davits. SAMUEL TAYLOR & SONS (BRIERLEY HILL) Ltd., and J. DEVONPORT. Sept. 5, 1963 [Oct. 13, 1962], No. 38836/62. Heading B7S. In a gravity davit in which the arms 10, from headsheaves 11 on which the lifeboat 12 is suspended by falls 13, are guided for rectilinear movement between stowed (Fig. 1) and boat-lowering (Fig. 2) positions upon fixed tracks 15 disposed athwartships and inclined downwardly in an outboard direction, the arms being rigidly interconnected (by a bridge structure 14) to afford a unitary assembly, the winch for operating the boat falls is mounted upon said assembly so as to partake of the movement thereof upon the tracks and is so disposed on the assembly that when the latter is in the boat lowering position (Fig. 2) the winch brake release lever 33 can be operated from the suspended boat by a flexible line 36. Lowering of the boat 12 on its falls 13, after releasing gripe wires 30 (Fig. 1) by operating a lever 31 on the bridge structure 14, is effected at a predetermined speed by a centrifugal brake 32 under the control of the lever 33 on said winch. The line 36 operates the release lever 33 via an auxiliary lever 34, and is coiled on a free-running spool 37 under boat seat 38. Specification 941,345 is referred to.
Patent GB-868002-A (GB)
Title: Improvements in or relating to magic lantern slide holders
Inventor: ROOYEN LIONEL JACQUES VAN
IPC: G03B23/14
Filed: 1958-12-02
Abstract: 868,002. Slide holders. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. Sept. 2, 1959 [Dec: 2, 1958], No. 38911/58. Class 97(1) A magic lantern slide holder comprises inwardly-biased grooved members for engaging opposite edges of a slide, fixed abutment means on one side preventing movement of the slide beyond a pre-determined position. As shown in Figs. 1 and 2 the V-grooved members 12 and 15 are positioned in recesses 9 and 8 of the side-members 3 and 4 of the slide holder and are carried on bars 13 and 16 which may move laterally in bearing holes in 3 and 4 against the inward bias of springs 14 and 17. The members 3 and 4 are also grooved in rectangular U-section and in the rest position, the bottom of the groove in 12 is in line, or slightly inward of, the groove in 3. Insertion of a slide through a slot in 5 will push up the spring-loaded pin 20 thereby rotating the lever 10 about the pivot 11 in a clockwise direction, whereby-the grooved member 15 is pushed into firm yet resilient engagement with the edge of the slide, the latter being thus firmly gripped in correct alignment by the V-grooves in 12 and 15 whatever its thickness within the limits imposed by the maximum width of the V-grooves.
Patent GB-1429777-A (GB)
Title: Fluid release valve
IPC: B60C17/10
Filed: 1972-08-22
Abstract: 1429777 Lubricating the inner surface of a tyre DUNLOP Ltd 15 Aug 1973 [22 Aug 1972] 39061/72 Heading B7C [Also in Division F2] A valve for releasing fluid, e.g. lubricant, into the cavity of a pneumatic tyre and wheel assembly when the tyre is punctured or deflated comprises a rupturable membrane 5, a cylindrical member 6 which, when free to move under the influence of spring 21, ruptures the membrane to permit fluid contained in chamber 4 to flow along bore 2 into the cavity. Movement of the member 6 is prevented by a rod 8 which normally engages the side of a piston 3 and extends into the bore 18 in which the member 6 is located, the piston 3 being maintained in its normal position by tyre inflation pressure acting on end 25 and by air pressure within chamber 11. Puncturing or deflation of the tyre will cause the piston to move under air pressure in chamber 11 to the illustrated position. Prior to attaching the valve in a tyre and wheel assembly the member 6 is moved to its illustrated position and the piston 3 is moved to the left so that a spring biased pivoted arm 26, Fig. 2, can be engaged in a groove 28 in the end 25 of the piston. After incorporation of the valve in the assembly, the tyre is overinflated. With the valve attached to the wheel rim well and provided with a reservoir of fluid within its body V or in communication via bore 24a with a reservoir extending circumferentially around the rim, the overinflated tyre moves the piston 3 to the left to allow the arm 26 to return to its Fig. 2 position. The tyre is now deflated to its normal inflation pressure The valve may be largely made by injection moulding plastics. The membrane and sealing collar 17 may be of aluminium or aluminium alloy with the membrane and sealing collar being bonded together. Alternatively the collar and membrane may be integrally moulded from plastics or rubber.
Patent GB-1112031-A (GB)
Title: Process for the copolymerisation of ª‡-olefines with ªÏ-halogen-ª‡-olefines at low prssure
IPC: C08F212/06
Filed: 1966-09-01
Abstract: Copolymers of a -olefines and o -halogen-a -olefines are prepared by copolymerizing at least one a -olefine of the formula CH2=CH-R where R is hydrogen, alkyl, aryl or aralkyl with at least one o -halogen-a -olefine of formula CH2=CH-(CH2)n-CH2X where n is 1 to 15 and X is a chlorine, bromine or iodine atom at a temperature of 30-150 DEG  C. with catalysts which consist of combinations of titanium trichloride, an aluminium trialkyl and/or an organo aluminium compound containing halogen, with the addition of an alkali metal halide, the catalyst concentration in the polymerization mixture being 0.1 to 100 millimols TiCl3/litre of dispersing medium.  In Example 1 5-chloropentene-1 is copolymerized with propylene using a catalyst comprising diethyl aluminium monochloride, KCl and TiCl3 in absolute heptane the polymerization being stopped with butanol.  In Example 2 11-chloroundecene-1 is copolymerized with propylene using the same catalyst. In Example 3 5-chloropentene-1 is copolymerized with ethylene and in further examples 4-chlorobutene-1, 5-iodopentene-1, 11-bromoundecene-1, RbCl and CsCl are used.
Patent GB-345990-A (GB)
Title: Improvements in and relating to coin-freed amusement and dispensing devices
IPC: G07F17/32
Filed: 1929-12-23
Abstract: 345,990. Mechanical toys. CROAD, A. K., 70, Chancery Lane, London.- (Rabkin, W. ; 445, West 31st Street, New York, U.S.A.) Dec. 23, 1929, No. 39275. [Class 132 (iii).] A crane boom 23, Fig. 2, carrying a grab bucket 19 is moved laterally by rotating a hand-wheel 15 to position the grab over a selected part of a bin 20 containing candy or toys 18, and a coin is then inserted in a slot 14 to close a switch 48 in the circuit of an electric motor 49 for actuating the grab, which takes a quantity of articles from the bin and conveys them to a discharge shoot 17. The boom 23 is carried by a rod 24 mounted by a universal joint 25 on the bottom 26 of an enclosing glass-fronted cabinet and is moved laterally by stirrups 33, 34, projecting from a plate 31 which is pivoted at its lower end 32 to the back wall of the cabinet. The plate 31 is rocked by a rod 42, Fig. 1, connected to a crank pin 41 on a toothed disc 39 which is rotated by a pinion 38 on a shaft 37 carrying the hand-wheel 15. The motor 49 through worm gearing drives a shaft 56 carrying four cams 60, 61, 71, 72. The cams 71, 72 actuate spring-controlled hinged rods 73, 76 which are connected by cords 30, 29 to the grab to open and shut this and raise and lower it respectively at the proper times. The cam 61 operates an S-shaped lever 67 connected by a chain 68 to the boom to pull this to an upright position before the grab discharges its contents to the shoot 17. Weights 79 connected to the boom by a chain 80 aid in lifting the boom. The cam 60 engages an arm 62 which is connected by a chain 55 to mechanism for opening the switch 48.