baber/WOPTO huggingface dataset:
Patent GB-387796-A (GB)
Title: Improvements in alternating current generators incorporating discharge tubes
IPC: H03K3/37
Filed: 1931-12-02
Abstract: 387,796. Converting. RYALL, L. E., 159, Westmead Road, Sutton, Surrey. Dec. 2, 1931, Nos. 33396/31 and 2589/32. [Class 38 (ii).] In an oscillation generator a gas discharge tube 6 is connected between the anode and grid systems of a thermionic valve 1, the anode being connected to the supply 2 through a resistance 3 and associated with a condenser 7 in parallel with it or with a resistance 5 which. is connected between the grid and a negative bias supply 4 thereto., The output is taken from a resistance 9 in series with a condenser 8. To compensate for supply voltage variations the grid bias voltage Vg, Fig. 2, is obtained from a proportion v of the main supply V through a bridge network comprising resistances 47, 48, 49 and a gas discharge tube 50, the output Vg being connected to a condenser 46. If grid bias is obtained from a battery the battery is connected in series with a part of a potentiometer resistance across the main supply. The harmonics in the wave form are reduced by connecting a gas discharge tube across a transformer output from an amplifier valve, resistance-capacity coupled to the oscillator, in series with a potentiometer resistance and a condenser, the output from across the resistance being passed through a series of low-pass resistance-capacity filters to one or two amplifier valves. The condensers of the low pass filters are ganged with the main oscillator condenser 7 and with the coupling condenser between the oscillator 1 and the amplifier valve. When the resistance 5 is used to control the frequency the filter resistances and the coupling resistance between the oscillator 1 and the amplifier valve must be varied proportionately with it for constancy of output voltage. The resistance 5 may be constituted by a thermionic valve whose resistance is controlled by its grid - cathode potential and, in an arrangement generating cyclically varying frequencies, Fig. 7, the grid of this valve 24 is supplied from a battery 25 and resistance 26 which latter is connected in an auxiliary relaxation oscillation circuit 26 .. 29. To compensate for voltage variations in such an arrangement, the grid potential of the resistance valve 30, Fig. 8, is obtained from a resistance 31 in series with a battery 35 and a resistance 32 in the auxiliary relaxation oscillation circuit whilst the bias of the oscillator valve 33 is obtained from a resistance 34, resistances 31 and 34 being bye-passed by a condenser 36. The. grid voltage of the valve 30 may be obtained from A.C. mains supply. This form of oscillator is suitable for testing microphone transmitters and telephone and loudspeaker receivers.
Patent GB-669169-A (GB)
Title: Mechanical silent tappet
IPC: F01L1/22
Filed: 1949-12-30
Abstract: 669,169. Cams & tappets. STANCLIFF, C. L. Dec. 30, 1949, No. 33419/49. Class 80 (iii). [Also in Group XXVII] A resilient ''silent tappet" device E for internal conbustion engines is screwed by a shank 9 into a valve lifter D and comprises a head 11 and a spaced cover 12 which is resiliently held in contact with a valve stem 3. The head 11 integral with the shank 9 has a number of camshaped recesses 18, which may be part-spherical depressions or radially extending grooves; the cover 12 has similar recesses 20, and balls 19 roll in the recesses to space the head and cover. The cover 12 has a flange 13 provided with fingers retaining the ring-shaped end 15 of an arm 14 (Fig. 2) projecting through a recess in the flange so as to move with the cover. An arm 22 having a forked end 23 engaging a pair of grooves in the shank 9 is thereby movable with the head 11, and a spring 26 interconnects the two arms 14, 22, the end of each being provided with a plurality of holes 24, 25 for this purpose. The spring 26 urges the balls 19 towards the shallow parts of the recesses 18, 20, thus resiliently holding the cover 12 against the valve stem 3. When the valve lifter .D is operated by the cam C, the spring 26 yields to allow the balls 19 to roll to the deepest parts of the recesses, in which position they may carry the thrust or, in a modification, allow the thrust to be taken by direct contact between the head 11 and cover 12. In a modification, Fig. 6 (not shown), the arms 14 and 22 are dispensed with and the head and cover are connected by a single-turn spring encircling them. Lubrication may be effected by oil forcefed through passages to the head 11, or by grease contained in a reservoir in the lifter D and forced, when required, to the head 11 by rotation of the shank 9. The device is also applicable to overhead valves, and may be placed between the rocker arm and valve stem, Fig. 10 (not shown), or between the rocker and push rod, Fig. 11 (not shown).
Patent GB-1397138-A (GB)
Title: Process for the recovery of cyclopentene and conjugated diolefins
IPC: C07C7/10
Filed: 1972-07-18
Abstract: 1397138 Separation of hydrocarbons ERDOLCHEMIE GmbH 18 July 1972 [21 July 1971] 33464/72 Heading C5E Aliphatic conjugated C 5  diolefins and/or cyclopentene are separated from a mixture of paraffinic, olefinic and diolefinic C 5  hydrocarbons and unsaturated C 4  hydrocarbons and optionally dicyclopentadiene by subjecting the mixture to liquid/liquid extraction with a selective solvent, e.g. a mixture of N-methyl-pyrrolidone and water, the paraffins, monoolefins and dicyclopentadiene, if any, being run off as raffinate, and the extract solution being delivered to an extract reflux column in which (a) the C 4  hydrocarbons are completely degassed as head product which is then distilled to separate off 1,2-butadiene, 1,3-butadiene and 2- butine and then returned to the extractor, and (b) the pump product from the column is delivered to a degasser in which the aliphatic C 5  hydrocarbons having two conjugated double bonds and/or cyclopentene are separated off. The starting mixture may be heated to effect dimerization of the cyclopentadiene to give the dicyclopentadiene before the liquid/liquid extraction.
Patent GB-1279143-A (GB)
Title: Improvements to programmers for electric household appliances
IPC: G05B19/06
Filed: 1969-07-03
Abstract: 1279143 Time switches CROUZET 3 July 1969 [15 July 1968] 33513/69 Heading H1N A stepping programme for washing machines having electromagnetic means to interrupt the stepping during certain portions of the programme cycle is provided with an auxiliary timer which is manually mechanically adjustable and actuates contacts to restore the stepping after a predetermined time interval, the timing of said auxiliary timer being provided by the motor normally producing the stepping. In the embodiment of Fig 1, a synchronous motor (not shown) drives a spiral cam 1 to oscillate a pawl 3, and an electromagnet 21 is normally energized to withdraw its armature 20 whereby pawl 3 is allowed to step the ratchet wheel 5 which is keyed to the programming cam-shaft 6. The electromagnet is de-energized by a programme cam (6a, Fig. 2, not shown) when stepping is to be suppressed, for example, during heating or filling operations, in which case a temperature- or water-level-responsive device (23 or 24) is selected by a programme cam (6b or 6c) and re-energizes the electromagnet to restore stepping upon completion of the operation. In the case of an extended soak period, however, the stepping is resumed after a predetermined time interval. This is effected by contacts 17, 17<SP>1</SP>, which are placed in the circuit of electromagnet 21 by a programme cam (6d), and are closed by a camming projection 12a carried on a time wheel 12 which is slowly rotated away from a start position, defined by projection 12a abutting a relatively fixed stop 14a, by a rotary lug 11 driven from the spiral cam 1 via gearing 7, 8, 9, 10. When the electromagnet is thus energized a lug 20a on its armature 20 removes a pawl 18 from engagement with the wheel 12, and a spring 13 returns wheel 12 to its start position. Stop 14a is carried on a wheel 14 coaxial with wheel 12 and a knob 15 is coupled thereto by gears 14<SP>1</SP>, 14<SP>11</SP> for adjustment of the stop 14a, and hence of the time interval. During stepping of camshaft 6 the pawl 18 is maintained out of engagement with wheel 12 by the lug 20a and hence wheel 12 immediately returns after each small movement by the rotary lug 11, but during step suppression for heating or filling operations the wheel 12 will be advanced and, to avoid overstressing of the spring 13 should the knob 15 be set to a shorter time interval than is required for the particular operation, a portion 12b of wheel 12 has no teeth and hence wheel 12 cannot be retained by pawl 18 beyond tooth 12c. In a modification (Figs. 3 and 4, not shown) the electromagnet is arranged to suppress stepping when energized, the contacts 17, 17<SP>1</SP> are normally closed and are opened by the projection 12a. This arrangement does not require the programme cam (6a, Fig. 2, not shown) to maintain energization of the electromagnet during normal stepping.
Patent GB-623452-A (GB)
Title: Aluminium-magnesium alloys
IPC: C22C21/06
Filed: 1946-11-11
Abstract: An aluminium-base alloy consists of 9-12 per cent magnesium, 0.001-0.05 per cent boron and the balance aluminium, the preferred amount of magnesium being 10 per cent.  A molten aluminium-magnesium alloy containing 9-12 per cent magnesium is degasified by introducing boron trichloride at a point adjacent the bottom of the bath and continuing the introduction for such time after degasification as is sufficient to introduce into the alloy the requisite amount of boron, this time being calculable on the approximate basis of two seconds per pound of alloy.  U.S.A. Specification 2,369,213 is referred to.
Patent GB-521559-A (GB)
Title: Improvements relating to carrier transmission systems
IPC: H04B3/10
Filed: 1938-11-18
Abstract: 521,559. Volume control. STANDARD TELEPHONES & CABLES, Ltd., and JACOBSEN, B. B: Nov. 18, 1938, No. 33583. [Class 40 (iv)] In a carrier-wave transmission system, control of a gain-adjuster or level indicator is effected by the sum or difference frequency current derived from two pilot currents which preferably 'differ in frequency by a small amount, e.g., 15 or 30 cycles. Preferably the pilots are filtered from the main transmission and fed to a bridge rectifier or other device having a square law. The control circuit may be coupled to the transmission line by means of a hybred coil or like arrangement such as that employed for coupling the negative feedback path to the amplifier described in Specification 506,791.
Patent GB-387462-A (GB)
Title: Improvements in tobacco pipes
IPC: A24F7/04
Filed: 1931-12-04
Abstract: 387,462. Tobacco pipes. GRAY, W. H., 14, Rowallan Gardens, Broomhill, Glasgow. Dec. 4, 1931, No. 33587. [Class 130.] The mouthpiece C and stem B are formed with chambers r into which fit the ends of a tubular connecting - member formed with a collar A arranged to project beyond the periphery of the stem and mouthpiece for facilitating detachment of the parts, the tubular member being filled with absorbent material. The Provisional Specification refers to baked clay chips as a filtering-material.
Patent GB-443614-A (GB)
Title: Improvements in or relating to closures for tin canisters and other like receptacles
IPC: B65D45/32
Filed: 1934-11-23
Abstract: 443,614. Closures for tin canisters &c. GINZLER, F. G., 3, Royal Terrace, Southendon-Sea, and FRANCIS, J. H. E., Thames Ironworks, John Penn Street, Lewisham, London. Nov. 23, 1934, No. 33649. [Class 125 (iii)] A vacuum closure for a tin canister or like receptacle a, Fig. 1, for tobacco, foodstuffs, paints, &c. comprises a flanged lid b furnished with a rubber ring c adapted to make an airtight joint with the top edge a<1> of the canister and attached by atmospheric pressure due to exhaustion of air from the interior, additional securing means comprising either depending lugs b<3>, b<4> on the lid or a removable flanged band x, Fig. 5, and means for breaking the vacuum consisting of a deeper lug b<5> in the edge of the lid having slits or creases b' that the lug on being bent outwardly or upwardly causes a rupture in the lid to break the vacuum. The canister a is formed with a beaded edge a<1> and an annular recess a<2>, the rubber gasket c being accommodated in a recess b<2> in the lid b, Fig. 4, and the three lugs b3, b<4>, b<5> being spaced equidistantly and engaging the recess a<2>. In the modified form, the band x which is substituted for the lugs b<3>, b<4>, is secured by a tongue x<1> and slot x<2>.
Patent GB-206730-A (GB)
Title: Apparatus for feeding pigs and the like
IPC: A01K5/02
Filed: 1922-12-09
Abstract: 206,730. McIntyre, J. H. Dec. 9, 1922. Feeding-appliances for animals.-A feeder for pigs &c. comprises a hopper 1 connected to each of one or more troughs 10 underneath it by a delivery outlet 2, which is normally closed by a flap valve 4 rigid with a lever 5 pivoted at 6 and counterweighted at 7. When the pig &c. pushes in the door 8 to reach the trough 10 the lever 5 is rocked to the position shown in dotted lines so that food passes from the hopper to the trough. A baffle 3 prevents choking of the outlet 2. In the drawing only one half of the hopper is shown, there being one or more troughs on each side.
Patent GB-410036-A (GB)
Title: Improvements relating to steam generators
IPC: F22B37/26
Filed: 1933-11-30
Abstract: 410,036. Heating feedwater; purifying steam. SUPERHEATER CO., 60, East 42nd Street, New York, U.S.A.-(Assignees of Powell, J. A. ; 25, Upland Road, Wyomissing Hills, West Lawn, Pennsylvania, and Armacost, W. H. ; 153, W. 188th Street, New York, both in U.S.A.) Nov. 30, 1933, No. 33681. Convention date, Dec. 31, 1932. [Classes 64 (i) and 123 (ii).] Steam from a boiler drum 1 is purified by passing it through feedwater in a drum 2, the feedwater being so directed across the drum as to create a surface current carrying off floating impurities, which enter the boiler with the feedwater. The nozzles 17 through which the boiler steam is discharged into the feedwater are surrounded by plates 18 forming vertical open-ended channels, and a perforated plate 24 is arranged above the nozzles and slightly below the surface of the water. The feed pipe 7 discharges into a longitudinal trough 9, from which the water overflows and passes under a vertical plate 11 into the body of water in the drum. The water flows from the drum through notches 13 in the side of a longitudinal trough 12 at the inlet to the pipes 8 conducting the water to the boiler drum. Feedwater may be taken directly to the boiler drum through a pipe 26. Specification 408,912 is referred to.
Patent GB-406441-A (GB)
Title: Improvements in or relating to pneumatic pressure devices for pressure beams of paper or like cutting machines
IPC: B26D7/02
Filed: 1932-11-28
Abstract: 406,441. Air compressors. JOHNEWERK. GRAFISCHE MASCHINEN AKT.- GES., 44, Schõfferstrasse, Bautzen, Germany. Nov. 28, 1932, No. 33698. Convention date, Jan. 23. [Class 8 (i).] A machine for cutting a pile of paper sheets or the like is supplied with pneumatic pressure for the press beam, said pressure being obtained by running the machine idly from an electric motor or the like until the required pressure is obtained. As shown, a pressure beam 4 is connected by linkage with shafts 15, 21, on which are mounted rods 18, 22 respectively connected by links 24a, 24 with a piston 25. With the piston stepped as shown there is provided a small pump space 29 below and an air reservoir 28 above. Liquid seals, 35, 36 assist in maintaining pressure and non-return valves 30, 33 are provided to connect respectively the pump space with the atmosphere and with the reservoir. A safety valve 38 is also provided. A shaft 9<a> is driven by a suitable source of power to rotate a crank 10 connected by a link 11 with a slotted portion 12 for a pin 13 connected to a rod 14 mounted on the shaft 15. A pin 47 when placed as shown in Fig. 1 makes connection between the slotted link and the rod 14 and as the shaft 9<a> rotates, air under pressure is pumped into the reservoir. The machine is run idly until sufficient pressure is obtained to hold a pile of paper while being cut. Removal of the pin 47 breaks connection and enables the pressure in the reservoir to press the beam against the stack. Thereby the shaft 9<a> acts to drive the knife through the pile of paper during the cutting operation without power being taken from it to effect the pressing operation. In other forms of the apparatus dual arrangements of cylinders and reservoirs are employed arranged at the ends of the pressure beam and above or below the knife.
Patent GB-1304068-A (GB)
IPC: B65D39/08
Filed: 1970-07-10
Abstract: 1304068 Portable containers; container closures C A NEUBECKER 10 July 1970 [29 July 1969] 33724/70 Headings B8D and B8T The ends -3 and 4 of a cylindrical metal beer cask 1 are each provided with a bung-hole and a bung 5 or 9, the bung 5 incorporating a fixed or rotatably-mounted spraying head 7 having multiple nozzles 8 to facilitate cask cleaning and the other bung 9 incorporating a filling and drainage valve 10. The valve may be a magnetic or spring- closed valve. The head 7 is also utilized for venting the cask during filling and for injecting CO 2  pressurizing gas into the filled container on broaching. Beaded feet rings 2 are provided at each cask end.
Patent GB-392253-A (GB)
Title: Improvements relating to escalators or moving stairways
IPC: B66B23/14
Filed: 1931-12-07
Abstract: 392,253. Escalators. SIMON, Ltd., H. and KININMONTH, C. P., Bird Hall Lane, Cheadle Heath, Cheshire. Dec. 7, 1931, No. 33855. [Class 78 (i).] In escalators of the type in which the stair treads with their risers are pivotally secured to endless chains at or about the base of the risers, the chains are replaced by an endless belt, or belts f, and the treads c and risers b are arranged so that they are always wholly outside the area enclosed within the belt or belts. A spindle d is passed through the side frames of each step and is attached by bolts e to the belt f.
Patent GB-1012272-A (GB)
Title: Method for the production of petroleum resin
IPC: C08F240/00
Filed: 1962-09-05
Abstract: A petroleum resin is obtained from a petroleum fraction of boiling-point below 300 DEG  C. and containing cyclodienes and other unsaturated hydrocarbons of not less than 4 carbon atoms, by first contacting the fraction with a tetrachloride of a Group IV metal (e.g. Sn, Ti, Ge or Zr) to polymerize the cyclodienes, and then contacting the product with an aluminium halide to polymerize the other unsaturated hydrocarbons.  The reaction mass may be purified by washing with water and/or aqueous alkali and then optionally with a solution of a chelating agent, e.g. oxalic acid. The resins find application in paints, varnishes and sizes.
Patent GB-321567-A (GB)
Title: Improvements in apparatus for use in rearing chickens and the like
IPC: A01K31/18
Filed: 1928-11-20
Abstract: 321,567. Smith, W. R. N., and Allison, A. M. Nov. 20, 1928. Releasing-appliances.-A brooder adapted for use in rearing a number of segregated groups of chickens comprises a rectangular case 1 Supported on legs 2 and divided into a number of units by fixed partitions 3. Each unit is subdivided into long narrow compartments by detachable partitions 4. Each compartment houses a group of chickens and is divided into day and night chambers 5, 6 by a rotatable partition 7. Wire netting 10 fixed in wooden frames 11 corresponding to the distance between the fixed partitions 3 covers the day chambers and the night compartments are covered by hinged wooden flaps 12. The front is covered by frames 15 corresponding to the frames 11. Curtains 26 of green baize or similar material hang down in front of the sleeping chambers to prevent loss of heat during the daytime, and hot water pipes 25 are fitted. The depth of the case in each unit may be varied by adjusting the joists 17 supporting the floor on blocks 18 or laths. The detachable partitions are removed as the chickens grow.
Patent GB-723737-A (GB)
Title: Improvements in or relating to cyclone furnaces
IPC: F23C3/00
Filed: 1952-04-21
Abstract: 723,737. Cyclone furnaces. BABCOCK & WILCOX, Ltd. April 21, 1952, [April 21, 1951.] No. 34065/53. Divided out of 723,673. Class 51 (1). A cyclone furnace has secondary-air ' ducts 15 which discharge tangentially to the furnace periphery and primaryair and fuel ducts 13 which discharge at an acute angle to the tangent to the periphery, so that the stream of fuel and primary air is directed towards the stream of secondary air at a location displaced along the periphery of the chamber.
Patent GB-1085252-A (GB)
Title: Improvements in or relating to phase setting apparatus for an electric cyclic switching system
IPC: G08G1/085
Filed: 1964-08-20
Abstract: 1,085,252. Road traffic signals. S.G.E. SIGNALS Ltd., and H. J. N. RIDDLE. Sept. 29, 1965 [Aug. 20, 1964], No. 34099/64. Heading G4Q. In a road traffic signalling system clock pulses from a master controller are received at terminal 1 and energize relay A which energizes a drive magnet 25 for a cyclic switch S via its contact A1. Once each cycle a synchronizing pulse from the master controller is received at terminal 2 and energizes relay B; if the switch S is then at its zero position relay B has no effect, but otherwise it causes the switch to advance or retard one position, so that synchronism is eventually established. If the master synchronizing pulse is retarded in the master cycle by the equivalent of 1 to 25 steps, closure of contact B1 'will supply a potential to the contacts of arc S1 thereby energizing a relay L the contact L1 of which prevents one clock pulse from energizing the magnet 25. If the master synchronizing pulse is advanced, the arc S2 energizes relay G the contact G1 of which causes capacitor 27 to charge; at the end of a clock pulse relays A, B and G release, and after a short delay relay D1 releases and allows capacitor 27 to discharge through the magnet 25 thereby stepping the switch on one position.