baber/WOPTO huggingface dataset:
Patent GB-1401632-A (GB)
Title: Device for harvesting headed cabbages
IPC: A01D45/26
Filed: 1972-06-29
Abstract: 1401632 Cabbage harvesters H BLEIN ROTH 29 June 1972 [5 July 1971] 30459/72 Heading A1F To facilitate severing a cabbage's head from its stem, a cabbage harvesting machine has two substantially parallel feed augers 1 and an overlying endless belt 4 whose rotational speeds are synchronised with that of a ground wheel 7 of the machine. The two augers 1 and belt 4 are both driven by a hydraulic motor 5 to which oil is delivered from a pump (not shown) by way of a rotary oil metering device 6 of the fixed abutment, internally meshing, gerotor type which is driven off the ground wheel 7. The augers 1 are subdivided into a rear and a front section 1A which has a smaller pitch than the rear section and the augers plus the belt. 4 are floatingly suspended by a chain 8 so as to be moveable laterally and thereby accommodate deviations from a straight line in a row of cabbages. Towards their rear, the augers have openings 13 to receive a band cutter 14 (as shown) or a reciprocating cutter (not shown). The spacing between the augers 1 is adjustable by devices 15 and means 17 permit vertical adjustment of drive pulleys 18 of the band cutter 14. The endless belt 4 is preferably of the chain, transverse bar type and is tensioned by rollers on spring biased levers 9 and 11.
Patent GB-627693-A (GB)
Title: Improvements in valve modulators
IPC: H04B1/30
Filed: 1945-11-14
Abstract: 627,693. Valve modulating circuits. TILLMAN, J. R. Nov. 14, 1945, No. 30478. [Classes 40 (v) and 40 (vi)] Relates to valve-modulating circuits of the kind employing multi-grid valves, in which a first control grid regulates the cathode current and a second control grid regulates the current reaching the anode; and consists in applying the two inputs respectively to the two control grids and in employing negative feed-back to eliminate one of the two inputs from the anode output. Two such valve circuits may be employed in balanced relation so as to balance out the second input also, leaving only the sum and difference frequencies in the output circuit. In Fig. 1 one frequency p is applied to the inner grid G1 of a pentode valve V1, the other q to the outer grid G3, the output being taken from the anode circuit 12. The cathode lead includes resistances RK, RN which provide negative feed-back to both control grids. The inner grid has a leak resistance R1 connecting it to the junction of RK and RN. The Specification shows that if RK+RN is given a suitable value, the p frequency disappears from the anode current; and that the amplitude of the sideband output is stable despite changes in value parameters and supply voltages. The value of RK+RN may be increased beyond the point of balance of the p frequency, which may then be eliminated by applying the p frequency at a suitable amplitude to the grid G3 (Fig. 3, not shown). Fig. 2 shows a balanced pair of valves V2, V3 with one input frequency applied in push-pull to the inner control grids G1, and the other applied co-phasally to the outer grids G3. Separate control of the feed-back in there spective valves is provided by condensers C2, C3 adjustably tapped on the cathode resistors R2, R3. The output consisting of side-bands only is taken in push-pull from the anodes. If the two valves are not identical, balance may be attained by varying the relative values of the inputs applied. The circuit is applicable to modulation in general, and may also be used for the demodulation of a suppressed-carrier signal by a local carrier source.
Patent GB-702732-A (GB)
Title: Improvements in or relating to detonators
IPC: C06B23/04
Filed: 1952-12-02
Abstract: 702,732. Blasting detonators. DYNAMITAKT.-GES. VORM. A.. NOBEL & CO. Dec. 2, 1952 [Jan. 12, 1952], No. 30553/52. Addition to 687,660. Class 9(1) Detonators according to the parent Specification are modified by incorporating in the secondary explosive charge 1-20 per cent by weight of one or more inert substances selected from the group comprising the polycarboxylic acids and the neutral or acid salts thereof, hydroxypolycarboxylic acids and the neutral or acid salts thereof, halogen-substituted polybasic carboxylic and hydroxy-carboxylic acids and the neutral or acid salts thereof, and the stable carbonates of the organic bases, such as guanidine. One or more inert substances chosen from the group may be used in admixture with one or more of the inert substances referred to in the parent Specification
Patent GB-1532587-A (GB)
Title: Push-pull transmission circuits
IPC: H04L5/14
Filed: 1977-07-21
Abstract: 1532587 Two to four wire converter SIEMENS AG 21 July 1977 [22 July 1976] 30590/77 Heading H4R  In a two-to-four-wire converter a long tailed pair transistor amplifier T1, T2 feeds signals to the line L, a second long tailed pair transistor amplifier T7, T8 receives signals from the line L, and a symmetrical compensation circuit K feeds signals from the transmit amplifier, T1, T2, output to the receive amplifier T7, T8, input, to cancel signals fed to the receive amplifier from the transmit amplifier via the line. The compensation circuit may incorporate a further long tailed pair transistor amplifier T11, T12, to provide a cross coupled compensating signal or resistors (r3), Fig. 4 (not shown) to cross couple the output of the transmit amplifier to the input of the receive amplifier. Emitter followers T5, T6 provide a low impedance output for the transmit amplifier to simplify matching to the line and further emitter followers (T14, T15) can be provided Fig. 4 (not shown) to feed the line signal to the receive amplifier. An arrangement is described using three two-to-fourwire converters to use two two-wire lines as two normal circuits and a phantom.
Patent GB-744532-A (GB)
Title: Improvements in frets or the like for fire grates
IPC: F24B1/193
Filed: 1952-12-03
Abstract: 744,532. Fireplace frets. HEATH, J. E. Dec. 3, 1953, [Dec. 3, 1952], No. 30611/52. Class 126. A fret or like front piece for a fire grate is characterised by the provision of vertical side strips at each vertical side edge which are extendible relative to the fret so as to be adjustable for closing or sealing any clearance that would otherwise occur between the side edges of the fret or the like and the fireplace opening. The fret 1 shown is of box form and each side edge is provided with a vertical strip 2 secured to the fret for sliding movement relative thereto by rivets 3 on a rear part 4 of the fret which slidably engage slots 5 in the strip 2. Each strip is flanged at 6 the flange being adapted to engage behind the fireplace tiling 7. The flanges may be provided with a facing of asbestos 10. Means for controlling the air supply to the space beneath a grate 8 comprises two slidable doors 11 mounted in runners 12 on the rear of a removable plate 13 covering an opening 14 in the front of the fret the plate having two openings 15 that may be closed or partially closed by the doors. If desired only one door 11 and opening 15 may be provided. The channel members 22 are provided on the inner side walls of the fret in order to direct the draught centrally under the fire. The flat top of the fret may act as a utensil support. In an alternative embodiment the strips 2 may be hinged to the vertical edges of the fret.
Patent GB-349885-A (GB)
Title: Improvements in tampons
IPC: A61F13/20
Filed: 1930-10-13
Abstract: 349,885. Tampons ; medical treatment with radiations. DEAKIN, J. E. F., 215, Macquarie Street, Sydney, Australia. Oct. 13, 1930, No. 30631. Convention date, Nov. 8, 1929. [Class 81 (ii).] A vaginal or other tampon comprises a substantially spherical body of soft rubber having segmental shaped pockets produced by a number of diametral partitions. Preferably three partitions 4, at right-angles to one another and having circular peripheries 5 with beaded edges 6, are provided. Medicaments or the like may be placed in the recesses or introduced separately, the edges of the partitions preventing leakage. A string or tapes may be provided for withdrawal. For use with tubes of radium or the like, the partitions may be perforated or partly removed to permit drainage.
Patent GB-1487123-A (GB)
Title: Cyanato-group-containing phenol resin manufacturing process thereof and compositions containing said resin
IPC: C08G8/32
Filed: 1975-07-22
Abstract: 1487123 Cyanato-group containing phenolic resin MITSUBISHI GAS CHEMICAL CO Inc 22 July 1975 [29 July 1974 27 Feb 1975] 30673/75 Heading C3R [Also in Division C2] The invention comprises a cyanato-group containing phenolic resin comprising a mixture of the formula where n is 0 or an integer of 1 or more, each R is H or methyl, containing 50% by weight or more in total of compounds in which n is 1 to 3, the number average molecular weight of the compounds being 350 to 700. The compounds may be prepared by reacting a cyanogen halide in an inert organic solvent in the presence of a base with compounds of the formula containing 50% by weight or more in total of compounds in which n is 1 to 3, the number average molecular weight being at least 300 and less than 600. The compounds may be mixed with a reinforcing material and cured.
Patent GB-975680-A (GB)
Title: Waveguide microwave mixer
IPC: H03D9/06
Filed: 1962-08-10
Abstract: 975,680. Frequency changers. STANDARD TELEPHONES & CABLES Ltd. Aug. 10, 1962 [Aug. 11, 1961], No. 30796/62. Heading H3F. A waveguide microwave mixer comprises a tunable asymmetric input filter 2 followed by a diode mixer 3 in which the filter reflects back into the diode an image wave which is generated during the mixing process, characterized in that the filter 2 acts as an impedance transformer and that an adjustable capacitive screw 8 located at #/4 at the image frequency, behind the output diaphragm 5 of the filter and the filter form a phase shifter which enables for the range of input frequencies, the diode 3 to be presented with that value of impedance at the image frequency to give maximum sensitivity. In Figs. 1 and 2, the energy from the aerial reaches the filter 2 via wave guide 1. The filter 2 comprises two inductive diaphragms 4, 5 and a capacitive screw 6. The local oscillator (not shown), is coupled in known fashion in between the screw 8 and diode 3 and screw 7 is used to adjust the output susceptance of the filter. The intermediate frequency is removed by coaxial means below diode 3.
Patent GB-301380-A (GB)
Title: Improvements in or relating to supervision checking devices for use by watchmen or oter attendants
IPC: G07C1/20
Filed: 1928-10-24
Abstract: 301,380. Detex Watchclock Corporation, (Assignees of Haselton, P. H., and Jenckes, M. A.). Nov. 28, 1927, [Convention date]. Checking watchmen &c.-A key or other control device for operating a watchman's clock is incorporated with mechanism to be supervised and is pivotally mounted within a casing so as to be inaccessible unless the part of the mechanism to be checked is in a desired position. As shown in conjunction with a valve, Fig. 1, the casing 10 has an indicator plate 13 to which is attached a rod 15 the lower end being guided in a slot in the end of a boss 17 on a housing 16 containing the control key 18. The key is pivotally mounted on a shaft 19 and is provided with a cam shaped nose 23 that co-operates with a freely movable rod 21 mounted in the boss 17. The key normally occupies the position shown in Fig. 4 but when the valve is fully open the rod 15 presents a notch 25 therein to the end of the rod 21 so that when the door 27 of the housing 16 is opened by releasing a lock 28 a spring 26, or the weight of the key, allows it to move to the position shown in Fig. 3 the key being then accessible to the watchman who inserts it into the shank 20 of his clock for the purpose of producing the record. The rod 15 may be provided with several notches to permit the use of the watchman's clock under different conditions.
Patent GB-1028887-A (GB)
Title: Improvements in or relating to polyesterimide based varnishes
IPC: C09D5/25
Filed: 1964-08-04
Abstract: A polyesterimide is prepared using pentaerythritol; 2-10% may be used.  The imido link may be present as residues of bis-(4-tri-mellitimidophenyl) methane, bis-(N-hydroxyethyl) or bis-(N-hydroxyproply) pyromellitic diimide.  The first of these may be prepared from 1 mole of bis-(4-aminophenyl) methane and 2-2.2 moles of trimellitic acid or anhydride, the latter two from 1 mole of pyromellitic anhydride and 2-2.1 moles of ethanolamine or propanolamine.  Imide formation at 120-150 DEG  C. may be carried out prior to or simultaneously with polyesterification at up to 200 DEG C.  Both reaction may be in a phenolic solvent, e.g. a cresol.  The eliminated water being removed by fractional distillation.  Other acids and alcohols specified are:  tere- and isophthalic and trimellitic acids, ethylene glycol, propylene glycol, dipentaerythritol and 2,2-bis-(4-hydroxy-ethoxyphenyl) propane. Esterification catalysts specified are butyl titinate and stannous oxalate and a antimony oxide. The product may be used as wire insulation. In examples, cerium and calcium naphthenate are added as driers.
Patent GB-960272-A (GB)
Title: Electric typewriter
IPC: G06F3/09
Filed: 1961-08-28
Abstract: 960,272. Typewriters. C. D'EVELYNES. Aug. 28, 1961 [Sept. 14, 1960], No. 30890/61. Heading B6F. The type-levers of a typewriter are connected, e.g. by wires 80 to bars 31 which are arranged in groups so that energization of a solenoid 41 causes one bar of each group to be projected to the right, and so that energization of another solenoid 61, of which there is one for each group, causes the projected bar of the group associated with that solenoid 61, to be moved downwardly to operate a selected type-lever. As described, there are forty-eight bars 31 arranged side-by-side in six groups of eight each. Correspondingly, there are eight solenoids 41 and six solenoids 61. Each bar 31 is suspended by means of a pivoted link 33 and a retracting spring 37, and has near its left-hand end a side projection such as 36 or 56, Fig. 3, engaged by a trigger 55 which is operated from a solenoid 41 to project the bar. The solenoids 41 are on two horizontal lines of four, those in one line being staggered with respect to those in the other, and the armatures 42 of the solenoids are connected by links 44, 36 to eight shafts 47-54, extending across the entire width of the machine, shafts 47-50 being above the bars 31 and the remainder below. Each shaft carries six triggers 55 so that energization of a solenoid 41 causes one bar 31 of each group of eight to be projected to the position shown in Fig. 2. Associated with each group is a frame 64 pivoted at 67 and comprising two side members connected by a cross-bar 70 and urged upwardly by a spring 71. The armature 62 of each solenoid 61 is connected to one of the frames 64. The right-hand ends of bars 31 when projected lie beneath the cross-bar 70. Energization of a solenoid 61 causes its frame 64 to be pivoted downwardly so that the cross-bar 70 thereof causes the projected bar 31 in the corresponding group to be moved downwardly and thus actuates the type-bar connected thereto. The bars 31 are guided by a comb 76. Depression of a type-key closes simultaneously the circuits of one of the solenoids 41 and one of the solenoids 61 to cause printing of a required type face, and opens the circuits of the remaining solenoids, the solenoids 61 being shunted by condensers to cause them to operate after the solenoids 41. Specification 960,273 is referred to.
Patent GB-447729-A (GB)
Title: Improvements in or relating to gas masks
IPC: A62B18/08
Filed: 1935-11-08
Abstract: 447,729. Gas masks. HUNGARIAN RUBBER GOODS FACTORY, Ltd., 17, Kerepesi-ut, and EHRMANN, C., 5, Lendvay u., both in Budapest. Nov. 8, 1935, No. 30973. Convention date, July 10. [Class 81 (ii)] The sealing of rubber gas-masks to the face is improved by the provision, in a thickened portion on the inside edge thereof, or in a strip secured within the edge, of at least one row of a plurality of depressions. A single row of spaced rectangular depressions may be formed in a thickened edge, or as shown this row, a, may be supplemented by rows b, c of triangular depressions. The edge itself may be thicker on the inner side d than on the outer e. In another construction, several parallel ribs around the inner edges of the mask may be connected by cross ribs, which may be of less height, the higher ribs being preferably tapered toward the top The depressions may be formed in hard rubber, the ribs between them then being only a few millimetres high, or in sponge rubber covered with an air-tight skin, the depressions in this case being deeper. The depressions form suction cups which hold the mask on to the face.
Patent GB-1346745-A (GB)
Title: Infrared radiation source and method of manufacture
IPC: H05B3/00
Filed: 1972-07-03
Abstract: 1346745 Infra-red sources BLOCK ENG Inc 3 July 1972 [6 July 1971] 30987/71 Heading H5N An infra-red source comprises a helically grooved metallic core 10 supporting and in thermal contact with, a conductor 12 formed of a wire having an electrically insulating oxide coating. The wire may be a nickel-chrome alloy and the core may be of chromium alloy steel. The source is assembled by coiling the unoxidized wire on the core unscrewing the core from the coil, recesses 14, and oxidizing the wire surface in a suitable atmosphere by heating the wire electrically to 1000 C. Recesses 14 allow turning members to be inserted in the core to effect the unscrewing. The wire is then rethreaded on to the core, the oxidation process being maintained. The metal core acts as heat ballast.
Patent GB-252317-A (GB)
Title: Improvements in high frequency electric signalling systems
IPC: H04B1/68
Filed: 1925-12-10
Abstract: 252,317. Wired Radio, Inc., (Assignees of Duncan, R. D.). May 19, 1925, [Convention date]. Thermionic generators and modulating systems. - In a high-frequency signalling system, multi-phase oscillations are supplied to the aerial or line wire in a normally-balanced condition, and the modulating current operates on one only of the phases to disturb the balance. The system suppresses the unmodulated carrier wave during both intervals and signalling periods, either wholly or partially. As shown in Fig. 1, the three phases of a generator 1 are applied respectively to the grids of three amplifiers 8 - - 10, the output coils of which are coupled to three series-connected coils 27 - - 29 in the aerial 30 or line wire. Signal currents from a microphone or other source 16 are applied to the grid circuit of the valve 10, and so disturb the normallybalanced condition of the aerial. Modulation may alternatively be effected by the choke method in the plate circuit of one of the valves. Incomplete suppression of the unmodulated carrier wave may be effected by slightly adjusting the couplings of one of the input or output coils.
Patent GB-968023-A (GB)
Title: A filter and apparatus for the observation of optical phase shifting objects
IPC: G02B21/14
Filed: 1960-09-09
Abstract: 968,023. Optical apparatus. COMPAGNIE DE SAINT-GOBAIN. Sept. 9, 1960 [Sept. 9, 1959], No. 31199/60. Heading G2J. A filter for use in the observation of phase shifting objects by the international contrast method, comprises an opaque mask having a transparent zone bounded on one side by that portion of a sinusoidal or like curve which corresponds to the half period of the curve and on the other side by the axis of the curve or by another sinusoidal of the same half-period as the first curve, the two curves being out of phase by 2# radius. The filter may, as shown in Fig. 3, be formed with a number of transparent zones having the same periodicity and it is stated in the Specification that when light from a coherent source passes through such a filter, it is split up into two components which are out of phase, the filter F is disposed in an optical system as shown in Fig. 1. This system consists of a series of parallel slits f illuminated by a lamp L and condenser C, an image of each slit being formed by a lens 01 on the filter. A phase shifting object A to be observed is placed between the lens 01 and the filter f and an image of the object A is formed by another lens 02 on a screen E. The optical axis of the system may intersect the filter f at a point which is asymmetrically disposed with reference to the transverse axis passing through the point of maximum amplitude.
Patent GB-1164271-A (GB)
Title: Improvements relating to Aerial Systems.
Inventor: ROBERTSON DAVID WILLIAM
IPC: G01S13/44
Filed: 1962-08-14
Abstract: 1,164,271. Radio direction-finding. FERRANTI Ltd. 11 Nov., 1963 [14 Aug., 1962], No. 31227/62. Heading H4D. In an airborne radar tracking system, the system axis is aligned with the target by a correcting signal developed from the sum and difference signals derived from the received echoes. Dipoles are mounted on a waveguide which is rotated about its longitudinal axis and the received plane polarized waves are converted to circularly polarized waves to permit their passage through the waveguide rotary joint without mode or amplitude distortion. Reconversion to plane polarization is effected after the rotary joint. The rotatable waveguide is formed at the entry end as two parallel guides each fed from one half of the dish reflector and two orthogonal plane polarized waves are formed representing respectively the vector sum and the vector difference of the echoes. The double guide merges into a single circular crosssection guide provided with capacitive pins which convert the polarization from plane to circular. After passage through the rotary joint, the signals are transmitted through rectangular waveguides to the direction control system.
Patent GB-678546-A (GB)
Title: Improvements in or relating to electron discharge tubes
IPC: H01J29/84
Filed: 1950-12-22
Abstract: 678,546. Cathode-ray tubes. RAULAND CORPORATION. Dec. 22, 1950 [Dec. 23, 1949], No. 31242/50. Class 39 (i). In a cathode-ray ion trap arrangement the anode 27, Fig. 4, is provided with an apertured disc 14 coated with fluorescent material 29 on the side facing the cathode 21 so as to give a visual indication when the beam strikes it, and adjustable magnetic deflecting means are provided for deflecting the beam to pass through the aperture 30 in the disc while the ions are trapped by the anode 27. The luminescent material, preferably zinc silicate activated with manganese, is applied to disc 14 before insertion in the tube by dusting it over a coating of waterglass, a temporary mask being placed over aperture 30 during the process. The inside wall of the anode cylinder adjacent disc 14 may also be coated with luminescent material. Accelerating electrode 26 and anode 27 have oblique facing edges so as to provide an electric field with a transverse component, and the electrons are restored to the axis by means of a magnet 31, a second magnet 32 correcting for any overshooting caused by the magnet 31. Magnets 31, 32 are split spring rings permanently magnetized with diametrically opposite poles, and are mounted on resilient support 33; they may be rotated independently or rotated or moved axially together by movement of support 33, and are normally arranged to give oppositely directed fields. Control electrode 22, accelerating electrode 26 and anode 27 are secured to glass supporting rods 24 by metal lugs 25, 28.