baber/WOPTO huggingface dataset:
Patent GB-613272-A (GB)
Title: Improvements in or relating to lawn mowers and the like
IPC: A01D43/16
Filed: 1946-06-14
Abstract: 613,272. Lawnmower. MACKAY, J. A. June 14, 1946, No. 17954. [Class 6 (ii)] The cutting cylinder 11 is extended outside the main frame 7, the mower being supported at one side by a driving wheel 9 which operates the blades and by front and rear rollers 12 disposed within the cutting width of the blades. The blade spindle 15 is supported by a tube 16 mounted on the side member 7, the blade webs 17a bearing on said tube. A further tube mounted on tube 16 may carry the blade webs. The end of the spindle 15 may have a disc mounted thereon for turf cutting. When trimming a lawn edge a coulter-like blade 23 may be pivotally mounted on the side frame 7 to lift overhanging grass. In a modification the driving wheel is connected directly to the spindle 15 and may comprise a wheel having two circumferential grooves of different diameters to receive a rubber ring which can be fitted over either groove thus varying the height of the cutter from the ground. The wheel may comprise a rubber ring or tyre held between two flanged plates, a butterfly nut enabling the two plates to be tightened, the expansion or contraction of the rubber ring providing a blade height adjustment. The ledger blade 24 may have a serrated or saw-tooth edge.
Patent GB-731058-A (GB)
Title: Air sterilising apparatus
Inventor: GRETTON-LOWE REGINALD
IPC: B67D1/04
Filed: 1952-07-16
Abstract: 731,058. Air compressors. GASKELL & CHAMBERS, Ltd. July 13, 1953 [July 16, 1952], No. 17959/52. Class 8 (1). [Also in Group VI] Air used to pressurise beer or other contaminable liquid in a barrel is heated to destroy bacterial content. The heater comprises a thermally insulated tube t having an electrically heated element, the temperature of which may be controlled by an adjustable resistance. Air is drawn in at each end of the tube and leaves by a connection u at the centre. A pump comprises a chamber a having water supply and discharge connections controlled by a valve d which is operated by a loaded arm g having a quadrant k with abutments m engageable by a pivoted arm i carrying a float j and air is drawn in through a pipe n connected to the heater t at u and passes through the water in the chamber a and is discharged through a non-return valve p and a balancing chamber s. A pressure relief valve v is provided.
Patent GB-427591-A (GB)
Title: Improvements in or relating to looms with stationary weft supplies
IPC: D03D47/46
Filed: 1934-06-18
Abstract: 427,591. Looms with stationary weft supplies. BURROWS, A. R., and BURROWS, V. W., 81, Farquhar Street, Guelph, Ontario, Canada. June 18, 1934, No. 17992. [Class 142 (ii)] In looms employing weft-inserting needles, the interlooping of the weft and the selvedge warp threads is effected by a toothed rotary member 16 which engages a limb of a weft loop, presented at a gap 20, Fig. 4, in a housing 15, and carries it round a selvedge thread 47 passing from a centrally located guide 31 to the fabric. The member 16 is recessed internally to accommodate a selvedge yarn bobbin 22, Fig. 5, which is rotatably mounted on concentric sleeves extending inwardly from the housing wall 24 and a thread guide 25 respectively. The member 25 is provided with thread receiving apertures 28, 29, 30 through which the selvedge yarn is led in its passage from the bobbin to the fabric. A pinion 49 on a shaft 50 passes through a slot 48 in the housing into driving engagement with the toothed member 16, the shaft 50 being rotated intermittently by Geneva wheel mechanism 52 ... 62, Fig. 2, which is operated by chain and sprocket mechanism from the main shaft 61. A graduated movement is given to the weft inserting needle 11 by a longitudinal rack 74, Fig. 2, which has a stud and slot connection with the needle and is reciprocated by adjustable lever connections 73 ... 67 from a crank on the shaft 61. The yarn 33 from the stationary weft supply passes through a thread-tensioning device 37 and thence through a guide 38 to the weft inserting needle.
Patent GB-477374-A (GB)
Title: Improvements in or relating to air or smoke inducers
IPC: F23L17/02
Filed: 1936-06-29
Abstract: 477,374. Chimney &c. cowls. HUNT, J. B. June 29, 1936, No. 18017. [Class 25] In a chimney or ventilating-shaft cowl in which the confronting faces of inner and outer apertured or interrupted walls 1 and 2 define a plurality of Venturi passages 10, the inner faces of the outer wall are convex and the outer faces of the inner wall are concave as viewed from the axis of the cowl. The chimney or shaft communicates through a base 6 with the casing defined by the inner wall 1 and smoke or air is exhausted through slots 8 in the inner wall by the action of the atmospheric air currents passing through the passages 10. The inner casing may be divided by a diaphragm 21 formed with a central aperture from which an open-ended tube 22 extends downwardly into the base 6. A drainage outlet 23 is provided at the base of each passage 10.
Patent GB-458763-A (GB)
Title: Improvements in or relating to scavenge pumps for internal combustion engines
IPC: F02B33/00
Filed: 1935-06-24
Abstract: 458,763. Cross-heads. GARDNER & SONS, Ltd., L., and GARDNER, E. E., Barton Hall Engine Works, Patricroft, Manchester. June 24,1935,No. 18046. [Class 122 (i)] In a scavenge pump for an internal-combustion engine, interconnection of the pump piston rod d and of the connecting rod m upon the engine crank-shaft n is effected by a crosshead i having separate gudgeon pins j, k for the piston rod and connecting rod, the cross-head guide h coming within an extension q of the built-up scavenge pump cylinder g through which access can be had to the gudgeon pins by way of an aperture r in the cross-head guide so that the removal of one or both gudgeon pins can be readily effected. The pin j may be non- circular, or a cotter pin may be employed.
Patent GB-1085887-A (GB)
Title: Process for separation and extraction of metals from aqueous solutions by using alkali metal naphthenates dissolved in non-polar organic solvents
IPC: C01G1/00
Filed: 1965-04-29
Abstract: Metals are extracted from aqueous solutions by means of an alkali metal, e.g. Na, K, naphthenate dissolved in a non-polar organic solvent, e.g. kerosene.  The extraction may be carried out at 40-80 DEG  C. using an excess of up to 50% naphthenate, and the ratio of organic/aqueous phase is varied to extract the metals separately. The metals are re-extracted by treating the organic solution with HCl or H2SO4, in a single stage, or fractionally, and the resulting naphthenic acid is used to form fresh alkali metal naphthenate and recycled.  The initial aqueous solution may be obtained by hydrometallurgical treatment of ores or concentrates, e.g. pyrites ashes.  Fe3+ may be preliminarily extracted with a solution of an alkali metal C7-C9 fatty acid salt in kerosene.  The remaining solution contains Cu, Zn, Na, and some Fe; Cu and Fe3+ are first extracted (then reextracted separately into aqueous phase); Zn and some Cu and Fe are then extracted (then reextracted separately, and the Cu and Fe solution recycled); the alkali metal salt, e.g. Na2SO7, which has accumulated in the primary aqueous solution, can then be recovered, e.g. by atomization.ALSO:A metal naphthenate, e.g. of Cu, Fe or Zn, is obtained by extraction of the metal from an aqueous solution using an alkali metal naphthenate dissolved in a non-polar organic solvent, e.g. kerosene.  The extraction may be carried out at 40-80 DEG  C. using an excess of up to 50% naphthenate, and the ratio of organic/aqueous phase is varied to extract the metals separately.
Patent GB-121321-A (GB)
Title: Improvements in and relating to the Spring Driven Motors of Gramophones and the like Instruments.
Inventor: LEWIS ALFRED
Filed: 1917-12-06
Abstract: 121,321. Lewis, A. Dec. 6, 1917. Driving-mechanism.-Spring motors for gramophones &c. are so arranged that the power transmitted is automatically regulated in accordance with the load. The spindle 11 is driven by a friction disk and roller arrangement 7, 9, and the gearing shown from the spring drum 1, and drives the friction brake 17 and a loose sleeve 10 through a spring 12. The sleeve 10 carries a balancing friction roller 8, and a sliding sleeve 19 carrying the roller 9 is pressed against the sleeve 10, 19 engaging with one another by means of ratchet teeth or cam surfaces 24. Should the load on the spindle 11 vary, the sleeve 10 will rotate at a different speed from the sleeve 19, and the roller 9 will be moved by the cam surfaces 24 along its shaft so as to engage with a different part of the driving-disk 7.
Patent GB-421424-A (GB)
Title: Improvements in, and relating to, metal cores for use in the manufacture of hollow drill steel, tubes and other hollow bodies
IPC: C22C38/40
Filed: 1933-06-24
Abstract: 421,424. Cores for use in making hollow bars &c. GORDON, F. F., Osgathorpe House, Osgathorpe Road, Sheffield. June 24, 1933, No. 18093. [Classes 83 (i), 83 (ii), and 83 (iv)] Making cased forms, rods and bars, pipes; casting.-In a metal core for use in reducing hollow blanks into drill steel, tubes, &c. in which the metal thereof adjacent to or in contact with the wall of the hole in the blank does not occupy the whole of the cross-sectional area of the hole, such metal consists of austenitic steel such as manganese steel, high manganese nickel steel, high chromium nickel steel or high chromium manganese nickel steel. The core may be hollow with or without a refractory inner core or may consist of a composite tube or a composite solid bar. A composite tubular core may be made by forming an ingot by casting austenitic steel round an iron or steel tube, then reducing into a billet and subsequently into a core or directly into a core. In another form austenitic steel is cast round a tube packed with sand and the sand removed after the billet has been reduced to form the core. A tube for use as a core may also be produced by casting austenitic steel round a sand core. In a further form, austenitic steel is cast round an iron or steel bar, which is preferably pre-heated, and the ingot thus formed is reduced to form the core. The core may also be formed by wrapping a sheet of austenitic steel round a bar or tube of iron or steel or non-ferrous metal. According to the Provisional Specification other alloys or non-ferrous metals may be used instead of austenitic steel.
Patent GB-641785-A (GB)
Title: Improvements in or relating to electric follow-up control systems
IPC: G05D3/12
Filed: 1946-06-17
Abstract: 641,785. Electric follow-up systems. RAYTHEON MANUFACTURING CO. June 17, 1946, No. 18117. Convention date, June 18, 1945. [Class 40 (i)] In a follow-up system wherein the errorvoltage is thermionically amplified, a time lag circuit is provided across the anode-grid of the amplifying tube for limiting the abruptness of rate-of-change of error voltage, the time-lag circuit reactively coupling the anode and grid in a negative feed-back fashion. The invention is described as applied to the follow-up system shown in Specification 617,918 and consists in providing resistor-capacitor combinations 74, 76 and 75, 77 across the aiiode-grid circuits of the amplifying valves 25, 26 of that system to produce a time lag in the amplifier response. This arrangement obviates hunting in the case where the gear ratio between the load and the Selsyn receiver is increased to reduce the dynamic and static errors of the system.
Patent GB-1334171-A (GB)
Title: Circuit breakers
IPC: H01H33/59
Filed: 1971-05-28
Abstract: 1334171 Arcing preventing in switches HUGHES AIRCRAFT CO 28 May 1971 [10 June 1970] 18169/71 Heading H1N A D.C. circuit interrupting arrangement coprises the parallel combination of main contacts 24, an electronic switch 40, first auxiliary contacts 42 with resistor 44, second auxiliary contacts 46 with resistor 48, and a capacitor 52 across the contacts 46. Control means (not shown) cause the consecutive opening of the contacts 24, 42, 46, the opening of each set of contacts being accompanied by the conduction of the electronic switch 40 so that the contacts are short-circuited and the gap between them can de-ionize, the conduction of the switch 40 being terminated in each case by the control means. The restrictors 44, 48 may be non-linear resistors and the capacitor 52 is of the oil filled kind and capable of arresting the final voltage surge. The electronic switch 40 may be a crossed field switching device or liquid metal cathode switching device as described in Specification 1,243,655.
Patent GB-235740-A (GB)
Title: Improvements in and in connection with suit-cases, trunks, and the like
IPC: A45C5/00
Filed: 1924-07-30
Abstract: 235,740. Marks, E. C. R., (Mark Cross Co.). July 30, 1924. Partitioned trunks and cases; knock-down cases. -Relates to trays for suit cases, trunks, &c. adapted when folded and removed to form independent cases. The tray comprises elements 3 to 7, Fig. 2, hinged together, and adapted to be supported on a ledge 2 in a trunk &c., the edge of end section 3 being engaged under retaining pieces 11 and at the other end the edge of section 7 engaging under a spring tongue 13. When part 7 is released from the tongue the tray can be partially folded to afford access to the contents underneath. Sections 3, 5 and 7 have upstanding edge elements which co-operate to form the ends when the tray is folded to constitute a separate case as shown in Fig. 4.
Patent GB-681603-A (GB)
Title: Improvements in and relating to pre-cast concrete articles
IPC: C04B41/00
Filed: 1949-07-11
Abstract: Hardened, cured, precast solid concrete is dry heated at 100 DEG  to 300 DEG  C to eliminate or reduce dimensional changes on wetting or drying when in use.  The heating varies between 4 and 24 hours.
Patent GB-244360-A (GB)
Title: Improvements in apparatus for producing a photographic record of light variations corresponding to sound waves
IPC: G11B7/00
Filed: 1925-07-17
Abstract: 244,360. Case, T. W. July 17, 1925. Optical apparatus; electric circuit applications.-Relates to apparatus for making sound records photographically (particularly " talking moving pictures ") of the kind in which a vacuum discharge lamp is employed with means for varying the light emitted in accordance with the sound to be recorded. According to the invention, the current source which maintains the cathode glow in the lamp is shunted by a condenser, so as to bypass the sound-modulated current around the source. The Figure shows an arrangement in which two stages of amplification are employed between the microphone 1 and the lamp 30, the first stage involving a single valve 8 coupled to the microphone circuit by a transformer 4, and the second stage including two valves 14, 23, connected to transformers 12, 25 as shown in such a way that the circuits are substantially balanced. A condenser 39, which characterizes the invention, is connected across the battery 38 which supplies the lamp 30. The lamp acts upon a photographic film 36 in the usual way. A high resistance 40 is preferably arranged in shunt with the secondary of the transformer 25, and a condenser 42 and choke coil 41 may also be arranged as shown. In an alternative circuit arrangement, two valves only are employed, the second being coupled to the first through a transformer, and the lamp being inserted directly in the plate circuit of the second valve.
Patent GB-286952-A (GB)
Title: Apparatus for preparing tobacco leaves
IPC: A24B5/08
Filed: 1927-07-09
Abstract: 286,952. Muller, J. C. May 19, 1927. [Convention date]. Addition to 277,931. Tobacco.-In an apparatus for reducing the mid-rib of tobacco leaves to approximately the thickness of the leaf without dividing the leaf, the reduction is effected by a rotating circular disc cutter 14. The rib part of the leaf adjacent to the cutter rests on a raised portion 12 of the supporting roller 4 and is tensioned by means of cords 8 running in grooves 13. The cords 8 run over rollers 9, 10, 11, 3, 4, 5, the roller 5 being mounted on a bell-crank 19 actuated by a spring 21, so that the roller 5 adapts itself to varying thicknesses of rib. The leaf is supported on each side of the enlargement 12 by belts 1 running over rollers 2 - - 7, the roller 2 being carried by a lever 22 pivoted at 23 on the bellcrank 19, to which it is connected by a spring 24. In order to straighten out any longitudinal cavity under the stem of the leaf so that the leaf shall not be severed into two parts, the leaf is sharply flexed by the roller 3. The ribs shaved off pass on to a stripper 18. In a modification, the supporting roller 4 is conically tapered at each side of the central portion.
Patent GB-562482-A (GB)
Title: Improvements in or relating to electric amplifier and like circuits
IPC: H03G7/02
Filed: 1942-12-28
Abstract: 562,482. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Dec. 28, 1942, No. 18398. Convention date, Dec. 27, 1941. [Class 40 (v)] The ratio of peak input voltage to peak output voltage is maintained constant in an amplifying system including a non-linear element, e.g. a contrast amplifier for gamma control in television, for controlling the gain in the channel in a non-linear manner. For this purpose energy in accordance with the difference between peak voltages derived from the input and the output after appropriate linear amplification are fed to a variable gain amplifier included in the channel. The Figure shows a contrast control amplifier 7 and an A.V.C. amplifier 9 and a video amplifier 11 with part of the input and output voltages respectively fed to amplifiers 15, 27 connected to bridge rectifiers 23, 35 so poled that the difference voltage is applied to an amplifier 47 controlling the bias voltage applied to amplifier 9. The time constants of the networks 39, 41 and 43, 45 are such that the change takes place over one or two frames to avoid abrupt change in picture brightness. Resistance 45 is arranged to be much larger than resistance 41 so that when the rectifier 37 draws current it does not appreciably affect the potential across the impedances 39, 41. The circuits are preferably so arranged that balance is effected when the voltage fed to the amplifier 7 is equal to the output of the amplifier 11.
Patent GB-1339948-A (GB)
Title: Wire elements
IPC: B21J13/02
Filed: 1971-06-02
Abstract: 1339948 Making slurry screens; forging HENDRICK MFG CO 2 June 1971 [19 June 1970] 18546/71 Headings B3A and B3H [Also in Divisions B1-B2] A triangular cross-section wire 14a with one angle 18a, Fig. 5 more rounded than the others is coined in a die assembly to shape the rounded angle into a sharper angle 186, Fig. 7, and to sharpen the angle 16a to form an angle 16b of the same size as the angle 18b. The initial wire 14a is formed from circular cross-section wire in a similar or the same die assembly. The wire is reorientated between the initial forming and the coining. The upper die 52, Fig. 3, does not completely close against the lower dies 28, 30, so that the uppermost angle 18a is not die formed whereas the lower dies 28, 30 are closely fitted to form the lowermost angle 16a. The partly formed angle 18a is positioned between the lower dies of the similar or same die assembly for the coining operation. The wire has spaced loops 12 and the overlapped zones 15b are compressed during the initial shaping. The die assembly has opposed recesses to receive the loops which are not compressed, the die assembly is mounted in a knuckle joint press, Fig. 1 (not shown), which has a pair of die assemblies (28), (30), (52) and (26), (30), (50) so that the wire can be initially shaped in one assembly and coined in the other. Two wires are shaped simultaneously and changed over for simultaneous coining. Each die assemblies operates on one wire length between the loops at a time. The loops are positioned by pins (72). The upper dies (50), (52) are on a lower plate (62) of a double platen (62), (68) whose plates are spring- biased apart (70). The lower dies (26), (28), (30) are held on a fixed lower platen by a wedge block (40) and a fixed block (36). The coined wires are assembled parallel to each other with their shortest faces upwards to form a slurry cross flow screen.
Patent GB-1191448-A (GB)
Title: Stabilised alpha-Azidocarbonyl Compounds.
Inventor: SCHUBEL HANS
Filed: 1969-04-10
Abstract: 1,191,448. Stabilized azidocarbonyl compounds. DYNAMIT NOBEL A.G. 10 April, 1969 [10 April, 1968], No. 18555/69. Heading C2C. The invention comprises an α-azidocarbonyl compound in association with a stabilizer therefor, the stabilizer being a compound which is capable of forming a chelate with a metal ion, in an amount of not less than 0À01% by weight based on the weight of the α-azidocarbonyl compound. Suitable compounds for use as stabilizers are carboxylic acids containing an amino, imino, nitrilo, OH or keto group; diketones, phenols and heterocyclic compounds. Examples are given in which α-azidophenylacetic acid is stabilized.
Patent GB-707420-A (GB)
Title: Improvements in and relating to thermo-propulsive ducts for aircraft propulsion
IPC: F02K7/10
Filed: 1951-08-07
Abstract: 707,420. Jet propulsion plant. LEDUC, R. Aug. 7, 1951 [Aug. 5, 1950], No. 18564/51. Class 110(3) [Also in Group XII] A thermopropulsion duct has means for creating in the fluid flow immediately upstream of the heating zone a vortex sheet disposed obliquely to the axis of the duct so that the fluid flow is deflected in passing through the vortex sheet and. the effective cross-sectional area of the fluid stream in the heating zone is increased above that of the zone upstream of the vortex sheet. A vortex sheet is stated to be a laminar region generally transverse to the streamlines in which the circulation is not zero and may be created by deflecting blading, injection of fluid into the stream or by suction. In the propulsive duct shown air approaches a heating zone 3 with a velocity V, which makes an angle a with a vortex sheet 1. After crossing the vortex sheet the air has a lower velocity V 2  making an angle # with the vortex sheet 1. After leaving the heating zone 3 the gases may pass across a second vortex sheet 2 and leave with a velocity V, parallel with velocity V 1 . The angles α and # need not be constant along the length of the vortex sheet and may tend to zero in the vicinity of the duct wall. When a cascade of blades 5, Fig. 4, is used to form the vortex sheet, partitions 12 forming extensions of the blades may be connected by turbulence creating vanes 8 carrying on their trailing edges fuel burners 7. The partitions 12 and vanes 8 together form a number of combustion chambers 13, 14 staggered with respect to each other. In a modification, partitions may be arranged between the blades forming the cascades upstream and downstream of the heating zone so as to divide this zone into a number of small zones. The blades downstream of the heating zone may be hollow and cooled.
Patent GB-405036-A (GB)
Title: A new or improved control for self-propelled vehicles
IPC: B60K20/02
Filed: 1932-07-01
Abstract: 405,036. Ball joints. HAMILL, W. W., Beechcroft, Four Oaks Road, Four Oaks, Warwickshire, SCOTT, R. E., Wolmer View, Whitehill, Borden, Hampshire, and KITCHENHAM, S., 17, Michelham Gardens, Strawberry Hill, Middlesex. July 1, 1932, No. 18605. [Class 65 (ii).] A change-speed gear lever is provided with spring means holding the ball on the lever in contact with a divided embracing seating so as to take up wear. In Fig. 1 the spring 6 is situated between the two parts into which the ball is divided, the lower part being secured at 4 to the lever. In a modification, the upper part is formed with a depending sleeve embracing the lever. In another modification, the sides of the ball are reduced to provide a cavity for lubricant. In Fig. 4, the springs 20 press the upper part of the seating, guided by pins 19, on to the ball which is made in one piece. Reference has been directed by the Comptroller to Specifications 231,715, 270,545, [both in Class 65 (ii), Hinges &c.], and 319,262, [Class 80 (ii), Gearing, Variable-speed &c.].