baber/WOPTO huggingface dataset:
Patent GB-925125-A (GB)
Title: Motor speed control arrangement
IPC: G05D9/12
Filed: 1961-08-29
Abstract: 925,125. Controllers. C. E. RYDEN. Aug. 29, 1961, No. 31089/61. Class 38 (3). An arrangement for controlling the speed of a motor in response to variations in the head of a liquid, in particular a motor driving a pump for the liquid, comprises a liquid resistance having a pair of side-by-side electrolyte chambers connected at their lower portions, one of the chambers being sealed and the other vented, a plurality of electrodes in one of the chambers, air being supplied to the sealed chamber so that variations of air pressure due to change of head cause changes of electrolyte level so as to vary the immersion of the electrodes and consequently the amount of resistance in circuit with the motor. In one form applied to a motor 22 driving a pump 12 removing sewage from a sump 10, air from a source 47 is bubbled into the liquid via a pipe 42 and the air pressure, which depends on the head h 1 , is also applied to the sealed electrolyte chamber 28. The electrolyte level in this chamber alters until the difference h 2  between the levels in chambers 26, 28 is equal to h 1 , thereby varying the motor speed. In a modification, Fig. 3 (not shown), air to chamber 28 is controlled by a valve responsive to the head in the sump, whereby the head h 2  may be proportional to h 1 . Similar arrangements may be used with a water supply system, the pressure on the outgoing side of the pump being the determining factor, and in one of these arrangements the electrodes are disposed in the sealed electrolyte chamber.
Patent GB-456787-A (GB)
Title: Improvements in or relating to suction cleaners
IPC: A47L5/30
Filed: 1935-11-09
Abstract: 456,787. Suction cleaners. AIR-WAY ELECTRIC APPLIANCE CORPORATION, 2101, Auburn Avenue, Toledo, Ohio, U.S.A. Nov. 9, 1935, No. 31092. Convention date, Nov. 9, 1934. [Classes 8 (i) and 8 (ii)] The rotary agitator of a vacuum cleaner comprises rubber &c. strips 71 extending radially or tangentially to the hub and shod with metal, and is driven by an independent electric motor 28, e.g. a variable-speed motor mounted directly on the suction head ; it may comprise also bristles 70 in addition to the beaters. The agitator driving belt is located in a housing separate from the motor housing, an air inlet being provided to keep the belt clean. The floor tool has a swivelling connection with the suction pipe 15, stops limiting the amount of rotation, to prevent strain on the electric conductor 110 which passes from the fan motor housing 10 around the suction pipe. The supporting wheels of the nozzle are mounted on pins of a crankshaft adjustable by a lever to control the height from the floor. The dust bag comprises an inner bag 114 of rough crÛped paper within an outer bag of impervious material pierced with perforations, and having an upper open mouth ; the portion of the inner bag exposed at this mouth may be covered by a flap of impermeable material. Rubber bumpers 135, 140 are provided on the nozzle lips and on the agitator motor ; the bumpers 135 are secured by screws and washer inserts.
Patent GB-432671-A (GB)
Title: Improvements in or relating to coats and like outer garments
IPC: A41D19/00
Filed: 1934-10-31
Abstract: 432,671. Coats, gloves, &c. STONE, M., 154, Cheetham Hill Road, Manchester. Oct. 31, 1934, No. 31180. [Class 141] A coat or like outer garment has a glove or mitten c secured to the inside of the sleeve either permanently as by stitching or detachably as by buttons or press fasteners. The glove or mitten can be turned up and secured to the outer face of the sleeve as a decoration, e.g. by a button h and loop i, press fasteners or a strap j under which the glove is tucked. The upper edge of the glove may be turned in under the turn-in f of the sleeve and secured by the usual stitching e. The edge stitching of the glove may terminate short of the top to leave a flap to facilitate entry of the hand. The front part of the glove may be joined to the sleeve by a strap, buttons, &c.
Patent GB-967977-A (GB)
Title: A zoom lens, more particularly for miniature still cameras
IPC: G02B15/14
Filed: 1962-08-14
Abstract: 967,977. Zoom lenses. NIPPON KOGAKU K. K. Aug. 14, 1962 [Aug. 15, 1961 ], No. 31200/62. Heading G2J. The lens comprises a fixed divergent member between two convergent members which are movable by different amounts to vary the magnification while maintaining the image position fixed. As shown, the front member is a simple convex lens, the divergent member is made up of two air -spaced simple lenses and the near convergent member is constituted by four simple lenses. In this objective, when N is the number of elements in the divergent member and is not more than 3, f 1  f 2  and f 3  being the respective focal lengths of the three members and the other symbols denote radii as shown.
Patent GB-1485233-A (GB)
Title: Thread-rolling head
IPC: B21H3/04
Filed: 1975-07-25
Abstract: 1485233 Rolling threads H HABEGGER 25 July 1975 [6 Aug 1974] 31220/75 Heading B3M A thread rolling head, which is fed axially along a rotating workpiece, includes a support 1 in which the stem 2a of a bearing member 2 is held by a relatively weak spring 25, the member having three spaced bores in which roller supporting bodies 4 are held by an annular spring 21, each of the bodies having a curved portion 4b which acts against an inwardly facing cam surface 18, Fig. 2, formed on a cylindrical casing 3. The angular position of the casing 3 is adjustable relative to the support 1 by a bolt 14 which engages a slot in the casing 3 and is mounted on a plate 9 adjustable by two screws 13. When the axial feed of the head is stopped during a rolling operation, the threads on the workpiece draw the rollers 5, and hence the bearing member 2, away from the support 1. This causes disengagement of stop surfaces 8 between the member 2 and support 1, which results in the spring 25 rotating the member 2, the rotation being helped by the continuing torque exerted by the workpiece on the member 2 through the rollers. The curved portions 4b of the roller supporting bodies 4 move along the cam surface 18 to retract the rollers from the workpiece. The rollers can be reset to their operative positions by pivoting a handle 26 attached to the member 2.
Patent GB-1103429-A (GB)
Title: Magnetic recording and reproducing head
IPC: G11B5/245
Filed: 1965-07-22
Abstract: 1,103,429. Magnetic heads. ROSEMOUNT ENGINEERING CO. 22 July, 1965 [10 Aug., 1964], No. 31344/65. Heading G5R. The gap in a magnetic transducer core is filled with a first material having a low permeability and a second material having a permeability intermediate that of the first material, and that of the core.
Patent GB-380291-A (GB)
Title: Improvements in the method of and apparatus for applying batching solution to fibre such as jute
IPC: D06B1/02
Filed: 1931-11-12
Abstract: <PICT:0380291/IV/1> Fibres such as jute are passed from a conveyer 1 between rollers 2, 3 and fall in curtain formation through a chamber 4 in which they are impregnated by a batching solution from nozzles 5, through which the solution is directed under pressure in a finely atomized condition on to the fibres.  The sprayed fibres pass to discharge rollers 6, 7 and a conveyer 8 which carries them to the softeners for further treatment.  Steam, air or hydraulic pressure may be used for atomizing the liquid.
Patent GB-1471200-A (GB)
Title: Microwave oven
IPC: H05B6/68
Filed: 1974-07-16
Abstract: 1471200 Supply circuits for microwave ovens MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 16 July 1974 [18 July 1973 20 Feb 1974] 31510/74 Heading H2H A microwave oven comprises a magnetron 235, a high voltage transformer 224 having its secondary winding connected to the magnetron, a triac 219 connected to the primary winding of the transformer and a circuit 220 for controlling the firing of the triac. The oven door 12 controls switches 27, 214, 223 and when a knob 19 is operated to close a switch 24, power is supplied to a timer motor 213 provided a " start cooking " button 17 has been pressed to close a switch 211 which energizes a relay 210 and closes a switch 212. A select switch 111 closes a switch 218 to short circuit the triac 219 and opens a switch 221 to prevent the supply of power to the circuit 220. The cooking period is set on a scale 18 and the oven also includes an interior light 25, a fan motor 26, a stirrer motor 28 and a thermal switch 29 which opens if the magnetron overheats. During cooking full power is supplied to the oven, however, if it is required to initially de-freeze food, the select switch 111 is operated to open the switch 218 and close the switch 221. The circuit 220, which comprises thyristors or transistors coupled as an astable multivibrator, is energized and intermittently switches on the triac to reduce the power output of the magnetron, the triac being fired at the 80-degree or 280-degree point of the A.C. supply waveform to prevent surge currents.
Patent GB-1240923-A (GB)
Title: A device for controlling a hydraulic pressure producing ratio-shift in an automatic transmission of an automotive vehicle
IPC: F16H59/16
Filed: 1969-06-23
Abstract: 1,240,923. Change-speed control. NISSAN MOTOR CO. Ltd. 23 June, 1969 [18 Sept., 1968], No. 31586/69. Heading F2D. In a torque-responsive automatic hydraulic control of a torque-converter-driven transmission on a motor-vehicle, the torque factor is obtained by direct dynamometric measurement of the torque applied by the converter-turbine to the transmission input. Four embodiments are described all employing the torsional yield of an inner shaft 18 in the converter-transmission drive to produce axial movement of a sleeve, e.g. 39, acting through a lever 42 and spring 48 on a valve 47 throttling the delivery of an oilpump 51. In the first two embodiments the torqueconverter is on a parallel shaft driving through an idler 16 a gear wheel 17 driving the outer splined end of the inner torsion shaft 18 which is integral with the transmission input. In the first embodiment, Figs. 2 and 4, the gearwheel 17 carries a splined flange 27 having V- shaped facial projections 31 engaging complementary recesses in an axially slidable sleeve 35 splined to the inner end of the torsion shaft 18, so that circumferential yield of the latter under torque in either direction moves the sleeve 35 axially left to act through a bearing 41 and non- rotatable slidable sleeve 39 on the valve-control lever 42. In the second embodiment, Figs. 10, 11, not shown, the lever 42 has segmental teeth meshing a rotatable pinion (64) attached to a cam (66) which acts on the control valve with any desired characteristic (Fig. 12, not shown). In the third embodiment, Figs. 13A, 13B, not shown, the torque-converter is concentric with the torsion shaft (86) and transmission input, and a single axially movable sleeve (94), directly cammed by the turbine hub (85) actuates the control-valve through a lever of the second order. In the fourth embodiment, Figs. 15,-21 not shown, the arrangement is the same as in Fig. 2, but the camming projections are replaced by three-armed levers (112) pivoted on radial pins (111) on the gear-wheel (110), one arm engaging a recess, in the slidable sleeve (122), the other two, aligned. but perpendicular to the first arm, bearing on the face of the sleeve to produce axial movement by lever action under torsional yield in either direction.
Patent GB-799261-A (GB)
Title: Improvements in or relating to moulding apparatus for use in making electric condensers
IPC: B29C70/72
Filed: 1955-02-23
Abstract: 799,261. Moulds for making electric condensers. RADIO MATERIALS CORPORATION. Feb. 23, 1955 [April 5, 1954], No. 31587/56. Divided out of 799,260. Class 87(2). A gang mould for making a number of electric condensers simultaneously comprises a number of mould sections 18, Fig. 4, which are clamped together in a frame 19 by means of a screw 21. The contiguous faces of adjacent sections are hollowed out and co-operate to form moulding cavities 18a, Fig. 5, within each of which a central dielectric part 10 of a condenser is frictionally supported by means of terminals 11. The outer parts of the terminals are accommodated in grooves 18g in the mould sections, and terminal bosses 11b lie inside the cavities, spring tongues 11c holding the parts 10. Tongues and grooves 18c, 18d align the sections. Funnels 18b are formed in abutting mould sections for admission of liquid plastic material, which is poured into the cavities to form sheaths on parts 10 and unite the terminals to the latter. The sections are temporarily supported on an inclined base 24 for assembly purposes. Specification 799,262 is referred to.
Patent GB-699821-A (GB)
Title: Process for the preparation of 1-phenyl-2-amino-1:3-propandiol-1-ethers substituted or unsubstituted in the phenyl-group and of their derivatives
Filed: 1950-12-29
Abstract: 1 - Phenyl - 2 - amino - 1:3 - propandiols and their 1-ethers and N-dihaloacetylamino derivatives are manufactured from compounds of the general formula <FORM:0699821/IV (b)/1> (wherein R1 and R2 represent alkyl, cycloalkyl or aralkyl residues and X represents hydrogen or a nitro group) by reducing the group -COOR2 to -CH2OH by means of a complex metal hydride, then, if desired, splitting off the group R1 (preferably by acid hydrolysis), and finally, if desired, treating the resulting aminodiol (which may first be resolved into its optically active isomers) with a trihaloacetaldehyde or its hydrate and simultaneously or subsequently with an alkali metal cyanide.  Suitable reducing agents are sodium or lithium aluminium hydride, or (especially when X is a nitro group) an alkali metal (e.g. sodium or lithium) borohydride.  When the starting material does not contain a nitro group, this may be introduced, according to a modification of the process, by nitration (preferably with concentrated nitric acid) after the reduction step and after acylation of the -CH2OH group formed thereby and of the amino group (e.g. by the action of an acid anhydride such as acetic, propionic or benzoic anhydride), the acyl groups being subsequently split off, preferably at the same time as the residue R1).  In an example, DL - threo - 2 - phenyl - 2 - methoxyalanine ethyl ester is liberated from its hydrochloride by means of methanolic sodium methoxide and reduced with lithium aluminium hydrate to DL - threo - 1 - phenyl - 1 - methoxy - 2 - aminopropan - 3 - ol (the p - nitrobenzoyl derivative of which is described); the methyl group may then be split off by the action of concentrated hydrobromic acid, or the amino and hydroxy groups may be acetylated with acetic anhydride and pyridine and the phenyl group nitrated prior to hydrolysis to DL-threo-1-p-nitrophenyl-2-aminopropan - 1 : 3 - diol; this last compound or its L-component may be treated with chloral in dioxane and the product with sodium cyanide in methanol and dioxane to yield DL-or L - threo - 1 - p - nitrophenyl - 2 - dichloracetylaminopropan - 1 : 3 - diol.  Other starting materials specified are DL-threo-b -phenyl-b -methoxy - a  - aminopropionic acid methyl ester, and b  - p - nitrophenyl - b  - alkoxy - a  - aminopropionic acid esters such as the ethyl ester of the DL-threo-2-methoxy-acid.  Specifications 699,819 and 699,820 are referred to.  b  - Phenyl - b  - alkoxyalanine esters of the general formula above (R1=alkyl) are obtainable by esterification of the corresponding acids, e.g. by reaction with an alcohol in the presence of an acid catalyst such as hydrochloric or sulphuric acid.  In an example, dry hydrogen chloride is passed into a boiling solution of DL - threo - b  - methoxy - b  - phenyl - a  - aminopropionic acid in ethyl alcohol to produce the ethyl ester hydrochloride.
Patent GB-656141-A (GB)
Title: Improvements in metallurgy
IPC: C22B3/08
Filed: 1947-12-01
Abstract: The method of recovering, from matte containing iron sulphide, an element present in the matte whose sulphide is soluble in aqueous sulphuric acid, comprises subjecting the matte to repeated treatments with aqueous sulphuric acid in a countercurrent system including a series of at least four receptacles and forming residues in each successive receptacle including diminishing proportions of iron sulphide, employing the acid solution initially to treat residue containing a relatively small proportion of iron sulphide and consisting largely of sulphides of metals other than iron, thereafter to treat residue containing relatively larger proportions of iron sulphide and, ultimately, to treat raw matte and thus forming a solution in successive receptacles comprising progressively diminishing amounts of acid and progressively increasing amounts of ferrous sulphate, and controlling the acid treatment to produce (1) a substantially neutral solution of ferrous sulphate from the first receptacle, (2) a solid product of sulphides of cobalt, copper, gold, nickel, platinum, silver, zinc from another receptacle, (3) hydrogen sulphide.  The zinc may be recovered in part as zinc sulphate by crystallization from an intermediate receptacle.  The matte, obtained by smelting iron sulphide ore, is finely divided and treated with acid at 50-70 DEG  C.  Specifications 566,375 and 656,143 are referred to.  Reference has been directed by the Comptroller to Specification 566,375.
Patent GB-604536-A (GB)
Title: Improvements in electrolytic cells
IPC: C25B9/17
Filed: 1945-11-26
Abstract: 604,536. Electrolytic cells. MERCER, J. P., and E.C.D., Ltd. Nov. 26, 1945, No. 31850. [Class 41] A container for an electrolytic cell, e.g. for the electrolysis of brine, shown in sectional elevation in Fig. 1 and in plan in Fig. 3, is built up of two end sections b, and, if desired, a series, say 25, of intermediate frame sections a separated by gaskets c and held together by bolts. Electrodes d consisting of slabs of graphite or the like are mounted in the frames, having their active faces flush with the vertical jointing faces of the frames so that the thickness of the interposed gaskets c determines the gaps between the electrodes. In the form shown, the sections are shaped with channels a<1> having shoulders to support the electrodes d, weirs a<3> and overflow channels a2. The frames may be of ebonite, the end sections being recessed for double thickness electrodes. The gaskets are cut from rubber sheet about <1>/16 inch thick and are substantially the same shape as the frames a, but may overlap the electrodes partly to hold them in position. In a modification, the electrodes are dovetailed into the frames. The electrical connections are made to the thick end electrodes which provide screw sockets d<1> for the contact plugs e which are introduced through glands e<1> on the end walls. The contact plugs are of hard graphite impregnated with resin to prevent porosity. Brine is supplied by a pipe f to the channel a<1> and the products are removed by a pipe g, both pipes being at the " earth " end of the cell. A cover having a hydrogen outlet may be fitted. In a modification the frames a are extended to the right and provided with duplicate cavities as a', a<2> so as to form a double cell. In a further modification, a cell built up of frames is bolted to the side of a reservoir tank provided with upper and lower sets of slits registering with gaps in the gaskets between the frames for circulation of electrolyte through the inter-electrode spaces. The electrical supply may be taken from a full-wave rectifier having a neutral connection in the case of the double cell.
Patent GB-850827-A (GB)
Title: Improvements in or relating to very high frequency electron discharge tubes
Inventor: RUGGLES PERCY CHARLES
IPC: H01P1/08
Filed: 1957-10-14
Abstract: 850,827. Velocity modulated tubes. ENGLISH ELECTRIC VALVE CO. Ltd. July 15, 1958 [Oct. 14, 1957], No. 31992/57. Class 39(1). A klystron has an output device comprising a coupling hole 33, Fig. 4, in a resonator body a length of thin walled waveguide 4 and a window 7 and window frame structure 11 sealed to the guide with the window 7 closely adjacent to the coupling hole and the structure 11 being sealed to the interior of the waveguide along a line on the side of structure 11 remote from the resonator body. The window is of glass mica or ceramic. The window frame 11 and interposed plate 9, Fig. 4, one of Ni-Co-Fe alloy and in assembly waveguide section 4 together with plate 9 are brazed to the resonator block with an -Ag alloy, and plate 11 which is milled off flat where it abuts plate 9 with window 7 sealed thereto, (window 7 may be of " Kodial " glass) is brazed with Cu-Ag alloy 12 to the waveguide by eddy current heating of flat coil 3. Waveguide 4 may be of Ni, Ni-Fe or Ni-Co-Fe alloy. In the modification of Fig. 8 the waveguide 4 is brazed to resonator block 1 and the frame 11 carrying the window 7 is mounted in the waveguide 14 which fits into waveguide section 4 and members 4, 14 are sealed by brazing with Co Ag alloy as before. A wire gasket 15 of silver is cold welded on both sides to resonator block 2 and window frame 11. The coupling apertures in the plates are the same size as or slightly larger than the resonator hole. In a prior art klystron, Fig. 1, a copper plated Ni-Fe block or a solid block of copper forming the output resonator is provided with a section of guide 4 which is brazed by eddy current heating to guide section 5 after the section 5 and plate 6 holding the window have been assembled. A further guide section is attached to 6 with the interposition of a cavity resonator which is turnable to tune by pulling the frequency of the main resonator. An oxidising atmosphere is required for sealing the window.
Patent GB-466027-A (GB)
Title: Improvements in the manufacture of artificial textile materials, foils, films and the like
IPC: D01F2/28
Filed: 1935-11-19
Abstract: Filaments, foils, and the like of organic derivatives of cellulose are stretched in steam or hot water at a temperature of at least 138 DEG  C., e.g. 140 or 145 DEG  C.  Stretches of the order of 50 to 200 times the original length of the filaments and threads may be obtained.  When steam is employed the pressure is preferably such as to keep it just wet, but dry steam may be used.  In an example, cellulose acetate yarn is stretched to 90 times its original length in an apparatus such as is shown in Specification 443,707, the steam chamber containing wet steam at 142 DEG  C., and the length of the chamber being 18 inches.  In another example the length of the chamber is 9 inches, the temperature of the wet steam is 144 DEG  C., and the yarn is stretched to 170 times its original length.  In a third example, cellulose acetate yarn is stretched in hot water in an apparatus similar to that described in Specification 438,587, wherein the length of the hot water chamber is 9 inches and the temperature is 150 DEG  C. The yarn is stretched to 60 to 80 times its original length.  The products may be subjected to shrinkage as is described in Specification 389,823, or to saponification.  Specifications 438,584, 438,585, 438,586, 438,655, and 438,656 also are referred to.