baber/WOPTO huggingface dataset:
Patent GB-365068-A (GB)
Title: Porous metal and processes of forming the same
IPC: B22F3/105
Filed: 1930-09-30
Abstract: Articles, such as bearings, brake linings, and brushes for dynamo-electric machines are moulded from powdered metals the particles of which are coalesced by the application to the article of an electric current in a reducing or non-oxidizing atmosphere. In an example copper and tin powders are mixed with stearic acid dissolved in ether the latter being then evaporated leaving the metal particles coated with stearic acid.  The article to be produced is moulded at high pressure and then heated electrically in a reducing atmosphere to a sintering temperature.  The stearic acid is driven off before the sintering temperature is reached and the resulting article is thus porous.  The stearic acid also prevents the formation of metal oxides and reduces the push out pressure from the mould.  Palmitic, oleic, or other fatty acids, or hydrocarbon oils may be used in place of stearic acid.  A reducing atmosphere may be produced by the use of hydrogen, helium, or illuminating gas.  The heating to sintering temperature may be produced by induced currents.
Patent GB-504725-A (GB)
Title: Improvements in circuit arrangements for producing saw-tooth wave form electric oscillations
IPC: H03K4/10
Filed: 1937-10-27
Abstract: 504,725. Valve generating circuits. BRITISH THOMSON-HOUSTON CO., Ltd., and MYNALL, D. J. Oct. 27, 1937, No. 29368. [Class 40 (v)] In an oscillator for producing saw-tooth current in device C in which a condenser C1 is charged through R1 and discharged by D, the voltage across C1 being amplified by valve V, to prevent the distortion of the scan by ripple appearing across the self-bias system R3, C3 of the valve V, the lower terminal of C1 is connected to the cathode side of the bias combination. This enables the condenser C3 to be reduced without objectionable effect on the waveform. The C3, R3 combination may be designed to modify the charging rate of C1 to compensate for the curvature of the 1a-Eg characteristic of the valve, the shape of the wave being controlled by the product of C3 x R3 and the amplitude by the value of R3. Specification 459,610 is referred to.
Patent GB-946002-A (GB)
Title: Magnetic tape reading head
Inventor: DOUCE JOHN LEONARD
IPC: G11B5/127
Filed: 1961-08-15
Abstract: 946,002. Frequency responsive playback heads. NATIONAL RESEARCH DEVELOPMENT CORPORATION. July 31, 1962 [Aug. 15, 1961], No. 29385/61. Heading G5R. [Also in Division G1] Frequencies present on a magnetic record tape 6 are analysed by passing the tape along a path parallel to the axes of a plurality of heads 2, each comprising an insulating core 1 close bifilar wound at a pitch corresponding to twice the wire diameter, and producing an output maximum when the record wavelength # equals the winding pitch, the frequency being determined from the known recording tape-speed.
Patent GB-873215-A (GB)
Title: Improvements in or relating to duplicating devices
Inventor: SINCLAIR LEONARD SILVESTER
IPC: B41K1/32
Filed: 1958-09-13
Abstract: 873,215. Stencil hand-stamps. SINCLAIR Ltd., HARRY. Sept. 7, 1959 [Sept. 13, 1958], No. 29386/58. Class 100(2) A stencil hand-stamp comprises a handle 11, Figs. 1 and 3, secured to a metal or plastic support 10 with turned-over lips 12 to receive a removable metal slide 13 with a tongue 14 to facilitate insertion and removal and limit the inward movement. The slide 13 has secured thereto by adhesive or clips an ink pad 15 of foamed polyurethane enclosed in a covering 16 of woven cotton fabric, to which a pre-cut stencil is applied, the ink providing adhesion to retain the stencil. Out of use, the stamp is laid on a perforated sheet metal element 19 resting on a rectangular absorbent element 18 of foamed polyurethane or felt and containing white spirit, and resting in a tray 17, the spirit vapour maintaining the ink in the pad 15 in a fluid condition. Alternatively, the element 19 may be bent to channel shape and rest on the bottom of the tray.
Patent GB-440386-A (GB)
Title: Improvements in or relating to cathode-ray tubes
IPC: H01J29/16
Filed: 1934-10-13
Abstract: 440,386. Cathode-ray tubes. BAIRD, J. L., and BAIRD TELEVISION, Ltd., 58, Victoria Street, Westminster. Oct. 13, 1934, No. 29388. [Class 39 (i)] [See also Group XX] Screens for cathode-ray tubes produce light by incandescence as well as by fluorescence or phosphorescence on bombardment by the electron stream. Materials respectively becoming incandescent and fluorescent are mixed together or are coated on separate lattices or grids interdigitated or in spaced parallel planes. The incandescing material may be finely divided metals produced by sputtering, or finely divided carbon reduced from benzoic compounds or produced by incomplete combustion of oil of turpentine may be used with or without platinum black or spongy platinum. The fluorescent material may be barium platino cyanide, potassium uranyl stilphate, or natural rock crystals and fluorescent spars such as fluorspar (chlorophane) and troostite (zinc orthosilicate) which fluoresce only under strong excitation and withstand high temperatures. Instead of or in addition to fluorescent material, phosphorescent material may be used, including Sidot blende and zinc sulphide containing manganese salts and producing yellow or yellowish brown light. Substances exhibiting tribo- or thermoluminescence, such as prepared zinc sulphide, may be added. Specification 424,632 is referred to.
Patent GB-790148-A (GB)
Title: Improvements in or relating to electric measuring circuit arrangement
IPC: G05B11/32
Filed: 1955-10-17
Abstract: 790,148. Electric indicating systems. GENERAL MOTORS CORPORATION. Oct. 17, 1955 (Oct. 26, 1954], No. 29479/55. Class 40 (1). To enable a number of linear transducers, e.g. thermocouples, to act simultaneously on an indicating, recording or controlling device M over a common circuit so that the total effect is truly proportional to the sum of the responses of the transducers, e.g. G1-G4, Fig. 4, the transducers are connected in a ladder network in which the total resistance of the pth rung arm counting from the end remote from the meter is equal to that of the (p -1)th arm plus (p - 1) times the resistance of the riser arms. joining these two rung arms. In the case of thermocouples, a balanced arrangement is used in which the resistors on one side areof the same material as one of the thermocouple ele. ments and those on the other side of the same material as the other element. Any number of identical groups can be connected in this way to the same meter but where it is necessary to connect two or more unequal groups to the same meter, the larger (e.g. T1 ... T5) is connected as described and the smaller, e.g. T5 ... T7 in Fig. 2 is designed so that counting from the end remote from the meter, the rth rung arm has a total resistance equal to that of the r + 1th arm minus r times the resistance of the riser arms connecting it to the r + 1th arm and the rung arm closest to the meter has a total resistance equal to that of the corresponding arm in the other series plus n times the resistance of the riser arms connecting such corresponding arm to the meter minus m times the resistance of the riser arms connecting the arm itself to the meter; n and m being the total number of transducers in the larger and smaller ladders respectively. In an alternative arrangement, Fig. 3, having n and m transducers T1 ... T3 and T4, T5 respectively, both ladders are designed in accordance with the principles of Fig. 4 but the riser arms adjacent the meter of the shorter ladder have additional resistors to ensure that resistance of the nearest rung of the longer ladder plus n times the resistance of the riser connecting such rungs to the meter is equal to the resistance of the nearest rung of the shorter ladder plus m times the resistance of the riser connecting that rung to the meter. The transducers in Fig. 4 may be variable resistors controlling current flow from a voltage source (not shown).
Patent GB-1172183-A (GB)
Title: Food Casings and their production
Inventor: CHIU HERMAN SHIN-GEE
IPC: A22C13/00
Filed: 1968-06-21
Abstract: 1,172,183. Food casings. UNION CARBIDE CORP. 21 June, 1968 [23 June, 1967], No. 29641/68. Heading A2B. A fibrous food casing is produced by forming a tube of paper to which a solution of viscose is applied which is then regenerated in situ, inflating the resulting wet tube, drying, and flattening, characterised in that the inflated tube is circumferentially stretched to a diameter greater than a predetermined diameter, for example by passing the inflated tube through a partial vacuum, before drying is completed, and reducing the diameter to the predetermined diameter before flattening the dried tube. Preferably both the stretching and reducing are effected before starting drying.
Patent GB-489469-A (GB)
Title: Improved piston or piston rod leakage preventing means for hot steam engines
IPC: F16J9/02
Filed: 1937-10-30
Abstract: 489,469. Pistons; stuffing - boxes. BAUER, G. Oct. 30, 1937, No. 29735. Convention date, Nov. 2, 1936. [Classes 122 (i) and 122 (v)] In an engine using superheated steam the piston e, Fig. 1, is formed with an extension c provided with packing grooves d, the packing- rings being located at the end of the piston remote from the steam. The liner jacket is supplied with cooler steam from an intermediate stage in the engine. The stuffing-box, Fig. 2, is similarly formed, the packing grooves being formed in removable sleeves i, k. Leakage steam is drained away by a passage p, and water of condensation by a passage t, and lubricant is supplied by a passage s.
Patent GB-1202658-A (GB)
Title: Improvements in and relating to an adjustable arm-chair
Inventor: MOOSER ALFRED EGON
IPC: A47C1/031
Filed: 1969-06-12
Abstract: 1,202,658. Adjustable arm-chair. A. E. MOOSER. 12 June, 1969 [14 June, 1968], No. 29879/69. Heading A4J. The seat is pivoted at 2 to a frame 1 and to the back-rest member at 4. The latter member is pivoted at 6 to a link 7 which in turn is pivoted at 8 to the frame. A locking device retains the parts in adjusted position and as shown comprises telescopic members 15, 17 locked by handle 19. Arms 11 are on a parallel linkage with respect to seat 3. Several different arrangements of the locking device are disclosed.
Patent GB-163959-A (GB)
Title: Improvements in sparking plugs
IPC: H01T13/48
Filed: 1920-10-22
Abstract: 163,959. Armstrong, A. W. Oct. 22, 1920. Sparking-plugs. - Inspection of the spark during running is permitted by the provision of a tubular electrode closed at its outer end by a lens 11 or other transparent material. The inner end of the tube is contracted so as to leave a central opening 8x much less in diameter than the rest of the tube. To facilitate inspection, an inclined mirror may be placed at the outer end of the electrode.
Patent GB-751845-A (GB)
Title: Manufacture of saligenin
IPC: C07C37/20
Filed: 1951-12-20
Abstract: Saligenin (o-hydroxybenzyl alcohol) is manufactured by reacting phenol with formaldehyde at a temperature not exceeding 70 DEG  C. in the presence of a basic compound of an alkaline earth metal as a condensing agent and an alcohol as solvent under substantially anhydrous conditions.  Specified condensing agents include the oxides and hydroxides of calcium, strontium and barium, and the formaldehyde may be supplied as such, or in the form of a solid polymer.  In examples: (1) paraformaldehyde is added to a methanolic solution of phenol containing powdered calcium oxide, the mixture stirred at 40 DEG  C., then neutralized, steam-distilled and the saligenin extracted from the residue with benzene; (2) as in (1) but employing a solution of gaseous formaldehyde in methanol.
Patent GB-817213-A (GB)
Title: Process and apparatus for photographic printing
IPC: G03B27/80
Filed: 1955-10-19
Abstract: 817,213. Photo-electric exposure control. AGFA A.G. Oct. 19, 1955 [Oct. 28, 1954; Oct. 6, 1955], No. 29917/55. Class 40 (3). A photographic projection or contact printer comprises means for supplementing the printing light passing through the negative with addi. tional light which does not pass through the negative, and a photo-electric device arranged to receive the printing and additional light and to terminate the exposure when the total quantity of light incident on the light-sensitive material has reached a predetermined value. In the enlarger shown, printing light from a lamp 2 passes through a negative 7 which is imaged by lens 6 on printing paper 8, and additional light from a lamp 9, is projected through an adjustable diaphragm 11 and on to the printing paper 8 via reflector 10. The lamps 2, 9 are energized from the same source by a relay 16 under the control of an electronic device 15 connected to a photo-cell 14 which receives the total light passing through the printing paper. In use, the diaphragm 11 is adjusted to give an additional light intensity sufficient to produce the required contrast in the finished print and the electronic device, which includes a condenser changed by the photo-cell current, de-energizes relay 16 to terminate the exposure when the required quantity of light has fallen on to the printing paper. Another form is disclosed wherein lamps 2 and 9 are in separate supply circuits and lamp 2 is controlled by a switch operated by a timing device so that the additional light is incident on printing paper 8 for only part of the exposure time. The two lamps may also be replaced by a single lamp and a reflector system for directing part of the emitted light on to the printing paper without passing through the negative. The printing may follow the exposure of the printing paper 8 to the additional light.
Patent GB-738939-A (GB)
Title: Improvements relating to piezo-electric devices
IPC: H01L41/22
Filed: 1953-10-29
Abstract: 738,939. Gramophone pick-ups. GENERAL ELECTRIC CO. Oct. 29, 1953 [Oct. 30, 1952], No. 29947/53. Class 40 (4). [Also in Group XL (b)] A gramophone pick-up comprises a tubular ceramic (e.g. barium titanate) element 1 which is polarized in such a manner that it is piezoelectrically sensitive to torque. The element is attached to the end of a tone arm 25 and carries a stylus 26 which extends tangentially to the sound track in a record 28. The polarization of the element is such that variations in torque caused by the sound track produce symmetrical push-pull voltages between an inner and two outer circumferential electrodes 8, 3, 4.
Patent GB-876364-A (GB)
Title: Damping means for a vibratile shaft, and centrifuges and like rotating devices incorporating such means
IPC: F16F15/023
Filed: 1945-11-10
Abstract: 876,364. Centrifugal separators. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Nov 10, 1945 [Sept. 20, 1944], No. 30109/45. Class 23 [Also in Group XXXII] Each end of the rotor of a separator supported by stub shafts is provided with a vibration damper comprising fixed and movable interleaving sleeves surrounding the respective stub shaft, and means for maintaining a body of damping fluid between the sleeves, the sleeves having means connecting them to the end of the rotor and the respective stub shaft at a position spaced from the interleaving portions of the sleeves. The rotor 20 is driven by an electric motor 26 and rotates within a housing 21 on the stub shafts 22, 23 supported by bearings 24, 25, 27. The lower damper comprises a member 85 fixed to the lower end of the rotor and to the shaft 23, and journalled in a self centering bearing 86 which is carried by a base 87 supporting the movable sleeves 88. The fixed sleeves 90 are supported by a base 89 fixed to the housing, and relative rotation of the fixed and movable sleeves is prevented by flexible members 92 and stop pins 95. The lower damper is enclosed by a cap 101, 102, spring pressed seals 106, 112 sealing the enclosure 100 from the space 75 about the rotor. Damper fluid is supplied to and withdrawn from the enclosure by ducts: 120, 122 respectively, and oil is supplied to and withdrawn from the bearing 86 by ducts (not shown). The upper damper is of similar construction to the lower damper.
Patent GB-983035-A (GB)
Title: Method and apparatus for producing vacuum packages for food
IPC: B65B31/02
Filed: 1963-07-30
Abstract: 983,035. Seaming non-metallic sheet material. S. OMORI. July 30, 1963 [Aug. 2, 1962], No. 30175/63. Heading B5K. [Also in Division B8] A vacuum package is formed by placing the material 27 to be packaged between polyethylene films 25, 26, lowering an outer frame 1 and an inner frame 2, applying vacuum to evacuate the outer frame 1, and sealing the package by means of an electrode 3 secured to the inner frame 2. The films 25, 26 are supplied from feed rolls (not shown), the supply being stopped on feeding a package length. Levers 10, 11 are actuated to lower a shaft 14 on which the frames 1 and 2 are carried. A work table assembly 21 moves vertically in timed relation to the frames, an upper sealing plate having evacuation holes (not shown) and a lower plate having a single hole receiving a pipe 24 connected to a vacuum pump. The sealing of the package takes place in response to further downward movement of the inner frame 2 against the action of a spring 7. A hand wheel 17 is for linkage adjustment governing the vertical position of frames 1 and 2.
Patent GB-1480821-A (GB)
Title: Variable camber leading edge flaps
IPC: B64C9/28
Filed: 1974-07-08
Abstract: 1480821 Aircraft flaps A ALVAREZ-CALDERON 8 July 1974 [9 July 1973] 30246/74 Heading B7G An aircraft wing has a leading edge high lift flap comprising separate sections 3 and 7, the section 7 having a nose portion 9 pivoted thereto by pivot 8 the flaps in the retracted position shown in Fig. 1 forming a faired leading edge profile of the main wing and in the extended position shown in Fig. 2 forming a double slotted high lift device. In operation the flaps may be pivoted so that both slots 19, 53 are open or flap 3 may be pivoted to close slot 19. Relative curvatures, chords and proportions of the flaps to the dimensions of the main wing are specified. In an alternative embodiment (Figs. 6, 7, not shown) the flap 3 is pivoted at about its mid-chord and has a smaller nose profile and the flap 7 is unitary without a pivoted nose portion the gap on the bottom wing profile resulting, from this arrangement when the flap is retracted being closed by a pivoted flap. In Fig. 9 the leading edge flaps are shown on a wing in association with a multi-slotted trailing edge high lift device, both devices being operated by long-stroke jack systems.
Patent GB-1323528-A (GB)
Title: Method of proeucing alpha-phenyleth-anol and esters thereof
IPC: C07C29/09
Filed: 1971-06-29
Abstract: 1323528 Preparation of α-phenylethyl alcohol and esters thereof INSTITUT NEFTEKHIMICHESKOGO SINTEZA IMENI AV TOPCHIEVA AKADEMII NAUK SSSR 29 June 1971 [9 July 1970] 30318/71 Heading C2C α-Phenylethanol or an ester thereof is prepared by the oxidation of ethylbenzene in the liquid phase with molecular oxygen in the presence of an anhydride of a carboxylic acid to form an ester of α-phenylethanol and optionally saponifying the ester to form α-phenylethanol, the oxidation being effectd at a temperature of from 100‹ to 300‹ C. and at a pressure of from 1 to 100 atmospheres gauge.
Patent GB-602980-A (GB)
Title: Improvements in reversible gloves
IPC: A41D19/02
Filed: 1945-11-14
Abstract: 602,980. Gloves. KOENIGSTEIN, E. I. Nov. 14, 1945, No. 30471. [Class 141] In the construction of reversible gloves of the kind made up from a pair of similar blanks and fourchettes, each blank 15, Fig. 1, has finger and thumb portions 14, 12 with contacting edges formed by parallel slits 13, the thumb portion 12 merging by a loop-shaped opening 16 into the forefinger. Fourchettes of the shape shown in Fig. 2 are provided for connecting together the two blanks. The strap 23 extends from the wrist at 1 round the thumb to the loop 16, engaged by the end 3 of the strap. The strap 24 extends from the loop. 16 round the first finger to the point 5, the straps 25, 26 extend round the second and third fingers respectively and the strap 27 extends from the point 9 round the fourth finger to the wrist at 11. The blanks may be made of sueded lambskin, the wool forming the glove lining, and the fourchettes of ordinary leather.
Patent GB-1120898-A (GB)
Title: Improvements in and relating to tuning forks
Inventor: RAWLINGS CHARLES GUY
IPC: G04B17/04
Filed: 1966-07-07
Abstract: 1,120,898. Making tuning forks. HORSTMAN CLIFFORD MAGNETICS Ltd. 10 May, 1967 [7 July, 1966], No. 30483/66. Heading B3A. [Also in Division G3] A tuning-fork suitable for a clock or other timing mechanism is made by bending a strip of material to Y-shape and deforming the centre of the curved portion of the fork 17 to increase the rigidity of the fork. The strip is deformed by bending the longitudinal edge portions (18), (19), Fig. 4 (not shown), outwards. The bending is such that the end of a support fits into the recess formed and is secured to the central portion by soldering, brazing, spot welding, riveting &c. Alternatively the longitudinal edges of the curved portion may be bent inwardly. The strip is preferably a nickel-iron alloy having a zero temperature co-efficient of elasticity. In an alternative embodiment the fork is shaped so that the support 32 can be attached to the inner curve of the U-shape.
Patent GB-626329-A (GB)
Title: Improvements in or relating to apparatus for the manufacture of reinforced articles by extrusion
IPC: B28B3/22
Filed: 1946-10-15
Abstract: 626,329. Machines for extruding reinforced articles. SNELGROVE, E. C. Oct. 15, 1946, No. 30616. [Class 87 (ii)] An extrusion machine comprises means 17, 19, Figs. 2, 3, for retaining a reinforcing member 24 in the path of the material, e.g. cement, concrete, clay, being extruded and for releasing the member to enable it to be carried forward embedded in the material. Longitudinal reinforcing members 4 may also be provided. In a machine for extruding posts, beams, &c., an extrusion chamber 1 is provided with four extrusion screws 2 mounted on hollow shafts 3 which provide guideways for the members 4. Two vertical feed screws 6, Fig. 1, supply the material to the chamber 1. Reinforcing chambers 11, 12 are hinged at 9, 10 respectively, each chamber being used alternately. The chamber 11 as shown in Figs. 2, 3, terminates in a nozzle 14, and plungers 19 and notched rotatable rings 17 serve to hold reinforcing loops 24 and to release them in turn to be embedded in the material. The members 24 may be released by automatic means coupled to the device 5, Fig. 1, for feeding the longitudinal reinforcing members 4, the mechanism operating the screws 2, and the drive for a band conveyer 26 for receiving the extruded article. A number of nozzles 14 may be provided each supplied by a separate screw or group of screws. Some or all of the reinforcing members 4 may be fed through apertures in the walls of the chamber 1 instead of through the screws 2. The machine may also be used for providing a metal tube or pipe with a casing of cement or concrete reinforced with circumferential loops.