baber/WOPTO huggingface dataset:
Patent GB-507789-A (GB)
Title: Improvements in ventilating systems
IPC: B63J2/10
Filed: 1938-03-05
Abstract: 507,789. Ventilation systems and apparatus. STEWART, F. C. March 5,1938, No. 6997. [Class 137] A ventilating system includes an air-supply duct 10 which is supplied with air by a fan 9, and fitted with regulatable discharge louvres 11. Automatic air-relief valves 12 are adapted to open when the air pressure within the duct rises due to the discharge through the louvres being arrested. The relief valves 12 may each comprise a frame 13 attached to the top of the air-duct 10, in register with an opening 14, and presenting a central boss 15 which is supported by spider arms 16. 17 denotes a relief valvedisc which is carried by a spindle 18, guided.in the boss 15, and which rests normally on the seat 19. A disc 20 of felt packing-material is attached to the valve-disc. A sheet metal cover 21 is provided with air outlets 22 and internal deflector plates 23. In a modification, the air relief valve may be fitted in the sides or bottom of the casing, and loaded with springs. Alternatively, the cover may be cylindrical, or it may form a valve seat engageable by the valve disc.
Patent GB-871749-A (GB)
Title: Improvements in or relating to drag shovel excavators
IPC: E02F3/50
Filed: 1959-03-02
Abstract: 871,749. Shovelling machines. HELLANDER, T. A. March 2, 1959, No. 7159/59. Class 68(1). In a drag shovel excavator the shovel-carrying dipstick 8 is pivoted on a carriage 2 that can be slid along a boom 3 and held at a position most Next the seam is mined out to half the depth of the undercut by a single drum 22 secured to a shaft 13 rotatably mounted in the support 11, rotatable in a housing secured to and above the jib-carrying turret of the machine. The support 11 can be swung in the housing by a jack extending between the support and the chassis of the machine. At the end of this advance of the machine the second cutter drum 27 is secured to the free end of the first drum so that the remaining undercut portion of the seam is mined out on the return run of the machine. Loading ramps are provided on the machine to deal with the mined mineral produced in either direction of advance of the machine.
Patent GB-1525685-A (GB)
Title: Sodium aluminium phosphate
IPC: C01B25/45
Filed: 1977-02-21
Abstract: 1525685 Potassium modified sodium aluminium phosphate STAUFFER CHEMICAL CO 21 Feb 1977 [30 March 1976] 07176/77 Heading C1A A potassium modified 1:3:8 sodium aluminium phosphate for the baking industry is made by contacting at above 40‹ C a food grade phosphoric acid having a concentration of 85-88% H 3 P0 4  with a sufficient amount of potassium ion to provide 0À5-1À2% K 2 O in the final product, contacting with sufficient amount of sodium ion to provide 2À4-3À2% Na 2 O. contacting the sodiumpotassium treated phosphoric acid with alumina trihydrate to provide a concentration of 15-17% Al 2 0 3  in the final product, cooling the slurry to a temperature of 60-75‹ C, drying and granulating the product and preferably milling and classifying it to obtain a particle distribution of 0À1-5%+60 mesh, 3-20%-60+100 mesh and 9-50%-100+140 mesh. The product is characterized by an X-ray diffraction pattern showing a doublet at 8À61 and 8À46A.
Patent GB-556339-A (GB)
Title: Improvements in or relating to means for supplying heated air to furnace and the like fires
IPC: F23L15/00
Filed: 1942-05-29
Abstract: 556,339. Furnace doors. METCALFE, H. May 29, 1942, No. 7289. [Class 51 (i)] Heated air is supplied to furnaces &c. through a box 1 which is attached to the furnace door at its open side 2 and is formed with vertical internal baffles 3, 4 having vertical, curved or angled fins 7, 15 extending between the baffles so as to cause the air entering through the usual apertures in the furnace door to take a circuitous path before discharge into the furnace through apertures 6 in a flat nozzle 5 in the upper or middle part of the closed side of the box. The fins may be spaced at equal or unequal distances apart and may overlap vertically or be arranged in horizontal groups, those in one group being preferably displaced horizontally relatively to those of another group. Additional fins 18, 19 may be provided above and below the baffles and in the nozzle 5. The closed side of the box may be of truncated-pyramidal form with the air outlets at the centre.
Patent GB-344228-A (GB)
IPC: F16C25/02
Filed: 1930-03-06
Abstract: 344,228. Cylindrical journal bearings. MACKENSEN, O., 2, Riemannstrasse, Jena, Germany. March 6, 1930, No. 7346. Convention date, March 16, 1929. [Class 12 (i).] Lubrication of a bushing b is promoted by deforming it by means of a screw d, which, acting in conjunction with feet b<5>, b<6>, causes crescent-shaped gaps to appear between shaft and bushing.
Patent GB-471904-A (GB)
Title: Improvements in and relating to safety glass
IPC: B32B17/10
Filed: 1936-03-11
Abstract: 471,904. Compound glass. MEYER, D. March 11, 1936, Nos. 7367 and 7368. Convention dates, March 25, 1935 and April 17, 1935. [Class 140] Safety glass is made by uniting, without the use of heat, sheets of glass, one or more of which is coated with a polymerization product such as polyvinyl acetate, in the presence of a neutral liquid which does not dissolve or disperse the coating. Sheets of glass are coated with a solution of polyvinyl acetate, dried, and wetted by immersion or washing with an alcohol such as butyl alcohol or a hydrocarbon such as benzine, after which the wetted coatings are pressed together, e.g. by a roller. Cellulose derivatives, such as nitro-cellulose or benzyl cellulose, may be added to the polymerization. product. A thin layer of adhesive may be applied to the glass sheets before application of the polymer.
Patent GB-1213383-A (GB)
Title: Improvements in or relating to heat control devices for electrical hot plates particularly those of stoves and ranges
IPC: H05B3/68
Filed: 1968-02-15
Abstract: 1,213,383. Switching systems for heating resistors. GENERAL MOTORS-HOLDEN'S PTY. Ltd. 15 Feb., 1968 [23 Feb., 1967], No. 7396/68. Heading H2H. A circuit for supplying an electric hot plate includes at least two heating elements which are connected in parallel for initial heating at a high rate, and are then automatically switched into a series arrangement for further heating at a lower rate. One of the elements may be deenergized during the initial heating. The circuit shown includes a regulator 2, heating elements 8, 9, and a relay 4 controlled by a bi-metallic timer 3. The regulator is switched on by closing a manual switch 6 which automatically closes a cycling switch 7. Momentarily, current flows through the elements 8 and 9 in series, but since contacts 11 in the timer 3 are closed, the relay 4 is actuated so as to close contacts 16 and 17, putting elements 8 and 9 in parallel for rapid heating of the plate. After a present time, the contacts 11 will open, de-energizing the relay 4, and so returning the elements to a series arrangement for the remainder of the desired cooking time. The cycling times of the switch 7 are determined by the user's setting of the regulator 2, and are so arranged that, at settings below the maximum, the initial closed time of switch 7 is less than that of switch 11. This results in the latter part of the initial heating period involving heating only by the element 9.
Patent GB-948737-A (GB)
Title: Improvements in or relating to transistor carrier frequency amplifiers
IPC: H03F3/191
Filed: 1960-03-02
Abstract: 948,737. Transistor amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. March 2, 1960 [March 5, 1959], No. 7397/60. Heading H3T. In a carrier-frequency transistor amplifier, cross-modulation between desired signals and interference signals is reduced by arranging that the impedance connected between the input terminals of the transistor is such that the relationship is at least approximately satisfied, Zo being the input impedance of the transistor and Zp, Zv and Zs being the values of the impedance connected between the input terminals of the transistor at modulation frequencies, at frequencies corresponding to the difference between the frequences of desired and interference signals, and at frequencies corresponding to the sum of the two last-mentioned frequencies, respectively. Thus in a grounded base amplifier in which capacitor 6 has a negligibly small impedance at all significant frequencies, resistor 5 is substantially independent of frequency and parallel resonant circuit tuned to the frequency of desired signals from source e 1  has a negligibly small impedance at all other frequencies, the above condition is satisfied if the resistance of resistor 5 is one half the input impedance of the transistor. If resistor 5 is by-passed by a capacitor so as to make the impedance negligibly small at the sum frequency but not to affect the values of Zp and Zv, the condition is satisfied if resistor 5 has a resistance equal to the input impedance of the transistor. The resistor 5 may be temperature-sensitive to compensate for temperature-sensitivity of the transistor. Resistor 8 may also be made temperature-dependent. The invention may also be applied to commonemitter transistor amplifiers.
Patent GB-575883-A (GB)
Title: Improvements in electric welding apparatus
IPC: B23K11/00
Filed: 1944-04-21
Abstract: 575,883. Uniting by fusion. STANDARD TELEPHONES & CABLES, Ltd., and GILLIVER, G. April 21, 1944, No. 7410. [Class 83 (iv)] An electric fusion welding tool for joining conductors, such as wires or strips &c. to terminal tags &c., comprises means for clamping the wires &c. with their ends in a fixed position with respect to a welding electrode, a shutter normally interposed between the electrode and the wires and means for moving the electrode into contact with the wire ends, such means being adapted also to cause withdrawal of the shutter out of the path of the electrode. The welding current may be provided by a condenser charged and discharged as described in Specification 570,681, so as to join the wires by fusion and so interrupt the circuit automatically. A box is provided with bus-bars 2, 3 connected to the two terminals of the condenser, the bar 2 being connected to a bracket 4 carrying fixed and movable vice jaws 5, 6, the latter of which is spring mounted in a slide 9 moved in guides by a cam 8 operated by a hand lever 7. With the handle in a vertical position, the jaws are open, the aperture being closed by a stop or shutter 14 which is held down by a catch 15 against the action of a spring 29 and is pushed down by a roller 13 on the handle 7 when the latter is raised to its vertical position to open the jaws. The bar 3 is connected to a copper block 16 in which is mounted a spring-returned push-button plunger 17 having at its front end a plate 18 carrying a carbon electrode 19. The plate which is electrically connected to the block 16 by a piece of copper braid 23 carries also an insulated pin 21 for releasing the catch 15 and in addition a contact 22 which is normally in engagement with a contact 26 mounted on a spring 27 flexibly connected by a loose'plug inserted in a socket on the welding equipment. With the bus-bars 2, 3 connected to the terminals of the condenser and the contact 26 to one terminal of the charging source thereof, when the plunger 17 is operated after clamping the wires in position by moving down the handle 7, the contacts 22, 26 separate and the condenser disconnects from the charging source. The pin 21 first depresses the catch 15 so that the shutter is raised by the spring 29 and when the electrode 19 makes contact with the wires the condenser is discharged to effect the weld. On release of the push-button, the contacts 22, 26 again engage to recharge the condenser. The handle is then returned to vertical position to release the clamps and reset the shutter in gauging position.
Patent GB-954174-A (GB)
Title: Shuttlecock
Inventor: WOLF JAMES ERNEST
IPC: A63B67/18
Filed: 1963-02-25
Abstract: A shuttlecock has a head of moulded polyethylene sponge, the outer surface being roughened to expose the cells therein whereby a better grip on the racket is obtained.
Patent GB-395452-A (GB)
Title: Improvements in or relating to self-propelled rail vehicles
IPC: B61C9/10
Filed: 1932-03-12
Abstract: 395,452. Railway-vehicle under-carriages. ASSOCIATED EQUIPMENT CO., Ltd., Windmill Lane, Southall, Middlesex, and CLEAVER, C. F., Braunston, Stoke Park, Slough, Buckinghamshire. March 12, 1932, No. 7432. [Class 103 (vi).] The axles 11, 12 of a motor railway vehicle are connected to the frame 10 by springs 34 .. 37, the spring 36 being above the axle so as to give room for the driving gear and the other springs being below the axles. Instead of this arrangement the spring 36 may be below and the driving-gear above the axle; all the springs may be arranged either above or below the axles.
Patent GB-1211846-A (GB)
Title: Improvements relating to automatic battery charging systems
Inventor: BARKER JOHN SCOTT NETHERWOOD
IPC: H02J7/00
Filed: 1967-02-16
Abstract: 1,211,846. Charging batteries. BARDIC ENG. Ltd. 13 Feb., 1968 [16 Feb., 1967], No. 7441/67. Heading H2H. A battery charging system includes a main battery which may be connected either to a load or to the terminals of a charging circuit. When the load circuit is closed, an auxiliary battery is connected through a resistor to the main battery, so that the latter charges the auxiliary battery as it is itself discharged. The auxiliary battery can also be connected to a relay which terminates or modifies the charging current fed from the charging circuit to the main battery when the voltage of the auxiliary battery falls below a preset value. In the system shown, the portion within the line 10 is incorporated in a portable device, e.g. a radio. When the switch 12 is closed, a load 11 is driven by the main battery 15, and an auxiliary battery 16, which is initially discharged, is charged by the main battery when not in use, the device may be recharged by plugging into a socket 24, 25, 26. This causes a relay 27, 28 to be actuated by the auxiliary battery 16, and the main battery is thus charged through a rectifier 30. The auxiliary battery loses its charge, and eventually its voltage drops below that necessary to hold the relay which cuts out and stops the charging. The main battery is now in a recharged condition. A lamp 35 may be connected across the relay switch 28 to indicate when charging is complete and also to allow a subsequent trickle charge to flow into the main battery. Also, a by-pass resistor (not shown) may be provided between the sockets 25, 26 to prevent the auxiliary battery being over-discharged.
Patent GB-1130239-A (GB)
Title: Combine harvester
IPC: A01D41/12
Filed: 1966-02-21
Abstract: 1,130,239. Combine harvesters. R. CLAAS. 21 Feb., 1966 [22 Feb., 1965], No. 7520/66. Heading A1F. In a combine-harvester with a header that is detachable from the elevator tunnel, the header 7 and the elevator tunnel 2 are provided with complementary self-centring elements 13, 14, 15 which co-operate to align the parts upon forward or upward relative movement thereof. The elements include three splayed plates 13 flanking the outlet aperture 12 of the header, the upper plate carrying two hollow conical cups 15 which can be entered by conical spigots 14 on the fore-part of the elevator tunnel 2. Locking means (Fig. 3, not shown) carried on the lower adjacent edges of the header and tunnel so as automatically to interengage as the parts mate together. In a modification (Fig. 4, not shown) the cups and spigots are replaced by a pair of jaws on the tunnel which enter tapering sockets on the header and are there locked by spring-latches.
Patent GB-894649-A (GB)
Title: Polymerisation of ethylenically unsaturated compounds
Inventor: COFFMAN DONALD DRAKE
IPC: C08F2/00
Filed: 1960-03-03
Abstract: The polymerization of ethylenically unsaturated compounds is initiated by fluoroazoalkanes of the formula R-CF2-N = N-CF2-R where R is fluorine, a perfluorocarbon radical or an omega-hydroperfluoro-carbon radical.  Polymerization may be effected by heat and/or light.  Thermal polymerization will usually be at 50 DEG  to 300 DEG C. and photo-chemical polymerization at -50 DEG  to 100 DEG C. using light of wave-length 1800 to 7000   e.g. from a mercury vapour arc, tungsten bulb, sun lamp or ordinary sunlight. Polymerization may be carried out by conventional bulk, solution, emulsion or granular techniques but preferably in an inert unpolymerizable organic liquid, e.g. a saturated fluorocarbon. Several fluoroazoalkanes, ranging ud to the azotridecane, are specified.  The compounds are claimed and their preparation described in Specification 870,328.  Specified monomers are 1, 3 butadiene; isoprene; 2-chloro-1, 3 butadiene; vinyl acetate, butyrate, laurate, palmitate and salicylate; isobutenyl acetate; acrolein; methylvinyl ketone; vinyl ethyl and isobutyl ethers; ethylene; propylene; isobutylene, octadecene-1; styrene; alpha-methyl- and chloro-styrenes; vinylnaphthalene; phenyltrifluoroethylene; acrylonitrile; acrylic acid; ethyl acrylate; methyl methacrylate; n-octyl methacrylate; methoxymethyl methacrylate; beta-diethylaminomethyl methacrylate; ethyl alpha-chloroacrylate; methacrylonitrile; acrylamide; methacrylamide; tetrafluoroethylene; hexafluoropropylene; chlorotrifluoroethylene; 1, 1-dichloro-2, 2-difluoroethylene; perfluoroheptene-1; perfluorononene-1; ethyltrifluoroethylene; 8-hydroperfluorooctene-1; n-dodecyltrifluoroethylene; vinyl chloride and fluoride; vinylidene bromide and fluoride; 1-chloro-1-fluoroethylene; N-vinyl phthalimide, succinimide, butyrolactam and caprolactam; and vinyl pyridine. Specified pairs of comonomers are tetrafluoroethylene or vinylidene fluoride/hexafluoropropylene; ethylene/tetrafluoroethylene or vinyl acetate; acrylonitrile/isobutylene; vinyl chloride/vinyl acetate; methyl methacrylate/styrene; and dialkyl maleates or fumarates/styrene or vinyl acetate.
Patent GB-917369-A (GB)
Title: Process for the manufacture of dye receptive acrylic fibers
IPC: D01F6/18
Filed: 1961-03-02
Abstract: Dye-receptive polymers are formed by the copolymerization of acrylonitrile and ringsubstituted or unsubstituted N-vinyl-3-morpholinone, optionally together with other monomers, in an aqueous zinc chloride solution and coagulation of the copolymer as yarn or film in the solution.  Substituted N-vinyl-3-morpholinones specified are the 2-, 5-, and 6- methyl, ethyl, butyl, chloromethyl, and bromethyl derivatives.  Other monomers specified are vinyl acetic acid, acetate, propionate, and butyrate; 2-vinyl and 2-vinyl-5-ethyl pyridine; methyl, ethyl, and dimethylaminoethyl acrylate; acrylic, itaconic, and fumaric acid; ethylene, allyl, styrene, and vinyl toluene sulphonic acid and alkali metal salts; and allyl alcohol, butadiene, methacrylamide, methacrylonitrile, and fumaronitrile.  The copolymer may be derived from 80-90% of acrylonitrile and 1-20% of N-vinyl-3-morpholinone.  The solution may contain 55-65% of zinc chloride.  Polymerization may be carried out at 20 DEG -100 DEG C. and in the presence of a catalyst.  Catalysts specified are ammonium and potassium persulphate, hydrogen peroxide, and azo-bis-isobutyronitrile.  Polymerization may 50-80% complete, unreacted or partially reacted volatile constituents being removed before coagulation.  The solution may contain 2-20% of the resulting copolymer.  The coagulating solution may be water or 25-50% aqueous zinc chloride solution.  Examples are given.
Patent GB-868113-A (GB)
Title: Improvements in or relating to pedals for bicycles and like vehicles
IPC: B62M3/12
Filed: 1960-03-04
Abstract: 868,113. Reflex reflectors. UNION GES. FUER METALLINDUSTRIE. March 4, 1960 [March 12, 1959], No. 7665/60. Class 3(2) [Also in Group XXXI] In a cycle pedal whose rubber tread ribs 7 are attached by holding plates 12 to two longitudinal sides of a pedal frame, the holding plates with the rubber tread ribs 7 are attached to a pedal stirrup 3 by means of hollow rivets or rivet shanks 14 made out of the material of the pedal stirrup. Reflecting bodies 16 are accommodated in apertures in both sides of the pedal stirrup.
Patent GB-684818-A (GB)
Title: Liquid density measuring attachment for photoelectric densitometers
IPC: G01N21/25
Filed: 1951-04-03
Abstract: 684,818. Photo - electric densitometers. GENERAL ANILINE & FILM CORPORATION. April 3, 1951 [April 4, 1950], No. 7716/51. Class 40 (iii). A device for measuring the light - transmitting properties of liquids utilizes the photo-cell carrying arm of the type of densitometer in which the arm pivots on to one surface of a sample, a light source being situated on the other side. As shown, the liquid under test is placed in a special holder in a compartment 20. A light source (not shown) is situated at one end of the compartment and after passing through the sample the light emerges through an aperture 31 in the other end of the compartment and enters the aperture in the photocell carrying arm. This arm is pivoted between lugs 35, 36 and a clamp 16 holds the aperture in the arm in alignment with aperture 31, the arm forming a light-tight seal with the surface of the box. At the bottom of compartment 20 is a recess in which a test-tube may stand. Alternatively the trough shown in Fig. 9 may be used. This trough has an aperture at each end and a " V "-shaped bottom in which rests a cylindrical container 43 having filling tubes 44, 45. A further container may be provided which can be accommodated in line with this trough and which has a number of slots to hold square filters. Compartments 20 and 21 are provided with a light-tight lid. Compartment 21 and the space under hinged lid 26 may accommodate accessories. Specification 601,465 is referred to.
Patent GB-374171-A (GB)
Title: Chain stud extractor
IPC: B25B27/22
Filed: 1931-03-13
Abstract: 374,171. Chain rivet extractors. FERGUSON, C., 50, City Road. Brechin, Angus. March 13, 1931, No. 7747. [Class 61 (iii).] A chain rivet extractor comprises a U-shaped member A carrying a thrust screw C at the bridge part D and having feet B held fast between clamp members F which are curved at the middle to embrace the chain roller and held .together by clamp bolts G.