baber/WOPTO huggingface dataset:
Patent GB-527632-A (GB)
Title: Improvements in or relating to selector mechanism for epicyclic change gear speeds
IPC: B62M11/14
Filed: 1939-03-11
Abstract: 527,632. Making machine details. STURMEY-ARCHER GEARS, Ltd., and BROWN, W. March 11, 1939, No. 7925. [Class 83 (ii)] [Also in Group XXIV] In epicyclic gear ing of the kind set forth in Specification 483,992, [Group XXIV], i.e. with a shell c carrying sets of internal splines a b offset circumfer entially, the shell is machined so that the adjacent faces a<SP>1</SP>, b<SP>1</SP> of the offset splines are substantially within the same plane. An annular ring of width equal to that of both sets of splines is formed inside the shell and eight equally spaced splines are broached therein. The splines are then milled away from opposite ends to form offset splines. The milling may form a recess f in the shell. In a modification, Fig. 6. (not shown) the milling operation is performed before the broaching operation. Specification 519,945, [Group XXIV], also is referred to.
Patent GB-1391434-A (GB)
Title: Television standards conversion
IPC: H04N7/01
Filed: 1971-03-26
Abstract: 1391434 Television standards conversion BRITISH BROADCASTING CORP 24 March 1972 [26 March 1971] 7969/71 Heading H4F Television line standard conversion is effected by the following steps in either order (i) synthesising each output line by combining information taken from two or more input lines, and (ii) changing the line frequency by a simple ratio of small integers which ratio is slightly different from the actual ratio of the output to input line frequencies. When the simple ratio is slightly greater than the ratio of the output to input line frequencies, e.g. 3 : 2 for 625 to 405 conversion, or 5 : 6 or 4 : 5 for 525 to 625 conversion, then surplus lines are eliminated. The interpolation, i.e. synthesising of each output line, is effected with six one-line period delays connected in series, the resulting simultaneously available seven input lines being added together with different weighting coefficients. The line frequency changing, i.e. time redistribution, is effected using eight oneline stores. Reference is directed towards Figs. 1 and 4, of Specification 1,326,386. The converter may be used in combination with a field standards converter described in Specification 1,052,438.
Patent GB-326021-A (GB)
Title: Adjustable drilling jig
IPC: B23B47/28
Filed: 1929-03-12
Abstract: 326,021. Osborne, M., and Wellday, H. R. March 12, 1929. Drilling.-A drilling- jig comprises interengaging slotted V-jaws A, B, whereof the top one carries a drill bush E. The jaw B is slidable on a vertical pillar C and is moved to grip the work by a rotatable cam D engaging the top convex surface B<3> of the jaw. Springs F tend to raise the jaw and lock-nuts C<1> limit the upward movement.A slot H in the lower jaw accommodates an end stop for positioning the work, a screw G being provided for locking the stop in the adjusted position.
Patent GB-955486-A (GB)
Title: Improvements in or relating to sports leg guards
Inventor: BUKALDERS EDWARDS
IPC: A63B71/12
Filed: 1961-03-06
Abstract: 955,486. Leg guards. SLAZENGERS Ltd. June 4, 1962 [March 6, 1961], No. 8039/61. Heading A3V. A leg guard is padded with moulded polyurethane or polypropylene foam inserted in the form of strips 15 or as a sheet ribbed on one or both faces. The strips or sheets may be covered with a polyvinyl chloride or other skin with wings 16 which may be overlapped and stitched inside the leg guard by seams 7, 8. In an alternative arrangement one or both pieces of the leg guard covering material may be placed in mould before expansion of the foam, further stitching being carried out after removal from the mould. Reinforcing cane or plastic rods may be introduced into the padding at any stage of manufacture.
Patent GB-389651-A (GB)
Title: Improvements in electric water heaters
IPC: F24H9/12
Filed: 1932-03-18
Abstract: 389,651. Fluid - actuated valves. ELECTRIC FIRES, Ltd. and SMITH, C. H., Heatrae Works, St. George's Street, Norwich. March 18, 1932, No. 8090. [Class 135.] An electric water-heater is provided with a double-acting valve comprising valve members s, w. If pressure in the heater becomes excessive member s is raised against its spring t to allow the relief of the pressure. If the pressure in the container falls appreciably, below atmospheric pressure, member w opens against its spring y and admits air.
Patent GB-116349-A (GB)
Title: Improvements in or relating to Dry Gas Meters.
IPC: G01F3/22
Filed: 1917-06-07
Abstract: 116,349. Southon, J. C., and Gas Meter Co. June 7, 1917. Gas meters.-The flexible diaphragm of a dry gas meter is secured to the measuring chamber by an adjustably expanding ring which coacts with an internal groove on the chamber rim to grip the diaphragm between them. The various means of expanding the ring constitute the invention, and are shown in Fig. 4, in which the ends of the wire forming the ring are bent respectively into an eye c' and into a threaded turned-back portion c<2> carrying a nut e, in Fig. 5, in which loops f are formed in the ring for pinching or enlarging by means of a tool, in Fig. 9, in which both ends of the wire are formed into eyes c<1> through which a threaded rod g carrying nuts passes, a channelled strip h being provided to bridge the gap, and in Fig. 10, in which one end c<2> of the ring is bent slightly inwardly to pass through an eve c<1> formed from a channelled strip h<1> to which the other end of the ring is soldered.
Patent GB-385278-A (GB)
Title: Improvements in or relating to electric switches
IPC: H01R13/68
Filed: 1931-03-17
Abstract: 385,278. Couplings. RIETSCH, 0., 35, Rue Gambetta, Haubourdin, France. March 17, 1931, No. 8192. Convention date, March 17, 1930. Void [Published under Sect. 91 of the Acts]. [Class 38 (i). A coupling member for attaching a flex to a bayonet socket or wall socket has the contacts made separate from the flex terminals and connected thereto by fuse wires. This may be done by binding-posts mounted on the base plate, or by providing recesses h in the body of the coupling to contain the fuses c, d connected between the terminals j and the contacts l.
Patent GB-590289-A (GB)
Title: Improvements in or relating to a method of producing contact lenses
IPC: G02C7/04
Filed: 1945-04-03
Abstract: 590,289. Moulding contact lenses. NISSEL, G., and LAMBDA, W. P. April 3, 1945, No. 8196. [Class 87 (ii)] [Also in Group XX] Contact lenses are produced by clamping a shaped glass corneal portion 1, Fig. 2, between sheets or laminations 2, 3 of plastic material serving as the scleral portion, heating to soften the plastic and then applying pressure to one side to "blow" the sheets to a predetermined height to form the lens. The apparatus, Fig. 5, comprises a base plate 4 having an orifice 5. comprising a number of small apertures, connected by a pipe 6 to pressure means, and a contour cover 8 clamping the sheets 2, 3 to the base and having an aperture through which the lens is blown. A series of such covers with apertures of different shape permit various sizes of lens to be produced and the base plate 4 may be engraved with curves to permit location of the glass cornea 1 eccentrically of the scleral portion. A heating element 11 may be controlled by a thermostat.
Patent GB-815031-A (GB)
Title: The self setting horizontal blackboard ruler
IPC: B43L13/04
Filed: 1957-03-13
Abstract: 815,031. Draughting machines. HARGRAVE, H. April 1, 1957 [March 13, 1957], No. 8199/57. Class 97(3) A ruler is supported for parallel movement over a blackboard by a cable system passing round pulleys at the corners of the board, parts of the cable passing through flexible tubular housings which butt against adjustable end stops by which the cable tension may be adjusted. As shown in Fig. 8, the cable supports brackets 2, in which the ruler is pivotally mounted to be movable towards and away from the board, as well as balance weights 7 and passes round pulleys at 1, 3. Between the boxes containing the pulleys 3 the cable passes through flexible tubes which butt against the boxes and against end stops screw threaded, for axial adjustment, into tubular members 4. The two halves of the cable circuit may thus be independently adjusted for levelling the ruler initially. The brackets 2 carry rollers which bear on the blackboard and on the underside of a cover enclosing the cable and balance weights.
Patent GB-684458-A (GB)
Title: Improvements in machines for making sliding clasp fasteners
IPC: B21D53/50
Filed: 1948-03-22
Abstract: 684,458. Making sliding-clasp fasteners. MORSE, S. R. March 22, 1948 [Sept. 30, 1947], No. 8314/51. Divided out of 684,391. Drawings to Specification. Classes 83 (ii) and 83 (iv). [Also in Group XXV] The subject-matter is similar to that of Specification 684,391, but the claims are directed to a machine for forming sliding-clasp fastener elements and attaching them to a tape comprising a horizontally reciprocated ram carrying tools coacting with a die for forming and severing the elements from a vertically fed strip and tools actuated by the ram for clamping the elements to a horizontally fed tape.
Patent GB-937251-A (GB)
Title: Improvements in gas-liquid contacting apparatus
IPC: B04C7/00
Filed: 1961-03-07
Abstract: 937,251. Centrifugal separators. STANDARD FILTERBAU-G.m.b.H. March 7, 1961 [April 1, 1960], No. 8361/61. Class 23. [Also in Group XII] Apparatus for contacting gas with liquid, e.g. for removing dust, comprises a chamber 7 for liquid located below a vortex chamber 2 having a tangential gas inlet 1, and an open-topped inverted conical partition 8, formed with a central opening 11, separating the chambers and forming the bottom of the vortex chamber. Dusty gases entering the vortex chamber flow by paths X towards circular aperture 3, are sprayed with fresh water from a nozzle 25, pass through an after-cleaning chamber 4 and thence by paths Y, as cleaned gases, through chamber 6 to atmosphere. The dust and water particles are forced to the casing wall 27 and flow into the sludge water chamber 7. where the inspissated dust is removed through exit 13. The conical partition 8, which is supported from the casing by a perforated plate 9, has its upper edge spaced from the casing to allow sludge water displaced by the vortex to follow paths B into the liquid chamber and thereby create a pressure difference which produces a fountain-like flow of liquid through aperture 11. An adjustable overflow 15-17 is provided to vary the level of liquid in chamber 7.
Patent GB-1452044-A (GB)
Title: Abrasive blasting machines
IPC: B24C5/06
Filed: 1975-02-28
Abstract: 1452044 Blasting J R GOFF 28 Feb 1975 [13 May 1974] 8423/75 Heading B3D A centrifugal abrasive blasting device comprises a wheel 1 having a plurality of circumferentially spaced blades 5, an impeller 19 rotatable with the wheel, and a stationary control cage 21, each blade being retained on the wheel by one or more lugs 16, 17 formed on the blade and engaging one or more grooves 10, 11 on a respective block 4 secured to the wheel, the impeller preventing radially inward movement of the blades.  The blocks 2 are secured to the wheel by pairs of bolts, one bolt of each pair also acting to secure the wheel to a hub 26 mounted on the driving shaft 25 of a motor. Each block has a groove 10 at its inner end and a groove 11 formed with a recess (11<SP>1</SP>, Fig. 2, not shown) at its outer end, the grooves respectively receiving the lugs 16, 17 projecting from the rear face of the blade. A spring clip 33 may be secured to lug 17 and engage the recess (11<SP>1</SP>) to assist in positioning the blade during assembly. Radially inward movement of the blades is prevented by engagement with a plate portion 31 of the impeller 19 which is secured by a bolt 28 to the end of drive shaft 25, the impeller having a plurality of fingers which are not joined at their outer ends and abut the end of a feed shoot 22. The control cage 21 is secured to the blasting device by a retainer 23 and cage 24.
Patent GB-1029107-A (GB)
Title: Impedance transformer device
IPC: H03F1/56
Filed: 1965-02-26
Abstract: 1,029,107. Impedance transformer devices. BOLKOW G.m.b.H. Feb. 26, 1965 [Feb. 29, 1964], No. 8487/65. Heading H3T. An impedance transformer device includes an input transistor T1, the emitter of which is connected to the base of transistor T2, the collector of T1 being connected to the base of transistor T3, T2 and T3 being series connected and of complementary type to T1. Negative feedback is applied to the base of T1 from the emitter of T3. A variable resistor R3 is used to balance out any potential difference existing between the input and output points under no signal conditions.
Patent GB-824842-A (GB)
Title: Improvements in or relating to adding arrangements
Inventor: THREADGOLD RONALD
IPC: G06F7/501
Filed: 1955-03-24
Abstract: 824,842. Digital electrical calculating-apparatus. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. Feb. 21, 1956 [March 24, 1955], No. 8534/55. Class 106 (1). In a circuit arrangement for parallel addition of two binary numbers, means controlling all stages renders them responsive first to electrical conditions significant of the augend digits, then to electrical conditions significant of the addend digits and finally, excepting the first stage, to electrical conditions significant of any carry digits from preceding stages. The diagram shows one stage of the binary adder in which binary " one " of the augend or addend is represented by a rise in potential on lines LB1 or LB2, respectively, sufficient to fire the appropriate tube VKN1, VKN2 when its cathode circuit is completed by closure of contacts A or B. Contact A is closed first and, if the tube VKN1 is fired a negative pulse from its anode is applied to the cathode circuit of a tube VKC1 and causes it to fire. The consequent voltage rise at its cathode primes a tube VK1. Tubes VKC1, VKC10 form a two-state counter which, with VKC1 conducting, registers a count of " one "; this is signalled by the positive potential on an output line LI. Before the next phase the HT voltage at PHT is raised from (say) 50 volts to 130 volts so that, when contacts B are closed, if tube VKN2 is fired as a result of a positive potential on LB2 and VKN1 is also conducting (i.e. both the A and B digits in this order are " ones ") the negative pulse delivered to the cathode circuit of VKC1 and VK1 causes the latter to fire. This, in turn, supplies a negative pulse from its anode to fire VKC10 and the increased voltage drop at the anode of VKC10 extinguishes VKC1, removing the " one " signal from line LI. Also, the rise in potential at the cathode of VKC10 primes a " carry " tube VKC the anode lead of which goes via LTC1 and LRC1 to the common anode point of tubes VKN1, VKN2 in the next higher order of the adding circuit. Thus, when contacts C are closed the tube VKC, if it has been primed as described, is fired and causes a negative pulse to be applied to the cathode circuit of the counter tube VKC1 in the next higher order. If this counter has already received two pulses, tube VKC1 will be fired a second time to register " one " on the output line LI and also the carry to the next order will be performed. If the counter has received only one pulse before the " carry " pulse occurs, the latter will give rise to a further " carry," and tube VKC1 will be extinguished, as described above. Subtraction may be performed by complementary addition with " fugitive one " provision. The switch RS is opened to reset the circuit.
Patent GB-873583-A (GB)
Title: Improvements in the dissolution of copper
IPC: G01R15/00
Filed: 1959-03-13
Abstract: Metallic copper is dissolved in an aqueous solution containing initially 20%-40% by weight of a water soluble persulphate, for example, sodium, lithium, and especially ammonium persulphate, based on the total weight of solution, the temperature of the solution being maintained at 120 DEG F.-175 DEG F.  The copper is preferably added to the solution in increments.  The process may be employed for the chemical machining of copper, or in the manufacture of printed circuits, in which copper foil is laminated to the surface of a board, the circuit masked, for example, by an ink applied by silk screen printing, and the unmasked areas dissolved away, for example, by splashing on the solution with a paddle etcher.
Patent GB-1499641-A (GB)
Title: Hollow charge projectiles
IPC: F42C15/40
Filed: 1976-03-04
Abstract: 1499641 Hollow charge projectiles FORENADE FABRIKSVERKEN 4 March 1976 [7 March 1975] 08721/76 Heading F3A When a hollow charge explosive projectile is discharged, its detonator 5 automatically moves from the safety position shown to a preselectable one of two possible armed positions, the charge being fired centrally in one of the positions and eccentrically in the other. This enables the breadth of the explosion to be adjusted to suit the target. Although the detonator 5 may be carried by a slide, it is preferably mounted in a spring- drive rotor 4 which automatically turns until a projection 6 engages either a movable stop 8 (which will leave the detonator not quite aligned with the projectile axis, for eccentric firing) or a fixed stop 7 (for central firing). In one embodiment (Fig. 4, not shown) the movable stop is formed by a pivoted arm carrying a magnet. Rotation of a further magnet (14) on the barrel deflects the arm either towards or away from the rotor 4. In another embodiment (Fig. 5, not shown) the angular position of the barrel, and hence of the projectile, is adjusted before firing so that a ball (17) falls under gravity towards either the blind end or the open end of a short channel. If at the open end, when the projectile is fired the ball is thrown by its inertia along a further channel (15) until it strikes, and thereby ejects, a sliding stop (16).
Patent GB-512922-A (GB)
Title: Improvement relating to folding camp-stools and tables
IPC: A47C9/10
Filed: 1938-03-22
Abstract: 512,922. Folding stools and tables. TURNER, J. March 22, 1938, No. 8753. [Class 52 (ii)] A central tongue 4 on one leg passes through a transverse slot 2 in the other leg. The legs may be of wood or metal. If the device is used as a table a plywood top may be hinged to the top of one leg and detachably fastened to the top of the other leg, or the top may comprise two leaves hingedly connected to each other and to the tops of the legs.
Patent GB-330961-A (GB)
Title: Improvements in spades
IPC: A01B1/04
Filed: 1929-03-18
Abstract: 330,961. Holloway, R. March 18, 1929. Fixing T-shaped handles by screwed sockets; grip, facilitating. - The tubular handle shaft 13 of a spade screws into a socket 12 integral with the blade 7, and is provided with a separate tubular handgrip 17 having a threaded socket 18 to screw on to the shaft. The lower surface of the hand-grip is curved as shown and has downwardlyturned projections 21 at the ends. Tubular rubber sheaths 22, 23 encase the shaft 13 and grip 17. In a modification the handle shaft is longer and the hand-grip 17 is dispensed with.
Patent GB-1519576-A (GB)
Title: Method of producing reinforced clay based articles
IPC: C04B33/36
Filed: 1977-03-02
Abstract: 1519576 Reinforced clay based article ACI TECHNICAL CENTRE PTY Ltd 2 March 1977 [15 March 1976] 08773/77 Heading C1J [Also in Division C3] A method of producing a reinforced clay based article comprises forming a shaped mixture including the following ingredients in the proportions specified by percentage weight of the total solids in the composition:- fibrous reinforcement 1-30%, montmorillonitic clay 0-14%, kaolinitic clay 0-95%, illitic clay 0-95%, filler 0-90%, and water 20-100%, drying the shaped article, and firing the dried shape at 500-800 C. to substantially stabilize the clays in the composition against redispersion in water, without forming a ceramic article therefrom, the sum total of clays in the composition being 5-95% by weight of total solids. The filler may be talc, pulverized fuel ash, fine silica, diatomaceous earth, feldspar or blast furnace slag whilst the fibrous reinforcement may be glass fibre, carbon fibre, mineral wool or asbestos. The composition may also include a deflocculant, e.g. sodium hexametaphosphate, sodium silicate or a flux, e.g. boric acid, lithium carbonate.
Patent GB-250252-A (GB)
Title: Improvements in toe dancer's shoes
IPC: A43B5/12
Filed: 1926-03-31
Abstract: 250,252. Solomonoff, J. L. March 31, 1925, [Convention date]. Soles; heels.-The sole of a toe dancer's shoe is formed arcuately or so that any bending tendency is towards the sole of the foot and not away from it. The shoe has an inner sole 21 of stiffened leather arcuately made so as to assume an extremely arched formation similar to a highly-arched foot. An additional stiffening sole 22, also arcuately formed, is attached to the first bv adhesive and staples or nails 24. This sole holds the box toe layers at 25. The stiffening sole 22 is preferably split at 27 to form upper and lower layers 28, 29 between which is inserted a member 30 shaped on its upper surface 31 like the arch of a shoe and preferably forming the heel. The split member 29 is attached to the heel and turned over the bottom face which is covered by a wearing layer 34. The outer portion of the shoe is preferably of fabric material, satin, silk, or may be leather. The lining 13 is finished off by tape 14 which may have a drawstring. At the toe layers of padding material 17 are inserted between the leather layers.
Patent GB-254029-A (GB)
Title: Improvements in and relating to optical projection apparatus
IPC: G03B21/20
Filed: 1925-04-02
Abstract: 254,029. Kamm, L. April 2, 1925. Optical-projection apparatus.-Two high power lamps in the optical axis are used in conjunction with a Mangin or like mirror and a condenser to illuminate the film or slide; two such pairs of lamps may be carried on a transversely movable support, so that, should a lamp fail in use, a change over to the alternative pair may be effected. Fig. 2 shows diagrammatically in plan a lamp house 3 having lamps 7, 8, a mirror 6, and a condenser 10, 11. The lamp house may be used in the position shown in continuous lines to illuminate, in conjunction with an additional adjustably mounted lens 13, the film gate of a kinematograph projector, or may be moved into the position shown in broken lines to illuminate a slide 12<a> projected through a lens 5. Fig. 4 shows in plan two pairs of lamp holders, 7, 8 and 17, 18 respectively, mounted so as to be separately adjustable in the optical axis on a tray 20 movabdle laterally on a support 22 which is adjustable is the optical axis. The tray 20 carries resilient contact members 28<a> - - 31a which may alternatively engage contacts 28 - - 31 on the support 22, the contacts 28, 29 being provided with terminals 41 for connection to the lighting cable. The lamp house may have a cooling fan as described in Specification 240,597, and a heat absorbing trough may be fitted in connection with the condenser. Specifications 157, 070, [Class 75 (iv), Lamps, &c., Kinds &c. of], and 216,925 also are referred to.