baber/WOPTO huggingface dataset:
Patent GB-563872-A (GB)
Title: Improvements in optical instruments for the precise measurement of angles
IPC: G01C1/02
Filed: 1943-04-02
Abstract: 563,872. Theodolites &c. COOKE, TROUGHTON & SIMMS, Ltd., and TAYLOR, E. W. April 2, 1943, No. 5322. [Class 97 (ii)] In an optical system for the measurement of angles such as in theodolites as described in Specification 288,416, [Class 97 (ii)], in which light from the sky &c. is reflected by a mirror 3 into two coaxially arranged prisms 1, 2, thence through two further prisms 4, 5, through apertures 6, 7 into the mounted glass circle plate 8, back thence to the prisms 4, 5 through objectives 13, 14, deflecting prisms or plates 19, 20, field prisms 11, 12 and thence to the eye-piece, it has been found that due to the use of materials of different coefficients of expansion in the reading system, whereby a symmetrical displacement of the image of the circle graduations takes place, though no reading error, is thereby introduced, whereby the sensitivity of the setting is impaired or means of adjustment had to be provided for correction. Accordingly, each objective mount is provided with means controlling the change of distance with temperature of the centre of each objective relatively to the base line 24 so that it conforms closely to corresponding changes affecting the distance of the focal plane from the same base line 24. As shown in Fig. 2, the mount 15 of each objective 13 is secured to the metal prism plate 16 by studs 17, 18 passing through a distance-piece 22 of low coefficient of expansion, such as the alloy known under the Registered Trade Mark " Invar," and a similar piece 23 of high coefficient of expansion, such as the material known under the Registered Trade Mark " Perspex," the arrangement being such that on change of temperature the mount 15 rocks on the distance-piece 22.
Patent GB-1513709-A (GB)
Title: Copper plating bath and process and additive compositions for use therein
IPC: C07D213/84
Filed: 1977-02-09
Abstract: 1513709 Level copper electro-plating R O HULL & CO Inc 9 Feb 1977 [5 March 1976] 05405/77 Heading C7B An aqueous acid Cl-containing Cu electroplating bath comprises as levelling agent the reaction product of one or more epihalohydrins or glycerol halohydrins with one or more N-containing compounds selected from specific substituted pyridines, (iso- or 3-amino) quinoline or benzimidazole. The bath may also contain at least one brightener containing (i) a CS group in which the C atom is attached to at least one other S or N atom and (ii) a carboxylic or sulphonic acid group or alkali metal salt thereof, preferably dithiocarbamic acid derivatives; and a wetting agent e.g. polyalkylene glycol (ether).
Patent GB-477379-A (GB)
Title: Improvements relating to signs
IPC: G09F13/00
Filed: 1936-03-23
Abstract: 477,379. Signs. BECK, C. March 23, 1936, Nos. 5420 and 23868. [Class 3 (ii)] A sign plate c, Fig. 2, indicating the name or number of a house, is supported by a frame b at the front of an illuminated casing a mounted within a cavity in a brick wall. The frame is secured by screws d engaging lugs a<1> on the casing, and is of such a shape as to form a border around the edges of the sign plate and cover the joints between the front edges of the casing and the surrounding brickwork. The plate c is positioned within a surrounding flange b<1> on the frame b and secured by putty or the like e. In a modification, Fig. 3, the plate is held against the frame by members j pivotally mounted in the flanges b<1>. In another arrangement, Fig. 5, the plate c is slid into grooves formed in flanges b<3> secured to the frame b, and positioned by a vertical flange b<4> at one side of the frame.
Patent GB-312135-A (GB)
Title: Improvements in hinges
IPC: E05D3/02
Filed: 1928-02-21
Abstract: 312,135. Regan, E. A. Feb. 21, 1928. Barrel and cylindrical hinges comprise attachment plates 4, 4a, Fig. 1, located at different portions of the pintle 8, and narrow plates 2 that connect the plates 4, 4<a> with the knuckle socket members 3, the plates 4, 4a being laterally offset at 7 to form an aligning gauge and to cause the attachment plates to swing into the same plane when folded. The attachment plates extend longitudinally of the hinge pin in opposite directions from a common point on the pintle, and the plates 4, 4a are offset from the plane of the plates 2 by substantially one-half of the thickness of the metal of the plates. The socket members of each attachment plate extend the full length of the pintle, as shown in Fig. 1. In a modified construction, the pintle is less than the combined length of the attachment flaps.
Patent GB-1207991-A (GB)
Title: Improvements in or relating to the packaging of articles
Inventor: MILTON WILLIAM FRANK
IPC: B65D81/113
Filed: 1967-02-04
Abstract: 1,207,991. Injection moulding; laminates. PRICE BROS. & CO. Ltd. 5 Feb., 1968 [4 Feb., 1967], No. 5480/67. Headings B5A and B5N. A protective casing for an article is produced 'by injecting a curable plastics foam material, e.g. urethane foam, into a mould lined with a more flexible plastics material, e.g. polyurethane foam, the injected material when cured bonding to the lining material. A cavity in the casing to receive the article is produced either by machining the moulded body or by placing the article or a correspondingly shaped body into the mould before the injection step. The casing may be formed in two parts so that when the parts are assembled face to face, the resultant single cavity receives the article.
Patent GB-193868-A (GB)
Title: Device for the automatic control of fuel flow from the jet in carburettors of internal combustion engines
IPC: F02M7/02
Filed: 1923-02-26
Abstract: 193,868. Memini, G. Feb. 25, 1922, [Convention date]. Spray carburettors.-The flow of fuel through the nozzle decreases progressively and proportionally as the suction upon the nozzle outlet increases. The nozzle 4, which discharges into the throat of a Venturi passage 7, is fed from the float chamber 1 through a passage 2 and constricted orifice 3 which discharges into a chamber 10. This chamber communicates with the nozzle through a relatively large conduit 5 forming part of an annular passage 5<1>, 5<11>, 5<111> of which the part 5<111>, which connects with the chamber 10, is of relatively smaller bore. The annular passage may communicate with the atmosphere through an aperture 6. At small throttle openings the chamber 10 and passage 5<1> become emptied of fuel. With an increased opening, suction tends to draw more fuel through the orifice 3, but this is prevented by an antagonistic suction and consequent eddies set up in chamber 10 through the annular passage 5<1>, 5<11>, 5<111>. The effect of the hole 6 is to delay and modifv the action of this antagonistic suction.
Patent GB-1240986-A (GB)
Title: Improvements to dipperstick assemblies
Inventor: PILCH JOHN STEPHEN
IPC: E02F3/30
Filed: 1970-02-05
Abstract: 1,240,986. Bucket-carrying dipper stick assemblies. WARE MACHINE WORKS Inc. 5 Feb., 1970, No. 5585/70. Heading E1F. In a dipper stick assembly 20, 35 in which a bucket-carrying member 35 is slidable in a boom-mountable saddle 20 the two pistoncylinder units 49, 51 and 44, 45 for respectively moving the member 35 through the saddle 20 and pivoting the scoop 38 relative to the member 35 are located between the member and saddle and between the member and bucket tilting on the member so as to be located side by side on opposite sides of the centre line of the dipper stick.
Patent GB-793890-A (GB)
Title: Adjustable clamping means for the back rest of a chair or seat
Inventor: THOMPSON STANLEY HOWARD ADCOCK
IPC: A47C1/027
Filed: 1956-02-23
Abstract: 793,890. Seats. TAN-SAD CHAIR CO. (1931), Ltd. Nov. 19, 1956 [Feb. 23, 1956], No. 5637/56. Class 52(2) A chair back rest wherein the stem b supporting the back rest is slidable and tiltable with respect to the seat is fixed in position by a clamp which is fixed and released by means of a rockable member having a toggle link connection permitting of an overcentre fixing. The seat has at its rear parallel blades a supporting parts c<SP>1</SP>, c<SP>2</SP>, of a clamp, having a dovetail interlocking engagement c' and slidable and rockable by virtue of a slot c<SP>4</SP> engaging a transverse pin c<SP>5</SP> slidable in slots a<SP>1</SP> in members a. Part c<SP>1</SP> has teeth c<SP>6</SP> engageable with a serrated member d fixedly mounted between blades a by means of pins d<SP>1</SP>, d<SP>2</SP> and a toggle link e connects d<SP>2</SP> with the pin f<SP>1</SP> carried by a channel shaped rocking member f pivoted outside members a by pin c<SP>5</SP>, the arrangement being such that when member f is forced downwardly over a dead centre the parts of the clamp are forced together and on to member d to lock stem b at the desired height and inclination. In a modification (Fig. 3) a trigger g, having a nose g<SP>3</SP> engageable with a cam d' on member d, is provided and has a finger operable part g<SP>1</SP>.
Patent GB-1132622-A (GB)
Title: Improvements in transistor amplifier circuits
IPC: H03F3/30
Filed: 1966-02-09
Abstract: 1,132,622. Transistor amplifying circuits. RADIO CORPORATION OF AMERICA. 9 Feb., 1966 [8 March, 1965], No. 5649/66. Heading H3T. In an amplifier comprising a driver stage 56 transformer coupled to a single-ended pushpull output stage, comprising series-connected transistors 26, 28, the primary winding 58 of the driver transformer is returned to the common point 34 of the output transistors. The transformer windings 58, 46, 48 are so poled that the connection provides positive feedback at signal frequencies and permits the use as driver of a transistor having a lower reverse voltage breakdown characteristic. The driver stage 56 is direct coupled to an input stage 66, overall negative feedback being provided via resistor 76 to prevent instability. Part of the collector current of the driver transistor 56 may be by-passed from the output stage by connecting a resistor from the collector to the supply line (Fig. 2, not shown); alternatively, all the collector current of transistor 56 may be taken from the supply line direct, terminal 84 of the transformer being connected via a resistor thereto and to terminal 34 via a capacitor (Fig. 3, not shown).
Patent GB-765762-A (GB)
Title: Improvements in puncture-sealing pneumatic article
IPC: B29C73/00
Filed: 1955-02-25
Abstract: A pneumatic article such as a tubeless tyre or tyre tube is rendered self-sealing by a layer of puncture sealant comprising a major proportion of an unvulcanizable rubbery material, such as raw butyl rubber or polyisobutylene, mixed with a minor proportion of polychloroprene rubber (neoprene) which is cured with from 0.25 to 5 parts of an acidic metal halide.  The mixture may comprise 80 to 97.5 parts of raw butyl or polyisobutylene and 20 to 2.5 parts of neoprene, the polyisobutylene having a molecular weight of from 60,000 to 100,000.  In preparing the mix, from 0.25 to 5 parts of the vulcanizing agent for the neoprene such as tin or iron chloride, is added together with 20-150 parts of a filler such as carbon black, clay, mica, calcium carbonate, precipitated hydrated silica or calcium silicate, zinc oxide, diatomaceous earth or wood flour.  From 8 to 50 parts of a non-migratory plasticizer such as mineral or rosin oil, polybutene, or polyterpene or paracoumarone-indene type synthetic resins may be added to the mix.  Specifications 733,088 and 748,117, [Group V], are referred to.
Patent GB-1041653-A (GB)
Title: Flexible suction cups
IPC: B66F9/18
Filed: 1964-02-11
Abstract: 1,041,653. Suction grippers on lift trucks. HYSTER CO. Feb. 11, 1964 [April 22, 1963], No. 5661/64. Heading B8H. A suction cup constituting part of a suction gripper on a lift truck comprises a body 11 of elastomeric material formed with flexible inner and outer lips 19, 21 and having a closed coil spring 17 embedded in the marginal portion, the spring permitting the marginal portion to expand when in contact with a load but preventing contraction of the marginal portion beyond that shown in Fig. 3. The area of the cup within the lip 19 is sufficient to support the load under normal conditions, but if the load is increased suddenly, as when the truck runs over uneven ground, and the lip 19 is torn away from the load, the outer lip 21 remains in engagement with the load and the effective cup area is increased. A valve body 13 is partially embedded in the body 11 and contains a valve which closes when the flow of air therethrough reaches a predetermined rate when the cup is not in engagement with a load. In a modification, Figs. 6, 7 (not shown), the spring 17 is replaced by a series of vertical discs arranged in a circle around the marginal portion of the cup.
Patent GB-1376459-A (GB)
Title: Method and apparatus for carbon dioxide snow separation
IPC: C01B32/55
Filed: 1972-02-08
Abstract: 1376459 Separation of carbon dioxide snow from vapour CHEMETRON CORP 8 Feb 1972 [8 Feb 1971] 5846/72 Heading BIT [Also in Division P4] A mixture of carbon dioxide snow in CO 2  vapour, produced by passage of liquid carbon dioxide from source 12 through orifice 32, flows via conduit 44 through curved conduit 50, and the snow, which concentrates towards and moves along the lower curved wall is deflected by blade 60 through an orifice in the wall so that the snow is discharged into box B, which may contain foodstuffs to be refrigerated. The size of orifice 32 should be regulated such that the pressure within the inlet end of conduit 40 is maintained between 5 and 60 p.s.i.g. The back pressure of the vapour in the outlet conduit 48 is maintained above atmospheric pressure but preferably below 20 p.s.i.g. by means of a discharge means 74 of reduced cross-section. The proportion of granular particles in the flaky particles of carbon dioxide snow depends upon the rate at which the liquid CO 2  is flashed. The formation of frost on blade 60 is prevented by an external electric resistance heater 72. When desired, a second separation conduit may be series-connected to the outlet end 46 of the apparatus shown.
Patent GB-1202778-A (GB)
Title: Improvements relating to flight aid systems
Inventor: COX JOE
IPC: B64C1/00
Filed: 1968-02-06
Abstract: 1,202,778. Controlling aircraft. FERRANTI Ltd. 31 Jan., 1969 [6 Feb., 1968], No. 5859/68. Heading B7G. An aircraft, in particular a helicopter, having a control column 11 connected to rotor blade pitch control mechanism by two substantially parallel control rods 16 which when moved in unison control the helicopter about the pitch axis and when moved differentially effect control about the roll axis, is provided with an autostabilizing system. The system includes for each of the said two control rods an actuator 15 energized by a signal from a rate gyro 19 which feeds a signal to be summed with a feedback signal from actuator 15 into a computer 17 the output signal from which is amplified at 18. In contradistinction from conventional systems in which the sensitive axes of the rate gyros are respectively parallel to the pitch and roll axes, in the invention the sensitive axes of each gyro 41 and 42 is inclined at the same angle a on opposite sides of the roll axis 43, Fig. 4, so that both gyros respond to pitch and roll movements of the helicopter.
Patent GB-1217582-A (GB)
Title: Improvements in or relating to laser assemblies
IPC: H01S3/093
Filed: 1968-02-06
Abstract: 1,217,582. Lasers. AMERICAN OPTICAL CORP. 6 Feb., 1968 [6 March, 1967], No. 5879/68. Heading H1C. A laser assembly comprises a laser glass rod embedded within a cladding glass which partially surrounds a pump flash tube. A unitary elongated main body structure 14 comprises a laser rod 21 of trivalent neodymium-doped barium crown laser glass, or a ytterbium-neodymium doped glass or an erbium-ytterbium-neodymium doped glass clad by glass 22 which has substantially the same refractive index as the laser glass and is chosen so as to be highly transparent to optical energy at the pumping wavelengths. The cladding glass may be doped so as to have good absorbing characteristics for optical energy at the laser emission wavelength and it also acts to conduct heat away from the laser rod. A concavely curved polished recess is provided along the entire length of the main body structure 14 and a flash tube 16 is fixed therein by a thin layer of epoxy cement, a small amount of liquid being provided between the laser cladding and flash lamp to provide good heat conductivity. A first silver reflecting layer 18 is positioned around the assembly of main body structure and flash lamp to reflect light from the flash lamp on to the laser rod and also to conduct heat away from the cladding. A second heat conducting layer of copper 19 is positioned in intimate contact with the first layer. The assembly may be provided with an outer housing, Fig. 5 (not shown), through which a liquid coolant flows. Although the layers 18, 19 may be coated on the laser assembly they may be provided with flanges which are releasably held together, Fig. 6 (not shown), so as to facilitate removal of the flash lamp.
Patent GB-739457-A (GB)
Title: Improvements in or relating to electric circuits for electric discharge lamps
IPC: H05B41/232
Filed: 1954-03-01
Abstract: 739,457. Supply systems for space discharge apparatus. CONCORDIA ELECTRIC SAFETY LAMP CO., Ltd., and STEADMAN, C. H. March 1, 1954, No. 5910/54. Class 38 (4). A supply circuit for a filamentary electrode discharge lamp 10 comprises three inductance coils 18 ... 20 wound on a common core, not shown, the first and second coils 18, 19 being serially connected between one supply lead 23 and one terminal 13 of one lamp filament 11, the third coil 20 being connected between one terminal 16 of the other lamp filament 12 and the common connection of two capacitors 30, 31 of which capacitor 30 is connected to the junction 21 of coils 18, 19 and the capacitor 31 is connected to terminal 14 of filament 11, and the other lamp filament terminal 15 being connected to the other supply lead 25. The capacitor 30 corrects power factor and is said to provide a high lamp starting voltage in coils 18, 19. Capacitor 31 is partially resonant with coil 20.
Patent GB-964368-A (GB)
Title: Improvements in machines for finishing toothed elements
IPC: B23F19/06
Filed: 1962-02-15
Abstract: 964,368. Gear &c. finishing. MICHIGAN TOOL CO. Feb. 15, 1962 [March 27, 1961], No. 5918/62. Heading B3K. A machine for finishing splined work and gears 14 comprises a tool-head 18 including a rotatable and reciprocable shaving or abrading tool 16 for meshing with the work, a hollow shaft 26, a shaft 52 rotatable with, and slidable in, the bore 46 in shaft 26, means for rotating the shafts, and means 70, 76 for reciprocating shaft 52 in the bore 46 upon rotation of the shaft. The work is mounted, between a headstock 10 and a tailstock 12, on a table 8 supported on a carriage which for some work may be reciprocated longitudinally of the bed 6. A support 20 holding the tool on an axis crossed relative to the work-axis, is movable transversely of the table 8. The support 20 is mounted on rolls and is counterweighted to maintain a constant pressure between the tool and work. A reversible, variable-speed drivemechanism in the support drives the spindles, and the drive may be reversed each time the traverse-direction of the table 8 is reversed, by a control system in a cabinet 22. If the table is not reciprocated, a timer may reverse the tool-drive at predetermined intervals. Drive for the shafts 26, 52 is through bevelgears 38, 40 on to shaft 26, which is splined at 51, 56 to the tool-shaft 52. Short-stroke axial vibrations are applied to the shaft 52, by an abutment 76 on the tool-head engaged by a disc 70 fixed by a screw 72 to the end of the shaft 52 and having one or more cam lobes 74. The leading and trailing faces of the lobes 74 may be similar, or the leading face may be of gradual slope and the trailing face steeply inclined, providing for a quick return of the shaft 52, by means of a spring 48 acting between the shafts 26, 52. A cutting fluid may be supplied to the work, and the tool may have an abrasive coating or embedded abrasive grains.
Patent GB-993391-A (GB)
Title: Copolymerisation of trioxane
IPC: C08G2/00
Filed: 1964-02-12
Abstract: Trioxane in the solid phase is copolymerized with a cyclic ether in the presence of a cationic polymerization initiator. Specified cyclic ethers are ethylene oxide, 2,2-bis-chloromethyl oxacyclobutane, 1,3 - m - dioxane, 1,3-dioxolane, and beta-propiolactone.  Lewis acids, e.g. boron fluoride, its complexes and stannic chloride are specified initiators while the polymerization may be continuous or batchwise. The polymerization may take place in a liquid in which the trioxane is not soluble, in the vapour phase or in the molten state.
Patent GB-769991-A (GB)
Title: Improvements in or relating to load lifter attachments for tractors
Inventor: CHAMBERS JOHN MALET
IPC: E02F3/36
Filed: 1950-03-09
Abstract: 769,991. Load-handling machines. MASSEYHARRIS-FERGUSON (SALES), Ltd. March 9, 1951 [March 9,1950], No. 6012/50. Class 78(3). A load-lifting attachment for a tractor comprises a pair of laterallyspaced beams 7 which are connected to the tractor by pivots 8 and are curved in side elevation to such an extent that hydraulic lifting rams 10, 11 of considerable length can be used to raise them. The pivots 8 are received in spaced apertured lugs 19, Fig. 6, secured to the ends of a box-section beam 16. Channel members 21 and angled closure strips 22 are welded together and to the ends of the beam 16. Apertured sleeves 23 welded to the lower ends of the members 21, 22, and sleeves 24 secured to the top of the rear axle casing 27 receive pins for securing the parts together. The beam 16 has welded thereto a strip 28 having pins 29 for detachable connection with an apertured plate secured on top of the tractor casing. The pistons 10 of the rams 11 are pivoted to the beams at the deepest part of their cross-section and the cylinders 11 are pivoted to a transverse member 12 secured to the underside of the tractor casing 13. The member 12 consists of a forged beam 30A, Fig. 9, having end pivot pins 30B for mounting the lifting cylinders. Connector plates 30, each having pins 31, 31A of unequal length, project upwardly from the top of the beam. Complementary hanger plates 32 permanently attached to the tractor casing project downwards and have holes formed in them for receiving the pins. The pins are retained in position by cotter pins 31b having spring-retaining rings 33 of known type. The beams 7 are formed of upper and lower single metal pressings 7A, Fig. 3, which may be formed with flanges 7D. These flanges are connected by spot welding. If the flanges are dispensed with, the parts are connected by a continuous weld. The beams are connected near their front ends by a frame 14 of generally cruciform shape consisting of a bent member 34 and two members 35, these members being connected together and to the beams by welding. Specifications 470,069, [Group XXXI], 665,827, [Group XXXII], and 769,992 are referred to.
Patent GB-1109988-A (GB)
Title: A transparent plastic light transmitting element for a light signal device
IPC: F21V5/00
Filed: 1967-02-08
Abstract: 1,109,988. Indicator lamps. EUROMATION ANSTALT. 8 Feb., 1967 [16 Feb., 1966], No. 6016/67. Heading F4R. The light transmitting cap 1 of a signal lamp has frusto-conical surfaces 2, 3 on the outer side, the surfaces of which are so inclined that lateral light from a bulb within the cap is totally reflected. The cap 1 has a hemispherical end 7 and a cylindrical body 6, a plane surface 8 at right angles to the axis extending from this to the outer edge of the surface 3. A similar surface 5 connects the body to the outer edge of the surface 2 which may be made up of two surfaces 2a, 2b of different slope.