baber/WOPTO huggingface dataset:
Patent GB-1431433-A (GB)
Title: Circuits for providing an output to a line
IPC: H03F3/34
Filed: 1972-06-29
Abstract: 1431433 Amplifying circuits; interference suppression DOLBY LABORATORIES Inc 18 June 1973 [29 June 1972] 30541/72 Headings H3T and H4R In an arrangement comprising an amplifier 16, Fig. 1, for feeding a line 18 which may be connected to ground G2 at terminal 22 of the load 19, a resistor R1 is connected between line input terminal 14 and amplifier ground G1. There is developed in resistor R1 a voltage approximately equal to the voltage developed in the earthy side 18b of the line 18 by noise and hum and a positive feedback loop is provided to the input of the amplifier 16 by way of circuit 20 of gain B and combining circuit 15, the loop gain being arranged to be close to unity; it is shown in the Specification that this results in the noise and hum being balanced out. Phase correcting circuits for low and/or high frequencies may be included in the feedback loop. In an embodiment, the circuit 20 and combining circuit 15 are combined, being provided by transistors Q1, Q2, Q3, Fig. 2: the loop gain is set by choice of a resistor R4, while capacitor C3 and resistor R5 compensate for phase-shift. The incoming signal is fed to the base of transistor Q3, while the output of the combining circuit is fed to the input of amplifier 16 via an emitter-follower Q4.
Patent GB-280377-A (GB)
Title: Improvements in mercury, or other vapourizable metal, lamps or rectifiers
IPC: H01J13/02
Filed: 1926-12-02
Abstract: 280,377. Reynolds, F., and Slater, W. T. Dec. 2, 1926. Low - pressure metallicvapour apparatus. - In a rectifier having three electrodes consisting of mercury or other vaporizable metal or alloy, arranged so that when the rectifier is tilted the mercury &c. forming two anodes 4 flows and makes contact with the cathodes 5, and when the rectifier is restored to the normal position mercury flows back to the anodes in equal parts, to strike the arc, a chamber 11 for cooling mercury and vapour is arranged above each electrode, and condensed mercury &c, is lead back to the lower part of each electrode through a tube 15. Annular wells 13 are formed in the chambers 11 to collect condensed mercury &c. The chambers 11 may be cooled by air or water, and provided with jackets of metal, hard glass or quartz; the chambers above the anodes may be combined to form a vessel of inverted U-shape. The cathode reservoir is made partly conical in shape so as to maintain equilibrium between the rates of vaporization and condensation; the anode reservoirs may be of similar shape. Specification 256,813 is referred to.
Patent GB-427977-A (GB)
Title: Manufacture of dyestuffs of the oxazine series
IPC: C09B19/02
Filed: 1933-11-03
Abstract: Dyestuffs of the oxazine series are obtained by heating in a high boiling solvent quinones of the formula <FORM:0427977/IV/1> wherein X is hydrogen, halogen or alkyl and R an aromatic radicle. The formation of the oxazine may be effected in the presence of a metallic chloride or oxidizing agent or both as in Specification 8886/12 or 313,094, [both in Class 2 (iii)], or the high boiling solvent may contain an acylating agent as in the process of Specification 420,683.  By using a sulphonating agent to assist ring formation, sulphonation is simultaneously effected.  The sulphonated dyes which may be used for dyeing cotton or silk yield insoluble salts suitable as pigments.  The unsulphonated dyes may also be used as pigments for colouring rubber and caoutchouc. During sulphonation, the acylamino group, e.g. the toluenesulphamino group may be wholly or in part removed.  In examples: (1) the condensation products of chloranil with monoacetyl-1 : 4- or -1 : 3-diaminobenzene, monobenzoyl-1 : 4-diaminobenzene or monoacetyl-4 : 4<1>-diaminodiphenyl are heated in nitrobenzene in the presence of benzoyl chloride or ferric chloride; (2) the products from trichlortoluquinone and monoacetyl-1 : 4-diaminobenzene and from quinone and monoacetyl-1 : 4-diaminobenzene are condensed as in the previous example; (3) the product from chloranil and monoacetyl-1 : 4-diaminobenzene is boiled in trichlorbenzene in the presence of sodium nitrite and benzotrichloride.  Samples have been furnished under Sect. 2 (5) of the following dyestuffs: (a) the oxazine derived from chloranil and monoformyl-1 - 4-diaminobenzene; (b) the dyestuff obtained by sulphonating the oxazine (a); (c) the dioxazine derived from chloranil and 3-amino-6-acetylamino - N - ethylcarbazol; (d) the dyestuff obtained by sulphonating the dioxazine (c).  3 - Amino - 6 - acetylamino - N - ethylcarbazole may be prepared by nitrating N-ethylcarbazol, reducing, acetylating the resulting 3-nitro-6-amino-N-ethylcarbazol and reducing the product. Specification 367,389 also is referred to.  The Specification as open to inspection under Sect. 91 comprises also the formation of oxazines from quinones having the above general formula in which X is aryl. In a further example, the condensation product from tetrabromquinone and monoacetyl-1 : 4-diaminobenzene is subjected to ring formation. Examples forming the subject-matter of samples (a) and (c) are also included.  This subject-matter does not appear in the Specification as accepted.
Patent GB-316480-A (GB)
Title: Apparatus for sharpening pencils and the like
IPC: B43L23/08
Filed: 1928-10-23
Abstract: 316,480. Olberg, A., and Singer, E. Oct. 23, 1928. Pencil sharpeners.-A pencil sharpener using razor blades of the double-edged type comprises a conically bored guidesheath 1 with a lateral extension 2 upon which the blade. 6 is held by a clamping-plate 7 and a screw 4 passing through the central hole, in the blade and coincident apertures in the plate 7 and extension 2, the plate 7 being provided on its underside with two spaced studs 8 which fit closely within the outer holes of the blade and extend into depressions 5 of larger diameter in the portion 2. The screw 4 also fits closely within the central holes of the cover plate and blade and is a, loose fit within the extension 2, thereby enabling the position of the cutter-edge of the blade to be varied relatively to the pencil. A nut at the end of the screw 4 is located beneath the extension 2. To adapt the sharpener for pencils of small diameter a removable bush 12 may be inserted in the end of the conically bored sheath 1. An offset extension 10 along the rear edge of the cover plate 7 protects the fingers,of the user against cutting by the rear edge of the blade. The portion 2 and the attached guide-sheath may be removed and the blade clamped upon the plate 7 to enable the device to be used as a knife for trimming paper &c.
Patent GB-729346-A (GB)
Title: Improvements relating to cookers or refrigerators
Inventor: FELTON FREDERICK DUDLEY
IPC: F24C15/08
Filed: 1952-12-04
Abstract: 729,346. Cookers. REVO ELECTRIC CO., Ltd. Nov. 30, 1953 [Dec. 4, 1952], No. 30741/52. Class 126. [Also in Group XIII] In a refrigerator or cooker the storage compartment or oven is welded to the door frame this frame being a rearwardly directed flange integral with the front panel of the outer shell of the appliance. In the cooker shown the outer shell is of sheet metal and comprises a front panel a<SP>1</SP>, side panels a2 and partial panels a3 at the rear bridged by a plate b. Alternatively the portions a<SP>3</SP> may be of such length that they overlap. The panel a<SP>1</SP> is formed with pressedout apertures a<SP>4</SP>, a<SP>5</SP>, the pressing operation being such that surrounding flanges a<SP>6</SP>, a' are formed to the former of which an open-topped hot cupboard c is welded and to the latter of which an open-fronted box-like oven d is welded at the top and both sides of the aperture a4. Doors close the apertures a4, a<SP>5</SP> and a hot plate covers the compartment c.
Patent GB-1432366-A (GB)
Title: Pattern printing apparatus
IPC: B41J2/155
Filed: 1972-06-30
Abstract: 1432366 Selective printing IMPERIAL CHEMICAL INDUSTRIES Ltd 5 June 1973 [30 June 1972] 30794/72 Heading B6F [Also in Division H4] The apparatus differs from that disclosed in the patent Specification 1,354,890 insofar as drops which are directed to the gutter carry a charge whose voltage lies outside the range of voltages encompassed by the staircase function.
Patent GB-1133498-A (GB)
Title: Improvements in or relating to tensioning and anchoring means in prestressed concrete constructions
IPC: E04C5/12
Filed: 1966-07-08
Abstract: 1,133,498. End anchorages for prestressed concrete. M. R. ROS. 8 July, 1966, No. 30897/ 66. Heading E1W. The load on an end anchorage in a moulded prestressed concrete construction is transmitted to the concrete by steel piles 8 arranged in parallel with, or at a slight angle to, the axis of the tensioning means 1. As shown, wires having upset heads are supported in a perforated anchor block 6 which is supported in turn, in the mould or steel beams 7 having the piles 8 secured thereto. The wires pass through a sheath 3 with end flanges, and end slots 4 (Fig. 1, not shown) through which the beams 7 pass. External helical reinforcement 10 is also used around the end anchorage. The block may be of trapezoidal section, as shown, or of rectangular section, when steel spacer blocks 13 (Fig. 5, not shown) are employed, or may be circular in plan with a threaded or a flanged periphery (Fig. 8, not shown), the beams being replaced in the latter examples by rings 16a or 16b respectively.
Patent GB-767107-A (GB)
Title: Improvements in and relating to machine tool spindles having collets to receive work-pieces
IPC: B23B31/00
Filed: 1953-11-09
Abstract: 767,107. Chucks. MURAD, W. H. Feb. 9, 1955 [Nov. 9, 1953], No. 30942/53. Class 83 (3). A spindle 11 for a machine-tool comprises a collet 12 centred in the nose-piece 10, an axially-movable sleeve 13 surrounding the collet for operating it, and swarf-clearance passages 14 extending, at right-angles to the spindle axis, from the space between the nosepiece 10 and the collet to the exterior of the nose-piece to clear swarf by centrifugal action. The Provisional Specification describes also a construction in which the passages radiate from the corners of a space of triangular shape.
Patent GB-1120102-A (GB)
Title: Door-closer
IPC: F16F9/48
Filed: 1965-07-21
Abstract: 1,120,102. Door closers and checks. DICTATOR DEURSLUITER MAATSCHAPPIJ N.V. 21 July, 1965 [21 July, 1964], No. 30995/65. Heading E2M. A door closer combined with a hydraulic check device comprising a piston 2 loaded by a spring 6 and sliding in a cylinder 1 has the stroke of the piston adjusted by screwing the piston up or down on the piston rod 3. The top of the rod 3 has a screwdriver slot 15 to facilitate the adjustment and a hole 20 in a cross bolt 18 is in line with a bore 17 in the head 16 in one position of the door so that the adjustment is possible. The bore of the cylinder is tapered downwardly. The lower end of the spring is secured in a groove 13 in the piston. A one-way valve 9 is provided.
Patent GB-154459-A (GB)
Title: Improvements in and relating to cinematograph screens
IPC: G03B21/62
Filed: 1919-12-12
Abstract: 154,459. Marks, W. J. Dec. 12, 1919. No Patent granted (Sealing fee not paid). Optical-projection apparatus.-Screens for use with optical-projection apparatus consist of a network of opaque or semi-opaoue fibrous material coated with a translucent material formed to present to the spectators nodules which are each framed within an aperture of the network. The network may have apertures of uniform size and shape, for example, rhomboidal, hexagonal, or triangular, and may be so manufactured that the predominating strength exists diagonally. The network may be dyed violet and may consist of butter cloth. The translucent material may be wax or celluloid, and the nodules may be pyramidal conoidal or paraboloidal in form.
Patent GB-662752-A (GB)
Title: Improvements in rotary-wing aircraft
IPC: B64C1/00
Filed: 1948-12-01
Abstract: 662,752. Helicopters. SOC. NATIONALE DE CONSTRUCTION AERONAUTIQUES DU SUDEST. Dec. 1, 1948 [Dec. 12, 1947], No. 31164/48. Class 4. A rotary wing aircraft with inherent stability is characterised in that it comprises at least two portions swivellingly interconnected about a common swivelling point for allowing relative swivelling movements of the portions in all directions under the action of a disturbance in the state of balance thereof, and means for simultaneously connecting each pair of such portions for limiting the relative movements thereof. As shown in Fig. 1 a helicopter comprises an engine and rotor portion having a centre of gravity 2 and a fuselage having a centre of gravity 3, the two portions being swivellingly connected at 1. In the embodiment shown in Fig. 5 the engine 11 is carried by a fork 13 pivoted in bearings 14 on a mast 10 attached to the fuselage. Devices 15, 16 comprising fluid, spring or inertia operated means (Figs. 6-8, not shown) are connected between the two portions to resist relative movement thereof.
Patent GB-1087402-A (GB)
Title: Improvements in or relating to reinforced building boards or panels
Inventor: BLOOM MARTIN S
IPC: E04C2/22
Filed: 1963-08-07
Abstract: 1,087,402. Building panels. IMPERIAL CHEMICAL INDUSTRIES Ltd. July 9, 1964 [Aug. 7, 1963], No. 31166/63. Heading E1B. A building panel comprises a matrix of foamed material - e.g. foamed plaster, foamed concrete or foamed plastics -cast around a metal reinforcement grid composed of a pair of transverse channels, rods, strips &c. connected by a plurality of longitudinal tubes, channels strips &c. The panel may have a premoulded jacket of polyvinyl chloride. Preferably the embedded reinforcement comprises a pair of aluminium channels interconnected by aluminium tubes.
Patent GB-1144177-A (GB)
Title: Improvements in clamping devices
IPC: B25B5/10
Filed: 1966-07-12
Abstract: 1,144,177. Clamping - dogs. W. R. ANDREWS. 12 July, 1967 [12 July, 1966], No. 31227/66. Heading B3B. A clamping device has a member 10 threaded on a heel adjusting screw 9 in order to provide adjustment of the height at which the heel end of a slotted clamping member 4 is supported, the member 10 having a forwardly extending portion providing a support for the clamping member 4 when the latter is slid away from the workpiece 3 to the position shown dotted. The clamping bolt 2 passes through a hole 10b in the member 10 and the latter has a part cylindrical surface 10c where it contacts the underside of the clamp member 4.
Patent GB-304871-A (GB)
Title: An improvement in the manufacture of boots and shoes used for football, hockey, cricket, lacrosse and kindred sports
IPC: A43B5/00
Filed: 1927-11-22
Abstract: 304,871. Law, G. T. Nov. 22, 1927. Athletic boots. - A metal or fibre plate with perforations corresponding in position to the studs secured on the outer sole of a football or like sports boot, and which are only slightly less in diameter than the base of such studs, is secured between the inner and outer soles. The plate may cover the forepart only of the boot, as shown, or it may be in two parts and cover the sole, waist, and heel, and the nails or rivets, which secure the studs, pass through and engage the inner and outer soles.
Patent GB-652979-A (GB)
Title: Improvements in the suspension of compasses and other nautical instruments
IPC: G01C17/06
Filed: 1948-12-04
Abstract: 652,979. Compasses. GILLIE, J. W. Dec. 4, 1948, No. 31411. [Class 97 (ii)] Compass bowl suspensions comprising the combinations of springs and links described in Specifications 15493/07, [Class 97], 117,141, [Class 97 (ii)], and 427,446 are utilized in four groups, preferably arranged with one pair in the " fore and aft " line and the other " athwartships," the vibrational periodicity of each spring group being different from that of its opposing pair in order to reduce oscillations.
Patent GB-688689-A (GB)
Title: Improvements in or relating to electric bus-bar duct systems
IPC: H01R41/00
Filed: 1949-12-07
Abstract: 688,689. Collectors. PRUDEN, D. C. Dec. 7, 1950 [Dec. 7, 1949], No. 31444/49. Class 38 (i). A bus-bar duct system comprises a duct 3 having a longitudinal aperture 6 on one side, bus-bars arranged on either side of the aperture and insulated from the duct and a collector having contacts slidable on the bus-bars and carrying a roller or rollers engaging the duct for earthing the collector. The aperture 6 is contained in a groove 8 and is off-set therein to polarize the collector, the channels 9 formed by the groove and side walls of the duct containing two triangular-shaped bus-bars 13, 14. The collector, Figs. 3 and 4, comprises a plate 18 carrying triangular contacts 19 spring-urged into engagement with the bus-bars. Supported by the plate on spring supports 18a and exteriorly of the duct is a frame 21 carrying rollers 22 which have enlarged portions 23 engaging in the groove 8 in the duct to guide the collector. Rectangular bus-bars may be provided engaged by U-shaped contacts on the collector. The latter may carry a three-pin socket for making connection to apparatus and may incorporate fuses. Junction boxes may be provided in the duct into which other ducts running at right angles may be plugged. More than two busbars may be provided.
Patent GB-465574-A (GB)
Title: Process for the preparation of stable colloidal sulphur from elementary sulphur and sulphurous anhydride
IPC: C01B17/10
Filed: 1936-11-17
Abstract: Colloidal sulphur is obtained by rapidly treating a solution of polysulphides obtained by dissolving sulphur in caustic alkali, and which has been freed from solid sulphur particles, with liquid sulphur dioxide free from oxygen and carbon dioxide, and maintaining the temperature below 60 DEG  C.  If desired, a protective colloid, such as a gum, which is not deleteriously affected by alkali, sulphur, sulphur dioxide or hydrogen sulphide, may be added to the polysulphide solution before treatment.
Patent GB-479700-A (GB)
Title: An improved device for securing screws, bolts and the like
IPC: F16B39/34
Filed: 1936-11-18
Abstract: 479,700. Screw sockets. SIMMONDS, O. E., and SIMMONDS DEVELOPMENT CORPORATION, Ltd. Nov. 18, 1936, No. 31594. [Class 89 (i)] A device for securing bolts, screws, and the like to articles such as a metal block 14 comprises a sleeve 1 screw - threaded externally for engagement in a screwed hole 15 in the block 14 and internally for the reception of the bolt or the like, the sleeve being formed with a recess 2 in which is positioned a disc 3 of elastic material such as vulcanized fibre having a hole therethrough of less diameter than the threaded bore 4. In the form shown in Fig. 1, the disc 3 is retained against rotation by projections (i on the turned over end of the sleeve. Fig. 3 shows a modification in which the sleeve 1<1> is recessed at 16 and formed with an annular wall 7 between the turned over end 8 of which and upstanding projections 9 the disc 3 is secured. In a further construction, Fig. 5, the disc 3 is disposed intermediate the length of the sleeve 1<11> and is secured in position by a tubular distance-piece 10 and a projection 12 formed on the wall of the sleeve. Relative rotary movement between the sleeve and the block 14 may be prevented by the provision, on the outer end of the former, of a lug 13, Fig. 3, which, when the sleeve has been screwed into the hole 15, is forced into a recess provided in the face of the block.
Patent GB-1157095-A (GB)
Title: Improvements in or relating to Multiple Sockets
IPC: H01R12/72
Filed: 1966-07-14
Abstract: 1,157,095. Edge connectors for printed circuit boards. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 14 July, 1966 [17 July, 1965], No. 31618/66. Heading H2E. Each contact 11 of an edge connector comprises a springy metal (phosphor bronze) strip folded double along a terminal portion 13, its free end portions 15, 17 being bent to form rounded portions 24 for engaging a printed conductor on one face of an inserted panel 9, the rounded portions being tensioned by latching of their enlarged ends 29 (Fig. 2, not shown) and 33 behind ribs 31 formed on walls 3 which define contact-housing recesses 5 in an insulating body 1. Each contact 11 is retained by the respective engagement of a tongue 21, struck out of a terminal portion 13, and a bent portion 23 with the lower surface and an internal shoulder of the body 1, the terminal portion 13 serving as a soldering tag.
Patent GB-604250-A (GB)
Title: Improvements relating to handlebars for cycles and tricycles
IPC: B62K21/16
Filed: 1945-11-24
Abstract: 604,250. Cycles and tricycles. TWIGG & CO., Ltd., C., HOLLIS, T. R., and COOKLIN, L. Nov. 24, 1945, No. 31768. [Class 136 (iii)] A cycle or tricycle handlebar of the kind made in halves 1, 2, each of which is pivotally connected to the handlebar stem 8 so as to be adapted to be swung alongside the handlebar stem, has each of the parts 1, 2 secured by parts 4 to a semicylindrical cheek 3 which is pivoted to the stem 8. The coned ends of cheeks 3 are gripped by a sleeve nut 9 screwed on to a part 8<SP>x</SP> of the stem. The handlebar part 1 has a brake lever 11 with swivelling connecting member 13 pivoted at one end to a link 14 and at the other end to a rod 12 so that the brake accompanies the handlebar when it is folded. To fold the handlebar the sleeve nut 9 is unscrewed.
Patent GB-251589-A (GB)
Title: An improved means for flexibly connecting the wooden slats that are used in the construction of roller shutters
IPC: E06B9/11
Filed: 1925-12-16
Abstract: 251,589. Brady & Sons, Ltd., R. May 4, 1925, [Convention date]. Hinges readily separable about hinge pin; pinless hinges.-The slats of roller shutters are hinged by sheet-metal pieces 13 secured to the slats and provided at one end with a channel depression 17 from which extends a .tongue 14 and at the opposite end with a bent edge 18 and a slot 16. The tongue 14 is engaged with the slot in an adjacent connecting piece by sliding the pieces together while arranged at right-angle, so that the edge 18 lies in the channel 17, and when the tongue and slot register rotating the pieces into the same plane. The slat is hollowed to receive the channel 17. Both ends of one slat may have tongues and both ends of an adjacent slat may have slots. The connectors are secured to the slats by screws &c. and, if desired, punched out projections 21 which may be curved for strength. When the slats vary in width, the connectors are each cut into two pieces which are secured in correct position on the slats separately.
Patent GB-429479-A (GB)
Title: Improvements in or relating to flat bed printing machines
IPC: B41F27/04
Filed: 1934-11-06
Abstract: 429,479. Printing-surfaces. NELSON, I. T., Parkside Works, Dalkeith Road, Edinburgh. Nov. 6, 1934, No. 31830. Addition to 398,918. [Class 100 (ii)] In a printing-plate assembly as described in the parent Specification, the clamps are provided with perforations to receive spindles forming distance-pieces between the rows of plates. The clamps may be provided with depending necks terminating in shoulders whereby the clamps may be dropped into the guide grooves on the machine bed and then given a quarter turn to retain them in the grooves. In one form, Figs. 2 and 3, the clamps 2 are provided with perforations 46 to receive adjustable spacing spindles 35 provided with nuts 36 and capstan heads 37. The perforations are provided in neck portions 44 terminating in oppositely directed shoulders 45 engaging beneath undercut portions of the guide grooves 4 in the machine bed 3. In another form, Fig. 7, each clamp 21 is provided with a pair of spacing spindles 35 threaded through a bar 41 engaging one of the clamps. Specification 427,853 is referred to.