baber/WOPTO huggingface dataset:
Patent GB-235247-A (GB)
Title: Improvements in and relating to the production of dyestuffs or intermediates of the anthraquinone series and to dyeing thereby
IPC: C09B9/00
Filed: 1923-12-12
Abstract: Anthraquinone vat dyestuffs are reduced to their leuco compounds and caused to react with chloroformic ester, such as the ethyl or phenyl ester, or with phosgene.  The products, when decomposed by an alkali in the presence of a reducing agent such as sodium sulphide, yield vats which may be used for dyeing and printing.  According to examples, flavanthrone is reduced to the leuco compound with caustic soda solution and hydrosulphite, and treated directly with either ethyl chloroformate or a benzene solution of phosgene; an inert atmosphere is used; the products are filtered off, washed, and dried. Other dyestuffs specified are anthraquinone-1 : 2 : 21 : 11-hydroazine, dibenzanthrone, dimethoxydibenzanthrone, and dichlorisodibenzanthrone.  The Provisional Specification is not limited to the use of chloroformic esters or phosgene but refers to the use of compounds containing reactive halogen.ALSO:Anthraquinone vat-dyestuffs are reduced to their leuco compounds and caused to react with chloroformic ester, such as the ethyl or phenyl ester, or with phosgene.  The products, when decomposed by an alkali in the presence of a reducing agent such as sodium sulphide, yield vats which may be used for dyeing and printing.  According to examples flavanthrone is reduced to the leuco compound with caustic soda solution and hydrosulphite, and treated directly with either ethyl chloroformate or a benzene solution of phosgene; an inert atmosphere is used; the products are filtered off, washed, and dried.  Other dyestuffs specified are anthraquinone-1 : 2 : 21 : 11-hydroazine, dibenzanthrone, dimethoxydibenzanthrone, and dichlorisodibenzanthrone.  The Provisional Specification is not limited to the use of chloroformic esters or phosgene but refers to the use of compounds containing reactive halogen.
Patent GB-997609-A (GB)
Title: Improvements in or relating to cold frames and the like
IPC: A01G9/20
Filed: 1963-08-08
Abstract: 997,609. Garden frames. C. SANDERSON. May 26, 1964 [Aug. 8, 1963], No. 31304/63. Heading A1E. A frame comprises front and rear supports 13 to which are secured one or more dutch lights 11 one of the supports being provided with movable legs 16 adapted to be raised or lowered to lift or lower the supports and thereby increase or decrease ventilation of the frame. Each leg 16 is secured to the support by a loose bolt or rivet 17. The lights 11 are secured together by a hook and eye fastener 14, 15 and are connected to the supports by angle brackets 12.
Patent GB-1400076-A (GB)
Title: Article display device
IPC: A47F7/03
Filed: 1972-07-05
Abstract: 1400076 Article display stands F POVITZ 5 July 1972 31378/72 Heading A4T A display device for e.g. coins, stamp, comprises a coin-holder in the form of a e.g. solid plastics rectangular plate 1 having an aperture 10 tightly holding the coin between transparent windows 11, 12 or holding a transparent container holding the coin, the holder pivoting at one side between arms 4 on a rectangular cover 30 preferably tapering away from the pivots. The cover and holder may be pivoted through an angle between 270 and 360 degrees until a face of the holder abuts an edge of the cover, when the device may rest on the cover or holder as a base. The cover and holder may have projection engaging recesses to hold them in an intermediate pivoted position or the cover edge may engage a face of the holder to limit the pivoting onan angle between 90 and 180 degrees.
Patent GB-1262444-A (GB)
Title: Sheet registering apparatus
IPC: G03B27/14
Filed: 1970-06-30
Abstract: 1,262,444. Feeding sheets. XEROX CORP. 30 June, 1970 [3 July, 1969], No. 31605/70. Heading B8R.  Registering.-Sheets are fed as required either from a feed tray 34, Fig. 1, between guides 86, 87, Fig. 4, or from a secondary feed tray 35 between guides 91, 92 and thence by feed rollers 96, 97 and between guides 93, 94, 95, to a registering device 22 and thence to the transfer station D of a xerographic reproducing apparatus 10, the guide 95 being movable to allow access to the feed path. The registering device comprises register stop rollers 60, Figs. 2 and 4, each having a stop face 67 and initially stationary, so that a sheet is fed against the faces 67 and continued to be fed so as to be held against the faces, the guides allowing buckling of the sheet. Pressure rollers 69 are then raised against the rollers 60 under the control of a cam 122, and a cam 120 causes the rollers 60 to rotate with an acceleration which feeds the sheet towards the station D. When maximum velocity is reached, pressure rollers 68 are raised under the control of a cam 122 against rollers 70 continuously driven at said velocity, so that the sheet is fed by both rollers 60 and 70. The rollers 69 are then lowered, leaving the sheet to be fed by the rollers 70 only, and the rollers 60 are slowed and stopped and then returned to their initial stop position ready for the next sheet.
Patent GB-341532-A (GB)
Title: Improvements in steam dryer, or grit and dust extractor from air or gases and the like
IPC: B04C5/00
Filed: 1929-10-18
Abstract: 341,532. Centrifugal gas cleaners. MOYNAN, F. K. O., The Woodrows, Kingston-on-Soar, near Derby. Oct. 18, 1929, No. 31681. [Class 23.] An apparatus for extracting dust from gases, or for drying steam has helical vanes D, which gradually decrease in width from top to bottom, arranged between the outlet pipe C and the inverted bell casing B to cause the entering gas to whirl round the separator. The inner surface of the casing B is corrugated or ribbed; each rib has a radial face A<2> and an inclined face A<3>, a sharp edge being formed by the intersection of the two faces. The discharge outlet C for the clean gas is flared as shown. A cone-shaped bottom plate E is secured to lugs F on the casing B and the apex E<1> is arranged just within the outlet C. Ribs or vanes E<2> are formed on or applied to the upper side of the plate E, and extend close to the edge which is curved downwards. Many of the impurities and moisture particles are thrown against the ribbed surface of the casing B and pass to the outlet H ; the remainder are trapped by the vanes E<2> and pass over the edge of the plate E.
Patent GB-506380-A (GB)
Title: An improved electro-mechanical lock for the landing gates and doors of lift systems and the like
IPC: E05B65/00
Filed: 1937-11-18
Abstract: 506,380. Locking landing - gates of lifts &c. EXPRESS LIFT CO., Ltd., and ERIKSEN, J. Nov. 18, 1937, No. 31744. [Class 78 (iii)] [Also in Group XXV] A lift cannot be started unless the landing-gate is locked. The cross-pin 2 on the sliding bar carried by the gate is pushed through the opening 3 and enters the slot 14 of the pivoted bar 4 when the latter is in the dotted line position thus swinging it counterclockwise into the full-line position in which its cam-shaped nose obstructs the opening 3. During the movement, the tail of the bar forces a lever 8, pivoted at 15, rearwardly, so that the insulated stud 10 forces the pair of spaced contacts 9 out of the path of the bar 4. On the bar 4 attaining the full-line position, the spring 16 causes the member 8 to snap back under it and thus support it, at the same time completing the contacts 7, 9 to allow the lift to be started. Energization of the solenoid 18 swings the lever 8 clockwise to free the bar 4, thus allowing the latter to be swung down into the dotted line position to release the lock when manual effort is applied to the gate. The invention may also be applied to the gates and doors of vehicles, or compartments containing high-voltage apparatus.
Patent GB-968670-A (GB)
Title: Control systems utilising magnetic amplifiers provided with means for effecting bumpless transfer from manual to automatic operation
IPC: G05B7/02
Filed: 1960-09-15
Abstract: 968,670. Magnetic amplifiers. HAGAN CONTROLS Ltd. Sept. 15, 1960, No. 31751/60. Heading H3B. In a control circuit which may be switched to either automatic or manual control and in which automatic operation is effected over a magnetic amplifier 10, the manual switch position provides amplifier input control over resistor R1 and one feedback path over resistor R2 as well as an adjustable voltage E o  to the controlled load L.R., while the automatic switch position connects the amplifier directly to the load and provides an alternative feedback path over a condenser C1 and resistor R5, the change from manual to automatic operation being effected without severe transition effects by adjustment of potentiometers PA, PB respectively controlling the amplifier input and the load voltage E o  so that the amplifier output voltage E A  is equal to the load voltage. As shown, the amplifier comprises saturable cores 1Oa provided with a control winding 13, a feedback winding 33 and main windings 14-17, each with a respective rectifier 22-25, the main windings and rectifiers forming a bridge circuit in association with a centre-tapped power transformer 18 and resistors 27, 27a. For automatic operation the switch contacts 37-11 are closed in the AUTO position so that the amplifier applies a D.C. output directly to the load, the output voltage being determined by a reference voltage 11 and a variable voltage 12 both applied to the control winding. For manual operation the contacts MAN are closed and the load voltage E c  is provided by a potentiometer PB. A similar potentiometer PA, which may be ganged to PB, applies an additional controlling input to winding 13 over resistor R1, the circuit being made equivalent to that of potentiometer PB by the provision of a resistor R7 of the same value as the load LR. When changeover from manual to automatic operation is required the potentiometers PA arid PB are first adjusted until the voltages E A  and E c  are equal as indicated by a null voltmeter NM. A modification is described, Fig. 3 (not shown), in which the condenser C1 is isolated from R5 in the manual switch position and earthed. No charging time delay then occurs when adjusting the circuit components before changing from manual to automatic operation.
Patent GB-193936-A (GB)
Title: Improvements in or relating to machines for finishing the edges of sheet material, such as leather
IPC: C14B11/00
Filed: 1921-11-28
Abstract: 193,936. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Nov. 28, 1921. Sheet material, finishing edges of.- Relates to the finishing of edges of sheet material such as leather by the employment of a shrinking agent such as heat, as described in Specification 26300/12. In order to increase the curl in the edge of the leather effected by the shrinking action, an upstanding fin is produced on the edge and is bent or hammered over. The leather is fed intermittently over a table 13, Fig. 4, by upper and lower reciprocating feed-members 15, 17, and the edge, which may be skived, is bent upwards by the curved edge of a plough 19 opposite to which is a heated shrinking-tool 21, so that a thin fin is forced up between the tool and the plough. The fin is then bent over by a. hammer 25, Fig. 8, which strikes at an angle so as to give a wiping blow. The final position is as shown in Fig. 9, the fin adhering or not according to the nature of the leather. The work-table and feed-members are supported by a frame 29, Fig. 1, having an overhanging arm 30 which carries the shrinking-tool 21 and an adjustable presser-wheel 31. The arm 30 is pivoted and spring-balanced, and can be held in raised position by a latch. The tool 21 is U-shaped, and its lower surface is inclined in the direction of movement of the work. The tool is carried by two copper rods 57 adjustably supported in the arm 30 and connected to a transformer 81 by which the temperature can be regulated. The lower feed member is reciprocated in a slot in the work-table, and the upper feed-member receives a vertical as well as an horizontal movement, so that the work is gripped intermittently. The hammer 25 is operated through a spring 143 from an eccentric on the driving-shaft 113. Fumes are removed by a pipe 161 connected to a fan. The frame 29 is pivoted about one edge, and is held down by a latch 167. The Provisional Specification describes also means for varying the rate of feed comprising an actuating-lever containing a segmental slot in which is engaged a block connected to the feed-members, the feed being varied by adjustment of the block along the slot.
Patent GB-841343-A (GB)
Title: Improvements in or relating to low-pressure mercury vapour discharge tubes
IPC: H01J61/72
Filed: 1958-10-06
Abstract: 841,343. Discharge lamps. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 6, 1958 [Oct. 9, 1957], No. 31817/58. Addition to 835,183. Class 39(1). A low pressure mercury vapour discharge tube 1, preferably fluorescent, which in operation has a lowest external wall temperature of from 30‹C to 45‹C and a wall loading exceeding 50 mWs. per sq. cm., comprises at least one wall extension 5 intermediate the alkalineearth activated thermionic electrodes 4 and containing mercury 6, the radial size of the extension exceeding 20% of the radius of the tube and each electrode being surrounded by a chrome-iron disintegration screen ring 8, which is insulated from it. The screens 8 can contain from 15 to 35% by weight of chromium, preferably 24%. The extension 5 may be annular as indicated at 7. The rings 8 are supported from the pinches 2 by stay wires 9. The tube can have a filling of argon at approximately 0À8 mms. pressure and the wall loading can be approximately 74 mWs. per sq. cm., the temperature of the tip of the extension 5 being approximately 38‹C. The tube 1 can be provided with a layer of luminescent halogen phosphate with a colour temperature of about 4200‹C.
Patent GB-1392437-A (GB)
Title: Indicator arrangements
IPC: G09F9/305
Filed: 1971-07-07
Abstract: 1392437 Matrix displays MARCONI CO Ltd 30 March 1972 [7 July 1971] 31863/71 Heading G5C An indicator arrangement includes a plurality of elongated light guides 1 at least a portion of the outer longitudinal surfaces of each guide being provided with a surface layer of phosphor, and means 2 for introducing exciting radiation into selectable ones of the light guides. The light guides may be fibres of glass or plastics material, may be in crossed array and woven to form a mesh, and ground at the cross over points 3, phosphor 4 being only at these regions. Phosphors may be lanthanum or barium fluoride doped with rare earths, and excitation sources of infra red GaAs emitters, at one or both ends of the guides. Fibres may be 1 mm. diameter, spaced four/cm. A map position indicator (Fig. 3, not shown), includes lead (7) activating emitters 2 to produce two crossing dotted lines.
Patent GB-974763-A (GB)
Title: Improvements in or relating to locks
Inventor: WHITEHURST LAURENCE
IPC: H02B1/14
Filed: 1960-09-16
Abstract: 974,763. Latches. LOWE & FLETCHER Ltd. Aug. 17, 1961 [Sept. 16, 1960], No. 31889/60. Heading E2A. A fastening arrangement, particularly for use in locking the door of a cabinet containing high voltage electrical equipment, comprises a projection 12 mounted on the door and adapted to co-operate with the part 11 of a member 10 mounted on the frame of the cabinet, this latter member 10 also comprising a locking device 15, of the type described in Specifications 940,428 and 940,429, for locking the components of the part 11 in such a manner that the projection 12 may not be withdrawn therefrom. The locking device 15 is operated by a handle 27 which is detachable therefrom, but only when the door of the cabinet is closed and the device 15 has been actuated to lock the member 11, the handle then being inserted in an isolating switch to complete the electrical circuit containing the apparatus housed within the cabinet. The handle may not be withdrawn from the switch until the latter is in its open position, so that the door of the cabinet may not be opened until the electrical supply to the apparatus therein has been disconnected. The part 11 of the member 10 comprises a cylindrical housing containing four discs 17 rotatable about a common spindle 25, each comprising slots 18 and 19 and each spring-biased in such a manner that the four slots 18, and the four slots 19, are normally out of register. As the door of the cabinet is closed, the projection 12 enters an aperture 20 at one end of the housing, and its surface co-operates with each of the slots 19 in turn to bring the latter into register, the arrangement being such that the slots 18 are simultaneously brought into register. The locking device 15 is then actuated by the handle 27 to engage a bolt 25 in the slots 18, thereby holding the discs 17 in their projection-engaging positions.
Patent GB-1145627-A (GB)
Title: Methods and apparatus for forming electric heating elements
IPC: H05B3/50
Filed: 1966-07-15
Abstract: 1,145,627. Making electrical heating elements, twisting, bending cutters. ELECTRO-THERM Inc. 15 July, 1966 [28 March, 1966], No. 31991/66. Headings B3A, B3E and B3W. [Also in Division H5] In a method of making a finned electrical heating element a circular cross-section extruded tube having longitudinal fins has a resistance wire 14 inserted therein, the tube then being filled with granular insulating material 15 such as magnesium or aluminium oxide and sealed at each end. The tube is then deformed to a non-circular cross-section and the longitudinal fins are divided into segments 26 and twisted into parallel planes inclined to the tube axis. The tube is deformed between a pair of rolls 36, 37 to a hexagonal cross-section, the corners of the hexagon lying on the circumference of the initial circular cross-section of the tube, so as to reduce the cross-sectional area by at least 10%. The fins are cut and formed by the intermeshing teeth 48 of gear like cutters 46, 47. The gear teeth 48 may extend either the full width of the longitudinal fins or to a lesser extent so that fin segments (26) are joined by a free edge portion (26a), Fig. 11 (not shown). The hexagonal cross-section element may be used in a baseboard radiator and 180 degrees bends of moderate radius may be formed to give several parallel straight runs of heating element. In forming small radius bends the tube is deformed to a triangular, a semi-circular or a semi-hexagonal cross-section, Figs. 4a-4c respectively (not shown), and the fins may be removed from the bend location. The element may also be wound into a spiral or circular pattern and positioned in the inlet or outlet duct of a fan or air circulating device.
Patent GB-1287540-A (GB)
Title: Offset printing machine
IPC: B41F7/02
Filed: 1971-07-07
Abstract: 1287540 Offset printing machines AB PRINTING EQUIPMENT 7 July 1971 [10 July 1970] 32001/71 Heading B6C A web-fed six-cylinder rotary offset litho perfecting multicolour press comprises cylinder pairs 1, 2, and 11, 12 and 21, 22 which are movable into positions where either one side of the web is printed in two colours or impressions whilst the other side is printed in a single colour or impression or one side only is printed in all three colours or impressions. Each blanket or offset cylinder 2, 12, 22 is used when necessary as the impression cylinder for the other blanket or offset cylinders and if required further cylinder pairs may be added to the machine to print further colours.
Patent GB-471046-A (GB)
Title: Production of steel articles that do not undergo any quenching treatment
IPC: C22C38/20
Filed: 1935-11-19
Abstract: Articles which are not subjected to quenching treatment and in the use of which resistance to wear combined with tenacity is important, such as rails, wheel rims, and toothed wheels, are made from steel comprising 0,15-0,5 per cent of carbon, 0,7-1,6 per cent of silicon, 0,6-1,4 per cent of manganese, 0,5-2,5 per cent of chromium, 0,3-1,0 per cent of copper, the remainder being iron with small quantities of phosphorus and sulphur : the steel may also contain up to 1 per cent in all of nickel, aluminium, vanadium, and titanium.  Reference has been directed by the Comptroller to Specifications 370,821, 387,865, and 405,643.
Patent GB-507044-A (GB)
Title: Improvements in and relating to rear-wheel springing for motor cycles
IPC: B62K25/10
Filed: 1938-11-04
Abstract: 507,044. Spring frames for motorcycles. BAYERISCHE MOTOREN WERKE AKT.-GES. Nov. 4, 1938, No. 32059. Convention date, Nov. 5, 1937. Addition to 488,353. [Class 136 (iii)] In a rear-wheel spring suspension as described in the parent Specification, the bush or like member which con. nects the helical spring to the stationary guide tube is adjustable axially along ,such guide tube, to enable the spring to be adjusted according to the prevailing load or road conditions &c. In one construction, a bush 2 is rigidly secured to the upper protecting sleeve 1 and is in screw-threaded engagement with the stationary guide tube 3. The spring 6 is secured by its upper coils to a ring 5 rotatably mounted on the bush 2 between a collar 4 and the upper end of the sleeve 1. The sleeve 1 and bush 2 are rotated by means of one or more projecting handles 7 to adjust the spring. In a modification, the bush 2 slides on the guide tube 3 and is in screw-threaded engagement with the upper frame member 8, its upper end being closed and provided with a handle for rotation. In another form, a slidable bush is adjusted by an eccentric, and is held in its adjusted position by a clamping-ring or a pin.
Patent GB-520714-A (GB)
Title: Improvements in or relating to fire extinguishing fluid distributing systems
IPC: A62C3/08
Filed: 1938-11-07
Abstract: 520,714. Fire-extinguishing. GRAVINER MANUFACTURING CO., Ltd., SALMOND, H. M., and MATHISEN, A. Nov. 7, 1938, No. 32207. [Class 47 (ii)]  In a fire-extinguishing system for aircraft engines, a source 9 of extinguishing fluid under pressure is connected by unperforated piping 10, 12, 13 to spray nozzles 14, 15 arranged in the air intakes 4, 5 of the fuel system of the engine, and perforated spray pipes 16, 17 are connected in series with the nozzles and carried around parts of the engine 2, 3 and nacelle 8 which are most liable to fire. The perforations in the pipes 16, 17 are staggered along the pipes, and have a total area approximately equal to that of the pipes.