baber/WOPTO huggingface dataset:
Patent GB-379798-A (GB)
Title: The manufacture of new condensation products of the anthraquinone series
IPC: C09B3/64
Filed: 1931-06-26
Abstract: Anthraquinone derivatives are prepared by treating an alkali-soluble dimolecular conversion product of methyleneanthrone or a substitution product thereof described in Specification 373,129, and corresponding probably with one of the formul :  <FORM:0379798/IV/1> <FORM:0379798/IV/2> wherein each anthraquinone residue may contain a monovalent substituent such as halogen alkyl or aryl, with an oxidizing agent such as hypochlorite, permanganate, ferricyanide or sulphuryl chloride.  When an alkaline oxidizing agent is employed methyleneanthrone or its substitution products may themselves be used as starting materials.  The products obtained are nearly colourless, alkali-insoluble substances which may be converted into intensely coloured substances by treatment with alkaline condensing agents. These latter products may be reduced in the vat and reoxidized, and yield fast lakes with the customary substrata.  An organic diluent may be employed in either or both reaction stages.  In examples, (1) the yellow alkali-soluble condensation product of example 1 of Specification 373,129 is treated in an alkali-methanol solution with hypochlorite; (2) the starting material of (1) is treated in alkali-methanol solution with potassium permanganate, or potassium ferricyanide to give the same product which is also obtained by applying the treatment of (1) to methylene-anthrone itself: (3) the starting material of (1) is treated with sulphuryl chloride to give a condensation product containing chlorine: (4) the yellow alkali-soluble condensation product of example 3 of Specification 373,129 is treated in alkali-methanol solution with sodium hypochlorite; similar products are obtained by starting from the dimolecular condensation products prepared from 9-methylene-3 - chloro - or 2 - methyl - or 2 - phenyl - anthrone: (5) the starting material of (4) is treated with sulphuryl chloride: (6) the product of (1) is heated with alcoholic potash and the precipitate oxidized with hypochlorite; the product is highly coloured and gives a fast violet-red lake when mixed with a suitable substratum: (7) the product of (3) is treated with alcoholic potash to give a product corresponding to that of (6); by treating the product of (5) a violet dyestuff is obtained.
Patent GB-972517-A (GB)
Title: Heel pitch machine
IPC: A43D1/06
Filed: 1962-05-15
Abstract: 972,517. Foot-measuring apparatus. F. CHARLESWORTH. April 25, 1963 [May 15, 1962], No. 18561/62. Heading G1X. Apparatus for ascertaining the correct position of a heel relative to the forepart of a foot for preparing a moulded inlay or negative cast of a foot from which a positive cast or last may be made, comprises a heel platform 12, which may be raised and lowered, and a forefoot platform 24, with a curved resilient member 33 extending between them so as in use to conform to the curvature of the instep of the foot. As shown, the platform 12 is slidably supported by a pillar 13 and is raised or lowered by a lever 20 actuating a shaft 17 and arm 16, the platform 12 being locked in position by a spring pressed pin 21 engaging a rack 15 on pillar 13. The forefoot platform 24 is horizontally slidable by worm 29 engaging a threaded sleeve 32, the rear edge 35 of the platform contacting the member 33 which is in the form of a flexible spring steel strip extending across the top of platform 12. In a modification the heel platform is raised and lowered by a rack or pinion.
Patent GB-645406-A (GB)
Title: Improvements in or relating to machines adapted for progressively seaming together two layers of sheet material by use of the heating effect of a high frequency electricfield
IPC: B29C65/04
Filed: 1947-07-12
Abstract: 645,406. Control systems for high-frequency apparatus. BRITISH UNITED SHOE MACHINERY CO., Ltd. July 12, 1947, No. 18602. Convention date, July 16, 1946. [Class 38 (iv)] [Also in Groups VIII, XI and XL (c)] In a control system for supplying highfrequency electrical energy to a variable-speed machine for seaming non-metallic sheet material (see Group VIII), an oscillator M is arranged to supply a pulse of determined duration at each rotation of a switch 76 which is geared to the feed mechanism of the machine and includes a conducting segment 83 adapted to shortcircuit contacts 77, 78, 79 for a part of each revolution. High voltage power is supplied to oscillator M through a modulating valve 64 which is biassed beyond cut-off due to current flowing in a resistor 105, except immediately after the contacts are open-circuited when the current through resistor 105 is interrupted while a condenser 100, in a pulsetiming circuit including a voltage regulator 68 and a variable resistor 101, is charged up. During this charging period a pulse of high frequency energy is delivered ; resistor 101 can be regulated to control the pulse duration. Specification 613,419 is referred to.
Patent GB-106467-A (GB)
Title: Improvements in Friction Couplings.
Inventor: SIEURIN PAUL WILHELM
IPC: F16D13/08
Filed: 1916-12-29
Abstract: 106,467. Sieurin, P. W. May 18, 1916, [Convention date]. Clutches, friction. -A band clutch which is put intc operation b y a n auxiliary clutch comprises a band 4, Fig. 1, wound round a drum 3 on the driving-shaft 1 and connected at one end by a pin 5 to a wheel 6 on the driven part 2. The other end of the band is tensioned by a cable 23 passing round guide pulleys 24, 25 and connected to the boss 17 of a loose clutch member 11 coacting with a clutch 13 on the driving-shaft 1. When the clutch 11, 13 is connected, the band 4 is wound up and the drum 3 drives the parts 6, 2. The Specification as open to inspection under Sec. 91 (3) (a) describes also the following modifications : (a) The cable 23 is omitted and the end of the band 4 is connected to a link and to an arm operated by the rotation of an eccentric boss 17, or a concentric boss is connected by links to the end of the band so as to tighten it when the boss is rotated; (b) The band Fig. 3 (cancelled) consists of a double cable associated with friction rings 26. One end is fastened to a chain connected to the clutch 13 and the other end is fastened by a pin 5 to the wheel 6. A protective casing 27 is provided.
Patent GB-1519411-A (GB)
Title: Liquid filter
IPC: B01D27/08
Filed: 1976-05-07
Abstract: 1519411 Oil filter with anti-drain-back valve GENERAL MOTORS CORP 7 May 1976 [27 May 1975] 18768/76 Heading BID A liquid filter assembly, e.g. an engine oil filter, comprises a casing 10 closed by an end closure plate 18 having a central outlet opening 20 around which is a plurality of inlet openings 22; an annular filter element 30, e.g. of pleated paper, secured in the casing and having one end closed by a cover plate 34 sealed thereto and the other end having sealed thereto a cover plate 32 with a central opening 33; and an anti-drain back valve 36 comprising an annular elastomeric body 38 which fits within the cover plate opening 33 and around the closure plate opening, an integral co-axial outwardly extending annular valve flange 50 arranged to overlie and close inlet openings 22 but move away therefrom under inlet fluid pressure, and an integral co-axial annular loading and sealing collar 54 normally extending longitudinally from the body prior to assembly but designed in assembly to flex outwardly and transmit an axial force resulting from compression of the body onto the end of the filter element around the cover plate opening.
Patent GB-146891-A (GB)
Title: Improvements in paper pulp-reclaimers
IPC: D21F1/66
Filed: 1920-07-06
Abstract: 146,891. Bird, C. S. Jan. 21, 1915, [Convention date]. Pulp, catching and recovering.-A rotary screen 18 in a vat 5 collects pulp which is removed therefrom by jets of water from a pipe 15 and by a wiper roll 23 having strips 24 of felt. A hood 25 collects the pulp and directs it to a receptacle 9.
Patent GB-1511512-A (GB)
Title: Apparatus for impregnating workpieces
IPC: B27K3/08
Filed: 1975-05-05
Abstract: 1511512 Impregnating wood K E ARUIDSSON 5 May 1975 [6 May 1974] 18819/75 Heading D1P An apparatus for impregnating one or more workpieces 1, e.g. of timber or concrete, in an enclosed space comprises (a) a workpiece supporting surface 3; (b) a rigid frame work 5 in proximity to and coextensive with the boundary of surface 3; (c) a flexible material 6, 7, 8 secured to framework 5 and defining an enclosed space or chamber 2 over surface 3; (d) a flexible sealing means 9 between the boundary of surface 3 and the surface of framework 5 facing said boundary; (e) a container 23 disposed beneath surface 3 and extending beyond said boundary; and (f) a skirt member 10 extending from framework 5 or flexible material 6, 7, 8 beyond sealing means 9 into container 23. Preferably the flexible material comprises a foam plastics layer sandwiched by cloths 6, 8. The introduction of liquid into space 17 deforms the flexible material into contact with the workpieces 1 and presses seal 9 against surface 3. The apparatus is used to apply reduced pressure to the workpieces 1, impregnate its pores with a first component comprising a liquid or a gas such as polypropylene, removing said first component completely or partially from the pores, applying a second component comprising a liquid e.g. paraffin or tar and subjecting the workpiece to at least atmospheric pressure to impregnate it with the second component. The first component has a lower surface tension than the second component. If still present when the second component is applied it facilitates wetting the surfaces of the pores and reduces the amount of second component needed. Preferential impregnation of discrete areas A soft porous sheet 53 and a recessed backing sheet 56 are placed on a workpiece 54. On reducing the pressure and then applying an impregnant liquid the liquid is first taken up by recesses 57 and is then slowly absorbed by the pores of the workpiece adjacent each recess.
Patent GB-1468921-A (GB)
Title: Circuits including field-effect transistors
IPC: G05F3/24
Filed: 1974-04-30
Abstract: 1468921 Transistor circuits WESTERN ELECTRIC CO Inc 30 April 1974 [3 May 1973] 18856/74 Heading H3T A potential divider comprises series and shunt field effect transistors, e.g. T2, T1, Fig. 1, and at least one further transistor, e.g. T5 or T3 with its source-drain path shunting the gate-drain path of at least one of the other two transistors, the circuit being such that the output voltage, V 0 , differs from the input voltage V 1  by a voltage which is dependent on the threshold voltages of the series transistor T2 and the further transistor. A number of such further transistors may be included, T3, T4, T5, Fig. 1, and the output V 0  is dependent on the number of such further FET's. In a first modification, Fig. 2 (not shown) the further FET's are only connected in the series arm, the gate of the shunt arm FET being coupled to its drain. In a second modification Fig. 4 (not shown) the further FET's are only coupled in the shunt arm and an additional output FET (T35) is provided. In another embodiment Fig. 3 the series arm FET T6 has its gate supplied by a single further FET T7. The shunt arm FET T8 is connnected in series with an FET T9, these two receiving antiphase clock signals at their gates so that capacitor C2 is charged and discharged. Capacitor C1 serves to store charge and feed it, as needed, to the output and C2, T9 serve as a current source for replenishing C1. C2, T9 may be omitted, the gate of T8 being connected to a suitable source to replenish the charge on C1.
Patent GB-777786-A (GB)
Title: Improvements in or relating to indicators
Inventor: TROBRIDGE GEOFFREY WILLIAM
IPC: E01F9/012
Filed: 1955-06-30
Abstract: 777,786. Fencing. DUNLOP RUBBER CO., Ltd. May 3, 1956 [June 30, 1955], No. 18876/55. Class 45. [Also in Group XVIII] A portable fence or obstruction indicator comprises a conical member 1 which is provided with a rib 2 and an apertured plate 3 for receiving a warning flag or an eye bolt for carrying a rope barrier, sign or lamp. The member 1 is made of natural or synthetic rubber or a rubber-resin composition and has coloured bands painted thereon. In a modification, Fig. 3 (not shown) the uppermost rim of the conical member is bent over inwardly and downwardly. Specification 665,785 is referred to.
Patent GB-747944-A (GB)
Title: Improvements in and connected with taps or cocks fitted with locks
Inventor: ELSDEN HERBERT CHARLES
IPC: F16K5/04
Filed: 1954-06-28
Abstract: 747,944. Mechanical switches without quick-action. ROSS, COURTNEY & CO., Ltd. June 28, 1954, No. 18889/54. Addition to 708,510. Class 38(5) [Also in Group XXIX] In a combined fuel tap and electric switch according to the parent Specification, leakage of fuel to the lock 3 and the switch 4 is prevented by packing rings 8 housed in annular recesses in the plug, one on each side of the fuel passage 2x.
Patent GB-530660-A (GB)
Title: Improvements in and relating to multi-way electric switches
IPC: H01C10/36
Filed: 1939-06-28
Abstract: 530,660. Multi-way rotary switches. VENTAXIA, Ltd.. and COLLINS, A. L. June 28, 1939, No. 18892. [Class 38 (v)]. In a multi-way switch for controlling a motor &c. rotation of a handle 19 brings a depression 21 in the insulating block 18 opposite selected contacts 27, 28, 29 which are thereby allowed to move into engagement with corresponding fixed contact points on a conducting strip 30. The contacts 27, 28, 29 are connected to points on a resistance. The precise position of the handle 19 and block 18 is determined by a spring 26 engaging depressions 22 ... 25.
Patent GB-278124-A (GB)
Title: Improvements in dashpot control mechanism
IPC: G01G23/08
Filed: 1926-07-29
Abstract: 278,124. Denison, H. M. H., and Denison & Son, Ltd., S. July 29, 1926. Dashpots. - The resistance to movement of a piston in its cylinder is regulated by restricting the flow of fluid by a valve M formed of one or two cones fitting closely but freely in a port in a partition L. The valve is guided by a stem which works through holes in discs covered by the casing K and springs N resist displacement of the valve from the closing position in which it is shown. The two sides of the valve are connected to the two sides of the dashpot piston by pipes O, O<1>. In a modification, the valve is formed from a single cone and one-way valves are provided in the piston.
Patent GB-1110331-A (GB)
Title: Process for the production of hydrophobic silica
IPC: C01B13/14
Filed: 1965-05-05
Abstract: Pyrogenically obtained silica which contains reactive OH-groups distributed over its surface is rendered hydrophobic by suspending in water and treating directly with liquid or vaporized alkyl halogen silanes and subjecting to a thermal after-treatment at temperatures of from 200 DEG  to 500 DEG  C., after it has been filtered, washed, dried and ground.  The silane may be di-methyl dichlorosilane. A water-immiscible organic liquid, e.g. toluene in from 0.01 to 1% based on the weight of the suspension may be added before filtering. The drying may be at from 105-140 DEG  C.
Patent GB-1270128-A (GB)
Title: Acoustical sensing system
IPC: G01S15/04
Filed: 1969-04-14
Abstract: 1,270,128. Acoustic position-sensor. PITNEY BOWES Inc. 14 April, 1969 [22 April, 1968], No. 19046/69. Heading H4D. [Also in Division, G1, G4 and G5] For sensing if a surface is at a predetermined position, a pattern of acoustical interference fringes indicative of the prevailing position of the surface is established and an acousticallysensitive receiver comprising a fluidic amplifier is positioned so as to be coincident with one of the fringes existent when the surface is at the predetermined position. In the Fig. 12 embodiment for checking the thickness or continuity of a coating 157 on sheet base material 154 being moved over guide 150, a fluidic device 30 acting as a whistle (see Division G5) is in communication with conical cavity 174 in block 166 and generates ultrasonic waves which are reflected from coating 157. The incident and reflected waves interfere to give a fringe pattern 15a, 15b, 15c, 15d. If the coating surface is at a predetermined position 158, fringe 15d (a pressure null) intersects a receiver comprising a two-stage fluidic device 31 (see Division G4) communicating with conical cavity 183 and acting as a switch. This switch then gives a low pressure output, but if the coating thickness changes the fringe is displaced (e.g. to 15d<SP>1</SP> or 15d<SP>11</SP>) and the switch gives a high pressure output.
Patent GB-707595-A (GB)
Title: Device for purifying or refining the lubricating oil in internal combustion engines
IPC: C10M175/00
Filed: 1951-08-13
Abstract: A device for removing water and fuel from lubricating oil used in an internal combustion engine comprises a first chamber into which lubricating oil is introduced from the lubricating system of the engine a second chamber within the first chamber and communicating with it, means for leading the oil, from which water and fuel is evaporated in the second chamber, back to the lubricating system, and a pipe which traverses the two chambers through which exhaust gases flow to heat the oil.  The device may be mounted in the engine so that the pipe is vertical and the device is above the crankcase or sump.  Referring to the drawing, filtered lubricating oil is fed by needle valve 12 into chamber 1 and heated by contact with pipe 3 through which hot exhaust gases pass.  The heating is controlled by the size of the hole in the removable bushing 25 and also by the amount of oil fed to the device, regulated by adjusting screw 13. The oil flows through pasages 16 into chamber 2 and down the steps <PICT:0707595/III/1> 17.  Water and fuel evaporate from the oil; the evaporation is assisted by maintaining the chamber under suction by connecting it to the air intake of the carburetter by tubing 18.  The oil then flows by gravity through tubing 20 through the bulb house 21 thus heating the temperature gauge 22, and then by opening 23 to the crankcase or sump.  The screen 24 acts as a trap to prevent the suction maintained in chamber 2 operating in the lubricating system.
Patent GB-1003913-A (GB)
Title: Mechanical seal assembly
IPC: F16J15/38
Filed: 1962-05-17
Abstract: 1,003,913. Mechanical seals. BORGWARNER CORPORATION. May 17, 1962 [May 23, 1961 (2)], No. 19067/62. Heading F2B. [Also in Division B3] In a mechanical seal for a rotary shaft S and comprising sealing rings 5a and 20a carried by carrier rings 5 and 20 respectively and urged into mutual facial sealing contact by springs 10, each sealing ring is formed in halves having abutting end faces 5e, 20e held in sealing engagement with each other by a loading collar 5f, 20f secured to the respective carrier ring by screws 5g, 20g and having a tapered face 5j, 20j engaging a correspondingly tapered peripheral face 5k, 20k on the sealing ring. The end faces may have complementary irregular indentations 5m and projections 5n, Fig. 4, formed by fracturing a complete ring, for example by breaking it across a sharp straight edge is shown in Fig. 3. The ring is preferably scored at 50 before fracturing. The ring 5 is sealed by packing rings 9 to a sleeve 1 which is secured to the shaft and carries a driving key 14 engaging a recess 17 in the ring. The ring 20 is prevented from rotating by dowels 30 engaging recesses 28, 29 in the ring and in a flange 21 secured to the shaft housing H. The sealing rings 5a and 20a may be of cobalt chromium alloy and carbon respectively.
Patent GB-205188-A (GB)
Title: Improvements in or relating to marking machines
IPC: B41F19/06
Filed: 1922-07-12
Abstract: 205,188. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). July 12, 1922. Ink-ribbon mechanism. - An embossing or marking machine comprises a base 10, Fig. 1 having a forwardly extending arm 12, opposite impression members, such as a die 32 and a worktable 52, carried by the arm and base, a supply device for marking medium in strip form mounted at the forward extremity of the arm and feeding mechanism for the strip mounted on the base behind the impression members and between the arm and base. A supply roll 88 of colour ribbon is rotatable on a shaft 86 in a casing 74 removably secured to the member 14 bv means of slotted arms 80 engaging guiding pins 82 and fixing screws 84. A brake 96, Fig. 2, engaging the end of the roll is carried by a spindle 98 longitudinally adjustable to vary the. resistance; also, a disc 90 adjustably fixed on the shaft 86 by a spring catch 92 engaging grooves 94 allows for different widths of rolls. A cranked rod 106 spring-pressed outwardly takes up the slack in the ribbon caused by the downward movement of the. supply device, and a bar 112 spring-pressed downwardly lays the ribbon on the table 52 in advance of the die 32 and prevents it from rising with the latter. The ribbon is fed forward by rollers 126, 128, Fig. 3 and is wound on a callapsable take-up roller 130, these rollers being intermittently rotated by gearing from a lever 136. The feed roller 126 is adapted to be raised by eccentrics 204 on a shaft 206 engaging in slotted extensions of its bearings whereby, if the ribbon is to be cut, it may first of all be drawn back to provide a length of used material on the remaining roll for attachment to the take-up roller and for feed purposes. Spring fingers 166 engaging grooves in the roller 126 prevent the ribbon from adhering to the roller. The roller 130 consists of two sections pivotally connected and pressed together by springs. It is received on a sleeve 172 mounted on a shaft 170 and driven therefrom through a friction washer 182 so as to allow for the increasing diameter of the roll. The end of the ribbon is laid over a slot in either of the sections of the roller 180; a bar having flattened ends to pass through contracted openings entering the slot is then forced into the slot and is turned to secure it. The arm 136 is oscillated from a cam 156, Fig. 1, on the shaft 24 through levers 152, 150, 148 and 164, a screw adjusted block 162 in the arm 148 and a number of connecting points 165 in the lever 136 allowing for variations in the amount by which the ribbon is fed forward.
Patent GB-802385-A (GB)
Title: Improvements in and relating to squirrel cage rotor a.c. induction motors
IPC: H02K17/16
Filed: 1956-06-20
Abstract: 802,385. Squirrel cage constructions. GENERAL ELECTRIC CO. June 20, 1956 [June 20, 1955], No. 19106/56. Class 35. Each slot 2 of each lamination of the laminated squirrel cage rotor core of an A.C. induction motor comprises a first main portion 3 which when aligned with respective portions 3 of all the other laminations accommodates a cast substantially straight bar 7 of the winding, and a second portion extending from the first portion substantially radially inwards of the core, the medium plane of each of the second slot portions 4, 4a of one and of the other of two groups of stacked laminations 1, 1a being parallel to but displaced laterally to one side and to the other side respectively of the medium plane of the respective slot first portion 3 so that in one of the two groups a winding bar extension 9 cast in its slot second portion 4 is interrupted by the laminations 1a of the other group whose second portion 4a is displaced in the opposite direction. As shown, one group comprises a stack of several laminations 1 separated from the next stack of that group by a single lamination 1a of the other group, and the latter lamination is a punching of shape identical to that of the first group laminations but is reversed with respect to the latter. End rings 8, and fan blades 10 at one or both ends of the rotor, are integrally cast with the rotor winding 7 which preferably is of aluminium. The slots may be skewed and aligned by a keyway 6 in the rotor bore 5.