baber/WOPTO huggingface dataset:
Patent GB-958774-A (GB)
Title: Improvements in and relating to the temperature compensation of transistor amplifiers
Inventor: ANTOSZEWSKI EUGENIUSZ
IPC: H03F1/30
Filed: 1959-06-11
Abstract: 958,774. Transistor switching circuits. ENGLISH ELECTRIC CO. Ltd. June 9, 1960 [June 11, 1959], No. 20035/59. Heading H3T. [Also in Division H2] In a transistor switching circuit comprising opposite conductivity type transistors T1, T2 the collector circuit of transistor T1 includes a thermistor TR across which the input signal to the base-emitter circuit of transistor T2 is developed and which has such characteristics in relation to the other components of the circuit as to effect temperature compensation of the current flowing in the output circuit of transistor T2. The switching on of transistor T1 by an input signal applied across the input terminals is delayed until capacitor C1 is charged to a voltage more positive than the emitter of transistor T1 which latter voltage is determined by the setting of potentiometer P. When transistor T1 is rendered conducting the potential drop developed across thermistor TR causes transistor T2 to conduct and relay coil A to be energized, transistor T2 being protected against high transient voltages by capacitor C2. Temperature variations in transistor T2 are compensated for by thermistor TR since an increase in temperature results in a decrease in the emitter-base signal applied to the transistor T2 and hence a decrease in its collector current. A voltage stabilizing circuit comprising Zener diode D2 and resistor R2 renders consistent the time delay in energizing the relay coil A.
Patent GB-232908-A (GB)
Title: Device for controlling valves and the like by means of a pressure medium
IPC: F02M61/10
Filed: 1924-08-25
Abstract: 232,908. Hesselman, K. J. E. April 24, 1924, [Convention date]. Fluid-actuating mechanism.-A fluid-actuating device for valves and the like and particularly adapted for actuating a liquid-fuel valve on an internal-combustion engine, comprises a number of independent annular discs placed on one another on a ported carrier adapted to close one end of the column, to prevent lateral movement of the discs and also to carry means arranged to hold the discs assembled in a longitudinal direction. The Figure shows the invention applied to the actuation of a fuel valve. The annular discs 5 have oppositely-directed flanges 6, 7 at their inner and outer edges and are assembled to engage loosely with one another alternately at their inner and outer edges. The lower end of the column is closed by a plate 19 carrying the valve 15 held in a. box-like carrier 17 by an annular nut 20. The carrier has a ported stem 22 to admit atmospheric pressure to the inside of the bellows and is adjustably supported by a screw 25 mounted in a bridge 26. Liquid under pressure is admitted through a conduit 23 and when the pressure is sufficiently high the bellows are compressed and the valve opened. In a modification, the discs are held and guided by a bolt formed on the end-plates passing through the discs. The flanged discs may be arranged alternately with plain discs or the discs may each have a single flange formed alternately at their inner and outer edges. The flanges may overlap adjacent discs to prevent lateral movement. The bellows may consist of plain discs separated by flanged or plain spacing- rings.
Patent GB-1055642-A (GB)
Title: Improvements in or relating to hydraulic fluids
Inventor: HITCHCOCK NORMAN ERNEST FREDER
Filed: 1963-01-17
Abstract: Hydraulic fluids, which are substantially free from esters of ricinoleic acid such as a glycol ricinoleate, comprise a major proportion of one or more polyoxyalkylene glycols or ethers thereof as the base fluid, and a minor proportion of an orthophosphate or sulphate salt of a C4-24 primary or secondary aliphatic amine. Suitable salts are di-n-butylamine orthophosphate, diamylamine sulphate, oleylamine orthophosphate, and g -(b 1-hydroxy-b -ethoxy ethoxy) propylamine orthophosphate.  The pH of the fluid may be adjusted to above pH 8 by diamylamine, morpholine, triethanolamine, or a mixture thereof.  Other possible additives include benzotriazole, tartaric acid, and ethylene glycol.
Patent GB-319093-A (GB)
Title: Improvements in or relating to stretchers for boots, shoes and other footwear
IPC: A43D3/08
Filed: 1928-07-12
Abstract: 319,093. Paton, H. H. July, 12, 1928. Stretchers.-A device for locally stretching footwear comprises two levers A, A<1> pivoted at a and shaped as shown so that their forward and rear ends are in the same plane. The forward end of the lever A carries a fixed or removable boss B, and the flattened or straight forward end of the lever A<1> is formed with a hole, opening, or recess C to co-operate with the boss B. The boss and hole-carrying ends of the levers are parallel. The end of the lever A<1> may be replaceable to furnish holes of different sizes. The pivot a may be so arranged that the levers can readily be separated. The edges of the hole C may be lined with fabric or other material. As shown, a pivoted bolt D and wing nut D<1> are provided for holding the device in operative position. Reference has been directed by the Comptroller to Specifications 17574/97, 2405/01, and 5443/01.
Patent GB-713910-A (GB)
Title: Improvements in or relating to the isomerisation of paraffin wax
IPC: C10G45/62
Filed: 1952-08-12
Abstract: A process for the isomerization of paraffin wax comprises vaporizing a paraffin wax and contacting the vapours, mixed with at least one mol. of hydrogen per mol. of wax and in the absence of any liquid phase, with a supported platinum catalyst at a temperature between 300 DEG C. and 550 DEG C.  The carrier for the catalyst is preferably activated alumina, free from alkaline substances, and the catalyst may contain 0.05 per cent. to 1.0 per cent. platinum.  The vaporized wax is preferably mixed with hydrogen in mol. ratio of at least 1:5, and the conditions should be such as to prevent condensation to a liquid phase.  The contact time may be between 0.5 and 25 seconds and should be insufficient to produce more than 25 per cent. conversion to cracked products.  The temperature is preferably between 375 DEG C. and 490 DEG C. and the pressure may be between 3.5 and 210 atmospheres, preferably between 21 and 70 atmospheres.  The product consists of normally liquid oil, uncoverted wax, partially converted wax and cracked products.  The last are removed by distillation, and the wax may be removed from the oil and recycled, to give a high quality lubricating oil.
Patent GB-1328922-A (GB)
Title: Method of preparing dry free-running granular material consisting  substantially of sodium carbonate and sodium hydroxide
IPC: B01J2/16
Filed: 1971-04-19
Abstract: 1328922 Preparation of glass batches; treating Na 2 CO 3  CHEMISCHE FABRIK KALK GmbH 19 April 1971 [27 Jan 1970] 20344/71 Headings C1A and C1M Dry, free-running granular material substantially consisting of sodium carbonate and sodium hydroxide is prepared by spraying an aqueous sodium hydroxide, with an NaOH content of 30-80% by weight on to a moving bed of anhydrous sodium carbonate. The sodium carbonate is at a temperature of 100-300‹ C., preferably 200-270‹ C. 40-60 Parts by weight of the granular material thus prepared are blended with 60-40 parts by weight of quartz, sand, calcium carbonate or a mixture of these constituents to form a glass batch.
Patent GB-1141082-A (GB)
Title: Power operator
IPC: E21B34/04
Filed: 1966-05-09
Abstract: 1,141,082. Valves. ACF INDUSTRIES Inc. 9 May, 1966 [15 June, 1965], No. 20434/66. Heading F2V. [Also in Division H1] The control stem 84 of a mechanical device, such as a gate valve, may be moved longitudinally by rotary drive means 68, 69 or by a source of stored energy, such as the spring 104, which is released in response to predetermined conditions to move the device to a preselected safe position. The stem is in screw-threaded engagement with a rotatable tubular shaft 82, having a flange 86 mounted in thrust bearings 88, 90 and splines 78 for driving engagement with a sleeve 66 coupled to the worm drive 68, 69. A toothed gear drive (144, 148, Fig. 4, not shown) connects the worm to an electric motor having switches in its supply which are opened at the normal limits of travel or in response to excessive torque by axial movement of the worm against a spring load. The spring 104 is released when a solenoid 110 is de-energized automatically or manually to permit a spring 116 to withdraw a latching member 112 from a recess 114 in a spring retainer 92. If the valve is already closed when the spring is released, the gate will be in stopping abutment with the bonnet (26, Fig. 1, not shown) while if the gate is partially open, the spring will expand just sufficiently to move the gate to the closed position. Resetting of the spring is accomplished by rotating the shaft 82 so that it travels downwardly on the valve stem until the latching member 112 enters the recess 114. Switches 120, 122 are engaged by the spring retainer to provide an indication of its position. Hand wheels (142) may be connected to the rotary drive means.
Patent GB-1312587-A (GB)
Title: Preload spindle bearing for machine tool
IPC: B23Q1/70
Filed: 1971-04-19
Abstract: 1312587 Maintaining machine tool spindles GIDDINGS & LEWIS Inc 19 April 1971 [12 Feb 1970] 20507/71 Headings B3B B3C and B3K In a machine tool such as a horizontal boring, drilling or milling machine having a headstock 20 which incorporates a rotatable and axially displaceable spindle assembly 30 mounted in a pair of tapered roller bearing assemblies 31, 32, means is provided to preload the bearings in relation to the operating conditions of the machine tool. The spindle assembly is constituted by a sleeve 29 and a spindle 22 concentric therewith and which is rotatable and axially displaceable within the sleeve. The sleeve is supported in the bearings. the inner races 70, 81 being secured to the sleeve 29 for rotation therewith and the outer races 76, 84 being non- rotatably located in the headstock. One of the outer races 84 is positioned in an annular chamber in the headstock which forms two  annular cylinders 90a, 90b, one on either side of the race. Circular pistons 94a, 94b are located in each respective cylinder and fluid pressure is admittable selectively to the cylinders to effect displacement of the pistons to displace the outer race axially in either direction which effects preloading of the bearings supporting the spindle assembly. A fluid operated annular clamping member 49 is provided between the spindle 22 and the sleeve 29 to permit clamping of the spindle relative to the sleeve when the spindle is in a predetermined axial position relative to the sleeve. Means is provided for cooling and lubricating the bearings during operation.
Patent GB-406294-A (GB)
Title: An improved method of producing photographs in two or more colours
IPC: G03C7/04
Filed: 1932-07-20
Abstract: 406,294. Colour photography. GASPAR, B., 38, Innsbruckerstrasse, Schoneberg, Berlin. July 20, 1932, No. 20523. Convention date, July 23, 1931. [Class 98 (ii).] Photographic copies of multicolour screen images are produced on material consisting of several superimposed layers differently coloured and sensitized for different colours, using for the exposure of the original material a normal multicolour screen, and for the reproduction a screen having a congruent pattern, but having the elements coloured according to the sensitiveness and spectral transmission of the multicolour layers. Suitable multi-layer material for the copying process is described in Specification 408,991 (as open to inspection under Sect. 91). The taking screen for a three-colour process may be coloured red, green and blue, the copying screen being similarly coloured or its colouring modified, e.g. by shifting the transmissions toward the red end of the spectrum or by omitting one primary colour and dividing another into two bands. Other variants are given in the Specification for three-colour and two-colour screens. To obtain correct register, one edge of the exposure screen may be coloured, e.g. green, and the copying screen may then be adjusted till the colour replacing green in the copyng screen appears in the corresponding position. Specifications 369,616, 395,718, 397,159, 397,188 and 397,192 also are referred to.
Patent GB-507268-A (GB)
Title: Improvements in or relating to brake cylinders
IPC: B64C25/44
Filed: 1938-07-11
Abstract: 507,268. Hydraulic transmission of power. ROTADISK. APPARATEBAU GES. July 11, 1938, No. 20536. Convention date, July 10, 1937. [Class 69 (ii)] [Also in Group XXXIV] A brake master cylinder 1 for hydraulic brakes, more particularly for aircraft is pivotable as a lever about a pivot 23 and has a piston connected by a link- 25 to a fixed point 24 which effects movement of the piston during pivotal movement of the cylinder. The cylinder 1 is an auxiliary cylinder for operation of the brakes externally of the aircraft and is arranged in the pipe lines between the master cylinder in the interior of the aircraft and the brakes. A passage for normal operation of the brakes is formed through this cylinder and through valves 46, 461, Fig. 3, in the base 7 of the cylinder, which are held open in the inoperative position of the cylinder 1 by the engagement of the valve stems 42, 42<1> with adjustable stops 48. When the cylinder 1 is operated by means of a hand grip 2, the valves 46, 46<1> are allowed to close and valves 52, 52<1> are opened by a lever 29 to allow the cylinder 1 to force fluid to the brakes.
Patent GB-715823-A (GB)
Title: Improvements in or relating to sheet feeding mechanisms
IPC: B65H7/12
Filed: 1951-08-31
Abstract: 715,823. Feeding sheets. BACKHOUSE, H. T. Aug. 25, 1952 [Aug. 31, 1951], No. 20638/51. Class 100 (1) Faulty-feed control devices.-In sheet-feeding apparatus wherein sheets are conveyed over a feedboard 10 up to front stops 11 and between a two-sheet detector comprising upper and lower suction nozzles 43, 16, respectively, which are both sealed when two sheets are superimposed and so cause a warning to be operated or the appaartus to be stopped, each nozzle has directly connected therewith and adjacent thereto a suction control valve whereby the time lag between the opening of the valve and the build-up of suction at the mouth of the nozzle is reduced. A valve box 13, Fig. 1, supported beneath the feed-board 10 and connected to a source of suction by a pipe 15, has a nozzle 16 extending through the board, and includes a piston slide valve 17 (not shown) having one end 19 engaging a cam 20 on a constantlyrotating shaft 21, which is actuated to establish connection between the nozzle and the pipe. A relief valve 25, which can be adjusted by a handle 39, is mounted in the top of the box to enable the degree of suction at the nozzle to be varied. Mounted above the feed-board on a cross-bar 40 is a second valve box 42 provided with a nozzle 43 and a relief valve 49, suction being supplied to the box through a hollow shaft 44. This shaft is rocked by the shaft 21 through cam and lever means 46, 47, and so oscillates a control valve 55, 56 within the box 42 to establish suction to the nozzle 43. There is incorporated in the lower valve box 13 a cylinder 31 which forms a connection between the valve 17 and the nozzle 16. A piston 30, within the cylinder, having a rod 32, is adapted to be moved to the left when suction builds up due to the sealing of the two nozzles by two superimposed sheets on the feed-board 10, so that the rod 32 projects into the path of a check member which thereby stops the machine. In the form shown in Fig. 6, there is a piston 30 in each valve box, and each piston rod is arranged to operate an electric switch 58, 59 whereby a solenoid 60 is energized to stop the machine. In a further form, the electric switches are replaced by valves controlling a pneumatic system which stops the machine. Specification 688,629 is referred to.
Patent GB-459926-A (GB)
Title: A combined coupling, fixing clamp and pressure tight joint for rubber hose pipes and the like
IPC: F16L33/22
Filed: 1935-07-20
Abstract: 459,926. Pipe joints. BROOMHEAD, F. W., 2, Mansfield Crescent, Armthorpe, Doncaster, Yorkshire. July 20, 1935, No. 20687. [Class 99 (i)] In a hose-pipe coupling in which the hose is compressed on to the tapered spigot A by a sleeve screwing into a nut C engaging a shoulder A<1> on the spigot, the nut is secured, whilst free to rotate on the spigot, by a spring ring E in a groove E<1>. The nut is recessed at F.
Patent GB-441024-A (GB)
Title: Improvements in or relating to knitted fabrics
IPC: D04B1/06
Filed: 1934-07-14
Abstract: 441,024. Knitting. MELLOR, BROMLEY, & CO., Ltd., BROMLEY, T. C., and SHORTLAND, A., St. Saviour's Road, East Leicester. July 14, 1934, No. 20690. [Class 74 (ii)] An interlock fabric of the type described in Specification 20409/08, [Class 74], has an additional yarn or yarns incorporated with one or each of the basic webs 1, 1a on one face of the fabric as shown in Fig. 3, or on both faces of the fabric but in different courses or interlooped or interknitted with rib and plain wales respectively in the same courses of one or each basic web, as shown in Fig. 5. The additional yarn 7a or 8a may be knitted in or intermeshed with all the courses of either or both basic webs or only in predetermined wales or courses and tuck stitches may be formed in predetermined wales or courses of either or both webs, as shown in Fig. 7. The fabric may be produced on circular or straight bar double needle-bed machines wherein the needles are arranged in two sets in both of the needle beds, the additional yarn or yarns being supplied at predetermined intervals to some or all of the rib needles or the plain needles or to the rib and plain needles of one or each bank. Specification 14235 /09, [Class 74 (ii)], is referred to.
Patent GB-275651-A (GB)
Title: Improvements in stencil printing apparatus
IPC: B41F15/08
Filed: 1927-08-05
Abstract: 275,651. Westenhoff, J., and Westenhoff, O., (trading as Westenhoff & Co.). Aug. 5, 1926, [Convention date]. Stencilling-machines.-In stencilling-apparatus for printing upon a pile of sheets, and comprising a stencil frame pivoted on vertically movable guides and associated with rack-and-pinion mechanism so that when the stencil frame is swung upwards it is also automatically raised, the pinion shaft is mounted in the movable guides and carries a ratchet wheel engaged by a pawl pivoted on the stencil frame, whereby the frame is automatically retained in the raised position. A counterbalancing-arrangement for the frame is also described. The stencil frame E is pivoted on a rod E<1> detachably secured by nuts E<3> in open slots in extensions P<1> of guide sleeves P sliding on vertical columns O. The pinion shaft Q is mounted in the extensions P<1> and carries at each end a pinion R engaging through a slot in the sleeve P with a rack O<1> on the adjacent column O, and a central ratchet wheel S co-operating with a pawl J pivoted at J<1> on the stencil frame E so that the wheel S is rotated bv the pawl as the frame E is swung upwards. The guide extensions P<1> are provided with pins L<3> engaging in elongated slots D<2> in flanges on angular abutments D, which rest on the top of the pile of sheets A when the frame E is lowered, and are raised with the frame in the latter part of its upward swing. A counterpoise N is carried by arms N<1> pivoted to threearmed pieces T, which are pivoted to lugs E' on the stencil frame and carry a rod U bearing antifriction rollers U<1> running on the guides P. The upward movement of the guides P is limited by heads O<2> on the columns O, and at this stage the lifting action of the pawl J is prevented by omitting the teeth at a part S' of the ratchet wheel.
Patent GB-312537-A (GB)
Title: Method and machine for fabricating composite objects
IPC: B23B41/00
Filed: 1928-07-17
Abstract: 312,537. Marks, E. C. R., (Structural Service Co.). July 17, 1928. Columns; girders, &c. are built up from plates, angles, &c. in a machine in which the various sections are loosely assembled in position by hand and are then gripped and held in position by grippers and supporting rollers and are then advanced through the machine, to be drilled and riveted or welded, the advancing and stopping being done by hand control of an electric motor and the drilling and riveting being also started and stopped under hand control. A series of stands; Fig. 4, are located at intervals on the bedplate 20, Fig. 1, each stand carrying a pair of vertical axis rollers 40 and two pairs of horizontal axis rollers 44 and 48 to support the hand assembled girder which is also held by hand screwed clamps 53. All the support rollers are adjustable for various beam sizes. When thus assembled, clamp jaws 33 on a motor driven carriage 23 are advanced by rack and pinion to grip the sections together and then to push it through the machine until the required part comes opposite a battery of drills 58. The carriage motor under the control of operator at the drilling head 54 is then stoped, the operator opening compressed air cocks admitting fluid to upper and lower air cylinders 64, whereupon pistons 65 rise until rollers 68 at end of spreading toggle links 67 grip the angles as shown, and so secure all the sections together by drilling. A battery of drills 58 are then started to drill the holes required. When finished the air cylinders are exhausted and carriage 23 is restarted to push girder in position for the next drilling while the drilled holes are riveted by hand or by known riveters. A second set of toggle links and rollers and mechanism are located on the right of the drilling head and put into operation when the girder projects sufficiently. Also a second carriage is advanced to grip the now riveted end of the girder and pull it through, the first carriage being released to assist assembling the next girder. The girder may be electrically welded instead of drilled and riveted.
Patent GB-1308864-A (GB)
Title: Semiconductor devices
IPC: H01L29/00
Filed: 1971-04-19
Abstract: 1308864 Semi-conductor devices HITACHI Ltd 19 April 1971 [2 Feb 1970] 20828/71 Heading H1K In a field-effect semi-conductor device having a control electrode G provided on a layer of insulating material 9 the semi-conductor material layer beneath the electrode has a first part 4 whose surface lies in a first crystal plane and a second part 5 whose surface lies in a second crystal plane different from the first. The first plane is the (100) plane and the second is the (111) plane. The device may be a F.E.T. with the source 7 in one part of the semi-conductor material and the drain 8 in the other part of the semi-conductor material, or a variable capacitance diode, Fig. 7, not shown. The method of growing the regions of different crystal alignment is described. In another embodiment of the F.E.T. a region of opposite conductivity to the semi-conductor material layer is formed at the junction of the two parts of different crystalline properties, Fig. 2, to improve electrical connection between them. In a further embodiment, Fig. 5, not shown, the surface of the semi-conductor material layer is in the (100) plane but its direction between a point under the control electrode and the drain is etched to have a slope so that its surface lies in the (111) plane. The control electrode may be formed of at least two portions interconnected or one single portion.
Patent GB-852384-A (GB)
Title: Process for preparing dihydroxy alkyl acrylates and methacrylates
IPC: C07C69/54
Filed: 1958-06-30
Abstract: Dihydroxyalkyl acrylates and methacrylates of formula: <FORM:0852384/IV(b)/1> are prepared by hydrolysing with a dilute aqueous solution of a strong mineral acid at 25-60 DEG C. a compound of formula:  <FORM:0852384/IV(b)/2> where R is hydrogen or methyl, n is 1-4, and R1 and R2 are each hydrogen or a hydrocarbon radical, or are together an alkylene group.  The reaction may be carried out in the presence of a free radical polymerisation inhibitor, such as hydroquinone or N,N1-di-2-(1,4-naphthoquinonyl)-p-phenylene-diamine. The starting compounds may be prepared by trans-esterification, as in U.S.A.  Specification 2,680,735.