baber/WOPTO huggingface dataset:
Patent GB-566935-A (GB)
Title: Improvements in devices for sharpening razor blades
IPC: B24D15/08
Filed: 1943-07-15
Abstract: 566,935. Sharpening razors. WALKER, S. W. July 15, 1943, No. 11526. [Class 60] Apparatus for sharpening safety-razor blades comprises a. hollow cylinder 1 of metal, or metal coated with vitreous &c. substance which may be impregnated either throughout the body or in the surface only with abrasive material, closed at one end and provided at the closed end with a spindle 2 having a crank 3. The spindle runs in a bearing in a frame 4 provided with a hand grip 5 so formed that a finger may hold the blade 6 flexed within the cylinder, with pressure suitable either for stropping or for honing, whilst the crank is rotated by the other hand. In a modification, a string is wound one turn round the cylinder, which in this instance has no crank, one end of the string being fixed and the other held by one hand, the frame of the device being held by the other hand and moved, whilst flexing the blade in the cylinder, to and fro along the string.
Patent GB-1388046-A (GB)
Title: Pregnano 17,16alpha-d-1,3,-oxathiolans
Inventor: HOFMEISTER H
IPC: C07J71/00
Filed: 1972-03-13
Abstract: 1388046 Pregnano - [17,16α - d] - 1<SP>1</SP>,3<SP>1</SP>- oxathiolans SCHERING AG 13 March 1972 [17 March 1971] 11527/72 Heading C2U Novel steroids of the formula (wherein R<SP>1</SP> and R<SP>2</SP> are each H, an optionally substituted aliphatic hydrocarbon group, a cycloaliphatic hydrocarbon group which may be substituted and/or interrupted by a hetero atom, or an optionally substituted aryl or heteroaryl group or together are -(CH 2 ) n , where n is 2, 3, 4, 5 or 6, which may be interrupted by a hetero atom; R<SP>3</SP> and R<SP>4</SP> are each H or together represent -CH 2 - or a #<SP>1</SP>-double bond; X is H, a halogen atom or an alkyl group and is in alpha configuration when #<SP>6</SP> is absent; and there is a single or double bond at C 6 -C 7 ) are prepared from the corresponding 16#-hydroxy-17α-mercapto steroids and aldehydes or ketones R<SP>1</SP>R<SP>2</SP>CO in the presence of an acid catalyst. In the products a double bond may be introduced into the 1,2- and/or 6,7-positions and a 1α,2α-methylene bridge may also be introduced. 6 - Chloro - 16# - hydroxy - 17α - mercapto - 4,6- pregnadiene-3,20-dione is prepared from 17α- bromo-16#-hydroxy-4-pregnene-3,20-dione via 17α - bromo - 16# - hydroxy - 4,6 - pregnadiene- 3,20 - dione, 17α - bromo - 16# - hydroxy - 6α,7α- epoxy - 4 - pregnene - 3,20 - dione, 6 - chloro- 17α - bromo - 16# - hydroxy - 4,6 - pregnadiene- 3,20 - dione and 6 - chloro - 16#,17# - epoxy- 17α-pregna-4,6-diene-3,20-dione. 16# - Hydroxy - 17 - mercapto - 4 - pregnene- 3,20 - dione is prepared from 16#,17#-epoxy- 17α-pregn-4-ene-3,20-dione and H 2 S. The novel steroids possess gestagenic activity and may be used, optionally in combination with other steroid hormones, for the treatment of various gynaecological disorders and as contraceptives.
Patent GB-972657-A (GB)
Title: Improvements in housings for choke coils
IPC: F21V23/02
Filed: 1962-03-27
Abstract: 972,657. Inductors. E. LENZE, [trading as TRILUX-LENZE KOMM.- GES.]. March 27, 1962 [Aug. 7, 1961; Oct. 27, 1961], No. 11558/62. Heading H1T. A method of mounting a choke in a light fitting to provide good conduction cooling together with a low acoustical noise level consists of clamping the base of the choke 1 against either an indentation 3 in the metal housing 2 of the fitting or against a metal spacer which may take the place of the indentation. Feet on the choke may be sandwiched between rubber buffers 4, 5 before bolting to the housing and metal plates may be connected to the outside of the housing to improve heat dissipation. These plates may pass through slots into the housing and there abut the sides of the choke to improve further heat conduction and may additionally be used to clamp the choke to the housing (Fig. 2, not shown).
Patent GB-800121-A (GB)
Title: Improvements in and relating to identifying devices
IPC: E05B19/24
Filed: 1956-04-16
Abstract: 800,121. Identifying devices for keys. BURDIN, M. A., and DYMSZA, T. Sept. 5, 1956 [April 16, 1956], No. 11569/56. Class 73 An identifying device for lock keys is formed from a moulding of thermoplastic material and comprises two similar apertured disc portions 12, 13, Figs. 4, 5, spaced apart by a connecting flange 16 extending partly around their peripheries and adapted to receive therebetween the finger-grip of a key so that the apertures 14, 15 coincide with the usual aperture 19 in the finger-grip, the key being identified by a distinctive colour of the device and/or by projections located on the flange 16 or on the faces of the discs. The unconnected parts of the two discs converge as shown in Fig. 4 so that they resiliently grip the finger-grip when it is inserted. The two discs may be formed with half sleeves 30, 31, Fig. 10 (not shown) adapted to grip the upper end of the stem of the key. According to the Provisional Specification the device may be made of sheet metal.
Patent GB-780354-A (GB)
Title: Improvements in and relating to dry gas meters
Inventor: GASKIN RICHARD DONALD
IPC: G01F3/22
Filed: 1955-04-21
Abstract: 780,354. Gas meters. UNITED GAS INDUSTRIES, Ltd. April 19, 1956 [April 21, 1955], No. 11609/55. Class 54. A diaphragm for a dry gas meter has duplicate flexible parts 9, 10 spaced apart and the space between them is in communication with the exhaust passage 22 of the meter so that they are cushioned as they flex and always assume the same disposition in their limiting positions. In Fig. 1, the outer edges of the flexible parts 9, 10 are clamped between the inner flange of a channel-section support member 11 and the flange of a dished member 4 and between the outer flange of the member 11 and a retaining ring 16, the assembly being maintained gastight by clips 18 bolted to brackets 17. The middle areas of the parts 9, 10 are cemented to a centre plate or nipped between clamping discs 20. The supporting member 11 may alternatively be a solid ring with bolts passing through it to clamp the flexible parts and to secure it to the member 4 or may be formed by an extension of the member 4 with depressions in which the part 9 is secured by spring rings and with an outer bead to which the part 10 is secured by a length of straining wire. To increase the size of the space between the flexible parts, the clamping discs 31, Fig. 4, may be dished at an angle and the flexible parts clamped to the discs by a riveted V-shaped member 32 formed in one or more sections, or the discs may be spaced apart over their whole areas by a channel section member corresponding to the member 32.
Patent GB-950635-A (GB)
Title: Improvements in or relating to mining machines having drum-type cutters
IPC: E21C25/14
Filed: 1961-03-30
Abstract: 950,635. Mineral-mining machines. GEB. EICKHOFF MASCHINENFABRIK UND EISENGIESSEREI. March 30, 1961 [April 23, 1960], No. 11609/61. Heading E1F. To facilitate removal of mined mineral from a cutter drum disc there are positioned about the curved periphery of a cutter drum 2 of a mineral-mining machine deflectors 6 of the shape shown for causing mineral detached from a seam by the picks 5 of the drum to move outwards of the seam across the drum.
Patent GB-705191-A (GB)
Title: Improvements relating to pallets
Inventor: BELL ROBERT DUMVILLE
IPC: B65D19/42
Filed: 1951-05-18
Abstract: 705,191. Castors: RUBERY, OWEN & CO., Ltd. May 2, 1952 [May 18, 1951], No. 11631/51. Class 52(1) [Also in Group XXXII] A castor unit. which fits detachably into the foot 11a of a pallet, comprises a complementary shaped part 15a which transmits the load via a ballrace 24a to the wheel-carrying fork 22a. The ball-race may instead be positioned between flat upper surfaces of the fork 22a and the part 15a.
Patent GB-642214-A (GB)
Title: Improvements in cigarette or the like lighters
IPC: F23Q2/06
Filed: 1948-04-28
Abstract: 642,214. Frictional lighters. FLORMAN, I. April 28, 1948, No. 11670. [Class 75(iii)] I n a cigarette lighter a pivoted spring-actuated cover 22 i s operatively connected to the wick igniting means by a mechanism comprising a lever 38, 40 pivoted about an axis parallel to the axis of the cover and carrying on its free end a roller 56 which rollably engages the inner surface of the cover, and the cover latch mechanism includes an elongated roller 64 rotatably mounted in a recess in the body of the lighter. The roller 64 which may be round or polygonal in section is mounted on a shaft 60 the upper end of which is secured to a member 80 having an upstanding pin 82 with an enlarged cone shaped head 84 which engages the end of an arm 86 on the cover 22 to hold the cover closed. The position of the member 80 can be vertically adjusted to ensure an airtight closure for the cover by bending part of a plate 74, Fig. 3, preferably made of resilient metal disposed between the member 80 and the top wall of the lighter body. Rotation of the shaft 60 is opposed by a coiled spring 70 located in a recess in the bottom of the roller 64. The lever 38, 40 consists of two arms pivoted on a shaft 34 journalled in two upstanding ears 16 connected by a cross piece 18 secured to the top of the lighter. A flint wheel 36 is also mounted on the shaft 34 and a spring 48 coiled around the shaft acts between the top of the lighter and a pin 54 on one arm 40 of the lever; the other arm 38 has a pin 42 engaging a hole in a pawl 44 cooperating with ratchet teeth on the flint wheel. The cover is pivoted on a shaft 20 also extending through the ears 16 and the cover carries a wick snuffer 32 mounted on a coil spring.
Patent GB-961525-A (GB)
Title: Mooring screws
Inventor: RICHARDSON RICHARD JOHN
IPC: E02D5/80
Filed: 1963-03-25
Abstract: 961,525. Ground anchors. BROWN LENOX & CO. Ltd. March 25, 1963, No. 11685/63. Heading E1B. A mooring screw for anchoring in the bed of harbours, rivers, &c., is provided with a helical screw formation the leading edge of which is step-shaped 1, 2. The screw flange is tapered from its centre to its perimeter and also the leading edge is tapered from the underside to facilitate a cutting action.
Patent GB-376845-A (GB)
Title: Improvements in or relating to brake mechanism for perambulators and like light wheeled vehicles
IPC: B62B5/04
Filed: 1931-04-21
Abstract: 376,845. Vehicles brakes. COOPERATIVE WHOLESALE SOCIETY., Ltd., 1, Balloon Street, Manchester, and GREENHALL, C., 123, Douglas Road, Acocks Green, Birmingham. April 21, 1931, No. 11739. [Class 103 (i).] A brake for perambulators and like vehicles comprises a pair of levers f each pivoted at g to the adjacent longitudinal member of the chassis and carrying a brake pad for engaging the wheel tyre. The levers are interconnected by a pin-and-slot i and are operated by a footlever p<2> and link m connected to an extension of one of the levers. The lever p<2> is cranked for pivotally mounting on a bar q secured to the axle c and carries a lever arm p<1> connected to the link m. A spring extending from the lever p2 to the bar q is arranged to hold the brake in both the applied and released positions.
Patent GB-345837-A (GB)
Title: Improvements in pile drivers
IPC: E02D7/10
Filed: 1930-04-14
Abstract: 345,837. Pile drivers. DEMAG AKT.- GES., Duisburg, Germany. April 14, 1930, No. 11815. Convention date, April 13, 1929. [Class 68 (ii).] In a pile driver operated by fluid-pressure, e.g. compressedair or gas, steam, or water, operating on a differential ram, the annular surface is continuously under pressure, while the other surface is alternately under pressure and open to the atmosphere. The Figure shows a ram 2 which is moved in a cylinder 1 and guided by a shaft 3 in the upper part 4 of the cylinder, so that in its fall it strikes the head 6 on the pile 7. Pressure-fluid, (steam, compressed-air, or water), is supplied through a port 11 to the annulus 12 between the parts 1, 3, driving the ram down; the exhaust passes through the port B and by the valve 10 to the exhaust port 14. Just before the ram strikes the head 6 the upper edge 15 of the ram uncovers the control port 16 leading to the underside of the valve 10, which is lifted, as the upper part 18 of the valve casing is connected with the atmosphere through the port 19, the annulus 20 in the ram 2, the ports 21, 22, 24, and the chamber 23. Both ends of the ram 2 are now under pressure and the ram 2 is lifted until the port 19 is again uncovered, when the steam &c. passes into the chamber 18 and forces the valve 10 down.
Patent GB-371601-A (GB)
Title: Improvements in or relating to pyrophoric lighters
IPC: F23Q2/08
Filed: 1931-04-21
Abstract: 371,601. Frictional pocket igniters. CURWEN & CO., Ltd., W. M., 6, Emerald Street, London. April 21, 1931, No. 11844. [Class 75 (iii).] A device for taking up wear of the flint in an igniter, such as described in Specification 364,306, comprises a hollow cylinder 16, closed at the inner end by a screwplug 27, supporting the flint spring 17, and adapted to be screwed along the flint tube 15 by the rotation of a shaft 19 of polygonal section engaging in a hole of similar shape in the outer end of the cylinder, a compression spring 26 being arranged around the shaft between the head 24 of the latter and the bottom of the cylinder. The shaft is provided with a disc 20 cut with a screwdriver slit 21 and located in a recess in the fuel container. Specifications 278,332, 302,843, [both in Class 75 (iii), Lamps &c., Details &c.], and 358,801 also are referred to.
Patent GB-781578-A (GB)
Title: Improvements relating to processes for the refining of naphthenic acids by distillation
Inventor: MANSON CECIL THOMAS
IPC: B01D3/14
Filed: 1954-04-23
Abstract: Crude naphthenic acid is refined by distilling it under reduced pressure using a fractionating column, a temperature of from 280 DEG to 370 DEG  F., and a pressure of from 5 to 25 mm. Hg being maintained at the top of the column, so as to remove the more volatile hydrocarbon impurities in the overhead fraction, and then submitting the bottom fraction to straight distillation whereby a pale-coloured product of enhanced acid-value, suitable for use in the paint industry, is obtained as distillate.  The fractionation step may be carried out in the presence of steam. The overhead fraction may be saponified to recover from it the valuable low molecular weight naphthenic acids.  In an example, crude naphthenic acid having an acidvalue of 158.3 and an unsaponifiable content of 23.6 per cent was preheated to 195 DEG  F. and submitted to distillation in a still surmounted by a column packed with ceramic rings and equivalent to 6 theoretical plates. The still was divided into sections heated at progressively higher temperatures, that of the last section being 435 DEG  F.  The pressure at the top of the column was maintained at 10 mm. Hg; and about one-fifth of the feed was taken off in the overhead fraction.  The liquid withdrawn from the last section of the still was submitted to straight distillation at a pressure of 5 mm. Hg, giving a distillate (66 per cent yield) having an acid-value of 188 and an unsaponifiable content of 10 per cent.
Patent GB-639823-A (GB)
Title: Improvements relating to the manufacture of luminescent materials
IPC: C09K11/59
Filed: 1946-04-17
Abstract: 639,823. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). April 17, 1946, No. 11871. [Class 39 (i)] A luminescent material in the dry powdered form for use in an electric discharge tube has a bulk density of not greater than one-third and preferably of less than one sixth of the true density of the material forming the powder. Where the luminescent material is a mixture of several powders each of said powders has a bulk density of not greater than one third and preferably of less than one sixth of the true density of the material forming such powder. Example given is the production of zinc beryllium silicate from zinc oxide, beryllium oxide and silca. Specification 484,511, [Group XX], is referred to.
Patent GB-310874-A (GB)
Title: Arrangement for the transformation of light variations into changes of electric current or voltage
IPC: H01L31/07
Filed: 1929-04-17
Abstract: 310,874. Siemens & Halske Akt.- Ges. May 2, 1928, [Convention date]. Light-sensitive cells. -The photo-electric effect is produced at the boundarv between two materials for example copper 1 and cupric oxide 2, where there is a resistance independent of the thickness of the two materials. The surface of the copper or other material is coated with a layer about 1/20th mm. in thickness of a compound of the metal, for example the oxide or sulphide, and this layer is covered with a grid-shaped electrode 3 of good conducting material. Alternatively the call is illuminated through the metal layer, which is made of foil permeable to light and covered by an integral wide-meshed grid (Fig. 2, not shown). An electric potential less than one volt is applied to the layers from a potentiometer 5 in a direction depending on whether the metal or the compound is illuminated.
Patent GB-212777-A (GB)
Title: Improvements in or relating to pencil holders for blackleads, crayons or the like
IPC: B43K23/00
Filed: 1923-05-03
Abstract: 212,777. Keyser, H. R. May 3,1923. Pencil and like holders; pencil and like point-protectors. -In holders for loose leads, crayons, chalks, &c. of the kind comprising a casing 1, Fig. 1, formed with conically tapered jaws 1<a> engaged by a cylindro-conical clamping sleeve 5, the latter is constructed so that by a slight longitudinal displacement it serves either as a point protector, in the position shown, or to clamp the lead &c. in writing position. The opening in the apex of the sleeve 5 is just large enough to allow a lead L of thickness, corresponding to the bore. 2 in the casing to slide freely through it, and the angularity of the conical parts of the jaws 1<a> and the sleeve 5 is such that leads of smaller thickness can be clamped. A gauge mark 6 is provided on the casing to facilitate adjustment of the length of lead projecting when the sleeve is in writing position. The lead and sleeve are pushed inwards together by the finger until the inner end of the sleeve registers with the mark 6, in which position the lead is lightly clamped by the cylindrical part of the sleeve and then the sleeve only is moved to clamp the lead tightly. The sleeve may be split throughout or in the cylindrical part only, and may be provided with a sliding collar engaging wedge-shaped projections to secure it in position. The cylindrical part of the sleeve may be fluted. The casing 1 may be made of wood, in two halves glued together, with the bore 2 closed at one end by a metal cap 3; or two separate halves may be held together by a cap or ferrule. A tubular metal casing may be used, as shown in Fig. 7, in which case the tapered jaws 1<a> are supplemented by an internal rubber washer 11, or by two or more internal segments.
Patent GB-502842-A (GB)
Title: Improvements in or relating to roller mills
IPC: B02C4/42
Filed: 1938-04-21
Abstract: 502,842. Roller mills. ATELIERS DE CONSTRUCTION L. M. S. SOC. ANON., FREROTTE, A., and PERMENTIER, P. R. DE. April 21, 1938, No. 11994. [Class 59] In a roller mill in which the movable roller is carried by pivoted arms, subjected to the action of springs which tend to force the roller into contact with the fixed roller, the movable roller is driven symmetrically or substantially symmetrically with respect to its median plane. As shown a movable roller 3 is carried by pivoted supports 4 and is adjustable rela. tively to a fixed roller 2. Each end of the fixed and movable roller is driven by a belt 7 engaging pulleys 5. The rollers are driven at different speeds and in order to equalize the drive at the end of rollers a differential gear, clutch, &c. may be inserted in the drive shaft 6.
Patent GB-585912-A (GB)
Title: Improvements relating to the calibration of cathode-ray oscillographs
IPC: H03K5/145
Filed: 1941-09-18
Abstract: 585,912. Cathode-ray oscillographs; calibrating instruments. SCOLES, G. J., MILLER, C. W., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Sept. 18, 1941, No. 12005. [Class 37] A circuit for calibrating a cathode ray tube time base comprises a valve, the grid of which receives recurrent steep wave front voltage pulses, whilst its circuit has a low decrement or includes a piezo crystal, so as to provide a train of undamped calibrating waves in the valve anode circuit, which has a high ratio of reactance to resistance or is a piezo crystal filter. A pentode V1 has applied to its control grid recurrent steep-fronted voltage pulses derived from the time -base generating circuit. The grid circuit comprises an inductance L1 and condenser C1, this circuit having a high ratio of capacitance to inductance or including a piezo crystal. The anode circuit L2,C2 has a high ratio of reactance to resistance, or may alternatively be a piezo crystal filter. The output of the valve V1 is applied to the control grid of a second pentode V2 by means of a coupling coil L3. The valve V2 is normally biassed beyond cut-off by resistances R1, R3 so that the control grid requires a positive drive before current is passed as positive peaks of the sine wave drive. A variable resistance R2 in series with a switch S is connected across the resistance R1 and enables the bias on the valve V2 to be varied. The valve V2 has a resistance anode load R4, across which appear a series of short voltage pulses which are applied to the grid or cathode of the cathode ray tube. By opening the switch S the valve V2 is biassed so as to pass no current, thus removing the calibration marks from the time base. A beam trapping circuit may be added, including a third valve V3, to the control grid of which is applied the beam trap voltage pulses. The anode load of the valve V3 may be the resistance R4 in the anode circuit of the valve V2.
Patent GB-962149-A (GB)
Title: Improvements in and relating to window supporting and controlling fitments
Inventor: WALLIS PETER REGINALD
IPC: E05D15/44
Filed: 1962-03-29
Abstract: 962,149. Hinges. SMITH WALLIS & CO. Ltd. Feb. 4, 1963 [March 29, 1962], No. 12007/62. Heading E2F. A hinge fitment for a projected window of the type which is adapted to be opened by being pivoted outwardly about an axis at the upper horizontal edge of the movable frame comprises a main stay 3 adapted to be pivotally connected at its upper and lower ends 4, 5 to the movable and fixed frame respectively, a slide member 9 engaging a guideway 8 adapted to be secured vertically on the fixed frame 2, a supplementary stay 13 pivotally connected at its upper and lower ends 15, 14 to the slide member and the main stay respectively, and a link 10 pivotally connected at its lower end 12 to the slide member and adapted to be pivotally connected at its upper end 11 to the movable frame 1, the relation between the dimensions of the stays and the link and the spacing of the pivot points being such that all the pivots will lie in the same vertical plane when the window is closed and the upper edge of the movable frame will move outwardly at a slower rate than the lower end. Preferably the main stay and the link are pivoted to an attachment bar 6 adapted to be fastened to the movable frame, the upper end 26 of this bar being pointed to co-operate with a complementary formation 28 at the top of the guideway when the window is closed. The slide 9 has a recess in which is located an expandable member comprising (Figs. 7, 9) two blocks 20, 21 constituting a rectangular formation divided along a diagonal. Centrally within this formation is a rectangular aperture 22 containing two shallow wedge-shaped blocks 24 coupled by a screw 25. Manipulation of the screw draws the blocks 24 together so that they co-operate with the tapered edges 23 of the aperture to force the blocks 20, 21 outwardly into frictional engagement with the sides 16 of the guideway. The link 10 and supplementary stay 13 may if desired be pivoted to the slide 9 at the same point.