baber/WOPTO huggingface dataset:
Patent GB-501479-A (GB)
Title: Process for the manufacture of derivatives of sterols
IPC: C07J75/00
Filed: 1938-03-07
Abstract: 501,479. Sex hormones. SCHERING, AKT.-GES. March 7, 1938, No. 7145. Convention date, March 5, 1937. Addition to 449,379. [Class 2 (iii)] The process described in the parent Specification which comprises the oxidative degradation of unsaturated sterol compounds is modified in that in the case where the oxidation is carried out through the medium of chromium compounds free sulphuric acid is present. Among the oxidizing chromium compounds which are mentioned there are included chromic acid, chromyl chloride and dichromates. If desired, the double links present may be protected during the oxidation by the addition of halogen or halogen hydride. Similarly, hydroxyl groups present may be protected by being converted into groups which on hydrolysis are reconverted into hydroxyl groups such as ether or ester groups. It is stated that the presence of sulphuric acid enables the oxidation to be carried out at a lower temperature and allows greater yields to be obtained. Sterols mentioned as suitable starting materials for the process of the present invention include phytosterol, stigmasterol, ergosterol, sitosterol and cinchol. In an example, cholesterol is converted into its acetate by boiling with acetic anhydride, and this is then oxidized with chromic acid in the presence of sulphuric acid after protection of the nuclear double bond by means of bromine. After the oxidation, the bromine is removed with zinc dust and the acidic components by conversion into their alkali salts. The dehydroandrosterone formed is isolated in the form of its semicarbazone. The Specification as open to inspection under Sect. 91 includes also the oxidation of saturated sterols. This subject-matter does not appear in the Specification as accepted.
Patent GB-164496-A (GB)
Title: Improvements in or connected with miners' safety and other electric hand lamps
IPC: F21L4/00
Filed: 1920-03-09
Abstract: 164,496. Oldham, O., (trading as Oldham & Son), Oldham, G., and Oldham, J. March 9, 1920. Reflector and lens holders.-In a miner's or like electric lamp, the lens o and reflector p are secured by a screwed ring n which is engaged by a locking-hook r pivoted on the lamp casing at r<1> and adapted to be sealed at r<3>.
Patent GB-701050-A (GB)
Title: Improvements in or relating to x-ray tubes
IPC: H01J35/14
Filed: 1950-03-22
Abstract: 701,050. X-ray tubes. EHRENBERG, W., and SPEAR, W. E. March 22, 1950, No. 7216/50. Class 39(1) A fine-focus X-ray tube has an electrostatic lens system providing an equipotential surface in the region of cathode potential, said surface surrounding the whole of the discharge path from cathode to anticathode, and increasing in diameter in this direction. The embodiment shown has a hairpin filament 5 carried by a mounting 6, and surrounded by a cylindrical electrode 7. The electrode 7 is extended as a cylindrical member 10, terminating in an anti-corona ring 11, and has an internal diaphragm 8 with a central aperture 9 substantially co-planar with the filament tip. The member 10 need not be integral with 7, and also the ring 11 may be mounted on a separate partition, Fig. 3 (not shown). In this case a small variable p.d. can be applied between the electrodes 7, 10 on the one hand, and the envelope 1 and the partition, for focus correction. The cathode structure is mounted on a bellows and screw arrangement to permit mechanical adjustment from outside the envelope. The anticathode 18 is hollow for water-cooling: The electrodes 7, 10 and metal envelope 1 are all' in the region of cathode potential, i.e., any difference therefrom is small in relation to the p.d. between cathode and anticathode. Thus an equipotential surface in the region of cathode potential surrounds the whole discharge path. This may increase gradually in diameter from cathode to anticathode, or as in the present example, in a single large step. Suitable dimensions are given as a guide to construction. Specification 657;140 is referred to.
Patent GB-690696-A (GB)
Title: Improvements relating to the manufacture of coated strip material for use in making eectric circuit components or printed circuits
IPC: H05K1/02
Filed: 1949-03-17
Abstract: 690,696. Automatic thickness control systems. STRONG, H. V., and EISLER, P. March 16, 1950 [March 17, 1949], No. 7299/49. Class 38 (iv). [Also in Group XL (b)] In order to maintain a constant thickness of coating 78 on a flexible strip 71 in the manufacture of electric circuit components for printed circuits, sources of light, radioactivity, or X-rays 72, 73, are directed on to the strip and the amount of radiation emanating from, transmitted through or reflected by the coating, being a function of the thickness thereof, is detected by radiation sensitive devices 75, 76 the outputs from which are differentially applied to an instrument 77 which through a controller 79 adjusts an applicator 74 to maintain the thickness of the coating constant, irrespective of the thickness of the strip. The control may also be effected manually. In other embodiments the coating itself may form the source of radiation and is then impregnated with dyes or pigments, or with radio-active material, the latter being driven off by heat after coating. one of the sources 72, 73 may be omitted if desired, the strip then being moved round the remaining source and a single detector may be rotated round an axis passing through the source. If two sources are used a differential detector 80 may be provided to compensate for radiation differences between sources 72, 73. Specification 690,328, [Group XXXVI], is referred to. Specification 639,111 also is referred to in the Provisional Specification.
Patent GB-706745-A (GB)
Title: Improved variable-speed power transmission mechanism for vehicles
IPC: F16H61/02
Filed: 1952-03-21
Abstract: 706,745. Disc brakes. GENERAL MOTORS CORPORATION. March 21, 1952 [April 13, 1951], No. 7304/52. Class 103(1) [Also in Groups XXIV and XXIX] Two fluid-pressure applied conical friction brakes 115, 116 are connected to reaction members 147, 141 respectively of a planetary gear-train for engaging a geared low speed drive and reverse (see Group XXIV). The low-speed brake 115 has a two-stage action and comprises an externally coned member 162 fast on the rotating reaction member 147 and moved into engagement with a surrounding stationary cone by oil pressure supplied through a radial passage 185 in a fixed dividing wall 140 to a small inner chamber 163 in which it effects rapid contacting movement of the cone 162 whereafter pressure passes through a restricted cylindrical clearance leading from the inner chamber 163 to a larger main chamber 164 where it builds up more slowly to its full engaging value. In Figs. 9-11, (not shown); the chamber 163 is permanently sealed from 164 and pressure reaches the latter through a restriction direct from the supply duct 185. In the disc of the cone 162 is a ball valve in an oblique channel communicating the main pressure chamber 164 with the air in the gear housing. Braking deceleration rolls the ball-valve to a sealing position in which it traps air in the pressure-chamber 164 for cushioning brake engagement, whilst release of pressure accompanied by forward acceleration after brake release unseats the ball-valve to permit the pressure chamber to refill with air ready for the next brake engagement. The coned friction surface in the casing is coated with sintered bronze, the rotating cone 162 being of steel. The braking pressure of the fluid is increased by end-thrust due to helical teeth of the planetary gear. The reverse brake 116 is not subject to gear end-thrust and comprises an internal and externally coned ring 116 splined on the rotating carrier 141 and clamped to the outer fixed casing by an inner coned ring 180 secured by pins to a non-rotary radially-slotted resilient diaphragm 157 to which a leftward axial engaging thrust is applied at its inner periphery by a piston 170, whereby the diaphragm fulcrums about its outer periphery to apply the brake with a force-multiplying lever action. The piston 170 is actuated by oil pressure applied to a chamber 172 through a duct (not shown) in the fixed dividing wall 140.
Patent GB-714138-A (GB)
Title: Improvements in and connected with gang lawn mowers
IPC: A01D75/30
Filed: 1951-11-05
Abstract: 714,138. Lawn-mowers. RANSOMES, SIMS & JEFFERIES, Ltd., and PLUMB, A. B. Nov. '4, 1952 [Nov. 5, 1951], No. 7464/54. Divided out of 714,086. Class 6 (2) Mower units are combined to form a gang mower by means of a draft frame 6 so that any desired number of mower units may be assembled. As shown, the frame is hinged to the centre frames 11 of the mower units 15 and is provided with means for attaching a mower unit 16. The frame may be combined with the frames 1 described in Specification 714,086 which are each bolted to the centre frames 11 of a mower 15 and are each provided with an eye for attaching a mower 19. By using two frames 6 and two frames 1, seven mowers may be coupled together. Specifications 163,300, [Class 6 (ii)], and 397,726 also are referred to.
Patent GB-488509-A (GB)
Title: Improvements in tensioning devices for transmission chains and the like
IPC: F16H7/16
Filed: 1937-03-15
Abstract: 488,509. Tensioning belts and chains. WELLER, J. March 15, 1937, Nos. 7472, 15003, and 35155. [Class 80 (i)] A sprocket wheel or pulley for taking up slack in a chain or belt is freely rotatable on a bearing A which is mounted eccentrically on a supporting pin B and is urged towards the path of the chain or belt by a loading spring which is mounted directly between pivoted points within or upon the face of the bearing in such a manner that an approximately constant force is exerted by the sprocket or pulley throughout its range of movement. The loading spring may be a bow spring or a coil spring operating in either tension or compression. In one form the loading spring is a compression spring K located in cups L, M pivoted within the bearing at O and N, the pivot N being a pin fixed to an external collar E on the supporting pin B. As the spring extends and the bearing rotates the distance of the line of action of the spring from the supporting pin increases so that although the force exerted by the spring decreases, the turning moment on the bearing is approximately constant. In a modified construction, the loading spring is mounted in a recess at one side of the bearing ; or two springs may be mounted one on each side of the bearing. In another modification, Fig. 8, the cups may be replaced by a U-shaped member L within which slides a flat T-shaped member M. The movement of the bearing in either direction is limited by the pivot pin contacting with the sides of openings P therein. To prevent the bearing rotating away from the path of the chain one or more pawls may be mounted on the bearing and engage a ratchet or ratchets F formed on the collar or collars E of the supporting pin, each pawl being held in engagement with the ratchet by a low spring J pressing against a flat H on the pawl spindle. Alternatively, a ratchet rotatable with the bearing may be engaged by pawls mounted on a boss of the chain case and embraced by a spring ring engaging flats on the pawl spindles. According to the second Provisional Specification, when a tension spring is used on the face of the bearing one of its pivots may be located outside the periphery of the bearing being carried on an extension thereof. This Specification also states that a pawl spindle may be utilized as one of the spring pivots.
Patent GB-294090-A (GB)
Title: Improvements in or relating to machines for shaving or resurfacing phonograph records
Filed: 1928-03-10
Abstract: 294,090. Haddan, R., (Dictaphone Corporation). March 10. 1928. Planing record.-In a machine for re-surfacing cylindrical records, the shaving knife and its setting gauge, the means for feeding and locking this in position for successive cuts, and the record ejecting mechanism, are operatively related to a lever or handle by which the sequence of the action is automatically effected or controlled. The holder 45, Fig. 1, for the sapphire or like knife 39, burnisher, &c. and the setting gauge 49, connected by an adjustable crossbar 50, are mounted in a block 46 pivoted in a frame 17, Fig. 6, provided with a lifting knob 18 and adapted to be traversed along a, guide bar 15 and a guide rail 20 by a part nut 41 engaging the usual feed screw 40 driven from the mandrel shaft 22. The shaft. 22 the mandrel 24 for the record 34 is supported during the shaving operation by a lover 26 mounted on a pivot 27 and held in operative position by a, trigger catch 31. After a surfacing operation, the frame 17 is raised to disengage the half nut 41 and returned to starting position shown in Fig. 1. In this movement a pawl carrier 75 pivoted to the frame 17 is carried against a fixed lug 81 so that the pawl 74 advances a cam disc 67 to rock the knifecarrying block 46 into position for a secondary cut when this is necessary, such feed taking place automatically on each return of the lever 17. The cam disc is normally held by a tooth 77 on a pivoted bracket 78 which engages a notch 86, Fig. 6, in a finger lever 59 on a spindler 55 having a cam or eccentric part 56 which locks the knife holder in adjusted position in the block 46. When the record is sufficiently shaved, the supporting lever 26 is released and swung round on its pivot 27, leaving the shaft 22 resting on a support 32, and a cam 98, Fig. 1, on the lever pivot acts through a rock lever- 99 to slide a. bar 101 guided on a pin 103. In this movement a spring-controlled arm 105 pivoted on the bar first rocks an arm 108. shaft 59, and lever 94 to advance an ejector 93, Fig. 6,. to release the record, the arm 105 being subsequently tripped from engagement with the arm 108 by a lug 109 riding on a cam surface 110 of the arm 108 so that the ejector can be retracted by the spring 92. As the arm 108 is rocked a rod 115 thereon rocks a T-lever 114 to project. a stud 118 against the bracket 78, thereby disengaging the tooth 77 so that the cam disc can be restrained by a spring, the block 46 can be returned to initial position by a spring plunger 65, and the finger lever 59 is rocked against its spring to release the knife-holder in the block. The record cam now be removed and another inserted on the mandrel when, after closing the lever 26, the parts are all in position for resetting the knife. The shavings fall down a shoot 47 and through an aperture 48 in the base.
Patent GB-1280795-A (GB)
Title: Cables
Inventor: SPICER LYNDON REGINALD
IPC: H01B13/02
Filed: 1971-03-23
Abstract: 1280795 Cables STANDARD TELEPHONES & CABLES Ltd 23 March 1971 7544/71 Heading H1A A multiple conductor cable is made by simultaneously screening individual insulated conductors from one another by applying conducting material, possibly metallic tape, around the conductors and laying up the screened conductors. In Fig. 2, a rotatable structure 7 has supply reels 9, loaded with unscreened insulated conductors 10, an additional reel 11 loaded with a wide metallic tape 12, e.g. of copper, and a device 13 by means of which the tape is formed, at least partially, around each of the conductors 10. The screened conductors 14 are then passed through a forming die 21 which serves to form the laid up screened conductors into a cable 15. In Fig. 5 device 13 comprises a truncated cone, in which grooves 17 are provided, the grooves increasing in width and decreasing in depth in the direction away from the apex of the cone. In each groove there is a shaped tape guide member 18 mounted, e.g. by a collar 19 and a screw 20, so that a slot is provided between the guide and groove. As the tape passes through the slots it is formed into a member of star-shaped cross-section (22, Fig. 7, not shown) and an insulated conductor 10 can be dropped into each recess between adjacent arms of this member if the conductor is directed along a path 24.
Patent GB-111083-A (GB)
Title: Improvements in or relating to Means for Securing Railway Rails to Ties or Sleepers.
Inventor: HUNKLE FREDERICK PHILIP
IPC: E01B9/32
Filed: 1917-05-25
Abstract: 111,083. Hunkle, F. P. Nov. 6, 1916, [Convention date]. Sleepers, securing rails to.-Railway sleepers having flanges, for example I-section, are formed near each end with openings 4 in which rail-clamping levers 7 are fulcrumed. The inclined depending arms 5 of the levers are engaged by an horizontally movable wedge 8 also engaging the base flange of the sleeper whereby the arms 5 are forced upwards and the rails clamped in position. The wedge is formed with an offset portion 9, Fig. 6, between which and the sleeper the arms 5 is securely held. After adjustment, the wedge is locked by a bolt 14, the nut of which is serrated to engage the serrations 12 on the wedge.
Patent GB-1338520-A (GB)
Title: 6-amino-9-benzyl purine derivatives
IPC: C07D473/00
Filed: 1972-02-18
Abstract: 1338520 6-amino-9-benzylpurine derivatives INTERNATIONAL MINERALS & CHEMICAL CORP 18 Feb 1972 [3 March 1971 4 Feb 1972] 7644/72 Heading C2C Novel compounds of formula  wherein n is 0 or 1, and R<SP>1</SP> and R<SP>2</SP> (a) individually are of the group consisting of hydrogen, halogen, nitro and trihalomethyl, provided that at least one of R<SP>1</SP> and R<SP>2</SP> is other than hydrogen, not more than one of R<SP>1</SP> and R<SP>2</SP> is of the group consisting of nitro and trihalomethyl, and R<SP>1</SP> and R<SP>2</SP> are located in the 2 and 6 positions on the carbocyclic portion of the compound, or (b) are both methyl and are located in the 3 and 4 positions on the carbocyclic portion of the compound are prepared by reacting adenine and the appropriate benzyl halide and optionally reacting the product with hydrogen peroxide or a peracid. Compositions having anti-coccidiosis activity comprise an above novel compound and a carrier therefor.
Patent GB-393044-A (GB)
Title: Maternity belt
IPC: A61F5/03
Filed: 1932-03-16
Abstract: 393,044. Abdominal belts. WHITING, (known as TILLMAN), A., 37, Nutley Lane, Reigate, Surrey. March 16, 1932, No. 7737. [Class 141.] A belt for supporting the abdomen during maternity comprises two panels a, b both being slightly shaped as indicated, elastic strips c, d, e, f, and adjusting slides g, h. The adjusting slides may be provided on either pair of elastic strips. Specification 15770/15, [Class 141, Wearing-apparel], is referred to.
Patent GB-1300150-A (GB)
Title: Triple gob mold holder arm construction
IPC: C03B11/16
Filed: 1970-02-18
Abstract: 1300150 Glass forming machine mould holder EMHART CORP 18 Feb 1970 [18 Feb 1969] 7746/70 Heading C1M A mould holder for a glassware forming machine comprises two primary mould holder arms 12, 14 pivotally mounted for opening and closing movement, each primary arm carrying a fixed insert 48, 50, which in turn carries a mould half 26, 32, and a pivotally mounted secondary arm 38, 36 which carries two other mould halves 24, 28, 30, 34. The primary arm 14 has its fixed insert 50 and associated mould half 32 mounted adjacent the outer end thereof and opposite the outermost mould half 34 of the secondary arm 36 on primary arm 12, whereas the primary arm 12 has its insert 48 and associated mould half 26 mounted adjacent the inner end thereof opposite the innermost mould half 24 of the secondary arm 38 on primary arm 14.
Patent GB-1130814-A (GB)
Title: Improvements in or relating to output signal control devices
Inventor: BUTTERWORTH HAROLD MILLMAN
IPC: G01N23/08
Filed: 1967-02-20
Abstract: 1,130,814. Transducer calibration apparatus. M.E.L. EQUIPMENT CO. Ltd. Feb. 20, 1967, No.7884/67. Heading G1A. A potentiometer 3 in circuit with an electrophysical transducer 1 is automatically adjusted so that the transducer produces a required output in response to a standard input. The arrangement is described in connection with obtaining the same response from eight photo-multipliers in a potato stone sorting machine. When handle 4 is pulled to the left, photo-multiplier 1 is energized by a source of X-rays 2 through a filter 9 which sets the standard, and contacts 10 are closed to connect the output of a comparator 12 in which the photo-multiplier output is compared with a standard, to an electromagnetic clutch 11 in a geared drive between the bar of handle 4 and potentiometer 3. The return of the bar by spring 6 which drives the potentiometer wiper is controlled by a governor 14, and projection 7 from the bar trips the contacts 10, and removes filter 9.
Patent GB-1099112-A (GB)
Title: Fluid control valves
Inventor: ELLOY MARTIN ARTHUR
IPC: F15B13/04
Filed: 1964-02-26
Abstract: 1,099,112. Valves; hydrostatic transmissions. JOSEPH LUCAS (INDUSTRIES) Ltd. May 19, 1965 [Feb. 26, 1964], No. 7930/64. Headings F2C and F2V. An hydraulic motor 10 and pump 11 in a motor vehicle transmission system, Fig. 1, are provided with a boost pump 14 to supply fluid, past non-return valves 16 and 17, from a reservoir 15 and are each controlled from manually-operated levers 39 which operate spool valves 18 and 19 to supply operating fluid to piston motors 12 and 13 respectively, the cylinder blocks 29 whereof are pivotally connected to swash plates 22 and 25 and the pistons whereof are connected to a common non-rotatable valve plate 28. In the midway position of spool 31 the fluid pressure inlet 32 to valve 19 is closed from valve ports 33 and 34 by lands 31b and 31c and, upon moving the spool in either direction, pressure fluid is supplied to one of the valve ports 33 and 34 and exhaust fluid passes from the other to exhaust ports 37 or 38. Lands 31e or 31f, of smaller diameter than valve bore 30, throttle the fluid supply to ports 33 or 34 until the lands 31e or 31f reach the edge of outlet 33 or 34, whereupon a slidable washer 45 abuts the end of the block 29 so that further change to full unrestricted flow is indicated by a change in resistance provided by springs 43.
Patent GB-512499-A (GB)
Title: Improvements in or relating to fire resisting safes, cabinets and the like
IPC: E05G1/024
Filed: 1938-03-15
Abstract: 512,499. Safes &c. POWER, R. F. March 15, 1938, No. 7940. [Class 44] Heat transmitted to the interior of a fireresisting safe &c. is dissipated by conducting it away from the top thereof by a conductor 6 to a container 3 for a solid or liquid which will be converted into a vapour or gas thereby. The vapour or gas is preferably discharged into the safe interior. De-aerated water or solid or liquid carbon dioxide may be used. The conductor 6 may be lagged. by paper &c. or painted to retard transmission of heat. In Fig. 2, the container 3 contains water and the cylinder 8, carbon dioxide, sealed therein by a heat fusible seal 9. The outlet 5 from the container 3 into the safe is sealed by a heat fusible seal 7. In Fig. 3, the tube 11, provided in the top of the safe, provides a thermocycle with the container 3. The safe is lagged at 10 by diatomaceous earth &c.
Patent GB-787434-A (GB)
Title: Piston ring
Inventor: BARKER RONALD ABRAHAM
IPC: F16J9/00
Filed: 1955-03-18
Abstract: 787,434. Making piston rings. SPECIALLOID, Ltd. March 19, 1956 [March 18, 1955], No. 8004/55. Class 83 (2). A process of making a piston ring of the oil control type comprises machining the groove, step or like recess of the ring to a depth less than that finally required, subsequently oxidizing the surface of the ring, machining the working face or lands of the ring to remove the oxide and leave the lands the required size for chromium plating, subjecting the ring to a chromium plating process, and then further machining the groove, step or like recess, and providing any required ventilation apertures. In an embodiment a turned or centrifugally cast ring 1 is expanded by a spacer 2 and then heat treated to relieve the stresses and also to oxidize the ring surface. In another embodiment the ring is turned or cast to the expanded size 3 and a portion 4 is cut away and the oxidation step is carried out by a liquid oxidizing agent, or by heating in air. The process avoids the need to file or blank off the recess and ventilation apertures since the oxidized surface resists the deposition of chromium and is removed only where the plating is required.