baber/WOPTO huggingface dataset:
Patent GB-471803-A (GB)
Title: A process for separating stereoisomeric alcohols of the androstane series
IPC: C07J1/00
Filed: 1936-02-05
Abstract: Stereoisomeric alcohols of the androstane series are separated by esterifying them with monobasic carboxylic acids and fractional crystallization of the esters.  In examples: (1) a mixture of cis- and trans-androsterone is acetylated by means of acetic anhydride and crystallized from methyl alcohol or hexane, giving cis-androsterone acetate; the residue from the completely evaporated mother liquor is crude trans-androsterone acetate which on saponification with alcoholic alkali gives trans-androsterone which may be recrystallized from ether; (2) the same mixture is separated by esterifying by benzoyl chloride in pyridine, the trans-androsterone benzoate being the less soluble in this instance; (3) a mixture of cis-and trans-dehydroandrosterone obtained by catalytic reduction of D <5>-androstene-dione is similarly separated by acetylation and crystallization and the corresponding hormones obtained by saponification; cis- and trans-D <4>-dehydroandrostane-3-one-17-ols may be similarly separated; (4) a mixture of D <5>-dehydroandrostane-3-trans-17-trans-diol-3-acetate and D <5>-dehydroandrostane - 3 - trans - 17 - cis - diol - 3 - acetate, obtained by catalytic hydrogenation of transdehydroandrosterone acetate in alcoholic solution in presence of nickel, is heated with benzoyl chloride and pyridine, and the resulting benzoates fractionally crystallized and partially or completely saponified to give the corresponding diols or their monobenzoates, viz. D <5>-dehydroandrostane-3-trans-17-trans-diol, D <5>-dehydroandrostane-3-trans-17-trans-diol-17-benzoate, D <5>-dehydroandrostane-3-trans-17-cis-diol, and D <5>-dehydroandrostane-3-trans-17-cis-diol-17-benzoate.  The dehydroandrostanediol-3-acetates and 3-formates can be similarly separated by their 17-propionates, butyrates, or valerates, and D <5>-dehydroandrostane-3-trans-17-trans-diol-3-acetate-17 -propionate and D <5>-dehydroandrostane-3-trans-17-cis-diol-3-acetate-17 -propionate are described.
Patent GB-642111-A (GB)
Title: Improvements in or relating to electromagnetically-operated reciprocating pumps
IPC: H02K33/10
Filed: 1947-02-05
Abstract: 642,111. Electromagnetically-actuated pumps. BENDIX AVIATION CORPORATION. Feb. 5, 1947, No. 3490. Convention date, Feb. 11, 1946. [Class 102(i)] [Also in Groups XXXV and XXXVII] An electromagnetically-actuated pump comprises a piston 29 of magnetic material sliding in a cylinder 7 of non-magnetic material held in a casing 1 of magnetic material and surrounded by an electromagnetic coil 11 having pole pieces 8, 9. The piston 29 is pressed upwardly on its delivery stroke by a spring 33 and returned by energizing the electromagnetic coil. The piston is fitted with a valve 35 and a suction valve 17 and strainer 25 are provided. The current to the electromagnetic coil is controlled by contacts 53, 56, the contact 53 being stationary an the contact 56 being carried by a spring 57 fixed to a counterweight 65 at one end of a lever 59 pivoted at 61, the other end of the lever being connected to a permanent magnet 62. When the pump piston reaches a point 'towards the end of its stroke, it attracts the magnet 62 to close the contacts 53, 56 to energize the electromagnetic coil 11 to move the piston downwards and the magnet 62 is then attracted by the casing 1 to break the contacts 53, 56; the movement of the magnet 62 is limited by a strip 64 of non-magnetic material 64. The lever 59 may be modified by being spring-loaded in a direction to break the contact and the magnet being in the form of a cube attached to it. In a further modification, the magnet is carried by a blade spring anchored at one end and also has attached to it a blade spring carrying the movable contact.
Patent GB-1463462-A (GB)
Title: Compressed a'' hand tool and a vane motor therefor
IPC: F01C21/08
Filed: 1975-01-27
Abstract: 1463462 Rotary vane air motors ROBERT BOSCH GmbH 27 Jan 1975 [30 Jan 1974]  3499/75 Heading F1F The air motor of a hand held impact wrench comprises a rotor 14 with a cylindrical part 15  which surrounds a cylindrical stator 21 and a plurality of radially extending vanes are slidably mounted in slots in the stator and are urged outwardly by means of pins 27 and springs 29 located in non-intersecting bores 26 which extend between diametrically opposed slots. Air is supplied and discharged via ducts 40 and passages 41 at one end of the motor and the rotor 14 together with a part 33 in which the passages 41 are located and an endplate 30 rotate on bearings 13, 19 whose inner  races are on cylindrical extensions 11, 20 of the stator 21. In each bore 26, one end of a pin 27 abuts one vane and the associated spring 29 surrounds a smaller pin 28.
Patent GB-265530-A (GB)
Title: Improvements in meat slicing machines
IPC: B26D1/143
Filed: 1926-02-08
Abstract: 265,530. Eerste Nederlandsche Rijwiel-en Machinefabriek voorheen H. Burgers. Feb. 3, 1926, [Convention date]. Cutting slices in succession.-In a slicing- machine having a reciprocating table, a rotary knife and chain gear driving the knife, the holder comprises a trapezoidal pillar having a part U-shaped in cross section, and a part cast in one piece therewith, triangular in section, which latter part serves as a slice deflector and a guard for the knife driving chain. The holder is hollow and contains the knife driving gear. The axis of the lower sprocket of the knife driving gear is preferably not directly below the knife axle, thus effecting a saving of space and making it possible to use an entirely flat front guard plate. One of the courses, preferably the pulling course of the chain may be vertical. As shown in Figs. 3, 6, the frame 1 is integral with a depending portion 3 and a slice plate 4 supported by flanges 5, the sprocket 20 and shaft 19 being within the frame and fully enclosed. The guides 7 of the table 6 are supported by brackets 8 cast on the frame 1, the brackets being connected by a web 9 which forms the front wall of the frame, divides the slice plate from the remainder of the machine and prevents scraps of meat from accumulating below the table 6 and inside the frame. The knife support 11 is secured by bolts to the end of the frame remote from the flywheel. The bush 13 for the knife axle is held by plummer blocks 15 and bolts, and the sprocket 18 is preferably placed close to the knife. The trapezoidal support is shown in section in Fig. 5. It consists of a U-shaped part 23, 24, Fig. 6, and a triangular part 25, 26 integral therewith. The plate 25, as shown, has a flat vertical part joined to a end part 26, bent over towards the knife, but it may be in the same place as the part 26 which latter is so shaped that it merges gradually into the rib 9. A gap 27 is provided for the knife edge and the parts 25, 26 rest on the plate 4. The support has a flange 28, Fig. 5, and a low back wall, 29, Fig. 3, to prevent scraps from falling into the support. A glass or earthenware cover may be placed on the plate 4.
Patent GB-936326-A (GB)
Title: Floor tile
Inventor: BRAKELEY PAUL WINTER
IPC: E04F15/10
Filed: 1962-02-01
Abstract: 936,326. Marbled thermoplastic floor covering material. JOHNS-MANVILLE CORPORATION. Feb. 1, 1962, No. 3786/62. Class 87(2). Marbled thermoplastic surface covering material is produced by cutting grooves in a blanket of thermoplastic material, dropping coloured powder into the grooves and calendering. The blanket is formed by dropping thermoplastic material from a hopper 13 between the hot rolls 2, 3. The front roll 3 is at a temperature sufficiently different from roll 2 to cause the blanket of material formed to adhere to roll 3. Enough material falls on the rolls to form a folding bank of reserve 17 which is no more than 4 inches high. Grooves are cut in the blanket by knives 5 which can be retracted from the roll 3. The grooves cut extend through the blanket, whose width can be increased by altering the distance 4, to the surface of the roll. Into these grooves powder 9 from a hopper 7 falls through holes 8. The blanket and powder are then milled for a sufficient time to heat the powder to a plastic condition to slightly distort the parallel lines formed. The lines can also be distorted by milling at higher speeds than usual. The blanket is then removed from the mill, placed on a conveyer 19, folded once transversely, turned 90 degrees and calendered.
Patent GB-179287-A (GB)
Title: Improved process for separating solids by crystallization from solvents
IPC: B01D9/00
Filed: 1921-02-01
Abstract: A cyclic process for the separation of two salts (A.B), such as the nitrates of sodium and potassium, from solutions containing both, consists in bringing the solution to such conditions of concentration and temperature that the salt A only crystallizes on cooling, effecting the cooling, separating the salt A, removing solvent to cause the salt B to crystallize on cooling, cooling, separating the salt B, and adding solvent or a dilute solution of one or both salts to restore conditions under which either salt only tends to crystallize on cooling.
Patent GB-575550-A (GB)
Title: Improvements in and relating to centrifugal governors
IPC: G05D13/08
Filed: 1944-03-01
Abstract: 575,550. Centrifugal governors. ASSOCIATED EQUIPMENT CO., Ltd., and BURTON, D. G. March 1, 1944, No. 3859. [Class 57] The centrifugal weights of a governor, which move between rotary plates or cones f, g converging together outwards, are constituted by roller or ball bearings, the inner and outer races of which each contact with one of the plates or cones ; the cone g is of two different angles corresponding with high and low speeds. It may be loaded by two springs m, n; the first spring operates alone at low speeds ; at somewhat higher speeds there is an interval with no governing, solely.under the operator's control and the second (heavier) spring operates at speeds above this interval in conjunction with the steeper of the two angles of the cone. The weights are positively driven through dog-teeth formed by slots in the disc f ; stubs on the inner race roll on the lands between these slots. In another form, the weights are driven frictionally from the cone, and the disc is provided with grooves and lands and may have a drive, in addition to the friction drive, through the springs, which are then connected to a rotating part. Specification 467,550 is referred to.
Patent GB-731100-A (GB)
Title: Valve construction
IPC: F16K5/04
Filed: 1953-02-11
Abstract: 731,100. Valves., GROVE REGULATOR CO. Feb. 11, 1953 [Feb. 11, 1952], No. 3871/53. Class 135. A valve having a straight-through, fluid flow passage controlled by, e.g., a slide or a plug, is provided with resilient 0-rings for effecting a seal between the opposite sides of the slide or plug and the body of the valve, the arrangement being such that the seal is made only on the downstream side of the valve. Figs. 1, 2B show a gate valve having a slide 22 actuated by a hand wheel 43 secured to a sleeve 42 in screwthreaded engagement with the valve stem 24. The sleeve is supported by ball-bearings in a bonnet 26 retained in the body of the valve by a split-ring 29 engaged in a groove 31, the bonnet being pulled up tight against the ring by screws 35 in lugs 34. A fluid-tight seal is effected between the body and the slide by 0-rings 52 disposed in recesses formed between members 56 and rings 57 of, e.g., stainless steel loosely fitting into the members, the surfaces 67, 69, Fig. 2B, of the members being pressed against the slide 22 by circumferentially-spaced springs 64. In the closed position of the valve, shown in Fig. 2B, and with fluid under pressure entering the left side of the valve, the 0-ring on the left or upstream side of the valve is displaced from contact with the side, while that on the right or downstream side is pressed against the slide by the pressure of the fluid leaking past the surfaces 67, 69 into the valve space 19 which communicates through ducts 78 with the 0-ring recess. Figs. 3, 4 show a plug valve having O-rings 107 disposed in grooves formed between rings 111 loosely fitting into recesses in the valve body and liners 109 located between the valve body and the plug 94. Pressure liquid entering the left side of the valve displaces the left 0-ring from contact with the plug, thus permitting the liquid to leak past the liners 109 to the ring grooves on the right side and press the 0-ring into liquid-tight contact with the plug. Pressure built up by liquid collecting in the bore 106 of the plug may be automatically relieved by a spring-loaded valve 121. Specification 662,448 is referred to.
Patent GB-875667-A (GB)
Title: Improvements in bases for electric discharge lamps
IPC: H01J5/54
Filed: 1958-02-06
Abstract: 875,667. Lamp caps. GENERAL ELECTRIC CO. Feb. 6, 1958 [March 1, 1957], No. 3913/58. Class 38 (1). A discharge lamp 1 (Fig. 2) is provided with a base 3 comprising an annular aluminium shell and a plastic insulating disc 5 having a boss 7 with a central hole 8 in which are secured two sheetmetal contacts of the form shown in Fig. 6. The outer ends 27 and tabs 29 of the contacts fit into recesses in the face of boss 7 while side pieces 25, 26 are flared out to engage the sloping face of the semiconical recesses 32 in the inner face of disc 5 so that the contacts are held in place. Alternatively, the contacts may be moulded in the disc 5. The wall of aperture 8 behind the contacts contain wiring passages leading from the semiconical recesses. The lead-in wires of the discharge lamp extend through these passages and through holes in eyelets 28 on the contacts to which they are soldered or are welded by discharging a condenser through a welding electrode contacting the eyelet and the associated lead-in wire. The top 41 of the eyelet is made thin so as to have a low thermal mass.
Patent GB-877390-A (GB)
Title: Top-blowing a metallic melt
IPC: C21C5/46
Filed: 1960-02-04
Abstract: 877,390. Oxygen burners. ARBED, ACIERIES REUNIES DE BURBACH-EICH DUDELANGE S.A. Feb. 4, 1960 [Feb. 20, 1959], No. 3969/60. Class 51 (1). In an oxygen burner for steel making, an outer fluidcooled jacket 9 and an inner tube 7 form two coaxial passages 15, 8. The inner passage 8, through which highpressure oxygen or oxidizing gas is blown, terminates in a Venturi nozzle 14, while the outer passage 15 terminates in a porous plug 16, which allows the passage of low pressure gas but prevents material from the melt blocking the passage 15. The porous plug 16 may have small bore holes through it, or may be replaced by a spring-loaded non-porous stopper. In another embodiment, Fig. 3, the outlet of the nozzle 14 is flared so that the high-pressure gas issuing from it keeps the outer passage clear of obstrucing matter. The inner tube 7 may be flared at its nozzle end so that by moving the tube 7 within the jacket 9, the outer passage may be closed to prevent its blockage, or opened to allow gas to issue. The outer passage 15 may be closed at its end, Fig. 4, the gas issuing from it through small bores 27 in the nozzle part of the outer jacket 9. Specification 845,393 is referred to.
Patent GB-524770-A (GB)
Title: An elastic tensioning device for retaining trousers in position during wear
IPC: A41F3/02
Filed: 1939-02-07
Abstract: 524,770. Devices for supporting trousers at the waistline. BAROSI, C. Feb. 7, 1939, No. 3990. Convention date, Feb. 8, 1938. [Class 141] A device for supporting trousers at the waistline comprises one or more metallic springs detachably secured to a belt or to the trousers waistband. In the form shown in Fig. 1, the device consists of two ring-shaped metallic springs 1 adjustably connected together, and having their other ends detachably secured to the trouser waistband. The adjustable connecting device comprises a plate 11 secured to the trousers by bent-over teeth or by stitching, and having attached thereto a guide plate 9 on which are mounted two slotted straps 13 which are secured together in an adjusted position by a screw and nut, and are each provided with an eyelet 14 through which a spring 1 is passed. The other end of each spring is provided with a clamp 2 having an opening 4 which receives a shank of a resilient fork 5 hinged to a plate 6 which is secured to the trousers by bent-over teeth. In a modification, Fig. 4, the device for connecting the springs together consists of a base plate 18 on which are slidably mounted two straps 20 adjustably connected together by slots and hooks 21, 22, and each having an eye 23 through which a spring 1 is passed, the other end of each spring being provided with a clamp 24 having a pin 25 hingedly connected to a plate 26 which is secured to a belt 27 or to a plate which is secured to the waistband by bent-over teeth. In another modification, Fig. 8, the device consists of a single spring 29 which is passed through a central loop 31 secured to the waistband by bent-over teeth, each end of the spring being passed through holes in a ball 30 which is attached to a T-shaped member 34 adapted to be engaged selectively with a pair of hooks 35 provided on a plate 37 which is secured to the waistband or belt by stitching or bent-over teeth.
Patent GB-650331-A (GB)
Title: Portable slideway grinder
IPC: B24B7/14
Filed: 1948-02-11
Abstract: 650,331. Grinders for slideways. SICHEL, L. Feb. 11, 1948, No. 4080. Convention date, Feb. 14, 1947. [Class 60] A portable grinding-machine for finishing slideways of machine beds has three or more grinding heads located close to each of three or more rollers that rest on the slideways to be ground. The rollers 17, 18 and 19 are fitted adjustably for height, angle and position in grooves 32 under a base 5 which is traversed up and down the slideways by a reversible motor 40 having a drum 42 round which is wound a cable 41 attached to removable brackets 43 at the ends of the bed. A frame 13 carrying grinding heads 20, 21 and 22, also adjusted for height, angle and position, is tiltably mounted on the base by means of a shaft 10 engaging a centre block 9 on a shaft 8 journalled in brackets 6 on 'the base, the shafts being rotatable by micrometer screws ball-jointed to levers 15 on the shafts. The block 9 may be replaced by a ball-bearing 50a, Fig. 15, upon which are superimposed segments 50, 51 having tongue and slot connections 52, 53. For finishing the portion of the flat slideway 4 not finished by the head 21, the head 22 over the slideway 3 may be adjusted along the side of the frame 13 until over the slideway 4, or the end of the frame may be arcuate so that the head 21 may be adjusted round to the required position; alternatively, the roller 19 may have a curved bracket that engages the base 5 inwardly of the slideway 4 and allows the motor and shaft of grinding head 21 to be raised and moved along the top of the frame over the roller or, again, two heads may be mounted on either side of the roller 19. The frame may also be rectangular so that it is more easily machined and so that the heads are more easily interchangeable. The rollers corresponding to the grinding heads may be duplicated, one on each side of the head.
Patent GB-829263-A (GB)
Title: Method of making printed circuits
IPC: H05K3/24
Filed: 1958-02-07
Abstract: In a method of making a printed circuit (see Group XXXVI), the printed conductors are formed by coating an insulating board (e.g. an epoxy laminate) with nickel by an electroless process, and subsequently depositing a conductor on to the nickel.  In one embodiment, the surfaces of the board are first cleaned by sand blasting and a negative pattern of resist material is applied. The board is then immersed successively in aqueous stannous chloride and palladium chloride solutions, and then in an electroless neckel plating bath which deposits a thin film of nickel on the surface not covered by the resist, and also on the walls of holes through the board.  The resist material is then removed and a layer of copper electro-deposited on to the remaining exposed portions of the nickel. The complete board is then immersed in a molten tin-lead solder bath. In an alternative embodiment, nickel is deposited on the walls of holes in a copper-clad board as a separate process, the faces of the board being masked by a resist.  After removing the resist, the whole board is electroplated with copper over which a negative pattern of resist is printed leaving exposed only the areas which are to form the printed circuit.  Tin-lead is plated over all the exposed surfaces, and after removing the resist, the unwanted copper is removed by etching.  Specifications 712,687, 749,824 and 761,556 are referred to.
Patent GB-511196-A (GB)
Title: Improvements in gyroscopic turn indicators for aircraft
Filed: 1938-02-09
Abstract: 511,196. Gyroscopic apparatus. SMITH & SONS (MOTOR ACCESSORIES), Ltd., S., and MOSS, E. B. Feb. 9, 1938, No. 4106. [Class 97 (iii)] A leaf spring 25 for centralizing the precession frame 13 of a gyroscopic turn indicator is arranged at one side of the axis of rotation 14-14 of the frame 13 and is connected by a link 21 to a point 22 on the frame at the opposite side of the arms 14-14 so that the link 21 operates in compression. As shown, the spring 25 is parallel to the axis 14-14 and has at the free end a recessed jewel bearing 23 for the link 21. The restoring force may be varied by adjusting , the position of a slide 27.
Patent GB-728320-A (GB)
Title: Improvements relating to gas-burning lighters
IPC: F23Q2/16
Filed: 1953-02-13
Abstract: 728,320. Gas-fuedled cigarette lighters. ETABLISSEMENT J. BORN. Feb. 13, 1953 [Feb. 18, 1952], No. 4136/53. Class 75 (3). In a gas-burner lighter having a container for liquefied-gas fuel, the burner includes a deformable resilient or flexible diaphragm formed with a hole through which the gas passes on its way to the outlet of the burner and means 'utilizing the resilience or deformability of the material of the diaphragm to vary the section of the hole in order to regulate the gas discharge from the burner. A diaphragm 11 of rubber or synthetic resin has a cross-shaped aperture 14 in the flow path between a container 1 for liquefied gaseous fuel and a burner nozzle 10, and the edge of the aperture 14 may be deformed by screwing a housing 9 carrying the nozzle 10 on to a sleeve 2 on the upper edge of which the diaphragm 11 is mounted. The sleeve 2 is secured at its lower end to the container 1. When a snuffer cap 13 is lifted from the nozzle 10 fuel flows from the container 1 through an aperture 4 in a lower end plate of the sleeve 2, a filter layer 5, a bore 8 in an internal sleeve 7 within the sleeve 2, the aperture 14, and the nozzle 10. The upper inner surface of the housing 3 is domed sufficiently to permit the required deformation of the diaphragm 11.