baber/WOPTO huggingface dataset:
Patent GB-1025447-A (GB)
Title: Electrical switches and applications thereof
IPC: H01H1/28
Filed: 1963-02-21
Abstract: 1,025,447. Stencil switches; momentarycontact switches. WESTERN ELECTRIC CO. Inc. Feb. 21, 1963 [Feb. 26, 1962], No. 6983/63. Heading H2B. In an electric switch, sensing members 24, comprising a shaft 28 and head 26 detect the presence of a coding perforation in a web 14. Each head 26 extends through an aperture 18 in a separator 10 and makes rolling contact with the web 12 which is moved through a guide channel 11 in the separator 10, the head moving into a perforation in the web when one passes it. The sensing members are kept in engagement with the web 12 by contact members 46, 48 and 50, the contact member 46 being stationary and engaging a datum bar 36 which holds the sensing members 24 in the apertures 18, the contact member 48 engaging the shaft 28 of the sensing member 24. The contact member 50 is biased towards the bar 36 but is normally held off by the contact 48, but, when the sensing member moves inward, owing to the presence of a perforation, the contact 50 is permitted to move forward into engagement with stationary contact 46. Following this engagement contact 48 continues to move slightly, out of engagement with contact 50. A comb 22 keeps the ends of the contact members in correct relationship and the datum bar 36 may be additionally supported by a further sensing member 58, bearing on the web 12 but not in register with any of the perforations. In another embodiment, the sensing member is in two parts (see Fig. 4, not shown), the first part carrying the stationary contact and being in alignment with the spaces between the perforations and a second part, aligned with the rows of perforations, supporting the movable contact member.
Patent GB-630284-A (GB)
Title: Synthesis of penicillin
IPC: C07D499/06
Filed: 1947-03-13
Abstract: Substances having penicillin activity are prepared by reacting d-penicillamine or a hydrohalide thereof with a 4-alkoxymethylene-5-oxazaolone substituted in the 2-position with a monovalent saturated or unsaturated hydrocarbon radical, in the presence of an organic basic liquid condensing agent.  When the substituent in the 2-position is a benzyl group the product is p penicillin G and some penicillenic acid G is also formed. Conveniently d-penicillamine is condensed with a 2-benzyl-4-alkoxymethylene-5-oxazolone in the presence of pyridine or acetamide by heating for a period dependent on the temperature, two to three hours being required at 75 DEG  C. and about fifteen minutes at 110 DEG  C.  Catalytic amounts of ascaridol or benzoyl peroxide may be present.  When condensation is complete the solvent or condensing agent is removed, the reaction product is fractionated by treatment with solvents such as ethyl acetate or ether and if desired the activity may be concentrated by treating with an absorbent material such as alumina and subsequent elution. In examples: (1) and (4) d-penicillamine hydrochloride is reacted with 2-benzyl-4-methoxymethylene-5-oxazolone in pyridine and in (1) the product is recrystallized from benzene; (2) a product prepared as in (1) is adsorbed on alumina and recovered by elution with ethyl acetate, extracted by a phosphate buffer and finally freeze-dried; (3) d-penicillamine is condensed with 2-benzyl-4-methoxymethylene-5-oxazolone in pyridine alone and in the presence of ascaridol and benzoyl peroxide; (5) d-penicillamine is condensed with 2-benzyl-4-ethoxymethylene-5-oxazolone in pyridine.  2 - Benzyl - 4 - alkoxy - methylene - 5 - oxazolones are prepared by reacting the methyl ester of a -formyl-a -phenacetamido-acetic acid with anhydrous hydrogen chloride in alcohol to form the methyl ester of a -phenylacetamido-b  - b  - dialkoxypropionic acid, treating with aqueous alkali and acidifying to form the free acid and reacting with a mild condensing agent to form the oxazolone.
Patent GB-671827-A (GB)
Title: Device for use in securing card clothing on cylinders
IPC: D01G15/84
Filed: 1949-03-15
Abstract: 671,827. Securing card clothing on carding cylinders. ZBROJOVKA BRNO, NARODNI PODNIK. March 15, 1949, No. 7082/49. Classes 120(i) and 120(iii) A device for tensioning card clothing about cylinders prior to securing the clothing comprises jaws carrying teeth for engaging and drawing together the free ends of the clothing, and means for measuring the tension applied. The jaws are carried by pivoted arms 1, 2, one arm providing an anvil 4 to facilitate driving in the teeth 5. The device is tightened by a handwheel 17 and rod 14. the rod 14 carrying a plate 11 bearing against a spring 12, compression of the spring being recorded by a pointer 22 acted on by the plate 11. The clothing ends 6, 6' are secured by strips 31 attached to the cylinder 30 by screws.
Patent GB-589276-A (GB)
Title: Improved apparatus for the counting and measurement of current impulses of short duration
IPC: H03K21/02
Filed: 1945-03-21
Abstract: 589,276. Thermal ammeters and voltmeters. LANDIS & GYR SOC. ANON. March 21, 1945, No. 7154. Convention date, April 5, 1944. Addition to 566,645. [Class 37] A meter for counting and measuring shortcurrent impulses as described in the parent Specification includes a vessel the interior of which is closed by a flat diaphragm and is connected with the exterior through a channel offering great resistance to the flow of fluid therethrough. A cylindrical vessel 1, Fig. 1, is closed at the bottom by an insulating disc 2 through which pass terminals 3, 4 connected to a heating wire 7. This is stretched on two small insulating frames 8, of which only one is shown. The vessel 1 is provided with a flange 10 to which are attached by screws 13 clamping rings 11, 12 having between them a diaphragm 14 of thin oiled silk. This carries a pressure transmission plate 15 with an upwardly bent outer edge, which is attached to the diaphragm 14 by means of a plate 16 and discs 17, 18. Attached to the plate 16 by screws 19 is a plate 20 carrying a plunger 21. The lower face of the plate 20 is formed with a channel 22 connected with the interior and exterior of the vessel 1 through holes 23, 24. Between the plates 16, 20 is a packing disc 25 of thin oiled cloth. The plunger 21 is carried in a guide 26 which is held in a cover-plate 28. The channel 22 may, as shown in Fig. 2, consist of concentric circles which are interrupted by a sector and are connected by radial channels so as to produce a continuous channel. Alternatively the channel may be spiral or helical. The wire 7 is heated by the impulse to be measured, thereby heating the air inside the vessel 1 and causing it to expand so that the diaphragm 14 moves the plunger 21 upwards. This movement is transmitted to a metering mechanism as described in the parent Specification. Any undesired stressing of the diaphragm due to variations of temperature or pressure of the surrounding air, which take place comparatively slowly, are compensated by the channel 22 which permits a slow equalisation of the internal and external pressure. The channel 22 may alternatively be sitauted in the wall of the vessel 1 or on the lower disc 2.
Patent GB-199335-A (GB)
Title: Knitting needle shield
IPC: D04B3/00
Filed: 1923-03-13
Abstract: 199,335. Lawrence, F. R., and Lawrence, R. W. March 13, 1923. Knitting - appliances, hand. - The points of needles H carrying work in progress are shielded bv insertion into telescopic cylindrical cases a, c of metal, celluloid &c., connected together bv two thin wires or chains c which wind up on a spring roller b mounted in the end of the case a. Fig. 3 shows the device collapsed.
Patent GB-1339238-A (GB)
Title: Cigarette filter
IPC: A24D3/04
Filed: 1972-02-16
Abstract: 1339238 Filter cigarette BRITISH-AMERICAN TOBACCO CO Ltd 16 Feb 1972 [3 March 1971] 7198/72 Heading A2C A ventilated filter cigarette 10 comprises a tobacco section 11 united to a filter section 12 by a tipping paper 16 having openings 17 to provide a filter ventilation area and, interposed between the filter ventilation area and the tobacco section, a plug 13 provided with openings 18; the size and number of openings being such that as they become progressively clogged during smoking they increase the draw resistance through the tobacco section 11 and thus increase the relative proportion of air drawn through the ventilation openings 17 compared with the smoke drawn through the plug 13.
Patent GB-434723-A (GB)
Title: Improvements in or relating to internal combustion liquid piston pumps operating on the two-stroke cycle
IPC: F04F1/16
Filed: 1934-03-07
Abstract: 434,723. Raising and forcing water. CHRISTIE, S. P., 12A, Ennismore Gardens, South Kensington, London. March 7, 1934, No. 7211. [Class 102 (ii)] Direct explosion apparatus.-In a twostroke-cycle internalcombustion liquidpiston pump wherein the explosion gases act upon the surface of an oscillating column of liquid, the fuel or mixture control valve 5 is located adjacent the top of the chamber 1 remote from the mouth of the longitudinal dependent supply tube 2, which mouth is covered and sealed by the liquid piston on the compression stroke, and the valve is clear of the liquid piston. An ignition chamber 9 which is swept by a portion of the incoming charge which may be of different composition from the main charge, is arranged around the end of the chamber 1, is provided with sparking-plugs 13, and ducts 10, 11 connected to the duct 2 and the chamber 1. The main valve 5 and an auxiliary supply valve 12 comprise oscillating discs and are operated as described in Specification 338,165, [Class 102 (ii)] ; or the charge may be supplied as described in Specification 241,635, [Class 102 (ii)]. Equalizing-valves 7 operated by the exhaust valves 3 connect the tube 2 and the main combustion chamber, and are closed or opened when the pressure is not appreciably higher or is appreciably higher respectively than atmospheric. The valves may be operated by piston apparatus or by pneumatic or electric means. The duct 2 has perforations 4 adjacent the open end and is surrounded by a scavenging-cylinder 6. After the explosion, the return of the liquid closes the valve 3 and opens valves 7 and compresses the charge. A modification is described provided with a number of supply ducts each with its own ignition chamber or a single chamber may be provided for all the ducts. The bottom of the ducts have louvres. A common scavenging-duct divided into sectors surrounds the ducts 2. Oscillating-sleeve equalizing-valves may be used. The pump may be used as a prime mover for the propulsion of ships, or the liquid piston may merely oscillate and be employed as the piston of a compressor. According to the Provisional Specification, the louvres or slots may be replaced by valves successively opened as described in Specification 337,443, [Class 102 (ii)].
Patent GB-350436-A (GB)
Title: Improvements in toasters
IPC: A47J37/08
Filed: 1930-03-05
Abstract: 350,436. Toasters. NATIONAL APPLIANCE CO., 205, West Wacker Drive, Chicago, U.S.A. March 5, 1930, No. 7242. Convention date, March 5, 1929. [Class 28 (i).] A toaster for buns, biscuits and the like comprises a blade-like toasting-element 16 which is inserted between parts of the bun without completely severing the bun and members 23 for holding the parts of the bun against the element. One extremity 17 of the element is pointed so that the bun may be applied endwise and the other end is supported by an abutment 19 fixed on a base 8 and containing the coils of an electric heating element. The members 23 comprise metal strips attached to the base and extending on opposite sides of the blade 16. In a modification a vertical toasting blade 25, Fig. 4, having an upper pointed extremity is supported by a base 26, and has a shield 27 which extends around three sides of the blade and has flexible and yielding free edges 28 for pressing the parts of the bun against the blade.
Patent GB-145151-A (GB)
Title: An extension piece for fixing to the blades of worn shovels
IPC: A01B1/02
Filed: 1919-03-25
Abstract: 145,151. Coomber, A. J. March 25, 1919. Shovels.-An extension piece for the blades of worn shovels is formed from a blank of sheet metal and is secured by means of clips forming part of it. Fig. 1 shows the shape of the blank, which is formed with projecting parts A and struck-up tongues B. The ends of the blank are bent up at right-angles, and the projections A are bent so as to clip over the sides of the shovel The tongues B clip over the end of the shovel blade.
Patent GB-471074-A (GB)
Title: Improvements in liquid fuel supply systems particularly for internal combustion engines
IPC: F02M59/14
Filed: 1936-03-12
Abstract: 471,074. Pressure-regulating valves. SELF-PRIMING PUMP & ENGINEERING CO., Ltd., and DAWSON, A. L. B. March 12, 1936, No. 7460. [Class 135] [Also in Group XXVII] A diaphragm - actuated pressure - regulating valve, particularly for regulating the fue supply to internal combustion engines comprises a lift valve e controlling the fue supplied at b by a pump to an outlet c the diaphragm being loaded by a spring k arranged in a sleeve l, the end of which bears against the diaphragm and which is surrounded by an adjusting-screw m carried in the casing a<1> of the apparatus. The lift valve e is secured to a spindle slidably mounted in a removable seat h screwed in position.
Patent GB-669569-A (GB)
Title: Improvements in or relating to thermal storage steam raisers
Inventor: HARVEY RICHARD
IPC: F22B1/04
Filed: 1947-10-21
Abstract: 669,569. Sterilizers. GENERAL ELECTRIC CO., Ltd. Oct. 14, 1948 [Oct. 21, 1947], No. 7484/49. Divided out of 669,637. Class 81 (i). [Also in Groups XI and XIII] A thermal storage steam raiser 2 more particularly for use with a sterilizing cabinet as described in Specification 683,797 and constructed as described in Specification 669,537, [Group 'XIII], is combined with a water-feed tank 6 arranged to supply water at some required rate for conversion into steam. A three-position plug cock 7 controls the supply of water from the tank to a water-feed pipe 8 leading into the block. One orifice in the cock provides water for conversion into 20 1b. of steam in 10 mins., and the second orifice restricts the water flow to provide a steaming jet of 18 1b. per hour. A. steam pipe 9 leads from the block to a valve 10 controlling the inlet to the cabinet 1. The feed pipe is vented by a pipe 13. The tank is filled to a mark which indicates the quantity of water necessary to produce the required amount of steam. Specification 616,959 also is referred to.
Patent GB-553778-A (GB)
Title: Improvements in hydraulic pressure transmission devices
IPC: F15B7/00
Filed: 1942-06-03
Abstract: 553,778. Hydraulic control systems; fluidpressure brakes. ABBEY, A. (Bliss Co., E. W.). June 3, 1942, No. 7564. [Class 69 (ii)] [Also in Group XXXIV] A fluid-pressure transmission device for operating clutches, brakes &c. is constructed of one or more cylinders 27 connected by pipes 28 to a pipe for transmitting the pressure fluid and fitted with pistons 18 operated by toggle links 15 connected to an operating rack 12 driven by a pinion 6 from an electric motor. The links 15 are pivoted to a fork 14 which, as the rack is moved to full line position from its inoperative position shown in dotted lines, engages a cushion plate 24 of a spring-raised dash-pot device 26. The toggles are thus prevented from moving far beyond the dead centre position, and are maintained in this pressure-applying position by the pressure of the fluid in the transmitting system. The rack is held in this position by a recess 33 engaged by a spring-pressed ball 32 which prevents chattering. Pressure is maintained in this system by a spring- pressed plunger 40 in a casing 37 connected to the transmitting system, and the pressure is adjustable by means of a screw 45. A pipe 50 returns to the main casing 10 any fluid which leaks past the piston 40. Any excess fluid which enters the transmitting system can return to the casing 10 via a pipe 60 leading to a hollow-member 64 connected to the casing and fitted with a check valve 68 which is opened by a rod 65 carried by the rack 12 and engaging adjustable spacing-members 70 on the rack. The valve 68 may cause lubricating oil to pass over the rack. When the pistons 18 are withdrawn to release the pressure, fluid can pass from the casing 10 to the pressure pipe 28 via a pipe 55 and non-return valve 57.
Patent GB-912901-A (GB)
Title: Matting of photographic layers
IPC: B32B27/00
Filed: 1959-03-04
Abstract: 912,901. Photographic materials. AGFA A.G. March 4, 1959 [March 5, 1958], No. 7564/59. Class 98 (2). A photographic silver halide emulsion layer or a water-permeable protective layer contains finely divided particles of a thermoplastic polycarbonate having a molecular weight of at least 10,000 as a matting agent. In addition to the polycarbonate the layers may contain paraffin oil and a polyvinyl ether. The polycarbonates may be those prepared according to any of Specifications 772,627, 808,485, 808,486, 808,487, 808,488, 808,489, 808,735 and 894,490.
Patent GB-347812-A (GB)
Title: Improvements in valves
IPC: B60H1/08
Filed: 1930-03-08
Abstract: 347,812. Heating vehicles; valves. BROTHERTON, R., BROTHERTON, J., BROTHERTON, J., and BROTHERTON, F., 6A, Alfred Street, Blackpool. March 8, 1930, No. 7593. [Class 64 (ii).] A valve placed in the conduit from the water jacket to the cooling radiator of a motorvehicle and adapted to divert the warm water through heating devices in the interior of the vehicle comprises a cylindrical casing a having ports a3, a<4> at one end communicating with the flow and return pipes d, d<1> of the heating devices, and passages a<1>, a<2> communicating respectively with the engine jacket and the cooling radiator. A rotary valve member has ports all, a<12> in one end disc a<9> adapted to register with the casing ports a3, a4 and a wing member a<5> provided with an aperture a<13> permitting partial flow to the cooling radiator when the heating devices are in circuit.
Patent GB-873807-A (GB)
Title: Improvements in electro-magnetic induction pumps
IPC: H02K44/02
Filed: 1959-03-04
Abstract: 873,807. Electromagnetic induction pumps. ELECTRICITE DE FRANCE. March 4, 1959 [April 11, 1958], No. 7600/59. Class 35. The conveying metal tube 1, Fig. 2, of an electromagnetic induction pump for circulating liquid metal e.g. alkali metal such as sodium has an elongated transverse cross-section and consists of inner and outer casings 2, 3 mutually separated by a separator 4 fitted in the clearance between the casings and constructed to prevent at least partly eddy current flow between the casings. The inner casing 2 is made as thin as possible, the outer casing 3 provides the mechanical strength, the separator is a sheath of wire gauze the surface of which may be enamelled, and all three are of stainless steel. The short sides of the tube are lined with respective short-circuiting bars 5, 6 which may be of copper and act to reduce the resistance opposing the eddy currents induced in the liquid. In Fig. 1 the tube A has liquid metal input and output nozzles B and is fitted between two magnetic plates C energized by a winding D to whose terminals P, Q, R three-phase current is fed. Specification 699,925 is referred to.
Patent GB-759765-A (GB)
Title: Improvements in or relating to a method of removing carbon from a mixture of barium oxide and carbon
IPC: C01F11/02
Filed: 1953-03-19
Abstract: Carbon is removed from a mixture of carbon and barium oxide by burning it out in a stream of gas containing less than 20 per cent by volume of oxygen.  It is preferred to use less than 15 per cent, e.g. less than 5-10 per cent by volume of oxygen, the remainder of the gas being nitrogen, helium or other gas which will not react with barium oxide.  Suitable temperatures are those at which the carbon reacts with the oxygen preferably to form carbon monoxide, e.g. 500 DEG -1200 DEG C.  The starting material may be produced by the process of Specification 759,766, e.g. by establishing a fluidized bed containing at least 50 per cent, preferably in excess of 90 per cent of barium oxide, barium carbonate and carbon being added thereto whilst withdrawing barium oxide particles.  The latter may be transferred to another fluidized bed maintained by a hot stream of nitrogen containing a small amount of oxygen, or may be treated with said gases in e.g. a shaft furnace or rotary kiln.  In the example 1 1/2 gms. of barium carbonate mixed with 7 1/2 per cent of its own weight of lampblack was placed in a refractory tube and heated at 1000 DEG C whilst passing nitrogen through the mixture for 15 mins. The product, containing about 1 1/2 per cent carbon was then heated with a mixture of nitrogen and air at 1000 DEG C, whereby 70 per cent of the carbon was removed without the formation of carbonate.
Patent GB-493021-A (GB)
Title: Improvements in or relating to vibratory electric motors
IPC: H02K33/16
Filed: 1938-03-11
Abstract: 493,021. Reciprocating motors. NAYLOR, C. H. March 11, 1938, No. 7641. [Class 35] The movable element of a reciprocating electric motor comprise a pair of spaced armatures F, G, interconnected as by saddlepieces J and rods H to move together, co-operating with two pairs of polepieces A1, A2 and B1, B2, the polepieces of each pair forming common terminations of alternating-current excited circuits A, B and permanent magnets, or direct-current excited circuits L so that constant polarity varying from zero to maximum is maintained in the polepieces and opposing forces acting on the armatures are eliminated. The polepieces and armatures are laminated and insulation is provided at P, Q to eliminate eddy currents. The magnetic circuits A, B may be separated and have separate coils. Springs M limit the movement of the armatures.
Patent GB-1522712-A (GB)
Title: Length measuring instrument
IPC: E21F17/00
Filed: 1976-02-26
Abstract: 1522712 Measuring length BERGWERKSVERBAND GmbH 26 Feb 1976 [3 April 1975]  07686/76 Heading G1M A length-measuring instrument to be fixed at the face support in a mine working has a cable 51 which is unwound from a drum 18, fed around a measuring wheel 16 and out of the instrument, its free end being attached at a fixed datum. A brake 22, 23, 24 acts on the cable as it passes to and from the wheel 16, rotation of which is transmitted through gears 17 to counters 13, 14 which thus indicate the distance moved. The instrument has a protective casing (not shown) with a cable outlet and windows for viewing the counters, one of which may have a zero-setting device 15. Holes d, e provide an alternative position for fixing screws 26 so that the counters can be viewed through the side of the casing.
Patent GB-926543-A (GB)
Title: An improved fluid controlling tap
IPC: F16K11/076
Filed: 1961-03-03
Abstract: 926,543. Valves. RAINSFORD & LYNES Ltd., and R. K. LYNES. March 2, 1962 [March 3, 1961], No.. 7770/61. Class 135. A comprises a body 3 provided with an inlet passage 4, a plurality of separate outlet passages 5, 6, a plurality of jet nozzles 13 mounted one in each of the outlet passages, a cylindrical control plug 8 rotatably mounted in a chamber 7 and provided with an annular channel 11 in communication with the inlet passage, at least one port A extending between the channel and an end face of the plug for registration with an outlet passage, and an 0-ring 17 providing a fluid-tight seal between the presented faces of the body and plug about an outlet passage. In the preferred embodiment, the plug 8 is located in the body and urged downwardly by a bowed circlip 15 while a finger-piece 20 has a nose 24 for selective engagement with four sets of V-shaped notches 25 so that two ports in the plug may be brought alternately into registration with one of the outlets or be moved into positions in which neither or both are in registration. Rotation of the plug is limited by stop faces 22 on the finger-piece co-operating with a projection 23 on the body. The valve may control the gas supply to a heater and the nozzles 13 may be of the kind used in carburettors.