baber/WOPTO huggingface dataset:
Patent GB-334279-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04M3/60
Filed: 1929-06-04
Abstract: 334,279. Standard Telephones & Cables, Ltd., and, Wright, E. P. G. June 4, 1929. Semi - automatic exchange systems.-When an operator presses her key OK. a backstroke switch R hunts under control of PP for an idle selector of which the common " bye-pass " apparatus is idle also. PP energizes HH which causes the number of the trunk to be displayed at LP, connects the talking wires of the trunk to those of the bye-pass, circuit so that dialling may begin as soon as the operator plugs in, and marks the trunk to enable the bye-pass circuit to find it. On the restoration of OK, PP, HH hold; to ground in the bye-pass circuit. The. circuit may be altered as indicated by the dotted line and cross and by the provision of keys A, B to enable trunks in a particular direction to be selected. The key CK enables the operator to move the switch R from a faulty trunk. Specification 324,982 is referred to.
Patent GB-567777-A (GB)
Title: Improvements in or relating to the photo-polymerisation of ethenoid compounds
IPC: C08F2/48
Filed: 1942-12-01
Abstract: An organic compound possessing the group CH2 = CR- where R = H, halogen or hydrocarbon radical, linked with a carbon having each of its remaining valencies satisfied by oxygen or nitrogen, which may be polymerized by light, is mixed with a minor proportion of a polyketaldonyl compound, R(CO)xR1 where X = 2 or 3, preferably 2, and R and R1 = H or monovalent hydrocarbon radicals, and if desired, with another unsaturated compound possessing the group >C = C< which will photopolymerize therewith, e.g. diethyl fumarate, and subjected to polymerization by the action of light.  A peroxide catalyst may also be present.  Specified photopolymerizable compounds are the acids, esters, amides and nitriles of acrylic, and alpha-halogen and alpha-hydrocarbon substituted acrylic acids; preferred compounds are the lower alkyl acrylates and methacrylates. Specified polyketaldonyl compounds are diacetyl, pentanedione-2.3, octanedione-2.3, 1-phenylbutanedione-1.2, benzil, 2.2-dimethyl - 4 - phenylbutanedione - 3.4, glyoxal, phenylglyoxal, diphenyltriketone and cyclohexanedione.  The polymerization may be carried out in bulk, solution, or emulsion. Preferably, oxygen is excluded from the reacting vessel during polymerization.  Emulsifying and granulating agents which may be used include salts of sulphonic and sulphuric acid esters of long chain compounds, e.g. sodium acetoxydecane sulphate, any type of soluble starch, methylated starch, partially hydrolysed polyvinyl acetate, sodium salts of polymers or interpolymers of acrylic or methacrylic acids, polymethacrylamide, sodium starch glycollate and sodium cellulose glycollate.  Examples are given of the photopolymerization of methyl, isopropyl, n-butyl, beta-dimethylaminoethyl, and 2 - nitro - 2 - methylpropyl methacrylates, methyl alpha-chloroacrylate, acrylonitrile and N-methyl methacrylamide and of the photopolymerization of mixtures of methyl methacrylate with (1) vinyl chloride and (2) vinylidene chloride, and of vinyl chloride with (1) acrylonitrile and (2) methyl alphachloracrylate and of acrylonitrile with vinylidene chloride. Specification 567,776 and U.S.A. Specification 2,197,800 are referred to.
Patent GB-754778-A (GB)
Title: Improvements in drilling or grinding tools, more particularly for dental purposes
IPC: A61C3/02
Filed: 1954-06-10
Abstract: 754,778. Dental tools. KALTENBACH, A. and HOFFMEISTER, E. June 10, 1954 [July 3, 1953], No. 17115/54. Class 81(2). A dental-drilling or grinding tool for use with a handpiece comprises a bearing bush in which a thin spindle projecting from both ends is rotatable, the bearing bush being of a diameter corresponding to that of a normal tool shank used with the handpiece and being provided with means for preventing it rotating in the handpiece the spindle being provided at the rear end with a coupling part and having fixed to it at the opposite end a short shank of a cutting head of hard metal or having a diamond grinding surface. The grinding tool 1 has a short shank 2 secured, e.g. by brazing, to a spindle 3 which carries at its opposite end a coupling part 4 secured by a transverse pin 5. A bearing bush 6 fitted round the spindle 3 is provided with a lug 8 which when the whole tool is inserted in a handpiece engages with a recess in the handpiece to secure it against rotation relative to the latter. A lubrication hole 7 is provided. Preferably the lug 8 fits into the recess so that its forward edge is flush with the forward edge of the instrument. Reference has been directed by the Comptroller to Specification 703,518.
Patent GB-529923-A (GB)
Title: Improvements relating to pyrophoric lighters
IPC: F23Q2/40
Filed: 1939-06-12
Abstract: 529,923. Pyrophoric igniters. NATIONALE SOC. ANON. June 12, 1939, No. 17137. Convention date, July 9, 1938. [Class 75 (iii)] The lever or pivoted cover 10 carrying the wick-cap 13 of a pyrophoric lighter is opened by a spring 18 bearing on the two ends of a telescopic rod 16, 17 one end having a knife edge bearing against a member 20 arranged on a seating 19 on the lighter body 12 and the other end engaging hingedly an arm 15 on the cover 10. The telescopic rod moves through a dead-centre plane S during the opening and closing movement. In modifications one or both members of the telescopic rod are formed as tubes surrounding and forming a guide for the spring. 18. The lower tube may have a rounded or knife-edged end bearing against the body 12 or the wick tube. The Specification as open to inspection under Sect. 91 describes a construction in which instead of passing through a dead-centre plane S the telescopic rod always tends to lift the cover carrying the wick-cap. This subject-matter does not appear in the Specification as accepted.
Patent GB-369479-A (GB)
Title: Improvements relating to conjuring outfits
IPC: A63J21/00
Filed: 1931-06-12
Abstract: 369,479. Conjuring ; puzzles. JAY, E. and BRITISH GAMES, Ltd., 19, Clorkenwell Close, London. June 12, 1931, No. 17144. [Class 132 (iii).] A disappearing contents box for use with a conjuring outfit consists of an external case, Fig. 1, an " empty " drawer, Fig. 2, and an inner container, Fig. 3, the container being fitted with pads 6 that may be gripped at will by pressure applied to the case to retain the container within the case when the drawer is withdrawn. The container is fitted with removable partitions 4 and may be used to store conjuring apparatus 3 or other articles.
Patent GB-681086-A (GB)
Title: Improvements in or relating to pressure cookers
Inventor: JACOBSON FELIX CARL
IPC: A47J27/08
Filed: 1951-07-19
Abstract: 681,086. Pressure cookers. PLATERS & STAMPERS, Ltd. July 19, 1951, No. 17157/51. Addition to 651,132. Class 28 (i). In a pressure cooker a glass inspection disc 1 is surrounded and secured in the lid by a resilient jacket 4. If the lid is formed as a dome 5 it may have an indented shallow shoulder 7 providing, along with a flange 6, a recess, into which the glass disc 1 and its jacket 4 can be pressed to be retained therein. The lid 5 has peripheral spaced lugs 8 to lock the lid on to the body by turning the lid to bring the lugs 8 under like lugs on the body against the resilience of a Y-section jacket 10. Rubber mouldings 2 and 3 receive a relief valve and a flexible plug which may be as described in Specification 662,889, [Group XXIX]. Specification 641,265, [Group XVIII], also is referred to.
Patent GB-1387092-A (GB)
Title: Packaging
IPC: B65D65/46
Filed: 1973-04-10
Abstract: 1387092 Packaging plastics bags or containers WAVIN BV 10 April 1973 [20 April 1972] 17235/73 Heading B8C Bags or containers made of a thermoplastics material such as polyethylene which is subject to disintegration by light radiation are enclosed in a cover made of a material which is impervious to ultra-violet light and comprising a pigmented polyethylene or a laminated polyethylene with one layer containing carbon black and another layer containing calcium carbonate.
Patent GB-222923-A (GB)
Title: A new method of manufacturing lime-sand concrete and bricks, pipes and the like made thereof for building and all other purposes
IPC: C04B22/14
Filed: 1923-07-03
Abstract: 222,923. Caccia, R. July 3, 1923. Concretes.-Lime-sand concretes are improved by adding to the. ingredients a small proportion of dilute sulphuric acid, which enables a lower proportion of lime than usual to be employed. Coal tar or other tar may also be added to render the mixture less hygroscopic. An example of a composition suitable for external walls is :-1 cubic yard of sand, 180 lb. of lime, 2“ lb. of sulphuric acid (diluted 20 times with water), and 2 oz. of tar dissolved in fuel oil.
Patent GB-549353-A (GB)
Title: Manufacture of substituted ethylenes
IPC: C07C49/20
Filed: 1941-02-04
Abstract: 549,353. Anisylethylenes. DAVIES, J. S. H., ELSON, L. A., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Feb. 4, 1941, Nos. 17241/40 and 15909/41. [Class 2 (iii)] Methyl-and ethyl-tri-p-anisylethylene which are oestrogenic agents are made by causing α-methyl- and α-ethyl-deoxyanisoin to undergo a Grignard reaction with anisyl magnesium bromide or iodide, hydrolyzing the organomagnesium compound to the carbinol pp<SP>1</SP>- (CH 3 .O.C 6 H 4 ) 2 :COH.CHR.C 6 H 4 .O.CH 3 , where R is methyl or ethyl, and then dehydrating, e.g. by heating in vacuo or in presence of sulphuric or phosphoric acid, or acetyl chloride or acetic anhydride.
Patent GB-990425-A (GB)
Title: Improvements in and relating to heat-exchangers, such as evaporators
IPC: B01D53/18
Filed: 1962-05-04
Abstract: 990,425. Evaporating liquids. J. M. MALEK. May 4, 1962, No. 17248/62. Heading B1B. Liquids are evaporated in an apparatus comprising a heater 2<SP>1</SP> in which the liquid flows upwards and is superheated (i.e. the pressure-of the column of liquid is such that no vapourbubbles are formed), an upper compartment 8<SP>1</SP> containing one or more perforated trays 5<SP>1</SP>, wherein an emulsion of vapour and boiling liquid is produced, liquid/vapour separator 1<SP>1</SP> to receive the emulsion rising from compartment 81, and' a pipe 12<SP>1</SP> for recirculating the separated liquid to the inlet chamber of the heater. The trays 5<SP>1</SP> may be made of widemesh metallic, or synthetic, material. The formation of the emulsion may be facilitated by an ultrasonic generator. Steam may be injected into the rising column of liquid through small holes pierced in pipe 111. The apparatus shown comprises three evaporators connected in multiple-effect. The liquid to be concentrated is introduced into the first evaporator through nozzle 9. The tubes of the heater 2<SP>1</SP> are heated by steam supplied by pipe 31. The liquid which has been partially concentrated in the first evaporator is transferred to the second evaporator through piping 14<SP>1</SP>; and the liquid which has been further concentrated in the second evaporator is led to the third evaporator through piping 14<SP>11</SP>. The concentrated product is withdrawn from the third evaporator through outlet 10.
Patent GB-497239-A (GB)
Title: Improvements in and apparatus for the wet treatment of cakes of artificial thread, filaments and the like
IPC: D01D10/04
Filed: 1937-06-21
Abstract: <PICT:0497239/IV/1> Cakes of thread for liquid treatment are mounted on a number of perforated tubes which project horizontally from one or more hollow members to which liquid is supplied from a supply pipe which, after a period of treatment, is disconnected and the whole apparatus is rotated through 180 DEG  while moving it to another supply pipe through which liquid is caused to flow to ensure uniform treatment for all the cakes.  The perforated tubes 2 on which the cakes are supported project from hollow metal discs 1 which have flanges 3 for running on rails 4 and are rigidly held in position by struts 5 and communicate with one another through two tubes 6, 7. After treatment with liquid from a supply pipe 11, through which communication is made to the lower tube 7 by a perforated plate 9 against a rubber collar 10, the whole apparatus is moved along the rails 4 and turned thereby through 180 DEG  to bring the upper plate 9 against the collar 10, a stem 12 carrying valve closure discs 13, 14 contacting with a projection 15 carried by another supply pipe to open the lower valve 9 and close the upper one.  In a modification, the hollow perforated cake-supporting arms are attached to a hollow disc which is supplied with liquid through a central pipe connected by a rubber pipe to a source of supply.  A drum which may be rotated by gear or a belt drive is rigidly connected to the disc around the central feed pipe.  After a short period of treatment, the apparatus is disconnected from the source of supply and the drum is rolled along supporting rails until brought up against another supply pipe when the operation is repeated as often as necessary. Specification 483,856 is referred to.
Patent GB-417578-A (GB)
Title: Grid-control arrangement for gas-discharge vessels, more particularly mercury-vapourcurrent rectifiers
IPC: H02M1/04
Filed: 1934-06-12
Abstract: 417,578. Converting. MASCHINENFABRIK OERLIKON, Oerlikon, near Zurich, Switzerland. June 12, 1934, No. 17299. Convention date, June 15, 1933. [Class 38 (ii).] In a rectifying arrangement in which the grid potentials are obtained from a distributer supplied with A.C., the distributer is adapted to rectify the A.C. before applying the control impulses to the grids. The grids 10 are controlled by a distributer 8 having a short segment 6 and a long segment 7 so that the grids connected to the brushes 9 receive a short positive impulse and then are negative for the remainder of the cycle. The segments 6, 7 are connected to the segments 5, 4 of a rectifying device 3, supplied from an auxiliary transformer 1, arranged so that the segment 4 is positive and the segment 5 negative with respect to the neutral point of the transformer 1. A condenser 11 may be connected between the segment 6 and the neutral. Condensers 12 connected between the grids and cathode, or a condenser connected between the segments 4, 5 may be provided to smooth voltage fluctuations.
Patent GB-833167-A (GB)
Title: Improvements in or relating to machines for picking tea leaves
IPC: A01D46/04
Filed: 1958-05-30
Abstract: 833,167. Tea-leaf harvesting. LOISEAU, L. May 30, 1958 [June 6, 1957], No. 17308/58. Class 6(3). A self-propelled or towed machine for picking tea leaves has a plate 1 suspended from the outer end of a pair of levers 8 pivoted on a fixed shaft 10a carried by the machine and balanced to allow the plate to bear on the leaves to be cut, the front of the plate supporting a cutter 6 and means being provided for discharging the cut leaves into a collecting container. The plate 1 is connected by a hose 3 to a chamber 4 housing a suction fan 4a, the chamber being open below to receive a bag 5. A reel 7 brings the leaves to a vertical position for cutting. Adjustable counterweights 9, a pair of detachable stabilizers 12, universal joints 13 and chains 14 and in keeping the plate 1 horizontal. The cutter 6 and fan 4a may be driven from the tractor p.t.o., by a flexible transmission 15 in the case of the cutter, or they may be driven from separate motors. Alternatively the machine may be mounted on a trailer and the cutter and /or fan driven from the land wheels. There may be two plates 1.
Patent GB-545665-A (GB)
Title: Improvements in or relating to roof constructions
IPC: E04B7/14
Filed: 1940-12-05
Abstract: 545,665. Roofs. MITCHELL, F. G. Dec. 5, 1940, Nos. 17349/40 and 6747/41. [Class 20 (iv)] Wires 10 parallel to each other and anchored at their ends support a roof-covering of interlocking slabs, or one cast in situ or of light material, either flexible or rigid, in sheet form. Slab joints are staggered, and underside grooves facilitate positioning on the wires. The sheet material may be corrugated iron combined with a layer of fire-proof heatinsulating material such as slag-wool, and precast concrete slabs may be superposed on these. The sag of the wires may be utilized for drainage by forming a gutter, Fig. 7, at the lowest portion. Wires, instead of being secured directly to side-wall members may be anchored to a bow-shaped girder comprising bracing elements and a compression bar forming a chord extending along the top of the wall. Specification 240,705, [Class 20 (iv)], is referred to.
Patent GB-1341595-A (GB)
Title: Tyre building apparatus
IPC: B29D30/36
Filed: 1971-05-27
Abstract: 1341595 Tyre building apparatus NATIONAL-STANDARD CO 27 May 1971 [18 June 1970] 17454/71 Heading B7C Tyre building apparatus comprises an inter-  mediate drum 4, embodying axially movable drum expanding and contracting means (Specification 1,323,778), disposed between end drum assemblies 5, (6), tyre carcass material 210 overlying the drum 4 and ply turn-up bags 138 of the drum assemblies prior to operation of the apparatus, Fig. la, said operation consisting of partially expanding the drum 4 by rotation of worm 28 causing ring 20 to move together with the axially inward movement of bead shoulder supporting means 63 and carrier means 68. Simultaneously air is introduced through conduit 131 to move piston 125 inwardly and tyre bead flipper means to their Fig. 2a position to form tyre bead shoulders 52. Since sleeve 51 of the apparatus is inextensible and clamped at each end, for the carcass material to remain the same length during the formation of the shoulders air is introduced through hose 118 into cylinder 82 causing the carrier means and hence the clamp means 172, 174 to move inwardly. The tyre beads are now inserted into position and the bags 138 used to turn up the carcass ends 211. The intermediate drum is then further expanded and the tread and sidewall components applied. Collapse of the drum 4 allows the tyre to be removed from the apparatus, the air being at the same time released to permit the flipper means 156 to return to their Fig. 1a, position by the pressure of the tyre and sleeve 51. Air is then introduced into cylinder 82 at the outer end of piston 80 to move the carrier means 68 outwards and retension sleeve 51. The apparatus provides for the spacing of the tyre beads in a desired spaced apart relationship by screwing in and out a threaded stud 112 thus locating carrier member 73 on which the flipper means 156 are mounted.
Patent GB-659665-A (GB)
Title: Method of making metal bodies from metal powder
IPC: C22C33/02
Filed: 1949-07-01
Abstract: 659,665. Powder metallurgy. CLARK, D. M. (Isthmian Metals, Inc.). July 1, 1949, No. 17455. [Class 83 (iv)] In a method of making a soft iron body free from oxides, iron powder containing absorbed oxygen is mixed with carbon powder, pressed at not more than 40 tons per square inch and then sintered and cooled in a non- oxidizing atmosphere, the amount of added carbon being such as to leave not more than 0.4 per cent in the final body. The sintering takes place at between 1800‹ to 2050‹ F. after which the body may be repressed at between 60-90 tons per square inch. Manganese may be present in an amount not exceeding 0.9 per cent. As an example, electrolytic iron powder containing 0.6-0.8 per cent oxygen was mixed with 0.5-0.9 per cent manganese powder, 0.3 per cent powdered graphite and 1 per cent stearic acid or other lubricant. The mixture was pressed at 15-40 tons per square inch and sintered in hydrogen at 2000 ‹ F. for about three hours, the remaining carbon not exceeding 0.1 per cent. The body was then repressed at 75 tons per square inch, the final density being 7.65. It is stated that there is no need to use as much carbon as that required for chemical combination with all the absorbed oxygen in the powder.
Patent GB-259306-A (GB)
Title: Improvements in the construction of surface condensers and the like heat interchanging apparatus
IPC: F28B1/02
Filed: 1925-07-08
Abstract: 259,306. English Electric Co., Ltd., and Mather, J. W. July 8, 1925. Tube-supports.-In heatexchange apparatus such as surface condensers in which cooling water passes through a nest of parallel tubes connecting headers 2, 3 and steam passes through an inlet 9 to an outlet 10 across the tubes, tube-supporting plates 11, 12 extending only partially across the steam space are used, in order to allow some longitudinal movement of the steam. The water headers may be divided by partitions 4 so as to cause the water to have two or more passes across the condenser, and the lines of division between the plates 11, 12 may follow the lines of separation between the passes.
Patent GB-356714-A (GB)
Title: Improvements in or relating to voltage regulators for electrical transformers
IPC: H01H9/00
Filed: 1930-06-06
Abstract: 356,714. Regulating switches; quickaction switches. BRITISH ELECTRIC TRANSFORMER CO., Ltd. and WHISH, A. C., Hayes, Middlesex. June 6, 1930, No. 17581. [Class 38 (v).] In a rotary transformer tapping switch having a pair of follow-up contacts, pairs of tapping contacts are provided and one member of each pair is adapted to be connected directly to a transformer lead and the other member is adapted to be connected to the lead through a resistance. The movable contacts are mounted on separate carriers interconnected by two oppositely acting springs. Two sets of fixed contacts 2, 2a are mounted circumferentially on insulating discs 3, 4. The contacts 2 are connected directly to a lead c<1> of a transformer secondary and the contacts 2a are connected to the lead c<1> through a resistance f, Fig. 7. Mounted on an insulating disc 5 and situated adjacent each pair of contacts 2, 2a are a set of fixed connected pairs of contacts 1, 1a connected respectively to each of the tapping points of the secondary winding. The pairs of contacts 1, 2 and 1a, 2a are adapted to be bridged by movable contacts 25, 26 on carriers 22, 29 rotatable on a spindle 12. The carrier 29 is located in each of its operative positions by a spring- controlled bar 29c having rollers 32 which engage recesses in the ring 33. Springs 33, 33a connect the carriers 22, 29 so that on rotating the carrier 22 by means of the spindle 12 the springs are strained as the carrier 29 is held by the bar 29c. When the contacts 25 reach the next pair of contacts 1, 2 cam surfaces on the carrier 22 lift the bar 29c out of its recesses and the strained springs move the carrier 29 and contacts 26 sharply to engage the next pair of contacts 1a, 2a. During the followup movement the section of the secondary winding between two tapping points is short-circuited through the resistance f. The Specification states that the contacts may be arranged in a straight line instead of on a circle and may have rectilinearly moving bridging members.
Patent GB-738072-A (GB)
Title: Improvements in or relating to processes for manufacturing a weft knitted fabric
IPC: D04B1/14
Filed: 1951-07-25
Abstract: 738,072. Knitting. ARWA FEINSTRUMPFWIRKEREI GES. July 25, 1951 [Sept. 6, 1950], No. 17644/51. Class 74 (2). Individually movable jack sinkers are dispensed with and, using a permanently stretchable yarn (as of a super-polyamide, such as nylon, or perlon), all loops of a course are simultaneously sunk by sinkers 9 carried on a bar 10 and forced in between the needles 5 to deform the laid length of yarn. In the loops of the resultant fabric, the yarn varies in crosssection, as shown in Fig. 9, and this is said to inhibit laddering.
Patent GB-1099697-A (GB)
Title: Improvements in or relating to private branch exchange telephone switching systems
IPC: H04Q3/00
Filed: 1965-04-27
Abstract: 1,099,697. Automatic exchange systems. WESTERN ELECTRIC CO. Inc. April 27, 1965 [April 28, 1964], No. 17652/65. Heading H4K. In a PBX having a large number of exten sions in which incoming and outgoing calls are dialled by an operator, such as that described in U.S.A. Specification 2,904,637, an extension requiring an outgoing call remains off-hook, and the class of service of the operator's trunk is changed so that, when the call has been obtained, she can recall the calling extension by dialling in spite of the busy condition.