baber/WOPTO huggingface dataset:
Patent GB-736908-A (GB)
Title: Dental protheses and processes for their production
IPC: A61C13/00
Filed: 1953-05-14
Abstract: A process for the production of a dental prosthesis comprises disposing a paste or viscous solution which polymerizes at room temperature or a slightly elevated temperature between a model and a base plate, pressing the base plate so that the paste or solution fills all the interstices between the base plate and the model and allowing the paste or solution to polymerize to form a lining on the base plate.  A model is prepared after taking an impression of the jaw.  The base plate is cut to the shape of the model from a sheet of suitable synthetic resin material.  The base plate is softened by boiling water and shaped to the model, the shape being made permanent by immersing in cold water.  A suitable lining mixture is then applied to the tissue side of the base plate which is then pressed on the model so that the mixture fills the interstices between the base plate and the model.  The lining mixture polymerizes at room temperature in a short time. Teeth of porcelain or polymethyl methacrylate are affixed to the plate using the same mixture as for the lining.  The polymerized parts require finishing and polishing. In cutting the base plate a pattern in tin foil cut to the model may be used.  In shaping the base plate to the model the hands may be protected from the heat by placing a foil of cellulose acetate over the base plate. The plastic mixture may be shaped in the mouth of the patient which is protected by greasing with "Vaseline" (Registered Trade Mark).  The base plate is made of copolymers of methyl methacrylate and butadiene or its derivatives, methyl methacrylate or vinyl chloride and acrylates or methacrylates the alcohol radical of which contains more than three carbon atoms or polymethyl methacrylate plasticized with benzyl-butyl adipate or suitable phthalates.  The lining mixture is made from mixtures or viscous solutions of polymeric and monomeric vinyl compounds such as polymeric and monomeric methacrylate or solutions of polymethyl methacrylate in methyl methacrylates containing Redox systems. Styrene, acrylonitrile or compounds having at least two polymerizable double bonds, e.g. divinyl benzene or ethylene glycol dimethacrylate or polyfunctional vinyl compounds may be added to the materials of the base plate.  Specification 558,470 is referred to.
Patent GB-1411196-A (GB)
Title: Electrical resistance welding apparatus
IPC: B23K11/25
Filed: 1973-03-21
Abstract: 1411196 Dental pillars etc ORALTECHNIC ANSTALT 21 March 1973 [22 March 1972 (2)] 13575/73 Heading A5R [Also in Division B3] Apparatus for resistance welding comprises a welding tool, two variable transformers connected to a condenser and a cyclic switching arrangement to produce charging of the condenser to a first weld charge from the first variable transformer followed by discharge of the condenser through the tool to provide a preliminary weld pulse and charging of the condenser from the second transformer to a second weld charge followed by discharge of the condenser through the tool to provide a second weld pulse of greater energy than the first one. The invention is particularly related to welding pins, studs or wires of high melting point metals such as tantalum or titanium in dental or orthodontic work e.g. where pins or studs of these metals fixed in the maxillary bones are welded in situ to form supporting pillars for tooth grafts. The first, lower intensity pulse provides an improved contact between the parts to be be welded capable of carrying the subsequent higher intensity pulse so that arcing and excessive heating in the patients mouth are avoided. A suitable tool, Fig 6, for effecting the welds comprises a scissors-form tongs carrying welding electrodes 51, 52. A detent mechanism 54 . . . . 57 serves to lock the electrodes in the pressure applying welding position. In a circuit Fig 5 for generating two successive pulses of the required intensities motor driven cams 12, 13 control the operation of relays 26, 30, 28, 33 so that a capacitor 37 is charged to a first power level from variable transformer 17, is then discharged through a transformer 35 the secondary of which is connected to the welding tool thereby providing the first weld pulse; capacitor 37 is then charged to a second power level from variable transformer 18 and discharged the second time through transformer 35 to provide the second weld pulse.
Patent GB-225138-A (GB)
Title: Improvements in roller journals
IPC: B02C15/02
Filed: 1924-06-04
Abstract: 225,138. Imray, O. Y., (Raymond Bros. Impact Pulverizer Co.). June 4, 1924. Thrust bearings; dust, excluding; lubricant, retaining.-The packing for the bearing of the roller journal of a pulverizing- mill comprises a flexible channel ring 33 having a spring filling 34 pressing the inner edge of the channel against the journal, and dust-excluding means below the channel ring 33. As shown in Fig. 1, the dustexcluding means consists of annular grooves 32 in a ring 30 bolted' to the bearing housing 12, lubricant leaking into the grooves 32 acting as an oil seal. The spring filling 34 for the ring 33 may consist of one or more metal strips 35, Fig. 3, bent into looped formation. In a modification, Fig. 5, a ring 36 has dust-excluding flanges 38, 40, the former depending in a groove 39 in the roller 10. The weight of the roller and journal is taken by a thrust ring 16, Fig. 1, bolted to a flange 14 on the journal 11 and bearing on a ring 17 fixed in the housing 12.
Patent GB-1071587-A (GB)
Title: Improvements in portable radios
IPC: H05K11/00
Filed: 1966-03-28
Abstract: 1,071,587. Electric battery lamps combined with radios. HENRY CHEN. March 28, 1966, No. 13610/66. Heading F4R. A portable radio is fitted with a socket 7 for a bulb 6 which is connected to the battery 4 which supplies the radio, a switch 14 being provided consisting of a sliding knob 18 which can be moved so as to press a brass strip 15 connected by a lead 17 to the battery into contact with a contact 13 connected to a strip 9 engaging the end contact of the lamp, the socket 7 for which is connected by a lead 11 to the other pole of the battery. The bulb 6 projects partly through an opening in the end of the casing 1.
Patent GB-276288-A (GB)
Title: Improvements in or relating to extensible hinges and fastenings for trunks, cases, and like receptacles of variable capacity
IPC: A45C7/00
Filed: 1927-05-21
Abstract: 276,288. Hill, W. J. May 21, 1927. H a s p fastenings for attachÚ cases and like containers of variable capacity are provided with an externally disposed link d that is pivoted to the inner telescopic section b and connected to the hinged hasp member by, for example, a slidable pivot d', the catch mechanism for securing the telescopic members a, b in their position of adjustment being releasable by the tilting movement of the link. As shown, the link d is provided with a tooth b<2> that co-operates with ratchet teeth a<3> formed on the inner surface of the member a when the members a, b and hinged hasp are, in an aligned position. When the hasp is tilted from this position, a claw d<3> on the link engages with a laterally-extending part b<3> and disengages the tooth b<2> from the ratchet teeth; the telescopic members may then be extended. The link d has a blade spring d<4> that hears on the back of the member a, and the end of the link is pivoted about a pin d<2> carried by the member b, the claw d<3> resting upon the extension b<3> of the blade spring b<1> that carries the tooth b<2>. The ratchet teeth a<3> permit of the telescopic members being collapsed without the link being tilted. This collapse may be prevented by a locking piece e, Fig. 7, with a peg e<1> for engagement with one of a plurality of apertures a<5> in the member a, or by the use of rack teeth instead of ratchet teeth. Specification 289,937 is referred to.
Patent GB-794893-A (GB)
Title: Improvements in or relating to steam generators of the steam transformer type
Inventor: PLUMMER GILBERT ASHTON
IPC: F22B9/12
Filed: 1953-05-15
Abstract: 794.893. Heating steam boilers by steam; return tube steam boilers. THOMPSON WATER TUBE BOILERS, Ltd., J. May 17, 1954 [May 15, 1953, Jan. 18, 1954], Nos. 13740/53 and 1504/54. Class 123(2) In a low pressure steam generator especially for marine use, water contained in a drum 1 is evaporated under normal conditions by high pressure steam, for example from the main boilers of the vessel, the steam flowing through a nest of tubes 8 immersed in the water When high pressure steam is not available, alternative heating means are provided for steam generation the means comprising two drums 21, 22 disposed below the main drum 1 and connected thereto by downcomers 23 and steam and water risers 24 which open into drum 1 just below the water level 11 therein. Each drum 21, 22 has a longitudinally disposed gas cooling tube 28 therein, the tubes leading to respective smoke boxes 25 whence return tubes lead back through the drums to gas uptakes 31, 32. From the front end plates of drums 21, 22 each of the tubes 28 is' extended forwardly to form short combustion chambers 29, 30 each of which is fired by a gas or oil burner producing combustion gases which are non-luminous, combustion being substantially completed within the chambers. With this arrangement the heat transfer in tubes 28 is predominantly by convection allowing a reduction in diameter of the tubes to much below that required for the same steam output with firing means producing luminous, highly radiant gases. In a modification, a return-tube, dry-back boiler has a flue tube of small diameter provided with an external combustion chamber, and a high pressure steam coil is disposed between two banks of return tubes to provide alternative heating for the boiler.
Patent GB-817635-A (GB)
Title: Improvements in or relating to printed circuit assemblies
IPC: H05K1/16
Filed: 1956-05-04
Abstract: 817,635. Printed circuits. HARDING, T. B., and MIDDLETON, J. D. May 6, 1957 [May 4, 1956], No. 13767/56. Class 37. [Also in Group XL (c)] In a printed circuit a capacitor whose value has to be pre-set, has one electrode in the form of an elongated portion of the printed circuit connected at one end to the remainder of the circuit, whereby its value may be pre-set to a desired value by cutting across the electrode at an appropriate point along its length. Fig. 2 shows two such electrodes 14, 15; they are provided with notches along their lengths and these are numbered to assist in identifying the notches. The reverse side of the printed circuit panel may also carry a portion of the printed circuit, Fig. 1 (not shown); in this event the conductor on the reverse side may be cut away immediately beneath the electrode 14 or 15 where only a small total capacitance is required. The printed circuit assembly may form part of a television tuner (see Group XL (c)) the printed circuit on the reverse side of the panel supporting metal contacts which engage with moving contacts connected to the tuning coils.
Patent GB-458260-A (GB)
Title: Improvements in and relating to tobacco pipes
IPC: A24F1/32
Filed: 1935-05-10
Abstract: A tobacco pipe having a moisture permeable bowl is provided on its exterior surface with a heat-resisting, non-thermoplastic coating having a basis of a cellulose ester and a cellulose ether p  and permeable to water vapour.  A suitable coating includes cellulose nitrate which is porous to water vapour and ethyl or benzyl cellulose which acts as a stabilizer against light and heat and also as a bonding agent to secure better adhesion of the coating.  An example of a suitable lacquer is: nitrocellulose 6,05 parts by weight, ethyl cellulose 2,75 parts, ethyl acetate 5,30 parts, butyl acetate 1,30 parts, butyl alcohol 11,95 parts, ethyl alcohol 8,30 parts, xylol 12,80 parts, mineral spirits 80/100 16,10 parts, ethylene glycol monoethyl ether 13,60 parts, and toluol 20,85 parts.  The nitrocellulose should not exceed 85 per cent of the total solids. The lacquer may be applied by spraying or dipping, more than one coat being applied if desired.  The coating is heat resisting, does not discolour or darken the grain of the pipe, is unaffected by perspiration on the hands of the smoker, does not blister, is unaffected by tarry matter and acids resulting from smoking, is tasteless and permits the bit of the pipe to be fitted before finishing, since no baking is required.ALSO:A tobacco pipe having a moisture-permeable bowl is provided on its exterior surface with a heat-resisting, non-thermoplastic coating having a basis of a cellulose ester and a cellulose ether and permeable to water vapour. A suitable coating includes cellulose nitrate which is porous to water vapour and ethyl or benzyl cellulose which acts as a stabilizer against light and heat and also as a bonding agent to secure better adhesion of the coating.  An example of a suitable lacquer is: nitrocellulose 6,05 parts by weight, ethyl cellulose 2,75 parts, ethyl acetate 5,30 parts, butyl acetate 1,30 parts, butyl alcohol 11,95 parts, ethyl alcohol 8,30 parts, xylol 12,80 parts, mineral spirits 80/100 16,10 parts, ethylene glycol monoethyl ether 13,60 parts, and toluol 20,85 parts.  The nitrocellulose should not exceed 85 per cent of the total solids. The lacquer may be applied by spraying or dipping, more than one coat being applied if desired. The coating is heat-resisting, does not discolour or darken the grain of the pipe, is unaffected by perspiration on the hands of the smoker, does not blister, is unaffected by tarry matter and acids resulting from smoking, is tasteless and permits the mouthpiece to be fitted before finishing since no baking is required.
Patent GB-735936-A (GB)
Title: Improvements in or relating to pressure-proof housings
IPC: H01H9/04
Filed: 1952-05-30
Abstract: 735,936. Closures for resisting fluid pressure. SIEMENS-SCHUCKERTWERKE AKT.-GES. May 30, 1952 [Oct. 17, 1951], No. 13858/52. Class 123(1). [Also in Group XXXVII] The pressure proof casing of apparatus such as electrical equipment to be used in mines or other places where there is danger of explosion, comprises a housing part and a cover, both having walls thick enough to withstand the pressure of an explosion, both having flanges normally abutting to form an airtight seal, but held in such a way that internal pressure can cause separation of the flanges, labyrinthine means in the joint preventing particles from passing out of the casing. This means may comprise a bar 6 in slots 5 in the flanges. A tongue 22 and the groove 23 in which it fits may be formed in separate pieces fixed to the housing parts, Fig. 6. The pieces may be held by pressure, screws or locating pins, and may extend around the whole or part of the periphery of the casing, overlapping edges being arranged in other parts. Abutting ends or crossing over parts of bars 6 may be joined by inter-engaging recesses and projections arranged to maintain the labyrinthine effect. Fig. 8 shows a casing 31 with a cover 29 hinged at 30 and sealed with a bar screwed to the cover along the edges parallel to the paper, and by overlap along the other edges 32, 33. A bar and slot seal may be provided at the hinged edge. Where a slot cuts an overlapping edge the bar 40 which fits it may carry a suitably shaped extension 41.
Patent GB-1171906-A (GB)
Title: Shoe Tree.
Inventor: MERRIAM ANTHONY FREDERIC
IPC: A43D3/14
Filed: 1965-12-02
Abstract: 1,171,906. Boots, &c. A. F. MERRIAM, V. R. WILTSHIRE and D. R. INGLIS. 30 Nov., 1966 [2 Dec., 1965; 29 March, 1966], Nos. 51199/65 and 13866/66. Heading A3B. A shoe tree consists of a T-shaped blank of resilient material, the arms 3 of the blank being bendable towards each other to form an arch to bear on the inside of the front part of a shoe. The leg 2 may be bent to engage the heel of the shoe as shown in Fig. 2 or may be bent under the arch formed by the arms 3 as shown in Fig. 4. Suitable materials for the blank are polystyrene, cellulose acetate, cardboard or metal. '
Patent GB-1354312-A (GB)
Title: Roller bearings
IPC: F16C27/04
Filed: 1971-05-10
Abstract: 1354312 Bearings TORRINGTON CO 10 May 1971 [22 May 1970] 13952/71 Heading F2A A roller bearing assembly comprises an annular outer member defining an outer race surface, an inner member defining an inner race surface, and a plurality of rollers interposed between said race surfaces, said outer and inner members being such as to produce, in combination with solid rollers, a roller bearing assembly having significantly inferior runout characteristics, the rollers being hollow and oversized so as to be radially preloaded between said race surfaces to accommodate manufacturing inaccuracies in the members. The hollowness of the rollers is from 50-81%. Each roller may have a double tapered bore having a minimum diameter substantially at the axial centre of the roller.
Patent GB-776098-A (GB)
Title: Improvements in or relating to frequency mixers
IPC: H03D9/06
Filed: 1955-05-13
Abstract: 776,098. Frequency charging circuits. TELEFONAKTIEBOLAGET L. M. ERICSSON. May 13, 1955 [May 4, 1954], No. 13958/55. Class 40(6) In a frequency changer having two non-linear elements fed with signal and local oscillations, a phase shifting device carrying both oscillations is arranged to connect the two elements so that signals fed to one element are phase shifted by 90 degrees with respect to the signal applied to the other. A signal is fed over line 5, Fig. 6 and local oscillations over line 7 to a diode 1 both oscillations also being fed down line 9 to a second diode 2. The output from the diodes 1, 2 are combined and fed to LF. discharge tube 17. The length of the line between the diodes 1, 2 is chosen to be one-quarter of a wavelength at the signal frequency and the line 9 is continued in a quarter-wave length stub. In a modification Fig. 7 (not shown) the local oscillation is applied to the diode 2 so that the output from diodes 1, 2 differ in phase by 180 degrees, and are combined in a transformer and fed to tube 17. In a modification, Fig. 8 the diodes 1, 2 are arranged in series, the D.C. path from diode 1 being completed over a stub 22 and the output from line 9 being taken through a further stub 21. A wave guide 23 may be employed, Fig. 9 matched by a stub 24 into a guide 9 having an admittance half that of the guide 23. The diodes 1, 2 may be arranged in series, Figs 10a (not shown). The signal and local oscillations are fed in through guide 23 but in a modification Fig. 11, local oscillation is fed in through guide 26, the outputs from diodes 1, 2 being out of phase and combined in transformer 19. For operation at lower frequencies, the signals are fed in over input 5, Fig. 15, filters 29, 30 producing a net phase shift of 90 degrees to the diodes 1, 2. In a modification Fig. 14 (not shown) only one filter is employed.
Patent GB-269751-A (GB)
Title: Improvements relating to jigging conveyors
IPC: B65G27/00
Filed: 1926-06-03
Abstract: 269,751. Blantyre Engineering Co., Ltd., and Little, T. June 3, 1926. Jigging conveyers.-Adjacent sections 1, 2 are connected by the insertion of the depending part 3a of an angle bar 3 in the pocket 8 between an angle bar 5 and a supplementary bridge bar 6. A locking bolt may be passed through the angle bars.
Patent GB-1253715-A (GB)
Title: Anti-friction means for facilitating movement of flat plates or other suitable articles
Inventor: MURRAY JOHN JAMES
IPC: B65G11/20
Filed: 1969-03-18
Abstract: 1,253,715. Shoots with friction reducing means. J. J. MURRAY. 13 May, 1970. [18 March, 1969], No. 14053/69. Heading B8S. A shoot 10 has part-spherical projections 12 on its upper surface to reduce friction. If the material of the shoot is thin the projections may be pressed therein. The shoot may be mounted on balls 14 and springs 13 so that it can be vibrated.
Patent GB-1055141-A (GB)
Title: Improvements relating to hair dryers
IPC: A45D20/08
Filed: 1962-04-12
Abstract: 1,055,141. Hair driers. E.A. PATTERSON. July 12, 1963 {April 12, 1962], No 14127/62. Heading A5R. A hair drier comprises a hood 15 and a cabinet 1. a fan 21 and a heater 5 supplying air through a duct 2 to the hood and additional ducting 3 communicating with an outlet point 10 separate from the hood. An additional duct 3 is supplied with air from a second fan 21 mounted on the shaft of the motor 20, which drives the first fan, and includes a heater 6. Alternatively, the additional duct may be supplied with air from the fan and heater supplying the hood. A second additional duct 4 may be provided between the hood supply duct 2 and an inlet 9 in the cabinet. In the event of one hair drier A failing, the inlet 9 may be connected with the outlet point 10 of a second hair drier B which will thus supply the hood of the first hair drier. A flap valve 7 controls the flow of air through the duct 2 from the fan and through the second additional duct 4 from an adjacent hair drier. A flap valve 8 in the first additional duct 3 may be opened to permit escape of air into the cabinet when a supply of air at the outlet point 10 is not required. The outlet 10 may be connected with a drying cabinet or used to supply warm air to a room. Air enters the top of the cabinet through a grille 17 and a filter 18 for circulation by the fans. According to the Provisional Specification, a towel drier may be incorporated in the air drier cabinet.
Patent GB-1500424-A (GB)
Title: Three-way cocks
IPC: F16K11/04
Filed: 1975-04-07
Abstract: 1500424 Valves ITW FASTEX ITALIA SpA 7 April 1975 [5 April 1974] 14128/75 Heading F2V A three-way cock for connecting main and reserve fuel tanks of a motorcycle to a carburetter has a resilient sleeve 46 disposed about an eccentric portion 36 of a valve stem 12 to selaingly engage the opening of an inlet 16, the opening of an outlet 18, or neither. The opening of the other inlet 14 is not controlled.
Patent GB-1338044-A (GB)
Title: Bulk-polymerization method including a cold-forming step
IPC: B29C48/00
Filed: 1971-05-11
Abstract: 1338044 Producing bulk polymerized polymer articles TOYOTA CHUO KENKYUSHO KK 11 May 1971 [12 May 1970] 14261/71 Heading C3P [Also in Division B5] Plastics articles are formed by a method which comprises bulk polymerizing at least one bulk polymerizable monomer to such an extent as to provide a solid amenable to plastic deformation at room temperature, cold forming said solid into an article, and completing the polymerization of said article. The deformable solid is preferably characterized by a degree of polymerization of between 60 and 95%. At least one of the polymerization steps may be performed by illumination with light or irradiation with nuclear radiation. The cold forming step may include drawing, rolling, extruding, punching, forging or stamping. The coldforming step may be carried out in a die and the completion of the polymerization of the article carried out in the die. The monomer is preferaby a thermoplastic resin monomer, such as an acrylic monomer or styrene. In the examples, polymethyl methacrylate is made into a cup and a sheet, and a styrene/acrylonitrile copolymer is formed into a cup.