baber/WOPTO huggingface dataset:
Patent GB-171406-A (GB)
Title: Improvements in dental engine handpieces
IPC: A61C1/14
Filed: 1921-11-12
Abstract: 171,406. White Dental Manufacturing Co., S. S., (Assignees of Porter, W. R.). Nov. 12, 1920, [Convention date]. Dental engines.-In an " all-cord " or beltdriven dental handpiece, which does not include a slip-joint as part of its construction, the chuckoperating mechanism is actuated by relative axial sliding movement of parts of the handpiece. The handpiece comprises a front spindle 1, Fig. 2, connected through a wedge slide 2 to the driving shaft 3 by a T-head and socket joint 37, 36, shown separately in Fig. 3. The wedge slide 2 is formed with a key 40 extending into a keyway 41 in the spindle 1 which is fitted with a pivoted lever 50, plunger 59 and double split chuck 56. A thrust-bearing washer 46 for the rear of the spindle is adjustable by means of a collet 6 which surrounds the driving shaft slide or bearing 5 and is adjustably connected to the outer casing 4 by a screw thread and is secured by a split lock nut 7. The collet 6 and slide 5 are connected by a key 10 working in a keyway 9. The slide or bearing 5, which moves longitudinally with the shaft 3 relatively to the front spindle and outer casing, for operating the chuck, is formed with an enlarged head 12 against which the driving pulley 13 rotates and which is flanged to provide an oil retaining annular space 14. The head 12 is rotatably supported in an extension 15 of the wrist joint frame 16 of well known construction. The forward end of the extension 15 carries a shield 19 which covers that part of the slide 5 which otherwise would be exposed when the parts of the handpiece are in the position shown in Fig. 2. A spring 20 confined between the extension 15 and a nut 22 on the slide 5 provides sufficient friction normally to prevent the slide 5 and outer casing 4 from rotating with the shaft 3, but permitting them to turn with the natural movements of the hand of the operator. The extension 15 is formed with an annular oil chamber 25 housing a spring 27 which normally closes the oil inlet aperture 26, and the slide 5 is formed with an aperture 32 opening into the chamber 25. The collet 6 is provided with an oil hole 62 which registers, in one position of the parts, with an opening 63 in the slide 5 and is accessible on removal of the outer casing 4. The shaft 3 may be withdrawn from its bearing slide 5 on removal of the outer casing 4 and of the pulley 13 and may then be separated from the wedge slide 2 by lateral movement of the joint members 36, 37.
Patent GB-1090928-A (GB)
Title: Improvements in or relating to unwinding yarn from packages arrayed in series
Inventor: HORWOOD JOHN MAURICE
IPC: B65H49/12
Filed: 1965-07-16
Abstract: 1,090,928. Yarn guide. IMPERIAL CHEMICAL INDUSTRIES Ltd. June 21, 1966 [July 16, 1965], No. 30271/65. Heading D1J. A resilient yarn guide 3 is provided on a yarn unwinding device such as'a creel to retain the joined ends 14, 15 of two packages 4, 4 and to keep them remote from -the balloon of unwinding yarn and resiliently move on continued yarn withdrawal so that the yarn slides over an ends of the guide without increase in tension. The resiliency of the guide may be provided by the material from which it is made, e.g. polyethylene or by a thin. portion along its length e.g. in a U-shaped rod of a synthetic polymer (polyamide, e.g. nylon or polyolefine e.g. polypropylene) or by a resilient hinge, such as a rubber tube or rod formed between two rigid portions the end of guide can be forked.
Patent GB-1043708-A (GB)
Title: Improvements in and relating to fan blades
Inventor: LEVACIC IVAN
IPC: F04D29/34
Filed: 1962-08-08
Abstract: 1,043,708. Axial-flow fans. AEREX Ltd. July 11, 1963 [Aug. 8, 1962], No. 30305/62. Heading F1C. The subject matter of this Specification is substantially the same as that described in Specification 1,043,707, but the claims are concerned with an axial-flow fan blade of resiliently deformable sheet material and provided with a laterally extended root portion of arcuate shape which, when curved into ring form about a radial axis for the blade, causes the blade to present a relative camber of not less than 0À12 in the region of the blade root portion. The sheet material may be polypropylene, rubber or spring sheet metal and may be of variable thickness, for example, decreasing in thickness from root to tip or tapered at the edges. The relative camber may diminish radially outwardly and the blade may be twisted.
Patent GB-1207237-A (GB)
Title: Depth stop and hand grip fastening arrangement for drilling and like machines
IPC: B23B49/00
Filed: 1968-06-25
Abstract: 1,207,237. Drilling machines. HILTI A.G. 25 June, 1968 [24 July, 1967], No. 30347/68. Heading B3C. A depth stop 6 on a portable drilling machine or like machine tool having a detachable hand grip 3 is secured in position by the same means which secures the hand grip. As shown the hand grip 3 is secured to a cylindrical part of the tool body 1 by a two-part clamp 2a, 2b tightened by rotating the hand grip about its longitudinal axis. The depth stop 6 forms the hinge pin of the clamp and is secured in position as the clamp is tightened. In another embodiment the hand grip is screwed into the tool body and the depth stop is clamped between a pressure plate and the body as the hand grip is tightened.
Patent GB-451898-A (GB)
Title: Improvements in or relating to lighting circuits for automobiles
IPC: B60Q11/00
Filed: 1935-11-02
Abstract: 451,898. Lamp - - failure alarms. RUDKIN, L. C., 31, Belltrees Grove, Streatham, London. Nov. 2, 1935, No. 30358. [Class 118 (ii)] Failure of the rear lamp of a vehicle causes illumination of the stop light or an additional lamp or another filament in the rear lamp and gives a signal on the dashboard. Where a second filament is lit, an additional tell-tale lamp may be provided to indicate failure of this filament. As shown in Fig. 1, when the rear lamp r is alight magnet s holds open contacts s'. If the lamp fails, contacts s<1> close and the " stop light w and tell-tale lamp d are energized. In the arrangement shown in Fig. 2, two filaments r<1>, r<2> are provided in the rear lamp, the magnet s being energized in series with filament r<1>. If this filament fails, the filament r<2> is put in circuit and both tell-tale lamps d, d<1> are lit, the lamp d going out if the second filament r<2> fails. Reference has been directed by the Comptroller to Specifications 110,373, 258,914, 292,841, [all in Class 118 (ii)], and 411,018.
Patent GB-1390716-A (GB)
Title: Ester of trimellitic anhydride and process for producing the same
IPC: C08G65/332
Filed: 1973-06-27
Abstract: 1390716 Esters of trimellitic anhydride; curing epoxy resins MITSUBISHI DENKI KK 27 June 1973 [27 June 1972 4 July 1972] 30491/73 Headings C3R and C3B Polyalkyleneetherpolyol esters of trimellitic anhydride having the formula where R is polyalkyleneetherpolyol residue and n is 2 to 6, are obtained by heating polyalkyleneetherpolyols with trimellitic anhydride at 200‹ to 300‹ C. and distilling off water formed by the esterification. The products may be used to cure epoxy resins. In examples trimellitic anhydride is heated with polyethyleneglycols, polypropyleneglycols and polytetramethyleneglycols; the products are heated with the glycidylether of bisphenol A, diglycidyl hexahydrophthalate, #-methyldiglycidyl ester of bisphenol A, 3,4-epoxycyclohexylmethyl-3,4-  expoxycyclohexanecarboxylate and #-methyldiglycidylester of tetrahydrophthalic acid, to obtain cured resins, other ingredients of the mixtures being benzyldimethylamine, hexahydrophthalic anhydride and zinc octylate.
Patent GB-484682-A (GB)
Title: Improvements in or relating to electric fans
IPC: F04D29/64
Filed: 1936-11-09
Abstract: 484,682. Screw fans. GENERAL ELECTRIC CO., Ltd., and CRANSTON, W. M. Nov. 9, 1936, No. 30496. [Class 110 (i)] An electric fan comprising an internal stator and an external rotor provided with fan blades has guard means arranged to shield the rotor and the blades and carried or supported with them. The pivoted head 2 carries a spindle 1 supporting the windings 5 and core 6 of the stator and also the rotor 7 with blades 14 and core 8 with squirrel-cage winding. The guard 15 is supported from the head 2 and may shield automaticallyoperated deflectors which may rotate about the axis of the fan. The deflectors may be of the kind shown in Specification 461,345 and may form part of the guard which may be rotatably mounted. The deflectors may be driven frictionally.
Patent GB-473576-A (GB)
Title: Improvements in and relating to the mounting of electrical apparatus
IPC: H01H9/44
Filed: 1936-11-09
Abstract: 473,576. Electromagnetic contactors. TELEMECANIQUE ELECTRIQUE. Nov. 9, 1936, No. 30507. Convention date, Nov. 20, 1935. [Class 38 (v)] In order to strengthen the mounting of apparatus such as electromagnetic contactors which have the fixed contact and blow-out coil supported by the same part, a single bar which forms the supporting base of the contactor carries the fixed portion of one pole by means of a clamping arrangement constituted in one part by an extension of the fixed contact support and in the other part by a clamp which forms a terminal and is electrically united to the shoulder of the fixed contact support by the blow-out coil, the clamp and shoulder being situated on different parts of the fixed single bar or base, an insulating sheath being interposed. As shown in the Figure, the shoulder of the carrier 3a supporting the fixed contact 3 is held against a bar 1 surrounded by an insulating sheath 5 by a clamp 6 which supports at 6a one end of the magnetic blow-out coil 8 and with the aid of a screw 7 forms a terminal of the contactor. The other end of the coil 8 is clamped to the carrier 3a. The clamping screws 9 pass through insulating sleeves 11 in holes 10 formed in the support 6, and also hold in position an insulating plate 12 carrying a terminal connection 13, 14 joined by a flexible connection 15 to the movable contact 4, which is spring mounted on the pivoted operating-shaft 2. The shaft 2 is supported indirectly from the bar 1 which thus forms the supporting base of the contactor.
Patent GB-459252-A (GB)
Title: Improvements in, or relating to, means for machining undercut grooves
IPC: B23D3/02
Filed: 1935-11-05
Abstract: 459,252. Tool holders for planing &c. AUSTIN MOTOR CO., Ltd., and CHANTREY, T. E., Longbridge Works, Northfield, Birming- ham. Nov. 5, 1935, No. 30509. [Class 83 (iii)] [See also Group XXXII] A planing or shaping machine for cutting an undercut groove a comprises a tool holder B pivoted at b to a head C and carrying a depending arm el, e2 which trails over the work as shown in Fig. 1 during the cutting stroke, but which has its forward swing limited by an abutment f<3> so that it raises the tool D clear of the work, Fig. 3, during the return stroke. The arm portion e<2> carries rollers e<3> and can swing relatively to the portion el to an extent determined by abutment surfaces f, f<2>. After the work A, Fig. 3, has passed the rollers e<3>, the holder is free to swing back to its cutting position against the cushioning resistance of a dash-pot G, Fig. 7, comprising a piston h pivoted at h<1> to the tool head and engaging in a pivoted air cylinder g fitted with an adjustable needle exhaust valve k. When the holder B swings outwardly, air flows freely into the cylinder through a spring-closed valve m. This valve also coacts with an abutment p which opens the valve and allows free exhaust from the cylinder as the tool holder approaches the vertical position in readiness for a cutting stroke.
Patent GB-1205994-A (GB)
Title: Improvements in high frequency semi-conductor diodes
IPC: H01L23/482
Filed: 1968-06-26
Abstract: 1,205,994. Semi-conductor diodes. SOC. EUROPEENE DE SEMICONDUCTEURS. 26 June, 1968 [6 July, 1967], No. 30579/68. Heading H1K. The semi-conductor wafer of a high frequency diode is provided on one face with a large number of small cavities the walls of which have a conductivity type opposite to that of the wafer. One electrode of the diode is applied to the plane face and a pointed wire electrode is pushed against the other face until it drops into one of the cavities in which it is retained by soldering or by the spring action of the wire. As described, an N type silicon wafer has boron diffused through the oxide layer 8 to form P type regions 9 which are each metallized 10 with gold by evaporation and then with a soldering metal such as silver, tin, or gold-tin applied by electrolysis. The wafer is bonded with goldantimony to a molybdenum lead sealed into a glass envelope, and a gold or gold-containing wire 7 (also attached to a molybdenum lead) is pushed against the wafer and the housing sealed and soldering completed together.
Patent GB-748731-A (GB)
Title: Improvements relating to grabs
Inventor: PRIESTMAN SYDNEY HERBERT
IPC: E02F3/413
Filed: 1953-11-05
Abstract: 748,731. Grabs for handling material. PRIESTMAN BROS., Ltd. Oct. 21, 1954 [Nov. 5, 1953], No. 30640/53. Class 78 (4). The opening rope 20, Fig. 3, of a grab of the type in which the buckets 4, 5 are carried on long arms 1, 2 leaves the grab at a point remote from the head so that the grab tilts when supported by the opening rope to discharge its material through the open rear end of one of the buckets. A gravity closed flap 36 may normally close this bucket. In the construction illustrated the opposite bucket 5 is also open at its end but is formed with a curved portion 8 to prevent loss of material when the grab is supported in an upright closed position by the closing rope 17. The closing rope passes from a pulley 19 on the head around pulleys 16, 15 on the arms 1, 2 to an anchorage 18 on the arm 2. The opening rope 20 is dead-ended on the pivot 3 of the grab and passes around a pulley 14 on opening links 9, 10 and around a pulley 21 at the grab head to the pulley 22 by which it leaves the grab. A fairlead 23 carried by an arm 24 swinging on the same axle as the pulley 22 prevents the opening rope 20 from fouling the grab mechanism. In alternative constructions the opening and closing ropes are differently reeved and the closing rope 17 may leave the grab on the opposite side of the head from the opening rope 20. The opening rope 20 may be secured to the bottom corner 8 of the bucket 5 instead of to the opening mechanism : the connection is preferably made through a portion of chain passing round the corner 8 and anchored in a pocket in the underside of the bucket 5. To ensure that the grab remains open until both buckets have engaged the ground a latch 26, Fig. 12, pivoted on the pin 13 joining the opening links 9, 10 is adapted to engage over the grab head pivot 3. The latch is controlled by pins 28, 29 on the link 9 so that it automatically engages the pin 3 when the grab is opened, and can be released only by further slackening the closing rope 17 when the grab is open and resting the material on to be grabbed.
Patent GB-1148007-A (GB)
Title: Improvements in or relating to a method of and apparatus for crucible-free zone melting
IPC: C30B13/28
Filed: 1966-07-07
Abstract: 1,148,007. Zone-melting. SIEMENS-SCHUCKERTWERKE A.G. 7 July, 1966 [10 July, 1965; 26 April, 1966], No. 30649/66. Heading B1S. In the zone-melting of a rod 2 of silicon using a seed crystal and induction heating, the recrystallized rod is after-heated by radiation from a surrounding cylinder 5 which is heated to 1,500‹C by resistance or induction heating. The cylinder is of tungsten, molybdenum, or graphite coated with pyrolytic hard carbon. The cylinder has an internal diameter at least as large as that of the rod and is as long as the molten zone. Melting is effected by a pancake induction coil 4 having a diameter which i's larger (Fig. 1) or smaller (Fig. 4) than that of the rod (in the latter case, the molten zone being a narrow neck). The rod may be preheated before zone-melting by a cylindrical induction coil 6.
Patent GB-266816-A (GB)
Title: Improvements in or relating to electric relays
IPC: H01H50/24
Filed: 1925-12-04
Abstract: 266,816. Reyrolle &. Co., Ltd., A., and Leeson, B. H. Dec. 4, 1925. Automatic circuit-breakers etc.; electromagnetic switches; retarding devices. - A relay comprises a spindle A, Fig. 1, carrying an armature C which is located within a coil D such as described in Specification 118,894, and upon excitation of the coil, the spindle is turned in the direction of the arrow a against the action of a spring B attached to an adjusting-head B<1>. A second spindle E carrying a contact H is urged by a spring F attached to an adjusting-head F<1> in the direction of the arrow b but is restrained from movement by the engagement of arms H<1>, K until the spindle A is turned, whereupon the spindle E turns slowly owing to its inertia, produced by exchangeable weights G' on an arm G, and finally causes the contact H to engage fixed contacts J to complete any desired circuit. In a modification, the spindle E instead of carrying a contact H, carries an arm M, Fig. 3, which when the spindle turns moves a trigger N away from a lever N', which thereupon turns under the action of a spring N<2> and closes a circuit at contacts J<1>, and also displays an indicating disc N<3>. The spring F may be replaced by a spring having its ends secured to the arms H<1>, K.
Patent GB-1365268-A (GB)
Title: Disposal of waste material from unsaturated nitrile plant
IPC: B01D53/34
Filed: 1972-06-30
Abstract: 1365268 Disposal of waste material from unsaturated nitrile plant BADGER CO Inc 30 June 1972 [2 Aug 1971] 30687/72 Heading C2C In the ammoxidation of olefines to nitriles, e.g. of propylene or isobutylene to acrylonitrile or methacrylonitrile respectively, an improved process for recovering and disposing of waste materials is described. The unsaturated nitrile, ammonia and waste materials formed as byproducts of the reaction are adiabatically cooled in a quenching chamber by evaporation of at least one vaporizable liquid medium selected from water and a hydrocarbon solvent, to condense any polymers formed as by-products of the reaction. The condensed polymers and any entrained catalyst fines are flushed out of the system in a small stream of unvaporized solvent. The partially quenched effluent recovered from the quench column is then optionally treated to condense water and hydrocarbon solvent which are recycled to the quench column and passed to an absorber column operating at a temperature above the dew point of the water in the effluent and using a hydrocarbon solvent as absorption medium for the unsaturated nitrile. The solution formed by the unsaturated nitrile together with small amounts of by-product and the hydrocarbon solvent is recovered and the byproduct removed as overhead in a lights distallation column and recycled to the absorber. The unsaturated nitrile bottoms product is recovered as high purity product in a succeeding product column, the hydrocarbon solvent being recycled to the absorber and lights column. The hot absorber off gases are treated to recover any hydrocarbon solvent and incinerated, ammonia, HCN, acetonitrile and some vaporized solvent furnishing the fuel. To minimize loss of solvent to the incinerator, the off-gases from the absorber may be scrubbed with a scrubbing oil to remove the solvent.
Patent GB-484995-A (GB)
Title: Improvements in the catalytic reduction of carboxylic acids
IPC: C07C29/149
Filed: 1936-11-10
Abstract: Alcohols are produced by the reduction of free high molecular weight non-aromatic acids with hydrogen under pressure in the presence of nickel, cobalt, and/or copper and of basic oxides of di- or tri-valent metals in amount at least equivalent to the free carboxylic acid present.  Alternatively the salts of the carboxylic acid with di- or tri-valent metals, may be reduced with hydrogen. Suitable acids are those having at least 8 carbon atoms such as stearic, oleic, and palmitic acids, the oxidation products of paraffin wax, higher paraffin hydrocarbons, and of hydrogenation products of coal, tars and mineral oils in the liquid phase preferably at 100-200 DEG  C. with oxygen, nitrous gases, nitric acid and the like in the presence of catalysts such as manganese palmitate, sodium carbonate-manganese stearate, sodium palmitate-aluminium palmitate and the like.  When the soaps are to be reduced they may be in solution or suspension in alcohols such as dodecyl or hexadecyl alcohol, dioxane or ethers or paraffins of high molecular weight.  In examples, (1) paraffin oil is oxidized with air at 140 DEG  C. in the presence of manganese stearate, and the product is reduced with hydrogen at 200 atmospheres, in the presence of a catalyst consisting of 15 parts cobalt and 85 parts magnesia; (2) a similar oxidation product of paraffin oil made in the presence of calcium naphthenate is reduced with hydrogen in the presence of a cobalt-calcium oxide catalyst; (3) an oxidation product of Diesel oil is reduced in the presence of a copper-magnesia catalyst at 270 atmospheres; (4) an oxidation product of soft paraffin wax is heated with zinc oxide at 100 DEG  C. and reduced in the presence of a copper-magnesia-chromium oxide catalyst at 200 atmospheres.
Patent GB-136550-A (GB)
Title: Improvements in Type-writing Machines.
Inventor: ERNST JUCKER
IPC: B41J35/34
Filed: 1919-12-08
Abstract: 136,550. Jucker, E. Dec. 6, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Ink-ribbon mechanism; sheet and web guiding arrangements.-In a duplicating-arrangement, the copy is inked by a special ink-ribbon which is arranged parallel to the platen and passes between the sheets or webs, the original being inked by the usual ink-ribbon; or the special ink-ribbnn may be inked on both sides and be employed for inking an original sheet and a transparent copysheet which are arranged at the back and front of the ink-ribbon respectively. For producing two or more copies, two or more special ink-rib. bons are provided. In the arrangement shown in Figs. 1 and 3, the special ink-ribbon 16 is carried by spools 17, 18 rotatably mounted in bearings 20, 21 on the platen-carriage 19, and is guided by slots 13, 15 in an apron 10 which is arranged between the platen-roller 5 and the usual apron 9, and is formed with an opening 12 for the passage of the types. The slots 15 are formed in wings 14 on the apron. The copy 30 and original 31 pass between the platen-roller and the apron 10, and between the aprons 9, 10 respectively. The rear end 11 of the apron 10 is rounded and projects above the apron 9. The original and copy are inked by the usual ink-ribbon 3 and special ink-ribbon respectively. To prevent the copy from being smeared when the platen-roller is rotated for line-spacing, the apron 10 is provided at the ends with rollers 29, Fig. 1, which engage the line-spacing wheel 6 and a ratchet wheel 7 at the other end of the platenroller. Upon rotation of the platen-roller, the teeth of the ratchet-wheels ride over the rollers 29 and cause the front part of the apron 10 to be forced away from the platen-roller and the special ink-ribon to be moved out of contact with the copy. The spool 18 is coupled to a ratchet-wheel 25, Fig. 1, engaged by a pawl on a lever 24 which engages the forked end 23 of an arm 22 on a member 8 of the line-spacing mechanism, the arrangement being such that the lever 24 is operated at each operation of the line-spacing mechanism. The lever 24 may, if preferred, be operated by hand. The spindle of the ratchet-wheel is provided with pins adapted to engage recesses in the hub of the spool 18, and is mounted in a forked member 30 which is pivoted at 26 to the platencarriage and can be turned upwards to uncouple the spool.