baber/WOPTO huggingface dataset:
Patent GB-1524003-A (GB)
Title: Coal cutter drums
IPC: E21C25/10
Filed: 1977-06-15
Abstract: 1524003 Mineral-mining cutter drums HEELEY (MINING MACHINERY) CO Ltd 15 June 1977 24943/77 Heading E1F A coal cutter drum comprises a central member 1 of square cross section with a first flange portion 2 on each side extending in both directions from a central boss 3, and four segments 4A, 4B, 4C, 4D extending longitudinally of the drum and carrying pick boxes 5. Each segment comprises a pair of second flange portions 6A, 6B perpendicular to each other and each of a width substantially equal to half the width of a flange portion 2, a pair of third flange portions 7A, 7B extending perpendicular to each other and perpendicular one from each of the remote side edges of the second flange portions 6A, 6B with the angles between the respective second and third flange portions facing oppositely to the angle between the second flange portions 6A, 6B, and a part cylindrical drum portion 8 extending between the remote side edges of the third flange portions 7A, 7B. Each flange portion 2, 6A, 6B, 7A, 7B is provided with holes 9 for bolts 10 for securing the segments to the central member 1 and to each other with the drum portions 8 of the segments together forming a cylindrical cutting surface.
Patent GB-1038990-A (GB)
Title: Improvements in or relating to transistor oscillators
Inventor: KITCHIN HARRY DONALD
IPC: H03L5/00
Filed: 1963-06-24
Abstract: 1,038,990. Automatic voltage control. MARCONI CO., Ltd. April 28, 1964 [June 24, 1963], No. 24961/63. Heading G3R. [Also in Divisions H2 and H3] A transistor oscillator suitable for use in an amplitude stabilized RF type EHT generator has in its feedback path a parallel tuned collector circuit feeding an L.C. circuit at the base and the amplitude of oscillation is controlled by varying one of the reactive components of the feedback path. Fig. 5 shows an oscillator the frequency of which is determined by the tuned collector circuit 2<SP>1</SP>, 3<SP>1</SP> and the feedback circuit 8, 9. Choke 10 isolates the biasing circuit and blocking capacitor 9 serves also as a reservoir capacitor for oscillations rectified at the base. A D.C. output is obtained at 0 and a part of the A.C. output it also rectified at 13 and applied via a transistor amplifier 14 to control the saturation of the core of inductor 8 so as to maintain the oscillation amplitude constant. It is explained that this is effected without appreciably changing the frequency of oscillation.
Patent GB-819211-A (GB)
Title: Improvements in linings for mine galleries
IPC: E21D11/08
Filed: 1956-08-15
Abstract: 819,211. Slabs for lining mine galleries. LINSINGEN, M. VON, [trading as BOCHUMER EISENHUTTE HEINTZMANN & CO.]. Aug. 15, 1956 [Aug. 16, 1955], No. 24983/56. Class 87(1) Concrete slabs 1 for lining mine galleries are encased in thin sheet metal or synthetic plastic material 2 and are connected together so as to yield parallel to the gallery walls. In one form, Fig. 2, a slab is provided with a tongue 5 and a groove 4 within which is a yielding wooden block 6. In a modification, Fig. 3, a slab is provided with a wedge-shaped tongue 7 and a corresponding groove 8 within which the metal &c. casing is corrugated at 9. In a further modification, Fig. 5, sand &c. 11 is provided between a yieldable corrugated metal &c. casing 2 and the slab 1, a tongue 12 and yielding groove 13 being provided on the casing 2. In another form, Fig. 8, inner and outer slabs 1, 1a are connected by flexible metal flanges 17, 16 on the casing 2, 2a. The slabs may be of pumice or ash concrete and may be reinforced.
Patent GB-1157604-A (GB)
Title: Rotary Tools.
Inventor: BROOKMAN DAVID STANLEY
IPC: B23B47/22
Filed: 1966-06-04
Abstract: 1,157,604. Drilling machines; dashpots. R. S. BROOKMAN Ltd. 23 May, 1967 [4 June, 1966], No. 24989/66. Headings B3B and B3C. A rotary drill is advanced by a pneumatic piston and cylinder mechanism which may be attached to or may form part of the tool. A drill head 22, Fig. 1, is non-rotatably slidable in a cylinder 21, and a piston 15 is secured to the head. A rod 8 passes through the piston, a spool valve 1, and a plug 2, and carries a valve 71 which co-operates with a seat 73. The drill chuck 28 is rotated by an epicyclic gear train 30, 31 driven by an air motor 39, 42. A plug 3 is provided for the attachment of a control device for cutting off the air supply. In operation, air is supplied from a junction block 66, through a conduit 57, and thence to the motor, and also over the open valve 71, along rod 8, to the lefthand side of piston 15. Spool valve 1 is forced against a spring 17, and closes exhaust parts 77. The drill is rotated, and is advanced, until a nut 20 on rod 8 engages a plate 4, and valve 71 is seated on its seat 73. The pressure on the ends of valve 1 equalizes, and spring 17 opens both sides of piston 15 to exhaust, whereupon spring 18 returns the assembly to the position of Fig. 1, except that valve 71 remains closed. In a modification, plate 4 is replaced by a ring 81, Figs. 2 and 3, secured to a coupling 85 to which is connected at 95 a pilot valve 100 having a sensor 143, Fig. 4. A sleeve 87, Fig. 3, carries a rod 101 of a valve 121, which provides a dash pot arrangement. A cone 93 is secured to rod 8, and co-operates with sensor 143, when the rod, and therefore the drill head, is retracted, so that air supplied through an inlet 133 of pilot valve 100 passes through the now open ball valve 139 and out of passage 145, whereupon it actuates a valve 150, which controls a further cycle of operations.
Patent GB-520426-A (GB)
Title: Improvements in and relating to noise limiting circuits for carrier wave communication systems
IPC: H03G11/04
Filed: 1938-08-26
Abstract: 520,426. Wireless receiving apparatus. THORNTON, A. A. (Philco Radio & Television Corporation). Aug. 26, 1938, No. 25115. [Class 40 (v)] A noise reduction system comprises a pair of reversely connected rectifiers with a common load impedance and means to apply a delay voltage dependent on the strength of the incoming signal to one of the rectifiers to render it inoperative until the amplitude applied exceeds the delay voltage. The Figure shows a diode detector 10 and load resistance 4, 5 with a shunt diode 17 for amplitude limitation. The delay voltage on the diode 17 is determined by the resistances 8, 9 and varies with signal strength since diode 16 controls the bias of the triode 11. Manual adjustment of the limiting level is effected by potentiometer 21 ; a non- linear element 19 such as a small tungsten filament lamp serving to compensate for supply voltage fluctuations. In a modification, Fig. 2 (not shown), the signal detector load is arranged to vary the bias of the triode which gives automatic adjustment of limiting level in accordance with signal strength. The coupling condenser 15 feeding the auxiliary diode 16 is preferably small so as to pass only carrier frequency and not cause detector distortion. If this condenser is made large the control will depend both on the average carrier amplitude and on the percentage of modulation.
Patent GB-1168315-A (GB)
Title: Substituted 3,4-Dihydro-2H-Pyrans
IPC: C07D309/22
Filed: 1967-05-31
Abstract: 1,168,315. Substituted dihydro-2H-pyrans. MERCK & CO. Inc. 31 May, 1967 [3 June, 1966], No. 25138/67. Heading C2C. Compounds of Formula I wherein R is alkyl ; trifluoromethyl substituted alkyl; mononuclear aryl, aryloxy, or arylthioalkyl; or cycloalkyl; R<SP>1</SP> is hydrogen or deuterium; R<SP>2</SP> is a phenylene or naphthylene radical either of which may be substituted by one or two similar or dissimilar halogen atoms, alkyl, alkoxy or trifluoromethyl radicals, with the proviso that there is a hydrogen atom on at least one of the carbon atoms adjacent to the point of attachment of the phenylene or naphthylene radical to the carbonyl and pyran ring respectively; and n is 1-3 or the non-toxic pharmacologically acceptable salts, esters and amide derivatives thereof are prepared by (1) dimerization of the appropriate [(2-methylenealkanoyl)aryloxy]alkanoic acid or ester or amide derivative thereof by heating; (2) heating an appropriate [(2 - secondary - aminomethylalkanoyl)aryloxy]alkanoic acid or an acid addition salt thereof at or above its melting point; (3) treating an appropriate 2,5-disubstituted-2- (hydroxyaroyl) - 6 - (hydroxyaryl) - 3,4 - dihydro- 2H-pyran with a haloalkanoic acid or esterified derivative thereof in the presence of a base and when using the free acid, converting the so formed salt to the free acid; and (4) hydrolysing a 2 - (alkoxycarbonyl - alkoxyaroyl) - 6 - (alkoxycarbonylalkoxyaryl) - 3,4 - dihydro - 2H- pyran or the corresponding amide derivative to the desired carboxylic acid product. The intermediate [(2-methylenealkanoyl)aryloxy]-alkanoic acids and their ester derivatives and the ([2 - (secondary - amino - methyl) - alkanoyl]- aryloxy)alkanoic acids and their acid addition salts are prepared by treating an alkanoylaryloxyalkanoic acid with formaldehyde or paraformaldehyde and the acid addition salt of a secondary amine followed where appropriate by decomposition to the first named class of intermediates by heating in a solvent such as dimethylformamide. Pharmaceutical compositions comprise a compound I together with a suitable carrier or diluent and are effective as inhibitors of lactic acid dehydrogenase and tumour glycolysis and as anti-inflammatory agents.
Patent GB-618500-A (GB)
Title: Improvements in and relating to band brakes
IPC: F16D49/10
Filed: 1945-09-28
Abstract: 618,500. Band brakes. SELF-CHANGING GEAR CO., Ltd., WILSON, A. G., and MILLER, A. A. Sept. 28, 1945, No. 25261. [Class 103 (i)] Band brakes of the type comprising at least three brake bands disposed side by side and in which the application force is applied to one end of one of the bands, the reaction end thereof being coupled to the application ends of the other bands, termed secondary bands, the reaction ends of the secondary bands are connected to means for transmitting the reaction equally and in the same sense to the bands at the opposite side of a diametric plane of the brake drum in such a manner that the moments of the forces acting about the drum axis are substantially balanced. The brake drum is thus relieved of any translatory force. According to Figs. 1, 2, the complete band comprises a primary section 4 extending clockwise from a lug 7 to the point 8 where it is forked to form a pair of secondary sections 5, 6 extending on either side of the section 4 to lugs 11, 11a. Equalizing levers 16, 19 fulcrummed to lugs 14, 18 are interconnected at 20 and at their ends 22, 30 to links 21, 29 connected also to the lugs 11, 11a, on the ends of the band sections 5, 6 and to lugs 12 at intermediate points thereof. The brake is applied by a bell-crank lever 36 connected at 35 to a thrust rod 34, at 37 to the link 21 and at 58 to a link 39 extending to the lug 7 on the end of the primary band section 4. To compensate for wear of the band, the links 21, 29 have arms 24, 31 arranged to engage with lostmotion, devices 26, 33 which frictionally engage the levers 16, 19. Each lever comprises a pair of parallel plates and the devices 26, 33 may comprise a length of helical spring compressed between them. The band is thus supported in release by the links and levers with a constant clearance which is maintained by the movement of the devices 26, 33 with respect to the levers when the band is applied, if wear takes place. The band is positioned and guided by T-section members 41, 42, which bridge the band sections 5, 6 and engage in slots in a lug 44 on the casing 3. Similar members 46, 47 bridge the sections 5, 6 at the lower part. The normal direction of drum rotation is counter-clockwise. The brake is less effective with reverse rotation. In a modification, Fig. 4, the application force is applied by a pullrod 54 acting through a floating lever 55, a lever 56 fulcrummed at 58 and links 59, 61 connected to the end of the band section 4 and to an intermediate point thereof. The brake band may have more than three laps. The Provisional Specification states that the brake may be used in multi-speed epicyclic gear boxes. Specifications 424,635 and 618,582 are referred to.
Patent GB-527691-A (GB)
Title: Improvements in or relating to electrical apparatus
IPC: H05K1/16
Filed: 1939-09-07
Abstract: 527,691. Radio-receiving and other electrical apparatus ; casting composite articles. PHILIPS LAMPS, Ltd. Sept. 7, 1939, No. 25269. Convention date, Sept. 6, 1938. [Class 83 (i)] [Also in Groups XXXVI, XXXVII and XL] A radio-receiving or other electrical apparatus made as in Specification 515,354, has at least one guide member 24, Fig. 5, die-cast on the insulating plate 1. The member 24 is secured by a cast edge 28 and guides a ceramic shaft 20 which may rotate or move axially or both and may carry an electrode 21 of an adjustable condenser which is connected by a flexible wire 22 to the die-cast conductor system 2. The bush 24 may be split and have a spring ring 26 to prevent accidental movement of the shaft 20. In another form a switch comprises an insulating strip 5, Fig. 1, having metal strips 6, 7 adapted to engage contact springs 8, 9, 10 connected to the system 2. The strip 5 is guided and limited in its movement by die-cast members 11, 12 engaging holes in the plate 1, which may be roughened or have conical ends 14, Fig. 3, or enlarged heads 16, Fig. 4, may be cast on the opposite side of the plate 1.
Patent GB-1375468-A (GB)
IPC: B01D17/02
Filed: 1972-05-30
Abstract: 1375468 Breaking emulsions CHISSO ENG CO Ltd 30 May 1972 [27 May 1971] 25312/72 Heading C1C A method of breaking an oil-in-water emulsion comprises rapidly reducing the pressure on the emulsion to a value from 300 to 152,000 mm. of Hg below the saturated vapour pressure thereof, to cause the autogenous evolution of bubbles in the emulsion. The emulsion may be injected through an orifice maintained at the above reduced pressure in respect of the saturated vapour pressure of the emulsion. Alternatively, the emulsion may be heated in a closed autoclave, the pressure within the autoclave being then reduced to 300 to 152,000 mm. of Hg below the saturated vapour pressure of the emulsion. The method may be carried out in the apparatus shown in Fig. 5, wherein emulsion is injected via nozzle 2 into column 1, the pressure in this column being controllably variable by means 6, in association with flow-control valve 7 and vacuum pump 10. On breaking the emulsion, oil droplets ascend the column and are extracted via exit 3.
Patent GB-382990-A (GB)
Title: Method of and device for manufacturing rail chairs for railway sleepers
IPC: B21H7/00
Filed: 1931-09-10
Abstract: 382,990. Making railway permanent way. SOKAL, S., 1, Great James Street, Bedford Row, London.-(Maschinenbau Akt.-Ges. vorm. Ehrhardt & Sehmer ; Saarbr³cken, Germany.) Sept. 10, 1931, No. 25460. [Classes 83 (ii) and 83 (iv).] Punching ; shearing.-Chairs for railways, such as that shown in Fig. 1, are formed from blanks obtained by punching V-slots Z in a channel section, and separating the blanks by slots Y. The blanks may be forged to their final form in a press as described in Specification 379,662. The channel section work m is supported on a base n and is held thereon by members o. A punch g is driven by cams l, l<1> working between rollers u, u<1> carried on a slide x which is urged against a stop v on the punch by a spring y. As the shaft f and cams l, l<1> rotate the punch severs a portion from one side of the work, when a wedge p moves down between the slide x and stop v so that on further rotation of the cams the punch is in position to punch the second side. The slots Y are formed by a tool h, Fig. 11, on an arm q operated by a cam k on the same shaft f as the cams l, l<1>.
Patent GB-887011-A (GB)
Title: Glycyrrhetinic acid derivatives
Inventor: GOTTFRIED SIEGFRIED
IPC: C07C61/28
Filed: 1959-07-24
Abstract: The invention comprises glycyrrhetinic acid derivatives of the general formula <FORM:0887011/IV (b)/1> in which A and B and/or C and D can together represent a further bond and X is hydroxy, ethinyl or acyloxymethyl and in which rings Y and Z are cis- or trans-relationship, together with their preparation by brominating the corresponding 3,11-diketo-18a - or 18b -olean-12-ene 20-carboxylic acid to give the corresponding 2-bromo or 2,12,13-tribromo compound, dehydrobrominating to the corresponding 1,12-diene or 1,12,18-triene, and then, if desired, forming the acid chloride and converting it into the corresponding ethinylcarbonyl or acyloxyacetyl derivative.  The latter steps are carried out by treatment with thionyl chloride or oxalyl chloride to form the acid chloride, followed by reaction with sodium acetylide to form the ethinylcarbonyl derivatives, or with diazomethane followed by acid treatment of the resulting diazoketone to give the acyloxyacetyl derivative.  Detailed examples are given.  Specifications 798,655, 843,132, 843,133 and 843,137 are referred to.
Patent GB-171538-A (GB)
Title: Improvements in hooks for haulage and like purposes
IPC: F16B45/02
Filed: 1920-09-07
Abstract: 171,538. Thackeray, H. J. Sept. 7, 1920. Hooks, spring, safety, and closed.-A hook 1 for use with colliery corves &c. is bifurcated at its free end to house a pivoted T-shaped catch 4 which closes the hook in the operative position The head 5 of the member 4 forms a stop limiting the position of the member 4, and a cover for the free end of the hook when the member 4 is housed in the bifurcations. In a modification, the free end of the hook is slotted laterally to accommodate a pivoted catch, the movement of which is limited by the shoulder of the hook. A spring tending to keep the catch in the operative position may be fitted.
Patent GB-374343-A (GB)
Title: Improvements in liquid and friction shock absorber for automobiles
IPC: F16F7/02
Filed: 1931-09-14
Abstract: 374,343. Shock-absorbers. DUFAUX, A., 87, Rue Baudin, Levallois Perret, Seine, France. Sept. 14, 1931,.No. 25748. Convention date, Oct. 31, 1930. [Class 108 (iii).] The vertical movements of the frame of a vehicle are controlled at low speeds by an hydraulic damper and at high speeds by apparatus employing solid friction, a valve being provided by means of which the pressure produced in the hydraulic apparatus may control the operation of the frictional apparatus. Oscillatory movements of the operating spindle 2 may be restrained by a rod 14 connected to the piston 15 of the hydraulic apparatus, or by friction between the several discs 3, 4 which are forced into contact with one another by a projection 7 on a lever 5 held in its operative position by a spring 8. The tension of the spring 8 may be regulated by a nut 9 and a screwed rod 10 arranged on one side clear of the hydraulic cylinder 16. When the hydraulic apparatus is working, the control valve 23 is closed and the cylinder 16 communicates with the reservoir 1, in which the apparatus is located, through spring-controlled valves 27. A valve 18 connects the cylinder 16 with a cylinder 17 and the pressure on the piston 19 enables it to overcome the pull of the spring 8 and thus render the friction apparatus 3, 4 inoperative. When the valve 23 is open, as shown, the pressure in the cylinders 16, 17 is negligible and the spring 8 then brings the frictional apparatus into action. The valve 23 is controlled by an arm operated mechanically or electromagnetically.
Patent GB-872559-A (GB)
Title: Improvements in windscreen wiper motors
Inventor: OISHEI JOHN ROFFO
IPC: F01C9/00
Filed: 1957-08-15
Abstract: 872,559. Semi-rotary engines. TRICO PRODUCTS CORPORATION. Aug. 15, 1957, No. 25806/57. Class 110 (2) A windscreen wiper motor in which a body 1 clamped between end-plates 2, 3 forms a chamber 5 housing. an oscillating vane 6 mounted on a shaft 7 is provided with a pressure operated shuttle valve 21 for driving the vane, a pilot valve 38 operated by the shaft 7 to supply pressure to the shuttle valve and a control valve 16 having two operative positions, one for supplying pressure to the shuttle valve and pilot valve and the other position for parking the vane, means also being provided for damping movement of the vane 6. Grooves 8 are formed in the vane for holding sealing oil. The shuttle valve chamber 10 communicates with chamber 5 through combined inlet and outlet ports 11, 12 respectively, on opposite sides of the vane 6. Port 12 communicates with the control valve chamber 9 through a valve seat 13 and adjoins a port 14, which can communicate with the port 12 through a recess 15 in the control valve 16, which can be slid along seat 13 by means of a push-pull flexible member 17 and has a port 18 which can be brought into register with a port 19 leading into the chamber 10. Fluid under pressure is supplied through a conduit 9<SP>1</SP> to the chamber 9 and thence through the port 19 to the shuttle valve 21 when the control valve 16 is in the running position. The valve 21 has heads 22, 23, to which pressure is alternately applied through ducts 30, 31, and intervening lands defming exhaust recesses 24, 25 and a medial recess 26 which is always under pressure when the valve 16 is in the running position. Supply port 19 communicates directly with port 11 through recess 26 for one position of valve 21 and in the other position communicates indirectly with the port 12. The ducts 30, 31 open through a valve seat 34 near exhaust ducts 35, 36 and are alternately joined to exhaust by one of two recesses 37 in a pilot valve 38 pivoted on the shaft 7 and rocked by a kicker 39 engaging alternately shoulders 40, 41 on the valve 38. The ducts 35, 36 lead through a passage 28 to the outlet conduit 42. To park the wipers the valve 16 is pulled from the running position to bring ports 44, 45 into register with exhaust duct 36 and port 12, respectively, fluid ahead of the piston 6 being displaced through port 11 or through port 19. A spring 47 is provided to return the valve 16 to the neutral position, when the pull on the valve is released, where the ports 18 and 45 are blocked to cut off the pressure in chamber 9 from the motor. A throttle valve 53 damps the motion of the piston as it nears the end of its stroke by restricting the ports 11, 12, 15 and 14 when they are exhausting. The valve 53 is yieldingly mounted on the piston to allow a quick reversal of pressure.
Patent GB-500986-A (GB)
Title: Improvements in electric cables
IPC: H01B9/06
Filed: 1937-09-23
Abstract: 500,986. Cables. SIWECKI, W. Sept. 23, 1937, No. 25824. Convention date, June 22. (Class 36] A cable comprises a conductor 1 surrounded by layers 2, 3, 4 of impregnated solid.insulation, such as paper, separated by distance pieces 5, 6 of solid insulating material such as rolled impregnated paper. The spaces between the distance pieces, which are preferably helically applied, are filled with oil.
Patent GB-483734-A (GB)
Title: Improvements in or relating to thermionic amplifier circuits
IPC: H03H7/01
Filed: 1936-09-24
Abstract: 483,734. Impedance networks. PERCIVAL, W. S. Sept. 24, 1936, No. 25902. [Class 40 (iii)] In a band-pass filter comprising tuned circuits C4, L4; C1, L1 ; C2, L2; and 03, L3, Fig. 2, and in which the capacities C4, C2 are the anode-cathode and grid-cathode inherent capacity of two valves, the inductance L2 forms an auto-transformer so that inductances L1, L3 may be reduced in value and their self-capacities made less serious, while the leakage inductance of the auto-transformer is compensated by the mutual inductance M between I and L3. The network of Fig. 2 is equivalent to that of Fig. 3, in which the auto-transformer L2 is replaced by the shunt inductance L<1>2 and the leakage inductance l. By coupling L1, L3, their mutual inductance may be made to be equal and opposite to the leakage inductance l, and the network becomes that shown in Fig. 4. Specifications 475,490 and 483,732 are referred to.