baber/WOPTO huggingface dataset:
Patent GB-631916-A (GB)
Title: Improvements in connection with photo-copying machines
IPC: G03B27/22
Filed: 1947-09-05
Abstract: 631,916. Photographic contact-printing apparatus. HALL, HARDING, Ltd., BUNGAY, J. A., and FAUX, F. G. Sept. 5, 1947, No. 24521. Drawings to Specification. [Class 98 (ii)] In photographic contact-printing apparatus of the type in which the original and the photographic sensitive material are passed between a rotatable transparent cylinder enclosing a light source and an endless band, the cylinder is rotated at a speed different from that of the endless band to prevent imperfections in the cylinder being recorded on the sensitive material.
Patent GB-1020632-A (GB)
Title: Magnetic storage apparatus
IPC: G11C8/00
Filed: 1962-06-26
Abstract: 1,020,632. Magnetic recording on films. SPERRY RAND CORPORATION. June 26, 1962 [July 10, 1961], No. 24549/62. Heading G5R. [Also in Divisions H1 and H3] Binary information is recorded on a moving magnetic film 48 (Fig. 4) which is of single domain thickness and has a transverse easy direction of magnetization 50 by means of a device 58 (Fig. 5) carrying an information conductor 54 and a cross-field current conductor 56 arranged close to the film with the conductors 54 and 56 positioned as shown in Fig. 4. The binary information signals, which are fed in sequence into conductor 54, are each enabled to saturate an area of the film magnetically in a transverse direction depending on the information (such as 64, 66, 68) by the assistance of a short coincident pulse in conductor 56. To read out the information stored, current is applied to the cross-field conductor 56 which partially rotates the magnetic vectors of the saturated areas, producing pulses of corresponding polarity in conductor 54 which is connected to a sensing circuit.
Patent GB-883309-A (GB)
Title: Lawn edge trimmer and roller
IPC: A01D34/84
Filed: 1959-07-17
Abstract: 883,309. Edge-trimmers; rollers. HANCOCK, W. S. Oct. 4, 1960 [July 17, 1959], No. 24555/59. Classes 6(1) and 6(2). [Also in Group XXV] A combined edge-trimming and rolling device comprises a rolling appliance having two rollers 5, 5x as illustrated in Fig. 1, and an edge trimming device detachably connected to the stub shaft 10 of an adapter 9 bolted to the outer end of the roller 5x. The roller may therefore be used either with or without the edge-trimmer. The edge-trimmer comprises a casing 13 formed with a vertical cutting edge 14 and bearings 17, 18 for the spindle of a rotary cutter 15. Secured to the casing 13 is a sleeve 24 housing a stub shaft 21, and adapted to be slid over the stub shaft 10 until the latter is keyed to the shaft 21 at 23. Thus as the roller rotates, the cutter is driven from the shaft 10 by means of intermeshing bevel gears 19, 20. The sleeve 24 is held in position on the shaft 10 by means of a spring- loaded pin 25 engaging in a groove 11 in the shaft, the pin being formed with a recess 27 which, under the action of a spring 28, normally faces away from the shaft 10. On turning the pin through 180 degrees, the recess 27 may be passed over the stub shaft 10 and the edgetrimming attachment may be separated from the roller. This form of fastening mechanism enables the sleeve 24 to remain rotatable relative to the shaft 10, and the cutting attachment may therefore swing rearwards on encountering an obstruction. As disclosed in the Provisional Specification, the device comprises a rotary disc fitted with a number of cutting blades, co-operating with two, spaced fixed blades, and may be provided with a grass box, or with a ploughshare for turning the trimmings in to the sail.
Patent GB-790466-A (GB)
Title: Improvements in shuttering
IPC: E04G17/04
Filed: 1956-08-10
Abstract: 790,466. Shuttering. AFRICA GENERAL CONSTRUCTION, Ltd. Aug. 10, 1956 [Aug. 15, 1955], No. 24597/56. Class 20(2) A shuttering panel 1a comprises a channel member the side flanges 3, 4 of which are spanned by tubular struts 7, the side flanges being apertured coaxially with the struts at 8 so that in use the panels may be connected side by side by rods 12 secured by nuts 8 or collars 15. Bearing collars 9 are provided on the base 2 of the channel members, having their axes disposed at right angles to the axes of the tubular struts 7 and the base of the channels are apertured coaxially with the collars 9 so that the rods 12 may be introduced into the collars 9 in order to connect, panels at right angles to each other. The struts 7 as a group are offset in one direction along the length of the channel and the collars 9 as a group are offset by the sme distance in the opposite direction so that panels connected at right angles can be aligned by inverting one of the panels relative to the other. The channels may be closed by end flanges 5, 6.
Patent GB-766380-A (GB)
Title: Improvements in or relating to cyanine dyestuffs
Inventor: KENDALL JOHN DAVID
IPC: C09B23/02
Filed: 1954-08-24
Abstract: 5 - Methyl - 3 - mercapto - 4 - phenyl - 4 : 1 : 2-triazole is prepared by refluxing 1-acetyl-4-phenylthiosemicarbazide in ethanol with sodium.  The corresponding 3-methylthio- and 3-ethylthio-derivatives are prepared by dissolving the mercapto compound in aqueous sodium hydroxide and adding methyl or ethyl iodide.  3 : 5 - Dimethyl - 4 - (p - methoxyphenyl)-4 : 1 : 2 - triazole is prepared by heating 2 : 5 - dimethyl - 1 : 3 : 4 - oxadiazole with p-anisidine on an oil bath at 140 DEG  C.  The corresponding 4 - (p - chlorophenyl), 4 - (o - tolyl), 4 - (m - tolyl) and 4 - phenyl derivatives and 4 : 5 - diphenyl - 3 - methyl - 4 : 1 : 2 - triazole are similarly prepared.  Quaternary salts of the above triazoles are prepared by heating the bases with methyl iodide. 1 - Acetyl - 4 - phenylthiosemicarbazide is prepared by mixing 4-phenylthiosemicarbazide and acetic anhydride.  Specification 743,133 is referred to.ALSO:Cyanino dyes of the general formula:-<FORM:0766380/IV(b)/1> <FORM:0766380/IV(b)/2> wherein R1 and R4 are lower alkyl groups ("lower" meaning up to four carbon atoms), R2 is a lower alkyl, aryl or thioether group, R3 is a phenyl or naphthyl group or such a group containing a lower alkyl, lower alkoxy or halogen substituent, X is an acid radical, m and n are 0 or 1, D1 completes a heterocyclic nucleus and D2 completes a heterocyclic nitrogen ketomethylene nucleus, are made by reacting a triazole quaternary salt of the formula:- <FORM:0766380/IV(b)/3> with a compound of the formula:- <FORM:0766380/IV(b)/4> wherein Q is -SR, -CH=CH-SR (R being alkyl, aryl or aralkyl) or an acetanilidovinyl group, or with a compound of the formula:- <FORM:0766380/IV(b)/5> wherein R5 is a lower alkyl group, the reactions being carried out in the presence of an acid binding agent.  In the examples, R3 is phenyl, p-methoxyphenyl, p-chloriophenyl or o-tolyl, R2 is methyl, methylthio, ethylthio or phenyl, D1 completes or benzthiazole, benzoxazole, 3, 3-diimethyl-indolenine or 4-, or 2- quinoline nucleus and D2 completes a 3 - ethyl - 2 - thio - thiazolid - 4 -one or 1 : 3 - dimethyl-2 - thiohydantoin nucleus.  The Provisional Specification defines the various symbols R in wider terms. Specification 743,133 is referred to.
Patent GB-1427222-A (GB)
Title: Plug-in adapters for electrical current distributing track members
IPC: H01R25/14
Filed: 1973-05-23
Abstract: 1427222 Two part coupling ERCO-LEUCHTEN GmbH 23 May 1973 24625/73 Heading H2E A fused plug unit mounted above an electrical ceiling fixture to couple it to a ceiling-mounted wiring track (Specification 1,427,221) comprises an insulating body 96 holding a cartridge fuse 166 in contact clips 138, 143 in an upper cavity 97 under a hinged cover-plate 121, recessed in the top of the body 96, one clip 138 extending upward to form a contact blade 139 to enter the track, the other clip 143 extending downward into a shallow wiring cavity on the under side of the body 96, while contact blade 133 in the other side of the circuit passes directly from the wiring cavity to the upper surface. Round the insulating body 96 two spring strips 151 carrying finger pieces 165 are clipped, tabs 153 on each limiting the movement of the other, and are secured by screws 156 passing through body 96 and insulating plate 87 into tapped holes 78 in base-plate 76. Wires 137, 145 from the wiring cavity pass through holes 84 in the insulating plate 87, down conduit 79 to the appliance screwed on end 80. The contact blades, equally offset on either side of the longitudinal centre line, touch the track conductors after latches 160 touch the track walls to act as grounding contacts. On complete insertion, detents on latches 160 enter grooves in the track walls, releasable by displacing the finger pieces.
Patent GB-218165-A (GB)
Title: Improvements in and relating to merry-go-rounds
IPC: A63G1/24
Filed: 1923-10-03
Abstract: 218,165. Reagen, G. M., and Wohl, J. I. Oct. 3, 1923. Cylindrical journal bearings.-A bearing comprises a block 55 and a cap 56 which are held together on assembly by a. tapered rib 61 and groove 62 and by an oppositelytapered pin 64. Ribs 65 prevent spreading of the cap 56.
Patent GB-532475-A (GB)
Title: Improvements in making of microporous products
IPC: H01M50/414
Filed: 1939-08-29
Abstract: 532,475. Microporous rubber. UNITED STATES RUBBER CO. Aug. 29, 1939, No. 24764. Convention date, Oct. 22, 1938. Addition to 504,549. [Class 70] Microporous bodies, prepared as described in the parent Specification by incorporating silica gel in a solid rubber composition, are treated after manufacture to remove the silica, for example, by washing with alkali or hydrofluoric acid.
Patent GB-597681-A (GB)
Title: Improvements relating to indirectly heated thermionic cathodes
IPC: H01J23/05
Filed: 1945-09-25
Abstract: 597,681. Thermionic valves: BRITISH THOMSON-HOUSTON CO., Ltd., and RUSHFORTH, L. Sept. 25, 1945, No. 24788. [Class 39 (i)] An indirectly heated cathode, particularly for magnetrons, comprises a metal cylinder 1 with an electron emissive outer surface, the ends of which are closed by metal plates 3, 4 to which is attached, preferably under tension, a heating element 2. Both end plates are insulated from the cylinder by flanged ceramic discs 8 which fit into the ends of the cylinder and are carried in flanged metal cups 9 which are spot welded to the discs 3, 4. Metal strips 12 are welded to the cylinder and are bent over to engage the outer surface of the discs, clearance holes being provided in the end plates 3, 4 and the cups 9. Alternatively, where the end plates are to provide the cathode lead as well as the heater leads, one of the plates may be secured and electrically connected to the cylinder by straps 13. The heater element may be connected to the end plates between strips, Fig. 2 (not shown), or by metal tongues, Fig. 3 (not shown).
Patent GB-500745-A (GB)
Title: Improvements in the purification of synthetic methanol
IPC: C07C31/04
Filed: 1937-09-13
Abstract: 500,745. Methanol. JOHNSON, G. W. (I. G. Farbenindustrie Akt.-Ges.) Sept. 13, 1937, No. 24894. [Class 2 (iii)] Synthetic methanol is purified by treatment with a small quantity of chromic acid. The chromic acid in aqueous solution may be added at, a point in a distinction column at which the methanol has a considerable water content. In an example, aqueous methanol containing 40 per cent of methanol (obtained by the action of steam on dimethyl ether separated from crude synthetic methanol) is introduced at the 20th tray of a column of 65 trays and a 2 per cent aqueous solution of chromic acid is introduced at the 27th tray. Specification 311,468, [Class 2 (iii)], is referred to.
Patent GB-599530-A (GB)
Title: Improvements in or relating to dielectric heating apparatus for the high frequency heating of dielectric material
IPC: H05B6/78
Filed: 1945-09-26
Abstract: 599,530. Dielectric heating. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Sept. 26, 1945, No. 24966. Convention date, Sept. 28, 1944. [Class 39 (iii)] Apparatus for heating articles by electrostatic means comprises a valve generator (two triode valves 2, 10, in a push-pull circuit) with anodes 4, 12, coupled direct to a transmission line comprising two long plate-like conductors 22, 24 spaced apart preferably on edge, the conveyer means 54 being arranged to carry the articles to be treated between the conductors. The end of the transmission line formed by conductors 22, 24, is terminated by a shortcircuiting strap 28 or 56, Fig. 3, which is grounded and also carries the positive side of the high-tension D.C. source to the anodes of the valves. A standing voltage wave pattern is formed along the conductors having a voltage node at 28 and a voltage maximum at the anodes of the valves, the physical length of the conductors may be adjusted to match the electrical length at the frequency employed by sliding links 40. The electrical length of the conductors is preferably a quarter, half, or three-quarters of the wave length of the frequency used, and articles to be treated may enter and leave the high frequency field at points of maximum or minimum voltage on the standing wave pattern. The frequency employed may be of the order of 10 megacycles per second but is preferably 20 to 40 megacycles per second. Specifications 567,731 and 599,529 are referred to.
Patent GB-507658-A (GB)
Title: Improvements in methods of making phenol-acetaldehyde condensation products
IPC: C08G8/00
Filed: 1937-09-14
Abstract: 507,658. Phenol-aldehyde condensation products. TRIGGS, W. W. (Ellis-Foster Co.) Sept. 14, 1937, No. 24968. Samples furnished. [Class 2 (iii)] Phenol-acetaldehyde resins are heated to a temperature of at least 180‹ C. in the presence of a small amount of an oxalate or oxalic acid in order to decolourize them. The condensation of the phenol and acetaldehyde is preferably effected in the presence of an acid having a dissociation constant between 2 x 10<-1> and 1 x 10<-3> such as oxalic acid or an acid of phosphorus and the phenol may be pretreated with or treated simultaneously with the condensation with a small amount of an aldehyde of greater molecular weight than acetaldehyde, or with methyl ethyl ketone or a higher ketone or with a diphenylolbutane or other diphenylol substituted hydrocarbon. In examples: (1) cresylic acid is condensed with acetaldehyde in the presence of oxalic acid and the condensate heated to about 200‹ C., the product being heated with tung'and linseed oil and dissolved in naphtha to yield a varnish ; (3) cresylic acid is condensed with paraldehyde in the presence of oxalic acid, heated to 220‹ C., blended by heating with tung oil'and dissolved in naphtha to yield a varnish; (5) a mixture ofm- and p-cresol with dicresylolbutane is condensed with paraldehyde in the presence of hydrochloric and oxalic acids and the condensate heated to 220‹ C. ; (6) xylenol is condensed with paraldehyde in the presence of oxalic and hydrochloric acid and the condensate after having been heated to 230‹ C., is blended with tung oil and dissolved in naphtha to yield a varnish ; (7) xylenol is condensed with a mixture of gaseous acetaldehyde and hydrocarbon gases in the presence of oxalic acid,and the condensate, after having been heated to 210‹ C. is blended with linseed and tung oils and dissolved in naphtha to yield a varnish ; (8) mcresol is condensed with paraldehyde in the presence of a mixture of hydrochloric acid and oxalic acid and the condensate is heated to 210‹ C. Specification 169,347, [Class 2 (iii)], is referred to. Samples' have been furnished under Sect. 2 (5) of products obtained by heating in the presence of oxalic acid condensates of m-, p-cresol and acetaldehyde prepared in the presence of (I) pyrophosphoric acid, and (2) hydrochloric acid.
Patent GB-1468253-A (GB)
Title: Apparatus for optically recording and/or reproducing information signals
IPC: H04N5/85
Filed: 1974-06-05
Abstract: 1468253 Automatic control of focus SONY CORP 5 June 1974 [11 June 1973] 24969/74 Heading G3R In a system for recording and/or reproducing information by means of a light beam focused on the mirror surface of a recording medium, focus is maintained despite lack of flatness in the medium by adjusting it in response to the output of at least two photo-detectors which receive the reflected beam at different positions. Light L1 from a laser 5, modulated at S for recording, is reflected at M through lenses N which focus it on the surface 1a of medium 1. An aluminized glass disc with a  photo-resist coating which is pitted by the beam. As shown, two beam-splitters BS1, BS2 direct the reflected beam L2 on to respective detectors Al, A2. It is explained Fig. 2 (not shown) that if the beam is accurately focused L2 is parallel and the  outputs of Al and A2 will be equal, whereas lack of focus causes L2 to be convergent or divergent, causing the outputs to be different. This difference is used by control means G to correct the focus by moving N1 only or the remaining elements in H while keeping N1 stationary. In an alternative embodiment Fig. 5 (not shown) only one beam-splitter is placed in the main light path; the beam reflected from this passes to a second splitter on to the two detectors which are arranged at right angles to each other. Each detector has an aperture 8 chosen to allow for irregularities in the surface of the medium. The detector outputs may be integrated over a short time to eliminate the effects of information modulation.
Patent GB-779805-A (GB)
Title: Process for the production of artificial threads and films from viscose
IPC: D01F2/10
Filed: 1955-08-31
Abstract: Artificial threads and fibres are produced from viscose of gamma value not below 42 to which has been added shortly before extrusion 0.06 to 0.4, preferably 0.12, per cent by weight (based on the viscose) of a complex compound of the formula [Me(X)6]An, where Me represents Fe, Zn, Cr, Cd or Sn, X represents an alkyl or alkanol amine or aryl amine, and An represents Cl, SO4 or NO3, by extruding the viscose into an aqueous coagulating bath containing 40-65 g./l. of sulphuric acid and 30-50 g./l. of zinc sulphate, and stretching the threads or films so formed by 80-120 per cent in a hot aqueous bath containing 2-10 g./l. of sulphuric acid.  The complex compound may be (1) <FORM:0779805/IV(a)/1> The viscose preferably contains 7-8 and 5-7 per cent of cellulose and caustic soda respectively.  The coagulating bath is preferably at 45-70 DEG  C. and preferably contains 160-260 g./l. of sodium sulphate.  The withdrawal speed is preferably 40-60 m./min. and the length of travel in the bath at least 30 cm.  In the second or stretch bath the products are preferably stretched by 95-100 per cent at a temperature over 90 DEG C.  In an example, viscose prepared from alkali cellulose which has been xanthated with 42 per cent by weight of carbon bisulphide (based on cellulose) and which contains 7.3 and 5.5 per cent of cellulose and caustic soda respectively, is mixed, 5 hours before being spun, with 0.1 per cent by weight of complex compound (1) and spun at a gamma value of 45 into a bath containing 49 g./l. of sulphuric acid, 200 g./l. of sodium sulphate and 39 g./l. of zinc sulphate.  The length of travel of the threads in the bath is 70 cm. and the threads are then stretched 100 per cent in a second bath containing 6 g./l. of sulphuric acid at 90 DEG  C.  The products of the invention have increased strength and elasticity.
Patent GB-426869-A (GB)
Title: Improvements in or relating to contacts for electromagnetic interrupters
IPC: H01H50/74
Filed: 1933-09-11
Abstract: 426,869. Electromagnetic interrupters. HUNTER, S. A., and ARMITAGE, G. H., Springvale Works, West Kensington, London. Sept. 11, 1933, Nos. 25122/33 and 23523/34. [Class 38 (v)] In a vibrating electromagnetic interrupter, in order to prevent breakdown in operation due to the welding of the contacts, an armature, which is rotatably mounted within poles formed in a closed-core electromagnet, is arranged when such welding temporarily occurs, to impart movement to the relatively fixed contact by means of a cam or equivalent, so producing separation of the contacts. As shown in the interrupter trembled blade 10 carries a contact 8 which is adapted to co-operate with a relatively fixed contact 9 carried by a lever 11 pivoted at 12 and urged towards the trembler contact by a blade spring 13. An insulating lead 16 is placed between the pole end of the lever 12 and a cam member 14 which is carried by an armature 2 pivoted in a gap of the core 1. If the trembler contact 8 becomes stuck or slightly welded to its cooperating contact 9 the increase of current in the primary windings of the transformer causes the rotation of the armature 2, the consequent rotation of the cam member 14, causing a rocking of the contact arm 9 which is usually sufficient to separate the contacts and enable the normal operation of the interrupter to be resumed. If, however, a secure welding between the contacts takes place, the greatly increased current in the operating windings causes a large and decided movement of the armature and cam member so that a pin 20 on the latter engages the trembler blade 10 with a sharp blow and a greatly increased separating force for the contacts is thus available.
Patent GB-577850-A (GB)
Title: Means for compensating the differences of thermal expansion of a pipe and its fluid in hydraulic transmission systems
IPC: F16L51/00
Filed: 1939-09-01
Abstract: 577,850. Hydraulic transmission devices. SOC. OLAER. Sept. 1, 1939, No. 25138. Convention date, Dec. 20, 1938. [Class 69 (ii)] To compensate for unequal expansion by heat. of the fluid and conduit in a hydraulic transmission system an additional body such as a wire 2 of diameter D is introduced into a conduit 1, the wire being chosen so as to make the combined expansion of the fluid and wire equal to the expansion of the conduit. Instead of a wire a hollow ball can be used, and a ball 4 of rubber can be introduced into a chamber 5 connected with a conduit 1. The conduit 1 may be protected by a heat-insulating covering.
Patent GB-619067-A (GB)
Title: Improvements in or relating to collar stretching devices
IPC: A41B3/06
Filed: 1946-08-22
Abstract: 619,067. Collar supports. DUNNING, L. T. Aug. 22, 1946, No. 25143. [Class 141] In a collar stretching device of the type having resilient limbs 4, 5 engaging the wings of the collar, the limbs being joined by a central portion 1 provided with a loop 2 engaging the neckband, single or multi-turn coiled springs 8, 9 are provided along the length of the limbs together with coiled springs 6, 7 where the limbs join the central portion and springs 13, 14 at the ends of the limbs. Reference has been directed by the Comptroller to Specifications 376,854, 550,377, and U.S.A. Specification 1,945,422.