baber/WOPTO huggingface dataset:
Patent GB-549533-A (GB)
Title: Improvements in or relating to calculating apparatus
IPC: G06F7/46
Filed: 1941-05-23
Abstract: 549,533. Calculating-apparatus. STANDARD TELEPHONES & CABLES, Ltd. (Bell Telephone Manufacturing Co.). May 23, 1941, No. 6634. Drawings to Specification. [Class 106 (i)] An electrically operated apparatus comprises an operator's control unit and a calculating unit, means for sending signals representing numbers and operation signs, means in the calculator responsive to signals representing a pair of numbers and a combination of operation signs for performing a calculating operation, means for sending the result of the computation to the control unit, and means for returning the operated parts to normal or for retaining one of the numbers as a factor in a further calculation depending on the particular combination of operation signs sent. The control unit comprises a single set of digit keys, a set of control keys for signalling the kind of operation, and a printer by means of which the data and signs submitted to, and the results obtained by, the calculator are recorded on a tape. The calculator comprises circuit arrangements including sets of relays, step by step switches and resistances. The Specification describes the sequence of operations in the performance of multiplication. In the arrangement described the first factor is set digit by digit, the multiplication key (X) is then depressed, the second factor is then entered in a similar manner and the various higher and lower partial products are accumulated and finally the equals key (=) is depressed. The resulting product is then transmitted to the printer and the operated parts restored. If it is desired to retain the first factor for a subsequent calculation a repeat key (R) is depressed instead of the multiplication key (X) and that factor is stored in the apparatus for further computations. Specification 547,163 is referred to.
Patent GB-1445631-A (GB)
Title: Ceramic material for pyroelectric devices and devices incorporating such material
IPC: H01L37/02
Filed: 1973-02-12
Abstract: 1445631 Ceramic pyrroelectric composition DEFENCE SECRETARY OF STATE FOR 28 March 1974 [12 Feb 1973] 6744/73 Heading C1J [Also in Division H1] A ceramic composition for use in a pyrroelectric device (see Division H1) comprises lead zirconate and lead titanate in solid solution doped with sufficient of a uranium oxide to provide a resistivity times dielectric constant product of between 5 Î 10<SP>11</SP> and 5 Î 10<SP>13</SP> ohm cm. Preferably the mol ratio of lead zirconate to lead titanate is from 60 : 40 to 90 : 10. The uranium oxide may be U 3 O 8  constituting up to 1À5% by weight of the ceramic. After repeated ball-milling in distilled water, sieving, compacting and breaking up of a mixture of PbO, ZnO 2  and TiO 2 , the uranium oxide is added, and after further milling and sieving the powder is formed into sintered discs which may be ground to a desired thickness.
Patent GB-195604-A (GB)
Title: Ratchet-brace
IPC: B23B45/12
Filed: 1923-03-08
Abstract: 195,604. Moser, H. March 30, 1922, [Convention date]. Ratchet braces.-In a self-feeding ratchet brace, a feed nut is rotated intermittently by a pawl and ratchet, the operation of the pawl being regulated by a cam. The tool-spindle b has rotatably mounted thereon a nut d which engages a screw f and is provided with ratchet teeth g,adapted to be rotated by a pawl h on the operating lever a. A nut c, screwed on the spindle to secure the laster to the lever, is formed en its periphery as a cam, which supports the pawl and only allows it to engage the ratchet once in every revolution of the spindle. An anti-friction bearing k prevents rotation of the nut d with the spindle. The Specification as open to inspection under Sect. 91 (3) (a) comprises also an alternative form of the screw f, in which the conical end of the screw is provided with ribs to ensure that it remains stationary. This subject-matter does not appear in the Specification as accepted.
Patent GB-732507-A (GB)
Title: Improvements in or relating to electric impedance networks
Inventor: CATTERMOLE KENNETH WILLIAM
IPC: H01P1/202
Filed: 1953-03-12
Abstract: 732,507. Very-high-frequency filters. STANDARD TELEPHONES & CABLES, Ltd. March 12, 1953, No. 6838/53. Class 40 (8). A very-high-frequency filter comprises a number of coaxial half-wavelength resonators 1, 2, 3, &c.,' each coupled to a transverse structure 10 by means of which connection can be made to a line, in which the distance between the structure 10 and the electrical end 8 of each resonates farthest from the structure 10 determines the mid-frequency of the filter and the distance between the structure 10 and the nearer electrical end 7 of each resonator determines the band width. The electrical ends 7, 8 of either branch of each resonator comprise movable bridges by which the necessary adjustments for band width and mid-frequency, which are interdependent, may be made after the filter has been set. up The frequency-adjusting bridge of the centre resonator may have to be set a little nearer the coupling point than the other bridges. At frequencies below 200 Mc/s. where the size of a half-wavelength resonator is rather large, the length may be reduced by lumped capacitative loading. The coupling between the filter and the line is preferably inductive and consists of a short length of coaxial line or of a conductor 9. The tuning range may be varied by means of interchangeable conductors 9 of different diameters. Below 200 Mc/s. the coupling may be capacitative.
Patent GB-512451-A (GB)
Title: Improvements in or relating to automatic interruptors or current reversers for electro-medical apparatus
IPC: A61N1/32
Filed: 1938-03-04
Abstract: 512,451. Electromagnetic interrupters. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and LAY, A. W. March 4,1938, No. 6896. [Class 38 (v)] An arrangement for periodically interrupting or reversing the current from electro-medical apparatus comprises a condenser C, adapted to be charged at a predetermined rate till the voltage across it becomes sufficient to operate a relay MT, the relay MT then completing at M1 the circuit to a relay MR which operates so as to break at M2 the charging circuit of the condenser, to make at M, a discharging circuit for the condenser and to operate at M4 and M5 contacts which interrupt or reverse the current from IJ to OT. The arrangement is set in operation by closing a main switch S4. The A.C. mains then operate through a rectifier-smoother unit to produce D.C. voltage at the points marked + and - and a circuit is then completed from these points to the condenser C4 through contacts M2 and resistances R1, R2. Relays MT and MR then operate as stated above, the discharging circuit for the condenser being through R3, R4, R5 and M3. When the charge has leaked away sufficiently relay MT allows M, to open and de-energize MR after which the cycle commences again. A hand switch SL according to its position determines whether the current leaving at OT is interrupted or reversed, and switches S2, S, enable extra condensers C1' C2, C, to be inserted in parallel with condenser C4. SL + S3 may be operated together.
Patent GB-239446-A (GB)
Title: Improvements in tennis and similar rackets
IPC: A63B49/00
Filed: 1925-03-14
Abstract: 239,446. Moren, W. G. Wills-. March 14, 1925. Rackets.-A tennis racket comprises metal stringing members mounted on a metal frame 1 which engages a groove in a surrounding wood frame 6, and has prongs projecting into the handle portion of the wood frame. The metal frame is strengthened at the throat portion and filling pieces are inserted where necessary. The frame may be of duralumin and the string- ing of stranded rustless steel wire. The wood and metal frames may be cemented together.
Patent GB-194732-A (GB)
IPC: H02K23/40
Filed: 1923-03-13
Abstract: 194,732. Soc. Anon. Electrolabor, (Assignees of Poirson, E. J. F., and Escouflaire, G. A.). March 13, 1922, [Convention date]. Armatures and field magnets; machines with two or more armatures; homopolar machines.- A self-excited alternator or continuous-current generator, which is particularly applicable for lighting automobiles, railway and other vehicles,. for telegraphy and for kinematographic purposes, comprises a stationary field magnet having a large number of poles excited by a single coil concentric with the shaft, and a rotating armature, enclosed by the field magnet, having a winding of high inductance and low resistance. The field magnet consists of two cast-iron or steel members arranged with the pole-pieces of one member intercalated with those of the other member and enclosing the field-magnet winding. The armature slots are nearly closed. The field winding may be a shunt, series, or compound winding. In the application to kinematographic apparatus, one armature winding e, Fig. 3, supplies continuous current to the field winding B, to the motor m for the film, and to auxiliary lamps l. A second armature winding E supplies alternating current to the incandescent projector lamp L. or where an arc lamp is used it may supply continuous current. In a modification of the machine, the field magnet and armature are constructed with additional magnetic circuits r, s, s<1>, r<1>, Fig. 4, thereby producing a three-armature machine. Specifications 2339/05, 107,005, and 116,891 are referred to.
Patent GB-614638-A (GB)
Title: Improvements in and relating to loudspeaking telephone systems
IPC: H04R1/22
Filed: 1946-03-08
Abstract: 614,638. Telephone sets. RYALL, L. E. March 8, 1946, No. 7301. [Class 40 (iv)] In a telephone instrument comprising a microphone 11 and a loudspeaker 12 mounted in a casing 30, instability and howhng are avoided by mounting the loudspeaker in an inner casing 22 supported within the outer casing 30 by sound insulating material 23. The microphone is secured behind an opening 10a in the outer casing by a spring strip 17, a screw 19 and felt or rubber pads 20, 21. The loudspeaker faces an opening 10b in the outer casing and a corresponding opening 30a may be left at the back of both inner and outer casings. The microphone and the loudspeaker may be interchanged or each may be mounted in a separate inner casing. The effective area of the diaphragm of the loudspeaker is preferably at least one third of the area enclosed by the inner casing at its face adjacent the wall of the outer casing.
Patent GB-545719-A (GB)
Title: Electric wiring system
IPC: H02G3/10
Filed: 1941-06-09
Abstract: 545,719. Electric conductors. O'BRIEN, J. F. June 9, 1941, No. 7302. [Class 36] An electric wiring system comprises conductor units 10 and connector units 12, each connector unit 10 comprising a facing plate 14 simulating a moulding, a backing plate 16, and a pair of spaced conductors 22, which may be tubular, arranged in the channel between them, the connector units 12, which may be provided with outlet means, being adapted to register with the units 10. The conductors 22 are electrically connected by pins 32, and may be spaced by insulation 24 and enclosed in a winding 26 of glass fibre or the like. In a modification, Fig. 5, the backing plate 44 has a bead 46 'for attachment to an anchor 48, and margins 52 of rubber or like material are interposed between the facing and backing plates. In other modifications, for use as chair rails or similar installations, the channel-forming member may be in two portions and may slide on tracks formed by inturned margins of the facing plates.
Patent GB-364423-A (GB)
Title: A process for the cleansing of rags, fibres, cellulosic materials of a like kind and the removal therefrom of rubber, gutta percha, rosins, oils, fats, waxes and like materials
IPC: C08J11/08
Filed: 1931-03-10
Abstract: <PICT:0364423/III/1> Rags and similar cellulosic materials are prepared for use in the manufacture of paper, by first extracting rubber and guttapercha together with other impurities such as waxes, oils, rosin, &c. by treatment with a volatile solvent in a jacketed rotary extractor, from which the used solvent is afterwards withdrawn and recovered, and the cleaned rags &c. are freed from traces of solvent by heating the evacuated extractor and thereafter passing a stream of air therethrough.  The rags are charged into cages rotating on rollers within steam-jacketed drums a, a<1>, Fig. 1, and are treated with volatile solvent passing from a tank f through a pipe g. After extraction, which may be effected under increased or decreased pressure, the saturated solvent passes through a siphon i, and settling tank j, in which heavy impurities are deposited, to a heated still l.  The resulting vapours pass through a pipe m and are partly condensed in the tank f, uncondensed vapours being passed to a condenser o, connected to the tank f through a water trap n<1>.  The rags are then washed with solvent which is drained into a tank p<1>. The washed rags are heated and the resulting solvent vapours pass through a pipe q to the condenser o and tank f.  The final drying is effected by a stream of air admitted through a valve r, and the vapours pass through a pipe t to a condenser u.  The trap n<1> may comprise a chamber n<2>, Fig. 3, with inlets in the lid and floor and an inclined gauze screen n<3> mounted across the chamber on which water is deposited and flows down the screen to an outlet n<4>. Solvents specified are benzene, toluene, solvent naphtha, petroleum benzine, alone or in admixture with carbon tetrachloride, or tetra- or trichlorethylene.  In the case of chlorinated hydrocarbons a small amount of alkali is added.
Patent GB-494395-A (GB)
Title: Improvements in and relating to current limiting devices
IPC: H01H81/04
Filed: 1938-03-10
Abstract: 494,395. Protective cut-out arrangements. BRITISH THOMSON -HOUSTON CO., Ltd. March 10, 1938, No. 7497. Convention date, March 11, 1937. [Class 38 (v)] When the current through the load a exceeds a certain value, an overload switch c is opened by current winding b, thereby inserting an additional resistance d in series with the load, this resistance including the heating element g of a thermally operated switch e with contact f by which the load circuit is opened after a predetermined heating of the element. The switches close when the current fails or the heating element cools. Resistance d may be combined with winding b to assist in holding contacts c open.
Patent GB-550017-A (GB)
Title: Improvements in pillars for use in vehicle bodies
IPC: B62D25/04
Filed: 1941-06-14
Abstract: 550,017. Vehicle bodies. KEEP, T. B. June 14, 1941. No. 7549. [Classes 103 (iv) and 108 (i)] [A]so in Group XXXIII] A pillar for use in the construction of the bodies of motor vehicles, tramcars, railway vehicles and aeroplanes comprises a base from which projects a pair of side wings that diverge throughout the whole or part of their length for the reception of a wooden fillet to which may be secured sheeting forming the external panelling of the body. The pillars may be formed of posts welded together but as shown are formed of a single sheet of metal bent back on itself to form the base 17 and extended normally to provide the posts 19 of the wings the outer posts of which diverge either as at 28, Fig. 1, or 29, Fig. 2, to receive wooden fillet 22. In Fig. 1, stepped blocks 38 are secured to the base 17 and are embraced by a flushing 42. Window panes 33 are fixed by fillets 35 screwed to the blocks 28. In Fig. 2, Z-shaped members 2 are secured to the fillet 22 and bear on the base 17, piping 42 being interposed and a cover strip 24 overlapping the flanges 2b. The window panes are retained by fillets 35 secured by screws 36 that enter hard wood or fibre members 35a. The manner in which the pillars may be used in a vehicle body construction is described in Specification 550,018. Specification 486,245 also is referred to.
Patent GB-844437-A (GB)
Title: Improvements in the production of solid polymers of unsaturated hydrocarbons
Inventor: HARTLEY JAMES
IPC: C08F10/00
Filed: 1959-03-05
Abstract: A process for the production of solid polymers of unsaturated hydrocarbons in which the polymerization is effected in a hydrocarbon or halohydrocarbon liquid medium in the presence of a catalyst consisting of or containing, a halogen compound of a metal comprises adding to the solid polymer, while it is still wet with the liquid medium, a solution of a basic compound of lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc or cadmium in a liquid which is either the same as the liquid medium or is miscible therewith and then removing the liquids from the solid polymer. Specified polymers are of ethylene and propylene, while specified liquids are pentane, hexane, heptane, octane, petroleum naptha, gas oil, benzene, toluene, xylene, cyclohexane, decahydro naphthalene chlorobenzene and -dichlorobezene. Specified basic compounds are oxides, hydroxides and carbonates of alkaline earth metals or magnesium, e.g. calcium carbonate which may be stabilised e.g. by means of calcium alkyl salicylates or calcium naphthenate.  The solutions may be prepared by the processes of Specifications 687,490, 729,376, 742,765, 759,344, 780,058, 780,642, 785,196, 786,167, 789,562, 790,471, 790,473, 795,172, 795,657, and 828,491. Specifications 778,639, 799,392, 799,823, 801,031, 829,628 and German Specification 874,215 also are referred to.
Patent GB-897877-A (GB)
Title: Improvements relating to tractors
Inventor: BOULTON CHARLES DAWSON
IPC: B62D55/10
Filed: 1959-03-05
Abstract: 897,877. Endless track vehicles. PETRIC (IPSWICH) Ltd. May 25, 1960 [March 5, 1959], No. 7694/59. Class 79(1). A unit for attachment to a tractor to provide an endless track in place of each rear wheel comprises a frame for attachment to the back axle and having a bearing surface from which is suspended a further frame for pivotal movement about the axis of the axle, the further frame carrying two rollers about which the endless track passes, and a driving sprocket engaged by the endless track and attached to the vehicle driving shaft. As shown in Figs. 1 and 2, a bracket member 13, 14, 16 is attached to the vehicle axle 10 and supports the further frame 24 upon a bearing surface 22. Split rollers 36, 38 and 39 are mounted in the frame 24, the latter being positionally adjustable by a device 32. The endless track 44 passes over the split rollers and the driving sprocket 40 attached to the vehicle driving shaft. In a modification, Figs. 4 and 6, the bearing frame 50, 51, 52, 55, 56 supports the further frame 74, 64 by its bearing surfaces 60, 61, the further frame carrying split rollers 76, 82, 84, one of which, 82 is adjustable.
Patent GB-378478-A (GB)
Title: Improvements in or relating to alloy steels
IPC: C22C38/40
Filed: 1931-03-13
Abstract: A magnetic steel principally martensitic in structure is obtained from an alloy steel containing over 6 per cent of chromium, 0,5-20 per cent of nickel and not more than 1 per cent of carbon, by alloying with the steel 2,5-8 per cent of aluminium, heating to 1750-2250 DEG  F., and cooling.
Patent GB-752825-A (GB)
Title: An improved method for the preparation of porous objects
IPC: H01M50/414
Filed: 1954-03-17
Abstract: Porous objects such as storage battery separators are made from a mixture of a powdered polyvinyl derivative and an emulsion of a polyvinyl derivative, the welding together of the grains of the powder being carried out by forming the emulsion into a jelly. Specified derivatives are the polymers and copolymers of vinyl chloride and vinylidene chloride.  The powder may also contain a nitrile rubber and the emulsion a plasticizer such as dioctyl phthalate.
Patent GB-634043-A (GB)
Title: Improvements in sliding seats
IPC: B60N2/07
Filed: 1948-03-16
Abstract: 634,043. Sliding seats. COX & CO. (WATFORD), Ltd., and TOON, C. March 16, 1948, No. 7847. [Class 52 (ii)] In a vehicle sliding seat the slides attached to the seat slide on double-tapered rollers e arranged on spindles f in a channel d secured to the vehicle floor at each side. The seat-slide may comprise two angle pieces b, c secured back to back in the bifurcated end of a seat leg a. The sliding portion of the slide is tapered or formed to correspond with the taper of the rollers e. The weight of the seat tends to centralize the slides and prevents jamming.
Patent GB-141884-A (GB)
Title: Ventilation system
IPC: F24F13/20
Filed: 1919-03-29
Abstract: 141,884. Stewart, A. W. March 29, 1919. Forced ventilation.-In a ventilating-system in which the same fan and line of trunking are arranged to supply and exhaust air alternately, the fan casing is movable manually or automatically so as to bring the inlet and outlet alternately opposite the same branch of the trunking. In the apparatus shown, a casing 1 with openings 1<a>, 1<b> is connected to the trunking, and within it the fan casing 2 is rotatably mounted, e.g. on a stub-shaft 4 co-axial with the shaft 5 of the air-impeller 3. The casing turns under the reaction effect of the blast and is arrested after each rotation of 180 degrees, with its inlet and discharge openings 1<0>, 1<d> in operative relation to the openings 1<a>, 1<b> of the trunking, by means of a pawl 6 engaging one of two ratchet teeth 8. A timing-gear for releasing the pawl 6 consists of a series of stepped pulleys 13 connected by belts and forming a reducing-gear from the impeller spindle 5 to a shaft 14, a pulley 15 on which drives a pulley 9 carrying a pawllifter 10. If several branches of the trunking are connected to the casing 1, provision may be made for arresting the fan casing 2 a corresponding number of times.
Patent GB-569137-A (GB)
Title: Improvements in or relating to wooden textile drawing, pressing or the like rollers
IPC: D01H5/74
Filed: 1943-05-19
Abstract: 569,137. Rollers. GOVAN, R. R., and DUFF, J. May 19, 1943, No. 7925. [Class 42 (ii)] A wooden drawing, pressing or like roller, e.g. for a roving frame or other textile machine, comprises a number of pieces cut from a seasoned plank or board and having a dovetail or like groove and projection extending lengthwise on adjacent edges or faces, whereby the pieces can be slid into engagement and held together, the pieces being of such shape that the adjoining edges or faces and the grooves and projections lie radially in the roller. The edges are united by adhesive, the grooves and projections serving to hold the pieces together while the adhesive sets. The roller may be formed of sections 1, Fig. 1, joined by interengaging slots and tongues 3, 4 and united by adhesive. The grain 9 is substantially parallel to the central radius of each sector. In another form, the grain is parallel to an edge radius of each sector. In a modification, the roller may be formed of two halves 10 cut from the end of a seasoned board, Fig. 6, the grain lying substantially parallel to the axis of rotation. This roller may also be built up sectionatly as in Fig. 1.
Patent GB-220674-A (GB)
Title: Improvements in or relating to cabinets for use in connection with wireless receiving apparatus
IPC: A47B81/06
Filed: 1923-03-20
Abstract: 220,674. Graham, E. A. March 20, 1923. Receiving sets, construction of.-A cabinet containing a loud-speaking telephone is provided with movable flaps or extensions a bv which the area of the cabinet top can be increased to enable a portable receiving-set to be supported. The flaps a may normally rest on the top b of the. cabinet, or hang in a vertical plane, and the flap supports c may be hinged or sliding. Four triangular flaps may replace the two rectangular flaps shown. The top b of the cabinet may be mounted on a central vertical pivot, so enabling directional effects to be readily obtained when a set with a built-in loop aerial is supported on the cabinet. The loudspeaker may be arranged in the cabinet as described in Specification 220,675, and audio-frequency amplifiers may also be carried on the cabinet.
Patent GB-919250-A (GB)
Title: Envelope and opening means therefor
IPC: B65D27/38
Filed: 1961-03-06
Abstract: 919,250. Envelopes. SESAME ENVELOPES Ltd. March 6, 1961 [March 7, 1960], No. 7985/61. Class 146 (2). An envelope opening tear strip 6 of poly ethylene, paper or the like is secured in the fold of any flap 2, 3 or 4 by adhesive; it is coextensive with the envelope and the flap is formed with recesses 9 so the strip may be readily gripped for opening.