baber/WOPTO huggingface dataset:
Patent GB-916054-A (GB)
Title: Improvements in electronic bi-stable circuits
Inventor: ALEKSANDER IGOR
IPC: H03K3/45
Filed: 1960-09-01
Abstract: 916,054. Semi-conductor bi-stable circuits. STANDARD TELEPHONES & CABLES Ltd. Sept. 1, 1960, No. 30119/60. Class 40 (6). [Also in Groups XIX and XXXIX] A bi-stable circuit comprises a negative resistance having two stable states of conduction and connected in the output circuit of two transformers having different saturation levels, the arrangement being such that switching pulses of the same polarity fed to the transformers together cause the bi-stable element to switch backwards and forwards between the two states. In Fig. 1 the input pulses are applied to two transformers P1, P2 of which P1 has a greater step-up ratio and a lower saturation value, the two primary windings being connected in opposition. The secondary circuit includes a negative resistance device D, resistance R a bias battery E and an output circuit. The device has stable low and high conducting conditions and when it is in the low conducting condition an input pulse will cause a greater output from P1 than P2 so that the resultant secondary pulse is in the correct sense to trigger the device into a stable highconducting condition. The secondary current which now flows saturates transformer T1 so that the next pulse appears only at the output of T2 and is of such a polarity as to restore the device to its low conducting condition. Similar circuits may be cascaded to form a counting circuit. It is stated that the negative resistance device may be tunnel diode or positive or negative gap diodes of the type described in Specification 686,958, or a transistor arranged to act as a negative resistance device. The different saturation levels of the transformers may result from the use of different cores, different numbers of turns or current or permanent magnet biasing.
Patent GB-554715-A (GB)
Title: Improvements in or relating to apparatus for modulating the frequency of electrical oscillations
IPC: H03C7/02
Filed: 1939-11-16
Abstract: 554,715. Frequency modulation. BLUMLEIN, A. D. Nov. 16, 1939, No. 30182. [Classes 40 (iii) and 40 (v)] Frequency-modulating apparatus for short-wave transmitters comprises a resonant concentric line structure with a diaphragm attached to its inner member so that its effective length may be varied by the signal. The structure, Fig. 1, comprises an outer cylinder 3 connected by an end plate 4 to a central member 5 the position of which is adjusted for tuning by rotating the threaded stem 6 in a fixed nut 7. Rubbing contact between the disc 4 and the stem 5 is provided by a tube 9 and contact members 10. Modulation is effected by varying the effective length of the stem 5 by attaching thereto a sleeve 19, Fig. 2, the end of which is closed by a diaphragm 13. A coil 16 supplied with signal current and moving in the gap of a magnet 17 drives the diaphragm 13 by means of the cylindrical coil support 15. The diaphragm may have a peripheral extension 22 sliding freely over the clamping ring 20. Specification 504,238 is referred to.
Patent GB-1221844-A (GB)
Title: Production of ammonia and sulphur from ammonium sulphites or sulphides
Inventor: DESCHAMPS ANDRE
IPC: C01C1/02
Filed: 1968-06-25
Abstract: 1,221,844. Ammonia and sulphur. INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS. 25 June, 1968 [26 June, 1967], No. 30238/68. Heading C1A. Ammonia and sulphur are produced by contacting ammonium sulphide with sulphur dioxide or contacting ammonium sulphite with hydrogen sulphide in the presence of a liquid phase containing at least 10% of at least one of the following compounds:-(a) a phosphoric acid ester having the formula PO(OR) 3 , where R is a hydrocarbon radical containing 1-20 C atoms or -(R 4 -O) m -R 5 , where R 4  is a hydrocarbon radical containing 2-3 C atoms and R 5  is H or a hydrocarbon radical containing 1-5 C atoms and m is 1, 2 or 3; (b) an alcohol containing 1 to 30 C atoms; (c) a polyol containing 2 to 30 C atoms and 2 to 5 OH groups per molecule; (d) a mono or polyalkylene glycol or esters or ethers thereof.
Patent GB-1372853-A (GB)
Title: Organo transition metal complexes containing a metal-metal bond
IPC: C07F13/00
Filed: 1971-06-28
Abstract: 1372853 Organo-transition metal complexes IMPERIAL CHEMICAL INDUSTRIES Ltd 15 March 1972 [28 June 1971] 30266/71 Heading C2J Polynuclear organometal complexes, particularly #-allyl complexes, of Cr, Mo, W, Mn, Tc or Re which contain a metal-metal bond are prepared by reacting a solution or suspension of an appropriate transition metal compound including at least two metal atoms joined by a metal-metal bond and also including anionic ligands (especially halide, carboxylate or cyclopentadienyl) with a solution of an organometallic compound (especially a Grignard or Li compound) including hydrocarbyl or substituted hydrocarbyl groups. The latter groups may be #-allylic or of formula -CH 2 Y where Y is an atom or group which can interact with the vacant d-orbitals of the metal or is -ZR<SP>1</SP> 3  where Z is C, Si, Ge, Sn or Pb and R<SP>1</SP> is H or hydrocarbyl. In the examples: (1) hexakis (#- allyl) dirhenium (also claimed "per se") is prepared from dichlorodirhenium tetraacetate and allyl MgCl; (2) tetrakis (#- allyl) dimolybdenum is prepared by reacting lithium allyl with (a) Mo 2 (acetate) 4  or (b) MoCl 3  trimer; or by reacting allyl Grignard with (a) Mo 2 (acetate) 4  or (b) Cl 4 ((n-Bu) 3 P) 4 MO 2 ; (3) tetrakis (#-crotyl) dimolybdenum is prepared from Mo 2 (acetate) 4  and crotyl MgBr.
Patent GB-1353708-A (GB)
Title: Cutter for cutting wrappers of foil
IPC: B65B61/06
Filed: 1972-06-28
Abstract: 1353708 Cutting apparatus MULTIVAC SEPP HAGGENMULLER KG 28 June 1972 [4 Feb 1972] 30308/72 Heading B4B A cutting apparatus for cutting foil wrapping material joining packed articles 4 comprises a plurality of straight blades 10, Fig. 4 and arcuate blades 12 mounted in a beam 16 which is mounted in a frame 28, and a counter-pressure plate 22 adapted to be moved by means 23, 24, 25, 26 so as to press the material against the cutting edges of the blades. The straight blades 10 are clamped between plates 11 located in a recess formed in the beam, the arcuate blades 12 being held in the recess by adjustable clamping screws 17a as shown in Fig. 4. The beam is held in the frame by screws 19, 20 which are adjustable so that the beam may be levelled in relation to the pressure plate 22. The pressure plate is raised and lowered by means of a pneumatic ram 26 via gears 24 and links 23. Ejector plungers 33, 34, are mounted in bores 32 formed in the beam. During a cutting operation, the plungers are acted upon by compressed air so that as the pressure plate descends waste pieces of foil (7), Fig. 6 (not shown), are ejected. The ejectors are returned by springs 35, air then escaping from the bores 32 acting to blow the waste pieces from the top of the pressure plate. The cutting apparatus is connected to the output-end of a wrapping machine 2 by means of plates 1, the web of packed articles being separated longitudinally prior to them being separated transversely by the cutting apparatus described.
Patent GB-815442-A (GB)
Title: Improved process and apparatus for manufacturing porous plastic plates
Inventor: RABL RICHARD
IPC: H01M50/42
Filed: 1956-10-04
Abstract: 815,442. Moulding porous synthetic resin battery separators. JUNGFER, L. [trading as AKKUMULATORENFABRIK Dr. L. JUNGFER]. Oct. 4,1956, No. 30319/56. Class 87(2). Porous plates, e.g. battery separators, are moulded by feeding moulds 2 along a conveyer 3, between feed rollers 4 moving more slowly than the conveyer so that the moulds are bunched together beneath a hopper 1, where powdered material e.g. polyvinyl compounds or polycompounds of acrylic or methacrylic acid are fed into the mould. The filled moulds are received by a quickly moving conveyer 5 which separates them and passes them through an oven 6 having four chambers each at a different temperature controlled by a thermostat. The conveyer 5 has holes to allow the underside of the moulds to be heated. The moulds are then fed by a pivoted pawl 31 to a hydraulic press 9. The operation of the pawl 31, (see Fig. 3 not shown) is controlled by a sensing lever 20 which controls an electric motor 21. The press 9 is controlled by a linkage 32 driven by a pin on the lever 31. The press plates are cooled by water flowing therethrough. The moulds are pushed from the press by the succeeding moulds onto a conveyer 10, where the moulded separators are removed from the moulds, the moulds cleaned, and fed onto an elevator 11 which returns them along conveyers 12, 13, 14 and a reversing rocker 15 to the conveyer 3. In a modification the plates may be curved and are slidably guided on the periphery of a drum at the filling station.
Patent GB-665471-A (GB)
Title: Improvements in or relating to heat exchangers
IPC: F25B39/02
Filed: 1948-11-22
Abstract: 665,471. Refrigerating. SAINSBURY. Ltd., J., and HALL, H. R. Nov. 21, 1949 [Nov. 22, 1948], No. 30326/48. Class 29 An evaporator, e.g. for use in a display cabinet for frozen goods comprises a metal panel 1 having on each face a group of dished elements spaced apart, with the elements 2, 2a of one group overlapping the elements 3, 3a of the other group, the panel being provided with fluid inlet and outlet apertures 4, 5 at opposite ends and with aperture 7 in the overlapped areas so that a fluid, e.g. a refrigerant, may be passed in series through the chambers formed by both groups of dished elements. The connecting apertures 7 are small to increase the speed of the refrigerant in passing from one chamber to the next, and so prevent the accumulation, at the lower ends of the chamber, of oil which may be present in small quantities in the refrigerant. The dished elements may be soldered or welded to the panel. A number of panels may be connected in series, Fig. 3 (not shown). According to the Provisional Specification, only one dished element may be provided on each side of the panel.
Patent GB-1514066-A (GB)
Title: Tension-torsion tie bar
IPC: G05G25/00
Filed: 1976-07-21
Abstract: 1514066 Link construction BENDIX CORP 21 July 1976 [26 Sept 1975] 30368/76 Heading F2K [Also in Division B7] The subject-matter relates to an improvement in the laminated tension torsion tie bar of Specification 1,360,780, as used for helicopter rotors, whereby the uneven stress distribution, which normally occurs in service, between the outer edge filaments 26 and central filaments 26 of the belt 24 (Fig. 2) during torsional loading, i.e. twisting of the belt about axis A-A, is largely reduced by convexly forming the belt engaging surfaces 50, 52 of the belt clamps 34, 36 to reduce the initial pre-loaded tensile stress of the belt's outer edge filaments 26 relative the central filaments 26 during initial assembly of the tie-bar, such that in operation under torsional, i.e. twisting conditions of the belt about axis A-A the tensile stress is more evenly distributed between the outer and central filaments 26.
Patent GB-536729-A (GB)
Title: Improvements in or relating to controls for electric current distribution systems
IPC: H01H50/30
Filed: 1940-10-29
Abstract: 536,729. Electric switches. WHIPP & BOURNE, Ltd., and WHIPP, F. Oct. 29, 1940, No. 30371/39. [Class 38 (v)] A vibration-proof switch of the kind having one contact in the form of a plug and the other a helical or volute spring is disposed in a maintaining circuit of an electromagnetically operated main circuit breaker of a current distribution system. As shown, the moving contact 13, Fig. 3, is a plug adapted to enter the end of a helix 14 constituting the fixed contact. The plug 13 may be of tapered or cylindrical form, and of circular, rectangular, and other crosssection, the spring 14 being correspondingly shaped. The switch is used as at 10 in the circuit shown in Fig. 1, wherein actuation of switch 1 energizes a coil 2 which displaces or rocks the spindle 3 of a circuit-breaker 4 to close the contacts on a power line 5, 6, and simultaneously to close switch 10 and open a switch 7 to cause a maintaining circuit to be energized through resistances 8, 9. One contact, e.g. 13 and the blades of the main circuit breaker 4 may be mounted on a common pivot arm.
Patent GB-1375899-A (GB)
Title: Teleprinter receivers
IPC: H04L25/45
Filed: 1972-06-29
Abstract: 1375899 Teleprinters SIEMENS AG 29 June 1972 [8 Sept 1971] 30455/72 Heading H4P A teleprinter receiver receiving multi-element start/stop character signals, comprises a shift register in which the signal elements are stored  and a signal analyser which, if start polarity is present in the stop element and all the characters, issues a blocking signal to prevent onward transfer of the character elements. In the arrangement in the figure, AND gate Gl, on detecting start polarity in all character elements K1-K8 of a received character signal, primes gate G2 which interrogates stop element KSt and if this is also start polarity, issues a blocking signal to transfer control unit USt which prevents the transfer of characters to intermediate store Z1-Z8 and setting up of circuit ASt, which would normally indicate signals ready for call up by the printer. In a teleprinter receiver with a mechanical decoder device, the stop element may control electromagnetically an additional receiver code bar. Specification 1,210,625 is referred to.
Patent GB-189442-A (GB)
Title: Improvements in heat interchange devices
IPC: B01D3/22
Filed: 1922-11-07
Abstract: 189,442. Niederhõusern & Co. Sauerstoffwerk Lenzburg, E. V. Nov. 25, 1921, [Convention date]. Column stills and rectifiers. - In columnar apparatus for treating liquids with gases or vapours serving as a counter current condenser, or rectifying apparatus for use in distilling liquid air, alcohol, &c., the plates are formed by bands or tapes 2 wound in spiral form on a central bush 1. or folded in zig-zag form, the windings being spaced apart at such a distance that the liquid will remain between the windings. The spacing may be obtained either by forming projections 3 on the bands or by winding the band together with a strip of paper or cardboard which is removed after the windings have been fixed by soldering. The coil is given an arched shape and is formed with a surrounding wall 5 which serves to bank up the liquid. The column may be formed of alternate plates consisting of a plate having an arched central portion 6, Fig. 4, with a perforated surrounding wall 7 which allows liquid to flow onto an annular portion 10 and a plate having an outer portion 11 sloping to a lower central portion 12 carried by a perforated wall 13.
Patent GB-200755-A (GB)
Title: Improvements in or relating to chin straps for sun-helmets and the like
IPC: A42B7/00
Filed: 1922-11-07
Abstract: 200,755. Bates, G. S. Nov. 7, 1922. Chin-straps.-A protector for chin straps of helmets comprises a sheet of rubber or the like c adapted to be wrapped around the strap e and to tend normally to lie flat on the surface. To form the protector, a sheet of uncured rubber may be wrapped abcut a zinc strip and retained in that position while it is cured.
Patent GB-1224319-A (GB)
Title: Improvements in or relating to devices for making wrapped connections
Inventor: SILINS ALEKSANDRS
IPC: H01R43/033
Filed: 1967-07-03
Abstract: 1,224,319. Wrapping wire on terminals. GENERAL ELECTRIC CO. Ltd. 3 July, 1968 [3 July, 1967], No. 30499/67. Heading B3E. A device for making a wrapped connection on an electrical terminal comprises a spindle 1 having at one end 2 an axial hole 3 for receiving a terminal, a longitudinal wire receiving groove 6 in its surface, a circumferential groove 8 intermediate the ends of the spindle and intersecting the longitudinal groove, a sleeve 9 provided with a transverse slot 11 in the same plane as the circumferential groove, a cotter blade 12 slidingly supported in the slot and means for actuating the cutter blade to sever a wrapping wire lying in the longitudinal groove. The end 2 of the spindle is provided with a helical surface 5 to guide the wire as it is fed along the groove 6. A collar 13 surrounds the sleeve adjacent the circumferential groove 8. Recesses 15 in the collar accommodate the cutter blade 12 (Fig. 2) and rotation of the collar with respect to the sleeve 10 will slide the cutter from one recess to the other. The central portion of the cutter blade is so formed that when the blade is in one recess no part of it projects within the bore of the sleeve 9 and when it is in the other recess a cutting edge 16 projects into the circumferential groove 8 in the spindle. The sleeve 9 and collar 13 are normally stationary during the wire wrapping operation and when it is desired to cut the wire the collar is rotated with respect to the sleeve and the spindle. The end 2 of the spindle may be provided with a cutting edge for slitting any covering on the wire as it is wrapped around the terminal.
Patent GB-311393-A (GB)
Title: Improvements in and relating to the making of castings
IPC: B22D7/02
Filed: 1928-10-22
Abstract: 311,393. Annener Gussstahlwerk Akt.-Ges. May 12, 1928, [Convention date]. M o u l d s .-Articles subject to local wear, such as railway and tramway points, frogs, and crossings, are cast from two metals of differing hardness. The harder metal, for example high manganese or other alloy steel a, is first poured and when this has become pasty the softer metal b is poured through a number of gates simultaneously.
Patent GB-214926-A (GB)
Title: Improvements in drawing apparatus
IPC: B43L13/06
Filed: 1923-12-06
Abstract: 214,926. Etablissement Recherches & Constructions Scientifiques Soc. Anon., (Assignees of BrouckÞre, L. de). July 5, 1923, [Convention date]. Draughting-machines.-Means for counterpoising a draughting-machine of the parallelogramlink type on a sloping surface comprises supplementary links arranged parallel to the main links and pivoted together frictionally in such a manner as to permit lost motion. The machine comprises the usual links 3, 5 connected to the protractor 2 and the anchoring-device. 7 respectively, both pairs of links being pivoted to the ring 4. The balancing means comprise links 11, 12 pivoted together at their inner ends by a disc 16 on the link 11 passing between discs 17. 18, the periphery of the disc 18 being formed with ratchet teeth engaged by a spring pawl 19 on the link 12. The disc 18 is formed with a square socket engaged by a square projection from the disc 17, an extension of this projection being screwthreaded to receive a nut 23 bearing on a coverplate 21 on the disc 18, so that by turning the nut the friction of the joint can be varied. The link 12 is connected at its outer end by a spring 15 to a fixed abutment.
Patent GB-920098-A (GB)
Title: Servomotor with improved reaction means
IPC: B60T13/575
Filed: 1960-09-06
Abstract: 920,098. Fluid pressure brakes. BENDIX CORPORATION. Sept. 6, 1960 [Oct. 22, 1959], No. 30733/60. Addition to 846,056. Class 103 (1). [Also in Group XXIX] In an improvement in the servomotor claimed in the parent Specification, used to poweractuate the hydraulic brakes of vehicles, the control member 22 of the servomotor which is actuated by a pedal operated push-rod 54 is provided with a generally conical-shaped projecting surface 66 the apex of which forms the initial force transmitting control between the resiliently deformable reaction disc 60 and the reaction transmitting member 64 to improve the " feel " transmitted back to the pedal. Apart from the above modification, the servomotor operates in the same manner disclosed in Specification 846,211. Figs. 6 and 7 illustrate modifications showing in the case of Fig. 6 an alternative projecting surface 666 and in the case of Fig. 7, showing a projecting surface 766 emanating from the deformable reaction disc 60.
Patent GB-838535-A (GB)
Title: Extrusion press container
Inventor: ELKAN ROBERT MAX LUDWIG
IPC: B21C27/00
Filed: 1956-10-09
Abstract: 838,535. Extruding. LOEWY ENGINEERING CO. Ltd. Jan. 8, 1958 [Oct. 9, 1956], No. 30746/56. Addition to 783,863. Class 83 (4). In a billet container for an extrusion press of the kind disclosed in the parent Specification having a plurality of inserts 14-17 fitted within a cylindrical cavity and defining a billet chamber of rectangular cross-section, separate wear plates 18-21 are attached to the inner surfaces of the inserts. The wear plates may have lips at one or both ends, Fig. 2 (not shown), and may be secured to the inserts by dowel pins and/or spot welding or shrinking. The inserts are shrunk within a liner 12 force fitted within an outer casing 10; a cylindrical liner holder may surround the liner. The edges of the wear plates may be chamfered to fit against similar edges on adjacent plates. Each insert may have two or more wear plates arranged side by side or a common wear plate may be used for a number of inserts.
Patent GB-350863-A (GB)
Title: Improved process for the production of artificial silk from viscose
IPC: D01F2/06
Filed: 1930-10-14
Abstract: Cellulose xanthates, and processes of obtaining filaments therefrom.-Viscose artificial silk in the form of strands having a curled or crimped appearance is obtained by uniting two or more bundles of freshly spun filaments which shrink unequally.  Thus, two or more varieties of viscose may be spun into the same spinning bath and the coagulated threads introduced together into a spinning pot; alternatively, two or more different spinning baths may be employed with the same varieties of viscose.  When different viscoses are employed, these may be of different degrees of ripeness or of different composition.  When different spinning baths are employed, these may be of different composition, length or temperature. Different varieties of viscose may further be associated with baths of different length.  In examples, two varieties of viscose having respective salt points of 5,5 and 13, or respective cellulose contents of 8 and 5 per cent, are spun from different spinning nozzles into a coagulating bath containing 12 per cent sodium sulphate, 12 per cent magnesium sulphate and 10 per cent sulphuric acid; the two bundles of filaments being led into one spinning pot. In a further example the same variety of viscose is spun into two baths arranged side by side, one bath comprising 18 per cent magnesium sulphate, 7 per cent sodium sulphate, 1 per cent zinc sulphate, and 10 per cent sulphuric acid; and the other bath comprising 20 per cent ammonium sulphate and 8 per cent sulphuric acid.  The filaments may be collected on bobbins and subsequently twisted, care however being taken that the strands hang freely while drying.
Patent GB-915983-A (GB)
Title: Improvements relating to crystal transducer circuit arrangements
Inventor: LAMBERT PETER GABRIEL
IPC: H03F3/70
Filed: 1960-09-07
Abstract: 915,983. Transistor amplifier circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 16, 1961 [Sept. 7, 1960], No. 30833/60. Class 40 (6). [Also in Group XXXIX] A crystal transducer feeds a transistor amplifier having negative feed-back to the input terminal via an element or network having an impedance whose magnitude and phase angle is of the same order as that of the crystal. As shown, the amplifier is of the cascode type comprising transistors T 1 , T 2 , the crystal impedance TD is purely capacitative is purely capacitative and the feed-back is provided by the capacitor C 2 . The arrangement gives the amplifier a capacitive input, whereby low-frequency attenuation (which would otherwise occur with a low resistance input amplifier) is avoided.