baber/WOPTO huggingface dataset:
Patent GB-1282816-A (GB)
Title: Improvements in or relating to apparatus for the manufacture or printed circuits
Inventor: MAYHEW ANTHONY JAMES
IPC: H05K3/00
Filed: 1970-05-20
Abstract: 1282816 Making printed circuits MARCONI CO Ltd 15 Dec 1970 [20 May 1970] 24333/70 Heading G2A Apparatus for holding two photographic masters 5 in registration with a printed circuit board 4 therebetween comprises two frame members 1, 3, the member 3 being slidable on pillars 2 attached to the member 1; registration pins 6 in the frame 1 which pins may engage accurately positioned slots in the board 4 and masters 5; and suction grooves 7 in each member 1, 3 for holding a master thereagainst even when the member 3 is moved. In use, the frame 3 is raised and the masters 5 inserted and located by the pins 6. The frame 3 is lowered on to the pins, thus sandwiching the masters. Suction is applied to the grooves 7 thereby clamping the masters 5 to their adjacent frames, and the frame 3 is raised so that a blank board 4 can be inserted over the lower master 5 and registered with the pins 6. The frame 3 and its associated master are lowered on to the pins 6, and positive air-pressure is applied to ensure that the masters 5 are in close contact with the board 4, the air also being used to cool the masters 5. After an exposure has been made, the frame 3 and upper master are again raised and the board 4 removed. The process may be repeated for successive boards without any handling of the masters 5.
Patent GB-429826-A (GB)
Title: Improvements in or relating to variable inductances suitable for the tuned high frequency circuits of wireless receiving apparatus
IPC: H01F21/06
Filed: 1933-09-02
Abstract: 429,826. Inductances. POLYDOROFF, W. J., 609, West Lake Street, Chicago, U.S.A., and ALADDIN INDUSTRIES, Ltd., Aladdin Building, Greenford, Middlesex. Sept. 2, 1933, No. 24367. [Class 37] Relates to variable inductances of the type in which there is relative movement between a coil and core of compressed comminuted magnetic material, such as those disclosed in Specifications 366,475 and 405,623. For multi-range tuning, the core member is movable into and out of one wave-range coil and forms part of the magnetic circuit of another core member which simultaneously moves into and out of another wave-range coil, so that the inductance change of one coil arrangement is increased by the proximity of the other core. The coils may be connected with wave-change switches which, if required, short-circuit the coil not in use, or leave it disconnected. The coils may be disposed side-by-side and two core members connected by a yoke employed. In a modification, one coil winding 9 is cylindrical and the other 10 is tapered, the core 11-13 consisting of magnetically joined parts or an integral structure. The coils may be wound single or multilayer, preferably of Litz wire. Specifications 403,368and 403,426 also are referred to.
Patent GB-663179-A (GB)
Title: Improvements in or relating to apparatus for the demodulation of width-modulated pulse signals in telecommunication systems
IPC: H03K9/08
Filed: 1948-09-16
Abstract: 663,179. Pulse modulation. GENERAL ELECTRIC CO., Ltd., HEAD, N. E., and KAYE, E. J. Sept. 16, 1949 [Sept. 16, 1948], No. 24367/48. Class 40 (v). Relates to the conversion of duration modulated signal pulses to rectangular amplitude - modulated pulses of constant duration, The duration-modulated pulses 6 are applied to an integrating capacitor the voltage on which rises to a value 7. The capacitor retains its charge until discharged at the point 8 by a valve rendered conductive by the input pulse after passage through a delay device of predetermined time constant. The longer pulse 61 produces the output pulse 7<SP>1</SP> of correspondingly greater amplitude. To eliminate time modulation a gating device may be provided to slice a rectangular pulse 9 from the trapezoidal output pulse. This may be accomplished, in a time division multiplex signalling system, by using an electronic distributer in which an electron beam crosses a target electrode in a time less than the duration of the pulse applied to its control grid. Specification 628,367 is referred to.
Patent GB-476831-A (GB)
Title: Electric calculating apparatus, embodying potentiometric elements
IPC: G06G7/22
Filed: 1936-09-07
Abstract: 476,831. Calculating - apparatus. GRANAT, E., and COMPAGNIE DES FORGES ET ACIERIES DE LA MARINE ET D'HOMECOURT. Sept. 7, 1936, No. 24383. Convention date, Oct. 31, 1935. [Class 106 (i)] Potentiometrical calculating - apparatus for giving an output proportional to products and quotients, for example as required in sighting apparatus, comprises a fixed resister connected to an input circuit at its ends and to an output circuit between one end and a sliding contact, together with a compensating rheostat in series or parallel with said resister, the variable contacts being mechanically coupled so that a constant overall resistance is obtained for all positions of the coupled contacts. A potentiometer resistance 1 is connected in series or parallel with a variable resistance 2, and the two sliding contacts 6, 9 are mechanically connected, the potentiometric resistance being connected at its fixed ends 7, 8 to an input at 3, 4 and its slider 6 to an output 5. The resistances may be in circular form and may comprise sections having different resistivities or lengths. Resistance units as above for giving an output current proportional to x,y./z sin t, sin u comprise the units 13, 14 ; 17, 18 ; 19, 20; 23, 24; and 25, producing respectively currents proportional to the variables named. Specification 462,830 is referred to.
Patent GB-829237-A (GB)
Title: Improvements in or relating to molded hollow elongated casings for standing micro-telephones
IPC: H04M1/03
Filed: 1957-08-01
Abstract: 829,237. Telephone sets. TELEFONAKTIEBOLAGET L.M. ERICSSON. Aug. 1, 1957 [Aug. 30, 1956], No. 24423/57. Class 40 (4). To reduce acoustic feedback, ridges are formed in the walls of a hollow casing 1 carrying the microphone and receiver (not shown) of a standing microtelephone. In the examples shown, the receiver is mounted at the mouth of a horn 2 and the microphone at the foot 8. The ridges 3 may be longitudinal, transverse or oblique. They are formed in the inner surface of the horn near the mouth. - Electrical components such as capacitors and resistors may be mounted between the ridges.
Patent GB-737829-A (GB)
Title: Improvements in or relating to methods of knitting hosiery
IPC: A01J25/11
Filed: 1953-09-03
Abstract: 737,829. Knitting-machines. HEMPHILL CO. Sept. 3, 1953 [Oct. 31, 1952], No. 24430/53. Drawings to Specification. Class 74 (2). A method of transferring from 2 x 2 or more rib fabric to plain fabric on a cylinder-and-dial machine comprises transferring the loop of one dial needle of a rib group to the corresponding cylinder needle on the passage of the group past a given position and transferring the loop of another dial needle of the group on a subsequent passage of the group past the given position. By arranging the butts of the needles in a predetermined order of long, medium and short, one loop of the rib wales of each group of a 2 X 2 rib fabric is transferred during one course of knitting and the other loop is transferred during the following course. Alternatively one loop of one group may be transferred on one passage of the group past a given position, all of the loops of the remaining groups being transferred as they pass the given position, and the other loop of the initial group being transferred as the group again passes the given position.
Patent GB-1033924-A (GB)
Title: Process and apparatus for preparing gas mixtures containing hydrogen and carbon monoxide
Inventor: BAGGE LEONARD PERCY
IPC: C01B3/36
Filed: 1962-06-26
Abstract: <PICT:1033924/C4-C5/1> A method of making a gas mixture containing hydrogen and carbon monoxide comprises injecting a hydrocarbon, e.g. one liquid at N.T.P., into a stream of hot combustion gas (produced at 6) immediately before introducing that stream as a high velocity jet 3 via an inset 5 into a reaction space 4, an oxygen-containing gas being supplied to the jet 3, at 7, and the resultant gas mixture being drawn off through at least one outlet 8.  The combustion gas is made in a water-cooled chamber 6 by burning a liquid or gaseous hydrocarbon, e.g. propane, with air, the first mentioned hydrocarbon and, if desired, water or steam, being added to the gas stream near the exit from the chamber 6. The oxygen-containing gas may be preheated. e.g. by heat exchange with the gas mixture produced, and is directed tangentially to the jet 3, which enters the space 4 at sonic velocity. The process is preferably carried out at super-atmospheric pressure.  Two or more jets 3 arranged tangentially of the reaction chamber and each supplied with an oxygen-containing gas, may be employed.
Patent GB-365991-A (GB)
Title: Improvements in and relating to blade wheels for fans, compressors and the like
IPC: F04D29/30
Filed: 1931-09-01
Abstract: 365,991. Fan impellers. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitats-Gea. ; 2, Friedrich Karl-Ufer, Berlin.) Sept. 1, 1931, No. 24555. Convention date, Sept. 1, 1930. [Class 110 (i).] A fan impeller comprises a hub a and flange c made in one piece of pressure moulded artificial resin into which the blades b are pressed. The blades are made of metal or stratified strips of fibrous or woven material impregnated with resin.
Patent GB-448021-A (GB)
Title: System of connections for long-distance or control purposes
IPC: H04B1/16
Filed: 1934-08-27
Abstract: 448,021. Repeating systems. COLE, Ltd., E. K., Priory Crescent, Southend-on- Sea. Aug. 27, 1934, No. 24587. Void [Abridged as open to inspection under Sect. 91 of the Acts, Feb. 27, 1935]. [Class 40 (iv)] [See also Group XL] The negative resistance effect obtained across a resistance Ra in the anode circuit of a dynatron R is utilized as in Fig. 3 to block or open the circuit of an amplifier V by varying its grid bias and may thereby serve as a muting system in the low frequency stages of a radio receiver. In Fig. 4 the invention is applied to the selective application of one of two transmitting paths W1, W2 to a long-distance line F. G is a differential rectifier the output voltage Eg of which is proportional to the volume or voltage difference between channels W1, W2. The voltage Ek across resistance Ra in the output of the dynatron R blocks one transmission path and simultaneously opens the other.
Patent GB-1253338-A (GB)
Title: A method and apparatus for coating sheet articles
Inventor: TENCH JOHN DANIEL
IPC: D21H17/60
Filed: 1970-05-21
Abstract: 1,253,338. Coating apparatus; coated sheet materials. SUN OIL CO. 21 May, 1970 [21 May, 1969], No. 24614/70. Headings B2E and B2L. A method of coating sheet articles comprises immersing the articles in a hot liquid coating material, elevating the articles vertically with respect to the coating material and during the period of elevating the articles blowing air over the articles in the coating drainage direction. Apparatus for carrying out this method comprises a vat 1 above which is mounted a hoisting rack and sheet loading assembly 39 having separators 41 which support and space the sheets to be coated. The assembly 39 is supported and lowered and raised by steel ropes 27, 29 attached to the corners of the assembly 39 and these are moved by an electric motor 34. The vat 1 is divided into two; compartments by a plate 2 one compartment taking the articles to be coated and having a heater element 9 and the other having. a heater 4 which initially melts blocks of solid wax which are fed into that compartment. Above and below the plate 2 are. provided wire mesh screens 48, 49 to allow the melted-wax to pass into the main part of the vat. Two banks of fans 52, 53 are provided and are independantly operable as banks at various settings the fans being arranged to blow on coated articles as they are raised from the vat. In operation one rack of sheets is emptied after the other is filled with uncoated sheets and the pairs are operated alternately to act on whichever rack has the coated sheets as they rise from. the vat. An electrical control circuit with limit and timing switches is provided for automatic operation.
Patent GB-268234-A (GB)
Title: Improvements in a garter grip
IPC: A41F11/16
Filed: 1926-10-05
Abstract: 268,234. Borgnis, S. Oct. 5, 1926. Press-button, fasteners for securing a socksuspender round the leg comprise a stud member and a socket member having a hood with the socket inserted therein, the socket being slotted to permit a pair of parallel spring arms 'to protrude therein to engage the stud head. The hood 27 is integral with the wing 26 by which it is secured to the strap 13. The socket 30 is secured within the hood and has a pair of slots 29 through which the arms 31 of the spring 33 protrude into the socket cavity to grip the head 21 of the stud, which is sewn to the pad 11 of the suspender by the wing 17.
Patent GB-1192474-A (GB)
Title: Method and Apparatus for Producing Hydrofluoric Acid of High Purity
Inventor: KAFYROV MAXIM IVANOVICH
IPC: C01B7/19
Filed: 1968-05-23
Abstract: 1,192,474. Filtering gaseous hydrofluoric acid. VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT KHIMICHESKIKH REAKTINOV I OSOBO CHISTYKH KHIMICHESKIKH VESCHESTV. 23 May, 1968, No. 24662/68. Heading B1T. [Also in Division C1] Hydrofluoric acid is purified by passing technical grade gaseous hydrofluoric acid through activated carbon and a post chlorinated P.V.C. mesh carrying a static charge which is obtained by passage of the gas through the filter, dissolving the gaseous hydrofluoric acid in water having an electrical resistance of 10-15 gemohm/cm, treating the solution so formed with solutions of mannitol and potassium permanganate and distilling the resultant solution.
Patent GB-1276986-A (GB)
Title: Frequency synthesis system
IPC: H03L7/20
Filed: 1971-04-19
Abstract: 1276986 Frequency synthesis PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 April 1971 [23 March 1970] 24674/71 Heading H3A A circuit comprising a controlled oscillator 1, mixers 3, 4 to which the oscillator 1 output and the outputs of reference generators 5, 9 are applied, the output of the mixers being applied to control the oscillator so that it locks on to a definite harmonic of the generators 5, 9, the fundamental frequencies of generators 5, 9 being controlled relative to one another by an arrangement, e.g. of frequency dividers 6, 8 and a phase discriminator 7. When oscillator 1 is locked on to an undesired harmonic of 5, the inputs to mixer 4 differ in phase, and the output charge is applied via a capacitor 10 to disturb the looking of 1. A sweep circuit 14 is activated until correct locking is achieved. In embodiment of Fig. 2 (not shown), the reference generators (5, 9) are controlled relative to one another by phase comparing (at 7) the divided output of one generator (5) with the difference frequency of the two to control the frequency of the other generator (9).
Patent GB-1464015-A (GB)
Title: Pulse interpolation system
IPC: G06T11/20
Filed: 1974-06-04
Abstract: 1464015 Interpolation OKI ELECTRIC INDUSTRY CO Ltd 4 June 1974 [5 June 1973]  24723/74 Heading G3N In the provision of interpolation pulses, using an "i" bit interpolation cycle, the axis appertaining to the largest commanded increment of motion receives a pulse for each bit of an interpolation cycle, that appertaining to a lesser increment receiving for each "i" bits, a pulse train coded in response to the quotient resulting from division, by the largest increment, of the product of the integer i and the lesser increment, as modified, using disclosed criteria, in dependence on the remainder of the division, and quotient and remainder of a division of the largest increment by i. The interpolation of the commanded increment is terminated by a part cycle having as many bits as the latter remainder, during which pulses are still provided to the axis appertaining to the largest increment for each bit position, the pulse train for that of the lesser increment being further modified in disclosed manner, the interpolation being terminated when  the number of feed pulses from P, as counted at C2 equals the integer X, or Y representing the greatest increment. The pulse trains are gated to shift registers SR1, SR2 for each interpolation cycle. The signals may be processed in the circuit shown, using divider, multiplier, comparator and an adder, circuits, and AND gates, to supply the pulse trains to peripheral circuit 14, or the latter may receive its input from a computer associated with suitable software. Interpolation along more than three axes may be controlled. The pulse trains may be used by a screw cutter, digital X-Y plotter, or a drawing or graphic display device.
Patent GB-411498-A (GB)
Title: Improvements in and relating to the manufacture of grinding and abrading bodies
IPC: B24D18/00
Filed: 1932-09-06
Abstract: In the manufacture of grinding-bodies comprising abrasive material and a binding-medium, and permeated with artificially produced cavities or cells, the walls of the cavities being substantially solid and free from bubbles, pores &c., the body is produced by placing in a mould bodies of predetermined size and shape, filling the spaces between the bodies with abrasive grains and binding-medium, consolidating the abrasive and binding materials, and then removing the bodies.  The bodies may be in the form of spheres, cubes, cylinders &c. or mixtures of those shapes, and may be of substances soluble in water, e.g. sugar, or substances soluble in organic solvents, e.g. naphthalene, the solvent being employed to remove the bodies from the consolidated grinding-body.  Instead of removal by solvents, the bodies may be removed by volatilisation or combustion, bodies of cork, wood &c. being employed.  The abrasive may be mixed with a binding-material, for example, a synthetic resin in a fluid state, or may be coated with a synthetic resin, dried, filled into the mould, and heated to consolidate the abrasive, and after removal of the bodies, impregnated with liquid synthetic resin and hardened.  Other binding-materials, e.g. ceramic binding-material, cement, or water glass may be employed.  The Specification as open to inspection under Sect. 91 comprises also a grinding-wheel in which the cavities are formed as radial holes produced by pins placed in the material during moulding, or formed as holes parallel to the wheel axis.  The bodies may be distributed in contacting relation over the whole or a part of the wheel so as to form communicating cavities, and the cavities may extend only from the periphery of the wheel to a solid central portion, or may occupy side layers of a wheel with a central solid layer.  The walls of the cavities may be porous.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1046091-A (GB)
Title: N-vinylamides and a process for preparing them
IPC: C07C233/00
Filed: 1963-06-21
Abstract: N-Vinylamides of the formula <FORM:1046091/C2/1> wherein X represents a carbonyl or sulphonyl group and R and R1 each represent an aliphatic, cycloaliphatic, araliphatic or aromatic radical or, if X represents the carbonyl group, may be linked to form a heterocyclic ring containing the nitrogen atom, are prepared by reacting acetylene with an amide of the formula R-X-NH-R1 in the liquid phase, in the presence of a basic catalyst, at a pressure not exceeding 2.5 atmospheres (gauge) and at a temperature between 90 DEG  and 300 DEG C., the N-vinylamide being removed from the reaction core as it is formed.  The invention also comprises the compounds N-vinyl-N-ethyl-propionamide, N - vinyl - N - methyl - isobutyramide and N-vinyl-N-isopropyl-acetamide.  The reaction may be conducted in the presence of a basic catalyst, many being specified.  An especially suitable catalyst is an alkali metal compound of the amide starting material, which compound is preferably prepared in situ by dissolving the appropriate alkali metal or a compound thereof in the amide to be vinylated.
Patent GB-1049405-A (GB)
Title: Railway braking unit mounted adjacent a railway track
Inventor: ROWE GERWYN TREVELYAN
IPC: F16F9/18
Filed: 1964-06-16
Abstract: 1,049,405. Track brakes. WESTING- HOUSE BRAKE & SIGNAL CO. Ltd. May 18, 1965 [June 16, 1964], No. 24883/64. Headings F2E and F2S. In a railway braking unit mounted alongside a railway track, a lever 1 is arranged to lie in the path of a railway vehicle as it passes along the track, the lever 1 being connected to a piston 13 slidable in a cylinder 5, the unit further having choke means 16, 17 whereby the rate of discharge of fluid from the cylinder 5 is restricted to a value dependent upon the choke means when, in operation, the piston is moved within the cylinder by the lever being pivoted due to the engagement of the lever by the flange of a wheel of the passing vehicle. The choke means comprises a first permanently open choke 16 of relatively small cross-section and a second choke 17 of relatively large cross-section in parallel with the first choke and normally closed by spring-loaded valve means 19 which is opened automatically by the application of the pressure of the fluid in the cylinder when the pressure reaches a predetermined value should the vehicle be travelling sufficiently fast. In operation, as the wheel flange of the railway vehicle engages a striker portion of the lever 1 the lever will be rotated through the pivotal connection 2 and the piston rod 11 to allow the piston 13 to be moved to the left, as viewed in Fig. 3, against the effort of the return spring 14. The movement of the piston 13 will force hydraulic fluid through the choke 16 and the conduits 22 and 23 to a reservoir 25, the rate of discharge of the fluid from the cylinder being determined by the capacity of the choke 16. Should the vehicle be travelling sufficiently fast to move the piston 13 with such rapidity that the fluid cannot be discharged through the choke 16 sufficiently fast to accommodate the movement of the piston 13, the pressure of the fluid in the cylinder 5 will build up and this will act on the end face 20 of the spring-loaded valve means 19 forcing the latter to the left to open the valve means and allow fluid to be discharged from the cylinder 5 into the reservoir 25 through the choke 17 which is of appreciably higher capacity than the choke 16. When the vehicle has left the braking unit, the lever 1 will return to its initial position under the influence of the spring 14. The pressure built up in the reservoir 25 during the braking application will then exert itself on the annular face 21 of the spring-loaded valve means 19 to open the valve means and allow the fluid to return through the second choke 17.
Patent GB-893801-A (GB)
Title: Improvements in or relating to devices for scraping or cleaning the bores of pipes
Inventor: BURKINSHAW BRIAN
IPC: F16L55/38
Filed: 1959-07-20
Abstract: 893,801. Pipe cleaning. GENERAL DESCALING CO. Ltd. July 8, 1960 [July 20, 1959], No. 24906/59. Class 99(2). [Also in Group XL(b)] A pipe (e.g. for water) scraper has a body 1 to which two or more sets of radially spaced spring leaf scraper blades 3, 4 are attached, the sets being axially spaced from each other, an annular disc 5 being provided, of smaller diameter than the pipe, against which flow in the pipe exerts pressure driving the scraper through the pipe, the blades 3 of the leading set being provided in pairs superimposed upon each other. Two such scrapers, the leading one with serated edges 9 and the following with radiused edges 4, may be flexibly coupled by members 12 and 13 and spring 14. Couplings 21 and 22 are for a rope or cable drive. A container 19 may carry radio-active material for locating purposes.