baber/WOPTO huggingface dataset:
Patent GB-151049-A (GB)
Title: Improvements in or relating to building construction
IPC: E04B2/34
Filed: 1919-05-16
Abstract: 151,049. Struben, A. M. A. May 16, 1919. Joist floors; reinforced-concrete girders and beams; double walls; columns.-Relates to floors and ceilings of the kind constructed with slabs. blocks, &c. of concrete placed side by side and supported by concrete beams formed in situ by filling with concrete the space between the slabs or blocks and premoulded troughs, which may be arranged to form a system of main and secondary beams. The slabs, which may be of reinforced or plain concrete, are provided with two flanges a, Fig. 13, joined at intervals by gusset stays z, and may be provided with a continuous or apertured central web. The flanges may be of unequal width and the lower or both flanges reinforced with expanded metal, wire netting, steel or wood rods, or other suitable material. As shown in Fig. 10, the ends of the slabs may be shaped to form a more solid construction. The troughs for the beams may be of reinforced or plain concrete, or of steel, wood or other material and may be arranged to form a system of main and secondary beams, as shown in Fig. 11. Reinforcing bars and stirrups are laid in the troughs where desired. The troughs may be removed after filling or left in place as a covering. In the Provisional Specification, it is stated that walls may be constructed of slabs a, Fig. 1, provided with flanges b and filling-grooves c; that quoin blocks d. angle blocks f, corner blocks f<1>, door or window blocks and mullions, and flue blocks are provided with grooves formed by flanges e to support and bind adjacent portions of the building with hidden joints; that columns are formed from hollow blocks filled with concrete and provided with similar grooves; and that beams for door or window openings are formed of U-shaped blocks n, Fig. 4, filled with concrete and reinforced by bars p.
Patent GB-307866-A (GB)
Title: Improvement in electrolytic etching machines
IPC: C25F7/00
Filed: 1928-04-27
Abstract: 307,866. Johnstone, G. F. March 15, 1928, [Convention date]. Metals, removing; electrolytes, agitating; electrodes.-In electrolytic etching apparatus the electrolyte is agitated by the introduction of air from perforated pipes 33 of a rubber composition inert to the electrolyte. The air is supplied from a pump through a pipe 26 from which it enters a separator 27 where any lubricating oil escaped from the pump is deposited, and passes by a pipe 32 to the pipes 33. The oil collects in a well 29. The air supply pressure may be varied by means of a valve 30 operated by a stem 31 in a pipe 28 leading from the separator to the intake of the pump. The plate to be etched forms the anode and is mounted opposite a cathode comprising parallel spaced strips 38 secured to a frame 37. When copper is to be etched, an electrode is employed the edges of the strips of which lie in a plane. When zinc is to be etched the cathode is formed so that the edges lie on a curved surface the centre of which is nearest to the article; it is stated that this conduces to conform action. The pump is driven by a motor which also drives a generator supplying the cell through a switch and rheostat.
Patent GB-1430133-A (GB)
Title: Regulation of temperature
IPC: F23N5/02
Filed: 1973-03-15
Abstract: 1430133 Controlling furnace burners; burner controllers SOC CLARC SRL 15 March 1973 12455/73 Headings F4B and F4T [Also in Division G1] Apparatus for sensing and maintaining the temperature T 2  at a location (e.g. in a furnace) comprises a device A through which fluid flows, the pressure of the fluid at a sensor 18, 19 varying with change of temperature T 2  whereby the sensor is actuated suitably to control a heat source 15 to maintain or restore the temperature of the location to T 2 . As shown, the device A which comprises two concentric tubes 6, 7 extends at its end 8 into the furnace 17 and the tube 6 is fed with water or alcohol at a temperature T 1  and at a constant pressure as determined by a flow control 5 and a constant head arrangement 1, 2, 3. The liquid which issues from the tube 6 at the end 8 is heated by the effect of temperature T 2  before it passes along the tube 7 to a discharge pipe 9 provided with a flow regulator 10, the liquid, in the case of alcohol, being returned via a heat exchanger to the arrangement 1, 2, 3. A piston 18 movable in a cylinder 19 of the device A senses pressure variations due to temperature variations of T 2  and acts accordingly on a pivoted lever 13 connected to a rod 14 which controls a flame 16. The furnace 17 may be in the form of a rotary kiln for use in the production of expanded clay.
Patent GB-1505745-A (GB)
Title: Method for detecting volatile meterials
IPC: B01J12/00
Filed: 1975-03-25
Abstract: 1505745 Detecting volatile materials SIEMENS AG 25 March 1975 [27 March 1974] 12526/76 Heading A5G A method for detecting leakage of the vapour of a volatile material from a first container e.g. an ampoule comprising surrounding the first container with a gas contained under pressure in a second container, the gas comprising a gaseous substance which on contact with the vapour will therewith form a detectable product within the second container. The volatile material e.g. arsenic, phosphorus or sulphur in the first container may be in admixture with a less volatile material e.g. gallium or indium, for reaction therewith in the first container. The gaseous substance may be oxygen or carbon dioxide and may be in the form of air in admixture with an inert gas such as nitrogen or helium.
Patent GB-847015-A (GB)
Title: Liquid oxygen-carbon explosive and method of producing same
IPC: C06B43/00
Filed: 1958-04-21
Abstract: The process of the parent Specification, according to which carbon for use in making a liquid oxygen-carbon explosive is produced in a three-stage process from finely divided bituminous particles capable of expanding on heating to plasticity, is modified in that the carbon is made by a two-stage process comprising firstly flash-calcining the bituminous particles entrained in a gaseous atmosphere containing oxygen in an amount such that at least 10% of the evolved matter remains unburned, whereby the volatile content of the calcined expanded particles is reduced to less than 12% by weight, and secondly separating the carbon, which has a bulk density of 5-20 pounds/cubic foot from the gaseous and vaporous products thus produced at a temperature not less than that at which all the vaporous products remain in the vaporous state.  The flash calcination is preferably carried out at 1150-2000 DEG F.  The carbon may have an ash content of less than 15%.  Examples are given.
Patent GB-873900-A (GB)
Title: Improvements in and relating to dynamo-electric machines
Inventor: CARFRAE WILLIAM JOHN
IPC: H02K1/18
Filed: 1957-04-17
Abstract: 873,900. Cores for dynamo-electric machines. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Jan. 20, 1958 [April 17, 1957], No. 12555/57. Class 35. Segmental core laminations 6, 6a are located by recesses 9 engaging longitudinal bars 4, 4a welded into semi-circular recesses 2, 3 in frame plates 1. These apertures in the frame plates are made by drilling a ring of holes and then boring out the centre. If there are an even number of winding slots per lamination segment (as shown), the recesses 2, 3 are evenly spaced, but if the number is odd, then the spacing is alternate. The bars 4 have threaded ends for the attachment of the end plates of the lamination stack. The bars have longitudinal slots to render them less rigid and to reduce the transmission of vibration to the machine frame. These slots may be tapered and may completely pierce the bars or not. The recesses 2, 3 may be more or less than semi-circular.
Patent GB-660417-A (GB)
Title: Improvements in or relating to electrical inductors
IPC: H01F21/06
Filed: 1949-05-11
Abstract: 660,417. Inductances. PHILCO CORPORATION. May 11, 1949 [May 11, 1948], No. 12563/49. Class 38 (ii). An inductor 9 comprises a tube of conductive material having a longitudinal slit 21 in the wall and extending the whole length of the tube, and having also a plurality of longitudinal slots 22- 26 in the wall, these slots being spaced around the tube and extending from one end thereof towards the other but stopping short thereof, the adjacent slots extending from opposite ends of the tube so that a single conductive path of serpentine configuration obtains between the opposing edges of the slit 21. A powdered iron core 10 may be provided, with means to alter its position relative to the inductor 9 so as to vary the inductance thereof.
Patent GB-142858-A (GB)
Title: Improvements in and relating to rotary pumps
IPC: F04C2/344
Filed: 1920-05-06
Abstract: 142,858. Perusseau, F. J. May 6, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Fixed-abutment type; discharge and suction pipes and passages for pumps &c.-Relates to a pump of the fixed-abutment type with outwardly sliding vanes. The casing 1 is cylindrical and is cast in one piece with suction and discharge chambers 6 and 8 which communicate with the interior of the casing through obliquely disposed ports 5 and 7. The casing is closed by plates 3 and 4, provided with bearings for the shaft 13 which carries the rotor 14. The rotor is mounted eccentrically to the casing, which it touches at the top, and is slotted to receive two mutually perpendicular pairs of diametrically disposed vanes 19 which are pressed outwards into contact with the casing by springs 24.
Patent GB-328433-A (GB)
Title: Improvements in electric interlocking plants for the control of railway signals
IPC: B61L7/06
Filed: 1929-04-23
Abstract: 328,433. Telefonaktiebolaget L. M. Ericsson, and Hard, T. April 23, 1929. Interlocking.-In a system of power operated points or track locks, transfer of control from an interlocking frame to a local operating switch 6 by a mid-position setting of the interlocking lever is indicated by the cutting out of a magnet 12 by which the battery switch 10 is released in the initial movement of the control lever. A reversal of the point-control lever throws the switch 10 into a position where it is locked by the detent 11 and thus in the left hand position of the interlocking lever the points motor circuit is closed over battery 14, the switches 10, 3, 4, 16, and the field coil 8 and in the right hand position it is closed over 10, 3, 4, 17, 9. When the motor is started one of the switches 16, 17 is operated to prepare for the reverse movement and when the point is over the other switch operates to break the motor circuit and close a circuit for the magnet 12 over the battery 14 and the switches 10, 3, 4, 16 or 17. Energization of the magnet 12 releases the switch 10 which is pulled back by a spring 13 and leaves the magnet 12 energized by a lower voltage battery 15. An indicator shows when the magnet 12 is energized and a second indicator such as a lamp 18 shows the local station when the control is transferred.
Patent GB-216865-A (GB)
Title: Improvements in distributing slide valves for locomotives and other engines
IPC: F16K3/30
Filed: 1924-05-23
Abstract: 216,865. Nicolai, K. May 30, 1923, [Convention date]. Slide valves, cylindrical and piston.-A locomotive or other engine is provided with a slide valve having pairs of relatively displaceable piston heads at each end which act as relief valves and enable the engine to run without steam. The heads c are rigidly fixed to the rod a and are preferably separated from the heads e which may slide on the rod by springs f. During normal working the heads are held in contact by steam pressure, but are separated during idle running or under excessive cylinder pressure produced by the presence of water or otherwise, thereby puting the cylinder into communication with the exhaust space A.
Patent GB-595624-A (GB)
Title: Electric pulse modulation system
IPC: H03K7/08
Filed: 1945-05-18
Abstract: 595,624. Pulse modulation and generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 18, 1945, No. 12648. Convention date, Jan. 5, 1944. [Class 40 (v)] A flip-flop multivibrator comprising valves V1, V2, Fig. 1, of which V1 is non-conducting and V2 is conducting in the passive state, is triggered by a train of equally spaced pulses applied to the grid of one of the valves over leads 10 or 11. The pulses are positive if applied to V1 or negative if applied to V2. The positive cathode cut-off potential of valve V1 is provided by a potential divider connected across the H.T. supply and comprising resistance R4 and a voltage regulator tube VR. For modulating the duration of the output pulses, taken from one of the anodes of valves VI, V2, modulating signals are fed to the grid of valve V3 connected between the H.T.+ terminal and an adjustable tapping on the grid resistance R3<1> of valve V2, to vary the bias on the latter. The positive width-modulated rectangular pulses, for example from the anode of V2 have a leading edge of fixed phase and a trailing edge of variable phase. Short phasemodulated pulses are derived therefrom by a differentiating circuit 20, 21, Fig. 4, the resulting positive leading-edge pulses being suppressed by the shunt diode 23 and the negative phasemodulator trailing edge pulses being passed to an output lead 24 through the series diode 22. If the width-modulated pulses are derived from the anode of V1, being of negative polarity, the diodes 22, 23 are reversed in direction, Fig. 5 (not shown). The phase-modulated pulses may be fed to a further flip-flop circuit, similar to that already described, before utilization, Fig. 6 (not shown).
Patent GB-1005727-A (GB)
Title: Novel steroid compound and its preparation
IPC: C07J75/00
Filed: 1961-12-13
Abstract: The invention comprises 13b -n-propyl-18-norestrone and its 3-ethers and a process for the preparation thereof in which 13b -n-propyl-18-nor -estradiol is selectively oxidized to yield 13b -n -propyl-18-nor-estrone which is optionally thereafter etherified. Oxidation may be effected by treatment with aluminium isopropylate in the presence of cyclohexanone and etherification with dihydropyran thereby forming 3-(tetrahydropyranyl - 21) - oxy - 13b  - n - propyl - 18 - nor - estrone. Specifications 979,891 and 1,005,726 are referred to.
Patent GB-112748-A (GB)
Title: Improvements relating to Fluid Pressure Braking Systems.
Inventor: TURNER WALTER VICTOR
IPC: B60T15/04
Filed: 1917-09-05
Abstract: 112,748. Turner, W. V. April 2, 1917, [Convention date]. Fluid-pressure. - Relates to combined straight and automatic vehicle brakes in which the brake cylinder 2 is adapted to be supplied from the reservoir 3 either by way of the driver's valve 7 and a straight air pipe 5 or directly through an emergency valve 1 upon a reduction of pressure in a pipe 4. The reservoir is connected through the valve 1 and a pipe 6 to the driver's valve and the slide valve is provided with a restricted port 28 adapted to register with the pipe 6 whereby pressure can be restored in the piston chamber of the valve for releasing the brakes after an emergency application. The reservoir 3 is connected to the chamber 11 of the valve 1 and air flows therefrom through the normally uncovered passage 15 to the pipe 6, and by way of chamber 19 in the driver's valve 7 to the emergency pipe 4 and the piston chamber 8 of the valve 1, which thus assumes the position shown in which the brake cylinder 2 is connected by the valve cavity 23 and straight air pipe 5 to the exhaust port 27 of the driver's valve. For a straight air application, the driver's valve is moved to connect pipe 5 to the chamber 19 of the valve and air thus flows from the pipe 6 into pipe 5 and to the brake cylinder. If the pressure in pipe 4 is reduced either through the driver's valve or through breakage of the pipe 4, the valve 1 is actuated and the brake cylinder passage 22 is uncovered to the valve chamber 11 so that pressure air is supplied directly from the reservoir 3 to the brake cylinder. In the emergency position of the valve 1, the restricted port 28 registers with the pipe 6 and the release of the brakes can thus be effected by turning th driver's valve 7 to release position whereby air will be supplied from the valve chamber 11 through the pipes 6 and 4 to the piston chamber 8. Breakage of the pipe 6 effects an emergency application of the brakes.
Patent GB-543148-A (GB)
Title: Improvements in methods of magnetizing and de-magnetizing magnets
IPC: H01F13/00
Filed: 1940-08-09
Abstract: 543,148. Magnetizing and demagnetizing permanent magnets; electric tests. REYNER, J. H. Aug. 9, 1940, No. 12777. [Class 33]  Magnets are magnetized or demagnetized by a coil which carries a succession of-separated halfcycle pulses of current from an alternating- current supply. The short pulses may be separated by relatively long intervals to enable currents of high peak value to be used with a relatively small heating effect and a relatively small coil for a large magnetizing force may be employed. The form shown employs a rectifier 4 and two commutators 7 and 8 connected in series on an A.C. supply 3 for calibrating a speedometer 1 of the type having a permanent magnet rotating within an eddy-current cup. The magnet is driven at a speed which corresponds to any given miles-per-hour value and the magnetizing or demagnetizing current pulses in the coil 2, which is placed around the instrument, are adjusted until the needle stands at the given value on the scale. The adjustable current is taken from an auto-transformer 10 and is made to strengthen or weaken the magnet by a throwover switch 6. The commutator 7 is directcoupled to a synchronous motor 9 and the other one 8 is geared down at 12. Dimensions of the contact segments and speeds are given in the Specification showing that the commutator 7 makes the circuit ready to conduct every few cycles and the other one closes the circuit for one half cycle in every group of spaced cycles, the circuit being made and broken at the instants of zero current so that there is no sparking at the commutators. The method may be used for magnetizing or demagnetizing any magnetizable object or for making permanent magnets.
Patent GB-401274-A (GB)
Title: Improvements in, and relating to, hand saws
IPC: B23D51/01
Filed: 1932-05-04
Abstract: 401,274. Saw handles. SPEAR & JACKSON, Ltd., Savile Street, Sheffield, and TAYLOR, G., 3, Court Avenue, Halewood, near Liverpool. May 4, 1932, No. 12847. [Class 61 (i).] The cross - grained grip part c of a saw-handle b is strengthened by a rivet, bolt, or screw d extending through a bore therein.
Patent GB-790690-A (GB)
Title: Improvements in or relating to transistor circuits
IPC: H03K3/281
Filed: 1955-05-04
Abstract: 790,690. Transistor mono-stable and bi-stable circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 4, 1955 [May 7, 1954], No. 12939/55. Class 40 (6). In a circuit arrangement for controlling a mono-stable or bi-stable state circuit 1, two control terminals 8, 9 of the circuit are coupled to the bases respectively of two transistors 13, 14 having their emitter-collector paths in parallel, with control pulses applied to the two emitters and producing a pulse across the appropriate output load 16, 15. Due to the emitterbase capacity of the transistors 13, 14 the triggering pulses, Fig. 2 (not shown), are given an enhanced leading edge. Transistors 2, 3 form a mono-stable or bi-stable pair and may operate similarly to the circuit of Specification 778,152. Assuming transistor 2 to be conducting, the base of transistor 14 will be lower in potential than that of transistor 13. Input pulses 11 applied to transistor 12 appear as positive pulses at the emitters of transistors 13, 14, causing a pulse to pass through the transistor 14 to reverse the state of the trigger-pair 2, 3. The change-over of the trigger-pair reverses the bias on the bases of the transistors 13, 14 so that the next pulse 11 again reverses the state of the trigger-pair. The trigger-pair may be replaced by a single transistor operating in a triggercircuit, as described in U.S.A. Specification 2,533,001. If an NPN transistor is used for stage 12 positive triggering pulses are necessary, and a number of circuits may then be cascaded.
Patent GB-308505-A (GB)
Title: Device for directing or guiding tramway or other cars at rail junctions
IPC: B61L11/02
Filed: 1928-05-02
Abstract: 308,505. Litvinchev, I. May 2, 1928. Points with fixed tongues.-Auxiliary guiding- means comprise a single rail 5<b> with two grooves engaged by a double roller or two single rollers 10 carried by the vehicle. The rollers are moved vertically by a fork 11, operated by hand or power means. A scraper 12 may be provided in front of the rollers and carried by radius rods 13 hinged to rods 14 pivoted to the vehicle.
Patent GB-702075-A (GB)
Title: Improvements in the colouration of cellulose acetate
Inventor: KRUG PAVEL
IPC: D06P1/22
Filed: 1950-03-04
Abstract: Cellulose acetate fibres are dyed by means of a pre-formed dispersion of an acid leuco vat dye which has been prepared by reduction of vat dyestuff with thiourea dioxide in the presence of alkali with subsequent acidification.  When used for printing cellulose acetate fabrics, the printing paste may contain an excess of free thiourea dioxide, and the printed fabric aged before oxidation to develop the colour.  An Example is given in which cellulose acetate fabric is printed with a paste made by heating together Caledon Jade Green XNS, thiourea dioxide, caustic soda and water, and then pouring the leuco vat solution thus formed into a mixture of tragacanth thickener and acetic acid; the printed fabric is then aged in saturated steam at 102 DEG C and oxidized.
Patent GB-941286-A (GB)
Title: Method and apparatus for forming foundry cores
IPC: B22C15/24
Filed: 1961-04-11
Abstract: 941,286. Moulding-machines. OSBORN MANUFACTURING CO. April 11, 1961 [June 23, 1960], No. 13041/61. Heading B3F. A foundry core moulding machine comprises means for clamping a core-box including a separable cope and drag firmly in position to receive sand blown therein and to separate the cope and drag after the core box has been unclamped in such a way that the core remains in the drag and is drawn from the cope, and means for inverting the drag after the core has been drawn from the cope to facilitate the removal of the core from the drag. The drag 57 is supported in a cradle mechanism 56 vertically movable by cylinders 30, 31, and the cope 81 is supported on pins 77, 78. Upward movement of the cradle clamps the drag and the cope against a blowhead 23 filled with sand from a hopper 20 through a piston-actuated sliding gate mechanism 21 which includes an inflatable ring seal 110. After the sand has been blown into the box, it is moved downwardly by the pistons 30, 31, there being, if necessary, a timed dwell period for curing. The cope is received on the pins 77, 78, thus to separate the cope and drag, continued downward movement of the cradle moving the drag to a position where the drawn core is free of the cope. The movement of the cradle is guided by cam slots 67 in plates 65, 66 which cause the drag to be inverted during continued downward movement. Other mechanism 140 causes an arm 154 to swing over behind the drag and contact the ejector plate 200, Fig. 9, so that on the next upward movement of the drag the ejector plate is restrained from following the initial movement and the core is ejected to a conveyer C. Alternatively the inversion of the mould may be stopped at the intermediate position 28 shown dotted in Fig. 9, and the core removed by hand. A cylinder 89 attached to the cradle linkage acts as a counterbalance during inversion. The core box parts have electrical heating means 210, 211, and the blowhead 23 has cooling tubes 135. Mould and core materials.-The core mix may be a shell moulding mixture comprising 6-8% of a phenol resin and hexamethylenetetramine, or comprise an acid catalyst such as muriatic or oxalic acid, or green moulding sand with an oil or rosin binder.