baber/WOPTO huggingface dataset:
Patent GB-634644-A (GB)
Title: Improved apparatus for controlling a polyphase induction motor
IPC: B66C13/26
Filed: 1946-07-30
Abstract: 634,644. Transformers. IGRANIC ELECTRIC CO., Ltd. July 30, 1946, No. 22667. Convention date, July 30, 1945. [Class 38 (ii)] [Also in Group XXXVII] Apparatus to subject the primary of a polyphase induction motor to voltage unbalance for braking of said motor comprises an autotransformer and means to establish connections between said motor primary, said autotransformer, and a supply circuit, said means comprising an electro-responsive switch which, when de-energized completes a connection from said motor primary to one tap of said auto-transformer and when energized interrupts said connection and completes a connection to a different tap, and which, upon interrupting the connection to the secondmentioned tap, re-establishes the connection to the first-mentioned tap, the change from one tap to another effecting graduation of braking of said motor. When switches 1 and 4 are closed connections are established, between the primary winding of a polyphase induction motor M, an auto-transformer, and a polyphase supply circuit, to subject the motor primary to voltage unbalance for braking the motor. A connection to the motor primary winding, for example to the centre terminal thereof, is changed from one transformer tapping to another, by means of double-throw switches 5, 6 and 7, for graduation of the braking. Contacts 5a of the switch 5 normally connect the right-hand terminal of the autotransformer, through contacts of switch 4, to the centre terminal of the motor primary winding. When the switch 5 is energized the contacts 5a are opened and contacts 5b closed, and the circuit is now completed through contacts 5b and 6a to another transformer tapping. Similarly, when switch 6 is energized it breaks the connection to the lastmentioned tap and connects the centre motor primary terminal to a higher transformer tapping. Energization of switch 7 completes the circuit to the left-hand transformer terminal. Failure of one or all the coils of the switches 5, 6 and 7 does not result in discontinuation of braking. Short-circuiting of sections of the transformer is also avoided. A resistor r may be included in the circuit completed by the energization of the switch 7, a switch 8 later excluding such resistor. A drum controller may be provided for effecting the connections described. Specification 583,820, [Group XXXVII], is referred to.
Patent GB-882846-A (GB)
Title: Improvements relating to pit-props and other extensible strut-like supporting devices
Inventor: VOGEL RUDOLF
IPC: E21D15/58
Filed: 1957-12-12
Abstract: 882,846. Pit props. GUTEHOFFNUNGSHUTTE STERKRADE A.G. Dec. 12, 1957, No. 22680/61. Divided out of 882,845. Drawings to Specification. Class 20(2) The subject-matter of the present Specification is substantially the same as that of Specification 882,845 but the claims differ.
Patent GB-375122-A (GB)
Title: Improvements in and relating to the control of electric hot liquid storage systems
IPC: H05B1/02
Filed: 1931-08-11
Abstract: 375,122. Heating liquids by electricity; thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of McCormick, F. H. ; 586, Phillips Avenue, Glen Ellyn, Illinois, U.S.A.) Aug. 11, 1931, No. 22695. Convention date, Aug. 11, 1930. [Class 39 (iii).] A storage heater is fitted with upper and lower heating elements 20, 21, means 33 responsive to the temperature in the upper portion for controlling both elements and means 34 responsive to the temperature in the lower portion for controlling the lower element. The immersion elements shown may be replaced by external elements. The upper thermostat co-operates with two sets of contacts 35, 36 and the lower one with one set 37. The upper unit is of high capacity and after an abnormal withdrawal through the pipe 16 contacts 35 will be closed and water at the top of the tank will be readily heated to the desired temperature, the circuit to the lower element being open. Contacts 36 will then be closed and the lower element of small capacity will gradually heat the water in the lower portion. Contacts 37 are closed as soon as cold water is admitted through the pipe 17. With normal demand the upper element is not energized. The thermostats are secured by screws to seats 72 welded to the tank and the terminals of the elements are housed in receptacles 30 fitted with detachable covers 31. The Specification as open to inspection under Sect. 91 (3) (a) describes in detail suitable thermal switches. In Fig. 3 (Cancelled) a bimetallic strip 41 is secured at one end to an aluminium base 40 by a screw 42 and the other end makes knife-edge engagement with one arm of a spring 47. The other arm of the spring engages an adjustable knife-edge bearing 46. The setting of the strip 41 can be varied by a screw 34. A switch arm 52 is pivoted to an actuating arm 53 riveted to the spring 47. A spring 63 biasing the arms together is secured to tongues 52a, 53a pressed from the arms. A stop 64 on the arm 52 limits the movement of the arms 52, 53 towards one another. A projection 60 on the arm 53 is slotted to embrace the arm 52 and a projection 65 on the arm 52 is embraced by the arm 53 and has an upturned portion 65a to prevent the pivoted end of the switch arm becoming detached. The free end of the switch arm carries a contact 66 which co-operates with two sets of contacts 35, 36, or a single set of contacts. This subjectmatter does not appear in the Specification as accepted.
Patent GB-1039316-A (GB)
Title: Improvements in production of plural-phase alloys
IPC: C22C1/02
Filed: 1964-06-02
Abstract: An alloy having one phase consisting of a basis metal and another diatomic phase consisting of an element of the basis metal and another element is made by forming the diatomic phase on the surface or within a sheet of the basis metal which is coiled on itself to form a coiled sheet billet and then extruding the billet.  Thus a dispersion-hardened alloy may be made by surface oxidation of a strip of suitable alloy e.g. Ag-Mg or Cu-Be, heating to promotion diffusion of the oxide throughout the strip, coiling and extruding. Alternatively the heating to promote diffusion may be effected after coiling e.g. by the heating to extrusion temperature.  A superconducting structure may be formed by juxtaposing a strip of Nb and a strip of Zr, coiling the duplex strip, and extruding.  Prior to extrusion the coiled billet may be held at the extrusion temperature for sufficient time for some of the superconducting Nb-Zr phase to form at the interface of the Nb and Zr plies.  A similar structure comprising a superconducting Nb-Sn phase is formed by employing a strip of Sn-Cu or Sn-Ag alloy instead of a strip of Zr.  An alloy having the required microstructure may also be produced by diffusing nitrogen or carbon into a strip coiling and extruding.
Patent GB-506061-A (GB)
Title: Improvements in or relating to multi-range electric measuring instruments
IPC: G01R15/08
Filed: 1937-08-19
Abstract: 506,061. Current and volt meters; resistance measurements. NORMA INSTRUMENTEN-FABRIK BONWITT & CO. Aug. 19, 1937, No. 22803. Void. Convention date, Aug. 19, 1936. [Class 37] A moving-coil instrument has two windings 3, 4, to which are connected two rectifier cells 1, 2, three regulating resistances 5, 6, 7, and a series resistance 8. These resistances are so adjusted that the deflection of the moving coil instrument is equal in the two equal half-cycles in spite of differences in the properties of the rectifier cells 1, 2. To compensate for temperature changes, the resistances 5 ... 8 are made partly of materials subject to the influence of temperature and partly of materials not so subject. This circuit is connected across a resistance 10 having tappings which can be connected by a switch to a terminal A to give different ranges of current measurements. Voltages are measured by connection to terminals x V and changing a switch from terminal a to terminal v. Different ranges are obtained by tappings on a series resistance 11. Switches 12 are set in the full-line position for A.C. measurements. For D.C. measurements, they are changed to the dotted-line position in which the rectifier cell 1 is disconnected and the rectifier cell 2 shunted. In this case, the voltage drop required for a given deflection is less than that required for A.C. measurements. The resistances may be so chosen that the full deflection when measuring D.C. is obtained with one-fifth of the current when measuring A.C., the range selector being in the same position. When high sensitivity is not required, the winding 3 may be replaced by a resistance. A resistance 13 enables the current for voltage measurements to be adjusted to a defined value. Resistances may be measured by connection across terminals X, a potentiometer 16 fed from a current source 14 being adjusted so that the instrument is direct reading.
Patent GB-598462-A (GB)
Title: Suspending device for the electrodes of electric furnaces
IPC: H05B7/10
Filed: 1945-09-05
Abstract: 598,462. Furnace electrode mountings. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Sept. 5, 1945, Nos. 22836 and 22837. Convention dates, Oct. 7, 1944, and June 7, 1945. [Class 39 (iii)] Furnace electrode suspending devices comprise a wire 2 with both ends attached to the electrode 1 by fastening devices 3, 4, one of which is a movable clamp 4 ; the said wire being arranged to run over a pulley block system 8, 9, 10, 11, 12, connected to a hydraulic regulator 14. The wire 2 may be divided into two or more parallel parts 6, 7 at the ends attached to the fastening devices. Jamming devices 21, 22 are provided to fix either end of the wire so that one end with its corresponding clamping device can be loosened and moved to a new position on the electrode which during this operation is supported solely by the other jammed end of the wire. Alternatively, the jamming device may comprise electricallybraked lockable drums round which the wire runs. Coarse electrode regulation may be provided by arranging one of the blocks to be movable, or by moving the regulating device 14 as a whole along toothed racks by an electric motor, the fine regulation being done by the movement of the piston in the regulator.
Patent GB-880640-A (GB)
Title: Improved pot burner
Inventor: STOCKILL EDWARD CYRIL
IPC: F23D5/00
Filed: 1959-07-03
Abstract: 880,640. Pot burners. ESSO RESEARCH & ENGINEERING CO. June 29, 1960 [July 3, 1959], No. 22919/59. Class 75(1) A pot burner comprises a vaporizing plate 4 supported on legs 5 on the base of the pot and a fuel pipe 1 supplying fuel to the plate and insulated at 3 from the wall of the pot. The plate may be concave and slope downwardly from the fuel pipe.
Patent GB-920399-A (GB)
Title: Combined measuring and mixing apparatus
IPC: B01F15/02
Filed: 1961-06-24
Abstract: 920,399. Reciprocating pumps. G. GIANNELLI. June 24, 1961, No. 22929/61. Class 102(1). [Also in Group XXIV] Cylinders 11 in rotors 10 are brought alternately into communication with an inlet 6 from a supply container 4 and an outlet 8. The pistons 14 are connected to fluid pressure actuated pistons 13. The rotors 10 are rotated through a half revolution at a time by means of a flywheel 24 driving through 2 1 reduction gearing 22, 21, the gear 22 having a groove 27 into which a wedge member 30 can be moved and which as the gear is rotated serves to disengage a pin 28 slidable in the gear 22 from a hole in the flywheel. The member 30 is connected to an operation piston 32. The inlet 6 and the cylinder inlet have inserts to shear the material being pumped when the rotor is rotated.
Patent GB-1136043-A (GB)
Title: Improvements in function generating circuits
IPC: G06G7/28
Filed: 1966-05-23
Abstract: 1,136,043. Function generators. GEORGE A. PHILBRICK RESEARCHES Inc. 23 May, 1966 [21 May, 1965], No. 22974/66. Heading G4G. A temperature compensated diode piecewise-linear function generator comprises an output amplifier parallel energized over series resistors from plural segment circuits, in each of which an input is connected over a series resistor to a junction point which is earthed over a pair of back-to-back silicon diodes; - and + bias voltages being applied to the junction point and to the inter-diode connection respectively over series resistors; the breakpoint being established by the resistor values and the negative bias while the compensation range is established by the positive bias (Fig. 3, not shown). Alternatively (Fig. 4, not shown), the segment circuits each comprise a signal input connected to the amplifier over series resistances and back-to-back silicon diodes; the diode junction being earthed over a further silicon diode and biased from a positive transistorized constant current source and from a negative voltage source in series with a silicon diode and resistance. A square low function generator (Fig. 5) comprises e.g. 10 diode segment circuits 82 having different breakpoints energizing the input of amplifier 12 in parallel; each circuit having a diode 84 connected in series with resistance 90 to an input signal bus 92; the junction being earthed over an impedance compensating diode 88 and biased over resistance 94 from bus 95 energized from negative voltage source 98 over temperature compensating diode 96. The signal bus is energized over temperature compensating series diodes 100, 101 shunted by capacitance 116 and receiving bias current from a negative constant current source together with inputs from Ein and E<SP>1</SP>in over diodes 107, 108 selecting the more positive input for operation.
Patent GB-1293294-A (GB)
Title: Relay arrangements, e.g. for use in automatic telephone exchanges
IPC: H04M19/02
Filed: 1971-04-19
Abstract: 1293294 Telephone exchange circuits TELEFONAKTIEBOLAGET L M ERICSSON 19 April 1971 [19 March 1970] 22997/71 Heading H4K A ring-trip relay SB1 is placed in series with a back-biased diode D1 and is shunted by a capacitor C1 so as to pass ringing current without responding. Voltage on the c wire operates SB3 to connect ringing current over transformer T and to connect auxiliary back biasing battery V to charge capacitor C1. Ringing current in the loop finds earth over C1, the winding of SB1 and diode D1 in parallel with C1 being backed off to conduct none or very little ringing current. On reply, and without dependence upon the presence of a ringing burst, the closed loop operates SB1 over both windings to disconnect ringing, relay SB2 follows SB1 to switch the subscriber forward over wires a, b. If the loop has an earth fault, the low resistance lower winding of SB 1 operates the relay to ringing current to effect its disconnection.
Patent GB-1089116-A (GB)
Title: Preparation of polycarbonates
IPC: C08G64/30
Filed: 1964-09-25
Abstract: Polycarbonates are prepared from a saturated cyclic carbonate and a catalyst having the formula (a)NH2-M-NH2or(b) NH2-M-OR1. where R1 is hydrocarbon and M is a Group II metal having an atomic number between 11 and 57.  The carbonate may contain a carbonate ring of at least 6 atoms all of which are carbon or oxygen and having no more than 4 substituents. The substituents may be hydrocarbyl, hydrocarbyloxymethyl, acyloxymethyl, nitro, NR2 where R is hydrocarbon or divalent radical which form a ring together with the carbon atom to which they are attached. Carbonates specified include 4,4-dimethyl-2,6-dioxacyclo-hexanone and 4,4-di(chloromethyl)-2,6-dioxacyclohexane. M may be Mg, Zn, Ca, Sr or Ba.  Catalysts specified include NH2CaOC2H5 and NH2CaOC3H7. The reaction may be under a nitrogen atmosphere and the product may have a M.W. of 10,000 or more.
Patent GB-230297-A (GB)
Abstract: 230,297. French, A. W. April 14, 1924. Buckets, double - acting bucket pumps ; pipes; packing, non-metallic. - In a spray-producer comprising a double-acting bucket pump, the barrel 8 of which depends into the liquid container and is packed at the upper end by a washer 17 held in place by a screwed sleeve 18 and engaging the rod 1, a stuffing- box 20, 21 is arranged in an accessible position on the cuter end of the sleeve 18 to prevent leakage along the rod, The packings 17 and 20 may be of different materials, such as leather and felt. The liquid passes through the rod 1 to the sprayer 24, and the rod is constricted near the lower end to form a stop for the valve 5. Specification 4639/15 is referred to.
Patent GB-771426-A (GB)
Title: Improvements in or relating to couplings having helical torque transmitting frictionmembers
Inventor: SACCHINI COLUMBUS RAINER
IPC: F16B1/04
Filed: 1955-08-10
Abstract: 771,426. One-way brakes. MARQUETTE METAL PRODUCTS CO. Aug. 10, 1955, No. 23065/55. Class 103 ( 1 ). A one-way brake device of the type wherein a spring - tempered helical friction spring 29 normally grips a mating circular non-rotary drum surface 3 on a housing 1 and has spring releasing shoulders 29 at its opposite ends operated by correspondingly positioned shoulders 9a and 9b of a rotary input member 5 to enable angular movement of a conical output member 15 by the input member 5, and wherein a pair of spring energizing shoulders 10a, 10b on the output member abut other shoulders 30 at the opposite ends of the spring in a manner to prevent, through drum gripping action of the spring, the output member 15 being turned out of input adjusted position by its connected load is characterized in that the spring shoulders 29, 30 are provided on metal lugs formed separately from the spring and operatively rigid with end coils of the spring and located in alignment with the spring coils axially of the spring, and the releasing shoulders of the input member as well as the spring energizing shoulders of the output member are located in alignment with coils of the spring axially of the spring.
Patent GB-245195-A (GB)
Title: Improvements in and relating to umbrellas
IPC: A45B13/00
Filed: 1924-09-30
Abstract: 245,195. Clark, J. J. Sept. 30, 1924. No Patent granted (Sealing fee not paid). Covers.-A waterproof cloth or paper top 10, Figs. 1 & 2, of an emergency umbrella, is provided with strip wood ribs 11 secured thereto by tape strips 13, 14, and is attached to a handle 15 by location between discs 16, 17. The disc 16 is either located by a pin 18 passing through the handle or is rigidly attached thereto. The lower disc 17 is held in position by a spring latch 20 abutting either against the disc or against an interposed member 19 which may be integral with the disc. The top may be folded along lines 21 when removed from the handle, which may be of telescopic construction. The ribs may be secured at their inner ends by tape strips to a small apertured disc, or the ribs may be of wire pivoted to a ring which has a concentric cup in which the handle is seated. In an alternative form, Fig. 7, no handle is used, the ribs 11 crossing each other and being secured to the top by passing through slits 13 therein. This form of umbrella is grasped at the intersection of the ribs and held above the head of the user, and the ribs may be made to fold like a carpenter's rule so as to facilitate packing. Reference has been directed by the Comptroller to Specifications 15043/11, 3678/14, and 108,652.
Patent GB-1034693-A (GB)
Title: Production of monoisocyanates
Inventor: HENNIG HANS JOACHIM
Filed: 1964-06-04
Abstract: Monoisocyanates are made by heating N,N1-disubstituted ureas, monosubstituted ureas or primary amines at 150-300 DEG  C. with the distillation residues containing NCO groups formed in the production of isocyanates from amines and phosgene.  The monoisocyanates are distilled off from the reaction mixture.  It is preferred to use less than the stoichiometric amount of urea or amine based on NCO content of the residue.  The initial reaction is an addition to form substituted biurets or ureas which are subsequently thermally decomposed.  Solvents or suspension agents may be present. Examples relate to the preparation of methyl-, ethyl-, n-propyl-, alkyl-, and n-butyl isocyanates. Many other urea or amine reactants are specified, including chloro- and alkoxy substituted compounds.
Patent GB-583724-A (GB)
Title: Improvements in tubular electric lamp fittings
IPC: H01R33/08
Filed: 1944-11-23
Abstract: 583,724. Lamp-holders. LOWE, K. C. Nov. 23, 1944, No. 23273. [Class 38 (i)] A lamp-holder 3 having bayonet slots and contact plungers suitable for engaging a doubleended lamp is mounted so as to be movable axially and also rotatably to a limited extent. The holder 3 is provided with two threaded lock rings which grip a plate 8 permitting the holder 3 to move with a fixed tubular member 1 rotation being limited by a notch 9 engaging a ridge 7 inside the member 1. The holder 3 is pressed against the lamp by a spring 5, which abuts against a washer 6, bearing on screws 11 in a bracket 2, carrying the member 1. The bracket 2 is provided with a cover plate 12 and is fixed by lugs to a trough-shaped reflector 15. The other end of the lamp engages a fixed holder, both holders being covered by slidable white enamel - sleeves 16.
Patent GB-393440-A (GB)
Title: Improvements in and relating to high frequency transmission systems for railway signalling
IPC: H04B5/00
Filed: 1932-08-19
Abstract: 393,440. Wired-wireless systems ; inductive signalling. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Alexanderson, E. F. W. ; 8, Adams Road, Schenectady, New York, U.S.A.) Aug. 19, 1932, No. 23310. Convention date, Aug. 20, 1931. [Class 40 (v).] , For communicating to and between moving vehicles or between different parts of a train on a railway track, or for effecting signal and control operations, a transmission line, capable of propagating without substantial radiation electric waves when excited by high-frequency oscillations, is incorporated with or arranged alongside the track, and means are carried by a vehicle on the track for exciting or for being excited by high-frequency oscillations in the transmission line, a rail of the track being used as the means for impressing the oscillations on the said line or for deriving energy therefrom. The transmission line may consist of a conductor connected through spaced impedances to one or both rails, or a pair of conductors extending along the track and coupled together at intervals through impedances may be provided. In the simplest arrangement described, a conductor parallel with the track is connected to one rail by condensers spaced at equal intervals which are preferably such that there are four or five condensers in every half wavelength. The total capacitance of the condensers should be about ten times that of the inherent capacities between the conductor and the associated rail. A more practicable arrangement is shown in Fig. 2, in which the two rails 5 are connected together at regular intervals by series-connected condensers 6. a point intermediate between the members of each pair of these condensers being joined through a condenser 3 to a conductor 2. With properly proportioned condensers 3, existing conductors used for other purposes such as block signalling may be adapted for this invention to serve as the conductor 2. Two vehicles 7, 8 are shown diagrammatically as being provided with air-cored coils 9, 10 arranged above the rails, the coils serving to couple transmitting and receiving apparatus on the vehicles with the rails for the purpose of inducing in or picking up from the transmission line high-frequency oscillations. Resistances may be substituted for the condensers 3, 6, a condenser being also provided, however, in each connection to the conductor 2 to prevent the passage of low frequency or direct currents used for other purposes. Fig. 4 shows an arrangement in which two conductors 13, 14 extend along the track, and instead of there being direct connection to. the rails 5, inductive couplings are provided by coils 16 connected to the conductors 13, 14 through condensers 15. In Fig. 5,.an arrangement is shown similar to that of Fig. 2 but having a modified arrangement of condensers coupling both rails 5 to a single conductor 2 ; the transmission line is shown as terminated by its surge impedance comprising resistances 20.