baber/WOPTO huggingface dataset:
Patent GB-1519304-A (GB)
Title: Fast recovery limiting and phase inverting amplifier
IPC: H03F3/45
Filed: 1975-07-23
Abstract: 1519304 Transistors limiting amplifier circuits TEKTRONIX Inc 23 July 1975 [16 Sept 1974] 30764/75 Heading H3T An amplifier, e.g. for applying a sweep signal to deflection plates of a cathode-ray tube comprises means for converting an input signal voltage to a signal current linearly related to said signal voltage and including a pair of opposite conductivity transistors 42, 44 for maintaining said signal current between two defined current limits and a phase-inverting or balanced amplifier for converting said signal current to corresponding output voltages and including common mode signal detecting means for providing a feed-back signal for minimizing the common mode component in said voltages. As shown, a sweep signal at 10 is fed to an amplifier 12 whose gain can be switched into a plurality of steps and the output of which feeds a para phase amplifier comprising transistors 16, 18, 28. The upper and lower limit of output from amplifier 14 is determined by transistor 42 or 44 becoming conductive at a level adjustable by voltage dividers 46, 48. The output of amplifier 14 is fed to a phase-inverting shunt feedback amplifier 140 consisting of emitter-coupled pairs of transistors 52. 54; 72, 74, the latter having current sources formed by transistors 78 and 80. The emitters of transistors 52, 54 are coupled by resistors 60, 62 to the output terminals 56, 58 so as to maintain constant the DC level of the sweep voltage. A common base transistor 94 responds to the DC level of the emitters of transistors 72, 74 so as to correct the current supplied by the current source transistors 78, 80. This circuit does not respond to slow variations in the common mode signal because of the relatively short time constant of the coupling capacitors 98, 100.
Patent GB-618036-A (GB)
Title: Improved coat-hanger
IPC: A47G25/36
Filed: 1946-10-16
Abstract: 618,036. Coat-hangers. THEVENIN, P. Oct. 16, 1946, No. 30787. Convention date. Feb. 20. [Class 52 (v)] A collapsable coathanger comprises three rigid elements 1, 2 and 3 the bottom element 1 being loosely hinged by rings 4 to the lower ends of the side elements the upper ends of which are loosely connected by a chain 8 carrying the suspension hook 10. The elements may be of channel, V-shape, or polygonal section to interfit when collapsed and the lower element 1 may be of solid or tubular construction.
Patent GB-1194463-A (GB)
Title: High Voltage Direct Current Power Transmission Plant
Inventor: BOKSJO CARL INGVAR
IPC: H02M7/757
Filed: 1968-06-28
Abstract: 1,194,463. H.V.D.C. power transmission. ALLMANNA SVENSKA ELEKTRISKA A.B. 28 June, 1968, No. 30835/68. Heading H2F. In a H.V.D.C. transmission system, the rectifying station 1 employs uncontrolled rectifiers and has an automatic voltage regulator on the A.C. side so as to feed a constant voltage to the D.C. transmission line 3 whilst the inverting station 2 uses controlled rectifiers to give automatic control of current or power. As described, the rectifying station 1 may use series-parallel arrangements of semi-conductor diodes 12, supplied from an alternator 14 via a transformer 11. Automatic regulation of the D.C. on line 3 is achieved by a device 16 which controls the field of the alternator 14 and/or the tappings on transformer 11. The current at the receiving end 2 is monitored by a transductor 26 and compared with a reference 28 so as to adjust the delay angle of the mercury arc or thyristor rectifiers and thus to control the current or power in line 3. A further transductor 41 operates a relay 4 so as to short circuit one or more banks of rectifiers 12 and open contacts 43 in the event of excess current. A telecommunications link may be provided between stations 1 and 2 so that a current limit can be imposed in station 2 following rapid load variations that the rectifying station cannot follow.
Patent GB-773550-A (GB)
Title: Ignition system for internal combustion engines
Inventor: SMITS WYTZE BEYE
IPC: F02P3/10
Filed: 1954-10-26
Abstract: 773,550. Ignition systems. SMITSVONK, N.V. Oct. 26, 1954, No..30878/54. Class 7 (4) In an ignition system wherein a voltage in the range of 20,000 volts from the secondary winding 3 of a coil or magneto is used to charge a condenser 6 connected in parallel with the winding 3, the condenser discharging through a spark gap, such as that between a distributer rotor arm 11 and each in turn of the fixed contacts 12, to supply the ignition voltage to a sparking plug 8, the break-down value of the gap is such that the voltage applied to the plug 8 is substantially lower than that supplied by the winding 3. The separate spark gap replaces the distributer when only a single plug is used. The sparking plugs are preferably of the surface discharge type and the condenser 6 has a capacity of 3,000-5,000 pF so that the tension applied to the plugs is 1,500-2,000 volts. The plugs may be of the normal H.V. kind in which the spark gap lengths have been reduced to 0.1 mm; the condenser capacity and the length of the distri-- buter jump spark gap are adjusted to make the applied potential less than 20,000 volts.
Patent GB-1019700-A (GB)
Title: A process for the production of polybutadiene with improved processing properties
IPC: C08C3/00
Filed: 1964-08-04
Abstract: A solution of, or solid polybutadiene with predominantly cis-1,4-linkages, which has been produced by solution polymerizing butadiene with an organolithium compound or organometallic mixed catalyst (defined), is submitted to a heat treament at a temperature of between 100 DEG  and 220 DEG  C., while the Mooney viscosity remains substantially unchanged.  Where solid polybutadiene is treated, this may be effected by heating lumps, strips or films in a furnace or during the process of drying moist lumps while being subjected to mechanical stress, e.g. in a screw press.  A composition comprising the heat-treated polybutadiene, natural rubber and conventional vulcanizing ingredients is also disclosed.
Patent GB-299465-A (GB)
Title: Improvements in and relating to voltage balancing for systems of electrical distribution
IPC: H02J3/06
Filed: 1928-10-25
Abstract: 299,465. British Thomson-Houston Co., Ltd., (Assignees of Barton, T. F.). Oct. 27, 1927, [Convention date]. Balancing; regulation, automatic.-To balance a three-wire system a single generator driven by any convenient source of power is automatically connected and disconnected with suitable polarity, as required, to either side of the system, and its potential is automatically regulated to maintain balance. The field 17<a> of the balancer 17 is connected by an oscillating switch arm 26 to variable points on a resistance 22 across the outers of the system and its polarity and strength varied by a reversible motor 27. Magnets 34, 35 of a balanced relay respectively connected across the two sides of the system thus cause the potential of the terminal 19 of the balancer 17 to change in sign according to voltage conditions on the system and control its value also. Closing coils of circuit breakers 20, 21 are selectively energized when this potential value is equal to or slightly greater than that of the low side of the system by a polarized relay coil 52 across the balancer terminals and a balanced relay 39, the operating coil 39 of which is across the balancer and the controlling coil 37 of which is placed across the low side of the system by a switch 48 actuated by the reversible motor when the polarity of the field 17<a> is. changed. The circuit-breakers are tripped when the voltage of the side to which the balancer is connected for the time being exceeds that of the balancer, by coils 57, 65 of polarized relays connected across a resistance in the balancer circuit, the controlling coils of these relays being energized only when the appropriate circuit-breaker is closed. The balancer has a differential series field 17b.
Patent GB-225710-A (GB)
Title: Improvements in and relating to the manufacture of hollow bodies from sheet metal
IPC: B21D22/28
Filed: 1923-12-10
Abstract: 225,710. S÷hnge, W. Dec. 10, 1923. Cupping.-In the manufacture of deep hollow bodies from sheet metal by successive drawing operations, the dies are so designed that any portion of a body bent is 'always bent further and never flattened or bent back in subsequent operations. In the manufacture of a rectangular receptacle 8 a blank 9 is drawn into the form 6. This is held by a ring A, Fig. 6, against a die B and drawn by a die C to the form 7 without altering the size of the bottom 4. Another similar operation produces the final form 8. In the case of a hemispherical body 9, Fig. 4, the radius of curvature is progressively decreased through stages 6, 7, 9.
Patent GB-797557-A (GB)
Title: Apparatus for boring tubular work
IPC: B23B51/04
Filed: 1955-10-31
Abstract: 797,557. Boring-heads. BISSEY, P. J. Oct. 31, 1955 [Nov. 17, 1954], No. 31031/55. Class 83 (3). A boring-head 1 comprises guide-surfaces 5, 6 pressed against the bore of the work by fluidpressure acting on the bore from a recess 7. One or each cutter 3, in the form of a triangular prism which may be rotated and turned end-forend to expose each of the six cutting-edges in turn, is secured in a slot 9 by a wedge 12, fixed as by a screw. The cutter is held at an angle α, Fig. 3 (not shown), to the axis of the head against a front-stop 15 by an adjustable backstop 14, and the corners are slightly bevelled (Fig. 3), to facilitate cutting. Two or more guides 5, 6, which may be made of tungstencarbide, cast-iron, bronze, &c., attached as by brazing, are located on the head opposite the exit-recess 7 for liquid or gaseous coolant, e.g. oil, which may be delivered around a solid drawbar 2, or, as illustrated, through the bore of a hollow bar. Channels 7a convey the coolant to the rear of the head, and a flexible packing 16 of leather, plastic, &c. on the bar or head prevents passage of the coolant back along the bar. The cuttings pass rearwardly through a throat 13 in the wedge and head. Relative rotation between the head and work may be produced by rotating either part, or by rotating both in the same or opposite directions.
Patent GB-530102-A (GB)
Title: An improvement in or relating to safety razors
IPC: B26B21/40
Filed: 1939-11-29
Abstract: 530,102. Safety-razors. TETLOW, C. E. Nov. 29, 1939, No. 31045. [Class 30] Cushions comprising hollow tubular members of rubber or like resilient material are placed between the blade a, Fig. 4, and guard plate. The cushions may comprise short lengths of rubber tubing f, which may be circular or D-section and may be perforated to increase their resilience. The tubes may be perforated to receive the locating pins e, or may be placed alongside the central slot a<SP>1</SP>, Fig. 7, as a continuous or interrupted cushion. The cushions may also consist of rubber rings and may be attached to the blade or the guard or they may be loose. In a modification, the cushions are carried by a separate plate placed between the blade and the guard. According to the Provisional Specification, cushions of sponge rubber may be used.
Patent GB-947845-A (GB)
Title: Watch cases
IPC: G04B39/00
Filed: 1962-08-14
Abstract: 947,845. Watch cases. ENICOR S. A. Aug. 14, 1962 [Aug. 17, 1961], No. 31064/62. Heading G3T. A watch case element comprises a central transparent or translucent glass 4 and surrounding transparent or translucent annular member 5 in which a groove 6 is formed opening on to the dial (not shown) of the watch, one of the walls of the groove being inclined to the general plane of the glass 4 and having facets 7 thereon for producing a scintillation effect.
Patent GB-603978-A (GB)
Title: Improvements in and relating to sheet feeders
IPC: B65H3/10
Filed: 1945-11-19
Abstract: 603,978. Feeding sheets. HARROLD, C. W., and HARRIS - SEYBOLD - POTTER CO. Nov. 19, 1945, No. 31081. Addition to 564,876. [Class 100(i)] The sheet-feeding apparatus described in the parent Specification in which sheets S<1> are separated from a pile by a suction head or heads 32, operated by gears 38, 39, 42 so as to cause 'the suction apertures 34 to move in an epicycloidal path and to separate the sheets in conjunction with air blasts delivered by pipes 60 and by presser-feet 61 mounted on an oscillating shaft is modified by changing the proportion of one or more of such parts as the gears 38, 39, 42 and suction head 32 so that the rear part of the sheet is carried upwardly, and the sheet is moved away from the pile lays 59 prior to being forwarded over the lays to the feed rollers 56, 57. Specification 504,489 is referred to.
Patent GB-659573-A (GB)
Title: Improvements in or relating to the hot working of ferrous materials
Inventor: ECCLES GEORGE OSWALD
IPC: B23P15/04
Filed: 1948-11-30
Abstract: 659,573. Forging; making turbine blades. ROLLS-ROYCE, Ltd. Nov. 30, 1948, No. 31092. [Classes 83 (ii) and 83 (iv)] A method for the production of a finished article from a ferrous metal blank by a hot working operation comprises thinly coating the blank, prior to its being heated for hot working, with nickel, chromium or a nickel chromium alloy. A gas-turbine engine blade is made by upsetting, swaging or extruding a stainless, ferrous blank, machining or grinding the surface and then coating the blank to a depth of 0.002 to 0.003 inch with nickel, by plating or spraying. It is then heated and forged in one or more operations. Finally, the plating is removed by mechanical-, or electro-polishing.
Patent GB-1167974-A (GB)
Title: An Improvement in or relating to Globoidal Worm Gearing.
Inventor: HARRISON GEORGE WILLIAM HORNCY
IPC: B23F11/00
Filed: 1967-07-06
Abstract: 1,167,974. Gear-cutting; making globoidal worms. DAVID BROWN GEAR INDUSTRIES Ltd. 27 June, 1968 [6 July, 1967], No. 31174/67. Headings B3A and B3K. A method of producing a globoidal worm adapted to mesh with a globoidal worm-wheel comprises forming teeth on a worm gear blank with a tool, nitride hardening the worm and running it in mesh with a lap, the tool and lap each having helical teeth of involute profile and the number of teeth on each being the same as the number of teeth on the worm-wheel. For both machining steps the worm blank is mounted on the hob spindle of a hobbing machine and traversed slowly past the tool or lap while rotating in timed relation thereto, the tool or lap being mounted on the work-spindle of the machine and the direction of traverse being parallel to that work spindle. For the lapping step lapping compound is applied to the lap and blank.
Patent GB-603999-A (GB)
Title: Motor pump unit
IPC: F04C11/00
Filed: 1945-11-20
Abstract: 603,999. Fluid-actuated valves. JENKINS, R. G. C..(Parsons, J. B.). Nov. 20, 1945, No. 31203. [Class 135] [Also in Group XXVI] A valve, actuated by the delivery pressure of a pump, is movable to one position to establish communication between the pump outlet and a discharge passage and is movable to another position to establish communication between the discharge passage and a relief port leading to a fluid reservoir or fluid supply. The pump 20 is driven by a motor 10 and is of the type having internally meshing gears, the inner gear having six teeth and the outer gear having seven teeth. Bores 27, 31 are in direct connection with the suction and delivery sides respectively of the pump. A spring-pressed valve 32 is slidable within the bore 31 and under normal delivery pressure assumes the position shown in Fig. 4, whereby ports 36a, giving access to a delivery bore 36, are uncovered. Under excessive pressure, the valve is displaced sufficiently to uncover a relief port 39 which communicates by way of a tube 37 with a reservoir 12. A groove 42<SP>1</SP> enables any liquid to the rear of the valve to be relieved to the port 39. When the pump is not operating, the valve assumes the inward position shown in Fig. 2, whereby the relief port 39 is again uncovered, allowing liquid in the system to drain to the reservoir. The suction side of the pump is in permanent connection with the reservoir by way of a tube 25. The interior of the reservoir is in communication with the atmosphere by way of ports 38, 41.
Patent GB-1062458-A (GB)
Title: Polishing or grinding wheel
IPC: B24D13/00
Filed: 1964-08-04
Abstract: 1,062,458. Grinding. W. MANGOLD. Aug. 4, 1964 [Aug. 7, 1963], No. 31212/64. Heading B3D. A grinding or polishing wheel has a woven, braided or fibrous fabric impregnated or coated with a thermoplastic synthetic flexible material, plasticization taking place during operation of the wheel under the heat effect at the periphery of the wheel, whereby the impregnated fabric remains flexible. The thermoplastic material may be based on polyethylene or polyvinyl acetate and is applied in powdered form or is adhered by heating. Alternatively, the thermoplastic material may be applied in a liquid state using plasticizers. A polishing or grinding material, such as aluminium oxide powder, may be mixed with the thermoplastic material.
Patent GB-1013045-A (GB)
Title: Improvements in or relating to apparatus for carrying out electrical tests
Inventor: NASH THOMAS ARTHUR
IPC: G01R27/18
Filed: 1962-08-15
Abstract: 1,013,045. Electric tests and measurements. BRITISH GENERAL ELECTRICAL CO. Ltd. June 17, 1963 [Aug. 15,1962], No. 31360/62. Heading G1U. An apparatus for carrying out a neutral loop impedance test, i.e., determining the impedance between earth and neutral of a single phase A.C. supply, comprises three conductors for connection with three sockets in a supply fitting intended for connection respectively with line, neutral and earth cables of the supply mains, and a transformer the primary of which is connected through a switch mechanism with two of the three conductors, which are for connection with the neutral and line sockets of the supply fitting. The secondary of the transformer is connected by a circuit across two of the three conductors which are for connection with the earth socket and neutral socket of the supply fitting, the circuit including an ohmeter and an automatic cut out device permanently in circuit with the ohmeter. The arrangement is such that should the connections of the line and neutral cables of the supply to the supply socket fittings be erroneously reversed then either the cut out in the ohmeter circuit is automatically operated so that no current passes through the ohmeter, or the current passing through is of a very high order, so that an unusually high reading is given. In the described embodiment of the invention, the line, neutral and earth conductors are connected to the supply by means of a plug 10. A warning light 13 is connected between the line and neutral conductors and a further light 25 between the line and earth conductors, the setting of the ganed switches 15,17 being normally as shown. If the supply is correctly connected both lights should be on; if however line and neutral are reversed then light 25 will remain off. Reversing the switches 15 and 17 will illuminate the light. Actuation of the push button switch 22 causes the supply to energize the transformer 24, the secondary 27 of which energizes the testing circuit. To carry out the neutral loop impedance test the ganged switches 31, 38 and 45 are set in the position opposite to that shown, so that the neutral conductor is connected through lead 43 and the switch 38 to the transformer secondary and the earth conductor 26 is connected through the switch 31 and the meter 29 to the other end of the transformer secondary. The current flowing through the meter will indicate the required impedance. Should an attempt to carry out the measurement be made with the ganged switches 15 and 17 set for reversed supply connections and a circuit established between line and earth either the fuses 28, 36 in the test circuit will blow or the meter 29 will show a very high reading. With the ganged switches 31, 38, 45 in the positions shown tests may be carried out for faulty earthing of an apparatus. The test circuit is established between a secure earth 51 and a clip 41 attached to a suspected faulty earth.
Patent GB-245093-A (GB)
Title: Improvements in thermo-electric batteries
IPC: H01L35/00
Filed: 1925-12-11
Abstract: 245,093. Duch, G. Dec. 27, 1924, [Convention date]. Thermo-electric batteries.-Thermo-couples are arranged in groups in such a way that the output of the whole series approximates to that of a perfect heat engine, Fig. 3, shows one arrangement in which banks of couples e heated at the surface b are arranged so that the junctions of each bank lie in isothermal surfaces a, a<1> - - a<n>, the number of couples in each bank increasing from the surface b. The banks may be joined in series or parallel. Fig. 5 shows an alternative arrangement in which an enveloping couple h working between the extreme temperatures encloses other couples which increase in number as the cold source approaches. Groups of thermo-couples arranged as in Fig. 5 may be used as units in building up the arrangement shown in Fig. 3. The hot junction may be heated electrically or by solid, liquid or gaseous fuel, by chemical or solar energy, or by the waste heat from heat engines &c. The apparatus may be used for obtaining low temperatures by utilizing the Peltier effect by passing a current through the apparatus.
Patent GB-478811-A (GB)
Title: Process for the manufacture of tempered glass
IPC: C03B27/04
Filed: 1937-11-15
Abstract: 478,811. Tempering glass. PUGH, C. T., and ASH, W. Nov. 15, 1937, No. 31405. [Class 56] Glass sheet or plate is tempered, after heating to the plastic state, by subjecting it to jets of air in two stages of pressure, namely, below 2 lb. per square inch and then at any desired higher pressure. In a particular example the glass is cooled by air jets for 1 second at a pressure of 1¢ lb. and the cooling completed at a pressure of 80 lb. In another example the two stages are À33 lb. for 4 seconds followed by 3 1b.
Patent GB-359206-A (GB)
Title: Improvements in or connected with handles for attache cases, bags and the like
IPC: A45C13/26
Filed: 1930-10-21
Abstract: 359,206. AttachÚ case &c. handles. CHENEY, C. W., Factory Road, Soho, Birmingham. Oct. 21, 1930, 'No. 31482. [Class 133.] 'An attache case, bag, or like handle has the attachment links a formed with inwardly-turned hook-shaped ends a3 adapted to engage opposite piercings formed in the side walls of hollow metal attachment members c secured to the case &c. by rivets d<2>. To enable the hooks to be introduced, the metal is preferably slit down to the edges of the part c, ears being left which are turned back after the insertion of the links. The ends of the handle are formed with slots e<2> within which the end bars a<2> of the links can slide to enable the handle to fold flat.
Patent GB-359708-A (GB)
Title: Improvements in and relating to fountain shaving mugs
IPC: A45D27/16
Filed: 1930-10-21
Abstract: 359,708. Shaving-appliances ; piston apparatus for discharging receptacles. PRIEST, H. R., Loudonville, Ohio, U.S.A. Oct. 21, 1930, No. 31548. [Class 131.] A fountain shaving mug comprises a lather receptacle 11 provided at the bottom with exterior screw threads 14 which engage interior screw threads 17 in a shaving cream container 16, the bottom of the lather receptacle being provided with one or more perforations 15 through which the cream is forced when the receptacle is screwed into the container. The container and receptacle are formed with flanges 20, 21 respectively tu facilitate handling.