baber/WOPTO huggingface dataset:
Patent GB-955278-A (GB)
Title: Suction filters
Filed: 1961-04-22
Abstract: 955,278. Sand filters; backwashing, M. J. MARTIN. April 22, 1961, No. 14650/61. Heading B1D. In response to a timing mechanism, or to a predetermined pressure fall (due to filter clogging) at the inlet of a pump 44, Fig. 1, a valve member 54, Fig. 5, is rotated so that the outer end of its passage 55 is brought into register (as shown) with the filtrate outlet 39 of one of four filter beds of which two are shown in Fig. 1. Thereupon filtrate withdrawn from the other three beds along pipe 43, Fig. 5, is discharged by a pump 44 along pipe 50, Fig. I, continuing as 52, Fig. 5, and upwards through the relevant bed, the resulting soiled liquid being discharged along one of the launders 34, Fig. 1. A valve 49 on the filtrate delivery pipe 48 is closed at this time. Also the rise in level of the water in the relevant filter chamber effects closing of some of the flap valves 30 on a raw water supply channel 24, Fig. 1. Casing 10 is normally covered and is tapered upwardly to increase backwash speed. Preferably the filter beds contain granular calcium silicate as disclosed in Specification 20,016 [Group 1].
Patent GB-741991-A (GB)
Title: Improvements in and relating to tubular structures formed from a thermoplastic
Inventor: BAZIN RENE EUGENE
IPC: B29C65/04
Filed: 1952-06-11
Abstract: 741,991. Seaming non-metallic sheet material. COMMUNICATIONS PATENTS, Ltd. Sept. 11, 1953 [June 11, 1952], No. 14676/52. Class 42 (1). [Also in Group XVII] A method of providing a thermoplastic tube with an end wall comprises forming a flange at an end of the tube, arranging outside and across this flanged open end of the tube a thermoplastic closure-piece and, by a dielectric welding operation, welding the flange to the closure piece. Apparatus for performing this method comprises, as shown, a metal ring, having an upstanding portion '1 and a flange portion 2 and a dielectric heating system. The end face of the ring portion 1 constitutes the lower electrode of the dielectric heating system, the other components being the upper electrode 4 and the high-frequency electric wave generator 3. A tube 5 is passed through the metal ring from below and the end of the tube is folded over the end face of the portion 1. A flat closure piece 7 is arranged over the flanged end of the tube and the upper electrode 4 is lowered to clamp the superposed layers of thermoplastic material between itself and the lower electrode and an appropriate high-frequency electric field is established between the two electrodes for a suitable period of time.
Patent GB-901472-A (GB)
Title: Improved binary half-subtractor circuits
Inventor: MORRIS DAVID JOSEPH
IPC: H03K19/16
Filed: 1960-04-27
Abstract: 901,472. Binary subtractors. ERICSSON TELEPHONES Ltd. April 20, 1961 [April 27, 1960], No. 14676/60. Class 106(1). A half-subtractor comprises two magnetic cores 10, 11 having two input windings each 12-15, reset windings 16, 17 and output windings 18-20, the input windings being arranged in opposition on each core and in series in pairs to inputs X, Y so that X sets 10 and YX<SP>1</SP> sets 11 for subsequent resetting to give outputs at the difference, and difference and borrow, outputs respectively, the other two input combinations setting neither core. Fig. 3 illustrates a minor modification in which each core has only a single output winding.
Patent GB-1526695-A (GB)
Title: Articles comprising layers of iii-v semi-conductor material and methods of making them
IPC: H04B10/43
Filed: 1977-04-07
Abstract: 1526695 Liquid phase epitaxy WESTERN ELECTRIC CO INC 7 April 1977 [13 April 1976] 14740/77 Heading B1S [Also in Division H1] A semiconductor opto-electronic device comprises a substrate 35 bearing a crystalline layer 34 of a solid solution of Ga including at least As, Sb and P, and having a graded lattice constant and bandgap. The grading is achieved by initially depleting a critical amount of P in a growth solution. The device is suitable for use in a Schottky barrier diode as shown, LEDs, PN junction photodiodes and double hetero-structure lasers. A method of forming a laser by LPE is described in detail and includes depositing the various doped layers from corresponding melts contained in wells in a multi-well graphite boat, by lowering the temperature of the melts. A slider containing the substrate slides under the boat from one well to another so that the layers are formed successively on it. The substrate may be GaAs, a metal or an insulator. The semiconductor layers are doped with In, Sn, Ge, Zn, Te, and contact metals are Pd, Pt, Sn, Ni, Au, Cr.
Patent GB-671619-A (GB)
Title: Compensating chuck
Inventor: ASHTON RICHARD ARTHUR
IPC: B23B31/175
Filed: 1950-06-13
Abstract: 671,619. Chucks. SENECA FALLS MACHINE CO. June 13, 1950, No. 14773/50. Class 83 (iii). The jaws 30 of a chuck are actuated by bellcrank levers 40 having arms 45 laterally offset at one side of the chuck axis and engaged by a collar 50 having a swivel support on an inner collar 53 which is formed on or secured to a tube 47 connected to a draw-bar 15. The inner end of the work-piece W engages a live centre 14 and is maintained in contact therewith during the chucking operation by means of a yieldinglymounted dead centre or some similar device.
Patent GB-791800-A (GB)
Title: Improvements in or relating to type-printing arrangements
IPC: B41J1/18
Filed: 1954-05-20
Abstract: 791,800. Typewriters. SAXBY, R. N. Aug. 19, 1955 [May 20, 1954], No. 14782/54. Class 100(4) Letter-spacing carriage-return arrangements. A type-printing mechanism comprises a continuously operated electric motor M which is intermittently coupled to positively letter-space the machine carriage against the tension of a spring. The electric motor is connected through a belt 50 and gear 51, Fig. 5, to shaft 52 and an electrimagnetically actuated clutch 53 transmits the drive through gearing,60, 61 to a crank 63 which rotates a Geneva wheel 64 one step towards the end of each revolution of the gear 61. The wheel 64 is mounted on a spindle 65 which also carries a gear 66 which meshes with a rack 67 secured to the carriage mechanism, so that the carriage advances one letter-space against the tension of the carriage return spring 70, Fig. 7. To return the carriage the rack 67 is pivoted away from the the gear 66 when a line is completed. This is effected by a second clutch 54 operated by an electromagnet LM. Clutch 54 is a half-revolution clutch, the first half controls the tilting of the rack 67 to effect carriage return, the extent of travel of the carriage being controlled by electrical contacts associated with margin stops. Line-feed operation. The second halfrevolution of the clutch effects a line-feed operation through a clutch 54 which rotates a shaft 59, Fig. 7, having a cam 72 coacting with a roller on a pin 73 attached to an arm 74 carrying a line-spacing pawl 78. Relay actions. The type-levers 10 are operated by electromagnets in a manner described in Specification 791,801 and printing impulses to operate the electromagnets 11 are sorted via cross connecting banks of contacts LEV 1, LEV 2 (Figs. 8, 9 not shown). Ink-ribbon feed. The ribbon feed is actuated by an electromagnet having an armature 12, Fig. 2, with a portion 28 having a forked end for engaging a pin 29 on an arm 30 carrying a pawl 33 to engage a ribbon feeding ratchet wheel 32. Ink-ribbon colour shift. Three electromagnets have armatures to effect three degrees of lift to the ribbon medhanism. Framework. The machine comprises a number of sub-assemblies for ease of maintenance.
Patent GB-938570-A (GB)
Title: Improvements in or relating to partitions for boxes
IPC: B65D5/498
Filed: 1960-04-27
Abstract: 938,570. Cartons. F. GOUGH & SON Ltd., and E. G. HULME. April 26, 1961 [April 27, 1960; Oct. 11, 1960], Nos. 14810/60 and 34811/60. Class 18. A stackable cardboard box comprises 2 opposed sides 13 and a partition 27 extending between them, the partition being held erect by tabs 26 engaging in slots cut in the sides such that the tabs pass through the slots and between the double thickness sides, said partition including a ledge 24 extending parallel to the base. The box, which may be of corrugated cardboard, has portions 17 of the end walls 12 removed to allow ventilation, and tabs 29 and associated slots 30 to provide positive stacking. In a modification, the partition has handles cut and folded upwards from the material of the ledges 24 (which provide stacking support), the two vertical walls of the partition being spaced apart. Fig. 3 shows a second modification and in a third modification, the upper ledge 43, Fig. 3, is dispensed with and end tabs included on the lower ledge 42 to provide a single thickness assymetric ledge. In all cases the partition may be stapled in addition to being held by tabs. The sides 13 converge upwardly and the sides 12 diverge upwardly, these slight slopes helping to maintain the box shape when stacked.
Patent GB-1101804-A (GB)
Title: Preparation of soluble thiazolidine carboxylates
IPC: C07D277/06
Filed: 1965-04-07
Abstract: The invention comprises thiazolidine-4-carboxylic acid amine salts of the formula <FORM:1101804/C2/1> where R is -CH3 or -CH2OH and R1 is a methyl or ethyl group, and the preparation thereof by reacting thiazolidine-4-carboxylic acid with a hot solution of the appropriate amine in water or a C1- 5 alcohol.  In examples the thiazolidine-4-carboxylates of 2-amino-2-methyl-1-propanol, 2-amine-2-methyl-1,3-propane diol and 2-amino-2-ethyl-1,3-propane diol are prepared.
Patent GB-981064-A (GB)
Title: Improvements in or relating to open hearth furnace operation
IPC: C21C5/04
Filed: 1961-04-25
Abstract: Steel is produced in an open-hearth furnace by the process which comprises charging the furnace with solid ferrous metal such as steel scrap, directing an oxygen-fluid fuel flame down upon the ferrous metal from a lance in an elevated position, lowering the lance, e.g. to a position 3 or 4 feet above the ferrous metal when the charging is completed so as to melt a major proportion of the ferrous metal, then lowering the lance further to a position just above, e.g. 6 inches above, the bath surface and discharging only oxygen (fuel, e.g. natural gas, being shut off) to remove such elements as C, Si, P and S from the bath during refining. More than one water-cooled lance may be used.  Burnt lime may be charged with the solid ferrous metal. The furnace is preferably also fired alternately from either end using oil as fuel with oxygen enriched air supply during the melting of the ferrous metal and subsequent charging of molten iron. Ferruginous material, such as ferrous metal (iron and steel scrap) or iron ore, may be added to control the exothermic heat generated by the oxidation of C and Si.
Patent GB-996222-A (GB)
Title: Improvements in manufacture of electrical coils
Inventor: SMITH ADDISON ROMAINE
IPC: C25D5/02
Filed: 1963-04-16
Abstract: The uninsulated side edges of an elongated strip conductor material having on one or both faces a coating of insulating material are anodized by winding the strip into a roll, inserting the roll into a bath of electrolyte, and making anode contact along a portion of the side edges of a plurality of the turns of the roll.  Preferably anode contact is provided by an anode supporting member on which at least one roll can be mounted with contact members mounted on the supporting member and extending outwardly therefrom to make knife contact across the turns of the roll.  As shown, an aluminium strip bearing an insulating organic dielectric coating or an anodic oxide film with uninsulated <PICT:0996222/C6-C7/1> <PICT:0996222/C6-C7/2> <PICT:0996222/C6-C7/3> side edges formed by cutting the strip from a wider coated strip is wound into rolls 23.  The rolls are slid on to a rod 20 having a fixed locating member 32 formed with crossed knife edges, the rolls alternating with cruciform contact members 25 having radial knife edges on the arms 27 and the assembly being held together by a backing plate 28 and lock nut. The assembly may be suspended horizontally as shown from a bar 15 or vertically by a hook secured to one end of the rod 20.  A.C. may be used for anodizing or low voltage D.C. with cathodes of lead or stainless steel.
Patent GB-303711-A (GB)
Title: Improvements relating to the platen-carriages of typewriting machines
IPC: B41J29/56
Filed: 1928-05-23
Abstract: 303,711. Fairweather, W. C., (Underwood Elliott Fisher, & Co.). May 23, 1828. Paper-carriages; carriage-shift mechanism; carriage-releasing arrangements; portable machines. -A carriage-centring lock, particularly for portable machines, is mounted on the carriage-shift frame and is provided with means for locking the shift frame or holding the feed-rack in released position or for both these purposes. In the machine shown in Figs. 2 and 3, the carriage 12 runs on a shift frame 15 and is provided with a feed-rack 17 which can be raised by means of a finger-lever 27 to release the carriage. The centring-lock consists of a single member 37 pivoted at 35 to the shift frame and formed with a finger-piece 42, a tongue 43 which is normally out of the path of the carriage, a lug 47 for locking the shift frame, and a lug 50 for holding disengaged the feed-rack. On releasing the carriage and raising the centring-lock, the tongue 43 enters a slot 44 in the end plate of the carriage and holds the carriage in centred position. Further, the lug 47 engages a flange 48 on the framework and locks the shift frame, and the lug 50 holds the feed-rack when the finger-lever 27 is released. The tongue 43 is inclined so as to cause the lug 47 to bind on the flange 48. When the cover 53 is placed over the machine, the carriage is firmly held, since the centring-lock and knob 28 prevent movement to the right and left. When the carriage is moved to the right, the centring-lock drops into the normal position by gravity, aided by the pressure of the feed-rack and, in some cases, by a spring. Specification 154,087 is referred to,
Patent GB-789304-A (GB)
Title: Improvements in electric speed control systems for power plants
Inventor: LAWRY CLINTON CHAMBERLAIN
IPC: H02P23/00
Filed: 1955-05-25
Abstract: 789,304. Automatic control systems for gas turbines. GENERAL ELECTRIC CO. May 25, 1955, No. 15127/55. Class 38 (4). In a speed control system for a gas turbine engine, a D.C. speed error signal applied to a fuel valve positioning motor is modified if (1) the exhaust temperature tends to exceed a critical maximum value; (2) the fuel supply reaches critical maximum and minimum values beyond which compressor " stall " or burner " blow-out might respectively occur, the critical maximum being variable in accordance with compressor discharge pressure and inlet temperature which both influence the incidence of " stall " conditions. A D.C. speed signal from a tachometer 40 associated with the compressor 11 is compared with a throttle-set reference on a potentiometer 26, and the resulting error signal is applied over series resistors 31, 32, 33 to provide a fuel demand input to an amplifier 34 supplying a motor 23 for positioning the fuel valve 19, the input being modified if one of diodes 48, 50, 51 connected in shunt paths across the input is rendered conducting by means about to be described. If 'the exhaust temperature as sensed by thermocouples 43 exceeds a reference set on a potentiometer 46, the output of amplifier 47 to the cathode of diode 48 is such as to cause the latter to conduct if a positive speed error voltage exists on the anode. The resulting voltage drop across resistor 31 reduces the input to amplifier 34 and thus restricts the fuel demand. The cathode voltage of diode 50 derived from a slider 54 on a potentiometer 55 is determined by the relative positions of slider 54 and a slider 63 on a potentiometer 59, the potentiometers being effectively connected in a potentiometer 59, the potentiometer being effectively connected in a bridge circuit energized from a source 58. Slider 63 is positioned in accordance with the fuel valve setting, and slider 54 is positioned by a bellows 52 responsive to the compressor discharge pressure, the evacuated bellows 56 providing ambient pressure compensation. Thus, at a predetermined maximum fuel flow, as modified according to the compressor discharge pressure, the voltage applied to the cathode of diode 50 will become negative, so that the diode conducts to cause a reduction in the fuel demand input to the amplifier. A temperature-sensitive resistor 70 in the compressor inlet 12 is connected across a resistor 60 in the bridge circuit for providing variation of the maximum fuel flow with changes in inlet temperature. The anode of the reversely-connected diode 51 is so connected in the bridge circuit that it responds largely to the position of slider 63. Thus, at a predetermined minimum fuel flow, the anode will be positive relative to a negative speed error voltage on the cathode demanding a further reduction in fuel flow. The valve then conducts in a sense as to compensate for this demand.
Patent GB-443094-A (GB)
Title: Improvements in or relating to the removal of sulphur compounds from gases
IPC: C10K1/18
Filed: 1934-05-18
Abstract: <PICT:0443094/III/1> Wash oil used for removing benzole and oil-soluble sulphur compounds such as carbon disulphide and thiophen compounds from gases is regenerated by distillation with direct steam at sub-atmospheric pressure and a temperature below 100 DEG  C. Spent oil is pumped from the base 4 of a board-packed scrubber through heat-exchangers 6 . . 9 to a still 10 supplied with exhaust steam from engines driving oil pumps 5, 13 or with fresh steam and operating, e.g. at 200 mm. absolute pressure and 75--80 DEG  C.  The hot stripped oil is returned via heat-exchanger 6 and a cold water cooler 14 to the scrubber.  The still vapours pass through a dephlegmator 16 and heat-exchanger 7 to a condenser 17 from which benzole and water are led away through a barometric leg 19.  High pressure steam draws the vapours into an ejector 20 maintaining the required vacuum in the still, and the combined vapours pass through oil heater 8, a cold-water condenser 22 and a washer 23 employing benzole, e.g. that separated in condenser 17, stripped oil, &c.  The gases may then be returned to the inlet of the gas scrubber.  In a modification, the spent wash oil is divided into two streams, one flowing to exchanger 6 and the other to exchanger 7, both streams then re-uniting to enter heater 8.  The proportion of oil passing to exchanger 7 may be automatically controlled to maintain constant the temperature of the vapours passing to condenser 17, or any degree of cooling of these vapours may be effected to alter the quality of the benzole produced.  A steam driven mechanical vacuum pump may replace the ejector 20. Specification 430,989 is referred to.
Patent GB-639367-A (GB)
Title: Manufacture of halogenated amines
Filed: 1948-06-04
Abstract: 2 : 6-Dichloro- and 2 : 6-dibromo-4-nitraniline are manufactured by chlorinating or brominating p-nitraniline-o-sulphonic acid in aqueous acid (e.g. sulphuric or hydrochloric acid) solution in two stages, the first at such low temperature (e.g. 0-10 DEG  C.) that the p-nitraniline-o-sulphonic acid is converted substantially into 6-chloro- or 6 - bromo - 4 - nitraniline - 2 - sulphonic acid, and the second at sufficiently high temperature (e.g. 50-60 DEG  C.) to effect the replacement of the sulpho group by chlorine or bromine. Detailed examples are given.  p-Nitraniline-o-sulphonic acid is obtainable by sulphonating p-nitraniline with concentrated sulphuric acid (in which case the sulphonation mixture, after dilution with water, may be directly subjected to the halogenation process), or by sulphonating p-nitrochlorobenzene with oleum and treating the resulting 5-nitro-2-chlorobenzenesulphonic acid with concentrated ammonia solution.
Patent GB-930349-A (GB)
Title: Control of liquid distribution
Inventor: DAVIS ALBERT HENRY
IPC: F16K31/122
Filed: 1961-04-27
Abstract: 930,349. Valves. ZWICKY Ltd. April 27, 1962 [April 27, 1961], No. 15286/61. Class 135. A sleeve valve 18 controlled by two deeply corrugated diaphragms 72, 74 clamped to it and to the valve housing is adapted to regulate the downstream pressure in a coaxial liquid pipe line, the diaphragm 72 being subjected on its concave side to the constant but adjustable air pressure in a reservoir 78 while the concave side of the diaphragm 74 is subjected to the liquid pressure downstream of the valve. Liquid enters one end 56 of the valve casing from a supply pipe and flows through curved annular passages 60, 50 to the interior of the sleeve 18 through an annular port 80. Further ports 76 in the sleeve permit the downstream liquid pressure to act on the concave side of the diaphragm 74 to tend to close the valve against the air pressure acting on the diaphragm 72. Air spaces 85, 86 on the convex sides of the diaphragms are connected by a pipe 88 or by a passage in the valve housing and a cock 90 may be provided to enable failure of either diaphragm to be discovered. To prevent leakage when the valve is closed, an annular rib 84 abuts a flexible annular seat 82 while leakage into the air spaces is prevented by gland rings 24, 34 and 46. The reservoir 78 may be changed through a valve 79 of the kind known by the Registered Trade Mark " Schrader " and the diaphragms may be of fibre-reinforced synthetic rubber. In an alternative construction, the two diaphragms are arranged with their convex sides towards each other, the space between them being vented, and one end of the sleeve co-operates with a flexible annular seat clamped to a streamlined cone by a nut. In either construction, the valve may have a bore of Venturi configuration to enable the pressure at a point remote from the valve to be controlled.
Patent GB-281957-A (GB)
Title: Improvements in or relating to inserted tooth milling cutters and like rotary tools
IPC: B23C5/24
Filed: 1927-06-08
Abstract: 281,957. Imray, 0. Y., (O.K. Too! Co., Inc.). June 8, 1927. Milling - cutters. -- An inserted toot milling-cutter or like rotary tool comprises a body 1 having apertures 3 for receiving inserted blades 4, the apertures being inclined to axial and radial planes at angles 4r and s to provide rake for the face cutting-edges 4<a> and peripheral cutting-edges 4<b> respectively and the apertures and blades being tapered in the axial direction of the tool so that the blades may be secured by friction only. One face of the apertures and one side of the blades is provided with mterengaging serrations 5 to increase the retaining friction and allow the blades to be adjusted radially for regrinding. The tool shown has a central aperture 2 for a mandrel but a face nlilling-cutter is described having a tapered shank for insertion in a machine-spindle.
Patent GB-388620-A (GB)
Title: Improvements in and relating to high-tension electric switches
IPC: H01H33/70
Filed: 1932-05-30
Abstract: 388,620. High-tension switches. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Soc. Generale de Constructions Electriques et Mecaniques Alsthom; 146, Avenue des Champs Elysees, Paris.) May 30, 1932, No. 15318. Convention date, May 29, 1931. [Class 38 (v).] Arc-rupturing devices.-On separation of a hollow cylindrical movable contact 3 from a fixed contact 4 within a chamber 2 that is closed by an insulating plate 7, the are formed vaporizes some of the oil, water, or other liquid within the chamber 2. Only when the contact 3 is sufficiently withdrawn to expose the outlets 9 above the guide 8 does the pressure in the chamber cause a stream of vapour and liquid to pass through the bore of the movable contact and extinguish the arc.
Patent GB-271262-A (GB)
Title: Improved screen for telephones
IPC: H04M1/11
Filed: 1926-06-18
Abstract: 271,262. Dunand, E. L. June 18, 1926. Desk and table sets.-A screen for pedestalled desk telephones comprises a fabric or leather. covered frame 1 pivoted on the pedestal by arms 2 terminating in spring clips 3. Wheels 5 or. other runners are provided on the bottom edge of the frame. In a modification the screen may be formed with a hood and the connecting arm arranged vertically and axially in regard to the pedestal.