baber/WOPTO huggingface dataset:
Patent GB-1146292-A (GB)
Title: Process and apparatus for the manufacture of nitric acid
Inventor: HORTON ANTHONY
IPC: C01B21/26
Filed: 1965-12-24
Abstract: 1,146,292. Nitric acid from ammonia. HUMPHREYS & GLASGOW Ltd. 22 Dec., 1966 [24 Dec., 1965], No. 54845/65. Heading C1A. [Also in Division F1] In a process for producing nitric acid by the absorption of nitrogen oxides formed by the catalytic oxidation of ammonia, a first expansion of the absorber tail gas in a gas turbine is preceded by heat exchange with the hot reaction gases leaving the oxidation stage and is followed by reheating the tail gas by a further heat exchange with the reaction gases and a further expansion in another gas turbine, there being no prior or intermediate use of the sensible heat of the reaction gases. The hot reaction gases may be first used to heat the tail gas in a heat exchange stage immediately before the first expansion, then used to reheat the tail gas between the first and second expansions and finally used to preheat the tail gas before the heat exchange stage which immediately precedes the first expansion.
Patent GB-1360668-A (GB)
Title: Frequency control circuits
IPC: G01S13/84
Filed: 1971-11-29
Abstract: 1360668 Transceivers SIEMENS-ALBIS AG 29 Nov 1971 [17 Dec 1970] 55287/71 Heading H3A A frequency control circuit as claimed in claim 2 of Specification 1,285,526 wherein a further monostable circuit 14 having a resetting time greater than the sum of the resetting time of the monostable circuit 9 plus the time required to substantially discharge the capacitor 2 has its input connected in parallel to that of monostable 9, and that output of monostable 14 which produces an output signal when in its rest state being connected via a further resistor 16 to the input of amplifier 4. The control amplifier may be a differential amplifier (Fig. 2, not shown) having a first input connected to the output of discriminator 8 and a second input connected to the output of 14 for adjusting the operative point to the centre of the capture range of discriminator 8. In operation, monostable circuits 9, 14 are set simultaneously by the opening of switch 5, but the output of 14 changes from a positive value to zero and at the end of the pulse duration, the positive value re-appears and capacitor 2 acquires a further charge sufficient to adjust the operative point to the desired discriminator centre frequency.
Patent GB-1400805-A (GB)
Title: Folding of a web
IPC: B31B50/36
Filed: 1972-12-01
Abstract: 1400805 Folding paper PROCTER & GAMBLE CO 1 Dec 1972 [1 Dec 1971] 55591/72 Heading B8R [Also in Division B6] A flexible web is longitudinally folded into the cross-section shown in Fig. 6 by drawing it from pre-folding apparatus (see Division B6) over an elevating board 41, Fig. 5, and boards 43a, 43b. The board 41 tapers forwards from the web width to the width C, Fig. 5 and 6. The web edges drop over the edges of the boards by gravity and the urging of guide rails 42a, 42b, which slope inwardly and forwardly under the boards to produce two fold lines in each lateral half of the web, fragments of which are shown at W. The outermost portions of the web are forced upwards by a member 47a.
Patent GB-1147890-A (GB)
Title: Improvements in or relating to toy winding mechanisms
Inventor: GILLERON ALBERT ANDRE
IPC: A63H17/12
Filed: 1966-12-13
Abstract: 1,147,890. Toothed gearing. MECCANO Ltd. 24 Oct., 1967 [13 Dec., 1966], No. 55877/66. Heading F2Q. A winding mechanism for a toy crane comprises, on a base-plate 10, two parallel walls 11, 12 with axially aligned pairs of slots 13, 16; 14, 17; and 15, 18 forming bearings for shafts 33, 28, 34 respectively carrying gear-wheels 31, 30, 32, the shaft 28 having a hand crank 29 and being axially movable between two positions, and gear-wheel 31 being axially displaced relative to gear-wheel 32 by a distance equal to that between said two positions of the shaft 28 so that the gear-wheel 30 on shaft 28 meshes with gear-wheel 31 in one axial position and with gear-wheel 32 in the other axial position. A detent 27 on a resilient plastics arm 26 engages grooves 35 or 36 in the shaft 28 to hold it in one or other axial position. Shafts 33, 34 are identical. Each has a squared end (38) (Fig. 3, not shown) engageable by a U-shaped detent spring 23 or 24 and a squared portion (39) which receives the gear-wheel 31 or 32. Gear-wheels 31, 32 are identical, and are formed with extended hubs so that they assume one or other of the axial positions according to which way they are fitted to their shafts. A cover plate 46 retains the shafts in their bearing slots.
Patent GB-1322045-A (GB)
Title: Dye salts of the phthalocyanine series
IPC: C09B69/04
Filed: 1970-11-25
Abstract: 1322045 Phthalocyanine dye salts BADISCHE ANILIN- & SODA-FABRIK AG 25 Nov 1970 [26 Nov 1969] 56042/70 Heading C4P The invention comprises dye salts of the general formula wherein Pc is a metalliferous phthalocyanine radical, e.g. of Cu, Co or Ni, X is a basic dye, e.g. of the Rhodamine series, Y is an amine having at least four carbon atoms and at least one ether group, R<SP>1</SP> and R<SP>2</SP> are each H or an aliphatic hydrocarbon radical which may contain one or more hydroxy groups and/or ether groups or R<SP>1</SP> and R<SP>2</SP> together with the N atom of the sulphonamido group may form a heterocycle, e.g. morpholino, m is 1, 2 or 3, n is 0, 1, 2 or 3, p is 0, 1, 2 or 3, n+p is 1, 2 or 3 and m+n+p is 2, 3 or 4. The basic dye may also be a triarylmethane dye. They are prepared by reacting a phthalocyanine compound of the general formula wherein m, n, p, R<SP>1</SP> and R<SP>2</SP> are as above, or an alkali metal or ammonium salt thereof with m moles of a basic dye X and (when n is not zero) n moles of an amine Y. The reaction with the basic dye is preferably the first step. The dye salts obtained are used to colour inks, transparent varnishes and are also used in the manufacture of copying paper and hectographic paper.
Patent GB-1195095-A (GB)
Title: A Structure Forming and Electric Circuit.
IPC: H05K1/02
Filed: 1967-08-21
Abstract: 1,195,095. Variable capacitors. BUNKER RAMO CORP. 21 Aug., 1967 [30 Aug., 1966], No. 56349/69. Divided out of 1,195,094. Heading H1M. A variable capacitor for tuning a printed radio frequency circuit as is described in Specification 1,195,094 is constructed integrally with the circuit and comprises a hole 22<SP>1</SP> in an etched groove (24) (Fig. 1, not shown) in a metal, e.g. aluminium plate 22, dielectric material 26 covering the side of the hole 22<SP>1</SP> and also filling the groove to provide a support for other circuit elements, metallized layer 44 on the dielectric layer to form the stationary electrode, which metallized layer is a continuation of a circuit conductor, metal plug 34 constituting the movable electrode coated with dielectric 38 and supported in a threaded metal plate 32<SP>1</SP> so that it extends into hole 22<SP>1</SP>, plate 32<SP>1</SP> lying on metal plate 32 having a filled etched groove and hole in registry with the groove and hole in plate 22. Alternatively (Fig. 5, not shown) plate 32<SP>1</SP> may be omitted.
Patent GB-1328370-A (GB)
Title: Automatic spectrophotometric absorption analyzer
IPC: G01J3/06
Filed: 1970-11-30
Abstract: 1328370 Photo-electric absorption spectrometers COMMISSARIAT A L'ENERGIE ATOMIQUE 30 Nov 1970 [5 Dec 1969] 56689/70 Heading G1A In an absorption spectrophotometer for determining N-1 components of a fluid sample 5 the grating 16 of an Ebert-Fastie monochromator is stepped into N different positions, one of which corresponds to a reference wavelength unabsorbed by all the components, the other N-1 positions each corresponding to an absorption line of one component, the reference signal being stored and compared in turn with each measuring signal. Infra-red radiation from an incandescent ceramic rod 1 is first stopped down, 2, and passes to the entrance slit 14 of the monochromator via a rotating chopper 10 and filter 12. The sample, e.g. a mixture of fluorinated compounds in nitrogen, circulates. within a vessel 5. The output from a thermocouple 21 is first amplified, 32, then supplied to a phase-sensitive demodulator 33, which in turn feeds an analogue computer 38. This computer stores the reference signal and, after producing a record on a readout device 39 of optical density and component concentration for a given measuring signal, provides an output to the grating motor to step on to the next measuring position. Logic circuitry (22-29) between the computer output and the grating motor and comprising a plurality of AND-gates, flip-flops and relays (not shown) ensures that the stepping motion follows a predetermined sequence. This circuitry also operates to increase the gain of the amplifier 32 for those grating settings where the radiation intensity received by the thermocouple is expected to be low.
Patent GB-1410672-A (GB)
Title: Control circuit for thyristors
IPC: G05F5/00
Filed: 1972-12-20
Abstract: 1410672 Switching systems for consuming apparatus COMPAGNIE HONEYWELL BULL 20 Dec 1972 [28 Dec 1971] 58868/72 Heading H2H A circuit arrangement for gating devices such as thyristors or triacs comprises means for detecting zero voltage conditions across the devices and a photo-electric emitting device responsive to the zero voltage detecting means whereby signals are produced to gate the thyristors or triacs when the voltage thereacross is passing through zero. A load 2 is fed from an A.C. source 3, 4 under the control of a triac 1. A diode bridge 9 is connected across the main electrodes of the triac 1 when a switch 12 is in the operative position T, the output of the bridge 9 being connected to a photo-electric emission diode 14 such that no emission therefrom takes place when the voltage across the triac 1 is passing through zero. With the switch 12 in position T a transistor 17 receives a signal whereby it is prevented from becoming conductive thus a second transistor 16 receives a supply from the A.C. source 3, 4 by way of a circuit 6, 21, 18. When now the voltage across the triac 1 passes through zero no light is emitted by the diode 14 and hence the phototransistor 15 produces no output whereupon transistor 16 becomes conductive and a signal is transmitted to the gate electrode of the triac 1 by way of a resistor 28 such that the trice becomes conductive to supply the load 2. With the triac conductive the diode bridge 9 has no output and the transistor 16 remains conductive to maintain a signal on the gate of the trice. When the switch 12 is in the off position R the transistor 17 is rendered conductive to short circuit a Zener diode 20 thus removing the supply from the transistor 16. In a second embodiment a third transistor and a thyristor are added to the gate circuit whereby the gate signals are produced in the form of pulses instead of in a continuous form.
Patent GB-1224524-A (GB)
Title: Improvements in or relating to gas burners and burner heads therefor
Inventor: MAYLOR THOMAS GEORGE
IPC: F23D14/04
Filed: 1968-12-12
Abstract: 1,224,524. Gas burners. WILLIAM BAILEY (BIRMINGHAM) Ltd. 27 Nov., 1969 [12 Dec., 1968], No. 59091/68. Heading F4T. A burner head 16 which in use is mounted on a gas burner body 20 comprises a first gas/air mixing chamber 43 fed with gas from the burner body 20 and a second gas/air mixing chamber 44 divided from the first mixing chamber 43 by a baffle plate 33, respective air inlet ports 58 and 47 leading into each of the first and second mixing chambers 43, 44, an aperture 34 in the baffle plate 33 for the passage of gas and air from the first mixing chamber 43 to the second mixing chamber 44 and a gas/air outlet port 45, at which the mixture is burnt, communicating with the second mixing chamber 44. As shown, the burner head 16 is formed from opposed front and rear head members 18, 19 respectively, each of which comprises a wall 37 having a conical depression 40 which extends upwardly beyond the first mixing chamber 43 and partly along the second mixing chamber 44. The mixing chambers 43, 44 are formed by the insertion of an inner member 17 into the space formed by the head members 18, 19, the inner member 17 including the baffle plate 33 and a transverse plate 35, the first mixing chamber 43 being formed between the baffle plate 33 and the burner body 50 and the second mixing chamber 44 being formed between the baffle plate 33 and the transverse plate 35. The transverse plate 35 is provided with an aperture 36 of larger size than aperture 34 and in axial alignment therewith. The air inlet ports 58 leading into the first mixing chamber 43 are formed by a space between the burner body 20 and flange members 42 on the head members 18, 19. The air inlet ports 47 leading into the second mixing chamber 44 are formed by a space between rounded lower ends 25 of limbs 21 of an inverted U-shaped head support 16 and tapered ends of a vertical wall 28 of inner member 17. The upper semi-circular segment 22 of the head support 16 defines with the head members 18, 19 two gas/air outlet slots 45.
Patent GB-1304559-A (GB)
IPC: H04N9/68
Filed: 1970-12-14
Abstract: 1304559 Radio receiving circuits MATSUSUITA ELECTRIC INDUSTRIAL CO Ltd 14 Dec 1970 [16 Dec 1969 (3) 23 Dec 1969 29 Dec 1969 [3 Feb 1970] 59363/70 Heading H3Q In a colour television receiver a switch is ganged to the station selection switch, which provides correction of colour saturation and/or phase on each individual tuning channel. In one embodiment, in a colour channel which comprises colour carrier coupling transformers 15, 21, Fig. 3, and an amplifier 19 a switch 23p ganged to the channel selection switch selects from pre-settable potentiometers 17a-17n whereby the gain in the colour channel can be varied for each channel individually. A further potentiometer 22 provides for manual control. In other embodiments (Figs. 4, 5, not shown) the potentiometers control the base bias of a transistor amplifier. In a further embodiment, the preset amplitude control is superimposed on automatic colour control (ACC). The chrominance amplifier comprises transistor 34, Fig. 6, with tuned input and output transformers 32, 15 respectively. Output from a burst gate circuit 36 is applied over a transformer 37 to produce damped oscillations (Fig. 7, not shown) between pairs of burst signals, in a circuit comprising crystal oscillator 38 and adjustable capacitor 39. The damped oscillations are amplified in transistor 43 having tuned output transformer 45, and the colour signal output level is automatically controlled by rectifying thus output signal by means of diode 49, the smoothed output from which is amplified by transistor 52 and applied as variable base bias to the transistor 34. In addition a fixed bias which can be preset for each channel is applied to transistor 34 via resistor 56, from switch 23 and potentiometers 17a ... 17n. In another embodiment the phase of the colour signals is controlled: the arrangement comprises burst gate circuit 36, crystal resonator 38 and pentode oscillator 58 in which the screen grid circuit comprises tuned circuit 60, 61 and is backcoupled to the control grid over capacitor 59. The output is taken from transformer 66 which is tuned by means of varactor diode 69 in series with D.C. blocking capacitor 64, and the bias for diode 69 is derived from switch 73 and potentiometers 72a ... 72n. In a further embodiment, the phase of the colour burst signals is switched before they are applied to the colour sub-carrier oscillator (Fig. 10, not shown), while a yet further embodiment comprises an arrangement including both automatic and manual saturation control (Fig. 11, not shown).
Patent GB-1356460-A (GB)
Title: Tube cleaning bullets
IPC: B08B9/04
Filed: 1971-12-28
Abstract: 1356460 Pipe-cleaning pigs IRA STEPHENS Ltd 21 Dec 1972 [28 Dec 1971] 60260/71 Heading F2N A pipe-cleaning pig comprises a rod 1 mounting alternate relatively small diameter leather discs 3 and relatively large diameter nylon discs 4. The nylon discs 4 are formed with radial slits extending from their outer peripheries to a point located between adjacent leather discs 3. The sectors between adjacent slits are bent out of the plane of the nylon discs. The discs 3, 4 and a cup washer 2 are held compressed together on the rod 1 by metal washers 5.
Patent GB-1279340-A (GB)
Title: Device for passing a rotatable shaft in a fluid-tight fashion through an enclosure wall
IPC: F16J15/40
Filed: 1970-12-22
Abstract: 1279340 Shaft seals GROUPEMENT ATOMIQUE ALSACIENNE ATLANTIQUE 22 Dec 1970 [22 Dec 1969] 60814/70 Heading F2B A device for sealing a rotary shaft 9 in an enclosure housing 1 carrying spaced first and second shaft bearings 5, 7 comprises a first seal 13 between the shaft and housing and an annular body 15 which is freely slideable along the shaft and sealed to the shaft by a second seal 18 and to the housing, as by a metal bellows 16, to enclose a space 22 for a viscous fluid (e.g. an oil or grease), rotation of the annular body being prevented as by splines 21 and the first and second seals each comprising a ring 14, 19 having a groove in which is located an O-ring 14<SP>1</SP>, 191. The rings 14, 19 of U-section may be made of P.T.F.E. The oil or grease is retained in a reservoir by a plug 26 and the pressure inside the enclosure 2 urges the annular body 15 upwardly until the pressure within the space 22 is equal to that in the enclosure. In a second embodiment, Fig. 2 (not shown), the first seal (13) is carried by an axially-movable annular body (35) which is sealed to the housing by an O-ring (37) and prevented from rotation by splines (36). The lower axially-movable annular body (31) in this embodiment is sealed to the bore of the housing by an O-ring (34) and prevented from rotation by splines (32).
Patent GB-1298960-A (GB)
Title: Methods and apparatus for regulating superheaters
IPC: F22G1/16
Filed: 1969-12-31
Abstract: 1298960 Controlling superheaters SULZER BROS Ltd 31 Dec 1969 [4 Jan 1969] 63508/69 Heading F4A The pressure or rate of flow of steam form a superheater 1 is regulated by varying the quantity of injected water. The superheater may be supplied with saturated steam from any suitable source but is described as associated with a petroleum crocking plant in which crude petroleum entering a column 15 is mixed with steam fed through a pipe 19 the resultant reaction products passing to a cooler 21 to which cooling water is fed through a supply 23. The saturated steam passes through a pipe 24 and drum 2 to the superheater 1 while reaction products pass through a duct 25 to an additional processing plant 26. The superheater 1 is heated in a flue gas duct 14 by a firing system 8 supplied with fuel and air through a duct 8<SP>1</SP>. Water is injected through a duct 7 aud valve 4. A drop in the steampressure in outlet line 9 is detected by a pressure measuring device 10 which via a pressure regulator 3 and a signal line 12 operates the value 4 to increase the amount of water injected. A corresponding increase in firing rate is produced by adjusting means 6 operated by a temperature regulator 5. The steam temperature having dropped due to the increased injection is restored to its previous valve by adjusting means 6 via temperature measuring device 11 and regulator 5. In a second embodiment, Fig. 2 (not shown), the rate of flow of steam is regulated by incorporating in a by-pass line (27) from the outlet line 9 a flow-rate measuring device (30) which acts through a flow-rate regulator (28) to adjust the valve 4. In a final embodiment, Fig. 3 (not shown), the quantity of injected water supplied to two injection positions (50), (51) is adjusted in response to the steam pressure secured by a device (10<SP>1</SP>) in the drum 2 by valves (14<SP>1</SP>), (14<SP>11</SP>) connected via linkages to a pivoting three-armed lever (53) where degree of rotation is determined by a temperature regulator (57) and temperature measuring device (56). The pressure measuring device 10 may be alternatively positioned in the saturated steam line leading to the superheater.
Patent GB-679934-A (GB)
Abstract: 679,934. Cables. STANDARD TELEPHONES & CABLES, Ltd. Dec. 22, 1950 [Dec. 23, 1949], No. 32995/49. Class 36. [Also in Group XXV]' An electric communication cable comprises one or more twisted pairs, wherein the wires 1, 2 of each pair are insulated by a single strip 12 of insulation, such as, for example, paper, folded longitudinally about the wires in the form of an S. The strip may be perforated along the centre so that the two wires may be readily separated, and the opposite faces of the strip may bear different colours or markings for identification. The insulation may be applied by passing the wires 1, 2 around pulleys 3, 4, braked by weighted friction belts 5, 6, and then, together with an insulating strip 11 through a guide 9 and heated die 10 which is shaped to bring the wires gradually close together and to roll the strip 11 around the wires. The insulated wires pass around a capstan 14, through a tensioning device 16 and on to a take-up drum 17. The drum 17 is mounted in a twisting yoke 18 which can be rotated about an axis coinciding with the line of approach of the insulated pair to impart the desired twist thereto. Instead of paper tape, textile tapes, plastic films or rubber strips may be used as the insulation.
Patent GB-743667-A (GB)
IPC: G01N3/58
Abstract: 743,667. Testing physical qualities of metals. ARNOLD, F. June 1, 1953 [March 4, 1952], No. 5595/52. Class 106 (2). Apparatus for measuring the resistance of metals to cutting tools by indicating and recording the cutting speed, pressure of feed and time comprises a drilling or other non- reciprocatory cutting machine constructed to accommodate a motor C driving the spindle through a variable speed unit B, a hydraulic ram G beneath the table I to provide the feed lift at any desired pressure indicated by a gauge Q, a tachometer A to indicate and record the speed of rotation of the spindle and a gauge P to indicate the distance through which cutting takes place. Records are made on cards clipped to a spring-loaded rotating drum V controlled by table movement through cable and pulley so that the records correspond to the depth machined which is also indicated by the gauge P controlled by table movement through chain and sprocket. To ascertain the maximum speed at which a cutting action may be made with a given feed pressure, drilling is accelerated until a tendency to " bind " or " burn " is indicated by a vibration recorder X which magnifies the effect of vibrations picked up by a transmitter, comprising a sphere floating between two concave frames, any slight movement completing a circuit. When only a small sample of material is available it is held in the chuck and forced through cutters formed to create the opposite action of a drill, thus the material rotates with the spindle driven by the motor C and the cutters are carried by the table I lifted by the hydraulic ram G.