baber/WOPTO huggingface dataset:
Patent GB-1489858-A (GB)
Title: Process for the purification of ethylene oxide
IPC: C07D301/32
Filed: 1976-06-18
Abstract: 1489858 Purification of ethylene oxide SOC ITALIANA RESINE-SIR SpA 18 June 1976 [8 July 1975] 25400/76 Heading C2C The invention comprises a process for the purification of the crude ethylene oxide present in the dilute aqueous solution resulting from the extraction with an aqueous solvent of ethylene oxide from the gaseous stream obtained by catalytic oxidation of ethylene, characterized by: (a) desorbing said crude ethylene oxide in a desorption column provided with a dephlegmator, thereby to condense in the latter water vapor issuing together with the desorbed crude ethylene oxide from the top of the desorption column; (b) liquefying by compression said desorbed crude ethylene oxide and delivering said liquefied crude ethylene oxide to a fractionating column provided with a reflux condenser, at a point intermediate the top and the bottom, said fractionating column being coupled with said desorption column thereby to use the vapor condensing in said dephlegmator as heating means for said fractionating column and being operated at a temperature of from 50 to 100 C. at the bottom, at a pressure of from 4 to 15 atmospheres gauge-abs. and with a reflux ratio of from 0À5 : 1 to 6 : 1; discharging a gaseous stream containing non-condensable gases at the top of said reflux condenser, a liquid stream of ethylene oxide containing absorbed non-condensable gases and practically free from acetaldehyde at the bottom of said reflux condenser and a liquid stream of ethylene oxide rich in acetaldehyde at the bottom of said fractionating column; (c) treating said liquid stream discharged at the bottom of the fractionating column of (b) to convert at least 50% of the acetaldehyde present therein into high boiling products; (d) delivering said treated liquid stream of (c) to a distillation column provided with a reflux condenser, at a point intermediate the top and the bottom, operating said distillation column at a pressure of from 2 to 6 atmospheres gauge-abs. and at a temperature of from 120 to 180 C. at the bottom and discharging from said distillation column said conversion products of acetaldehyde and the substances having a higher boiling point than ethylene oxide, at the bottom, and a liquid stream containing ethylene oxide and the acetaldehyde unconverted at step (c), at the bottom of the reflux condenser, said liquid stream of (d) being recycled to the fractionating column of (b) at a point intermediate the top and the bottom; and (e) removing said non-condensable gases absorbed in said liquid stream discharged at the bottom reflux condenser of the fractionating column of (b) in a desorption column and recovering from the latter pure ethylene oxide practically free from acetaldehyde.
Patent GB-1349188-A (GB)
Title: Picture generating unit responsive to a video signal
IPC: H04N5/33
Filed: 1971-04-19
Abstract: 1349188 Processing video signals BOFORS AB 19 April 1971 [26 March 1970] 25454/71 Heading H4F The black level of a video display, e.g. for use in conjunction with an infra-red camera for thermal diagnosis in medicine, is controlled by a signal derived from a signal representing the maximum level of intensity with a selected area of the image (i.e. for an infra-red system, the warmest spot). In the embodiment shown in Fig. 2 the video input is applied, via a terminal 9, to a channel 8 which includes a circuit for selecting the signal value range (corresponding to an image temperature range) to be displayed, an amplitude modifier which increases or decreases the overall amplitude of the video signal, and a black level control circuit. The output from channel 8 is supplied to a C.R.T. 10. Vertical and horizontal sync. signals supplied to a terminal 12 are used in a selection circuit 11 to select a part of the video signal representing a predetermined area of the image. Fig. 3 shows the respective circuit 11 in more detail, trigger signals controlling vertical and horizontal scanning being applied at terminals 17, 18, delayed in manually controllable delay circuits 22, 23 and used to trigger pulse generators 24, 25 which generate pulses whose lengths are controlled manually. The resulting pulses are used to gate on a logic circuit 19 to pass only the desired parts of the video signal on line 20 through to output terminal 21. In order to display a bright frame on the display C.R.T. around the selected area, a differentiator and phase shifter 31 is used to produce bright pulses at the vertical edges of the selected area. Alternative methods of selecting the image area within which maximum intensity is measured are also described. The video signal for the selected area is transmitted to a processing circuit 13, Fig. 2, where an output corresponding to the maximum intensity therein is generated for application to the black level control circuit in channel 8. Fig. 5 shows the processing circuit 13 in more detail. It includes a low pass filter 42 and a peak value unit 39 which supplies to a memory circuit 40; e.g. an RC circuit ; a signal representing the maximum intensity level within the selected area. In order to minimize the effect of noise the maximum signal amplitude may be sampled only for a proportion of the tone. The selected signal value range is subtracted in channel 8 from the maximum intensity in order to determine the black level. Where a negative image is displayed the white level is controlled in the same manner as that described above for the black level.
Patent GB-213876-A (GB)
Title: Priming injector for internal combustion engines
IPC: F02N99/00
Filed: 1923-10-12
Abstract: 213,876. Rey, J. G. April 7, 1923, [Convention date]. Void [Published under Sect. 91 of the Act]. Induction pipes, fittings for.-The admission of extra air to the induction pipe through a nozzle b may be controlled by a needle valve e and by a conical-ended piston d which also controls the admission of starting fuel through an inlet p. The piston d, which works over air inlets covered with metal gauze, is connected by a cable k to a button m sliding in a sleeve y on the dashboard. The button m has a lug m<1> in engagement with a notched slot in the sleeve y.
Patent GB-329917-A (GB)
Title: Improvements in or relating to apparatus for controlling the web rolls of printing machines
IPC: B65H23/08
Filed: 1929-08-21
Abstract: 329,917. Hoe & Co., Ltd., R., (Hoe & Co., Inc., R.). Aug. 21, 1929. Feeding webs. - In a web - controlling mechanism comprising friction devices adapted to engage the roll surface, auxiliary friction devices which are normally out of operative relationship with the roll are adapted for supplying compensating pressure to the surface as the diameter of the roll decreases in unwinding. In the construction shown, a running web roll R and a spare web roll S are supported in arms 1 of a rotary roll support. The unwinding web W is controlled by three narrow belts 8 engaging the roll surface, these belts being attached at one end to a rod 13 mounted in lever arms 14 pivoted on a shaft 15, the other arms 16 of the levers being connected to a spring; the belts pass around guide rollers 20, 11 and have weights 12 secured to their free ends. A decrease in size of the roll decrease the area of contact of these belts and hence the braking pressure decreases. By rotating the roll support about a pivot 5, three auxiliary belts 17 are brought into contact with the belts 8 to provide additional pressure on the roll surface. These auxiliary belts also pass over the roller 11 and are provided with weights 21 at their free ends. In a modification, only two auxiliary belts are brought into operation and these bear on the roll surface itself.
Patent GB-1335078-A (GB)
Title: Erecting device for erecting bottom flaps of folding box blanks
IPC: B31B50/54
Filed: 1971-04-19
Abstract: 1335078 Erecting box blanks JAGENBERGWERKE AG 19 April 1971 [11 April 1970] 25665/71 Heading B5D A leading flap 1<SP>1</SP> of a box blank moving through a box gumming machine is folded up by a lever 5, which is held in an operative position by a detent 7 engaging a stop 14 until the edge of the flap 1<SP>1</SP> engages a pawl 6 to pivot the detent. The blank then pivots the lever 5 downwardly while a member 10 completes the folding of the flap. Springs 9 and 12 return the lever and detent to their operative positions after passage of the blank.
Patent GB-704671-A (GB)
Title: Improvements in or relating to the manufacture of telescopic shock absorbers
IPC: F16F9/32
Filed: 1950-10-21
Abstract: 704,671. Making shock absorber casings. ARMSTRONG'S PATENTS CO., Ltd., and SMITH, R. Jan. 21, 1952 [Oct. 21, 1950], No. 25690/50. Classes 83 (2) and 83 (4) Welding.-In a method of making telescopic shock absorber casings an end plate 12, Fig. 2, is attached to a reduced section end 11 b of a casing 11 by electric resistance welding. The plate 12 has an integral frusto-conical portion 12a which fits within the reduced end of the casing. On application of welding current and axial pressure the end 11e, Fig. 3, of the casing is bent further inwards so that its initially external surface engages the lower face of the plate 12. A chamfer 11c on the casing localises the heat generated during welding. A ring 13 or both (not shown) may be simultaneously welded to the upper face of the plate 12.
Patent GB-852960-A (GB)
Title: Process for dyeing cellulosic textile materials
IPC: D06P3/66
Filed: 1957-08-14
Abstract: Cellulosic textile materials are dyed or printed with a dyestuff containing at least one acid solubilizing group and at least one labile substitutent, such as a halogen atom or a sulphuric or phosphoric acid ester group or a sulphonyloxy group, which is bound to a carbon atom of the aliphatic chain of a sulphonic acid alkylamide residue which is present in the dyestuff molecule, and the dyestuff is fixed on the fibre by heating or steaming in the presence of an inorganic acid-binding agent, such as an alkali-metal hydroxide, carbonate, phosphate, borate or perborate, an alkaline-earth metal hydroxide, potassium cyanide or mixtures thereof.  Suitable dyestuffs are of the stilbene, azine, dioxazine, anthraquinone, phthalocyanine and azo (including metal-free and metalliferous azo) series.  Dyeing may be effected in a long liquor or on the foulard.  The dyeing liquor or printing paste may contain neutral inorganic salts such as alkali metal chlorides or sulphates. The printing paste may contain urea and the usual thickeners.  The acid-binding agent may be added to the dyeing liquor or paste at the outset or the impregnated or printed textile may be subsequently treated with the acid-binding agent prior to the heating step.  As an alternative a substance, such as sodium bicarbonate, which yields an acid-binding agent on heating, may be added to the foularding liquor or printing paste.  When the dyestuff contains metallizable groups the dyeings or prints may subsequently be metallized.  Numerous examples are given.
Patent GB-162231-A (GB)
Title: Improvements in line-spacing mechanism for typewriting machines
IPC: B41J19/84
Filed: 1920-09-07
Abstract: 162,231. Fairweather, W. C., (Underwood Typewriter Co.). Sept. 7, 1920. Line-spacing mechanism. - Relates to the detent, the overthrow-preventing dog, and stops for limiting the movement of the line-spacing lever and the pawl-carrier, and is shown in Figs. 1 and 4 applied to mechanism of the kind in which a pawl 7, having a tooth 8 for engaging the linespacing wheel 10, is carried by a slide 5 operated by the line-spacing lever 1, line-spacing being regulated by means of a longitudinally adjustable shelf 13 engaging the pawl. The detent, shown as consisting of a roller 21 mounted on a lever 20, engages the wheel 10 at the tooth space adjacent to that occupied by the tooth 8 at the end of the line-spacing movement, the arrangement enabling the wheel to be replaced by a wheel having a different number of teeth. The lever 20 is pivoted on the pin 15 that supports the shelf 13, and is urged downwards by a free spring 22 which is coiled round the pin and engages an abutment 23 and the lever. An overthrow-preventing dog 24, pivoted on a pin 25 and retained in inoperative position by a spring 27, is formed with a lug 34 in the path of a shoulder 36, Fig. 4, on the pawl and is moved into engagement with the wheel 10 when the pawl is near the end of its stroke. The spring 27 serves also as a returning-spring for the slide 5, the spring being connected to an ear 28 on a plate 29 adjustably secured to the slide by screws 30 passing through slots. The plate is provided with a pad 33 of leather &c. for engaging the abutment 23 to limit the return movement of the slide 5. The linespacing lever 1 moves between adjustable stops 37 consisting of a boss 38, Fig. 6, a coaxial toothed wheel 40 and an eccentric boss 41 provided with a sleeve 42 of rubber &c. The boss 38 is received by a hole in the bracket 39, and the stop is secure'd by screws 46, 45 passing through the bracket and a cover plate 43. A pin 47 engaging the teeth of the wheel 40 prevents the stop from rotating..
Patent GB-1247325-A (GB)
Title: Multiple photo flash bulb unit
IPC: G03B15/04
Filed: 1970-05-28
Abstract: 1,247,325. Multi-flash. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. May 28, 1970 [May 30, 1969], No.25787/70. Heading G2A. A multi-flash bulb unit for seriation ignition of flash-bulbs comprising a plurality of bulbs 1, 2, 3 (only three shown) mutually connected in parallel to an electric circuit including conductors 7, 8, is further provided with one seriesconnected switching element 4 per flash-bulb, the element being actuated by the ignition of its associated flash-bulb to break any electrical connection between at least one of the current conductors 9, 10 of the bulb and the electric circuit. As shown, the bulbs are high voltage bulbs, and each has its own reflector 11 also used to shield the switching elements 4 from ignition energy from other flash-bulbs not associated therewith. In another embodiment Fig. 2 (not shown) having normal flash-bulbs (21, 22, 23), further series-connected switching elements (27) are provided, each of which further elements, upon flashing of the previous bulb, establishes the electrical connection between the next flash bulb and current conductor (26). Each further element is provided in the reflector (28) of the previous bulb, along with its associated switching element (24). In a third embodiment Fig.3 (not shown), the bulbs (31-34) are connected mutually in parallel each with a series resistor (43-45) the resistances of which increase in the sequence of ignition. As before, the switching elements (38-41) are arranged within the reflectors (47) of their associated bulbs. The switching elements 4, (24), (38-41) can each comprise a locally blackened wire or strip having a melting point between 85C. and 400C. The wire may be made of bismuth, cadmium, indium, lead or tin, or of any of these metals alloyed with silver, copper, zinc, aluminium, silicon, magnesium, antimony, nickel or thallium.
Patent GB-198279-A (GB)
Title: Improvements in or relating to apparatus for use in cutting cheese and other plastic or semi-solid substances
IPC: B26D1/547
Filed: 1922-09-23
Abstract: 198,279. Cave, A. Sept. 23, 1922. Cheese cutters.-In cheese &c. cutters of the type comprising a pivoted bow frame 5 fitted with a cutting wire or blade 8 moving in a vertical plane and co-operating with a slotted table 1, the pivot 6 is arranged below the level of the table so that the cutter makes an angular cut. The table 1 is supported upon legs 3, 7 and upon a bracket 4 supporting the pivot 6. The cutter 8 is secured at one end to a hook 9 and at the other end to a clamping-screw 10. The frame 5 is finished with a handle 13. Fig. 4 shows a modification in which the frame has a number of holes 15 to receive the screw 10 to permit of adjustment of the cutter 8. Pins 16, Fig. 3, hold the material against displacement.
Patent GB-616124-A (GB)
Title: Shoe carrier for bicycle brakes
IPC: B62L1/00
Filed: 1946-08-28
Abstract: 616,124. Brake blocks. DURAND, M. P. Aug. 28, 1946, No. 25800. Convention date, Nov. 15, 1944. [Class 103 (i)] A brake block 5 for a bicycle brake is mounted in a carrier constituted by a plate 1 formed with an inwardly folded heel 2 and with tapped bosses engaged by screws 4 having sharp tips which penetrate the base portion of the block and urge it against the heel. The inner surface 3 of the heel may be smooth or striated.
Patent GB-1190818-A (GB)
Title: Improvements in or relating to Electric Incinerators
IPC: H05B3/00
Filed: 1967-06-05
Abstract: 1,190,818. Retarding action of switches. SKOPE ENTERPRISES Ltd. 5 June, 1967 [7 June, 1966], No. 25872/67. Heading H1N. Opening the door 24 of an incinerator 11 moves lever 20 about pivot 21 to cause a pawl 18 to engage a serration 16 and rotate a timing member 12 such that a nose 15 thereon allows a switch 17 to close the circuit to an electric heating element (not shown), member 12 being returned at a substantially constant speed, by a slow-running motor 14 or escapement mechanism, and thus determining the incineration time. Successive insertions of material before member 12 has re-opened the switch 17 cause the pawl 18 to engage successive serrations 16 such that member 12 is rotated further and further away from its initial position, whereby the period of time for which current is supplied to the heating element is increased by a period greater than the time interval between respective insertions. The serrations 16 may vary in length, as shown, such that successive openings of the door 24 cause diminishing increments of extra incineration time.
Patent GB-1504528-A (GB)
Title: Pulse code modulation encoders
IPC: H03M1/00
Filed: 1974-06-11
Abstract: 1504528 Analogue-to-digital conversion PLESSEY CO Ltd 20 May 1975 [11 June 1974] 25881/74 Heading H3H In analogue-to-digital conversion, coarse and fine converters ADC1, ADC2 each produce a digital byte including a sign bit, the bytes being added (or subtracted) in digital adder DA. As shown, ADC1 produces a sign bit and 5 binary weighted amplitude bits, the difference between the output of digital-to-analogue converter DAC and the input analogue IS being amplified by 2<SP>5</SP> before passing to ADC2. Each A-to-D converter comprises a cascade of one-bit stages, producing a binary Gray code, converted to natural binary at G/BC1 and G/BC2. Each stage, Fig. 2, comprises an inverting amplifier A2 of unity gain a comparator CA1 giving the binary output of the stage at DO, and a full-wave rectifier controlled by the output of the comparator, the diodes being forward biased to achieve high linearity and avoid open circuit condition at zero input which would give rise to a spurious output. Relative values of the resistors are given.
Patent GB-1497455-A (GB)
Title: Antistructure agents for curable organopolysiloxane compositions
IPC: C08L83/00
Filed: 1975-06-18
Abstract: 1497455 Hydroxy - methoxy - trisiloxane mixtures; silicone rubber antistructure additives SWS SILICONES CORP 18 June 1975 [20 June 1974] 25939/75 Heading C3T An antistructure additive for silicone rubbers consists of hexamethyl-trisiloxane-1,5-diol and 1 - methoxy - hexamethyl - trisiloxane - 5 - ol, and optionally one or more linear polydimethylsiloxanes having 4-6 Si atoms and OH or OMe end-groups, or one or more cyclic polydimethylsiloxanes having 3-6 Si atoms, the mixture containing at least 5 wt. per cent of Sibound OH groups. Preferably it contains 5-11 wt. per cent of OH groups, 2-4 wt. per cent of OMe groups and has 2À5-7 OH groups per OMe group. The mixture is obtained by hydrolysis of hexamethyl cyclotrisiloxane in water/methanol at pH 2-7, preferably using 0À5-2 mols of water per mol of trisiloxane and 3-10 mols of methanol per mol of water or trisiloxane, whichever is present in the greater amount. In Examples 1 and 4 hexamethyl cyclotrisiloxane, methanol and water in 1 : 5 : 1 molar ratio are heated ipo 0À1 moles of formic acid for 1 hour at 58-65 C or refluxed (68À5 C) ipo 0À1 mole of acetic acid for 17 hours. Cold water is added, and the siloxane layer removed and extracted with 5% aqueous NaHCO 3  then 5% NaCl (Ex. 1) or five times with 5% NaCl. In Example 5 8 phr of the product of Ex. 1 are added to polydimethylsiloxane gum having 0À2 mol per cent MeViSiO units with 40 phr of fume silica and 1À4 phr of bis (2,4- dichlorobenzoyl) peroxide.
Patent GB-1395513-A (GB)
Title: Communications system
IPC: H04J3/06
Filed: 1972-08-02
Abstract: 1395513 Multiplex pulse communication systems POST OFFICE 2 Aug 1972 [11 Aug 1971] 25953/73 Divided out of 1395511 Heading H4L The description is substantially the same as that of the parent Specification 1,395,511, but the claims relate to means for rapidly re-establishing burst synchronization in the event of brief transmission interruptions by predicting the amount of correction required.
Patent GB-813160-A (GB)
Title: Improvements in electrical connectors and electrical connections and methods of making the connections
IPC: H01R13/115
Filed: 1957-08-16
Abstract: 813,160. Making electrical components. AMP Inc. Aug. 16, 1957 [Aug. 16, 1956], No. 25957/57. Classes 83 (2) and 83 (4). [Also in Group XXXVI] Jointing by stamping; cupping.-The ferrule forming portion 8 of a crimpable connector, e.g. a clip connector for receiving a blade, is formed with transverse external ribs 24 and associated internal depressions 26 bounded on both sides by areas of cold, work-hardened metal produced during the formation of the ribs and depressions by dies 28 and 30, Fig. 5, having projections 32 and recesses 34 respectively. When the connector is crimped on to a wire 14, Fig. 7, by dies 40 and 42, Fig. 8, the material of the wire is forced into the depressions and the external ribs 24 may be flattened as shown, or the crimping dies 40<SP>1</SP>, 42<SP>1</SP>, Figs. 11 and 12, may be formed with relieved portions 28 and 50 respectively for the reception of the ribs which then remain upstanding (Figs. 9 and 10, not shown). The connectors are produced from a metal strip by progressive die-forming operations, each connector being joined to the next adjacent connector by a plug 4 as shown in Fig. 6.
Patent GB-1381228-A (GB)
Title: Process for the production of finely powdered aluminium trichloride of uniform particle size
IPC: C01F7/56
Filed: 1973-05-31
Abstract: 1381228 Powdered AlCl 3  SOC ITALIANA RESINE S I R SpA 31 May 1973 [13 June 1972] 26081/73 Heading C1A Finely powdered AlCl 3  is prepared by introducing a stream of AlCl 3  vapour, velocity at least 0-5 m./sec., and a stream of cold inert gas, velocity at least 2 m./sec., into a sublimate precipitator, the ratio of velocities being 1 : 2 to 1 : 10, the gas streams meeting at an angle of 20-50 and the temperature of the mixed gases not exceeding 70 C. The AlCl 3  vapour which may be mixed with other gases may be at a temperature of 200-800 C. The inert gas stream which may be air or nitrogen may be at 5-35 C. The AlCl 3  vapour may be obtained by sublimation of crude AlCl 3 , by reaction of Al 2 O 3  with Cl 2  in the presence of carbon or by reaction of Al with Cl 2 .