baber/WOPTO huggingface dataset:
Patent GB-1166075-A (GB)
Title: Photographic Silver Halide Emulsions
Inventor: MCBRIDE CLARENCE EDWARD
IPC: G03C1/49
Filed: 1966-11-10
Abstract: 1,166, 075. Photo-developable photographic silver halide emulsions. EASTMAN KODAK CO. Nov. 10, 1966, No.25124/69. Divided out of 1,166,074. Addition to 1,059,782. Heading G2C. In a process for making photo-developable photographic silver halide emulsions, the silver halide grains are formed in the presence of an organic thioether silver halide solvent which in 0À02 molar aqueous solution at 60 ‹C. can dissolve more than twice the weight of silver chloride that dissolves in water at 60‹C., excluding the thioether silver halide solvents described in Specification 1,059,782. Specified thioether solvents are 2:2<1>-thiodiethanol and 10:13-diaza-3:20-dioxa- 9:14-dioxo-6:17-dithia-docosane. The solvents may be added at any stage during preparation of the emulsion before the grains have attained their ultimate size and shape, i. e. prior to or during ripening. The grains may also be precipitated in the presence of lead ions and the emulsion may also contain halogen acceptors such as 1-n-butyl- 1:2:5:6-tetrahydro-1:3:5-triazine-4-thiol and additional water-soluble halide.
Patent GB-600124-A (GB)
Title: Improvements in keying circuits employing thermionic valves
IPC: H04L27/04
Filed: 1945-09-27
Abstract: 600,124. Code telegraphy. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and NEILSON, P. J. Sept. 27, 1945, No. 25137. [Class 40 (iii)] [Also in Group XL (c)] To avoid key clicks when an alternating current of audio or higher frequency is interrupted for telegraphy, a multi-grid valve is employed with the A.C. applied to one grid and the output taken across two output electrodes which are excited in phase opposition. As shown, A.C. is applied between earth and the third grid g<3> of a pentode valve V; and output is taken by a centre-tapped transformer T connected across the anode a and the second grid g2. The first grid g1 is connected to earth through a high resistance R4 and a negative bias source, the cathode being earthed through low resistance R1, R2, R3. The key K is connected between the grid g1 and a tapping on the resistance R2. When the key K is open, the valve is blocked, and when closed the valve is operative and A.C. appears at the output T. The bias on the grid g3 is such that the currents to anode a and grid g2 are equal when no A.C. is applied. A condenser C may be connected between the anode a and the grid g1 to equalize the capacity transfer from the grid g1 to the anode a and grid g2 respectively. A centre-tapped impedance may replace the transformer T.
Patent GB-772347-A (GB)
Title: Improvements in cyanine dyes, processes of preparing them and photographic emulsionscontaining them
IPC: C09B23/02
Filed: 1955-09-02
Abstract: Cyanine dyes of the general formula:-<FORM:0772347/IV(b)/1> wherein R is an alkyl or substituted alkyl group, R1 is hydrogen or an alkyl or aryl group, d and n are 0 or 1 and Z completes a heterocyclic nucleus, are prepared by condensing a compound of the formula:- <FORM:0772347/IV(b)/2> with one of the following compounds:- <FORM:0772347/IV(b)/3> wherein R2 is an alkyl or aryl group, R3 is an acyl group, R4 is an aryl group and X is an anion.  R may be methyl, ethyl, n-propyl, n-butyl, b -hydroxyethyl, b -methoxyethyl, carbethoxymethyl or benzyl and R1 may be methyl, ethyl, n-propyl, n-butyl, phenyl or tolyl.  A list of nuclei which Z may complete is given including thionaphtheno - 71 : 61 : 4 : 5 - thiazoles, isoquinolines and benzimidazoles.  In the examples, Z completes a benzthiazole, 5 - chloro - benzthiazole, naphthothiazole, benzoxazole, naphthoxazole, benzselenazole or 2 - quinoline nucleus. Specifications 412,309, 533,425 and 538,857 [all in Group IV] are referred to.
Patent GB-1523536-A (GB)
Title: Responsive glass compositions and electrodes
IPC: G01N27/36
Filed: 1976-06-18
Abstract: 1523536 pH-responsive glass OWENS-ILLINOIS Inc 18 June 1976 [19 June 1975] 25265/76 Heading C1M A glass composition for use in pH-responsive glass electrodes consists essentially of, in mole per cent: Li 2 O 30-40 SiO, 50-60 La 2 O 3  2-8 Ta 2 O 5  2-8 Cs 2 O 0-3 the total of Li 2 O + Ta 2 O 5  being at least 34.
Patent GB-502488-A (GB)
Title: Improvements in or relating to devices for delivering liquids in measured quantities by volume
IPC: G01F11/16
Filed: 1937-09-17
Abstract: 502,488. Delivering measured quantities of liquid. COUGHTRIE, O. Sept. 17, 1937, No. 25335. [Class 106 (v)] Measured quantities of liquid are discharged from a receptacle 10, Fig. 3, in which the liquid level is maintained constant by a barometric feed device, by raising a measuring cup 30 until ports 32 in a sleeve 28 at the centre of the cup register with ports 34 formed above the liquid level in a tubular rod 16 on which the sleeve slides. The rod 16 carries a cap 14 whch is secured against a rubber ring 26 at the top of the receptacle 10 by a nut 20 engaging a rubber washer 22 below the receptacle 10. The nut 20 is formed with an aperture 86 smaller than the bore of the rod 16 to retain by capillary action any liquid draining from the wall of the bore after the main discharge of liquid has taken place. The cap 14 carries an air tube 64. The cup 30 is operated by a handle 56 on a shaft 42 carrying arms 46 formed with grooves 48 engaged by pins 50 on a flange 52, at the top of the sleeve 28. The flange 52 has flat sides engaging the arms 46 to prevent rotation of the sleeve 28. The cap 14 is formed with an extension 66 supporting the cork 70 of an inverted bottle feeding liquid to the receptacle 10 through a tube 74 when a hole 80 extending through the tube 74 to an air pipe 78 is exposed. Fig. 5 shows another construction in which the cap 14 and receptacle 10 are secured together by a slotted head 164 screwing on the upper part of a rod 160 having its lower part, which is of greater diameter than the upper part, bored and fitted with a retaining member 166 engaging the bottom of the receptacle. A discharge nozzle 178 of somewhat " figure eight " formation is secured at the bottom of the rod 160. When the cup 30 is raised to discharge liquid, air is drawn through ports 174 in the lower part of the rod 160 into the annular space between the sleeve 28 and the upper part of the rod and the discharge of this air when the cup is lowered removes liquid adhering to the interior of the rod. Any liquid failing to escape lodges on the ledge at the top of the nozzle 178. Fig. 7 shows a further construction in which the cap 14 and receptacle 10 are secured together by screws 286 and the cup 30 is raised by lifting a rod 260 until a stop collar 266 engages a flange 268 on the cap 14 when the ports 32 in the sleeve 28 are above the top of the discharge tube 36. A cotton sealing disc 261 is preferably provided at the upper internal end of the sleeve 28.
Patent GB-1272996-A (GB)
Title: Dynamic convergence circuits
IPC: H04N9/28
Filed: 1969-05-19
Abstract: 1,272,996. Cathode-ray tube circuits. R.C.A. CORPORATION. 19 May, 1969 [22 May, 1968], No. 25375/69. Heading H4T. In a dynamic vertical convergence correction system for a colour television display cathoderay tube the convergence coils are supplied with separate, individually adjustable, correction waveforms derived from respective circuits during alternate halves of the vertical scanning waveforms. Referring to Fig. 1, a (partially integrated) vertical scanning sawtooth derived from the vertical deflection circuits 11 is supplied via capacitor 13 and wave-shaping arrangement of resistor 15 and diode 17 to one end of the red and green convergence coils 23, 25 and is also differentiated by means of capacitor 31 and resistances 33, 35 to produce a substantially sawtooth voltage across 35. During the positive portion of the scanning sawtooth (i.e. the portion corresponding to the top half of the picture) diode 17 is non-conducting whilst diode conducts and brings the common end of the convergence coils to earth potential so that current flow therethrough due to the scanning sawtooth is prevented. However, because of the low impedance to earth of the common end of the coils the sawtooth across potentiometer 35 provides an adjustable correction current waveform which may be differentially adjusted by potentiometer 29 and which is terminated during the negative portion of the scanning sawtooth corresponding to the bottom half of the picture when diode 21 becomes non-conducting. At this point diode 17 conducts and the scanning sawtooth suitably shaped by diode 17 and resistor 15 provides a current flow through the coils, potentiometer 19 providing a master control and potentiometer 27 a differential control. Thus the (different) corrections required during the two halves of the scan may be independently controlled for the red and green convergence coils. The blue convergence coils 49 are supplied from potentiometer 47 which controls correction in the top half of the raster and by potentiometer 45 which controls correction in the bottom half of the raster.
Patent GB-193451-A (GB)
Title: Improvements in and relating to the manufacture of rubber
IPC: C08J3/26
Filed: 1921-09-24
Abstract: 193,451. Schidrowitz, P. Sept. 24, 1921. Latex, treating; vulcanizing. - A solution or colloid suspension of vulcanized rubber in water is obtained by submitting latex to vulcanization with sulphur or the like under such conditions that coagulation is precluded. The latex must be rendered alkaline to inhibit coagulation by the addition of alkali as ammonia, or a base as piperidine, or by the use of a vulcanizing-agent such as an alkaline polysulphide. Coagulation may also be prevented by dilution of the latex, or by the addition of a colloid as casein, which also renders the final product less liable to be tacky. Several examples are given in the Specification, of which the following is typical :-1.6 ccm. of ammonia is added to 100 ccm. of latex containing about 30 per cent of rubber, and a cream consisting of 3 gm. of sulphur, 1 gm. of zinc oxide, 1 ccm. of piperidine in 35 ccm. of water is added. The whole is placed in a vulcanizer and vulcanized, half an hour rise to 40 lbs., and half-anhour at 40 lbs., and the liquid is strained. Coagulation may be effected by the addition of an acid, or by evaporation of the liquid, and the coagulum may be washed, milled, sheeted &c. Articles may be coated with the liquid and dried, or sheets made by building up films. Fillers, dyes &c. may be added at any stage. Specification 18497/10 is referred to.
Patent GB-1063647-A (GB)
Title: Two-speed power tool
IPC: B23Q5/14
Filed: 1964-06-19
Abstract: 1,063,647. Drilling. BLACK & DECKER MANUFACTURING CO. June 19, 1964 [June 20, 1963], No. 25389/64. Heading B3C. [Also in Division F2] In a two-speed power tool such as a portable electric drill, constantly driven gears 30, 31 rotatable and axially movable on an output (chuck) spindle 32 are respectively axially urged, by compression springs 41, 39, to engage dog pairs 37, 38 thereon with a transverse pin 35 press-fitted in the spindle, and a cam 45 carried in a gear casing 15 radially of the gears is manually rotatable to selectively axially move either one of the gears away from clutching engagement with the pin against the respective spring and to allow spring-urged clutching engagement of the other of the gears. The cam 45 has an intermediate position in which it holds both gears disengaged for Neutral so that one gear cannot be engaged until the other is fully disengaged. The cam 45 is integral with a shaft 44 and is preferably moulded from an anti-friction material such as nylon. The shaft 44, urged inwardly of the casing by a spring 47, retains, by an inclined slot 48, a handle 49 which when not used for rotation of the cam snaps down into a casing recess 52 so as not to interfere with the securing of conventional, e.g. sawing, jig sawing, sanding or hedge trimming, attachments. When the handle is snapped down a casing protuberance 53 engages an opening 50 in the handle to prevent inadvertent shifting thereof. Abutment tabs 54 on the handle engage a wear washer 55. The gears 30, 31 respectively constantly mesh gears 29, 28 on an intermediate shaft 25 having a further gear 24 meshing a gear 23 formed on an input motor spindle 21. The springs 41, 39 compress axially within themselves.
Patent GB-338500-A (GB)
Title: Process of reactivating contaminated adsorptive carbon
IPC: C01B31/08
Filed: 1929-05-15
Abstract: 338,500. Metallges. Akt.-Ges. June 8. 1928, [Convention date]. Divided on 313,154. Carbon.-In the process of reactivating carbon in lump form, the pieces of carbon are disposed in a compact mass without intermingling movement in a container, e.g. the adsorber, part or the whole being preheated, and are then treated with gas or gas and vapour mixtures having a content of less than 8 per cent of oxygen, the preheating being then discontinued and the treating gas supplied at a temperature not substantially greater than 250‹C., and preferably below 200‹C., whereby a localised reactivation zone is formed which travels in the direction of flow of the gaseous medium. The mass of carbon may be moved through the reaction vessel, without relative disturbance of its parts, at a rate corresponding to the progress therethrough of the zone of reaction;
Patent GB-1038674-A (GB)
Title: Improvements in or relating to brake discs
IPC: F16D65/12
Filed: 1963-06-26
Abstract: 1,038,674. Brake discs. DUNLOP RUBBER CO. Ltd. June 26, 1963 [July 19, 1962], No. 25398/63. Heading F2E. A brake disc comprises an inner dished portion 1 having an annular brake flange 2 rigidly secured thereto, the junction between the dished portion and the brake flange being reinforced at 14 on the open side of the dished portion so as to offer equal resistance at all points to deformation of the brake flange due to its radial expansion under the influence of braking heat. A groove 15 may be formed in the flange. Radial or axial flanges may replace the reinforcement 14.
Patent GB-483821-A (GB)
Title: Improvements in and relating to processes of recovering sulphuric acid from sulphuric acid solutions of sulphates
IPC: C23G1/36
Filed: 1936-09-19
Abstract: <PICT:0483821/III/1> Sulphuric acid is recovered from a sulphuric acid solution of sulphates by concentrating the solution by evaporation in vacuo to an extent sufficient to obtain a precipitation of a major portion of the soluble sulphates in solid granular form, discontinuing the concentration before reaching the point at which precipitation of the soluble sulphates in a finely divided form occurs, and effecting separation of the partially concentrated acid from the granular solids.  Thereafter, the acid may be subjected to further concentration in vacuo, to precipitate further finely divided solids from which the acid is thereafter separated.  A byeproduct sulphuric acid solution from the production of titanium oxide is continuously fed from a storage tank 1 into one or more vacuum evaporators 3, where concentration to about 55-60 per cent free sulphuric acid at a temperature below 200 DEG  F., say 190 DEG  F., takes place.  The resulting slurry passes to an agitated cooling tank 5, and from thence to one or more settling tanks 8, 81 which are used in sequence.  When one of the tanks 8 has been charged, the contents are allowed to stratify, the clear acid being pumped to a tank 12, whereupon the slurry is repulped with the feeding of weak acid from the tank 1. The repulped slurry is again allowed to stratify the clear acid being fed to a tank 18, and the slurry, with the addition of a further small quantity of acid from the tank 1, is pumped into an agitated slurry tank 21 and from thence through a line 23 to a rotary vacuum filter.  The filter cape may be washed with weak acid from the tank 1 or with a saturated solution of iron sulphate, the displaced acid being pumped through a separating chamber 27 and a receiver 29 to a filterate tank 32.  The acid from tank 32 may be returned to the tank 18 and the acid from tank 18 may be fed together with acid from the tank 1 into the evaporators 3. The 55-60 per cent acid from the tank 12 is further concentrated in a vacuum evaporator 40 to about 80 per cent or higher, a temperature of 250-300 DEG  F. being employed. After concentration the acid is fed to an agitated cooling tank 41 and from here to one or more settling chambers 43.  The decanted acid is pumped away by a pump 45, and the slurry is returned to the settling tanks 8, 81.  The slurry may be repulped as in the preceding step.  According to a modification the filtration step is omitted, decantation only being employed, or the slurry may pass directly from the evaporators to the filter.
Patent GB-652563-A (GB)
Title: Improvements in stud fastenings
IPC: A44B3/04
Filed: 1948-10-01
Abstract: 652,563. Studs. THOMSON. H. A. Oct. 1, 1948, No. 25625. [Class 43] A stud having a pivoted head comprises a flat, wire base 1, 2 with two upright wire posts 3, 4 extending therefrom, the inwardly-bent upper ends 5, 6 of said posts, being pivotally mounted in parallel bores 9, 10 ruespectively in a plate 7. The plate 7 is provided on opposite edges with transverse and longitudinal grooves 11, 15 respectively into which the posts 3, 4, which are resiliently forced apart by the plate 7, snap to hold the plate in either the horizontal or the upright position. Instead of lying in the separate bores 9, 10 both bent ends 5, 6 of the posts may be placed in the bore 9.
Patent GB-305444-A (GB)
Title: New or improved warp let-off mechanism for looms
IPC: D03D49/06
Filed: 1928-04-24
Abstract: 305,444. Turner, J., and Drake, F. C. F. April 24, 1928. Divided on 300,793. Warps, tensioning.- The warp 1 passes round a spring or weight pulled pulley 7 connected to a lever 8 carrying a staple 11 arranged to grip the warp when the lever falls. The mechanism is especially applicable to multiple shuttle looms for weaving narrow webbing.
Patent GB-635939-A (GB)
Title: Improvements in and relating to closing devices for gates and doors of all kinds
IPC: E05C3/24
Filed: 1947-09-26
Abstract: 635,939. Catches. MILLY, L. C. E. Sept. 24, 1947, No. 25947. Convention date, Sept. 26, 1946. [Class 44] In a door or like catch, a cam 1, Fig. 2, is mounted on the edge of the door and provided with inclined surfaces 2, 3, which co-operate with a roller on the doorpost. Two plates 32, 33, Fig. 3, fixed to the same spindle 7 as cam 1, are coupled by studs 12, 13, which with two pivotally mounted spacers 18, 19, constitute abutments for a pair of springs 22, 23, housed on guides 20, 21. When the door is open, a heel 9 on cam 1 engages a stop on the case 10 to retain the springs 22, 23, just over centre. On closing the door, the roller, which is guided by a slot 14 in the case 10, engages surface 3 to rotate the cam and springs over centre, the springs then expanding to cause surface 2 to engage the roller and press the door to the closed position. A lever 17, keeps the door closed, by co-operating with a heel 8 on the cam 1. For releasing the lever 17, a cable is fixed thereto at 24, and is operable by pressing a trigger concealed in the outer handle 26, or by a spring pressed button on the inside of the door. The outside trigger may be rendered inoperative by rotating the inner button through 45 degrees, so that lugs thereon prevent movement of the cable. To limit the speed of rotation of the cam, friction material 29 may be inserted, the pressure on the case 10 being regulated by a spring 30. In alternative arrangements, the parts may be reversed, the roller being mounted on the door and an auxiliary lever on the door acting on the locking lever, which is mounted on the door post, or the remote control mechanism for the locking lever 17 may be a slide or a finger moving longitudinally. Also an auxiliary locking device of known type can be incorporated with the catch.
Patent GB-319136-A (GB)
Title: Combined plow and soil pulverizer
IPC: A01B17/00
Filed: 1928-09-10
Abstract: 319,136. Davidson, J. B. Sept. 10, 1928. Single and multiple furrow ploughs; rotarytool implements; tools, construction of.-A pulverizing attachment for tractor ploughs comprises one or more housings for vertical blade. carrying shafts and means for driving the shafts from the tractor engine, special means being provided for lubricating the driving-mechanism. The pulverizer frame comprises a box-like member 14 having a detachable cover 16 and carrying the housings 17, 40, a flange 19 projecting upwards from each housing. Upper and lower roller bearings 20 are provided for the vertical shafts 21 which project downwardly and carry horizontal pulverizing blades 22 and spacing sleeves 23 secured by a nut 24. Each housing is provided with an annular groove 26 to receive a U-bolt for detachably securing the housing to a bracket 28 on the plough frame, a shaped block 29 being interposed between the housing and the bracket. Bolted to one of the housings 17 is a housing 31 for a driving-shaft 35 which is provided with a universal joint for connection to a bearings 34. The pulverizer shafts 21 are mounted between fore-and-aft lines passing through the land'sides and the outer ends of the shares 12, and the pulverizers are located wholly behind the short mouldboards. They engage the bottom of the furrow slice and are rotated in such a direction as to tend to complete the turning over of the slice and push the plough forward. power shaft. The shaft 35 is mounted in roller bearings 34 and drives the shaft 21 through bevel gearing 37, 38, the driven shaft 21 driving the other vertical shaft 21 through chain gearing 41 running in oil in the frame member 14. The space between a tapered sleeve 39 and the housing 17 catches oil that flows over the flange 19, and any oil overflowing from this space flows through the bearings 34. The bevel wheel 37 runs in the oil and transmits it to the shaft 35 and bearings 34 when the oil level is below the
Patent GB-813902-A (GB)
Title: Improvements in or relating to thermionic valves and cathodes therefor
Inventor: BULL CABOT SEATON
IPC: H01J1/13
Filed: 1954-09-08
Abstract: 813,902. Thermionic valves. ELECTRIC & MUSICAL INDUSTRIES Ltd. Sept. 7, 1955 [Sept. 8, 1954], No. 25965/54. Class 39(1). A tubular indirectly-heated cathode serving more than one electrode system arranged along its length has different or differently orientated cross-sections in the parts corresponding to the different systems. In Fig. 1 the cathode of a triode-pentode has the triode part 2 of circular section and the pentode part 1 of barrel section, the overall perimeter being the same. Alternatively, the parts may be of the same section but differently orientated, e.g. elliptical with the major axes at right-angles. Three mica spacers are used to support the cathode, at top, bottom, and middle. The aperture in the middle mica is of such shape and size that the mica will pass freely over one cathode part, but will engage it where it changes section.
Patent GB-1468853-A (GB)
Title: Process for the continuous production of carbon black/plastics compositions
IPC: B29C48/395
Filed: 1974-06-12
Abstract: 1468853 Carbon black-filled thermoplastics DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT 12 June 1974 [29 June 1973] 26031/74 Heading C3P Carbon black is incorporated in a thermoplastics material by a process which comprises adding the carbon black to the thermoplastics material in a continuous screw extruder at at least two points lying one behind the other in the delivery direction. Plastics material and part of the carbon black may be introduced together at a first inlet, and the distance between inlets may be 2 to 6, preferably 3 to 5 times the diameter of the kneader screw. The process may be used to produce concentrates which may be diluted with further plastics material. Examples describe the preparation of compositions of carbon black with (1 to 4) polyethylene, (2) polypropylene and (3) polystyrene.