baber/WOPTO huggingface dataset:
Patent GB-386854-A (GB)
Title: Process for the decomposition of complex salts composed of double sulphates of potassium and calcium
IPC: C01D5/10
Filed: 1932-05-23
Abstract: In the production of potassium formate from a potassium sulphate solution and lime by treatment with carbon monoxide or producer gas under pressure at an elevated temperature, say at 175 DEG  C., the reaction mixture is further heated under pressure to 230 DEG  C. to decompose the complex sulphates of potassium and calcium which are formed thereby to permit the reaction to go to completion. Decomposition of the complex sulphates is facilitated by having sufficient lime present to render the reaction solution alkaline. Alternatively formation of the complex sulphates may be avoided by operating throughout at temperatures above 200 DEG  C. under pressure.  Polyhalite may be used as the source of potassium sulphate in which case sufficient lime is added to render the magnesium insoluble.ALSO:Complex salts consisting of potassium sulphate and calcium sulphate are decomposed by heating with water or aqueous solutions to decomposition temperature in closed pressure vessels, the potassium sulphate passing into solution.  In effecting double decomposition between potassium sulphate and calcium salts, the double sulphates formed may be first isolated and then decomposed; or decomposition may be effected by heating the whole of the reaction mixture; or the reaction be carried out under pressure at such temperatures that formation of the double salts is avoided. The decomposition may be accelerated by using solutions to which an alkaline reaction has been imparted, as by addition of quick lime. When complex salts containing magnesium, such as polyhalite, are treated, lime may be added to render the magnesium insoluble. Examples relate to the production of potassium formate from a mixture of potassium sulphate or polyhalite and lime by the action of carbon-monoxide or producer gas, the heat treatment being effected at 230-250 DEG  C.; and to the production of potassium nitrate from potassium sulphate, syngenite, or polyhalite and calcium nitrate, the heat treatment being effected at 250 DEG  C.
Patent GB-333287-A (GB)
Title: Improvements in mechanism for actuating the clutches used on printing machines
IPC: B41F13/00
Filed: 1929-05-09
Abstract: 333,287. Quick, C. G., and Bennett, T. R. May 9, 1929. Stopping and starting arrangements.- Clutch - actuating mechanism for printing - machines comprises a crank device which extends into a peripheral groove in the movable member of the clutch, utilizing the frictional drag between the crank device and the member due to the rotation thereof to maintain the movable member in one or both extreme positions. The movable clutch member 4, Fig. 1, engaging by means of pins 3 with the gear-wheel 2, is provided with a peripheral groove 7 into which extends a rectangular block 8 freely mounted on a stud or crank pin 9. The crank pin 9 is secured to a block 10 on a spindle 11 which is rotatably mounted in a fixed bearing bracket 12, and means such as a hand-lever 15 is adapted to rotate the spindle 11 to throw the movable clutch member 4 into or out of engagement with the gear-wheel 2. The lower end of the spindle 11 is cut away to form a flat face 13 adapted to abut against a limit stop 14 in each extreme position of the clutch member 4. The pin 14 is so arranged that the frictional drag of the groove 7 transmitted to the spindle 11, is such that the face 13, Figs. 3 and 4, exerts pressure on the pin in both extreme positions. The hand-lever 15 is provided on opposite faces with indicating tablets 16, one marked " in " and the other " out." The block 8 may be arranged to engage with the driven member of the clutch.
Patent GB-514951-A (GB)
Title: Improvements in or relating to the manufacture of grey cast iron
IPC: C21C1/00
Filed: 1938-05-16
Abstract: 514,951. Cast iron. DANIELS, F. C. T. May 16, 1938, No. 14575. Convention date, April 8. [Class 72] In the production of grey cast iron, a bath furnace, e.g., an open hearth or electric furnace, is charged with pig iron or. scrap iron, the bath. is brought to substantially above its teeming temperature so as to reduce the carbon content to that appropriate for a white cast iron, the carbon being in a state of extreme dispersion and when the charge is ready for teeming mixing therewith 2.5-25 per cent. of the weight of the total charge of a molten ferrous metal prepared in a cupola and having a high positive graphitising content and containing a proportion of carbon higher than that ultimately desired. In an example 80 per cent. of low carbon metal containing 2.55 per cent. of carbon is mixed with 20 per cent. of molten ferrous metal containing 4.30 of carbon, the final product containing 2.90 of carbon.
Patent GB-1042907-A (GB)
Title: A grease
IPC: C10M169/00
Filed: 1965-04-06
Abstract: A grease comprises a lubricating base oil gelled by a colloidally dispersed clay having on its acidic surfaces a resin formed by reaction of an aldehyde with both aniline and a bis-arylamine of the general formula <FORM:1042907/C4-C5/1> (wherein n is zero or 1 and R is a C1 to C4 alkylidene group), the equivalent ratio of aldehyde to aniline plus the bis-arylamine being 0.8:1 to 1.5:1 and the molar ratio of aniline to the bis-arylamine being 1:1 to 15:1.  The preferred base oil is a silicone, but mineral oils, fluocarbons, silicon esters and esters such as tricresyl phosphate, dioctyl phthalate and bis(2-ethylhexyl) sebacate or azelate may also be used. The aldehyde used to make the resin may be formaldehyde, acrolein, furfural, acetaldehyde or crotonaldehyde.  The bis-arylamine may be 4,41-methylenedianiline or benzidine.ALSO:A grease comprises a silicone oil, e.g. a methyl or methyl-phenyl silicone gelled by a colloidallydispersed clay having on its acidic surfaces a resin formed by reaction of an aldehyde with both aniline and a bis-arylamine of the general formula <FORM:1042907/C3/1> (wherein n is zero or 1 and R is a C1 to C4 alkylidene group), the equivalent ratio of aldehyde to aniline plus the bis-arylamine being 0.8:1 to 1.5:1 and the molar ratio of aniline to the bis-arylamine being 1:1 to 15:1.  The aldehyde used to make the resin may be formaldehyde, acrolein, furfural, acetaldehyde or crotonaldehyde.  The bis-arylamine may be 4,41-methylenedianiline or benzidine.
Patent GB-831379-A (GB)
Title: Optical glass
IPC: C03C3/155
Filed: 1958-05-07
Abstract: 831,379. Optical glass. ZEISS-STIFTUNG, C., [trading as JENAER GLASWERK SCHOTT & GEN.]. May 7, 1958 [May 23, 1957], No. 14650/58. Class 56. Optical glasses of refractive index from 1À77 to 1À805 or above is made from the following (weights per cent) :- LazOs 24-33 ThO 2  16À5-25À5 B 2 O 3  + SiO 2  19À5-30, SiO 2 < 6 divalent metal oxides 10-18, CaO+ # BaO+ #} < 7 SrO # CdO+ }#3-15, ZnO ZnO #0-10 Ta 2 O 5  0-13 WO 3  0-10 Ta 2 O 5  + WO 3  < 15 ZrO 2  may be added in amounts up to 6%. The WO 3  may be partly replaced by MoOs, and the Ta 2 O 5  partly by Nb 2 O 5.  Up to 1% of Li 2 O may also be added. The sum of La 2 O 3  and ThO 2  is preferably not lower than 49%. BaO, SrO and ThO 2  are preferably introduced as nitrates and CaO as the carbonate, the remainder being introduced into the mixture as oxides. Specification 807,520 is referred to.
Patent GB-855595-A (GB)
Title: Improvements relating to the electrical measurement of the thickness of a thread
Inventor: HEWITT ERIC JOHN ROBERT
IPC: B65H63/06
Filed: 1956-05-11
Abstract: 855,595. Electric tests. BRITISH NYLON SPINNERS Ltd. June 17, 1957 [May 11, 1956], No. 14660/56. Class 37 Apparatus for measuring the thickness of a thread comprises means for causing rapid releative to-and-fro movement, in a plane at right angles to the direction of linear movement of the thread, to take place between a running thread, and the electrodes of a condenser sufficient to cause the thread to be rapidly cyclically inserted between and withdrawn from the electrodes, a circuit incorporating the condenser for detecting capacity changes due to the cyclical insertion of the thread between the electrodes, an amplifier to amplify any resultant signals at the frequency of relative movement of the thread and electrodes, and means recording the amplifier output or a measure of the thickness of the thread. The apparatus for producing the relative movement between the thread and the electrodes and for detecting the resulting capacity changes is shown in Fig. 2 and comprises a plate 11 mounted on pillars 15 secured in a lower plate 15 surrounding a moving coil vibrator 17. The plate 11 carries a rectangular holder 19 for brass electrodes 21 mounted on ceramic plates 47 and connected to sockets 23 into which are plugged leads to the measuring circuit. Passing through holes 25 in the plate 11, and mounted at their lower ends so as to acquire the motion of the armature of the moving coil, vibrator 17 are upstanding rods 27. The rods 27 have guide portions 29 at their upper ends for moving a thread 1, passing through slots 31 in the walls of the holder 19, into and out of the top of the gap 33 between the electrodes 21, the gap is of 0À01 inches and the amount of movement of the thread 1 is about 0À02 inches upwards and downwards from a point just clear of the top of the gap. The vibrator 17 is driven at the mains frequency of 50 c.p.s. The moving coil vibrator can be replaced by a reciprocating traverse mechanism or by a rotating cam acting either directly on the thread or on flexibly mounted guides for the thread. The circuit including the condenser comprises a capacity bridge driven by a 1 megacycle osillatory circuit wherein a balancing capacitor is put into and out of the bridge circuit by a relay operating at the relative frequency of movement of the thread and electrodes. The capacitor is self-balancing by means of a servo-motor. An alternative circuit is referred to in which a variable frequency oscillator is followed by a frequency discriminator circuit. The input to the amplifier may be tuned by an inductance to nullify adverse effects due to the presence of capacities to earth in the in the leads to the condenser. Specification 843,623 is referred to.
Patent GB-384192-A (GB)
Title: Improvements in drawing mechanisms for textile rovings
IPC: D01H5/46
Filed: 1932-05-24
Abstract: 384,192. Weighting - apparatus for drawing-mechanism of textile machines. CASABLANCAS, F., 166, Mina, Sabadell, Barcelona, Spain. May 24, 1932, No. 14714. Convention date, Dec. 23, 1931. Addition to 333,717, [Class 120 (ii), Spinning, twisting, &c.]. [Class 120 (ii).] In the drawing-mechanism described in the parent Specification, wherein a pressure saddle rests upon two back rollers and may be combined with a supplementary saddle to rest upon a pair or pairs of front rollers, pressure is transmitted to the saddle by means of a spring 42, Fig. 1, or a lever 47, Fig. 4, connected to a cross shaft 44 which extends through the entire machine below the drawing-mechanism and is arranged at such distance from the roller beam that the surface of the beam is not encumbered, whereby cleaning is facilitated and the removal of the clearing brushes may be readily effected as they are not enclosed between the threads and pressure rods as in ordinary methods of weighting. In Fig. 1 a saddle 11 is shown connected to a saddle 10 by a rod 13 so that all three pairs of rollers are simultaneously weighted, and in Fig. 4 a saddle 11 is shown for weighting the back two pairs of rollers, the front rollers being independently weighted.
Patent GB-1111165-A (GB)
Title: Fibrous web having improved wet strength and method of its manufacture
IPC: D21H17/31
Filed: 1966-04-04
Abstract: A fibrous web of improved wet strength is made by treating a preformed web with a solution of pH above 9 of carboxymethyl cellulose and a water-soluble alkaline-curing resin, drying then acidifying the web.  The resulting web has a paper pH of 3-6. The resin can be the reaction product of epichlorohydrin and a polyamide which may contain secondary amine groups.  The polyamide may be derived from polyalkylene polyamine and saturated or unsaturated aliphatic or aromatic C3-10 poly carboxylic acids.  The gum: resin ratio may be greater than 1:1 e.g. 2 to 15:1.  The acid used can be HCl, H2SO4, acetic fumaric or lactic acid, or acid-producing salts, e.g. Al2(SO4)3 and NH4Cl.  The web may be partially or completely dry prior to treatment the resulting web can be washed, pressed and dried.
Patent GB-1372911-A (GB)
Title: Brassiere
IPC: A41C3/00
Filed: 1972-03-29
Abstract: 1372911 Brassiere H HAND 29 March 1972 [20 Aug 1971] 14781/72 Heading A3V A brassiere comprises a pair of breast-supporting straps 11, 12 joined end to end; a pair of breast-extending strips 26, 27 for encircling the upper portions of the breasts secured at their ends to opposite ends of the straps 11, 12; a pair of underarm side support bands 24, 25 joined to the remote ends of the straps 11, 12 and attached to each other by flexible back support members 41, 42, the adjoining edges of the straps 11, 12 and bands 24, 25 being concave so that their junction bows inwardly in use; and a pair of breast-shaping cups 43, 44 of flexible fabric secured at their lower edges to the breast-supporting straps and secured to a portion of the associated breastextending strips 26, 27. The cups 43, 44 carry at their upper edges fastener strips 53, 54 with alternative openings, and a pair of shoulder straps 55, 56 are attached to the bands 24, 25 at the rear and to buckles 35, 36 carried by the breast-extending strips 26, 27 at the front, said buckles having tongues for selective engagement in one of the openings in the associated fastener strip 53, 54 to allow adjustment of the position of the breast-shaping cups to accommodate periodical variations in the size of the breasts. A strip 22 of elasticised fabric having a smooth plush finish on its inner surface is attached to the lower edge of the breast-supporting straps 11, 12.
Patent GB-1309481-A (GB)
Title: Polyester compositions
IPC: C08K5/523
Filed: 1970-03-26
Abstract: 1309481 Laminates EASTMAN KODAK CO 26 March 1970 [28 March 1969] 14861/70 Heading B5N [Also in Divisions B3 and C3] Laminates of steel, aluminium, titanium, chromeplated steel and glass are bonded by a melt adhesive composition prepared by blending a bisphenol polyester with a triaryl phosphate (see Division C3). In an example 0À064-inch cold-rolled steel is bonded by placing a film of the polyester blend between the steel substrates which are then clamped together and immersed in a Wood's metal bath for 3 minutes at 320 C.
Patent GB-1210567-A (GB)
Title: Improvements in or relating to electroslag refining processes for steels having a high sulphur content
IPC: C22B9/18
Filed: 1968-03-28
Abstract: 1,210,567. Casting processes. BOHLER & CO. A.G. GEBR. 28 March, 1968 [28 March, 1967], No. 14862/68. Heading B3F. [Also in Division C7]  An electroslag refining process for steel intended to have a high sulphur content is characterized in that remelting is effected wit a slag which has a sulphur contact such that there is no net transfer of sulphur between the slag and the steel to be remelted and oxidation of sulphur in the slag is prevented by providing a reducing atmosphere over the slag.
Patent GB-841509-A (GB)
Title: Improvements in variable displacement rotary cylinder barrel longitudinally reciprocating piston pumps
IPC: F04B1/32
Filed: 1958-05-12
Abstract: 841,509. Swash plate pumps. NEW YORK AIR BRAKE CO. May 12, 1958 [June 20, 1957], No. 15122/58. Class 102(1). [Also in Group XXIX] In a swash plate pump in which the swashplate is urged towards the maximum stroke position by a spring- loaded plunger 38 and towards the no-stroke position by a motor piston 42 supplied with pressure liquid under the control of a valve 45, (see Group XXIX), the swash plate is pivoted about a point 36 spaced from the point 34 of intersection of the line joining the centres of the spherical heads 28 of the pistons 27 and the axis of the shaft so that the reaction of the pistons on the swash plate tends to move it towards the maximum stroke position. A further spring loaded plunger 37 acts on the swash plate and is so dimensioned that for a given speed of rotation it balances the inertia forces of the pistons on the swash plate. Specification 831,673 is referred to.
Patent GB-559905-A (GB)
Title: Improvements in card racks
IPC: B42F17/08
Filed: 1942-10-28
Abstract: 559,905. Racks for cards &c. CLARK, W., and BRITISH VACUUM CLEANER & ENGINEERING CO., Ltd. Oct. 28, 1942, No. 15126. [Class 52 (v)] A rack for holding index cards &c. comprises overlapping inclined triangular tongues c stamped and bent out of a metal sheet a having side flanges b. The lower most tongue i is solid and the tongues may be provided with depressions g to receive indentification tabs. The apices of the tongues may be stayed by tongues bent out of the side flanges or by rods passed through these flanges and welded to the triangular tongues.
Patent GB-649357-A (GB)
Title: Improvements in and relating to the regulation of dynamo electric machines
IPC: H02P9/36
Filed: 1948-06-04
Abstract: 649,357. Automatic voltage control systems. BRITISH THOMSON-HOUSTON CO., Ltd. June 4, 1948, No. 15186. Convention date, June 4, 1947. [Classes 35 and 38 (iv)] The output voltage of a alternator is automatically controlled by an amplidyne which supplies the field of the exciter of the alternator. As shown, the control windings 14, 16 of the amplidyne 6 determine the output of the latter which is applied to the field winding 21 of the D.C. generator 20. The latter supplies the field winding 3 of alternator 1. Specification 619,011 is referred to.
Patent GB-1342927-A (GB)
Title: Method of operating blast furnace and apparatus therefor
IPC: C21B7/24
Filed: 1971-05-17
Abstract: 1342927 Sound measurement SUMITOMO METAL INDUSTRIES Ltd 17 May 1971 [20 May 1970] 15222/71 Heading H4D Operating conditions in a blast furnace are judged by detecting the magnitude and varying distribution of solid-borne sound levels at selected points on the mantle of the furnace by means of sound detectors at those points to determine variation of the thickness of deposits on the wall and the occurrence and position of any movement of the burden. Sound detectors 1 of the Fig. 5 embodiment are positioned at one or more levels of the mantle, preferably at 90 degree intervals around the outside of the mantle at each level, the levels being about  to ¥ of the way up the furnace shaft. The detector outputs are amplified at 2, sampled in turn by switch 3, amplified at 4, and passed through a 5À6-11À2 kHz bandpass filter 5, then the resulting signals are rectified and logarithmically compressed in a servo system comprising A.C. amplifier 6, rectifier 7, D.C. amplifier 8, and potentiometers 9-1, 9-2, 9-3 &c. driven by servomotors M. The compressed signal from 9-2 is integrated at 20 and recorded at 13. Signals representing reference sound levels, obtained from unit 17, are applied to potentiometers 9-3 and the respective differences between the compressed measured sound levels and these reference levels are fed via integrators 10 to summing unit 11 and also to respective indicators 18. The summation signal is shifted through a store 12 to effectively lengthen the integration time, then compared with a reference level at 15. Alarm 16 is actuated if the reference level is exceeded. The sound level measurements may be used to predict instability of furnace operation, such as slip or "hanging" of the burden, and to provide a control signal for avoiding such instability.
Patent GB-186653-A (GB)
Title: Improvements in and relating to wheeled plows
IPC: A01B59/042
Filed: 1921-06-01
Abstract: 186,653. Jensen, C. A. June 1, 1921. Draught devices.-A draught appliance for connecting a wheeled gang plough to a tractor comprises a vertically flexible beam consisting of two parts 2, 2<a> connected together by a connecting-piece 44 to which the rear part is rigidly fixed and the forward part pivoted, the arrangement being such that when the ploughs are raised the connecting-piece 44 engages with the pivoted part 2<a> of the beam to prevent the ploughs from tipping backwards. The rear part 2 is attached to a slotted bracket 46 on the plough frame and passes through a looped bar 48 which is adjustable vertically by means of a clamp. The connecting-piece 44 comprises a casting consisting of a tapering hollow member 50 and two arms 52 bolted to the member 2. The forward part 2a of the beam is connected to the tractor and is pivoted in the narrow hollow member 50 near its smaller end, so as to have a limited vertical movement within it. The raising of the ploughs causes the bottom wall of the member 50 to be pressed against the part 2<a>. The draught connection may be made rigid by the insertion of a pin 54. Specification 183,782 is referred to.
Patent GB-170890-A (GB)
Title: Improvements in turret lathes and like machines
IPC: B23B7/12
Filed: 1920-06-05
Abstract: 170,890. Burnett, A. S., and Squire, T. June 5, 1920. Lathes.-A traversing feed for turret lathes &c. is operated by two parallel spindles automatically controlled to rotate singly or simultaneously, and so arranged that rotation of one spindle causes a rapid forward traverse and rotation of the other causes a rapid return traverse, while simultaneous rotation causes a slow cutting feed. The slide 1 is traversed by the two-part threaded spindle 2 engaging a rotatable nut 10 integral with a wheel driven from a wheel 12 splined to a plain spindle 14. The adjacent ends of the parts 4, 5 of the plain spindle are provided with clutch teeth, and a sliding clutch 8 is actuated by a lever 9 to engage the part 4 either with the driven part 5 or with a stationary member 6. The spindle 14 is similarly provided with a sliding clutch 20 actuated by a lever 21 to engage either a stationary member 18a or a drum member 16. The latter carries a sliding sleeve 22 operated by a lever 28 to impart a two-speed drum to the member 16. The spindle 5 carries a spring-pressed tubular member 29 engaging a fixed collar 30 and normally retaining a plunger 33 in its retracted position. The spindle 14 is driven at a slightly lower speed than the spindle 2 to provide a slow cutting feed, and at the end of the cutting stroke a projection 45 on the slide engages a stop 39 on a hexagonal stop-bar 40 and arrests the slide.. The collar 30 thus overruns and pushes back the member 29 releasing the plunger 33, which actuates, through lever mechanism, the clutch sleeve 22 and the lower of a series of control plates 41 having cam-surfaces adapted to operate slides 52, 53 controlling the levers 9, 21 respectively. This arrests the spindle 2 and returns the slide. At the end of the return travel the slide strikes a collar 55 to start a one-revolution shaft 54 and actuate a Geneva mechanism 61 to index the stop-bar. Further gearing 63 and connecting-rod 65 simultaneously slides a second control plate to disengage the clutch 20 and engage the clutch 8 to reverse the slide. Near the end of the forward movement a trip 48 straightens a toggle on a bar 46 secured to the stop-bar and actuates a lever 50 to slide the third control plate to reclutch the spindle 14 and cause a slow cutting feed. The invention is applicable to other types of machine tools.
Patent GB-958619-A (GB)
Title: Improvements in and relating to microscope focusing mechanism
Inventor: SIBERT ALAN CHARLES
IPC: G02B21/24
Filed: 1962-04-19
Abstract: 958, 619. Microscope focusing mechanisms. GILLETT & SIBERT OPTICS Ltd. Jan. 8, 1963 [April 19, 1962], No.15235/62. Heading G2J. In a microscope in which the coarse and fine focusing mechanism comprises two coaxial screws c, e, a screw threaded member, e.g. a half nut f, is continuously thrust radially against the outside screw e by means of a spring. A plate k pivoted about a ball r thrusts the half nut f against the screw e by means of the springs m,n. The screw e is cut away to provide limiting surfaces g for a pin h extending radially from the screw c, thus limiting the fine adjustment screw c. A slot t in the plate k is adapted to engage a fixed pin u on the stage pillar.