baber/WOPTO huggingface dataset:
Patent GB-832489-A (GB)
Title: A process for preparing high polymeric siloxanes
IPC: C08G77/24
Filed: 1957-03-12
Abstract: High polymeric fluoroalkyl siloxane gums are prepared by heating a cyclotrisiloxane of the formula (R11CH2CH2RSiO)3, in which R11 is a perfluoroalkyl radical of 1 to 10 carbon atoms and R is a mono-valent hydrocarbon radical or the radical R11CH2CH2, in the presence of an alkaline catalyst which is an alkali metal hydroxide, a quaternary ammonium hydroxide or a siloxane salt of one of these hydroxides, at a temperature and for a time sufficient to cause the desired polymerization without appreciable degradation of the polymer so formed to cyclosiloxanes.  The cyclic trisiloxanes are described in Specification 832,487.  The radicals R include alkyl, alkenyl, cycloaliphatic, aralkyl and aryl.  Specified catalysts are the alkali metal hydroxides, Me2SiOK, PhMeSiOLi, NaO(SiMe2O)3Na, Et3SiONa, Ph3 SiOK, beta-hydroxyethyltrimethyl ammonium hydroxide, benzyltrimethyl ammonium hydroxide, didodecyldimethyl ammonium hydroxide, Me3SiONMe4, PhMe2SiONMe3CH2CH2OH and the benzyltrimethyl ammonium salt of dimethyl silane diol.  A limited amount of solvent may be present, e.g. toluene, xylene, dibutyl and diphenyl ethers and the nitrogen-containing solvents disclosed in Specification 722,482.  In the example, the cyclic 3,3,3-trifluoropropyl methyl trisiloxane is heated with the salt KO(Me2SiO)2K for 4 to 5 minutes at 76 DEG  C., to form dry gum.  Heating to 150 DEG  C. for 3 minutes produced high polymers which degraded to low cycles.  The gums may be used to prepare rubbers as described in Specification 832,488.
Patent GB-961950-A (GB)
Title: Fail-safe system
Inventor: ROWELL WILLIAM GRANT
IPC: F23N5/02
Filed: 1960-10-07
Abstract: 961, 950. Operating single indicator receivers. SCULLY SIGNAL CO. Oct. 7, 1960, No. 8137/63. Divided out of 961,949. Drawings to Specification. Heading G4F. The description is the same as that of Specificiation 961,949, but the claims differ. Specifications 793, 511, 793, 512, 807, 033, 823, 880, 823, 881 and 823,882 also are referred to:
Patent GB-328384-A (GB)
Title: Improvements relating to detonating signals for railways
IPC: B61L5/22
Filed: 1929-03-13
Abstract: 328,384. Marzolf, K., Schneider, E., and Benke, E. March 13, 1929. Detonator apparatus; detonating signals.-In an electrically fired detonator signal apparatus, a set of detonators is fired simultaneously and all the detonators of the set or all but one of these have a different time lag device so that a series of explosions occurs at different times at points along the track so chosen that a moving train is near each explosion as it occurs. Detonators of each kind are stored in separate boxes 24, 24<1>, 24<11> which are placed on the track. Each box has a number of compartments into each of which an appropriate detonator fits between spring contacts 14. Each detonator comprises a case 1 containing explosive 4 and is closed by a cup 5 which is pushed up against a beading 3. The cup 5 carries a timed electric fuze 6 connected between the cup 5 and an insulated cover 9. Detonators vary in length according to the time delay fuze, and this prevents the insertion of a wrong detonator betwen any two springs 14. The detonators in the sets of boxes are connected in series in separate circuits passing to a selector switch 34 by which the successive series are brought into circuit. The circuit includes two resistances 31, 31<1>, which may be in parallel or in series with one another, and an indicator 35, through which a supervisory current flows to show that the circuit is completed through a series of detonators. The resistance 31 is arranged in series with the detonators so as to be shunted by a train-actuated switch 23 to increase the current to a magnitude sufficient to fire the detonators. The resistance 31<1> which is controlled by the semaphore signal is in series wtih the detonators when the signal is at " clear." Thus a train passing a " clear " signal does not fire detonators. The current through the indicator or ammeter 35 remains constant if either resistance 31, 31' is .in series with the detonators. When the circuit is opened either by firing the detonators or due to a fault, the ammeter puts the alarm 44 in action. A dead point on the switch 34 enables the apparatus to be put out of use. In one modified arrangement each series of detonators has associated with it a separate indicator and is in a normally closed indicating circuit. The selector switch in this arrangement serves to substitute the track and signal resistances for a loading resistance in the circuit of the series of detonators to be made ready for use. The detonator boxes 24, 24<1>, 24<11> can only be opened by a key from a switch in the firing circuit which must be opened to permit withdrawal of the key; the key can only be withdrawn from a detonator box when closed and locked.
Patent GB-963327-A (GB)
Title: Method and apparatus for the removal of adherent deposits
IPC: F28G9/00
Filed: 1962-03-02
Abstract: A method for removing adherent deposits, e.g. scale, from the internal surfaces of a closed <PICT:0963327/C6-C7/1> container, e.g. tubes and steam space of a steam boiler, comprises the steps of supplying a foamed liquid cleansing agent, e.g. water containing an inhibited inorganic acid and a synthetic detergent, to the interior of said container and varying the pressure within said container. The apparatus described comprises a foam generator 1 to which compressed air is supplied by compressor 6, the foam being conducted by pipe 25 into boiler 2, valve means 18, 19, 20 and 21 being provided to cause the pulsating pressure variation in boiler 2. Specification 961,461 is referred to.
Patent GB-125375-A (GB)
Title: Improvements in or relating to Magnetos.
IPC: H02K21/32
Filed: 1919-04-01
Abstract: 125,375. Arquembourg, Joret, et Cie, Soc. H. April 3, 1918, [Convention date]. Magneto-electric machines.-An ignition magneto for multi-cylinder engines comprises a substantially I-shaped armature rotating about the axis of its core and two field polar masses b, c, each of which is formed with two polar surfaces b<1>, b<2>, c<1>, c<2> diagonally positioned. The armature, which is made up of thin iron plates a, Fig. 16, riveted together and insulated from each other in the usual way, is enclosed in a non-magnetic metal casing having slots to take the edges of the armature wings and provided with journals at both ends. The magnetic flux traversing the armature core changes its direction four times in each revolution. The medial lines of the pole faces are situated in planes passing through the armature axis, the angle between the planes being 90 degrees or less according as the intervals between the sparks are to be equal or different. The armature may be extended at each end by projections a<5>, Fig. 17, the condenser e being placed between the projections a<5> at one end.
Patent GB-864372-A (GB)
Title: Improvements in frost-damage protection devices for orchards and the like
IPC: A01G13/06
Filed: 1957-03-13
Abstract: 864,372. Influencing meteorological conditions; powder distributers. GARDENER, J. G. June 12, 1958 [March 13, 1957], No. 8252/57. Classes 6(1) and 6(2). [Also in Group XXVIII] Apparatus for the protection of orchards, sports grounds, and racing tracks from frost comprises an air heater 4, a fan drawing air over the heater and positioned in a casing 1, the outlet of which connects with flexible ducts 7 from which flexible branch ducts 9 distribute air through holes 10. The ducts, which are made of synthetic resin extend along the ground and are held both along their length and at their ends by pegs extending diametrically across them. Wooden blocks slidably mounted on the pegs surmount and steady the pipes when inflated and press them flat against the ground when deflated. A layer of paper or transparent plastics material may be laid over the pipes to maintain a blanket of warm air in contact with the ground. The ducts 7 may have a double skin to prevent heat losses. Insecticide powder may be introduced into the ducts to be blown on to trees or ground.
Patent GB-895398-A (GB)
Title: Improvements in and relating to plaster compositions
Inventor: TALLENTIRE ARTHUR GLOVER
IPC: C04B28/14
Filed: 1960-03-09
Abstract: Plaster compositions comprising in admixture, calcium sulphate plaster, e.g. retarded calcium sulphate hemi-hydrate or accelerated anhydrous calcium sulphate, and exfoliated vermiculite in the proportions of from 12: 1 to 1: 1, by weight and including 0,01 to 2% by weight of finely divided methyl cellulose, based on the total weight of calcium sulphate plaster and vermiculite, are prepared by intimately mixing calcium sulphate plaster and exfoliated vermiculite and then uniformly mixing in the methyl cellulose, which is preferably of a fineness less than 150 m .  From 5 to 25% by weight of dry hydrated lime, based on the dry weight of the calcium sulphate plaster, may be mixed in before the methyl cellulose is added or may be mixed separately with the cellulose and this mixture incorporated. The exfoliated vermiculite is preferably of a size in the range 150 to 3000 m , more suitably within 300 to 2400 m , and may be pretreated with a waterproofing agent, e.g. liquid methyltrichlorsilane, 0,1 to 1 c.c. of liquid being added to every 100 grams of vermiculite.  Specification 554,952 is referred to.
Patent GB-101846-A (GB)
Title: Improvements in and relating to Railway Rail Joints.
Inventor: HARRIS GEORGE
IPC: E01B11/26
Filed: 1916-06-12
Abstract: 101,846. Harris, G. June 12, 1916. Rail joints, scarf and like.-Scarf joints for railway rails are formed with one rail end provided with stepped dovetails 14 which loosely seat in stepped dovetail recesses 22 in the other rail end. The thickened web portions have longitudinal grooves 17, 24 just above the bottom flanges, in which the upset edges of a sole-plate can engage.
Patent GB-1063152-A (GB)
Title: Catalytic process for the manufacture of phthalic anyhdride
Inventor: THOMAS PETER JAMES
IPC: C07C51/265
Filed: 1965-02-26
Abstract: Phthalic anhydride is obtained by interacting o-xylene with oxygen in the vapour phase at an elevated temperature in the presence of a catalyst comprising an oxide of Te in admixture or combination with an oxide of V.  The source of o-xylene may also contain one or more other alkylbenzenes.  A gaseous diluent, e g N2, may be present in the reaction mixture.  The preferred reaction temperature is in the range 250 DEG  to 550 DEG  C.  Examples are given for the production of phthalic anhydride showing the effect of the catalyst on the yield.  Maleic anhydride is also obtained as by-product in some of the Examples.ALSO:An oxidation catalyst comprises an oxide of Te in admixture or combination with an oxide of V.  It may be prepared either by mixing aqueous solutions or suspensions of oxides, acids or salts of Te and V, and calcining the residue obtained by evaporation of the aqueous solution; or by thoroughly mixing the component oxides, acids or salts in the dry state before calcination. Tellurium is preferably introduced as TeO2 or as a compound giving rise to TeO2 during the preparation of the catalyst. The catalyst may be used in finely divided form or as granules or pellets.  The catalyst may be deposited on a support material.
Patent GB-754469-A (GB)
Title: Improved combined electromagnetic voltage regulator and cut-out for mechanically propelled vehicles
IPC: H02J7/22
Filed: 1954-03-23
Abstract: 754,469. Electromagnetic switches; electromagnetic interrupters. BOSCH GES., R. March 23, 1954 [March 25, 1953], No. 8397/54. Class 38(5) A combined voltage regulator and cutout for battery charging on motor vehicles comprises a U-shaped magnet frame 14 carrying in a brass ring 15 a core 10 supporting a voltage coil 16 and a current coil 17. Brackets 19, 20 on the frame limb 18 respectively support, through leaf springs 23, 24, the cut-out armature 21 and voltage regulator armature 22, bracket 19 being supported on a magnetic strip 51 having an end 53 serving as a back stop for the armature 21, and bracket 20 being insulated from the limb 18. The spring 23 carries a contact 27 co-operating with a fixed contact 38, whilst a double contact 25, 26 on spring 24 co-operates with fixed contacts 28, 29. A magnetic disc 48 on the core 10 forms a secondary magnetic circuit shunting the armature 22. The frame 14 is insulatedly carried by a metal base plate 32 which supports the fixed contacts, the plate 32 having a shock absorber rubber ring 57. The flux from the coil 16 divides into two parallel paths, one from the core 10 through the ring 15 to the limb 18, the other through the armature 21 and the strip 51 to the limb 18, and the ring 15 is proportioned to divide the flux such that the armature 22 pulls in for a voltage on the coil 16 which is lower than that required to pull in the armature 21.
Patent GB-572626-A (GB)
Title: A new or improved variable speed gear
IPC: F16H13/14
Filed: 1944-05-05
Abstract: 572,626. Variable-speed gearing. TIPPEN, F. J: May 5, 1944, No..8502. [Class 80 (ii)] [Also in Group XXXIV] Relates to friction gearing in which discs 10, 11, on driving and driven shafts 12, 13, which are parallel and out of line, co-operate with a roller 14 movable along its axis to vary the speed ratio, wedge shape or helical means being provided between the shaft 12 and its driving pulley 68 to produce endwise pressure on the disc 10 proportional to the torque applied. Additional rollers 16, 17, axially immovable, engage the discs 10, 11 to balance the axial pressures. The roller 10 may be mounted on the shaft 12 by a resilient disc 50, Fig. 2, and the shaft 12 may have a reduced flexible portion 56. As shown in Fig. 3, the driving pulley 68 is clamped on a sleeve 67 between discs 69, 70, by springs 71. A disc 78 fixed to the sleeve 67 has recesses facing recesses in a member 76 fixed to the shaft 12, and balls 79 are located in the recesses. A spring 80 provides an initial thrust on the disc 10. The bearings 59, 60, for the extension 55 of the sleeve 67 have a spring 61 therebetween. Instead of the balls 79 and recesses, a sleeve 94 may be screw-threaded on the end of the shaft 12 and engage screw threads in a member 95, Fig. 6. Springs 99, 102, act on the shaft 12 and sleeve 94. The shaft 13 may be fitted similarly. A pinion 113 frictionally gripping the coned end of the shaft 13 under the action of a spring 114, meshes a gear 122 on a final driven shaft 120. The roller 14 may be formed as shown in Fig. 9. A sleeve 33 mounted on the shaft 15 by bearings 40, has a cylindrical surface 39 out of line with the shaft 15. A tyre 38 with a spherical surface 42 for engagement with the discs 10, 11 is carried by the surface 39 and is arranged to creep when in operation. Thus, wear on the surface 42 is maintained uniform. The discs 10, 11 are lubricated by a pad 45 standing in the base of the casing 23 and having upstanding arms 46 bearing on the discs.
Patent GB-622578-A (GB)
Title: Improvements relating to sliver and ribbon lap machines
IPC: D01G27/00
Filed: 1947-03-28
Abstract: 622,578. Lap-forming apparatus. KNOWLES, Ltd., and GODDARD, M. March 28, 1947, No. 8511. [Class 120. (i)] In a sliver or ribbon lap machine, a ratchet wheel a on the brake and rack pinion shaft b is turned to raise the full lap bobbin m, so that the latter can be removed, by a pawl f pivoted on an operating handle d, the pawl being automatically disengaged from the ratchet wheel when the handle is in the out-of-service position shown, to which it is moved by a spring h, the descent of the racks k being then controlled only by the brake. As shown, when handle d is in its out-of-service position an arm g engagesa stop i to remove pawl f from the ratchet wheel a. Shaft b is provided with a pedaloperated brake, which is released while. handle d is moved forward to raise the racks, but is applied when the bobbin is in the raised position.
Patent GB-1108439-A (GB)
Title: Book assembly for educational purposes
IPC: G09B3/08
Filed: 1966-02-28
Abstract: 1,108,439. Educational appliances. S. SMITH. 28 Feb., 1966 [18 March, 1965], No. 8603/66. Heading G5G. [Also in Division B6] In a book assembly (see Division B6) for facilitating the study of a particular subject, a main book 12 descriptive of the subject, and an auxiliary book 15 containing a dictionary, index, and sets of examination questions and answers, are bound together within a cover 72, and the book 15 is readily detachable from the assembly. Each page 11 of the main book is divided into columns 16, 18 with certain areas 20, 22 in different colours containing key information. The auxiliary book 15 may have one section (25) containing a glossary, dictionary, and outline of the subject, and another section (30) containing two or more sets of examination sheets. The latter sheets (Figs. 3-6), in the section (30) contain wider sheets (31, 33, 35) alternating with narrower sheets (32, 34), and the arrangement is such that answers (38<SP>1</SP>) to questions (36<SP>1</SP>) can be written on the wider sheets. Model answers are arranged on some of the sheets. In a modification, there are two auxiliary books (15a, 15b, Fig. 7) which are readily detachable from the assembly.
Patent GB-326998-A (GB)
Title: Improvements relating to water-gas plants
IPC: C10J3/00
Filed: 1929-03-16
Abstract: 326,998. Schlatter, T. March 16, 1929. Water gas plant.-A steam superheater d for watergas plants is built into the walls of the secondary combustion chamber b in which the intermittent absorption of heat by the brickwork from the combustion of the blow gases takes' place. The chamber b is disposed between the water gas , producer a and the waste-heat boiler c.
Patent GB-251084-A (GB)
Title: Improvements relating to grinding mills for mortar, gravel, sand, cattle foods and the like
IPC: B02C15/00
Filed: 1925-04-01
Abstract: 251,084. Webster, N., and Webster, R. April 1, 1925. Edge-runners and pans and like mills.-In a self-contained portable power-driven grinding-mill for mortar, gravel, sand, cattle foods, &c., the pan of the mill is driven by means of an internal gear and pinion combined with bevel-gears, and a winch or capstan may be fitted to the mill and be driven from the same source of power that rotates the pan of the mill. An internal gear wheel m bolted to or integral with the underside of the pan e meshes with a pinion n on a vertical shaft o driven through bevel-gearing q, r from an horizontal shaft which is supported in ball bearings t and driven through belt, toothed, or chain gearing from a power unit d<1> mounted on supports d attached to the frame of the mill. The grinding-rollers f rotate on axles g to which pressure is applied by a spring g<1> adjustable by means of a nut h. The pan is mounted on a vertical shaft i running in top and bottom bearings j, k. A winch or capstan w may be mounted over the top stretcher a<1> of the mill frame with supporting-brackets u, u<1> and be driven through bevel-gearing v from the shaft i. Or the capstan may be mounted vertically on an extension of the shaft i. The mill is supported on road-wheels c, and the propelling- mechanism comprises bevel-gears y, shaft y<1>, and bevel-gears z.
Patent GB-609677-A (GB)
Title: Improved method of, and means for making moulds for producing ferrous and non-ferrous castings provided with holes
IPC: B22C21/14
Filed: 1946-03-20
Abstract: 609,677. Foundry patterns. TEES SIDE BRIDGE & ENGINEERING WORKS, Ltd., and HOBSON, J. H. D. March 20, 1946, No. 8657. [Class 83 (i)] A method of making moulds for the production of ferrous and non-ferrous castings provided with holes, consists in employing a supplementary pattern to mould, in situ and integral with the mould for the casting, the core or cores necessary to form the required hole or holes in the casting. The invention is described as applied to the production of pairs of rectangular base plates for flat-bottomed rails, each plate having three square-shaped holes at each end. Into the main pattern are fitted in the appropriate positions supplementary patterns comprising pairs of inserts b, c, which may be of brass or light alloy as required, and which provide accurately-spaced square-section holes f for the required cores. After ramming the main pattern is removed, leaving the supplementary pattern to be removed in any convenient direction, for which purpose it is split as shown in Fig. 2, leaving the required cores k integral with the moulds a<SP>1</SP>.
Patent GB-735736-A (GB)
Title: Improvements in and relating to silicone rubbers
IPC: C08K5/14
Filed: 1953-03-30
Abstract: A composition comprises (1) an organo polysiloxane convertible to the solid elastic state, and (2) from 0.1 to 6 per cent by weight of the siloxane of cumene (isopropylbenzene) hydroperoxide or p-tertiarybutylisopropyl hydroperoxide.  The siloxanes used may be highly viscous masses or gummy, elastic solids, and are disclosed in Specifications 594,481, 618,453 and 640,067.  The preferred siloxanes have the formula R2SiO, in which each R is a methyl or aryl radical, at least 90 per cent of the R radicals being methyl.  The compositions may contain cure accelerators such as benzoyl peroxide, tertiary butyl perbenzoate and zirconyl nitrate, and fillers such as silica, silica aerogel, titania, calcium silicate, ferric oxide, chromic oxide, cadmium sulphide, asbestos, glass fibres, calcium carbonate, carbon black, diatomaceous earth, lithopone and talc.  The ingredients may be compounded on rubber rolls, shaped and heated under pressure, e.g. at 130 DEG  C. for 15 minutes at 500 p.s.i.  The products may be further heat treated, e.g. at 250 DEG  C. for 24 hours.  Examples are given.  The products are useful as gaskets, tubing, electrical insulation and shock absorbers.  Specification 630,883 also is referred to.
Patent GB-1474516-A (GB)
IPC: C22C9/02
Filed: 1976-03-04
Abstract: 1474516 Cu alloy wire BERKENHOFF & CO 4 March 1976 [7 March 1975] 08724/76 Heading C7A A copper-tin alloy of composition:- The alloy may be used in papermaking as a wire cloth.
Patent GB-1206720-A (GB)
Title: Improvements in servo control systems
Inventor: PLUMMER DEXTER ROBERT
IPC: G05D3/14
Filed: 1968-02-22
Abstract: 1,206,720. Automatic speed control. RANK ORGANISATION Ltd. Feb. 5, 1969 [Feb.22, 1968], No. 8733/68. Heading G3R.  In a servo control system two signals responsive to the response of an actuator are derived, one directly from the actuator and one from a transducer coupled to the actuator, the two signals being combined in a frequency responsive filtering means to produce a feedback signal independent of the effects of mechanical resonance in the system. In an automatic speed control system an electric motor 2 drives a tachometer generator 6; such a coupling has mechanical resonances which effect the output of the tachogenerator. Accordingly, the output of the generator 6 is fed back to the input of a control amplifier 4 through a filer 20 which attenuates the signal at a frequency or frequencies at which mechanical resonance occurs. A second signal representative of the speed of the motor is derived from the back e. m.f. of the motor by a bridge circuit R12-R16. This second signal is fed to the amplifier 4 by a second filter 22 which accepts only those frequencies which filter 20 rejects. The combination of the two signals, which is a signal representative of speed and independant of the mechanical resonances, is compared in the amplifier 4 with a desired speed signal from a generator 32, the difference signal controlling the energization of the motor 2. The invention is also applicable to hydraulic servosystems and to positional servosystems with rate feedback.