baber/WOPTO huggingface dataset:
Patent GB-1418285-A (GB)
Title: Pump assemblies
IPC: F02M59/12
Filed: 1974-05-02
Abstract: 1418285 Rotary positive-displacement pumps; centrifugal pumps GENERAL MOTORS CORP 2 May 1974 [15 June 1973] 19298/74 Headings F1C and F1F A rotary positive-displacement pump of the hinged-vane type comprises an annular rotor 120 surrounding a stationary cam 110 such that the vanes 136 are biased into engagement with cam surface 112 during start-up and acceleration to a predetermined speed, the vanes 136 being urged away from surface 112 by centrifugal force when said predetermined speed is reached so that the pump is inoperative at higher rotational speeds. The pump is used with a centrifugal pump 134 to supply fuel through the nozzle 16 of a gas turbine engine, the centrifugal pump 134 becoming operative alone at the idling speed of the turbine to supply fuel thereto, this idling speed being that at which the positive-displacement pump becomes inoperative. Fuel is drawn from a source 12 to the inlet 18 of a vapour liquid inducer and is discharged from the outlet of the inducer via line 22 to a valve 24 which, during start-up and acceleration to idling speed, connects line 22 via line 26 to an inlet 28 of the positive-displacement pump 30, the outlet of pump 30 being successively communicated with ports 130 in the impeller 132 of the centrifugal pump 134 which in turn transmits the fuel via metering valve 14 to nozzle 16. When idling speed is reached, the disengagement of the vanes 136 from surface 112 in the positive-displacement pump is accompanied by a positional charge of valve 24 so that fluid in line 22 by-passes pump 30 and is discharged via line 40 to the inlet 42 of the centrifugal pump 134 which thus acts alone to supply fuel at higher turbine speeds. The cam 110 of the positive-displacement pump 30 is integral with an axial projection 104 located in the tubular part 86 of a spool-like housing member 44, the drive-shaft 80 extending rotatably through projection 104 and cam 110 and having the impeller 132 of centrifugal pump 134 attached to its end, the annular rotor 120 of positive-displacement pump 30 being fixed to impeller 132. The vanes 136 are biased by springs 142 and also, during start-up and acceleration to idling speed, by high-pressure in an annular passage 183 transmitted thereto from line 22 via valve 24. This passage 183 is exhausted when the valve 24 changes position at the idling speed. The cam surface 112 has an inlet slot 114 communicating with the inlet 28 of the pump 30, whilst an outlet slot 129 communicates via outlet passage 131 with ports 130 in impeller 132. An end-plate 48 cooperates with one end of housing member 44 to define the volute chamber 152 of the centrifugal pump 134. The volute chamber 54 of the liquid vapour inducer is similarly formed by an end-plate 46, an impeller 72 being located in chamber 54. The vanes may be of the radially sliding type Fig. 4 (not shown).
Patent GB-440246-A (GB)
Title: Improvements in and relating to pocket fans
IPC: H02K7/14
Filed: 1935-07-06
Abstract: 440,246. Fastenings. HARTRIDGE, O. C., 118, Holborn, London. July 6, 1935, No. 19368. Convention date, July 28, 1934. [Class 44] [See also Group XXVI] The cover 2 of the casing of a pocket fan is held in position by blade spring catches 30, 31 which engage recesses in the casing. The catches are formed at the ends of contact strips 28, 29.
Patent GB-585996-A (GB)
Title: Improvements in or relating to the production of aceto acetic esters and their homologues
IPC: C07C69/72
Filed: 1943-11-19
Abstract: Alkyl esters of aceto-acetic acid and its homologues are prepared by passing a compound of the general formula R1CH(OH).CH2.COOR2, in which R1 and R2 represent saturated alkyl groups having not more than four carbon atoms, over a metal dehydrogenating catalyst at a temperature between 200 DEG  and 400 DEG  C. in the substantial absence of oxygen.  The preferred catalysts are metallic copper, silver and brass, generally in the form of gauze or filings, but, if desired, on a carrier such as magnesium oxide, magnesite, aluminia or partially oxidized metals.  Inert gases, for example, nitrogen or inert organic substances, or unsaturated organic substances such as methyl crotonate which serve as hydrogen acceptors for the hydrogen formed, may be present.  In examples: (1) methyl beta-hydroxy butyrate is passed through a heated tube at 330 DEG  C. containing a copper catalyst prepared by reducing copper oxide wire with hydrogen, yielding methyl aceto-acetate and some acetone; by reacting at 420 DEG  C. or in presence of oxygen only minor amounts of the aceto-acetate, but in the former case, large amounts of acetone and methyl crotonate are obtained; (3) the experiment of (1) above is repeated, using brass gauze as catalyst and results are given showing the effect of various temperatures on yields.  Specification 361,153 and U.S.A. Specifications 1,614,195 and 1,890,277 are referred to.
Patent GB-445661-A (GB)
Title: Improvements in paper containers
IPC: B65D3/26
Filed: 1935-07-08
Abstract: 445,661. Paper cartons. MARSHALL, C. L., 683, Broadway, Newark, New Jersey, U.S.A. July 8, 1935, No. 19432. Convention date, Oct. 5, 1934. [Class 66] The outer wall A of a double walled paper container of truncated conical shape, consisting of a rolled body blank provided with end closures, is provided with weakening lines 2, 3 defining a strip 9 the removal of which exposes the inner wallB, which is formed with a cut 5, preferably interrupted at suitable points by spaces or by weakening lines 10, disposed above the level of the upper weakening line ; the removal of the strip effects almost complete detachment of the top end closure, which is readily completely removed and is available as a cover for re-closure. The weakening lines 2, 3 which are preferably each composed of two rows of perforations arranged as at 10, are connected at the inner ends by a cut or a series of perforations 4, and a cut 13 is provided at the outer ends to afford a tab. In a modification the part 7 of the inner wall 13 above the cut 5 is omitted. In rolling the blank adhesive is omitted from the portion between the lines 2, 3 and from the part 7, the waxing &c. of the container affording a sufficient attachment. Specifications 390,700 and 413,873 are referred to.
Patent GB-596550-A (GB)
Title: Improvements in or relating to the utilisation of furnace ash
IPC: C04B28/04
Filed: 1945-07-30
Abstract: Building blocks and the like are prepared by mixing "fly ash" (i.e., the precipitated ash from pulverized fuel plants) containing sufficient water only to reduce dusting losses during mixing but insufficient to cause cohesion, with a small percentage of portland cement and with just sufficient water to cause it to cohere when pressed, and pressing the mixture into blocks.  Plastic clay, in amount between 0.5 and 1.5 per cent. may be included, preferably as a suspension in the water.  The water may amount to 20-30 per cent. of the mix, and the cement to 5-20 per cent., preferably about 15 per cent. of the "fly ash". According to an example, 190 lbs. of "fly ash" are mixed in a concrete mixer with 34lbs. of cement, and 30lbs. of water containing about 5 per cent. of suspended clay are sprayed in. The mix is compressed in a mould, removed and allowed to stand to dry at atmospheric temperature.  The blocks can be painted or colouring pigments can be incorporated in the mix, and waterproofing agents, such as aluminium stearate, soft soap followed by a wash with alum, or oleic acid, may be applied, or the blocks may be treated with sodium silicate.  Specifications 23541/12, [Class 70], and 107,868, [Class 22], are referred to.
Patent GB-478317-A (GB)
Title: Improvements in the manufacture and production of oxidation products from paraffin hydrocarbons of high molecular weight
Filed: 1936-07-14
Abstract: <PICT:0478317/IV/1> Paraffin hydrocarbons of high molecular weight are oxidized at a temperature not above 115 DEG  C. in the presence of manganese compounds in which manganese is contained in the anion and an alkali in the kation, such as potassium, sodium, and ammonium permanganates, manganates and manganites, ammonium permanganate, and potassium manganese cyanide, with or without other catalysts such as manganese acetate or alkaline substances such as soda. The oxidation may be effected by oxygen, air, or other gases containing oxygen, and accelerating substances such as nitrogen oxides may be present in small quantities.  Preferably the paraffin or part of it is heated with the catalyst, for instance, to 100--200 DEG  C., for some hours before starting the oxidation; this pretreatment may be shortened by adding some of the oxidized product of a previous batch.  Examples describe the oxidation of paraffin waxes at 110--115 DEG  C., 98--100 DEG  C., and 100--112 DEG  C. respectively, the mixture of paraffin and catalyst being preheated as described above, in one case together with one of the oxidized product of a previous batch.  In the apparatus shown, the paraffin is introduced at B into a reaction vessel A having a heating-jacket H.  Air enters through a porous plate C.  Part of the paraffin is circulated through a pipe E, to which is connected a branch F for returning any paraffin that may reach the trap G.  Specification 369,852 is referred to.
Patent GB-587932-A (GB)
Title: Improvements in or relating to compass systems
IPC: G01C19/36
Filed: 1943-11-23
Abstract: 587,932. Gyroscopic apparatus. LEAR AVIA, Inc. Nov. 23, 1943, No. 19587. Convention date, Aug. 12, 1942. [Class 97 (iii)] [Also in Group XXXVIII] A gyro-magnetic compass system comprises a pair of selsyn instruments driven respectively by the two compasses, the rotor of one instrument being connected to an A.C. source and that of the other to the input of an amplifier which controls means for causing the gyro to precess until the selsyns are in correspondence. As shown, the rotor 46 connected to the supply is driven by the gyro-compass and the misalignment signal is amplified and taken to a pair of thermionic tubes connected in push-pull and having an A.C. plate supply. The output of these tubes acts through a coil 25 on magnets 35 carried on the horizontal ring 18. In a modification, Fig. 3 (not shown), the misalignment current after amplification is fed to one coil of a dynamometer-relay which controls the coils for producing precession.
Patent GB-429415-A (GB)
Title: Improvements in and relating to grinding wheel
IPC: B24D5/16
Filed: 1934-07-03
Abstract: 429,415. Abrasive wheels. NORTON CO., New Bond Street, Worcester, Massachusetts, U.S.A. July 3, 1934, No. 19612. Convention date, July 3, 1933. [Class 60] To strengthen an abrasive wheel of bonded granular material against rupture it is formed of an integral central and an outer annular zone in which bonding materials of the same class are employed, but which so differ as to the proportions or kind, or both, of the granular abrasive and bonding material employed in them that the inner zone has a higher strength and ruptural deformation than the outer, wholst the moduli of elasticity of both zones are substantially equal, or have a ratio within 1 : 2'6. The characteristics of the outer zone are determined by the cutting properties required in it. A bond of the ceramic, or rubber, or resin class may be employed for both the inner and outer zones, but the two bonds may be of a different composition, though of the same class. Preferably the bonded materials in the two zones have substantially equal coefficients of expansion and drying and firing shrinkages, and the radial dimension of the inner zone is one-third that of the wheel. The increased strength of the inner zone may be obtained by employing a finer grain abrasive, down to 100 mesh size, than that employed in the outer zone, by employing the same sized abrasive in both zones but in greater proportion by volume in the inner zone, by employing a greater volume percentage of bond in the inner zone, by using a bond of greater strength than, though of the same class as, that in the outer zone, or by a combination of these methods. Particulars are given of the compositions and properties of the inner and outer zones of a 24-inch diameter wheel having 20 mesh alumina abrasive in the outer or cutting zone, and 36 mesh in the inner zone, a ceramic bond being employed, and also of a wheel in which abrasive of finer mesh is used.
Patent GB-874853-A (GB)
Title: Arrangement with an atomic station
IPC: F28D20/00
Filed: 1959-06-08
Abstract: 874,853. Nuclear power plant. ATOMENERGI A.B. June 8, 1959 [June 7, 1958], No. 19622/59. Class 39(4). In a nuclear reactor power station the reactor 2 produces steam for the turboalternator 14, 16. The reactor coolant, heavy water, passes through heat exchanger 8 and heats the pressurised water system 10 from which steam is generated at reducing valves 12, 13. The pressurised water accumulator 24 is connected between the high and low pressure sides of 10 and supplies energy during peak demands. The accumulator consists of a drum mounted in a rock chamber. The space between the drum and the chamber walls is filled with water which transmits the internal drum pressure directly to the rock, thus leaving the drum unstressed.
Patent GB-185093-A (GB)
Title: Knife-guard for meat-slicing machines and the like
IPC: B26D7/02
Filed: 1922-07-17
Abstract: 185,093. Aktiebolaget Stille-Werner. Aug. 23, 1921, [Convention date]. Guards.- In a disc-knife slicing-machine wherein the knife guard is connected at two points with a support and is made readily detachable to facilitate cleaning, one connection comprises an eccentric device which is turned in one direction to secure the guard and in the other to release it. A stationary support 3 is arranged to one side of the periphery of the knife 2, and is provided with a fixed pin 6 and a rotatable pin 7, which engages holes in the ends of the L-sectioned guard 4. The pin 7 is eccentrically secured on a member 8 which can be rotated in a recess in the support 3, by a lever 10 attached to the extension 9. The guard is thus tensioned between the pins 6, 7 and held in position or released by the appropriate movement of the lever 10. In modifications, the guard is provided with fixed and adjustable pins and the support 3 with openings for the pins, or the guard may have a pin which engages with an eccentric opening in the member 8.
Patent GB-749525-A (GB)
Title: Improvements in means for measuring velocity changes
Inventor: WITCOMBE LESLIE
IPC: G01P3/60
Filed: 1953-07-16
Abstract: 749,525. Measuring speed. T. M. M. (RESEARCH), Ltd. Aug. 18, 1954 [July 16, 1953], No. 19742/53. Class 40(1) A magnetic recording tape is driven by a moving member, whose linear or angular speed variations are to be measured, past a recording head fed with constant frequency electric pulses; subsequently the tape is driven at constant speed past a pick off, the output signals of which vary in frequency according to the speed of the member and are preferably translated to corresponding potential variations to operate a C.R.T. indicator. Recording, Fig. 5. A bar 20 carrying adjustable blocks 22 which may be rested on a part 24 of a machine, is then rocked via the handle 21 to press the magnetic tape 2 between a shaft 1 whose speed is to be investigated and a pinch roller 3, whereby the tape is driven over guides 26 past the recording head 4, fed from a standard frequency oscillator at a speed proportional to that of shaft 1 Reproduction, Figs. 3, 4. The pick-off signals obtained when the record tape is driven at constant speed are amplified, squared, and applied at A to a differentiating network B, the resultant positive pulses firing a thyratron V1 normally biased to cut off. Positive pulses thus derived from V1 at point C are fed directly to an amplitude sampling triode V3 and through a delay line 14 to fire momentarily a triode V2. A condenser Ce normally charged over a resistor R is rapidly discharged as V2 fires. The saw-tooth voltage developed across Ce thus rises from a constant minimum to a peak value substantially proportional to the time between the positive pulses at C (curve E). Slightly before the peak values are reached, the triode V3 is momentarily fired, by the direct positive pulses from point C, and conducts in series with V4 which functions as a cathode follower loaded by V3 so that the cathode voltage F is brought approximately to E, that of the grid of V4 substantially at the time of occurence of the peak values. A condenser CS follows these peaks (curve F, Fig. 4) and is connected across the Y plates of a C.R.T. 16. The X plates may be fed from a time base to display the speed of shaft 14 against time or the time base may be omitted and the Y trace photographed on a moving film
Patent GB-742643-A (GB)
Title: Improvements in the synthesis of nitrogenous bases
Inventor: BRADSHAW PETER LENTON
IPC: C07D213/09
Filed: 1951-08-23
Abstract: Pyridine and 3-picoline are produced by heating one of the following mixtures in the molecular ratios indicated in the presence of an alumina-silica catalyst, the molecular ratios of the aldehydes being maintained by introducing additional aldehyde to the reaction zone to compensate for any loss due to decomposition:- <FORM:0742643/IV(a)/1> It is desirable to use excess ammonia as a diluent.  Methylal may be used instead of formaldehyde and the acetaldehyde may conveniently be used in the form of paraldehyde.  The preferred catalyst is a natural alumina-silica such as fuller's earth having an acidic reaction.  In the examples: (a) methylal and acetaldehyde are heated in the presence of activated fuller's earth to give pyridine-type bases from which pyridine is separated; (b) formaldehyde and acetaldehyde are heated in the presence of activated fuller's earth to give pyridine-type bases from which pyridine is separated; (c) formaldehyde, acetaldehyde and ammonia are heated in the presence of activated fuller's earth to give pyridine-type bases from which 3-picoline is separated.
Patent GB-694166-A (GB)
Title: Improvements in frames for windows, doors and the like
IPC: E06B3/263
Filed: 1949-07-29
Abstract: 694,166. Windows, doors and the like. PERSSON, E. S. July 29, 1949 [Sept. 4, 1948], No. 20010/49. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 31, 1950]. Class 20 (iii) A frame for windows, doors and the like comprises two profiled, preferably metallic, sections adapted to support glass panes or fibre, plywood or like panels between a U-shaped cross-section portion of one profiled section and a portion of the other profiled section, the latter section having a flange covered with thermally insulated packing which extends into the U-shaped cross-section part. Two sections of U-shaped cross-sections 1, 2, 3 and 4, 5, 6, Fig 1, are separated by packing 8, e.g. textiles or asphalt or the like, and a glass pane 7 is held between shanks, 1 and a part 6 by an elastic holder 11. An extended part 12, Fig. 2, of section 1, 2, 3 may be adapted to hold a second glass pane 16. The section 4, 5, 6 may carry an abutment member 14 covered by an extension of packing 10 to engage the window frame 13, which is provided with a resilient metal strip 15. Resilient metal strips may be used instead of the holders 11, 17, Fig. 6 (not shown). One or both. of the panes may be held by putty, Figs. 5, 9 (not shown). The sections may be provided with guide members 42, 43 and packings 31, 44 bearing against a resilient plate 45 to form a sliding sash, Fig. 7. The sections may be moulded or formed from rolled sheet metal. One of the sections. may be made from synthetic resin. The Specification as open to inspection. under Sect. 91, describes also a metal frame formed by two interfitting sections, Fig. 5 (Cancelled), in which the pane is held solely by putty. Fig 9 (Cancelled) shows a window having two panes held by a metal fillet 51. This subject-matter does not appear in the Specification as accepted.
Patent GB-315863-A (GB)
Title: Improved generator for continuously working absorption refrigerating apparatus
IPC: F25B33/00
Filed: 1929-07-01
Abstract: 315,863. Siemens - Schuckertwerke Akt.-Ges. July 20, 1928, [Convention date]. Refrigerating, absorption machines for. - - In continuouslvacting machines in which vapour and entrained liquor pass from the generator 1 to the separation chamber 4, the strong liquor supply pipe 7 is connected to the upper part of the generator to prevent liquor being forced from the generator into the pipe 7 and consequent uncovering of the submerged electric heater 2, when the pressure in the generator rises unduly. A steam coil may be substituted for the electric heater. In a modification, the strong liquor supply pipe 15, Fig. 2, is formed with branches 16, 17. In another arrangement in which the supply pipe is also branched, the lower end of the pipe connecting the generator to the separation chamber is submerged.
Patent GB-1126185-A (GB)
Title: Improvements relating to electric motor speed control
Inventor: RUMING JOHN BAXTER
IPC: H02P7/295
Filed: 1966-05-06
Abstract: 1,126,185. Automatic control of speed. MULLARD Ltd. May 6, 1966, No. 20148/66. Heading G3R. [Also in Division H2] The speed of a series motor 2, 3 supplied from an A. C. source 4 is controlled by variation of the firing angle of a thyratron or thyristor 1 in response to back e.m.f. which is increased to improve stability by energizing the field via a separate diode 12 during the whole of each half cycle that the thyristor conducts, thus increasing the residual magnetism. The thyristor is triggered when the forward voltage on diode 9 from speed control potentiometer 6 sufficiently exceeds the back e. m.f.
Patent GB-1312207-A (GB)
Title: Slipping clutch
IPC: F16D7/02
Filed: 1971-04-19
Abstract: 1312207 Slipping shaft coupling P C PEDDINGHAUS and W PEDDINGHAUS [trading as PAUL FERD PEDDINGHAUS] 19 April 1971 [22 Jan 1970] 20244/71 Heading F2U A slipping clutch comprises at least one disc 3 slidable axially along a shaft 4 between pressure plates 7, 8 urged against the discs by cupsprings 10 whose thrust is adjusted by a nut 11  having an extension 12 encircling the springs to form a gap Z between the extension and one of the plates 8, the size of the gap Z being measurable (e.g. by thickness gauges) and indicating the spring thrust. The disc 3 may be connected to a sprocket 1 by an encircling chain 2. The sprocket 1 and extension 12 may have apertures 1a, 12a.