baber/WOPTO huggingface dataset:
Patent GB-1221741-A (GB)
Title: Process for the production of elastic shaped structures which have a compact surface from polyurethanes
Inventor: WIRTZ HANS
IPC: C08J9/34
Filed: 1969-01-24
Abstract: 1,221,741. Polyurethanes. FARBENFABRIKEN BAYER A.G. 24 Jan., 1969 [17 Feb., 1968], No. 4064/69. Headings C3C and C3R. Elastic or semi-elastic polyurethane shaped structures which have a compact i.e. substantially non-cellular surface, are prepared by foaming in a mould, in the absence of a surfactant, a foamable reaction mixture comprising a polyisocyanate, a low boiling organic blowing agent, and a mixture of at least two compounds which contain reactive hydrogen atoms and which differ in their reactivity towards isocyanates, at least one of which compounds is a polyalkylene glycol ether having a M.W. of 500 to 10,000, heat being supplied to the mould, either externally or from reaction heat. In an example, a polyalkylene glycol ether prepared by adding propylene oxide and ethylene oxide to trimethylolpropane, butane - 1,4 - diol, trichloromonofluoromethane and triethylene diamine are mixed together and reacted with diphenylmethane - 4,4<SP>1</SP> - diisocyanate which has undergone partial self-condensation with formation of carbodiimide groups to form a foam.
Patent GB-104748-A (GB)
Title: Improvements in Mounting-blocks for Printing Plates and the like.
Inventor: DEAN ARTHUR ALBERT
IPC: B41N6/00
Filed: 1916-03-21
Abstract: 104,748. Dean, A. A. March 21, 1916. Printing-surfaces.-Relates to mounting-blocks for printing-plates &c., of the kind in which a series of wooden blocks are secured together edge to edge in a metal frame. According to the invention, the wooden blocks c are grooved on the edges to receive wooden keying-strips d and to engage internal tongues b on the frame a, a', and are provided with holes to receive bolts c, some of which pass through the frame and are secured by nuts f.
Patent GB-925785-A (GB)
Title: Improvements in or relating to brackets
Inventor: STEWART JOHN ALEXANDER
IPC: E05D15/06
Filed: 1962-02-02
Abstract: 925,785. Sliding door brackets. E. HILL ALDAM & CO. Ltd. Feb. 2, 1962, No. 4176/62. Class 52 (5). A bracket for supporting track for sliding doors has two limbs 4 and 6 whose free ends are spaced apart to receive the roller assembly contained in a track, and whose upper extensions are welded together to form a flange 8 bent over at the top to form a lip 10, and having a slot 12. Mounted between the head of bolt 20 and flange 8 is a double cam comprising a restraining cam 30 contacting the surface 11, and a loadbearing cam 28 contacting the underside of lip 10. The cams are arranged so that the diameter through the above two points of contact is of constant length, and as the cam is rotated the spacing of bolt 20 and lip 10 is varied.
Patent GB-544866-A (GB)
Title: Means for screening sewage or other liquids carrying solid matter
IPC: B01D35/02
Filed: 1941-03-29
Abstract: 544,866. Treating sewage. JONES & ATTWOOD, Ltd., and FOLKES, H. L. March 29, 1941, No. 4256. [Class 111] Apparatus for screening a sewage or other liquid stream containing solid matter comprises the combination of a pair of ducts, screening means in one of the ducts, and means adapted to direct the upper and lower portions of the stream carrying the whole or substantially the whole of the solid matter into the duct containing the screening means and the relatively clear intermediate portion into the other duct. As shown, a main duct a is divided into smaller ducts a<SP>1</SP>, a<SP>2</SP> and a submerged duct d, formed by plates f, serves to convey the relatively clear portion of the stream to the duct a<SP>1</SP>, the inclined or curved wall e directing the remainder of the stream carrying the relatively light and heavy portions of the solid matter to the duct a<SP>1</SP> containing the screening means c. The latter may consist of a comminutor, a fixed grid or like means by which the solid matter is separated or temporarily arrested and reduced in size. A screen may also be arranged in the duct a<SP>1</SP>. Either or both of the plates f may be fitted with a flap g automatically adjusted by a lever connected to a float h in an anti-chamber i. The ducts a<SP>1</SP>, a<SP>2</SP> may communicate with a duct a<SP>3</SP> or be kept separate.
Patent GB-179995-A (GB)
Title: Improvements in or relating to self-propelled agricultural or farm tractor vehicles
IPC: A01B35/22
Filed: 1921-11-07
Abstract: 179,995. Mercer, D. Nov. 7, 1921. Tools, mounting yieldingly.- Apparatus mounted behind the rear wheels or endless tracks of an agricultural tractor to cultivate, scarify, or open out the the soil compressed by the wheels or endless tracks, comprises tines which automatically withdraw from the soil when the tractor is reversed. The tines f are pivoted on bifurcated arms d projecting from a shaft carried by brackets. c on the rear part a of the chassis. The tines are provided with removable end pieces g and are normally held in operative position by springs k and adjustable set-screws h carried by arms f<1> and bearing against blocks j. For travelling along roads, the tines are turned up against the arms d and are held there by the springs k.
Patent GB-621299-A (GB)
Title: Improvements relating to rotary operated snap acting devices
IPC: H01H21/44
Filed: 1947-02-14
Abstract: 621,299. Springs. FIRST INDUSTRIAL CORPORATION. Feb. 14, 1947, No. 4378. Convention date, Feb. 18, 1946. [Class 108 (iii)] [Also in Group XXXVII] A snap-action device for use in an electric switch comprises a trifurcated blade spring having a centre leg 46 pivoted in a groove 52 in a lug 47, and the ends of the tension legs 41 remote from the face (contact) end joined by a transverse piece 42 pivoted in a groove 54 on a member 56, itself pivoted in a groove 53 in lug 47. Rocking of the member 56 by a cam 32 moves the outer legs 41 over the groove 52, but not beyond the grooves 53 so that a retractive force is always available. The travel of the cam 32 is limited by stops 57, 58 on the base to permit a slight overtravel beyond the operating position.
Patent GB-215832-A (GB)
Title: Improvements in and relating to means for deaerating water and particularly feed water for steam boilers
IPC: B01D19/00
Filed: 1923-02-14
Abstract: 215,832. Johnson, J. E., and Hick, Hargreaves, & Co., Ltd. Feb. 14, 1923. Liquids and gases, separating.-In a plant for de-aerating feed-water of the kind comprising a heater d and a de-aeration vessel a, into which the heated water is sprayed and from which air and gases are exhausted, the water is supplied to the lower part of the de-aeration vessel and is directed upwardly in a fine spray. The water inlet pipe a<1> terminates in the deaeration vessel in a series of jets or nozzles a<2>. A steam-jet ejector b draws air and gases from the vessel through a trap b<1> draining into the vessel. The feed-water passes through pipe coils in the heater and is heated by steam from the ejector and from the engines. The passage of water into the deaeration vessel is controlled by a float valve a<5>. The heater drain pipe d<6> may discharge into a well f, which is so connected to the de-aeration vessel by a pipe f<1> that water may pass from the well into the vessel under the control of a float valve f<2>. The suction side of the discharge pump c is connected to the de-aeration vessel by a pipe c<1>.
Patent GB-342538-A (GB)
Title: Improvements in door and like hinges
IPC: E05D11/08
Filed: 1930-02-10
Abstract: 342,538. Door hinges. TIETZ, R., 17, D³ppelstrasse, Steglitz, Berlin. Feb. 10, 1930, No. 4422. [Class 65 (ii).] The leaves of a hinge are constructed with eyes split in various ways so as to grip the hinge pin resiliently and to offer frictional resistance to turning ; Figs. 5 and 6 show one formof a leaf so constructed. The hinge leaves may be laminated, and the eyes may be reinforced by split sleeves. In a modification, one of the leaves is constructed as above, and the hinge pin is fixed relative to the other leaf.
Patent GB-692930-A (GB)
Title: Gear change mechanism for preventing clashing of gears
IPC: F16H61/16
Filed: 1950-02-22
Abstract: 692,930. Controlling change-speed gearing. ASQUITH, Ltd., W., and JOHNSON. A. May 22, 1951 [Feb. 22, 1950], No. 4505/50. Class 80 (ii). To prevent attempted gear changing at high tooth speeds the initial movement of one or more manual gear change levers disconnects the power to the driving motor, and continued movement to effect a gear change is prevented until the input shaft has slowed to a predetermined speed. A gear lever G, Fig. 1, is connected to a shaft F which must be raised to engage a clutch M, N connecting the lever and shaft to the gear change mechanism O. A stop H is engageable with a slot in collar on the shaft F and determines two angular positions thereof. The initial upward movement of the shaft operates, through an adjustable collar J, a switch (not shown) which disconnects the driving motor, and angular movement of shaft F to change gear is prevented by a slidable pin D which obstructs a lever E on the shaft until the pin is retracted by a solenoid C<SP>1</SP> energised by a governor-operated switch on the input shaft when the latter has slowed down. In the construction shown in Fig. 5 a second gear lever R, additional to the lever G shown in Fig. 1, operates a gear change shaft Q and is interlocked with the same pin D of the solenoid C<SP>1</SP>, The end of the lever R co-operates with a notched gate plate T so that before the shaft Q can be rotated the lever must be rocked, thereby sliding a sleeve R' through a shaft R' and pin R<SP>4</SP>, to operate a motor switch S through a spring plunger R'. The pin D engages a hole in a lever keyed to a shaft P' which is geared to a shaft P<SP>5</SP> on which is mounted a crank arm linked to a crank on the shaft Q. By these means the shafts Q (Fig. 5) and F (Fig. 1) cannot be rotated to effect a gear change until the driving motor has been switched off and the input shaft has slowed to operate the solenoid C<SP>1</SP>.
Patent GB-902520-A (GB)
Title: A concrete mixer comprising a mixing device in the transport tub of a tub lift
IPC: B28C5/08
Filed: 1961-02-07
Abstract: 902,520. Concrete mixers. DE AUGUST, I. W. Feb. 7, 1961 [Jan. 3, 1961], No. 4568/61. Addition to 893,305. Class 86. The concrete mixer of the parent Specification is modified by the provision of means to prevent the resistance of the mix causing the winding ropes to slip on the pulleys of the mixer shaft. A drive shaft 1 carries two composite pulleys, each comprising a first pulley 4 and a second pulley 3, 3a, 3b having a section 3 of the same diameter as the pulley 4, a section 3b of larger diameter and an intermediate, conical section 3a; the sections 3, 3a have helical rope grooves. The mixer shaft 6 has a pulley 7 also provided with rope grooves 8, the ropes 9 being wrapped round the pulleys 7 and their ends fixed to pulleys 3, 4. In operation, commencing with the receiving drum in its lowest position as shown in Fig. 1, and with the shaft 1 rotating in the direction of the arrow, the ropes 9 are wound off the pulleys 4 and on to pulleys 3 at the same rate, causing rotation of the mixing shaft 6. The ropes then wind up the conical sections 3a and on to the larger diameters 3b, whereon they are wound at a greater rate than they are wound off the pulleys 4, thus raising the mixing drum. The arrangement enables a larger diameter pulley 7 than that of the parent Specification to be used. Optionally, the movement of the mixing drum may be further controlled by a rope 17 attached to the drum at 19 and to the yoke 16 of a pulley 15 carried in the bight of a rope 23, the ends of which are attached to the sections 13, 14 of a composite pulley 13, 13a, 13b, 14. Initially, the rope 23 is wound off the pulley 13 and on to pulley 14 at the same rate, restraining the rope 17 and hence the mixing drum. Later, that portion of the rope 23 coiled on the pulley 13b is wound off, increasing the length of the bight and paying out the rope 17.
Patent GB-1029531-A (GB)
Title: Logic circuit
IPC: H03K19/10
Filed: 1963-02-05
Abstract: 1,029,531. Semi-conductor logic circuits. SPERRY RAND CORPORATION. Feb. 5, 1963 [Feb. 13, 1962], No. 4600/63. Heading H3T. A logic circuit comprises a tunnel diode which may be switched to its high voltage state by pulses applied to it when a predetermined input condition is also applied to it, means for resetting the diode to its low voltage state, and a unidirectionally conducting device connected in the input path to the tunnel diode. Fig. 2 shows an AND circuit comprising a number of input diodes 200 connected via a backward diode 210 to a tunnel diode 212, the tunnel diode being biased to its low voltage region by a bias supply 216. Co-incident application of a positive clock pulse from SET source 208 and a " high level " input on the diodes 200 causes the tunnel diode to switch to its high voltage state. The tunnel diode may be reset to its low voltage state by application of a negative pulse from RESET source 220. The output from the circuit is fed to an OR circuit which comprises a similar circuit with the diodes and sources connected in reverse polarity.
Patent GB-608080-A (GB)
Title: Process for producing pure selenium
IPC: C01B19/02
Filed: 1946-02-14
Abstract: <PICT:0608080/III/1> An intermittent or continuous process for making elemental selenium consists of reducing selenium dioxide with at least a stoichiometric equivalent and preferably a slight excess of ammonia in the gaseous phase at a temperature of at least 603 DEG  F. and preferably 603-800 DEG  F. to produce selenium which is selectively condensed out in a condensing zone maintained at a temperature, above the melting point of selenium 422.5 DEG  F. and below 500 DEG  F., preferably 423 DEG -450 DEG  F.  The selenium dioxide and ammonia may be supplied to the reactor either as vapour or sprayed aqueous solutions.  In a specific example the vapour of selenium dioxide is supplied to reactor 11, by heating solid selenium dioxide in vessel 1 with burner 8, at a velocity controlled by screen 12, and is reduced by ammonia from pipe 13. The reactor, which is preferably of stainless steel or heat-resistant glass, may be heated, for example, by electric heating elements 17, if the heat of reaction is insufficient. Liquid selenium flows down the walls 19 of the condensing zone which is maintained at 423 DEG -450 DEG  F. by a plurality of heating means, for example electric heating elements 20, and is collected in receiver 23.  Specification 603,133 is referred to.
Patent GB-112867-A (GB)
Title: Improvements relating to Protective Gear for Dynamo Electric Generators.
Inventor: PEARCE HERBERT
IPC: H02H7/06
Filed: 1917-04-02
Abstract: 112,867. Pearce, H. April 2, 1917. Protective arrangements; automatic circuitbreakers. - Separately excited generators 1 are protected by a circuit-breaker 3 having its tripcoil 4 energized from the exciter 2 itself or from the excitation circuit and, in order to afford protection even if the exciter fails, and also when the exciter fails, the circuit-breaker is provided with an additional no-volt or low-voltage trip-coil 7 also energized from the exciter or from the excitation circuit. In the arrangement shown, when the overload or discriminating relay 6 operates, it closes the circuit of the trip-coil 4 which becomes energized from the exciter or from the excitation circuit, as shown, and if the excitation is sound, the circuit breaker is tripped; if not, the no-volt or low-voltage coil 7 trips the circuitbreaker whether the trip-coil 4 operates or not. A suitable no-volt tripping arrangement is shown in Fig. 2; the operating lever of the circuitbreaker 3 carries a pivoted iron core 13 sliding in a non-magnetic sleeve passing through the closed magnetic frame 15. The core 13 co-operates with a loose core 16 resting normally on the latch 10 and by its weight serving to free the operating handle and to permit the switch to fall to the open position. To set the circuit-breaker, the handle 8 is depressed, and, owing to the proximity of the loose core 16 to the core 13, the loose core is lifted with a comparatively small current in the no-volt coil 7 so that the higher current or maximum excitation does not over-heat the coil. When the core 16 is lifted, the latch engages with a pin 9 on the handle and holds the switch closed. In an alternative arrangement to that shown in Fig. 2, a resistance is introduced in series with the no-volt coil 7 and is short-circuited, momentarily, by a passing-contact switch while the circuit-breaker is being closed. In a modification, the no-volt device is provided with the coil 7 and with a second oppositely-wound coil in series with the trip-coil 4. When the relay 6 closes, the current in the trip-coil 4 passes through the second coil on the no-volt device and neutralizes the coil 7, so that either the trip-coil 4 or the no-volt device or both of these open the circuit-breaker. In this form, the trip-coil 4 may be dispensed with.
Patent GB-682311-A (GB)
Title: Improvements relating to the moulding of metal ingots
Inventor: NICOL JAMES
IPC: B22D7/10
Filed: 1948-02-18
Abstract: 682,311. Moulds. CLYDE ALLOY STEEL CO., Ltd. March 2, 1949 [Feb. 18, 1948], No. 4844/48. Class 83 (i). An ingot mould 1 whereof the inner upper face is divergent and of circular transverse section is combined with a thin-walled metal sleeve 4 of frusto-conical shape at least at its lower part which makes line contact with and continuously around said inner upper face. Asbestos cord may be provided at the junction and heat storing material 5, e.g. sand, between the upper face and the sleeve. The lower part of the inner face of the mould may be fluted or of octogonal or duodecagonal shape.
Patent GB-940211-A (GB)
Title: Improvements in or relating to agricultural implements
IPC: A01D78/00
Filed: 1960-02-11
Abstract: 940,211. Haymaking machines. PATENT CONCERN N.V. Feb. 11, 1960 [March 7, 1959], No. 4866/60. Heading A1F. An implement comprises a frame 1 supported on ground-wheels 18, 19 and carrying tools 3, 6, 7, 13, 14, the frame being connected to a bar 12 about a hinge 11 which is inclined to the vertical, the other end of the bar being maintained at a constant height above the ground so that by turning the bar about the hinge-axis the frame and the tools are caused to rise. In the form shown the tools are rakewheels carried on stub-shafts, two of which 8, 9, are extended forwardly to receive beams 10A 10B which are joined together and to the bar 12 by the hinge 11. The forward end of the bar 12 is adjustably bolted to a yoke 15 secured to a tractor draw-plate 16. The beams 10A, 10B and bar 12 are secured in fixed relationships by a stay 20 engaging selectively in holes 22 in a strip 24. The ground-wheels 18, 19 are vertically adjustable swivel-wheels, one of which 19, can be locked for direction control. In a modification (not shown) the beam 12 terminates in a further ground-wheel, the machine being drawn by other means.
Patent GB-286443-A (GB)
Title: Improvements in and relating to self-propelled vehicles
IPC: B60J7/04
Filed: 1927-02-21
Abstract: 286,443. Robertson, J. C. Feb. 21, 1927. Hoods.-In road vehicles comprising in combination a saloon body and a transversely rigid and longitudinally flexible sliding roof consisting of slats &c. provided with rollers moving in run ways, the sliding roof comprises articulated slats mounted on a weatherproof foundation and is provided with means for rendering weatherproof the exposed joints between the relatively movable parts. As shown, the roof comprises articulated slats 7 provided at intervals with brackets carrying rollers 9 travelling in runways 6 in the top members 3. The sliding roof is adapted to be retracted into the hollow back 4, 5 and is retained in its retracted and extended positions by spring flaps 10, 11. The part 6 of the back may be omitted or the whole of the back above the waist rail may be omitted and the roof arranged to slide to a position under the rear seats. Rubber tubing 13<a>, 14 may be provided to secure weatherproof conditions at the joints, the tubing being compressed when desired by rods 17, 18.
Patent GB-910202-A (GB)
Title: Improvements in or relating to ion-exchange membranes
Inventor: HEBBS LEWIS GOODIN SPIRE
IPC: D01F2/10
Filed: 1960-02-11
Abstract: A cellulose-containing membrane having ion-exchange properties comprises regenerated cellulose having incorporated therein an ion-exchanger, which may be an ion-exchange cellulose derivative, an ion-exchange resin, or both.  Specified cellulose derivative ion-exchangers include (a) cation-exchangers:-sulphethoxy cellulose, cellulose phosphate, carboxymethyl cellulose, cellulose citrate, cellulose hydrogen phthalate and oxidized cellulose; (b) anion-exchangers:-amino-ethyl cellulose, amino-propyl cellulose, diethylaminoethyl cellulose, ecteola cellulose (a derivative made from epichlorhydrin, triethanolamine and cellulose), di-isopropylamino-ethyl cellulose, and triethylamino-ethyl cellulose. Specified resinous ion-exchangers include (a) cation-exchangers:-polystyrene sulphonic acid, phenol sulphonic acid-formaldehyde resins and polyacrylic acid; (b) anion-exchangers:-styrene polymers and amine/aldehyde condensates containing quaternary ammonium or amine groups as active groups. The membrane may also include synthetic fibres, e.g. glass, polyethylene, polyacrylate, polyamide, polyester or polyvinyl derivative fibres. In a preferred method, a solution of viscose is mixed with an ion-exchanger, the mixture formed into a film and the film treated to regenerate cellulose from the viscose to form the membrane.  The ion-exchanger may be an ion-exchange cellulose derivative in sheet, fibre, thread, web, film, floc or powder form, an ion-exchange resin in particle or sheet form, or a mixture of ion-exchange cellulose derivative fibre or powder and ion-exchange resin particles, and synthetic fibres may be included in the ion-exchanger.  In an alternative method, the ion-exchanger is preformed into sheet form, the sheet impregnated with viscose solution, and the impregnated sheet treated to regenerate the cellulose from the viscose to form the membrane.  The ion-exchanger may be preformed into a sheet in paper form, and synthetic fibres, e.g. of glass, polyethylene, polyacrylate, polyamide, polyester, polyvinyl derivatives, polystyrene or polyacrylonitrile/polyvinyl copolymers, may be incorporated in the paper.  Regeneration is preferably effected by treatment with a salt solution, e.g. ammonium sulphate, followed by dilute acid, e.g. sulphuric acid.  Examples are given.