baber/WOPTO huggingface dataset:
Patent GB-352739-A (GB)
Title: Fertiliser manufacture
IPC: C05B1/02
Filed: 1930-07-14
Abstract: Calcium superphosphate fertilizers containing calcium nitrate are made by treating mineral phosphates with sulphuric acid and nitric acid successively.  Preferably enough sulphuric acid is first added to decompose any salts of volatile acids such as carbonates and fluorides which are present in the phosphate rock. For this purpose about one-half the total quantity of sulphuric acid equivalent to the amount of rock treated is suitable.  The nitric acid is added when the mixture has cooled, thus avoiding loss by volatilization and evolution of nitrogen oxides.  The final product may be modified by the addition of nitrogenous or other compounds, for example, ammonia or ammonium salts.  An example is given.ALSO:Calcium superphosphate fertilizers containing calcium nitrate are made by treating mineral phosphates with sulphuric acid and nitric acid successively. Preferably enough sulphuric acid is first added to decompose any salts of volatile acids such as carbonates and fluorides which are present in the phosphate rock. For this purpose about one half the total quantity of sulphuric acid equivalent to the amount of rock treated is suitable.  The nitric acid is added when the mixture has cooled, thus avoiding loss by volatilization and evolution of nitrogen oxides.  The final product may be modified by the addition of nitrogenous or other compounds, for example, ammonia or ammonium salts.  An example is given.
Patent GB-1174633-A (GB)
Title: Electromagnetic Clutch and Brake
IPC: B41L39/00
Filed: 1967-05-08
Abstract: 1,174,633. Clutch and brake combinations; electromagnetic disc brakes. BENDIX CORP. 8 May, 1967 [9 May, 1966], No. 21290/67. Headings F2E and F2L. An electromagnetic clutch and brake combination, for use in a copying machine where a single shaft is used to power and brake a roller containing printing paper, comprises an armature member 20 slidably splined on a support shaft 26 and having friction surfaces 22, 39 engageable with clutch and brake surfaces 24, 41 formed on a clutch member 16 provided with an input sprocket 18 and on a stationary brake member 42. Both the clutch and brake members 16, 42 are rotatably mounted on bearing surfaces of the support shaft 26, which is of synthetic plastics material having low friction characteristics and low moisture absorption properties. A spring 37 reacting against a shoulder of the support shaft urges the brake surfaces 39, 41 into engagement when a magnet coil 17 is de-energized The coil 17 is non rotatable and mounted by way of a plastics bearing sleeve 60 on the clutch member 16, the magnet body member 14 being fast with a housing 12 having an arm 46 extending into a slot 44 in the brake member 42. The combination forms a unit and the support shaft 26 can be slid on to a power shaft 28 of the copying machine, a facial slot 36 in the support engaging a pin 38 in the power shaft, and the support shaft being retained on the shaft 28 by a locking ring 52. The brake member is held stationary by a pin 48 extending from the machine frame into the slot 44.
Patent GB-270933-A (GB)
Title: Improvements in connection with means for the transport of goods by road and railway
IPC: B61J1/10
Filed: 1926-08-30
Abstract: 270,933. Hudson, J. T. Aug. 30, 1926. De-railing and re-railing devices. -Attachment or detachment of the wheel flanges B of a rail-and-road vehicle is effected at a siding having converging guides A at the outer sides of the rails, and a sloping platform C leading from the road to the rail level.
Patent GB-651561-A (GB)
Title: A process for the manufacture of oleo-polymers from vinyl compounds
Inventor: ROBINSON RALPH SIDNEY
IPC: C08F212/14
Filed: 1948-08-12
Abstract: An aromatic vinyl compound, e.g. styrene and methyl styrene, is polymerized with a partly polymerized ester derived from a mixture of alcohols and one or more unsaturated fatty acids containing at least eight carbon atoms, such as can be derived from a drying or semi-drying oil.  The alcohols, mono- or polyhydric, saturated or unsaturated, include, glycerol, pentaerythritol, ethylene glycol, cyclohexanol or cetyl alcohol; and the fatty acids may be derived from bodied linseed or dehydrated castor oils.  Polymerization may be effected by heat or ultra-violet light, in the presence or absence of solvents and/or water.  Catalysts, e.g. benzoyl, tertiary-butyl, phthalic and fatty acid peroxides or, if water is present, potassium persulphate and retarders, such as phenolic and amino compounds, may be used.  Driers, e.g. lead, manganese, cobalt and zinc naphthenates or linoleates may be added.  In examples, pentaerythritol is heated with bodied dehydrated castor oil and magnesium oxide under reflux in an inert atmosphere and then heated with unbodied linseed or dehydrated castor oil fatty acids at 240 DEG  C. for three hours. The products are then heated under reflux with styrene, white spirit and benzoyl peroxide, to give a product which after thinning with white spirit and addition of cobalt naphthenate gives an air-drying film.  Specification 630,022 is referred to.ALSO:Partially polymerized esters are derived from a mixture of alcohols, e.g. pentaerythritol, glycerol, ethylene glycol, cyclohexanol, and cetyl alcohol and one or more unsaturated fatty acids containing at least eight carbon atoms in the molecule, such as may be derived from linseed stand oil, or bodied dehydrated castor oil.  In examples, bodied dehydrated castor oil is refluxed with pentaerythritol in the presence of magnesium oxide at 200 DEG  C. under carbon dioxide, and (1) unbodied linseed oil fatty acids, or (2) unbodied dehydrated castor oil fatty acids were added and heating continued at 240 DEG C. for 30 minutes without the reflux condenser.ALSO:Partially polymerized esters are derived from a mixture of alcohols, e.g. pentaerythritol, glycerol, ethylene glycol, cyclohexanol or cetyl alcohol, and one or more unsaturated fatty acids containing at least eight carbon atoms in the molecule, such as may be derived from linseed stand oil, or bodied dehydrated castor oil.  In an example, bodied dehydrated castor oil is refluxed with pentaerythritol in the presence of magnesium oxide at 260 DEG  C. under carbon dioxide, and (1) unbodied linseed oil fatty acids or (2) unbodied dehydrated castor oil fatty acids are added and the heating continued at 240 DEG C. for 30 minutes without the reflux condenser.
Patent GB-449056-A (GB)
Title: Preparation of reversible rubber compositions from rubber latex and their reversal
IPC: C08J3/03
Filed: 1934-12-18
Abstract: Latex is stabilized by the addition of a water-soluble hydrophilic stabilizer capable of being insolubilized and subsequently rendered soluble; it is flocculated by the addition of a chemical which insolubilizes the stabilizer; the flocs are de-watered to a semi-solid mass, and finally reverted to latex by the addition, of water and a chemical which resolubilizes the stabilizer.  Suitable stabilizers are soluble caseinates, albuminates, and the like, and the flocculating agents are preferably heavy metal salts such as those of zinc, calcium, or magnesium, which form insoluble caseinates &c., but which form soluble compounds with ammonia.  After flocculation, water is removed from the mass until it becomes semi-solid containing however, at least 20 per cent of water.  This process is preferably carried out on the plantation.  Reversion is effected by the addition of water and ammonia, and may take place, after shipment, or on the plantation to yield a transportable concentrated latex.  Reversion is expedited by comminuting the moist mass before adding the water and ammonia.
Patent GB-213582-A (GB)
Abstract: 213,582. Lentz, H., (Assignee of Heyrowsky, A.). March 26, 1923, [Convention date]. T'ariable-speed ratchet gearing comprises reversible friction ratchet grips comprising balls 5, Fig. 4, rollers 5<1>, or wedge segment pieces 5<11>, which jam in either direction at will. These gripping devices oscillate in arc-shaped recesses 2<11> and are controlled by a spring- pressed cage 4, which is displaced angularly with respect to the driven drum or rotor 2 to reverse or to disconnect the drive. This is effected through a radial pin 18, a rod within the shaft, and a sleeve with pin moving in a helical groove. The speed may be varied by varying the throw of a driving eccentric 8, Fig. 1. By the use of crossed slots 19, 20, the active part of the throw of the oscillator 3 may be modified. Alternatively, the speed may be varied by changing the obliquity of a guide-slot 23, Fig. 2, in a control disc 24, which turns on a fixed pivot 36. A pin 28 reciprocated in the slot 23 by a crank 22 and rod 13 reciprocates also in a slot 19 in the oscillating member 3, to which a variable throw is thus given. In a further form shown in Fig. 3, the guide, slot is replaced by the arc struck by a link 27 with adjustable fulcrum 26. Practical embodiments suitable for motor vehicles are described. In one of these, the throw of the variable driving eccentric is adjusted by a sliding helix. In another, shown in Fig. 9, a roller 21 projects from an eccentric groove 34 in the revoluble driving member into an arc-shaped slot 35 in the oscillator 3. By shifting the pivot 31 about which as centre the roller 21 is constrained to oscillate, the amplitude of the oscillator 3 is varied.
Patent GB-1223564-A (GB)
Title: Improvements in or relating to track chains and to tracked vehicles including such chains
Inventor: MAURICE GEORG WILLIAM
IPC: B62D55/24
Filed: 1967-05-09
Abstract: 1,223,564. Endless-tracks. INTERNATIONAL HARVESTER CO. OF GREAT BRITAIN Ltd. 8 May, 1968 [9 May, 1967], No. 21408/67. Heading B7H. To prevent extension of chain pitch caused by wear between the usual link connecting pins and bushes in a conventional track chain for a tractor, the pins and bushes are replaced by lengths of metal wire rope 6 longitudinally arranged between and connected to adjacent chain links 2 whereby the chain pitch remains constant thus extending the life of the chain track and its associated driving and idler sprockets. As shown, each pair of adjacent links 2 are connected by four wire ropes 6 having swaged ferrules 9 at their ends which locate in corresponding sockets 10 in the links, each link 2 thus having 8 wire ropes 6 arranged four each side of the link centreline and directed in pairs each side to the oppositely adjacent links 2. Flared bearing surfaces 8, 7 in the link ends are provided to support the wire ropes 6, and correspond respectively to the assumed form of the chain track as it passes over uneven ground surfaces and over the chain sprockets, the sprockets (not shown) having involute form teeth engaging corresponding teeth 11 centrally formed in the links.
Patent GB-1463778-A (GB)
Title: Electrical machines
IPC: H02K5/14
Filed: 1975-05-20
Abstract: 1463778 Electrical machines ROBERT BOSCH GmbH 20 May 1975 [14 Aug 1974] 21408/75 Heading H2A An electrical machine has an iron magnetic flux return ring, field magnets secured in position on an inner wall of the ring by holding members, and a brush support which abuts the flux return ring, the holding members each being moulded on to the brush support in one piece. In the motor arrangement shown, a pair of annular permanent magnets 15 are secured against an inner wall 14 of a flux return ring 10 by a pair of bifurcated members 19 (only one illustrated in Fig. 2) projecting axially from, and moulded on to, a brush support 17 of flexible synthetic material, the end parts 23 of each member 19 being forced apart by a spring 24 to wedge tightly against the magnets 15. The support 17 carries two brush holders 18 (only one in Fig. 2), and has slotted guides 27 which are pushed on to the limbs 13 of a U-shaped bearing bracket 12 which is fixed to the ring 10. When the support 17 is mounted, stop shoulders 28 on the limbs 13 engage the support to prevent movement in one direction, and the front face 11  of the ring 10 is abutted by further projections 30 on the support 17 to prevent movement in the opposite direction. The spring for forcing the end parts of the projections 19 apart may be undulating or horse-shoe shaped and formed of wire (as in Figs. 5a, 5b, not shown), or it may be formed of a resilient band (Fig. 6a, not shown) and toothed (Fig. 6b, not shown).
Patent GB-392776-A (GB)
Title: Improvements in or relating to rail motor vehicles or tractors provided with endlesstracks
IPC: B61C11/00
Filed: 1932-07-29
Abstract: 392,776. Endless-track' vehicles. KEGRESSE, A., 156, Rue Armand Silvestre, Courbevoie, France. July 29, 1932, No. 21448. Convention date, Aug. 7, 1931. [Class 79 (i).] A rail motor vehicle or tractor is provided with an endless-track propelling system 11 engaging the rails, and a system of guiding wheels 3, the tracks and the wheels being connected to the vehicle frame by resilient means such as springs 5. In the construction shown the vehicle frame 1 is supported on two bogies 2 each having at least two flanged wheels 3, and a pair of tracks 11 driven by an engine (not shown) through a driving sprocket axle 6. Rollers 4 run on the tracks and are connected to the frame by the springs 5. In a modification the vehicle is supported on two or more sets of endless tracks. The track may comprise a belt 9 of rubbered fabric, carrying metal plates 10 arranged to touch each other, rubber blocks 11 also touching each other being mounted on the plates 10.
Patent GB-584701-A (GB)
Title: Improvements in resilient mounting
IPC: F16F3/087
Filed: 1944-11-02
Abstract: 584,701. Resilient mountings. UNITED STATES RUBBER CO. Nov. 2, 1944, No. 21448. Convention date, Nov. 6, 1943. [Class 108 (iii)] A resilient mounting, Fig. 1, comprises a base 11 having soft resilient disc shaped members 14, 15, Figs. 6, 4, respectively, on opposite sides thereof each having projections (33, 24 respectively) on one of its sides in staggered relationship to projections (34, 36) on the opposite side, plates 16, 17 positioned on opposite sides of the base 11 with the resilient members 14, 15 arranged therebetween so that the plates 16, 17 and base 11 are in contact with the free ends, but are spaced from the bases, of the projections, and securing means extending through aligned openings in the base 11 and members 14, 15. As shown the securing means comprise a tubular member 18 riveted at respective ends to the plates 16, 17. The lower resilient member 15 has an annular flanged portion 28 extending through the base 11 and provided with projections 29, 31 on its inner and outer surfaces engaged respectively by the sides of the member 18 and a flange 36 surrounding the opening in the base 11. A bolt 23 secures the mounting to the object 13 to be supported. In operation normal load applied to the projections of each member 14, 15 flexes the body of the member while excessive load is supported by purely compressive stress each projection entering and filling the valley between adjacent projections on the opposite side of the member.
Patent GB-406656-A (GB)
Title: Advertising display
IPC: G09F19/00
Filed: 1932-07-29
Abstract: 406,656. Changing signs. HODGKIN, D. C., 212, Warren Avenue East, Detroit, Michigan, U.S.A. July 29, 1932, No. 21472. Drawings to Specification. [Class 3 (i).] In advertising devices in which change of appearance is effected by alternately illuminating by reflected and transmitted light, the display is represented in transparent colouring matter on the front face of the sign, and transparent colouring matter is applied to the rear face so as to cause total absorption under transmitted light of required parts of the display. The display to be viewed by transmitted light is formed of transparent colouring matter which is complementary to, but in different positions from, the parts rendered invisible. Neutral colours may be employed.
Patent GB-625520-A (GB)
Title: Improvements in or relating to resilient floors
IPC: E04F15/22
Filed: 1947-08-06
Abstract: 625,520. Floors. WILLIAMSON, G. S. Aug. 6, 1947, 21473. [Class 20(iv)] A resilient floor comprises resilient granular material 17 filling the spaces between spaced parallel thick-walled rubber &c. tubes 12 laid on a rigid evensurfaced underfloor (e.g. of wood or concrete), and a surface layer of sections 19 of flexible sheet material whose joints are sealed with a plastic medium. In the form shown, overlapping strips of hessian 18 are included whose ends, together with those of the tubes, are embedded in plaster strips at the floor edges. The tubes are spaced intermediate their ends by loops of tape sewn to fabric strips laid across the normal wood boards 10 of the underfloor, and are secured by adhesive to the latter. The material 17 may be of suitably sized cork granules, and tongued and grooved compressed cork squares 19 with rubber cement on their undersides and in their joints may be used as a waterproof surface layer.
Patent GB-702956-A (GB)
Title: Method and apparatus for spinning or multiple twisting of threads
IPC: D01H7/18
Filed: 1951-09-12
Abstract: 702,956. Spinning or twisting thread NETELENBOS, W. J., OTGER, M., and ROBBENHAAR, J. G. Sept. 12, 1951, No. 21479/51. Classes 120(2) and 120(3) A method for spinning a thread or for multiple twisting of a plurality of threads without a balloon or with, a suppressed balloon in which the thread or each thread is guided along a helicoidal path on a spindle and a tube mounted thereon and is then wound on the tube is characterized in that the thread or each thread, on its path to the winding- on point, is guided over one or more protruding parts on the surface of the tube such that the thread or each thread during spinning or twisting contacts the said surface at a few places 31 only. As shown, the tube 4, around which the thread 7 is wound in a helicoidal path before passing through the traveller 6 to be wound on the said tube 4, is provided with annular protuberances 8, 9, 10. The spindle neck 2 has similar protuberances 11, 12 and a head formed by bodies 1 having a number of circumferential protrusions. Other types of spindle necks are shown as having cylindrical and inwardly tapering configurations or being provided with a helicoidal ridge or constituted by a helicoidally wound strip.
Patent GB-872137-A (GB)
Title: Brassiere
IPC: A41C3/00
Filed: 1959-06-23
Abstract: 872,137. Brassieres. FORMFIT CO. June 23, 1959 [July 28, 1958], No. 21547/59. Class 141 Elastic strips 18 are secured along the side and top edges of the breast cups of a brassiere and are each formed with a loop 20 for connection with the respective shoulder strap. The strips are connected at the front by an openwork seam 24, and each cup is secured to the adjacent portion 28 of the body-encircling band by a seam 32 formed with elastic thread. The side and back portions 26, 36 of the body-encircling band are elastic in the horizontal direction and the elastic rear portions 34 of the shoulder straps are secured along the upper edge of the back portion.
Patent GB-357316-A (GB)
Title: Improvements in temperature controlled safety or alarm devices for heated apparatus
IPC: G08B17/06
Filed: 1930-07-17
Abstract: 357,316. Temperature alarms. FOSTER, C. E., Elm Tree House, Letchworth Lane, Letchworth, Hertfordshire. July 17, 1930, No. 21652. [Class 47 (i).] A thermal switch for use in the protection of heated apparatus against excessive temperatures comprises a tube m which contains contacts r, s immersed in mercury n, and which rests on a hinged platform h. The latter is normally held in horizontal position by a weighted rod c that is slidable in a tube a and rests on a block of material b adapted to melt at a predetermined temperature. The tube a is inserted in the apparatus to be protected. At the predetermined temperature, the block b melts, allowing the tube m to move to an inclined position, so that the mercury leaves the contact r. The switch may be arranged in an electric-alarm system, may control the operation of a motor adapted to close the damper or shut off the heat supply of a gas, oil, or solid fuel furnace, or may be arranged to break the heater circuit in electrically-heated apparatus.
Patent GB-728606-A (GB)
Title: Electric resistance devices
Inventor: EISLER PAUL
IPC: H01C17/23
Filed: 1952-08-28
Abstract: 728,606. Microphones and variable resistance instruments. TECHNOGRAPH PRINTED CIRCUITS, Ltd. Aug. 27, 1953 [Aug. 28, 1952], No. 21674/52. Class 40 (4). [Also in Groups XXXVI and XXXVIII] An electric resistance ribbon device, made by removing all but a pattern from a sheet of metal foil on an insulating base, has its resistance value adjusted by thinning down at least part of the pattern. A bimetal sheet of a copper base 51 (Fig. 13) with a layer 50 of gold or platinum or noble metal alloy, or nickel-copper alloy on an iron base, has the layer 50 masked by a material 52 resistant to etching to cover a narrow ribbon-like path 13 (Fig. 1) of parallel spaced lengths, and a further etch-resistant layer 53 over the free face of the copper base. After etching treatment a series of cavities 54 (Fig. 14) are left, the resistant materials 52, 53 are removed, e.g. by solvents, and a layer of lacquer 55 (Fig. 15) applied. Finally, the base material 51 is removed by a further etching process, leaving a ribbon of conductive material 50 (Fig. 16) of the desired shape embedded in a layer of lacquer 55. The conductive ribbon 13 (Fig. 1) is preferably made to have two wide terminal areas 12, which may be extended to act as connecting leads, or to which leads 16 may be added for soldering, the ends of the terminal areas 12 being then reinforced by retaining some of the copper base material 15. To adjust the resistance of the unit to a desired value, the ribbon is provided at one end with a series of parallel paths connected together by bridges 34, 35, 36 (Fig. 10), which may be severed as required to give the desired value. In addition, the thickness of the foil may be adjusted by thinning, e.g. by polishing or etching, or by tinning, as required. Several resistance units may be manufactured side by side on a continuous strip, or located back to back on either side of a layer to be stressed by bending for use e.g. as a gramophone pick-up. The ribbon may be protected by a further covering of insulating lacquer, or may, be cemented to the body to be tested and all the lacquer removed. Specifications 639,178, 690,691 and 710,235, [all in Group XXXVI] are referred to.