baber/WOPTO huggingface dataset:
Patent GB-1071307-A (GB)
Title: Process for the preparation of finely divided, insoluble and infusible melamine-formaldehyde condensation products
IPC: B01J19/06
Filed: 1966-02-08
Abstract: Infusible and insoluble melamine-formaldehyde condensation products having a mean particle size <1m  are prepared by reacting an aqueous solution of melamine and formaldehyde or an aqueous solution of a melamine-formaldehyde precondensate, in the presence of a protective colloid in the pH range 6 to 8 until a solid phase is formed. Reaction is preferably carried out at elevated temperature, e.g. at the boiling point of the solution.  1.5 to 6 mols. of HCHO may be used per mol. of melamine. Other aminoplast forming compounds (e.g. urea and its derivatives and other amino-triazines) may also be present.  Examples of protective colloids are starch, tragacanth, gelatine, agar,-agar, polyvinyl alcohol, the sodium salt of carboxmethylcellulose and a hydrolysed polymer of maleic anhydride and styrene.  The amount of protective colloid used may be 0.1 to 10% by wt. based on the total amount of aqueous reaction mixture.  The starting solution may contain from 5 to 25% by wt. of resin-forming constituents.  The precipitation reaction may be carried out at the boiling point of the reaction mixture.
Patent GB-785940-A (GB)
Title: Aircraft and the propulsion mechanism therefor
IPC: B64C39/00
Filed: 1955-02-24
Abstract: 785,940. Aircraft. SARKISSIAN, A. DER. Feb. 24, 1955 [March 9, 1954], No. 5540/55. Class 4. An aircraft comprises a shell having an upper portion 12 open to the ambient air on one side 85 thereof, a lower portion 11 open to the ambient air on the opposite side 91 thereof, and propulsive and steering means comprising an upper rotatably mounted bladed member 25, a lower rotatably mounted member 26, the blades 80 of the upper member passing through the upper open portion 85, and the blades 86 of the lower member passing through the lower open portion 91, and means, e.g. electric motors 30, for selectively rotating the members at the same or different speeds in opposite directions, or rotating one member while the other is stationary. In Fig. 5, a cabin 16 is defined by.walls 18 depending from the upper portion 12, and by a floor 19, spaced from the shell portion 11 by a passageway 20. The bladed members 25, 26 are channel-shaped rings, and are positioned by sets of rollers 44, 45, Fig. 7, and 67, 68 mounted on frames 34, 60 attached to plungers 39,65 sliding in bores 32, 58 in pillars 31, 57. The shell is circular in plan form, and pillars 31,57 are disposed at suitable angular intervals, e.g., 90 degrees. Fluid pressure in bores 32, 58 is controlled through pipes 47, 69, to adjust the frictional contact between the rings and the enlarged portions 28 of the shafts of electricmotors 30. An aperture 92 in the base 11 of the shell is openable by a hydraulically-controlled closure member 93. A further aperture is provided on the periphery at the rear of the shell, similarly controlled. In operation, air is  sucked in through the opening 85 by the blades 80, 86, and is passed through the passageway 20, and may, e.g. for take-off, be ejected through opening 92. The action of blades 86 on the ambient air is to balance the craft laterally against the action of blades 80. For forward flight, the aperture at the rear of the shell, which communicates with passage 20, is opened, and an attainment of sufficient forward speed, lift is obtained from the incidence of the whole shell on the airstream. The floor 19 of the cabin is insulated as at 21 as the air is compressed in passage 20 and heats the floor. The blades 80, 86 are concave towards their direction of motion, and the upper edge of each overhangs the lower. By pressing the rings onto the drive shafts of the motors at different pressures, the rings 25, 26 are made to rotate at different speeds, controlling the craft in yaw. In the modification of Fig. 10 (not shown) a further pair of contrarotating rings are disposed in the vertical fore-and-aft plane, being housed in extensions of the shell which are cut away in a similar manner to the portions 11, 12.
Patent GB-1433671-A (GB)
Title: Windscreen wiper
IPC: B60S1/38
Filed: 1974-02-06
Abstract: 1433671 Windscreen wipers TRAPEZ ANSTALT 6 Feb 1974 [12 Feb 1973] 05571/74 Heading A4F A windscreen wiper comprises three components, namely a plastics wiper blade holder 1, a plastics element 3 for pivotally attaching the holder 1 to a wiper arm, and a wiper blade. The holder 1 comprises two adjacent curved arms 1 joined by bridges 6, and having longitudinally spaced flanges 7 which define a slot for retaining the wiper blade. The thickness of the holder progressively increases towards its central portion which may be provided with pivot pins which engage in holes 16 in the resilient sides 11 of element 3. The element 3 may receive a curved wiper arm end portion curving between a bridge 12 and tongue 14 to engage nose member 15. Alternatively, for use with a straight wiper arm Figs. 9 and 10, (not shown), a bridge portion of the element 3 is provided with an aperture to accommodate a projection on the arm. The element 3 may also be provided with an integral vane (21) which produces a force to increase the contact of the blade with the windscreen. The preferred dimensions of the various elements are given.
Patent GB-191976-A (GB)
Title: Improvements in supporting and propelling means for motor vehicles
IPC: B62D57/00
Filed: 1922-02-25
Abstract: 191,976. Nilsson, F. A. Feb. 25, 1922. Propelling by means other than adhesion driving wheels and racks.-In vehicles supported and propelled by reciprocating legs the operating mechanism for each leg includes a variable gearing controlled by the leg itself for giving a relatively quick return or non-operative movement. In the construction shown in Figs. 1 and 2, the upper ends of the legs 1 are guided vertically by linkwork 2 and each carries intermediately a roller 7 which is adapted to follow round an internal cam surface 8 fixed to the vehicle frame 50 so that the foot 17<1> follows the path 18 relatively to the vehicle frame, the lower part of this path being straight. Motion is imparted to the leg by a toothed pinion 4 rotating in bearings on the frame 50 and engaging the outside of a toothed cam 3 fixed to the leg. Both the pinion 4 and the toothed cam 3 are formed with smooth roller faces 5, 6 to prevent too deep engagement of the teeth. The speed of the driving pinion 4 is varied so as to give, during the complete movement of the leg, a period of slow movement and a period of rapid movement corresponding respectively to the forward and return parts of the movement. This is effected by driving the pinion 4 from the chain sprocket 9 through an epicyclic gear, the sprocket 9 being connected to the sun wheel 10, the planet wheels 11 being connected to the toothed pinion 4 and the internal gear casing 15 being moved alternately in opposite directions by means of a toothed sector 17 which engages a toothed wheel 16 on the casing 15 and is carried on one arm of a bell-crank lever 18, the other arm being oscillated by a link 19 connected to the leg 1. The extent of movement of the casing 15 may be varied by adjusting the point of connection between the link 19 and the bell-crank lever. In a modification of this feature, the pivot of the bell-crank lever is adjustable. In a modified construction of the apparatus, the cam and sector mechanism operates on a lever which is connected to an intermediate part of the leg. Separate teams of gear of different ratio operating alternately may be employed instead of the epicyclic gear. The legs may be employed in pairs with the feet 17<1> overlapping as shown in Fig. 2 to obtain a narrow rack.
Patent GB-711573-A (GB)
Title: Screw thread calliper gauges
IPC: G01B3/40
Filed: 1952-03-04
Abstract: 711,573. Gauging screw-threads. TOLIMIT GAUGES, Ltd., WILLS, S. A., and GATHERCOLE, E. F. J. March 4, 1952, No. 5666/52. Class 106 (2) A screw-thread calliper gauge of the " go and notgo" type comprises gauging members such that the "go" pair are prevented from free movement relatively to the body of the gauge whereas the " not-go " pair are free to float in the transverse direction, i.e. parallel to the axis of the screw-thread being gauged. The invention is shown applied to the gauge described in Specification 711,541. Passing transversely through the flanges 11 which support the " go " rolls are adjusting screws 22 by which these rolls may be accurately adjusted endways so as to bring the thread formation of each roll into correct alignment with the other and also prevent endwise movement after correct adjustment. Rotation of the rolls during gauging is prevented by a locating needle 24 for each roll fitting into a hole midway along the roll and entering a bore 25 in the pin 18. Each pin 18 has a slot 26 narrower than the bore 25 in which a pin 24 can move a limited distance while each pin 24 is supported in the body only by a screw formation 27 at its outer end so that it is sufficiently flexible to allow endwise movement of its roll for free movement in the case of the " not-go " rolls and for adjustment in the case of the "go" rolls. The end surfaces of the " go " rolls 14 which are engaged by the adjusting screws 22 are machined accurately perpendicular to the pins 18 so that, after release of the needles 24, they may be turned to a new position without affecting their endwise setting. Alternative circumferentially spaced holes midway along the rolls are provided for selective engagement by the locating needles. Specification 711,540 also is referred to.
Patent GB-1152981-A (GB)
Title: Improvements in or relating to the manufacture of Chlorinated Hydrocarbons
Inventor: BROWN JOSEPH HORSEFIELD
IPC: C07C17/361
Filed: 1966-02-09
Abstract: 1,152,981. Carbon tetrachloride; perchloroethylene. IMPERIAL CHEMICAL INDUSTRIES Ltd. 30 Jan., 1967 [9 Feb., 1966], No. 5680/66. Heading C2C. Carbon tetrachloride is produced by bringing a feed of C 1-3  chlorinated aliphatic hydrocarbons or mixtures thereof, which may contain not more than 15% by weight of chlorinated C 4  hydrocarbons, into reaction with chlorine in a fluidized bed of inert material with a contact time of at least 10 seconds at a temperature in the range of 550-650‹ C., quenching the exit gases by contacting them with a circulating stream of reaction product to cool the exit gases to below 350‹ C. in less than 3 seconds, at least 1À5 moles of Cl 2  being employed per mole of organic feed. Perchloroethylene is usually obtained in addition to carbon tetrachloride.
Patent GB-626941-A (GB)
Title: Improvements in or relating to electrical integrating circuits
IPC: H03K4/26
Filed: 1946-02-23
Abstract: 626,941. Valve generating circuits. FAUDELL, C. L. Feb. 23, 1946, No. 5690. [Class 40 (vi)] An electrical integrating circuit comprises means for charging a storage condenser, a pair of unilateral conducting devices connected in series across the condenser, and means for applying voltage pulses to the common point between the devices so that both devices become conducting to cause the condenser electrodes to be brought to fixed potentials. Fig. 2 shows a sawtooth oscillation generator resembling that described in Specification 461,325. Condensers 1 and 10 are charged from a source including the H.T. and a negative bias voltage, and periodically discharged through diode 4. The output from the condenser potentiometer 1, 10, is applied to amplifying valve 12 and thence to output circuit 14. The cathode of diode 4 is connected to the output circuit of valve 12, so that it is maintained at a positive potential during the stroke. When the potential of the anode of diode 4 is sufficient for this diode to conduct, a negative pulse is applied to the diode cathode from the output circuit, thus accelerating the process and decreasing the time of discharge of condensers 1 and 10. The arrangement is such that when the value of the negative pulse applied to the cathode of the diodes exceeds the value of the bias voltage, diode 6 starts to conduct, whereby condensers 1 and 10 are discharged substantially to zero, so that the amplitude of the sawtooth wave is thus rendered independent of the value of the negative pulse, which it is stated may be affected by the adjustment of control circuits. Fig.. 3 shows a modification in which condenser 24 is charged and periodically discharged to provide the timing circuit. The grid-cathode, and the diode-cathode portions of valve 26 correspond respectively to diodes 4 and 6 in Fig. 2. The main triode portion of valve 26 is arranged to act as the intermittent discharge valve for condenser 1 which is charged via resistors 3 and 21, thus providing a sawtooth waveform which is amplified by valve 12. Amplitude control is provided by connecting condenser 1 to a tapping on cathode resistor 21. Fig. 4 (not shown) describes a modification in which the cathode of valve 26 of Fig. 3 is earthed, and resistance 7 is connected to the output circuit 14. The invention may also be used to control the discharge of condensers in pulse generator circuits.
Patent GB-1098466-A (GB)
Title: Sensitive photographic materials
Inventor: DUNN JOSEPH STANLEY
IPC: G03C1/725
Filed: 1965-02-10
Abstract: 1,098,466. Sensitized silver halide emulsions. EASTMAN KODAK CO. Feb. 10, 1965 [Feb. 10, 1964], No. 5713/65. Heading G2C. A photographic silver halide emulsion is sensitized with a noble metal (Au, Pt, Pd, Ru, Os, Ir or Rh) sensitizer and selenium or a labile selenium compound e. g. allyl isoselenocyanate, selenoacetone, selenoacetophenone, selenourea, diethyl selenourea, tetramethyl selenourea, N, N dimethyl selenourea, N-(#-carboxyethyl)-N', N'-dimethylselenourea, selenoacetamide, diethyl selenide, 2-seleno propionic acid, 3- selenobutyric acid, methyl 3-selenobuyrate and isoseleno cyanates and selenoureas containing aromatic and heterocyclic radicals. Many gold sensitizers are specified including potassium chloroaurate and aurous thiousulphate. The sensitizers are preferably added to the emulsion after Ostwald ripening. The emulsion may contain a water soluble thiocyanate e. g. a sodium, potassium or ammonium thiocyanate; polyvinyl lactams and acrylic polymers e. g. polyacrylamide to prevent density loss on drying; carboxymethyl proteins and polysaccharides to increase covering power of the silver image; speed increasing compounds e. g. tetradecamethylene bis(pyridinium perchlorate), polyethylene glycols and polythioethers; and antifoggants e. g. 5-(4-cyanophenyl) tetrazole monohydrate.
Patent GB-579148-A (GB)
Title: Improvements in and relating to tools for dimpling rivet holes
IPC: B21D22/04
Filed: 1945-03-07
Abstract: 579,148. Pliers. BLACKBURN AIRCRAFT, Ltd., and SEAL, J. March 7, 1945, No. 5719. [Class 61 (ii)] The plunger 8 of a pistol grip tool for. dimpling rivet holes is provided at one end with a conical projection 8<1> and at the other with a cam surface 8<2>. The plunger 8 slides in an axial bore 7 in the body portion 1 which has a jaw 2 made fast to the handle 3 by plates 4, 5 and 6. A compression spring 9 operates in the axial bore 7 in order to urge the plunger into retracted position.' A circular disc 13 is rotatably mounted in the jaw 2 and is provided with a plurality of conical depressions of various sizes which coact with the forward end of the plunger 8<1> to form dimples around rivet holes. The plunger 8 is actuated by rocking the trigger 10 provided at one end with a cam surface. 11 which coacts with the cam surface 8<2> on the plunger 8.
Patent GB-1181372-A (GB)
Title: Method for Reducing Greying of Titanium Dioxide Pigmented Compositions
IPC: C09C1/36
Filed: 1967-02-07
Abstract: 1,181,372. Titanium dioxide compositions. COSDEN OIL & CHEMICAL CO. 7 Feb., 1967 [8 Feb., 1966], No. 5727/67. Heading C3P. The greying of titanium dioxide pigmented compositions imparted during abrasive mixing, i.e. dry mixing in contact with metallic surfaces under conditions where the metal rubs off and discolours the pigment, is reduced by carrying out the mixing in the presence of up to 1% by wt. of a friable, dust-forming, colourless, alkaline inorganic solid containing or producing during the mixing particles having a size of less than 60 mesh U.S. Standard Sieve. The solid may be sodium hydroxide, calcium oxide, barium oxide, strontium oxide, magnesium oxide, calcium hydroxide, sodium bicarbonate, potassium carbonate, or sodium aluminate or borate and may contain an oxidizing agent, e.g. potassium persulphate or hydrogen peroxide. The composition may comprise particles, e.g. beads, of polystyrene.
Patent GB-1531433-A (GB)
Title: Pyrophosphate and silica-containing composition
IPC: C11D3/08
Filed: 1976-02-13
Abstract: 1531433 Detergent additive PROCTER & GAMBLE CO 13 Feb 1976 [14 Feb 1975] 05745/76 Heading C5D A detergent additive comprises an alkali metal pyrophosphate and silica, including partly hydrated silica and alkali metal silicates having a molar ratio of SiO 2 :M 2 O greater than 4:1, having a mean particle diameter less than 20 microns in a weight ratio of pyrophosphate to silica of 25:1 to 1:2. The pyrophosphate may be sodium pyrophosphate, potassium pyrophosphate, or a mixture of the two. The additive may be present in detergent compositions which comprise 5 to 60% by wt. of the pyrophosphate, 1 to 40% by wt. of the silica and 1 to 50% by wt. of organic detergent, such as an alkoxylated alcohol or alkyl phenol, an ether sulphate, an α-sulphocarboxylate, an alkyl benzene sulphonate, an alkyl sulphate or a mixture thereof. The compositions may also contain sodium carbonate and alkali metal silicates having the wt. ratio SiO 2 :M 2 O from 1À6:1 to 4:1, where M is alkali metal. The compositions may be in liquid, powder or bar form.
Patent GB-606002-A (GB)
Title: Improvements in railway chairs and chair keys
IPC: E01B9/58
Filed: 1946-02-25
Abstract: 606,002. Railway chair keys. BILEFELD, J. Feb. 25, 1946, No. 5748. [Class 104 (ii)] A reversible chair key, engaging the upper and lower rail flanges, has a plurality of grooves or holes so as to provide multiple alternative fixings for gib keys or bolts securing it to the chair. In one form, Fig. 6, the chair A has three keyways for one or more rectangular gib keys C whilst the key B has a number of keyways on both faces of the same pitch as the chair keyways. Bolts D, Fig. 7, may be used engaging semi-circular keyways, the bolts screwing into the base of the chair. In another form, Fig. 8, two set-screws E are screwed into tapped holes d in the chair jaw L and enter holes in the key. The keys C and bolt D with their keyways may be tapered.
Patent GB-547924-A (GB)
Title: Process for proofing animal fibres against moth and beetle larvae, mould and rot
Filed: 1941-05-03
Abstract: 547,924. Mothproofing. THOMAS, A. May 3, 1941, No. 5779. [Class 140] Animal fibres, e.g. fabrics, fur, feathers and leather. are proofed against moth and beetle larvae, mould and rot by treatment with a dilute solution of sodium fluoride so that 0.25 to 0.5 per cent. of fluoride is taken up by the fibres, without subsequent rinsing of the material. Reference has been directed by the Comptroller to Specifications 235,914, 235,915 and 236,218, [all in Class 140].
Patent GB-665641-A (GB)
Title: Improvements in flexible shutters
IPC: B61D19/00
Filed: 1949-03-03
Abstract: 665,641. Roller shutters; sliding doors. NORMAND, Ltd., HICKLING, E. H., and BUTLIN, W. March 3,1950 [March 3, 1949], No. 5840/49. Class 20(iii) A roller shutter is made up of a number of. sheet metal slats connected along their horizontal edges by hinges whereof the hinge pins project beyond the slats and are located by channel section guides, the top of the shutter being secured to means for assisting its upward movement. The drawings show the shutter adapted to form the rear door of a motor van. It consists of a number of sheet aluminium slats 1 connected together by hinges 2. The hinge pins 2a project beyond the side edges of the shutter and carry rollers 3 which run in channel section guides 4. The guides are curved at the top and extend horizontally beneath the roof of the van, the top of the shutter being secured by fabric tapes 7 to a spring roller (not shown), which assists in raising the shutter. To make the shutters weatherprocf, the slats are shaped to overlap, and side and top weather plates 19 and 18 are provided.
Patent GB-806559-A (GB)
Title: Transistor switching device
IPC: H03K17/60
Filed: 1957-02-21
Abstract: 806,559. Transistor relay circuits. SOURGENS, R., and CHOLLET, R. Feb. 21, 1957 [Feb. 29, 1956], No. 5846/57. Class 40 (6). In a circuit in which the supply potential B, Fig. 1, exceeds the safe potential to be applied across the emitter-collector path of transistors 1, 2 the emitter of each is directly connected to the collector of the preceding transistor with the final transistor connected to a load 27 and the input applied to the base-emitter path of the first transistor. The collector of each transistor is connected to the supply over resistors 22, 23 with a resistor 21 connected between the junction of the resistors 22, 23 and earth. The value of the resistors 21, 23 is so chosen that when the transistors 1, 2 are cut-off the potential existing across the emitter-collector path does not exceed the safe value. Assuming transistor 1 to be cut-off the collector potential is negative with respect to earth causing the emitter to cutoff the next transistor 2 so that the load 27 is not energized. When a negative-going potential is applied to the base of transistor 1 the transistor passes collector current, causing the collector potential to rise and therefore the emitter potential of transistor 2 so that it also passes current to energize the output load 27 which may be a relay. In order to obtain a more effective cut-off a resistor 24 of low value may be included between the resistors 22, 23 and the base of the transistor 2. In a modification, Fig. 2 (not shown), four transistors are arranged in cascade with the resistors 21, 23 graded according to a given formula to provide the correct operating potentials between emitter and base in the cut-off condition.
Patent GB-310606-A (GB)
Title: Improvements in or relating to headlights for vehicles
IPC: B60Q1/124
Filed: 1928-02-25
Abstract: 310,606. Ehrhard, H. A. Feb. 25, 1928. Vehicle lamps, directing; vehicle-lamp supports. - Tilting headlights are mounted on a tubular rock-shaft 25 provided with hand operating means and mounted in end bearings 33 on the mud-guards 31 or other suitable parts of the vehicle, there being a rod 29 which extends through the tubular shaft 25 and engages the bearings in such a way that they may be adjusted axially in order to cause them to exert sufficient frictional effect on the ends of the shaft 25 to retain the lamps in adjusted position. In the arrangement shown, the adjustment is effected by a nut 32 on each end of the rod' 29 engaging a wedge-shaped washer 34, the bearing 33 being thus clamped between the mudguard 31 and the end of the shaft 25. Resilient or other washers 36 may be employed between the ends of the shaft 25 and the bearings, and the latter may be split and provided with a clamping bolt 37 for increasing the frictional grip. The means described in Specification 303,766, for turning one or both of the headlights by the movement of the steering wheel, may be embodied.