baber/WOPTO huggingface dataset:
Patent GB-935067-A (GB)
Title: Improved circuit arrangement for monitoring electric heating units
Inventor: DUTHIE RAE LAWRENCE
IPC: G08B26/00
Filed: 1959-02-13
Abstract: 935,067. Protective arrangements. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 12, 1960 [Feb. 13, 1959], No. 5140/59. Class 38 (5). A monitoring arrangement for a group of electric heating units comprises a sampling circuit connectible sequentially to the units and including means for deriving a signal varying with the voltage applied to a selected one of the units, second means for deriving a second signal varying with the current taken by the selected one of the units and third means for comparing the signals and producing a third signal for the energizing of an indicating, alarm or control circuit. In the arrangement shown in the Figure, heater units HT1 . . . HT3 are star-connected to a three-phase supply SL1 . . . SL3 with the voltage signals derived by means of potential dividers PD1 . . . PD3 and the current signals derived from current transformers CT1 . . . CT3 with associated load resistors R1 . . . R3. The output terminals of the potential dividers and current transformers are connected to continuously driven ganged switches MS1, MS2 so that the current and voltage signals associated with the heating units are compared in repeated succession. A transformer T1 is connected to the switches MS1, MS2 and the output of the transformer is applied through a voltage doubling rectifier circuit VD and time delay circuit TD to the grid of a thyratron ER having a relay RL in its anode circuit. To indicate the interruption of any one of the supply lines, e.g. by the blowing of fuse, tappings are taken from voltage dividers VD1 ... VD3 to a third switch MS3 ganged to the switches MS1 and MS2, the switch MS3 being connected through a full wave rectifier RB to a relay RY. Instead of the thyratron ER, a cold cathode gas-filled triode, a transistor or magnetic amplifier may be used. The relays RL, RY control indicating or alarm circuits (not shown) and the relay RY may serve to stop rotation of the switches in a position which indicates the faulty unit.
Patent GB-285512-A (GB)
Title: Improvements in or relating to the working of concrete or similar substances into covering layers
IPC: E01C19/40
Filed: 1928-02-18
Abstract: 285,512. Haddan, R., (Maffei Akt.-Ges., J. A.). Feb. 18, 1928. [A Specification was laid open to inspection under Sect. 91 of the Acts, Feb. 20, 1928]. Surface-levelling machines; rammers.-A reciprocating cambered template board b for smoothing and tamping concrete roads is pendulously supported from a frame a running on bordering rails c, the points of suspension being adjustable to vary the lift of the board for the same degree of transverse movement. Fig. 1 shows the board suspended by chains d from supports e adjustable vertically and horizontally on the frame a, the lateral movement being imparted by a connecting-rod f and adjustable rotary crank g. During the swinging movement, each end of the board slides in turn over the rail c to cause the opposite end to rise and fall, thereby effecting a tamping action on the concrete. In the construction shown in Fig. 7, the beam is suspended from adjustable cams p on the frame bv rollers g carried by plates b<1> adjustable on the ends of the beam. The beam and frame mav be made extensible. The centre of the beam may be made vertically adjustable with respect to the end portions to suit the level of the work.
Patent GB-724426-A (GB)
Title: Apparatus for machining the linings of motor vehicle brake shoes
IPC: B23B5/04
Filed: 1953-02-25
Abstract: 724,426. Portable turning apparatus. VILLA, S. Feb. 25, 1953, No. 5278/53. Class 83 (3). Apparatus for machining the linings of motorvehicle brake shoes in situ comprises a body portion rotatably mounted by a bushing on a sleeve fitting round and locked with respect to the stub axle of a vehicle wheel, the body having an operating crank and an adjustable support carrying a tool, the support having two lateral arms and a rotatable screw, the tool being mounted in a holder threaded on the screw and sliding on the lateral arms. A pair of mounting sleeves 21, 28 are selected from a set to suit the wheel stub axle 30 and a sleeve 3 carrying bearings 2 for the rotatable body 1 of the apparatus is secured on the sleeve 21 by a nut 22. The body carries an operating handle 26 at one end and a radially adjustable tool support 5 at the other end. The latter is roughly adjusted to the diameter of the linings 31 and fine adjustment for the cut is obtained through a backing screw 12 for a cutter 23 carried in a holder 8 which is slidable along rods 9 extending at right angles from the support 5. A screw arranged between the rods 9 has threaded engagement with the holder 8 and is rotatable in the support 5 by a Geneva wheel 11, Fig. 2, secured to the end of the rod. The Geneva wheel is engaged by a member 7, Fig. 1, secured to a bracket 6 which does not rotate and is rotated one quarter turn for each rotation of the body 1 to feed the tool across the face of the lining.
Patent GB-510733-A (GB)
Title: Process for pickling siderurgical products
IPC: C23G1/08
Filed: 1938-02-19
Abstract: 510,733. Pickling iron and steel and alloys thereof. LABERGERE, J. L. A., and BRONFMA, J. Feb, 19, 1938, No. 5301. Convention date, Oct. 15, 1937. Drawings to Specification. [Class 82 (ii)] Iron, steel and alloys thereof are pickled in a bath containing 50-160, preferably 100-140, grams of sulphuric acid and 40-150 grams of iron, in the form of ferrous sulphate, per litre, at 50-65‹C., and are then washed in a bath containing 100-140 grams of sulphuric acid and 0-75 grams of iron, in the form of ferrous sulphate, per litre. A pickling bath containing 140 grams of acid and 50 grams of iron per litre is used at 55-60‹C. until the acid content falls to 100 grams per litre and the iron content has increased to 73 grams per litre : acid is then added to restore the initial concentration. This process is repeated twice bringing the iron content to 96 and 119 grams per litre respectively : the acid content is then raised to 120 grams per litre and pickling carried out to an acid content of 65 grams per litre and an iron content of 150 grams per litre. The pickling bath is then cooled to 20‹C. and the crystallized ferrous sulphate decanted off, giving an acid content of 89 grams per litre and an iron content of 75 grams per litre : the bath is diluted to give an acid content of 60 grams per litre and an iron content of 54 grams per litre and acid then added to restore the initial acid and iron contents. The washing may be so conducted as finally to obtain a bath suitable for pickling. Sulphonated coal tar compounds, such as those having a basis of sulphonated anthracene oil, may be employed as inhibitors.
Patent GB-625878-A (GB)
Title: Improvements in electrical low-frequency amplifiers
IPC: H03F1/50
Filed: 1947-02-24
Abstract: 625,878. Valve amplifying circuits. PHILIPS LAMPS, Ltd. Feb. 24, 1947, No. 5321. Convention date, March 11, 1944. [Class 40 (vi)] [Also in Group XL (b)] Distortion in a wide-band low-frequency amplifier is reduced by using a quadripole coupling containing a series arm and a shunt arm, each comprising a resistance and a capacity such that the product in the series arm equals that in the shunt arm. Phase and frequency distortion in the intervalve coupling, as shown, are eliminated by making the time constant of the capacitor C and resistor R1, in series between the input and output terminal, equal to that of resistor R and capacitor C1, in series across the output terminals. Capacitor C2 is shunted across R1 to compensate for the effect of the input capacitance of valve 2, while C2 is shunted by a high resistor R2 to facilitate the application of bias to valve 2.
Patent GB-661975-A (GB)
Title: Improvements in or relating to substituted pteridines
Filed: 1949-02-28
Abstract: 2-Amino-4-hydroxy substituted pteridines of the general formula <FORM:0661975/IV (b)/1> where R is an alkyl or substituted alkyl radical, are prepared by heating the corresponding 2 : 4-diaminopteridine in water or a substantially aqueous solvent under alkaline conditions.  The reaction may be carried out at a temperature from 80 DEG  to 110 DEG  C. from 2 to about 8 hours.  The reaction may be carried out in the absence of oxidizing agents.  The group R may be -CH2NHR1, where R1 is an aromatic radical, or -CH2NR1R11, where R1 is an alkyl or a substituted alkyl radical and R11 is an aromatic radical. Compounds which may be hydrolysed by the above process are N-[4-{[(2,4 - diaminopyrimido [4,5 - b] - pyrazyl - 6) methyl]amino}benzoyl] glutamic and aspartic acids, 4 - {N - [(2,4 - diaminopyrimido [4,5 - b]-pyrazyl - 6)methyl] - N - alkylamino} benzoic acid and the amino acid amides thereof, 2,4-diamino-6 or 7-alkyl pteridines, e.g. where the alkyl group is methyl, and 4-{[(2,4-diaminopyrimido[4,5 - b]pyrazyl - 6) - methyl]amino} benzoic acid and amino acid amides thereof.  Alkaline agents that may be used are the alkali metal hydroxides, e.g. sodium and potassium hydroxide, barium hydroxide, benzyl trimethyl ammonium hydroxide, lime and ammonia.  A number of detailed examples are given including the preparation of folic acid (pteroyl glutamic acid).  N - [4 - {[(2,4 - diaminopyrimido[4,5 - b] pyrazyl - 6) - methyl]amino}benzoyl]glutamic acid is prepared by reacting 2,4,5,6-tetraaminopyrimidine sulphate, 2,3-dibromopropionaldehyde and p-aminobenzoylglutamic acid.  4 - {N - [(2,4 - diaminopyrimido[4,5 - b] pyrazyl - 6) - methyl] - N - methylamino}benzoic acid is prepared by reacting 2,4,5,6-tetraminopyrimidine sulphate dihydrate, p-methylaminobenzoic acid and adding 1,1,3-tribromoacetone.  2,4 - diamino - 7 - methylpteridine is prepared by reacting 2,4,5,6-tetraaminopyrimidine sulphate and methyl glyoxal.  2,4 - Diamino - 6 - methylpteridine is prepared by reacting 2,4,5,6-tetraaminopyrimidine sulphate dihydrate and aqueous sodium sulphite, and adding methyl glyoxal and sodium hydrogen sulphite in water.
Patent GB-159906-A (GB)
Title: Process of electrolytically producing iron and alloys thereof
IPC: C25C1/06
Filed: 1918-03-17
Abstract: 159,906. Estelle, A. T. C. March 27, 1918. Iron, iron alloys, and oxygen, obtaining. - Smooth iron deposits are obtained from a slimy suspension of iron compounds in caustic alkali solution. Compounds of iron with oxygen and hydrogen may be employed. The liquid may contain 30 per cent of ferric hydrate and 70 per cent of a 50 per cent caustic soda solution. Oxides may be hydrated by heating with an alkali hydrate or carbonate to form a ferrite which is then hydrolyzed. Calcined ferric sulphate may, for instance, be heated to 100-120‹ C. with about 4 times its weight of 70 per cent caustic soda for 2-3 hours in a rotating iron drum with iron rollers. Sufficient water to reduce the caustic soda to 50 per cent strength is added after cooling, and the mixture may be electrolyzed directly or allowed to stand and the clear solution removed from the concentrated suspension. Oxide which has been more strongly heated requires more concentrated or anhydrous alkali and higher temperatures. Magnetite gives the corresponding hydrate, if moderately heated with a 60 per cent caustic soda solution, but more energetic treatment causes oxidation. If soda ash is used, the temperature must be raised above 849‹ C.; any undecomposed carbonate is afterwards removed by separating and concentrating the solution. During electrolysis, the electrolyte is preferably heated to 100‹ C. A current density of 3 amperes per sq. dcm. is suitable. The electrolyte may be replenished with the iron compound either inside or outside the electrolyzing tank. Oxygen is evolved at the anode. Certain metals such as cadmium are deposited as alloys with iron when their oxides of hvdrates are added. Other metals such as nickel are not precipitated under similar conditions.
Patent GB-388568-A (GB)
Title: Improvements in and relating to fuel injection pumps
IPC: F02M59/34
Filed: 1932-02-23
Abstract: 388,568. Fuel-injection pumps. DAIMLER-BENZ AKT.-GES., Unterturkheim, Stuttgart, Germany. Feb. 23, 1932, No. 5429. Convention date, Feb. 28, 1931. [Class 102 (i).] In a fuel-injection pump only the required quantity of fuel is drawn into the cylinder and a spill port is dispensed with. The piston and the cylinder, or a sleeve valve, are relatively rotatable and the suction port e is formed with a control edge e<1> co-operating with a port g in the piston which communicates with a longitudinal passage h. Return flow during the discharge stroke is prevented by a check-valve k. Alternatively the control port e may be in the piston. In a multicylinder engine, with simultaneous control of the pumps, the pumps may be arranged to come into operation in succession in any desired manner by suitable curvatures of the controlling edges e<1>.
Patent GB-787307-A (GB)
Title: Purification of wood pulp
IPC: D21C9/08
Filed: 1956-02-22
Abstract: Wood pulp is purified by treatment with a solution of 1-13 per cent of caustic alkali, based on the weight of the pulp, at a pulp consistency of 5-20 per cent for 8-240 minutes at 90-170 DEG  C., and then with a solution containing 40-220 grams per litre of caustic alkali at a pulp consistency of 2-18 per cent for 5-120 minutes at 5-50 DEG  C.  The first treatment may be preceded or followed by treatment of the pulp with a compound having oxidizing and chlorinating properties, e.g. chlorine, a hypochlorite or chlorine dioxide, and this treatment may be carried out one or more times, a mild alkali wash being interposed between successive treatments. Before or after the second causticalkali treatment the pulp may be bleached, e.g. with chlorine dioxide or a chlorite.  The second caustic-alkali treatment may be effected in an oxygen-free atmosphere, e.g. nitrogen or natural gas.  In an example, sulphite pulp is treated with a 0.09 per cent chlorine solution for 30 minutes at 20 DEG  C. and a pulp consistency of 3 per cent, and this treatment is followed by treatment with a solution of 6 per cent of sodium hydroxide, based on the weight of the pulp, at 140 DEG  C. for 18 minutes at a pulp consistency of 6 per cent.  The product is then treated with a solution containing 94 grams per litre of caustic soda at 25 DEG  C. for 30 minutes at a pulp consistency of 3 per cent, and is finally bleached with chlorine dioxide at 45 DEG  C. and a pulp consistency of 5 per cent.
Patent GB-381073-A (GB)
Title: Improvements in altimetric regulation devices for internal combustion engines
IPC: F02D9/00
Filed: 1932-02-24
Abstract: 381,073. Regulating ; spray carburetters. BIRKIGT, L. E. J., Rue du Capitaine Guynemer, Bois-Colombes, Seine, France. Feb. 24, 1932, No. 5525. Convention date, Jan. 16. [Classes 7 (iii) and 7 (vi).] The inlet to a blower b delivering air to the carburetter c is provided with a throttle valve d which is adjusted according to altitude by means of a barometric capsule s arranged in a chamber r connected by a pipe u to the delivery side of the blower. The capsule is connected to a piston valve k which controls the flow of pressure fluid, such as the lubricating-oil, to a relay piston g geared to the throttle d.
Patent GB-1268582-A (GB)
Title: Improvements relating to optical viewfinders
IPC: G03B13/02
Filed: 1970-02-05
Abstract: 1,268,582. View-finders. POLAROID CORP. Feb.5, 1970 [Feb.7, 1969], No.5531/70. Headings G2A and G2J. A view-finder for use with a camera comprises a transparent block 4 having a front partially reflecting surface 3 whose central part acts as an entrance window 9, and a rear surface comprising a spherical fully reflecting mirror 1 with a central aperture for the exit window 8 and a reticle 2, the focal length of mirror 1 being an integral multiple of the distance between the windows. External light enters the view-finder through the entrance window 9, some of which is reflected from the reticle (e.g. ray 6). This reflects from surface 3 on to the mirror 1, which reflects it back on to surface 3, and thence through the exit window to an observer. In this example, the focal length of mirror 1 is twice the distance between the windows. With the reticle at the focal point of mirror 1, its virtual image will be at infinity.
Patent GB-689424-A (GB)
Title: An improved cutting torch
IPC: F23D14/42
Filed: 1951-03-07
Abstract: 689,424. Dividing by fusion. ROSSI, G. March 7, 1951 [March 7, 1950], No. 5565/61. Class 83 (iv). In a cutting torch having at least one supporting element resting on the surface to be cut, a vibrating device transmits vibrations to the torch and/or element to allow free creeping motion of the element over the work surface. In an embodiment oxygen and acetylene are fed by ducts 6 and 8 respectively to a mixing chamber in the handle A of the torch and the mixture is fed by a duct 2 to the nozzle 4. A rod 12 adjustably secured to the nozzle 4 by a collar 32 and screw 34 rests on the work B. Oxygen for the nozzle 4 is supplied through a duct 10 to rotate a rotor 14 carrying an eccentric weight 16 to produce vibrations which are transmitted to the nozzle 4 and rod 12. In one modification an electro-magnetically operated spring-urged vibration member is arranged on the nozzle 4 and in another a spring-pressed vibrating piston is arranged in the nozzle in the oxygen supply line a reciprocating motion parallel to the jet being produced. In a further modification the rod 12 is vibrated by a spring-urged piston connected thereto and arranged in the oxygen supply line. The torch may be of the oxy-electric arc type.
Patent GB-1123512-A (GB)
Title: Ratchet winch
IPC: B66D5/00
Filed: 1967-02-06
Abstract: 1,123,512. Manually operated winches. W. L. BLACKBURN. 6 Feb., 1967, No. 5657/67. Heading B8B. A ratchet winch for a cable 40 interconnecting a barge train comprises a base-plate 12 having side plates 14 rotatably supporting a shaft 16 therebetween, a cable drum 26, ratchet wheel 18 and hand wheel secured to the shaft 16, and manually operable reciprocating means 20 for driving the ratchet wheel 18. A releasable dog 22 engages the ratchet wheel to normally sustain the same in any position. The reciprocating means 20 comprises a handle 78 which when oscillated causes alternate engagement with the ratchet teeth, of pawls 80, 82. The latter are selectively engageable with the ratchet teeth by operation of a cam handle 110 controlling a linkage 96, 100, 104 which is coupled to the pawls via leaf springs. The dog 22 comprises parts 86, 89 urged into engagement with the ratchet teeth by a spring 87 and the counterweight effect of lever 90, the latter being manually rotated anticlockwise for engagement of the dog 89 with a stud 92 whereupon the dog is disengaged from the ratchet. One end of the cable 40 is attached to the drum 26 by a wedge being driven together with the cable end into a recess on the drum. The wedge is driven into the recess by a ramrod pivoted to the base-plate and adjustably held in the operative position while the hand wheel is oscillated to knock the wedge against the rod. A similar operation is effected to remove the wedge. The cable is guided into a helical groove on the drum by a transverse stud 46 mounted on one end of a spring biased pivoted arm 44. Another stud 52 at the other end of the arm is received in a slot 54 which limits the pivoting of the arm and limits the number of layers of cable wound on the drum. A foot operated brake is associated with the hand wheel whereby the drum may be braked when it is unloaded by releasing the pawls 80, 82 and the sustaining dog 86, 89.
Patent GB-1129055-A (GB)
Title: Method and means for purifying sewage and like water-borne wastes
Inventor: HUISMAN PETER HENDRIK
IPC: C02F3/12
Filed: 1967-02-07
Abstract: 1,129,055. Treating sewage. SOUTH AFRICAN INVENTIONS DEVELOPMENT CORP. 7 Feb., 1967, No. 5674/67. Heading C1C. In an activated sludge process the wastes are admitted to a plant containing at least two endless channels extending alongside one another with a vertical aerating disc mounted for rotation in at least one of the channels, and a sedimentation vessel in series with the channels for receiving the total flow from at least one of the channels and for returning at least a portion of settled sludge to the channels. The connection if desired of two or more channels gives greater flexibility in treating sewage.
Patent GB-547050-A (GB)
Title: Improvements in bearings for rotary members
IPC: F16C19/12
Filed: 1941-05-02
Abstract: 547,050. Bearings. BRAITHWAITE, R. C. May 2, 1941, No. 5766. [Class 12 (i)] In an end-thrust or like bearing, a ball or spherical surface on the end of one member is seated on a ball ring resiliently supported in a cylindrical recess in the other member. Member 19 has a holder 17 with a conical or a close-fitting recess for a ball 16. The other member or frame 8 has a flanged cylindrical holder 2 for a ring 1 forming a race for balls 7. The balls rest on a flat or spherical disc 3 pressed against ring 1 by a spring 4, disc 3 having a rounded edge 23 to prevent jamming. Spring 4 has line contact with disc 3 and two-point contact with a disc 5 which is retained within the holder 2 by a spring ring 6. The holder 17 has a flange 18 which engages ring 1 on large movements of disc 3. The axis of the bearing may be vertical or horizontal.
Patent GB-729604-A (GB)
Title: Improvements in the production of protectively coated metals
IPC: B05D3/02
Filed: 1953-03-03
Abstract: In a process for forming a protective coating on metal as in the parent Specification, the coated metal is maintained at a temperature below 680 DEG  F. until the pyrogenic polymer has been formed, and the carbonization step is carried out at a temperature in excess of 680 DEG  F., e.g. between 800 DEG  F. and 900 DEG  F.
Patent GB-394759-A (GB)
Title: An improved children's playing tent
IPC: E04H15/00
Filed: 1932-02-27
Abstract: 394,759. Tents. ROBINSON, W. W., Ardencraig, South Bank Road, Grassendale, Liverpool. Feb. 27, 1932, No. 5889. [Class 20 (i).] A children's playing tent comprises a lower collapsable frame consisting of uprights 1, Fig. 2, braced by rigid upper horizontal members 2 and collapsable members 4, and a roof portion consisting of hinged radial arms 10 covered by and secured to a textile covering 10x, the arms being secured to the uprights in a readily detachable manner. Further, the lower frame is covered by a flexible sheet 14 which is secured to the members 2 and extends either outside, or both inside and outside the frame. In the form shown, the tent has four sides three of which are braced by the members 2 which have downturned ends 17 engaging in slotted brackets 3 secured to the uprights. These three sides are also braced by the members 4 comprising collapsable sections which are pivoted together and' to the uprights by pins 4xx, 4x, respectively. The fourth side is braced only by a bar 5 which carries brackets 7 and roller 8 for a roll-up textile sheet 9 constituting the front wall of the tent. The roof members 10, Fig. 4, are hinged to an upper central plate and are secured to the uprights by slotted hinged flaps 13 which engage over eyelets 12 where they are held by spring clips 18. The sides and back wall of the tent consist of a double thickness of textile material secured to and embracing the members 2. Angle brackets may be fixed to the lower extremities of the uprights whereby the tent may be anchored by pegs or the like.