baber/WOPTO huggingface dataset:
Patent GB-783564-A (GB)
Title: Process for the production of cross-linked diisocyanate-modified polyesters of high molecular weight
IPC: C08G18/12
Filed: 1955-05-25
Abstract: The intermediates of the parent Specification obtained by reacting a polyester, a glycol and a diisocyanate in proportions to give a product containing hydroxy groups, are mixed, for the purpose of curing, with a urethdione diisocyanate of the formula <FORM:0783564/IV (a)/1> in which R is an aromatic hydrocarbon radical.  The diisocyanate should be in a quantity in excess of that equivalent to the free hydroxy groups.  The resulting compositions are stable for up to four weeks and may be moulded and cross-linked by heating at 150 DEG  C. for 30 minutes with an after cure of 20 hours at 100 DEG  C.  In examples intermediates from p-phenylene diisocyanate, quinitol and (1) an adipic acid-glycol polyester; (2) an adipic acid, ethylene glycol and 1,2-propylene glycol copolyester; and (3) an adipic acid-diethylene glycol polyester are mixed with excess of (1) the diisocyanate <FORM:0783564/IV (a)/2> (2) the diisocyanate <FORM:0783564/IV (a)/3> and (3) the diisocyanate <FORM:0783564/IV (a)/4> moulded and cured as above described. Physical properties are given for the cured products.
Patent GB-150836-A (GB)
Title: Improvements in and relating to processes of making nitric acid
IPC: C01B21/26
Filed: 1919-06-17
Abstract: 150,836. British Thomson - Houston Co., (General Electric Co.). June 17, 1919. Nitric acid. - Oxides of nitrogen are absorbed in nitric acid with a concentration from 60 to 70 per cent, and cooled to a low temperature, namely, in the region of -40‹ C.; and free nitrogen and hydrogen collected as byproducts at certain stages in the process are combined to give the liquid ammonia used to cool the absorption chamber. Fig. 1 shows apparatus in which oxides cf nitrogen are produced by the catalytic oxidation of ammonia in the reaction chamber 1, and are conveyed to the absorption column 3, which is provided with a jacket containing liquid ammonia, and is packed with acid-resisting material such as coke. Rapid evaporation is effected by the exhaustion apparatus 18, and the resulting gaseous ammonia is supplied to the oxidizer 1. Nitric acid is allowed to percolate down the column from the nozzle 27. Unabsorbed gases pass on to a " scrubber " 11, which may consist of a tower, packed with coke, and supplied with a downward stream of water. The solution of the oxides of nitrogen in nitric acid then passes to the heat interchanger 29, through pipes 31 to the electrolyzing-cell 30, at the anode of which the oxides of nitrogen are oxidized to nitric acid. Hydrogen is liberated at the cathode, which is separated from the anode by the partition 36, and with the nitrogen passing from the scrubber 11 is used to from ammonia. Periodically, nitric acid is withdrawn from the cell 30, and replaced by water, and by means of the pump 33, nitric acid is supplied to the tower 3 passing through the heat interchanger 29 on its way, and thereby warming the cold nitric acid solution of the oxides of nitrogen coming from the absorption tower. In a modified system, the absorber, Fig. 2, consists of a chamber in which a number of disks 58 dip into a series of compartments 57 kept just filled to overflowing with nitric acid supplied by the conduit 25 from the electrolyzing-cell. The acid thus passes in the opposite direction to the flow of gases from the oxidiser, and is cooled as before with liquid ammonia. The gases coming from the oxidizer may be shunted to a condenser in order to reduce the water content before entering the absorption chamber.
Patent GB-1166400-A (GB)
Title: Windshield Wiper Apparatus
IPC: B60S1/40
Filed: 1967-04-03
Abstract: 1,166,400. Windscreen wipers. ANDERSON CO. 3 April, 1967 [10 May, 1966], No. 15231/67. Heading A4F. A windscreen wiper which is arranged to be oscillatably driven on a shaft 29 (Fig. 2) is provided with a blade assembly 22 carried by a wiper arm 21 in such a way that during use it is caused to rotate relative to the wiper arm 21 by a reciprocating link 33 which drives a rod 32 having an arcuate end portion 47, the arcuate end portion 47 engaging an element 41 which is attached to the blade assembly and which is rotated by movement of the rod 32. The wiper blade assembly which may comprise a main yoke 24 and auxiliary yokes 25 which grip a wiping element 23 is supported by a flat portion 48 of the rotatable element 41, an annular portion 45 of the element being rotatably supported in the wiper arm 21 and being provided with diametrically opposed apertures 46 which engage the arcuate end portion of the rod 32. The link 33 which reciprocates the rod 32 during operation of the windscreen wiper is pivotally secured to a pin 36 (Fig. 2) on a cowling 35 adjacent to the drive shaft 29. The element 41 may be of plastics material and may alternatively be provided with a blade assembly gripping portion extending axially of the annular portion (Fig. 13, not shown).
Patent GB-175929-A (GB)
Title: Improvements in or relating to screw-down valves
IPC: F16K1/50
Filed: 1921-06-01
Abstract: 175,929. Ross, A. June 1, 1921. Piston valves.-A valve of the kind described in Specification 16764/12 is modified by connecting the lower end of the spindle directly to the valve, which is also provided with means for preventing its rotation with the spindle and with means for preventing access of pressure fluid to the stuffing-box when the valve is open. A sliding piston valve F is provided with a curved passage for connecting the parts C, D, and with a facing F<2> which effects an additional closure when the valve is screwed down. The operating- spindle G is formed with a head G<4>, which engages in a slot F<7> in the top of the valve. To prevent rotation of the valve F, a pin J engages with a longitudinal slot F<1> in the valve. The upper end F
 of the valve is formed of the same shape as the cover of the casing, as shown, so that access of pressure fluid to the stuffing-box E<1> is prevented when the valve is open. Specifications 24010/09 and 19603/12 also are referred to.
Patent GB-735210-A (GB)
Title: Improvements relating to light fittings
IPC: F21V17/20
Filed: 1953-06-01
Abstract: 735,210. Lighting fittings. BRUNE, H. June 1, 1953, No. 15273/53. Classes 75 (2) and 75(3). A lighting fitting for supporting shades, reflectors or globes close against a ceiling or wall comprises a base 3 which is adapted to be fixed to the ceiling and to support a lampholder 6 and which is provided with an internal screw-thread 12 for engagement with a screwthread on a shade and with an external screwthread 11 for engagement with an internallythreaded plate 13 carrying an outer shade 1 or for engagement with an outer shade directly. The plate 13 shown in Fig. 2 has at least two projections 15 and the outer shade 1 has at least one aperture 19 in its rim allowing the rim to be passed upwardly over the projections. The shade is then rotated and the rim of the shade is held in contact with a flange on the plate by springs 16 mounted on the projections 15. The shade is locked in position by a further spring 17 which is riveted to the plate and which engages in an aperture 16a in the plate and in one of the apertures 19 of the shade. The lamp-holder 6 projects through an aperture in the base 3 and a flange 9 on the holder is held in abutment with the edge of the aperture by a nut 7 screwed on to the holder. The plate 13 shown in Fig. 7 has two projections 15 which engage in apertures in the shade and two levers 21 are pivoted to the projections. The plate is screwed on to the base 3 by rotating the shade and the levers are rocked by engagement of their inner ends with the base so that their outer ends engage under the edge of the shade.
Patent GB-291447-A (GB)
Title: Improvements in and relating to registering apparatus
IPC: G01P13/02
Filed: 1928-05-24
Abstract: 291,447. Idrac, J. M. P. June 1, 1927, [Convention date]. Recording by coordinates; recording by distinctive marks.-Apparatus for recording the direction, speed, and if desired temperature, of submarine currents comprises a vertical casing a containing photographic recording means and a compass fitted beneath with a casing supporting revolving vanes b the spindle of which drives by worm gear a wheel b<2> with a moving contact l<1> adapted to wipe a fixed contact l<2>. The contacts l<1>, b<2> are in circuit with a battery i and lamp k which illuminates intermittently proportionally to the speed of flow a white portion of a plate j placed at one side of the dial of a compass j, the image of the plate being thrown by an objective e<2> across a slit e<6> to record spaced marks on a time driven record drum e<4>. A continuously lit lamp h gives a record of the position of its cardinal points which are marked on the compass dial by radial strokes, one for east, two for south, and so on. The axis of the objective e<2> is appropriately oriented in the casing. A measuring scale is provided to read the records. Temperature may be recorded by a style from a bimetallic thermometer on a separate time drum or the record may be photographed on the drum e<4>. The vane chamber is closed by a dihedral perforated wall c<1> at the front and a perforated wall c<2> at the rear. The casing a is steadied by a collar d with a projecting arm d<1> ending in a length of trailing cord.
Patent GB-146706-A (GB)
Title: Improvements in pneumatic hammers
IPC: B25D9/18
Filed: 1919-06-18
Abstract: 146,706. Howard Pneumatic Engineering Co., and Bird, P. C. June 18, 1919. Percussive hand tools.-In a pneumatic hammer free exhaust in both strokes is provided for by the aid of a tube separate from the cylinder and serving to conduct live air to the front of the cylinder during the in-stroke and for exhaust during the out or working stroke. At the beginning of the in-stroke the rear of the cylinder is open to exhaust through the ports 25, and pressure on the rear of the valve 7 moves it to the position shown in Fig. 1 in which the groove 8 is supplied with live air through ports 28, 27, Fig. 5, and distributes by ports 15, 14 to the tube 12. As the piston moves inwards the ports 25 are closed, but exhaust continues through the ports 20, 21, 22, 23, 24, 17 and 19. Cushioning begins when the piston closes the ports 20 and the valve is moved to the position shown in Fig. 5, cutting off the groove 8 from the inlet ports 28 and uncovering the ports 26 for admission of live air to the rear of the cylinder. On the outstroke, air exhausts first through the ports 25 and second through the tube 12 and ports 14, 15, groove 8, and ports 16, 19.
Patent GB-1461104-A (GB)
Title: Traction roller transmission
IPC: F16H13/04
Filed: 1974-04-08
Abstract: 1461104 Friction gearing C E KRAUS 8 April 1974 [5 June 1973] 15389/74 Heading F2Q In a friction drive comprising a roller 18 integral with an input shaft 1, a ring 10 carried by an output shaft 2 whose axis is parallel to that of shaft 1 and rollers 12, 14, 16 located between and engaging the roller 18 and ring 10, the lines of contact between the rollers 12, 14, 16 and the ring 10 are shorter than the lines of contact between the rollers 12, 14, 16 and the roller 18. The ring 10 comprises two spaced races 28, 30 which engage the axially outer portions of the rollers 12, 14, 16 whose central portions are engaged by the roller 18.
Patent GB-454085-A (GB)
Title: Improvements in or relating to rock drills
IPC: E21B6/06
Filed: 1936-06-02
Abstract: 454,085. Percussive drills. MOSS, E. W., 75, Victoria Street, Westminster.-(Ingersoll- Rand Co. ; 15, Exchange Place, Jersey City, New Jersey, U.S.A.) June 2, 1936, No. 15426. [Class 124] The rifle nut 36 is held in the piston 24 by a screwed sleeve 44 made of aluminium or of a phenol condensation product. The threads on the inner and outer surfaces are of opposite pitch and the nut has a conical surface 47 to lock it in place against a corresponding surface on the sleeve.
Patent GB-1331302-A (GB)
Title: Magnetic tape apparatus
IPC: A61B5/336
Filed: 1970-04-01
Abstract: 1331302 Recording electro-cardiograph signals INTERMEDCRAFT CORP 1 April 1970 [1 April 1969] 15430/70 Heading G1N [Also in Divisions G5 and H3-5] Signals, particularly electro-cardiograph (EKG) signals, to be recorded on magnetic tape 30 are encoded, by an encoder 21, in the form of alternate positive and negative pulses, the ratio of the negative to positive pulse widths being proportional to the amplitude of the EKG signal; while on playback, distortions introduced by the recording/playback process are removed by a signal shaper 54, which restores the pulses before the original EKG waveform is reproduced by means of a lowpass filter 55. The waveform may be displayed 56 on an oscilloscope or chart recorder. Associated audio information may be recorded/ played back simultaneously using a second track of the tape 30. Both circuits 21, 54 include operational amplifiers 70, 80 with feedback resistors R 2 , R 4 , R 5  and capacitors C 1 , C 2 , the shaper 54 also including parallel opposing diodes D 1 , D 2  at one input. The output voltage from the circuits 21, 54 changes polarity as the voltage across the inputs of the amplifiers 70, 80 passes through zero.
Patent GB-1443877-A (GB)
Title: Catalytic dewaxing of gas oils
IPC: C10L1/04
Filed: 1974-04-08
Abstract: 1443877 Catalytic dewaxing and hydrodesulphurization of gas oils MOBIL OIL CORP 8 April 1974 [15 June 1973] 15466/74 Heading C5E Gas oil boiling in the range 400-900 F. is catalytically dewaxed using a zeolitic catalyst of the ZSM-5 family to reduce its pour point and thereafter subjected to hydrodesulphurization to reduce its sulphur and nitrogen contents. The dewaxing catalyst can contain 0À5 to 5 wt. per cent of Ni, Pt or Pd if the dewaxing is carried out in the presence of hydrogen; the catalytic dewaxing can be carried out at 300- 1000 F., 0 to 2000 p.s.i.g. hydrogen partial pressure and a LHSV of 0À1 to 10. The hydrodesulphurization can be carried out at 550- 800 F., 200-1000 p.s.i.g. hydrogen partial pressure and 0À5-4À0 LHSV using a cobaltmolybdenum-alumina catalyst.
Patent GB-597588-A (GB)
Title: Improvements in or relating to the drawing of flat glass
IPC: C03B15/06
Filed: 1945-06-19
Abstract: 597,588. Making sheet glass. SOC. ANON. DES MANUFACTURES DES GLACES ET PRODUITS CHIMIQUES DE ST.- GOBAIN, CHAUNY, & CIREY. June 19, 1945, No. 15511. Convention date, Jan. 5, 1944. [Class 56] In the vertical drawing of sheet glass, convection air currents in the zone where the sheet is still plastic (which cause an uneven surface and thickness) are suppressed by means imposing an air movement which is the same at all points along a horizontal band on each respective side of the sheet, such means comprising one or more horizontal, bladed, rotatable shafts on each side of the sheet, whose blades extend across the width of the sheet and pass close to it. Each blade may lie in a plane containing the axis of its shaft, thus imposing a vertical air movement which may be upwards or downwards (on each side of the sheet independently), according to the direction of rotation. Alternatively, as shown in Fig. 4, the blades 6 may be helical so as to impose an inclined air movement, and if the sense of the helices is the same for each shaft of a pair 8, 8a and 9, 9a, and the shafts are rotated as indicated by the arrows, horizontal circulation around the sheet 2, as at 12 (Fig. 8), will result. The size of the bladed shafts or their number may be arranged so that they are effective throughout the zone wherein the glass temperature is 700‹ C. or over ; they may be vertically adjustable and may be internally cooled so that the air conditions may be controlled by regulation of their height, their speed and the temperature of the cooling medium.
Patent GB-420356-A (GB)
Title: Improvements in three-colour photography
IPC: G03C7/46
Filed: 1934-05-25
Abstract: 420,356. Colour photography. LESSERTISSEUX, P. E. F., 1, Rue Recamier, Paris. May 25, 1934, No. 15602. Convention date, June 1, 1933. [Class 98 (ii)] In producing tricolour photographs or kinematograph films from separate monochrome component negatives by printing two of the negatives simultaneously or successively in register on opposite sides of a film coated on each side with gelatino-silver-bromide emulsion, developing and fixing the images, converting them into dye images of appropriate colour by the mordanting process, resensitizing the film with alkaline bichromate solution, drying it, exposing it in register beneath a positive made from the third component negative, washing and dyeing with the third colour the image so produced in the parts which are not hardened by the exposure, special dyestuffs are used, and are applied in one or other of two definite sequences so that they will exert no harmful action upon one another, and so that those used for toning the silver images will be unaffected by the resensitizing step. To prevent the dye solutions from wandering from one face of the film to the other, they may be thickened as with glycerine or monoacetine, and this incidentally increases their penetration into the gelatine. The two silver images are the blue positive and either the yellow or the red positive, and for dyeing them Capri Blue G.O.N. or Rhoduline Blue 5B is used for the blue, and for the other, either of the yellow dyes Thioflavine T or Acridine Yellow, or the red dye Rhodamine S. The bichromate image is printed in the blue image layer ; if it is the red positive it is dyed with ordinary Carmine in alkaline solution or Pinatype Red R, and if it is the yellow positive it is dyed with Pinatype Yellow F, Mikado Golden Yellow, or Thiazol Yellow.
Patent GB-991270-A (GB)
Title: Means of modulating a laser
IPC: H01S3/104
Filed: 1963-04-19
Abstract: 991,270. Lasers. RAYTHEON CO. April 19, 1963 [April 23, 1962], No. 15620/63. Heading H3B. A magnetic field is applied to laser so as to split the output radiation into two components in accordance with the Zeeman effect so that when the two components are passed through a plane polarized analyser a single component is produced which pulsates or fluctuates in intensity at the difference in frequencies between the two polarized components entering the analyser. As shown in Fig. 1, a heliumneon gas laser is pumped by R.F. pumping source 35 connected to electrodes 36, 37, 38, surrounding tube 30 and a variable magnetic field is applied to the gas by coil 44 wound about the tube 30 and which is connected to a modulating source 45 such as a signal generator. The helium 2 s , 2p energy levels are split as shown in Fig. 6, by the magnetic field according to the Zeeman effect, so that the output beam comprises three components f 0 , f 1 , f 2 , the latter two components corresponding to transitions between the M S=+1  and M p=0 , and M s=-1  and M p=0  levels respectively. As shown in Fig. 7, component 46 is right circularly polarized, component 48 is left circularly polarized while component 47 is linearly polarized. This latter component is non-existent when the magnetic field is parallel to the axis of tube 30. The two circularly polarized components are passed through polarized analyser 40 and emerge as a linearly polarized beam 49 whose amplitude is varying at the difference frequency between the two components 46, 48. By varying the strength of the magnetic field the frequency of the output beam can be varied, Figs. 8, 9 (not shown). The negative temperature medium may be caesium vapour. -
Patent GB-457480-A (GB)
Title: Improvements relating to chain-shifting devices of variable speed gears for cycles and the like
IPC: B62M9/124
Filed: 1935-05-30
Abstract: 457,480. Variable-speed chain gearing. CYCLO GEAR CO., Ltd., and CAMILLIS, L., Potters Hill, Aston, Birmingham. May 30, 1935, No. 15696. [Class 80 (ii)] [See also Group XXXI] In variable-speed driving-mechanism for cycles &c. of the type comprising a multiple sprocket 3, 4, 5 and a chain 6<1>, which is shifted laterally by means of a jockey sprocket 6 slidably mounted on a shaft 10 and is maintained taut by a spring-controlled tensioning-arm 9 pivoted on the shaft 10, the chain 6<1> passes around an anti-frictionally revolving disc 8 on the tension arm 9 and through a guiding eye or loop 18 extending beyond the periphery of the disc. The loop 18, Fig. 2, is substantially U-shaped, and its inner faces are of convex contour so as to reduce friction with the side links 25 of the chain, only the rollers 26 of the chain contacting with the periphery of the disc 8. The loop 18 is mounted on a stub axle 16 carrying the disc 8, and is angularly adjustable by means of a set-screw 23 and a nut 20.
Patent GB-741892-A (GB)
Title: Method of and apparatus for the production of ball-bearing races and similar parts
IPC: B21K1/04
Filed: 1953-06-08
Abstract: 741,892. Making race rings for ball-bearings. HATEBUR, F. B. June 8, 1953 [June 9, 1952], No. 15768/53. Classes 83 (2) and 83 (4). Forging; shearing.-A method of making ball-bearing races and the like comprises forming by pressing an intermediate workpiece 25, Fig. 4, having two partly telescoped parts 251, 25<SP>11</SP> cohering along a circumferential surface W, and then separating the parts along the surface W so as to form two races. A steel rod 1, Fig. 3, is heated in an induction heating coil 2, Fig. 1, is gripped in a chuck 3, Fig. 3, and a length 4 is sheared therefrom by a tool 6. The latter has a claw 7 which grips the blank 4 and conveys it to a die 8. A press platen 10 then moves toward the die, whereby a spring- loaded plunger 12 pushes the blank 4 out of the claw and into the die 8 where it is upset by a tool 11 to form a circular disc 13. The latter is then ejected by a pin 14, is gripped by a pair of mechanically-operated tongs 16, 17, Fig. 1, and conveyed to another die 18 in which it is pressed by a plunger 19 and sleeves 20, 21 to form the workpiece 25. The latter is then ejected by pins 27, 28 and a sleeve 23, is gripped by tongs 29, 30 and conveyed to a third die 31 within which it is sheared into separate races 25<SP>1</SP>, 25<SP>11</SP> by a hollow punch 32, and the disc 37, Fig. 4, is removed by a stationary pin 36, which enters the hollow punch. The waste disc is ejected through the hollow punch. The races are ejected by an ejection plunger 49 which acts through an ejector 50 pins 55 and a sleeve 35, to remove the smaller race, and through a spring 51, sleeve 53, pins 52 and sleeve 33 to remove the larger race; the larger race is removed first. The races drop into a shoot which delivers them to channels 44, 45 leading to rolling devices where the races are hot-rolled to accurate dimensions and are subsequently hardened and ground. Several rolling devices may be provided to deal with the output from the press.
Patent GB-555972-A (GB)
Title: Variable speed hydraulic transmission systems
IPC: F16H61/40
Filed: 1941-12-08
Abstract: 555,972. Rotary engines; hydraulic transmission of power. HAYES ENGINEERING CO., Ltd., and MITCHELL, R. J. Dec. 8, 1941, No. 15842. [Class 69 (ii)] [Also in Group XXVI] A hydraulic variable speed gear especially appliable for driving metal drilling and like machines comprises a gear pump element having a central gear 6A on a driving-shaft 22 and cooperating pump elements 5A, 7A supplied from a reservoir 23 by pipes 24, 25 respectively. The pressure fluid produced may pass to outlet pipes 27, 28 when the device acts as two gear pumps delivering in parallel, or by closing a valve 15A the outlet passes only to the pipe 27. The pressure fluid can be passed to either of two motor gear units similar to the pump unit 6A, 5A, 7A and valves 30, 31 control the flow of fluid in such a way that either of the motor units may act as the driven unit and each unit may receive two pressure streams or so as to cause all three gears of a unit to be in operation, or each unit may receive only one stream so that only one pair of gears act to effect the drive. The two driven shafts 29, 35 are connected by an Oldham coupling 34, and universal joints 37 connect to a bevel wheel 40 geared to the ultimate output shaft 38. The gear pump 6A, 5A, 7A may be replaced by a pump of another kind but in this case the motor is constructed and controlled in the same manner as the gear pump described.