baber/WOPTO huggingface dataset:
Patent GB-871940-A (GB)
Title: A stabilizer of the effective value of an alternating current
IPC: G05F3/04
Filed: 1959-04-17
Abstract: 871,940. Automatic regulators. TESLA NARODNI PODNIK. April 17, 1959 [April 18, 1958], No. 13160/59. Class 38 (4). In an automatic regulator for the effective value of an alternating current, a primary winding 11 of a transformer 10 is connected to the supply through a resistor 14 and a secondary winding 13 supplies a current of instantaneous value i 3  to a load 16. A secondary winding 12 of the transformer supplies, through a gasfilled stabilizing valve 15, a current of instantaneous value i 2  to the load in a direction opposing that of current i 3 , for that portion of the secondary voltage cycle during which the instantaneous voltage of the secondary winding 12 exceeds the striking voltage of the valve 15. With a reduction in the supply voltage the consequent fall in the current i 3  is compensated by a fall in the current i 2  such as to stabilize the effective value of the current through the load. In a modification, the current i 3  is adjusted by a rheostat and the degree of compensation is adjusted by a potentiometer across the load, the stabilizing valve being connected to the slider of the potentiometer.
Patent GB-1392788-A (GB)
Title: Clutch disc
IPC: F16D13/64
Filed: 1973-03-20
Abstract: 1392788 Resilient couplings DAIKIN SEISAKUSHO KK 20 March 1973 [31 March 1972] 13213/73 Heading F2U Collars 25 suitably hardened by heat treatment space apart a clutch plate 16 and a retaining plate 17 which are held together by rivets 26, the plates 16 and 17 being one each side of a flange 15 of a splined hub 13, to which the plates are connected by springs 21 and a friction damper comprising friction rings 23, 24 and a spring 24 acting between the flange and the two plates, the collars passing through holes 22a, 23a and 24a in the rings 22, 23 and spring 24 and through elongated holes 15b in the flange 15.
Patent GB-294321-A (GB)
Title: An improved switch and bank for automatic telephone exchanges
IPC: H01H67/12
Filed: 1928-02-17
Abstract: 294,321. Lowe, J. P. Feb. 17, 1928. Automatic and semi-automatic exchange selectors.-In a selector the wipers of which are moved in two linear directions at right angles to one another by means of racks which are engaged in turn by a double gearwheel, the wipers engage horizontal bare wire multiples, mounted so as to prevent overhearing, at right angles to the plane of motion of the wipers. The wiper carriage comprising a rack 9 is vertically movable on a carriage 8 which is horizontally movable on bars 2 on the back-plate 1, and comprises a horizontal rack 18. A ratchet-wheel 16 operated through a pawl 17 by a stepping magnet 24, is fixed to a shaft 15 on which is slidably splined a double gear-wheel 14. A spring 22 on the shaft normally presses one part of the wheel 14 into engagement with the rack 19 so that the first set of impulses to magnet 24 raise the wipers. A magnet 31 is then energized so that its armatures 33, which carries a fork embracing the hub of wheel 14, shifts the latter against its spring into engagement with the rack 18 so that the second set of impulses shifts the wipers horizontally into the multiple bank. When the subscriber hangs up, a release magnet 26 raises a triple-detent release 27. The trigger 30 raises pawl 17 to prevent the ratchet holding the racks off-normal; the trigger 29 withdraws a detent 19 from rack 18 to allow the latter to return to normal under the influence of a clock-spring 20, attached thereto, and during the return, the trigger 28 trips the detent 10 of the rack 9 to allow the wiper carriage to drop to normal, and the release magnet circuit is broken by an off-normal contact. Vertical and horizontal off-normal contacts are provided, and a contact actuated by magnet 31 to prevent rotation of wheel 14 prior to meshing with rack 18. Terminal banks. The banks, which are continuous over a set of switches, comprise three vertically-arranged sections, one per wiper, of ten levels each. The contacts are formed of bare copper wire or strip 34, Fig. 4, clamped between metal stamping 35, with sheets of thin metal gauze connected to positive pole of battery to prevent overhearing and insulating material between the contacts. Indicating position of wipers. A pointer 45, Fig. 13, slidable on a vertical guide, is raised and lowered by a forked arm 47, Fig. 2, on the wiper carriage, and protrudes through a graduated slot 48 in the right-hand side-plate of the switch. A graduated wheel 38, Fig. 10, visible through a window in the side plate, Fig. 13, is either rotated by gearing 39 from the rack 18 or is mounted on the spindle of the spring 20, to indicate the horizontal setting of the wipers.
Patent GB-987612-A (GB)
Title: Sulphite pulping process
IPC: D21C3/26
Filed: 1961-04-14
Abstract: Pulp is produced from cellulosic raw material by digesting with aqueous magnesium bisulphite solution initially having a pH of 2.5-5.0, the major portion of the digestion being carried out at a temperature of 150-200 DEG C. and a pH of 3-4, the digestion being completed by raising the pH to a value in the range 4. 75-6.5 by the addition of an aqueous suspension of magnesium hydroxide to the digesting liquor.  The pressure and temperature are preferably increased during completion of the digestion.  The residual liquor may be concentrated by evaporation and burnt to form sulphur dioxide and magnesium oxide from which magnesium bisulphate is reconstituted and recycled to the process (Fig. 1, not shown).
Patent GB-1028407-A (GB)
Title: Improvements in or relating to morphinan derivatives and their preparation
IPC: C07D221/28
Filed: 1963-04-04
Abstract: Compounds of the Formula I are prepared by reacting a compound of the Formula II with an acylating agent to produce a compound of the Formula III, which is reduced with an alkali metal hydride complex in an inert solvent medium:  <FORM:1028407/C2/1> <FORM:1028407/C2/2> <FORM:1028407/C2/3> where R represents an alkyl group of not more than five carbon atoms, R1 represents a hydrogen atom or an aryloxy group, R11 represents a methylene group, a carbonyl group or a ketalated carbonyl group, X represents a hydrogen atom or a hydroxyl group and X1 represents a hydrogen atom or a hydroxyl or acyloxy group.  (-) - 3 - Methoxy - 6 - oxo - 14 - hydroxy - N-ethylmorphinan(cis) is prepared by deketalation of (-) - 3 - methoxy - 6,6 - ethylenedioxy - 14 - hydroxy - N - ethylmorphinan(cis).  (-) - 3 - Methoxy - 6,6 - ethylenedioxy - 14 - hydroxy - N - acetylmorphinan(cis) is prepared by ketalation of the corresponding 6-keto compound.  (-) - 3 - Methoxy - 6,6 - ethylenedioxy - 14 - hydroxy - N - methylmorphinan(cis) is prepared by ketalation of (-)-3-methoxy-4-phenoxy-6-keto - 14 - hydroxy - N - methylmorphinan (cis) to give (-) - 3 - methoxy - 4 - phenoxy - 6,6 - ethylenedioxy - 14 - hydroxy - N - methylmorphinan(cis) which is then treated with metallic sodium in liquid ammonia. (+)-3-Methoxy-morphinan(cis) is prepared from (+) - 3 - methoxy - 4 - phenyloxy - morphinan(cis) by treatment with sodium in liquid ammonia.
Patent GB-1378616-A (GB)
Title: Vacuum cassette for x-ray films
IPC: G21K4/00
Filed: 1973-03-21
Abstract: 1378616 X-ray cassettes A SCHMITZER 21 March 1973 [25 March 1972] 13523/73 Heading H5R A vacuum cassette for holding an X-ray film 7 between two intensifier foils 5 and 6 comprises a pair of substantially planar housing plates 1, 2 and a sealing strip 3 attached along the periphery of one of the plates so that when the plates are disposed together an air-tight enclosure is formed and when air is withdrawn from the enclosure the external atmospheric pressure causes the plates 1, 2 to press the intensifier foils and the film closely together. To prevent the plates 1, 2 bowing if the sealing strip 3 is thicker than the foils and the film, a resilient band 14 is provided around a central portion of one plate. In Fig. 3 the strip 3 is fixed to plate 2 between a corrugation 10 and a lip 12, and plate 1 has a sealing bead 11. In Fig. 2 (not shown), the strip 3 is fixed to plate 1 and plate 2 is entirely planar, the strip 3 having a grooved sealing face contacting plate 2.
Patent GB-143396-A (GB)
Title: Improvements in and relating to dining and other tables
IPC: A47B1/05
Filed: 1919-05-29
Abstract: 143,396. Rutherford, J. F. May 29, 1919. Expanding-tables.-To enable the end leaves of extension tables to be readily slid under the central part of the top, means are provided to raise this central part by moving the extension leaves outwards a short distance beyond their normal extended positions. The end leaves e are carried by sliding rails h, which may be geared together bv racks j and pinions l. The central part c of the table top is raised by pivoted arms f operated by projections i on the sliding rails h.
Patent GB-227355-A (GB)
Title: Improvements in rockets
IPC: F42B4/30
Filed: 1924-06-04
Abstract: 227,355. Butt, R. M., and Brock, A. June 4, 1924. Pyrotechnic d'evices.-To facilitate the charging of rockets, the propelling composition is made plastic bv the addition of water, starch or flour paste, oil, or blacklead. In one method of charging, the plastic composition is inserted in a forming tube and a plunger carrying a spindle is pressed into it to consolidate the charge and push it out. The moulded composition is allowed to dry and a case is formed on it, or it may be pressed into a case brought into alignment with the tool. In small rockets, the chokemay be omitted. In a second' method, the composition is made into a paste and a spindle is repeatedly dipped into it until a charge of the required thickness is formed. The charge is then drawn off the spindle, and a case is rolled on. An alternative method of forming the case is to dip the formed charge into a paste of plaster of Paris and thin glue.
Patent GB-1388075-A (GB)
Title: Water insoluble azo dyes
IPC: C09B29/08
Filed: 1973-03-21
Abstract: 1388075 Aniline derivative NIPPON KAYAKU KK 21 March 1973 [12 April 1972] 13630/73 Heading C2C [Also in Division C4] m-Acetylamino-N-cyanoethylaniline is prepared from acrylonitrile and m-acetylaminoaniline.
Patent GB-144084-A (GB)
Title: Improvements in methods of heating sulphite and like digesters
IPC: D21C3/22
Filed: 1919-05-29
Abstract: 144,084. Ruths, J. K., and Aktiebolaget Vaporackumulator. May 29, 1919. Drawings to Specification. Pulp, preparation of.-To shorten the period of digesting for example in cellulose-sulphite manufacture, the preliminary steaming and the beginning of the digesting proper is done by steam drawn from a steam accumulator, the completion of the operation being effected by steam of higher pressure.
Patent GB-378420-A (GB)
Title: Improvements in or relating to change-speed and reversing gearing
IPC: F16H57/02
Filed: 1931-05-08
Abstract: 378,420. Change-speed gearing. LJUNGSTRÍM, B., 83, Linhegatan, Stockholm. May 8, 1931, No. 13681. Convention date, March 19. [Class 80 (ii).] Relates to means for supporting the idle reversing pinion 28, Figs. 1 and 2, in changespeed and reversing gearing between parallel driving and driven shafts 11, 17. One end of the shaft 11 is supported in the central hollow A, Figs. 9 and 10, in a bearing block 14 which, in assembling, is moved into a seating 30, Fig. 4, in a gear casing 1 in a direction radially of the shaft 11 and secured there by set-screws 32, Fig. 2, passing through holes 32<1>, Fig. 4, in the casing into screwed recesses 32<2>, Fig. 10, in the bearing block. The idler 28 is supported on a ball bearing 27, Fig. 1, on a through pin 26, supported at both ends in holes 26<1>, Fig. 9, in the bearing block 14.
Patent GB-253883-A (GB)
Title: Improvements in or relating to fluid meters
IPC: G01F3/18
Filed: 1926-05-31
Abstract: 253,883. Steinmann, H. June 17, 1925, [Convention date]. Crossheads.-In meters with twin pistons actuating a common crank-shaft, each piston-rod 8 is provided with a packing-piston 40 in place of a stuffing-box. The piston 40 is directly connected to the connecting-rod 43. Separate cross- 42 release the piston 40 of lateral forces.
Patent GB-423287-A (GB)
Title: A method for the production of acyl octahydrofollicle hormones
IPC: C07J75/00
Filed: 1934-05-07
Abstract: Acyl octahydrofollicle hormones are obtained by treating the acyl derivatives of the isomeric dihydrofollicle hormones with hydrogen in the presence of catalysts, whereby six further atoms of hydrogen are taken up by each molecule.  The starting materials may be obtained by hydrogenation of the acyl derivatives of the follicle hormone. According to Examples--(1) monobenzoyl dihydrofollicle hormone in alcoholic solution is hydrogenated at 140 DEG  C. under 100 atmospheres pressure in presence of a catalyst obtained by reducing a mixture of nickel oxide and copper oxide; (2) diacetyl dihydrofollicle hormone is hydrogenated at 180 DEG  C. and 100 atmospheres in the presence of cyclohexanol and a nickel chromium catalyst; (3) mono-acetyl dihydrofollicle hormone in glacial acetic acid is hydrogenated at ordinary temperature and pressure in the presence of platinum oxide catalyst.  The compounds obtained have a physiological effect similar to that of male sex hormone.  The benzoyl derivative may be saponified to yield the octahydrofollicle hormone (C18H30O2).  The Specification as open to inspection under Sect. 91 refers also to hydrogenation by other known methods (not further specified). This subject-matter does not appear in the Specification as accepted.ALSO:Acyl octahydrofollicle hormones are obtained by treating the acyl derivatives of the isomeric dihydrofollicle hormones with hydrogen in the presence of catalysts, whereby six further atoms of hydrogen are taken up by each molecule. The starting materials may be obtained by hydrogenation of the acyl derivatives of the follicle hormone as described in Specification 427,436.  According to examples: (1) monobenzoyl dihydrofollicle hormone in alcoholic solution is hydrogenated at 140 DEG  C. under 100 atmospheres pressure in presence of a catalyst obtained by reducing a mixture of nickel oxide and copper oxide; (2) diacetyl dihydrofollicle hormone is hydrogenated at 180 DEG  C. and 100 atmospheres in the presence of cyclohexanol and a nickel chromium catalyst; (3) monoacetyl dihydrofollicle hormone in glacial acetic acid is hydrogenated at ordinary temperature and pressure in the presence of platinum oxide catalyst.  The compounds obtained have a physiological effect similar to that of male sex hormone.  The benzoyl derivative may be saponified to yield the octahydrofollicle hormone (C18H30O2).  The Specification as open to inspection under Sect. 91 refers also to hydrogenation by other known methods (not further specified). This subject-matter does not appear in the Specification as accepted.
Patent GB-542453-A (GB)
Title: Improvements in servomotor control valves
IPC: F16K11/04
Filed: 1940-09-04
Abstract: 542,453. Fluid-pressure brakes. JOHNSON, M. E. Sept. 4, 1940, No. 13848. Addition to 450,697. [Class 103 (i)] In a control valve for servomotor brake mechanism according to the parent Specification, the valve piston that controls the port connected to the source of power, is provided with a deformable packing member serving to prevent leakage between the source of power and the servomotor in the closed position of the valve and between the servomotor and the atmosphere in the open position. The valve, slidable in a casing p, comprises a piston a<SP>2</SP> a tapered part b and a washer e of hard rubber or synthetic rubber secured by a screw d and a washer h on a boss c. The washer normally seats at f on the casing to close the communication of between the ports g, l of the servomotor and the source of power. The washer h serves to restrict the initial opening of this communication and by tightening the screw d, the washer e can be expanded in diameter to fit more or less tightly the casing part j when it enters this part in the operating of the valve after the communication between the servo-motor and atmosphere ports g, l has been initially restricted by the tapered part b. The valve may be operated as described in the parent Specification by hydraulic pressure acting through a pipe o on a piston s provided with a cup-leather s<SP>2</SP> and an expanding washer s<SP>3</SP> or it may be inserted in a divided pull or push rod one part of which is substituted for the pipe o while the other is secured to the valve at a<SP>1</SP> or to the casing at p<SP>1</SP>.
Patent GB-1016973-A (GB)
Title: An improved press for forming collars,cuffs and the like for wear
Inventor: STURGES NIGEL
IPC: D06F71/24
Filed: 1963-04-08
Abstract: 1,016,973. Ironing presses. SEWPRIMA Ltd. April 3, 1964 [April 8, 1963], No. 13848/63. Heading D1A. A press for forming collars, cuffs and the like comprises a movable block 5 faced with resilient material, a heated stationary block 4, a former for reception of the collar cuff or the like and means for guiding the former to a position between the blocks. As shown, block 4 comprises a hollow metal casing containing an electric heating element 7. Block 5 is faced with a layer of resilient material 10, e.g. natural or synthetic rubber or polyurethane and is moved by a ram 6 mounted in a sheet metal casing 11. There may be two blocks 5 associated with two formers 13 each secured to a carriage 15 having two slidable shafts 16. When carriage 15 is pushed inwardly a switch is closed which controls a compressor connected to ram 6 so that the latter is raised. A pressure regulator in the compressor circuit is connected to two timers corresponding to blocks 5, each having a bleed valve control 37.
Patent GB-960177-A (GB)
Title: Speed regulation circuits for electric motors
IPC: H02P5/00
Filed: 1962-04-10
Abstract: 960,177. Automatic speed control. SOC.ANON. DES ATELIERS DE SECHERON. April 10, 1962 [June 22, 1961], No. 13859/62. Heading G3R. An automatic speed control system for a train comprises a differential amplifier 1 whose output voltage Dv is proportional to the difference between reference signal Uvo and actual speed signal Uv. The error signal Dv is supplied to non-linear circuit element 2 in series with summation amplifier 6 and an integrator 3. The signal Dv is also supplied to a non-linear circuit element 4 in series with a differentiator 5, and a non-linear circuit element 7. A control device 8 for the traction motors is connected to the output of the integrator 3, the elements 4, 5, being in parallel with the element 2. The output current signal Ev of the element 2 is constant and negative for negative values of voltage Dv, is zero for small positive values of Dv, then increases positively, and is finally constant. The element 4 produces an output voltage Dvs which is zero for negative values of voltage Dv, and has a positive constant value for values of Dv above a low positive value, such as 5% of the maximum. The differentiator 5 produces current Ea proportional to the rate of change of voltage Dvs, whilst the characteristic of the element 7 is such that, for an increasing positive value of Ea, output voltage Eh is zero at first and then increases rapidly to a constant positive value, and for a decreasing positive value of Ea, the constant output voltage is maintained until Ea approaches zero, whereupon the output voltage drops quickly to zero. For negative values of Ea the characteristic is similar. The amplifier 6 produces a signal E representing the sum of signals Ev, Ea, and Eh, the integrator 3 forming the integral Ei of the signal E, the device 8 regulating the supply voltage U of the traction motors so that it is substantially proportional to the signal Ei. Initially, the reference voltage has a maximum value whilst the feed-back voltage is zero, and the error voltage has a high positive value. Signals Ev, Dvs, reach their saturation values, the derivative Ea being zero at this time whereby the signal E equals the signal Ev and the motors accelerate. The signal Ev becomes zero at a predetermined speed, and, between this value of the speed and the desired maximum value, the circuit in parallel with element 2 predominates. A pronounced variation of signal Dvs for relatively small changes of signal Dv is produced, the derivative Ea and the signal Eh being negative. The high negative value of signal E is maintained until the driving torque becomes substantially equal to the load torque, the voltage applied to the motors decreasing rapidly during this stage of the regulation. After the signal Eh reaches zero, the decrease of motor voltage continues more slowly until the signal Ea becomes zero, whereupon a stabilized speed is obtained. Thereafter, if the load is varied, an accelerating or decelerating torque is provided to reestablish the balance between the driving and load torques.
Patent GB-1361590-A (GB)
Title: Air- or mixture-distributing device for the induction system  of an internal combustion engine
IPC: F02M35/10
Filed: 1973-03-22
Abstract: 1361590 Induction passages DAIMLERBENZ A G 22 March 1973 [24 March 1972] 13899/73 Heading F1B An air or mixture distributing device, disposable between a throttle valve section and induction passages leading to individual cylinders comprises a housing composed of two shells 11, 12, Fig. 1, of a plastics material e.g. a glassfibre reinforced polyamide. Flanges 14, 13 having respectively a bead and a groove are secured by an adhesive. The throttle valve section (not shown) is secured by screws to flange 19. Lugs 22, having moulded-in screw threaded bushes, provide for attachment of a casting comprising four induction passages engaging connections 21. Lugs 24, Fig. 2, 25, 26 are for suction pipe connections e.g. for a brake installation or electronic control device. Distance pieces 31 are glued into lugs 33.
Patent GB-1421577-A (GB)
Title: Continuously operating evaporation drystallisation apparatus
Inventor: WINDAL G
IPC: B01D9/00
Filed: 1973-03-22
Abstract: 1421577 Evaporative crystallisation SOC FIVES LILLE-CAIL 22 March 1973 [29 March 1972] 13939/73 Heading BIG Apparatus for crystallizing by evaporation and which includes regulating the supply of sub-saturated solution and also washing the inner walls of the apparatus with this solution comprises a vertically disposed cylindrical tank in which the lower portion of the tank is divided into a plurality of compartments by radial partitions and wherein successive compartments communicate with each other by apertures formed in the partitions except for the outlet compartment and that one situated immediately after it and a device for supplying sub-saturated solution comprising a pipe with a plurality of holes spaced along the pipe from which is projected the solution, means for rotating the pipe about a vertical axis above the partitions and shutter means associated with the partitions to regulate the cross-sectional opening at the top of each compartment whereby the rate of flow of subsaturated solution into each compartment is regulated. Preferably the shutters are mounted so as to be capable of pivoting on the upper edge of the partitions. Figures 1 and 3 show respectively a vertical section of a crystallisation apparatus and a digrammatic view of the radial partitions and shutters wherein tank 10 is divided into eight compartments by partitions 15 which contain apertures 28 except in compartments 0 and 7. In compartment 0 the solution is concentrated by heater 30, until saturated, whilst from 7 the desired crystalline material is recovered from a conduit (not shown). The jet pipe 32 is rotated by a geared motor (not shown) and distributes the unsaturated solution successively into all the compartments, the distribution into each compartment being regulated by movable shutters 18 pivoting on axis 20.