baber/WOPTO huggingface dataset:
Patent GB-842110-A (GB)
Title: Dissipationless differential phase shifters
IPC: H01P1/18
Filed: 1957-01-04
Abstract: 842,110. Differential phase-shifters. SYLVANIA ELECTRIC PRODUCTS Inc. Jan. 4, 1957 [Feb. 28, 1956], No. 498/57. Class 40(8). A differential phase-shifter comprises two passive, symmetrical, four-terminal networks having their inputs connected in parallel to the same source, the ratios of input to output voltages when the output terminals are opencircuited (A 1  and A 2 ) attaining different values over a certain frequency range for each of the networks. When the networks are terminated by their image impedances, the phase difference of the outputs depends only upon A 1  and A 2  and is given by ## = cos-<SP>1</SP>A 1  - cos<SP>-1</SP> A 2 . For a differential phase shift of 180 degrees it is required that A 2  = A 1  and for a phase shift of 90 degrees that As = dA 1 /d# 1  where #1 is the phase shift in the network having the parameter A 1  When the networks are terminated by resistances R 1 , R 2  approximately equal to their characteristic impedances where B 1  and B 2  are the ratios of the input voltage to the output current for the two networks when the output terminals are short-circuited. For a differential phase-shift of 180 degrees, A 2  R 2  B 1 = A 1  R 1  B 2  and for a differential phase-shift of 90 degrees, A 1  A 2  R 1  R 2  = B 1  B 2 . These various relationships are satisfied by the circuit of Fig. 2 in which the first network takes the form of a section of transmission line 100 of length 3l and the second network takes the form of a # section having two short-circuited stubs of length l shunted across a transmission line and spaced apart by a distance equal to the stub length. All the sections of the circuit have the same characteristic impedance. If each network is terminated in its image impedance it can be shown that, in the interval #/ 3  < # 2  < 2#/ 3 , the approximate relationship cos # 1  #- 2 cos # or A 1 #-A 2  holds good. It is stated that a 180 degree differential phase shift is obtained when # 2  equals 60, 90 or 120 degrees. When the networks are resistively terminated in their characteristic impedances, the 180 degree phase shift is obtained for # 2  = 90 degrees. In practice, if an error of 10 degrees is permitted, a constant differential phase shift is obtained for values of # 2  between 80 and 100 degrees. The width of the useful frequency band may be increased by varying the ratio of the characteristic impedances of the series and shunt branches of the second network. In a modification, the length of the line 100 is reduced to 3/2l and the stubs of the second network are open circuited. By making the ratio of the impedance of the series branch to the impedance of the stubs equal to 0.3 and mismatching R 2  slightly, it is stated that large permissible variations in # 2  are obtainable.
Patent GB-263584-A (GB)
Title: Improvements in or relating to electric motor starters
IPC: H02K17/12
Filed: 1925-10-07
Abstract: 263,584. Igranic Electric Co., Ltd., and Bergmann, F. Oct. 7, 1925. Controllers, actuating; master control systems. -In a motor starter two electromagnetic switches S, D are caused to close in succession, the first or starting switch S immediately after manual closure of a push-button 1, and the second or running switch D immediately after re-opening of the push-button switch. The closure of the starting switch, through auxiliary contacts s', energizes the closing coil of a lineswitch A which causes the energization of the running-switch coil to take place immediately after the return of the starting-switch. The arrangement shown changes alternating current motor windings M from star to delta connection.
Patent GB-1366992-A (GB)
Title: Making ceramic bodies
IPC: C04B35/64
Filed: 1972-01-06
Abstract: 1366992 Ceramics; ferrites INTERNATIONAL BUSINESS MACHINES CORP 6 Jan 1972 [8 Feb 1971] 554/72 Heading C1J Ceramic powder of, e.g. ferrites, nitrides, carbides, silicides, is formed into a shape which is oversized but otherwise substantially that of the final body by an amount sufficient to permit the escape of gases during heating, calcined, further compacted and then sintered to form the ceramic body, Compaction can be isostatic. The ferrite specified is (Ni1-#Zn#O)1-x(Fe2O3)1+x where # = 0À68 and x = -0À001.
Patent GB-1178721-A (GB)
Title: Improvements in and relating to Novel Phenoxypropylamines
IPC: A61K/
Filed: 1967-01-04
Abstract: 1,178,721. Propanolamine derivatives. PHILIPS' GLOEILAMPENFABRIEKEN N.V. 4 Jan., 1967 [7 Jan., 1966], No. 556/67. Heading C2C. Compounds of the general formula (R 1  = C 2-5  alkenyl or alkynyl group, the double or triple bond being in conjugation with the phenyl group; R 2  = alkyl, alkenyl, alkynyl, cycloalkyl or aralkyl group containing up to 12 carbon atoms) and their salts are prepared by standard methods, e.g. by reacting the appropriate 1-phenoxy-2,3-epoxypropane and amine. The, preparation of 1-(2-propen-1-ylphenoxy)- 2,3-epoxypropane is described. The compounds of the invention are #-adrenergic blocking agents, and may be administered in the form of pharmaceutical preparations containing them together with a carrier.
Patent GB-1527931-A (GB)
Title: Directional valve
IPC: F16K31/06
Filed: 1976-01-08
Abstract: 1527931 Valves JOS SCHNEIDER & CO OPTISCHE WERKE 8 Jan 1976 [18 Feb 1975] 00618/76 Heading F2V  An electromagnetically actuated pilotcontrolled directional valve has a 4-landed symmetrical pilot spool 2 coaxial with a main spool 3, the pilot spool lands co-operating with control ports in the main spool to form control restrictor orifices, all the orifices being varied simultaneously so that the main spool is caused to follow the movement of the pilot spool. Piston actuating surfaces 28, 28<SP>1</SP> on the main spool are fed with control fluid from an inlet 22 via restrictor orifices 19, 20, annular chambers 25, 251 and inclined passageways 26, 26<SP>1</SP>. Control fluid is discharged from the control chambers 27, 27<SP>1</SP> via restrictor orifices 18, 21, control ports 15, 17 and annular return ducts 29, 29<SP>1</SP> connected to a discharge passageway 40. Leakage fluid which passes between the reduced diameter end portions 31, 31<SP>1</SP> of the main spool and metallic sealing rings 32, 32<SP>1</SP> is fed back to reservoir via slots 39, 39<SP>1</SP> in the sealing rings and restrictor orifices 36, 36<SP>1</SP>. Restrictor orifices 35, 35<SP>1</SP> in the pilot valve armatures provide a damping effect on the system. In an alternative embodiment, Fig. 2 (not shown), a single double-acting electromagnet is used instead of the two single-acting electromagnets of the first embodiment.
Patent GB-246131-A (GB)
Title: Improvements relating to containers for electrical apparatus
IPC: H01F27/14
Filed: 1926-01-08
Abstract: 246,131. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Rodman, C. J., and Styer, C. A.). Jan. 16, 1925, [Convention date]. Transformers.-In casings for oil-immersed electrical apparatus such as transformers in which provision is made for " breathing," the air drawn in to the space 3 above the oil is caused to pass through a seal 12, a container 6 filled with a moist deoxidizing agent, a valve 14, a container 7 filled with a dehydrating compound, and a seal or pressure regulating device 13. The valve 14 is adapted normally to prevent diffusion of gas from one container to the other so as to prevent the absorption of moisture from the deoxidizing agent by the dehydrating agent, and may comprise either a check valve of plate form adapted to permit " in breathing only, or a liquid seal adapted to permit both in breathing " and " out breathing " under a sufficient change of pressure in the casing 1. The dehydrating material may be calcium chloride and the deoxidizing agent may consist of copper, kieselguhr, ammonium chloride, calcium chloride, and water. Reference has been directed by the Comptroller to Specification 244,056.
Patent GB-464709-A (GB)
Title: Combined safety razor and stropping device
IPC: B26B21/50
Filed: 1936-01-08
Abstract: 464,709. Safety razors. HARROWELL, L. Jan. 8, 1936, No. 651. [Class 30] A strop may be passed between the blade holder 17, 11, 12 and a spring- pressed plate 4, so that on moving the razor to- and-fro along the strop the holder is oscillated about a pivot bar 9 and the lower sides of the cutting edges of the blade 16 are sharpened. The plate 4 is mounted on a stem 3 in which is fixed a stud 7, the ends of which move in slots in the handle 1. The end 2 of the handle carries a cross-bar 9 on which are pivoted arms 13 depending from the lower member 12 of the blade clamp. The guard is a rectangular frame comprising bars 21 and end pieces 20, which latter are pivoted at 19 on the part 11 and are formed with fingers 22 which pass between the arms 24 of springs mounted on the ends of the bar 9. In the stropping operation the blade holder oscillates about the pivot 9 and carries the bars 21 clear of the blade. When the strop is withdrawn the plate 4 is again pressed upward by a spring 5 against the holder to keep the latter rigid during shaving. The blade 16 is secured by means of a conical nut 18 which bears upon a plate 17 and works on a threaded stud 14 fixed in the part 12.
Patent GB-1350861-A (GB)
Title: Weft knitted fabric and a method of producing the same
IPC: D04B1/00
Filed: 1972-01-07
Abstract: 1350861 Knitting VYZKUMNY USTAV PLETARSKY 7 Jan 1972 [7 Jan 1971] 740/72 Heading D1K An at least partly double weft knitted fabric comprises, in the double part or parts, linking courses in which the sinker loops of one fabric ply cross in front of the needle loops of the. other fabric ply while the sinker loops of the other fabric ply are on the same side of the complete fabric. The fabrics may each be plain knitted and the wales of stitches 2 of one fabric alternate with the wales of stitches 3 of the other fabric and the sinker loops 4 of both fabrics alternate. A similar fabric may be connected by all sinker loops in alternate courses. Wales of each of two fabrics may be arranged in pairs, Fig. 5. Double parts of fabric may be connected by cross stripes of single fabric Fig. 6 (not shown) or by lengthwise and cross wise stripes.
Patent GB-534411-A (GB)
Title: Improvements in or relating to the production of yarn or roving
IPC: D02G3/18
Filed: 1940-01-12
Abstract: 534,411. Making yarns and rovings. ALGEMEENE KUNSTVEZEL MAATSCHAPPIJ, N. V. Jan. 12, 1940, No. 753. Convention date, Jan. 13, 1939. [Classes 120 (ii) and 120 (iii)] A yarn or roving is formed by directing a moving mass or stream of gas and fibres into the larger end of an open-ended hollow foraminous collector in the form of a cone or similar tapering surface of revolution rotating about its axis so that the fibres are deposited on the interior surface away from the smaller end and withdrawing the fibres through the smaller end of the collector as a twisted yarn or roving ; a cored yarn or a covered electrical conductor may be formed by feeding a core strand or a conductor through the collector along the axis thereof in the same direction as that in which the fibres are withdrawn and withdrawing the core and fibres together so that the latter are spun around the former. As shown, an artificial silicate material such as glass is drawn from a molten mass in a furnace 10 by air or gas blasts such as described in Specification 529,189, [Group XXIII], through a series of orifices 16 and directed in fibrous condition on to the interior of a foraminous conical collector 18 rotatably mounted beneath the furnace with its axis offset from the orifices 16. The rotation of the collector carries the layer of fibres towards the smaller end thereof where it is withdrawn and twisted into a yarn or roving and wound up on a bobbin 32 ; the yam passes from the collecting drum to the bobbin around a roller 38 located with the axis of the collector tangential to its periphery. If a cored yarn is to be formed the core is fed from a bobbin 40 down the axis of the collecting drum. The drum may have its axis inclined to the vertical and a steam blower of the type described in Specification 428,720, [Group XXIII], may be used instead of an air or gas blast furnace and in this case the collector may be surrounded with a vacuum chamber to remove the steam. Specification 505,784 also is referred to.
Patent GB-624027-A (GB)
Title: Improvements in or relating to dyestuffs and to the sensitising of photographic emulsions therewith
IPC: C09B23/01
Filed: 1947-01-09
Abstract: b -Benzlepidine ethiodide is prepared by reacting together b -acetylethyl alcohol, b -naphthylamine and b -naphthylamine hydrochloride.  2 - Thio - 3 - ethyl - 4 - keto - 5 - di - (benzylthio)-methylenetetrahydrothiazole is prepared by reacting together N-ethylrhodanine and metallic sodium dissolved in liquid ammonia in presence of ferric nitrate as catalyst, adding carbon disulphide and allowing to stand, and then refluxing with benzyl chloride.  Specifications 489,335 and 624,028 are referred to.ALSO:Alkyl-mercapto or aralkyl-mercapto substituted merocyanine dyes are prepared by condensing a compound of formula <FORM:0624027/IV (c)/1> wherein D1 is O or S, R1 is a hydrocarbon group, and R2 is alkyl or aralkyl, with a compound containing a reactive methylene group in presence of a basic condensing agent. The second compound may be (a) a 5-membered heterocyclic nitrogen compound containing in the ring a methylene group adjacent to a carbonyl group, or (b) a quaternary salt of a heterocyclic nitrogen compound having in the a - or g -position to the quaternary N atom a reactive methylene, methyl, or mono-substituted methyl group.  The dye produced may be reacted with an alkyl or aralkyl ester and the product reacted with a further compound of type (a) or (b), and if the second condensation is with a compound of type (a) which is a rhodanic acid or oxarhodanic acid, the process may be repeated as in Specification 489,335.  In examples: dyes are prepared by reacting 2-thio - 3 - methyl - 4 - keto - 5 - di - (methylmercapto) - methylenetetrahydrothiazole with (1) 1-methylbenzthiazole ethiodide; (2) quinaldine ethiodide; (3) lepidine methiodide, and (4) 1-phenyl-3-methyl-5-pyrazolone, and by reacting 2 - thio - 3 - ethyl - 4 - keto - 5 - di-(methylmercapto)-methylenetetrahydro oxazole with (5) 1-methylbenzthiazole ethiodide; (6) b -benzlepidine ethiodide, and (7) 1-methyl-b -naphthathiazole.  A sample has been furnished under Sect. 2 (5) of the Acts of a dye prepared by refluxing together 2 - thio - 3 - ethyl - 4 - keto - 5 - di-(benzylthio)-methylenetetrahydrothiazole, 2-methylbenzthiazole ethiodide, and triethylamine.  Specification 624,028, [Group IV (b)], also is referred to.
Patent GB-1063741-A (GB)
Title: Improvements in or relating to tufted pile fabrics
IPC: D02J1/22
Filed: 1965-01-07
Abstract: The weft of a woven base for tufted pile fabrics consists of a plurality of synthetic filaments joined together by a weak link so that when pierced by a needle the filaments separate without themselves being cut or broken.  They may consist of a cluster of fine filaments adhered together, or of a number of monofils lying side-by-side and sintered together, or of an extrusion in the form of side-by-side monofils each joined to the next by a thin web. The warp may be of flat monofil or may be the same as the weft.
Patent GB-735728-A (GB)
Title: Starters for internal combustion engines
IPC: F02N15/06
Filed: 1953-01-12
Abstract: 735,728. Turning-gear; heating air. INERTIA STARTER DEVELOPMENTS, Ltd., SILBERSTEIN, V., and DANILEWICZ, L. S. April 12, 1954 [Jan. 12, 1953], No. 902/53. Classes 7(3) and 7(5). In an engine starter comprising a pinion 1 movable axially into engagement with an engine gear 19, a flywheel which is rotated and then clutched to the pinion 1, and means for pushing the pinion against a spring 14 into the engine engaged position, the means include a latch comprising a collet 3 which has cantilever fingers, the collet rotating with the pinion and opening under centrifugal force at a predetermined speed to permit retraction of the pinion by the spring 14. Construction. A shaft 2 has fixed thereto the pinion 1 a spur wheel 12, a sleeve 11 and the collet 3, the latter comprising a cylinder the wall of which is slotted axially to form the fingers which are provided with inturned ends 4 defining between them an aperture that is only large enough to receive the reduced end 5 of a spring-loaded push rod 6. Intermediate its ends the rod 6 incorporates an abutment 7 adapted to be engaged by a spring- loaded arm 9, these members comprising a second latch. An electric motor, starter flywheel and a clutch are located in a housing 15, the motor being connected in series with a resistor 16 in the induction manifold 17 of the diesel engine to be started ; also in series with the motor is a switch 18. The pinion may be turned by means, not shown, to facilitate indexing with the engine gear 19. Operation. When the shaft 2 and push rod 6 are retracted the first latch 4, 5 is engaged and upon the push rod being actuated, directly or through a linkage or cable arrangement, not shown, against its spring 10 to engage the pinion 1 with the engine gear 19, the mechanism is retained in this position by the second catch 7, 9, and the switch 18 is closed by an abutment 20 on the sleeve 11 to energise the starter motor. Upon the flywheel attaining a given speed it is automatically or manually clutched to the spur wheel 12 to crank the engine, the induction air of which is warmed by the resistor 16. When the shaft 2 reaches a given speed the collet fingers move outwardly and disengage the first latch so that as soon as the engine starts and there is insufficient traction between the pinion 1 and engine gear 19 to maintain these latter parts in engagement, the spring 14 urges the shaft to the right to demesh the pinion since the aperture between the flexed collet fingers is of sufficient size to pass the larger diameter part of the push rod. This right hand movement also causes the abutment 20 to disengage the second latch and open the switch 18. Means, not shown, may be provided for manually disengaging the second latch.
Patent GB-470397-A (GB)
Title: Esters of methacrylic acid and their manufacture
IPC: C07C69/54
Filed: 1936-01-10
Abstract: Methacrylic acid esters of phenols, e.g. phenyl, o-cresyl, resorcinyl, p-cyclohexylphenyl, a - and b -naphthyl and hydroquinyl methacrylates and homologous methacrylates, the mono- and polymethacrylates of the mono-and polyhydric phenols such as resorcinol, catechol, pyrogallol, phloroglucinol, the di- or polyhydroxynaphthols and naphthalenes, thymol, diphenylolpropane and diphenylolnaphthane, are manufactured by reacting a lower ester of methacrylic acid with a phenol in the presence of an ester-interchange catalyst, or by reacting a phenol with a methacrylyl halide.  In examples: (1) methacrylyl chloride is heated with o-cresol to produce o-cresyl methacrylate; (2) phenol similarly yields phenyl methacrylate; (3) p-cyclohexylphenol similarly yields p - cyclohexylphenyl methacrylate; (4) resorcinol similarly yields resorcinyl dimethacrylate.  Polymerization products are manufactured by polymerizing the esters described above by the processes described in Specifications 465,789 and 467,900, if desired with the addition of the modifying agents ennumerated therein.  The polymers, interpolymers, mixed polymers and syrupy partial polymerization products may be employed for the purposes set out in the said Specifications.  In examples: (5) phenyl methacrylate is heated in acetone solution with benzoyl peroxide, and the polymer is precipitated by addition of gasoline or other non-solvent for the polymer; the product is moulded to a disc; (6) p-cyclohexylphenyl methacrylate is heated in methanol solution with benzoyl peroxide, and the product is moulded to a disc; (7) resorcinyl dimethacrylate is heated alone to 100 DEG  C.  Specification 15271/14, [Class 2 (iii)], also is referred to.
Patent GB-374477-A (GB)
Title: A pneumatic pump for deep wells
IPC: F04F1/06
Filed: 1931-01-10
Abstract: 374,477. Deep-well pumps. FUNDATOR, L. I., Leninskaia Sloboda, 4, Vostochnaja ultiza, Apartment 5, Moscow, U.S.S.R. Jan. 10, 1931, No. 942. [Class 102 (i).] A deep-well pump comprises two inner barrels 36, united by a partition which is supported in an outer barrel 35 by pipes 19. Pump pistons 14, 23 operating in the chambers above and below the partition draw liquid through the pipes 19 and suction valves 18 and discharge it through ports 16, 21, controlled by valves 17, 22, into the annular space 34, from which it passes through ports 44, 45 to the rising main 3. The pump is operated by compressed air supplied to the surfaces remote from the pump chambers of pistons 10, 10<1>, 30, 27 and the pump pistons 14, 23. The surfaces of the pistons adjacent to the pump chambers are permanently connected - to atmosphere through ports 46, 47, 40, 41 and a tube 2. During the down-stroke com- 'piessed air supplied by a pipe 1 to a chamber 4 containing a valve 5 passes through a port 37 to the piston 10 and by a passage and ports in .the piston-rod to the pistons 10, 14. At the end of the down-stroke a tappet-rod opens a spring-pressed valve 7 in the piston 10 and the compressed air passes to atmosphere through 'the port 46. The valve 5 then closes the port 37 and compressed air passes by a port 38 and tube 33 to the pistons 30, 27, 23, being exhausted at the end of the up-stroke through a valve 31 in the piston 30 and the port 40.
Patent GB-487954-A (GB)
Title: Improvements in barbed wire applicable to fencing
IPC: E04H17/04
Filed: 1937-01-12
Abstract: 487,954. Making barbed wire. ABBOTT, H. A. Jan. 12, 1937, No. 968. Convention date, April 1, 1936. [Class 83 (ii)] [Also in Group I] Barbed wire for fencing comprises a main wire A to which are welded in groups a series of short wires B, Fig. 3, provided with a recess B<1> to facilitate welding, each group presenting three or more points. In the form shown in Fig. 1, the short wires are welded to each other as well as to the main wire in star formation. In another form, Fig. 4, groups J are formed by spaced short wires.