baber/WOPTO huggingface dataset:
Patent GB-685350-A (GB)
Title: Improvements in or relating to signalling current transmission arrangements for two-wire repeater circuits
Inventor: LEBEDINSKY MYRON
IPC: H04Q1/442
Filed: 1951-02-06
Abstract: 685,350. Repeaters. SOC. ANON. DE TELECOMMUNICATIONS. Feb. 6, 1951 [March 28, 1950], No. 2935/51. Class 40 (iv). Incoming low-frequency signalling current is rectified and used to back-bias the speech amplifier 18 having a relay 4 in its anode circuit which thereupon operates (due to steady bias current in a second winding), said relay 4 connecting up outgoing signalling current from a source 8 and also operating a further relay 10 which short circuits the inputs to both go and return amplifiers to prevent singing. Relay 10 is slow-acting and remains operated during the whole of a dial train in an automatic system. Relay 10 also short circuits the load resistance 14 of the rectifier for signals in the reverse direction so that a reflected signal received from the outgoing line just after 4 has fallen back will not be retransmitted in the backward direction. In a modification, Fig. 2 (not shown), relay 10 is included in the cathode circuit of valve 18 and includes a biasing winding in series with that of relay 8. In this arrangement the use of break contacts in speech circuit is avoided, ringing current being collected from or injected over one of the coils of the hybrid transformer, one end of the coil being in the input circuit to one of the amplifiers, and the other end being in the output circuit of the other amplifier.
Patent GB-534383-A (GB)
Title: Improvements in or relating to dynamo electric machines
IPC: H02K9/14
Filed: 1940-02-16
Abstract: 534,383. Making dynamo-electric machines. SCOTT, W. Feb. 16, 1940, No. 2968. [Classes 83 (ii) and 83 (iv)] [Also in Group XXXV] Angular bending; dies. - A casing or carcase for a dynamo-electric machine is built up from a number of lengths of metal stock arranged longitudinally and welded or otherwise secured along their edges. Stock of T-section may be employed and the flanges bent to the curvation of the carcase, the webs forming cooling fins. The lengths of stock 3 are welded at 13 either along their whole lengths or at the end portions only. A number of separate sections may be thus built up and assembled around the core 6, which consists of laminations held in clips 14. The sections are then welded together, or secured by shrunk on straps or otherwise. Feet 21 may be welded to the edges of some of the webs 8 of the stock 3 and secured by plate 24 welded to the feet and some of the other flanges. The whole may be surrounded by an outer shell forming, with the webs 8, passages through which passes air drawn by a fan 30 through a perforated end plate 34.
Patent GB-1274741-A (GB)
Title: Improvements in or relating to means for setting the position of a rotatable member relative to another rotatable member
Inventor: ELLIOTT ERIC JOHN
IPC: G01B3/18
Filed: 1969-01-18
Abstract: 1,274,741. Splined couplings. ENGLISH NUMBERING MACHINES Ltd. 2 Jan., 1970 [18 Jan., 1969], No. 3050/69. Heading F2U. [Also in Division G1] A micrometer shaft 3 (see Division G1) is keyed by a pressed up part 14 engaging in a groove 17 to an internally splined cylinder 4 which is drivingly connected to another internally splined cylinder 2 axially aligned therewith by an inside sleeve 7 having a spring finger 6 engaging in the two sets of grooves. The number of grooves in one cylinder differs by one from the number of grooves in the other to assist initial setting up of the driving and driven members for engagement.
Patent GB-121405-A (GB)
Title: Improvements in Processes of and Apparatus for Preparing Potatoes for Dehydration.
Inventor: MANGELSDORFF MAX FRED
IPC: A23L19/12
Filed: 1918-02-21
Abstract: 121,405. Mangelsdorff, M. F. Feb. 21, 1918. Preserving potatoes.-Potatoes are treated preparatory to being passed into a drying-apparatus by being cut up into cubes, slices, &c. partly cooked by steam and preferably cooled by cold water. Peeled potatoes are picked by hand from a trough of water and placed on a conveyer belt, which carries them to a cutting- machine. The cut pieces fall into the hopper 14 of a cylindrical casing 15 having a rotary perforated steam-pipe 20 fitted with a spiral blade 21 and stirring-arms 22, which discharge the pieces into a tank 16 containing cold water and having rotating radial arms 39 carrying spring- mounted meshed scoops 40 which lift the pieces along an inclined part 34 of the base to a radial outlet. The pieces fall on to a perforated conveyer which allows water to drain off and which discharges to a drying-apparatus preferably of the kind described in Specification 120,501, [Class 34 (ii), Drying systems &c.].
Patent GB-721895-A (GB)
Title: New or improved rotatable cutting or abrading tools
IPC: B23D71/00
Filed: 1952-02-06
Abstract: 721,895. Rotary files. BOOTH, C. H., and HARDWICK, H. B. Feb. 4, 1953 [Feb. 6, 1952], No. 3179/52. Class 83 (3). [Also in Group VI] A rotatable cutting or abrading drum comprises a thin, flexible sheet or strip cutting element having a number of holes therein and hard, sharp cutting edges 11 upset from the sheet and each constituted by a portion of the edge of a hole, the cutting element being deformed to provide a cutting surface which is curved in the circumferential and axial directions of the drum. The drum may be of concave or convex form or both, with reinforcing members 20, 21 between its ends 16, 17 if required. Swarf is cleared through a central aperture in the end 16. The cutting edges 11 may be provided on the inside or outside of the drum, or both, and the ends of the cutting element joined by welding. The strip 10 is deformed during its own formation, or when the tube is being made, or after the tube has been made into cylindrical form. Instead of having a uniformly-curved surface, the drum may be made from the cutting element of ridged form described in Specification 695,830, the resiliency provided by the ridges preferably being employed to assist in retaining the drum on its hub. Specifications 666,573 and 695,821 also are referred to.
Patent GB-469943-A (GB)
Title: Improvements in and relating to methods and apparatus for treating fluids in heat transfer relationship with one another
IPC: F25J3/04
Filed: 1936-02-03
Abstract: 469,943. Heat-exchangers; liquefying gases. TRIGGS, W. W. (Gas Industries Co.) Feb. 3, 1936, No. 3240. [Class 8 (ii)] [Also in Group XIII] Two fluids pass through a heatexchanger in separate paths, and are thereafter caused to interchange their paths in the exchanger while each retaining the same general direction of flow. The Figure shows a pair of heat - exchangers 31, 52, in combination with an air liquefying and separating column 32. The air, oxygen, and nitrogen pass always through the same paths in the exchanger 52 which may be replaced by chambers forming enlargements of the pipe passages. The oxygen passes always through the pipes 58, 59. In one position, air entering by the valve 7 passes by passage 3 to the outer portions of the exchanger and through valve 12 to the pipe 46 leading to exchanger 52, while nitrogen flows from exchanger 52 through pipe 45, where it may be heated by a coil 56, and valve 16 through passages in the exchanger 31 and valve 5 to a valve 6 leading to storage consumption or waste. By reversing valves 5, 7 the nitrogen and air interchange paths in exchanger 31. Condensed moisture is removed by drains 1, 51. The air passages may be packed with silica gel &c.
Patent GB-981902-A (GB)
Title: Improvements in and relating to conveyor belts
Inventor: THOMSON CHARLES
IPC: F16G3/00
Filed: 1962-01-29
Abstract: 981,902. Belt fastenings. NORTH BRITISH RUBBER CO. Ltd. Oct. 23, 1962 [Jan. 29, 1962], No. 3300/62. Divided out of 968,552. Heading F2Q. Adjacent ends of a conveyer belt or belt sections have moulded or cemented therein, and protruding therefrom, metal rods 13 having swaged thereon sleeves 14 provided with spherical ends 20 and upper and lower clamping plates 22, 23 completely covering the area between the belt ends are screwed together to engage part spherical recesses 24 therein with the ends 20. The rods 13 protruding respectively from adjacent belt ends may be axially aligned as shown, the ends 20 then terminating in a normal flat surface 21, or intercalated, the ends 20 then being substantially completely spherical. The rods are of galvanized or sheradized metal or stainless steel and may comprise helically stranded wires. The belt may be of fabric ply construction or, as shown, may comprise outer surfaces of rubber material 10 and a central layer of longitudinal textile cords (not shown) in a fabric envelope 12, a portion of some or all of the cords being removed from the belt ends to permit the insertion of the rods. Each plate 22, 23 is outwardly tapered to permit limited relative angular movement of the rods.
Patent GB-514373-A (GB)
Title: Improvements in and relating to electric cut-outs
IPC: H01H85/06
Filed: 1938-02-03
Abstract: 514,373. Electric cut-outs. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 3, 1938, No. 3410. Void. Convention date, Feb. 6, 1937. Drawings to Specification. [Class 38 (i)] A high-tension cut-out comprises a number of parallel fuse wires embedded in sand &c. and of a material for which c. s. dt is less than for silver where c is the specific heat (or according to claim 1 the specific resistance), s is the "specific weight" and dt the rise in temperature from the initial temperature to the fusing point. Tin, lead, zinc, magnesium and aluminium are mentioned as complying with this condition.
Patent GB-698559-A (GB)
Title: New substituted propanols and processes for their manufacture
Filed: 1951-02-12
Abstract: The invention comprises the various stereo-isomeric forms of 2-dichloroacetamido-1-p-nitrophenyl - 3 - chloropropane - 1 - ol; the manufacture thereof by: (a) reducing a -di-chloracetamido - b  - chloro - p - nitropropiophenone by the Meerwein method using an oxidizable aluminium alkoxide (yielding predominantly the erythro forms), or (b) treating an erythro or threo form of 2-dichloromethyl-4-nitrophenylhydroxymethyl-D 2-oxazoline with hydrogen chloride under anhydrous conditions (yielding the erythro or threo forms according to the form of the starting material), or (c) treating a threo form of 2-dichloromethyl-4-chloromethyl - 5 - p - nitrophenyl - D 2 - oxazoline with dilute mineral acid and neutralizing the reaction mixture (yielding the threo forms); and the application of (c) to the epimerization of the erythro forms of 2-dichloracetamido-1-p-nitrophenyl - 3 - chloropropane - 1 - ol (e.g. as obtained in (a) or (b)) by treating them with strong sulphuric acid at a temperature not substantially above 45 DEG  C. and, without isolating the resulting threo oxazoline, diluting the solution and neutralizing it with a base at a temperature around 0 DEG C.  Method (a) is preferably carried out in an inert organic solvent using an aluminium alkoxide derived from an aliphatic secondary alcohol, e.g. with aluminium isopropoxide in isopropanol.  Method (b) may likewise be carried out in an inert organic solvent (e.g. dioxane), preferably at or about room temperature in the case of the threo forms and up to about 100 DEG  C. in the case of the erythro forms.  In method (c), the dilute mineral acid may be dilute hydrochloric acid, and neutralization may be effected with aqueous ammonia.  Examples illustrate the various processes as applied to the preparation of the DL-, D- and L-erythro and-threo compounds.  Specifications 698,542, 698,544, 698,560 and 698,566 are referred to.  a  - Dichloracetamido - b  - chloro - p - nitropropiophenone is obtainable by heating a -dichloracetamido - b  - hydroxy - p - nitropropiophenone with thionyl chloride.
Patent GB-118233-A (GB)
Title: Improvements in the Supply of Electrical Energy to Furnaces or other Appliances.
IPC: H05B3/00
Filed: 1918-02-27
Abstract: 118,233. Travis, W., and Watson & Co., T. H. Feb. 27, 1918. Phase, changing; polyphase transformcrs. - Electric are furnaces, resistance furnaces, &c., are supplied from threephase mains through a transformer whose primary windings are mesh connected, the secondary windings A D, B E, D E, being arranged as shown in Fig. 1. Electrodes a, b are connected to the ends of the windings A D, B E, the hearth electrode being connected to the point 0 in the winding D, E. The relative voltages of the transformers can be adjusted by tappings or by auto-transformer connexions. In a modification, the winding D E is divided, the parts B D, E B, Fig. 2, being connected to the ends of the windings 0 D, O E. In another arrangement, the primaries are arranged as shown in Fig. 3<a>, and the secondaries as in Fig. 3.
Patent GB-517061-A (GB)
Title: Improvements in gas washing arrangements
IPC: C10K1/18
Filed: 1939-02-02
Abstract: 517,061. Gas washing processes. HOLMES & CO., Ltd., W. C., COOPER, C., and HENSHAW, D. M. Feb. 2, 1939, No. 3478. [Class 55 (ii)] [Also in Group III] Oil &c. used in a bubble tray washer 10 for removing benzole and sulphur from gases is pumped through a heat interchanger 3 in counterflow with vapours from a stripping still 5, the oil returning through the still and. a cooler 7 to the washer by gravity. Steam is supplied to the still through a pipe 6 and vapours therefrom pass via the heat exchanger to a condenser 13. The oil cooler and condenser 13 may comprise a common assembly of coils subjected to a cooling water stream. Steam condensed in the still may be collected in a separator 15. Orifice plates, 16, 17 may be inserted in the pipe on the pressure side of the pump to control the rate of oil flow. Specification 430,989, is referred to.
Patent GB-804067-A (GB)
Title: Process for the production of cross-linked elastomers
IPC: C08G18/76
Filed: 1956-02-03
Abstract: In a process for the production of cross-linked elastomers of high molecular weight, an isocyanate-modified linear polyester containing terminal isocyanate groups is reacted with an amount less than that necessary to react with all the isocyanate groups of the modified polyester, of a mixture of (a) an organic compound having only two groups capable of reacting with isocyanate groups, and (b) a trihydric alcohol.  As compounds with only two groups capable of reacting with isocyanate groups there are mentioned 1,3- and 1,4-butanediols, 1,4-butendiol, 1,4-butinediol, 1,6-hexanediol, quinitol and hexahydroquinitol, and difunctional alcohols or amines the carbon chain of which is interrupted by hetero atoms such as O, N, S and SO2. Suitable trihydric alcohols are trimethylol glycol, trimethylol propane (C2H5.C(CH2OH)3), hexanetriol ((CH3CHOH)2-CH-CH2CH2OH), triethanolamine, triisopropanolamine and trihydric alcohols the carbon chains of which may be interrupted by hetero atoms. Typical isocyanate-modified polyesters which can be used are those described in Specification 700,608.  In their preparation there may be reacted ethylene glycol, diethylene glycol, propylene glycol-1,3, butylene glycol-1,4, hexamethylene glycol, methylhexanediol-1,6, 2,21-dimethyl - 1,3 - propylene glycol and thiodiglycol; malonic, succinic, adipic, methyladipic, maleic, dihydromuconic, thiodipropionic, sebacic and suberic acids; tetramethylene, hexamethylene, p-phenylene, toluylene and naphthylene-1,5 diisocyanates.  Preferred are linear hydroxy polyesters from adipic acid and ethylene glycol or diethylene glycol having an hydroxyl number of 40 to 65, modified by reaction with excess 1,5-naphthylene diisocyanate.  In an example a dehydrated adipic acid/ethylene glycol polyester of hydroxyl number 56 is reacted with heating with 1,5-naphthylene diisocyanate.  Portions of the product are melted together with mixtures in various proportions of 1,4-butanediol and trimethylol propane (and, for comparison, with each of these compounds alone). The products can be used in the manufacture of aprons gaskets, belts, shoes, tyres, tubes, bearings, ball-and-socket joints, and handles of mechanically actuated hammers and drills.
Patent GB-198731-A (GB)
Title: Improvements in cinematograph films and in supporting means therefor for use in connection with projecting machines
IPC: G03D15/00
Filed: 1922-02-07
Abstract: 198,731. Price, A. Feb. 7, 1922. Kinematograph picture films.- An endless celluloid kinematograph film is strengthened by a flexible endless strip of a material stronger than celluloid which is permanently attached to the film. The strip may consist of brass, may have perforated edges and be cut away between the edges, and may be cemented to the film. As shown, the strip 25 has cross-bars 26 carrying prongs 27 which are passed through openings in the film and bent over to secure the strip to the film.
Patent GB-628282-A (GB)
Title: Improvements in or relating to self-locking nuts
IPC: F16B39/32
Filed: 1947-02-07
Abstract: 628,282. Locking nuts. MARTIN, W. H. Feb. 7, 1947, No. 3695. [Class 89 (i)] Nuts are locked by coiled springs with their ends out of engagement with the threads. One end of the nut has a recess 13 for the spring the ends of which project radially, one end being anchored by a slot or blind hole 16 and the other projecting through a transverse slot 19. This end has a loop to facilitate manipulation. To free the nut for unscrewing the looped end of the spring is moved into the slot 19<SP>1</SP>. The slot 18 may be of the same depth as 191 so that the spring may be held in the locked position. As applied to a union nut the spring is located in the cylindrical extension. The relative position of the slots 16, 18 &c. may be varied with corresponding variation in the form of the springs.
Patent GB-776534-A (GB)
Title: Kinematograph projectors
IPC: G03B21/60
Filed: 1954-02-09
Abstract: 776,534. Kinematography. PERFECTONE SOC. ANON. Feb. 9, 1954 [Dec. 30, 1953], No. 3808/54. Class 97(1) A film 14, Fig. 3, carries pairs of identical images I, Ia &c of half the normal height 'and spaced in the direction of the length of the film, the film being projected in a projector in which, Fig. 2, it is spaced from an illuminated aperture, not shown, of a size corresponding to two adjacent images, the light from the aperture being directed through the related film images by systems 9, 10, the images being projected into superposition by objectives 11, 12. Specification 768,243 is referred to.
Patent GB-1000466-A (GB)
Title: Improvements in and relating to light fittings
Inventor: KEMBER RAYMOND CHARLES
IPC: A47J45/10
Filed: 1963-09-27
Abstract: 1,000,466. Two-part couplings; lamp holders. R. C. KEMBER, and J. G. ALLISON. Sept. 27, 1963, No. 38252/63. Heading H2E. A light fitting, for a fluorescent tubular lamp and its associated starter switch 20, comprises a channel-section member 10, a cover 11 for the open side of the channel and a resilient mounting 16 for the starter switch 20 arranged to bias the starter switch outwardly of the channel to facilitate the removal of the starter switch when the cover is removed. The resilient mounting 16 is secured to the socket 19 by lugs 18 and to a spring-loaded catch 12 which is more fully described in Specification 957,287 and secures the cover 11 in position. One of the lugs 18 has an extension 21 which provides an earthing means for the casing of the switch 20.
Patent GB-229312-A (GB)
Title: Improvements in and relating to pressure relieving diaphragms for electrical apparatus casings
IPC: F26B11/02
Filed: 1925-02-11
Abstract: 229,312. British Thomson-Houston Co., Ltd., (Assignees of Frank, J. J.). Feb. 12, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Pressure-relieving devices for fluids. - The pressure-relief pipe 4 of a transformer casing 3 or other oil-filled tank for electrical apparatus is closed by a diaphragm 5 of a brittle material such as glass or compressed shellac, which will rupture before being distorted to any considerable extent. The diaphragm is secured between gaskets by a ring 6, and a screen 7 may be provided at the outer end of the relief pipe.
Patent GB-136135-A (GB)
Title: Improvements in Automatic Lubricators.
IPC: F16N9/02
Filed: 1919-02-17
Abstract: 136,135. Soc. Gaget Simart, and Remegeau, F. Dec. 4, 1918, [Convention date]. Centrifugal-action and force-feed lubricators.-A lubricator for pulleys, wheels, &c. contains a piston 4 acting centrifugally to force oil down a central pipe 5 to the outlet 2, the flow being regulated by a screw valve 7 locked by a nut. A hole 6 admits air to the lower side of the piston. When the lubricator is applied to a stationary part, the piston is actuated by a spring.
Patent GB-104738-A (GB)
Title: Coal Saving and Smoke Prevention Device for Steam Boilers.
Inventor: SHILL ALBERT EDMUND
IPC: F23L7/00
Filed: 1916-03-16
Abstract: 104,738. Shill, A. E., and Vallely, J. March 16, 1916. Combustion products, returning to furnaces.- A jet of superheated steam is delivered into a funnel B mounted in a baffle A in the flue, and a pipe C conveys the mixed steam and gases to the furnace above the lire or below the grate. Fig. 4 shows the application to a vertical boiler.
Patent GB-738852-A (GB)
Title: Frequency-selective electrodynamic detector
IPC: H01H51/32
Filed: 1953-02-12
Abstract: 738,852. Dynamo electric machines. SVENSKA AKTIEBOLAGET GASACCUMULATOR. Feb. 12, 1953 [Feb. 27, 1952], No. 3983/53. Class 35. [Also in Groups XXXVII and XL (b)] A frequency-responsive electromagnetic converting arrangement comprises a conducting loop 5 comprising one portion movable in a magnetic field, e.g. of a bar magnet 13, and another portion forming the secondary winding of a transformer which includes a magnetic core 11 and a primary winding 15 to which the input is fed at terminals 25. As the conducting loop 5 surrounds the magnet 13 at a place nearer one pole than the other, the current induced in it by transformer action causes it to vibrate about shaft 8 on which it is mounted, at the frequency to which it is tuned, provided the input supply at 25 contains a component of such frequency. The resonant frequency of the oscillating system is controlled by rotating a cylindrical permanent magnet 20 in a hole in a cap 4 mounted on the open upper side of the non-magnetic channel-shaped mounting 2 of the device. Such rotation alters the strength of flux passing through fixed poles 18, 19 bearing elongated shoes 23, 24, and through an iron strip 17 mounted on loop 5. This flux also establishes the neutral position of the oscillating system. This loop 5 drives a similar conducting loop 6 which vibrates about the neutral plane midway between the poles of another permanent magnet 14, the loop 6 thus having induced in it currents of twice the frequency of vibration, which are transmitted by transformer action to a winding 16 on core 12. For constant Q of loop 5, the magnet 13 may be provided with an elongated shoe.
Patent GB-1543009-A (GB)
Title: Vacuum switch
IPC: H01H33/18
Filed: 1977-02-01
Abstract: In its gas-tight evacuated housing, the vacuum switch contains a stationary contact element and a contact element which moves towards and away from said stationary contact element. At least one of these contact elements has a disc-shaped contact part and a sleeve-shaped part (11, 12) connected thereto. The conductor (13, 14), which is arranged in the sleeve-shaped part and is connected electrically in series to the disc-shaped contact part, is of spiral shape and supplies a magnetic field which interrupts the current. The spiral construction of the conductor allows simplified production of the conductor with the contact element. <IMAGE>
Patent GB-489217-A (GB)
Title: Improvements in or relating to centrifugal machines for casting metal tubes
IPC: B22D13/10
Filed: 1938-02-09
Abstract: 489,217. Casting-machines. BUDERUS- 'SCHE EISENWERKE. Feb. 9, 1938, No. 4078. Convention date, Feb. 11, 1937. [Class 83 (i)] A centrifugal mould 1 having a water jacket 2 rotating therewith is provided with a spiral baffle or a number of annular baffles 5 secured to the jacket and with a clearance 6 adjacent the mould. If a spiral baffle is used, the mould is so rotated that the baffle tends to feed the water in a direction opposite to that in which it is supplied at 7.