baber/WOPTO huggingface dataset:
Patent GB-813140-A (GB)
Title: Method and apparatus for the production of conductive patterns
IPC: H05K3/06
Filed: 1956-09-05
Abstract: 813,140. Etching. SYLVANIA ELECTRIC PRODUCTS Inc. Sept. 5, 1956 [Sept. 9, 1955], No. 27238/56. Class 100(2) A method of producing a conductive pattern on a base formed with a conductive surface comprises the steps of placing a stamp of resilient material having a raised pattern in the shape of said conductive pattern against the conductive surface of the base, holding the stamp against the conductive surface by creating a pressure difference between the stamp and the base and exposing the assembly thus produced to chemical attack by a substance to which the base and resilient material are substantially impervious to etch away the conductive surface in regions unprotected by the raised pattern. A laminate L comprises an insulating base 10 and an adherent conductive layer 12 of copper, or solderable zinc-tin alloy plated on aluminium foil. Alternatively the base may be aluminium and the layer a zinc-tin alloy. The stamp 18 includes a body 22, which may be of natural or synthetic rubber, neoprene, polythene or "Teflon" (Registered Trade Mark), and a backing 20, the body 22 having raised portions 24a, 24b in the desired pattern. Etching fluid in a tank 16 is withdrawn through a bore 28 in the stamp by a pump 32 and returned to the tank through a pipe 30, thus creating the pressure difference and holding the laminate L against the stamp. Alternatively, a vacuum line separate from the etching fluid flow system may be provided, the inlet port being surrounded by a small raised annular portion of the stamp body. If any areas are completely isolated by the raised pattern, inlet and outlet ports for the etching fluid are provided within said areas. If a large area is to be masked, the raised portion need only define the edge of said area, being hollowed out, and an air inlet passage may be provided within the area. If patterns are to be produced on both faces of the laminate, the latter is provided with a conductive surface on each face, and a stamp is brought into contact with each surface, the stamps having integral aligning plugs received within openings in the laminate. The openings may be plated through holes serving as connections between the two conductive patterns. In operation, the etching fluid undercuts the edges of the parts of the conductive surface not to be removed. The pressure of the stamp then forces the resulting overhanging edge portions of the surface against the base so as to stop further etching.
Patent GB-441537-A (GB)
Title: Method and apparatus for making emulsions
IPC: B01F5/10
Filed: 1934-10-12
Abstract: <PICT:0441537/III/1> A method of making emulsions consists in severing sections from the end of a stream of material to be emulsified and dispersing these in a circulating stream of previously made emulsion. Preferably the latter stream is subdivided, and material to be emulsified is added to one portion and water and emulsifying agent to the other, after which the two portions are recombined. In the illustrated apparatus emulsion from the vessel 42 is circulated via the passage 19, the two outlets 21, and the passages 35, 37 back to the vessel.  Each passage 21 contains two sets of rotating helical blades 26, 27 separated by a set of fixed radial blades 32; opposite the periphery of the blades 26 are passages (not shown), supplying respectively water and material to be emulsified.  These materials are cut into sections by the blades 26 and dispersed in the circulating emulsion by the blades 27, 32. Specification 438,680 is referred to.
Patent GB-533092-A (GB)
Title: Improvements in frequency discriminator circuit arrangements
IPC: G01R23/00
Filed: 1939-10-05
Abstract: 533,092. Frequency measurement. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., WRIGHT, F. M., and FORSTER, H. J. Oct. 5, 1939, No. 27304. [Class 37] The extent of departure of a frequency from a datum frequency is directly indicated by means of a frequency discriminator circuit arrangement comprising a circuit having a frequency dependent response characteristic and an indicator calibrated with reference to a datum frequency, a potential or current derived from the frequency dependent circuit being applied to the indicator. A mixer valve V1, Fig. 1, has applied to it at A, B one of the frequencies to be compared, oscillations from a local oscillator V2 being applied to the third grid of the valve V1. The valve V1 feeds into a mixer output circuit D, which is coupled by a resistance capacity network C1, C2, r1, r2 to the grid of an isolator valve V3. The anodes of the valves V1, V2, V3 are connected to a source of high positive potential, an impedance r3 being connected in the anode circuit of the valve V3. The anode and cathode of the valve V3 are capacity coupled through a load resistance r4 in series with a condenser c4. Across the circuit r4, c4 is connected a rectifier V4 the cathode of which is tapped on a potentiometer connected to a source of bias potential. Across the condenser c4 is connected an indicator E, the scale of which may be calibrated in frequency differences. The reference frequency is applied to the input terminals A, B and the local oscillator is adjusted to show maximum output current at the indicator E, corresponding to the point C, Fig. 2. The local oscillator is then adjusted to produce a response corresponding to the point F, the range of discrimination of frequency difference then being Œ 50 kc. This range may be varied by adjusting the elements c1, c2, r1, r2.
Patent GB-323222-A (GB)
Title: Improvements in or relating to magnetic materials
IPC: C22C19/00
Filed: 1928-09-24
Abstract: 323,222. Beatty, W. E., (Bell Telephone Laboratories, Inc.), Sept. 24, 1928. Drawings to Specification. Annealing.-Magnetic materials similar to those described in Specification 273,638 consist of 20-54.5 per cent of nickel, 20-40 per cent of iron, 15-50 per cent of cobalt, and up to a total of 10 per cent of one or more of the following elements: molybdenum, tungsten, manganese, vanadium, tantalum, zirconium, copper, and silicon, with or without chromium, and are heat-treated to develop high permeability at low magnetizing forces. The heat-treatment may comprise heating to 800-1150‹ C. until at a uniform temperature throughout, and subsequently maintaining the temperature for a time at 400-500‹ C.; or heating to 1000-1150‹ C., cooling to 400‹ C. at “-5‹ C. per minute, reheating to about 600‹ C. and cooling at 5-25‹ C. per second; or heating at about 1100‹ C. for about 1 hour, cooling at not more than 200‹ C. per hour to 600‹ C., and cooling to 400‹ C. in more than 2 hours. A conductor uniformly loaded with the material may be heated at about 800‹ C. for about 1 hour, and cooled during about 10 hours, with or without interruption of the cooling at 400-500‹ C. for about 8 hours; or a conductor may be passed continuously through a furnace and annealed at about 800-900‹ C., and after cooling reheated in coils at about 350-450‹ C., followed by slow or moderate cooling. Specifications 188,688; 189,832 and 220,710, [both in Class 82 (i), Metals, Extracting &c.], also are referred to.
Patent GB-830191-A (GB)
Title: Improvements in shelf supports
IPC: A47B57/40
Filed: 1957-08-30
Abstract: 830,191. Brackets. WARD.E.S.W. Aug. 26, 1958 [Aug. 30, 1957], No. 27388/57. Class 52(5) A loop-shaped retaining member 17 extends horizontally through a hole in an upright support 20 to form a socket for a wedge-shaped tail 25 on a bracket. Two brackets can be mounted back to back as in Fig. 7 by using a closed loop and can secure two sections of shelving together or loops may be formed on one bracket of a pair as in Fig. 9. As an alternative the bracket may be of bent wire as in Fig. 11. A lower nose-piece 14 can be provided to enter a lower hole on the upright.
Patent GB-426766-A (GB)
Title: Improvements in or relating to electric lighting installations
IPC: H05B41/232
Filed: 1934-09-25
Abstract: 426,766. Supply systems for vacuum &c. lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Sept. 25, 1934, No. 27527. Convention date, Sept. 30, 1933. Addition to 389,025. [Class 38 (iv)] Discharge lamps 6 are connected to the secondaries of transformers 2 the primaries of which are in series with each other and with an unsaturated choke 4, the transformers 2 being designed to be saturated at no-load. The arrangement is stated to facilitate starting of the discharge. The choke 4 has a large leakage field and may be variable so as to maintain the current at constant strength. It may comprise two series connected coils mounted on a common core, one being fixed and the other movable and suspended from a pivoted arm balanced by a counterweight.
Patent GB-1015860-A (GB)
Title: Wicket conveyor drying machines
Inventor: COTTERELL JEFFREY
IPC: F26B15/08
Filed: 1964-07-03
Abstract: 1,015,860. Printing-machines; sheet-delivery apparatus. SCREEN PRINTING MACHINERY Ltd. July 3, 1964, No. 27612/64. Headings B6C and B6H. [Also in Division F4] Sheets leaving, e.g., a printing machine, drop one-by-one into compartments formed by partitions 11 on a wicket conveyer and are carried along the upper run and then along the lower run of the conveyer for drying, means being provided, e.g. projections 11<SP>1</SP> on the partitions, for preventing the sheets dropping out of the compartments, and an adjustably-inclined delivery-conveyer 5 being situated at the unloading end of the drying conveyer. The upper ends of the bands forming the conveyer 5 may engage between wires forming the partitions 11 or may be situated just below the partitions. Intermittently or continuously-acting air-nozzles 9 may be provided to assist in the dislodging of the sheets from the compartments. The sheets pass from the conveyer 5 to a slower-moving conveyer 14 leading to a box. Pressure-sensitive switches may be provided to stop the conveyer if it should become fouled up.
Patent GB-190581-A (GB)
Title: Method and apparatus for measuring resistances and magnitudes of which the measurement can be reduced to the measurement of a resistance
IPC: G01R27/02
Filed: 1921-10-18
Abstract: 190,581. CoppÚe, M. Oct. 18, 1921. Indicating. - Electric resistances and other magnitudes which can be measured in terms of resistance, such as inductances, capacities, magnetic fields, and temperatures, are measured by connecting the resistance element in circuit with the armature of an electric generator which is subjected to a substantially constant turning- couple, and measuring the speed of rotation of the armature, which is proportional to the resistance under test. As shown in Fig. 1, the driving- motor is hand-operated, and comprises a spiral spring 1 fixed at one end to a driving-spindle 2, and at the other end to a box or casing 3 connected through gear wheels 4 - - 9 to a vertical shaft 10, which is connected by a spring 17 at its upper end to the armature shaft 16. Secured to the shaft 10 is a collar 27 connected by resilient blades 28 to a sliding collar 29 carrying a plate 30. The blades 28 have weights 31 attached which move outwards under centrifugal action when the spindle 10 is rotated, thereby raising the collar 29 and plate 30 which operate a bellcrank lever 33. A silk thread 35 attached to the bell-crank lever passes over guide pulleys 36 - - 38 and is turned around a pulley 39 on a spindle carrying an indicating-needle 40 which moves over a graduated dial 42. The end of the thread 35 is attached to a flexible spring 41, and the position of the pointer can be regulated by varying the position of the carrier 43 of the pulley 38 by an adjusting-screw. The speed-indicating scale is checked against a standard resistance. The tension of the spiral spring 1 can be varied by turning a handle 53 on a shaft 54 geared by wheels 55, 56 to the driving-shaft 2. The spring is maintained under tension by a pawl 57 which normally engages the gear wheel 56, and which is disengaged under the action of a connecting-rod 58 when the spring is wound up. In a modification, the motor is replaced by one of the type comprising a weighted chain or equivalent acting on a rotatable drum.
Patent GB-276398-A (GB)
Abstract: 276,398. Raytheon Manufacturing Co., and Smith, C. G. April 20, 1926. Vacuum tubes.-In apparatus for generating alternating current and oscillations, of the type having means for feeding periodic impulses from a source into a resonant circuit, the feeding means comprise a gaseous discharge tube 10 with two electrodes 31, 32 not heated from an external source and without a control' electrode, the gaseous gap between the electrodes becoming non- conducting when the current rises to a critical value. 'The gas may be helium and the distance between the electrodes 31, 32 is short and approximates to the mean free electron path in the gas so that electrons passing straight from one electrode to another do not produce ionization. The field of a permanent magnet. 11 increases the paths of the electrons and makes the gap conductive by unsupported gaseous discharge but, as the current across the gap is increased, the increasing voltage straightens the electron paths until they become so short that ionization and conduction suddenly cease. The magnet 11 is adjustable relatively to the tube 10 to adjust the field, which may be such that the tube conducts in one direction only. The tube is connected between a direct-current source 14 and a resonant circuit comprising a large inductance 16 and a small condenser 18, the current through the source 14 being steadied by chokes 21, 22. On closure of the switch 23, the current increases until the tube ceases to conduct and the circuit 16, 18 begins to oscillate until the voltage across the tube 10 falls below the critical value and the tube 10 feeds another current pulse to the circuit 16, 18. The oscillations produced have a frequency of from 10 to 100,000 cycles per second and are transferred to an output circuit 26. A condenser 20 provides a current path when the tube 10 ceases to conduct. A construction of discharge tube (Fig. 1, not shown) is described with concentric electrodes and an axial magnetic field, magnetic pole-pieces inside the tube being separated by a copper or other non-magnetic slotted sleeve and all gaps through the gas between parts at different potentials being short. Specification 246,036 is referred to. Reference has been directed by the Comptroller to Specifications 4664/14,170,015 (as open to inspection under Sect. 91 (3) (a) of the Acts); 201,272, 223,681, [both in Class 38 (ii), Electric currents, Converting &c.], and 230,026.
Patent GB-1038058-A (GB)
Title: Improvements in the recovery of solvent from solutions containing dissolved non-volatile substances
Inventor: LICHTENSTEIN JOSEPH
IPC: C02F1/08
Filed: 1964-07-04
Abstract: 1,038,058. Distillation of liquids, particularly water. SALINE WATER CONVERSION CORPORATION. July 4, 1964, No. 27674/64. Heading B1B. Solvent is separated from solutions of non- volatile solutes, e.g. saline water, by heating the solution and introducing it through conduit 20 into enclosure 12 where the heated solution is distri-. buted by troughs 19 to the upper ends of plates 21 so that the solution flows in film-form down the sides of the plates, the pressure differential between the interior of the enclosure and the saturation pressure of the solution at any given point of the films being such that gradual vaporization (but no flashing) of the solvent takes place from the downflowing films. The concentrated solution collects in troughs 22, and the vapour flows on to condenser 11 which is provided with cooling coils 30, and is evacuated by air-pumps 36. Vertical slabs may be disposed between plates 21 to provide vapour-channels which gradually increase in width in the downward direction, thereby ensuring an appropriate decrease in pressure and suitable vapour velocities throughout the channels. Alternatively, the slabs may be dispensed with, and the plates may be tapered so that they diverge from each other in the downward direction as shown in Fig. 5. The vapours may be compressed before they are admitted to the condenser. The condensershell is supported by springs 32, and an expansion joint 34 between the shell and the evaporator permits free movement due to temperature variations. The condensate is withdrawn by pump 35. The concentrated solution flows from troughs 22 into troughs 24, and is then withdrawn through troughs 25 and conduit 23. In order to produce potable water from sea water, the latter is pumped through the condenser tubes 30 and thence through the condenser tubes of a steam-power plant; the hot sea water is then introduced into the film-evaporator. Alternatively, one stream of sea water may be pumped through the condenser tubes 30, and then discharged into the sea, while an independent water stream circulates between the auxiliary heat source and the evaporator. Several evaporator/ condenser units may be connected together to form a multi-stage system, each unit being disposed at a slightly lower level than the preceding one.
Patent GB-318762-A (GB)
Title: Improvements in or relating to the transportation of pulverulent materials
IPC: F23K3/00
Filed: 1928-09-27
Abstract: 318,762. General Electric Co., Ltd., and Cockburn, D. H. Sept., 27, 1928. Pneumatic conveyers. - In a conveyer in which pulverulent material is conveyed through a pipe by a current of gas and delivered at a number of points, a distributor in the pipe is arranged to divide the mixture of the gas and material into a plurality of streams and to combine and supply to one or more of the delivery points a plurality of the said streams which have each been derived from a different position in the original mixture. The drawings show a distributor for supplying pulverized fuel to a pair of burners. The inlet 1 contains a diaphragm 2 provided with a plurality of openings 3, 4. The openings 3 opened into ducts 5, which reunite to form the outlet 6, and the openings 4 communicate with the outlet 7.
Patent GB-266781-A (GB)
Title: Improvements in and relating to rotary engines, pumps, meters, and the like
IPC: F01C1/04
Filed: 1925-11-04
Abstract: 266,781. Preston, A. G., (Administratrix of Preston, J. E.), Brassington, A. E., and Mahony, M. B. Nov. 4, 1925. Fixed-abutment type. - In rotary engines, pumps, &c. of the kind wherein a rotor 5 carries sliding-rocking vanes 6 which contact with a casing 3, the vanes are actuated by a sun-wheel 13 on the rotor shaft which drives through an intermediate wheel 12 a toothed wheel 11 mounted on a spindle 10 carrying an eccentric 9. The vane 6 embraces the eccentric 9 at its inner end. Each vane may be formed in two parts pressed apart by a spring. Elliptical gears or toothed wheels with offset centres may be used to obtain variable velocities of the eccentrics 9.
Patent GB-495178-A (GB)
Title: Improvements relating to trousers and like garments
IPC: A41D1/06
Filed: 1937-12-10
Abstract: 495,178. Trousers &c. WHITEHEAD, A. Dec. 10, 1937, No. 27776/38. Divided out of 494,213. [Class 141] A trouser &c. cuff is provided with a supplemental covering 17 which is adapted to be removed when it becomes worn to expose the actual lower edge 16 of the cuff, the covering 17 being extended over the upper edge of the cuff, and seamed at 19 to the rear surface 20 thereof adjacent the upper edge of the cuff, the covering 17 also being extended over the lower edge 16 of the cuff, and seamed at 21 to the inner surface of the trouser leg adjacent to the edge 22 of the lower inturned portion 22<1> of the outer fold of the cuff. Specification 467,462 is referred to.
Patent GB-813142-A (GB)
Title: A flow-rate sensitive device
IPC: G01F1/37
Filed: 1956-09-12
Abstract: 813,142. Fluid-flow responsive devices. BELL BROS. (MANCHESTER 1927) Ltd., and WHITEHEAD, R. Sept. 5, 1957 [Sept. 12, 1956], No. 27829/56. Class 40 (1). A device sensitive to fluctuations in fluid flow in a duct comprises a mercury manometer joined across an orifice plate, venturi or other restriction in the duct, with electrodes suspended in the manometer and displaced in accordance with fluctuations in the level of the mercury by a reversible electric motor whose controlling circuit passes through the electrodes and the mercury. In the normal condition of the apparatus the level of the mercury 41 (which is covered by a non-conducting liquid 60 such as carbon tetrachloride) lies between the ends of two electrodes 21, 22, which are suspended by an arm 19 (Fig. 1) whose upper end moves in a slot 28 in a cam plate 29. When the motor 32 is energized, as described below, it moves a nut 33 along a screwed rod 30 and displaces the cam plate laterally to raise or lower the electrodes. Fluctuations in fluid flow in the pipe 10 cause a variation in the pressure difference between 12 and 13 and hence alter the mercury level in the manometer. In the normal condition as shown in Fig. 4 a circuit is completed from the power supply at 39 through the submerged electrode 40 and the electrode 21 to .energize relay coil 34 and thereby hold contacts 43 and 44 open. The coil 36 is also energized through the (closed) switches 52 and 53 to close contacts 55 and 56, but coil 35 is not energized so that contacts 46 and 47 are open and the changeover switch 49 is to the left. The motor 32 therefore does not run. If the mercury level rises, a circuit is established through electrode 22 to energize coil 35, and the motor is now supplied via contacts 47 and switch 49 in the right-hand position. The motor runs until the electrode assembly has been lifted far enough for electrode 22 to be clear of the mercury when conditions revert to normal. Similarly, a drop in mercury level uncovers electrode 21, breaks the supply to coil 34 and energizes the motor in the reverse direction via the closed contacts 44 and the switch 49 in the left-hand position. A valve of a pump can be connected to any of the movable parts 29, 30 or 33 to control the flow of liquid in the pipe, and for this purpose the shape of the slot 28 is preferably designed so that the displacement of the nut 33 is proportional to the fluid flow. The switches 52 and 53 are opened when the nut 33 reaches the ends of its travel to prevent damage by overrunning of the motor. When one of these opens the supply to coil 36 is interrupted and is re-made only when the appropriate one of the contacts 43 and 46 is closed to permit running of the motor away from the end.