baber/WOPTO huggingface dataset:
Patent GB-1384254-A (GB)
Title: Device for insertion into the reproductive tract and method
IPC: A61D7/00
Filed: 1972-01-19
Abstract: 1384254 Anchoring devices for reproductive tracts AGROPHYSICS INC 19 Jan 1972 [22 Jan 1971 (3)] 2571/72 Heading A5R An anchoring device 30 for insertion into the tubular reproductive tract of a female animal or human being, comprises cylindrical mounting means 20, and spaced-apart yieldable anchoring means 32 carried by the mounting means and projecting outwardly from the cylindrical surface of the mounting means and being disposed circumferentially about and extending longitudinally of the axis of the mounting means, the anchoring means 32 defining spaced channels between the tract wall and the device for permitting bypass of reproductive-tract fluids. Assemblies may be coupled with the anchoring device for retention in the reproductive tract for a variety of functions including: external visual indication of oestrus; artificial insemination; and the delivery of drugs over a period of time. The yieldable anchoring means 32 are preferably curved resilient strands of nylon or polyethylene. For the purpose of indicating oestrus the anchoring device is provided with an indicator assembly 34 which is releasably mounted on the mounting means 20 of the device and whioh comprises a protective sheath 40 and an internal spring member. A mechanically operated oestrus fluid sensing assembly, not shown, retains the indicator assembly 34 on the mounting means 20, Figure 1 (not shown), and releases it under the action of the spring member upon sensing the presence of oestrus fluid for subsequent expulsion by the animal, Figure 2. The indicator assembly 34 may alternatively be replaced by a dye. In the case of drug administration or artificial insemination the mounting means (112), Figure 9 (not shown), includes a container (120) for the drug or semen and a biassing member in the form of a piston (121) to expel the drug or semen through a duct (124) and into the cervical opening. The piston is activated by means of an expandable material within the housing such as solid carbon dioxide or germinatable seeds in contact with water. In order to maintain semen in a frozen or reduced temperature state liquid nitrogen or solid carbon dioxide is disposed around the semen container. Drugs in solid form may simply be contained in a permeable silicone rubber envelope. Slowly soluble, sublimable or vaporisable coatings or plugs may be used as time delays. For use in cows the anchoring device may also be provided with a cervical anchor assembly, Figure 7 (not shown), including a clamping ring (58) to fit over the projecting annulus of the cervix, and a cylindrical rear member (56) for stimulation of the vaginal sphincter-like muscle.
Patent GB-648737-A (GB)
Title: Improvements in absorption refrigerating apparatus
IPC: F25B15/10
Filed: 1946-10-30
Abstract: 648,737. Refrigerating ELECTROLUX, Ltd. Oct. 30, 1946, No. 2581/49. Convention date, Nov. 8, 1945. Divided out of 648,673. [Class 29] The subject-matter described is the same as that shown in Fig. 2 of Specification 648,673 but the claims are directed to a continuous cycle inert gas absorption refrigerating system having a plurality of evaporator elements operating at different temperatures and conduits leading gas mixtures enriched in different evaporator elements through different gas passages into different parts of the absorber system. Gas mixture from the low temperature evaporator 17 flows by way of conduits 30, 38, heat exchanger 19 and conduit 21 to the absorber coil 18 which it enters with a partial pressure of ammonia of 1.5 atmospheres. Gas mixture from. the high temperature evaporator 32 flows by way of conduit 50 in thermal contact with the exchanger 19 and conduit 51 to the absorber vessel 22 having been joined with gas mixtures flowing from the pre-cooler 13 through a conduit 41 byepassing the exchanger 10. This gas enters the vessel 22 with a partial pressure of ammonia of 6 atmospheres which is reduced in the absorber vessel 22 to 1.5 atmospheres before it unites with the gas entering the absorber coil 18 by the conduit 21.
Patent GB-685269-A (GB)
Title: Apparatus and process for coating a substrate with a metal
IPC: C23C14/24
Filed: 1951-02-02
Abstract: 685,269. Coating with metals. NATIONAL RESEARCH CORPORATION. Feb. 2,1951, No. 2583/51. Class 82(ii) In apparatus for coating with metal, and in particular with aluminium, by vaporization in vacuo, the crucible containing the molten metal is arranged so that its upper part is raised to a higher temperature than the body of the crucible, in order to prevent molten metal creeping out of the crucible. As shown, the vacuum chamber 10 is evacuated by a pump 14 and molten metal is evaporated from a crucible 24 surrounded with refractory and electrically insulating material. High frequency electric currents in the coil 32 heat the crucible and the closer spacing of the section 36 of the coil raises a lip 28 of the crucible to a higher temperature, increasing the rate of evaporation and thus preventing the creep of molten metal out of the crucible. A strip 20 to be coated is locatesd above the crucible.
Patent GB-686577-A (GB)
Title: Improvements in or relating to electron discharge devices
Inventor: ROGERS DOUGLAS CECIL
IPC: H01J21/20
Filed: 1951-02-02
Abstract: 686,577. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. Feb. 2, 1951, No. 2652/51. Class 39(i) [Also in Group XXXVI] In a double triode having separate cathodes, and intended for use as a grounded grid amplifier in the frequency range 50-450 Mc/s, the grids are coupled together so that with push-pull input the H.F. potential difference between them is less than half the H.F. potential difference between the two cathodes. Fig. 2 shows an embodiment designed for transmitting purposes, and operating under class C condtions, with a suitable push-pull circuit. A condenser 20 couples the two grids 4, which are taken to ground through biasing networks 21, 22. 17 and 16 are tuned input and output circuits. Fig. 5 shows a practical form of the valve, each triode section being of similar construction to the valve described in Specification 668,443. The two anode portions 37 of each triode are connected above the upper mica spacer 32 by a bridge member 39, 40. The anode connections are taken out through top caps 31, all the remaining connections passing out through the valve base. The coupling condenser is of laminated construction and is attached under the lower mica spacer 33, as at 42. Figs. 1 and 3 (not shown) are of a modified valve construction and circuit for receiving purposes, operating under Class A conditions. In this form the grids are connected directly.
Patent GB-632138-A (GB)
Title: Improvements in or relating to electric plug and socket switches
IPC: H01R13/71
Filed: 1948-01-29
Abstract: 632,138. Two-part coupiings combined with switches. COOK, C. R. Jan. 29, 1948, No. 2724. [Class 38 (i)] In a plug-and-socket switch of the type wherein the plug, when inserted, is rotatable so as to cause one or more pins to engage or disengage one or more socket contacts, the socket contacts 15, 16 comprise rigid tubes with side openings 28 for the pins 29 which are resilient and preferably of the type set forth in Specification 403,448, the edges of the openings 28 being chamfered at 33 to guide and compress the pins. The sockets together with a tubular earth socket 17 about which the plug rotates are housed in recesses 12, 13 14 in the socket base 11. A spring-loaded shutter may be provided so that if the plug is removed in the " on " position, the shutter will move to the shielding position. Means to engage the plug on movement to the " on " position to prevent its withdrawal may comprise a lug on the plug engaging a slot in the socket cover. According to the Provisional Specification the plug may be adapted to move rectilinearly.
Patent GB-649441-A (GB)
Title: Improvements in and relating to the heating of floors
IPC: F24D3/14
Filed: 1948-01-29
Abstract: 649,441. Radiators for heating buildings. HADEN & SONS, Ltd., G. N., BRUCE, H. H., and PATERSON, J. R. Jan. 29, 1948, No. 2737. [Class 64(ii)] Floor-heating apparatus embedded in a floor 14, 15 comprises fluid-heated pipes 3 located in corrugations in heat-conducting plates 1, which are arched and corrugated to a height greater than the diameter of the pipes, so that the latter, which are held in close contact with the plates by binding elements 5 or 6, lie above the plane of the lowest part of the plate, an air space or spaces being formed by the arching between the plates and that plane. The binding elements may be wires 5 or strips 6 engaging in pairs of slots at the ends of the plates. The plates may rest directly on the concrete foundation 12 or on a layer of asbestos cement or other insulating material.
Patent GB-1149326-A (GB)
Title: Sealing device
Inventor: PETRIE JAMES ALEXANDER
IPC: F16J15/34
Filed: 1968-01-18
Abstract: 1,149,326. Seals. ROLLS-ROYCE Ltd. 18 Jan., 1968, No. 2744/68. Heading F2B. [Also in Division F1] A sealing device for preventing leakage of cooling air through the axial gap between the roots of turbine stator and rotor blades 14, 21 respectively in a gas turbine engine comprises an axially movable sealing member 26 co-operating with ribs 23, 24 on the roots 22 of the rotor blades 21 and positioned according to the differential pressure across the faces of the member. The sealing member 26 is located radially by dogs 36, 37 and is sealed to adjacent stationary structure 32, 33 of the turbine by means of piston ring type seals 31, 34 to form a chamber 62 on the upstream side of the member. The downstream face of the member 26 carries spaced annular ribs 50, 51 which define restrictions 42, 43 with co-operating annular ribs 39, 40 on a disc 38 bolted to the rotor disc 15. A further restriction 45 is defined between a rib 52 on the member 26 and the periphery of the disc 38. High pressure air 56 from the engine compressor is supplied to a region 54 between member 26 and disc 38, a portion of the air then entering a passage 41 which includes the restrictions 42, 43, 45. Some of the air flows from passage 41 through drillings 63 in member 26 into the chamber 62 and is thence vented through further apertures 67 in member 26 to a chamber 60 on the downstream side of the member. Alternatively, the chamber 62 could be vented to atmosphere through a valve. The remainder of the air in passage 41 flows into the chamber 60 via restrictions 43, 45. The construction is such that should sealing member 26 move upstream, the size of restriction 42 increases thus reducing the pressure drop therethrough and increasing the pressure in chamber 62 so that member 26 moves back downstream to restore the seal at ribs 23, 24. The provision of restriction 45, whose radial width is independent of the axial position of member 26, ensures that the sealing device operates properly at starting of the engine when the member 26 may be in its extreme upstream position.
Patent GB-975612-A (GB)
Title: Ignition devices
IPC: F02P3/12
Filed: 1963-01-22
Abstract: 975,612. Ignition systems; sparking plugs. Y. NAKAMATSU. Jan. 22, 1963 [Jan. 22, 1962], No. 2779/63. Heading FIB. [Also in Division H2] An ignition device for an internal-combustion engine comprises an integral structure including spark electrodes 9, 10 and a piezo electric unit, adapted to be fitted to the combustion chamber so that the unit is subjected to mechanical pressure by the piston as shown there are two piezoelectric units 6, 7 but a single unit may be used, a switch may be incorporated in the device and a separate ignition plug may be fitted. The spring may be dispensed with. In Fig. 5 a capacitor 18 is associated with the spark electrodes 9<SP>1</SP> 10<SP>1</SP>. The changeover switch 17 is operated in association with the compressing and releasing of the piezoelectric unit to produce sparks alternately between the electrodes 9, 10 and 9<SP>1</SP>, 10<SP>1</SP>. Another changeover switch 20 and a battery 19 are provided for firing the ignition devices if the piezoelectric unit fails The device may be mounted on the piston.
Patent GB-241072-A (GB)
Title: Improvements in locks particularly adapted for use on attache and like cases
IPC: E05B65/52
Filed: 1925-01-31
Abstract: 241,072. Neville, J. Jan. 31, 1925. Hasp locks for suit, attachÚ, and like cases comprise a back plate 1 the turned-up edges 3 of which guide a catch bolt plate. 2 provided with a bevelled projection 4 and urged by one limb of a spring 10 to lie in the path of the hasp, which enters a slot 5. The other limb of the, spring bears against the edge of a transverselymovable key-operated blocking lever 6, guided on pins 8 and housed in a rectangular opening in the bolt plate 2, which also accommodates the spring 10. The lever 6 is adapted to enter a notch 9 to hold the plate 2 against hand-operation, or to be moved clear of the notch to release plate 2, accidental movement being prevented by the curved end of spring 10 engaging one or other of two notches 12 in the lever. The lever also serves as a stop to limit movement of the catch plate 2 under action of the spring. The spring 10 is held by curved projections 13 pressed up from the back plate 1 and embracing the bend of the spring. The plate 2 is operated to release the hasp by a finger-piece slidable over the face plate of the lock and riveted &c. to the back plate. This finger-piece is provided with a keyhole shaped so that the key can be inserted either way up, the key being formed to engage and rotate on a pin 15 rising from the centre of a circular depression in the back plate. The parts of the lock are formed from a single thickness of sheet metal, the corners 18 of the back plate being depressed to lie flush against a face plate (not shown) to which they are riveted, and the back plate may have pressed-out tags 19, Fig. 4, for attaching the lock to the attachÚ &c. case.
Patent GB-1446846-A (GB)
Title: Sound reproducing apparatus
IPC: H04R1/28
Filed: 1973-01-19
Abstract: 1446846 Loud-speakers L LATIMERSAYER 6 Nov 1973 [10 Nov 1972 11 Dec 1972 19 Jan 1973] 51918/72 57030/72 and 2804/73 Headings H4J and H4X A variable transmission line loud-speaker has a bass radiator (not shown) on the front face 13 coupled by a chamber and four-section transmission line to a port 15 or alternatively to a port 26 when a flap is moved to open that port and isolate the last section 20d of the line from the third section 20c. The flap may be coupled to another flap so that when the port 26 is operative the port 15 is closed but the final section 20d is coupled to the chamber so that the bass radiator is presented with the same enclosure volume. Treble radiators are mounted on the front and rear faces to enable the loud-speaker to be used as a normal frontal radiator or to face a wall and be used in the omni-directional mode.
Patent GB-1024523-A (GB)
Title: Headers for heat exchangers
Inventor: BUCKLEY RONALD LANCE
IPC: F28F9/02
Filed: 1964-01-22
Abstract: 1,024,523. Heat exchangers. SERCK RADIATORS Ltd. Dec. 11, 1964 [Jan. 22, 1964], No. 2825/64. Heading F4S. A heat exchanger header includes a tank part 10 and a tube plate 11 having correspondingly inclined edge portions 10a, 11b which are secured together in face-to-face contact. The two portions shown are separately coated with solder then brought together and heated, any surplus solder forming a bead 13 in a channel 11 on the tube plate edge.
Patent GB-178917-A (GB)
Title: Means for transforming light impulses into electric current impulses
IPC: H01J40/00
Filed: 1921-01-21
Abstract: 178,917. Nakken, T. H. Jan. 21, 1921. Vacuum tubes.-Ultra-violet or other light rays are caused to control the electron flow through a thermionic device, thereby generating or regulating electric currents in circuits associated with the device, or modifying the amplitude of radiofrequency oscillations generated by it. In its simplest form, the actino-thermionic relay consists of an incandescent electron-emitting filament 2, Fig. 1, and a plate 3 composed of a metal that has the property of emitting electrons when exposed to light, such as a hydride or amalgam of the alkaline metals. Both elements are enclosed in a transparent or translucent bulb 1 which may either be fully exhausted or filled with rarefied neutral gas such as helium, argon, &c. The normal potential of the plate 3 is determined by the steady electron-emission from the filament, but drops instantaneously with the impact of light, and is similarly restored when the light is shut off, without lag or inertia effects. A plurality of filaments and actino-electric bodies may be enclosed in the same bulb. In order to augment and control the electron flow, a positively-charged grid 12 may also be inserted as shown in Fig. 3, and connected to the filament by an external circuit comprisng a high-resistance leak 14 shunted by a condenser 15. Also the magnetic field from a solenoid may be used as a control. In a modified form, the light-sensitive plate is perforated and itself acts as a control grid for another plate or anode to which a steady high potential of 40-100 volts is applied from a battery. In such arrangements, the light-sensitive grid 3 may be located at some distance from the filament, as shown in Fig. 7, and be connected metallically with a spiral grid 18, preferably made of metal having a high fusing-point. The grid 3 may be made in the form of a concave mirror in the focus of which is placed another metal plate or electrode 20. The various elements are preferably connected to external terminals 4, 5, 6, 17, 26, 27 by means of which the internal circuit of the electron flow may be varied to secure different control effects. Fig. 8 shows an arrangement in which the light-sensitive body 3 in the form of a film on the inner wall of a U-shaped tube is shielded by plates 28 from the light rays emitted by the incandescent filament 2. The charged control grid is shown at 12, and the necessary deflexion of the electron stream from filament to body is effected by an external solenoid winding 29.
Patent GB-396387-A (GB)
Title: Improvements in or relating to electro-acoustic devices
IPC: H04R1/30
Filed: 1932-02-01
Abstract: 396,387. Loud-speakers &c. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.- (Assignees of Blattner, D. G. ; 112, Laurel Hill Road, Mountain Lakes, New Jersey, U.S.A.) Feb. 1, 1932, No. 3007. Convention date, Feb. 5, 1931. [Class 40 (iv).] Relates to loud-speakers and the like provided with a horn and comprising a diaphragm which has a rigid dished central portion surrounded by an annular ridge portion and a flexible marginally clamped outer portion. According to the invention, there is provided a throat member having its inner surface adjacent to and conforming to the dished central portion and the annular ridge portion of the diaphragm, so as to form a substantially uniform air space between the throat member and the diaphragm. The invention is shown as applied to a moving-coil loud-speaker, in which the diaphragm, having a dished central part 17, a ridge portion 18, and a flexible portion 19, is secured between a throat member 24, communicating with a horn 25, and the annular pole piece 15 of the magnet system. A coil 26, which may consist of a ribbon wound edgewise, is secured to the junction of the parts 17, 18 of the diaphragm, and projects into the annular air gap between the pole piece 15 and the central polepiece 12. The clearance between the diaphragm and the inner surface of the throat member, which, as shown, conforms to the shape of the diaphragm, is made as small as is feasible to make the stiffness of the air chamber as great as possible whilst allowing sufficient space for the required maximum movements of the diaphragm. Leads for the coil are connected to bolts 27, insulated from the flange 22 of the throat member and threaded to terminal blocks 28. In a modification, the coil 26 is attached to the outer edge of the portion 18 of the diaphragm. Fig. 3 shows a further construction, in which the diaphragm has stiff dished portions 29, 30, a flexible corrugated portion 31, and a flat part 32 which is clamped between the pole piece 33 and the flange 34 of the throat member. A diagram is given, showing by an electrical circuit analogy that the elements of the loudspeaker system comprising the diaphragm mass, the diaphragm edge stiffness and the effective stiffness of the throat chamber constitute a selective network of the band-pass filter type, with terminating impedances provided by the mechanical motional resistance of the coil and the horn load impedance. For uniform transmission throughout the band, the terminating impedances are made equal to the characteristic impedance of the filter. The upper cut-off frequency may be so chosen that the contraction of the sound field with increasing frequency is compensated for at points on the axis of the horn, i.e. a substantially uniform pressure for both high and low frequencies at points on the axis of the horn may be obtained. Formulae are given whereby, for given cut-off frequencies and terminating impedances, the required values of the diaphragm mass and the stiffnesses may be determined.
Patent GB-715379-A (GB)
Title: Improvements in or relating to automatic flight control systems and automatic pilots
IPC: G05D1/00
Filed: 1949-12-01
Abstract: 715,379. Automatic flight control systems. SPERRY CORPORATION. Dec. 1, 1949 [Dec. 1, 1948], No. 3019/53. Divided out of 715,313. Drawings to Specification. Class 38(4) The subject-matter relates to a flight control system using a level platform carrying earth-reference-devices and operating substantially as described in Specification 715,313, but the claims differ. Specification 715,312 also is referred to.
Patent GB-246878-A (GB)
Title: Improvements in and relating to composite metal articles
IPC: H01H11/04
Filed: 1926-02-02
Abstract: 246,878. British Thomson-Houston Co., Ltd., (Assignees of Basch, D.), and Gerhart, G. B. Feb. 2, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Dynamo-electric machines; electric fittings. - Articles of cupreous metal such as parts of electrical disconnecting switches, Fig. 2, conductor bars with end rings &c. are made by uniting wrought metal to cast metal by a layer or alloy. Two rolled members 1, 2 may be forged together, cold, as shown in Fig. 1, and then tinned at 3 with solder which may comprise equal parts of lead and tin. The members are then placed in a mould and copper or copper alloy 4, Fig. 2, is cast on. Similarly end rings may be cast on the tinned ends of copper conductor bars.