baber/WOPTO huggingface dataset:
Patent GB-747990-A (GB)
Title: Thread-carrying looper for two-thread chain-stitch sewing machine
IPC: D05B57/02
Filed: 1954-08-26
Abstract: 747,990. Sewing- machines. SINGER MANUFACTURING CO. Aug. 26, 1954 [Aug. 28, 1953], No. 24840/54. Class 112. Chain stitching.-A looper for a chain-stitch sewing-machine comprises a blade which has a free extremity and which is formed with a transverse eye for delivering thread from one side of the blade to the other side, the blade also being formed with a thread-guarding groove extending away from said free extremity from a point adjacent the delivery end of said eye. A pointed blade 33 is joined by a heel 34 to a base 30 provided with a stud 31 for mounting the looper in its carrier. The heel is formed with a thread-grinding eyelet 35 communicating with a thread-guiding groove 36 formed in the front face of the blade and ending in an eye 37 passing transversely through the blade. The rear face of the latter is formed with a thread-guarding groove 39 extending from adjacent eye 37 towards the heel and situated lower than groove 36. A short groove is also formed in the rear face extending substantially vertically from eye 37. The purpose of the thread-guarding groove is to prevent the looper thread being carried under the blade by the loop of needle thread when the latter is being tightened. The loopercarrier 20 is pivoted on a stud 21 carried by a rock-shaft 22 oscillated, for imparting needleavoiding movements to the looper, by the strap 28 of an eccentric 27 mounted on the main bed shaft 18. A crank 23 on shaft 18 is coupled by means of a pitman 24, bell-crank lever 25 and link 26 to the carrier 20 for imparting loop seizing and shedding movements to the looper.
Patent GB-1240426-A (GB)
Title: Hydraulic clutch
IPC: F16D25/0638
Filed: 1970-05-22
Abstract: 1,240,426. Friction clutches. NISSAN JIDOSHA K.K. 22 May, 1970 [28 May, 1969], No. 24899/70. Heading F2C. To prevent idle drag due to centrifugal pressure of residual oil in the pressure chamber B of an hydraulically-applied multi-disc friction clutch 10, 11 when a fluid source 20 delivering through passage 5 is cut off, the engaging piston 4 has an exhaust passage 15 passing therethrough which is opened by centrifugal force acting on a frusto-conical valve element 17 which is normally held in position closing the passage by clutch-apply pressure. The valve element 17 is positioned in an enlargement of passage 15 and retained therein by an apertured cup 18 which may be slotted over its length. The element may abut an annular valve seat formed integral with the piston or formed on a separate insert, Figs. 5A and 5B (not shown). Again, the insert may be a plain steel washer, Fig. 5C (not shown). By varying the diameter, height, taper or material of the element 17, the clutch may be variably controlled.
Patent GB-763449-A (GB)
Title: Improvements relating to gas turbine engine fuel systems
Inventor: MORLEY FREDERICK WILLIAM WALTO
IPC: F02C7/224
Filed: 1953-09-09
Abstract: 763,449. Gas-turbine plant. ROLLS-ROYCE, Ltd. July 29, 1954 [Sept. 9, 1953], No. 25017/53. Class 110 (3). [Also in Group XXXIV] A gas-turbine fuel system comprising a fuel pump system adapted under some conditions at least to deliver a quantity of fuel in excess of engine requirements and a by-pass to convey the excess fuel directly or indirectly to the inlet side of the fuel pump system has a heat exchanger, through which the engine lubricating oil is passed, connected to the delivery side of the fuel pump system so that the whole or part of the excess fuel passes through it. In the arrangement shown, Fig. 1, fuel from a tank 13 is supplied by a booster pump 14 to a main engine driven positive displacement fuel pump 10 which discharges through a control valve 16 to the gas turbine. The fuel pressure upstream of the valve 16 is maintained by a relief valve 20 and the excess fuel not required by the engine is by-passed back to the tank through ducting 17. A heat exchanger 18 in which lubricating oil is cooled is connected in the delivery pipe 15 of the pump 10 upstream of the ducting 17 so that the full delivery of the pump 10 passes through the heat exchanger. In a modification the heat exchanger 18 is connected in the ducting 17. In another modification, Fig. 3, which comprises a fuel system as described in Specification 763,448, an additional fuel pump 11, driven by an air turbine 21 is provided. This system is arranged so that in the low-speed range the output of the pump 11 is by-passed and in the high-speed range the output of the pump 10 is by-passed. The heat exchanger 18 is arranged in the by-pass ducting 17. In a modification of this arrangement only the fuel from the pump 10 is by-passed through the heat exchanger 18, the excess fuel from the pump 11 being by-passed through a duct 17A direct to downstream of the heat exchanger. An additional duct 17B with an orifice 22 may also be provided to ensure a fuel flow through the heat exchanger.
Patent GB-288657-A (GB)
Title: Improvements in or relating to cellulosic materials, and products obtained therefrom
IPC: C08B1/02
Filed: 1926-10-08
Abstract: 288,657. British Celanese, Ltd., Dreyfus, H., and Haney, C. I. Oct. 8, 1926. Cellulose acetates and other esters; preparatory treatment of cellulose.-Cellulosic materials are rendered more easily esterifiable by treatment with small quantities of liquid formic acid, preferably of 70-90 per cent strength. The acid is evenly distributed over the material, for instance, by spraying, the material being moved from time to time if necessary; 10-20 parts of the acid for every 100 parts of cellulose are suitable proportions. Operating in this manner it is not necessary to subject the material to an after-treatment for the removal of the formic acid before proceeding to acetylation &c., and there is only a small loss of acetic anhydride due to reaction with the small quantity of formic acid remaining in the cellulose. After moistening with the acid, the materials are allowed to stand. The material treated mav be mercerized or unmercerized cotton cellulose, or wood pulp, the latter having been preferably first pretreated with alkali in the manner described in Specification 249,173; and it may contain the usual amount of moisture, or may be dried. Specifications 6463/15, 14101/15, 100,009, 101,555, 207,562 and 263,938 also are referred to.
Patent GB-1545327-A (GB)
Title: Metallic container and method for making the same
IPC: B21D51/30
Filed: 1977-06-15
Abstract: A first quantity of a sealing material (S1) is applied to the lid flange (1a). After the first quantity of the sealing material (S1) has set to a predetermined degree, a flange (2a) of a container body (2) is placed on the layer thus formed. A second quantity of a sealing material (S2) is then applied in an area adjoining the first quantity of the sealing material (S1), the two flanges being beaded together. The introduction of a layer of sealing materials between the adjacent metal parts of the flanges allows certain sliding movements of adjacent local areas of the flanges without compromising the leaktightness of the latter. <IMAGE>
Patent GB-1124145-A (GB)
Title: Improvements in dual spring seals
Inventor: MAYER JOHN FREDERICK
IPC: F16J15/08
Filed: 1966-06-06
Abstract: 1,124,145. Joint-making packing. NORTH AMERICAN AVIATION Inc. 6 June, 1966, No. 25160/66. Heading F2B. A seal 10 for preventing leakage between fixed parts 1 and 2 of a rocket comprises side walls 12a, 12b extending from a base portion 18, and one or more passages 15 to allow flow of fluid from between sealing surfaces 11a 17a on one side of the seal to between sealing surfaces 11b, 17b on the other side. The sealing surfaces may be formed by machining the base material of the seal, but preferably they are formed by a coating of copper or P.T.F.E. The seal is clamped in position by bolts 4 which pass through bolt holes 16 in a portion 19 which serves as a spacer. Leakage of fluid past the sealing surfaces 11a 11b which act as the primary sealing surfaces, may be detected through a port 50. Seals 20, 30 constructed according to the invention are provided between fixed parts 2, 3, any leakage past the primary sealing surfaces being detectable through ports 51, 37, 38. If desired, the sealing surfaces 17a, 17b may be provided on the spacer 19 instead of on the base portion 18 and the bolt holes used to interconnect each side of the seal. In another embodiment, the spacer 19 and grooves 14a, 14b are omitted.
Patent GB-1165051-A (GB)
Title: Watchman Location System.
Inventor: ASHLEY JOHN RAYMOND
IPC: G07C1/20
Filed: 1967-05-31
Abstract: 1,165,051. Watchman-location system. HORSTMANN GEAR CO. Ltd. 6 March, 1968 [31 May, 1967], No. 25199/67. Heading G4T. A watchman-location system comprises a mobile radio transmitter having a loop aerial to detect a carrier frequency from a number of generators located at individual check-points, each generator modulating its signal with a characteristic location frequency, and having a demodulator which passes a detected location frequency to a carrier-wave continuously transmitted by the transmitter, a remote receiver tuned to the carrier-wave and having filters corresponding to each location frequency which operate a respective relay to light a lamp on receipt of the appropriate frequency. An illuminated lamp remains alight until another relay is operated. The transmitter may be a V.H.F. transmitter.
Patent GB-1533312-A (GB)
Title: Stepping motors
IPC: H02K7/106
Filed: 1976-06-17
Abstract: 1533312 Motor driving arrangements VDO ADOLF SOHINDLING AG 17 June 1976 [18 June 1975 29 Aug 1975] 25207/76 Heading H2A A stepping motor with a rotor 2 on a shaft 1 has an inertia mass 6 which is mounted to be independently rotatable on the shaft 1, the inertia mass 6 being magnetically coupled to the rotor 2 and thereby acting to damp the natural oscillations of the rotor after each step. The rotor 2 may be a permanent magnet and the inertia mass 6 may include material of high hysteresis.
Patent GB-747742-A (GB)
Title: Improvements in or relating to crankshafts for small internal combustion engines
IPC: F16C3/12
Filed: 1953-09-12
Abstract: 747,742. Crankshafts. TAPLIN, H. J. Sept. 6, 1954 [Sept. 12, 1953], No. 25265/53. Class 80(2) A crankshaft for a two or more (as shown, four) cylinder internal combustion engine comprises shaft parts 23 ... 26 with integral crank discs 29, 30, 31, &c., at least one of the crank discs, such as the disc 31, having a crank pin 32 integral therewith or a press fit therein and received in a hole in the adjacent crank disc 33. The construction of the crankshaft is such as to allow solid big ends to be used.
Patent GB-863579-A (GB)
Title: Improvements in and relating to apparatus for controlling and, in particular, keeping constant the pressure in a pressure transmitter in hydraulically operating machinesfor testing materials
IPC: G05D16/18
Filed: 1957-08-12
Abstract: 863,579. Fluid-pressure servomotor control systems; hydraulic machines. MASCHINENFABRIK AUGSBURG-NURNBERG A.G. Aug. 12, 1957 [Aug. 25, 1956], No. 25349/57. Classes 69 (2) and 135. [Also in Group XIX] Apparatus maintaining constant pressure in the pressure transformer 2 of an hydraulic materials testing machine 1 receiving pressure via 4 from a regulable pump 5 has a regulating member 6 acted on by a constant force, e.g. weight 32, and by a device 22 in which the volume changes in dependence on the rate of supply of pressure medium to the device via 20, which rate depends on the pressure in the transformer. Line 20 leads past a spring-loaded valve 26 to the piston and cylinder 22 operating the regulating member 6 and then to sump 11 via throttle 35. Any variation in pressure beneath the plunger 1 loading the test material 3 alters the opening of valve 26 and the flow and pressure in cylinder 22.
Patent GB-234368-A (GB)
Title: Improvements in valve controlling devices for internal combustion engines
IPC: F02D1/00
Filed: 1924-10-24
Abstract: 234,368. Diamant, S., and Scotti, C. Oct. 24, 1924. Valve gear; regulating.-Valve gear comprises rotary arms R engaging curved shoes composed of members A, B pivoted together at D and adjustable about the. pivot so as to vary the curvature and position of the shoes in accordance with the speed. The members A, B are shown as formed on levers A<1>, B<1> respectively, the distance apart of these levers being varied, for adjusting the curvature of the shoe, and therefore the timing of the valves, by a cam F<1> acting against a spring G. The valve-actuating lever C, C<1> is loosely mounted on the cam shaft E and supports the pivot D by the aid of a balancing- spring S, a projection C<11> on the lever engaging the valve stem V.
Patent GB-999349-A (GB)
Title: A method and apparatus for forming large sized bubbles in a molten fluid bath
IPC: C03B5/193
Filed: 1963-06-26
Abstract: <PICT:0999349/C1/1> <PICT:0999349/C1/2> To homogenize molten glass by bubbling gases therethrough, each bubbler is provided with a plurality of openings closely adjacent to each other so that gases injected simultaneously through the openings into the molten glass will coalesce while attached to the outlet to form a large-size bubble, which is released therefrom as a single unit.  The large number of small openings prevent the molten glass from entering the bubbler if the pressure is reduced. As shown in Fig. 2, air is pumped from pipe 11 through a bubbler 10 having a number of circular holes 13 in the form of a cross in an outlet end 12, which has a concave top surface 14 to aid in the formation of a large bubble.  A number of other arrangements of openings using circular holes or rectangular slots are disclosed, such as that in Fig. 10, in which the bubbler 710 has slots 713 outside holes, the top surface of the bubbler being flat.
Patent GB-1278037-A (GB)
Title: Improvements in or relating to machine tools
IPC: B24B49/16
Filed: 1970-05-27
Abstract: 1278037 Grinding AUTOMOBILES CITROEN SA 27 May 1970 [30 May 1969] 25466/70 Heading B3D A machine tool, such as a honing or lapping machine having expanding or non-expanding tools, comprises means 8, 9 for reciprocating a mounting 1 for a spindle 2 carrying a tool 3, a torque resistance detector 4 between the spindle and tool, and reversing means 10 operatively connected between the detector and reciprocating means to reverse the direction of movement of the mounting whenever a predetermined fall in torque resistance occurs within a predetermined period of time. The mounting is reciprocated in a support (not shown) by the means 8, 9, in the form of an hydraulic double-acting ram, and the torque detector 4 between the spindle and tool consists of a device for varying the cross-section of a pipe 5 connected by a flow limiter 7 to a compressed air source 6, the pressure in the pipe varying inversely to the increase in torque resistance. The ram is controlled by a distributer 10 which is operated by an electronic flip-flop 12, in turn, operated by electrostatic contacts 13 which co-operate with a capacitor element 14 secured to the mounting 1. The pipe 5 is connected to one side of a pressure capsule 17, the other side of which is connected to a plate 18 which co-operates with a nozzle 19 secured to a diaphragm 20 between chambers 21, 22 connected to a compressed air source 23. Chamber 22 is connected by a regulator 26 to atmosphere and chamber 21 is connected to the nozzle 19 through a regulator 28. The nozzle is also connected by a pipe 29 to a pressure capsule 30 which operates a switch 31 controlling an electronic flip-flop 32 linked to the contacts 13 so as to send a priority signal to the flip-flop 12. Upon a reduction in torque upon the tool, the increase in pressure in pipe 5 moves plate 18 away from the nozzle 19. If the change in pressure is slow, the nozzle follows the plate and no action occurs; if the change is rapid, a pressure drop occurs in nozzle 19 and actuates the capsule 30 to cause the flip-flop 32 to actuate flip-flop 12 and hence distributer 10 to reverse the direction of movement of the tool. In another embodiment, a differential contractor controls the flip-flop 32. In a further embodiment, the signal from pipe 5 is amplified by a fluid amplifier and actuates a pneumatic trip in the circuit to the flip-flop.
Patent GB-1469809-A (GB)
Title: Non-lethal expanding projectile
IPC: F42B12/74
Filed: 1974-06-07
Abstract: 1469809 Non-lethal projectiles RHEINMETALL GmbH 7 June 1974 [9 June 1973] 25474/74 Heading F3A A non-lethal projectile which on impact spreads and produces a relatively low energy per unit area, comprises a casing 1 which is stable in flight and which can be upset or deformed on impact with a target and which has a deformable filling 3 of high specific gravity. The casing comprises a soft plastics material such as polyethylene and is formed with longitudinal grooves to produce spreading from predetermined positions. A hand plastics base 2 is friction welded to the casing. The filling 3 comprises powdered or granular lead or a heavy metal powder to which has been added a plastic binding agent or a rubber compound.
Patent GB-1490101-A (GB)
Title: Artificial and natural structures
IPC: E04G23/02
Filed: 1975-09-08
Abstract: 1490101 Repairing structures or roads BALFOUR BEATTY Ltd 8 Sept 1975 [7 June 1974] 25501/74 Addition to 1399510 Headings E1G and E1S [Also in Division Dl] A structure, e.g. a building or road, having cracks or pores therein is repaired by the introduction of a hardenable material in a liquid or semi-liquid state, the method comprising fitting over the surface of the structure a fluid-impermeable flexible covering 1, 11 having a continuous hollow wall 2, 12 adjacent its boundary edges, sealing the boundary edges of the covering or hollow wall to the structure to form a fluid-tight enclosure, evacuating air from the hollow wall 2, 12 and from the cracks or pores adjacent the covering, and admitting the hardenable material into the evacuated cracks or pores. The hollow wall 2, 12 may be integral with the covering or may be made up from pre-formed channellike members; in the latter case, the wall 2 (Fig. 2) may be placed under the covering 1 slightly spaced from its edges, which are sealed to the structure at 5, or the wall 12 (Fig. 3) may be placed over the edges of the covering 11, and has sealing strips 15. Air is evacuated through outlets 13 in the hollow wall, whilst material is introduced through inlets 4 in the covering.
Patent GB-430325-A (GB)
Title: Improvements in and relating to electric converting apparatus
IPC: H02M1/04
Filed: 1933-09-14
Abstract: 430,325. Converting. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Bedford, B. D. ; 421, Summit Avenue, Schenectady, New York, U.S.A.) Sept. 14, 1933, No. 25502. Void [Abridged as open to inspection under Sect. 91 of the Acts, March 15, 1934]. [Class 38 (ii)] Relates to a converting arrangement in which A.C. and D.C. mains 11, 10, Fig. 1 are interconnected through valves 15, 16 and a transformer 12 and consists in providing an additional grid controlled valve 17 connected to the neutral of the transformer for the purpose of power factor improvement. Regulation of the voltage is obtained by means of a phase shifting transformer 22 to which the grids of the valves 15, 16 are connected. Considering inverter operation with the control potential on the grids advanced to raise the output voltage. Commutation takes place at point b, Fig. 4 diagram II with the result that reverse current flows, represented by the shaded area below the axis. Normally this current passes through the transformer winding and lowers the power factor. To avoid this the valve 17 is rendered conductive at the point b so that this current passes through the valve and not through the transformer, so that the power factor is improved. The arrangement functions similarly when operating as a rectifier. The valve 17 is controlled by a voltage having a frequency twice that of the A.C. circuit 11. This is obtained by means of a transformer 24 and rectifier 27 fed from a phase shifting transformer 25. The transformer 24 may be designed to saturate to obtain peaky wave potential. In a modification two additional valves are provided the grids of which are controlled with potential 180‹ out of phase and of the same frequency as the A.C. circuit. In a modification comprising a 6-phase arrangement with an interphase choke, the two valves are connected one on either side of the choke. Instead of separate valves a single multi-anode vessel may be used. In addition, a further set of anodes are provided fed from tappings on the transformer. When operating as a rectifier, a double range of voltage is obtained by means of this. On the lower voltage range the anodes connected to the higher voltage tappings are blocked and the anodes connected to the low voltage tappings controlled on the high voltage range, the anodes associated with the low voltage tappings are fully conducting and the anodes connected to the high voltage tappings are controlled. When operating as an inverter the order is reversed. The invention is also applicable to a frequency changer comprising an inverter connected to a rectifier.
Patent GB-675997-A (GB)
Title: Improvements in and relating to electric discharge devices
IPC: H01J21/06
Filed: 1948-09-30
Abstract: 675,997. Thermionic valves. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 30, 1948 [Oct. 1, 1947], No. 25504/48. Class 39 (i). In a high-frequency tetrode the control grid is conductively connected via an annular disc 13 to a hollow annular metallic structure 8, 1, which encloses and is capacitatively coupled to the annular disc support 14 of the screen grid 17 so as to form a condenser built into the device. The screen grid support 14 is held in spaced relation to the surrounding structure 1, 8 by grommet-like insulators 15, 16 and insulating discs 18, 19 held by pins (not shown) in member 14; the insulators 15, 16, 18, 19 also serve as dielectric for the condenser. The screen grid lead passes through an insulating seal in the enclosure formed by members 1, 8, as shown. The envelope of the device is formed by copper members 1, 8, glass members 3, 9, and ironnickel-cobalt alloy sealing rings 4, 5, 11, 12; the device is preferably assembled from two halves, members 1, 8 being subsequently welded together. The anode 2 has an iron support 6 and a copper disc face 7. The grid structure 1, 8 is grounded in operation. A prior art tetrode is referred to in which the screen grid is brought out via a disc seal and a section of transmission line is attached to the disc and tuned by a plunger to give zero impedance between the screen grid and control grid.
Patent GB-690227-A (GB)
Title: Improvements in or relating to drums or like containers
IPC: B65D51/16
Filed: 1949-10-05
Abstract: 690,227. Hollow-ware; stoppers; metal drums &c. DAVIES, Ltd., T., and EDGE, N. R. Oct. 4, 1950 [Oct. 5, 1949], No. 25564/49. Classes 21, 66 and 125(iii) Metal drums having dished ends are provided with vent holes, such as 16, to prevent internal and external pressure differences drawing water into the drums, the holes being surrounded by an area of increased thickness of metal or by a bush. The invention is applicable to the drums described in Specification 380,251 but the drum shown has the additional feature that the edge 19 of the cap 14 when in place, is above the level of the beading 12 so that water accumulating in the dished end will not rise above this edge 19.