baber/WOPTO huggingface dataset:
Patent GB-627837-A (GB)
Title: Improvements in or relating to steam power plants provided with feed water preheaters and feed water accumulators
IPC: F01K7/40
Filed: 1946-02-25
Abstract: 627,837. Feedwater heating systems. SULZER FRERES SOC. ANON. Feb. 25, 1946, No. 5806. Convention date, March 23, 1945. '[Class 64(i)] [Also in Groups XXVI and XXIX] In a steam power plant with a feedwater accumulator and a multi-stage feedwater heating system in which the feedwater, after being heated at one stage by steam in quantity automatically dependent on a factor in the working condition of the accumulator is heated in the last stage to the accumulator temperature by steam in quantity automatically dependent on a working factor in the plant, the quantity of steam given up to the prime mover, e.g. a turbine, is automatically altered when, and in the same sense as, the quantity of steam used in the preheating of the last stage is altered. In the form shown, in which steam from a boiler 1, after driving a multi-stage turbine 4, is condensed in a condenser 8, the condensate is passed by a pump 9 either to the bottom of a feedwater accumulator 11 without re-heating or, by means of a pump 12, to a cascade 16 in the steam space 17 at the top of the accumulator, through heat exchangers 13, 13a, which are heated by tapped steam from the turbine. Fresh steam supplied from the pipe 2 to the steam space 17 is condensed by the cascade of water and heats it to its final temperature. The supply of fresh steam to the accumulator and of tapped steam to the heat exchanger 13a are controlled by valves 21, 24 which are operated by servomotor systems 32, 34 and 40, 41 responsive to steam pressures respectively in the fresh steam pipe 2 and in the pipe 23 supplying the exchanger 13a. The flow of water through the heat exchangers 13, 13a is controlled by a servo-motor system 43, 45 responsive to the pressure in the steam space 17. Changes in this flow will result in changes in the steam pressure in the pipes 23, 26, 27 and consequently affect the operation of the valve 24 and the supply of steam to the exchanger 13a. If the steam pressure in the space 17 rises sufficiently, the valve 15 is opened wide enough for the pump 12 to take the unheated water from the bottom of the accumulator and pass it through the heat exchangers, so that the amount of heated water in the accumulator increases. A pipe 30 containing a safety valve 31 connects the steam space 17 to the condenser 8. A valve 3 controlling the steam supply to the turbine 4 is operated by a servo-motor system 35, 37, 38 controlled by the governor 6. The valves 3, 21 are linked by levers, so that opening and closing of the valve 21 results in opening and closing of the valve 3 in a predetermined ratio, but not vice versa. The pumps 12 and valve 15 may be replaced by a three-way or other valve controlled by the servo-motor system 43, 45. The valve 24 may also be subject to control by the governor 6, to meet a sudden demand for steam, and the valve 3 to a regulator which prevents the boiler pressure from falling too low.
Patent GB-540096-A (GB)
Title: Manufacture of chlorides of carboxylic acids of high molecular weight
IPC: C07C51/60
Filed: 1940-04-01
Abstract: 540,096. Carboxylic acid chlorides. SOC. OF CHEMICAL INDUSTRY IN BASLE. April 1, 1940, No. 5813. Convention date, April 15, 1939. [Class 2 (iii)] Chlorides of carboxylic acids of high molecular weight are made by causing phosgene to act on a carboxylic acid of high molecular weight at a temperature exceeding 100‹C. in the presence of a small proportion of a tertiary amine or a salt thereof. The carboxylic acids may belong to the aliphatic, cycloaliphatic, aromatic and mixed aliphatic-aromatic series. Acids mentioned include lauric, myristic, palmitic, stearic, arachic, oleic, chlorostearic, naphthenic and resin acids ; also naphthoic acid and aromatic carboxylic acids having in the nucleus or in a substituent an aliphatic residue of high molecular weight. Tertiary amines mentioned include the pyridine bases, quinoline, trimethylamine, triethylamine, dimethyl-cyclohexylamine, and dimethylaniline. In examples (1) Phosgene is passed into melted stearic acid at 140‹-150‹C. (2) Phosgene is passed into the hardened fatty acid of blubber. Specification 401,643 is referred to.
Patent GB-589579-A (GB)
Title: Improvements relating to ophthalmic lens testing instruments
IPC: G01M11/02
Filed: 1945-03-08
Abstract: 589,579. Optical apparatus. AVIMO, Ltd., STEVENS, H. C. M., and BURN, D. J. March 8, 1945, No. 5813. [Class 97 (i)] In an opthalmic lens-testing instrument, consisting of a frame having an adjustable stage for the lens to be tested, placed between two coaxial optical systems, one of which includes a graticule and eyepiece with associated scale and the other of which includes a target viewed through the eye-piece and axially adjustable in its system, said adjustment being indicated on a scale, an optical system is provided in the frame to project an image of the scale into the eyepiece. As shown, the frame a carries an eyepiece p, graticule r, objective q and a semitransparent reflector x, coaxial with a system comprising lenses e, f and an axially adjustable target h. The lens under test is supported against the front d of the tube 2 by parts b, c which are adjustable and of which the part c constitutes the clamp. The target h is carried by a sleeve g having a rack i engaging a pinion k meshing with a pinion t, the spindle of which carries a graduated disc r, forming the target scale. Light from a lamp n mounted on the frame is doubly reflected by a prism o to pass through the two coaxial systems and the interposed lens under test so that the target is visible in the eye-piece. The light from lamp n also passes through an aperture u<1> in a screen u on to scale r and thence to a lens v, placed at its focal distance from scale r, and is reflected at w and x into the eye-piece. Hence, when the target is moved to bring it into focus in the eye-piece, the reading on the scale r also can be seen through the eye-piece.
Patent GB-901376-A (GB)
Title: Improvements in or relating to shock absorbers
IPC: B60G17/044
Filed: 1959-02-19
Abstract: 901,376. Hydraulic dampers; road vehicle undercarriages. RECHERCHES ETUDES PRODUCTION. Feb. 19, 1959 [Feb. 22, 1958], No. 5816/59. Classes 108(2) and 108(3). In a piston and cylinder type hydraulic shock absorber, the action of the shock absorber is softened by a groove 16, Fig. 1, in the wall of the cylinder I which by-passes the working end of the piston 2, whilst the piston is in the middle of its working range. The cross-sectional area of the groove 16 may be adjusted by turning a plug 20 which protrudes into the groove. When the end of the piston 2 moves beyond the range of the groove, oil flows from one side to the other of the piston through the valve chamber 9, and passages 10, 11. In a second embodiment which is applicable to a telescopic type of shock absorber rather than the lever operated kind illustrated in Fig. 1, two bores 28, 29, Fig. 2, connect the face of the piston 2 with the side of the piston adjacent the groove 16. These bores extend the range of action of the grooves 16, the softening effect being partially controlled by the size of the orifice 32.
Patent GB-1431011-A (GB)
Title: Insect screens for caravan and domestic use
IPC: E06B9/52
Filed: 1973-02-06
Abstract: 1431011 Screens C A BEARD 9 Aug 1973 [6 Feb 1973] 5819/73 Heading E1J An insect screen comprises a net 3 and a tape 4 having portions 5, 6 around the net and a window opening respectively, the portions being securable together by manual pressure. The tape portions comprise hooked and looped material or press studs. Portion 6 is secured by pressure sensitive adhesive. The net is of PVC-covered fibreglass.
Patent GB-491220-A (GB)
Title: Improvements in or relating to antenna systems for radio receiving systems
IPC: H01Q5/48
Filed: 1937-02-26
Abstract: 491,220. Wireless receiving systems. AMY, E. V., and ACEVES, J. G. Feb. 26,1937, No. 5857. [Class 40 (v)] An antenna comprising a doublet is capable of acting as a dipole for short wave reception and as a T-aerial for long wave reception. Interference may further be neutralized by the combination of the two systems. The Figure shows the two halves 1, 2 of a doublet, which may not be equal, and are connected to a twisted symmetrical lead-in 5, 6, connected to the closely coupled coils 7, 8, forming the primary of a transformer. The secondary winding 9 is connected at one end to point 0 and to the earth terminal 15 of the receiver bv way of inductance, resistance and capacity 11, 12, 13. The other end of 9 is connected to the aerial terminal 14 and by way of condenser 10 to coil 8. Due to the dipole action or the use of asymmetrical branches circulating currents are produced in 7 and 8 and induce voltages in 9 which are supplied to the set. Due to the action of the aerial and leads as a T antenna, currents flow in the same direction in 7, 8 and produce no voltage in 9 ; if resistance 12 is not zero however, a voltage will be supplied to the receiver. Local interference may be neutralized by suitable adjustment of the inductance, resistance, condenser combinations 11, 12, 13, interference voltages picked up on the down lead concelling those picked up by the doublet, with only a small reduction in signal strength. Figs. 2, 3, 4 (not shown) illustrate modications in which the interference neutralization is controlled by varying the effective length of the leads by means of tappings. The series impedance in the connection to the earth terminal of the receiver mav under suitable conditions comprise only pure resistance, capacity or inductance. Specification 424,239 is referred to.
Patent GB-286248-A (GB)
Title: Improvements in and relating to non-return valves
IPC: F16K15/06
Filed: 1928-02-24
Abstract: 286,248. Andersen, G. March 1, 1927, [Convention date]. Dashpots, applications of.-A non-return valve 5 is provided with a dashpot comprising a tubular extension 6 on the valve member arranged to work in a cylinder 7 formed in the cover 8. Ports 10 are provided in the tubular member and inclined passages 9 are formed in the cylinder, which ports and passages are progressively throttled by the movement of the valve.
Patent GB-678128-A (GB)
Title: Screw thread cutting apparatus
IPC: B23G1/22
Filed: 1951-03-12
Abstract: 678,128. Screwing die-heads. LANDIS MACHINE CO. March 12, 1951 [May 25, 1950], No. 5884/51. Class 83 (iii). A die-head comprises a body portion 22 provided with a flange 26 having on its front face slideways 28 along each of which is movable a chaser-holder assembly comprising a slide 30 having a chaser-holder 32 detachably secured thereto, each slide being retained in its slideway by spaced gib plates 50 screwed to the front face of the portion 22 so as to allow the chaser-holder to be readily removed from its slide without the necessity of removing the latter from its slideway. Each chaser-holder has a tongue-and-groove connection with its slide extending perpendicularly to the path of movement of the slide. The slides are moved in their slideways, to adjust the position of the chasers, by a cam ring 56 having grooves 58 in which move rectangular followers 60 connected with the slides by pins 64. Reduced portions 68 on the followers prevent them from binding in the end walls of the grooves. The cam ring is operated by a bell-crank lever 74, one arm of which is connected by a toggle link 82 to a nut 90 engaging a screw 92 journalled in the end walls of a slot 94 in a lug 96 integral with the cam ring. Manual rotation of the screw 92 allows the cam ring to be rocked independently of the lever 74, to adjust the chasers to a predetermined position, and the adjustment of the nut 90 along the slot 94 is indicated by scales on the lug 96 co-operating with index lines on the nut. The closed position of the die-head is maintained by a protuberance 122 on the arm of the lever 74 striking a pad 83 on the link 82.
Patent GB-1457184-A (GB)
Title: Device for lifting and pivoting a metallurgical vessel
IPC: B22D41/13
Filed: 1974-02-08
Abstract: 1457184 Continuous casting VEREINIGTE OSTERREICHISCHE EISEN - UND STAHLWERKE ALPINE MONTAN AG 8 Feb 1974 [27 April 1973] 5913/74 Heading B3F [Also in Division F4] A melt-handling vessel such as a tundish 2 is secured for vertical movement and horizontal swinging, on a hollow column 1 rotatable about its axis (on a fixed piston 8 on which it can be raised and lowered by internal pressure) by a cylinder-and-piston drive 14, 13, on which is pivoted a first lever 11 rigidly secured to the column 1 and a second lever 16 swingable about a stationary axis (of a pin 17 fixed to the casting platform 7) there being a rod 19 also pivoted on (a lug on) the second lever 16 and on a ring 21 rotatable on the column 1. On moving the column 1 and tundish 2 vertically, free swinging of the lever 16 about the pin 17 compensates for pivoting movement of the lever 11 as the column moves. In another arrangement, the ring 21 is below the lever 11 and the lever 16 pivots about a horizontal axis.
Patent GB-889875-A (GB)
Title: Transmission belting
IPC: D03D3/00
Filed: 1958-02-24
Abstract: 889,875. Belting. LEWIS & TYLOR Ltd., and LAWSON, N. Feb. 6, 1959 [Feb. 24, 1958], No. 5924/58. Class 142(4) The tendency of a woven belt to twist or run to one side of the pulley is obviated by using warp ends consisting of an even number of equally but oppositely twisted yarns lying side-by-side, for example S-twist and Z-twist singles, SZ and ZS plied, or SZS and ZSZ cabled. The weft may be similar, for example four S-twist singles alongside four Z-twist singles. Before weaving, the composite yarns may be impregnated with rubber so that the constituent yarns adhere together. In a belt woven endless, the helical disposition of the continuous warp may be balanced by choosing a weft of suitable twist.
Patent GB-597152-A (GB)
Title: Improvements in ultra-high-radio-frequency tuning apparatus
IPC: H01P7/04
Filed: 1944-03-30
Abstract: 597,152. Electric resonators. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 30, 1944, No. 5935. Convention date, March 31, 1943. [Classes 40 (iii) and 40 (v)] An ultra - high - frequency resonator comprises either a coaxial line whose inner conductor has a quarter-wave section and a half-wave section, Fig. 1, or a system in which a pair of line elements 4, 5, Fig. 3, terminates in a capacitive load at its upper end, and in an inductive element 10 with two variable capacities 7, 8, Fig. 3, at the other. A coaxial line, Fig. 1, connected at its open end to a utilization circuit such as a valve 16, may comprise a length of inner conductor 104 approximately half a wavelength long and a further length 110 approximately a quarter of a wave-length long. The former length terminates in the capacitive anode impedance of a valve 16, white the latter length is coupled at its remote end to the outer conductor 105 through the constant capacitance with dielectric 12, between the outer conductor and a plunger 11 which can be moved for the purpose of varying the capacitive coupling 13 between the two lengths of inner conductor. Another embodiment of the invention is incorporated in each u.h.f. stage, Fig. 3, of a superheterodyne receiver. The intervalve coupling I, for instance, comprises a resonant line 4', 5<1> of length between #/4 and #/2 terminating on fixed plates of tuning condensers 6<1>, 7<1>, the movable plates of which are connected through an inductance 10<1> which may rotate with the movable plates. The impedance of this circuit is matched to that of the u.h.f. amplifier A by means of a shunt condenser 33, and auxiliary condensers such as C may be selectively connected by means of a wave-range switch S. Similar tuning-circuits are provided on the input side of amplifier A and in the local oscillator O and mixer D, from which the I.F. is taken at 60. The unit is enclosed in a screen, and the stages are screened from one another, but apertures in the screens permit of interstage coupling and backcoupling of the amplifier, as indicated at M. In the amplifier the cathode of the double tetrode 24 is earthed through a grid-bias resistance 25 and the end of the resonant line 4, 5 is earthed through the centre-tapped resistance 27, 28. The mixer stage D is similar. In the u.h.f. local oscillator O the resonant line 4<111>, 5<111> is connected to the anodes and the grid circuit comprises a loop 51 of copper foil. A practical embodiment is illustrated in Fig. 4 (not shown). The switches S may be so operated as to provide a tuner of the scanning type.
Patent GB-1380261-A (GB)
Title: Fluid flow control apparatus
Inventor: BANDYOPADHYAY RANAJIT
IPC: A61M16/10
Filed: 1971-03-04
Abstract: 1380261 Respiratory appliances BRITISH OXYGEN CO Ltd 1 March 1972 [4 March 1971] 6022/71 Heading AST Apparatus (Fig. 1) for selectively providing constant, increasing or decreasing flow rates for each of two fluids, e.g. gases in a lung ventilator, which are subsequently to be mixed (Fig. 4) comprises a conduit 2, 4 for each fluid; a fluid-flow regulator 6 located in each conduit 2, 4; a chamber 14 communicating with both regulators 6; a first valve 20 for placing the chamber 14 selectively in communication with either the atmosphere or a source of pressurised fluid; a second valve 22 for venting the chamber to atmosphere through an adjustable impedance 24; and a pair of linked valves 26 for venting the conduits 2, 4 downstream of the regulators 6 to atmosphere. The source of pressurised fluid may be the source of one of the fluids to be mixed, in which case the chamber 14 is connected as shown to one of the conduits 2, 4 upstream of the regulator 6, via a regulator 16 and an adjustable throttle valve 18. The valves 20, 22, 26 are operated by solenoids S20, S22 and S26 respectively. Regulators 6 are designed to maintain a pressure in conduits 2, 4 substantially equal to that in the chamber 14. A constant flow rate of both fluids is thus obtained when all solenoids are deenergised, as shown, and the pressure in chamber 14 is at a constant high value. A reducing flow rate is obtained by energising solenoid S22 to vent chamber 14 to atmosphere. An increasing flow rate is obtained by initially energising solenoids S20 to S26, and then deenergising them. The above apparatus is connected in series with apparatus (Fig. 4) for mixing the two fluids in a preset ratio selected from a set of at least two possible preset ratios, and comprising at least one inlet conduit 40 for each fluid, and at least two outlet conduits 42 each connected to both or all inlet conduits 40 through separate preset flow impedances 52, and in which each outlet conduit 42 is connected through a separate outlet valve 56, 58, 60 to a common outlet manifold 48. When a plurality of inlet conduits 40 are provided for each fluid, each inlet conduit of each plurality is connected through a separate inlet valve 50, 51, 53 to a common inlet manifold 44. The apparatus shown supplies, through outlet valves 56, 58, 60, the two gases A, B mixed in three preset ratios, as well as supplying pure A or pure B through additional outlet valves 54 or 62 respectively. The flow rate is selected by operating a selected inlet valve. The inlet valves are solenoid operated. The ratio is selected by operating a selected outlet valve. Each flow impedance includes a non-return valve (64), Fig. 5 (not shown) in series with an adjustable throttle valve (66).
Patent GB-164101-A (GB)
Title: Improvements in or relating to friction clutches
IPC: F16D23/12
Filed: 1920-02-28
Abstract: 164,101. Accles, J. G. Feb. 28, 1920. Clutches, friction; operating clutches.-In operating-means for clutches, such as those employed in connection with countershaft and other gear-boxes for motor-cycles &c., a main push-rod 16 is actuated for clutch-release by a short rod 11 adjustably screwed in an axiallymovable and rotatable spindle 8 and provided with a look-nut 14 and screwdriver slot 15. The spindle 8 has a flange 6 provided with camfaces 7 coacting with similar faces on a member 1 fixed in a housing 3, which is bolted by a flange 22<1> to the gear-box cover 5 and carries an arm, to which may be attached the sheath of a Bowden cable for operating a lever 10 secured to an extension 9 of the spindle 8. The lever may be replaced by a wheel &c. The push-rod 16 passes through the gear-box shaft 17 and contacts with a thin key 19 abutting on, and sliding in keyways in, a cup 20 of the clutch plate 21, which is pressed into engagement by a spring 18. A driving-sprocket 22, running on ball bearings 23, and a disc 26 carry cork or like studs 27, which bear on driven elements 24, 25, 21, light springs 28 being provided for centring the disc 25 when the clutch is disengaged.
Patent GB-351507-A (GB)
Title: Air propeller with angle of pitch changeable in flight
IPC: B64C11/36
Filed: 1930-02-24
Abstract: 351,507. Air screws. SEIDEL, A., 9, Kaiserdamm, Charlottenburg, Berlin. Feb. 24, 1930, No. 6042. [Class 114.] A variablepitch air screw is constructed so that at high speeds the blade root is held by a plain bearing and at lower speeds by a ball bearing whereby change of the pitch may be effected readily, at the lower speeds. The blade 1 has a conical root portion adapted to engage at high speeds a corresponding conical part 3 of the hub socket 2. The blade at low speeds is constrained by the spring 5 to be free of the socket and is then supported by the ball races 4 ; in this latter condition changes of pitch are effected readily through the bevel wheels 15. In order to minimize vibration, the propeller boss is freely mounted on a sleeve 17 which is itself keyed to the driving shaft 6 and a flange 20 on the sleeve 17 is linked by flexible members 9 with studs on the outer parts of the sockets 2 whereby the drive is communicated. For operating the bevel 15, three members parallel to the propeller shaft are employed each comprising a spur pinion 14 which is integral with an internallyscrewed spindle within which is a further screwed member 12 adapted to be moved endwise, and thus to rotate the spur-wheel 14, by means of rod 18. The inner end of each rod 18 is carried by a flange 23 movable by lever 8 from the cockpit of the airplane. The rod 18 is preferably spring-loaded at 13 as shown
Patent GB-511957-A (GB)
Title: Improvements in or relating to binders for sheets of paper or the like
IPC: B42F13/02
Filed: 1938-02-25
Abstract: 511,957. Bookbinding; filing papers. DAVIES, H. V. Feb. 25, 1938, No. 6065. [Classes 16 and 146 (i)] A binder for a pack of sheets 15 comprises separate back and front cover boards 6 of cardboard &c. each having a strip 8 of stiff material hinged to its back edge and normally doubledover against the board to face the opposite board, two or more close-coiled helical springs 11 threaded through registering holes in the sheets; and, for each spring, two substantially flatheaded nails 2, 3 of which the heads are located respectively between the two strips 8 and their associated cover boards and of which the shanks 12 are substantially smooth (i.e., without screwthreading) and pass through the respective strips into the end turns of the spring to make frictional engagement therewith. Specification 408,763 and U.S.A. Specification 1,975,373 are referred to.