baber/WOPTO huggingface dataset:
Patent GB-504455-A (GB)
Title: Method of selecting electric waves without the use of resonance
IPC: H04B1/12
Filed: 1937-08-25
Abstract: 504,455. Wireless receiving systems; thermionic valves. GABRILOVITCH, L. Aug. 25, 1937, No. 23278. Convention date, Sept. 5, 1936. [Classes 39 (i) and 40 (v)] Selectivity is obtained by varying one of the parameters of a circuit synchronously with the carrier frequency of the modulated wave it is desired to receive. Preferably a resistance, which may be a diode, is varied and produces attenuation of the wanted frequency only. The diode may have its resistance varied by electrostatic or electromagnetic control, the former by a grid and the latter by a perpendicular magnetic field, as by coils S on opposite sides of the electron path arranged within the valve envelope as shown in Fig. 1. Fig. 3 shows two parallel signal paths each including a pair of diodes D1, D2 and D11, D12 magnetically controlled by coils BS1, BS2 and BS<1>1, BS12 fed with carrier frequency from a filter F, the path to the coils BS<1>1, BS<1>2 including a transformer Q to give a 90‹ phase shift. The modulated wave is stated to be eliminated in the path D1, D2 but to be transmitted by the path D<1>1, D<1>2 together with all incoming modulated waves. The outputs of the detectors Dt, Dt<1>, the former having carrier frequency from the filter F applied to it, and including a transformer Ti to give a 90‹ phase shift, are opposed in the transformer TBF to balance out the interference, so that the wanted frequency band which passed by D<1>1, D<1>2 and rejected by D1, D2 is obtained. Resistances, not shown, may be provided to enable the interfering currents to be balanced exactly. In a modification, Fig. 4 (not shown), electrostatically controlled diodes are. used in one channel only, the output from which is balanced against the output of an ordinary receiver channel, the detector circuits being similarly arranged to the circuit shown in Fig. 3 except that the dephasing transformer Ti is omitted. A push-pull amplifier with the valves biassed to cut-off may follow the detector and the selectivity is stated to be increased by adjusting the bias of the amplifying tubes.
Patent GB-827540-A (GB)
Title: Improvements in or relating to infra-red analysing apparatus
Inventor: MARTIN ALBERT EDWARD
IPC: G01N21/37
Filed: 1956-07-27
Abstract: 827,540. Infra-red gas analysis. GRUBB PARSONS & CO. Ltd., Sir H. June 7, 1957 [July 27, 1956], No. 23314/56. Class 40 (3). In an infra-red gas analyser comprising absorption tubes 1, 2 and detector chambers C connected to a diaphragm condenser D, E in a chamber 3, a single infra-red source H with a double rotating chopper S is arranged between the ends of the tubes 1, 2. The respective tubes 1, 2 and chambers C can be arranged at an angle to one another instead of being in a straight line.
Patent GB-260725-A (GB)
Title: Improvements in screw propellers
IPC: B64C11/34
Filed: 1925-09-19
Abstract: 260,725. Armstrong Siddeley Motors, Ltd., Viale, S. M., and Towns, H. L. Sept. 19, 1925. Screw propellers.-In screw propellers wherein the pitch of the blades is automatically varied by centrifugal force, a weighted lever pivoted to the propeller hub and provided with a crank or eccentric is connected directly or by a link to each propeller blade. Means for locking the adjusting mechanism is provided, and the blades may be separately adjusted for obtaining initially an equality of setting. The blades are carried in sleeves 5 in sockets on the boss 2 and the sleeves have lugs 16 which are connected by adjustable links 14 to cranks or eccentrics 13 on the pivots 10 of bell-crank levers 9 the ends 12 of which are bob weights 11 arranged to move radially. The pivots 10 are supported in brackets 8 on the hub. The arms 18 of the bell crank lever are connected by links 19 to a collar 20 adjustably secured to a sleeve 23 slidable on the hub against a spring 22. The bell crank levers may be balanced by compensation weights 25. To hold the blades at any desired pitch, a brake shoe may be brought to bear on the blade or lever, or a positive lock such as a ratchet and pawl gear may be employed.
Patent GB-944610-A (GB)
Title: A reciprocating pump for distributing apparatus
IPC: F04B53/10
Filed: 1961-06-29
Abstract: 944,610. Valves; joint-making packing. KOOPERATIVA FORBUNDET EKONOMISK FORENING. June 29, 1961 [July 5, 1960], No. 23621/61. Headings F2B and F2V. [Also in Division F1] A reciprocating pump for supplying measured quantities of liquid or paste has a motor piston rigidly connected to a pump piston. The inlet and outlet valves are combined in a single unit comprising discs 19, 25 having annular packings 21, 26 respectively mounted on a spindle 27 which passes through an annular seat 18, as shown in the exploded view in Fig. 3. On the suction stroke of the pump, the valve unit rises, liquid flows under a seal 21, through a channel 22 into the pump cylinder. On the discharge stroke the liquid flows through the channel 22, the apertured seat 18, over a seal 26 and into the outlet 32. The valve disc 19 has a seal 20 which engages the pump cylinder wall, and the upward limit of travel of the disc 19 is determined by a check nut 31 on the end of the spindle 27. The discs 19, 25 may be provided with T-shaped grooves (Fig. 4c) to accommodate the annular packings 21, 26. These have recesses 34 which allow them to be sprung into the grooves, the recesses 34 being filled with a plastic substance 36 inserted through a cannula 35.
Patent GB-360474-A (GB)
Title: Regenerative cable repeaters for telegraph systems
IPC: H04L25/42
Filed: 1930-08-07
Abstract: 360,474. Code telegraphy. CONNERY, A. F., 22, Revere Place, Brooklyn, and INTERNATIONAL COMMUNICATIONS LABORATORIES, Inc., 67, Broad Street, both in New York, U.S.A. Aug. 7, 1930, No. 23653. [Class 40 (iii).] In a regenerative repeating system a curbing relay under control of a distributer connects earth to the outgoing cable between successive unit impulses. Signals received over an incoming cable 1 are applied through a shaping network 2 to the coil 7 of a cable relay 7A. According to the polarity of the received signal impulses the relay tongue 9 engages one of the contacts 10, 11 effecting the energization of the dot or dash receiving relay 12, 13 respectively. The relay energized closes through its tongue 14 or 15 a circuit for a coil 22 or 23 of relays 20, 30. Assuming the dot relay 12 to have been operated, the tongue 24 of the relay 20 will be moved to its right-hand contact and a circuit will be completed from battery through a locking winding 23, winding 42 of relay 40 operating tongue 44 to its right-hand contact, locking winding 31 of relay 30, a coil 51 of relay 50 to ground at 67 when the brush 65 of a distributer 60 engages live segments 62. The tongues 44, 54 are operated to contacts corresponding to the positions taken up by the tongues 24, 34 which are locked in their positions during the passage of the brush 65 over the segments 62. During the reception of signals the tongues 24, 34 and the tongues 44, 54 will be on opposite contacts and positive or negative current will be transmitted to the line 80 over the back contact 73 of the curbing relay 70. This relay energized through segments 64 of the distributer 60 connects ground to the outgoing line 80 between successive unit impulses and thus breaks up a long impulse of positive or negative polarity into its constituent unit impulses. The brush 65 is phased to pass over the segments 62 to complete the circuit through one of the relays 40, 50 at about the middle of the received signal impulse. Although either of the relays 20, 30 may be operated as the brush 65 passes over the segments 63, 64, neither of the relays 40, 50 will be energized until the segments 62 are again engaged by the brush.
Patent GB-406341-A (GB)
Title: Improvements in or relating to knitting machines
IPC: D04B35/22
Filed: 1932-08-24
Abstract: 406,341. Knitting-machines. WILDT, E., ROBINSON, R. H., and WILDT & CO., Ltd., Adelaide Works, Leicester. Aug. 24, 1932, No. 23706. [Class 74 (ii).] Warp yarns to be knitted together with a ground or body yarn are lubricated during their passage to the needles from the supply bobbins or reels. The yarns 9 are caused to pass through guide holes in a ring 12 adjacent to which is supported an annular lubricating wick 19, the end 18 of which dips into a container 16. Specifications 364,039 and 376,736 are referred to.
Patent GB-1481013-A (GB)
Title: Electrostatographic charging system
IPC: G03G15/02
Filed: 1974-05-29
Abstract: 1481013 Automatic control of electrostatic charging XEROX CORP 29 May 1974 23706/74 Heading G3R The electrostatic charge applied to a movable photo-receptor surface in a copying machine is controlled by regulating either the current received by the photo-receptor, or a current which is arranged to be equal to the photo-receptor current. As shown in Fig. 1, a coronode wire 12 with an earthed shield 13 is connected to a power supply 10 and produces a corona discharge which charges the surface of a photo-receptor drum 14. Current flows from the drum by way of slip rings 15 to a comparator 16 which receives a reference signal and produces a control signal for the power supply 10 to keep the current at the desired value. In an alternative embodiment, Fig. 2 (not shown), current flowing to the comparator 16 from the shield 13 and the supply is regulated, while the photo-receptor 14 is earthed. A device may be included for measuring the residual voltage on the drum 14 and inhibiting the charging process if the measured voltage exceeds say 10 volts. A further sensor may be used to prevent charging if illumination used to discharge the drum surface is not present. Two or more coronodes may be used for charging the drum.
Patent GB-1291209-A (GB)
Title: Improvements in or relating to the production of contact metal layers in semiconductor components
IPC: H01L23/29
Filed: 1971-04-19
Abstract: 1291209 Semi-conductor electrodes SIEMENS AG 19 April 1971 [13 March 1970] 23728/71 Heading H1K [Also in Division C7] A metal contact layer is produced on a semiconductor layer of, e.g. silicon by spraying thereon a solution of molybdenum or chromium diacetyl dihydrazone tetracarbonyl in an organic lacquer; e.g. nitrocellulose in a butyl acetate-ether mixture. Excess is removed by centrifuging, and the deposit is thermally dried and pyrolysed to the metal in oxygenargon atmosphere, after which the layer is alloyed into the semi-conductor by heating in a tube furnace. The lacquer vehicle may be photosensitive, and be selectively exposed and developed; so that the deposit is removable from parts of the semi-conductor before pyrolysis to the metal. Alternatively a photosensitive lacquer may be applied over the metal containing lacquer for the same purpose.
Patent GB-798260-A (GB)
Title: Improvements in or relating to a process for the production of isopropyl alcohol and di-isopropyl ether from propylene
IPC: C07C29/06
Filed: 1956-08-01
Abstract: Isopropyl alcohol or di-isopropyl ether is obtained by contacting propylene or a mixture thereof with an inert gas with about 70-80 per cent by weight, preferably 75 per cent, aqueous sulphuric acid at about 70-80 DEG , preferably 75 DEG  C., and treating the effluent gas-vapour mixture with an appropriate wash liquid. For the preparation of the alcohol, the wash liquid is water, preferably at a temperature of 10 DEG  C., and the residual gas is recycled, preferably after being contacted with tepid water.  The aqueous alcohol is fractionated to remove ether, and distilled to produce the aqueous alcoholic azeotrope.  In preparing di-isopropyl ether the wash liquid is isopropyl alcohol, preferably containing some water, e.g. the water-alcohol azeotrope or aqueous alcohol containing 10 per cent of water.  Residual gas is recycled, preferably after contact with warm aqueous isopropyl alcohol.  The solution of ether in alcohol obtained from the washing step is distilled to yield the ternary water - alcohol - ether azeotrope, which is condensed and separated by decantation.  The upper layer contains 91 per cent di - isopropyl ether.  Specification 586,829, [Group IV], is referred to.
Patent GB-621738-A (GB)
Title: Improvements in or relating to means for cutting internally projecting gear teeth
IPC: B23F21/16
Filed: 1945-09-14
Abstract: 621,738. Grinding and polishing. PARSONS MARINE STEAM TURBINE CO., Ltd., COOK, S. M., and DOUGLAS, L. M. Sept. 14, 1945, No. 23787. [Class 60] [Also in Group XXII] A machine for producing a hob for cutting internal gear teeth of concave involute form comprises a slide rest with cross slides, as provided in the usual relieving lathes, with which is associated a tool holder carried on a further saddle in a circular guide, said saddle being given an intermittent rotary motion, proportional to the rotation of the work, between cuts on successive hob teeth, the arrangement being such that the relieving motion is towards the centre of the radius about which the relieving tool is rotated. The hob 1 is mounted in the lathe on a mandrel 2 and the tool 7, Fig. 6, which may be a profile tool, as shown, or a profile grinder, is carried on a transversely movable slide 8. This slide is carried by a rotatable saddle 10 carried in circular guides 11 in a saddle 12, also transversely movable along guides on the saddle 14. The relieving motion is obtained through gearing 40, Fig. 4, from the headstock drive, and a central shaft 41 drives through slidable bevel gears and pinions 43, 44, Fig. 7, a vertical spindle 46 driving, through gearing, a cam 48 for reciprocating the slide 8 against a spring not shown. One wheel 44 is mounted for adjustment in an arcuate slot so that the relieving drive may be brought into mesh again if the slide 12 is adjusted transversely. The arcuate form of the cutter is obtained' by a stepwise rotation of the tool holder through the rotatable saddle 10, this may take place about a centre on the work axis or a different centre according to the adjustment given to the saddle 12. The stepwise rotation is such that it takes place rapidly while the cutter moves through the flutes or gaps between successive cutter teeth and is obtained by a toothed gear drive 18 from the headstock spindle to a shaft 20, Fig. 4, further gearing 21, 22, a spring coupling 33, notched plate 32, spring-pressed plunger 34 and cam member 36, also mounted on shaft 20. The spring 33 is wound up during cutting of a tooth and then cam member 36 releases the plate 32 which drives through further gear trains 23-30, a worm wheel 19 which rotates the saddle 10. The gearing may be changed to allow for variations in the number of flutes and to vary the amount of angular movement of the tool during each step.
Patent GB-461973-A (GB)
Title: Improvements in display or pattern cards for yarns and methods for producing the same
IPC: G09F5/04
Filed: 1935-08-26
Abstract: 461,973. Packages. HIRST, R., and READICUT WOOL CO., Ltd. Aug. 26, 1935, No. 23847. [Class 94 (i)] [Also in Group XVIII] A method of making pattern cards for yarns comprises feeding the yarns a together with an adhesive strip b<1> through rollers e, f, the roller f being heated to soften the adhesive, cutting the sheet with the attached yarns into strips a' and attaching the strips to cards c<1> in some such manner as shown.
Patent GB-1096144-A (GB)
Title: Improvements in mineral-mining machines
Inventor: HIGGINS BERNARD ARTHUR
IPC: E21D9/10
Filed: 1963-06-15
Abstract: 1,096,144. Mineral-mining machines. COAL INDUSTRY (PATENTS) Ltd. Sept. 15, 1964 [June 15, 1963], No. 23932/63. Addition to 957,716. Heading E1F. The cutter means of the referred to parent Specification 957716 are modified in that the single, swingable arm having one or more cutters rotatable about the longitudinal axis thereof is replaced by two or more of such arms angularly spaced with respect to each other and angularly movable as\a unit about a similar axis as that of the single arm.
Patent GB-600223-A (GB)
Title: Improvements in or relating to apparatus for feeding cut tobacco
IPC: A24C5/39
Filed: 1945-09-17
Abstract: 600,223. Cigarette-making machines. MOLINS, D. W., RUAU, F. F., FRANCIS, A. E., and MOLINS MACHINE CO., Ltd. Sept. 17, 1945, No. 23935. [Class 130] [Also in Group XVII] In a tobacco-feeding apparatus in which tobacco in a hopper 2 is removed by a carded roller 5 to a cigarette-making machine, the movement of the tobacco is assisted by reciprocating bars 9 placed side by side so that the tobacco shorts fall between them. The bars, which are preferably toothed or roughened for at least a third of their length from the roller 5, are mounted on eccentrics 10, 11 and driven by the eccentric 10 so that they move upwardly and forwardly alternately. Surplus tobacco is removed from the roller 5 by a reciprocating toothed blade 13 having a guide 15, a presser 17, and a pinned roller 20, as described in Specification 520,178. The hopper base plate 4 may be mounted on springs 25 and vibrated as described in Specification 549,397. Eccentrics on a shaft 27 are connected by a plate 29 to the plate 4, and by a plate 30 and a weight 31 to a further spring 32. The mounting of the shaft 27 can be adjusted by screws 35 to vary the distance between the end of the plate 4 and the roller 5. The shorts are thus fed down a spring plate 36 to a worm conveyer 38, whence they are blown by a fan 40 through a pipe 41 and spread over the roller 20 by a baffle 42. The feeding of the shorts may also be assisted by arranging the bars 9 close to the plate 4 and providing further bars having carding pins or teeth underneath. These bars are moved downwardly and forwardly alternately by the clockwise-rotating shaft 7. The tobacco is fed to the cigarette-making machine by a picker-roller 23. In a large hopper a second conveyer plate may be provided, the feeding bars being bent to correspond with the angle between the plates. Specification 370,640 also is referred to.
Patent GB-1562967-A (GB)
Title: Indole derivatives and process for preparing the same
IPC: C07D209/30
Filed: 1977-06-08
Abstract: The compounds of formula VI - the meaning of the symbols is defined in Claim 1 - are prepared by reaction of a corresponding indole either with an  omega -haloamine or first with ethyl chloroacetate or acrylonitrile and then, after saponification to the carboxylic acid, with an amine NHR4R5, and the amide formed is reduced. The starting indoles can be obtained by well-known Fischer or Bichler methods. The compounds of formula VI as well as their acid addition salts are useful in medicine as anti-depressant agents for the central nervous system. <IMAGE>
Patent GB-643143-A (GB)
Title: Improvements in duplicating machines
IPC: B41L11/00
Filed: 1946-08-14
Abstract: 643,143. Copying documents; feeding sheets. FORD, R. M. Aug. 14, 1946, No. 24081. Drawings to Specification. [Classes 100 (i) and 100 (ii)] A rotary mirror-script duplicator comprises a guide bar parallel to the printing cylinder, two feed trays mounted on a pair of brackets which may be retained in various positions along the guide bar, a moistener, a moistening plate, absorbent means engaged by the sheets and a liquid transfer member for each feed tray, said members being constantly in contact with the absorbent means and being automatically moved into contact with the moistener during the operation of the machine and out of contact when the machine is in the registration position. The machine described is the same as that described in Specification 643,142.
Patent GB-691129-A (GB)
Title: Improvements in vehicles
Inventor: BOOKEY JOHN TERENCE BROWNRIGG
IPC: B60P1/48
Filed: 1950-10-02
Abstract: 691,129. Weighing-apparatus. CHARROLD, Ltd. Oct. 2, 1951 [Oct. 2, 1950], No. 24084/50. Class 143 [Also in Group XXX] A hopper vehicle carries a weighing machine, from which is suspended a sack arranged below the controllable outlet of the hopper and the sack is displaceable by a power-driven hydraulic ram to a second higher position where it may easily be handled. In one embodiment, the vehicle has a hopper-shaped body 1, Fig. 1, with a rear discharge outlet 2. On opposite sides of the outlet 2 are two arms 3, attached to a shaft 4 mounted in bearings 5. The arms are pivotally connected at their free ends to a hanging platform 7 which can be raised to the dotted position by a hydraulic ram 14, 16, operated by the vehicle engine and which rotates shaft 4 through connecting links 18. The sack 8 is supported under outlet 2, for filling, by a U-shaped carrier 9 supported by chains 10 from a weighing device 12 carried by brackets 13. When the platform 7 is raised, it engages the member 9 to lift the sack into the unloading position. In a modification, Figs. 3, 4 (not shown), there are two pairs of pivoted arms to give the platform a parallel motion, the rotating shaft is operated from the ram through a chain and sprocket and the weighing device is carried by a structure which is moved upwards with the platform by the pivoted arms. In a further embodiment, the sack is supported by a carrier member 9, Fig. 5, attached to the weighing device 12 which is raised and lowered by a rope 43 passing over a pulley 44 and round a double-sheaved pulley member 46 attached to a hydraulic ram. The carrier 9 is guided by a pair of cam surfaces 41, formed on frame members 40, and engaged by pairs of guide rollers 49<SP>1</SP>, 49' borne by the carrier 9. In the upper position these rollers enter slots 50 in the members 40 and may actuate a counter 53. In the lower position the weighing device 12 is supported by a horizontal arm 42 which rests on brackets 52. In another embodiment, the sacksupporting member 9, Fig. 7, is supported by the weighing device 12 which is attached to a horizontal bar, which forms part of an inverted U- shaped member 62. The side plates of the latter carry rollers 63, 64 engaging internal channels in the frame elements 60. The hydraulic ram 65 is connected to a crossbar having rollers 68 engaging the channels in the frame members 60. The cross- . bar also carries rotatable sprockets over which pass chains 70 one of end of each of which is anchored, the other ends. being attached to the movable member 62. As the members 67, Fig. 8 (not shown) and 9 are raised by operation of the ram, rollers 63, 64 move along inclined channels in the branches 60<SP>2</SP>, 60', respectively, of the members 60, and then vertically upwards in the main channels, to. the position shown in dotted lines. In a modification a further platform is raised beneath the member 9 to support the weight thereof, Figs. 9, 10 (not shown). Specification 643,588 is referred to.
Patent GB-1492495-A (GB)
Title: Load sensing mechanisms for use on motor vehicles
IPC: B60T8/18
Filed: 1976-05-27
Abstract: 1492495 Load responsive brake valves CLAYTON DEWANDRE CO Ltd 27 May 1976 [4 June 1975] 24122/75 Heading F2F A load responsive valve O for the brakes of a twin axle vehicle rear wheel assembly is connected by a linkage N, L, J to the suspension of the two axles R 1 , R 2  so that the valve is responsive to the mean displacement of the two axles. The axle R 1  is mounted on a leaf spring connected at one end to the chassis. The axle R 2  is mounted on a lever G pivoted at F to the chassis, and connected to the free end C of the leaf spring. The arm J of the linkage is connected at one end to the point C, which moves in accordance with movement of the axle R 2 , and intermediate its ends by a link to the axle R 1 . The link K is positioned so that the displacement of the end M is proportional to the mean vertical displacement of the two axles.