baber/WOPTO huggingface dataset:
Patent GB-1417069-A (GB)
Title: Circuit arrangement for converting a bridge unbalance into a frequency variation
IPC: G01R19/25
Filed: 1973-03-20
Abstract: 1417069 Resistance bridge PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 20 March 1973 [23 March 1972] 13240/73 Heading G1U An arrangement for converting the unbalance of a resistor bridge RB1, ..., RB4, Fig. 1, into a corresponding frequency variation comprises two closed loops, (1) a potentiometric loop including the resistor bridge, an amplifier K and a second amplifier V3 whose input is controlled by the amplifier K and whose output offsets the bridge unbalance voltage at the input to the amplifier K across a resistor Rk, and (2) an oscillatory loop also including the amplifier V3, together with a network R1, R2, R3, Cl, an amplifier V1 an integrator, and a subsidiary loop including an amplitude detector AR and the resistor R1, which maintains the amplitude of the integrator output signal constant. Thus bridge unbalance causes the input voltage to amplifier V3 to be changed; this tends to change the input to amplifier V1 and hence the output of the integrator V2, which changes are prevented from occurring by a change in value of the resistor R1, which results in a change in frequency of the oscillator. In a modification Fig. 2 (not shown), the variable resistors are constituted by electronic multipliers, and the connections from terminals Us and Uk to the bridge are interchanged so that the frequency of the oscillator varies inversely with the bridge unbalance.
Patent GB-1003738-A (GB)
Title: Printing apparatus and process
Inventor: WEISS FRANZ
IPC: B41M1/12
Filed: 1964-03-31
Abstract: 1,003,738. Stencilling apparatus. POSTER PRODUCTS Inc. March 31, 1964, No. 13277/64. Heading B6C. An apparatus suitable for printing on a sheet 28 of material comprises a stencil screen 23 supported by a frame 22 a convex perforated support 1 for the sheet 28, a sealing strip 10 of sponge rubber adapted to form a fluid-tight space between the screen 23 and the sheet 28 when the screen and sheet are brought into proximity with one another, and means to reduce the pressure between the screen and the sheet so that a colouring composition in the form of a heavy non-flowing printing ink 26 located on the pervious portions 25 of the screen is drawn therethrough on to the surface of the sheet 28. The sheets 28, which may be porous, is placed over the small holes 4 on the convex base 1 and is held in position by applying suction to a passageway 3. A liquid which is at least a partial solvent for the printing ink is then applied to the sheet, the screen is pivoted downwardly on its hinges, Fig. 1 (not shown), and air between the screen and the sheet is exhausted through holes 5, which are larger than the holes 4, and a passageway 6. The screen is provided with impervious regions 24 and if desired printing colours for use in multicolour printing may be separated on the screen by boundary walls of rubber or metal. The printed design may be over-printed using a different stencil. The screen is initially flat but is deformed into a curved configuration during printing.
Patent GB-196194-A (GB)
Title: Improvements in machine attachments for screwing and tapping metals
IPC: F16D7/04
Filed: 1922-05-11
Abstract: 196,194. Herbert, Sir A., and Lloyd, A. H. May 11, 1922. Attachments for screwing and tapping.-In yielding drive attachments, a clutch is provided comprising a x i a l spring - pressed plungers having bevelled ends engaging similarly shaped radial recesses in the tool holding member. The attachment consists of a body A having an axial recess A<5> in which a toolsocket B is rotatably secured by means of balls D, inserted through a radial hole in the hole in the body. The latter contains axial recesses A<11> in which are freely mounted plungers E, having bevelled facets E<4> for engaging radial grooves A' in the socket. The plungers are acted on by springs E<2> which abut against pins F adjusted axially by means of a knurled cap G screwed on the body.
Patent GB-788643-A (GB)
Title: An aircraft having a detachable cabin
IPC: B64D25/12
Filed: 1956-05-01
Abstract: 788,643. Jet propulsion nozzles. ZBOROWSKI, H. P. G. A. R. VON. May 1, 1956 [May 4, 1955], No. 13328/56. Class 110 (3). [Also in Group XXXIII] A rocket motor 6 shown in half-section has a nozzle 8 pivotally supporting four circurnferentially spaced two-armed levers 11. One arm of each bears a spoiler 9, and the other arm is operable by an electromagnet 10.. The electromagnets are operable to move one or other spoiler into the jet stream, thus deflecting it. Specification 730,069 is referred to.
Patent GB-1492654-A (GB)
Title: Method of and apparatus for the dynamic positioning of a floating body
IPC: G05D1/02
Filed: 1975-04-02
Abstract: 1492654 Automatic control systems J M VOITH GmbH 2 April 1975 [6 April 1974] 13406/75 Heading G3N The position of a floating body is controlled according to actual forces and direction of wind, waves and current measured before they act on the body. The measured values are compared in a computer with reference values, to control thrust generating devices on the body. In the embodiment, the measuring devices 4, 5 are mounted on buoys 3 spaced around the body 1 e.g. a drilling platform, or on booms mounted on the body itself. Anemometers 4 measure the direction and strength of the wind, and pressure devices 5 measure oncoming waves and currents e.g. the height, steepness and speed of advance of the waves. The results are transmitted e.g. by radio to computer 7, which also receives a signal from equipment 12 measuring the actual positional change of the body, and from device 10 measuring the actual forces on the body. The measured values are compared with reference values, from a model or previous tests, to control the thrust generators 2 e.g. variable thrust and direction propellers. In alternatives, the measurements are made optically or acoustically.
Patent GB-696642-A (GB)
Title: Improvements relating to thermally-actuated electric circuit interrupting devices
Inventor: BODDY JOHN
IPC: G08B5/38
Filed: 1950-05-30
Abstract: 696,642. Thermal switches. TRICO-FOLBERTH, Ltd. June 19, 1951 [May 30, 1950], No. 13521/50. Class 38 (v) A thermal flasher, e.g. for vehicle direction indicator lamps, comprises a contact-carrying member 3 tending to move in one direction and normally restrained from doing so by a conducting wire 18 which, when heated, expands and allows the member 3 to move in said direction, thereby closing contacts to shunt the wire 18 which thereupon cools, and so on. The member 3 is slotted at 4, 5 to form three strips 3a - 3c, the strip 3a carrying a contact 23, and the strips 3b, 3c, preferably being shortened, as by forming an indentation therein, so as to bow the strip 3a. The wire 18 is fixed at one end to an ear 7 struck up from member 3 and at the other, to an insulator 19 carried by an ear 20 struck up from a strip 11 carrying the co-operating contact 22 and fixed to the base 1, together with an insulating plate 10 and the member 3, by a screw 14, the other end of member 3 being secured with a little play at 9. A resistance 21 is connected between the wire 18 and screw 14. The device may be adjusted by adjusting the resistance 21, or the screw 9, or a screw 13 which secures the turnedover end 12 of the strip 11 to the base, or by an adjustable tension spring stretched between the ear 7 and a rotatable shaft, or by adjustment of the open position of contact 23 by a screw (not shown) bearing against the strip 3a. The member 3 may be in the form of a disc from which two segments are removed to leave an annular part fixed to the base and a diametral strip 3a, Fig. 5 (not shown). One side of the source is connected to the strip 11 either at screw 13 or screw 14, the other side being earthed, and the load is connected to the member 3 either at 9 or at the other end of the member.
Patent GB-317028-A (GB)
Title: Sand cores for use in casting screw-threaded metal articles and apparatus and methods for producing such cores
IPC: B22C9/10
Filed: 1928-05-09
Abstract: 317,028. Gill, H. A., (Richardson. H. T.). May 9, 1928. Moulding-machines; core-boxes; moulds; mould . and core materials.-Threaded cores or mould sections for casting screw-threaded articles have a continuous tapered screw thread preferably terminating at a point short of the end of said core or section. The core may be formed by packing a mixture, comprising 25 parts very fine silica sand with one part raw linseed oil and sufficient water, into a box 21 having a pattern plate 20 with conical face 23 in which is screwed a ring 27 having internally a tapered thread forming the required pattern and externally a thread of the same pitch. The sand is then levelled, a perforated board 22, Fig. 2, is placed on, the whole inverted, the cover 33 removed, and the ring 27 screwed out by a pin wrench 28. The plate 20 may be taken off when the ring has been partly screwed out as it will then clear the sand owing to the taper of the thread or the thread free portion a. The core is then dried and used with other sections to form a mould for the article required. To ensure the ring 27 always being screwed in the same distance indicating marks are provided. In a modification the ring 27 may screw directly into the box 21 and fill it completely so that the sand is packed only within the ring. To make a mould segment with an internal screw a member 51, Fig. 11, with tapered male thread 54, is screwed by a thread of the same pitch into the box 50. This member has also pattern faces b, 53. In another modification a member 66, Fig. 13, is screwed into a collar 62 of a box 64, a tapered continuation 70 of the thread 67 serving as the pattern. Moulding processes.-The screw threads mav be brushed or wiped with kerosene to facilitate extraction.
Patent GB-477444-A (GB)
Title: Improvements in or relating to indicating apparatus for use with timed operations
IPC: G04F3/06
Filed: 1937-05-03
Abstract: 477,444. Clock-driven indicators. LANGBEIN, H. W. May 3, 1937, No. 13720/36. [Class 118 (i)] An indicator for use at cinema theatres, railway stations, and other places, is automatically operated to show progressively the number of units of time through which a timed operation has still to pass before the completion of the operation, and to display such information for each of a sequence of differently timed operations. Timed electric impulses are transmitted to a solenoid 4 to actuate a pawl 9 engaging a toothed wheel 14 which moves a slider 15 on a rheostat 16 in circuit with a galvanometer 17 forming the indicator. The " time to elapse " pointer 18, which is progressively restored to zero as the operation proceeds, is pre-set to the desired amount by turning a knob 30 to set a rotatable stop 24. An electricallycontrolled pawl 39 is then released from the wheel 14 to permit the spring-urged shaft 11 to move the slider 15 until an arm 33 engages the stop 24. The pointer 18 then shows a reading corresponding to that of the dial 31 on the panel 32, When the operation is finished the arm 33 closes a switch 36 to operate (a) a selector 39a which cuts out the rheostat unit 16, and (b) a selector 21 to cut out the lamp illuminating the corresponding item on the indicator board 19. At the same time the solenoid 40 is operated through a delay action switch to release the wheel 14 and reset the arm 34 against the stop 24. A centrifugal governor brake 44 damps the action of the return spring 37a. For each of the three items on the indicator 19 there is provided a separate rheostat unit connected to the main selector 39a and the indicator selector 21. Means are provided for preventing surplus selector pins 59 from closing a redundant circuit, when certain items on the programme are eliminated. The " interval " lamp 56 is controlled by a rocking mercury switch 55. Tell-tales are provided to show the operator the position in which the various units are at any moment. In place of the pointer a spot of light or an illuminated line or slot may be used.
Patent GB-291941-A (GB)
Title: Improvements relating to filler caps for petrol tanks, radiators and other liquid receptacles
IPC: F01P11/02
Filed: 1927-05-23
Abstract: 291,941. Westwood Rim & Patents, Ltd., and Westwood, H. B. May 23, 1927, Plug stoppers, bayonet-joint.-A filler cap for a petrol tank, radiator, &c. comprises a main cover portion a to which is secured a lower member d having a portion formed as a hollow boss adapted to receive a transverse resilient bar e which is riveted to it and is adapted to engage beneath pins l in the receptacle neck to secure the cap thereon. Small holes are provided in the member d and a hole h in the cap portion a, the chamber between these members forming an antisplash device. In a modification, the cap portion a is moulded from synthetic resin &c. and the lower member d is secured to it bv a central bush i and rivets j. The bush may receive, a thermometer &c. or be closed by a cap k. Specification 255,168 is referred to.
Patent GB-570856-A (GB)
Title: Improvements in gratings for ventilation plants
IPC: F24F13/15
Filed: 1943-08-24
Abstract: 570,856. Ventilators. SNEIDERN, A. A. VON. Aug. 24, 1943, No. 13811. [Class 137] A ventilator grating comprises a rectangular frame 1 in which square cells each forming a rigid frame 3 and containing several air directing laminae 5 are settable in four different positions being releasably pressed by a spring against the edges of the setting frame projecting into the opening. In the form shown the frame accommodates three cells and the laminae are adjustably supported by the engagement of studs in holes in the side frame of the cell, resilient washers maintaining them in any set position. The frames may be withdrawn turned through 90‹ and re-inserted as indicated by line 31, being retained against the edge 2a of a front plate by means of a wire spring 4. Damper flaps 7 pivoted to the main frame are operated together by a rod or chain. The laminae of one set are curved, a different effect being produced when the set is turned through 180‹. In a modification the laminae are returned in their set positions by a wire bearing on opposite sides of adjacent studs and in place of wires 4 longitudinal wires at the upper and lower ends of the main frame press a vertical pin moving within slots in the frame against each cell.
Patent GB-1499267-A (GB)
Title: Voltage controlled resistance
IPC: G05F3/24
Filed: 1976-04-06
Abstract: 1499267 Voltage controlled resistances INTERNATIONAL STANDARD ELECTRIC CORP 6 April 1976 [8 April 1975] 13868/76 Heading H3T A voltage controlled resistance offering a wide range of control, comprises FET's 1 and 2 connected in parallel, with their channel resistances controlled by a voltage, source Q1, the gatesource voltage of FET 1 differing by a defined amount, e.g. due to a Zener diode ZD, from the gate-source voltage of FET 2. For low values of control voltage both FET's are off. If the control voltage is increased to a threshold level, FET 2 turns on but FET I is held off until the bias due to ZD is overcome. Greater extension of the control range may be obtained by choosing the dimensions of the FET's so that their channel resistances are different, as measured at equal gate-source voltages. If FET 1 has a lower resistance than FET 2 it may predominate at high control voltages. The FET's may be formed on the same substrate to avoid limitation of the control range which may otherwise arise from manufacturing variations. The resistance may be linearized by feedback. using the networks R1, R2, C for A.C. applications, or by using an active network including operational amplifiers (OP1, OP2), Fig. 2 (not shown), for other applications.
Patent GB-139412-A (GB)
Abstract: 139,412. Burrows, G. H. Aug. 13, 1919 Vacuum cleaning-apparatus. -In a vacuum cleaner having spring-actuated suction means contained within a body propelled over the surface to be cleaned, the axis of the handle used for charging the spring is immovable in relation to the body. The charging handle may be constituted by the propelling handle of the apparatus, and may be rotated at intervals. As shown in Fig. 2, the cleaner body contains a spring a anchored at its inner end to a disk b furnished with projections which engage teeth on a wheel having a spindle d to which the winding key may be applied. A free-wheel clutch &c. prevents rotation of the disk in the opposite direction The outer end of the spring is coupled to a gear wheel e which drives a fan n through wheels f - - l. The fan is enclosed in a casing p having an axial ingress aperture q connected with the suction-nozzle, and forming a flaring channel around the fan leading to an outlet aperture r to which a dust-bag t is detachably connected. The cleaner body is mounted on antifriction bearings v. Two or more springs may be employed. Fig. 3 shows a helical spring 8 as provided in the propelling handle, one end being secured to this handle and the other to the spindle of a bevel wheel 13 meshing with a bevel wheel 14 and driving the fan through a train of gearing. According to the Provisional Specification, the nozzle may contain a brush; the spring may drive the fan through a combination of gear wheels, chain, and bevel wheels,; and the fan may be protected from dust by incorporating a dust-receiving bag near the inlet, filtering gauzes being provided in the rear of the bag.
Patent GB-109674-A (GB)
Title: Improved Course-finder Protractor.
Inventor: GILLIE JOHN WILSON
Filed: 1916-09-30
Abstract: 109,674. Gillie, J. W. Sept. 30, 1916. Protractors; rulers. -For laying off courses, a circular protractor A is used in combination with a straight-edge B, the straight edge having a projecting portion C so disposed that the centre of the protractor lies over the edge of the straight-edge when its circumference touches the portion C. An arm D may be clamped to the protractor so that its end may guide the protractor along the straight-edge.
Patent GB-166152-A (GB)
Title: Improvements in and in the method of manufacturing tyres for bassinettes, horse drawn and hand drawn vehicles, and the like
IPC: B29D30/02
Filed: 1916-10-02
Abstract: 166,152. Sneyd, W. C., and Young, H. E. Oct. 2, 1916. No Patent granted (Sealing fee not paid). Non-metallic elastic bodies and cores.-An elastic tvre, stated to be for use on bassinets, rickshaws, and like vehicles, is made by winding a strip b of proofed bias-fabric with inclined ends about a tubular rubber core a. A plug h of rolled fabric is fitted in one end of the core which is laid on one edge of the flat strip b, the core and strip being then folded to circular form and the plug entered in the opposite end of the core. The winding is then carried out to produce a tyre of the cross-section shown in Fig. 6.
Patent GB-663744-A (GB)
Title: Improvements in furnaces for treating finely-divided solids
IPC: B01J8/30
Filed: 1948-05-24
Abstract: 663,744. Furnaces. DORR CO. May 24, 1948 [June 25, 1947No. 13958/48. Class 51 (ii), In a furnace for treating finely. divided solid material in which a bed of the material is main. tained in a fluidized state by streams of gas flowing upwardly through apertures in a horizontal partition on which the bed is supported, the apertures are fitted with orificed throttle plates 121 which reduce the diameter of the streams of gas and are stated to prevent turbulence and the clogging of the apertures with solid deposits. The diameter of the orifice 122 is from one-fifth to one half that of the aperture, which is made larger than would be feasible if the throttleplates were not used. The velocity of flow through the aperture upstream of the plate may, accordingly, be reduced to below 30 feet per sec., i.e. below the velocity at which turbulence is likely to occur, the increase in velocity produced by flow through the orifice being sufficient to ensure fluidization of the bed. The furnace described is similar to that described in Specification 658,611 which is referred to.
Patent GB-1191661-A (GB)
Title: Improvements in or relating to Machining Apparatus
Inventor: MORRISON WILLIAM CRAIG
IPC: B23D37/02
Filed: 1966-03-29
Abstract: 1,191,661. Broaching. G.B. TOOLS & COMPONENTS EXPORTS Ltd. 28 June, 1967 [29 March, 1966], No. 13965/67. Heading B3L. Two surfaces of a part cylindrical shell 5 are machined in a single stroke of a tool 9, 10 while the shell is clamped in a fixture 6, opposed clamping members 7, 8 being provided which clamp the shell in an axial direction during the whole operation. Clamping members 1, 2 clamp the shell at its terminal portions 3, 4 while the bore is machined but are released for the machining of the edge portions 3, 4. Several shells 5 may be placed in line and machined in one operation and the edge machining may be limited to one peripheral edge.
Patent GB-450274-A (GB)
Title: Improvements in gas-tight joints between metal bodies
IPC: H01J5/20
Filed: 1935-05-13
Abstract: 450,274. Making vacuum apparatus for electric discharges. M-O VALVE CO., Ltd., Electra House, Victoria Embankment, London, and BOYLAND, D. A., c/o General Electric Co., Ltd., Wembley, Middlesex. May 13, 1935, No. 14007. [Classes 83 (ii) and 83 (iv)] [See also Group XL] Welding.-A gas-tight joint between metal bodies, such as parts of the metallic envelope of an electric vacuum discharge device, comprises a washer of a metal other than iron, which is clamped between the opposing faces of the bodies and diffuses into the bodies by heat applied during the process of manufacture, without melting the washer. The parts may be of copper or silver or of iron, steel, or nickel-iron plated with copper or silver and the washer may consist of gold or silver preferably in the form of a welded wire ring. The joint is made at a temperature not less than 350‹ C. and not greater than 800‹ C. Specification 450,275 is referred to.
Patent GB-884064-A (GB)
Title: Selective drilling and percussion assembly
Inventor: GAPSTUR JOHN JOSEPH
IPC: B25D16/00
Filed: 1959-04-24
Abstract: 884,064. Percussive tools. MERIAM, M. April 24, 1959, No. 14009/59. Class 124. A drilling and percussive assembly comprises a housing, a rotatable chuck cam on a driving shaft, a selectively controlled percussive cam, the cams being in axial alignment and having engageable cam faces, resilient means on the shaft urging the percussive cam towards the chuck cam, and a control to produce or stop percussive action. As shown, the assembly comprises a housing 2, arranged for attachment to an electrically powered drill unit, containing a chuck cam 20 mounted on a shaft 40 connected to the shaft of the unit. A percussive cam 30 surrounding, but free to move with respect to the shaft 40 is urged towards the chuck cam by a spring 37. A selection key 55 is urged into a slot 33 in the percussive cam by a spring 56 and may be withdrawn therefrom by a screw 54. When the key 55 is in the slot 33 the percussive cam is held against rotation and produces a percussive action on the chuck cam. and when withdrawn allows the percussive cam to rotate with the shaft.