baber/WOPTO huggingface dataset:
Patent GB-770200-A (GB)
Title: Temperature controlled semi-conductor bias circuit
IPC: H03F1/30
Filed: 1954-07-02
Abstract: 770,200. Transistor amplifying and stabilizing circuits. RADIO CORPORATION OF AMERICA. July 2, 1954 [July 24, 1953]. No. 19523/54. Class 40(6) In a transistor circuit, a temperature sensitive element is arranged to vary the bias in such a manner as to minimize the effect of temperature variations on the circuit. In a Class B push-pull circuit, Fig. 1, the base circuit of junction transistors 10, 11 is biased from the join of resistor 36 and semi-conductor diode 20, preferably of the same element as the transistors so that the emitter-base bias varies with temperature in the sense necessary to stabilize the operating print of the transistors. The emitters are biased by the potential divider 33, 34 and the collectors are returned to the battery 27. Where appreciable energy is dissipated in the transistors, the diode 20 may be thermally associated with one of the transistors, Fig. 2 (not shown). Since the base current may be driven to a value exceeding the current through diode 20, a further diode may be arranged between the points 18, 32 to prevent the former being driven positive with consequent distortion. In a modification, Fig. 3, a driver transistor 41 is employed, the constant emitter current being passed through resistor 45 and diode 20. A fraction of the voltage appearing across the diode is fed over divider 50, 51 to centre tap 18. a further diode 52 preventing this point from being driven positive. Bias for other transistor stages may be derived from diode 20.
Patent GB-134654-A (GB)
Title: Improvements in Centrifugal Extractors.
Inventor: GOOLD LEWIS WILLIAM
IPC: B04B11/04
Filed: 1918-11-27
Abstract: 134,654. Goold, L. W., (American Laundry Machinery Co.). Nov. 27, 1918. Density separators; casings; driving.-The basket or drum of a centrifugal separator is arranged so that part thereof may be moved vertically, and means are provided for preventing this movement while the basket is rotating. The bottom 17 and side 18 of the basket are fixed on the shaft 2, and a false bottom 21 with several radial partitions 20 and an annular cover 22 are carried by a sleeve 19 slidable, along the shaft. The movable part of the drum is raised and lowered by a book 44 carried on an arm 40 in which is fitted a nut engaging a vertical screw 38 driven in either direction by bevel-gears put in mesh by a clutch. The clutch shaft is belt-driven from the pulley 30 solid with the loose pulley 14 of the basket-rotating gear. Hence the raising-gear can only be operated when the rotating-gear is out of action. Pawls 28 pivoted on the shaft 2 engage an annular shoulder 27 on the movable sleeve 19 during rotation of the drum and prevent lifting of the movable portion. The arm 40 also carries a cover for the wide mouth of the casing 1.
Patent GB-871140-A (GB)
Title: Improvements in or relating to machines organised for pressing a rand against a margin of a shoe sole
IPC: A43D47/00
Filed: 1956-06-25
Abstract: 871,140. Applying rands to shoes. BRITISH UNITED SHOE MACHINERY CO. Ltd, and JAMES, C.H. June 24, 1957 [June 25, 1956], No. 19542/56. Class 17(1) A machine for pressing a rand against a sole margin comprises an upper roll 48 disposed so as to engage in the crease between the sole and upper, a lower roll 28 to support the sole margin, a curved edge gauge 66 projecting below the upper roll and following the perimeter thereof, and a curved rand supporting lip 62 projecting below the upper roll towards the edge gauge. The frusto-conical rubber &c. feed roll 28 is driven via reduction gear 6, shaft 24, universal coupling 22, and a shaft 20 which is journalled in a block 18 pivoted at 16. The block and roll 28 are normally urged upwardly by spring 42, but may be covered by means of a treadle and rod 30 to permit the presentation of a shoe. The frustoconical steel presser roll 28 is freely rotatable on a shaft 46 which is canted so that the roll fits snugly in the crease. The rand guide 60, comprising a bridge 64 through which the rand is fed and the lip 62 which extends substantially to the lowermost part of roll 48, is attached to a block 58 whose adjacent face follows the perimeter of roll 48, and which is carried by a link 56 pivoted about a pin 52, Block 58 may contain a heating element. Gauge 66 is integral with a block 68 which is adjustable lengthwise in a block 44 by means of a screw 70 and slot 72. The gauge may be spring urged forwardly within adjustable limits. The gauge comprises a curved strip of the thickness of an average rand, and projects between the feed roll 28 and presser roll 48 to the position shown in Fig. 4 to cooperate with guide 60. A cutting device and marked shearing block may be provided for use when the rand is drawn from a reel.
Patent GB-978326-A (GB)
Title: Photographic camera
IPC: G03B7/12
Filed: 1962-05-21
Abstract: 978,326. Photographic cameras; exposure control. AGFA A.G. May 21,1962 [May 23, 1961], No. 19546/62. Heading G2A. A photographic camera having an automatic exposure regulating device in which means are provided to explore a clamped photo-electric exposure meter needle, said explanatory and clamping means being manually operable through the medium of a frictional overload coupling which also has latching means to hold the explanatory member against the meter needles. In the embodiment shown, rings 7, 8 are arranged coaxially with a galvanometer 3 and are urged by spring 9 into frictional coupling with each other. A locking pawl 17 for ring 8 is initially held in an inoperative position with a lug 15 on it engaging part 14a of a cam 14 on ring 7. A projection 10 on ring 7 engages a slot 11 in a plate 1 of the camera and the rotation of ring 7 is thus limited. When ring 7 is rotated manually in direction a, ring 8 rotates also until rod 22 on ring 8 moves away from spring urged clamp 23 which pivots to clamp pointer 4 of the galvanometer. Ring 8 continues to be rotated until a projection 21 on it engages end 4a of pointer 4, ring 10 then rotates alone until projection 15 enters part 14b of cam 14 and pawl 17 is rotated into its locking position against ring 8 by means of spring. Stop 22 can subsequently be explored by exposure setting means in known manner. When ring 7 is rotated back the other parts are returned to their initial positions.
Patent GB-1346813-A (GB)
Title: Control of circular knitting machines
IPC: D04B15/66
Filed: 1971-06-09
Abstract: 1346813 Knitting machines E MAYER [trading as MAYER & CIE] 9 June 1971 [22 July 1970] 19546/71 Heading D1C Several circular knitting machines share as a pattern programme carrier a store mechanism 15 to which pattern signal data is fed from a computer 10_also connected to other store mechanisms 15, the signals being passed through logic circuits, temporary stores and amplifiers to electromagnets which control adjusting members acting on needles or needle jacks. The stores may be magnetic-core stores, magnetic-wire stores or may consist of an erasable back coupled semi-conductor group.
Patent GB-227749-A (GB)
Title: Improvements in methods of and means for securing railway rails to sleepers
IPC: E01B9/32
Filed: 1923-09-14
Abstract: 227,749. Scheibe, R. Sept. 14, 1923. Sleepers, metal, and securing rails thereto. - Rails 10 are secured to hollow resilient sleepers 11 by clamps 2 resting at their ends on the rail and sleeper and secured by bolts 6 out of the centre of the clamp, the bolts being at least 27 mm. in diameter and the clamps being at least 20 mm. thick when made of material having a breaking strength of 4100 kgms. per sq. cm., the pressure on the rail being at least 5500 kgms. per sq. cm. on each side of the rail. Each clamp has a recess 4, a rib 5 and lateral lugs 3. The sleeper described in Specification 225,947 is referred to.
Patent GB-515866-A (GB)
Title: Method of and means for obtaining photographic images of living and other objects
IPC: G03G17/00
Filed: 1938-07-01
Abstract: 515,866. Photographic apparatus. DROWN, R. July 1, 1938, No. 19584. [Class 98 (ii)] Photographic records of portions of the human body are taken by causing the radiant energy of the body to actuate a photo electric cell and produce electrical changes in a circuit which affects a magnetic field applied across a sensitive plate or film. A source of direct current 1 is connected through a filter 4 to the cathode 2 of a light sensitive cell 3. Across the cell 3 is also connected a circuit containing impedance rheostats 8, a rectifier 7 and a condenser 9, 10 connected in parallel with the rectifier. A photographic plate or film mounted between the condenser plates 9, 10, and when the radiant energy affects the photo-electric cell 3, the photographic plate records it. The whole assembly comprises a portable unit, the rheostats 8 having a pivoted arm which enables the impedance values to be adjusted.
Patent GB-377801-A (GB)
Title: Improvements in lapping machines
IPC: B24B37/08
Filed: 1931-07-08
Abstract: 377,801. Lapping machines. B.S.A. TOOLS, Ltd., Armoury Road, Small Heath, and OGILVIE, W., of B.S.A. Tools, Ltd. Works, Montgomery Street, Sparkbrook, both in Birmingham. July 8, 1931, No. 19619. [Class 60.] Driving and feed devices.-In a lapping machine having opposed laps between which the work is carried by a holder, and wherein one or both of the laps may be rotated hydraulic means is provided for moving one of the laps towards and away from the other. As shown, the machine comprises an upper lap 1 carried by a rotatable and vertically movable spindle 2, and a lower rotatable lap 3, and in the machine frame is movable a hydraulically-operated piston 6 having thereon a rack adapted to rotate a pinion 7, which engages a rack 8 mounted on a sleeve 9 carrying the spindle 2. Fluid is admitted to and exhausted from the piston 6 by a control valve 10 operated by a hand-lever 11, which also is operated automatically by trip devices 12, 13 adjustably mounted on a drum 14 secured to the spindle of the pinion 7. The lap 1 is counter-balanced by a weight 16 carried by a chain &c. 17 connected to a drum on the spindle of the pinion 7. In the base of the machine is a pump 19, driven by a belt 29 from a shaft 28, and supplying fluid from a tank 20 through a pipe 21 to the valve 10 through a pressure regulating valve 23 adapted to byepass fluid to the tank, and thus regulate the pressure of the fluid at the valve 10. Pipes 25, 26 pass from the valve 10 respectively to the upper and lower sides of the piston 6, and an exhaust pipe 41 is provided ; a bracket 40 is secured to the sleeve 9. The lower lap 3 is driven by gearing from the shaft 28, and the lap 1 is driven by gearing 36, through a belt 33 from the shaft 28, and a clutch operated by a lever 30 is provided to start or stop the rotation of the laps. In operation, the lever 11 is lowered to lift the pistons 38 of the valve 10, fluid then flowing from pipe 21 to pipe 26 to lower the lap 1 until, near the bottom of the stroke of the lap, the trip 12 strikes a roller 39 on the lever and thereby lowers the pistons 38 nearly to close the outlet to pipe 26. The lap then descends slowly to engage the work, its pressure thereon being determined by the valve 23. After completion of the lapping operation, the lever 11 is lifted causing the lap to rise, the trip 13 slowing its motion so that it comes slowly to rest with the bracket 40 engaging a stop 15. In order to provide for the slow motion, the pistons 38 are formed with a slot or gap, through which the fluid can pass.
Patent GB-1240425-A (GB)
Title: Removal of inorganic catalysts from polyols
IPC: C08G18/28
Filed: 1970-04-23
Abstract: 1,240,425. Electrostatic separators. WYANDOTTE CHEMICALS CORP. 23 April, 1970 [12 June, 1969], No. 19663/70. Heading B2J. [Also in Division C3] Solutions of polymers in water immiscible solvents are separated from aqueous media by electrostatic means. In Fig. 1 water enters by conduit 25 and the polymer solution by conduit 23, the two are mixed at 24 and pass via 19 into the tank 1 and the mixture directed upwards to electrodes 3. Water (which also contains water soluble impurities from the polymer) settles to the bottom of the tank and leaves via conduit 33. A sensing device is used to activate the level controller 25 which maintains the liquid-solvent interface in the region of the distributor 19. The electrode assembly 3 which is earthed to the tank 1 comprises an assembly of long tubes 7 of square cross-section into which concentric rod electrodes 9 are supported from beneath by an energised and insulated structure or plate 11 which connects to power pack 13 via conductor 15 insulated by bushing 15 from the tank. Fig. 2 (not shown) illustrates a two stage electrostatic separator which contains two sets of electrode assemblies.
Patent GB-746348-A (GB)
Title: Improvements relating to suction cleaners
IPC: A47L5/32
Filed: 1954-07-05
Abstract: 746,348. Suction cleaners. HOOVER, Ltd. July 5, 1954 [July 6, 1953], No. 19669/54. Class 8(1). A converter for a suction cleaner of the type comprising a handle propelled body 10 having a main suction fan 19 and nozzle 11 and a converter port 24 to receive a converter for off-the-floor cleaning, comprises a casing 47 having an inlet port 40 connectable to a hose 70, and which casing has an outlet port 48 fitting into the eye of the main fan 19 when the converter is inserted, and a fan 45 axially aligned with the fan 19 and having a flexible rubber sleeve 50 fitting over the pulley 20 which normally drives an agitator 21, drivingly connecting the two fans. The shaft of the fan 45 is bored to vent the interior of the sleeve 50 to facilitate disconnection.
Patent GB-572451-A (GB)
Title: Improvements in and relating to covers and frames for road gulleys, manholes or inspection covers
IPC: E02D29/12
Filed: 1943-11-25
Abstract: 572,451. Gulleys. HARTLEY, C. J. Nov. 25, 1943, No. 19687. [Class 107] [Also in Group XXV] A gulley frame 12 is provided with inwardly projecting .lugs 13 near two adjacent corners, the cover 10 having, in two adjacent corners bosses 11 with undercut parallel-sided recesses 15 which house and pivot roundthe lugs 13 of the frame 12. The recesses are so designed that the cover 10 can be disengaged only in the raised position. Curved pads or seats 14 at the aforesaid adjacent corners of the frame 12 support the bosses 11 of the cover 10. Specifications 390,806, 474,250. and 521,309 are referred to.
Patent GB-373828-A (GB)
Title: An improved folding wringer stand
IPC: D06F1/00
Filed: 1931-07-09
Abstract: 373,828. Trestles. ROSSITER, F. E., 111, Torquay Road, Paignton, Devon. July 9, 1931, Nos. 19714 and 23191. Addition to 353,778. [Class 52 (v).] The jointed platform near the base of the legs of the wringer stand described in the parent Specification is replaced by a rigid shelf or platform 6, Fig. 1, which is pivoted to the front or back legs and is releasably supported at its free side by means carried by the back or front legs respectively. Alternatively the front and back legs may be connected by rigid bars which may be pivoted to the front or back legs and releasably connected to the back or front legs or, as shown in Fig. 2, jointed struts 9 may be pivoted to the front and back legs and. the front legs are connected by a strut 8 which may be releasably connected thereto at one or both ends.
Patent GB-265640-A (GB)
Title: Apparatus for transmitting views, scenes or images to a distance
IPC: H04N3/04
Filed: 1925-08-06
Abstract: 265,640. Baird, J. L. Aug. 6, 1925. Television.-The image traversing the lightsensitive cell is produced by a series of alternately oppositely-moving image-casting devices each moving transversely to its optical axis and each re-projecting the image produced by the preceding device. Figs. 1 and 3 show apparatus in which lenses carried by rotating discs are employed. The discs are arranged alternately on parallel shafts 7, 8 rotated in the same direction at any desired speeds. The lenses carried by the first disc 1 produce moving images of the object 3 in the plane 4, and these images are reprojected by the lenses carried by the second disc 5 into the plane 9, for further re-projection the speed of movement of the images being increased with each successive re-projection. Ground glass screens may be provided. in the planes 4, 9 &c. to receive the images. The lenses may be arranged in a circle on each disc in which case :the images are finally re-projected into the plane of the light-sensitive cell 23 by an optical device which imparts a movement of the images in a direction transverse to the main movement. This device may be an oscillating or rotating mirror device or a circular series of lenses carried by a rotating disc 20 so arranged that the lenses cross the optical axis 18 transversely to the directions of movement across this axis of the lenses carried by the preceding discs. Alternatively, the transverse movement of the images may be obtained by a spiral arrangement of the lenses in one of the discs carried by the shafts 7, 8. Concave mirrors may be used instead of lenses to reproject the images. The speed of transmission may be increased by replacing the object 3 by a number of identical images thereof produced side by side by a corresponding number of stationary lenses. More than one light-sensitive cell may be used, each associated with a corresponding light source at the receiving station.
Patent GB-1460759-A (GB)
Title: Component cabinet for electronic circuitry
IPC: H05K7/20
Filed: 1974-05-06
Abstract: 1460759 Cabinets for component assemblies QUANTEL Ltd 2 May 1975 [6 May 1974] 19846/74 Heading H1R In a cabinet (Figs. 1, 3) for accommodating electronic circuitry, a standard rack mounted frame 10 having front, rear, and bottom panels 11, 12, 13 (the latter being removed) is provided with handles 15 in a front mounting flange 16 and side panels 17, which are provided with vent holes 18 therein. Each side panel incorporates an escutcheon 20 mounted thereon incorporating a flush folding carrying handle 22 and rubber feet 24 to support the frame when standing horizontally. Detachable flanged rear guards 25 are fixed to the side panels to protect switches, plugs, or the like protruding from rear panel 12, and to support the frame when standing vertically or on its side. The handles 15 similarly protect protrusions from the front panel. Electric plug in circuit boards 28 carrying components, e.g. valves, power transistors, or the like are slidable on guide rails 29 abutting cross rail 30 and are initially connectible over the edges. A fan 32 and filter (not shown) on the rear panel provides a flow of cooling air through the vent holes 18 and the interior of the escutcheons serving as air ducts (Fig. 2, not shown). The assembly is secured together by countersunk screws and nuts, and the escutcheon is mounted by removable screws 37, 42. The frame assembly may stand on other equipment, or support it, or be placed adjacent to it, without restriction of cooling air, and connecting cables may be stowed by wrapping round the rear guards.
Patent GB-280291-A (GB)
Title: Process and apparatus for the manufacture of hollow bodies from quartz and similar materials
IPC: C03B5/033
Filed: 1926-08-12
Abstract: 280,291. Carpmael, W., (I. G. Farbenindustrie Akt.-Ges.). Aug. 12, 1926. Fused silica. - Relates to a method of producing hollow bodies of quartz, or similar material, in which the hollow space is closed at one end. According to the invention, the quartz is fused by a tubular electric resistor a which has one end closed, one of the supply leads being connected to the open end while the other is connected to a stem c leading to the closed end. Instead of being tubular, the resistor may be in the form of a helix.
Patent GB-719744-A (GB)
Title: Improvements in and relating to a cabinet for sound reproducing apparatus
IPC: H04R1/02
Filed: 1952-08-07
Abstract: 719,744. Loudspeakers. LIEBERT, W.A. J. Aug. 7, 1952, [Aug. 7, 1951], No. 19937/52. Class 40 (4). [Also in Groups XXXVIII and XL(c)] In a gramophone, radio or television cabinet, a loud speaker 20 is mounted horizontally on a baffle board 22 and has its front and rear acoustic outputs reflected in the same lateral direction by two inclined sound boards 6, 9, one board being hinged so that its slope is adjustable. As shown, the hinged cover of a radiogram is adjustably inclined by supporting rods 7 and constitutes one sound-reflecting board 6. The other sound board 9, which may be curved, is fitted between the cabinet legs, and the loudspeaker is positioned between the boards in a cabinet compartment which has an apertured base 21.
Patent GB-911492-A (GB)
Title: Vehicle suspension systems
Inventor: DAVIES RAYMOND JOHN
IPC: B60G17/033
Filed: 1958-06-21
Abstract: 911,492. Adjusting body height. DUNLOP RUBBER CO. Ltd. June 1, 1959 [June 21, 1958], No. 19952/58. Class 108(2). In a pneumatic suspension system, the height of springs 1, 2, 3, 4 is regulated respectively by valves 12, 13, 14, 15, or, under certain circumstances, the valve 12 may; control both springs I and 2, whilst the springs 3 and 4 are separately controlled by valves 14 and 15. In the latter case the springs 1 and 2 are interconnected by a pressure line 25, in which there is a three-way cock 26. This cock is also located in a conduit 24 connecting the spring 2 to the levelling valve 13. In one position of the cock. the levelling valve 13 communicates directly with the spring 2 and connection between springs 1 and 2 is prevented, whilst in the other position of the cock the valve 13 is disconnected from the spring 2 which is put in direct communication with the spring 1 and the levelling valve 12. A delivery valve mechanism 10 permits either fast or slow flow of air to and from the springs. Inlet valve 27 allows air to flow from a high pressure tank 8 to the air springs whilst a valve 28 allows air to flow from the springs to a low pressure tank 22. When the vehicle is stationary or moving very slowly the valves 27, 28 are opened widely by a spring 29 to enable a speedy levelling response to be obtained. When the vehicle is moving more quickly a slower response is required and this is obtained by moving both valves to a nearclosed position which throttles the flow of fluid in both directions. This is brought about by a solenoid 31 which when energized holds the valves in the near-closed position. The three-way cock 26 is also operated by a solenoid 32, so that upon energization of solenoid 32 the cock is moved to a position which provides four point levelling. The cock is moved to its other position by spring means. Both solenoids are connected in series in a circuit which incorporates a switch operated by a centrifugal governor mechanism, so that when the vehicle is movng at more than a predetermined speed the switch closes the circuit and energizes the solenoid, thus changing over from three to four point levelling.
Patent GB-286154-A (GB)
Title: Vernier measuring instrument
IPC: G01B3/20
Filed: 1927-07-27
Abstract: 286,154. Borel, M. A., (Assignee of Challet, E.). June 11, 1927, [Convention date]. Measures of length.- A vernier measuring device comprises a scale a graduated in units with which co-operates a vernier divided for measurements to <1>/n and a second scale the length of the divisions of which is <a>/n which co-operates with a second vernier. In the sliding callipers, Fig. 1, the beam 1 has a millimetre scale a with which co-operates a vernier c ten divisions on which are equal to nine millimetres. The second scale b is graduated in tenths of millimetres and with it co-operates a vernier d ten divisions of which are equal to nine tenths of a millimetre. A magnifying glass 3 formed by a piece of semicylindrical cross section fixed by a mounting hinged on the axis 4 on the slider is arranged over this vernier. In a modification the first scale is in inches and tenths and the ten divisions of the vernier are made equal to nine tenths of an inch. The second scale is graduated for hundredths of an inch and the vernier gives the thousandth. The scales co-operate with two verniers disposed at different levels on the slider.