baber/WOPTO huggingface dataset:
Patent GB-599402-A (GB)
Title: Improvements in or relating to piano construction
IPC: G10C3/04
Filed: 1945-09-17
Abstract: 599,402. Pianofortes. STAPELY, G. H. Sept. 17, 1945, No. 23926. Convention date, Sept. 25, 1944. [Class 88 (ii)] A piano has metal posts fitted to the back of the metal frame or plate and bearing against fulcrum means to counteract the tendency of the strings to bend the plate. In one form, a metal frame 10, Figs. 4a and 4b, carries the wrest plank 13, a wooden top rail 14 and bottom rail 15. The stiffening posts 18 are of T-section and have toes 18d engaging in recesses in the top rail while their lower ends are held by wedges 27 which are driven in and held by screws. The line of greatest distortion lies approximately three-quarters of the way up the frame and a form of fulcrum is provided at this point by a beam 23 extending the width of the frame behind the soundboard 11 and pressing against a recessed part 18c of the post 18. The posts may be additionally secured to the frame at other points below the fulcrum. In a modification, Figs. 7a, 7b (not shown), the wooden rails are not used and the wrest plank is clamped between the posts and frame. In this case the top and bottom of the posts are bolted to the frame and the lower edge of the wrest plank acts as the fulcrum.
Patent GB-202852-A (GB)
Title: An improved construction of reversing gear for cotton carding engines and the like purposes
IPC: F16H3/00
Filed: 1922-09-04
Abstract: 202,852. Benson, R. Sept. 4, 1922. Reversing-gearing for cotton carding- engines. A driving-pulley 4, Figs. 1 and 4, is mounted loosely on the shaft and carries an internal gear 5, a gear 8 keyed to the shaft, and a plate 10 carries gears 12, 13 to engage the gears 5, 8, which is loose on the shaft but can be locked to the gear 8. The locking-device comprises dogs 14 slidable on the plate by screwed studs 8 mounted outside the plate. The dogs carry teeth which may be moved to engage the teeth of the gear 8 and projections 20 which, by movement of the dogs in the opposite direction, engage recesses 21 in a fixed cover-plate 22. The internal gear 5 is secured to the pulley 4 by arms or flanges. The smaller gear 13 is nearer the end of the shaft than the larger gear 12. The cover-plate 22 is in halves which are bolted together round the shaft- and is secured to the bearing bracket 2.
Patent GB-1305514-A (GB)
IPC: H02M7/527
Filed: 1971-04-19
Abstract: 1305514 Inverting BORG-WARNER CORP 19 April 1971 [24 March 1970] 23994/71 Heading H2F In an inverter, comprising at least one pair of thyristors 11, 12 connected in series across a D.C. source 25, 26 and having a centre-tapped commutating choke 30 connected between them, commutation is achieved by discharging one of capacitors 53, 54 through part of the commutating choke 30 and the conducting thyristor 11, 12 under control of an auxiliary switching device 57, 58. Anti-parallel commutating thyristors 57, 58 are preferably employed for respectively turning off thyristors 11, 12. Thyristor 11 is turned off by turning on thyristors 12 and 57 so as to discharge capacitor 54 through the commutating choke 30 until the current reverses, when thyristor 57 is also turned off. Components 35, 37 protect against high values of dv/dt; a selenium surge suppressor 34 is also included: reactive energy is recovered by diodes 38 ... 43 and transformer 38. The inverter may be pulse-width modulated.
Patent GB-1519488-A (GB)
Title: Device to measure the rate of flow for fill and draw systems with a facility to provide a signal for operation of flow proportional automatic samplers or alarm system
IPC: G01F13/00
Filed: 1976-09-03
Abstract: 1519488 Measuring fluid-flow T RAE 3 Sept 1976 [4 June 1975] 24020/75 Heading G1R Apparatus for measuring the flow through a vessel which discharges only when full, comprises means for measuring and recording the fill and empty times of the vessel, means for calculating the flow-rate using the fill or empty time, applying this to the total filling and emptying time to obtain the volume passed and means for adding this volume to a running total of previous volumes. The apparatus is used with dosing syphons for percolating filters in sewage disposal works.
Patent GB-852254-A (GB)
Title: Improvements in and relating to industrial gas-filtering plant
IPC: F16K1/22
Filed: 1957-07-30
Abstract: 852,254. Gas filters. BAINBRIDGE, C. A., and FARRINGDON WORKS & H. PONTIFEX & SONS Ltd. March 21, 1958 [July 30, 1957], No. 24084/57. Class 8(2). In an industrial gas-filtering plant in which the filter chamber and a portion of the gas escape conduit are located side by side, the gas is conducted from the filter chamber to the conduit by an inverted U-shaped passage provided by a bow-like enclosure 1 having an apertured partition 2, the right hand side of the portion being connected to the filter chamber and the left hand side to the conduit. The aperture 3 is controlled by a valve 5 rotatable on a shaft 4 which in its open position abuts the end of a tube and provided with a butterfly valve 8. To clean the filter the valve 5 is rotated to close the aperture 3 and the valve 8 is opened whereby atmospheric air can flow in a reverse direction through the filter. A cap 9 is adjustable on a screw 11 to control the air inlet passage to the pipe 6. Specifications 802,764, 852,255 and 852,256 are referred to.
Patent GB-814073-A (GB)
Title: Catalytic oxidation of methanol and catalyst and catalyst precursor therefor
IPC: C07C47/04
Filed: 1955-08-22
Abstract: An inactive catalyst precursor suitable for conversion to an active catalyst for the oxidation of methanol to formaldehyde (see Group IV (b)) is prepared by mixing an aqueous solution of an iron salt with an aqueous solution of a molybdate and partially drying the precipitate; the mixture of solutions should have a pH of 0.5-3.5 and the precipitate a molar ratio of MoO3 to Fe2O3 of 3.3:1 to 11.2:1. The catalyst precursor has good mechanical strength and is stable during storage and transport.  Suitable iron salts are ferric chloride, bromide, acetate, and sulphate and ferrous chloride and acetate; suitable molybdates are ammonium, potassium, and sodium molybdates, and molybdates of organic amines.  Trace amounts of Al, Ca, Cr, Co, Mg, Ni and Si in the catalyst precursor are not harmful. The molybdate solution should preferably be adjusted to a pH of 2.25 to 5.0 by addition of hydrochloric or hydrobromic acid.  After washing and filtering the precipitate is dried, preferably in stages at increasing temperatures up to 300 DEG  F. to a water content of 2-30 per cent.  In examples: (1) a solution of sodium molybdate, made by dissolving molybdenum trioxide in sodium hydroxide solution, is treated with concentrated hydrochloric acid to a pH of 5 and then added to ferric chloride solution of pH 1.7; the precipitate is washed, filtered and dried; (2) a solution of ammonium molybdate is adjusted to pH 2.25 with hydrochloric acid and is added to ferric chloride solution, the precipitate being treated as in (1).  In each example the product is loaded into the tubes of a converter and an active catalyst formed by heating to a temperature of 500 DEG  F. in a stream of air, which may be dehydrated, until all water and volatile substances are removed.  U.S.A. Specification 1,913,405 is referred to.ALSO:Formaldehyde is prepared by passing methanol and an oxidizing gas through a catalyst formed by heating at 300-495 DEG  F. in the presence of air a catalyst precursor which has been produced by mixing an aqueous solution of an iron salt with an aqueous solution of a molybdate and partially drying the precipitate; the mixture of solutions should have a pH of 0.5-3.5 and the precipitate a molar ratio of MoO3 to Fe2O3 of 3.3 : 1 to 11.2 : 1 (see Group III).  A mixture of 9 per cent methanol and 91 per cent air may be passed at 480 DEG  F. through parallel tubes containing the catalyst. A suitable arrangement of apparatus is shown diagrammatically. U.S.A. Specification 1,913,405 is referred to.
Patent GB-176292-A (GB)
Title: An improvement in boxes for holding tailors' chalk and the like
IPC: A41H23/00
Filed: 1921-09-13
Abstract: 176,292. Burnside, A. M. Sept. 13, 1921. Boxes combined with cutters; boxes formed of separate bodies or shells combined in tiers. - A box for holding a piece of tailor's chalk 4 has a cutter 3 secured to some part of its inner surface so as to project upwardly at right angles to the bottom. The box may be partitioned in line with the upright part 6 of the cutter, to form a compartment for the chalk scrapings. The part 6 may be hinged to the foot 5, the box bottom then being recessed to accommodate the folded cutter. A compartment for pins &c., closed by a lid, may be formed on the underside of the box bottom.
Patent GB-1129758-A (GB)
Title: Improvements in or relating to set-off devices forpowdering wet printed paper sheets
IPC: B41F23/06
Filed: 1966-06-01
Abstract: 1,129,758. Set-off preventing. ADAMOVSKE STROJIRNY NARODNI PODNIK. 1 June, 1966 [10 June, 1965], No. 24333/66. Heading B6C. A set-off device for applying air-entrained powder to wet printed sheets in a measured quantity per sheet, -comprises a body 1, a powder container 7, a head 2 for the container, a piston 3 and an adjustably spring-loaded cone valve 9. The body 1 is connected to a compressed air supply through 'an inlet 14 the supply being controlled in an off-on sequence by an interupter connected to the printing machine drive. The body incorporates a cylindrical bore 17 which houses the valve 9 and a cylindrical bore 4 and which has two different cross-sections and accommodates the piston 3 resting upon an adjustable screw 6. The piston is double acting and comprises parts 31, 3<SP>11</SP>. The bore 4 communicates with the bore 17 through a passage 19 and has two outlet ports 23, 20. The port 23 is fitted with a nozzle 5 and is connected to a tube 8 reaching into the container 7. The port 20 discharges into a mixing channel 21 located in the container head 2 and communicating with the latter by a port 22. In operation, the air necessary for one powder dose lifts the cone valve 9 and passes to the container through the passage 19 and the port 23. The air pressure between the piston parts 3<SP>1</SP>, 3<SP>11</SP> lifts the piston 3 closing the port 23 whilst opening the port 20. The remainder of the air dose is therefore able to enter the mixing channel 21 and to pass, together with powder dose supplied through the port 22, through the outlet 15 to the powdering nozzles (not shown).
Patent GB-532281-A (GB)
Title: Improvements relating to machines for impressing address printing plates
IPC: B41J3/38
Filed: 1939-08-24
Abstract: 532,281. Embossing. ADREMA MASCHINENBAUGES. Aug. 24, 1939, No. 24359. Convention date, Sept. 29, 1938. [Classes 83 (ii) and 83 (iv)] Making dies.-Die-heads for machines for embossing thin sheet metal plates for printing addresses have a diecast or pressed light metal hub portion 1 having an annular groove and two cast rings 2, 3 having sockets 9 for the relief and intaglio punches. Transverse holes 10 are drilled, by means of a jig, to receive spring pressed pins to retard the movement of the punches in the sockets. The holes for the fixing screws 6 are diecas.t but are afterwards tapped.
Patent GB-1000617-A (GB)
Title: Improvements in or relating to ball and like joints
Inventor: CARTER VICTOR LEONARD
IPC: F16C11/06
Filed: 1963-06-19
Abstract: 1,000,617. Pivotal joint. ALFORD & ALDER (ENGINEERS) Ltd. April 27, 1964 [June 19, 1963], No. 24459/63. Heading E2F. A pin or shackle joint or as shown a ball joint is provided with a rubber or plastic bellows seal 22 and is lubricated under pressure through a nipple 20 provision being made for reducing undue stress on the seal 22 due to excessive internal lubricant pressure by means of a vent 27 communicating with a bearing surface and closed by a valve 28, formed by a disc of stiff plastic material held beneath the head of the nipple 20, but opened when internal pressure becomes excessive. Lubricant is forced into the nipple 20 and through a passage 21 to a central lubricant passage 18 formed within a lower lining 17 beneath the ball and from the passage 18 radial lubricant passages 19 in the liner extend upwardly into a space 25 formed between an upper liner 16 and a lower liner 17. The space 25 is connected to the vent 27 by a vertical groove 26 in the lower lining 17 to complete the lubrication circuit.
Patent GB-649185-A (GB)
Title: Improvements in or relating to selector switches
IPC: H01H63/04
Filed: 1947-09-05
Abstract: 649,185. Automatic exchange switches. STANDARD TELEPHONES & CABLES, Ltd. Sept. 5, 1947, No. 24505. Convention date, Sept. 14, 1946: [Class 40 (iv)] The brushes of a singlemotion selector are resiliently mounted on the brush car. riage. As shown in Figs. 1, 4 and 5, the brushes each comprise complementary segments 32 with lateral extensions 36, 37. The brushes are secured to non-conducting brush holders 43 by springs 44 which clamp together the extensions and backing strips 41. Brush holder trunnions 63' engage holes 64, Fig. 13, in resilient mounting blocks 61, 62 which are formed of synthetic or natural rubber and are attached to the brush carriage 27 by spring clips 66. The brush carriage is attached to a frame 24 slidably mounted on two parallel rods 17. The upper and lower contact tips 56, 57 of each of the brushes engage a feeder bar 31 and fixed contacts 35 respectively. Each feeder bar is secured to non-conducting arms 76, 81 which are resiliently attached to the switch frame 22 by screws 74 engaging resilient bushes 82. The upper brush contact tip 56 is cleaned by sloping notches 86, 87 in the feeder bar and by disengagement of the contacts from the bar at shoulders 88, 89 as the brush carriage nears the ends of its reciprocatory movement. In a modification, Fig. 9 (not shown), the complementary brush segments and backing strips are riveted together and the brush holder 43 omitted. In this case the mounting trunnions are formed by extensions of the backing strips.
Patent GB-302632-A (GB)
Title: Spindle and movable bed supports for grindstone turning machine
IPC: F16M5/00
Filed: 1927-09-19
Abstract: 302,632. Camplin, E., and Camplin, O., (trading as Seal & Sons, S.). Sept. 19, 1927. Turning. - A grindstone is held in a turning machine by means of an upright steel spindle 3 held by a cotter 4b in a socket 4 fixed to the bed plate, which carries a set of supports 5 adjustable in holes 5a. A cotter 4<a> holds the stone firm.
Patent GB-1099536-A (GB)
Title: Ignition circuit
IPC: F02P3/08
Filed: 1965-06-10
Abstract: 1,099,536. Ignition systems. TUNC-SOL ELECTRIC Inc. June 10, 1965 [June 22, 1964], No.24602/65. Heading F1B. An ignition system comprises a first charging circuit connected across a source of current including in series an inductor 20 and a first silicon controlled rectifier 24 and breaker contacts 12, 13 connected across the anode and cathode of the silicon controlled rectifier, and a second charging circuit connected across the source and including in series the primary winding 26 of a charging transformer 25, a voltage divider 31 and a gate controlled switch 30. A second silicon controlled rectifier when in a conductive state causes the discharge of a storage capacitor 34. A first coupling circuit is connected between a mid-point on the voltage divider and the control electrode of the first silicon controlled rectifier for making the rectifier conductive when current through the primary winding of the charging transformer reaches a predetermined value. A second coupling circuit is connected between one end of the inductor and the control electrode of the second silicon controlled rectifier 40 for making the second rectifier conducting when the breaker contacts are opened. A third coupling circuit is connected between one end of the inductor and the control electrode of the gate controlled switch for making the switch conductive when the breaker contacts are opened and for making the switch non-conductive when the current through the inductor is cut-off. A storage capacitor discharge circuit for discharging the capacitor 34 and generating a spark at one of the plugs 18 includes the primary winding 36 of an output transformer and the anode-cathode circuit of the second silicon controlled rectifier. In a modification the inductor 20 is replaced by a transformer.
Patent GB-425761-A (GB)
Title: Flashlight and shutter operating device for camera
IPC: G03B15/04
Filed: 1933-09-06
Abstract: 425,761. Flashlight photography. SCHWARTZ, M., 147, Barbey Street, Brooklyn, New York, U.S.A. Sept. 6, 1933, No. 24697. [Class 98 (i)] In a device for operating the shutter of a camera and closing the circuit of an electrical flashing device, the shutter is opened at such time after the closing of the circuit of the flashing device that the period during which the shutter is open includes the period of maximum illumination of the flashing device. The device consists of a casing 23 having a tubular extension 30 carrying a sleeve 46 having a threaded end for attachment to the shutter casing in place of the usual cable release, and a threaded opening 33 to receive the release 16. Terminals 80, 81 for the flashlamp are provided on the casing 23. A plunger 36 having a compression spring 41 is mounted in the tubular extension 30 and is provided with a pin 50 for retracting it and a bell-crank lever 53 pivoted inside the casing to hold the plunger in retracted position. A disc 62 tending to rotate in a clockwise direction under the influence of a spring 62<a> is mounted in the casing and provided with a winding knob. The disc 62 is held from rotation by a finger 66 on a pivoted lever, the opposite end of which is in contact with the end of the cable release 16. Upon operation of the release, a pin 71 on the disc 62 moves in a clockwise direction till it engages the tail 57 of the lever 53 to release the plunger 36. The terminal 80 is earthed to the casing and the terminal 81 insulated therefrom and engages a ring bearing a pin and carried by a disc held on the casing by screws so that the position of the pin may be adjusted relative to a finger 94 on a ring 92 connected to the hub of the disc 62 by a spring 95. Release of the disc 62 allows the ring 92 to rotate until the finger 94 engages the pin 100 thereby closing the circuit of the flashlamp. In a modification, the trigger 50 of the plunger is dispensed with, an inwardly pointing arm being provided which engages the pin 71 to retract the plunger.
Patent GB-171508-A (GB)
Title: A new or improved process of manufacturing endless tubes from rubber compound or thelike
IPC: B29D23/24
Filed: 1920-08-26
Abstract: 171,508. Creassey, F. Aug. 26, 1920. No Patent granted (Sealing fee not paid). Air-tubes, making. - In joining up the ends of a length of unvulcanized rubber &c. tubing, the ends are held together and supported in the joined position by providing internal pressure at the joint prior to inflating the tube for vulcanization. In the arrangement shown in Fig. 3, a small inflatable balloon G is fitted inside the lap-joint. In the modified joint shown in Fig. 4, the stepped ends of the tube 1 are covered by wrappings 5. In a further modification, a butt-joint is reinforced by a short tubular liner.
Patent GB-504008-A (GB)
Title: Improvements in or relating to delay action mechanisms for photographic shutters
IPC: G03B9/58
Filed: 1937-10-21
Abstract: 504,008. Shutter mechanism for photographic cameras. KODAK, Ltd. (Mihalyi, J.) Oct. 21, 1937, No. 24764/38. Divided out of 497,302. [A Specification was laid open to inspection under Sect. 91 of the Acts, May 2, 1938.] Drawings to Specification. [Class 98 (i)] In a photographic shutter having a delay action device, the rotation of an annular master driving member to set position, positions a recess therein to enable the adjustment of a setting member to set position where it is retained by a latch until the shutter trigger is actuated, which actuation disables the latch to permit spring-restoration of the setting member under the control of a gear retard train and, finally, the release of the master member to effect an exposure. The mechanism is identical with that described in Specification 497,302.
Patent GB-367792-A (GB)
Title: Improvements in and relating to methods of introducing barium into electrical discharge receptacles
IPC: H01J9/395
Filed: 1930-08-19
Abstract: Commercially pure barium to be introduced into electric discharge tubes is treated to distribute the remaining impurities evenly so as to avoid the usual rapid attack by air due to the distribution of the impurities in layers in the commercial metal. The metal, preferably of a purity of at least 98 per cent, is fused, or heated to just below its melting-point, for a considerable time in a current of rare gas and is then rapidly cooled to below 400 DEG  C, for example, the metal is heated in a steel receptacle which is quenched in water. The treatment may be carried out in small nickel or molybdenum receptacles subsequently introduced into the discharge tubes or in recesses in the electrodes.  Alternatively, the metal is distilled in vacuo or in a rare gas in a chamber raised quickly above 1150 DEG  C. The metal so treated is not rapidly attacked in air, and slow attack at the surface may be avoided by a coating of paraffin oil or other material vaporizing without decomposing when the tube is evacuated. The coated metal may be rolled or pressed into ribbons or filaments and again coated with paraffin oil.  The coated metal may also be ground to a paste and compressed into tablets.  Specifications 325,492 and 325,534, [both in Class 39 (i), Electric lamps, Arc &c.], are referred to.
Patent GB-1392068-A (GB)
Title: Electrical converter apparatus
Inventor: JENSEN A
IPC: H02M3/137
Filed: 1972-05-25
Abstract: 1392068 Inverting systems DANFOSS AS 25 May 1972 [25 May 1971] 24825/72 Heading H2F [Also in Divisions G3 and H3-H4] Apparatus for supplying a desired A.C. to a load, e.g. motor 2 comprises a controllable D.C. supply unit 3 having a constant D.C. supply input Vi and comprising a pulse controlled switching diode SW for controlling the flow of current through the device 3 in an on/off manner, and a filtering and smoothing circuit L, C 1  adapted to supply a constant D.C. output Vu having a magnitude dependent upon the switching frequency and the mark-space ratio of the signals applied to the element SW, to an inverter 1 controlled by an inverter switching pulse generator 8, the inverter supplying A.C. to the motor 2 at a frequency dependent upon that of the pulses generated at 8, the frequency of the generator 8 being controlled in turn by a D.C. voltage derived from Vu via a potential divider R 1 , R 2 , this control signal also being applied to a comparator circuit 9 together with a signal 10 indicative of a desired speed of the motor 2, where a signal O i  is produced to control a circuit 11, 12 which supplies the switching pulses to the diode SW, the circuit 11, 12 adapted so that a variation in the signal O i  brings about variations in both the switching frequency and mark-space ratio of the output pulses O 0  (see Divisions H3-H5). It is stated that owing to internal effects, the pulses applied at SW may interfere with the pulses applied to the inverter and at certain frequencies of operation of the load the output from the inverter will be unstable. The output from the circuit 11, 12 is such that at low voltage outputs Vu, the switching frequency is small and the duration of the output pulses is also small, and as the voltage output Vu increases this frequency increases to a maximum and then falls, the duration of the pulses becoming longer . The slope of this frequencyagainst output voltage Vu curve ensures that the range of output voltages Vu over which interference may cocur is reduced and hence so too is the range of inverter output frequencies.