baber/WOPTO huggingface dataset:
Patent GB-1422671-A (GB)
Title: Step stool structure
IPC: A47C12/02
Filed: 1973-06-29
Abstract: 1422671 Combined steps and stool CRAMER INDUSTRIES INC 29 June 1973 31019/73 Heading E1S [Also in Division A4] A step stool comprises a hollow base 2 having a top wall and a peripheral wall extending downwardly and outwardly therefrom, an up standing super structure 3 mounted on the base, spaced from the front end and having side walls 17 inwardly of the side edges 18 of the base, a plurality of steps including a step 6 formed by a portion of the base top wall in front of the superstructure 3, a top step formed by a platform 4 on the upstanding structure 3, and one or more intermediate steps 7 within the structure 3 and a floor-engaging rim member 12 around the bottom of the peripheral wall. The base has resiliently mounted castors whereby it may be moved freely when under no load, but the floor-engaging member 12 is brought into frictional contact with the floor when a user mounts the steps. Hand-hold posts 5 may be fitted in sockets in the platform 4 or base 2, and a shelf 68 for articles may be fitted to the tops of two such posts 5. The steps have non-slip surfacings. A seat structure for fitting to the platform 4 is described.
Patent GB-1419148-A (GB)
Title: Mining machine
IPC: E02F3/18
Filed: 1973-06-29
Abstract: 1419148 Mining machines VEREINIGTE OSTERREICHISCHE - EISEN-UND STAHLWERKE-ALPINE MONTAN AG 29 June 1973 [30 June 1972] 31055/73 Heading E1F A mining machine of the type having a cutting tool 3 mounted on a jib arm 2 extending from a crawler tracked base is provided with a loading apron 4 whose forward inclined edges 7 may be pivoted about axis 5 by hydraulic rams 25 below the level of the ground engaging tracks; the edges 7 lying in a plane which is coincident with a flat ground surface when the apron is depressed to raise all but the rear of the base off the ground. A supporting device 18 mounted on the rear of the base comprises a hydraulically actuated shoe 19 which may be swung down to raise the rear of the base from the ground.
Patent GB-870063-A (GB)
Title: Improvements in or relating to electric circuits for generating an output voltage which is approximately proportional to a function of an input voltage
IPC: G06G7/22
Filed: 1958-09-29
Abstract: 870,063. Analogue electric-calculating systems. GENERAL ELECTRIC CO. Ltd., and WALKER, P. M. Sept. 28, 1959 [Sept. 29, 1958], No. 31103/58. Class 37. In an arrangement for generating sine or cosine functions of angles greater than Œ#/2, an adding circuit 5 which comprises an amplifier 12 having a condenser 13 connected in its feedback path fed from a pair of paths 3, 4 to which voltages of the same value as the input voltage but of opposite polarity are applied, and terminating in the change-over contacts of a respective pair of change-over switches S1, S2, responsive to the adding circuit output voltage, is provided in the input to a function generator, such as a sine or cosine generator, having normal operation only between predetermined input limits, i.e. voltages corresponding to Œ#/2. Path 3 includes a sign reversing arrangement 6, 8, 9, whereby the polarity of the input at terminal 1 is reversed and the output at terminal 2 which is the difference between the voltage stored in condenser 13 and the voltage applied over switch S1 or S2 is applied to an adding amplifier 35 through two parallel paths 31, 34, the former of which includes a limiter 39 whereby the voltage in that path only is limited when the output exceeds the predetermined limit, an output being developed in amplifier 35. The con. nections to paths 31, 34 from terminal 2 include a sign changer 21, and four diodes 18, 20, 28, 29 for dealing with different polarities of voltage at terminal 2. A monostable trigger circuit 48 which responds to the output from amplifier 35, changes over a bi-stable trigger circuit 62 which includes a high-speed, centrestable polarized relay S operating the contacts S1, S2 to cause further increases in the input to result in the connection of a voltage of opposite polarity until the other limit is reached. The bi-stable arrangement is cyclically changed-over as the output voltage reaches its upper and lower limits. Specification 855,303 is referred to..
Patent GB-359200-A (GB)
Title: Improved fountain pen
IPC: B43K5/00
Filed: 1930-10-17
Abstract: 359,200. Reservoir pens. MABIE, TODD, & CO., Ltd., 133, Swan House, Oxford Street, London. Oct. 17, 1930, No. 31142. [Class 146 (iii).] A reservoir pen for use with a deskset has the tapered extension of the barrel, usually provided with such pens, formed detachable and connected to the barrel by a dowel and socket, non-detachable means being provided for obscuring the socket when the extension is removed so as to adapt the pen for pocket use. As shown, the extension 2 is provided with a dowel adapted to screw into a socket 4 in the end of the barrel 1. The socket is closed, when the extension 2 is detached, by a plug 5 carried by a plunger 6 slidable in the end of the barrel under the influence of a spring 10 bearing against a fixed disc 8. The end of the plug 5 may be provided with a tip 11 coloured to match the barrel or ornamented. According to the Provisional Specification, the dowel may be formed on the barrel and the socket in the extension.
Patent GB-968643-A (GB)
Title: Improvements in and relating to thermoplastic valve bags
IPC: B65D30/24
Filed: 1962-08-14
Abstract: 968,643. Welding on thermoplastic valve bags; seaming non-metallic sheet material. DU PONT OF CANADA Ltd. Aug. 14, 1962 [Sept. 21, 1961], No. 31142/62. Drawings to Specification. Headings B5D and B5K. [Also in Division B8] To prevent undesired welds on a thermoplastic gusseted valve bag (see Division B8) printing may be applied to the interior of the valve and on the gussets at those places where welds are not required. Specification 955,618 is referred to.
Patent GB-174754-A (GB)
Title: Improvements in control levers for operating flexible wires
IPC: F16C1/18
Filed: 1920-11-03
Abstract: 174,754. Rolph, W. M. Nov. 3, 1920. Bowden mechanism.-A flexible wire g, which may be of the Bowden type, is connected by a trunnion bearing h to a lever k, which can be turned about a pivot b in either direction to pull the wire. The lever comprises an operating- handle a in line with the bearing h on the opposite side of the pivot b. The bearing h comprises a socket and T-shaped attachment for the wire with axis parallel to the axis of the pivot b. The pivot b is part of a casing c, and the lever k is held down by a spring d, washer e, and screw f. The movement is limited by stops j.
Patent GB-887156-A (GB)
Title: Timing pulse generator
IPC: H03K3/013
Filed: 1959-09-14
Abstract: 887,156. Magnetic core pulse-generating circuits. SPERRY RAND CORPORATION. Sept. 14, 1959 [Sept. 12, 1958], No. 31319/59. Class 40 (9). [Also in Group XL (c)] The remanent state of a magnetic core 32 having a rectangular hysteresis loop is repeatedly reversed by an alternating signal, the switching rate from one state to the other being very much less than the switching rate in the opposite sense so that small and large amplitude pulses are induced alternately in an output winding 37. The alternating signal is derived from the reading head 13 of a magnetic drum 10 having regularly-spaced magnetized spots 12, and is applied by way of amplifying PNP junction transistors 16, 17 and a centre-tapped transformer 20 to a push-pull circuit comprising transistors 24, 25 and input windings 28, 31 on the core 32. The switching rate of the core 32 during the positive half-cycles 41 of the alternating signal, Fig. 2(a), is considerably reduced by a resistor 27 which limits the collector current of transistor 24. No collector current limitation is used in the collector circuit of transistor 25 so that rapid core switching takes place at the commencement of the negative half-cycle 42. The corresponding positive and negative output voltages 44, 45 produced by the core 32 are shown in Fig. 2 (b), the small positive output 44 being finally suppressed in the output circuit by a biased rectifier 33, 34. It is stated that each signal alternation is followed by a quiescent period during which noise 43, Fig. 2 (c), is generated, and that this noise is suppressed by the combined effect of current limiting resistor 27, the biased rectifier 33, 34 and the marginal switching characteristic of the core 32 due to its coercivity. As an alternative to resistor 27, the transistors 24, 25 may have different gains. Also the transistors may be replaced by thermionic valves.
Patent GB-1080641-A (GB)
Title: Light intensifiers for radiations
IPC: H01L31/14
Filed: 1964-08-04
Abstract: <PICT:1080641/C4-C5/1> A light intensifier comprises a layer of fluorescent material having indentations therein and provided with an electrode on the ridges of the indentations and a covering layer of a photo-conductive material, an electroluminescent layer and a photo-transparent electrode. The intensifier may be sensitive to X or g -rays.  A light intensifier is built up of a lead-containing glass support 1, a transparent tin oxide electrode 2 sprayed on to the support, an electroluminescent layer 3 comprising, ZnS [Cu, Al] bonded with an epoxy resin, an insulating or semi-conducting opaque layer 41 of black paint, a current diffusing layer 42 of a powder of non-linear resistance, e.g. a mixture of cadmium sulphide and chloride bonded with an epoxy resin; a fluorescent layer 50, e.g. ZnS [Ag] bonded with an epoxy resin or polystyrene having parallel grooves 52 therein; and a photo-conductive layer 7, e.g. a mixture of CdS and Cu Cl.  An A.C. source is connected to the device by lead 10 to layer 2 and by lead 8 to electrodes 6 formed by silver paint on layer 50.  The layer 7 may fill the grooves 52 whilst circular or spiral grooves may be used.  In another embodiment (Fig. 2, not shown), the grooves 52 are replaced by circular pores whilst the electrodes 6 may take the form of a net.  The materials forming the various layers may be sintered rather than bonded by an adhesive. X-rays incident on layer 7 pass through it and produce orange light in layer 50 which excites the photo-conductive layer 7.
Patent GB-1492998-A (GB)
Title: Connector assemblies
IPC: H01R13/64
Filed: 1975-07-28
Abstract: 1492998 Two part coupling HUGHES AIRCRAFT CO 28 July 1975 [29 Aug 1974] 31499/75 Heading H2E [Also in Division G2] A two part coupling comprises a one piece plug 10, a one piece receptacle 62 comprising a split shroud 84 having detents 90 engageable in an annular recess of the plug shroud 12, and a locking collar 46 which is moved forward over the shroud to engage in groove 38 and prevent separation. More than one contact may be provided within the preferably plastics bodies and the shroud 84 may have a slot pattern cooperable with projections on the plug for orientated mating. The connector is said to be suitable for both electrical and optical applications.
Patent GB-829540-A (GB)
Title: Process for the separation of n-paraffins from hydrocarbon oils
Filed: 1958-10-02
Abstract: In the separation of n-paraffins from other hydrocarbons by adduct formation with aqueous urea containing 10-40 weight per cent of water, the formation of adduct is effected in two stages, the second at lower pressure than the first.  The process is preferably effected in an oil solvent, e.g. methylene chloride, difluorodichloromethane, cyclohexane or dichloroethane, the pressures being chosen so that at the lower pressure the boiling points of the solvent is exceeded. The grain size of the resultant adduct can be increased by stirring with an oil not capable of adduct formation or with water preferably containing urea.
Patent GB-730904-A (GB)
Title: Improvements in or relating to printing telegraph apparatus
Inventor: TEDHAM LESLIE THOMAS
IPC: H04L17/20
Filed: 1952-12-12
Abstract: 730,904. Type-printing telegraphy. CREED & CO., Ltd. Dec. 4, 1953 [Dec. 12, 1952], No. 31560/52. Class 40 (3). In a printing reperforator, the members of the taper-perforating mechanism are connected by Bowden cables to associated notched discs set in accordance with the elements of the received signals. A link 1 operated by a cam 2 traverses a striker pin in front of a number of fingers selectively positioned below projections 4 on the notched discs 5. The fingers 4 engage pivoted bell-cranks 6 attached to Bowden cables 8 connected to bell-cranks 11 operating sliding members 12 carrying interponents co-operating with the pivoted block and punchpins of a tape-perforating mechanism. When the discs 5 have been set a lever 13 connected to the link 1 operates a trip link 14 and via an intermediate lever 15 operates a Bowden cable 16 which through lever 17 and bar 18 pushes a rod 19 to the right, rocking detents 21 to release for half-revolution the perforator cam sleeve 22 operating punch head 23 so that pins 25 obstructed by the selectively set interponents 12 perforate the tape carried in the head 23. Suppression of perforation of bell, " who-areyou ? " and answer-back signals. The selector bar 27 selected by the bell signal allows a lever 28 to rotate and rock a lever 26 which lifts the link 14 so that the trip lever 15 is not actuated. In similar manner, Fig. 7 (not shown), the selector bar corresponding to " who-are-you ? " rotates the lever 26 to prevent the operation of the lever 15. A cam on the shaft of the answer-back drum rocks a lever, Fig. 8 (not shown), to move the universal bar to lock the keyboard against operation during the transmission of the answer-back signal. The lever also actuates a linkage to rock the lever 26 which prevents the release of the perforator cam sleeve 22. The discs 5 may be positioned by the mechanism described in Specification 681,209.
Patent GB-1497553-A (GB)
Title: Method of making rotary cutters
IPC: B24D13/10
Filed: 1975-07-29
Abstract: 1497553 Brushes VSES NI INST PO STROITEL MAGISTRAL TRUBOPROVODOV 29 July 1975 31697/75 Heading A4K [Also in Division B 3] A method of making a rotary brush milling cutter comprising radially projecting wires, includes making blanks of corrugated wire 1, stacking the blanks, pressing them together, securing the inner ends and cutting the loops off the outer ends to form a working surface, the ratio of the area of the working surface filled with the free ends of the wires to the total area of the working surface being within the range of 0.05 to 0À7
Patent GB-386747-A (GB)
Title: Improvements in and relating to wringers, mangles and washing machines of like type
IPC: D06F45/18
Filed: 1931-11-16
Abstract: 386,747. Mangles, wringers, and washing-machines. ROY, W. G., 16, Newstead Road, Lee, London. Nov. 16, 1931. Nos. 31701/31 and 1087/32. [Class 138 (ii).] In a folding mangle or wringer or washing- machine having similar rollers, the rollers are driven by a treadle h, Fig. 1, which may operate a rack k which meshes with a pinion l on a shaft l<1> on which a flywheel l<2> and sprocket wheel l3, Fig. 3, are also secured. A free-wheel device is arranged between the pinion l and the shaft l<1> to transmit only the motion due to the downward movement of the treadle and a spring j restores the treadle to its raised position. The sprocket wheel l<3> drives another sprocket wheel l<5>, Fig. 5, on a shaft e about which the roller frame pivots and the drive is transmitted to the rollers through gear wheels m, m<1>. To permit a reverse drive to be transmitted to the rollers the gear wheel m<1> may be loose on the lower roller shaft d<2> on which a sprocket wheel n2 is also loosely mounted. The sprocket wheel n<2> is driven by a chain n<1> from a sprocket wheel n on the shaft e and either the sprocket wheel n<2> or the gear wheel m<1> may be clutched to the roller shaft d2 by means of a manually controlled clutch o. Alternatively teeth may be omitted from the bottom of the rack and the roller shaft may be provided with a squared end d3, Fig. 1, to receive a hand-driving crank for rotation in the reverse direction when the toothless portion of the rack registers with the pinion l. The driving crank may if desired be left permanently on the shaft d<2> and may be slidably mounted thereon. The treadle may be provided with two half-bearings for alternative engagement with the pivot pin h<1>, the rear half-bearing engaging the pin when the rollers are to be operated and the front halfbearing engaging the pin when the machine is inoperative so that the treadle does not project beyond the frame. In a modification the motion of the treadle is converted by means of a crank on the flywheel and a connecting-rod, and in another modification a chain or other flexible member is anchored to the periphery of the free-wheel member and to the treadle and winds up and unwinds as the treadle rises and falls. When the machine is driven by a crank and connecting-rod a lost-motion device may be provided in the transmission gear such that the drive is not transmitted to the rollers until after the flywheel has acquired sufficient momentum and means are then provided for restoring the lost-motion connection, after the machine has stopped, in readiness for the next starting thereof.
Patent GB-1012975-A (GB)
Title: Hydraulic drive arrangements
Inventor: BERKMAN IOSIF L VOVICH
IPC: F15B1/02
Filed: 1963-08-12
Abstract: 1,012,975. Hydraulic transmissions. VSESOUZNY NAUCHNO - ISSLEDOVATELSKY INSTITUTE STROITELNOVO I DOROZHNOVO MASHINOSTROENIYA. Aug. 12, 1963, No. 31704/63. Headings F2C and F2D. In a hydrostatic transmission for slewing a crane wherein a pump 1 supplies pressure liquid to a motor 3 through a valve 26, an accumulator 5 is connected through a shut-off valve 21 to the high-pressure line to store energy during motor reversal and an accumulator 6 which is maintained one-third full by a make-up pump 2 is provided in the low-pressure line 34. The speed of the motor 3 is, as shown, controlled by a manually operated by-pass valve 33, but may additionally be controlled by providing a variable displacement pump 1. When the accumulator 6 is one-third full it closes a switch 8 to energize a solenoid operated valve 10 which opens a valve 12 to connect the delivery of the pump 2 to the reservoir. A switch 7, which is closed when the accumulator 5 is full, energizes a solenoid-operated valve 9 which opens a bypass valve 11. The five position control valve 26 has a central motor braking position in which the motor draws liquid from the low-pressure accumulator 6 through one-way valves 24 and discharges through one-way valves 25 to the high-pressure accumulator 5. Two intermediate idle positions in which the motor draws from and discharges to the accumulator 6 and extreme end forward and reverse drive positions. When use of the accumulator 5 is not required, valves 21, 22, 23 are closed. When the valve 22 is closed overrun of the motor 3 is prevented by a valve 29 which closes to block the motor outlet when the motor outlet pressure exceeds the inlet pressure. A filter 4 is provided in the circuit and high-pressure relief valves 27, 28 between the low and highpressure motor lines prevent excess pressure in the circuit. The accumulators 5, 6 are provided with pressure gauges 13, 14 and drain cocks 17, 18.
Patent GB-810464-A (GB)
Title: Improvements in or relating to pneumatic tools
IPC: B25D17/24
Filed: 1955-11-07
Abstract: 810,464. Percussive tools. JOCHUMS, A., and WITTKOP, E., [trading as HAUINCO MASCHINENFABRIK G. HAUSHERR JOCHUMS & CO.]. Nov. 7, 1955 [Nov. 12, 1954], No. 31750/55. Class 124. A pneumatic percussive tool has a buffer of rubber or rubber-like material constructed as a cap one part of which surrounds the forward end of the piston cylinder and another part is disposed radially inwardly in front of the cylinder, the buffer being arranged between the cylinder and a steel-retaining cap and acting as a resilient stop for the steel. As shown, the forward end of a piston cylinder 2 has fitted, in a part 10 of smaller external diameter, a rubber buffer 11, the free end 13 of which is located in front of the cylinder and the aperture therein is slightly greater than the diameter of the piston extension 17. The buffer 11 is maintained in position by a steel-retaining cap 3, screwed on to the front of the cylinder. In a modification, Fig. 2 (not shown), the cylinder bore may be parallel to the end and a washer may be arranged in the steelretainer to prevent escape of gas, which gas acts as a cushion.
Patent GB-263165-A (GB)
Title: Improvements in distributing valves for regenerative ovens or furnaces heated by gas
IPC: F23L15/02
Filed: 1926-12-15
Abstract: 263,165. Naamlooze Vennootschap Silica en Ovenbouw Maatschappij, (Assignees of Otto & Co., Ges., Dr. C.). Dec. 16, 1925, [Convention date]. Valves. reversing. - A distributing valve for gas-heated regenerative, furnaces or opens comprises a valve box a communicating with an air regenerator through channels n and through valves c, d, o with a waste heat flue m, a second valve box b, and the atmosphere respectively. The valve c is provided with guides c<1>, and when a rod e is lifted both valves c, d are raised by collars f, g on the rod. while the upper valve d may be lifted independently of the valve c by a sleeve h fixed to the valve disc and passing through a stuffing box i; this sleeve may be retained in its upper position by a pawl k. The upper valve box b communicates with a channel p leading to the gas regenerator and having a branch p<1> for the supply of lean gas. As applied to a coke oven heated by lean gas the branch pipe p<1> and the valve o are opened and the valves c, d closed; lean gas flows from the pipe p<1> through the channel p to the gas regenerator and air enters at a<4> and passes through the conduits n to the air regenerators. On reversal the branch pipe p<1> and the valve o are closed and the valves c, d opened, when the waste gases leaving the regenerators will pass from the channels p, n to the waste gas flue m. When heating by rich gas the branch pipe p' is closed, the flap valve o opened, and the upper valve d lifted by the sleeve h so that air entering at a<4> passes into both channels p, n and to both regenerators; after reversal the conditions are the same as when heating by lean gas. To ensure uniform distribution of the air between the channels p and n the opening a<4> is provided with a deflecting plate q.
Patent GB-319971-A (GB)
Title: Improvements in or relating to vapour burners for heating purposes
IPC: F23D11/44
Filed: 1928-11-01
Abstract: 319,971. Fetter, J. Nov. 1, 1928. Vaporizing-apparatus. - A mick e dipping into a reservoir a supplies petroleum or like fuel to a vaporizing chamber f and the vapour is conducted by a pipe q to a valve-controlled nozzle discharging into the mixing chamber l of a burner arranged below the vaporizing chamber. The flames from the burner issuing at holes m burn in a mantle j, k, such as described in Specification 328,226. The vaporizing chamber f may be formed with a circumferential channel g and be fitted with a partition h. The burner is started by burning spirit in a trough t.