baber/WOPTO huggingface dataset:
Patent GB-572500-A (GB)
Title: Improvements in or relating to magneto-strictive oscillatory apparatus
IPC: H04R15/00
Filed: 1938-11-24
Abstract: 572,500. Magneto-strictive oscillators. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and ROUND, H. J. Nov. 24, 1938, Nos. 34260/38 and 14575/39. [Class 40 (iv)] In a magneto-strictive oscillator particularly for use in echosounding, each magneto-strictive bar MS is polarized by a perrnanent magnet or magnets PM, which as shown in Fig. 1 are arranged outside four L -shaped blocks of soft iron S<1> carrying the usual exciting windings. The air gaps between the blocks S<1> and bar MS are small giving a low reluctance path for the flux ; a parallel path is provided by the arms l<2> of the soft iron blocks. In a modification, bar magnets are arranged between the arms l<1> of the blocks. In a further construction, a U-shaped permanent magnet and a similar shaped soft iron block are placed on opposite sides of the bar. The oscillator may be mounted at the focus of a curved reflector ; the bar may be of nickel and the soft iron blocks laminated. A number of bars MS, Fig. 8, may be mounted with common permanent magnets PM and soft iron blocks S<1> either in a line or as shown in a circle, when they can be used with a truncated conical reflector. Horns H of lead or brass may be attached to the magnets and blocks to give an even wave front for transmission.
Patent GB-1236639-A (GB)
Title: Strip welding device
IPC: B23K9/025
Filed: 1968-07-18
Abstract: 1,236,639. Joining strips; welding by fusion; shearing. MESSER GRIESHEIM G.m.b.H. 18 July, 1968 [19 July, 1967], No. 34362/68. Headings B3A, B3R and B3W. In a strip welding apparatus having a pair of shearing cutters 16 for simultaneously trimming the ends of two strips 27, 28 and a device 50 for welding together the trimmed ends, the shearing cutters 16 are carried on an upper transverse beam 15 of a holder, a lower transverse beam 19 of which acts as a support surface during the welding operation. Prior to trimming, each strip end 27, 28 is clamped between a top clamp jaw 32 having a plastics layer 47 of high coefficient of friction and a bottom clamp jaw 33 and between the top clamp jaw 32 and a stationary support 48. Each bottom clamp jaw 33 is moved relative to the top clamp jaw 32 by piston and cylinder assemblies 40, 43 mounted on top of the jaw 32. The strip ends 27, 28 are trimmed by reciprocating the shearing cutter holder by a piston and cylinder assembly to cause the cutters 16 to co-operate with stationary cutters 31, after which the pairs of clamp jaws 32, 33 are slightly raised by piston and cylinder assemblies (34, 35) (Fig. 1, not shown) and moved towards each other by piston and cylinder assemblies (38, 39) into the welding position where a copper layer 21 on the lower beam 19 acts as a support. The strip ends 27, 28 are welded together by a gas shielded arc or oxy-fuel gas device 50 which is suspended from the shearing cutter holder and moved by a driving pinion engaging a rack attached to the upper side of the upper beam 15. Filler material may be used, a wire reel 18 being provided on top of the beam 15. Disposed side by side over the width of each top clamp jaw 32 are a plurality of jaw parts 53 which are fastened on to the jaw by threaded bolts 55 and nuts 56. An intermediate rubber layer 54 allows relative movement between the jaw parts 53 to compensate for thickness variations within the strip 27, 28. The jaw parts 53 are covered by a copper layer 61. The shearing and clamping devices are arranged at 83 degrees to the path of the strip and the clamp jaws 32, 33 are adjustable substantially transversely by piston and cylinder assemblies (51, 52) for aligning the strip ends.
Patent GB-766292-A (GB)
Title: Improvements in fork-lift trucks
IPC: B66F9/18
Filed: 1954-11-26
Abstract: 766,292. Fork lift trucks. RANSOMES, SIMS & JEFFERIES, Ltd., and RAYMENT, E. W. Nov. 17, 1955 [Nov. 26, 1954], No. 34410/54. Class 78 (3). In a fork lift truck goods are stabilized on the fork 4 by a guard 17. This guard is pivoted at 21 to a back frame 14 which is secured to the fork, and which is capable of lost motion relative to the lifting carriage 2, a chain 23 being connected between the guard and the carriage so that during the initial lifting movement, when the carriage 2 is raised relative to frame 14, the chain is slackened so allowing the guard to fall into a load-engaging position; whilst when the carriage is lowered with the fork resting on the ground, the chain is tensioned so raising the guard free of the load. The frame 14 is attached to a plate 5 which has lugs 8 extending through slots in the carriage and engaging springs 11 which also engage lugs 10 secured to the carriage 2. Plate 5 also carries rollers 13 which run on the back of the carriage. The pivot 21 is adjustable along the guard which carries an adjustable counterweight (not shown) at its rear end.
Patent GB-1100078-A (GB)
Title: Improvements in or relating to adhesives for dentures
IPC: C09J105/04
Filed: 1966-08-02
Abstract: A dental adhesive comprises one or more alkalie metal alginates, in admixture with one or more physiologically harmless alkaline earth metal salts of organic acids.  The alginate may be the sodium salt; the other salt may be the Ca, Sr or Mg salt of ascorbic, tartaric, citric, malic, lactic, or glycerophosphoric acid.  Anhydrous glycerin, gum tragacanth or gum arabic may additionally be present.
Patent GB-997610-A (GB)
Title: A filtering apparatus
IPC: B01D33/00
Filed: 1963-09-02
Abstract: 997,610. Travelling-band and drum filters for liquids. J. SHIMIZU. Sept. 2, 1963 [April 12, 1962], No. 34617/63. Heading B1D. Filtering material is supplied to one (the "inner") side of an endless filter band 8 as it passes in a roughly right-to-left direction through a tank 6 supplied at 16 with suspension. The band 8 is guided, with a further endless filter band 7<SP>1</SP> (the filtering material being located between them) through a bath of liquid to be filtered, 2, by a hollow perforate rotary drum 1. At rollers 11 and 9, band 8 is led off, residue filtered out from bath 2 on to the outside of band 8 being removed at 11, 12. At roller 9<SP>1</SP> and one roller 14<SP>1</SP>, band 7<SP>1</SP> is led off. Filtering material adhering to the contacting surfaces of both bands is removed by rollers 9, 9<SP>1</SP> and doctor 10, and conveyed away at 18 to form suspension again for feeding at 16. In Fig. 1 (not shown), the band 7<SP>1</SP> is secured permanently to the drum 1.
Patent GB-1194146-A (GB)
Title: Alkylamine Salts and their use as Fuel Additives
Inventor: ANDRESS HARRY JOHN
IPC: C10L1/26
Filed: 1968-07-22
Abstract: 1,194,146. Alkylamine salts. MOBIL OIL CORP. 22 July, 1968, No. 34879/68. Heading C2C. [Also in Division C5] Novel alkylamine salts of the general formula wherein R 1 , R 2  and R 3  are H or C 1-22  alkyl groups, at least one of R 1 , R 2  and R 3  being an alkyl group; X is an acid molecule chosen from (a) a phosphoric acid of 2-8 P atoms per molecule, or (b) a phosphoric acid alkyl ester of 2-8 P atoms per molecule and containing 1-4 C 1-22  alkyl groups, n is 1-5, the maximum value of n being limited by the number of replaceable H atoms in the acid of which X is an acid molecule, are prepared in known manner. R 1 , R 2  and R 3  advantageously contain 8-18C atoms and the acid is preferably tripolyphosphoric acid. In the examples, the salts prepared are the Primene 81R salts of tripolyphosphoric acid, Phosphonol H and Strodex P-100 ("Primene " is a Registered Trade Mark).
Patent GB-1392420-A (GB)
Title: Method and device for measuring parameters of resonant lc  circuit elements
IPC: G01R27/26
Filed: 1973-07-23
Abstract: 1392420 Measuring capacitance and inductance PENZENSKY POLITEKHNICHESKY INSTITUT 23 July 1973 34978/73 Heading G1U A method of measuring the capacitance and inductance of either a parallel LC circuit 13, 14, Fig. 1 or a series circuit 35, 36 Fig. 2 (not shown) comprises, for the parallel circuit, (a) applying via a switch 1 a linear decreasing ramp voltage, -Kt, Fig 3(a) to the circuit for a fixed duration To, (b) applying an increasing ramp voltage, +K (t-T 0 ) until the current through the circuit reaches zero,  (c) applying a zero voltage to the circuit for a sufficient time to allow the current through the circuit to be measured, (d) applying a constant voltage, +E 0 , to the circuit and measuring the slope of the falling current amplitude. The measured current and slope correspond to the capacitance and inductance respectively. In the parallel circuit measurement, the current through the circuit is converted to a voltage by a virtual earth amplifier 15 and feedback 16 Fig. 1. The slope of the falling current is determined from the time taken for the amplifier output U2 to reach two reference levels U 3 , U4, Fig. 3(b). The time is measured by pulse counting. For the series connected circuit the reference voltages shown in Fig. 3(a) are replaced by currents and the voltage across the circuit rather than the current through it measured. The amplifier (15) and input resistor (37) now function as a current source for the circuit (35,36).
Patent GB-879837-A (GB)
Title: Improvements relating to electronic counting chains
Inventor: HURST STANLEY LEONARD
IPC: H03K23/00
Filed: 1958-10-31
Abstract: 879,837. Transistor multi-stable circuits. WESTING HOUSE BRAKE & SIGNAL CO. Ltd. Oct. 30, 1959 [Oct. 31, 1958], No. 35033/58. Class 40(6) [Also in Group XIX] In a multistage electronic counting chain, each stage comprises a bistable pair of cross-coupled transistors and feedback means are provided for each stage to ensure that a previously reversed stage is reset to normal. Fig. 1 shows three stages A, B, C of a counting chain, negative stepping pulses being applied alternately to leads S1, S2, the counting stages being connected alternately to the leads S1, S2. Each stage comprises a pair of P-N-P junction transistors, such as TR1A, TR2A, the transistors TR2A being normally conducting. The interstage couplings include a variable impedance shunt path such as PB connected at one end to the input path of one stage and at the other end to the collector of the transistor such as TR2A of the previous stage, stepping pulses being dissipated over the path as long as the transistor TR2A is conducting. The interstage coupling includes also feedback connections FA &c. connected at one end to the collector of the trainsistor such as TR2B of one stage and at the other end to positive potential and to the base of an additional transistor such as TR3A in the preceding stage. Assuming that stage A has been reversed, the next stepping pulse (on the line Sl) is applied to the base of the transistor TR1B, the transistor TR2B becoming non-conducting to cause a capacitor C1A to produce a pulse which switches on the transistor TR3A to reset the stage A. The next stepping pulse (on the line S2) reverses stage C only since the pulse applied to stage A is dissipated over the path PA. In a modification (Fig. 2, not shown), the feedback connections FA &c. are connected back directly to the base of the transistor TR2 in the preceding circuit and the shunt paths PA &c. are replaced by transistor base biasing connections. The circuit can be adapted to employ N-P-N transistors of the supply potentials are suitably modified.
Patent GB-345287-A (GB)
Title: Improvements relating to boiler feed water supply systems
IPC: F22D1/32
Filed: 1929-11-16
Abstract: 345,287. Feed water supply systems for steam boilers. PENNINGTON, R., 7, Sherdley Road, Crumpsall, and MATHER & PLATT, Ltd., Park Works, both in Manchester. Nov. 16, 1929, No. 35112. [Class 123 (ii).] In a closed feed-system comprising a surge tank d between the condenser extraction pump c and the boiler-feed pump g, to prevent excessive rise of pressure in the feed-pipe between the feed-pump and the boiler, the feed regulator e is arranged between the surge tank and the feed-pump. The regulator e, Fig. 1, is controlled directly from the boiler water level and the feed-pipe is unrestricted. The feed may be supplied through the usual regulator r, Fig. 2, the regulator e being then operated by the fluctuations in pressure in the feedpipe. A relief valve s allows water to return to the surge tank d when the pressure in the feed-pipe rises above a certain amount. A tank f is interposed between the surge tank and the feed-pump. The extraction pump and a booster pump h deliver into a series of heaters i from which the heated water flows through a pipe n into the tank d together with the condensate from the heaters. Pumps may be provided between the heaters, and all the pumps may be arranged in line and driven from a common shaft.
Patent GB-841242-A (GB)
Title: Improvements in or relating to steroids and the manufacture thereof
IPC: C07J1/00
Filed: 1956-11-16
Abstract: The invention comprises a 9-halo-17a -methylandrostane-3,11b ,17b -triol having the formula <FORM:0841242/IV(b)/1> wherein R is hydrogen or methyl and X is fluorine, chlorine, bromine or iodine and a process which comprises reducing the 3-keto group to a hydroxy group in a 9a -halo-11b ,17b -dihydroxy - 17a  alkyl - 5a (or 5b ) - androstane-3 - one or a 9a  - halo - 11b ,17b  - dihydroxy-17a  - alkyl - 19 - nor - 5a  (or 5b ) - androstane-3-one with a reducing agent to produce the corresponding 9a  - halo - 17a  - alkyl - 5a (or 5b ) - androstane - 3,11b ,17b  - triol or 9a  - halo-17a  - alkyl - 19 - nor - 5a  (or 5b ) - androstane-3,11b ,17b -triol. Reduction may be effected with sodium borohydride, potassium borohydride, lithium aluminium hydride or other dimetallic hydride, sodium and alcohol, or employing hydrogen and a platinum catalyst in an inert solvent such as ethyl alcohol.  Examples describe the preparation of 9a -fluoro 17a -methyl - 5a (and 5b ) - androstane - 3,11b ,17b  - triol, 9a  - fluoro - 17a  - methyl - 19 - nor - 5a (and 5b ) - androstane - 3,11b ,17b  - triol, the corresponding 9a  - chloro -, 9a  - bromo -, and 9a -iodo-compounds, the corresponding 17a -alkyl compounds wherein the alkyl radical is ethyl, propyl, isopropyl, butyl, sec.-butyl, amyl, hexyl, heptyl and octyl, mono-, di-, and triesters thereof with acetic, formic, propionic, trimethylacetic, furoic, cyclohexylpropionic, benzoic phenylacetic, cyclopentylpropionic, phenylpropionic, methybenzoic, furylacrylic, valeric and methacrylic acids.  Specification 841,241 is referred to.
Patent GB-1311650-A (GB)
Title: Fabric laying machine
IPC: A41H43/00
Filed: 1971-07-27
Abstract: 1311650 Laying fabrics G STUMPF 27 July 1971 [14 June 1971] 35144/71 Heading D1S A fabric laying machine of the type comprising a laying carriage 4 mounted to reciprocate along a laying table 1, a support 8 for a roll 9 of fabric carried by holding means 7 mounted on the carriage 4, two motor-driven fabric-pull-off rollers 14a, 14b and a cutting device 15, is characterized in that the support 8 is adjustable relatively to the carriage 4 in a direction parallel to the direction of reciprocation of the latter. The holding means 7 is mounted so as to be transversely adjustable on cross-struts 30 of the carriage 4 by rollers 31, 33. The fabric roll support comprises a pair of parallel rods 8 each having a portion of its length telescopically guided in a rectangular-section guide 35 and formed as a rack 39 to engage a pinion 40 drivable by a geared motor 41 located in the holding means 7. The free ends of the rods 8 are provided with pillows 37 to receive the shaft 38 carrying the roll 9. The motors 41 are controlled by a photocell 10 and a light source 12 which scans the edge of the fabric 11 and pulses are emitted when there is a change in the distance between the photocell and the vertically hanging fabric 11. As the radius of the roll 9 becomes smaller, the motors 41 rotate the pinions 40 slowly to advance the rods 8 to ensure that the fabric 11 always extends in a constant vertical plane. The photocell 10 and the light source 12 are mounted on a rod 42 which, for different fabric widths, is adjustable in a bush 43. Alternatively, the maintainance of the fabric 11 vertical may be effected by a handwheel (not shown). Each end of the shaft of the roller 14b is independently adjustable to effect inclined positioning thereof relative to the roller 14a by one of a pair of eccentric levers 22 which are manually operated and mounted on opposite sides of the carriage 4, the levers 22 being connected to rods 48 carrying bearings 47 for the shaft ends of the roller 14b. If a longitudinally folded fabric is being laid the roller 14b is adjusted so as to prevent an undesirable ironing effect on the fold (13), Figs. 3b and 3c (both not shown). The rollers 14a, 14b are driven through chains and sprockets (not shown) synchronously with the drive of the carriage 4 and may be covered with a foamed plastics material 46 to prevent fabric slippage. The device 15 comprises a rotary cutter 18 which is mounted so that, in use, its cutting edge travels along a longitudinal slot 19a in a cutter guard 19 having a deflector plate 20 mounted thereon to prevent wrinkling of the fabric. The device 15 is vertically adjustable by a handwheel 17. As the fabric is initially unwound from the roll 19 it interrupts a light beam of a photosensitive device 21 located on the device 15 and after a predetermined over-run the cutter 18 is operated to perform a trial cut. A slipping clutch 24 comes into operation when the carriage 4 is started to give constant acceleration from the state of rest up to maximum laying speed.
Patent GB-440849-A (GB)
Title: Improvements in or relating to devices for controlling monogrammic and like signs comprising a plurality of luminous discharge tubes
IPC: G09G3/00
Filed: 1934-12-07
Abstract: 440,849. Stencil switches. FUNK, E., 10, Ziegelofengasse, Vienna. Dec. 7, 1934, No. 35201. [Class 38 (v)] [See also Groups XXXVIII and XXXIX] All the terminals of the lamps required to form a selected letter in a universal letter type monogrammic sign consisting of luminous discharge tubes are selected by a rotatable disc, which in each position selects the terminals for three letters, and by one of three relays which selects and connects to a high tension supply the particular group of terminals to be energized. The disc is rotated by hand or by a motor in a remote control system controlled by individual plungers having a common resetting means and selected by hand or by a stencil plate. When a plunger 10, Fig. 5, is depressed it completes circuits between terminals 11 and 12 and KL and S, Fig. 6. The plunger may be depressed by hand or may be operated by moving the handle 1, Fig. 5, in the direction of the arrow which depresses the stencil plate 9, by means of linkage 3, 4, 5, 6, 7, 8. The plunger is reset by plate 16 when the handle 1 is moved in a clockwise direction, this resetting being prevented by magnet S4 whilst selection is in progress. The motor 1, Figs. 2 and 6, rotates the disc 24, the locking magnet 51 being energized; and in each position one ,of the cams or stops 28 opens one of the contacts U. When the contact U in the selected circuit is opened the motor stops and magnet S1 releases to lock the disc 24. One of the relays R1-R3 has also been energized by the depressed plunger so that a circuit is completed through Stk1, Stk2 or Stk3 and the cross connections in the disc 24, to the terminals of the tubes on the display panel. Magnets S2 and S3, which were energized in series with the motor M release and connect the high tension supply to the selected tubes to complete the display. A lamp L corresponding to the sign displayed, which may be in the head of the plunger, as shown in Fig. 7, is illuminated.
Patent GB-165064-A (GB)
Title: Improvements in or relating to exchangeable artificial teeth
IPC: A61C13/00
Filed: 1920-12-15
Abstract: 165,064. Ramsperger, J. June 16, 1920, [Convention date]. Teeth, artificial.-An interchangeable tooth 1 is formed with a single pin 2 having a rectangular head 3 adapted to be passed through an aperture 5 in a locking-plate 4, which may be secured to a plate or to a bridge. The tooth is slid longitudinally on the plate 4 so that the neck 2 of the pin passes through a slot 6 communicating with the aperture 5. The head 3 of the pin prevents withdrawal. A cap 7 is secured to the back of the plate 4 to form a cavity to receive the head of the pin and the cement whereby it is secured. When used with a bridge this is formed with a recess to receive the prejecting cap 7.
Patent GB-608254-A (GB)
Title: Improvements relating to guides for radio-electric waves associated with elements for regulating the propagation of said waves
IPC: H01P1/207
Filed: 1945-12-31
Abstract: 608,254. Electric resonators. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Dec. 31, 1945, No. 35330. Convention date, Nov. 14, 1944. [Class 40 (viii)] A resonant filter for a wave-guide is constituted by a conductive diaphragm disposed within the guide with its general plane perpendicular to the longitudinal axis and provided with a slot having at least two limbs, the slots being dimensioned so as to be in resonance with the frequency of the wave traversing the guide, one of the limbs being disposed perpendicularly to the electrical lines of force of the waves, and one or more limbs being disposed parallel to the lines of force. In Fig. 5, the slot is U-shaped, being the space between a transverse diaphragm 4 and an adjustable plate 3. The side limbs 2, 2<1> are inductive and the base 1 is capacitive. Thus, adjustment of plate 3 alters the capacitive limit and hence the resonant frequency. If no adjustment is required, a U-shaped slot in a diaphragm may be used. Alternatively, a slot arranged at an angle to the lines of electric field, Fig. 3, acts as if it had one limb parallel to the field and one limb at right angles. Thus, rotating the slot relative to the field varies the relative lengths of the virtual limbs and so varies the resonant frequency.
Patent GB-490495-A (GB)
Title: Improvements in or relating to vacuum cleaners
IPC: A47L5/32
Filed: 1937-12-21
Abstract: 490,495. Vacuum cleaners. AIR-WAY ELECTRIC APPLIANCE CORPORATION. Dec. 21, 1937, No. 35348. Convention date, Jan. 11. [Class 8 (i)] The handle 43 of a vacuum cleaner is rigidly attached to the fan case 29<1>, and the fan case is telescopically connected with the outlet or outlets 14<1> of the suction chamber and mounted rotatably by arms pivoting about the horizontal axis of the motor 15. The motor is supported by projections 28 on the suction chamber and resilient mountings 29, and drives the fan and the agitator 16 through belts. A cover 21 is pivoted about the motor axis and releasably attached by buttons 41 to the necks of the fan casing. A visor 23 is provided having a reflecting hood for a lamp 26. A rubber packing is provided between the fan case and the outlet 14<1> and a spring- pressed lever 48 tends to lift the fan case. When the handle is raised vertically, the fan case is detached from the suction chamber allowing tools to be connected to the fan case. In a modification, the visor and motor cover are combined to form a cover pivoted on the suction casing and resting on a buffer on the fan case, the cover and fan case being connected by a spring.