baber/WOPTO huggingface dataset:
Patent GB-1465270-A (GB)
Title: Dynamic convergence circuit
IPC: H04N9/28
Filed: 1973-06-12
Abstract: 1465270 Cathode-ray tube circuits RCA CORPORATION 10 June 1974 [12 June 1973] 27791/73 Heading H4T To correct misconvergence of the blue beam 13(B), Fig. 1, of a colour television display the horizontal parabolic convergence current flowing in the blue convergence coil 42 (Fig. 2) is amplitude modulated at the vertical frequency by the shunting effect of a transistor 46 which is driven into conduction during approximately the first third of the vertical deflection period by means of a vertical frequency sawtooth wave 23. The horizontal convergence current is derived from a negatively going fly-back pulse 36 which, after amplitude adjustment by variable inductance 38, is integrated in the parallel circuit comprising inductance 39, capacitor 40 and resistor 41 and supplied to the convergence coil 42 which, together with capacitor 43 and resistor 44 forms a circuit resonant at the horizontal rate and effects a further integration to produce a parabolic waveform such as shown at 61, 62, Fig. 3b. Diode 50 is forward biased by the positive peaks of the latter waveforms and when, during the negative portion of sawtooth 23, transistor 46 conducts it provides a variable shunt loading of the parabolic convergence coil and thus produces the required vertical frequency amplitude modulation of the convergence current. The time for which transistor 46 conducts is determined by the base voltage and this, by selection of the value of resistor 47, is arranged to cause transistor to conduct during the scanning of the top third of the screen (see Fig. 3a). The depth of such modulation is adjusted (e.g. between 5% and 40%) by means of resistor 45 and resistor 49 which limits the maximum current limits the maximum modulation depth and therefore protects the transistor from damage. If a positively going sawtooth 23 is not available a negatively going sawtooth may be employed by applying it to the base of transistor 46 and returning potentiometer 45 to ground instead of to terminal 24. The waveform 23 may have shapes other than sawtooth. The Red and Green convergence circuits are conventional.
Patent GB-1391684-A (GB)
Title: Field control in electrostatic imaging systems
IPC: G03G15/054
Filed: 1972-06-14
Abstract: 1391684 Electro-photographic exposure; automatic control systems DIAGNOSTIC INSTRUMENTS Inc 14 June 1972 [30 June 1971] 27818/72 Headings G2H and G3R [Also in Division H1] In a method of forming on an insulating surface 17, Fig.1, a charge image corresponding to an object 11 irradiated by X-rays or gamma rays to cause photo-emission from a surface 21, the photoemission being amplified by Townsend discharge in a gas between the electrodes, charges deposited on the surfaces 17 tend to reduce the electric field and thereby reduce the amplification caused by the gas; this is avoided by varying the voltage across the electrodes. In one arrangement the potential across the electrodes is increased manually or automatically as a function of time, and in another method Fig.4 (not shown) the potential is increased as an inverse function of the current between the electrodes (as sensed by the voltage across a series resistance) to maintain the current substantially constant. The current may be integrated and the exposure terminated when the integrated current reaches a predetermined value. The image is preferably formed by electrons and negative ions, but the polarities of the electrodes may be reversed to form the image with positive ions. The cathode 19 may be of aluminium, and its emissive surface 21 should be of X-ray absorbing material such as lead. The anode 13 should be of aluminium or beryllium and the insulating material 17 may be of paper or of resinous material. The latent image on the material 17 may be scanned by an electron beam to produce a video signal which is displayed on a cathode ray tube, or may be made visible, for example by the use of toner particles.
Patent GB-362546-A (GB)
Title: Improvements relating to the displaying of still and moving pictures
IPC: G03B15/08
Filed: 1930-09-18
Abstract: 362,546. Optical - projection apparatus. ARMSTRONG, E. W., 16, Woodcot Avenue, Belfast, MEARES, J., 10, Princess Avenue, Bangor, Co. Down, and FORREST, T. A., 2, Sandy Row, Belfast, both in Ireland. Sept. 18, 1930, No. 27828. [Class 97 (i).] Apparatus for displaying still pictures or other transparencies comprises in combination a projector having an electric projection lamp, a projection screen, picture-carrying means intermittently moved to bring the pictures into projection position at and for timed intervals, automatically operated mechanism for effecting relative movement between members of the system projector, screen and pictures in synchronism with the projection, and means for interrupting the projection lamp circuit in synchronism with the movements of the picture-carrier. As shown in Fig. 2, the apparatus comprises a picture-carrying disc 1, provided with spring clips for the pictures, which is rotated by a ratchet 2 and pawl 3, the latter being reciprocated by an eccentric 4 driven from a motor 6 through the worm gearing 7. A chain sprocket 9 drives by means of the chain 11 the sprocket 10, which is connected through skew gears 13 to a crank 12 oscillating a screen 14 by a rod 15. Between the projecting lamp 19 and the lens 16 is a watercooled filter 16a. The rotary switch 8, Fig. 6, driven from the gearing 7, comprises an insulating cam 18 pressing a spring contact 18a against the contact 18b to switch in the projecting lamp 19, and also a cam 20 operating the contacts 20a, 20b and 21a, 21b to control the lights, which may be coloured, in the chambers 22. The screen 14 may be given a parallel reciprocation by the use of two cranks and two connecting-rods and the provision of slide-ways to support the edges of the screen. In a modification, Fig. 8, the screen 14 is fixed and a movable mirror 23 is provided. A rotating multicoloured disc may be provided in front of the lens 16. The intermittent motion may also be obtained by the use of maltese cross, cam and ratchet, or other gearing. The pictures may be supported in chain-formation, or a length of film may be employed. Single pictures may be held in a lantern slide carrier. A plain glass plate may be provided in front of the screen, and the screen may be flexible.
Patent GB-603522-A (GB)
Title: Improvements in or relating to cooking utensils
IPC: A47J36/02
Filed: 1945-10-23
Abstract: 603,522. Making compound hollow-ware. EKCO PRODUCTS CO. Oct. 23, 1945, Nos. 27881. Convention date, Nov. 4, 1944. [Classes 83 (ii) and 83 (iv)] In making stainless steel &c. cooking vessels with copper-clad bottom, the copper and the steel are united to form a blank which is subsequently shaped. A disc 10 of stainless steel and smaller disc 11 of copper are cleaned in a bath of trichlorethylene and placed with a thin sheet of silver solder and united by heat and pressure in a reducing atmosphere. The composite blank is then cupped in a press 13, 14, 15.
Patent GB-324650-A (GB)
Title: Improvements in the production of pattern effects upon textile fabrics or other materials made of or containing cellulose esters or ethers
IPC: D06P5/12
Filed: 1928-09-29
Abstract: 324,650. British Celanese, Ltd., Ellis, G. H., and Miller, W. B. Sept. 29, 1928. Acidylaminoanthraquinones.-Aliphatic acidylamino derivatives of anthraquinone or of hydroxy-, alkoxy-, or halogen-substituted anthraquinones such as the 1-acetylamino, 1-(or 2-) propionylamino, 1 - acetylamino - 2 - methyl, 1- acetylamino-4-oxy, 1-propionylamino-4-methoxy, 1 : 4 - di (propionylamino), 1 - methylamino-4- acetylamino, 1 : 4-di (acetylethylamino), 1 : 5-di- (acetylamino) - 4 : 8 - dioxy, 1 - propionylmethylamino-4: 5-dioxy, and 1 : 4-di (acetylmethylamino)-5 : 6-dioxy derivatives of anthraquinone are obtained by treatment of the corresponding aminoanthraquinones or derivatives thereof with acetic or propionic anhydride in acetic acid solution.
Patent GB-402224-A (GB)
Title: Improvements in and relating to electric motors
IPC: H02K17/10
Filed: 1932-10-07
Abstract: 402,224. Induction motors. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Wolfe, R. R. ; 2145, C Street, N.W., Washington, U.S.A.). Oct. 7, 1932, No. 27988. Convention date, Oct. 9, 1931. [Class 35.] All the primary windings of a reversible induction motor are energized for one direction of rotation or the other by energizing for operation in one direction the parts of the winding which serve as short-circuited coils for rotation the other direction. In the form shown, with one position of switch 8 the coils 3 are in series with the main winding 2, coils 4 being short-circuited whilst in the other position, coils 3 are short circuited, coils 4 being in series with the main winding. The short circuited coils serve as shading coils, and the coils 3, 4 are wound on auxiliary poles 23, the coils on the same pole being wound in opposite directions. The main coils 2 may be placed on all main poles 22 or only on alternate main poles whilst the individual coils of a set may be in series or parallel.
Patent GB-1124725-A (GB)
Title: Improvements in or relating to surgical and obstetrical tables or beds
IPC: A61G7/018
Filed: 1966-06-22
Abstract: 1,124,725. Operating tables. G. C. STEEL. 27 April, 1967 [22 June, 1966], No. 28006/66. Headings A4H and A4J. [Also in Division F2] A hydraulic system for pivoting an obstetrical or surgical platform (50) about a transverse axis (54) includes a release valve 56 for releasing the hydraulic pressure acting on a ram 11 and a locking valve 18 disposed between a pump and the ram 11 and adapted to block the flow of hydraulic fluid in both directions. The release valve 56 is operated by a pedal 13 on the end of a pivoted lever 30 adapted to move longitudinally a spring returned element (32) (Fig. 4) adapted to depress a plunger (33) and open the valve. The element (32) is normally spaced from the plunger and the anti-clockwise and clockwise movements of the lever 30 from a medial position are determined by adjustable stops (43, 44) and cause the release valve to open by different amounts. The locking valve 18 is a needle valve and is operated by rotating a lever 26, and a ball detent (27, Fig. 3) locates the lever when the valve is closed. The platform (50) and support frame 53 are as described in Specification 936,579.
Patent GB-955090-A (GB)
Title: Improvements in reinforced plastics
IPC: C08G8/00
Filed: 1960-08-12
Abstract: A plastic composition comprises 100 parts by weight of a thermosetting resin, with not less than 150 parts of calcium carbonate or glass or porcelain powder of particle size less than 150 mesh and not less than 500 parts of iron sand with particles which will pass a 50 mesh sieve and be retained by a 100 mesh sieve.  The composition may also include not less than 200 parts of river sand. Small pebbles may also be added.  Suitable thermosetting resins are unsaturated polyesters, epoxy rubber-styrene or phenol-formaldehyde. Examples 1-5 use a styrene-unsaturated polyester resin (the polyester being prepared from ethylene glycol, maleic anhydride and phthalic anhydride) with methyl ethyl ketone peroxide as catalyst, dimethyl phthalate as plasticiser and cobalt naphthenate as accelerator.  The fillers were calcium carbonate and iron sand, with pebbles in addition in Example 4, and pebbles and river sand in Example 5. In Example 6 the resin was an epoxy one from bisphenol A and epichlorhydrin with triethylene tetramine as hardener and calcium carbonate and iron sand as fillers.  The compositions are useful for structural and ornamental purposes.
Patent GB-1410554-A (GB)
Title: Thioadenosines
IPC: C07H19/16
Filed: 1973-06-13
Abstract: 1410554 Thioadenosines KOHJIN CO Ltd 13 June 1973 [16 June 1972 (2) 19 June 1972 26 Dec 1972 (2) 29 Jan 1973 12 March 1973 23 March 1973] 28230/73 Headings C2C and C2P Novel compounds (I) and (II) (including salts thereof and the hydroxy protected compounds corresponding to II) where R is alkyl of 5 or more C, cycloalkyl of 5 or more C, cycloalkylalkyl of 5 or more C, optionally substituted-allyl or -benzyl or-dialkylaminoalkyl, are made by alkylating a 2-thioadenosine and, if desired, phosphorylating (I) so obtained. Pharmaceutical preparations acting as coronary vascular vasodilator and blood platelet aggregation inhibitor contain (I) and (II) as active ingredient.
Patent GB-1465349-A (GB)
Title: Counter drive mechanism for use in a digital clock
IPC: G04B19/21
Filed: 1974-06-26
Abstract: 1465349 Digital clocks JECO KK 26 June 1974 [26 June 1973(3) 30 March 1974] 28352/74 Heading G3T [Also in Division G4] The specification describes several mechanisms for driving the counter of a digital clock each comprising a pair of rotary members on a common shaft with a torsion spring fixed between them one of the members being held against rotation until the other is turned by the input through a particular angle when the first is released for rapid movement under the action of the spring to bring stops 79, 80 on the two members into engagement. In Figs. 5, 7, shaft 20 with an attached cam member 18 is continuously rotated by a clock motor 44. Member 18 has four cam surfaces 35 which displace a two armed lever 19 which latches a four armed detent member 16 loose on the shaft 20 until lever 19 is displaced by the cam. A spring 24 between an anchor 22 on the shaft and the detent member 16 then drives the latter to step the lowest order number wheel 11 through a Geneva mechanism Fig. 6 (not shown). The cam member 18 carries a gear 61 which drives an indicator wheel 51 when the clock is operating. A knob 56 provides for pre-setting by rotating the wheel 11 on for starting the clock mechanism by a cam 58. In another embodiment Figs. 1-4 (not shown) the detent member 16 simply has gear teeth which directly drive the number wheel 11. In Fig. 12 a three lobed cam member 18 releases the latching lever 19 which acts on the teeth of the Geneva pinion 85.
Patent GB-337905-A (GB)
Title: Improvements in or relating to starting means for internal combustion engines
IPC: F02N1/02
Filed: 1929-09-20
Abstract: 337,905. Hepworth, N. J. Sept. 20, 1929. Turning-gear.-In a device for disengaging the shaft 1 of a starting-handle or of a poweroperated starter from the engine shaft 1<x> if the latter turns backwards, an internally threaded sleeve 5 engages a quick thread 7 on the shaft 1. If the, engine shaft turns backwards, the sleeve 5 is locked to a housing 4, integral with or fixed to a bearing bracket 3 of the shaft 1, by a roller ratchet mechanism 9 or by a toothed ratchet and plunger. The Provisional Specification states also that the thread 7 may operate as a ratchet engaged directly by the plunger.
Patent GB-619073-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04M9/08
Filed: 1946-09-24
Abstract: 619,073. Direct-call systems; anti-side-tone circuits. AUTOMATIC ELECTRIC LABORATORIES, Inc. Sept. 24, 1946, No. 28521. Convention date, Sept. 24, 1945. (Class 40 (iv)] In order to prevent feed-back between the receiver and transmitter of a substation, a two-station intercommunication system is provided with automatic means which alternately render effective the transmitter at one station simultaneously with the receiver at the other station, and the receiver at the first station simultaneously with the transmitter at the other. As shown, two thermionic tubes 4, 6 are connected in series with the transmitter 3 and receiver 5 respectively of a substation A. The control electrodes of these tubes are connected to opposite ends of the secondary of a transformer 9, to the primary of which the output of a low-frequency oscillator 23 is connected. The bias voltages thus applied to the tubes 4, 6 with a phase difference of 180 degrees cause their anode impedances to alternately increase and decrease about the mean value, thus rendering the transmitter 3 and receiver 5 alternately effective. A portion of the output of the oscillator 23 is transmitted over the line 1 through low-pass filters 11, 21 to the primary winding of transformer 19 at substation B where it is applied in a similar manner to the control electrodes of two further tubes to render alternately effective the transmitter and receiver of that substation. The connections are arranged so that the transmitter of substation A is disabled simultaneously with the receiver at substation B. The control oscillation used is of a frequency below the voice frequency range. If desired, a frequency above the voice frequency range may be used, an additional line being provided between the stations to carry the control voltage..
Patent GB-932952-A (GB)
Title: A conveying container mounted for movement along inclined rails
IPC: B28C7/04
Filed: 1959-08-20
Abstract: 932,952. Skip hoists; counterbalancing. ARBAU BAUGERATE-G.m.b.H. Aug. 20, 1959 [Aug. 20, 1958], No. 28539/59. Classes 78 (2), 78 (3) and 78 (4). A skip 1 which runs down inclined rails 3 into engagement with stops 5, when it is loaded, and is returned into engagement with stops 4 by a counterweight 10 after it has been unloaded can be held against movement by a brake 11 acting on the shaft 8 of a pulley 9 over which the counterweight rope 7 passes. The skip may be suspended from a frame carrying the rollers 2 through the operating levers (not shown) of a weighing device 15.
Patent GB-894666-A (GB)
Title: A slip ring and brush assembly for a dynamo-electric machine
IPC: H02K13/00
Filed: 1960-08-17
Abstract: 894,666. Slip-rings and bushes for dynamoelectric machines. BENDIX CORPORATION. Aug. 17, 1960 [Sept. 28, 1959], No. 28543/60. Class 35. A slip-ring and bush assembly for a dynamoelectric machine having a carbon brush 25 sliding on a positive slip-ring 11 of copper and a brush 26 of high copper content (80-90%) sliding on a negative slip-ring of carbon, carries current between source 9 and excitation windings 6 on rotor 2. Copper rings 11, 14 separated by an insulating spacer 12 are pressed on an insulating cylinder 19 carried by a metallic cylinder 20 located by shoulder 21 on rotor shaft 10. Carbon ring 13 is held on copper ring 14 with inclined mating surfaces by nut 24 and spring washer 23, thereby allowing for relative thermal expansion and replacement. In such a machine current flow is always from carbon to copper.
Patent GB-243706-A (GB)
Title: Improvements in radiating antenna systems
IPC: H01Q21/06
Filed: 1925-11-13
Abstract: 243,706. British Thomson-Houston Co., Ltd., (Assignees of Rice, C. W.). Nov. 25, 1924, [Convention date]. Aerials; directive signalling; coupling oscillating and radiating circuits.-A directive radiating antenna system comprises a plurality of vertical conductors 1<1> in line at right angles to the direction of radiation, each containing a tuning inductance 6<1>, and a transmission line for supplying substantially in phase currents to all the tuning inductances. The transmission line is provided with series capacities 12 to neutralize the series inductance and the shunt inductances 6<1> are arranged to neutralize the shunt capacity so that the apparent velocity of wave transmission in the line is substantially infinite. The antenna mav form a closed loop, Fig. 1, with condensers 2 and inductances 3 so that the radiation is from the vertical connections 1<1>. The system is fed by a line 7 which is rendered substantially reflectionless by arranging that the impedance of the portion of the inductance 3 or 6<1> in the line is substantially equal to the surge impedance of the line. Additional inductance may be inserted in the verticals to tune them if the shunt inductance 6' is insufficient. A number of loops or rows of verticals may be arranged in parallel spaced by an odd multiple of a quarter wavelength so as to obtain radiation in one direction only. Energy may be fed to only one system the others being energized by re-radiation or a separate transmission line for each system may be provided so arranged that a 90‹ phase difference is provided between the systems. When the separation between the systems is equal to one quarter wavelength the height of each vertical is preferably made equal to half a wavelength so that the electromagnetic and electrostatic couplings between the systems balance each other. The vertical conductors are arranged not less than one quarter wavelength apart and the length of the row preferably exceeds one wavelength.
Patent GB-631512-A (GB)
Title: Improvements in tables and like articles of furniture
IPC: F16B12/46
Filed: 1947-10-27
Abstract: 631,512. Furniture joints. WELLS, E. G., and HOKANSON, A. E. Oct. 27, 1947, No. 28634. [Class 52 ii)] A detachable table leg is connected to the rails 11, 12 by a joint of the kind having a fixing plate at 45 degrees to the rails, the plate 14 having two or more apertures to receive vertically spaced screws 20 in the leg.
Patent GB-666115-A (GB)
Title: Improvement in bottle supporting and closure device for liquid dispensing apparatus
IPC: B67D3/00
Filed: 1949-11-08
Abstract: 666,115. Tapping bottles. AUTOBAR CORPORATION, Nov. 8, 1949. [Nov. 12, 1948]. No. 28665/49. Class 21. [Also in Groups XVIII] A closure device for temporary attachment to a bottle has a bayonet joint connection with a fixed dispensing unit. The device 34, 35 is attached to a bottle by the forcing outwardly of spring fingers 42 by a cone 50, the cone 50 having a diametral pin 56 engageable by a hook through the delivery duct 36. The duct 36 is closed by a slide 62, locked in closed position by tumblers 90 and released by the engagement of a tubular key 113 on the dispensing unit. with the tumblers. The securing of the device on the unit releases the slide permitting an orifice 64 in it to be aligned with the duct 36. The key 113 is so shaped that the device cannot be turned to disengage it from the unit until the slide is closed. Removal of the device from the unit relocks the slide which may be released by a separate tubular key. The bayonet joint comprises lugs 106, 102 on the unit and device respectively. The unit may comprise valves operated by a handle 28 permitting flow of liquid to a measure 24. A counter 30 may record the measures dispensed.