baber/WOPTO huggingface dataset:
Patent GB-587464-A (GB)
Title: Improvements in electric pulsing circuits
IPC: H03K5/07
Filed: 1944-07-25
Abstract: 587,464. Pulse generating circuits; radiolocation. WESTERN ELECTRIC Co., Inc. July 25, 1944, No. 14231. Convention date, May 13, 1943. [Class 40 (v)] In a pulse generator, a tuned circuit is set in oscillation in response to a short initiating . pulse, a rectifier preventing reverse charging of the condenser in the tuned circuit by energy stored in the inductance, and the potential set up across the inductance being utilized to produce a rectangular pulse. As shown, a variable long pulse is produced by a short initiating pulse, and may be used for blanking purposes. At the end of the long pulse, a short delayed pulse is produced similar to the initiating pulse. The delayed pulse may be used to simulate an echo of a transmitted pulse as represented by the initiating pulse. Alternatively, the delayed pulse may be used to initiate a time base circuit a desired time after the transmitted pulse. The blanking pulse may be added to the video signals in a radar set to blank out signals between the transmitted pulse and a predetermined point. Blanking pulse. A short negative impulse applied to the grid of valve V1 is amplified and applied as a positive pulse to the grid of valve V2 biassed beyond cut-off, in the anode circuit of which is a tuned circuit T1. The sudden increase of anode current causes the tuned circuit to oscillate, the upper terminal going rapidly negative and then more slowly positive at the natural frequency of the tuned circuit. The negative part of the waveform is applied to the grid of valve V4, but the subsequent positive half-cycle is suppressed by diode V3. The negative signal on the grid of valve V4 produces a positive pulse at the anode which is applied to valve V5 biassed beyond cut-off, a negative pulse being produced in the anode circuit which may be used as a blanking pulse. Delayed pulse. The positive pulse from valve V4 is applied to the grid of valve V6 biassed beyond cut-off, the sudden increase and decrease of the anode current causing the tuned circuit T2 to oscillate. The oscillation generated at the beginning of the pulse is rapidly damped out by diode V7 since the first crest is of negative amplitude, the oscillation produced at the end of the pulse being damped out after the first positive crest. This waveform is applied to the grid of valve V8 biassed beyond cut-off to produce a short negative pulse in the anode circuit which is applied to the grid of valve V9. The positive pulse from the anode of valve V9 is applied to the grid of valve V10 biassed beyond cut-off to produce a negative pulse in the anode circuit. With the switch 170 in the position shown, the undelayed pulse is taken from the grid of valve V2 and mixed with the delayed pulse in valve V9 so that both the delayed and undolayed pulse appear in the anode of valve V 10. The adjustment of the tuned circuit T1 varies the time delay between the pulses and adjustment' of tuned circuit T2 varies the width of the delayed pulse.
Patent GB-991299-A (GB)
Title: Preparation of chloro-substituted benzene derivatives
Inventor: KOBAYASHI KANJIRO
IPC: C07C17/00
Filed: 1962-04-13
Abstract: Compounds of the general formula <FORM:0991299/C2/1> wherein X is hydrogen or chlorine; Y is a group -CCl3, -COOH, or -COCl; Z is hydrogen or a group -CCl3, -COOH, or -COCl, and is in m- or p-position with respect to Y, are obtained by reacting at 60-90 DEG C. a compound of the formula <FORM:0991299/C2/2> wherein X is hydrogen or chlorine and R is a hydrogen atom or a methyl group in m or p-position with respect to the methyl group, with chlorine in an inert medium under irradiation with U-V radiation or/and in presence of a free-radical generator type of catalyst to produce a compound of Formula I in which Y is a -CCl3 group and Z is H or -CCl3, and, if desired, subjecting the liquid obtained to hydrolysis to produce a compound of Formula I in which Y is a -COOH or -COCl group and Z is H or -COOH, or -COCl.  The product formed by the chlorination process may be isolated by distillation.  Partial hydrolysis to the acid chloride stage may be effected by adding water in an amount equivalent to the theoretical amount required together with a dehydrochlorinating catalyst such as FeCl3 or ZnCl2. For the production of compounds in which Y of the general formula is -COOH, hydrolysis is effected under acidic or alkaline conditions.  If desired, the resulting solution from the chlorination reaction may be subjected to alcoholysis so as to obtain a corresponding ester. Compounds specified as starting materials are-o- and p-toluene sulphochloride, 3-chloro-4-methylbenzene sulphochloride, m- and p-xylene sulphochloride.  Inert media specified are chloroform, carbon tetrachloride dichlorobenzene, tri-chloro-benzene, and chlorine substituted trichloromethyl or bis-trichloromethyl benzenes. Free radical generator type catalyst specified are azo-bis-isobutyronitrile; azo-bis-valeronitrile; lauroyl-, benzoyl-, 4-chlorobenzoyl-, and 2,4-dichlorobenzoyl peroxides. Examples describe the preparation of o- and p-chlorobenzotrichloride, 2,4-dichlorobenzotrichloride, 4 - chloro - 1,3 - bis - trichloromethyl - benzene, 2 - chloro - 1,4 - bis - trichloromethyl - benzene, p - chlorobenzoic acid, p - chlorobenzoyl chloride, 4 - chloro - isophthalic acid, and 2-chloro-terephthalic acid.
Patent GB-1069477-A (GB)
Title: Process for making radiators, and radiators so made
IPC: B21D53/02
Filed: 1965-04-05
Abstract: 1,069,477. Making radiators; brazing. L'ALUMINIUM FRANCAIS, and COMPAGNIE GENERALE DU DURALUMIN ET DU CUIVRE. April 5, 1965 [April 8, 1964; Feb. 26, 1965], No. 14361/65. Headings B3A and B3R. A radiator comprises a number of hollow elements, each formed by a pair of roll bonded sheets, the elements being sealed at 17, brazed together such that the chambers 11 and 12 of adjacent elements are in contact, and then being formed with passages 8 and 9 (Fig. 2, not shown), through the chambers. Inserts 18 may be interposed between adjacent elements. Each element is formed by roll bonding two sheets, one of which has been coated with stop weld material, and then inflating the sheets between opposed flat plates to form the chambers 11 and 12, and ducts 13 and 15, using an inflating channel 17. The elements may be coated with flux and heated in a furnace, or dipped into a heated flux bath. The passages 8 and 9 are formed by a boring bit having an air suction conduit, or by a laser beam. After sealing, a small aperture, temporary nozzle, or porous insert may be formed in the elements, in order to allow air or the inflation fluid to escape when heated during the brazing, The elements are formed by Cu, Zn, Al, Mg. Fe, or their alloys.
Patent GB-143729-A (GB)
Title: Improvements in or relating to couplings for rods or tubes, particularly for use in operating railway switch points and the like
IPC: B61L7/02
Filed: 1919-06-06
Abstract: 143,729. Glenn, S. L. June 6, 1919. Rod couplings.-A coupling for connecting the " rodding " used for operating railway switch points and the like consists of a sleeve of standard pipe 3, Fig. 1, of larger bore than the pipes 1, 2 to be connected. The part 3 is of a diameter large enough to be an easy fit on the main portion of the pipe 2, the other part 3<a> being swaged down to make a good fit on the end of the pipe 1, to which it is secured by rivets 4 arranged to lie in different longitudinal planes of the pipe. In a modification, the portion 3<a> is welded to the pipe 1. According to alternative constructions, the sleeve 3 is of the same bore throughout, and is secured to the pipe 1 by a single flat rivet 6, Fig. 5, or by a cotter 7, Fig. 6, driven through slots in the pipes 1, 3 and having its lower end 7<a> twisted through 90 degrees. The connexion of the socket portion of the pipe 3 to the adjacent length of " rodding " is in every case made in the usual way by means of a cotter 5.
Patent GB-855346-A (GB)
Title: Improvements in or relating to pleat-forming and pleat-holding devices for curtains and the like
Inventor: VERNON KENNETH JAMES
IPC: A47H13/14
Filed: 1956-05-10
Abstract: 855,346. Curtain suspensions. FRENCH & SONS Ltd., T. May 10, 1957 [May 10, 1956], No. 14525/56. Class 52(5) Bendable strip material for pleat forming and holding devices has flat-section fingers b for taking into pockets formed, e.g. in the curtain heading tape and pressed up parts c and notches d for receiving clip-on hooks e for mounting on the ring of a curtain runner or on a pelmet rail. Alternatively, hooks may be formed by striking up parts of the strip material. In use, the pelmet or curtain fabric is mounted on the prongs with the fabric and strip material flat and then the strip is bent about notches g to the desired shape. Alternatively, the pleats may be formed by inserting prongs b in spaced pockets of the heading tape, the strip material remaining flat. For groups of pleats, short lengths of strip material are cut off and used as described above.
Patent GB-1146019-A (GB)
Title: Electrophotographic imaging process
IPC: G03G17/04
Filed: 1966-04-01
Abstract: 1,146,019. Electro-phoretic and frostimaging. RANK XEROX Ltd. April 1, 1966 [April 2, 1965], No.14609/66. Heading G2H. [Also in Division H1] An electro-phoretic imaging system for single or multi-colour images comprises photo-sensitive pigment particles of formula:- where R 1 , R 2 , and R 3  are aryl, substituted aryl, alkaryl or substituted alkaryl. In the specific embodiments R 1  may be pyrenyl, naphthyl, perylenyl, 2 cyanopyrenyl, chrysenyl or ethyl pheryl whilst R 2  and R 3  may be anthraquinonyl, naphthyl, 3 cyanoanthraquinonyl or 3, 8 dimethoxy anthraquinonyl. The particles may be suspended on their own or with two dyestuffs in kerosene on Nesa glass and exposed either to a black-and-white or a full colour image. The dyestuffs may be Watchung Red B, Monolite Fast Blue G. S, Locarno Red X-1686, Cyan Blue GTNF, Naphtho Red B, copper phthalocyaine, Vulcan Fast Red BBE, Cyan Blue, Indofast Brilliant Scarlet and Calcium Litho Red. These particles are used in electro-phoretic imaging processes suspended in kerosene or in layer form with a binder in a frost imaging process. The frost image may be formed in a thermoplastic layer coated over the pigment layers.
Patent GB-1270186-A (GB)
Title: Working materials
IPC: B29C44/56
Filed: 1970-03-25
Abstract: 1,270,186. Cutting machine. F. J. BOYLAN, P. J. KELLY, and F .R. CATLIN, [trading as LINCO DISCOUNT SALES]. 25 March, 1970, No. 14624/70. Heading B5A. Slots are cut through tiles 10 of polyurethane foam by heated cutters 24, 25 fo closed loop form carried on a vertically reciprocal frame 16 located above a tray 11 which receives the tiles. Each cutter is of metal strip or wire and comprises an electrical resistance heater. The frame, mounted in vertical guides 15, is manually driven by a screw threaded rod 21.
Patent GB-1171748-A (GB)
Title: Improved Waste Collector Assembly for a Combine.
Inventor: WEDELL-WEDELLSBORG OVE JOACHIM
IPC: A01D41/12
Filed: 1968-03-27
Abstract: 1,171,748. Combine harvesters. O. J. WEDELL-WEDELLSBORG. 27 March, 1968 [28 March, 1967], No. 14673/88. Heading AlF. A waste collector assembly for a combine comprises a box 1, to the top 2 of which is an extension of the chaffer sieve 3. The box has a bottom 4 sloping downwardly towards a side wall 5 with a variable opening 6 communicating with a suction unit 9 and chute 10 returning material to the threshing drum or straw rack. The forward end of the box has a vertical wall 8, whilst the rear end is open. A downwardly inclined guard 11 may extend from the extension 2 to prevent light material blown over the extension from being sucked back into the chute 10. Heavy material, including grain, will pass through the extension sieve to be reprocessed, thus reducing wastage.
Patent GB-1068752-A (GB)
Title: Improved container
Inventor: AGAR ROBERT LESLIE
IPC: B65D5/64
Filed: 1965-04-07
Abstract: 1,068,752. Containers. MARDON SON & HALL Ltd. March 15, 1966 [April 7, 1965]. No. 14689/65. Heading B8P.  A container for receiving a stack of biscuits comprises a tubular sleeve and a flexible cap closing at least one end, said cap being externally concave so that it exerts a light endwise pressure on the stack and channelled along its periphery so as to receive the end of the tube within the channel to which it is sealed, as by stapling, heat-sealing or clamping the walls of the channel on to the end of the tube with or without adhesive. The cap may be a plastics, e.g. P.V.C., material, and ribbed.
Patent GB-1215634-A (GB)
Title: A thermal delay device for starting a single-phase asynchronous motor
IPC: H02P1/42
Filed: 1968-03-27
Abstract: 1,215,634. Electric heating &c. 27 March, 1968 [5 March, 1967], No. 14711/68. Heading H5H. [Also in Divisions H1 and H2] A thermal delay device for starting a singlephase asynchronous motor includes a bi-metal switch 6, 8 connected in circuit with the auxiliary winding 25 and main winding 24, the switch being opened by a heat source comprising a hollow cylinder 1 provided with an integral transverse wall 2 and heated by a resistance heater 3, and subsequently held open by a heat source 4. The bi-metal 5 and heat source 4 are initially heated by thermal conduction from wall 2. Source 4 continues to be heated by the current therethrough and heats bi-metal 5 by thermal conduction through wall 2. Parts 1, 2 comprise aluminium with an electrically insulating and thermally conducting oxide film or stoved lacquer coating, wire 3 having a similar coating. Parts 1, 2 are black so the bi-metal 5 is also heated by radiation. Source 4 comprises a P.T.C. ceramic cylinder. Parts 1, 2 may alternatively comprise ceramic. Contact 8 may be mounted on plate 10 by a spring blade 9 whose bias is adjustable through a set-screw 11 or the contact (108, Fig. 5) may be mounted on a rod (109) which is adjustably screwed into plate (110). Mains terminal 23 and winding 24 are connected to a tab 7, and winding 25 is connected to a tab 18. Winding 3 is connected to a tab 17 and contact 8. Alternatively, heat source 4 may bridge the bi-metal switch 6, 8 directly. A corrugated spring 16 is provided.
Patent GB-367653-A (GB)
Title: Improvements in hydraulic brake cylinders
IPC: F16D55/224
Filed: 1931-05-19
Abstract: 367,653. Fluid-pressure bra k e s . TEVES MASCHINEN-UND ARMATURENFABRIK GES., A., 23, Gustavsburgstrasse, Frankfort-on-Main, Germany. May 19, 1931, No. 14776. Convention date, May 19, 1930. [Class 103 (i).] To permit operation of hydraulic brakes by two independent conduits, the brake cylinder a is freely-movable axially and is divided by a partition f into two compartments connected respectively to the two conduits l, m and each containing a piston b, bl connected to a brake lever c, e<1> or directly to a brake shoe. As shown, each lever is connected to a brake shoe c, c<1> adapted to be applied to a disc. If fluid is supplied to conduit m, the shoe c is applied by the piston b and the shoe c<1> by movement of the cylinder a and piston b<1> the lip t of which remains in contact with the cylinder. If, instead, fluid is supplied to the conduit l, the cylinder and piston b move together to apply one shoe and the piston b<1> is displaced relatively to the cylinder to apply the other shoe. The brakes in the case of a vehicle may thus be applied from opposite ends of the vehicle. Adjustment for wear is effected by stops r, r<1> the adjustment of which may be automatic and by the provision of a rotatable screwed piston-rod v screwed into the pivot w by which the rod is connected to the lever e<1>. Brakes comprising a pair of shoes engaging the interior or exterior of a drum and in which the pistons are directly connected each to a shoe are also shown. In the case of a vehicle, the two conduits l, m may extend to opposite ends or to the same end of the vehicle.
Patent GB-235226-A (GB)
Title: Governing mechanism for elastic fluid turbines
IPC: F01D17/14
Filed: 1924-05-07
Abstract: 235,226. British Thomson-Houston Co., Ltd., (Assignees of Emmet, W. Le R.). May 8, 1923, [Convention date]. Addition to 215,767, [Class 122 (iv), Steam-engines, Regulating &c.]. Regulating.-The stop valves for elastic fluid turbines, arranged in series as described in Specification 215,766 are controlled by a governing mechanism as described in the parent Specification. each valve being operated by a separate fluid relay controlled by separate speed responsive means. The electric relay controlling one fluid relay is controlled by the pressure set up by a fan driven by the turbine. When the speed decreases a centrifugal governor 57 closes contacts 46 and energizes a holding coil 50 and an electromagnet 42 which operates a pilot valve 37 admitting pressure fluid to the relay cylinder 22 to open the stop valve A. The speed then increases, the governor 57 breads the circuit and spring 43 returns the pilot valve to its other extreme position opening the cylinder 22 to exhaust to close the valve A which is thus periodically opened and closed to a small extent. The valve B is actuated through similar relays by a fan 67 driven by the turbine subjecting a disc 65 in the cylinder 66 to air-pressure. The speed at which one device is set to shut its valve may be slightly above that of the other, and it then comes into action only if the action of the latter is delayed.
Patent GB-746651-A (GB)
Title: Pipe expansion compensator
IPC: F16L51/03
Filed: 1954-05-20
Abstract: 746,651. Pipe joints. INDUSTRIE-WERKE KARLSRUHE AKT.-GES. May 20, 1954 [May 28, 1953], No. 14836/54. Class 99(1). An expansion joint comprises a pair of bellows 2 connected by a rigid tube 3 and a pair of flanges 4 to which the pipe sections are connected, the flanges being connected by pivoted links 5 the pivot points 6 of which are arranged in alignment with the centres of the bellows. The tube 3 is centralised by pins 9 which are in contact with the links and are carried by brackets 8 on the tube. Curved recesses 10 in the links accommodate the pins, when the links become closer due to relative lateral movement of the flanges 4 in either direction as the pipes expand.
Patent GB-1047906-A (GB)
Title: Improvements relating to toys
IPC: A63H33/30
Filed: 1965-04-08
Abstract: 1,047,906. Motor sound-simulating toys. W. EISEN, [trading as TROSSINGER METALLSTIMMENFABRIK HANS EISEN]. April 8, 1965 [Feb. 4, 1965]. No. 14915/65. Heading A6S. [Also in Division G5] The sound of an internal combustion engine is simulated in a toy engine by a hammer 40 which is made to strike repeatedly against an anvil 46 by a battery driven electric motor 50, a cam 54 on the shaft of which displaces the rocking lever 36 of the hammer by engaging with an abutment 56 thereon (Fig. 4 not shown) in co-operation with a tension spring 58. The anvil is mounted at the narrow end of a frusto conical diaphragm 44, the other end of which is attached to a support plate 22 for the sound-producing means, disposed within the casing of the toy engine. Holes 48 allow the whole of the interior of the casing to act as a resonance chamber. The speed of the electric motor, and the sound produced may be varied by a control switch connected to leads 78 and 80.
Patent GB-1397851-A (GB)
Title: High speed copy machine
IPC: G03B27/62
Filed: 1973-03-28
Abstract: 1397851 Electro-photography APECO CORP 28 March 1973 [19 April 1972] 14956/73 Heading G2H A photo-copy machine comprises, a generally rectangular cabinet frame 12, a generally horizontal exposing window 16 at one top end of the frame 12, means in the frame 12 defining a processing path for a copy sheet having an inclined charging and exposing leg 19, 20, a bottom substantially horizontal development leg 21, and a long vertical drying leg 22, the legs together forming a path of right triangular shape in which the drying leg 22 extends vertically upwardly and with the copy sheet facing outwardly of the triangular path, an optical system 23 in the frame 12 defining a dog leg optical path 24 including a lens 110 and mirror 120 and in which the optical axis extends vertically downward from the exposing window 16 and then angularly downward for perpendicular intersection with the exposing leg 20, and a rack 31 in the frame 12 for supporting a roll 17 of copy paper in the angle of the dog leg optical path 24 between the optical path 24 and the processing path charging and exposing leg 19, 20. Copy sheets are cut off from the roll 17 and are fed in succession through a corona charging unit 19 to the exposing station 20 where they are exposed, without halting their movement, to the focused image of a document to be copied instantaneously illuminated by a pair of electronic flash tubes 25. The mirror 120 and lens 110 are mounted for movement between a first position, for producing a same size copy of a document, and a second position, for producing a slightly reduced size copy of a larger, e.g. legal size, document. The document to be copied is fed face upwards into a surface feeding guide 166 of a unit 15 where a drive 167 turns it over and a transport device 171 positions it face downwards on the window 16. The document receiving unit is pivotally mounted so that it can be swung out of the way to allow for the copying of book pages. The surface feeding guide 166 may be removed and replaced by a stack feeder (188) Fig. 18 (not shown). Development is effected by passing each exposed copy sheet image side down over a driven foraminous belt 73 soaked in a liquid developer. The sheet then passes through squeegee rollers 77 and is turned around driven cords 81 on to a plurality of vertically moving belts 82 past drying fans 83. The sheet is held to the cords 81 and to the belts 82 by air jets from a plenum 84 and by a vacuum chamber 86 respectively. Finished copy sheets leaving the machine may be directed by pivotable diverter plates 97' either to a tray 97 or through exit rollers 108 and an opening 104 to a collator 17a (not shown) or a copy receiving basket. The machine may be operated to produce single or multiple copies. A control circuit for the machine, Figs. 23a-e (not shown), includes automatic means to disable the machine drive elements in response to automatic detection of a paper jam at any of a number of points in the machine.
Patent GB-650498-A (GB)
Title: Flotation of ores
IPC: B03D1/012
Filed: 1948-06-03
Abstract: Ores are concentrated by subjecting them to froth flotation in the presence of a promoter having as an essential promoting constituent a reaction product of a glycol chloroformate with at least one and not more than two mols of an alkali metal alkyl xanthate.  Ores treated include copper, zinc and lead ores and gold-bearing pyrites. Specifications 275,561, 284,198, [both in Class 82 (ii)], and 650,493, [Group IV (b)], are referred to.
Patent GB-1098933-A (GB)
Title: Toothbrush
IPC: A46B9/04
Filed: 1965-04-08
Abstract: 1,098,933. Toothbrushes. SUNBEAM CORPORATION. April 8, 1965 [May 15, 1964], No. 15019/65. Heading A4K. A tooth brush has its head 14 formed on its tuft receiving face 16 with alternating, transverse receses 20 and projections 18 to receive rows of tufts 24 embedded in openings in the face 16, each tuft 24 being formed of intermingled long and short bristles in such manner that their free ends define at least three and preferable four distinct levels A, B. C. D with respect to the base plane X-X. The tufts 24 may be staggered or aligned in the longitudinal direction of the brush and the projections 18 may be fitted with fewer tufts 24 than are the recesses 20. In one embodiment (Figs. 5, 6) the projections 18<SP>11</SP> each accommodate two tufts 30 which are inclined towards each other inwardly from their root ends.