baber/WOPTO huggingface dataset:
Patent GB-1494756-A (GB)
Title: Copy resistant documents
IPC: G03C5/08
Filed: 1975-02-18
Abstract: 1494756 Copy resistant documents CALSPAN CORP 18 Feb 1975 6833/75 Heading B6A At least some portions of a document are provided with a background which has a reflectance sufficiently low at wavelengths to which a detector of a copying machine is most sensitive to render low reflectance indicia on the document resistant to copying, but the background reflectance, is high enough at wavelengths to which the detector is least sensitive to permit detection of the indicia with the human eye. In the figure, typical eye sensitivity as a function of wavelength is shown as curve X, typical copy machine detector sensitivity as curve Y, the reflectance of an ink used for marking indicia on the document as curve I and the reflectance of a suitable ink background coating as curve Z. The reflectance of the background remains low and for the most part less than that of the marking ink in the range of wavelengths in which the copying machine detector is sensitive. Thus the detector cannot distinguish the indicia from the background and cannot make a good copy of the document. The background coating may be an orange/red ink on a dull black paper. Alternatively, a grey/  black ink may be sprayed on to a white paper to produce coated edges and an uncoated centre.
Patent GB-668001-A (GB)
Title: Method and apparatus for refrigeration by a circulating cooling medium
IPC: F25C1/145
Filed: 1950-03-20
Abstract: 668,001. Refrigerating. AKTIESELSKABET, T. T., SABROE & CO. March 20, 1950 [April 27, 1949], No. 6850/50. Class 29. A circulated cooling medium is constituted by water containing fine particles of ice and is withdrawn from a tank to which ice particles are continuously added. Water from an air cooler 38 flows into a rotating trough 42 whence it is sprayed by a pipe 44 on to the wall of a stationary cylinder having a refrigerant jacket 12. Ice formed is removed by a scraper 30 rotating with the trough 42 and the ice and water fall into a tank 10 from which the mixture is circulated by a pump 34 back to the cooler 38. In a modification, the cylinder is immersed in water, the ice particles floating to the top of the tank 10 whence the circulation is taken off, the return liquid entering the bottom of the tank 10. Instead of using rotary scrapers, the cylinder may rotate. The axis of the cylinder may be horizontal. The scraper blades are pivoted to their supports and are spring- controlled so that, if they should meet with high resistance, they will ride over the obstruction.
Patent GB-193692-A (GB)
Title: Improvements in control systems and apparatus for dynamoelectric machines
IPC: B63H23/24
Filed: 1922-03-08
Abstract: 193,692. Cachemaille, A. S., (Westinghouse Electric & Manufacturing Co.). March 8,1922. Electric motor control systems.-Relates to control systems and apparatus for a number of motors grouped in pairs and having shunt fieldwindings, each pair working independently as in the propulsion of submarines. Systems for continuous-current motors; seriesparallel systems.-Each pair of motors is provided with armature resistances, not shown, field resistances consisting of two equal sectional resistances 40, 41, Fig. 2, a master controller 34, and a series-parallel drum 35. The arrangement allows armature-circuit control and field-circuit control to be effected successively and permits change from series to parallel, or vice versa, only during armature circuit control. The field strength of the two motors is first equalized by adding the necessary amount of resistance to the field of one of the motors by means of a rheostat switch 37. In the preparatory stage of control, the resistances 40, 41 are gradually cut out of the field circuit. Continued movement of the master controller successively connects the motor armatures in series, cut out armature resistance, and connects the motor armatures in parallel. The final stage of control reinserts resistance in the field circuit. Similar sequences of operations take place in reverse running, for which the lower portion of the speed drum, as shown in Fig. 2, is used. A separate series-parallel master switch 35 is inferlocked with the speed drum. A change-over switch 38 allows the field to be connected direct to a battery 39 in case the master controller is out of action. Controllers, drum.-The complete controlling gear for two pairs of motors, as shown in Fig. 6, comprises two master controllers 108, 109 actuated independently of each other by hand wheels 104, 105 through chain and sprocket gearing. Each hand-wheel has obstructing notches and a releasing pin 136 which must be depressed before the wheel can be moved from the initial position. The series-parallel switch 35 actuated by a removable handle 126, and two drum-switches 36, 120 for cutting out either motor of a pair at will, actuated by handles 106, 107, are mounted with the master controllers in a compartmented casing with the actuating handles on the outside. Controllers, interlocking. - Mechanical interlocks between each of the hand-wheels and the series-parallel handle 126 prevents the seriesparallel switch from being moved from an operating position to the off position unless the master controller occupies either the off positions or one of the series actuating positions, and reciprocally prevents the hand-wheels from being moved from these positions if the series parallel switch is'in its off position.
Patent GB-525900-A (GB)
Title: Improved means for holding stoppers in containers
IPC: B65D45/28
Filed: 1939-03-02
Abstract: 525,900. Closures for carboys and bottles. BERK, A. D., and BOOER, J. R. March 2, 1939, No. 6901. [Class 125 (iii)] The stopper of a carboy jar or like container is held in position in the container neck by means of an elastic annular band 1 round the neck and an elastic transverse strip 2 which passes over the stopper. The strip may be in one or two portions with a strengthening piece 5, and it has central upstanding lugs 4 to afford a hold. The parts may be formed of L-shaped or Z-shaped strips, and the container may be formed with a rib on the neck below which the band 1 fits.
Patent GB-667164-A (GB)
Title: Improved methods of coating ferrous metals with aluminium
IPC: C23C2/12
Filed: 1948-03-06
Abstract: Ferrous metal is coated with aluminium or an aluminium alloy by heating the metal in a fused salt bath containing 37-57 per cent potassium chloride, 25-45 per cent sodium chloride, 8-20 per cent cryolite (or an equivalent proportion of sodium fluoride and aluminium fluoride), and 0.5-12 per cent aluminium fluoride, with or without lithium chloride, the bath being activated by contact with aluminium and being at a temperature of 1200-1600 DEG F, and dipping the metal, whilst at a temperature at least as high as the melting point of the coating metal, into the molten coating metal. The fused salt bath may float on the bath of molten coating metal or be contained in a separate vessel, e.g. an aluminium-coated vessel.  The metal may be preheated in a non-oxidizing atmosphere to the bath temperature or may be heated in the bath itself; prior to immersion, it may be degreased, pickled in aqueous hydrochloric acid and immersed in a flux of 32 parts zinc chloride, 8 parts ammonium chloride and 60 parts water.  After coating, excess metal may be removed whilst in the molten or mushy condition by vibration, rotation or air-blast.  A plurality of ferrous metal parts, preliminarily tacked together, may be bonded by this method.  In a modification, after treatment in the fused salt bath, the heated metal is immersed in a molten zinc alloy bath containing 0.5-12 per cent aluminium, and aluminium then applied by casting.  Coating alloys referred to are 5-15 per cent silicon, balance aluminium; 4 per cent copper, balance aluminium; 7 per cent tin, balance aluminium; 5-20 per cent zinc, balance aluminium.  The Specification as open to inspection under Sect. 91 comprises also a reference to a salt bath of 27 per cent sodium fluoride and 73 per cent sodium chloride.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1440873-A (GB)
Title: Nut nut-screw assembly and valve-actuator including same
IPC: F16B33/00
Filed: 1974-02-15
Abstract: 1440873 Nut and nut-screw assembly PLASSON MAAGAN MICHAEL INDUSTRIES Ltd 15 Feb 1974 [26 Feb 1973] 7030/74 Heading F2H A nut, see Fig. 3, comprises a body member 22 having a cylindrical bore 24 extending through it and a recess 26 communicating with the bore and extending radially therefrom to one face of member 22 intermediate its ends, said recess having walls 28, 30, substantially tangential to the bore and perpendicular to the transverse axis 32 thereof, and the bore having threads 42 only in that portion coextensive with the recess. The nut may be integrally formed with an arm 10 which acts as a float arm in a floatoperated liquid level control system. The nut may be used in combination with a screw 20, see Fig. 4, having a head 52 provided with ribs 62 and grooves 63, in which a retainer element (Figs. 1, 2, not shown) carried by arm 10 may seat. The portions of the bore extending through the end walls of member 22 may be of different diameter, e.g. one portion having a diameter equal to the diameter of the roots 46 of the threads 42 and the other portion having a diameter equal to the diameter of the crest 44 of the threads 46.
Patent GB-899743-A (GB)
Title: Screw press for heat mouldable synthetic plastics
IPC: B29C48/525
Filed: 1961-02-27
Abstract: 899,743. Compression mixers. BERSTORFF MASCHINENBAU - ANSTALT G.m.b.H., HERMANN. Feb. 27, 1961 [Feb. 25, 1960], No. 7084/61. Class 86. A compression mixing machine has intermeshing tapered screws 2, 3 arranged vertically one above the other; their flights may have slots around the periphery, see Fig. 2 (not shown). There may be passages 5, 6 for a heat exchange medium.
Patent GB-1418930-A (GB)
Title: Manufacture of panels
IPC: B29C43/00
Filed: 1973-02-14
Abstract: 1418930 Conveyers; hoppers BORDEN CHEMICAL CO (FRANCE) and TECHNAB 14 Feb 1973 [15 Feb 1972] 7197/73 Headings B8A and B8S [Also in Division B5] An endless conveyer comprises a plurality of plates 61 (Fig. 11) moved over rollers 87, 88 by co-operating gear-wheels 82, 83 and depending chain links 78, 79. While moving from left to right of an upper horizontal roller path 131 (Fig. 15), the plates 61 are interconnected by hooks 69 (Fig. 8) and pins 73 automatically engaged by spring arms 170, and by co-operating projections and apertures 66-68 (see also Fig. 10). At the right hand end of the path 131 (Fig. 18), the hooks are automatically disconnected by cams, and the plates 61 lowered on a roller table 143 by screw-threaded adjusters 141, 144, while material carried by the plates is held by a suction head 145. The plates 61 are then removed to the left by high speed rollers 154, and are raised to the start of the upper horizontal path 131 by adjusters 163, 166. Material to be moulded (see Divisions B4-B5) is fed on to the plates 61 by a hopper having diverging channels 41 (Fig. 5) and a smoothing roller in its outlet. Material is fed into the hopper by a pair of parallel spray bars 29, 33 (Fig. 3). Moulding is effected by rollers 218 (Fig. 18) that are lubricated by silica dust applied by a pneumatic conveyer. Compressed air is fed to the bottom 205 and side 211 of a tank 201 containing silica dust. The air is supplied at 10 second intervals to blow clouds of dust through a pipe 215 and on to the roller 218.
Patent GB-587935-A (GB)
Title: Improvements in or relating to the manufacture of electric condensers
IPC: H01G13/00
Filed: 1944-04-19
Abstract: 587,935. Coating strip metal. STANDARD TELEPHONES & CABLES, Ltd., BARNARD, R. M., and SAGE, J. A. April 19, 1944, No. 7237. [Class 140] [Also in Group XXXVI] Copper &c. foil 1 from a reel 2 is passed between flattening rollers 3, washed in a bath 4 of trichlorethylene, dried between drying plates 5, and then passed through a solution 6 of polystyrene or styrene derivatives in trichlorethylene or benzene, to provide an insulating coating on the foil, in the manufacture of electric condensers (see Group XXXVI). Dichlorostyrene or other non-polar compounds of chlorine with styrene are preferred, and may be loaded with a ceramic dust. The insulating coating may be dried by means of radiofrequency eddy currents produced in the metal foil by electrodes 7, producing an air and solvent-free coating. In a modification, Fig.. 4 (not shown), the foil is passed through the polystyrene &c. bath in such a manner as to leave one edge uncoated.
Patent GB-731398-A (GB)
Title: Improvements in or relating to canopies or blinds
IPC: E04F10/08
Filed: 1953-03-16
Abstract: 731,398. Sun awnings. BUDD, C, H, March 15, 1954 [March 16, 1953], No. 7238/53. Drawings to Specification. Class 20 (3). A canopy or blind comprises a frame with parallel slats secured across it but spaced from one another so as to allow air to pass between them. The slats are preferably made of thin gauge metal such as aluminium.
Patent GB-520012-A (GB)
Title: Improvements in apparatus for spraying printed sheets in printing presses
IPC: B41F23/00
Filed: 1939-03-06
Abstract: 520,012. Set-off, preventing. BEREGH, T. J. March 6, 1939, No. 7242. [Class 100 (ii)] A spraying device 19 for applying offset preventing material to printed sheets is adapted to be automatically actuated by either or both of a pair of moving parts of the press. One part may be an arm 30 connected to the inking mechanism and serving to trip that mechanism at the end of the stroke of the printing bed and also when the press throw out mechanism is operated, and the other part may be arm 48 of the sheet delivery mechanism which operates as long as the press is running. The air supply to the sprayer may be obtained from the cylinders 13 which cushion the movements of the bed and the air valve of the sprayer is opened by a trigger 21 connected by linkage 22, 43, 42 to a lever 41, one end of which may be connected by a detachable link 47 to the arm 48 and the other end of which is connected by a chain 40 to a rod 37 connected to one end of a lever 34, the other end of which is connected by a chain 35 to the arm 30. A spring 39 on the rod 37 acts to open the air valve of the sprayer when permitted by the arm 30. Specification 478.619 is referred to.
Patent GB-526037-A (GB)
Title: A method for producing an electroplated tin coating on other metals, particularly iron or steel sheets or strips
IPC: C25D3/60
Filed: 1939-03-06
Abstract: 526,037. Electrodeposition of tin alloys. REMY, VAN DER ZYPEN & CO. March 6, 1939, No. 7326. Convention date, March 7, 1938. [Class 41] In forming electroplated tin coatings on metals such as iron or steel sheets for making preserve tins, a small quantity of bismuth or antimony salts is added to the plating bath. Cadmium salt may also be added. The plated article is heated under a protective film of oil or tallow to render it dense. The plating bath contains also sulpho-acids, colloids, glycerine, mannite &c. The composition of the anode corresponds with that of the coating obtained.
Patent GB-326658-A (GB)
Title: Improvements in secateurs or pruners
IPC: A01G3/025
Filed: 1929-03-06
Abstract: 326,658. Oakley, E. C. F. March 6, 1929. Shears. - A device for pruning trees, having a fixed stem of tubular or channelled shape formed with a cranked handle 2 and a bifurcated end, has a fixed blade 3 secured thereto bv a rivet 4 and fitted into the bifurcation at one end. An operative member 7 engages at 11 a movable handle 12 pivoted at 13 to the fixed member 1, is formed at the other end with a closed slot 8 to slide on the rivet 4 and with an open slot 9 to engage a pin 10 on a moving blade 6. A spring 14 normally maintains the blades in the open position, and the fixed blade has a hook-shaped end, chamfered on the inside as shown at 16.
Patent GB-144411-A (GB)
Title: Improvements in apparatus for propelling projectiles
IPC: F41B6/00
Filed: 1919-03-24
Abstract: 144,411. Villeplee, A. L. O. Fauchon-. March 24, 1919. Ordnance, electro-magnetic. -Relates to guns of the kind described in Specifications 144,409 and 144,410, wherein a magnetic field is set up across the bore of the gun, and an electric current is passed across the projectile at right-angles to the magnetic field. The invention consists in the use, for energizing the gun, of the current induced in the secondary of a transformer when the current in the primary is cut-out or reversed. One arrangement is shown diagrammatically in Fig. 1; Fig. 2 is a transverse section of the gun. 3 and 4 are the primary and secondary windings. of a direct current transformer 2. The primary winding is in series with a generator 1, and the secondary circuit includes the projectile guiderail 5, projectile P, guide-rail 6, and the field-winding bars 7, 8, 9, 10 of the electro-magnet 17, 18, 19 of the gun. A switch 11, 12, 13, 14, 15, 16 is provided to operate the gun. The switch may be arranged to reverse the current through the primary coil. In modifications, (1) the secondary circuit includes the rails 5, 6 and projectile P only, the field windings of the gun being separately energized; (2) the field windings of the gun constitute the primary coil, and the rails 5, 6 are conneced at their rear ends to form a closed secondary circuit through the projectile P; (3) a second transformer is used, the primary winding of which is in series with the secondary winding of the first transformer; (4) the induced current is supplemented by a current from an independent source flowing in parallel therewith. The primary current may be broken by the melting of a wire.
Patent GB-662175-A (GB)
Title: Improvements relating to the application of lock washers to nuts
IPC: F16B39/26
Filed: 1949-03-17
Abstract: 662,175. Making lock-nuts. EVERY, C. E. (Illinois Tool Works). March 17, 1949, No. 7369/49. Class 83 (ii). [Also in Group XXV] In the production of nuts, with attached lock-washers, from bar stock, the end of the bar is first deeply centred, then drilled to a depth slightly greater than the thickness of the nut, the remains of the centring providing a countersink, the end of the bar is faced, leaving a thin neck 28, Fig. 11, an external groove is turned, forming the chamfer on the nut, and the end of the bore is chambered at 60, the bore thus countersunk at both ends permitting tapping without the formation of burrs, a toothed lockwasher is applied and loosely secured in place by spinning over the end of the neck by the bevelled end of a tool 62, Fig. 16, parting off at the external groove completing the manufacture.
Patent GB-667385-A (GB)
Title: Improvements in or relating to nesting trays or the like
IPC: B65D21/02
Filed: 1949-03-18
Abstract: 667,385. Nesting trays. JOSEPH, Ltd., N. C., and JOSEPH, N. C. March 20, 1950 [March 18, 1949], No. 7405/49. Class 18 Corner brackets 4 are secured to the exterior wall surfaces of a tray 1 and are provided with webs 5 for the reception of a superposed tray. The walls are strengthened by an outwardly turned portion 3. The tray may be made from aluminium or other sheet metal and the brackets may be fixed by welding, riveting or soldering.
Patent GB-804873-A (GB)
Title: Distress alarm system
IPC: H04L15/26
Filed: 1957-03-06
Abstract: 804,873. Circuits responsive to predetermined code signals. BOWER, R. E. NOTT-. March 6, 1957, No. 7469/57. Class 40 (1). An alarm circuit is responsive to the reception of a signal comprising n dashes of one predetermined duration separated by n-1 spaces of another predetermined duration. As described, for a signal comprising three dashes of four seconds duration separated by two spaces of one second duration, the dash-responsive relay I is energized during the persistence of the first dash to open its contacts i1, i2. The opening of contacts i2 causes the condenser C3 to begin to charge from the battery B3 through the resistance R3, the circuit parameters being so adjusted that after 14 seconds of uninterrupted charging the valve V3 begins to conduct. The opening of contacts i1 causes the condenser C1 to begin to charge at such a rate that after 3¢ secs. the valve V1 conducts, thereby energizing the relay D35 to close the contacts d35 which enables the valve V2 to conduct energizing the relay 815. When the first space begins, contacts i1 and i2 close, cutting off the valve V1 to de-energize the relay D35 and open the contacts d35. The condenser C2 then begins to charge via R2 from the battery B2, the circuit parameters being chosen so that the the contacts s15 will close 1¢ secs. after C2 has been open-circuited, so that C3 is open-circuited throughout the one second space. This action is repeated during the second and third dashes and spaces, but after the third dash, C3 has been open-circuited for 14 secs. and the valve V3 conducts to energize a bell relay B. Action on receipt of wrongly-timed signals. If a dash is of too short a duration, relays D35 and S15 will not operate so that the condenser C3 will be short-circuited via the contacts s15 and i2. If a dash is of too long a duration, the relay D45 whose contacts will not close unless the dash exceeds 4¢ secs. energizes to short-circuit the condenser C3 through the contacts d45. If a space is of too long a duration, relay S15 will de-energize to short-circuit and discharge the condenser C3.
Patent GB-1262815-A (GB)
Title: Improvements in fuel injection systems for internal combustion engines
Inventor: MENNESSON ANDRE LOUIS
IPC: F02M69/04
Filed: 1970-02-17
Abstract: 1,262,815. Regulating I. C. engine fuel supply; electromagnetic injectors. SOC. INDUSTRIELLE DE BREVETS ET D'ETUDES. Feb. 17, 1970 [Feb. 25, 1969], No. 7508/70. Heading F1B. The flow of fuel to an injection orifice 5 is controlled in accordance with the position of an auxiliary throttle member 3 upstream of the main throttle valve 2 and the injection orifice is aligned with an orifice 6. The space between the orifices 5 and 6 forms part of a chamber 8 communicating with the induction passage portion B between the member 3 and the valve 2 at least at low air-flows. The member 3 is moved against the bias of the spring 14 by a diaphragm 10 subjected to the pressure in induction passage portion B in chamber 11 and the pressure upstream of the member in chamber 12. In a further embodiment, Fig. 2 (not shown), the auxiliary throttle butterfly valve (3a) is operated by a diaphragm (10a) and the port (9a) opening to the induction passage 1 from the chamber 8 is downstream of the auxiliary throttle valve (3a) with the valve slightly open and upstream of the valve with the valve more fully open. The fuel control needle 18, 19 is operated by a solenoid 17 which is energized for a fraction of each of the rotations of a rotary member. The solenoid may be energized as described in Specification 1, 207, 228.
Patent GB-566871-A (GB)
Title: Improvements in or relating to insulators for high tension electrical transmission systems
IPC: H01B17/46
Filed: 1943-05-12
Abstract: 566,871. Electric insulators. CLARK, C. H. W., and STEATITE & PORCELAIN PRODUCTS, Ltd. May 12, 1943, No. 7544. [Class 36] The fittings for securing insulators for high - tension systems together or to supports have arc-deflectors 15 which project over the fittings and are directed away from the insulators. In the form shown, the insulator 1 has an integral shoulder 12 secured by cleats 13 and bolts 14 to a transformer casing 5. The arcing member 15, integral with the cleat 13 or secured between the cleat and the bolt head, deflects the arc towards the usual arcing ring 16 which is supported by members 17. In a modification, the deflector is integral with or connected to the stem of the bolt or to a second nut, when a stud and nut are used.