baber/WOPTO huggingface dataset:
Patent GB-1023043-A (GB)
Abstract: 1,023,043. Measuring bridges. WAYNE KERR LABORATORIES Ltd. June 12, 1963 [June 14, 1962], No. 22973/62. Heading G1U. An electrical bridge for comparing an impedance with a known impedance comprises first and second adjusting means for balancing the bridge, the first adjusting means effecting adjustment of a signal applied to one of the impedances in a first set of steps of equal magnitude, and the second adjusting means effecting adjustment in a further set of steps of finer magnitude to give adjustment within one step of the first set; and means are provided responsive to the out-of-balance signal automatically to effect adjustment of the first means until a balance is passed, and then to effect a fine adjustment in the opposite direction towards balance with the second adjusting means. Current is supplied to the unknown impedance 10, Fig. 2, from a tapping on a secondary winding of transformer 12 and passes through a primary winding of an output transformer 20. Secondary winding 15 of transformer 12 is provided with a series of taps 25, there being 1000 units of voltage between adjacent taps. Contacts 31 and 32 are adapted to make contact with any selected pair of adjacent taps and feed a further winding 30 which is similarly tapped in divisions of 100 units of voltage; similarly winding 45 is divided into tens of units of voltage and winding 50 into units of voltage. The output from winding 50 fed through switch 102 to standard impedance 100 or 101 which is connected through switch 103 to a primary winding of transformer 20. The secondary of transformer 20 feeds an amplifier and a phase-sensitive detector 64. In operation, contacts 31 and 32 are stepped by means not shown until detector 64 shows that the current through the standard impedance exceeds that through unknown impedance 10. The detector 64 then operates stepping switch 65 to cause contacts 41 and 42 to reduce the current in steps until detector 64 again changes over, and so on. This balances and measures the major component (i.e. resistive or reactive) of the unknown impedance. The minor component is balanced by a potential dividing circuit which may comprise a resistance 105 and a bidirectional transistor 106. The impedance of transistor 106 is controlled by the output of a phase sensitive detector 107 fed with a reference phase in quadrature with that supplied to detector 64. The voltage across transistor 106 is fed through impedance 109 to transformer 20, and is measured by meter 110 to give the ratio of the minor to the major term of the unknown impedance. Impedance 109 is opposite to the standard impedance 100 or 101 (i.e. is resistive is the standard is capacitive and vice-versa) and switching means (not shown) may be provided for using whichever of the two impedances 100 or 101 is not being used as a standard as the impedance 109. Switches 102 and 103 allow measurements to be made over all four quadrants of the complex impedance plane. A thermistor may be used instead of transistor 106, Fig. 3 (not shown).
Patent GB-1054153-A (GB)
IPC: F24D19/04
Abstract: 1,054,153. Skirting convectors; air flow control valves. REPCO PRODUCTS CORPORATION. Oct. 12, 1965 [Nov. 17, 1964], No. 43226/65. Headings F4S and F4V. A skirting convector comprises a back panel 10, on which are mounted a series of spaced mounting brackets 18 which support both a front panel 50 and, by means of wire clips 65, a finned fluid heat a transfer pipe 47 in metal envelope 49, and a supply or return fluid pipe 70 extending parallel thereto. Each bracket 18 further carries an arm 33 mounted on a pivot pin 34, over which arms damper vane 57 snap engages to regulate the air flow over the heat transfer pipe 47. The damper vane 57 is movable from the open position shown, wherein it is held open by the arm 33 resting against abutment 40, to a horizontal closed position, or any other intermediate position.
Patent GB-1229663-A (GB)
IPC: B32B15/08
Filed: 1968-09-06
Abstract: 1,229,663. Laminated flat building components. BADISCHE ANILIN- & SODA-FABRIK A.G. 6 Sept., 1968 [8 Sept., 1967] No. 42426/68. Heading B5N. A flat building component comprising an inner ply of a thermoplastics material and outer plies of metal is produced by continuously extruding a board having a thickness of 1 to 20 mm. from a polyethylene having specified properties at a temperature of the material of 120‹ to 220‹ C., continuously covering each side of the board first with a film having a thickness of 0À01 to 0À2 mm. and consisting of a terpolymer containing in polymerized form 60 to 90% by weight of ethylene, 0À5 to 20% by weight of an ethylenically unsaturated carboxylic acid and 0À5 to 20% by weight of an ester of an ethylenically unsaturated carboxylic acid and then with metal sheeting 0À05 to 1À5 mm. in thickness and making the whole into a sandwich assembly under a roller pressure of 0À1 to 4 kg/cm. and cooling, to ambient temperature. Specified terpolymers are (a) one containing 71 to 90% by weight of ethylene, 3 to 9% by weight of an aliphatic ethylenically unsaturated carboxylic acid having 3 to 5 carbon atoms and 1 to 20% by weight of an alkyl ester (with 1 to 8 carbon atoms in the alkyl radical) of an aliphatic ethylenically unsaturated carboxylic acid having 3 to 5 carbon atoms and (b) one containing 71 to 90% by weight of ethylene, 3 to 9% by weight of acrylic acid and 1 to 20% by weight of tertiary-butyl acrylate. Specified metals are aluminium, copper, brass and steel.
Patent GB-1230419-A (GB)
IPC: F25B9/08
Filed: 1968-07-24
Abstract: 1,230,419. Refrigerating. N. V. PHILIPS GLOEILAMPENFABRIEKEN. 24 July, 1968 [27 July, 1967], No. 35367/68. Heading F4H. In a refrigeration or gas liquefaction system of the type in which high-pressure fluid is cooled to below its inversion temperature and supplied to the jet nozzle of an ejector whose suction inlet is connected to a low-pressure reservoir, the temperature of the cooled highpressure fluid prior to its entry into the nozzle is adjusted so that the enthalpy of the fluid is substantially that given by the constant enthalpy curve which is tangential to the boundary of the liquid-vapour region of the temperature-entropy diagram for that fluid. As shown, helium from a compressor 1 is cooled in heat exchangers 3, 7, 10 in counterflow with low-pressure helium and in heat exchangers 5, 8 by cold gas refrigerators 6, 9. A valve 11 directs the cooled high-pressure helium through a heating path 12 and a cooling path 12 in such proportions that the desired temperature is achieved when the streams are recombined at 14. Path 12 is electrically heated or connected by a copper strap to a higher temperature part of the system, while path 13 includes a heat exchanger 25 immersed in liquid helium in a reservoir 19. The recombined stream is supplied to the nozzle 15 of ejector 16 whose outlet is connected to reservoir 19. Helium vapour returns to the inlet of the compressor from reservoir 19 while liquid helium passes via a throttle 22 to a reservoir 23 which is connected by line 24 to the suction inlet of the ejector. In a first modification the cooled high-pressure helium passes sequentially through the heat exchanger in reservoir 19 and the heating device (Fig. 3, not shown) while in a further modification (Fig. 4, not shown) the heating device is omitted and a regulable part of the helium is tapped off from heat exchanger 8 or 10 or a point therebetween and recombined with the part which has passed through reservoir 19.
Patent GB-1238250-A (GB)
IPC: C01B25/39
Filed: 1969-04-24
Abstract: 1,238,250. Alkali metal polyphosphates. KNAPSACK A.G. 24 April, 1969 [16 May, 1968], No. 20970/69. Heading C1A. Alkali metal polyphosphates are produced by a continuous process from elementary phosphorus, an alkali metal hydroxide or carbonate and a free oxygen-containing gas by atomizing the alkali metal hydroxide or carbonate in a reaction zone, preferably lined with graphite, directly into or in the immediate vicinity of a flame produced by burning liquid phosphorous, removing molten reaction product from the reaction zone, supplying the gases issuing from the reaction zone to a gas scrubbing zone and recycling aqueous scrubbing solution obtained in the scrubbing zone to the reaction zone, the solution being freed prior to recycling from arsenic contained in the issuing gases by treatment with an alkali metal sulphide or hydrogen sulphide, which process comprises recycling to the reaction zone a quantity of scrubbing solution sufficient to produce a steam partial pressure of more than 450 mm. mercury. The alkali metal polyphosphates contained in the scrubbing solution are hydrolysed by allowing the solution to stand for at least 1 hour at 80 C. at a pH of #3 prior to precipitating the arsenic contained therein by treatment by an alkali metal sulphide or H 2 S. The pH is established by the addition of acid, preferably phosphoric acid. The quantity of sulphide used is at least five times the amount theoretically required for precipitating the arsenic and after its addition the solution is allowed to stand for more than one hour, preferably 1.5 hours before filtering off the precipitate, and the filtrate recycled to the reaction zone.
Patent GB-1238562-A (GB)
IPC: H01R4/48
Filed: 1969-05-12
Abstract: 1,238,562. Electric couplings. G. P. L. DUMESNIL. 12 May, 1969 [22 May, 1968], No. 24077/69. Heading H2E. An electric coupling comprises a plug 6 and a socket 1 preferably of flexible plastics comprising a guide tube for a wire 2 whose bared end 2 1  is folded over an inner wall separating the guide tube from a sleeve 7 into which the plug 6 is inserted to make contact with the bent-back bared end 2 1 . The inner wall is cut away from the mouth of socket 1 where a reinforcing web may be disposed (Figs. 6-8, not shown). Sleeve 7 has a slot 8 which may be covered by a flap (14, Fig. 7) integral with one edge of the slot and tucked behind the other edge. Alternatively slot 8 may be covered by a flap (17, Fig. 9, not shown) latched on to one side of the sleeve and either hinged or attached by a latch and a cord to the other side of sleeve 7. Sleeve 7 may be shaped to receive a flat plug (Figs. 1, 2, not shown) or a tubular plug attached to a lead wire whose bared end is folded over the mouth of the tube so that it can make direct contact with the bared end of the wire 2 (Fig. 5, not shown). The plugs may have dimples which mate with projections on the internal surface of the reinforcing webs or sleeves. A plurality of sockets may be formed as an integral block.
Patent GB-1250621-A (GB)
IPC: E05F3/10
Filed: 1967-11-03
Abstract: 1,250,621. Door closer device with back check. DOR-O-MATIC (G.B.) Ltd. 25 Oct.; 1968 [3 Nov., 1967; 1 Feb., 1968], Nos. 50057/67 and 5203/68. Heading E2M. [Also in Division F2] A door closer device of the usual type as shown, wherein main pistons 34 and 36 operate in parallel cylindrical bores 38 and 40 against the action or springs 42 and 44 and are connected to a pair of plates 20 and 22 slidable in a cavity 26 in the housing 10, which plates carry between them roller followers 16, 17, 18 bearing on a cam 14 secured to a shaft acting on the door, is provided' with at least one auxiliary piston and cylinder device which provides an increasing resistance to the opening of the door. Preferably there are two auxiliary pistons 74 and 76 operating in cylinders 70 and 72 against the action of springs 78, the piston heads abutting the adjacent end of the pair of slidable plates 20 and 22. A tapered flat 80 is formed on the surface of each piston 74 and 76, such that the flat is deepest at the end of the piston further from the plates 20, 22 and runs out part way along the piston. As the door is opened in either direction the cam 14 rotates to move the slidable plates 20 and 22 which thrust the pistons 74 and 76 into their cylinders, progressively reducing in cross-section the passages formed by the flats 80 until the passages are completely closed. This action produces an increasing resistance to motion until the door is prevented from opening further. Details of construction and manufacture are given; the door closer is suitable for being sunk in the floor or door frame. The cam 14 may have recesses 46, 48 to engage rollers 16 or 18 to hold the door open.
Patent GB-1251764-A (GB)
IPC: B60K15/06
Filed: 1970-03-26
Abstract: 1,251,764. I. C. engine fuel supply systems. FORD MOTOR CO. Ltd. March 26, 1970, No.14720/70. Heading F1B. The cross-sectional area of the fuel inlet 9, 11 to a diesel engine supply pipe 3 from the fuel tank 1 is reduced by a float 13 when the fuel in the tank falls to a certain level, so that the maximum power the engine can develop is substantially reduced.
Patent GB-1252154-A (GB)
IPC: D06J1/00
Filed: 1968-08-29
Abstract: 1,252,154. Pleating and stretching apparatus. PERFECT PLEAT PRODUCTS, CO., Inc. 29 Aug., 1968, No. 35996/68. Heading D1S. Apparatus for pleating and stretching  draperies has a pair of upwardly extending, spaced apart, rigid channel members 11 and 12. A horizontal hanger bar 86 is vertically movable along 11 and 12 and has hooks for hanging a drapery therefrom. A pleater bar assembly extends horizontally between 11 and 12 below hanger bar 86 and is vertically movable. This assembly has a first pleater bar 19 with projecting comb-like blades 22 which extend into the space traversed by the drapery hung from 86. An arcuately movable second pleater bar 18 has projecting blades 21 which interdigitate with blades 22 in its operative position. Bar 19 is movable laterally with respect to 18 to move blades 22 towards the interdigitating blades 21 to clamp the folds of the drapery hung from the bar 86. The pleater bar assembly, counterbalanced by a weight moving in tube 72, is moved vertically by means of crank 25, with wheels on the assembly engaging the edges of bars 11, 12, and is held in required position by a spring ratchet. The blades of the pleater bars 18, 19 have enlarged ends to prevent the drapery from catching, and friction pads to facilitate the clamping effect. The drapery is attached to hooks which run on a rail on bar 86, the hook carriages being shaped to prevent binding on the rail and embracing the latter in such manner that the drapery may be freed from all the hooks by one upward pull. The rear portion of each fold of the folded drapery is attached to a hook on the hanger bar and each fold is placed individually between adjacent blades of bar 19. Bar 18 is then swung down from its inoperative position, see Fig. 3, so that its blade interdigitate with those of bar 19 with the drapery therebetween. The pleater assembly is then lowered slowly to comb out, straighten, and pleat the drapery all the way to its lower end. The assembly may be freely moved up and down to effect pleating. The pleated drapery is then secured by means of encircling bands 164. In order to stretch the drapery it is clamped between bars 18, 19 by moving bar 19 laterally with respect to bar 18 by means of a linkage operated by movement of lever 55, the clamping pressure being controlled by adjustable springs and being constant irrespective of the thickness of the drapery. The pleater assembly may be locked in position by means of a lever 23, not shown, which actuates brakes engaging side channels 11, 12. A foot operated mechanism for releasing the pleater bar assembly which is normally locked is also described. Basket 97 prevents the bottom edges of the drapery from trailing on the floor.
Patent GB-1257152-A (GB)
IPC: B60N2/02
Filed: 1970-01-12
Abstract: 1,257,152. Resiliently mounted seats. ISRINGHAUSEN GEBR. Jan.12, 1970 [June 21, 1969], No. 1348/70. Heading A4U. A vehicle seat, carried by upper and lower frames which have channel members 1, 2 connected at each side of the seat by crossed pivoted levers 3, 4, is resiliently supported by a rubber spring 11 pressed between a plate 12, connected to the lower members 2, and a plate 13, connected to the hinge pins 8 of the levers, and includes two hydraulic dampers one of which (20) is continuously effective and the other, 21, operative when required and is automatically incorporated in the suspension when a certain oscillation amplitude is exceeded. One end of each damper is secured to a cross-bar 10 connecting the levers 4 and movable in the members 2, a pin (19) at the other end of the damper (20) being rotatable in a U-clip 16 secured beneath the plate 12 so that the damper (20) is continuously effective, and a pin 191 at the other end of the damper 21 is guided, during oscillation of the seat, in slots 18 in a U-clip 17, also secured beneath the plate 12, and is locked in the position shown in full lines by a fork 24 operated by a handle 23 to render the damper 21 effective. The fork 24 is biased by a spring 26 to a position in which the damper is ineffective and on rotation of the handle to the full line position, the spring passes through a dead-centre position and urges the fork 24 downwards to press on plastic rollers 27 on the pin 191 and to move automatically into locking position behind the rollers at the first large oscillation of the damper.
Patent GB-1257952-A (GB)
IPC: E04G5/10
Filed: 1969-05-27
Abstract: 1,257,952. Scaffolding. UP-RIGHT Inc. 27 May, 1969, No. 26790/69. Heading E1S. A scaffold including internal ladders and platforms is constructed with platforms, e.g. 72, which extend only partly either across the width (as shown) or along the length (Figs. 4.7, not shown) of the scaffolding from alternate side or end edges, respectively, thereof, and ladders, e.g. 90, which extend up from points, e.g. 96, 98 intermediate the ends of each platform, where they are pivotally attached to braces, e.g. 58, 60, supporting said platforms, to transverse braces, e.g. 48, which are at, or adjacent one end of the framework. Where the gap for the ladder is towards one end of the platform, a movable platform section may fill up the gap when required.
Patent GB-1264903-A (GB)
IPC: H03L7/087
Filed: 1969-07-31
Abstract: 1,264,903. Automatic frequency control. MULLARD Ltd. 31 July, 1969, No. 38503/69. Heading H3A. A frequency synthesizer comprising: (a) a binary counter 20 driven by a clock source; (b) a register 30 for selectively gating output pulses from the counter into one input of an error detecting circuit; (c) a controlled oscillator 2 providing a pulse train nominally at a desired frequency, connected to another input of the error detecting circuit; and  (d) an error control circuit which adjusts the frequency of the controlled oscillator is characterized in that the error detection circuit includes a reversible counter 40, having the gated pulse train from the counter 20 supplied to one input, and the output from the controlled oscillator 2 supplied to the other input, and means for detecting the count reached by the binary counter 20 when an error is detected by the reversible counter. Outputs from binary counter 20 are gated by desired frequency register 30 to provide a signal fd at the desired frequency which is fed to one input of counter 40, which receives a signal f o  from voltagecontrolled oscillator 2 as its other input. If the frequencies of the two signals are not at the same frequency, the counter 40 produces an output signal which stops counter 20. The time taken to detect the error, and hence the count in 20 is inversely proportional to the frequency error and a signal proportional to the frequency error is derived from the counter 20 by detecting the number of zeros leading the count. This signal, and a signal from counter 40 indicative of the sense of the error are fed to units 70, 80, 90 to produce an analogue signal to control the frequency of oscillator 2. A coarse error signal is derived directly from unit 30 via converter 100, and a phase lock error-signal is derived from phase detector 110. Dividers may be included in the output from oscillator 2, Figs. 2a, 2b (not shown). The counter 20 may include binary decades, Fig. 3 (not shown).
Patent GB-1264917-A (GB)
IPC: B65B9/06
Filed: 1970-04-20
Abstract: 1,264,917. Wrapping articles. J. B. DOVE Inc. 20 April, 1970 [12 May, 1969], No. 18717/70. Heading B8C. Apparatus for wrapping articles A in stretchable film F, includes (a) support means 10 for supporting a series of articles partially wrapped in tubular manner with stretchable film, the open ends of which project laterally in both directions beyond opposite sides of the articles, (b) carrier means 74, 76 for transporting the series of partially-wrapped articles in succession along the support means; and (c) a film stretching station, the station including: (c-1) a pair of endless gripper chains 18, 20 disposed in vertical relation, one above the other, at each side of the support means; (c-2) track means for each of the gripper chains maintaining the upper reach of the lower chain in continuous interleaved interlocking pressure engagement with the lower reach of the upper chain; (c-3) means for driving the gripper chains at a speed related to that of the carrier means; (c-4) the gripper chains operating to grip the ends of the projecting portions of the film and to pull the same diagonally downward and forward in substantially vertical planes to progressively stretch the film over the article; (c-5) the portion of the film which is gripped by the chains following a tortuous path through the interleaved interlocking chains, whereby the film ends are pressuregripped tightly by the chains. As shown, the rollers 10 are supported in brackets, the outer leg 41B of each of which carries a ledge for the adjacent projecting end PF of the film. The gripper chains 18, 20, one or both of which may be driven, are spring- loaded into interengaging relationship and pull the film at each side of the article diagonally downwardly in a plane substantially normal to the path of movement of the articles A through the machine, the arrangement being such that when the ends PF of the film enter the nip N between the chains 18, 20 the leg 41B of bracket 41 forces the film from the bottom of the article to follow a path upwardly along the sides of the article, then across the upper edge of the bracket leg 41B arid downwardly to the nip N. The film ends PF engage under an upstanding leg 122 and are subsequently urged progressively inwardly by wedge-shaped supports and folders 22 before the articles are moved on to an endless belt 110 where they are heat-sealed at a station 114 and subsequently cooled at a station 116. The articles are held on their supports by weighted rollers 89. The effective width of the machine is adjustable to deal with articles of different sizes.
Patent GB-1266008-A (GB)
IPC: G06K13/103
Filed: 1969-07-30
Abstract: 1,266,008. Feeding and separating sheets. SPERRY RAND CORP. 30 July, 1969 [2 Aug., 1968], No. 38151/69. Addition to 1,258,961. Heading B8R. The apparatus disclosed in parent Specification is modified by providing a guide channel behind the leading friction roller to allow an additional document to be inserted. Two plates 29, 30, Fig. 1, are disposed so that when a document 31 is inserted into the open end 32 of the guide channel so-formed, it is directed towards the area of contact of leading friction roller 19 with the stack. In operation, when it is required to insert the additional document, the feeding cycle is interrupted until the leading edge of this document is positioned between roller 19 and the stack; the feed signals are then restored. The plates 29, 30 may be formed integrally with a housing (25), Fig. 2, (not shown), of metal or plastics material, which covers the friction rollers 19, 20.