baber/WOPTO huggingface dataset:
Patent GB-1221353-A (GB)
Title: Improvements in or relating to circuit arrangements for multiplicative mixing of electrical signals
Inventor: KREUZER MANFRED
IPC: H03C1/54
Filed: 1968-03-18
Abstract: 1,221,353. FET mixing circuits. FERNSEH G.m.b.H. 18 March, 1968 [16 March, 1967], No. 13035/68. Headings H3T and H4R. [Also in Division G4] A mixer circuit has one signal applied to the source-drain path of a field effect transistor, the source and drain electrodes of which are maintained at an equal potential the signal passed by said path being dependant on the signal voltage applied to the gate of the FET. In Fig. 1 a first signal is applied to terminal 1 and hence via transistor 3 to the source of FET 10. A second signal is applied from terminal 11 to the gate electrode 13 which is tied to earth via resistor 14. The FET acts as a variable resistance, its value depending on the gate potential applied such that the output signal from the collector of transistor 6 or 3, appearing across the load 15 or 15<SP>1</SP> represents the product of the two applied signals. Points 8 and 9 are held at equal potentials in the absence of an input signal. The potential applied to the gate can be obtained from several alternative sources. In Fig. 2 a variable direct voltage applied to gate 13 is used for local or remote gain control. For remote control a lead is attached to the gate 13 and hence to the external control circuits. The input resistance of the FET is very high such that the power consumption of the control circuit is very small. In Figs. 3 and 4 (not shown) the gate potential is tapped from a load in the emitter or collector circuit respectively of transistor 3. The circuit of Fig. 4 can produce a non-linear transmission characteristic and it includes a negative temperature coefficient resistor to off-set the temperature dependance of the FET. Fig. 5 may be used for the compensation of spurious signals appearing in picture signal sources and includes a further transistor 43 to maintain a fixed base potential at transistor 42 by means of clamping pulses. The input picture signal is applied at 40 and the compensating signal of sawtooth or parabolic waveform applied at 50. The first signal, applied to the base of transistor 42, is taken from its emitter to the base of transistor 54. A fraction of the first signal, determined by the setting of potentiometer 55, is applied to the gate electrode of the FET 48 in order to linearize the transmission characteristic for the first signal. The first signal is also applied to the source drain path of FET 48 via transistor 46, and the second signal applied to the gate via transistor 52. The current in the FET is therefore a product of the values of the first and second signals and is represented by the output at 57 in the collector circuit of transistor 46. Diode 58 stabilizes transistor 52 against temperature variations.
Patent GB-132476-A (GB)
IPC: A47G1/06
Abstract: 132,476. Cross, P. May 28, 1919. Picture and like frames.-A fastening-device for the back c comprises a curved metal strip a secured in position by a screw d on the frame engaging a keyhole slot f in the strip a. The fastening allows a back the full size of the frame to be used.
Patent GB-133671-A (GB)
IPC: A01B33/02
Abstract: 133,671. Jackson, B. W. Oct. 5, 1918, [Convention date]. Cultivators. - A rotary tilling-implement comprises a drum 10 provided with detachable tines 11 and carried by links 7 at the rear end of a main frame 1 supported on ground wheels 3. The drum is rotated in the opposite direction to the ground wheels by a chain of gearing extending from the axle of the ground wheels and comprising gear-wheels 22, 13, sprocket-wheels 15, chains 16 and sprocket-wheels 17 mounted on stub shafts 18 which carry pinions meshing with internal gears mounted on the drum. The stub shafts 18 pass through cap plates fitted at the ends of the drum to keep the gears free from dirt. The height of the drum is adjusted by a hand-lever 27 connected to the links 7 by a cable 25. The drum may be in one or more sections.
Patent GB-426524-A (GB)
Title: Bendable tyre valve stem extension member
IPC: B60C29/00
Filed: 1934-05-03
Abstract: 426,524. Tyre valves. WILLIAMS, S. T., 45, Ontario Road, Bellerose, New York, U.S.A. May 3, 1934, No. 13414. [Class 135] A device for actuating a tyre valve which is difficult of access comprises a tube A, e.g. of annealed copper of small diameter and which can be readily bent to a desired form, having secured thereto at one end a sleeve B with flange b and coupling nut C, and at the other end a hollow member D the bore of which is reduced at d to form a shoulder 2d. The outer end of the member is screwthreaded internally at 3d, and externally at 4d to receive a conventional form of inflating chuck. A flange is provided at 5<a> and a clamping nut at E. The end is adapted to be covered by a cap F. Within the tube A is a closely coiled spring carrying at its upper end a flanged pin k and at its lower end a pin G comprising enlarged portions 2<g>, 3<g> and a reduced portion, a head g on which extends to the open end of the member D. The spring K and pin G which, together, form a movable plunger, have a length slightly less than the combined length of nut C, sleeve B, tube A and member D and are loaded by a spring H. The position of the plunger in the tube is determined by a screwed bush J having a screw-driver projection and openings for the passage of air. The nut C is connected to the valve stem and the member D to a convenient point in the wheel disc, the tube A being bent for this purpose if necessary. The pin G is normally clear of the valve pin which may be unseated by pressing on the head g by the conventional inflating or gauging devices.
Patent GB-803172-A (GB)
Title: Purification of phthalonitriles and/or phthalimide
Inventor: GASSON EDWARD JAMES
IPC: C07D209/48
Filed: 1956-05-02
Abstract: Phthalonitriles and phthalimide prepared by the catalysed vapour phase reaction of xylenes with oxygen and ammonia are purified by washing the crude reaction product with water and passing an inert gas or vapour through the mixture at an elevated temperature.  The amount of water used is at least two parts for each part by weight of the reaction product and the purification is carried out at 100-200 DEG  C.  The preferred inert gas is steam but other inert gases such as nitrogen, carbon dioxide, hydrogen or flue gas may be used.  The washing and gassing processes may be carried out together by heating the mixture with water to boiling when the evolved steam (the inert gas) passes through the mixture and carries away the volatile impurities such as tolunitrile.  In this preferred method the distillation is carried out at least until the weight of water distilled over equals the weight of product in the residue.  The purified residue is cooled and washed with cold water.  If the product is contaminated with ammonium carbonate or carbamate the aqueous mixture is first neutralized with acid before it is distilled.  In examples terephthalonitrile, isophthalonitrile and a mixture of phthalonitrile and phthalimide are purified according to this preferred method.
Patent GB-685618-A (GB)
Title: Improvements in or relating to studs for buildings structures
IPC: E04B2/78
Filed: 1949-05-20
Abstract: 685,618. Partitions; studs; securing panels. MARTIN-PARRY CORPORATION. May 20, 1949 [Nov. 29, 1948], No. 13491/49. Classes 20(ii) and 20(iv) A stud to which panels of a partition &c. may be secured comprises a pair of similar sections 10, 11, each comprising a web 14, a half flange 13 and a full flange 12, the two sections being secured together, as by welding 20, 21, to complete an I- section. Each full flange 12 has a pair of parallel ribs 17, 18 provided at intervals with indentations to form local protuberances 19 over which sheet metal edges 24, Fig. 5, of panels 22 may be snapped to secure the panels in position, adjacent panels thus concealing the stud.
Patent GB-205841-A (GB)
Title: Improved bracket for joints
IPC: A47B96/06
Filed: 1923-01-16
Abstract: 205,841. Morse, F. A. V. Jan. 16,1923. Brackets for supporting shelves &c. are made by rolling or bending thin sheet metal into a bar of the section shown, the horizontal limb being of double thickness to receive nails P. The abutting parts may be secured together by soldering, brazing, &c. Specifications 16034/95, 5681/07, and 23142/12 are referred to.
Patent GB-567949-A (GB)
Title: New and improved sign or display device, amusement device or toy
IPC: A63H3/38
Filed: 1943-08-24
Abstract: 567,949. Displaying. CROWTHER, C., WHITELEY, C. W., and BURTON, W. J. Aug. 24, 1943, No. 13779. [Class 3 (i)] [Also in Groups XIV and XV] A facial representation has eye-holes b through which can be seen the pupils d which are located a slight distance behind the plane of the holes, thus imparting to the eyes an appearance of following a passer-by looking at the face. The pupils d may be mounted on a single flat or concave strip c stepped at c<1> for attachment to the rear of the face card a, or a separate strip may be provided for each pupil. A plate of glass &c. may be interposed in the cavity between the strip c and the card a, and when the strip c is concave, the glass may form a sector of a sphere or be concavo-convex. The strip and pupils may be translucent to pass light from the rear.
Patent GB-553953-A (GB)
Title: Improvements in or relating to releasable fasteners
IPC: B64D29/08
Filed: 1941-10-27
Abstract: 553,953. Stud fastenings for cowlings &c. DUNDAS, Ltd., R. K., WOOD, N. F., and KING, R. D. Oct. 27, 1941, No. 13793. [Class 44] In fastenings for aircraft cowlings &c. of the kind having a stud element mounted on one part and engaging with a socket element on the other part, the socket element is mounted with limited lateral play to allow for slight non- registration of the stud with the socket aperture. The stud may also be mounted to allow lateral play in known manner. Figs. 1, 2 show a stud 4 rotatably mounted in an aperture in the cowling 3 and retained by resilient washer 6, the stud having a tapered end leading to screw threads of relatively steep pitch merging into threads 5 of less pitch. The threads engage by snap action with spring tongues 2 forming part of the socket element mounted on an apertured support 1. The tongues are integral with a ring of channel section embracing the edge of the aperture in the support with sufficient clearance, as shown, to allow the requisite lateral play. Flat parts 2a, 7 of the tongues and ring respectively bear against opposite faces of the support. The ring is divided at 8 to allow it to be sprung into place or wormed into place by passing one end through a radial slot 9 extending from the aperture and rotating so that the rest of the ring follows. When home, an upturned part 7b of the trailing end remains engaged in the slot to prevent rotation of the ring in use. Modifications are described in which the spring tongues are riveted or otherwise secured to a separately formed channel ring. The above fastening may be tightened or released by screw action. The application to a fastening in which the stud is tubular with helical slots engaging by rotation with a spring wire diametrically disposed across the support aperture, and to another in which the stud end is inserted between parallel wire springs which snap into slots in the stud, are also described. In these the spring wires are bent to provide portions embracing the edges of the socket aperture and an end of the wire is bent up to engage in a slot similar to slot 9 to anchor the wires against rotation. The marginal portions of the socket aperture may be countersunk or bent to provide a spherical seating for the edge-embracing portions of the socket element. The invention may be used in conjunction with the devices described in Specification 553,956. Reference has been directed by the Comptroller to Specification 548,658.
Patent GB-1029718-A (GB)
Title: Pipe mounting
Inventor: JOYNER VINCENT CHARLES WILLIAM
IPC: E04D13/08
Filed: 1964-04-03
Abstract: 1,029,718. Band clamps. CELANESE BUILDING COMPONENTS Ltd. April 2, 1965 [April 3, 1964], No. 13793/64. Heading E2B. A mounting for attaching pipework to a surface comprises a base 2, an open ended band 5 integral with the base and a separate closing device having near one end two spaced abutments 13, 14 for selectively engaging one end of the band and tightening means at its other end for engaging the other end of the band and adapted to be tightened to a limited extent to clamp the band around a portion of the pipework. As shown, the closing device is a bolt 8 and a nut 12, the tightening of which is limited by a cross-piece 18. The abutments 13, 14 and the cross-piece 18 engage the band with a line contact and the whole mounting is moulded from a plastics material.
Patent GB-544048-A (GB)
Title: Improvements in charge forming devices for internal combustion engines
IPC: F02D9/00
Filed: 1940-09-03
Abstract: 544,048. Spray carburetters. CLEVELAND, F. J. (Bendix Aviation Corporation). Sept. 3, 1940, No. 13806. [Class 7 (iii)] Fuel is supplied by a pump 30 past a suctionactuated regulating-valve 38 to a needle valve 98 in an air conduit 18, the mixture from which is discharged at 20 into a larger conduit 10 and fed to the manifold 16 by a supercharger 14, both of the conduits 10 and 18 being fitted with throttles 22 and 24 respectively, which are connected together so that one closes as the other opens. A cam 106 on the throttle 24 actuates the fuel needle 98 through a lever 102. The valve 38 is controlled by diaphragms 52, 56, the former of which is subjected to fuel pressure at the lower side and to atmosphere by a vent 50 at the upper side, while the latter is also under atmospheric pressure at its upper side by means of a vent 64, but has its lower side influenced by the suction in the air conduit 18 by connections 68, 72; 74. This suction is varied by a valve 96 connected to a barometric capsule 94 in a chamber 82, and also by a valve 86 between the passage 74 and the chamber 82 containing the capsule and vented at 84. The valve 86 is connected to a diaphragm 88 subjected at opposite sides to the pressure in the conduit 10 anterior to the throttle 22, and the pressure in the manifold 16. In practice, the vents 50, 64 and 84 are connected to the inlet of the conduits 10, 18, which may be supplied by a super-charger.
Patent GB-250782-A (GB)
Title: Improvements in weighing machines
IPC: G01G21/08
Filed: 1925-05-27
Abstract: 250,782. Saunders, H. May 27, 1925. Bearings.-In a dead-weight weighing machine the scale plates at the ends of the beam B are prevented from becoming detached by securing a screw or pin A upon the beam end so as to project into a hole D in the bracket E to which the scale plate is attached. The screw or pin may be on the bracket E and the hole in the beam end.
Patent GB-1211795-A (GB)
Title: Process for the production of vulcanisates having high tear-resistance
IPC: C08F8/00
Filed: 1968-03-22
Abstract: 1,211,795. Vulcanizates. CHEMISCHE WERKE HULS A.G. 22 March, 1968 [23 March, 1967], No. 13870/68. Heading C3P. Vulcanizates based on butadiene polymers, containing fillers and having a high tear resistance, are prepared by adding to the butadiene polymer 1 to 30% by weight of a neutralized reaction product of polybutadiene, polyisoprene or a copolymer thereof and an unsaturated mono- or di-carboxylic acid, anhydride or salt thereof, having 3 to 10 carbon atoms, the neutralized reaction product containing one to twenty carboxyl groups for each one hundred chain carbon atoms, and vulcanizing the resultant mixture by a known method. The polymer is preferably a polybutadiene having a cis 1,4 fraction of 30 to 100%. The carboxyl groups are preferably neutralized with a hydroxide, carbonate or oxide of an alkali or alkaline earth metal or the equivalent compounds of zinc or aluminium. In the examples, polybutadiene is carboxylated with maleic anhydride, the carboxyl groups being neutralized with compounds of barium, calcium, magnesium, zinc or aluminium. Carboxylation and neutralization may be carried out in separate steps or as one step. The resultant mixture is vulcanized with carbon black as a filler. The vulcanizate exhibits improved tear resistance.
Patent GB-932824-A (GB)
Title: Improvements in or relating to baling presses
Inventor: PAULIN WILLIAM SPENCER
IPC: B30B9/32
Filed: 1961-04-18
Abstract: 932,824. Baling-presses. DONKIN & CO. Ltd. March 1, 1962 [April 18, 1961], No. 13903/61. Class 94(1). A baling press for scrap material comprises a press box 10 closed by a lid 16 pivoted at 18, the lid having a V-shaped end matching the end wall 13 of the press box. When the box is closed its contents are compressed by a press plate 14 actuated by a first hydraulic ram 15, a second ram 19 serving to raise and lower the lid 16. Upper parts 17 of side walls 12 of the press box and end wall 13 are fitted with a shearing blade 22, co-operating with a blade 23 on the lid. The pivotal mounting of the lid is permitted some movement horizontally to free any scrap jammed between lid 16 and end wall 13.
Patent GB-514561-A (GB)
Title: Improvements in and relating to electric ovens
IPC: F24C7/08
Filed: 1938-05-10
Abstract: 514,561. Electric ovens. GENERAL ELECTRIC CO., Ltd., and ACWORTH, D. G. W. May 10, 1938, No. 13914. [Class 39 (iii)] An electric oven having a movable enamelled metal interior 3 is supported on angle iron strips 2, which are sherardized to provide electricallyconducting, heat resistant, zinc surfaces. The oven compartment 3 is earthed through the strips 2 by means of depressions or welded pins 4 on parts of the casing 3 from which enamel has been removed. The sides 5 of the oven 3 are corrugaated to support shelves.
Patent GB-354359-A (GB)
Title: Improvements in apparatus for generating and burning vaporised liquid fuel
IPC: F23D5/00
Filed: 1930-05-06
Abstract: 354,359. Burners. MAYER, H., 61, Kettenhofweg, Frankfort-on-Main, Germany. May 6, 1930, No. 13930. [Class 75 (i).] Open-tray burners; vaporizing-apparatus.-Liquid fuel is vaporized by dropping on a hot plate 4 formed with air openings 6, 7, 8 and surmounted by a cap 12, the vapour and air mixture being guided by an arched channel 13 in the cap 12 to a mixing chamber 10 to which additional air is supplied through an annular channel 11, a duct 14 and inlets 19, 20, 21 having directing tongues 22. The annular channel 11 is formed between the channel 13 and a wall 17 around the plate 4 and is fitted with baffles sloping downwards to form narrow inlets 16 into the mixing chamber. The wall 17 is formed with an air hole 18 and the combustion chamber with an air inlet 21a. The openings 6 in the plate 4 may be replaced by a single annular slot.
Patent GB-584949-A (GB)
Title: Improvements in or relating to accelerometers
IPC: G01P15/03
Filed: 1944-07-21
Abstract: 584,949. Accelerometers. TARRANT, A. G. July 21, 1944, No. 14005. [Class 106 (iii)] In an accelerometer the acceleration to be measured is applied to a mass 1 through a very stiff spring system comprising a pair of parallel diaphragms 2, 3 completely enclosing a casing cavity 4 containing a viscous liquid for damping. A very small axial movement of the mass 1 is converted into an appreciable rotation of a mirror 14 attached to the middle of a spring strip 10, which has been given a permanent twist, right-handed in one half of its length and left-handed in the other half. The strip is secured to the mass 1 and the casing extension 11 by collets 16 gripping wedges 17 on the strip, and a permanent tension is applied to the strip and the diaphragms by a screwed attachment 12. The mirror may deflect a beam of light on to a photographic film having a chronographic movement.
Patent GB-733690-A (GB)
Title: Improvements in or relating to hand operated knitting machines
IPC: D04B39/00
Filed: 1952-06-04
Abstract: 733,690. Knitting-machines. NEGRI, I., and NEGRI, M. June 4, 1952 [Dec. 22, 1951], No. 14065/52. Class 74 (2). A hand-operated knitting-machine comprises a row of latch needles 25 supported in a bar mounted on the front of the machine and a series of hooks 24 which are projected between the needles to form with the needles a channel in which the yarn is laid from a guide 29 carried by the handle operating the cams effecting movement of the hooks 24. Movement of the handle causes the hooks to be withdrawn after having been projected to draw the yarn about the needles which are then operated and form stitches in the production of fabric.
Patent GB-829004-A (GB)
Title: Improvements in or relating to electric capacitors and their manufacture
Inventor: WALKER HERBERT
IPC: H01G4/38
Filed: 1956-05-07
Abstract: 829,004. Capacitors. BRITISH INSULATED CALLENDER'S CABLES Ltd. May 6, 1957 [May 7, 1956], No. 14105/56. Class 37. A capacitor comprises a group of two or more sealed capacitor units some or all of which are of the same external dimension and contain the same number of elements of the same dimensions as one another but differ as regards their capacity. The variation of capacitance is achieved by the use of a range of differing impregnants, preferably from the range : mineral oil, hydrogenated terphenyl, chlorinated diphenyl or mixture of these substances. In the preferred embodiment units of 3, 4 and 5 kVAr capacity are obtained by impregnating respectively with mineral oil, hydrogenated terphenyl, and chlorinated diphenyl containing 42% chlorine. The Specification includes tables giving combinations of such units to provide aggregate reactive loads varying in steps of 1 kVAr from 6 to 30 kVAr. Housing multiple units.-A number of wound capacitor units 1 are secured side by side to channel members 7 by screws 16 passing into fixing plates 5 welded to the recessed base of each unit. End plates 8 having inwardlyturned flanges on the lower and vertical edges are attached to the end units by screws 16a passing through the channel members 7. Tie rods 18 pass through holes in the end plates 8 and in the terminal chamber 2 of each unit, spacers 22 being provided. Fixing lugs 11 are provided by the channel members 7 projecting through slots 10 in the end plates 8. A gabled cover 9, lifting hooks 13 and a cable entry 14 are also provided. Each unit has a conduit entry hole 6 closed by a knock-out disc. Units are connected in parallel by zig-zag bus-bars 23 to which are attached terminals 24. Specification 829,003 is referred to.