baber/WOPTO huggingface dataset:
Patent GB-941731-A (GB)
Title: Improvements in electrical circuits having non-linear transfer characteristics
Inventor: DENBY PETER
IPC: H04N5/202
Filed: 1959-04-03
Abstract: 941, 731. Electric analogue reaction generators. BRITISH BROADCASTING CORPORATION. June 17,1960 [April 3, 1959], No. 11473/59. Heading G4G. A non-linear circuit for television signals comprises two valves having substantially identical characteristics and cathode loads; a black level clamping circuit connected in the input to the control grid of the first valve; means for biasing the second valve such that the two cathode potentials are the same when the control grid of the first valve is clamped; and a non-linear output circuit connected between the first and second cathodes which includes two series connected resistors, the second of which is shunted by at least one further resistor over a predetermined range of signal levels. The input signal fed to valve VIA is clamped by clamp circuit 12 to the potential determined by the position of the slider on potentiometer RV1, the potentiometer being adjusted to give equal cathode potentials on valves V1A, V1B when the grid of VIA is clamped. The potential at the point E thus corresponds to black level. A third valve V2B has its grid biased to a higher potential than that of V1B, such that the potential Eg at its cathode corresponds to peak white signal, and potentials corresponding to any signal level may be tapped off from RK3. These tapping points are connected to series arrangements of resistors and diodes D1, R3 and D2, R4 which are arranged to shunt a part R2 of the load connected between cathodes, to produce the required non-linear characteristic. The output is fed to a paraphase amplifier V3, V4. A further valve V2A has its cathode connected directly to that of V1A, and has its grid fed with suppression pulses during the line suppression period, the arrangement being such that at other times it is cut off. The pulses appear in the output and may be used as a reference when setting the gain of the amplifier. The non-linear circuit is made as a plug-in unit for ease in changing the characteristic.
Patent GB-610687-A (GB)
Title: Improvements in and relating to lathe chucks
IPC: B23B31/163
Filed: 1946-04-15
Abstract: 610,687. Chucks. ROGERS, G. V. April 15, 1946, No. 11475. [Class 83 (iii)] A chuck of the type divided transversely in a plane perpendicular to its axis into a body section 1, Fig. 1, and a detachable front plate 2 divided radially into identical sectors 6 forming between them jaw-receiving slots 4, has the sectors hardened and ground to precise dimensions. To facilitate accurate assembly, an annular rib 7 provided on the body fits a corresponding groove 8 in the sectors. As applied to a chuck with independently movable jaws, the jaw-actuating screws 21, Fig. 7, are housed in radial recesses in the body and formed with two recesses 24 to receive two sections 25, 26, Fig. 8, of a thrust bearing. Tu prevent fouling of the jaws, the front section is cut away as shown at 30. The sectors of the plate 2 clamp the two sections together in a retaining groove in the wall of the screw recess in the body. In a scroll chuck, chromium plating is applied to the scroll thread which has rounded corners to prevent chipping and to the bearing surface on which the scroll is rotated by a pinion 16.
Patent GB-569737-A (GB)
Title: Improved method of and means for manufacturing articles out of lengths of a strip orband or sheet or plate material by stamping pressing or the like
IPC: B21D35/00
Filed: 1943-07-16
Abstract: 569,737. Punching; shearing. KRETZ, E. July 16, 1943, No. 11588. Convention date, May 28, 1942. [Classes 83 (ii) and 83 (iv)] [Also in Group VIII] A machine for making shoe-lace tags, drawing pins, eyelets, buttons, or,other articles, from strip metal, cardboard, paper, &c. by two or more separate but co-ordinated sets of dies, one set serving to feed the strip and another, fixed horizontally, serving to form separate articles, is characterised by each successive vertical or horizontal movement of both the feeding and holding dies being completed before the next movement starts. The strip M is directed by a spring-pressed roller 31 in between dies 9, 11, the latter being then moved down by a cam 3 on a drive shaft 1 to force pins 13 through the strip. When the downward movement has ceased, a cam 2, on the same shaft 1 causes the set 9, 11 to move to the right. When this movement has ceased, the cam 3 allows springs 17A to move the die 11 up, and when this has ceased the cam 2 allows a spring 15 to move the set 9, 11 to the left, the strip being held by the roller 31. These movements are repeated as long as the shaft is rotated. Each time the die 11 is moved up, a grooved die 24 is moved down by the cam 2 and a lever 6 to out off a perforated length of strip extending beyond a cutting edge 23 and press it on to the ridge of a spring-supported die 29 to form the length cut off into groove form when the die 29 is arrested by the frame 21. The dies 24, 29 remain stationary while the dies 9, 11 move to the left, and are returned to their original position by springs 26, 30 when the die 11 is moving down. More than two sets of dies may be used to act on the strip and may perform any forming, stamping, cutting, &c. operation. Two or more strips may be acted on at the same time by a duplex &c. machine.
Patent GB-1499785-A (GB)
Title: Walking aid
IPC: A61H3/00
Filed: 1976-03-23
Abstract: 1499785 Walking aid D R BARAC 23 March 1976 [2 April 1975] 11628/76 Heading A6M A walking aid for aiding a person to walk along a given path comprises an overhead track 13, a carriage structure 15 coupled to the track for movement there-along and a column 16 depending from the carriage and terminating at its lower end in support means 19 at a selected level above said path. The carriage is supported on the track by roller means drivable via suitable gearing by a first electric motor and the column 16 is telescopic and adjustable for height by a second electric motor via a screw and nut mechanism. Both electric motors can be controlled by the person or an attendant by control means adjacent the support 19. The support 19 may also incorporate a body harness.
Patent GB-1449694-A (GB)
Title: Method and apparatus for casting metal parts under pressure
IPC: B22D18/02
Filed: 1974-03-15
Abstract: 1449694 Casting-machines L H KILLION 15 March 1974 11664/74 Heading B3F In an apparatus for casting metal parts 110 under pressure and comprising a separable die housing 16 containing die halves 42 and 44, the pressure is applied to the metal in the die cavity by a fluid which also cools the die. Each die half is attached to a piston 36 or 38 slidable within the housing 16 and is provided with a chamber 37 or 38 to which a heating or cooling fluid, e.g. steam, fluorinated hydrocarbons 'or liquid oxygen, is supplied. The fluid for the chamber 37 is supplied through passages 62 . and 66 and leaves through passages 96, 94 and 92, that for the chamber 39 is supplied through passages 64 and 68 and leaves through passages 90, 88 and 86. .The die housing 16 is formed in two halves 28 and 30 and is provided with an aperture 74 through which the molten metal passes to the die, an aperture 80 which may be connected to a vacuum source to evacuate the die and an aperture 98 in which a thermocouple may be mounted. After the molten metal has been introduced into the die the flow of fluid through the passages 62 and 64 is increased; this causes pressure to build up in the spaces behind the pistons 36 and 38 which then move inwardly to exert pressure on the metal within the die. After the metal has solidified the die halves 42 and 44, and the housing halves 28 and 30 are separated and the casting pushed out of the die by ejector rods 54 and 56. In addition to -being moved by the pressure exerted by the heating or cooling fluid, the pistons 36 and 38 are also movable by hydraulic cylinders located outside the housing 16. The die may be heated by resistance or induction heating.
Patent GB-812166-A (GB)
Title: Free-flowing rosin materials
IPC: C08K3/34
Filed: 1956-04-17
Abstract: Finely divided natural resins such as gum rosin, wood rosin, tall oil (or sulphate) rosin, and modified (e.g. iodine-disproportionated) rosins are rendered free-flowing after storage at temperatures up to 130 DEG  F. by incorporating therein attapulgite clay.  Examples are given of mixtures containing iodine-disproportionated rosin and attapulgite clay, which are compared with similar mixtures of rosin with bentonite, kaolin, fuller's earth, diatomaceous earth, and talc.
Patent GB-1110816-A (GB)
Title: Improvements in or relating to electric limit switches
Inventor: SCOTT HAROLD RICHARD
IPC: H01H5/14
Filed: 1964-03-19
Abstract: 1,110,816. Retractive switches. HERBERT, B.S.A. ELECTRICS Ltd. 5 March, 1965 [19 March, 1964], No. 11700/64. Heading H1N. In a limit switch with a spring-biased switch operating shaft 13, a bias plate 23 is adjustably clamped in one of three positions to bias the shaft to either end position or to a centre position. Lug 23b on plate 23 is embraced jointly with a lug 29a on shaft 13 by arms 15o, 15b of the bias spring 15, while lug 29a and a lug 22b on a switch-actuating arm 22 are embraced jointly by arms 16a, 16b of a further spring 16, both springs 15, 16, encircling the shaft 13. Bias plate 23 has an aperture 23a for the shaft 13 about which it is turned to its selected position for clamping by a clamping plate 30 and screws 31. In its centre position plate 23 can be moved to disengage lug 23b from spring arms 15a, 15b, by virtue of its elongated aperture 23a, thereby allowing the switch to be employed with no bias. Snapaction of the contact-carrier arm 19 is as in Specification 1,110,817. The replaceable switchactuating unit of the switch is as in Specification 1,110,815.
Patent GB-965387-A (GB)
Title: Methods and apparatus for transporting film strip
IPC: G03D3/13
Filed: 1963-03-25
Abstract: 965, 387. Film processing apparatus. HOUSTON SCHMIDT Ltd. March 25, 1963 [March 27, 1962], No. 11778/63. Heading G2A. Strip material such as a film strip 21 is transported through a compartment 19, Fig. 2, and kept out of contact with the walls thereof by fluid pressure, the fluid being expelled through openings 14 in the side walls of the compartment. In the form shown in Fig. 2, the film strip 21 passes downwards between slotted plates 15, 16. These plates extend between two walls 13 of a housing 10, parallel to the other two walls 12. Thus besides the film-receiving compartment 19 there are also formed two outer compartments 17,18, into which the fluid (e.g. processing liquid) is introduced under pressure. The liquid is forced through the slots 20 in plates 15, 16 to impinge against the film on each side, and so cushions the wet film out of contact with any conveying or guiding means as it is pulled down through compartment 19. Although the slots 20 may be normal to the surface of plates 15, 16 (Fig. 1, not shown) they may also be inclined in the direction of travel of the film, as shown in Fig. 2, so that there is a component of force assisting the movement of the film. The liquid is expelled through a series of apertures 14 in the side walls 13, adjacent the two edges of the film. Fig. 3 shows an apparatus for successive treatment of a film strip, which passes in succession through a developing tank 24, a "stopping" tank 25, fixing tank 26, washing tank 27, and drying chamber 29. The film 21 enters between rollers 31, and is progressed in a sinuous path into and out of each tank in turn by the means described above in connection with Fig. 2. At the upper parts of the film path, as it passes from one tank to the next, it is enclosed in a tank 28, in which the fluid progressing means is air. After leaving the last liquid tank 27, the film passes up into a guide portion 32 conveying it through a housing 29, in which the progressing means is heated air, so drying the film. The whole apparatus may be enclosed in a light-tight housing 35. U.S.A. Specifications 2,008,439, 2,248,056 and 2,651,245 are referred to.
Patent GB-179185-A (GB)
Title: Improvements in or relating to internal-combustion engines
IPC: F02B3/06
Filed: 1922-04-27
Abstract: 179,185. Cruyt, L. April 28, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Regulating. -Water is circulated between the tank 7, Fig. 1, and a tubular boiler 4 surrounding the silencer 3, and thence passes to the induction pipe 10 through the coil 9, in which the steam formed is superheated to a temperature equal to or above the compression temperature of the engine. A valve 12, and valves 13, 14 connected to the carburettor throttle, control the amount of steam produced. The quantity of steam admitted to the cylinder varies in proportion to the charge of mixture drawn through the carburettor.
Patent GB-568445-A (GB)
Title: Improvements relating to fluorescent material
IPC: C09K11/69
Filed: 1943-07-21
Abstract: 568,445. Luminescent materials. ABBEY, A. (American Optical Co.). July 21, 1943, No. 11902. [Class 39 (i)] A material that yields a yellow fluorescence is prepared by heating zinc oxide and vanadium pentoxide, the latter being in proportions of between 5 to 41 per cent by weight of the mixture, to a temperature between 600‹ C. and 900‹ C. The preferable temperature is 780‹ C. The material can also be made by precipitating solutions of zinc salts with ammonium vanadate and heating to the preferred temperature.
Patent GB-128440-A (GB)
Title: Improvements appertaining to the Fuel Supply of Motor Road Vehicles.
Inventor: LONGSDON HENRY CROFTS
IPC: B60K15/00
Filed: 1918-07-22
Abstract: 128,440. Longsdon, H. C. July 22, 1918. Fuel containers.-An auxiliary fuel tank is provided for use when the main supply fails owing to the vehicle being on a gradient. The auxiliary tank 2 is placed in front of the driver and is connected by a pipe 3 to the main supply pipe 4 through a three-way cock 5. The cock is connected by links 8 - - 12 to an operating handle 13.
Patent GB-627842-A (GB)
Title: Kitchen tray
IPC: A47L19/00
Filed: 1946-04-18
Abstract: 627,842. Draining tray. MACINTYRE, W. 'April 18, 1946, No. 12000. [Class 28(ii)] A kitchen tray consists of a perforated plate forming the carrying surface and having integral therewith an upwardlydirected peripheral wall forming a shallow flat receptacle, and integral with the wall outwardly directed flange means for supporting the tray on the top surround of a kitchen sink. A tray A, Figs. 1 and 3, comprises a shallow box 1, the bottom 2 of which is perforated, and which has supporting flanges 4. A cushioning means such as a rubber band 8 is provided around the outside of the wall 3 and under the flanges 4. The flanges 4 have a strengthening rib 7, and their outer edges 4A are turned over and wired. At least one of the flanges has an upwardly-dished portion 5 forming a handgrip with a pair of holes 9 into which pronged ends 10 of a vegetable grater 11 or other kitchen appliance may be removably fitted. The tray may have legs in the form of a closed loop of metal tube at one or both ends and may have a cover 13, Fig. 11, hinged at one end for use as a drip tray. A set of trays A, Fig. 12, of varying depths may be stacked in a rack C.
Patent GB-1469277-A (GB)
Title: Electromechanical filters
IPC: H03H9/52
Filed: 1974-03-19
Abstract: 1469277 Electro-mechanical filters SIEMENS AG 19 March 1974 [3 April 1973] 12060/74 Heading H3U The band-pass filter of Specification 1,424,688, having input, output and intermediate elements, is modified in that, in addition to coupling elements which couple each pair of directlyadjacent resonators, there is provided at least one additional coupling element between one of the intermediate resonators and another one of the resonators which is not directly adjacent thereto. An electrical coupling may also be provided by a capacitor connected between the input and output resonators.
Patent GB-216163-A (GB)
Title: Improvements in motor car and other door locks
IPC: E05C3/16
Filed: 1924-05-19
Abstract: 216,163. Kerby, F. May 17, 1923, [Convention date]. Catches, automatic; striking - plates.-Vehicle and like doors are secured against opening and rattling by the two protruding arms of a U- shaped spring anchored to the base-plate which snap over projections on the striking-plate on the door frame, a wedgeshaped projection on the door edge engaging between the members on the striking-plate. The ends 10, 11 of the limbs 8, 9 of a U-shaped spring 7 anchored to the baseplate 6 at 12 protrude from the edge of the door and are adapted to engage the bevelled parts 23, 24, of the projections 21, 22 on the striking-plate 19 and snap into wedge-shaped recesses 26, 27 to receive the door. The ends 10, 11 are wedge-shaped to fit the recess 26, 27 to prevent loose-fitting and rattling of the door. A wedge-shaped projection 18 on the door edge engages the space between the members 21, 22 to assist in preventing rattling. The spring arms 8, 9 are released for opening the door by turning a cam 15 mounted on a square spindle 16 with an external handle. This cam lifts the ends 10, 11, from the catch members 21, 22 as shown in Fig. 3, and is returned by a spring 25.
Patent GB-697520-A (GB)
Title: Improvement in electrowinning of chromium
IPC: C01G37/00
Filed: 1952-05-15
Abstract: In a process for the electrolytic recovery of chromium from an iron chromium alloy (see Group XXXVI) the alloy is leached at 60 DEG -105 DEG C with dilute sulphuric acid.  The solution after filtration to remove impurities is added under substantially non-oxidizing conditions to an aqueous solution containing an alkali or alkaline earth metal base, e.g. sodium carbonate at a temperature above 60 DEG C until a final pH below 3.8 is reached, thereby forming a granular precipitate of basic chromium sulphate which is filtered off, impurities passing off in the filtrate. The precipitate is washed and dissolved to form the catholyte in the electrolytic stage.  Withdrawn anolyte from the electrolysis containing chromic acid and sulphuric acid may be treated with a reducing agent to reduce chromium to the trivalent form and added to the suphuric acid leaching liquor.
Patent GB-149754-A (GB)
Title: Improvements in cook's dressers, store cupboards and the like
IPC: A47B77/16
Filed: 1919-05-16
Abstract: 149,754. Rodwell, J. May 16, 1919. Cupboads ; kitchen dressers.-A dresser and store cupboard is provided with a set of open - topped containers g, for kitchen and cooking requisites, which are closed by a common lid i adapted to be held open by engaging with spring-controlled levers l. The containers g, drawers f and a flour receptacle s are enclosed by a flap e which serves as a table when turned down and when raised engages the ends of the levers l to release the lid i and allow it to fall on the containers. The lid is secured by a turn-button p which moves a lever q into contact with a pin r on the lid. The flour receptacle is mounted on pivots so that it may be turned out from beneath the drawers f, its lid w being held from opening till this has been done. To facilitate the withdrawal of the receptacle s, its lower pivot t is mounted in a socket u in a hinged member x supported normally by a removable wedge z, a lateral slot in the base y accommodating the pivot as it is drawn out.
Patent GB-586951-A (GB)
Title: Improvements in and relating to the production of crystalline dextrose
IPC: C13K1/10
Filed: 1943-07-29
Abstract: <PICT:0586951/III/1> Crystalline dextrose in "pearl" form is produced by moistening an agitated bed of dextrose seed crystals with a spray of dextrose-containing liquor and thereafter contacting the moistened crystals with a stream of hot air.  Different types of crystalline dextrose are obtained by using different types of seed crystals and by varying the temperatures employed, but it is preferred to produce a product containing 35 per cent. of beta anhydrous crystals. Crystalline dextrose seed crystals are supplied to rotating drum 7 from hopper 10, where they form a bed 13. Dextrose liquor (density 44 DEG -46 DEG  Baum<\>ae) is sprayed on to the bed from header 15, and air at a temperature within the range 300 DEG -350 DEG F. from pipe 9 is passed over it.  The bed is maintained at a temperature within the range 190 DEG -210 DEG F. by means of thermostat 44 which controls the temperature of the heating coil 46 disposed in the air pipe 9. The moistened crystals pass down the drum 7 and are continually raised and dropped by flights 8 as they do so: they are then introduced into rotating drum 16 where they are cooled to about 130 DEG F. by cool filtered air introduced at 17.  The dry crystals are next conveyed to screening device 20 which separates them according to size.  The fraction which is passed by 10-mesh screen 22 but retained by 24-mesh screen 22a is desirable finished product and is conveyed to drum 27, supplied with cool filtered air at 28, where it is cooled to between 70 DEG  and 100 DEG F. before being discharged from the system at 29.  The crystals which are retained on screen 22 are ground in mill 24 and the product is delivered, together with the fine crystals which passed through screen 22a, to hopper 10 to serve as seed in the crystallizing operation.
Patent GB-449048-A (GB)
Title: Improvements in and relating to window stays
IPC: E05C17/30
Filed: 1935-04-25
Abstract: 449,048. Stays. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Naamlooze Vennootschap Ijzerhandel I. M. de Vries; Amsterdam) April 25, 1935, No. 12429. [Class 65 (i)] A window stay comprises a bar 4, Fig. 1, pivoted to the window at 3 and provided with a pin or like projection 5, a tubular member 6, in which the bar 4 is slidable, the member 6 being capable of turning relatively to the pin 5 and provided with notches 7, and a supporting member 13, pivotally mounted on the window sill, and provided with a pin or like projection 14 to engage the notches in the tube 6 which is slidable in the member 13. The tube has a handle 12 by which it is rotated to lock or unlock the stay. In the position shown, the tube 6 and bar 4 are locked together by the pin 5 engaging a peripheral slot in the tube, and the window is held slightly open by one of the notches 7 engaging the pin 14 of the member 13 ; adjustment is effected by turning the tube 6 to bring the notches clear of the pin 14 and sliding the tube through the member 13, the pin 14 moving, along a slot into which all the notches open, to a position for engaging another notch. When it is required to open the window further than the position corresponding to the last notch, the tube is moved so that the pin passes into a slot 10 in the tube, which is thus locked to the member 13 ; the consequent rotation of the tube brings the pin 5 out of the lateral slot into a position to engage the notches 7, thus affording an additional range of adjustment while the bar 4 slides out of the tube 6. For windows opening inwardly, the bar 4 is pivoted to the frame and the member 13 to the sash, and the stay is fully extended in the closed position. The device may be covered by a protective sleeve with a slot for the pivot of the member 13. In a modification, Fig. 7, supplied to a fanlight, the handle 12 is fixed to a tube 21, rotatable but not slidable on the bar 4, provided between the bar 4 and the tube 6, the tube 21 having a slot 25 to receive a pin 24 on the tube 6, and also a lateral slot for the pin 5 (not shown). The member 13 has fixed to it a protective cover 32. During the first part of the opening movement, the tubes 6, 21 and bar 4, locked together, slide through the member 13, and in the later part of the movement the tube 21 is turned to bring the pin 24 into the longitudinal part of the slot 25 so that the handle 12 is still connected to the tube 6 for locking and unlocking the device, while moving with the bar 4 so that it also serves as a handle for opening the window. In the form shown, the end of the bar 4 is bent over and connected to the window by a link 3 which passes below the pivot of the member 13 when the stay is swung down from the normal position shown dotted to the vertical position shown, so that the window is locked in the closed position.