baber/WOPTO huggingface dataset:
Patent GB-611945-A (GB)
Title: Improvements in catches for gates and doors
IPC: E05C19/06
Filed: 1946-05-14
Abstract: 611,945. Gate catches. HOWELL, N. G. May 14, 1946, No. 14466. [Class 44] A catch for a gate or door comprises a blade spring s, Fig. 1, one end of which is attached to a bracket b secured to the gate, and a handle h rigidly attached to the blade spring at or near its free end, a forward extension f of the handle engaging a keeper c. The part f is raised for release when the handle h is depressed. In a modification, the forward extension f is comprised by a continuation of the blade spring. The bracket b has a forward extension t forming a stop under the blade spring. In another form, Fig. 3, the blade spring s is attached to a bracket b near the edge of the door, the handle h having a forward extension f lying parallel to it. The bracket may have a rearward extension h forming a downward stop for the handle part.
Patent GB-883470-A (GB)
Title: Improvements in or relating to wheeled trolleys
IPC: B62B1/14
Filed: 1958-05-06
Abstract: 883,470. Hand trucks. ELSAS, T. Aug. 5, 1959 [May 6, 1958], No. 14480/58. Addition to 833,335. Class 108(1). A Wheeled truck has a frame 2 carrying a pivoted rest 9 which locates the leg 7 pivoted at 6 to the crossbar 5. An adjustable handle 12 is releasably held by the screw 14.
Patent GB-924080-A (GB)
Title: Improvements in control arrangements for apparatus having co-acting rolls
Inventor: BRIGGS PETER RICHARD ASHWORTH
IPC: B21B37/66
Filed: 1958-05-06
Abstract: 924,080. Automatic control of rolling mills. DAVY & UNITED INSTRUMENTS Ltd. May 6, 1959 [May 6, 1958], No. 14499/58. Drawings to Specification. Class 38 (4). In a system in which a rolling mill is automatically controlled by a signal dependent on the thickness of the material being rolled to produce material of substantially constant thickness, a circuit is provided for removing from the control signal variations due to roll eccentricity. In one arrangement described, strain gauges responsive to the force between the top chocks or bearings and the thickness adjusting means of mill rolls are arranged in an A.C. bridge circuit the output of which is amplified electronically, rectified, and applied through a condenser so that a D.C. signal proportional to changes of load, e.g. due to imperfections in the rolls, is available for subtraction from an error signal developed in a known type of automatic thickness control system which responds to the separating force and roll setting of the mill and adjusts the separation of the rolls and/or the tension of the material. The D.C. signal is passed through an adjustable limiter circuit so that excessive signals are not developed by corrective adjustments of the rolls. In other arrangements: (a) the strain gauges are arranged in a D.C. bridge circuit ; (b) The D.C. signal dependent on changes of force between the rolls is obtained from a potentiometer or A.C. or D.C. tachometer generator driven by a servomotor responsive to the force between the rolls. Specifications 713,105 and 765,102 are referred to.
Patent GB-416837-A (GB)
Title: Improvements in or relating to electric plug and socket connections
IPC: H01R13/631
Filed: 1934-05-14
Abstract: 416,837. Plug couplings; switchgear structures. ENGLISH ELECTRIC CO., Ltd., 28, Kingsway, London, and HEATH, A. A., Lydstep, Rowley Park, Stafford. May 14, 1934, No. 14512. [Class 38 (i).] A plug having considerable lateral movement for connecting heavy apparatus such as drawout type switchgear, is supported when disengaged from the socket by means of an extension f rigidly attached to the plug d at g and loosely pivoted at h to the support a, to which the plug is conductively connected by flexible conductors e. The extension f is prolonged beyond the pivot h so that, although lateral movement in the recess j is possible, its angular movement is limited. Alternatively, this construction may be applied to the socket.
Patent GB-1381794-A (GB)
Title: Liquid crystal display apparatus
IPC: G02F1/135
Filed: 1972-03-28
Abstract: 1381794 Matrix displays BBC BROWN BOVERI & CO Ltd 28 March 1972 [30 March 1971] 14571/72 Heading G5C Display apparatus comprises a display panel including a liquid crystal layer between crossed conductor arrays E X , E Y , means S X2 , S Y2  for applying across a pair of intersecting conductors an erecting potential U X -U Y  having no component above a threshold frequency at which activation is reduced and means for applying across at least those intersections across which a potential U X  or U Y  occurs a potential having a frequency above the threshold frequency, e.g. 1000-1200 c/s to reduce or suppress activation. The potential to selected electrodes is D.C. or low frequency sinusoidal or square wave A.C. 180 degrees out of phase and is applied via relays or F.E.Ts. In another embodiment, Fig. 4 (not shown), 3-way switches apply either D.C., low and high frequency potentials. The h.f. may be applied only to row or column electrodes. A single A.C. source in a diode-resistor network can be used to produce the D.C. and h.f. potentials. Grey tones may be obtained if the D.C. voltage is varied. A data display/storage device comprises two crossed polarizers 1, 2, glass plates 3, 4 supporting crossed conductor arrays E X , E Y  on either side of a liquid crystal layer LC, another pair of glass plates 5, 10 conductive layers 6, 11, a photoconductive layer 7 of CdS or CdSe, an opaque layer comprising electrodes 8 corresponding to matrix elements and insulating material 9 and a further liquid crystal layer LC<SP>1</SP>. Potentials are applied across electrodes E X , E Y  as above and a D.C. or low frequency A.C. potential B or Q<SP>1</SP>n f  applied between electrodes 6, 11 which only activates the liquid crystal LC<SP>1</SP> when the photoconductor 7 is in its low resistance state.
Patent GB-496142-A (GB)
Title: Improvements in picture projecting devices
IPC: G03B21/26
Filed: 1937-05-27
Abstract: 496,142. Projection and viewing apparatus. STEPHENS, C. L. May 27, 1937, No. 14718. Convention date, June 8, 1936. [Class 97 (i)] Apparatus for projecting or viewing film images comprises an aperture through which the image is projected or viewed, and an operating member associated with film feeding means and with means for closing a circuit including a battery and lamp ; the apparatus may be in the form of a pistol, the operating member being in the form of a trigger. As shown, a casing comprising two members 2, connected by hinges 3, 4 and a spring catch 5, encloses a film guide 6, a holder 13 for a lamp bulb 12, a projection lens 38, and a two-cell battery 19, 20. A trigger 35 is secured to a sliding bar 30 movable in guides 32, against the tension of a spring 33, to engage its insulated spear-shaped end 29 between one terminal 28 of the battery cell 20 and a tongue 26 on a contact strip 14, thus closing the lamp circuit. The bar 30 also carries a spring pawl 41 which engages the film perforations to feed the film 1.0 during the trigger movements, the film being endless and being moved so that a complete picture rests between exposure openings in the end 7 of the guide 6 and a plate 36 while the lamp is lighted. The battery cells are held by a spring clip 21, and are connected in series by a contact plate 22 ; the lamp 12 may have a bulb forming a light condenser.
Patent GB-992069-A (GB)
Title: An incremental electrical method and apparatus for energizing high current superconducting electromagnets
IPC: H01F6/00
Filed: 1963-04-16
Abstract: 992,069. Superconductive circuits. UNITED STATES ATOMIC ENERGY COMMISSION. April 16, 1963 [Oct. 2, 1962], No. 14817/63. Heading H3B. A superconductive electromagnet is incrementally energized to provide an enhanced circulating current by (1) energizing a transformer M while the superconductive magnet coil 9 is short circuited through a switch S-1 and an auxiliary superconductive coil 10 connected in parallel with the switch is open circuited by a switch S-2; (2) inducing a current which circulates through the auxiliary coil L2 by de-energizing the transformer and closing switch S-2; (3) causing the current to circulate through both superconductive coils 9, 10 by opening switch S-1; and (4) repeating the cycle of operation after closing switch S-1 and opening switch S-2 so that a circulating current exists in the superconductive magnet coil L1 alone. The superconductive coils are formed either from cold rolled niobium ribbon masked with insulating tape or from a niobium tube containing a powder of mixed niobium and tin, the tube being insulated by anodising. Boiling liquid helium is used as a coolant. Superconductive switches as described in Specification 985,378 are used.
Patent GB-647571-A (GB)
Title: A lever mechanism for controlling the movement of tools, seeders or other equipment into and out of their operative positions
Inventor: ELLIS EDWARD DARWENT
IPC: A01B63/04
Filed: 1948-06-02
Abstract: 647,571. Agricultural machines. HUMBERSIDE AGRICULTURAL PRODUCTS CO., Ltd. June 2, 1948, No. 14915. [Class 6(i)] A lever system for controlling the movement of assemblies of ground working tools or seeders with respect to the vehicle on which they are mounted has a rocking operating member 21 which is linked to the tools, or seeders. and also to a transverse member 18 which by engaging beneath a part of the assembly holds up any parts which tend to sag when the parts are lifted into the inoperative position. In the construction shown the member 21 is secured to the centre of a long transverse shaft 22 which carries a pair of links 24 which are linked at 15 to a long transverse bar 14. This bar extends between arms 12 at either end of a long transverse shaft 8, and to the bar are connected several arms 11 corresponding one to each of a number of seeders. The arm 11 and a further arm 9 are mounted on shaft 8 and are connected to the seeder as in Specification 644,627. The shaft 22 also carries a pair of arms 25 suitably linked at 19 to arms 16 on the shaft 8, and it is these arms 16 which carry the transverse sag-preventing member 18. This member 18 engages beneath the several arms 9 when the member 21 is moved to raise the seeders. An over-centre spring device may be provided as shown.
Patent GB-593822-A (GB)
Title: Improvements in or relating to de-oxidising or like agents for foundry use
IPC: C21C7/06
Filed: 1945-06-13
Abstract: Deoxidising agents or the like for foundry use are packed in a convenient form for storage and use for granulating the agent, such as phosphor bronze, and mixing it with a binding agent such as silicate of soda.  The mixture in a plastic state is inserted into a metal cylinder such as a copper cylinder which protects the agent, and permits of transport when the mass has dried.  The whole is added to the melt of a furnace, and the casing is chosen to suit the composition of the melt, and the amount of oxidising agent present is predetermined.
Patent GB-1049552-A (GB)
Title: Gasburning installation
IPC: F23D14/60
Filed: 1965-04-08
Abstract: 1,049,552. Burners. DUIKER APPARATENFABRIEK N.V. April 8, 1965 [April 9, 1964], No. 14977/65. Heading F4T. The gas supply to a burner is controlled by a sleeve 8 slidable in the discharge end of the gas supply tube 4 and having axial slits providing variable passages for the gas, and the air supply from a fan is controlled by a butterfly valve 2, the gas sleeve 8 and the butterfly valve being connected for simultaneous operation by an adjustable linkage. The sleeve 8 has a rim adapted to engage the tapered end of the gas supply tube 4 to shut off the gas. The linkage between the sleeve 8 and the butterfly valve comprises a bell-crank lever 19, 20 having a pin 15 and slot connection with an end of a hollow rod 12 extending from the sleeve 8, and a lever 26, Fig. 3, not shown, coupled to the shaft of the butterfly valve and' having a roller 28 urged by a tension spring 40 into contact with a spiral cam 30 on a shaft 23 rotated by a reversible electric motor which receives impulses from a thermostat. The bellcrank lever 19, 20 is also connected to the shaft 23. The air valve 2 can be opened independently of the gas control sleeve by means of an electromagnet 37, Fig. 3, not shown, the armature of which has a pin- 23 and slot connection with the lever 26 coupled to the butterfly valve 2. An automatic control mechanism (not described) starts the fan and simultaneously energizes the electromagnet and at the ignition of a pilot burner 38 de-energizes the electromagnet so that the air valve is then controlled by the cam 30. A tube 16 supplying liquid fuel to an atomizer 17 extends through the hollow rod 12.
Patent GB-713135-A (GB)
Title: Improvements in the manufacture of rock drills
Inventor: HAGLUND DIDRIK WILHELM
IPC: C21D9/22
Filed: 1952-06-13
Abstract: Rock drills in which the crown is not removable from the shaft are made from steel having a normalizing or hardening temperature at least 50 DEG C. below the brazing temperature and, after the cutting tips have been brazed in position and without appreciable loss of brazing temperature at the crown, the shaft is heated to a temperature at least that of normalizing or hardening but below the brazing temperature.  The brazing may be performed in a high frequency unit and immediately on completion of that operation the rest of the shaft may be moved through the unit, at a uniform speed or more slowly at the shank end.  A blast of air may be used to cool the shank end to produce hardening, the remainder of the shaft being cooled in still air.  The normalizing or hardening may be carried out by removing the shaft immediately on completion of brazing to a furnace maintained at the required temperature.  A suitable steel has the following analysis-carbon 0.8-1.10 per cent., chromium 0.5-1.5 per cent., molybdenum up to 0.35 per cent., the balance being iron and unavoidable impurities.
Patent GB-624065-A (GB)
Title: Improvements in domestic fire grates
IPC: F24B1/19
Filed: 1947-06-07
Abstract: 624,065. Domestic fire grates. STEVENSON, T. June 7, 1947, No. 15080. [Class 126] A fret B for a domestic fire grate supported so that it may be raised above the hearth to allow air to pass under it to the fire has secured to its rear side by bolts b a frame A, consisting of two horizontal members a<SP>1</SP>, a<SP>2</SP>, connected together by four transverse members a<SP>4</SP> pivoted to the horizontal members and bent at right angles at their lower ends to form feet a<SP>5</SP>. One end of a lever C is pivotally mounted by means of a spindle c between frame A and fret B the other end being pivoted to the lower horizontal member a2 of the frame. Rotation of the spindle c causes the lever C to give a parallelogram motion to the frame A to raise B off the hearth whilst movement in the reverse direction lowers B on to the hearth. The lever C is provided with a stop c<SP>1</SP> adapted to rest on the lower horizontal member a2 when the fret B is in the raised position with the transverse members a4 vertical.
Patent GB-341826-A (GB)
Title: Process for the manufacture of oxide cathodes for electric discharge tubes
IPC: H01J9/04
Filed: 1930-05-16
Abstract: 341,826. Electrolysis. EGYESœLT IZZËL‡MPA •S VILLAMOSS‡GI R•SZV•NYT‡RSAS‡G, Ujpest, near Budapest. May 16, 1930, No. 15108. Convention date, Dec. 23, 1929. [Class 41.] Oxides of molybdenum and tungsten, depositing.- In the formation of an oxide cathode of an electric discharge device by the deposition of alkaline-earth metal from its vapour upon a metallic core coated with an oxide, which is subsequently heated to effect the oxidation of the deposited metal, such as is described in Specification 313,151, [Class 39 (i), Electric lamps, Arc &c.], a coating of one or more of the oxides of refractory metals, such as tungsten or molybdenum, which cannot be alloyed with the alkaline-earth metal, is electrolytically deposited upon the core from solutions of various tungsten or molybdenum acids or salts, such as the orthotungstates or orthomolybdates, e.g. an aqueous solution of sodium orthomolybdate acidified with hydrochloric or sulphuric acid. The core may consist of tungsten or molybdenum.
Patent GB-529121-A (GB)
Title: Improvements in or relating to dust collectors or separators and the like
IPC: B01D45/14
Filed: 1939-05-22
Abstract: 529,121. Centrifugal dust separators. DAVIDSON & CO., Ltd., and AGAR, A. A. May 22, 1939, Nos. 15192 and 29728. [Class 23] A dust separator 1 of the vortex type has stationary radial vanes 7 in the vortex chamber in proximity to the outlet 3, and a set of pivotally mounted curved vanes 8 adjacent the stationary vanes 7 to regulate the volume of gas passing to the outlet. The separator is of the type described in Specification 223,786, [Class 23], and has a tangential inlet 2 and a peripheral dust outlet 4 connected to a secondary collector 5 the clean gas outlet of which leads to the main purified air current. The curved vanes are connected by crank arms and links to an operating disc by means of which they are all rotated together. A damper 9 at the inlet 2 is carried by arms 10 on pivots 11 so that it can be moved across the inlet by the external handle 12. A supplementary damper plate 13 on a pivot 14 acts in conjunction with the main damper 9. This arrangement permits the effective inlet area and the passages between the vanes 8 to be widened or constricted according to heavy or light loading of the separator. In a modification the inlet passage is subdivided into a number of passages each provided with a pivoted damper 23 at its inner end. The dampers are operated by crank arms 27 having pins 26 working in slots 24 in plates mounted on the sliding actuating bar 25. The pins are only operated by the transverse portions of the slots and these are arranged so that the dampers are operated in sequence. As the load increases the bar 25 is operated to open the damper nearest the outer periphery and the other dampers follow in order. In a further modification the separate dampers' may be replaced by a single plate damper which opens the passages successively.
Patent GB-611980-A (GB)
Title: Sling
IPC: B66C1/12
Filed: 1946-05-20
Abstract: 611,980. Lifting slings; pulley hoists. CALDWELL, L. M. May 20, 1946, No. 15228. [Classes 78 (iv) and 78 (v)] In a lifting sling of the kind in which the load-engaging chain or cable passes round a pulley wheel supported in a frame suspended from a crane hook or hoist, the wheel normally being free to permit adjustment of the cable or chain, but becoming locked automatically when the frame is lifted and the chain or cable tensioned, the frame is provided with spaced side walls having upwardly diverging friction brake surfaces on their inner sides and the pulley wheel is yieldably supported in the frame and provided on its rim with outwardly converging brake surfaces which, when the frame is lifted and the chain or cable tensioned, are moved down into wedging engagement with the braking surfaces on the side walls of the frame. In the embodiment shown in Figs. 1, 2, the frame 7, which is suspended from a crane hook by an eye 5, comprises side plates 8, 9 provided with arcuate brake shoes 12, 13 and secured together at their lower ends by bolts 10 provided with spacers 11. The pulley 14 is supported on an axle 15 which extends through holes in the plates 8, 9 and which is guided for a limited up-and-down movement on bolts 17 which extend through holes in the ends of the axle, the bolts being suspended from bosses 19 integral with the plates 8, 9 and supporting springs 20 on which the ends of the axle 15 rest. When the chain is tensioned by lifting the frame 7, the wheel is depressed against the action of the springs 20 and braking surfaces 28 on its rim are wedged against the surfaces 27 on the shoes 12, 13 so as to lock the wheel against rotation. Spaced recesses 23 are formed in the periphery of the pulley to accommodate alternate chain links 24, the intermediate links 25 bearing on flat portions 26 between these recesses. Fig. 3 shows a modification in which the rim of the pulley 14 is formed with a recess 30 to accommodate four turns of steel cable and the latter is kept spaced the correct distance from the sides of the recess by guide members 31, 32 which are welded to adjacent spacers 11<1>.
Patent GB-1503647-A (GB)
Title: Fluid flow couplings
IPC: F16L37/26
Filed: 1975-05-19
Abstract: 1503647 Pipe joint DOMNICK HUNTER ENGS Ltd 19 May 1975 [6 April 1974] 15363/74 Heading F2G In a quick release fluid coupling, an outlet connecting member 3 is received within a ball member 2 and selectively positionable within a housing 1 between a fluid cut-off position, and a position of fluid communication with an inlet union 5 of the housing. Preferably, member 3 is movable within an arcuate or vee-slot of a housing 1 between a first position (shown) in which it is releasable and in fluid communication with a vent 6 in the housing, and a second position (not shown) wherein it is locked by the abutment of a flange 11 with a shoulder portion of the housing, and is in communication with an inlet union 5 of the housing. A second embodiment (not shown) differs in that the connecting member is lockable in a first position by balls held between retaining rings and engaging an annular recess in the member; the balls being radially movable in a second unlocking position of the member to release said member.
Patent GB-1371730-A (GB)
Title: Firearm having a carrying handle and associated rear sight
IPC: F41G1/08
Filed: 1973-03-30
Abstract: 1371730 Firearm FAIRCHILD INDUSTRIES Inc 30 March 1973 15414/73 Heading F3C A firearm has a receiver 11, Fig. 1, having a barrel 13 connected thereto, a front sight 15 on the barrel 13, and a carrying handle 37, the latter being provided with a rearward portion 39 which connects to the receiver 11 and is provided with an aperture 41 having a rear sight 42 mounted therein, and a forward portion 40 which connects to the receiver 11 and is provided with an aperture 43. The rear sight 42, Fig. 5, has sight holes therein, is L-shaped as shown in Fig. 8 in order to allow for different firing ranges, and has a flat 60 thereon which is engageable by a spring 58. The latter retains the rear sight 42 as shown so as to facilitate sighting by the apertures 41, 43 when the lighting conditions are too bad for the use of the sights 15, 42. The firearm is also provided with a hand grip 17 Fig. 1, a magazine 18, a dust cover 19, a knob 20 of an auxiliary bolt mechanism, a bolt carrier 21, a hammer 22, a hook sear 24, a trigger 26, a control cam 27, a sear 28, and a buffer assembly 34 which is slidably mounted in a receiver extension 35 located inside a buttstock 12, the buffer assembly 34 being urged in a forward direction against the rear end of the bolt carrier 21 by a recoil spring 36. In another embodiment a firearm 61, Fig. 9, has a handle 62 with apertures 63, 64 therein which are located closer to the centre line of the bore of the firearm 61 than the apertures 41, 43, Fig. 1, are to the bore of the firearm 10.
Patent GB-544650-A (GB)
Title: Improvements in or relating to mixing apparatus
IPC: B01F7/08
Filed: 1940-10-18
Abstract: 544,650. Mixing-apparatus. DU PONT DE NEMOURS & CO., E. I. Oct. 18, 1940, No. 15424. Convention date, Oct. 19. 1939. [Class 86] Viscous materials are mixed by a pair of parallel worms rotating in opposite directions and each with half its length of opposite pitch to the other half and to the corresponding half of the other worm. As shown, the starting points 6, 8 of the right halves 2, 4 may be opposite the starting points 5, 7 of the left halves; in another form the starting points 5, 6 and 7, 8 respectively coincide. The ends of the worms may be of zero pitch and provided with grooves &c. to work the material against the ends of the container.