baber/WOPTO huggingface dataset:
Patent GB-168707-A (GB)
Title: Improvements in or relating to electrical switch gear
IPC: H02B13/02
Filed: 1920-06-22
Abstract: 168,707. Coates, W. A., Gittins, G. E., Davies, D. R., and Metropolitan- Vickers Electrical Co., Ltd. June 22, 1920. Electric switches etc.; oil switches; boxes and cases; switches, actuating; switch mechanism interlocking with lids. - Iron-clad switch-gear units comprising a main oil switch and a plurality of isolating switches, are provided with a metal chamber which combines the functions of bus-bar chamber and cable dividing box. Fig. 3 shows the connections of one phase of the switch-gear controlling a threephase electrical system with split-conductor protection. The incoming cable 1, Figs. 1 and 2, passes through the sealing box 4 into the metal chamber 5, which may consist of castmetal sections. Within the chamber 5 are main bus-bars 6 and auxiliary bus-bars 7, consisting of copper-rod conductors in compound filled insulating tubes 8. Copper-rod conductors 9 pass upwards from the chamber 5 through insulating bushings 10, and are secured to the fixed contacts 16 of isolating and selector switches 12, 13, and 14, 15, respectively, which are arranged in oil-filled metal chambers 11. Conductors 30 join some rods 9 to the bus-bars, the ends 3 of the branches 2 of cable 1 being brought direct within the casing 5 to other rods 9. The chamber 5 is filled with insulating compound. The upper isolating switch contacts are connected by similar rods 19 to the series and split conductor transformers 21, 22 arranged in adjacent oil-filled chambers 20; leads 23 pass thence to the stationary contacts of the main oil switch 25, all such interchamber connections passing through insulating bushings 18, 24. The return lead 29 is split in the chamber 20, its two branches leading through selector switches 14 and 15 to the main and auxiliary bus-bars. Selector gear is provided on the main operating shaft 40, consisting of loose striking collars 48 with lateral toothed flanges 49, which co-operate with counterpart teeth 47 on loose bosses 46 at the end of the selector switch-actuating levers. Forks 51 on the lever 52 engage grooves 53 of the striking collars 48, coupling the operating shaft with switches 14 or 15 as the lever 52 is moved by the handle 54 to the left or right. The actuating levers 38, 39 of the isolating and selector switches connect the pivoted switch blades 17 to the common operating shaft 40 either rigidly or through the medium of the selector gear, the necessary rotation of the shaft 40 being provided by a travelling nut and screw 42, 43, operated by an external handle 45. A lever 41 secured to the shaft 40 has its free end bearing in a recess of the travelling-nut 42. Interlocks of known kind are provided between the isolating and main oil switches, and also between them and the lids of the switch and transformer casings, a rod 58 secured to the nut 42 controlling the interlocking mechanism. An oilfilled casing 31 with interlocked lid 57 rests on the casing 20, and carries the potential transformer and fuses 34 separated by an insulating partition 35, leads 32 in an insulating tube 33 supplying the transformer.
Patent GB-227371-A (GB)
Title: Improvements in ploughs
IPC: A01B15/02
Filed: 1924-07-15
Abstract: 227,371. Stewart, W. July 15, 1924.. Tools.-A plough body comprises a head formed with a feather X and a landside W and having a tapering end thickened to provide shoulders, a share formed with a feather S and a landside T respectively bolted to the feather and landside of the head and abutting against the shoulders, and a socketed detachable point V fitting over the end of the head. The head is bolted to the beam at F and landside plates and a mouldboard are bolted to it at G, Q respectively. A small clearance is left between the point V and the share feather S to allow of the taking up of wear.
Patent GB-353443-A (GB)
Title: Improvements relating to slicing machines
IPC: B26D7/32
Filed: 1930-05-29
Abstract: The discharge fly of the slice-stacking mechanism for a slicing-machine is associated with a braking device which comprises a brake-shoe adapted to move along a fixed path under the constraint of a member connecting the shoe to the discharge fly, the arrangement being such that the fly moves into its position of discharge without excessive shock.  The particular embodiment of the invention is as described in Specification 353,442, but in addition it is stated that the brake shoe need not be lined with leather, and it may be acted upon downwardly by a spring or by a weight.
Patent GB-530448-A (GB)
Title: Improvements relating to a method of cracking hydrocarbon oil
IPC: B01J21/12
Filed: 1939-06-10
Abstract: 530,448. Cracking hydrocarbons; catalytic agents. STANDARD OIL DEVELOPMENT CO. June 10, 1939, No. 17061. Convention date, Aug. 31, 1938. Addition to 525,981. [Classes 1 (i) and 32] A catalyst for cracking hydrocarbon oils is obtained by precipitating a solution of aluminium and silicon compounds under such conditions as to produce a plural gelatinous precipitate of silica -alumina, or a heterogeneous mixture of gelatinous precipitate and hydrogel. The product is then impregnated with a solution of an aluminium or silicon compound decomposable by heat into the oxide, e.g. aluminium nitrate or silicon tetrachloride. The impregnated product may be dried at a low temperature and then heated to 800-1000'F. for 2-5 hours. Specification 504,614 is referred to.
Patent GB-166438-A (GB)
Title: Improvements in extincteurs
IPC: A62C13/00
Filed: 1920-06-24
Abstract: 166,438. Clarke, H. June 24, 1920. Extincteurs. - Duplex or multiple discharge pipes c, c<1> extending to the base of the extincteur are connected to a. single outlet c<5>. In order to prevent choking, the inner ends of the pipes c, c<1> may be enclosed in a perforated casing.
Patent GB-774488-A (GB)
Title: Improvements in recording meters
IPC: G01D15/32
Filed: 1955-06-15
Abstract: 774,488. Recording-apparatus. BAILEY METERS & CONTROLS, Ltd. June 15, 1955 [June 16, 1954], No. 17181/55. Class 106 (4). In a recording meter a pivotally supported lift member 8 is positioned to extend between the pen or pens A and the chart 4 and is urged by a spring 21 away from the chart from a normal position in which the member is out of contact with the pen or pens to a supporting position in which the member supports the or each pen with its tip spaced from the chart. An arm 8, Fig. 4, extends between a record disc 4 and a pen or pens A, being pivoted on a shaft 20, bearing in a bracket 22, by means of a plate 8B, gripping its trigger shaped end 8A and being spring-urged to hold the pen A clear of the disc 4 to facilitate changing thereof. When a now disc 4 has been placed on the hub 26, Fig. 5, of magnetic material driven by the shaft 25, an arm 6 is turned about its hinge 102 by means of a handle 5 housing a magnet 28 which is attracted by the hub 26 to clamp the disc 4 thereon. The magnet 28 lies between steel shells 29, 30 the interstices being filled with soft solder 31 with gaps 107 to accommodate pins 27 penetrating the disc 4. A tube 32, whose ends 104, 105 are flanged, passes through the magnet 28 and shells 29, 30 and is fitted rotatably on a non-magnetic spindle 108 having a milled head held in the handle 5 and the tube 32 is held on the spindle 108 by threading a washer thereon and riveting over the end 110. Specification 774,489 is referred to.
Patent GB-563352-A (GB)
Title: Improvements in lighting systems
IPC: F21Y101/00
Filed: 1942-12-03
Abstract: 563,352. Lighting systems. CRADDOCK, C. C. Dec. 3, 1942, No. 17217. [Class 75 (iv)] A lighting system comprises a series of searchlights arranged to throw their beams directly or indirectly on to a reflecting body or bodies supported above the town, playing field, or other area to be illuminated. The reflecting body may be facetted and be surmounted by a horizontal or angled reflector to redirect downwards upward rays. Reference has been directed by the Comptroller to Specification 554,615.
Patent GB-1114525-A (GB)
Title: Improvements in temperature-controlled steam-traps
IPC: F16T1/38
Filed: 1966-04-20
Abstract: 1,114,525. Valves. H. R. GERDTS, and W. F. GERDTS, [trading as GUSTAV F. GERDTS KOMM. GES.]. 20 April, 1966 [21 April, 1965], No. 17237/66. Heading F2V. [Also in Division F4] A steam trap comprises a valve closure member 1 which is controlled by a temperature responsive assembly 5 and has an extension 11 on which a plate 6 is slidably mounted. When the valve opens, the expanding condensate causes plate 6 to move towards an end stop 13 against the action of a spring 12 to cause the valve to open further, the spring 12 ensuring rapid closure of the valve as the pressure drops. To ensure that the plate 6 is more effective at low pressures than at high, the extension 11 may be provided with a bore which is uncovered by the plate after a predetermined movement thereof (Figs. 3 and 4, not shown). The same effect may be achieved either by making the plate of frusto-conical form (Figs. 5 and 6, not shown) or making the walls of the casing surrounding the plate of divergent form so that the greater the axial movement of the plate the greater is the cross-sectional area of the passage between the plate and the surrounding casing. The spring 12 may comprise a bi-metallic assembly (Figs. 7 and 8, not shown) which exerts a greater closing force at high temperatures than at low. Alternatively, the bi-metallic may be arranged to exert a closing force whch decreases on rise in temperature so as to reduce the effectiveness of the plate at high temperatures.
Patent GB-262012-A (GB)
Title: Improvements in and relating to weeders
IPC: A01B1/06
Filed: 1926-07-09
Abstract: 262,012. Hargrove, O. A. July 9, 1926. Branched, multi. ple-support, adjustable handles. - On' the handle 6 of a weeding-tool is mounted an adjust. able sleeve 13 carrying a hand-grip 23 and a reversible member 12 through which the weight of the body may be applied to force the weeding-bar 10 through the soil. The hand-grip 23 is carried by pivoted arms 21, 22 connected together by a shoe 24 shaped to engage the handle 6. When the shoe 24 is parallel with the handle the sleeve 13 may be moved along the handle, but when pressure is put on the hand-grip 23 the shoe binds on the handle and prevents movement of the sleeve.
Patent GB-1474847-A (GB)
Title: Projection lens system
IPC: G02B11/22
Filed: 1975-04-25
Abstract: 1474847 Projection lens systems LINDACO Ltd 25 April 1975 [29 May 1974] 17267/75 Heading G2J In a projection system the lens system comprises a main positive lens, which may be composed of a plurality of elements, and a positive field lens, which may also be composed of a plurality of elements, the field lens being disposed between the object and the main lens, and the main lens having a focal length between 1À2 and 2À5 times the focal length of the system, the system focal length being greater than 400 mm. and having a relative aperture greater than 1:3À5. In a preferred form the main lens is a triplet and the outermost elements have a refractive index less than 1À53, while the central element has a refractive index less than 1À65. In a system of 600 mm. focal length the main lens is conveniently of 900 mm. focal length. The field lens may be of one or two elements, may be a Fresnel lens, and may be of plastics material. It is preferably comparable in size with the object and located mid way between the object and the main lens. It may be axially moveable for focussing. The invention is particularly useful for overhead projectors especially with diffusely radiating objects, e.g. Pictures, T.V. screens etc.
Patent GB-878900-A (GB)
Title: Improvements in mechanisms for the step-by-step feeding of tape or the like
IPC: G11B15/20
Filed: 1959-05-21
Abstract: 878,900. Feeding webs. ATVIDABERGS INIDUSTRIER A.B. May 21, 1959 [May 21, 1958], No. 17335/59. Class 100(1) Tape 6 is fed intermittently by an arm 9 oscillated by a link 11 mounted eccentrically on a shaft 12, the arm having a bent resilient end 14 pressed into engagement with a plate 15 on the lever 9 by a plate 34 mounted on a screw 33 carried by a lever 28. The lever 28 carries a screw supporting a retaining strip 21 which prevents retrograde movement of the tape. In operation, electromagnets 25, 26 are energized alternately to cause the lever 28 to rock to effect clamping of the tape by the end 14 and plate 15 or strip retaining by the strip 21.
Patent GB-946516-A (GB)
Title: Apparatus for indicating and/or controlling the extent to which a rotary member is rotated
Inventor: ALLEN ARTHUR FREDERICK
IPC: G05B19/27
Filed: 1962-05-04
Abstract: 946,516. Lathes. ROLLS-ROYCE Ltd. May 4, 1962, No. 17341/62. Heading B3T. [Also in Division G4] In a lathe control system, Fig. 1, as the cut approaches the desired depth a green light 31 comes on and when the desired depth is reached a red light 30 comes on and at the same time a unit 29 locks the tool carrier against further inward movement as described in Specification 936,716 which is referred to. Overall control is effected by a unit 26 (no details given) which receives signals from a shaft digitizer 24 (see Division G4 and below) indicative of the actual depth of cut and signals from record cards on tape indicative of the desired depth of cut. The shaft position digitizer comprises coarse 57 and fine 56 monophylic scales, Figs. 2 and 3, coupled by continuous gearing to a shaft 23 and is characterised in that transitional errors are reduced by an arrangement whereby the sensing units for the coarse scale are normally clamped to the scale so as to move with it, the clamping only being released, momentarily, each time the fine scale completes a revolution, at which instant the coarse sensing units are retarded with respect to the scale, by one increment of the scale. Thus although the fine and coarse scales are continuously coupled, because of the motion of the coarse sensing units the arrangement is equivalent to an intermittent coupling between the scales. In the particular arrangement described, Fig. 3, photo-electric sensing is used and light transmitted through the coarse scale 57 passes via light guides 73 to fixed cells 75. In operation the member 74, 81 carrying the light guides is normally frictionally clamped to the coarse scale. Each time the fine scale 56 completes a revolution a magnet 46 attached to it passes in close proximity to a second magnet 87. This causes firstly the clamping to be released and secondly, as the fine scale continues to rotate, the retardation of the light guide carrying member 74 by one increment of the coarse scale, this increment being set by stops 93.
Patent GB-146182-A (GB)
Title: Manufacture of tanning agents
IPC: C14C3/20
Filed: 1920-06-25
Abstract: Tanning-agents are prepared by treating acid resin or acid tar from mineral oil refining with sufficient alkali or alkaline earth chromate or bichromate or chromic acid to produce a mixture of oxidized acid resin and chromium salt free from chromate or chromic acid; any free sulphuric acid remaining in the product may be neutralized by alkali or alkaline-earth bases.  Reference has been directed by the Comptroller to Specifications 19502/90 and 17346/99.
Patent GB-1024403-A (GB)
Title: Color glazes and glazing processes
IPC: C04B41/50
Filed: 1964-04-27
Abstract: In order to determine whether a porous ceramic article has been completely coated with glaze, the glaze components are suspended in a liquid to which is added two colouring agents of contrasting colours, one of which is soluble in the liquid and so is absorbed with the liquid into the article, while the other is insoluble and remains on the surface when the liquid is absorbed.  In use, the article when first coated is of one colour but this changes as the soluble colour is absorbed.  Preferably, both colours are destroyed on firing; alternatively, the insoluble colour may be permanent.
Patent GB-1220652-A (GB)
Title: Improvements relating to rotary mowers
Inventor: HARRIS PHILIP GEORGE
IPC: A01D34/63
Filed: 1969-04-02
Abstract: 1,220,652. Mowing machines. HAYTERS Ltd. 16 March, 1970 [2 April, 1969], No. 17412/69. Heading A1F. A rotary grass-cutting machine has a vertical driving shaft 10 with a threaded bore 15 in its lower end. An apertured plate 13 with a mounted sleeve 12 is drivably secured to this shaft and is dished concavely as viewed from the underside. A double-ended cutter blade 17 is stressed against the underside of the plate using a double-shouldered spacing collar 22, a washer 24, and screw 16 which screws into the shaft. The radius of curvature of the blade is slightly greater than the radius of curvature of the plate resulting in a limited frictional surface contact between the two. If the blade meets an obstruction this friction is broken and the blade does not revolve with the plate, thus reducing serious damage.
Patent GB-165427-A (GB)
Title: Improvements in drawing mechanisms for textile rovings
IPC: D01H13/04
Filed: 1921-06-25
Abstract: 165,427. Casablancas, F. June 26, 1920. Rollers and roller heads; combined drawing and twisting arrangements.-The feeding-devices for drawing-mechanism for textile rovings are arranged so as to convey the roving up to a point which is distant from the nip of the drawing-rollers less than the mean length of the fibres and are also rotated to impart or remove twist from the roving. Two drawing-mechanisms may be arranged to treat the fibre successively, the twist being imparted between the drawings. In the arrangement shown in Fig. 2, the feeding devices, which comprise endless belts 31, 32, driven by rollers 25, 26, of which one may be provided with saw teeth, are rotatably mounted in a support 11 on a bar 10 close to the drawing-rollers 8, 9, and an initial drawing is effected by a drawing mechanism of ordinary construction. The feeding-device is mounted on a hoop 19 secured by bayonet pins to a ring 16 rotated by a worm 18, and the rollers are driven to advance the belts by teeth on a funnel-shaped ring 13 rotated by a worm 15. The belts are guided by side-plates 42 and the rollers 25, 26 are pressed by springs 20, 21. The bar 10 is reciprocated in unison with the roving-guide 57. Several arrangements of known kind of feeding-devices are described, comprising a single lower belt with which a spring- pressed roller or plate co-operate; two co-operating belts which may be taut or flexible or may be guided so as to diverge near the nip of the drawing rollers; a single upper belt co-operating with a fixed plate, or with a roller driven at speed equal to or slightly greater than that of the belt, and guided by an external spindle and plate; or two co-operating rollers which may be lightly pressed together, or arranged so as not to touch each other, so that the fibres may slip.
Patent GB-1426917-A (GB)
Title: Storage of nonmineral matter
IPC: A23K10/35
Filed: 1973-04-11
Abstract: 1426917 Preservation GRUMMAN ALLIED INDUSTRIES INC 11 April 1973 [20 April 1972] 17426/73 Heading A2D A method of preserving non-mineral matter in cool, humid air in an enclosed space comprises taking air from and adding air to said space, maintaining the air pressure in the space at 4-200mm Hg (absolute), maintaining the air temperature at -2 to +15C and maintaining the relative humidity at 80 to 100%, the temperature of the water employed to maintain said humidity being maintained sufficiently higher than the temperature in the space to provide a relative humidity in said air of between 80 and 100% and selecting correlated pressures, temperatures and humidity with respect to the matter being preserved. The method is applicable to the treatment of fruit, vegetables, poultry and flowers. The method may be carried out in the apparatus shown in Fig. 1. In this apparatus, material L is stored in an insulated vacuum chamber 10, and a current of air (arrowed) of desired temperature and relative humidity is circulated about the interior of the chamber. Air is continuously evacuated from the chamber by pump P and fresh air enters the chamber by the pipe 16. This fresh air passes through a heat exchanger 20 so as to be cooled to the temperature of the air in chamber 10. A portion of the cooled fresh air passes to air mover 24 which is of the venturi-type and thus air will be sucked from the chamber into the inlet elbow 28. Air is thus drawn into the humidifier 11 and after passing up through the humidifier, this air is passed back into the chamber at outlet 25. A portion of the inlet fresh air, instead of passing to chamber 10, passes through pipe 38 to spray nozzle 35. A spray of water, heated if necessary by heater 61, is thus delivered into the upper regions of humidifier 11.
Patent GB-236598-A (GB)
Title: Improvements in nut locking devices
IPC: F16B39/24
Filed: 1925-07-07
Abstract: 236,598. Thein, A. July 7, 1924, [Convention date]. Locking nuts.-In a nutlocking device of the type comprising a helical split spring annular washer, the upper surface of the ring a is formed by two converging faces and is roof shaped, and engages in a correspondingly shaped annular groove in the bearing face of the nut b. The groove in the nut face is slightly smaller in diameterr than the ring before the nut is screwed down thereon. The lower point of the split portion of the ring may be sharpened to prevent rotation. The Specification as open to inspection under Sect 91 (3) (a) comprises also a modification in which the co-operating faces of the nut and ring are semi-cylindrical. This subject-matter does not appear in the Specification as accepted.
Patent GB-647243-A (GB)
Title: Improvements in or relating to electronic apparatus for detecting or measuring minute mechanical movements and for like purposes
IPC: H01J21/08
Filed: 1946-06-11
Abstract: 647,243. Current and voltage measuring. RADIO CORPORATION OF AMERICA. June 11, 1946, No. 17522. Convention date, June 11, 1945. [Class 37] [Also in Groups XXXIX and XL (a)] Mechanical movements are converted into electric signals in a discharge device having a shutter which variably intercepts an electron beam, so as to vary the proportion of the beam which falls on a secondary-electron - emissive collector. The shutter is a wire 49 in the path of a flat electron beam ; the amplified secondary-electron current from the collector electrode, further amplified if necessary in an electron multiplier, varies steeply with the movement of the wire 49 from its mean position half-intercepting the beam. In this position, output voltage sensitivity may reach 30 volts per 0.001 inch displacement. The movement of the wire is performed by angular displacement about a flexible wall portion 55. One application of the device is to detect the passage of a pulse of micro-waves in a rectangular wave-guide 65, by the mechanical effect of the pulse upon a flexible foil or mesh diaphragm 30 which is connected to wire 49 through link 31 and stiff support 53. The diaphragm 30 may be 1,000 mesh and 0.2 mils. thick and is clamped by two screw rings 67, 69.
Patent GB-997813-A (GB)
Title: Bird-retrieving grapple
IPC: A01M31/00
Filed: 1962-05-07
Abstract: 997,813. Hooks. P. G. BRADLEY. May 7, 1962 [May 24, 1961], No. 17545/62. Heading F2H. A hunter's grapple for retrieving floating birds has a ring of barbed hooks 40 mounted at the wide end of a float 12, i.e. a wooden or a hollow synthetic resin body, which tapers as at 19 to an eye, Fig. 1 (not shown), for securing a line. The hooks are each mounted in a radial notch 26 while a circumferential groove 24 connects the six notches (which are deeper than the groove, as indicated) and contains a snapring 38 which retains the hooks in the notches. The notches each have two parallel walls and two further, intersecting walls and at the intersection of these latter walls there is a slot 30 in which is mounted one end 34 of a leaf spring 32 for holding the hook in the operative position shown in Fig. 3, or in the storage position, Fig. 4.