baber/WOPTO huggingface dataset:
Patent GB-403023-A (GB)
Title: Improvements in or relating to toolholders as used by dental surgeons
IPC: A61C1/10
Filed: 1933-06-09
Abstract: 403,023. Dental hand-pieces. PARIS, N., and PECCINI, A., 24, Via del Melo, Perugia, Italy. June 9, 1933, No. 16552. [Class 81 (ii).] A dental handpiece, which may be employed as a straight handpiece or may receive a contraangle head or a grinding wheel attachment, both of which are universally adjustable, comprises a spindle 1 integrally formed at its upper end as a split chuck 19, the conical end of which is engaged by a correspondingly shaped internal flange 18 on a sleeve 12, 13. A helical compression spring 20 surrounding the spindle 1 bears on the lower end of the chuck portion and on a bush 14 screwed in the lower end of the sleeve 12, thus normally causing the chuck to grip a tool shank or other spindle inserted therein. The sleeve 12, 13 may be raised to release the chuck by means of a lever 22 pivoted to the casing 9 and bearing against the bush 14 through a washer 15 and anti-friction balls 16. A flanged bush 2 pinned to the lower end of the spindle 1, runs in a ball bearing within the sleeve 8 at the base of the handpiece. An interchangeable upper casing surrounds the sleeve 11, which is integral with the casing 9, and is held in place by a T-headed spring 27 which is provided with a press button 29 and engages a notched internal flange 35 on the casing. When employed as a straight handpiece a unitary upper casing is used, but when used with an angle head an upper casing 33<1>, Fig. 2, is employed. This carries a spherically hollowed bush 44 within which the hollow spherical member 49 of the angle head is adjustably secured by a threaded sleeve 46. A spindle 42 held in the chuck 19 is provided at its upper end with a fixed cross pin 45 engaging slots 51 in the spindle 50 of the head so as to provide a universal joint. The spindle 50 carries a worm wheel 53 engaging a wheel 54, Fig. 5, which is integral with a hollow spindle 55 within which the shank of a tool may be secured in the usual manner. An emery wheel attachment, Figs. 15 and 16, which may replace the angle head, and is similarly driven and adjustably mounted, comprises a shield 75 and cover 80 both cut away at one side to expose the emery wheel which is held by a screw 68 against the flange 67 of a peg 63 held in the hollow spindle 60. The sleeve 69 of the spherical member 58 is formed with two slots at its upper end to permit the notched pivotal latch 76 to engage between flanges 65, 66 on the peg 63 so as to hold the peg in place. In a modification the sleeve 46 carries a pivotal trough-shaped member which can be swung down to surround the sleeve 33<1>, or swung upwardly so as to project from the handpiece and serve as a lever for tightening or loosening the sleeve 46.
Patent GB-671186-A (GB)
Title: A positive and negative pressure-sensitive valve
IPC: F16K17/04
Filed: 1950-07-03
Abstract: 671,186. Fluid-actuated valves. BUTLER, E. F. July 3, 1950, No. 16581/50. Class 135. A valve permitting the release of liquid from a hydraulic system or the admission of liquid into the system from, e.g. a reservoir, or the venting of air from the system when charging with liquid comprises a body 70 having' connections 71, 72 to the system and the reservoir respectively and coaxial valve members 73, 75. The members 73, 75 are held against their respective seats on the body and the member 73 by springs 74, 76. Excess pressure in the system opens the valve member 73, while excess pressure in the reservoir opens the member 75. In order to vent the system during charging the bolt 78 is screwed inwards to unseat the valve member 75.
Patent GB-1377821-A (GB)
Title: Method and apparatus of perspective transformation in scanned  raster visual display
IPC: G09B9/30
Filed: 1972-04-11
Abstract: 1377821 Simulator display system SINGER CO 11 April 1972 [15 April 1971 23 Dec 1971] 16581/72 Heading H4F  In an aircraft simulator or other type of trainer a simulated scene of the earth's surface as viewed from the observer's viewpoint is produced by raster scanning a spot across a simulated display window, the scanned spot being modulated by a video signal produced by scanning an image source depicting the relevant portion of the earth's surface as viewed from an image viewpoint which is different from the observer's viewpoint, this difference in viewpoints being compensated for by modifying the raster scanning of the image source, i.e. the shape of the image source analyzing raster is modified to give a desired perspective change. Specifically the line of sight from the observer passing through the instantaneous spot position on the display window is used to determine the point of intersection with the earth's surface, and the point on the image source (such as a film) corresponding to this earth intersection point is computed and the analyzing spot appropriately positioned on the image source. The image source may comprise a frame of film, the image picked up by a probe in a camera model system, a displayed digitally generated image, or an orthophoto transparency, which is analyzed by a television camera or flying spot scanner. The display may be produced by one or more C.R.T.'s, television projectors or laser projectors. A detailed description of the analyzing raster computation is given in the Specification.
Patent GB-568749-A (GB)
Title: An improved propeller hub
IPC: B64C11/02
Filed: 1943-10-11
Abstract: 568,749. Making screw propellers. FAIREY AVIATION CO., Ltd. Oct. 11, 1943, No. 16612. Convention date, Nov. 3, 1942. [Class 83 (ii)] [Also in Group XXXIII] The hub of a variable-pitch propeller comprises a cylindrical tubular body 2, the ends of which receive the blade roots, the centre of which has aligned circular openings 36 for the transverse passage of a tubular member 8 receiving the drive shaft, and to which are secured a pair of tangential and oppositely disposed smaller tubular members 10, 12 arranged equidistantly from, and parallel with, the axis of the member 8, the body 2 and the members 10, 12 having communicating oval openings 40, 46 at the points of juncture. For the member 8 a section of tubing is milled and turned to the shape shown in Fig. 15, providing splines 58 for keying to the driving shaft, and a knobbed screw 56 to engage a small notch 38 adjacent one of the openings 36. The body 2 is heated to expand it sufficiently to receive the member 8, and the two parts are welded together. The members 10, 12 are then welded into position and the whole assembly coated with cadmium. The members 8, 10, 12 are closed by screwed caps 18, 14, 16. Specifications 564,221 and 567,961, [both in Group XXXIII], are referred to.
Patent GB-1030460-A (GB)
Title: A circular saw with a vertical tool feed
IPC: B23Q1/01
Filed: 1965-04-20
Abstract: 1,030,460. Sawing. G. WAGNER, and W. HENNING, [trading as GUSTAV WAGNER MASCHINENFABRIK], April 20, 1965 [April 20, 1964], No. 16616/65. Heading B52. A circular saw comprises a tool 3, which is vertically movable in an integral portal-like frame 1 rising above the level of a work-table, the frame having an opening to provide a passage therethrough for a workpiece and a vertical slot in its front face, providing vertical ways for guiding the tool slide 2. A workpiece to be sawn is gripped between the jaws 9, 10 of a vice on the work-table and the tool can be raised and lowered to effect sawing of the workpiece, the tool slide being guided by a face 4, Fig. 2 (not shown), of the slot and adjustable liners 5, 6, 7. A cover plate 8 is secured to the front of the frame and also acts to guide the slide, a recess being formed in the lower part of the cover plate to provide clearance for the bearings of the tool.
Patent GB-1347520-A (GB)
Title: Ergot alkaloid derivatives
IPC: C07D498/14
Filed: 1971-05-24
Abstract: 1347520 Ergot alkaloid derivatives SANDOZ Ltd 24 May 1971 [26 May 1970] 16650/71 Heading C2C Novel compounds I: in which R is 1-4 C alkyl are prepared by reacting an acid addition salt of a compound II: with a reactive functional derivative of a compound III: in which z-x-y is in an inert solvent containing a basic condensation agent. Compounds II in acid addition salt form may be prepared by reaction of compounds IV: with benzyl alcohol to give compounds V: followed by, hydrogenolysis. Compounds IV may be prepared by reaction of compounds VI: with S( + )- methyl - benzyloxy - malonic acid chloride monoethyl ester to give compounds VII: and saponification to the free acid followed by reaction with PCl 5  to give the acid chloride which is then reacted with sodium azide. Pharmaceutical compositions with uterotonic, adrenolytic, antiserotonin, vasoconstrictive, and central circulatory reflex inhibiting effect comprise a compound I together with a suitable carrier or diluent.
Patent GB-542547-A (GB)
Title: Improvements in stylographic pen
IPC: B43K8/18
Filed: 1940-11-19
Abstract: 542,547. Pens. WALLACE, J. Nov. 19, 1940, No. 16653. Convention date, April 4. [Class 146(iii)] In stylographic reservoir pens with a needle 23 carried by a weighted plunger 16, the plunger has circumferentially-spaced elongated ribs fitting freely within the cylindrical bore of the point section 11. As shown, the plunger is hexagonal and has at its front end a reservoir recess with outlet notches 26a The plunger is formed of metal and may have a jacket of rubber or a plastic. The plunger is provided with a rubber or metal tube 25 carrying the needle. The point section has an inturned end flange 15 acting as a stop to the plunger.
Patent GB-809354-A (GB)
Title: Improved height control system for a motor vehicle air spring
IPC: B60G17/015
Filed: 1957-05-27
Abstract: 809,354. Road vehicle spring suspensions. GENERAL MOTORS CORPORATION. May 27, 1957 [June 18, 1956], No. 16717/57. Class 108(2) In a height control system for a motor vehicle air suspension spring comprising a pair of valves which respectively admit air under pressure to and exhaust air from the air spring under the control of a member resiliently connected to a change in angular attitude an over-ride control, responsive to a change in angular altitude of the sprung mass relative to the unsprung mass, renders the member ineffective to control the valves during the period of the change in attitude. Air pressure within air springs 26, 27, Fig. 1, is regulated by control valves 40, 41 operated by levers 42, 43 and links 44, 45. Rear springs 30, 31 are controlled by valves 50, 51. All control valves are similar. Inlet valve 63, Fig. 2, and exhaust valve 64 are operated by lever 70 which pivots about shaft 71. Lever 70 is resiliently connected to arm 74, which is linked to the unsprung mass, through arms 76, 77 of a torsion spring. Oscillations of lever 70 about shaft 71 are damped by damper 90 so that rapid relative movements of the sprung and unsprung masses do not cause the valves to be opened. To prevent lever 70 moving to operate valves 63, 64 during a change of angular attitude of the sprung and unsprung masses which is not damped out by dashpot 90, e.g. when the vehicle is cornering or the brakes are applied, an over-riding control is provided which prevents lever 70 from moving. End 204 of armature 202 engages end 205 of lever 70 and holds it in its mid position when solenoid 200 is energized. This energization occurs when either one or both of mercury switches 210, 215, one of which is mounted transversely and the other longitudinally of the vehicle chassis, is tilted or the mercury is otherwise subjected to a disturbing force. A switch responsive to closure of the ignition switch may be included in the solenoid circuit to permit height correction if the addition of load is such as to cause an angular change of attitude of the chassis while the vehicle is stationary. Specification 786,849 is referred to.
Patent GB-423903-A (GB)
Title: Improvements relating to indirectly heated cathodes for electron discharge tubes
IPC: H01J1/20
Filed: 1934-06-05
Abstract: 423,903. Thermionic cathodes. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. June 5, 1934, No. 16756. Convention date, Sept. 7, 1933. [Class 39 (i)] In an indirectly heated cathode for electron discharge tubes, consisting at least of a heating- member and a carrier body which serves as a support for the electron-emitting layer, the latter is applied in such a manner on to the carrier body 2 that part of the surface of this body remains free and exposed to the surrounding space between the different particles of the electron-emitting compound comprising the layer 4. In the example, the heating member 1 is separated by a layer 3 of insulating-material from a metal tube forming the cathode body 2. Preferably, the electron-emitting material, for example, barium carbonate and strontium carbonate, is sprayed upon the tube 2, using a spraying nozzle of such a size that the distance x between the deposited particles is of the order of 0À05 m.m. As shown, the cathode is surrounded by a grid 5 spaced 0À5 m.m. from it. Specification 413,950 is referred to.
Patent GB-775803-A (GB)
Title: Method and device for the dynamic balancing of movably mounted bodies
Inventor: WILHELMI HEINRICH
IPC: G01M1/22
Filed: 1955-06-10
Abstract: 775,803. Testing dynamic balance. VEB GERATEUND REGLER-WERKE TELTOW. June 10, 1955, No. 16762/55. Class  106(2). The body whose unbalance is to be measured; e.g. a vehicle wheel 7, is mounted on a shaft 3 suspended by a bearing 2 about a point 0 to oscillate with two degrees of freedom, the other end of the shaft 3 being spring-loaded as at 12 and carrying a light source 20 observable on a screen 26 by mirrors 18, 24, 25 once per revolution of the shaft 3 by means of an aperture in a drum 19 rotating with the shaft. The mirror 18 is mounted on a shaft 16 secured in a fixed frame by one universal joint 17 and secured by a second universal joint 15 to a lever 11a which partakes in the oscillations of the shaft 3 so that unbalance of the wheel 7 is depicted on the screen 26 by displacement of the image of the source 20 from a zero position which may be defined in a test run using a wheel of known, or zero, unbalance. The zero position of the image may be adjusted by movement of the mirror 25 by a threaded control lever 27.
Patent GB-1368592-A (GB)
Title: Fluid discharge nozzle
IPC: B05B1/34
Filed: 1973-04-09
Abstract: 1368592 Spray producers BARRY-WEHMILLER CO 9 April 1973 [21 Aug 1972] 16840/73 Heading B2F A nozzle for the delivery of a conical spray comprises an outer hollow body 10, Fig. 5, having a fluid emission orifice 20 at one end, a plurality of raised lands 16, Fig. 2, on the interior surface of the body defining grooves 17 therebetween which are directed generally tangentially toward the orifice 20, a thimbleshaped body 21 disposed within the hollow body, the side wall of the thimble being spaced from the hollow body to form an annular reception chamber 26 for the fluid, and means 15 to retain the thimble in the hollow body. The closed end of the thimble which together with the end wall 18 of the hollow body defines a swirl chamber, is provided with radial vanes 25. A cover 30 is fitted over the open end of the thimble 21, and in an alternative embodiment, Figs. 7 and 8 (not shown), the cover (41) also provides the means to retain the thimble in position in the hollow body. In this latter embodiment the cover is held on the hollow body by means of interengaging slots and lugs (32). In a further alternative embodiment, Fig. 9 (not shown), the hollowbody orifice receives a replaceable nozzle insert (46). Internal circumferential beads or a  set screw 28 of a fluid inlet 13 retain a fluid supply pipe 27 therein.
Patent GB-1385448-A (GB)
Title: Liquid crystal arrangement for the display of digit signs or  symbols
IPC: G02F1/1335
Filed: 1973-05-21
Abstract: 1385448 Modulating light WERK FUR FERNSEHELEKTRONIK VEB 9 April 1973 [13 Oct 1972] 16847/73 Heading H4F An electro-optic display cell comprises a layer 4 of liquid crystal material disposed between a transparent substrate 1 bearing a transparent electrode 3 and a substrate 2 bearing a reflective layer 6, e.g. of aluminium, covered by a transparent electrode layer 7. Layer 6 is thereby prevented from reacting with the liquid crystal material while simultaneously being closely adjacent thereto to reduce parallax. Electrode 3 is shaped, e.g. in a seven segment display, and layers 6 and 7 are shaped to the outer contour of the electrode 3.
Patent GB-427232-A (GB)
Title: Axial locking device, particularly applicable to the wheels of rail vehicles
IPC: B60B37/04
Filed: 1934-06-07
Abstract: 427,232. Shaft collars. VEREINIGTE STAHLWERKE AKT.-GES., 67, Breitestrasse, D³sseldorf, Germany. June 7, 1934, No. 16917. Convention date, July 18, 1933. [Class 80 (ii)] [See also Group XXXIV] In means for securing a railway wheel to its axle by means of a collar engaging a groove near the end of the axle, the collar is formed in two parts 1, 2 which are locked, after assemblage, by a spring-ring 4 engaging registering grooves in the parts 1, 2. Fig. 1 shows a conical tool 5 over which the locking-ring 4 may be expanded for assemblage. The Specification as open to inspection under Sect. 91 describes also the use of set-screws for securing the parts 1, 2. This subject-matter does not appear in the Specification as accepted.
Patent GB-256375-A (GB)
Title: Improvements in apparatus for making wire, hemp or other ropes, cables and the like
IPC: D07B3/04
Filed: 1925-07-02
Abstract: 256,375. Edwards, E., Jones, C., and Hanson, R. July 2, 1925. Machines for making.-In a machine for making ropes, cables &c. the bobbins are mounted axially in a rotating tubular frame comprising two or more longitudinally extending cylindrical segments 1, 2 interconnected by spaced discs 3 welded thereto, the discs 3 having guide-ways 7 adapted to receive the spindles 8 upon which the bobbins are freely mounted. Each spindle 8 is secured within the guide-way 7 by a locking plate 9 actuated by a lever 13 to which is secured a weight 16 which operates centrifugally to maintain the plate 9 in the locked position. To hold the plate in position when the frame 3 is stationary or rotating slowly a hand-operated device is provided, comprising a member 19 slidably mounted by a pin and slot on the lever 13 and having a forked end 23 adapted to engage the cam face of a spring-pressed pin 24 which engages an aperture in the disc 3. The strands issuing from the bobbin are tensioned by providing a brake band .encircling a pulley on the bobbin. To facilitate assembly of the bobbins a loading frame is provided comprising end members connected by a pair of rods upon which the bobbins are placed with the spindles 8 in alignment with the guideways 7. In a modification, Fig. 7, the bobbin spindles 54 are pivotally mounted in cradles 52 so that they can be swung from their normal axial position to enable the bobbins to be placed thereon, each cradle 52 being supported at one end in a bearing 51 offset from a disc 3 and at the other end in a bearing 63 in the adjacent disc, and remaining stationary due to its weight during rotation of the frame 1.
Patent GB-758920-A (GB)
Title: Improvements in and relating to copolymers
Inventor: HANSON NORMAN WILLIAM
IPC: C08F220/12
Filed: 1953-06-19
Abstract: Copolymers of allyl glycidyl ether with at least one acrylate of the general formula CH2=C(R)COOR1, where R is hydrogen or methyl and R1 is an aliphatic or cycloaliphatic radical, contain from 0.1 to 0.5 epoxide rings per molecule of copolymerized acrylic ester and polymerization takes place through the unsaturated bonds of the ether and ester.  The acrylate may be methyl, ethyl, propyl, n-butyl, isobutyl, b -ethoxyethyl, nonyl, lauryl or cyclohexyl acrylate or methacrylate. Copolymerization may be carried out in bulk or in solution in a solvent such as chlorobenzene and the reaction may be accelerated by means of benzoyl or ditertiary butyl peroxide, 2,2-bis - (tertiary butyl peroxy)butane, a ,a 1-azodiisobutyronitrile, oxygen or actinic light.  In examples, the copolymers are prepared by adding the acrylate or methacrylate intermittently to the refluxing ether through which air is bubbled.  The copolymers may be esterified with a drying oil acid such as the acids derived from linseed, dehydrated castor, soya bean, tung, oiticica, perilla, tobacco seed, sunflower or siccative marine animal oil, and the resulting esters may be used for the production of films and coatings.
Patent GB-740259-A (GB)
Title: Improvements in and relating to knitted structures
IPC: D04B21/14
Filed: 1953-06-19
Abstract: 740,259. Knitting. HURD, J. C. H., and ATHANASSOULIS, G. A. Sept. 17, 1954 [June 19, 1953], No. 17027/53. Class 74 (2). A knitted fabric is ornamented by drawing the loops through decorative apertured elements 2 or 11. The elements may be in the form of apertured discs or sequins 2 which are placed over the needles, or they may comprise strips of material 11 which are fed walewise or coursewise to the needles, so that the needles draw loops through the apertures.
Patent GB-472076-A (GB)
Title: Improvements in or relating to conveyors
IPC: A21B3/07
Filed: 1936-06-19
Abstract: 472,076. Conveyers. VICARS, Ltd., T. & T., and NAYLOR, J. F. June 19, 1936, No. 17037. [Class 78 (i)] [Also in Group V] Conveying - apparatus for biscuits and other relatively flat articles comprises upper and lower conveyers clisplaceable in opposite directions and reciprocating fripping means on the upper conveyer for transferring periodically flat articles from it into groups on the lower conveyer. An upper belt conveyer 10 is passed around a fripping knife 11 and rollers 12, 13, of which the roller 12 is fixed relatively to a lever 19, and the roller 13 is fixed relatively to the frame of a lower tray conveyer 27. The lever 19 is pivoted at 20 on the frame of the machine, and is connected by a link 18 to a connecting rod 17 which is pivoted to a block 16. Adjustably mounted within the block 16 are blocks 15 on which the knife 11 is supported.. A pin 22 mounted at one end of a link 23 reciprocated by cam mechanism 24, 25 is secured at various positions in a slot 21 in the lever 19 in order to vary the throw of the latter. In a modification, the articles are transferred by the fripping mechanism to an intermediate band conveyer and pass from it to the tray conveyer. Specification 469,873 is referred to.
Patent GB-831334-A (GB)
Title: Ancillary devices for magnetic workholders
IPC: B23Q3/154
Filed: 1956-06-01
Abstract: 831,334. Magnetic workholders. PANTON, J. R., and WEBB, A., [trading as PANTON & WEBB.]. June 3, 1957 [June 1, 1956], No. 17067 /56. Class 60. A device for use in conjunction with a magnetic workholder and adapted to present an adjustably inclined workholding surface comprises a base member 2, a middle part 18 and an upper member 3. Each is built up from magnetic conductor laminations and non- magnetic laminations arranged alternately. The base member 2 has a concave upper surface 6 formed as part of a cylinder and receiving a convex lower surface 19 on the middle part 18. The latter has a concave upper surface 20 receiving a convex lower surface on the upper member 3, the latter having a flat upper surface on which the workpiece is placed. The magnetic conductor laminations of the middle part may be scolloped on one edge to provide pinnacles 27, the arrangement being such that the pinnacles of one conductor lamination, e.g. 30 of the upper portion of the middle part, contact pinnacles 28 of alternate conductor laminations of the lower portion of the middle part. Mechanical means may be provided for clamping the upper member 3 at the desired angle. The device may be used with a workholder of permanent magnet or electromagnetic type ; the base member may be an integral part of the magnetic workholder.