baber/WOPTO huggingface dataset:
Patent GB-1370798-A (GB)
Title: Roller retraction mechanism in a multiple roller belt assembly
IPC: G03G15/00
Filed: 1971-12-23
Abstract: 1370798 Electro-photographic copiers XEROX CORP 23 Dec 1971 [29 Dec 1970] 59878/71 Heading G2H A roller 21 for guiding an endless photoconductive belt 12 is connected by a yoke 58 to a shaft 61 which is axially movable by buckling linkage 73, 74 to retract roller 21 and allow the belt to be removed and is limitedly rotatable in bearings 62 to enable tracking of the belt. Preferably a spring 64 applies a force to the yoke 58 to tension the belt 12. The Specification also describes a belt tracking system (claimed in application No. 59879/71, Serial No. PENDING) a belt support frame (claimed in application No. 59880/71, Serial No. PENDING), and vacuum hold-down devices for the belt (claimed in application No. 59881/71, Serial No. PENDING).
Patent GB-1482750-A (GB)
Title: Material for shutting down gas cooled nuclear reactors
IPC: G21C9/027
Filed: 1973-12-27
Abstract: 1482750 Shutting down nuclear reactors BRITISH NUCLEAR FUELS Ltd 17 Dec 1974 [27 Dec 1973] 59884/73 Heading G6C Material for introduction into a nuclear reactor core (the reactor is particularly gascooled) to effect shut down in emergency comprises coherent, free-flowable pellets each incorporating a neutron poison and a solid organic substance which changes phase upon attaining a given temperature thereby to result in disintegration of the pellets. The pellets desirably include a substance which will cause the poison to adhere to core surfaces. The poison may be boron, cadmium, gadatinium or their compounds. The propensity of the pellets to flow freely under gravity is increased by including a dense particulate material, e.g. steel filings, therein and by coating the pellets, e.g. by a polyester or polyamide. In any given batch of pellets, pellets of different densities and sizes may be incorporated to give widespread poison dispersal. The substance which changes state may melt; additionally, a substance acting to produce gaseous products which burst the pellets can be included. Certain additives to enhance adherence to reactor core surfaces of the dispersed neutron poison can be included. Various constituents of the pellets and examples of their manufacture are described.
Patent GB-1259839-A (GB)
Title: Apparatus for developing photographic images on sheet-like bases
IPC: G03G15/10
Filed: 1968-12-17
Abstract: 1,259,839. Photographic processing apparatus. OPTO GRAPHICS Inc. Dec.17, 1968 [Dec.20, 1967], No.59944/68. Headings G2A and G2H. Liquid developing apparatus for sheet material 12 e.g. changed exposed electrostatic paper, comprises input and output guide means, as shown roller pairs 14, 16 and 30, 32 respectively; a trough 46 containing e.g. liquid toner, for applying liquid to one face only of the sheet material; damming means, as shown the squeegee roller pair 30, 32, for removing excess liquid developer; a sump 58, wider than the sheet material, for receiving the excess; and recirculating means for directing the liquid developer from the sump 58 to the trough 46. On its downstream side, the trough 46 has a lip 50 so that, as liquid 74 overflows the trough, it cascades on to the surface of the material 12, as at 76. A pump and pipes are provided to recycle the liquid. A squeegee blade 82 is provided to prevent any liquid working back upstream along the material. In another embodiment, Fig. (not shown) separate output means (30b, 32b) and damming means (30a, 32a) are provided, and the liquid distributer comprises an apertured pipe (86). In the embodiment of Fig.6 (not shown), the material (12c) is provided from a supply roll (90). A further modification, Fig. 7 (not shown) the liquid distributer is replaced by a pipe (53d) having a nozzle (96). Two other embodiments, Figs.8, 10 11 (not shown) provide the liquid distributer (44e, 44g) under the material (12, 12g). The arrangement of Fig.9 (not shown) replaces the rollers 30, 32 by a doctor blade (102), output guide means being provided further downstream.
Patent GB-1456400-A (GB)
Title: Transit time tubes
IPC: H01J23/24
Filed: 1973-12-31
Abstract: 1456400 Travelling-wave tubes SIEMENS AG 31 Dec 1973 [4 Jan 1973 5 Oct 1973] 60260/73 Heading H1D Attentuation is produced in a coupled cavity delay line, e.g. for a travelling-wave tube, by providing some of the transverse walls with a grid pattern of raised portions or of pits, over at least a part of their area. The grid pattern itself produces attenuation, but the effect may be increased by accommodating lossy material 12 in the recesses 11 of the grid pattern, and by varying the depth of the grid, or the number or area of the raised portions of the pattern, or the area covered by the pattern, in successive walls along the line. A severed line (Fig. 3, not shown) is disclosed in which the cell length decreases and the grid depth increases progressively in the direction of beam propagation, and reference is made to a non-severed line in which the grid depth, and possibly the cell length, varies symmetrically from the two ends of the line to its centre. The line elements may be manufactured by spark eroding the grid pattern; sanding; painting in the lossy material; and finally sintering.
Patent GB-1330709-A (GB)
Title: Spatial filter
IPC: G02B27/44
Filed: 1970-12-21
Abstract: 1330709 Spatial filtering XEROX CORP 21 Dec 1970 [2 Jan 1970] 60556/70 Heading G2J In an optical read-out system in which a phase object 10 is illuminated by coherent polarised light, the phase object having surface deformations composed of a periodic carrier wave and an amplitude modulating signal containing input information, a spatial filter 40 is located in the back focal plane of lens 35, the filter comprising an opaque mask 41 having two clear apartures 42 centrable about a given diffracted order of the carrier wave frequency, one of the apertures having associated therewith a means 43 for rotating the plane of polarization of light passing that aperture 90 degrees with respect to light passing the other aperture. The means 43 may be a half-wave plate, or a doubly-refractive material, or an optically active material. In a further embodiment the other aperture also has associated therewith a polarization rotator, but so positioned that the two beams are athogonally polarized relative to each other. The rotators may be adjacent the apertures.
Patent GB-1280197-A (GB)
Title: Ship propeller
Inventor: GOTMALM CHRISTER
IPC: B63H1/24
Filed: 1969-12-11
Abstract: 1280197 Marine propellers C GOTMALM 11 Dec 1969 [13 Dec 1968] 60594/69 Heading B7V A propeller for an auxiliary yacht has automatically feathering blades 6 and automatic stop means for preventing feathering when going astern. The blades 6 are rotatably mounted on stub shafts 5 secured to an outer hub portion 4 which is mounted for limited angular movement on an inner hub portion 1 keyed to the propeller shaft. Pin 7 in shot 8 limits the relative movement of hub portions 1 and 4. A cone portion 3 is secured to inner hub portion 1 and carries stop member 10. On rotation of the propeller shaft for forward propulsion, blades 6 rotate about stub shafts 5 until they engage fixed or adjustable stops 9 on outer hub portion 4. On reverse rotation of the propeller shaft for going astern, inner hub portion 1 rotates relative to outer portion 4 moving stops 10 to hold the blades against stops 9. Under sail the water moving past the blades moves them to their feathered position. Stub shafts 5 may be coated with P.T.F.E., and a spring may be used, Figs. 8 and 9 (not shown), to increase the resistance to movement between the inner and outer hub portions, so that the resistance to movement between the blades and their stub shafts is less than that between the hub portions. The pin and slot coupling 7 and 8 may be replaced by a pin in cone portion 3 engaging a slot in hub portion 4, and stops 10 may be replaced by grooves in the periphery of cone portion 3, Figs. 6 and 7 (not shown).
Patent GB-2000778-A (GB)
Title: Preparation of tetramisole intermediate
IPC: C07D233/42
Filed: 1978-07-06
Abstract: <IMAGE> d,1-1-(2-Hydroxyethyl)-4-phenyl-imidazolidine-2-thione, is obtained by reacting d,1- alpha -(2-hydroxyethylaminomethyl)-benzylamine with carbon disulphide and subjecting the resulting d,1-N-[2-(2-hydroxyethylamino)1-phenylethyl]-amide of dithiocarbonic acid to a cyclization process.
Patent GB-2002454-A (GB)
Title: Sliding-vane rotary pumps
IPC: F04C14/06
Filed: 1978-07-21
Abstract: The pump housing has recesses (18, 19) near the inlet apertures (13, 14) wherein quantities of working fluid e.g. oil, are stored for priming purposes. <IMAGE>
Patent GB-2031755-A (GB)
Title: Reflective adhesive tape
IPC: C09J7/29
Filed: 1978-10-16
Abstract: The present invention relates to adhesive tape and to indicators formed thereby, the tape comprising a relatively thick layer (1) of transparent plastics material such as an epoxy or vinyl layer, a reflective layer (2), which may carry a marking such as a series of chevrons or diagonal strips, and a further protective layer (3) which carries a layer (4) of adhesive material. The tape is intended mainly to be applied to road surfaces to replace painted lines and relective means such as "cats-eyes", and should therefore be non-rigid. <IMAGE>
Patent GB-2046465-A (GB)
Title: Optical raster scan generator
IPC: G02B26/12
Filed: 1978-10-19
Abstract: In a raster scan generator for infra- red, visible or ultraviolet radiation employing an afocal telescope, a multi- faceted line-scanning rotor 2 and an oscillating frame mirror 3, the rotor 2 is positioned such that the reflecting facets 8 when subjected to the incident radiation are intermediate between the eye-lens 6 and the exit pupil 7 of the telescope. An optimum position for the rotor can be derived where the rotor dimensions are minimised. The frame mirror is positioned close to the rotor to further reduce the overall dimensions. <IMAGE>
Patent GB-2011096-A (GB)
Title: Method for the crushing test of construction elements and sheets for carrying out the method
IPC: G01N3/04
Filed: 1978-12-21
Abstract: The invention relates to a method for the crushing test of construction elements, and to sheets for carrying out this method, wherein a sheet 14 made of elastic material is interposed between each plate 11, 12 of the press 10 and the element 13 to be tested, with a view to compensating for the surface irregularities of the element. The sheet has, on its face applied against the element, a hardness lower than that of the other face. The invention may be used for testing concrete blocks, bricks and like elements. <IMAGE>
Patent GB-2012984-A (GB)
Title: Optical coupler for fibre optics
IPC: G02B6/28
Filed: 1979-01-19
Abstract: The present invention relates to optical couplers for fiber optics. Prior art couplers have not been capable of selectively making unidirectional, bidirectional or multidirectional couplings, with minimum pulse distortion in a manner limiting loss of light. Additionally, an optical coupler has been needed to make it possible to easily vary the ratio of tapped or added light to transmitted light. The present invention overcomes these deficiencies by providing an optical coupler including fiber optic cable terminating means 18, 22 associated with first and second fiber optic cables and arranged for establishing a first light transmission path between the ends of the first and second fiber optic cables. First 28 and second lenses are provided in the first light transmission path for shaping the light leaving the end of the first fiber optic cable and entering the end of the second fiber optic cable, respectively. A third lens is provided in a second light transmission path for shaping a diverted portion of the light from the first light transmission path entering the end of the third fiber optic cable. The terminating means 38 associated with the third fiber optic cable is arranged relative to a light diverter 40 so that the second light transmission path extends between the light diverter 40 and the end of the third fiber optic cable. The optical coupler can also include optional apparatus for diverting a portion of the light in the second light transmission path, e.g. between third and fourth fibre optic cables, into the first light transmission path. In this case fourth fibre optic cable terminating means 102 is used. <IMAGE>
Patent GB-2041571-A (GB)
Title: Shear detection and compensation circuit for aircraft throttle control system
IPC: G05D1/06
Filed: 1979-02-09
Abstract: A system for processing signals representative of airspeed error and inertial longitudinal acceleration in first and second channels, respectively, and providing cancellation of the turbulence-induced components of the respective signals. Shear detection and compensation circuits are provided in the system for reducing speed wandering in moderate and heavy turbulence. A circuit processing the signal  DELTA Vfrom the shear detector circuit is utilized to provide a gust bias signal input in the system. <IMAGE>
Patent GB-2043316-A (GB)
Title: Rail car retarder
IPC: G01P1/10
Filed: 1979-02-17
Abstract: The retarder includes electronic means for detecting the speed of a rail car passing a sensor and determining car speeds above a predetermined speed. A signal is emitted when a speed in excess of the permitted maximum is detected and serves to actuate an electromagnet which, with the aid of a spring loaded trigger, causes an abutment member to be raised in the path of travel of the car, the abutment member retarding the car. <IMAGE>
Patent GB-2046226-A (GB)
Title: Dispensing of packaged liquids
IPC: B67B7/48
Filed: 1979-03-09
Abstract: Apparatus for dispensing liquid from sealed packages comprises a container 1 for the package having an open top which can be closed by a cover 4 having at least one tube 6, 7 dispensing the liquid or for guiding a dispensing tube or drinking straw. The inner end of the tube is tapered for penetrating a wall of the container during the closing movement. The cover can be hinged to the container Fig. 2 (not shown), or attachable by a screw connection 14, the tube then being carried by a part of the cover which remains stationary with respect to the container. <IMAGE>
Patent GB-2019761-A (GB)
Title: Support Vehicle for Roll Changing
IPC: B21B31/10
Filed: 1979-04-23
Abstract: The vehicle supports a pair of horizontal roll assemblies of a rolling mill while being withdrawn from the mill with their longitudinal axes parallel and horizontal. Roll assemblies con be withdrawn from the mill by sockets, while a workpiece is still present in the wall. The vehicle has upper and lower platforms for carrying the two roll assemblies, and is supported by wheels for lateral movement. <IMAGE>
Patent GB-2030673-A (GB)
Title: Drive system
IPC: F16H1/22
Filed: 1979-06-28
Abstract: 1. A drive system comprises a plurality of rotatable bodies (2, 2') which are drivably associated with rotatable gear wheel means (3, 3') and which are adapted to perform two like working cycles for each rotation. The gear wheel means (3, 3') comprises a gear wheel (3) which in operation causes a characterised rotational error and which is associated with an intermediate gear wheel (4) which in operation causes a rotational error equal in magnitude and opposite in phase to that of the gear wheel (3) to provide rotational error compensation in the drive system. <IMAGE>
Patent GB-2026544-A (GB)
Title: A method of drawing a conductor
IPC: C25F1/04
Filed: 1979-07-11
Abstract: In a method of drawing a conductor 2, the conductor 2 is initially moved through a cleaning bath 3 containing an electrically conductive liquid and a current is passed between the conductor and an electrode e.g. anode 5 immersed in the electrically conductive liquid to electrolytically clean the conductor 2. The conductor 2 is then optionally passed through a water cleaning bath 7 and thereafter is fed to a wire drawing bench 8 to reduce the cross-sectional dimensions of the conductor. Prior to electrolytic cleaning the conductor may be softened by passage therethrough of current via terminal 6. The conductor may be copper or aluminium (alloy) or iron, or metal plated wire. <IMAGE>
Patent GB-2032184-A (GB)
Title: Thermostats
IPC: H01H37/54
Filed: 1979-09-21
Abstract: A thermostat has two switching temperatures and includes two bimetallic discs 8 and 9 each of which is adapted to move a movable contact arm 13 by exerting a force on an interposed force transmitting cylinder 18. Each bimetallic disc is associated with two strip-like fixed terminals 15 and 17 which are slid into a cavity 10 in a resilient plastics body 1 of the thermostat deforming the plastics material against its resilience and thereby retaining them in position. The fixed terminals 15 and 17 and the bimetallic discs 8 and 9 extend parallel to the longitudinal axis of the thermostat. <IMAGE>
Patent GB-2033577-A (GB)
Title: Recovery and identification of microfilariae
IPC: C12Q1/04
Filed: 1979-10-17
Abstract: A method for combined recovery and histochemical identification of microfilariae of Dirofilaria immitis, Dipetalonema reconditum, Dirofilaria repens and certain other filarioid nematodes has particular application in the diagnosis of canine heartworm disease, such disease being produced when dogs are infected by D. immitis. The method involves two stages, in the first of which a sample is initially screened for microfilariae by separation and concentration on a microperforated membrane which is stained with a staining agent that does not exhibit an inhibiting action on reactivity of the enzyme acid phosphase. In the second stage if microfilariae are detected the membrane is contacted by a staining substrate of a type that will react with the enzyme acid phosphatase and, after incubating the membrane, a microexamination is made of the microfilariae for staining of enzyme bodies.
Patent GB-2053584-A (GB)
Title: Electrical contact and method of making same
IPC: H01R4/18
Filed: 1980-04-15
Abstract: A stamped contact (20) has an integral closed crimp barrel (26) of rectangular cross section. The contact has a bent-up portion (40), which acts as a stop for a wire pushed into the bore (34) of the crimp barrel (26). There is also a retention tine (32) for holding the contact in the bore of a connector. The contact is stamped from a sheet (42) having a relatively thick marginal edge (44) which provides the rectangular crimp barrel for the contact. The bore in the barrel is drilled after the stamping operation. <IMAGE>
Patent GB-2054049-A (GB)
Title: Carburettor choke valve actuation
IPC: F02M1/10
Filed: 1980-06-11
Abstract: The opening of the eccentrically mounted choke valve 2 by air flow through the induction passage 1 is opposed by an engine temperature responsive bimetal spring 4 acting via a lever 5 and a spring 15 or a temperature responsive device which biases a lever 16. The lever 16 is engaged by a projection 8 on the lever 5 when the latter has rotated through angle 21. A suction responsive actuator 12 determines the angle 21 and acts on the levers 5 and 16 in opposition to their bias. A cam 20 moves the lever 16 when the throttle valve 3 is opened. <IMAGE>
Patent GB-2055284-A (GB)
Title: Carrier and manoeuvring device for a tool, which device can be mounted on a tractor and is detachable
IPC: B62D49/02
Filed: 1980-07-17
Abstract: A carrier and manoeuvring device for a tool, for mounting on a tractor, comprises a U-shaped frame (5,7,8) detachably mounted on the chassis of the tractor (4), the base (5) of the U-shaped frame being secured to one of the tractor wheels. The base (5) can additionally be supported on the ground by wheels (39). In use, a tool is carried by an articulated post (45, 49) which is rotatably mounted by means of a turntable (42) on the frame. <IMAGE>
Patent GB-2058833-A (GB)
Title: Petroleum fuel
IPC: C10L1/14
Filed: 1980-07-22
Abstract: Petroleum fuel for use in internal combustion engines fitted with a catalytic exhaust gas purification unit contains lead present in the form of an anti-knock agent with from 0.1 to 0.8 theories of 1,2-dichloroethane as scavenger.
Patent GB-2060818-A (GB)
Title: Piston for internal combustion engines
IPC: F16B35/00
Filed: 1980-09-08
Abstract: A piston for an internal combustion engine comprises a piston body (1) and a crown portion (3) that are connected by anchoring means comprising elongate members (7) which are screwed into the crown portion (3) and into the piston body (1) so as to transmit tensile and compressive loads from the crown to a portion of the piston body in a region spaced axially away from the crown portion at a temperature which, at maximum operating temperatures, is low enough to prevent loosening of the anchoring means, the connecting loads not being dependent on any reaction forces between the adjacent faces of the crown portion and piston body. Said anchoring means may comprise at least one member that is inserted into a bore in the piston body and is rigidly connected axially to the crown portion at one end and rigidly axially connected to said portion of the piston body at its other end. Alternatively, said anchoring means may comprise at least one strut member that extends from the crown portion into a bore in the piston body so as to absorb compressive forces therebetween and thereby relieve compressive loading of the adjacent faces of the piston body and crown portion, and at least one tie member that is connected between the piston body and crown portion to restrain separation and that is pre-loaded in tension. <IMAGE>
Patent GB-2065622-A (GB)
Title: Improvements in or relating to application heads for closure applying machines
IPC: B67B3/28
Filed: 1980-11-13
Abstract: An application head for a closure machine comprises a cylinder block 11 in which two pistons 21, 22 are arranged in tandem, a support member 31 suspended from the pistons and mounted for vertical sliding movement in a guideway, a hollow vertical shaft 34 carried in bearings in the support member, and a hollow spindle 42 disposed within shaft 34 and fixed to the support member 31. Shaft 34 has elongate gear teeth 36 enabling it to be driven in rotation and carries at its lower end a rotary headset equipped with forming rollers 39, 40. The spindle carries at its lower end a closure reforming die. Rollers 39, 40 are actuated by respective pistons mounted for radial movement in cylinders 52, compressed air being supplied to the cylinders along the hollow spindle 42. <IMAGE>
Patent GB-2068755-A (GB)
Title: Dart shafts
IPC: F42B6/00
Filed: 1981-02-13
Abstract: A dart shaft has at one end a portion (12) provided with a cruciform slot (13) forming a dart flight holder and at the other end a portion (14) having means, usually a screw thread (15), for connecting it to one end of a dart barrel, the two portions (12 and 14) being interconnected by a central shaft portion (11) of smaller diameter, wherein at least one of the portions (11, 12 or 14) is composed of magnesium or an alloy thereof containing at least 50% magnesium. If the end portions (12 and 14) are formed integrally with the central shaft portion (11), the shaft may be formed by a cold heading or cold forming process, such as rolling, and composed of the same or another metal or alloy. <IMAGE>