baber/WOPTO huggingface dataset:
Patent GB-706362-A (GB)
Title: Improvements in or relating to a derrick substructure
IPC: E21B15/00
Filed: 1951-10-18
Abstract: 706,362. Derrick substructures. MOORE CORPORATION, L. C. Oct. 18, 1951 [Oct. 18, 1950], No. 24324/51. Class 78 (4) A part 12 of the deck of a substructure for an oil well derrick is pivoted on a shaft 17 so that it may be turned to the position shown in Fig. 3 to form a ramp up which a drawworks unit C may be skid from the platform 29 of a trailer. The substructure comprises welded skeleton box frames A and B, Fig. 1, each carrying a hinged floor section 5 and shoes 23, 24 for supporting a derrick mast, and joined by removable cross ties 6, 7, Fig. 3, and by a framework 8, Fig. 1, to which are hinged rectangular extensions 9 which rest on the side frames and form with the framework 8 a pipe setback support. A support 11 for a rotary table is secured to the rear of the framework 8 and to the front of the ramp 12 and must be removed before the ramp is tilted. The shaft 17 of the ramp 12 is carried in bearings on the ramp and on beams 19, Fig. 3, incorporated in the side frames. The position of the bearings along the ramp and along the beams 19 may be adjusted so that the ramp is automatically turned on to supporting brackets 13 when the drawworks unit has been hauled a convenient distance up the ramp. The rear of the ramp is supported by a beam 21 guided between verticals 3 incorporated in the side frames and raised by jacks 22. The drawworks unit illustrated comprises a drawworks 26 and engines 27 for driving it and the rotary table and is mounted on a skid 28. The substructure may be moved short distances with the drawworks in place by jacking up the substructure so that a trailer may be backed beneath the ramp 10 after the tie 6 has been removed. For transport over the highway the side frames drawworks unit, ramp and framework are separated.
Patent GB-474315-A (GB)
Title: Improvements relating to speed governing devices for motor vehicles
IPC: B60K31/12
Filed: 1936-09-08
Abstract: 474,315. Automatic control systems. ANDREWS, E. J. Sept. 8, 1936, No. 24452. [Class 38 (iv)] [Also in Group XXVI] Speed governors for motor vehicles comprise a centrifugal governor 3 inserted in a speedometer drive and driven through a clutch that is operated by the driver. The governor actuates a bell crank one arm 7 carrying a rod 9 having a roller 10 engaging a flexible cable 11 connecting the pedal 13 to the throttle valve 16 which is biassed in the opening direction of a spring 18. When the speed rises above a predetermined limit the rod 9 raises the cable to close the valve. Alternatively, the cable may be replaced by a pair of pivoted links. Fig. 3 shows the governor connected to a bell crank 45 to which the valve 16 is also connected. The valve is biassed in its opening direction by a spring 44. The pedal 13 is connected to a lever 47 carrying an abutment 48 engaging an abutment 49 on the bell crank 45. The arrangement permits the bell crank to follow the lever 47 in the opening direction but the governor may close the valve 16 independently of the pedal 13. The centrifugal governor may be replaced by a device comprising an electrical generator connected to a solenoid, arranged; to attract an armature and operate the throttle valve or the generator could actuate a switch connecting the car batteries to a solenoid.
Patent GB-819565-A (GB)
Title: Improvements relating to vane displacement pumps or motors
IPC: F04C11/00
Filed: 1957-08-02
Abstract: 819,565. Rotary engines. PRENDERGAST, C. S. Dec. 30, 1957 [Aug. 2, 1957), No. 24570/57. Class 1.10 (2). Sliding vane pump or motor in which at least one circular rotor 6 carrying a plurality of vanes 16 rotates in an eccentric stator has the vanes arranged in equi-distant pairs, the grooves 15 of each pair being close together and the inner end of each groove connected to the periphery of the rotor by a channel 15A through which fluid enters the grooves beneath the vanes from the pumping chambers as the vanes move outwards under centrifugal force. Preferably the grooves are non-radial and so inclined that the vanes of each pair diverge inwardly from the periphery of the rotor, so that fluid pressure in the grooves always maintains at least two vanes in contact with the bore of the stator between the expansion and compression chambers to provide an efficient seal. The rotor may be used in the pump of Specification 810,556.
Patent GB-224058-A (GB)
Title: Improvements in or relating to electric junction boxes and the like
IPC: H02G3/08
Filed: 1923-10-04
Abstract: 224,058. Ekman, O. Oct. 4, 1923. Bases, boxes, and cases.-In junction boxes of the kind comprising a bowlshaped container and a cover in which the bared conductors are. enclosed by an insulating mass a compound is used which at ordinary temperatures is plastic but not resilient and this is subjected to mechanical pressure either after assembly by using filling means comprising squirts, stauffer cups or the like, or during assembly by filling one of the parts of the box with a quantity of the compound, preferably in excess of the volume of the cavities in the box, and securing the parts together so as to produce a pressure on the filling. Elastic cable inlets or partitions in the box may be employed and such will maintain a pressure after filling. The bowl-shaped portion of the box may form the upper part of a watertight switch fitting. Fig. 1 shows a box of two telescoping parts 1, 2 secured together by screws, the former having apertured rubber diaphragms 4 adapted together to fit the entering cables. This box is filled with the compound, by a squirt 8 for example, until the diaphragms have been pressed out somewhat and some of the filling occupies the inlet sockets 3. The squirt is then replaced by a screw plug. Fig. 3 shows a box the bowl shaped portion 2 of which is filled with compound and then secured over a rubber diaphragm 10 by screws 7. Leads may be taken through sockets 15 of rubber inserted in tubular members in the part 2. These sockets have flanges 16, one of which is adapted to be forced through the tubular member, which fit tightly on the ends of the latter. In another form the leads pass through sleeves 9 of rubber fitted into the ends of similar tubular members and making a watertight fit with the wire. Suitable compounds are (1) equal parts of heavy asphaltic petroleum crude residue and ceresin and (2) petroleum crude residue 2 parts, ceresin one part, and oil, such as heavy petroleum, one part.
Patent GB-449989-A (GB)
Title: Improvements in and relating to valve seat inserts and the recesses to receive the same
IPC: F16K1/42
Filed: 1935-09-04
Abstract: 449,989. Securing valve seats. ANGELL, E. W. C., 6, Mountpleasant Road, Lewisham, London. Sept. 4, 1935, No. 24669. [Classes 83 (ii) and 83 (iv)] [See also Group XXIX] An insert b comprising a valve seat c is secured by expansion in an undercut recess a<1> provided with keyways a<2>. The insert preferably has an inward slope bl before expansion, and either the lower face of the insert, or the bottom of the recess, may be dished (as at b<2>) or grooved or stepped, to prevent spewing of the metal.
Patent GB-704281-A (GB)
Title: Improvements in or relating to electric pulse-generators
IPC: H03K3/53
Filed: 1951-10-23
Abstract: 704,281. Pulse generating circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 23, 1951 [Oct. 26, 1950], No. 24704/51. Class 40 (6) The invention relates to a pulse generator of the type in which an artificial line AL is charged and then discharged rapidly through the primary of a transformer (having an equivalent circuit TR) whose secondary feeds the load RM. According to the invention the ratio between the primary leakage inductance LL and effective input capacitance CP of the transformer is greater than the square of the surge impedance of each section LS, CS of the line and the leakage inductance is greater than the series inductance LS of each line section and is arranged as a series element of a final section which constitutes an extension of the line. The large value of leakage inductance permits the spacing of the primary from the secondary to be large and thus reduces the effective capacitance across the primary.
Patent GB-463237-A (GB)
Title: Improvements relating to arrangements for flexibly connecting together parts of electric discharge apparatus, especially parts of metal vapour rectifiers
IPC: H01J13/22
Filed: 1936-09-11
Abstract: 463,237. Resilient supports. SIEMENSSCHUCKERTWERKE AKT.-GES. Sept. 11, 1936, No. 24838. Convention date, Dec. 7, 1935. [Class 108 (iii)] Parts of electric discharge apparatus, particularly parts of metal vapour rectifiers such as anode grids, electrodes, protecting tubes, cooling insets, and the current rectifier vessels themselves, are flexibly connected together by forming the parts with oppositely-facing recesses 6, 7 between which a spiral coil or coils 4, 5 of wire are inserted under pressure, the shape of the recesses causing deformation of the coil or coils which are thus held in position. The coils when deformed may be of elliptical cross-section with the major axis horizontal, as shown, or vertical.
Patent GB-670805-A (GB)
Title: Electric plug and switch-socket
IPC: H01R13/648
Filed: 1949-09-28
Abstract: 670,805. Two-part couplings combined with switches. McGEOCH & CO., Ltd., W., and WATT, H. S. Oct. 23, 1950 [Sept. 28, 1949], No. 24891/49. Class 38 (i). [Also in Group XXXVII] A plug and switch-socket comprises a casing 1 containing fixed contacts 2 engageable by rectilinearly movable contacts 4 normally held by springs 7 away from the fixed contacts. A plug connected by a cable to currentconsuming apparatus is insertable through an aperture in the casing to force the movable and fixed contacts into engagement and at the same time become connected to the movable contacts. A detent 14, spring-urged into engagement with the plug, holds the latter in the casing. In the embodiment shown, the fixed and movable contacts are carried by bars 3, 5 respectively, the latter one sliding on rods 6 and carrying a pin 8 adapted to be engaged and depressed by the plug on its insertion and also serve as an earth connection to the plug. Contacts 11 on the plug engage contacts 10 carried by a fixed bar 9 and permanently connected to the movable switch contacts 4. Detent 14 is carried by the lid 15 of the casing and has a handle 17 on its outer end, its inner end engaging a tooth 13 on the plug. On withdrawal of the detent from engagement with the plug, the springs 7 produce a rapid break between the contacts 2, 4 and at the same time eject the plug from the casing. Additional plug-retaining means may be provided comprising a threaded boss 18 on the casing engageable by a threaded ring 19 captive on the plug.
Patent GB-1103126-A (GB)
Title: Process and copying material for the preparation of positive images
IPC: G03C5/58
Filed: 1966-06-03
Abstract: 1,103,126. Photographic process. KALLE A.G. June 3, 1966 [June 4, 1965], No.24922/66. Heading G2C. Photographic positive images are prepared by imagewise exposing a supported light-sensitive layer containing a metallocene and an organic halogen compound which splits off halogen when exposed to light, and developing the image formed with an aqueous solution of a noble metal salt. The metallocene is preferably ferrocene, but nickelocene and cobaltocene may also be used. The halogen compound is preferably of the formula RR 1 R 2 CX where X is Cl, Br or I, and R, R 1 , and R 2  are each Cl, Br, I, H, alkyl, haloalkyl, aryl, aralkyl, alkenyl or a heterocyclic group. The metallocene and halogen compound are preferably applied to support in the form of a solution, the support being preferably pre-coated with an aqueous dispersion of casein, starch, gelatine, carboxymethyl cellulose or polyvinylacetate which may contain SiO 2 , TiO 2  or BaSO 4 . The development is preferably effected with a 1-40% by weight solution of a silver salt e. g. silver nitrate; in an embodiment a more dilute solution is applied for a short time to produce silver nuclei on the image which are then developed physically (e. g. using an aqueous solution of (NH 4 ) Fe (SO 4 ) 2 , Fe (NO 3 ) 3 , AgNO 3 , citric acid and a surfactant).
Patent GB-744648-A (GB)
Title: Line structure elimination in cathode ray tubes
IPC: H01J29/24
Filed: 1953-09-09
Abstract: 744,648. Cathode-ray tubes. RADIO CORPORATION OF AMERICA. Sept. 9, 1953 [Sept. 19, 1952], No. 24994/53. Drawings to Specification. Class 39 (1). [Also in Group XL (b)] A device for eliminating line structure of a cathode-ray tube raster comprises a screen disposed in front of the tube having a plurality of cylindrical lenses with their axes parallel to the direction of scanning which magnify each line in a direction normal to the scanning direction. The screen may be a transparent plastic sheet or may be glass and integral with the face of the cathode-ray tube. The number of lenses lies between 50 and 200 per inch and the radius of curvature of the lenses preferably lies between 0.06 inch and 0.009 inch, the preferred construction having about three lenses per scanning line. The glass face of the tube may be etched with acid to form cylindrical grooves, suitable orientation being ensured by vibrating the tube or the acid in one direction only, the grooves being satisfactory provided their length exceeds “ inch.
Patent GB-842234-A (GB)
Title: Loud-speaker systems
IPC: H04R1/40
Filed: 1958-08-05
Abstract: 842,234. Loud-speaker systems. WENTE, E. C. Aug. 5, 1958 [Aug. 26, 1957], No. 25056/58. Drawings to Specification. Class 40 (4). In a loud-speaker system, three similar loudspeakers are mounted symmetrically in the trihedral corner of a room so that the axes of their diaphragms pass through the vertex of the trihedral corner, from which point the diaphragms are equidistant.
Patent GB-1433252-A (GB)
Title: Apparatus for extending gate roadways to advancing faces in  underground mines
IPC: E21D9/10
Filed: 1973-05-25
Abstract: 1433252 Longwall, mineral-mining installation COAL INDUSTRY (PATENTS) Ltd 14 May 1974 [25 May 1973] 25116/73 Addition to 1298590 Heading E1F The gate roadway forming apparatus of Specification 1298590 is modified in that broken out rock falling into the shield 32 of the apparatus is moved across the shield 32 by a pusher member 37 mounted on the cutter-carrying boom of the apparatus onto a conveyer 34 that carries the rock rearwards from the shield. Preferably the rock drops down through an aperture 35 in the shield onto a conveyer located on the longitudinal axis of the apparatus and is conveyed to a hopper 36 at the rear of the apparatus, the hopper being associated with pack forming equipment.
Patent GB-462545-A (GB)
Title: Improvements in and relating to electric discharge lamps
IPC: H01J61/073
Filed: 1935-09-10
Abstract: 462,545. Discharge lamps. BRITISH THOMSON HOUSTON CO., Ltd., and SCOTT, W. J. Sept. 10, 1935, No. 25164. [Class 39 (i)] An electrode for a lamp having a filling preferably of metal vapour and rare gas comprises a thin-walled hollow cone of tungsten secured to an axial tungsten wire which projects through the apex and centres the arc. The cone may be of porous fritted tungsten moulded onto the wire and the apex may be rounded or a tungsten ball may be affixed to serve as the anode in alternate half-cycles. The ball may be incandescent. The cone may be coated or impregnated with emitting material and may be pre-fired in hydrogen. The axial wire may be sealed through the envelope or may be joined to a heat insulating wire loop mounted on the lead-in. A minute percentage of nickel may be added to the cone as a powder, a colloidal suspension, or a solution of a compound, or by ball-milling the tungsten in a nickel container. Sheet, gauze or sprayed-on nickel on the inner surface of the cone coated with emitting material is stated to improve the starting.
Patent GB-1197172-A (GB)
Title: Improvements in and relating to Filters
Inventor: DAVIS MAURICE
IPC: B01D46/52
Filed: 1966-06-07
Abstract: 1,197,172. Filters. DAVIS INDUSTRIAL EQUIPMENT CO. Ltd. 1 Sept., 1967 [7 June, 1966], No. 25255/66. Headings BID and BIT. . A filter comprises a layer 8 of broken-celled foamed plastics or knitted wire and/or one or more layers of fire-resistant fabric 9, clamped between frames 1, 2 which present complementary undulating surfaces 4, 6 along two sides to shape the layers to corrugated form. A wire frame 12, 13 provides further support, while fabric 9 has tapes 10 which loop over the sides 3 of the frames when the filter is assembled. Fabric 9 and wire frame 12, 13 may be located on one or each side of layer 8. Alternatively layer 8 is inserted into an envelope of fabric. The fabric and layer 8 are both washable. The peaks of surfaces 4, 6 are grooved to receive wires 12. Frames 1, 2 may be wood, metal, plastics or ceramic or may be of broken-celled foamed plastics, with additional metal frames clamping them to the filter layer(s).
Patent GB-988243-A (GB)
Title: Improvements in or relating to a surgical pad
IPC: A61F13/06
Filed: 1961-07-12
Abstract: 988,243. Surgical pads. SCROLL MFG. CO. Ltd. July 12, 1961 [July 13, 1960], No. 25281/61. Heading A5R. A surgical pad comprises a dumb-bell shaped blank of thermo-plastic material 1 with the enlarged ends 2, 3 superposed, so that the narrow connection 4 forms a digit loop, and heat-sealed around their bounding edges. This leaves the central parts of the end portions unsecured to each other so that they tend to separate, leaving a cavity 12, Fig. 4, which, if the upper portion 2 has an aperture 7, may be used to accommodate medicament. As shown in Fig. 4, the thermoplastic material is preferably a laminate of a cover sheet 5 and a sponge cushioning layer 6. The upper sealing die 8 is conveniently passed through the loop 4 prior to closing against the lower die 9.
Patent GB-1272764-A (GB)
Title: Improvements in or relating to door latches
Inventor: JAMES MICHAEL JOSEPH
IPC: E05C1/16
Filed: 1968-05-27
Abstract: 1,272,764. Latch fastenings. MICRO & PRECISION MOULDINGS (CHELTENHAM) Ltd. 19 May, 1969 [27 May, 1968], No. 25325/ 68. Addition to 1,185,641. Heading E2A. The specification relates to a door latch which is a modification of the latch disclosed in Parent Specification the modification consisting of providing the slot of the peg and slot connection between the actuating member and the intermediate follower member with a reduced mouth so that during assembly of the latch the reduced mouth provides a snap on connection between the two members.
Patent GB-275046-A (GB)
Title: Improvements in or relating to collision-guards for vehicles
IPC: B60R19/28
Filed: 1926-10-13
Abstract: 275,046. Pyrene Co., Ltd., and Zieschang, R. Oct. 13, 1926. Collision - guards. - A collision-guard for a vehicle comprises a substantially straight and rigid back bar 2 adapted to be attached to the vehicle by brackets 3 and two front bars 1 secured at their ends to the back bar 2 and carrying one or more leaf springs 6 bearing upon plates 14 fixed to the back bar. The leaf spring C is fixed to the front bars by a bracket comprising a front plate 8, centre plate 9 and rear plate 10, the front bars 1 being secured between the front and centre plates and the spring between the centre and rear plates, the whole being clamped together by bolts 7. The plates 14 form the means for clamping the back bar 2 to the brackets 3 and the outer surface of each plate is tapered towards the centre of the back weaker spring being acted upon by a collar on of the leaf spring.
Patent GB-655705-A (GB)
Title: Improvements in or relating to the cutting and polishing of diamonds
IPC: B24B9/16
Filed: 1948-09-30
Abstract: 655,705. Cutting and polishing diamonds. NAGY, A. Sept 30, 1948, No. 25522. [Class 60] [Also in Group VII] A method of cutting and polishing diamonds comprises subjecting the diamond to profile grinding with a lap coated with diamond abrasive so as to form thereon at least two faces simultaneously.' The lap is of cast iron and, in its simplest form, has a V-shaped periphery which may be used for cutting initials in a flat surface of a diamond. A multi-ribbed lap 10,. Fig. 1, may be used to cut a series of parallel V-grooves 14, the diamond being reciprocated during this process. A second set of V-grooves may be added at right angles to the first to produce the pattern shown in Fig. 2. A slice may now be sawn from the diamond along the line A-A and the sawn face of the slice treated in a somewhat similar fashion to produce the pattern of Fig. 3. A machine for carrying out these operations is shown in Fig. 9 in which the lap 10 is rotated by an electric motor, (not shown), and the diamond 12 is mounted in a holder 42 carried by an arm 43 pivotally connected to an arm 45 provided with a counterweight 49. The arm 45 is pivotally connected to a spring-loaded slide 47 reciprocated by an adjustable eccentric 52. The amount of feed of the diamond towards the lap is determined by the setting of a screw 54, and the feed is applied by a screw 54a carrying a ratchet wheel 54b which strikes a fixed pawl 54c on each reciprocation of the slide. A simplified form of this machine is used for making master tools for cutting laps. The grooves of the lap profile need not be straight-sided, and each side of the groove may be constituted by two plane surfaces meeting at an angle or by a curved surface. Laps rotating about an axis normal to the surface to be treated are used to produce a pattern of intersecting arcuate grooves of rectangular cross-section. The faces or the apex of a pyramid may also be treated by the method according to the invention, and diamonds may also be shaped into the outline of a cross, a heart, a star and the like. Various patterns are described, some of which are formed by a number of diamonds. ground to fit together. Specifications 541,451 and 613,072 are referred to.
Patent GB-1094688-A (GB)
Title: Improvements in or relating to the production of synthetic yarns, and yarns obtainedthereby
IPC: D01F8/12
Filed: 1965-06-17
Abstract: An extruded monofilament yarn comprises a core of synthetic material having low water-absorptivity, e.g. polyamides, polyesters such as polyethylene terephthalate, surrounded concentrically by a uniform sheath of synthetic material having a high water-absorptivity, e.g. a mixture of a polyamide or polyester with polypyrrolidone or polyvinylpyrrolidone, which may constitute 20-40% by weight of the total weight of the yarn.  The physical comfort provided by the sheath material combined with the mechanical strength, setting properties and stability of the core renders the yarn suitable for manufacture into wearing apparel.
Patent GB-798918-A (GB)
Title: Improvements in or relating to electric surge arresters
IPC: H01T1/14
Filed: 1956-08-22
Abstract: 798,918. Protective arrangements. SIEMENS SCHUCKERTWERKE AKT.-GES. Aug. 22, 1956 [Aug. 26, 1955], No. 25693/56. Class 38 (4). An electric surge arrester comprises a transparent housing composed of a material the transparency of which is unaffected when the arrester becomes unserviceable, and indicating means arranged to cause a removable deposit on the inner surface of the housing when the arrester becomes unserviceable. The arrester comprises a glass housing 1 closed by a cap 2 to hwhic is secured an earth terminal 4. The enclosed space contains a resistor 8, an arc gap chamrbe 11 and a fusible member 13 having a coating 17 of lacquer. When the arrester operates the fusible member 13 becomes hot, causing the lacquer 17 to burn off and be deposited on the inner surface of the glass housing 1 thus giving a visual indication that the arrester has operated. The eventually fusing of the member 13 interrupts the current path, thereby removing the short-circuit or earth path. Alternatively the member 13 may be constructed of a magnesium alloy which embodies simultaneously the function of the deposition medium and that of current interruption. After the arrester has functioned it may be stripped and cleaned and the housing re-used.