baber/WOPTO huggingface dataset:
Patent GB-1072423-A (GB)
Title: Improvements in or relating to boat propellers
IPC: B63H1/24
Filed: 1966-02-21
Abstract: 1,072,423. Screw propellers. D. W. BECK. Feb. 21, 1966, No. 7424/66. Heading B7V. A folding boat propeller comprises a hub (13, Fig. 4, not shown), formed at its rear portion with a pair of walls (13a, 13b) defining an open recess (13c), at its front portion with an opening (14) receiving the drive shaft (18) and at its intermediate portion with an opening (15) receiving the drive shaft-engaging nut (20), and a pair of propeller blades (10, 11), each having an ear portion (10a, 11a) sandwiched in said recess (13c) and pivoted on a bolt (12) mounted in said walls (13a, 13b), whereby said blades will automatically pivot outwardly and forwardly to a driving position (Figs. 1 and 1a, not shown), solely under the influence of centrifugal force when the hub (13) is rotated, with the blades automatically pivoting rearwardly and inwardly into a folded position (Figs. 3 and 3a, not shown), solely under the influence of water pressure.
Patent GB-599131-A (GB)
Title: Improvement in antenna duplexing
IPC: G01S7/03
Filed: 1944-04-21
Abstract: 5 9 9 , 1 3 1. Radio transmitting and receiving apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. April 21,1944, No. 7484. Convention date, April 21, 1943. [Class 40 (v)] In a pulse-echo transmitter-receiver combination in which the transmitter 10 is connected to the antenna 12 over line sections l, m, and the junction a of line sections l, m is connected to the receiver 13 through a quarter-wave line a-b having across its end b a spark-gap device d-e which breaks down during transmission, a further quarter-wave line b-c is added to thereceiver branch and the sections a-b, b-c are given a characteristic impedance greater than, e.g. twice, that of the transmitter line sections l, m and of the remaining receiver line section n. The spark-gap device comprises a short line section e-b provided with a tuning plug 28 and a line section b-d provided with the spark gap 21. The latter, Fig. 2 (not shown) may be a neon glow tube mounted in a glass envelope on a metal base plate connected to the outer conductor of the section b-d, one electrode being connected to the base plate and the other to the inner conductor. The line e-d is tuned so that the equivalent of a parallel resonant circuit is provided at point b in the ,absence of a transmitter pulse and impedance at that point will be high. The quarter-wave lines may be any odd number of one quarter wavelengths long. The line sections l and m are provided with trombone sections for tuning the transmitter and matching impedances and the impedance of the line sections a-b and b-c may be varied by varying the diameter of the inner conductor. The line section l is tuned with the transmitter to present a high impedance looking from point a towards the transmitter compared with the impedance presented at the point c looking towards the receiver.
Patent GB-104971-A (GB)
Title: Improvements in Cloth Stenter Clips.
IPC: D06C3/04
Filed: 1916-05-27
Abstract: 104,971. Farmer & Sons, Sir J., and Rawlinson, S. May 27, 1916. Tentering. - The pawl of a tentering-clip is provided with an anti friction-ball support. The ball d, which is adapted to co-operate with a countersinking e' in the sole-plate e, is mounted so as to be free to revolve in any direction, in a casing c integral with, or attached to, the pawl b, or carried on an arm adjustably secured to the pawl pivot spindle. The lower part of the casing is of smaller diameter than that of the ball, and it may be provided with claws. The upper end of the casing may be closed by a screw cap c<2> having a part adapted to bear on the ball, or provided with one or more smaller balls to diminish friction; or the ball may be engaged by a pin passing through the casing. The weight of the parts may be counterbalanced by mounting the pawl eccentrically on the arm carrying the casing. Two casings and two balls may be employed.
Patent GB-340180-A (GB)
Title: Anti-syphon traps
IPC: E03C1/294
Filed: 1930-03-07
Abstract: 340,180. Drainage traps. DU BOIS CO., Ltd., 15, Britannia Street, King's Cross, London. March 7, 1930, No. 7552. Convention date, March 14, 1929. [Class 33.] The opening of the inlet pipe 2 is covered by a downwardly curved baffle 6 and the opening of the outlet 3 by an upwardly curved baffle 7. The baffles extend to about the centre of the trap and the outlet baffle 7 is curved as at 8. The body of the trap has a larger diameter than the pipes 2, 3, and also than its upper and lower ends, which are provided with cleaning caps 4, 5.
Patent GB-1530008-A (GB)
Title: Memory cell
IPC: G11C11/412
Filed: 1976-02-26
Abstract: 1530008 Transistor bistable circuits RCA CORPORATION 26 Feb 1976 [13 March 1975] 07673/76 Heading H3T A memory arrangement comprises: a bi-stable memory cell 28, 42 connected between a voltage supply bus 22 and a point of reference potential, e.g. earth, and having a first input node 32, said cell exhibiting between the bus 22 and the node 32 a relatively low impedance in one state, and a relatively high impedance in the other state; a first switch 34 connected between the node and an input voltage applying means 16, the switch 34 having an "ON" impedance higher than the relatively low impedance but lower than the relatively high impedance; a second switch 10 connected between bus 22 and a point 12 for receiving a supply voltage; means for writing information into the cell including means for closing switch 34 and opening switch 10 whereby the voltage on the bus falls towards the reference potential, the cell being switchable when the voltage has fallen to a particular value; and means 14, 18 independent of the second switch for automatically supplying a voltage of a given value to bus 22 after the cell has been switched during a write operation, to provide a path between bus 22 and a point of given potential which has an impedance much higher than the "ON" impedance of switch 34 but much lower than the steady state impedance of the cell between bus 22 and the point of reference potential. Read operation.-Assume "1" is stored, with transistors 26, 38 on, and transistors 24, 40 off, then with a zero volts "read" signal at 13 and a +V address signal at 36 transistors 10, 34, 48 are made conductive, the high "on resistance" of transistors 34, 48 preventing any triggering of the state of the bi-stable. Write operation.-To change the state of the bistable to "0", data signal 0V is applied to line 20 turning off transistor 18 and a complementary data signal + V is applied to line 16 turning on transistor 14, a +V write signal is applied at 13 turning transistor 10 off, and an address signal is applied at 36 turning on transistors 34, 48. The node 46 is at +V and the node 32 is at zero volts and this condition will not change immediately due to the high "on" resistances of the transistors 34, 48. In this condition the bus is 22 coupled to + V on line 16 via the high resistance of conductive transistor 14 relative to the "on" resistances of transistors 38, 48 and therefore moves towards earth potential as the stray capacitances of the circuit discharge. As the bus voltage falls the voltages at nodes 46,30 fall tending to turn transistor 26 off and transistor 24 on. At the same time the + V voltage from line 16 via transistor 34 raises the potential at 32, 44 tending to turn transistor 38 off and transistor 40 on, thus switching the state of the bi-stable. Once switching is completed the fall voltage of +V appears and is applied to bus 22 via transistor 14 since no current flows through the bi-stable to earth in the steady state.
Patent GB-1088023-A (GB)
Title: Method for the production of shaped foamed compositions
Inventor: WINCHCOMBE JOHN JEREMY
IPC: C08J9/34
Filed: 1964-02-24
Abstract: 1,088,023. Moulding cellular polyurethane. DUNLOP CO. Ltd. Jan. 18, 1965 [Feb. 24, 1964], No. 7683/64. Heading B5A. A method for the production of a shaped foamed polyurethane composition comprises placing in a mould a lining of a thin sheet formed from a non-metallic material that is releasable from a foamed polyurethane composition, the sheet having been shaped prior to placing within the mould to correspond substantially to the shape of the mould, placing a polyurethane foam-forming composition in the mould and allowing the composition to foam and gel within the lined moulding cavity of the mould, removing the lining from the mould with the gelled foamed polyurethane composition, allowing the foamed composition to mature, and removing the lining from the shaped foamed composition without destroying the surface skin of the shaped composition.' The gelled foamed composition contained within the lining after removal from the mould may be matured by heating e.g. at a temperature of up to 80‹ C. The lining may be formed from a thermoplastic non-metallic polymeric material that has a softening point in excess of the temperature at which the foamed composition is matured, e.g. from a polyolefine such as polyethylene or polypropylene. The lining may be shaped to conform to the mould surface by vacuum forming prior to insertion in the mould. The mould may be formed from polypropylene, glass fibre wetted with a liquid epoxy resin, or from acrylonitrile-butadiene-styrene sheet. The foam-forming composition may comprise a polyurethane prepolymer containing free isocyanate groups, which is the reaction product of a polymeric polyol and a polyisocyanate, and a compound containing active hydrogen atoms readable with the free isocyanate groups to generate carbon dioxide to effect foaming of the composition, or the composition may be prepared by mixing together immediately prior to placing within the lined mould a polymeric polyol, a polyisocyanate, and an active hydrogen atom-containing compound. The polymeric polyol may be a polyester or a polyether and the poly. isocyanate may be an aromatic or an aliphatic diisocyanate, examples of which are given. The foam-forming composition may contain a cross-linking agent, a chain-extension agent, or a catalyst to accelerate cross-linking or chain extension of the composition.
Patent GB-1030613-A (GB)
Title: Improvements in or relating to iron-aluminum alloys
Inventor: CABANE GERARD
IPC: C21C7/00
Filed: 1963-02-26
Abstract: A process for the preparation of alloys containing iron and aluminium comprises: (a) melting iron to amount to less than 84% of the final alloy which does not contain more than 0.02% carbon; (b) adding the other constituents, including at least one grain refining additive, to the iron melt; (c) casting the melt in vacuo, in an inert atmosphere or under a protective flux; and (d) hot working the ingot at 600 DEG C-1200 DEG C. to destroy the casting structure. The additional constituents of the alloy may comprise up to 1% in total of one or more of Zr, Nb, Ti, Y, B and rare earth metals and up to 40% Al. For nuclear application, (e.g. cladding for fuel elements or magnets in nuclear reactors) Be and Si may also be added.  The hot working of the ingot is preferably preceded by cladding with a metallic jacket which is eliminated after the working stage. The alloy may be annealed after the working steps and may also be cold worked.
Patent GB-781326-A (GB)
Title: Announcing apparatus
IPC: G11B33/06
Filed: 1955-03-16
Abstract: 781,326. Announcing apparatus. BARTHE, P. March 16, 1955 [March 17, 1954], No. 7740/55. Class 40 (4). Apparatus on a public service vehicle produces pilot signals as the vehicle approaches places of interest to cause the reproduction of pre-recorded announcements. At the beginning of the route a button 4 is depressed to make the apparatus operative. A tape 6 is driven by the mileometer 2 and is pre-formed with holes for the actuation of contacts whereby a taperecorder-reproducer 9 is started up before a place of interest is reached to reproduce in a speaker 12 an announcement about the place.
Patent GB-705980-A (GB)
Title: Improvements in or relating to an apparatus and method for applying a continuous layer of cementitious material to the surface of a vertical structure
Inventor: JNR ALLAN MORTIMER HIRSH
IPC: E04G11/20
Filed: 1952-03-26
Abstract: Apparatus for applying a continuous layer of cementitious material to a vertical surface of a core, such as a pipe, comprises a hopper having opposite walls arranged one within another with lower edges displaced vertically with respect to each other constituting the marginal edges of a discharge opening concentric to the core, means for vibrating at least one of the walls, and means for raising the hopper alongside the surface of the core.  A core 12 is encircled by an annular coating hopper 10 and an annular supply hopper 11.  The hoppers 10 and 11 are supported from cables 29, 30, 31 and 32 passing over pulleys 28 to four winches 13, 14, 15, and 16 mounted on a platform 17 supported on the upper end of the core.  The winches are driven by a motor 20 to progressively elevate the hoppers as the coating is extended upwards.  The supply hopper 11 has concentric walls 34 and 35 with portions converging to provide a discharge opening 36, extending concentrically about the core, and a valve 37 in the form of a ring which controls the feed of material 38 to the coating hopper 10.  The coating hopper 10 is formed by concentric walls 48 and 49, and has a discharge opening formed by the lower edges 52 and 53 of the walls 48 and 49.  A plurality of vibrators 60 and 64 are attached to the edges 52 and 53 to assist the movement of the relatively dry and stiff cementitious material through the coating hopper, and the vibrations of the lower part of wall 49 compacts the material against the surface of the core. A <PICT:0705980/III/1> coating 86 is produced, which is trowelled smooth by the lower part of wall 49.  A modified form of the apparatus is used for coating the inside surface of a hollow core:
Patent GB-145841-A (GB)
Title: Improvements in or relating to typewriters with detachable platen-carriages
IPC: B41J19/74
Filed: 1919-03-27
Abstract: 145,841. Etheridge, H., and Bar-Lock Typewriter Co. March 27, 1919, Paper-carriages.-A detachable carriage-holder is supported at the back by an open jaw on the holder engaging a stud on the framework, or vice versa., the stud being parallel to the axis of the platen, and is supported at the front by means which permit the holder to be detached by being turned upwards, about the axis of the stud, and then drawn off the stud. The supporting-means may be arranged to permit of adjustment of the platen with reference to the printing-line. As shown, the holder D is formed at each end with an arm E, provided with open jaws E<1>, E<2> for engaging studs B, B<1>, which are mounted in lugs A<1>, A<2> on the framework A. The holder may carry pivoted catches F for engaging the studs B<1>. The studs B are formed with reduced shanks which are threaded into the lugs A<1>. The studs B<1> are formed with reduced shanks B<2> which pass through enlarged holes in the lugs A<2> and are threaded to receive securing-nuts B<3>, the arrangement enabling the holder to be adjusted in the vertical and fore-and-aft directions. The arrangement of the studs B below the level of the platen prevents the ribbon arms from fouling the platen carriage C when the holder is turned upwards or downwards. The platen carriage overhangs the holder and is formed at the back with a jaw, balls D' being arranged in races formed in the holder and the jaw.
Patent GB-626239-A (GB)
Title: Improvements in or relating to the removal of stains and coatings from the surfaces of metals
IPC: C25F1/06
Filed: 1947-03-21
Abstract: 626,239. Cleaning by electrolysis. BRITTON, ,J. W., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. March 21, 1947, No. 7793. [Class 41] Stains and coatings are removed from the surface of iron and steel articles by immersing them in an alkali metal cyanide solution, e.g. in concentrations of from 1 to 10 per cent and preferably from 4 to 6 per cent by weight of the cyanide at a temperature of from 10‹ to 70‹ C. and preferably from 45‹ to 55‹ C., in which metallic zinc or aluminium or an alloy of zinc or aluminium is also immersed while electrical contact is maintained between the articles and the metal or alloy specified. The electrical contact between the article and the metal in the solution may be made externally, e.g. by means of a wire conductor or internally by allowing the metal article to touch each other under the surface of the solution. The metal may be in rod, sheet or granulated or powdered form and in the latter case the mixture of metallic powder and solution must be stirred. Several examples are given employing sodium cyanide solutions and metallic zinc.
Patent GB-609399-A (GB)
Title: Improvements in and relating to electrical gauges for measuring ball bearing inner race grooves
Filed: 1946-03-13
Abstract: 609,399. Linear-dimension gauges. JACK & HEINTZ, Inc. March 13, 1946, No. 7801. Convention date, Sept. 15, 1945. [Class 106 (ii)] An electrical gauge for measuring and checking the outer groove of an inner ballbearing race comprises a frame having side walls 16, 17 held together by rods 20, 21, and pivoted to the outer walls 12, 13 by screws 14, 15. Secured to the walls 16, 17 are leaf-springs 29, 31, the other ends of which are connected to a housing 33. An arm 37 with a work-engaging member 40 is rigidly connected to the housing 33. In the other part of the housing is fixed an electrical displacement pick-up unit as described in Specification 601,053, with a workengaging point 39. In operation the ballbearing assembly inner race is laid on a platform 26 and slid into position when it is engaged by the work-engaging points 39, 40. Since the walls 16, 17 are pivotally mounted and the housing 33 is floating the point 40 is hold against the race, and any displacement of the movable stylus 39 may be read by means of the pick-up circuit.
Patent GB-732402-A (GB)
Title: Improvements in or relating to cameras for use in medical x-ray photography
IPC: G03B42/02
Filed: 1953-03-26
Abstract: 732,402. Photographic cameras. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 23, 1953 [March 26, 1952], No. 7912/53. Class 98 (1). A camera for photographing an X-ray image on a fluorescent screen having a removable roll-film magazine containing a take-up spool is characterized in that the magazine contains a film guide constituted by two bands of flexible material following the path of the film, which bands are secured to the take-up spool and grip the film between them near the inlet aperture for the film. As shown, the camera comprises a housing 1 with a concave spherical mirror 2 at one end. A part 24 of the film magazine is fixed, preferably releasably, to the housing, and carries a spool 25 for the film 8. An arm 13, pivoted on a shaft 12 mounted in the magazine walls, carries guide rollers 9, 10, 11 and a spherical pressure table 14 over which the film 8 is led. The arm 13 can be rocked by means of a cam 18 to press the film against a frame 16 by means of the pressure table 14, or to free the film for winding. The film is shielded from light by an enclosing screen 7. The film is led between rollers 45, 46 and through slots out of the magazine part 24 and into a removable part 30 of the magazine containing the take-up spool 26 to which the end of the film is attached. The part 30 has a hook 32 at one end engaging a pin 31 on part 24. At the other end, the part 30 has a lug 35 engaged by a key 33 urged inwards by a spring 38. A plate 41 extending from the key has a slot through which the film passes, and one edge of the slot is bevelled so as to cut the film when key 33 is pulled out to release the part 30, which may be removed to a dark room where it is opened by removing a side lid. When the part 30 is re-attached, the film is pulled through the slot by turning one of the rollers 45, 46 by an external knob. The film end is then led between two ribbons 49, 50, e.g. of nylon, which are led from spools 51, 52 in the part 30 over guide rollers 55, 56, 57, 58 and attached to the spool 26.
Patent GB-195379-A (GB)
Title: Improvements in manuscript holders
IPC: B41J29/15
Filed: 1923-03-20
Abstract: 195,379. Steiner, F., and Arber, W. March 22, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Copy-holders.-A copy-holder for use with a typewriter comprises a roller 9 mounted between two arms of a framing 3, Figs. 3 and 8, which is adjustably supported on a pedestal, means for clamping the manuscript in position, a straightedge adapted to press resiliently upon the manuscript, and a pawl-and-ratchet device for moving the roller. The roller is provided with a flattened surface 13 upon which the manuscript is clamped by a claw 14 fixed to a bolt 16, Fig. 4, slidablv mounted in a slot in the roller and acted upon by a spring 15 to hold the claw against the roller. The claw is released by pressure on the head 18 of a pin 17 sliding in an axial slot in one end of the roller, and normally held in retracted position by a spring 20 mounted in the hollow hut 11 of the roller, the inner end of the pin being bevelled to engage with a bevelled wall of a slot 19 in the bolt 16. The hub 11 is provided with a relatively slidable 'but non-rotatable handle 10, which may be clamped fast to the arm 2 by a nut 12 to prevent rotation of the roller 9. A reduced portion 49 is formed on the roller toaccommodate any extra thickness at the edge of the manuscript. A straight-edge 22, carried by lugs 23, Fig. 3, is pivoted on extensions 24 of the arms 2 and is held in its normal position to hold the manuscript close to the roller, or in its overturned position to permit the manuscript to be adjusted, by a spring 25 acting between the respective lug 23 and the axis. pin of the roller. In order to feed the roller' forward, a ratchetwheel 31 is attached to one end thereof and is engaged by a pawl 30 pivoted to the short arm of a lever 28 which is pivoted at 27 to the corresponding arm 2 of the framing. The lower arm of the lever is held in various positions to limit its movement, and consequently the rotation of the roller, by means of tappets of different depths on a cam 34 journaled in a bracket 35 on the arm 2. A spring 29 returns the pawl 30 and lever 28 to normal position after operation. An extension 38 may 'be formed on the lever 28 and connected by a Bowden cord 39 to a bell-crank lever placed near to the operator. The device may be secured directly to the pedestal, or through the medium of arms 43, 45, 46, Fig. 8, arranged in the form of a parallelogram, providing for adjustment parallel to the platen roller of the typewriter to suit the sight of the operator.
Patent GB-992390-A (GB)
Title: Improvements in or relating to gymnastic equipment
Inventor: HASKAYNE CYRIL
IPC: A63B1/00
Filed: 1961-03-04
Abstract: 992,390. Clamp fastenings. H. HUNT & SON Ltd. Feb. 28, 1962 [March 4, 1961], No. 7960/61. Heading E2B. [Also in Division A6] Gymnastic equipment comprises a cross-bar adjustably supported between uprights by means of a collar or the like adjustable along an upright the opening in the collar providing a material amount of play at least in the direction of length of the bar and with means for securing the collar to the upright. The collar 21, attached to the cross-bar 15, comprises a rectangular frame which is slidable on the upright 10 with play in the frame to allow for misalignment of the uprights. The collar is secured to the upright by a pin 25 engaging holes in the frame and upright. An anvil 29 in the frame bears upon the upright. The anvil is connected to a plate 26 adjustably slidable in slots 28 in the frame by turning a handle 30 connected to a screw thread engaging nut 31 on the frame and terminating within the frame in a head 33 which bears on the plate 26.