baber/WOPTO huggingface dataset:
Patent GB-730734-A (GB)
Title: Improvements in helicopter aircraft control
Inventor: YOUNG ARTHUR MIDDLETON
IPC: B64C27/625
Filed: 1953-03-10
Abstract: 730,734. Helicopters. BELL AIRCRAFT CORPORATION. March 10, 1953, No. 6594/53. Class 4. A helicopter includes a driving shaft 20, a hub 14 universally mounted thereon, a blade or pair of diametrically opposite blades 10, 11 extending from the hub defining a rotor unit, and rotating inertia means linked to the blades characterized by a device for limiting inclination of the rotor unit relatively to the shaft about an axis transverse to the longitudinal axis of the blades. The blades 10, 11 are rigidly mounted by yokes 12 on the hub 14, lugs 15 on which are pivoted at 16 to a gimbal member 18 itself pivoted at 19 to the drive shaft 20. A rocking beam 25 is pivoted to the shaft at 30, and has extensions 26 carrying faired weights 28 to provide a rotating flywheel. Each end of beam 25 carries a lever 32 pivoted at 34, the other end of each lever being connected to a pitch control rod 42, and the centre being connected by a rod 36 to arms rigid with the yokes 12 for pitch change purposes. A cable 44 connects pivots 16 through a spring or other elastic connection with a bolt 46 on that arm of the flywheel preceding the pivot 19 in the direction of rotation. Operation of rods 42 will actuate rods 36 to change the rotor blade pitch, and any deviation of the rotor shaft 20 from the vertical will cause the beam 25 to flap relative to the shaft, applying a cyclic pitch alteration to the blades to restore shaft 20 to the vertical. The action of cables 44 is that a tilting of the rotor shaft about the axis transverse to the blade axis will cause one or other of the cables to pull on the beam 25 which will then precess, actuating the rods 36 to adjust the blade pitch cyclically to adjust the rotor tip path plane to remain at right angles to the drive shaft 20 Specifications 580,231 and 600,013 are referred to
Patent GB-1012938-A (GB)
Title: Improvements in or relating to liquid sprinkler apparatus
IPC: B05B3/16
Filed: 1964-02-18
Abstract: 1,012,938. Spray - producers. MOIST O'MATIC Inc. Feb. 18, 1964 [April 29, 1963], No. 6693/64. Heading B2F. An oscillatable lawn sprinkler comprises a housing 1 having a slotted cover 4 and containing a sprinkler head 13 mounted on a water-feed tube 12 oscillatably driven by a motor 9. The latter is of the "fluid" type, the motive force of which derives from the water being fed to the head through the tube 12. The head 13 is in the form of a water-receiving chamber 15 having an inwardly curved upper wall 16 formed with two series of upwardly projecting nozzles 18 helically disposed relative to the axis of curvature of the wall. The housing cover 4 is so shaped that a slot 20 formed therein is in longitudinal section, as shown in Fig. 4, with inclined end walls 21 and an arcuate centre portion, both side walls of the slot being upwardly diverging in parts as shown by the shaded areas for one side wall in Fig. 2. In operation, water from the motor 9 passes into the chamber 15 through a slot 14 in the underside of the tube 12 from whence it emerges as jets from the nozzles 18 in the associated direction B, Fig. 3, each jet intersecting an imaginary line A, Figs. 3 and 4. The area water by the sprinkler is thus rectangular the length of the rectangle being determined by the angle of oscillation of the head 13.
Patent GB-1386641-A (GB)
Title: Semiconductor amplifying and rectifying circuit
IPC: G06G7/25
Filed: 1972-02-14
Abstract: 1386641 Pulse circuits; block pulse extraction circuits STANDARD TELEPHONES & CABLES Ltd 14 Feb 1972 6700/72 Headings H3T and H4P A circuit for producing mono-polar signals and thus a sine ware from bilpolar input signals, e.g. to indicate the frequency of pulse time-slots, comprises two transistors receiving the input  signals in erect and inverted forms respectively and having a common output coupled to the input of a biased transistor having a resonant circuit at its output. Transistors 1 and 2 are biased from potentiometer 13, 14 via transistor 3 to be normally non-conducting so that only positive and negative portions of the inputsignal above a given amplitude cause one or other of transistors 1 and 2 to conduct and  divert current from transistor 3. The resulting pulses cause a tuned circuit 12 to ring and thus to produce the sine ware output at 18. The amplitude of the pulses my be adjusted by varying resistor 11.
Patent GB-453482-A (GB)
Title: Improvements in or relating to the production of vanillin and like alkoxy-hydroxy-benzaldehydes
IPC: C07C45/29
Filed: 1935-03-04
Abstract: Vanillin and like alkoxy-hydroxy-benzaldehydes are prepared by oxidizing a 4-hydroxy-3-alkoxy phenyl glycollic acid having the general formula <FORM:0453482/IV/1> (where R represents an alkyl group) to the corresponding 4 - hydroxy - 3 - alkoxy - benzaldehyde by heating in an aqueous solution of caustic alkali with an aryl nitro compound in which the aryl group does not contain any negative substituent.  The glycollic acid may be produced by hydrolysis of the corresponding trichlorocarbinol compound, and the oxidation may be performed either simultaneously or successively.  The preferred oxidizing agent is nitrobenzene, but other agents which may be used are nitrotoluene, dinitrobenzene and their homologues.  The preferred temperatures are from 110 to 170 DEG  C.  In examples: (1) trichloromethylguaiacyl carbinol is oxidized in caustic soda solution with nitrobenzene at 150 DEG  C. for two hours.  The product is extracted with benzene, acidified with hydrochloric acid, and the vanillin extracted with ether; (2) as in example (1) except that the caustic soda solution is less concentrated; (3) as in example (1) except that meta-dinitrobenzene is used as the oxidizing agent; (4) trichloromethylguaethyl carbinol is treated as in example (1) to yield ethavan (3-ethoxy-4-hydroxy-benzaldehyde); (5) as in example (4) except that the heating was at a lower temperature for a longer period; (6) as in example (4) except that the heating was at a higher temperature for a shorter period; (7) as in example (4) except that the oxidizing agent is meta - nitro toluene; (8) trichloromethylguaethyl carbinol is hydrolyzed in caustic soda solution to the guaethyl glycollic acid which is isolated and then separately oxidized by nitrobenzene to 3-ethoxy-4-hydroxybenzaldehyde.  The trichlorocarbinol compound may be produced by condensation of chloral or chloral hydrate with a 2-alkoxy phenol.
Patent GB-1454211-A (GB)
Title: Polyphase synchronous electrical rotary machine
IPC: H02K55/04
Filed: 1974-02-14
Abstract: 1454211 Automatic control of phase angle AGENCE NATIONALE DE VALORISATION DELA RECHERCHE 14 Feb 1974 [21 Feb 1973 7 Jan 1974] 6837/74 Heading G3R [Also in Division H2] In a polyphase synchronous electric machine having a superconductive field winding 115 rotatable relative to a shaft 114 carrying an auxiliary winding 128 but in which the windings 115 and 128 are kept in synchronism by varying the current in winding 128 in dependence on the power component of the stator current, the angular offset # between the magnetic fields H 115  and H 128  of the windings 115 and 128 is kept within a chosen range, shown hatched in Fig. 5 preferably from 30 degrees to 60 degrees. To achieve this, a field sensor 136 detects any offset between windings 115 and 128 and feeds a control circuit which decreases the current in winding 128 if H 128  leaves the hatched zone, Fig. 5, in the direction of H 115  and increases the current in winding 128 if H 128  leaves the hatched zone in the direction of Hm (the component of H 128  parallel to Ha, the power component of the stator field rector H 111 ). Reference has been directed by the Comptroller to Specification:- 1282412.
Patent GB-656568-A (GB)
Title: Improvements in or relating to electron discharge devices
IPC: B60K17/34
Filed: 1948-03-05
Abstract: 656,568. Travelling-wave tubes. STANDARD TELEPHONES & CABLES, Ltd. March 5, 1948, No. 6866. Convention date, March 8, 1947. [Class 39 (i)] In a travelling-wave amplifier, the electron beam is deflected periodically in passing through a cavity resonator 6, across two openings 9, 9A in an electrode 8, so as to provide two bunched beams for transferring energy to two helices 11, 11A. A travelling wave having a component of velocity approximately equal to, and in the same direction as, that of the bunched electrons is set up in each helix. Accelerator electrodes 10, 10A are provided between the electrode 8, and the helices 11, 11A. The helices may be of decreasing pitch, or of constant pitch, but divided into sections having increasing potentials. In a modification, Fig. 2, the helices are curved, and united at their outer ends 18 where there is provided a common output 19 for the waves. In another modification deflecting and focusing electrodes are provided between the electrode 8 and the accelerating electrodes 10, 10A, so as to cause the bunched beams to travel parallel with the direction of the unmodulated beam. Magnetic focussing coils surrounding the helices may be provided. Specification 656,561 is referred to.
Patent GB-557533-A (GB)
Title: Improvements in or relating to electrical systems, particularly systems for converting direct current into alternating current
IPC: H02M7/62
Filed: 1942-05-20
Abstract: 557,533. Converting. STEVENS, A. H. (Electronic Laboratories, Inc.). May 20, 1942, No. 6877. [Class 38 (ii)] In an arrangement whereby D.C. from a source 25, 26 is converted into A.C. in a load circuit 16 by means of a self-interrupter 10 which supplies an intermittent current to the two halves of the centrally-tapped primary of a transformer 11, the intermittent currents proceed from the reed 17 through contacts such as 19, 21 in parallel circuits which lead to the transformer primary through the two halves 40, 41 of a winding of a balanced inductance 18 and capacitors 29, 30 are also arranged between each pair of contacts such as 19, 20 on opposite sides of the reed. The two halves 40, 41 oppose each other magnetically so that normally the resultant indtictance is nil but should one contact 19 or 21 break before the other the inductance 40 or 21 will prevent transfer of the current from the one parallel circuit to the other. Similar contacts 20, 22 are arranged on the other side of the reed 17 and feed the two halves of a second winding of the inductance 18. The capacitors 29, 30 act not only as buffers but also as currentdiverters to receive the current which formerly flowed through an interrupted contact. In a modification, Fig. 2 (not shown), there are four pairs of contacts engaged by the reed 17 instead of two pairs. The additional two pairs feed a second inductance similar to the inductance 18 and centre tappings from these two inductances lead to the halves of a third inductance the centre tappings of which lead to the transformer primary. Specification 550,974 is referred to.
Patent GB-864383-A (GB)
Title: Improvements in or relating to typographical line composing and casting machines
Inventor: SCOTT RICHARD HENRY
IPC: B41B11/38
Filed: 1958-03-04
Abstract: 864,383. Type-bar-making machines. LINOTYPE & MACHINERY Ltd. Feb. 25, 1959 [March 4, 1958], No. 6883/58. Class 100(3)  Record-strip control; clamping matrices. A quadding control device for a typographical line-casting machine of the kind wherein matrices released from a magazine are composed in line in an assembler elevator and transferred to a first elevator which carries the line to casting position between a pair of vise jaws and then returns it for distribution, the functions of the machine being controlled by a coded tape, includes a code marking on the tape immediately preceding the "elevate" marking, a signal being produced by the quadding marking during the assembling of the line, means for transferring the signal to a relaying device actuated by the entry of the line into the first elevator, and means actuated by the relayed signal whereby during the descent of the first elevator the vertical control rod for the vise jaws will be rotated to a position corresponding to the quadding marking on the tape. The signal produced by the tape marking energises a rotary solenoid 3, Fig. 2, and moves its lever 4 counter-clockwise to the position shown, where it is held by a latch 7. When the assembler elevator lever 10 is raised, screws 11, 12 on an arm 9 respectively close a switch 5 and release the latch 7. Closing of the switch 5 energises a rotary solenoid 16, Fig. 4, whereupon a catch 19 is raised, and locked by a lug 24 engaging a block 15. When the line delivery carriage delivers the line to the first elevator, it also strikes a pusher 22 to actuate a striker lever 20, a lug 26 on which engages under a lug 23 on the catch 19, causing the latter to close a switch 17. On retraction of the lever 20, the catch 19 and solenoid 16 are released. Closing of the switch 17 energises a solenoid 37, Fig. 6, on a rack 32 slidable in the vise frame 35, and a pawl 40 is projected into the path of a catch 42 on the first elevator 43. On descent of the elevator, the rack 32 is lowered, rotating a wheel 30 on a shaft 31 carrying a skew gear engaging a gear 47 on the vertical vise jaw control rod 44. The amount of rotation of the rod 44 depends on the position of the pawl 40. There is therefore provided a pawl 40, together with a corresponding assembly 37, 17, 19, 20, 22, 16, 5, 11, 12, 3, for each sort of quadding marking there may be on the tape, e.g. "quad left", "quad right", or "centre". Specification 762,977 is referred to.
Patent GB-191652-A (GB)
Title: Improvements in the manufacture of slippers or shoes
IPC: A43B9/08
Filed: 1922-03-09
Abstract: 191,652. Ashworth, H., and Hoyle, W., (trading as Ashworth & Hoyle), and Nixon, A. March 9, 1922. Connecting uppers to insoles and soles.-A slipper or shoe of the turn-shoe type, is provided with a cushion above, the level of the outer sole a, without stitches existing at the tread side thereof. The cushion is formed of a strip of felt b, b<1>, or other material, one edge of which is attached, by sewing or otherwise, to a lip a<1> channelled up from the sole, and the other is sewn to the upper d while, the upper is turned inside out. The sUpper is then turned back and an insole e is added. The colour of the felt b, b<1> or other material may, for ornamental purposes, be different from the colour of the upper.
Patent GB-579650-A (GB)
Title: Improvements relating to the extraction of methane
IPC: F25J3/06
Filed: 1942-05-23
Abstract: Gas mixture containing methane is enriched in methane by dissolving this gas out under pressure, especially by n-pentane, the dissolved gases being afterwards released and refrigerated to produce liquid methane.  The gas may pass first through an absorption tower, from which the unabsorbed residual gas is led to a separator in which any solvent is removed; the lean gas may be used as fuel.  The solution formed in the tower is passed to a stripper in which pressure is reduced, the gas evolved being conveyed to a liquefying plant after further separation of liquid, and the liquid solvent from the stripper being returned to the storage tank for re-use. Specification 216,140, [Class 8 (ii)], is referred to.
Patent GB-1519311-A (GB)
Title: Anti-glare vehicle rear view mirror
IPC: G02B1/04
Filed: 1975-02-19
Abstract: 1519311 Mirrors; filters COMBINED OPTICAL INDUSTRIES Ltd 18 Feb 1976 [19 Feb 1975 16 July 1975] 7061/75 and 29909/75 Heading G2J [Also in Division B7] A mirror for use as an anti-glare vehicle rearview mirror includes a transparent plastics moulding (e.g. of polymethylmethacrylate or polycarbonate) having therein, or on a surface thereof, a light absorbing material (e.g. phthalocyanine green eitheralone or with modified phthalocyanine blue) which absorbs light more strongly in the range 580- 700 nm than 400-580 nm. Since the intensity of light reflected by the mirror is reduced at larger wavelengths, there is a greater reduction in the brightness of vehicle headlamps seen in the mirror than of street scenes lit by Hg vapour lamps. The reflecting surface is produced by metallizing.
Patent GB-710589-A (GB)
Title: Combustion chambers for jet engines or gas turbines
Inventor: CLARKE JOHN STANLEY
IPC: F23R3/06
Filed: 1952-03-19
Abstract: 710,589. Generating combustion products under pressure. LUCAS (INDUSTRIES), Ltd., J. March 11, 1953 [March 19, 1952], No. 7063/52. Drawings to Specification. Class 51 (1) In an annular air-jacketed combustion chamber of a gas turbine or jet propulsion engine, the ratio of the total cross-sectional areas of the air inlet openings in the outer and inner walls of the annular flame tube is between 1.125 and 1.375 to 1, preferably 1.25 to 1. The cross-sectional areas of the outer and inner air passages may be in the same ratio. The object of the invention is to achieve a substantially uniform distribution of temperature in the hot gases at the discharge end of the combustion chamber.
Patent GB-778426-A (GB)
Title: Anti-vibration mounting
Inventor: SMITH ERIC JAMES
IPC: F16F1/54
Filed: 1955-03-10
Abstract: 778,426. Resilient mountings. DUNLOP RUBBER CO., Ltd. March 2, 1956 [March 10, 1955], No. 7083/55. Class 108(3). An anti-vibration mounting comprises an elongated channel member 6, a wedge-shaped inner member 7, and resilient material 8, located between the opposed faces of the members 6, 7, so that the member 7 is movable towards the base of the member 6 against combined compression and shear of the material 8, the members 6, 7, also being movable relatively in a direction longitudinally of the member 6 against shear stress in the material 8. As shown, the material 8 is in the form of two pairs 8, 9, of rubber blocks, the pair 8 operating in shear and the pair 9 operating in combined compression and shear under vertical movement of the member 7. Extreme downward deflection is limited by a pad 10. The walls of the member 6 may be tapered in a longitudinal direction so that the blocks 8 and 9 are stressed in combined compression and shear on relative horizontal movement of the members 6, 7. In a further modification, Figs. 5 and 6 (not shown), the material 8 is moulded in one continuous piece, between both opposing side faces and the opposing end faces of the members 6, 7. A hole is bored in the material 8 at an intermediate point in the length of each limb of the channel defined by the material 8. The diameter of this hole is slightly less than the total width of the material between the opposed faces of the members 6, 7, and it has the effect of dividing the material 8 into two independently acting blocks like the blocks 8 and 9 in Fig. 2. A cavity is cut away in the material at the base of the channel to provide a buffering pad equivalent to the pad 10 of Fig. 2.
Patent GB-178087-A (GB)
Title: Improvements in syringes
IPC: A61M3/00
Filed: 1922-03-10
Abstract: 178,087. Graham, G. April 2, 1921, [Convention date]. Actuating by hand power; buckets; cleaning; indicators; single-acting suction valveless bucket pumps; valves and valve seats, arrangement of.-A syringe of the kind in which the barrel is filled through a hollow piston-rod comprises a barrel 1 in which reciprocates a piston 2 containing a suction valve 18 controlling inflow of liquid through the hollow pistonrod 25 leading through pipe 27, 28 from the supply to the pump barrel, which has a discharge-valve 11 controlling delivery through the nozzle 6. A spring 30, surrounding the pistonrod, and compressed between the rear cover 12 and a collar 29 on the rod, effects the suction stroke, and the delivery stroke is effected by hand by inserting two fingers in the rings 14, 15 attached to the rear cover and gripping the attachment 31 to the piston-rod between the ball of the thumb and the index finger. The barrel preferably comprises a cylinder 1 of transparent material enclosed in a suitable casing 3, with an inspection aperture, to which casing are screwed the end covers 5, 12, after inserting the packing 13. The valve 18 is slidably mounted on a rod 30 rigidly attached to the valve 11, the surface of the rod being formed with a helical shape to produce rotation of the unseated valve when the piston is reciprocated for preserving the seatings clean. The grids 8, 9 limit the movements of the valves from their seats. A groove 24 in which packing may be inserted, is formed in the piston.
Patent GB-557707-A (GB)
Title: Improvements in or relating to relay timing arrangements
IPC: H01H43/30
Filed: 1942-05-28
Abstract: 557,707. Converting. STANDARD TELEPHONES & CABLES, Ltd., WOLFSON, H., and SHEPARD, S. C. May 28, 1942, No. 7232. [Class 38 (ii)] [Also in Group XXXVII] A circuit arrangement for periodically operating an electromagnetic relay A comprises a thermistor T connected so as to vary the current from a source S through the relay winding as the thermistor changes temperature, the relay eventually actuating contacts a which alters the resistance in the circuit so that the thermistor changes temperature in the reverse direction. The thermistor may be of negative or positive temperature coefficient and in series or parallel with the relay winding. It may be directly or indirectly heated and a circuit including two thermistors may be used. In the form shown in Fig. 2, the thermistor has a negative temperature coefficient and the contacts a serve normally to short circuit a resistance R2 so that a moderately large current flows through A and T. T heats up and decreases its resistance so that the current through A increases and eventually opens contacts a, whereupon R2 is introduced into the circuit, the current drops, T cools, causing further reduction of current which eventually releases A. The cycle is then repeated. Resistances R1, R2 are adjustable to vary the time period.
Patent GB-115701-A (GB)
Title: Improvements in or relating to Engine Valve Gear.
Inventor: MELLERSH-JACKSON WILLIAM JOHN
IPC: F01L7/10
Filed: 1917-05-19
Abstract: 115,701. Jackson, W. J. Mellersh-, (0. & B. Co.). May 19, 1917 Convention rotary motion.-A spherical valve, suitable for steam, compressed air, and internal combustion engines, compressors and pumps, has gyratory and rotary motions and is described Mapplied to a fourstroke-cycle engine. In the construction shown in Figs. 6 and 7, the valve distribution is effected by gyratory motion. The valve stem 6<b> is mounted in a crank arm 31b on the shaft 30b. The crank-pin 31<c> slides in a slot 16<c> in the base of a hollow worm-wheel 16<b> which is mounted in a carrier 16d to oscillate on a pin 16<e> and register with a worm 56 on a shaft 57 driven by bevel-gearing from the main crankshaft. The worm 56 has a curved contour to ensuea the accurate register of the teeth. The carrier 16d carries a roller 62 which is pressed on a cam 61 on shaft 57 by a spring 63 so that the crank-pin 31<c> and shaft 30b are rotated with a cyclic variation of velocity.