baber/WOPTO huggingface dataset:
Patent GB-416879-A (GB)
Title: Improvements in or relating to the control of aircraft
IPC: B64C13/00
Filed: 1933-10-26
Abstract: 416,879. Controlling aircraft. FAIREY, C. R., Cranford Lane, Hayes, Middlesex. Oct. 26, 1933, No. 29736. [Class 4.] In means for controlling aircraft, slotforming slats 12 situated one at each end of the wings 11 are controlled by means interconnected with the rudder, or the actuating-means therefor, so that operation of the rudder 22 may bring about the opening or closing of either slot as required or prevent either slot from opening. The slats may be spring controlled or free and the motion transmitted thereto may be damped by a dashpot or like device. In one form, one or other of the slot-forming slats 12 is actuated to form a slot on movement of the rudder bar 20 through a rod 15, a bell-crank lever 16 and a cable 17 which includes a tensioning-device 18 which permits the slats to be operated under normal circumstances by the usual means (not shown). The slats 12 are connected by links 13 and radius rods 14, pivoted at one end to the wing, to the rods 15. In a modification, one or other of the slot-forming slats 12, Fig. 3, is held closed according to the direction in which the rudder bar 20 is operated on depression of a pedal 25 which actuates a friction clutch to cause a drum 23 to move with the rudder bar. A cable 17 including a tensioning-device 18 wound around the drum 23 has its ends connected to bell-crank levers 16, the other arms of which are connected to the slats by rods 15. The slots in this case are formed automatically due to the aerodynamic forces acting on the wing.
Patent GB-520170-A (GB)
Title: Improvement in activation of silver catalysts
IPC: B01J23/66
Filed: 1938-10-14
Abstract: 520,170. Preparation of catalysts; olefine oxides. CARBIDE & CARBON CHEMICALS CORPORATION. Oct. 14, 1938, No. 29757 Convention date, Oct. 30, 1937. [Class 1 (i)] [Also in Group IV] Silver catalysts, particularly for use in the direct oxidation of olefines to olefine oxides at temperatures of 150‹-400‹C., are activated by treatment with a compound acting as a repressant which at small concentrations is gaseous between 150‹ and 400‹C. and which will react with the silver surface to form compounds capable of conversion to silver oxide or hydroxide by metal hydroxides, followed by treatment with barium or strontium hydroxide. Suitable repressants are ethylene dichloride, chlorine, sulphur chloride, sulphur trioxide, nitrogen peroxide or other chlorine-containing or acid-forming material. Preferably the silver catalyst has a roughened surface and it may be supported on granular inert material, e.g. silica stone, ceramically bonded alumina or sandstone, generally in the proportion of 4-20 per cent. by weight. The increase of activity is dependent upon the number of times the treatment with repressant and hydroxide is performed. This treatment is preferably carried out during the actual conversion of the olefines. The reaction may be carried out in iron tubes, wound for electrical heating and the temperature is regulated by boiling an organic liquid in a surrounding jacket. Half of the tube is packed with silica stone as a preheating section, and the gas mixture preferably contains 10 per cent. ethylene and 90 per cent. air. Examples describe the results obtained with catalysts containing silver, silver and barium peroxide, silver and strontium hydroxide initially, then after the addition of a repressant such as ethylene dichloride or sulphur trioxide and finally after activation one or several times with barium or strontium hydroxides. After several reactivations, the efficiency decreases and may be restored by leaching with hot water and repeating the activation. The reaction may be carried out at normal, increased or decreased pressure. Specifications 517,332, 517,333 and 518,823 are referred to.
Patent GB-324055-A (GB)
Title: Improvements in and connected with electric level luffing grab cranes
IPC: B66C23/10
Filed: 1928-10-16
Abstract: 324,055. Atkins, G. A. Oct. 16, 1928. Jib cranes.-In an electric level-luffing crane, gear for throwing out the main power switch when the load approaches the jib - head with the jib at any angle comprises a limit switch e<1> carried by a disc f loose on a shaft j, and a striking-pin e carried by a spur-wheel d on thesame shaft geared to the hoisting barrel W. The disc f is connected with the jib by a lever g and link h so as to turn' in the direction of the arrow 1 when luffing out. The wheel d turns in the direction of the arrow 2 during hoisting, and the parts are shown in Fig. 5 with the pin e engaging the switch arm to cut off power either on further luffing outward or on further hoisting. On luffing out from this position, a lug k on the disc f engages a lug l on the wheel d so that the hoisting rope is payed out. The jib is luffed by a motor G through gearing G<1>, H, I, J, crank arm M and link N. The hoisting rope w passes round compensating pulleys U, V on a lever S pivoted on the frame at T and connected with the jib by a link Q. The jib is balanced by a weight F pivoted. on the frame at B<1> and suspended by a link q from the block o of purchase tackle o, p, n, operated by the jib-supporting rope m. When used with a grab, the weight of the grab is balanced by a counterweight t suspended by a rope s wound on a barrel on an extension of the spindle of the hoisting drum.
Patent GB-207965-A (GB)
Title: Improvements in or connected with cutter chain machines for use in mining coal and other minerals
IPC: E21C31/00
Filed: 1922-11-01
Abstract: 207,965. Mavor & Coulson, Ltd., and Davies, A. W. Nov. 1, 1922. Coal-cutting machines.-In a cutter chain ma chine, means are provided for manually rotatin. the cutter chain sprocket and moving the chain when it is disconnected from the drive. The device is applicable to machines of the type de scribed in Specification 142,172, and comprises an auxiliary pinion F mounted on a shaft F<1> and meshing with a wheel D of the gearing only when the latter is disconnected from the drive B, as shown in Fig. 3. No such engagement can be made when the wheel D is connected to the drive, as shown in Fig. 2, and to prevent endwise movement of the shaft F<1> under such conditions, a latch G is provided and engages one of two circumferential recesses on the shaft, the end of which is formed for engagement by a spanner or the like.
Patent GB-375669-A (GB)
Title: Improvements in and relating to x-ray tubes
IPC: H01J35/16
Filed: 1931-10-28
Abstract: 375,669. R÷ntgen-ray tubes. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin.) Oct. 28, 1931, No. 29902. Convention date, Oct. 28, 1930. [Class 39 (i).] The wall a surrounding the discharge zone has its outer and inner surfaces maintained at the same potential and is surrounded by a separate vacuum chamber b. The wall a may be of metal, or may have interconnected metal layers a<1>, a<2> on its surfaces as shown. The outer wall of the chamber b may be of glass or other insulating material or may be partly or wholly of metal, a corrugated copper part c sealed to glass ends i allowing for heat expansions. The layer a<1> may be of tungsten, tantalum or other metal absorbing X-rays and a, disc of such metal may be mounted on the cathode. The Specification as open to inspection under Sect. 91 (3) (a) comprises also tubes in which the vacuum chamber b is connected to the discharge space by openings at one or both ends e, f, the openings being of such size and position that charges do not penetrate into the chamber b. This subject-matter does not appear in the Specification as accepted.
Patent GB-854745-A (GB)
Title: Improvements in or relating to light sources comprising at least one electric vapourdischarge tube
IPC: H01J61/32
Filed: 1959-09-02
Abstract: 854,745. Metal vapour lamps. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 2, 1959 [Sept. 5, 1958], No. 29957/59. Drawings to Specification. Class 39(1). A light source comprises at least one metal vapour discharge lamp, which may have a sodium filling, there being a number of straight tubular envelope portions joined by bands, and at least as many electrodes, in the source, as bends in the tubes, which are arranged so that each bend is heated to the same extent as the straight portions by electrodes which are adjacent to them. In one form a light source comprises an envelope, three parallel limbs joined by two bends so that each of two electrodes are arranged adjacent, and symmetrically to two limbs and the bend joining them. In another form the light source is formed by two U-tube shaped discharge tubes which are disposed so that the electrodes of each tube are adjacent to the bead of the other.
Patent GB-848020-A (GB)
Title: Improvements in or relating to thermal regenerators
IPC: F02G1/057
Filed: 1957-09-24
Abstract: 848,020. Thermal regenerators. PHILIPS' GLOEILAMPENFABRIEKEN N. V. Sept. 24, 1957 [Sept. 27, 1956], No. 30020/57. Class 64(1) In a thermal regenerator e.g. for a hot-gas engine, refrigerator or heat pump, the heat transfer material 1 is embraced by a wall 2 of elastic material under tension, e.g. rubber or nylon. The heat transfer material may comprise stacked perforated plates or sheets of wire gauze or a sintered material and may be secured to the wall 2 by means of an adhesive. The wall 2 may be braced as shown against gas pressures in the regenerator, by a supporting wall 4 of metal or synthetic resin.
Patent GB-840017-A (GB)
Title: High energy gaseous discharge devices
IPC: H05H1/10
Filed: 1958-09-19
Abstract: 840,017. Discharge apparatus. UNITED STATES ATOMIC ENERGY COMMISSION. Sept. 19, 1958 [Oct. 8, 1957], No. 30028/58. Class 39(1). A high energy gas discharge set up between two electrodes and pinched by its own magnetic field is stabilized by a further magnetic field provided by a solenoid in the form of a helix surrounding the discharge. In the apparatus shown one main electrode 19 is supported by an insulating member 23 in one end of a metal envelope 11 and the other main electrode 21 is attached to the other end of the envelope. A discharge is set up between the electrodes by closing a switch 29 to discharge a capacitor 27. A helix 13 formed from a strip of highly conductive metal such as copper is connected to a capacitor 24 and a switch 25 by way of jumpers 33 and 35 and establishes a longitudinal magnetic field. Adjacent turns of the helix 13 are spaced apart sufficiently to prevent a discharge occurring therebetween, and the gap between the turns is bridged by a second helix 15 supported on the helix 13 by insulating ribbons 17 so that the discharge is surrounded by a metallic shield. Purging means 12 and a gas source 14 are connected to the envelope 11 by ducts and associated valves (not shown). The apparatus may be used for the study of very hot plasmas or as a flash lamp, an aperture 30 in the helix 15 and a vitreous window 32 in the wall of the envelope 11 being provided for the latter purpose.
Patent GB-278913-A (GB)
Title: Improvements in brakes
IPC: F16D69/02
Filed: 1926-11-27
Abstract: 278,913. Graphite Products, Ltd., and Ridley, C. L. Nov. 27, 1926. Energy - absorbing elements; blocks and shoes; band brakes. - In a vehicle or other brake one or both of the cooperating surfaces are constituted in part by strips, blocks or plugs formed of or containing graphite or other solid non-metallic substance or mixture having lubricating qualities, these plugs being formed to the required shape and inserted i n t o correspondingly shaped perforations or grooves in a brake band, shoe or other braking element. In the construction shown a number of plugs E, which are preferably undercut or taper inwardly as shown, are inserted into holes in brake blocks B of cast iron riveted to a contractible steel band A, which forms a retaining means or backing for preventing the plugs from being driven outwardly. Preferably the plugs are distributed, e.g. as shown in Fig. 8, in such a manner that they wipe the whole width of the drum D or other co-operating surface. Modifications are described in which the plugs are applied to a brake drum, to the brake block of an ordinary railway wagon brake, and to the shoes of an internal expanding brake.
Patent GB-1145048-A (GB)
Title: Improvements in or relating to electrical signal compression networks
Inventor: FEUELL EDWARD ALBERT
IPC: H03K17/795
Filed: 1966-07-05
Abstract: 1,145,048. Pulse modulation circuits. STANDARD TELEPHONES & CABLES Ltd. 5 July, 1966, No. 30069/66. Heading H4L. A gating circuit comprises at least two transistors connected in series opposition with common emitter and base connections, the input to the gate being applied to the collector of one of the transistors and the output being taken from the collector of the other transistor via a capacitance and to earth potential via a resistance, and means for applying a non- linear gating signal to the transistors, the arrangement of the gate being such that the input or output currents thereof cannot exceed the sum of the gating signal currents in the gating circuits of the transistors. Basic sampling circuit. Fig. 1.-The input signal is supplied to the collector of transistor VT1, whose emitter is connected to the emitter of transistor VT2 and the output signal is taken across resistor R1, sampling pulses being applied via transformer T1 to the bases of the transistors. An input signal positive with respect to the voltage stored on capacitor C1 will cause a current Ic 1  to flow from the input via the path 1 and providing the transistor base currents Ib 1 , Ib 2  are maintained for a sufficient time the charge on capacitor C1 will increase until it is equal to the input voltage. At the same time a voltage is developed across R1 having an amplitude dependent on the rate at which C1 is being charged. The circuit is symmetrical and with a negative input signal a current Ic 2  will flow from C1 to the input path 2. The limiting factor is that 1c 1  or Ic 2  must not exceed Ib 1  + Ib 2 . Amplitude compression.-If the sampling pulses are non-linear so that the currents Ib 1 , Ib 2  are controlled according to, for example an exponential law, then the output voltage across R1 will represent the difference in amplitude between adjacent signal samples compressed by this law, thus providing " slope compression." Modifications.-In Fig. 4 (not shown) a balancing resistor is connected between the two transistors. An RC circuit may be included in the primary or the secondary circuit of transformer T1 to provide the non-linear sampling pulses. The leakage inductance of the transformer also may be arranged to produce the desired law. An arrangement is described, Fig. 8 (not shown), using photo-transistors to replace transistors VT1, VT2 of Fig. 1, the sampling pulses being replaced by a suitable light source.
Patent GB-503129-A (GB)
Title: Improvements in electric induction furnaces
IPC: H05B6/20
Filed: 1938-10-18
Abstract: 503,129. Electric induction furnaces. FINSPONGS METALLVERKS AKTIEBOLAG. Oct. 18, 1938, Nos. 30157 and 30158. Convention dates, Oct. 27, 1937 and June 30, 1938. [Class 39 (iii)] In a metal-melting furnace, particularly suitable for aluminium and its alloys, a chamber 1 is formed in refractory material 2 and communicates with the two ends of a channel 9 surrounding the core 14 and primary winding 13 of a transformer. The channel 9 consists of two straight vertical portions united by a horizontal portion provided with removable plugs 11. The abrupt changes in direction of the channel 9 cause separation of oxide and slag from the circulating metal and deposition on the wall of the channel. Cleaning of the channel may be effected through the chamber 1, and by removing the plugs 11. A similar 3-phase furnace is described. The furnace may be tilted about an axis coinciding with the lip 8 by a device 15.
Patent GB-775263-A (GB)
Title: Crosstalk compensation in double-sideband carrier frequency systems with carrier transmission
IPC: H04B3/32
Filed: 1955-10-21
Abstract: 775,263. Preventing inductive disturbances. STANDARD TELEPHONES & CABLES, Ltd. Oct. 21, 1955 [Oct. 22, 1954], No. 30163/55. Class 40 (4). In a system comprising a plurality of channels liable to mutual interference, the channels carrying double side-band signals using carriers of the same frequency, phase-shifting networks are provided to adjust the relative phases of the carriers to bring the interference to a minimum. The invention is applied to interference between side circuits and their associated phantom circuit where the phase shift of the interfering signals may assume arbitrary values. As shown, the side circuits S1, S2 and the phantom circuit Ph are fed by modulators M1, M2, MP supplied with carrier from a source G. Phaseshifting networks P1, P2 are introduced into the carrier connections for the side circuits and adjusted so that at the receiving end E the interfering signals received by the phantom circuit are in phase quadrature with the carrier associated therewith so that on demodulaton the interfering signal will be substantially zero. Since, however, such an adjustment will not in general correspond to minimum interference in the other direction, i.e. from phantom to side circuit, some compromise value of phase shift may be necessary. If the phase relationship between phantom and side circuit is the same for both side circuits a single-phase shifting device inserted in the carrier feed to the phantom circuit modulator may be used instead. If the systems are multiplex systems in which all the carriers are derived by frequency multiplication from a basic frequency, then should the phase shift of the interfering currents happen to be proportional to frequency, then the desired effect may be obtained simply by applying the phase shift to the basic frequency. In alternative embodiments the phase shifting networks may lie immediately after the modulators, or in the side circuits themselves, but in this case the phase-shifting circuits must be effective over a wide band of frequencies. In practice adjustable phase-shifting devices would be provided which would be adjusted for optimum interference attenuation whereupon they would be replaced by fixed phase-shifting devices constructed in accordance with the setting of the variable device. The phase-shifting networks may be T-sections of inductances and capacities. Specification 711,825 is referred to.
Patent GB-950427-A (GB)
Title: Infrared radiometer with background elimination
IPC: G01S11/12
Filed: 1962-08-07
Abstract: 950,427. Radiation detectors. BARNES ENGINEERING CO. Aug. 7,1962 [Oct. 5, 1961], No. 30186/62. Heading G1A. In an arrangement for detecting radiation from a target in the presence of background radiation, that portion of the latter which occurs in the same spectral region as the target radiation is balanced out in a differential arrangement involving two detectors selectively responsive to the spectral region of the target radiation and to a different spectral region of the background radiation respectively. The invention is particularly concerned with the detection of targets radiating in the infra-red region (e.g. rocket exhausts) in the presence of sunlit backgrounds. In one embodiment (Figs. 1 and 2) the detection arrangement comprises two photoconductive (lead sulphide) detectors 6, 7 together with respective filters 4, 5 mounted in a frame 8 which may be moved in the direction of the arrow by means of a micrometer screw 9. Filter 4 passes a (short wave) band in the visible spectrum (see also Fig. 3) and filter 5, which may be of germanium, has a cut-off at about 1.8 Á and so passes radiation in the infrared region. In operation, the device is initially balanced by pointing it at the sky or at a sunlit background and adjusting screw 9 until the relative proportions of the incoming radiation (imaged by optical systems 1,2,3 on the plane of the detectors) which fall on the detectors is such as to result in zero output,the detectors being differentially connected electrically. Fig. 2 shows the balance adjustment with a typical background radiation in which 10 to 15% of the latter falls on detector 6 and the remainder on detector 7, the respective filters 4 and 5 not being shown. After initial balance, which may have to be repeated whenever the background conditions change, the device is then effective in response to radiation in the infra-red region to produce a resultant electrical output. In a second embodiment (Fig. 4) the two detectors 11, 12, are arranged back-to-back, the former, 11, which may be made of silicon, gallium arsenide or other material which responds to (short wave) radiation in the visible spectrum and transmits long wave (infra-red) radiation, being mounted on a substrate 13,of fused silica or other material transparent to the near or intermediate infra-red (e.g. lead sulphide or indium antimonide), on the other side of which the second detector 12 is mounted, the latter, which responds to the near or intermediate infra-red being of lead sulphide or indium antimonide. The two detectors are differentially connected electrically and for balancing out background radiation a germanium filter plate 14 which passes infra-red but cuts-off radiation in the visible spectrum completely is moved across the field of view until zero output is obtained. Specification 898,205 and U.S.A. Specification 2,961,545 are referred to.
Patent GB-987870-A (GB)
Title: Improvements in or relating to portable projectors
IPC: G03B21/30
Filed: 1961-08-22
Abstract: 987,870. Optical-projectors. MEOPTA NARODI PODNIK PREROV. Aug. 22, 1961 [Sept. 22, 1960], No. 30189/61. Heading G2J. A collapsible portable magazine slide projector comprises in one form (Fig. 1) a lamp 2, a reflector 3, condenser lenses 4, 5, a heat filter 6, a mirror 7, a projection aperture 9, for accommodating slides 8 and a projection lens 10 carried by a wall 14 hinged at 15 to the projector casing 1. The projector casing also accommodates a slide magazine 11 slidable parallel to the axis of lens 10 and retractable against loading of a spring 20 into a space formed by walls 12,13. These walls, hinged to the projector casing and to wall 14, collapse on to the casing 1 for transport purposes an in Fig.2,(not shown). In use, after inserting a stack of slides into the retracted magazine a slide member 16, sliding on a guide 17 and urged in the left hand position by a spring 18, is operated whereby the lowermost slide 8 is moved into the projection aperture 9. On further operation of the member 16, that slide 8 already in the aperture 9, is forced out of the aperture to fall freely beside the projector. In an alternative form (Fig. 5), the magazine 34 is mounted above the optical system 22-27 which, apart from the omission of the inclined mirror, is otherwise similar to that described above. A support 32 for the projector is adjustably connected to a casing wall 28 by a screw 33.