baber/WOPTO huggingface dataset:
Patent GB-774162-A (GB)
Title: Improvements in or relating to machines for use as mechanical shovels and the like
IPC: E02F3/30
Filed: 1955-07-04
Abstract: 774,162. Earth - excavating machines. ARNAL, F. R. July 4, 1955 [July 6, 1954], No. 19305/55. Class 68 (1). To permit of intermittent movement over the ground of a machine having a chassis A, a turntable B, a boom C, a tool-supporting arm D, and jacks F and G on modification of the angle at the apex of the boom C and arm D when the tool of the arm D is forced against the ground, the chassis A of the machine is supported on a pair of wheels 14 and is furthermore provided with an anchoring device for supporting in conjunction with the wheels 14 the chassis A when the tool e.g. a scoop, pick, or rammer, is out of contact with the ground. The wheels 14 are movable bodily and are capable of occupying in addition to the first position, that permits of the operation of the machine and the described movement of the chassis, a second position facilitating towing of the machine, in which the axis of the wheels is disposed nearer said plane and is substantially in vertical alignment with the centre of gravity of the whole machine. Each wheel may be mounted on a stub axle carried by a crank pivotally mounted on the chassis or on a common axle. The stub axles or the common axle can be held against the rear or an extension of the rear of the chassis or against suspension springs on the chassis.
Patent GB-464204-A (GB)
Title: Improvements in and relating to the manufacture of refractory ware
IPC: B28B19/00
Filed: 1935-07-06
Abstract: 464,204. Refractories. SILIKA-UND SCHAMOTTE - FABRIKEN MARTIN & PAGENSTECHER AKT.-GES. July 6, 1935, No. 19341. Convention date, Jan. 21. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 7, 1936.] [Class 22] [Also in Group XII] The resistance of refractory articles e.g. bricks to spalling is increased by providing in the article dividing surfaces which extend at least to the surface of the article most effected by spalling and which subdivide the material of the article into cells. The dividing surfaces which may be about À1mm. thick are formed from material which is distinct from that of the article, which does not function to bind the material of the article, and which is in the form of foil or powder, e.g. it may be iron or iron oxide foil, aluminium or aluminium oxide foil, or powdered aluminium oxide. The maximum cross-sectional area of the individual cells is preferably 2-20 sq. cm. and in the case of a brick the cellular structure preferably extends to a depth of 2-4 cm. If the cells are of elongated form the main axis of the cells preferably lies in the direction of travel of the heat during the spalling action. Fig. 1 shows a brick made by coating with powdered aluminium oxide previously moulded bodies of sintered magnesite a and embedding them in sintered magnesite, the magnesite containing a large percentage of iron. Fig. 2 shows a brick made by embedding a honeycomb like structure b of sheet iron À15 mm. thick in dead burnt magnesite having a low content of iron. Fig. 3 shows a brick made by wrapping portions of a mixture of about equal parts of chromite and magnesia in aluminium foil and embedding the spherical structures c so produced in a similar mixture. In all three examples the bricks are moulded by compression in a mould and burnt in the usual manner. Specification 461,240 is referred to. The Specification as open to inspection under Sect. 91 comprises also the subjectmatter of Specification 461,240, but this does not appear in the Specification as accepted.
Patent GB-593473-A (GB)
Title: Improvements in locking devices
IPC: F16K35/10
Filed: 1945-07-25
Abstract: 593,473. Looking devices. ELSWORTH, G. July 25, 1945, No. 19430/44. [Class 44] [Also in Groups XXIX and XXXVII] A locking device for a push-pull electric switch or petrol tap, &c., comprises a U-shaped member 5 which forms the hasp of a padlock 8 and is adapted to be slipped over the operating shank of the switch between the body 1 and the operating knob 4.
Patent GB-127501-A (GB)
Title: Improvements in and connected with Means for Arresting Railway Vehicles and the like.
Inventor: HARRINGTON FREDERICK CHARLES A
IPC: B61L3/04
Filed: 1918-11-26
Abstract: 127,501. Harrington, F. C. A. Nov. 26, 1918. Track apparatus for stopping trains. - A brake valve lever k is opened by a vertically sliding rod g carrying a cross-head i with adjustable extensions h which rest on the horns e<1> of a pivoted member e, the downwardlyextended arm a of which engages a track ramp. The member e is controlled by springs r attached to it and to a fixed guide-frame c. The rod g is held raised, after operation, by a pawl and notch device n, m. The upper end of the rod g is free of the brake valve, and the hook or fork member k may be connected directly to the rod g or by link-work so as to operate the valve lever upwardly, downwardly, or horizontally.
Patent GB-1068334-A (GB)
Title: Improvements in laminated materials and means and method of making them
Inventor: FAIRWEATHER HAROLD GEORGE CRUI
IPC: D06M17/00
Filed: 1963-09-11
Abstract: 1,068,334. Laminates and laminating. COIN SALES CORPORATION. Sept. 11, 1963, No. 19540/63. Heading B5N. [Also in Division D1] In apparatus for producing laminated fabrics, a pick-up roll 16 transfers adhesive from trough 15 to a pattern roll 17 and the latter applies the adhesive to spaced points on one surface of a first web of fabric 1, this web then being united to a second web 20 between an apron 3 and a roll 5. The pattern roll is provided on its surface with wells and the adhesive used is one which will cause air to be trapped at the bottom of the wells during transfer of adhesive from the pick-up roll. Thus, when a well moves out of the nip of rolls 16, 17, the trapped air causes the adhesive in the well to stand proud of the surface of roll 17. The fabrics may each be of woven or knitted construction and fabric 1 may comprise more than one layer, its separate layers having previously been united at spaced points as above. The adhesive should not cover more than 25% of the area of fabric 1, and each spot of adhesive should be larger than the opening in the fabric. Roll 5 may be heated and an oven may be provided between this roll and storage roll 20.
Patent GB-686526-A (GB)
Title: Improvements in or relating to noise suppression circuits in radio receivers
Inventor: EGGLETON CHARLES WILLIAM
IPC: H03G11/04
Filed: 1948-07-22
Abstract: 686,526. Radio interference suppression circuit. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 21, 1949 [July 22, 1948], No. 19583/48. Class 40 (vi). An interference suppression circuit in a radio receiver comprises a first element consisting of a non-linear resistance connected across the demodulated signal channel, and a second element consisting of a rectifier and a smoothing circuit which develops a varying voltage from the demodulated signals to bias the first element so that its limiting level varies with the general signal level. Fig. 1 shows part of a radio receiver in which audio frequency signals are amplified by valve 1 and then by the output valve 5. A limiter diode 12 in series with a time constant circuit 17, 18 is connected across the input to valve 5, and a diode 16 fed from the audio output of valve 5 is also connected to the time constant circuit 17, 18. The bias applied to diode 12 due to the time constant circuit varies with the amplitude of the signals, and thus varies the limiting level so that diode 12 conducts only during noise impulses of large amplitude. A modification is described in which a second pair of diodes with an associated time constant are also similarly connected in the circuit, the diodes being in reverse sense, so that both positive and negative noise peaks are limited. Specifications 476,218, 532,521 and 639,183 are referred to.
Patent GB-1132767-A (GB)
Title: Production of barium carbonate particles
IPC: C04B33/13
Filed: 1966-05-04
Abstract: 1,132,767. Barium carbonate particles. PPG INDUSTRIES Inc. 4 May, 1966 [5 May, 1965], No. 19659/66. Heading C1A. Rod-shaped particles of barium carbonate are prepared by reacting barium sulphide solution with carbon dioxide for a time sufficient to precipitate up to 50% of the soluble barium values as barium carbonate seed crystals. Seed crystals are first formed when a barium sulphide solution at a temperature below 40 C. is contacted for less than 60 seconds (preferably 0.01 to 10 seconds) with C0 2 . This solution is then continuously carbonated for several hours with more C0 2  until nearly all the barium values have been precipitated and Na 2 CO 3  is then added to complete the precipitation at pH 6. The barium carbonate particles formed have dimensions less than 0.3 by 0À1 micron, good flowability, surface area of about 14.0 m.<SP>2</SP>/g., structural clay reactivity as defined in the Specification less than 9 and a calcium sulphate reactivity from 100 to greater than 400.
Patent GB-476819-A (GB)
Title: Improvements in totally enclosed fan cooled dynamo electric machines
IPC: H02K9/14
Filed: 1936-07-15
Abstract: 476,819. Cooling dynamo electric machines. ENGLISH ELECTRIC CO., Ltd., and BINNEY, E. A. July 15, 1936, No. 19686. [Class 35] A totally enclosed machine has separate ducts or sets of ducts for external air spaced apart about the periphery of the casing, the external surface of the main part of the casing between the ducts being exposed to the surrounding atmosphere. In the form shown, external air entering the ducts 6a in the commutator enclosure at one end of a double armature machine continues along ducts formed between the ribs 6d, the sets of ducts being separated by parts of the machine casing to which the surrounding air has access, ribs 6f being provided on these parts. A cover (not shown) encloses each set of ribs 6d and a band also surrounds the commutator enclosure, but is removed when access to the brushgear is to be obtained.
Patent GB-597184-A (GB)
Title: Improvements in or relating to electrical signal selecting circuits
IPC: H03K17/54
Filed: 1945-07-31
Abstract: 597,184. Pulse selecting circuits ; radiolocation. WEBLEY, R. S. July 31, 1945, No. 19710. [Class 40 (v)] A signal selecting or strobing circuit, such as may be employed in the radar system described in Specification 581,996, comprises a series capacitor and a shunt resistor in the signal path, with means for reducing the value of the resistor for the duration of the signal selecting or strobe pulse so that a rapidly rising and slowly decreasing voltage, of opposite sense compared with the signal voltages, is built up across the resistor by the selected signal. Pulse signals, Fig. 3, are fed via cathode follower V1, Fig. 2, to capacitor C and resistor R. Valve V2 is normally non-conducting due to the bias supplied over resistor R6, but when conducting by the strobe pulse, Fig. 4, fed to the grid, reduces the time constant of the circuit so that the selected signal produces a wave a, b, c, d, Fig. 5, at the output terminal P. This wave, if passed through a diode and smoothed, produces the waveform shown in Fig. 6, the peak amplitude of which is proportional to the peak amplitude of the selected signal (point a or c, Fig. 5). Long ground wave pulses will be differentiated by the circuit CR in the absence of strobe pulses to give the wave shown in Fig. 7, which will provide the smoothed and rectified output shown in Fig. 8. The effect of this is to prevent small amplitude echo signals of short range, which do not raise the negative portion of the wave of Fig. 7 above earth potential being detected. In order that the amplitude of the selected signals may be measured effectively from the base of noise, capacitor C2, resistor R5 and diode V3 may be arranged to develop at point Q, across a low impedance, a positive bias equal to the mean noise amplitude. Specification 582,503 also is referred to.
Patent GB-1270693-A (GB)
Title: Frame structure
Inventor: HALKO JOHN JEROME JR
IPC: F16B7/00
Filed: 1969-04-17
Abstract: 1,270,693. Frame corner joints. J. J. HALKO JNR; B. BURKE and A. A. BLACKSTIEN. 17 April, 1969 [25 July, 1968], No. 19730/69. Heading E1J. [Also in Division A4] In a corner joint, mitred tubular members 10 are connected by an angle bracket 12 comprising a stem 14 with a lateral tongue 16, the stem having a major portion positioned in one member 10 and a portion with the tongue positioned in the other member 10. The portions of the stem and the tongue are snug sliding fits in their respective frame members 10. The bracket is formed by extruding a spine with a fin, part of the fin then being cut away. In Fig. 5 (not shown) a stem carrying a plurality of tongues which can be trimmed to fit members 10.
Patent GB-602007-A (GB)
Title: Improvements in variable inductance
IPC: H01F17/04
Filed: 1945-08-01
Abstract: 602,007. Inductances. DUMONT LABORATORIES, Inc., A. B. Aug. 1, 1945, No. 19791. Convention date, Aug. 22, 1944. [Class 38 (ii)] A variable inductance comprises a coil which may be moved relative to a core consisting of joined, cylindrical, coaxial portions of different magnetic permeability in which rigid studs are embedded to form supports for the inductance. A coil 7 is wound on a former 6 which may be made by winding a strip of impregnated paper and enclosed in a cylinder 8 of thin insulating material such as celluloid or mica. A core which is a tight sliding fit in former 6 is in two parts, one 4 of powdered magnetic material, and the other 3 of,insulating material. Copper or other non-magnetic metal rods 1, 2 are embedded at one end in parts 3, 4 respectively to form supports for the core and terminals for the coil 7 the ends of which are connected to the rods by flexible leads 10, 12. A strip 15 of insulating material is laid round the coil and has its 'ends joined together to form a tab 16 bv which coil 7 can be moved from one end of the composite core to the other to vary the inductance. A brass disc may be fixed to the outer end of core part 3 to reduce the minimum inductance value, Figs. 4 and 5 (not shown). Coil 7 may be of shorter length but of greater diameter. Fig. 3 (not shown). The non- magnetic part of the core may be made conducting, for example, of powdered carbon in an insulating shell, and the two adhering parts of the core may be connected in series or parallel with the coil 7, Fig. 5 (not shown). Specification 572,220 is referred to.
Patent GB-596743-A (GB)
Title: Improved spark plug and methods of making the same
IPC: H01T13/38
Filed: 1945-08-02
Abstract: 596,743. Glass. GENERAL MOTORS CORPORATION. Aug. 2, 1945, No. 19841. Convention date, Aug. 25, 1944. Drawings to Specification. [Class 56] [Also in Groups XXVII and XXXVI] Glass of one of the following compositions is used in a seal of glass and mica for holding a sparking-plug insulator in the metallic shell. A suitable phosphate glass comprises potassium carbonate 11 per cent, sodium carbonate 18 per cent, aluminium phosphate 45 per cent, sodium meta-phosphate 10 per cent, boric acid 3 per cent, zinc oxide 9 per cent, lithium carbonate 4 per cent. The phosphate content, computed as P2O5, may vary between 35 to 45 per cent and the alumina content from 20 to 30 per cent. Another suitable type of glass may have a composition of S1O2 45 per cent, K2O 14 per cent, Na2O 6 per cent, CaF2 5 per cent, PbO 30 per cent. A small proportion of boric oxide glass comprising 95 per cent boric oxide and 5 per cent magnesium oxide may be included in the seal.
Patent GB-200382-A (GB)
Title: Improvements relating to the automatic regulation of the output of an electric installation
IPC: H02J3/38
Filed: 1922-07-21
Abstract: 200,382. Doloukhanoff, M. July 21, 1922. Switching-systems; systems depending on the use of static transformers.-An electric installation comprising a number of graded generators, transformers, or rotary converters is provided with a switching device by means of which various combinations are obtained in accordance with the load. The corresponding terminals of the secondary windings of five graded transformers I - - V, Fig. 1, are connected to a common load 1 and the other terminals of the wind-' ings are connected to contact bars 10 - - 14. The terminals of the primary windings are similarly connected to a common lead 1 and to contact bars 10 - - 14. The contact bars are provided with insets of non-conducting material of different lengths and are swept over by brushes 6, 7 operated by a device 2 in the load circuit. The position and lengths of the conducting and non-conducting portions of the contact bars are such that if the outputs of the several transformers vary from one to five kilo-watts with a common difference of one kilo-watt, outputs of from one to fifteen wilo-watts may be obtained by the various combinations of the transformers, the difference between the output of each combination being one kilo-watt. A switch comprising concentric contact-arcs and a rotary arm may be employed.
Patent GB-166813-A (GB)
Title: Improvements relating to gas respirators
IPC: A62B19/00
Filed: 1920-07-09
Abstract: 166,813. Guillemard, J. M. V. H. July 9,1920. Addition to 148,192. Respirators.- The oxidizing and absorbing reagents employed in the apparatus according to the parent Specification are now placed in separate containers 1, 8 connected by a detachable pipe 11. To prevent exhaled moisture from entering the absorbent - container 8 non-return valves are disposed at 13, 14.
Patent GB-812333-A (GB)
Title: Improvements in or relating to ultra-sonic methods and equipment
IPC: G01N29/24
Filed: 1954-04-12
Abstract: 812,333. Ultrasonic inspection devices. LEWIS, E. M., and FOX, J. W. July 12, 1955 [April 12, 1954], No. 20147/55. Divided out of 812,331. Class 118 (2). Apparatus for ultrasonic examination of materials using two relatively movable probes is provided with means for indicating the focus or out-of-focus condition of said probes, i.e., whether or not the relative position of said probes is such that they are directed towards the particular point under inspection, said means including a coupling extending from at least one of the probes and indicating or control means responsive to a stress in said coupling. A probe, indicated diagrammatically by the chain line 1, comprises a transducer 4 with coupling wedge 2 for ultrasonic inspection of a specimen 3 and has attached to it a flexible cable, wire, rod or the like 5 the other end of which is secured to a fixed part of the apparatus or to another probe with which probe 1 is to be focused. Cable 5 may include the electrical connections to the probe. The end of cable 5 is attached to one pinion 6 of differential gearing 6, 7, 8, 9. The pinion 8 is fixed to the probe body. Pinion 9 is arranged to be driven via a variable-speed friction gear 10, 11, 12 by a roller 17 in contact with the specimen 3. The friction roller 11 is moved by rack 13 and pinion 14 driven by roller 16 in contact with specimen 3 but with its axis at right angles to the axis of roller 17. Roller 16 should be situated at that part of the probe 1 about which the operator normally tends to rotate it in use. The parts are suitably proportioned such that concentric movement of the probe about the point of focus causes no stress in cable 5 because the rotation of pinion 9 by roller 17 exactly offsets the stress which would be produced were pinion 6 fixed. Moving the probe nearer to or farther from the point of focus merely rotates roller 16 which causes no stress in cable 5 but prepares the friction gear ratio for subsequent rotation of roller 17 due to any sideways movement of the probe. The initial determination of focus is made by temporarily increasing the gain of the receiving amplifier as described in Specification 812,332. A device such as pressure-operated contacts may be used at the end of the cable 5 to operate a buzzer or light.
Patent GB-596947-A (GB)
Title: Improvements in or relating to mercury vapour devices
IPC: H01J13/14
Filed: 1945-08-07
Abstract: 596,947. Metal vapour discharge apparatus. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Aug. 7, 1945, No. 20185. Convention date, Aug. 25, 1944. [Class 39 (i)] Arc back is reduced in a mercury vapour electric device by the provision of a box at the end of the pumping connection to prevent splashing of the mercury returning through the connection. The container 1. is evacuated through a pumping connection 2, at the end of which there is secured to the side of the container a box 10 of sheet steel provided with a tubular passage 15 extending into the vicinity of the cathode 4 and with a louvred window or passage which permits gas to pass to the pump, a struck-up portion 17 preventing the splashing of mercury through this opening. External and internal cooling coils 6, 7 respectively are provided,
Patent GB-616560-A (GB)
Title: Improvements in or relating to boat lowering and hoisting winches
IPC: B63B23/18
Filed: 1946-07-05
Abstract: 616,560. Hand-driving mechanism. WELINMACLACHLAN DAVITS, Ltd., and MACLACHLAN, C. D. July 5, 1946, No. 20213. [Class 136 (ii)] [Also in Group XXX] A winch for manual and for power operation has a doubleended shaft adapted at each end 1 to receive a removable handle 2, the ends being differently formed with respect to the driving member of a portable motor in such manner that, whereas the handles can be fitted to both ends, the driving member can be fitted to one end only. As shown, the two ends of the same operating shaft are each squared at 1 to take the same or similar handles 2. We wish to use, as an alternative mode of drive, an electric or pneumatic drill motor, the shaft 7 of which is adapted by the hollow box member 5 to fit over and drive the squared end 1 of the winch. To this end on one squared end only of the winch shaft is welded stud 3. This permits the use of handle 2 since a passage 4 is drilled in the handle through which the stud 3 may pass, but prevents the use of the drill motor because the hollow box member cannot engage with the squared end. Alternatively, the squared end may be slotted, or cut away at one or more of its corners, and the box member correspondingly shaped to fit.
Patent GB-1270701-A (GB)
Title: Drive circuit for a d.c. motor
Inventor: LITTWIN ARTHUR KENNETH
IPC: H02P7/26
Filed: 1969-04-21
Abstract: 1,270,701. Control of D.C. motors. A. K. LITTWIN. 21 April, 1969 [1 May, 1968], No. 20240/69. Heading H2J. While a D.C. motor is dynamically braked from a high speed to a lower speed the supply is disconnected (to protect supply rectifiers from overvoltage); braking is terminated, and the supply re-connected, by means sensitive to the armature voltage during braking. The motor is a compound machine and the reduced speed is obtained by short circuiting a rheostat in series with the shunt field. A complete sequence of full speed-slow speed-full speed again is effected by programmed relays, and the means sensitive to the armature voltage comprises a relay winding connected across the armature and which is in opposition to another winding connected across the supply. While braking is taking place the supply is held disconnected by relays controlled by an electronic valve which is switched by the voltage on a chain of resistors across the armature. During acceleration a second valve is controlled by further resistors responsive to the motor current; if this becomes excessive the valve operates relays which short circuit the shunt field rheostat. This is thus inserted intermittently until full speed is reached. The circuit diagram (not shown) has many elements not relevant to the invention; they concern the operation of a grinding machine, which the motor drives, to grind and dress threads, but this is not fully described.
Patent GB-1000185-A (GB)
Title: Improvements in and relating to the fractionation of polymers
Inventor: VAUGHAN MERVYN FRANCIS
IPC: C08F6/04
Filed: 1962-05-25
Abstract: Polymers, e.g. polyethylene or polystyrene, are fractionated by passing a solution of the polymer, e.g. in benzene, through a body of dimensionally stable, porous particulate silica gel in which the gel liquid is the same as the polymer solvent.  The silica gel may have an average diameter of 100-250 microns and may be organo- or aero-gels or gels formed by mixing pyrogenically produced silica with benzene.